Plastic flue gas treatment technology

Plastic flue gas treatment technology

China's research on plastic flue gas purification technology started relatively late,currently,Although the application of various purification technologies,There are many types,But overall,All are in the initial stage of use or development,Urgent need to be improved and enhanced. At present, the main types of applications in China are:

1Wet purification device

This device is designed to reverse the flow of organic waste gas through a spray water packed tower,Condense and aggregate plasticizer aerosols,Perform separation and purification. This device has a simple structure, low investment, and fast deployment,Mainly used for enterprises with small exhaust volume. Wet purification equipment has a certain effect on removing odors from exhaust gas,The efficiency of defogging and purification is very low,Other purification methods must be added to complement it,To improve purification efficiency.

2Static compensation mixed fog technology

Electrostatic dehazing technology is an early developed plastic waste gas purification technology in China,And it is widely used in artificial leather production plants. Electrostatic defogging technology can purify various aerosol particles with a wide range of particle sizes,High purification efficiency,Low energy consumption,Can effectively recover plasticizers from exhaust gas,Turning waste into treasure.

Due to the incomplete design and supporting facilities of electrostatic defogging and purification devices currently produced in China,Therefore, there are obvious deficiencies in operation, maintenance, and safety production,main issue①Lack of complete cooling and pre-treatment facilities. Mixing solid dust and high-temperature, high concentration plastic waste gas in an electrostatic field,Accompanied by adsorption and aggregation on the electrode,Form a large amount of viscous oil stains,The purification efficiency and operational stability of the purification device are affected, and voltage discharge and high-temperature flammable organic gases exceeding the limit range can easily cause combustion and explosion accidents.②Lack of efficient electrode cleaning facilities,Adopting the current water gun cleaning method,High labor intensity, harsh operating environment, and poor cleaning effect,Cannot effectively ensure the cleanliness of the electrode. Therefore,Domestic electrostatic defogging facilities should be further improved and perfected on the current basis.

3Catalytic combustion purification technology

Catalytic combustion purification technology utilizes the catalytic effect of catalysts,Oxidation and decomposition of organic waste gas at a certain temperature,Becoming harmless gas emissions such as water and carbon dioxide. The catalytic combustion purification device has strict requirements for catalytic reaction conditions,The reaction needs to be maintained within a stable temperature range, such as changes in process conditions, organic gas content, and composition during the production process,Timely adjustment of catalytic process is required,Bring the reaction to a new equilibrium,Improper control can lead to“purify”efficiency decrease,Even causing catalyst damage“poisoning”,reactor“coking”Currently, remote purification devices are being used in plastic additives’The industry has not yet successfully operated,Under testing,Commonly used for exhaust gas purification in wire processing, printing, and iron printing industries.

In summary,Plastic flue gas purification technology is still in the research and development stage in China,Filtration purification technology, as a widely adaptable approach,Simple construction,Safe and easy operation and maintenance,High purification efficiency,The plastic waste gas purification technology with good economic benefits for recycling is a technology worth promoting vigorously. currently,The research and application of plastic waste gas filtration and purification technology have made breakthrough progress in Northeast and Central China,The purification processing capacity is.“The complete set of plastic waste gas purification and treatment equipment has been officially appraised and accepted in Yichang City, Hubei Province,This has opened up a new way to solve the problem of waste gas pollution in China's plastic processing industry.