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Cement kiln smoke gas denitration device

A cement kiln and flue gas technology, which is applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of SCR denitrification catalyst blockage, incomplete flue gas denitrification, alkali metal poisoning, etc., and achieve high ash Blockage, enhance the effect of atomization, and prevent the effect of smoke and dust blockage

Inactive Publication Date: 2019-03-29
HUADIAN QINGDAO ENVIRONMENTAL TECHNOLOCY CO LTD
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a cement kiln flue gas denitrification device to solve the problems of incomplete denitration of flue gas discharged from cement kiln, blockage, wear and alkali metal poisoning of SCR denitrification catalyst in the prior art

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  • Cement kiln smoke gas denitration device
  • Cement kiln smoke gas denitration device

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing.

[0026] Such as Figure 1-2 As shown, a cement kiln flue gas denitrification device according to the present invention includes a flue gas conveying device, an ammonia water conveying device and a denitrification reaction device, and the smoke inlet side of the flue gas conveying device is connected with the flue gas outlet of the kiln. The smoke outlet side of the gas conveying device is connected to the denitrification reactor, and the ammonia water conveying device is connected to the denitrification reactor;

[0027] The flue gas conveying device includes a conveying pipeline 4 and a high-temperature dust collector 5. According to the flow direction of the flue gas, the flue gas flows out of the kiln and then passes through the rotary kiln 1 of the cement kiln, the decomposition kiln 2, the preheater 3, and the high-temperature dust collector. In the denitrification rea...

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Abstract

The invention relates to the field of waste gas chemical or biological purification, in particular to a cement kiln smoke gas denitration device. The cement kiln smoke gas denitration device comprisesa smoke gas conveying device, an ammonium hydroxide conveying device and a denitration reactor, wherein the smoke inlet side of the smoke gas conveying device is connected with a smoke outlet of a kiln furnace; the smoke outlet side of the smoke conveying device is connected with a denitration reactor; the ammonium hydroxide conveying device is connected with the denitration reactor. The cement kiln smoke gas denitration device related by the invention can be transformed on the basis of the original cement kiln furnace; the SNCR-SCR combined denitration process is developed; a reducing agentammonium storage system is shared; the NOX standard reaching discharge is realized; the engineering manufacturing cost is reduced; the problems of SCR denitration catalyst blockage, abrasion, basic metal poisoning and the like can be effectively solved; the service life of the SCR denitration catalyst is prolonged; the safe stable and standard reaching operation of the SCR denitration system are ensured.

Description

technical field [0001] The invention relates to the field of chemical or biological purification of waste gas, in particular to a cement kiln flue gas denitrification device. Background technique [0002] The cement industry air pollutant discharge standard "GB4915-2013" stipulates: NO in general areas x Emission standard 400mg / m 3 , key area NO x Emission standard 300mg / m 3 . With the promulgation of the "Three-Year Action Plan for Winning the Blue Sky Defense War", various localities and related industries have formulated corresponding emission standards, and further strict control is carried out on the basis of the original standards. SNCR denitrification technology, as the mainstream and mature technology in the cement kiln industry at home and abroad, has been maturely applied in the cement industry and can achieve the original discharge standard. If the emission standards are further tightened, the existing single SNCR denitrification technology cannot meet the te...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/50B01D53/56B01D53/81
CPCB01D53/8631B01D53/508
Inventor 王松孟凡强高春昱秦一鸣于宁陈华王金锋徐海龙范娟孙文强张鑫王建国贺明洁张俊伟刘莉樊亮
Owner HUADIAN QINGDAO ENVIRONMENTAL TECHNOLOCY CO LTD
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