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Wet urea additive process for simultanously desulfurizing and denitrification

A urea additive and additive technology, applied in separation methods, chemical instruments and methods, air quality improvement and other directions, can solve the problems of complex catalyst preparation and regeneration process, secondary waste water pollution, difficult to repeat implementation, etc., to control environmental pollution and The effect of land acidification, investment and operation cost saving, and easy transportation

Inactive Publication Date: 2002-11-06
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

[0003] The purpose of the present invention is to overcome and solve the complex process in the existing desulfurization and denitrification technology; Simultaneous removal of SO in flue gas by wet method of exhaust pollution and urea as absorbent 2 and NO x The shortcomings and problems of poor stability and difficult repeated implementation of the method have been studied and invented a method that uses urea as the absorbent and adds a certain amount of additives to make the SO in the flue gas 2 , NO x Simultaneous desulfurization and denitrification method for urea additive wet flue gas that can be removed stably and efficiently to achieve the purpose of purification and treatment

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  • Wet urea additive process for simultanously desulfurizing and denitrification
  • Wet urea additive process for simultanously desulfurizing and denitrification
  • Wet urea additive process for simultanously desulfurizing and denitrification

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Embodiment Construction

[0008] The inventor thinks that the preferred way to realize the present invention can be as follows: (1) according to figure 1 As shown, design, process and manufacture or purchase various components, for example: the dispensing tank 1 can be processed by steel plate by machining; the mixer 2 can be BLD1.5-2-112 type; the dosing pump 3 can be selected from Shanghai Shenyang Pump Factory Produced WBR-5 / 7 dosing pump; absorption tower 4 can be optional nozzleless atomization absorption tower TLD type, the effective height can be 1.0-3.0 meters, and the diameter can be 0.6 meters; circulation pump 5 can be selected from Guangzhou No. 1 Water Pump Factory The KF50-23 circulating pump is produced; the evaporator 8 can be the HN-01 forced external circulation four-effect evaporator improved and developed by the South China Environmental Science Research Institute; the dryer 10 can be the HN type double-pipe improved and developed by the South China Environmental Science Research Ins...

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Abstract

The present invention relates to flue gas purifying treatment technology. The equipment consists of chemical compounding tank with stirrer, chemical adding pump, adsorber tower, circulating pump, storing pond for concentrated absorbent liquid, evaporating inlet pump, evaporator, drying inlet pump and drying machine connected via pipeline. It desulfurizes and denitrificates simultaneously through the mixed reaction of flue gas and absorbent liquid in the absorber tower with urea as absorbent and organic amine or phosphate as additive. It has an SO2 eliminating rate up to 95% and NOx eliminating rate up to 80%, with the recovered ammonium sulfate being used as fertilizer.

Description

(1) Technical field: [0001] The invention is a method for simultaneously desulfurizing and denitrifying flue gas in a urea additive wet process, which belongs to waste gas treatment in environmental pollution prevention and control, and in particular relates to boiler flue gas purification and treatment technology. (two) background technology: [0002] Today, environmental acidification has become one of the important factors restricting social and economic development. The main source of environmental acidification is sulfur dioxide, SO 2 and nitrogen oxides NO x . Industrial production, transportation, waste incineration and civil combustion will all 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. my country SO 2 and NO x The annual emissions already ranked first in the world in 1995, respectively 23.7 million tons and 7.7 million tons, and became more and more serio...

Claims

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Application Information

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IPC IPC(8): B01D53/60B01D53/78
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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