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Integrated method for wet-process desulfurization, denitrification demercuration and dearsenification of complexing ferroporphyrin smoke based on supergravity

A wet desulfurization and supergravity technology, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of complex process routes and high operating costs, and achieve simple processes, high absorption efficiency, and high regeneration efficiency Effect

Inactive Publication Date: 2013-12-11
WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic scholars have reported iron filings, malic acid, vitamin C, etc. to regenerate Fe(III)EDTA, but the key problems of this technology are high operating costs and complicated process routes, and further research is needed

Method used

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  • Integrated method for wet-process desulfurization, denitrification demercuration and dearsenification of complexing ferroporphyrin smoke based on supergravity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] High gravity complexation ferrous flue gas wet desulfurization, denitrification and arsenic integration method, such as figure 1 shown, including the following steps:

[0029] 1) Set the temperature after dust removal to 120 Flue gas at 400Nm 3 The flow rate of / h is sent to the desulfurization supergravity machine, and the SO in the flue gas 2 The concentration is 600-1000ppmv, the NO concentration is 500-800ppmv, and the arsenic content is 6-20μg / Nm 3 , Mercury content 9~17μg / Nm 3 , Oxygen concentration 2%v, the flue gas and the storage tank are pumped into the desulfurization supergravity medium at a temperature of 20 The sodium sulfide aqueous solution is in countercurrent contact in the rotor packing layer of the supergravity machine, desulfurization, mercury removal, and arsenic removal. The volume ratio of flue gas to sodium sulfide aqueous solution is 100:1, and the concentration of sodium sulfide aqueous solution is 0.1mol / L;

[0030] 2) The flue gas after...

Embodiment 2

[0036] High gravity complexation ferrous flue gas wet desulfurization, denitrification and arsenic integration method, such as figure 1 shown, including the following steps:

[0037] 1) Set the temperature after dust removal to 40 gas at 400Nm 3 The flow rate of / h is sent to the desulfurization supergravity machine, and the SO in the flue gas 2 The concentration is 1400-2000ppmv, the NO concentration is 500-800ppmv, and the arsenic content is 6-20μg / Nm 3 , Mercury content 9~17μg / Nm 3 , Oxygen concentration 3%v, the temperature of the flue gas and the desulfurization supergravity from the storage tank through the pump is 0 The sodium hydrosulfide aqueous solution is in countercurrent contact in the supergravity machine rotor packing layer, desulfurization, mercury removal, and arsenic removal. The volume ratio of flue gas to sodium hydrogensulfide aqueous solution is 1000:1, and the concentration of sodium hydrogensulfide aqueous solution is 1.0mol / L ;

[0038] 2) The ...

Embodiment 3

[0044] High gravity complexation ferrous flue gas wet desulfurization, denitrification and arsenic integration method, such as figure 1 shown, including the following steps:

[0045] 1) Set the temperature after dust removal to 80 gas at 400Nm 3 The flow rate of / h is sent to the desulfurization supergravity machine, and the SO in the flue gas 2 The concentration is 1600-2400ppmv, the NO concentration is 500-800ppmv, and the arsenic content is 6-20μg / Nm 3 , mercury content 9~17μg / Nm 3 , the oxygen concentration is 5% v, the flue gas is in countercurrent contact with the ammonium sulfide aqueous solution pumped into the desulfurization supergravity from the storage tank through the pump, and the temperature is 35 °C in the rotor packing layer of the supergravity machine, desulfurization, mercury removal, and arsenic removal, the flue gas The volume ratio to the ammonium sulfide aqueous solution is 800:1, and the concentration of the ammonium sulfide aqueous solution is 2.0...

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Abstract

The invention discloses an integrated method for wet-process desulfurization, denitrification demercuration and dearsenification of complexing ferroporphyrin smoke based on supergravity. The method comprises the following steps of firstly, absorbing SOx by utilizing inorganic sulfide, desulfurating, meanwhile, reacting inorganic sulfide with toxic heavy metals such as mercury and arsenic in the smoke so as to generate an insoluble vulcanized salt; utilizing a complexing ferroporphyrin to absorbing NOx by utilizing complexing ferroporphyrin for denitration; and regenerating ab absorber by utilizing inorganic sulfide as a reducing agent. The method provided by the invention has the advantages that a supergravity machine is adopted as gas-liquid mass transfer strengthening equipment, the method is beneficial to removal of toxicants such as SOx, NOx, mercury and arsenic, the regeneration efficiency of the absorbent is high, an absorption liquid is applied in a circulating manner, a reducing agent inorganic sulfide is oxidized so as to generate sulphur which can be recovered, sulphur is processed into a high quality sulphur product, and the secondary pollution is not generated; the process is simple, the absorption efficiency is high, the dust is thoroughly removed, the desulfurization degree is more than 99%, the denitration rate is more than 96%, and mercury and arsenic in the smoke are fully basically removed.

Description

technical field [0001] The invention relates to industrial flue gas purification, in particular to an integrated method for wet desulfurization, denitrification, and arsenic removal of ferrous flue gas by supergravity complexation. Background technique [0002] The pollution of acid rain and its harm have become one of the important environmental issues concerned by countries all over the world. my country is a country where coal is the main energy source. According to survey statistics, more than 90% of SO in my country 2 、More than 67% NO X , More than 70% of the soot emissions come from the combustion of coal. The SO produced by coal combustion 2 and NO X It is the main source of industrial waste gas pollution (acid rain hazard). Nitrogen oxides can also form photochemical pollution, produce the greenhouse effect, destroy the ozone layer, and have toxic effects on the human body. Nitrogen oxides and sulfur oxides can also be converted into PM2.5 to cause haze weathe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/60B01D53/64B01D53/24B01D53/78
CPCY02A50/20
Inventor 余国贤黄泽朔潘威李海峰路平吴宏观隋志军万昆
Owner WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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