Coke oven combustion emission denitration apparatus and method

Abstract

The invention provides a coke oven combustion emission denitration apparatus and method; the apparatus comprises a plurality of combustion chambers and carbonization chambers that are connected at intervals, left and right regenerative chambers adjacently connected are arranged sequentially below each carbonization chamber, a plurality of regenerative bricks are arranged in each regenerative chamber from top to bottom, heat exchange passages are formed among the regenerative bricks, and gas passages are formed between the regenerative chambers and the combustion chambers. By arranging denitration agent ejectors in positions, having a temperature range of 1100 DEG C<t< / =1300 DEG C, above the regenerative bricks on the sides of the regenerative chambers, the denitration problem of combustion emissions from coking industry is solved; as a denitration agent for the denitration of coke oven emissions is neutral or nearly neutral and liquid in physiochemical aspect; compared with traditional alkaline or strongly alkaline and gaseous denitration agents, the denitration agent used herein has the advantages of high safety, zero corrosiveness, long ejection distance and wide ejection range.

Description

technical field [0001] This patent relates to the technical field of coke oven waste gas denitrification, in particular to a coke oven combustion waste gas denitrification device and a denitrification method thereof. Background technique [0002] The coking industry has always occupied a pivotal position in my country. The coking products it produces are widely used in the steel industry, foundry industry, chemical industry, pharmaceutical industry, refractory material industry and national defense industry. During the production process, a large amount of waste gas containing nitrogen oxides will be produced. If the waste gas is directly discharged into the air, it will cause harm to the living environment of people and other animals and plants, and then bring serious damage to the earth's ecological environment and human society. impact and damage. Therefore, the denitrification treatment of the combustion exhaust gas of the coking oven is an urgent task in the modern cokin...

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Problems solved by technology

[0004]Because the reducing agent injection device of this technical solution is set in the area where the temperature of the coke oven regenerator is 850-1100℃, but in fact, the heat storage The area with an indoor temperature of 850-1100°C is an area full of heat storage bricks, because considering the space required for the injection and diffusion of the reducing agent, and the direct spraying of the reducing agent on the heat storage bricks will cause damage to the heat storage bricks, etc. problem, so the reductant injection device cannot be installed in the heat storage brick arrangement area

Therefore, it is not feasible to install the reducing agent injection device in the area where the temperature in the regenerator of the coke oven is 850-1100°C

[0005] In addition, the reducing agent used in this technical solution is ammonia gas or ammonia-containing liquid is a strong alkaline substance, which is highly corrosive to the furnace wall and regenerator, resulting in Coke oven life is greatly shortened

Furthermore, if ammonia is used, the injection effect is not good because the gaseous ammonia is difficult to spray remotely.

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