Flue gas heat exchange, temperature rise, desulfurization and denitrification system of hot rolled steel heat accumulating type heating furnace

Abstract

The invention relates to a flue gas heat exchange, temperature rise, desulfurization and denitrification system of a hot rolled steel heat accumulating type heating furnace. The system comprises a denitration assembly, a desulfurization assembly and a heat supplementing assembly, the denitration assembly comprises an air smoke side denitration unit and a coal smoke side denitration unit; the desulfurization assembly comprises an air smoke side desulfurization unit and a coal smoke side desulfurization unit; the air smoke side denitration unit is connected with the air smoke side desulfurization unit; the coal smoke side denitration unit is connected with the coal smoke side desulfurization unit; the coal smoke side denitration unit comprises a first heat exchanger, a second heat exchanger,a coal smoke side SCR denitration reactor and a coal smoke side ammonia water evaporator, the second heat exchanger is communicated with the heat supplementing assembly and the coal smoke side SCR denitration reactor, and the coal smoke side SCR denitration reactor is communicated with the coal smoke side ammonia water evaporator; the air smoke side denitration unit comprises a third heat exchanger, a smoke mixer, an air smoke side SCR denitration reactor and an air smoke side ammonia water evaporator. The flue gas denitration, desulfurization and purification efficiency is high, and the purification effect is good.

Description

technical field [0001] The invention belongs to the field of flue gas purification treatment equipment, in particular to a flue gas heat exchange temperature raising desulfurization and denitrification system of a hot-rolled steel regenerative heating furnace. Background technique [0002] Steel rolling regenerative heating furnace is the key equipment in the steel rolling process, which will produce particulate matter, SO 2 , NO x and other harmful substances, causing pollution to the surrounding environment. With the increasingly stringent environmental protection emission standards and the increasing efforts of the country to control pollution, the treatment of flue gas from steel rolling heating furnaces has been officially put on the agenda. The Ministry of Ecology and Environment has made the following strict regulations on the flue gas emission of steel rolling heating furnaces in key areas: in the case of a reference oxygen content of 8%, the particle emission conc...

AI Technical Summary

Problems solved by technology

In the prior art, it is difficult for the flue gas desulfurization and denitrification treatment equipment of the steel rolling regenerative heating furnace to purify the low-temperature exhaust gas up to the standard, so there is an urgent need for a purification system that can make the desulfurization and denitrification of the steel rolling regenerative heating furnace meet the standard emission

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