Integrated flue gas desulfurization and denitrification agent and application method thereof

A technology of desulfurization, denitrification, and desulfurization agent, which is applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of unsatisfactory flue gas purification treatment, high investment and operation costs, and difficult recycling, etc., to achieve desulfurization Good denitrification effect, high out-of-stock efficiency, and improved effect

Active Publication Date: 2017-05-31
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complexing agent EDTA is expensive, and it is not easy to recycle, so it consumes a lot in the denitrification process, and the ferrous iron is easily oxidized to ferric iron and loses the ability of denitrification
The investment and operation costs of the above-mentioned prior art are high, and the flue gas purification treatment effect is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A flue gas desulfurization and denitrification agent is prepared by mixing the following components: desulfurization agent, reducing agent, iron-based denitrification catalyst, activator and suspending agent, the desulfurization agent is ammonia water, and the reducing agent is (NH 4 ) 2 SO 3 , the amount of reducing agent is equal to the total weight of desulfurizer, and the weight percentage of iron-based denitration catalyst is composed of: 85% Fe 2 o 3 , 5% SiO 2 , 5% of V 2 o 5 , 5% TiO 2 , the dosage of the iron-based denitration catalyst is 3% of the total weight of the desulfurizer, the activator is acetic acid, the dosage of the activator is twice the molar number of the iron-based denitration catalyst, the suspending agent is a mixture of polyaluminum chloride and polyacrylamide, the suspending agent The dosage is 10% of the weight of the iron-based denitration catalyst. The desulfurization and denitrification agent is configured as a spray solution wit...

Embodiment 2

[0053] A flue gas desulfurization and denitration agent is made by mixing the following components: desulfurization agent, iron-based denitration catalyst, activator and suspending agent, the desulfurization agent is a mixture of magnesium oxide and sodium hydroxide, and the weight percentage of the iron-based denitration catalyst is composed of : 90% Fe 2 o 3 , 9% SiO 2 , 0.5% of V 2 o 5 , 0.5% TiO 2 , the dosage of the iron-based denitration catalyst is 8% of the total weight of the desulfurizer, the activator is sulfuric acid, the dosage of the activator is 3 times the molar number of the iron-based denitration catalyst, the suspending agent is a mixture of polyferric chloride and polyaluminum sulfate, and the suspending agent The dosage is 0.5% of the weight of the iron-based denitration catalyst. The desulfurization and denitrification agent is used to prepare a spray solution with a concentration of 15%.

[0054] Using the flue gas desulfurization and denitrificati...

Embodiment 3

[0058] A flue gas desulfurization and denitrification agent, which is made by mixing the following components: desulfurization agent, reducing agent, iron-based denitrification catalyst, activator and suspending agent, the desulfurizing agent is sodium hydroxide, the reducing agent is sodium sulfite, and the amount of reducing agent is desulfurization 50% of the total weight of the catalyst, the weight percentage of the iron-based denitration catalyst is composed of: 90% Fe 2 o 3 , 0.4% SiO 2 , 4.6% of V 2 o 5 , 5% TiO 2 , the amount of iron-based denitrification catalyst is 5% of the total weight of the desulfurizer, the activator is a mixture of acetic acid and sulfuric acid, the amount of activator is twice the molar number of the iron-based denitrification catalyst, and the suspending agent is a mixture of polyaluminum sulfate and polyacrylamide , the amount of suspending agent is 3% of the weight of the iron-based denitration catalyst. The desulfurization and denitri...

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PUM

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Abstract

The invention relates to an integrated flue gas desulfurization and denitrification agent and an application method thereof. The invention is characterized in that the flue gas desulfurization and denitrification agent comprises the following ingredients: a desulfurizing agent, an iron-based denitration catalyst, an activator and a suspending agent. By using an alkaline substance as a desulfurizing agent, using the desulfurization product sulfite as a reducing agent and using the iron-based denitration catalyst as an active reaction factor, simultaneous removal of sulfur dioxide and nitrogen oxide in flue gas is realized in a the gas-liquid-solid three-phase homogenization suspension state, wherein NOx is reduced into nitrogen; and a reacted absorption liquid is activated by the use of an acid solution and a suspending agent is supplemented and then the mixture is sent by a circulating pump into a reaction tower for recycling. The method is simple to operate. By the method, desulphurization efficiency is 99% and above, denitration efficiency is 90% and above, and the desulfurization and denitrification effect is good. The materials are recycled, thus greatly reducing the operating cost of desulfurization and denitrification. The product has obvious economic advantages and can be used for treatment of flue gas or tail gas of various industrial boilers and industrial furnaces.

Description

technical field [0001] An integrated flue gas desulfurization and denitrification agent and a use method thereof relate to a desulfurization and denitrification agent for flue gas treatment and a wet desulfurization and denitrification method for the flue gas. Background technique [0002] In recent years, the problem of environmental pollution has become more and more serious, especially the smoke pollution has been paid more and more attention by the society. SO in flue gas 2 and NO x Environmental pollution problems such as acid rain, photochemical smog, and smog have deeply affected the environment on which human beings depend. As the Ministry of Environmental Protection of the People's Republic of China has increased environmental protection requirements in recent years, while controlling SO 2 , NO x Emissions requirements are more pressing. Traditional desulfurization and denitrification technologies have high economic costs, complicated processes, large floor spa...

Claims

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Application Information

Patent Timeline
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IPC IPC(8): B01D53/86B01D53/60B01D53/78
CPCB01D53/60B01D53/78B01D53/8637B01D2251/20B01D2251/506B01D2251/60B01D2251/602B01D2251/604B01D2251/606B01D2251/70B01D2252/102B01D2252/602B01D2256/12B01D2257/302B01D2257/40B01D2258/0283Y02A50/20
Inventor 刘万超李学鹏张朝普闫琨和新忠杨晨星刘中凯杜艳鲍春
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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