Wet coke-quenching aerial fog processing method and device based on non-thermal plasma injection

Abstract

The invention discloses a method and a device for processing wet quenching coke gas fog on the basis of athermal plasma injection. The method comprises the following steps that: in the ascending process, the hot gas fog generated by wet quenching coke sequentially passes through three processing steps including spray cooling, pre-dedusting on a baffle plate and athermal plasma purification, and is cooled in a spray cooling area; the cooled gas fog enters a pre-dedusting area on the baffle plate where the thicker and bigger water particles and coke powder in the gas fog are separated from the gas fog and impact to the baffle plate under the action of inertia; the remaining gas fog continues to ascend and enter an athermal plasma purification area where organic components, ammonia nitrogen and cyanide in the gas fog are oxidized by the athermal plasma; the water particles and the coke powder are charged and are transferred to a trapping pole plate directionally under the action of a high voltage electric field; and then the gas flow after subjected to the athermal plasma purification area continuous to ascend to the top of a coke quenching tower to be discharged. After the processing steps, the contents of water vapor and the coke powder discharged outside after one ton of coke is produced are controlled to be less than 0.05 ton and 5 grams respectively, and the removal rate of the organic components, the ammonia nitrogen and the cyanide can reach more than 80 percent.

Description

technical field [0001] The invention relates to a method and a device for purifying harmful components in gas mist by using non-thermal plasma with oxidation activity and a high-voltage electric field, and separating and recovering aerosol particles, belonging to the field of energy saving and environmental protection. The method and equipment are especially suitable for purifying pollutants such as polycyclic aromatic hydrocarbons, volatile phenols, cyanides and ammonia nitrogen compounds in the aerosol generated by wet coke quenching, and separating and recovering steam and coke powder. Background technique [0002] In the coking process, after the red coke is pushed out from the coke oven, it must be cooled and quenched in time to prevent it from being oxidized and burned in the atmosphere. At present, coking enterprises mostly adopt wet coke quenching. The working process is that after the red coke is pushed from the coke oven into the coke car, it is pulled by the locom...

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Problems solved by technology

[0005] The present invention provides a wet coke quenching tower for the lack of effective purification of pollutants such as polycyclic aromatic hydrocarbons, volatile phenols, ammonia nitrogen and cyanide in the existing wet coke quenching tower, and the low efficiency of separation and recovery of steam and coke powder. Gas mist purification and steam, coke powder recovery method and device

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