Air pollution control equipment refers to a series of control equipment used to deal with air pollution and improve the environment, including dust removal equipment, gaseous pollutant control equipment, air collection hoods, and piping systems.
Air pollution control is a pollutant emission control technology and pollutant emission control policy adopted to pay for air pollutants. The special gas pollutants emitted by various industries can be easily solved by changing the production process or even closing or relocating factories. At present, the primary air pollutants are the soot, carbon dioxide, and sulfide produced by burning fossil fuels, as well as carbon monoxide, hydrocarbons, and nitrogen oxides emitted from automobile exhaust.
The control of industrial air pollutants is the main thing. Still, the air pollution caused by domestic fuels is common, especially the coal-burning pollution used for heating in every household is difficult to deal with, and only centralized heating and changing coal-burning can be used. To reduce pollutant emissions by means of gas, central heating requires a large investment and must be based on economic development.
Dust removal equipment
Dust removal equipment mainly filters the dust and particulate waste gas in the air. Commonly used equipment in the market are:
Controlling device
Air pollution control equipment can treat gaseous pollutants such as SO2, NOx, H2S, HF, and VOCs (volatile organic compounds) in exhaust gas through adsorption, absorption, purification, and other methods. Commonly used equipment are:
The selection of air pollution control equipment needs to be judged according to different types of industries and types of exhaust gas. You can also seek the help of a professional waste gas treatment company. The professional waste gas treatment company will customize a complete waste gas purification plan for the enterprise based on various considerations.
Working principles
1) The working principle of the most commonly used industrial wet scrubber is countercurrent spraying: acid or alkaline acid mist exhaust gas is introduced into the purification tower through the air duct, and the exhaust gas is fed from the bottom of the tower through the packing layer. continuous through the voids of the packing layer. On the surface of the packing, the gas-liquid two phases fully contact, absorb and neutralize the reaction, and adsorb the acidic or basic pollutants contained in the exhaust gas.
After the acid mist exhaust gas is purified, the clean gas is dehydrated and demisted by the defogging plate and then discharged into the atmosphere by the fan.
Insoluble viscose particles and dust are poured into the collection tank, suspended particles are discharged from the overflow outlet, and the collected sediment is discharged from the sewage outlet. The absorption liquid is pressurized by the water pump at the bottom of the tower and sprayed downward from the top of the tower, and finally refluxed to the bottom of the tower for recycling.
2)Box-type waste gas treatment equipment is often used in granular activated carbon adsorption treatment so that gas flow is generally carried out through an activated carbon adsorption layer. According to the state of the activated carbon adsorption layer in the adsorption device, the adsorption layer has a fixed layer, a moving layer, and a fluid layer. Adsorption refers to the effect of liquid or gas adhesion on the surface of activated carbon.
Activated carbon is a kind of porous carbon-containing substance. It has a highly developed pore structure. The porous structure of activated carbon provides it with a large amount of surface area and can fully contact with gas (impurity), thus giving activated carbon its unique adsorption performance. It is very easy to achieve the purpose of absorbing and collecting impurities. Just like magnetism, all molecules have a mutual attraction. Because of this, a large number of molecules on the pore wall of activated carbon can generate a strong attraction, so as to achieve the purpose of attracting harmful impurities into the pore. Adsorption is different from assimilation. Assimilation refers to letting liquid or gas into the internal atomic structure of a solid, but activated carbon does not have this ability. Its adsorption is only a surface phenomenon, so it only occurs on its surface.
