Coal-charging and coke-discharging flue gas integration dust-removal process for side coal-charging coke oven

Abstract

The invention relates to a coal-charging and coke-discharging flue gas integration dust-removal process for a side coal-charging coke oven. A two-way connector valve is arranged on an oven column for the coke oven, the flue gas generated during the coal charging process of the coke oven and the flue gas generated during the coke discharging process of the coke oven enter in a common flue gas pipeline respectively through the two-way connector valve, and the dust removal is performed through a filtering type flue gas dust-removal device connected with the flue gas pipeline; the tar adsorption adopts a method that active powder adsorbent is sprayed in the flue gas pipeline, and the flue gas is discharged into atmosphere through a ventilator after being filtered and purified in a filtering type flue gas purification device; and the filtering type flue gas purification device performs off-line dust-cleaning regeneration after finishing coke discharging until the next coke discharging of the coke oven. No dust deposits in the process pipeline, the tar adsorption is complete, the dew point is not reached, the filter bag dust-cleaning regeneration is good, and the system is reliable and stable, thereby effectively ensuring the normal running of the coke oven with flue gas dust removal.

Description

technical field [0001] The invention relates to a dedusting process for coal charging and coke discharge in a coke oven, in particular to a combined dedusting process for coal charging and coke discharge in a side-loaded coke oven. Background technique [0002] At present, the domestic side-loading coal coke oven adopts the coke oven coal-charging and coke-out flue gas dust removal process, which has the following problems: [0003] 1. The coke oven dust removal and coal charging dust removal use their own flue gas interface valves respectively, which makes the environmental protection investment remain high, of which the civil engineering cost for the installation of the flue gas interface valves only accounts for about 3 million yuan; [0004] 2. The current method of pre-spraying powder on the filter bag makes the pre-sprayed active powder not fully utilized, and the tar in the flue gas is not highly adsorbed by the active powder, resulting in the filter bag of the filter...

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Problems solved by technology

[0004] 2. The current method of pre-spraying powder on the filter bag makes the pre-sprayed active powder not fully utilized, and the tar in the flue gas is not highly adsorbed by the active powder, resulting in the filter bag of the filter-type flue gas dust removal equipment being bonded by tar, so that the filter The resistance of the bag to the fluid is too large, the coke oven dust removal system has a reduced ability to collect the flue gas from coal charging and coke discharge, and cannot operate normally;

Since the flue gas volume of coke oven charging and dust removal is several times smaller than that of coke oven discharge dust removal, dust deposits in the pipes shared by coke oven coal charging and dust removal;

[0006] 4. The current method of pre-spraying powder on the filter bag to absorb tar in the flue gas, in order to make the active powder pre-sprayed on the filter bag can absorb the tar in the coal-loading flue gas, the filter bag of the filter type flue gas dust removal equipment is cleaned, The regeneration process can only be carried out after coking out of the coke oven and coal charging

After they enter the flue gas cooler, they reach the dew point. The water continuously binds the dust in the flue gas, causing the flue gas cooler to be blocked, and it will cost hundreds of thousands of yuan to replace the flue gas cooling equipment.

[0008] In view of the above reasons, none of the side-loading coal coke ovens that cost nearly 20 million yuan to put into operation in China have been able to operate stably for more than three months.

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