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Desulfurization and denitrification agent and preparation method and application thereof

A technology for desulfurization, denitrification, and denitration agent, applied in separation methods, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as catalyst efficiency decline and deactivation, and achieve the effect of improving the effect and improving the treatment effect.

Pending Publication Date: 2021-04-06
JIANGSU KEHANG ENVIRONMENT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the denitrification process, the SCR denitrification system has been running for a long time, and the complex flue gas components have a negative impact on the surface of the SCR denitrification catalyst and active substances, resulting in a decrease in catalyst efficiency or even deactivation, and a large amount of exhaust gas.

Method used

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Examples

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preparation example Construction

[0042] Another object of the present invention is to provide a kind of preparation method of desulfurization and denitrification agent as mentioned above, this method comprises the steps:

[0043] S1: In terms of parts by weight, weigh 1-20 parts of waste SCR denitration catalyst, 10-70 parts of denitrification agent, 10-70 parts of desulfurization agent, 1-20 parts of silicate and 1-5 parts of Accelerator, obtain raw material;

[0044] S2: Crushing and mixing the raw materials to obtain the mixed raw materials;

[0045] S3: drying the mixed raw materials at 65°C to 95°C to obtain dry raw materials;

[0046] S4: Grinding, sieving, and mixing the dry raw materials in sequence to obtain a desulfurization and denitrification agent.

[0047] The preparation method of the desulfurization and denitrification agent provided by this application is to crush and mix the raw materials so that each component in the desulfurization and denitrification agent is granular, and the granular ...

Embodiment 1

[0055] This embodiment provides a desulfurization and denitration agent and a preparation method thereof. Specifically, the preparation method of the desulfurization and denitration agent includes the following steps:

[0056] S1: In terms of parts by weight, weigh 1.9 parts by weight of reversibly deactivated waste SCR denitration catalyst, 12.6 parts by weight of denitrification agent, 70 parts by weight of desulfurization agent, 4 parts by weight of silicate and 1.5 parts by weight of combustion aid , to obtain the raw material; where the reversibly deactivated spent SCR denitrification catalyst is blocked deactivated V 2 o 5 、TiO 2 and WO 3 The mixture; the denitration agent is a mixture of urea and ammonium carbonate; the desulfurization agent is CaCO 3 ; Silicate is Na 2 SiO 3 , CaMg 3 Si 4 o 12 mixture; the combustion aid is a mixture of Mn, Na, K, Wu;

[0057] S2: Put the raw materials in step S1 into a crusher for crushing and mixing to obtain mixed raw mater...

Embodiment 2

[0065] This embodiment provides a desulfurization and denitration agent and a preparation method thereof. Specifically, the preparation method of the desulfurization and denitration agent includes the following steps:

[0066] S1: In terms of parts by weight, weigh 1.7 parts by weight of irreversibly deactivated waste SCR denitration catalyst, 23 parts by weight of denitrification agent, 70 parts by weight of desulfurization agent, 4 parts by weight of silicate and 1.3 parts by weight of combustion aid , to obtain the raw material; where the irreversibly deactivated waste SCR denitration catalyst is sintered deactivated V 2 o 5 、TiO 2 and WO 3 The mixture of denitrification agent is urea, ammonium carbonate and ammonium bicarbonate mixture; desulfurization agent is CaCO 3 ; Silicate is CaMg 3 Si 4 o 12 、CaNa 2 Si 6 o 14 mixture; the combustion aid is a mixture of Mn, Na, K, Wu;

[0067] S2: Put the raw materials in step S1 into a crusher for crushing and mixing to ob...

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Abstract

The invention provides a desulfurization and denitrification agent and a preparation method and application thereof, and the desulfurization and denitrification agent comprises the following components in parts by weight: 1-20 parts of granular waste SCR (Selective Catalytic Reduction) denitrification catalyst, 10-70 parts of granular denitrification agent, 10-70 parts of granular desulfurizing agent, 1-20 parts of granular silicate and 1-5 parts of granular combustion improver. According to the desulfurization and denitrification agent, the granular waste SCR denitrification catalyst is added, in the desulfurization and denitrification process, the granular waste SCR denitrification catalyst is converted into an effective catalyst through high temperature, and then the effective catalyst is combined with the desulfurizing agent, the denitrification agent and the combustion improver, so that the desulfurization and denitrification effects are effectively improved; while the waste SCR denitration catalyst is treated, the flue gas treatment effect is improved, and treatment of waste with waste is achieved.

Description

technical field [0001] The invention relates to the technical field of desulfurization and denitrification in a furnace, in particular to a desulfurization and denitrification agent and a preparation method thereof. Background technique [0002] The main pollutants emitted by coal combustion, such as dust, SO 2 , NO X , CO 2 The total amount accounts for more than 95% of the total fuel combustion emissions. Among them, SO 2 and NO X It is the main cause of acid rain; acid rain endangers ecological balance and human health in different ways, so acid rain has become one of the main environmental problems facing the world. In order to solve the problem of acid rain, countries all over the world are taking various effective measures to control SO 2 and NO X total emissions. [0003] Currently controls SO 2 and NO X The most effective means is to adopt simple, low-cost desulfurization and denitrification technology; my country's nitrogen oxide emissions mainly come from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56B01D53/81B01D53/60B01J23/30
CPCB01D53/60B01D53/81B01D53/8625B01D2258/0283B01J23/30
Inventor 隆玉周周自阳耿桂淦高小喜王春香张勇
Owner JIANGSU KEHANG ENVIRONMENT ENG TECH
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