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Method for urea catalyst simultaneously processing flue gas and desulfurizing denitrification

A catalyst and urea technology, applied in chemical instruments and methods, separation methods, air quality improvement and other directions, can solve the problems of high cost of additives and limited industrial application, and achieve the effects of high operating costs, easy transportation and simple process flow

Inactive Publication Date: 2005-03-16
国家环境保护总局华南环境科学研究所
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Problems solved by technology

However, the relative cost of the most critical additives used in this method is relatively high, which limits industrial application

Method used

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  • Method for urea catalyst simultaneously processing flue gas and desulfurizing denitrification

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Embodiment Construction

[0012] Below in conjunction with embodiment, the present invention is described in further detail.

[0013] The inventor has many successful implementation examples through research and experiment for a long period of time. Four examples are listed in Table 1 below.

[0014] Table 1

[0015]

[0016]

[0017] up, NO x Removal rate

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Abstract

The present invention relates to a method for desulfurization and denitrogenation at the same time of treating flue gas by using urea catalyst. Said method uses the urea as absorbing agent, and uses titanium dioxide or diatomite as catalyst to prepare absorption liquor, makes the flue gas mixw ith the absorption liquor to recover ammonium sulfate and ammonium nitrate, and can make comprehensive utilization to prepare fertilizer. Said invention is high-effective, can stably remove SO2 and NOx, the SO2 removing rate is up to above 95% and the NOx removing rate is up to 80%. It has no secondary pollution and is low in cost, so that it is suitable for industrial production.

Description

(1) Technical field [0001] The invention relates to the technical field of boiler flue gas purification and treatment, in particular to a method for simultaneously desulfurizing and denitrifying flue gas with a urea catalyst. (2) Background technology [0002] Air pollution is one of the most serious problems facing the survival and development of human society in the 21st century. The most serious air pollution is acidification pollution, which has a large amount of pollutants and a wide range of pollution, resulting in regional environmental acidification. Environmental acidification is mainly caused by sulfur dioxide-SO 2 (sulfur dioxide) and nitrogen oxides -NO X (nitrogen oxides), industrial production, transportation, waste incineration and civil combustion processes will emit SO 2 , NO X , especially boiler combustion pollution is the most serious, 90% of SO in the air 2 and 60% NO x Flue gas from boiler combustion. At present, there are mainly the following me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/60B01D53/86
CPCY02A50/20
Inventor 岑超平
Owner 国家环境保护总局华南环境科学研究所
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