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Flue gas wet-type reduction denitration and harmless processing method

A harmless treatment and flue gas technology, applied in the field of flue gas purification, can solve the problems of large equipment investment, high operating costs, high cost, etc., and achieve the effects of reducing operating costs, obvious environmental benefits, and huge economic benefits

Inactive Publication Date: 2012-11-28
HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention right of SCR flue gas denitrification technology belongs to the United States, and it has the disadvantages of high cost, large equipment investment, high operating cost, insufficient catalyst strength and easy poisoning.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 1L of ferric chloride solution with hydrogen ion concentration of 1mol / L and ferrous iron concentration of 2.7mol / L, then feed nitrogen monoxide gas at 30°C under one atmospheric pressure, the amount of feed is 1.7mol, and the reaction The time is 0-4h until the absorption liquid turns dark brown and stops. After standing for 1 hour, add 214.2g of sodium sulfite solid and 5g of activated carbon catalyst to the absorption liquid, stir well, and the released gas is detected by a gas detector. The main component is nitrogen, without Nitrogen oxides detected.

Embodiment 2

[0020] Get hydrogen ion concentration and be 0.7mol / L, divalent iron concentration is 300ml of ferric chloride solution of 1.3mol / L, then at 30 ℃, under one atmospheric pressure, pass into nitric oxide gas, and pass into amount is 0.39mol, The reaction time is 0-3h until the absorption liquid turns dark brown and stops. After standing for 1 hour, add 49.14g of sodium sulfite solid and 5g of Cu-Mn(II) catalyst to the absorption liquid, stir well, and the released gas passes through the gas detector Detection, the main component is nitrogen, no nitrogen oxides are detected.

[0021] The present invention has following intentional effect:

[0022] 1. Change the existing treatment process to achieve denitrification while reducing investment costs, device scale, and operating costs. This is a major breakthrough in flue gas denitrification technology and truly realizes the organic combination of social, economic and environmental benefits. Unite.

[0023] 2. This process has start...

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PUM

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Abstract

The invention relates to a flue gas wet-type reduction denitration and harmless processing method which comprises the following steps of: leading the flue gas containing NOX into an acid ferrous iron solution; absorbing NOX at 0-100 DEG C to generate dark brown absorption liquid of nitroso ferrite, nitric acid and nitrous acid to finally realize the flue gas denitration processing; and adding a reducing agent and a catalyst into the absorption liquid after denitration so that the absorbed nitroso group is transformed into nitrogen to realize harmless processing.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a flue gas wet reduction denitrification and harmless treatment method. Background technique [0002] The gas generated by the combustion of mineral fuels contains harmful components of nitrogen oxides, mainly nitrogen monoxide, nitrogen dioxide, dinitrogen trioxide and trace nitrogen pentoxide, abbreviated as NO X . Eliminate NO X , The process of purifying the exhaust gas is called denitrification. [0003] At present, my country's NOx produced by combustion x There are three types of control methods: pre-combustion control, combustion control and post-combustion control. Pre-combustion control refers to the selection of low-nitrogen fuel, but the cost is high and there are few engineering applications. Combustion control refers to improving the combustion method and production process, using low NO x Combustion technology to reduce NO in the furnace x prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56C01B21/02
Inventor 田文学贾汉东李慧陈晨
Owner HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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