Of exhaust gas treatment equipment is to separate the pollutants in the gas and convert them into harmless substances in order to purify the gas. It belongs to the differential contact countercurrent type, the filling material in the tower body is the basic component of the two-phase contact of the gas liquid. When the gas outside the tower enters the tower, Gas into the filler layer, the filler layer from the top of the spray liquid and the front spray liquid, and the formation of a layer of liquid film on the filler, gas flow through the filler gap, contact with the filler liquid film and absorption or neutral reaction, the filler layer can provide a large enough surface area, the flow of gas does not cause excessive resistance, after absorption or neutralized gas by the demister collection, through the air outlet outside the tower. Absorbent is the main medium for the treatment of exhaust gases, its nature and concentration are selected according to the nature of different exhaust gases, and the consumption of treated unit gases is determined by calculating the ratio of the molar flow of the absorbent to the inert gas. The exhaust gas is drawn from the fan from the duct and passes through the filling layer from the bottom up, and the circulating absorbent is sprayed evenly into the filler layer by the top of the tower through the liquid distributor, flowing down the surface of the filler layer and into the circulating water tank. As the upflow and the decreasing absorbent are constantly in contact in the filler, the concentration of fluid in the rising air flow is getting lower and lower, and the emission requirements are met by reaching the top of the tower. The liquid on the liquid film flows into the reservoir under gravity and is pumped out by the circulating pump.

The calculation of the evaporation of liquid (except water) This calculation method is applicable to the calculation of acid evaporation in the acid washing process such as sulfuric acid, nitric acid, hydrochloric acid, etc., and the calculation formula is as follows: GZ-M (0.000 352-0.000 768V)P.F in formula, GZ - liquid evaporation,kg/h;

M- liquid molecular weight; V - evaporation liquid surface air flow rate, m/s, based on measured data, unconditional measurement, generally desirable 0.2-0.5;

Table 1-1 of the Manual of Environmental Statistics

Table 1-2 of the manual of environmental statistics