Technology for performing cold blast electrical precipitating in coal production

[0007] Examples:

[0008] Based on the process of realizing cold drum electric capture in coal production, the gas indirect tube-type primary cooling process is adopted, that is, raw gas from the coke oven, along with tar and ammonia water, is taken to the gas-liquid separator along the gas-liquid separator, in the gas-liquid separator The separated liquid flows into the mechanized ammonia clarification tank for separation. After the separated ammonia enters the circulating ammonia tank, a part of the separated ammonia is sent to the coke oven bridge pipe and gas collecting pipe as circulating ammonia, sprayed to condense and cool raw gas, and the rest is sent to the ammonia distillation unit as the remaining ammonia After the treatment, the phenol cyanide wastewater is sent to the sewage treatment station for biochemical treatment after reaching the standard for reuse. It shall not be directly discharged. The separated tar enters the tar storage tank and is left to stand for dehydration before being exported (the separated water produced by the tar standing for dehydration is also sent to the mechanized ammonia Clarification tank); the tar residue settled at the bottom of the mechanized ammonia clarification tank is discharged to the tar residue truck and sent to the coal preparation regularly. After gas-liquid separation, the raw gas comes out of the upper part of the gas-liquid separator and enters the horizontal tube primary cooler, where it is initially cooled in the horizontal tube After being indirectly cooled by water in two stages, the device enters the electric tar catcher to remove the tar mist, and then is sent to the desulfurization section by the gas blower. The primary cooler condenses ammonia and tar, and the tar collected by the electric tar catcher is sent to the mechanized ammonia water. In the clarification tank, the exhaust gas from each storage tank in this section is washed by ammonia distillation wastewater and discharged into the atmosphere through the exhaust cleaning tower. The phenol cyanide wastewater is sent to the sewage treatment station for biochemical treatment and reused in the quenching section.

[0009] The process can effectively purify the coal gas, so that the content of impurities is low, the resulting coal gas produces less harmful substances during subsequent combustion, and has low environmental pollution. It improves the competitiveness of enterprises and solves the purification of existing coal gas. In the process, its purification efficiency is low, and it contains many impurities, which causes high cost and serious pollution, which is not conducive to the development of the enterprise.