System and method for realizing desulfurization and denitrification of coke oven flue gas by using waste heat of rising pipe

Abstract

The invention relates to a system and method for realizing desulfurization and denitrification of coke oven flue gas by using waste heat of a rising pipe. A flue gas inlet of a low and medium-temperature flue gas desulfurization and denitrification device is connected with a main flue of a coke oven; a flue gas outlet of the low and medium-temperature flue gas desulfurization and denitrification device is connected with a flue gas inlet of a waste heat recycling device and also connected with a flue gas inlet in a raw gas-flue gas heat exchange device; a flue gas inlet in the raw gas-flue gasheat exchange device is connected with a pyrolysis gas inlet of a denitrification reactor in the low and medium-temperature flue gas desulfurization and denitrification device; a pyrolysis gas outletis connected with a flue gas outlet in the low and medium-temperature flue gas desulfurization and denitrification device; the raw gas-flue gas heat exchange device is arranged on the rising pipe of the coke oven; a flue gas outlet of the waste heat recycling device is connected with a chimney of the coke oven. The system can effectively solve the problem of high operation cost required by analysis and regeneration of a coke oven flue gas denitrification unit, and also realizes full use of the waste heat of a production process of the coke oven.

Description

technical field [0001] The invention relates to the technical field of flue gas purification and waste heat recovery, in particular to a system and method for realizing desulfurization and denitrification of coke oven flue gas by utilizing waste heat of rising pipes. Background technique [0002] During the production process of the coke oven, the heating system of the coke oven burns gas to obtain enough heat for carbonization of the coal material in the coke oven carbonization chamber. During the combustion process of the gas, a certain amount of NOx is produced due to high temperature, and the sulfur in the gas is oxidized into SO 2 , NOx and SO 2 The exhaust gas produced by combustion will be discharged through the flue of the coke oven. If no effective measures are taken to purify the flue gas of the coke oven, it will cause serious pollution to the atmospheric environment. The purification of coke oven flue gas usually refers to the purification of NOx and SO in flue...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a system and method for realizing desulfurization and denitrification of coke oven flue gas by utilizing the waste heat of rising pipe, which can effectively solve the problem of high operating costs required for the analysis and regeneration of coke oven flue gas denitrification unit, and also realize coke oven flue gas desulfurization and denitrification. Full utilization of waste heat in the production process

Images