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Flue gas system for ultra-clean treatment of cement kiln exhaust gas

A cement kiln and tail gas technology, applied in gas treatment, dispersed particle filtration, membrane technology, etc., can solve the problems of strict emission limit, lower emission concentration, low denitration efficiency, etc., to increase the contact area, improve the utilization rate, System reliable effect

Pending Publication Date: 2019-02-22
NANJING CEEP TECH
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Problems solved by technology

[0007] In order to solve the problems of insufficient reaction, low denitrification efficiency, and increasingly strict emission limits, the present invention provides a flue gas system for ultra-clean treatment of cement kiln tail gas. efficiency, reducing SO 2 emission concentration, and its desulfurization ash can also be utilized as a resource, creating a certain economic value

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  • Flue gas system for ultra-clean treatment of cement kiln exhaust gas

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Embodiment Construction

[0032] The preferred embodiments of the present invention will now be further described in conjunction with the accompanying drawings. It should be understood that the accompanying drawings are simplified schematic diagrams illustrating the basic structure of the patent in a schematic manner, so it only shows the composition related to the patent of the present invention.

[0033] Such as figure 1 As shown in the embodiment, a flue gas system for ultra-clean treatment of cement kiln tail gas is disclosed, including oxidation and denitrification reactor 1, CFB absorption tower 2, bag filter 3, chimney 4, process water system, absorbent preparation and Supply system, and desulfurization ash circulation and conveying system. The inlet of the oxidation denitrification reactor 1 is connected to the outlet of the kiln tail bag filter 19 (that is, the original bag filter installed at the outlet of the cement kiln), and the outlet of the oxidation denitrification reactor 1 is connecte...

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Abstract

The invention provides a flue gas system for ultra-clean treatment of cement kiln exhaust gas. The flue gas system includes an oxidative denitration reactor, a CFB absorption tower, a bag filter, a process water system, an absorbent preparation and supply system, a desulfurization ash circulation and conveying system and a chimney. The process water system includes a process water tank, a water pump, a desulfurization spray gun and a digestion spray gun. An absorbent preparation system includes a quick lime bin, a dry digester, a cyclone separator, a buffer bin and a slaked lime bin. The desulfurization ash circulation and conveying system includes an air chute and a bin pump. A dry type coupling desulfurization and denitrification technology is adopted, nitrogen oxides and sulfur oxides in flue gas can be effectively removed, to meet national regulations on ultra-low emission of flue gas pollutants, the flue gas system is free of waste water or secondary pollution, and a by-product can be utilized.

Description

technical field [0001] The invention relates to a flue gas system for ultra-clean treatment of cement kiln tail gas, which is suitable for ultra-low emission treatment of flue gas in the cement industry. Background technique [0002] Under the circumstances that the prevention and control of air pollution in the thermal power industry has reached a certain level, non-electric industries such as iron and steel, metallurgy, and building materials have also quickly kicked off the prelude to standard upgrading and transformation. For the prevention and control of air pollution in non-electricity industries, the Ministry of Environmental Protection and local provincial and municipal governments issued a series of stricter pollutant discharge standards and supporting policies. In June 2017, the Ministry of Environmental Protection issued a revision list (draft for comments) Form, to revise 20 national pollutant discharge standards including the "Steel Sintering and Pellet Industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01D53/50B01D53/76B01D53/18B01D53/14B01D46/02
CPCB01D53/56B01D46/02B01D53/14B01D53/1456B01D53/1481B01D53/18B01D53/50B01D53/502B01D53/76B01D2251/404B01D2252/10B01D2258/0233B01D2258/0283
Inventor 刘训稳李萍韩冰陈勇孙颖
Owner NANJING CEEP TECH
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