Coke oven coaling flue gas purification system and method

Abstract

The invention relates to a coke oven coaling flue gas purification system and method. The coke oven coaling flue gas purification system comprises a coaling dust removal device, a flue gas heat exchanger, an adsorption purification device, a regeneration heater and a sulfur recovery device, wherein a gas inlet of the coaling dust removal device is connected with a coaling hole of a coke oven; a gas outlet of the coaling dust removal device is connected with a gas inlet of the flue gas heat exchanger; a first gas outlet of the flue gas heat exchanger is connected with a gas inlet of the adsorption purification device; a second gas outlet of the flue gas heat exchanger is connected with a gas inlet of the regeneration heater; a gas outlet of the regeneration heater is connected with the gasinlet of the adsorption purification device; a gas return port of the adsorption purification device is connected with a gas inlet of the flue gas heat exchanger; and a gas outlet of the adsorption purification device is connected with a gas inlet of the sulfur recovery device. The technical problems that in the coke oven coaling process, the system operation stability is poor, and the purification effect of pollutants such as sulfide is poor are solved.

Description

technical field [0001] The invention relates to the field of flue gas treatment, in particular to a system and method for purifying flue gas from coke oven coal charging. Background technique [0002] With the rapid development of the steel industry, the consumption of coking coal has increased significantly. A large amount of sulfur dioxide and soot generated during the coking process have become an important source of air pollution. During the coal charging operation of the coke oven, a large amount of flue gas will escape from the coal charging hole, and the pollutants are emitted in bursts along with the coal charging operation. Pollutants discharged to the outside world account for 50% to 60% of all pollutants discharged in the coking process, which contains a large amount of dust and sulfide. [0003] The existing coke oven coal charging flue gas purification method can remove most of the dust in the pollutants discharged to the outside during the coal charging proces...

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Problems solved by technology

[0007] The object of the present invention is to provide a coke oven coal charging flue gas purification system and method, through the coke oven coal charging flue gas to take flue gas dust removal, flue gas fan pressurization, heat exchange and cooling, cooling and cooling and adsorption purification treatment, effectively Remove sulfide and other pollutants in the coke oven coal charging flue gas, and the purified flue gas is discharged into the atmosphere through the chimney, and the desulfurization adsorbent is regenerated to ensure that the system can circulate and run stably, and the regenerated gas The follow-up treatment of sulfide and other substances in the system can better solve the problems of poor system operation stability and poor purification effect of sulfide and other pollutants, and can be used for the production and purification of coke oven coal charging flue gas

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