I. Product Overview
Low-temperature plasma waste gas treatment equipment is an advanced device for purifying waste gas. It mainly consists of a power supply, electrodes, a reaction chamber, a gas delivery system, and a control system. It adopts low-temperature plasma technology. Under the action of an externally applied electric field, gas molecules in the waste gas are ionized, generating a large number of highly active ions, electrons, free radicals, and excited state molecules and other active particles. These active particles will undergo a series of complex physical and chemical reactions with pollutants in the waste gas, thus decomposing and converting the pollutants into harmless or less harmful substances to achieve the purpose of purifying the waste gas.
The overall structure of this equipment is compact. It can be flexibly designed and customized according to different treatment air volumes and site requirements. It is convenient to install and occupies a relatively small area. Its outer shell usually adopts high-quality stainless steel or carbon steel materials, which have good corrosion resistance and can adapt to a variety of complex industrial environments. It has broad application prospects in waste gas treatment in many industries such as chemical engineering, printing, coating, electronics, and pharmaceuticals.
II. Working Principle
Gas Ionization Process: When the waste gas enters the reaction chamber of the equipment, under the action of the high-strength electric field generated by the high-voltage power supply, gas molecules are ionized. Originally electrically neutral molecules will lose or gain electrons and then form a large number of plasmas. These plasmas contain positive ions, negative ions, electrons, and various active free radicals, such as oxygen free radicals (·O), hydrogen free radicals (·H), etc. They have extremely high chemical activity and can react strongly with pollutant molecules in the waste gas.
Chemical Reaction Stage: The generated active particles will collide and combine with pollutants such as volatile organic compounds (VOCs), malodorous substances (such as hydrogen sulfide, ammonia, mercaptans, etc.), nitrogen oxides, and particulate matter in the waste gas. Through various chemical reaction methods such as oxidation, reduction, cracking, and polymerization, the chemical bonds of pollutant molecules are broken, and their structures are destroyed, gradually transforming them into small molecule substances that are harmless or less harmful, such as carbon dioxide, water, and nitrogen. For example, for waste gas containing benzene series compounds, active particles can break the chemical bonds on the benzene ring and finally decompose them into carbon dioxide and water. For malodorous gases such as hydrogen sulfide, they can be oxidized to form sulfate ions, etc., thereby achieving the effect of removing odors.
III. Main Performance
High-efficiency Purification Ability: It has a significant purification effect on many common waste gas pollutants. The removal efficiency for volatile organic compounds (VOCs) can reach more than 80% - 95%, and the removal rate for malodorous substances can reach more than 90%. It can effectively reduce the pollutant concentration in the waste gas, enabling it to meet the increasingly strict environmental protection emission standards and improving the air quality of the surrounding environment.
Wide Applicability: It can handle waste gas with different components, different concentrations, and different air volumes. Whether it is high-concentration chemical waste gas, low-concentration but pungent printing waste gas, or waste gas with complex components in the electronics industry, it can perform effective purification treatment. It also has good adaptability to different environmental conditions such as temperature and humidity.
Low Operating Cost: The energy consumption of the equipment is relatively low, mainly consuming electrical energy. When processing a certain amount of waste gas, compared with some traditional waste gas treatment methods, such as the combustion method, its power consumption is small. Moreover, it does not need to add a large amount of chemical agents for the reaction, and the maintenance cost during daily operation is not high. Only regular inspections and simple maintenance of key components such as electrodes are required.
No Secondary Pollution: The entire waste gas treatment process converts pollutants into harmless substances through physical and chemical reactions and will not produce new pollutants, avoiding secondary pollution problems such as waste residue and waste water that may occur in traditional treatment methods, achieving the goal of green and environmentally friendly waste gas purification.
IV. Specific Applications in Different Industries
Chemical Industry
During the chemical production process, a large amount of waste gas containing various organic compounds, sulfides, etc. will be generated. These waste gases often have toxicity, corrosiveness, and a strong pungent odor. The low-temperature plasma waste gas treatment equipment can be installed at the tail gas discharge port of the chemical workshop to effectively handle pollutants such as toluene, xylene, and hydrogen sulfide, preventing them from being discharged into the atmosphere and causing harm to the environment and human health, and ensuring the green and environmentally friendly operation of chemical production.
Printing Industry
During the printing process, the inks and solvents used will volatilize and generate waste gas containing volatile organic compounds (VOCs). The odor is obvious and has a great impact on air quality. This equipment can accurately decompose these organic waste gas components, remove the pungent odor in the printing workshop, improve the working environment of workers, and also enable the enterprise's waste gas emissions to meet environmental protection requirements, avoiding environmental protection penalties due to excessive waste gas emissions.
Coating Industry
In the coating processes of automobiles, furniture, and other products, processes such as painting and baking will generate a large amount of waste gas containing paint mist and organic solvents. The low-temperature plasma waste gas treatment equipment uses its powerful purification function to decompose the organic substances in these waste gases, and the paint mist particles will agglomerate and settle, reducing the pollutant content in the waste gas and reducing the pollution to the surrounding atmospheric environment, which helps coating enterprises achieve sustainable development.
Electronics Industry
During the electronic production process, processes such as circuit board cleaning and chip manufacturing will generate waste gas with complex components such as fluorides and organic waste gas. With its wide applicability, this equipment can handle waste gas with these special components, ensuring the air quality in the production workshop of electronic enterprises, meeting the strict requirements of the electronic precision manufacturing environment, and also complying with environmental protection emission specifications.
V. Application Cases
Waste Gas Treatment in a Chemical Enterprise
A large chemical enterprise mainly produces various organic chemical raw materials. During the production process, the waste gas generated has a complex composition, including multiple pollutants such as benzene, toluene, and hydrogen sulfide, and the waste gas emission volume is large. The pungent odor seriously affects the lives of surrounding residents, and the enterprise has been ordered to rectify by the environmental protection department many times. After installing the low-temperature plasma waste gas treatment equipment, it was debugged and operated reasonably according to the actual waste gas air volume and composition. After a period of operation and monitoring, it was found that the removal efficiency of the main pollutants in the waste gas reached more than 90%. The pungent odor around the factory area was significantly reduced, and the air quality was significantly improved. The enterprise successfully passed the acceptance of the environmental protection department, solved the long-term environmental protection problem that had troubled the enterprise, and also improved its relationship with the surrounding residents.
Air Purification in a Printing Enterprise Workshop
A printing enterprise had a pungent odor in the workshop due to the organic waste gas volatilized from the inks during the printing production process. Workers were prone to symptoms such as dizziness and nausea after working for a long time, and the enterprise was facing the risk of excessive waste gas emissions. After introducing the low-temperature plasma waste gas treatment equipment, the removal efficiency of VOCs in the workshop reached about 85%. The air in the workshop became fresh, the working environment of workers was greatly improved, work efficiency was improved, and the enterprise's waste gas emissions also met the local environmental protection standards, avoiding economic losses caused by environmental protection issues.
Waste Gas Treatment in an Automobile Coating Workshop
The painting process in the coating workshop of an automobile manufacturing enterprise generated a large amount of waste gas containing paint mist and organic solvents. Although some simple treatment measures had been taken before, the effect was not satisfactory, and a large amount of pollutants were still discharged into the atmosphere. After installing the low-temperature plasma waste gas treatment equipment, the paint mist was effectively agglomerated and settled, and the organic solvents and other organic waste gas were decomposed and converted. The pollutant content in the waste gas was significantly reduced, meeting the environmental protection emission requirements, and the air quality outside the workshop was also significantly improved, laying a good foundation for the green production of the enterprise.
In conclusion, the low-temperature plasma waste gas treatment equipment, with its unique working principle, excellent performance characteristics, and wide application effects, is playing an increasingly important role in waste gas treatment in many industries and is a powerful guarantee for achieving industrial green development and improving the quality of the atmospheric environment.
