Method for reducing nitrogen oxide exhaust of cement kiln

A nitrogen oxide, cement kiln technology, applied in chemical instruments and methods, separation methods, dispersed particle separation and other directions, can solve problems such as environmental pollution, and achieve the effects of reducing environmental pollution, large amplitude and convenient operation

Inactive Publication Date: 2003-11-26
TIANJIN CEMENT IND DESIGN & RES INST
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Problems solved by technology

[0003] In order to solve the current environmental pollution caused by the production of nitrogen oxides in cement and the problem that the existing technology has a certain limit in reducing nitrogen oxides, the present invention provides a waste gas denitrification technology that is not restricted by the production process and can reduce nitrogen oxides. It can flexibly select parameters according to the requirements of emission standards, and it is easy to operate and the process is simple. It is a method to reduce the emission of nitrogen oxides in cement kilns.

Method used

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  • Method for reducing nitrogen oxide exhaust of cement kiln
  • Method for reducing nitrogen oxide exhaust of cement kiln
  • Method for reducing nitrogen oxide exhaust of cement kiln

Examples

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[0015] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0016] see figure 1 , a method for reducing nitrogen oxide emissions from cement kilns. When the temperature in the upper area of ​​the calciner 14 of the cement pre-decomposition system is heated to 850-1050 ° C, the nozzle on the spray gun 8 is placed in this area, and the ammonia water pipeline is respectively opened And the valve body on the compressed air pipeline, so that the ammonia water in the ammonia water storage tank 1 placed on the ±0.00 plane is filtered by the filter 2, and then enters through the manual stop valve 3 and the flanged spherical plug valve 4. Arranged on the ±0.00 plane The first-stage booster pump 5, the ammonia water after the booster pump is transported to the liquid and gas supply pump station 10 on the plane ...

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Abstract

The present invention relates to the field of inorganic non-metal material technology. In the upper area of 850-1050 deg.c inside decomposing furnace in cement pre-decomposing system, nozzle of spray gun is set. Ammonia water of 20-25 % concentration and from the storage is pressurized via one stage of pressurizing pump and supplied to the nozzle in the amount determined based on NH3 / NO=1.3-2.0, compressed air in the pressure of 0.5-5 Kg / sq cm is also provided to the nozzle, so that the nozzle jets fine atomized liquid of 10-20 micron average particle size to the said area. The present invention features no limitation of production process and great nitrogen oxide reducing amount.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a method for reducing nitrogen oxide emissions from cement kilns. Background technique [0002] With the continuous development of my country's scientific and technological progress and the continuous improvement of people's living standards, the construction industry has become the main investment field for national economic development. Cement is one of the essential materials in the construction industry, so the demand will increase, and the air pollution caused by the nitrogen oxides emitted from the production of cement has seriously damaged the ecological environment of the earth. According to statistics, the cement industry has become a major nitrogen oxide emitter after the power industry, which is equivalent to automobile exhaust. At present, the main measures for reducing nitrogen oxides in cement kilns are: using tissue combustion technology in the cemen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56C04B7/44
Inventor 胡芝娟狄东仁陆继东彭学平沈序辉
Owner TIANJIN CEMENT IND DESIGN & RES INST
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