What are the treatment methods for industrial waste gas?

Common methods of industrial waste gas treatment are biodegradable, activated carbon adsorption, plasma, plant spray liquid deodorization and UV photolysis purification method.
1 microbial decomposition method
Biodegradation method is the use of circulating water to the odor of pollutants in the water in the water, and then cultured by the water culture of microorganisms, the water pollutants degraded into low-quality substances, deodorant efficiency of up to 70%, but affected by microbial activity , To cultivate the microorganisms can only deal with one or several similar nature of the gas, in order to improve the efficiency and stable operation, must be frequently added pharmaceuticals, control PH value, temperature, etc., so that the operating costs are relatively high, more artificial input , And once the death of the creature will take a long time to re-culture.
2 Activated carbon adsorption method
Activated carbon adsorption method is the use of activated carbon internal structure of the gap, a huge surface area of the principle of adsorption to the activated carbon pool through the odor of exhaust gas molecules, the initial treatment efficiency of up to 65%, but easy to saturation, usually a few days that failure, And the need to find the disposal of waste activated carbon, operating and maintenance costs are high, suitable for low concentrations, large air volume of gas, alcohol, fat effect is more obvious, but the humidity of the exhaust effect is not obvious, and easily lead to environmental secondary Pollution.
3 plasma method
Plasma method is the use of high-voltage electrode to launch ions and electrons, destruction of the structure of the principle of malodor, bombardment of odor in the deodorant molecules, thereby cracking the stench molecules, the low concentration of malodorous gas purification effect is obvious, in normal operation can reach 80% Can handle a variety of odor full of mixed gas composition, free from the impact of humidity, and no secondary pollution; but the electricity consumption, and also need to clean, high maintenance costs, high concentrations of flammable and explosive gas Easy to cause an explosion.
4 plant spray liquid deodorant method
Plant spray liquid deodorization method is to produce a malodorous gas by spraying the plant extract will be stench gas to neutralize and absorb, to achieve the purpose of deodorization, deodorant effect of low concentration can reach 50%, different odor selection of different spray Liquid, often need to add plant spraying liquid, and the need to maintain equipment, operation and maintenance costs are high, easy to cause secondary pollution.
5 UV photolysis purification method
UV photolysis purification method using high-energy UV ultraviolet light, in the photolysis purification equipment, the decomposition of oxidative odor material molecular chain, change the material structure, the polymer pollutants cracking, oxidation of low molecular weight-free substances, the deodorization efficiency of 99% (GB14554-93), can deal with ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, benzene, styrene, carbon disulfide, trimethylamine, dimethyl disulfide High concentration of mixed gas, the internal light source can be used for three years, the equipment life of more than 10 years, the purification technology is reliable and very stable, clean equipment without routine maintenance, just turn on the power can be used normally, and low operating costs, Secondary pollution.
Scope: food processing plants, meat processing plants, slaughterhouses, poultry feed yards, paper mills, sewage treatment plants, garbage transfer stations, manure and other organic and inorganic odor of deodorant gas purification treatment. Refinery, rubber plant, tanneries, printing plants, chemical plants, Chinese and Western pharmaceutical companies, metal foundry, plastic recycling plant, spraying solvents and other organic and inorganic odor of gas purification treatment.