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Process for catalytic reduction treatment of waste-air contg. nitrogen oxiden

A nitrogen oxides and treatment process technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of poor nitrogen oxides removal effect, large equipment scale, high operating costs, and achieve a floor space The effect of small size, large size and low running cost

Inactive Publication Date: 2008-09-10
SHANGHAI DONGHUA ENVIRONMENT ENG
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Problems solved by technology

[0003] The disadvantage of the ammonia selective catalytic reduction method is that the synthetic ammonia used as a reducing agent is a chemical product, the operating cost of the device is high, and NH 3 secondary pollution
[0004] The disadvantage of the lye absorption method is that the scale of the equipment is large, the removal effect of nitrogen oxides is poor, and the concentration of NOx in the exhaust gas is maintained at 800-1000ppm

Method used

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  • Process for catalytic reduction treatment of waste-air contg. nitrogen oxiden
  • Process for catalytic reduction treatment of waste-air contg. nitrogen oxiden
  • Process for catalytic reduction treatment of waste-air contg. nitrogen oxiden

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Embodiment Construction

[0023] The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 with 2 As shown, the first embodiment of the present invention provides a catalytic reduction treatment process for waste gas containing nitrogen oxides. The waste gas containing nitrogen oxides is discharged from the nitric acid plant of a certain company's chemical fertilizer plant. The working conditions are as shown in Table 1; The tail gas is discharged from the butyl-octyl alcohol plant of a company's chemical fertilizer plant, and the working conditions are shown in Table 2.

[0025] After the above-mentioned exhaust gas containing nitrogen oxides is mixed with the above-mentioned fuel gas, it is heated to the light-off temperature by the exhaust gas heater 3 and then enters the catalytic reactor 1 through the gas inlet 13; the honeycomb platinum catalyst is fixed on the catalytic bed 15 to keep the catalytic reactor 1 ...

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Abstract

A catalytic reduction process for treating the waste gas containing NOx includes such steps as mixing said waste gas with fuel gas, adding the mixture along with the catalyst which is the cellular ceramic or metal made of Pt, Pd, or Ph into a catalytic reactor, and catalytic reduction reaction to reduce NOx into N2 and H2O.

Description

technical field [0001] The invention relates to a process for treating nitrogen oxide waste gas. Background technique [0002] Nitrogen oxides (NO x ) mainly refers to NO 2 And NO, the direct discharge of exhaust gas containing nitrogen oxides will cause serious environmental pollution, which is not only harmful to human health, but also affects the growth of crops, so effective methods must be taken to deal with it. Currently our country contains NO x The methods commonly used in waste gas treatment technology include ammonia selective catalytic reduction method and lye absorption method. [0003] The disadvantage of the ammonia selective catalytic reduction method is that the synthetic ammonia used as a reducing agent is a chemical product, the operating cost of the device is high, and NH 3 secondary pollution. [0004] The disadvantage of the lye absorption method is that the scale of the equipment is large, the removal effect of nitrogen oxides is poor, and the conc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/56B01D53/86
Inventor 赵小平吴利军
Owner SHANGHAI DONGHUA ENVIRONMENT ENG