Arsenic-poisoned denitration catalyst regeneration liquid and application

A denitration catalyst, arsenic poisoning technology, applied in catalyst regeneration/reactivation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. Denitration requirements and other issues, to avoid multiple roasting, meet the requirements of denitration engineering, reduce the effect of safety impact

Active Publication Date: 2016-12-07
重庆远达催化剂综合利用有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The arsenic content in coal in some areas of my country can be as high as 40-60mg/Kg, especially in the northeast and Inner Mongolia, the denitrification catalysts are prone to arsenic poisoning, such as the Huolinhe pit mouth project, the As in the catalyst 2 o 3 The content is a

Method used

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  • Arsenic-poisoned denitration catalyst regeneration liquid and application
  • Arsenic-poisoned denitration catalyst regeneration liquid and application
  • Arsenic-poisoned denitration catalyst regeneration liquid and application

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1

[0014] 1. Preparation of regenerated liquid

[0015] 1. Preparation of cleaning fluid

[0016] In the cleaning tank, the penetrant SF, H with a mass fraction of 1% will be prepared 2 O 2 The mass fraction is 0.05%, the rest is water, and the pH value of the solution is adjusted to 10.5 with TMAH. Carry out air bubbling treatment for 20 minutes to make it evenly mixed, and leave to age for 1 hour to obtain a cleaning solution totaling 7000L.

[0017] 2. Preparation of active supplement

[0018] In the activation cell, configure VOSO with a molar concentration of 0.8mol / L 4 , The rest is water. Perform air stirring for 10 minutes to make it evenly mixed, and leave to age for 1 hour to obtain an active replenisher, totaling 7000L.

[0019] 2. Denitration catalyst regeneration process

[0020] Put the arsenic poisoning catalyst module into the cleaning tank containing the cleaning solution, keep it at 60°C, and clean with air bubbling for 60 minutes; then, immerse the cat...

Example Embodiment

[0021] Example 2

[0022] 1. Preparation of regenerated liquid

[0023] 1. Preparation of cleaning fluid

[0024] In the cleaning tank, the mass fraction of penetrant SF is 1%, H 2 O 2 The mass fraction is 0.03%, the rest is water, and the pH value of the solution is adjusted to 10.5 with TMAH. Carry out air bubbling treatment for 20 minutes to make it evenly mixed, and leave to age for 1 hour to obtain a cleaning solution totaling 7000L.

[0025] 2. Preparation of active supplement

[0026] In the activation cell, configure VOSO with a molar concentration of 0.6 mol / L 4 , The rest is water, air-stirred for 10 minutes to make it evenly mixed, and left to age for 1 hour to obtain an active replenisher, totaling 7000L.

[0027] 2. Denitration catalyst regeneration process

[0028] Put the arsenic poisoning catalyst module into the cleaning tank containing the cleaning solution, keep it at 50°C, and clean with air bubbling for 50 minutes; then, immerse the catalyst module in the activity su...

Example Embodiment

[0029] Example 3

[0030] 1. Preparation of regenerated liquid

[0031] 1. Preparation of cleaning fluid

[0032] In the cleaning tank, the mass fraction of penetrant SF is 1%, H 2 O 2 The mass fraction is 0.05%, the rest is water, and the pH value of the solution is adjusted to 10.5 with TMAH. Carry out air bubbling treatment for 20 minutes to make it evenly mixed, and leave to age for 1 hour to obtain a cleaning solution totaling 7000L.

[0033] 2. Preparation of active supplement

[0034] In the activation cell, configure VOSO with a molar concentration of 0.4mol / L 4 , The rest is water. Perform air stirring for 10 minutes to make it evenly mixed, and leave to age for 1 hour to obtain an active replenisher, totaling 7000L.

[0035] 2. Denitration catalyst regeneration process

[0036] Put the arsenic poisoning catalyst module into the cleaning tank containing the cleaning solution, keep it at 45℃, and clean it with air bubbling for 55 minutes; then, immerse the catalyst module in the...

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Abstract

The invention discloses arsenic-poisoned denitration catalyst regeneration liquid and an application. The arsenic-poisoned denitration catalyst regeneration liquid is composed of cleaning liquid and active supplementary liquid, wherein the cleaning liquid comprises tetramethylammonium hydroxide, hydrogen peroxide, an osmotic agent SF and the balance water; the active supplementary liquid comprises vanadyl sulfate and the balance water; the cleaning liquid comprises 0.01 to 1.00% of the osmotic agent SF and 0.01 to 0.05% of hydrogen peroxide; a preparation method for the cleaning liquid is as follows: subjecting the osmotic agent, hydrogen peroxide and the water to mixing under stirring in proportion so as to obtain a solution, and adjusting the pH value of the solution to 9.0 to 10.5 with tetramethylammonium hydroxide; and the concentration of vanadyl sulfate in the active supplementary liquid is 0.2 to 0.8 mol/L. The regeneration liquid provided by the invention is used for regeneration of an arsenic-poisoned denitration catalyst. According to the invention, the activity of a deactivated catalyst is significantly improved; the catalytic activity of the regenerated catalyst is extremely close to the catalytic activity of a fresh catalyst; meanwhile, the compressive strength and the wear rate of a catalyst may not be reduced; and the requirements of a denitration project in a coal-fired power plant are met.

Description

technical field [0001] The invention belongs to the field of catalysts for coal-fired power plants, and in particular relates to a regeneration solution for arsenic poisoning denitrification catalysts and a catalyst regeneration method. Background technique [0002] NO in coal flue gas x Excessive emissions will cause acid rain, photochemical smog, ozone depletion and greenhouse effect, posing a great threat to the natural environment and human health. Take NH 3 Reduction of NO by Selective Catalyst as Reductant x It is the most widely used and mature technology at present. [0003] The arsenic content in coal in some areas of my country can be as high as 40-60mg / Kg, especially in the northeast and Inner Mongolia, the denitrification catalysts are prone to arsenic poisoning, such as the Huolinhe pit mouth project, the As in the catalyst 2 o 3 The content is as high as 2.5% (XRF test results), the catalytic activity of the catalyst is severely reduced, and the denitrific...

Claims

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Application Information

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IPC IPC(8): B01J38/64B01J23/92
CPCB01J23/92B01J38/485B01J38/64
Inventor 刘伟刘红辉洪永江黄锐袁鹏李爽李玉兵黄新竹张政科成丹席文昌解晓斌陈付国林菊艳王刚王雷
Owner 重庆远达催化剂综合利用有限公司
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