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Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, reports on September 2, 2024: Good technical articles are worth reading carefully! As key equipment in the RTO system, whether the design and selection of the fan and the fan system are correct determines the safe production of the entire system and the economic benefits of the enterprise. Today, this article will elaborate and explain in detail from the perspectives of the classification, principle, explosion-proof and other aspects of the fans required in the RTO system, hoping to provide a certain degree of guidance and suggestions for our fellow industry partners.   For RTO systems, the commonly used fans include centrifugal medium and high-pressure induced draft and ventilator fans and axial flow medium and high-pressure induced draft and ventilator fans. According to the material, fans can be classified into metal fans and non-metal fans. Among them, commonly used metal fans are mostly carbon steel, SS304, SS316L, duplex steel, etc., while non-metal fans are generally made of FRP, electrostatic conductive FRP, PP, etc. In the RTO system, fans are classified into the following types: fans that come into contact with exhaust gas and fans that do not. Among them, fans that come into contact with exhaust gas include main pipeline exhaust and supply fans as well as relay fans. Fans that do not come into contact with exhaust gas include combustion-supporting fans, reverse purging fans, and leak-proof fans, etc. For general fans that come into contact with waste gas, material selection and design should be based on the components and characteristics of the waste gas. For fans that do not come into contact with waste gas, design and selection only need to be carried out according to the total pressure and air volume of the fan.   Fans are the general term for gas compression and gas conveying machinery. They convert the mechanical energy of rotation into the pressure energy and kinetic energy of gas and convey the gas out. They usually have the following parameters that need to be determined   1. Flow rate, including air volume and standard air volume; 2. Pressure, static pressure at intake and exhaust, static pressure of the fan, total pressure, and pressure increase; 3. Gas medium, including temperature, humidity, density, dust content and the composition of the gas, etc. 4. Rotational speed; 5. Output power is generally expressed in KW.   In the RTO system, we usually calculate the pressure loss of the pipelines and equipment within the system first as the total pressure of the fan. The air volume is then calculated based on the exhaust gas flow rate of the entire plant's exhaust gas collection system. This way, the total pressure and air volume of the RTO system's induced draft fan can be determined. Of course, when choosing a fan, a margin of 1.05 to 1.2 needs to be considered. Because the selected fan must meet the system requirements in terms of total pressure and air volume when operating at full load. However, some first-line domestic fan manufacturers have already taken this factor into account and integrated it into the selection software. You only need to input the environmental conditions and process conditions.   So, exactly how to determine the air volume and pressure? First, the upper limit of wind speed or air change rate needs to be determined in accordance with the HVAC standards of the relevant industry. After determination, the exhaust gas flow rate should be determined based on the exhaust gas emission volume of the pollution source emission point and the size of the pollution source space, which is what we call the fan air volume. Secondly, the pressure of the fan should be determined based on the pressure loss of the equipment and pipelines. Here, let's introduce what the pressure of the fan is.   In the RTO system, in order to normally draw the organic waste gas (VOCs) to the RTO treatment boundary area and convey the treated clean air to the chimney for discharge, it is necessary to overcome the pressure loss of the entire system's pipelines and equipment. The fan must generate these pressures. The fan pressure is divided into three forms: static pressure, dynamic pressure, and total pressure. The pressure that overcomes the aforementioned air supply resistance is called static pressure. Static pressure is the pressure exerted by a gas on the surface of an object parallel to the gas flow. It is measured through holes perpendicular to its surface. Dynamic pressure is the form of converting the kinetic energy required in gas flow into pressure.   Pt=pv2/2 In the formula, Pd represents dynamic pressure ρ- Density of gas (kg/m³) v- Velocity of gas (m/s) The total pressure Pt is the algebraic sum of dynamic pressure and static pressure, that is Pt=Pd+Ps   In fact, in the RTO system, apart from paying attention to the fan pressure and air volume, the explosion-proof of the fan is another top priority. This is because the RTO is a high-temperature oxidation device, and the media it processes are all flammable, explosive, toxic and harmful organic compounds, which pose certain dangers. Therefore, the explosion-proof of the fan becomes one of the most fundamental safety measures. The fan motors used in the RTO system are generally selected as flameproof motors. Besides the motor being explosion-proof, the fan itself needs to be treated to be spark-free. For instance, the impeller of a metal fan should be made of alloy material, and the outlet should be treated to be spark-free. For non-metal fans, the non-metallic materials must be electrostatic conductive materials; otherwise, static electricity will pose a significant risk.   The fans in the RTO system are basically in continuous operation. Attention should be paid to lubrication and cooling, and regular lubrication and maintenance should be carried out. Taking the lubrication cycle and inlet and outlet water volume of a certain brand of fan as a reference, it is necessary to ensure the stable and continuous efficient operation of the RTO induced draft fan to guarantee the economic benefits of the enterprise.   In RTO systems, when fans convey high-concentration VOCs, explosive gases, high-concentration dust, ultrafine particle materials, toxic gases, and gases with pungent odors, to prevent the leakage of these gases, it is recommended to select low-leakage or zero-leakage ones. At the same time, it is necessary to choose shaft seals above packing seals. For zero-leakage, it is best to use compressed air seals and ensure proper shaft seals. In the active pharmaceutical ingredient (API) industry, due to the characteristics of the exhaust gas components, we recommend that the system be designed under negative pressure. This can prevent the escape of toxic and harmful gases and avoid the potential safety hazards to operation and maintenance personnel and enterprises as a result.   In summary, the RTO system mainly consists of the main fan, the rear induced draft fan, the combustion-supporting fan, the reverse purging fan, as well as the drying fan and the adsorption fan. Both the main fan and the rear induced draft fan of the RTO are equipped with frequency converters. The fans are linked with the pressure inside the pipeline to ensure that the fans maintain the pressure inside the pipeline to meet the process requirements. The fan adopts explosion-proof fan and variable frequency motor, with the rated frequency of the motor being 50Hz. During operation, the system can automatically adjust the fan frequency and air volume according to the changes in air volume and the pressure in the pipeline before the fan, saving energy and reducing consumption, and ensuring the stability of the production line within the user's range. In addition, RTO operation and maintenance inspection personnel need to regularly maintain and service the fans based on the on-site usage conditions. It is essential to ensure that the most reasonable fan air volume and total pressure are selected according to the process conditions of the client, supplemented by regular maintenance operations. Only in this way can the entire system operate safely, stably and efficiently.   Waste Gas Treatment, RTO, CO

Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, reports on September 3, 2024: Compared with RTO incinerators, TO incinerators can also solve the problem of meeting the standards for VOCs waste gas in high-concentration VOCs conditions and conditions where waste gas and waste liquid are co-burned. Due TO the low price of natural gas abroad, customers choose TO incinerators more widely. Today, let's take a good look at the differences in the design of TO incinerators between the United States and Europe abroad, which can provide some practical selection suggestions for domestic customers when choosing TO incinerators.   In the field of industrial waste gas treatment, the TO furnace (direct-fired oxidation furnace) is a common device used to remove harmful substances from waste gas through direct combustion. There may be some differences in the design principles of TO furnaces between the United States and Europe. These differences may stem from different environmental protection regulations, industrial standards, energy efficiency and levels of technological development.   The following is an analysis of some possible differences in design principles   01 Strict environmental protection requirements   Environmental protection regulations in different regions may have different requirements for the design of TO furnaces. For instance, Europe may pay more attention to the removal efficiency of certain specific pollutants in exhaust gas, while the United States may impose stricter restrictions on certain industrial emissions.   02 Reduce energy consumption and operating costs   Europe may be more inclined to adopt energy-saving designs, such as efficient heat energy recovery systems, to reduce energy consumption and operating costs. American design may place more emphasis on the reliability and durability of equipment.   03 Safety of operation and maintenance   Safety is a key factor in the design of TO furnaces. Both the United States and Europe require that the design of TO furnaces must ensure the safety of operation and maintenance, but the specific safety standards and requirements may vary.   04 Efficient application of Technology   Europe may be more inclined to adopt advanced combustion technologies and automated control systems to enhance processing efficiency and reduce human errors, while the United States may pay more attention to the maturity and cost-effectiveness of the technology.   05 Waste heat recovery system   European designs may place more emphasis on the integration of waste heat recovery systems to enhance energy utilization efficiency. The design in the United States may place more emphasis on the economy and practicality of the waste heat recovery system.   06 Materials and Manufacturing   Different regions may have different requirements for the materials and manufacturing processes of TO furnaces, which may affect the durability, corrosion resistance and maintenance costs of the furnace body.   07 Operation and Maintenance   The United States and Europe may have different guiding principles for the operation and maintenance of TO furnaces, which may affect the operational stability and maintenance costs of the equipment.   08 Summary   Although there may be differences in the design principles of TO furnaces between the United States and Europe, the ultimate goal is TO help ensure that TO furnaces can effectively handle industrial waste gas, while meeting the environmental protection requirements and industrial standards of different regions to ensure the compliance of waste gas treatment. In addition, during the operation of the TO furnace, reasonable maintenance and monitoring are required to maintain stable processing efficiency and safe operation!

Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, on September 27, 2024, excerpted from the VOCs reduction workstation. It is well known that the tank breather valve is a ventilation device installed on the top of the storage tanks for Class A, B, and C liquids in conjunction with the flame arrester. It is an important accessory for protecting the safety of the storage tanks. It consists of two parts: a pressure valve and a vacuum valve. One of its functions is to maintain the airtightness of the oil tank and, to a certain extent, reduce the evaporation loss of the oil. Second, it can automatically regulate and balance the pressure inside and outside the oil tank through ventilation. A good breathing valve is also an important device for reducing VOCs emissions at the source in storage tanks!   I. Inspection of the breathing valve of the storage tank   1 The common faults of breathing valves mainly include: air leakage, jamming, adhesion, blockage, freezing, and the pressure valve and vacuum valve being always open, etc. (1) Air leakage: It is generally caused by rust, hard objects scratching the contact surface between the valve and the valve disc, deformation of the valve disc or valve seat, and tilting of the valve disc guide rod, etc. (2) Jamming: This often occurs when the breather valve is installed incorrectly or the oil tank deforms, causing the valve disc guide rod to be skewed and the valve stem to rust. During the up and down movement along the guide rod, the valve seat cannot reach its proper position, resulting in the valve disc getting stuck at a certain part of the guide rod. (3) Adhesion: It is due to the chemical and physical changes caused by the mixture of oil vapor, moisture and dust and other impurities deposited on the valve disc, valve seat and guide rod. Over time, the valve disc and valve seat or guide rod adhere together. (4) Clogging: This is mainly due to the long-term lack of maintenance and use of mechanical breathing valves, which causes dust, rust residue and other debris to accumulate inside the breathing valve or inside the breathing tube, as well as bees or birds building nests at the breathing valve opening, etc., leading to clogging of the breathing valve. (5) Freezing of the breather valve: This is due to temperature changes, where moisture in the air condenses at the valve body, valve disc, valve seat, and guide rod of the breather valve, and then freezes, making it difficult to open the valve.   2 Regularly check the contents (1) Check whether there are any phenomena such as being constantly open, air leakage, jamming, adhesion, blockage, freezing or rusting; (2) Check if the sealing gasket is leaking. If any is found, it should be replaced. (3) Check whether the valve disc can rotate flexibly and whether there is any jamming fault. (4) Check whether the valve body sealing mesh is frozen or blocked, and whether there is dust or dirt adhering to the mesh. (5) Check whether the metal parts such as the valve disc, valve seat, guide rod and air guide spring have rusted or accumulated scale. They can be cleaned with kerosene. (6) When conducting material entry and exit operations in the storage tank, check whether the breathing valve is operating normally.   3 The breather valve should be calibrated once a year on a regular basis. The calibration method shall be carried out in accordance with SY/T 0511.1-2010 "Petroleum Storage Tank Accessories - Part 1: Breather Valves".   Ii. Inspection, maintenance and regulatory requirements for breather valves of storage tanks   1 "Integrity Management of Atmospheric Pressure Storage Tanks" (GB/T37327-2019) 8.6.1 The breather valves used in atmospheric pressure storage tanks shall be inspected at least once a year. 8.6.2 The following materials should be reviewed before inspection: a) The product model and operating pressure rating of the breathing valve; b) Manufacturing date, product qualification certificate, installation date, completion acceptance document; c) Online inspection records during the operation cycle; d) Previous regular inspection reports. 8.6.3 Before inspection, the inspection items and qualification standards should be clearly defined and approved by the user unit. The user unit should make adequate preparations as required. 8.6.4 The inspection contents of the breathing valve include visual inspection, opening pressure, ventilation volume and leakage volume test, etc. 8.6.5 The appearance of the breathing valve should be free from abnormal rust, leakage and blockage by debris. 8.6.6 The opening pressure, ventilation volume and leakage volume of the breathing valve shall meet the design requirements.   2 Guidelines for the Investigation and Management of Safety Risks and Hidden Dangers in Hazardous Chemicals Enterprises (Emergency [2019] No. 78   (4) The management enterprises of static equipment shall set up safety accessories such as breather valves (hydraulic safety valves), flame arrestors, foam generators, liquid level gauges and vent pipes of storage tanks in accordance with the specifications, and conduct regular inspections or tests, and fill in the inspection and maintenance records.   3 SY 5225-2005 - Technical Regulations for Fire and Explosion Prevention and Safety Production in Oil and Gas Drilling, Development, Storage and Transportation   Article 7.4.1.1 The installation of breather valves, flame arrestors and hydraulic safety valves in oil storage tanks shall be carried out in accordance with SY/T 0511, SY/T 0512 and SY/T 0525.1 respectively. Safety valves should be inspected and calibrated by qualified inspection institutions at least once a year. Article 7.4.1.2 The base of the breather valve and the hydraulic safety valve shall be equipped with a flame arrester. The breather valve and the hydraulic safety valve shall be inspected at least twice a month in winter and calibrated once a year. The flame arrester should be inspected at least once every quarter. The breathing valve is flexible and easy to use. The oil level of the hydraulic safety valve meets the requirements and the oil quality is qualified. The flame-retardant layer of the flame arrester is in good condition and there is no phenomenon of oil sludge blockage.

In modern industrial waste gas treatment, high-temperature incineration has gradually become the mainstream, especially in the field of VOCs waste gas treatment, where its purification efficiency can reach over 99%, meeting increasingly strict environmental protection standards. Compared with traditional high-temperature incineration methods such as absorption, adsorption, condensation and biological methods, it has significant advantages.   This article will delve into the selection criteria for regenerative thermal oxidation (RTO) and direct-fired thermal oxidation (TO), and conduct a comparative analysis of domestic and international standards.   01 Process structure and exhaust gas composition: Different components require different choices   The structural differences between RTO and TO make them perform differently when treating waste gas.   The RTO furnace consists of multiple units such as exhaust gas pipelines, switching valves, insulation modules, and regenerative ceramics. It is suitable for simple organic waste gas compositions,RTO,RTO incinerators,VCU equipment, regenerative incinerators, regenerative oxidation furnaces, and rco incinerators (RTO valves). If it mainly contains components of C, H and O. In these cases, the heat recovery efficiency of RTO can significantly save energy consumption.   For complex waste gas containing corrosiveness, viscosity, heavy metals or other impurities, the TO furnace is a more ideal choice.   Its simple structure can prevent clogging, corrosion and leakage problems, so it is safer and more reliable when dealing with these high-risk waste gases.     02 Exhaust gas concentration, the balance between safety and efficiency   RTO has strict limits on the concentration of inlet exhaust gas, generally requiring it to be lower than 25% of the lower explosive limit, and the maximum inlet concentration should not exceed 8000mg/m³. This is to ensure that the system can maintain safe operation while achieving efficient purification.   In contrast, the TO furnace can handle a wider range of waste gas concentrations. Due to its single airflow design, it does not need to consider valve switching and thermal balance issues, and its purification efficiency can reach 99.5% to 99.9%, making it suitable for the treatment of high-concentration waste gas.   03 Temperature control, flexibility comparison   When the RTO system is used for high-temperature exhaust gas treatment, pretreatment measures need to be installed to lower the temperature; otherwise, it may lead to valve deformation and leakage problems.   However, the TO furnace has no such limitation. Its system structure is not sensitive to temperature changes and can maintain the outlet temperature more stably without the need for additional temperature regulation measures.   04 Energy Consumption and Economy: Efficient Recycling or Direct Utilization?   In terms of energy consumption, RTO furnaces, with their ceramic heat storage bodies, can achieve a heat recovery efficiency of 95% or more. However, such efficient recycling requires a complex system and a relatively high initial investment.   The TO furnace is relatively simple. Its waste heat recovery efficiency is usually around 70%, but part of the heat can be used for other production processes, offering high flexibility.   05 Which is faster, temperature rise or production efficiency?   RTO requires a relatively long heating time. It takes about 2 to 3 hours to heat up a cold furnace, and 1 to 1.5 hours to heat up a hot furnace.   The TO furnace, with its simple structure and high-power burner, can quickly heat up to the working temperature, saving time and improving production efficiency. This is very beneficial for production scenarios that require rapid start-up.   06 The differences in selection criteria at home and abroad, and the balance between economy and precision   When choosing RTO or TO furnaces abroad, they often pay more attention to the accuracy of data. Due TO the relatively low energy prices in Europe and America, as long as the exhaust gas contains components that are unfavorable to the RTO equipment, even if the content is small, they tend to choose the TO furnace to ensure the safety and long service life of the equipment.   In China, due to relatively high energy costs, low-energy consumption RTO equipment is more popular. Even if there are unfavorable components in the exhaust gas, enterprises usually add pretreatment processes such as acid-base neutralization, cooling, filtration and condensation, etc., to reduce the impact on the RTO. At the same time, when designing, the system margin should be enlarged to cope with the fluctuations in the volume and concentration of exhaust gas.   07 Choose to adapt to local conditions and optimize precisely   Whether it is RTO or TO, the basis for selection lies in the composition, concentration, temperature of the exhaust gas and the precision requirements of the treatment process.   There are different emphases in preferences and selection criteria for processes at home and abroad. In China, more emphasis is placed on economy and flexibility, while abroad, more attention is paid to data accuracy and system security.   Therefore, in practical applications, enterprises need to make the best choice based on specific circumstances and local regulations!

On October 14, 2024, Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, excerpted from the VOCs reduction workstation that uses a single process such as activated carbon adsorption to treat VOCs waste gas, is called a simple VOCs treatment facility. As early as 2013, the state issued technical specifications. In recent years, various regions have also successively introduced local norms or group standards. For instance, on September 30th, the Sichuan Provincial Department of Ecology and Environment released the first local technical specification/standard for the treatment of VOCs by activated carbon adsorption in China: "Technical Specification for the Treatment of Industrial Organic Waste Gas by Activated Carbon", which is currently soliciting opinions. For instance, a few months ago, the Zhongshan Environmental Science Society officially released the group standard "Technical Specifications for Activated Carbon Adsorption Devices for Organic Waste Gas Treatment". These standards all provide detailed descriptions of requirements for pretreatment, design of adsorption devices, design of adsorption units, activated carbon, construction and acceptance, operation and management, etc. Today, let's share what auxiliary facilities are used in activated carbon adsorption facilities to ensure safety and compliance?   1. A temperature and humidity meter or a temperature and humidity sensor should be installed at the front end of the air inlet of the activated carbon adsorption device to monitor whether the waste gas entering the activated carbon box meets the requirements.   2. The adsorption layer of the activated carbon adsorption device should be equipped with a differential pressure gauge or a manometer. When the pressure is lower than the initial value or reaches 1.5 to 2 times the initial value, the activated carbon should be inspected and replaced in a timely manner.   3. Sampling ports should be set up on both the intake and exhaust pipes of the activated carbon adsorption device in accordance with relevant standards, and the inlet concentration should be simultaneously detected in accordance with the self-detection plan of the pollutant discharge permit to facilitate the detection of the adsorption efficiency of activated carbon.   4. The fan should be installed at the rear end of the activated carbon adsorption VOCs device to create a negative pressure in the device and ensure that no pollution-free gas leaks out of the adsorption device as much as possible.   5. According to the characteristics of the imported exhaust gas, the activated carbon adsorption device should be equipped with safety devices such as fire dampers, flame arrestors and emergency sprinklers if there is a risk of combustion or spontaneous combustion.

Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, on October 14, 2024, excerpted from the VOCs reduction workstation VOCs treatment system. The energy consumption of the fan is a very important part, which involves the daily operation and operating costs of the VOCs treatment facilities. For a good VOCs treatment system, the selection of fans is very scientific and crucial. Of course, many enterprises currently also adopt variable frequency fans. Now let's take a look at the VOCs waste gas treatment system. How is the power of the fan generally designed and selected?   The power required by the fan in the VOCs waste gas treatment system usually needs to take into account the following key factors comprehensively   Air volume (Q) : Firstly, it is necessary to know the air volume designed for the VOCs system, that is, the volume of gas that needs to be processed per hour (m³/h or Nm³/h). When we were formulating the VOCs treatment plan in the early stage, the air volume value required for the VOCs waste gas system could be provided by the owner or calculated based on the scenarios where VOCs were collected.   Wind pressure (P) : Calculate the total pressure head (Pa or kPa) that the entire system needs to overcome based on the system design requirements, pipeline layout, and component resistance (such as pressure drop caused by filters, adsorption equipment, elbows, valves, etc.). Generally speaking, the overall pressure loss can be divided into pipeline pressure loss and equipment pressure loss (such as the pressure loss of filters and spray towers, which is usually 500-1000Pa each). It specifically depends on the design of these devices.   Fan performance curve: Refer to the performance curve graph or data sheet provided by the fan manufacturer to find the fan's working efficiency point under the corresponding air volume and air pressure. This can be achieved by asking the fan supplier of the VOCs system to provide a copy. Each brand of supplier will have a fan curve. The efficiency of a fan determines the extent to which input power is converted into output power when operating under a given air volume and air pressure.   Power calculation formula   The VOCs waste gas system basically adopts centrifugal fans. The required power can be estimated using the following simplified formula:   RTO,RTO incinerator,VCU equipment, regenerative thermal oxidizer, regenerative thermal oxidizer,rco incinerator   P represents the power of the fan (kW)   Q is the air volume (m³/h) converted to the air volume under standard conditions and then converted to the inlet state of the fan.   ΔP is the total pressure head (Pa).   K is a constant and may range from 1.0 to 1.1 depending on the country and region.   η represents the total efficiency of the fan, typically ranging from 60% to 90%, with the specific value determined by the fan's performance.   5. Detailed hydraulic calculation: For complex systems, it is usually necessary to use professional HVAC design software to conduct detailed hydraulic calculations to accurately calculate the pressure losses of all components and ensure that the fan can provide sufficient energy to drive the gas through the entire system. In our VOCs waste gas treatment system, this step is basically not used, except in VOCs treatment projects with extremely high system pressure requirements, such as the VOCs waste gas treatment in the semiconductor industry. The difficulty of VOCs treatment in this industry is not high, but some sections have very strict requirements for collection pressure. Especially in the past few years, it was also a highly profitable industry (with a lot of hot money). As a result, several VOCs enterprises that often played in this industry have achieved considerable development in their niche markets and even gone public. Therefore, choosing the right track is very important. The technology doesn't necessarily have to be outstanding; what matters most is which industry to play in and with whom. How envious others are!   6. Safety margin and frequency conversion regulation: In actual engineering design, a certain safety margin also needs to be considered to deal with the increase in pressure drop caused by possible situations such as filter material blockage and pipeline blockage. Meanwhile, the use of a frequency converter to control the fan speed can achieve real-time adjustment of the air volume, thereby saving energy. This usually reserves a coefficient of 10 to 20%.     In conclusion, accurately calculating the power of a fan usually involves a series of complex engineering calculations and performance analyses rather than simple formula applications. In the actual design of VOCs treatment engineering solutions, VOCs treatment engineers will make reasonable selections and designs based on the actual situation and experience. Generally, points 1, 2, 3 and 6 mentioned above can be considered.

Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, excerpted from the VOCs emission reduction workstation on October 21, 2024: "The temperature of combustion Chamber No. 1 is 810℃, and the temperature of the heat storage body is 760℃..." Entering the Combustion Technology and Equipment Research Center of Tsinghua University Wuxi Institute of Applied Technology, the "health" index of over 50 VOCs combustion technology treatment devices is clearly displayed on the large screen. It is learned that Wuxi has taken the lead in the country in promoting enterprises that use combustion treatment facilities to be included in the closed-loop management of standardized operation.   There are over 350 enterprises in Wuxi City that adopt combustion methods for their large emissions and high concentrations of waste gas. Wang Haiming, the chief engineer of the Wuxi Municipal Ecological Environment Bureau, introduced that these enterprises generally have problems such as non-standard operation and maintenance technical standards and incomplete supervision and management systems. The effects of waste gas treatment vary greatly, and "high-efficiency treatment facilities" can easily turn into "centralized sewage discharge facilities", which brings difficulties to supervision.   How can governance facilities be better managed? The Wuxi Municipal Ecological Environment Bureau and the Wuxi Municipal Emergency Management Bureau jointly entrusted the Tsinghua University Wuxi Applied Technology Research Institute to establish the Combustion Method Technology and Equipment Research Center, exploring new regulatory models. We fully leverage our data resource advantages. By collecting real-time operation data of the treatment facilities of key enterprises in Wuxi for waste gas treatment and applying big data analysis, artificial intelligence and other technologies, we monitor the temperature, pressure, exhaust gas concentration, total VOCs and other parameters of these devices, effectively assisting in precise regulatory measures. Liu Xinghai, deputy director of the Combustion Technology and Equipment Research Center, introduced that relying on the "one network" for online supervision, the center can assist government functional departments in providing immediate early warning and handling for emergencies such as illegal discharges, excessive discharges, and fire alarms. RTO,RTO incinerator,VCU equipment, regenerative thermal oxidizer, regenerative thermal oxidizer,rco incinerator   "Pipeline damage, inadequate safety protection measures, and the lack of dedicated management can all lead to low equipment utilization efficiency and affect the compliance of waste gas emissions." " Liu Xinghai said that the center has specially formed an expert team to issue a "physical examination report" for the enterprises under monitoring every month, providing a basis for subsequent rectification. Not long ago, the platform showed that the data of the heat storage body of a chemical enterprise in Yixing fluctuated greatly. After inspection by the expert group, it was found that the relevant components had aged and the control system also needed to be improved. Timely reminders have transformed "post-event handling" into "pre-event prevention", earning the satisfaction of enterprises. RTO,RTO incinerator,VCU equipment, regenerative thermal oxidizer, regenerative thermal oxidizer,rco incinerator   Ensuring that the equipment operates in the best condition can minimize energy consumption to the greatest extent and truly "relieve the burden" on enterprises. According to rough estimates, if the relevant indicators of a 24-hour operating regenerative thermal oxidizer (RTO) can be improved by 5%, it can save a unit over one million yuan in costs in a year. In the early stage, the expert team visited and investigated enterprises in Wuxi City that treated waste gas by combustion method, and conducted a survey of over 500 pieces of equipment. They found that the combustion thermal efficiency of many of the equipment was not high, averaging around 80%. After rectification and improvement, it can reach over 90%. An RTO device worth 3 million yuan can recoup its investment within three to four years if its operational efficiency can be effectively improved. Liu Xinghai did the math. 4.png   Understand the equipment, manage it well and use it properly. Wuxi City will lead more enterprises that treat waste gas by combustion method to join the "big family" of the central service platform with its exemplary effect, and promote the level of environmental governance to a new stage.   The approach taken by the Wuxi Ecological Environment Bureau is highly worthy of promotion and reference across the country. Besides scientific design and one-time construction to meet standards for operation, what truly reflects scientific and low-carbon development in VOCs incineration facilities is the subsequent reasonable, compliant and scientific operation and maintenance investment. However, this is currently a clear shortcoming in the entire industry, especially for "efficient" facilities such as RTO and RCO. In addition, there are a large number of so-called "catalytic incineration facilities" such as "activated carbon adsorption and desorption +CO", which are not subject to continuous health "check-ups" and are installed all at once. As a result, enterprises have not truly mastered how to keep them in the best operating condition, and regulatory authorities are also unable to control the red line safety of these incineration process equipment in real time!   The concept of an efficient VOCs treatment facility should be the one that is most suitable for the enterprise's working conditions. It is not the case that the incineration device with high initial investment and operation and maintenance costs is an efficient facility.

Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO, RCO, and VCU equipment, July 19, 2025, excerpted from the VOCs reduction workstation. The RTO system is the largest branch of the VOCs treatment industry, without any doubt. Although RTO incineration is one of the most direct and efficient treatment methods, many environmental protection manufacturing enterprises or users believe that burning RTO can solve all their problems. Little do they know that there are still many pitfalls to fall into. Today, we are going to share a few of the most common misunderstandings, just for communication. 1. Only focusing on the initial investment while neglecting the stability of operation and compliance   Misconception: "RTO is too expensive. If possible, make it cheaper. Just replace the activated carbon equipment."   Correct answer: RTO is a one-time investment with multiple years of returns. For scenarios with medium to high concentrations, large air volumes, and continuous operation of waste gas, the long-term operating cost of activated carbon is much higher than that of RTO, and the compliance is unstable. In addition, if the concentration of the incoming gas is relatively high, it is advisable to consider combining a waste heat boiler for the utilization of waste heat.       2. Do you think RTO is a "universal machine" that can handle all kinds of waste gas   Misconception: "Just apply RTO to organic waste gas without considering concentration, impurities, or moisture."   Correct answer: RTO is highly sensitive to the concentration of exhaust gas, temperature, water content, and halogenated hydrocarbons such as silicon and chlorine. If not pre-treated, it may corrode the system, clog the heat storage bed and cause malfunctions.   Pretreatment equipment (dust removal, acid removal, condensation, activated carbon/resin adsorption and desorption, etc.) must be selected based on the gas quality components.   For certain components of waste gas (such as halogenated hydrocarbons and chlorinated solvents), it is more recommended TO use TO or other processes such as deep cryogenic treatment, activated carbon/resin adsorption and desorption shallow cryogenic treatment as substitutes.       3. Neglecting the significance of "switching valves" and "automatic control systems"   Misconception: "As long as the burner is pushed into the furnace and can heat up to over 760℃, it can burn off organic matter."   correct solution: The switching valve is one of the key factors determining whether the emissions can meet the standards. As a moving device with a very high operating frequency, the switching valve is relatively more prone to failure. It is absolutely not advisable to install some switching valves that are merely roughly made of iron, with two steel plates and a private label for execution. In such cases, it will be difficult to directly identify the cause even if the standards are exceeded, especially in industries like pharmaceuticals and chemicals where the concentration of incoming gas is relatively high. The leakage of the switching valve will directly lead to the occurrence of over-standard. Furthermore, the automatic control system determines whether it operates stably. It is not the case that once the RTO burns out, everything will be settled. When the switching valve system lacks precise reversing and temperature control strategies, the system will exhibit:   VOCs emissions exceed the standard;   Frequent ignition and high gas consumption;   The lifespan of the equipment has been shortened.   Waste Gas Treatment, RTO, CO

Recently, Wuxi Zechuan Environmental Technology Co., Ltd. (hereinafter referred to as "Wuxi Zechuan") announced exciting news - the waste gas treatment system project it undertook for a well-known UK pharmaceutical enterprise has been officially handed over. All environmental protection indicators are superior to EU standards, marking that China's environmental protection technologies and services have gained high recognition in the high-end European market and set a new benchmark for the international development of the industry. As a technology-innovative enterprise supported by the research strength of Tongji University, the UK pharmaceutical enterprise served by Wuxi Zechuan this time is a leader in the global pharmaceutical field. The waste gas generated during its production process has complex components and strict treatment requirements, posing extremely high standards for the stability and accuracy of environmental protection systems. Since the project was launched, it has attracted the participation of many environmental protection enterprises worldwide in the competition. "The key to standing out in the international competition lies in that our technical solution not only conforms to the production characteristics of pharmaceutical enterprises but also achieves a balance between environmental benefits and operational efficiency," said the project manager of Wuxi Zechuan. Aiming at the characteristics of volatile organic compounds (VOCs) in the waste gas of pharmaceutical enterprises, such as large concentration fluctuations and complex components, the company set up a special technical team. Combining years of experience in industrial waste gas treatment, the team customized an integrated solution centered on RTO (Regenerative Thermal Oxidation) technology. To meet local environmental protection regulations in the UK and the production needs of the pharmaceutical enterprise, the project team carried out multiple rounds of technical communication with the UK side during the equipment R&D phase, and optimized the heat recovery system and intelligent control system of the equipment. As a result, the waste gas treatment efficiency has been increased to over 99.5%, and the heat recovery efficiency exceeds 95%. This not only meets the latest EU environmental protection emission standards but also helps the pharmaceutical enterprise reduce energy consumption costs. During the construction process, through modular prefabrication and refined management, the project completed installation and commissioning two weeks ahead of schedule, winning high praise from the UK partner. "The solution provided by Wuxi Zechuan is not only advanced in technology but also demonstrates excellent project execution capability," said the Global Operations Director of the UK pharmaceutical enterprise at the handover ceremony. During the trial operation of the project, the environmental protection system still maintained stable operation under extreme working conditions, with real-time and accurate data monitoring, providing a reliable guarantee for the enterprise to achieve green production. The enterprise will consider deepening long-term cooperation with Wuxi Zechuan in the environmental protection field in the future. The successful handover of this project is an important breakthrough in Wuxi Zechuan's internationalization strategy, and also confirms the transformation effect of China's environmental protection industry from single equipment export to "technology + service" integrated solution export. Supported by the scientific research of Tongji University, Wuxi Zechuan has accumulated rich technical achievements in the fields of industrial waste gas treatment and solid waste resource utilization in recent years. Its entry into the European market this time has laid a solid foundation for the subsequent expansion of global business. "China's environmental protection technologies have possessed the strength to compete in the global high-end market," said the General Manager of Wuxi Zechuan. The company will take this project as an opportunity to further increase R&D investment, focus on the environmental protection needs of high-end manufacturing fields such as pharmaceuticals and chemicals, and create more international environmental protection benchmark projects. At the same time, it will actively learn from the experience of overseas projects, promote localized technological innovation and global application, and contribute Chinese wisdom and solutions to the global green and low-carbon transformation. Currently, Chinese environmental protection enterprises are accelerating their pace of "going global" and playing an increasingly important role in global environmental governance. The success of Wuxi Zechuan's UK project this time is not only a milestone in the company's own development but also highlights the international competitiveness of China's environmental protection technologies and services, injecting new impetus into the international development of the industry.

Wuxi Zechuan Environment, a professional manufacturer of RTO incinerators, RTO and RCO, February 26, 2024 - On February 21, 2024, the Jiangsu Provincial Market Supervision and Administration Bureau approved and released a number of local standards, among which It contains the release of "Safety Technical Requirements for Regenerative Thermal Oxidizer Systems" (DB32/T 4700-2024). The root According to the standard requirements, this requirement shall come into effect from March 5th. This document stipulates the design and installation of the RTO system Safety technical requirements for installation and acceptance, operation, maintenance and emergency response. Applicable to the new RTO system Construction, renovation and expansion projects.   Waste Gas Treatment, RTO, CO