Pollution control device for preventing harmful gas from being short circuited

Abstract

The invention discloses a pollution control method for preventing short circuit caused by harmful gas. The method comprises the steps as follows: suction cover openings are arranged at the position of each organic solvent gas pollution source, the total pressure difference between the insides of suction covers and the outsides of the suction covers is larger than 50Pa by controlling the powers of suction fans, the organic solvent polluted gas collected by the suction fans enters an activated carbon absorber 1, the absorbed harmful gas is discharged by a pipeline; hot air enters the activated carbon absorber 1 to carry out the desorption to activated carbon, the desorbed gas enters a low-temperature incinerator to carry out the low-temperature incineration of lower than 700 degrees under the action of a non-precious metal catalyst, and the emission of the gas can achieve the standards. The pollution control method arranges one active fan at each suction opening, thereby effectively ensuring each air opening to have sufficient suction force to suck and emit the gas of the pollution sources. The harmful gas absorbed by the fans can be directly absorbed by the activated carbon, thereby eliminating the water washing process of the prior art and more effectively improving the absorption capacity of the activated carbon.

Description

technical field [0001] The invention relates to the emission control of polluted gas, in particular to a pollution control method for preventing harmful gas from short-circuiting, which can be used for pollution control in chemical plant production workshops and laboratories. Background technique [0002] Existing technologies for the treatment of harmful polluting gases such as figure 1 As shown, the usual process is: multiple pollution sources → multiple suction outlets → centralized air duct → water shower cleaning → activated carbon adsorption → fan → emptying. Specifically, the gases from multiple pollution sources pass through the suction hood openings 1 of multiple suction ports, and then are sent to the water shower cleaning device 4 by the centralized air duct. Machine 2. There are following problems in this technical process: (1) the more sources of pollution, the more air suction ports, and the more chances of gas short-circuiting. Gas short-circuit means that ...

AI Technical Summary

Problems solved by technology

This technical process has the following problems: (1) The more sources of pollution, the more air suction ports, and the more chances of gas short-circuiting

Gas short-circuit means that because multiple suction ports are connected in parallel and then sucked by one exhaust fan, the displacement of polluted gas at each parallel suction port is different, and the resistance to suction is different, making the wind force of each suction port uncontrollable. It is possible to artificially balance and adjust the wind force of the suction port, but a slight change in a certain link during the production process will cause the entire system to lose balance, making some suction ports unable to suck air, and the expected pollution control effect cannot be achieved

(2) The effect of water emulsification cleaning is not great, organic solvent gas is difficult to miscible with water and the mass transfer exchange coefficient is very low

(3) Since the previous stage is the process of water emulsification and cleaning, the moisture content of the gas is very high, and the gas with high moisture content enters the activated carbon for adsorption, which greatly affects the adsorption capacity of the activated carbon

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