Heat recovery coke oven flue gas multi-pollutant ultra-clean emission device and process thereof

Abstract

The invention relates to a heat recovery coke oven flue gas multi-pollutant ultra-clean emission device and a process, the device comprises a first SNCR system, the first SNCR system comprises a reducing agent dilution system, a reducing agent storage tank, a reducing agent spraying device and a control instrument, the reducing agent dilution system comprises a dilution water tank and a dilution water pump which are arranged in sequence, the reducing agent storage tank comprises a reducing agent dissolving tank and a reducing agent storage tank which are sequentially arranged, the reducing agent spraying device is an ejector, and the control instrument comprises a urea conveying pump located at the lower position of the reducing agent storage tank, a metering diluter located at the lower position of the dilution water pump and a distributor located at the lower position of the metering diluter. The ejector is arranged at the lower part of the distributor, is arranged outside the coke oven and is positioned at the upper part of the coke oven, the SCR reactor is arranged at the lower part of the coke oven, a CFB desulfurizing tower is arranged at the side of the SCR reactor, a dust remover is arranged at the lower part of the SCR reactor, and a chimney is arranged at the lower part of the dust remover.

Description

technical field [0001] The invention belongs to the field of ultra-clean emission of heat recovery coke oven flue gas pollutants, and in particular relates to a heat recovery coke oven flue gas multi-pollutant ultra-clean emission device and a process thereof. Background technique [0002] With the increasingly stringent national environmental protection standards, effective treatment of heat recovery coke oven exhaust pollutants has become a common consensus. At present, domestic heat recovery coke ovens use coal as the combustion medium, and the main pollutants in the flue gas are sulfur dioxide and nitrogen oxides. [0003] In 2012, the country revised the "Coking Chemical Industry Pollutant Emission Standard", which stipulates that it will be implemented on January 1, 2015, requiring that the emission of particulate matter from the chimney of the machine coke oven should not exceed 30mg / m 3 , sulfur dioxide not higher than 50mg / m 3 , nitrogen oxide is 500mg / m 3 . For...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the shortcomings of the traditional heat recovery coke oven flue gas treatment method, the present invention discloses a heat recovery coke oven flue multi-pollutant ultra-clean discharge device and its technology, which is a heat recovery coke oven flue multi-pollutant ultra-clean Net discharge device and a multi-pollutant combined treatment process for desulfurization, denitrification and dust removal

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