At present, there are many waste gas treatment methods in China. The selection of waste gas treatment methods must be based on factors such as air volume, waste gas composition category and waste gas concentration under different working conditions, such as high-concentration inorganic waste gas, high-concentration organic waste gas, high-concentration dusty organic waste gas, high-concentration wet steam inorganic waste gas and high-concentration wet steam organic waste gas. Generally, high-dust waste gas must be dedusted before entering the core waste gas treatment equipment. Therefore, it is generally necessary to add dust collectors, such as bag filters and electrostatic precipitators. If the waste gas contains acid-base gas, the spray absorption tower can also be filled with spray absorption liquid, and the circulating water pump can be used to wash and spray repeatedly to remove acid-base waste gas and a lot of dust. Of course, it is best to install a spray nozzle in the spray tower to spray the spray liquid in a mist form so that it can fully contact with the waste gas, thus greatly improving the absorption effect of acid-base waste gas. If it is high-temperature waste gas, the spray liquid also has the function of cooling, which provides a clean reaction environment for the core equipment to treat organic waste gas and has stable performance. Therefore, the pretreatment of waste gas is the first choice for waste gas treatment effect. Therefore, the general acid-base waste gas is treated by spray absorption method, and the size or number of spray towers can be increased or decreased according to the air volume and waste gas concentration. Various waste gas treatment methods and schemes For organic waste gas with stable chemical properties, the commonly used methods at present include: essence masking method, activated carbon adsorption method, photo-oxidation catalysis method, low-temperature plasma waste gas treatment method, combustion method, etc. The author recommends the low-temperature plasma waste gas treatment method, which is also a waste gas treatment method rising in China in recent years. Compared with several traditional waste gas treatment methods, it has more advantages and better waste gas treatment effect. The initial investment cost of equipment is slightly higher than others, but the equipment is stable, easy to operate, low in operating cost and long in service life. The most prominent advantage is that the efficiency of purifying waste gas is high, which can meet the national emission standards and fundamentally solve the problem of waste gas treatment in enterprises.