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Recycling and reusing method of waste vanadium tungsten titanium-based denitration catalyst

A denitrification catalyst, vanadium tungsten titanium technology, applied in the field of flue gas purification, can solve problems such as the inability to directly apply catalyst production, and achieve the effects of easy centralized and rapid processing, resource recycling, and cost reduction

Active Publication Date: 2016-06-01
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product cannot be directly applied to catalyst production

Method used

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  • Recycling and reusing method of waste vanadium tungsten titanium-based denitration catalyst
  • Recycling and reusing method of waste vanadium tungsten titanium-based denitration catalyst
  • Recycling and reusing method of waste vanadium tungsten titanium-based denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for recycling a waste vanadium-tungsten-titanium-based denitration catalyst, the specific steps of which are as follows:

[0044] (1), take 0.001m 3 150mm×150mm×1100mm deactivated honeycomb catalyst V with operation over 24000h 2 o 5 -WO 3 / TiO 2 The catalyst is deashed by negative pressure vacuum equipment to completely remove the dust on the surface of the catalyst and in the pores.

[0045] (2), prepare the first cleaning solution and the second cleaning solution: the formula of the first cleaning solution is: 1% sodium hydroxide, 0.5% sodium carbonate, 0.05% sodium edetate, 0.05% di Sodium ethylene triamine pentaacetate, 0.03% sodium citrate, 1% JFC, 0.01% OP-10, 0.01% Pyrexa, 0.05% sodium pyrophosphate and the balance deionized water; and The formula of the second cleaning solution is: 3% sulfuric acid, 0.5% citric acid, 0.1% tartaric acid, 0.01% ethylenediaminetetraacetic acid, 0.01% JFC, 0.005% OP-10, 1% Pingping The remaining amount of deionized w...

Embodiment 2

[0053] A method for recovering and reusing waste vanadium-tungsten-titanium-based denitration catalyst, the specific steps are as follows:

[0054] (1), take 0.001m 3 150mm×150mm×1100mm deactivated honeycomb catalyst V with operation over 24000h 2 o 5 -WO 3 / TiO 2 The catalyst is deashed by negative pressure vacuum equipment to completely remove the dust on the surface of the catalyst and in the pores.

[0055] (2), prepare the first cleaning solution and the second cleaning solution: the formula of the first cleaning solution is: 1% sodium hydroxide, 1% potassium hydroxide, 1% sodium carbonate, 0.05% ethylenediaminetetra Sodium acetate, 0.1% sodium diethylenetriaminepentaacetate, 0.05% sodium nitrilotriacetate, 0.1% sodium citrate, 0.1% JFC, 1% OP-10, 0.1% pepina, 0.1% sodium pyrophosphate and the deionized water of the balance; and the second cleaning liquid formula is: 1% sulfuric acid, 1% citric acid, 1% oxalic acid, 0.5% tartaric acid, 0.02% ethylenediaminetetra Ace...

Embodiment 3

[0063] A method for recovering and reusing waste vanadium-tungsten-titanium-based denitration catalyst, the specific steps are as follows:

[0064] (1), take 0.003m 3 150mm×150mm×1100mm deactivated honeycomb catalyst V with operation over 24000h 2 o 5 -WO 3 / TiO 2 The catalyst is deashed by negative pressure vacuum equipment to completely remove the dust on the surface of the catalyst and in the pores.

[0065](2), prepare the first cleaning solution and the second cleaning solution: the formula of the first cleaning solution is: 1% sodium hydroxide, 1% potassium hydroxide, 1% sodium carbonate, 0.05% ethylenediaminetetra Sodium acetate, 0.1% sodium diethylenetriaminepentaacetate, 0.05% sodium nitrilotriacetate, 0.1% sodium citrate, 0.1% JFC, 0.1% OP-10, 1% pepina, 0.1% sodium pyrophosphate and the remaining amount of deionized water; the second cleaning liquid formula is: 5% sulfuric acid, 1% citric acid, 0.02% ethylenediaminetetraacetic acid, 0.1% nitrilotriacetic acid, ...

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Abstract

The invention relates to a recycling and reusing method of a waste vanadium tungsten titanium-based denitration catalyst. The method comprises: cleaning the waste vanadium tungsten titanium-based denitration catalyst by adopting first cleaning fluid and second cleaning fluid, drying and roasting. Optionally, the method further comprises: grinding the roasted recycled materials to prepare the 500-2000 mesh catalyst recycled materials and preparing the catalyst recycled materials into the waste vanadium tungsten titanium-based denitration catalyst. The waste catalyst is cleaned at two steps to remove total harmful toxic components of the waste catalyst. The method uses two kinds of cleaning fluid to ensure that the recycled materials are directly used for preparing the catalyst. The method can realize secondary use of the waste smoke denitration catalyst, realizes recycle of resource, reduces cost, saves energy, reduces environment protection control difficulty and is high in comprehensive benefits.

Description

technical field [0001] The invention belongs to the field of flue gas purification, and in particular relates to a method for recycling waste vanadium-tungsten-titanium-based denitration catalysts. Background technique [0002] Selective Catalytic Reduction (Selective Catalytic Reduction, referred to as "SCR") is the most widely used method for controlling nitrogen oxide emissions in coal-fired power plants in my country, and the core of the SCR method is the catalyst. Currently the most commonly used commercial SCR denitration catalyst is V 2 o 5 -WO 3 / TiO 2 series (vanadium-tungsten-titanium-based depinning catalyst), V 2 o 5 -WO 3 / TiO 2 In the actual application process, due to catalyst poisoning, pore blockage, wear and other reasons, the catalyst activity is reduced and the structure is destroyed, and it is discarded. The life of the catalyst is generally 2 to 4 years. According to statistics, the domestic demand for selective catalytic reduction reaction deni...

Claims

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Application Information

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IPC IPC(8): B01J38/64B01J38/62B01J23/30B01D53/96B01D53/86B01D53/56
CPCB01D53/8628B01D53/96B01J23/30B01J38/62B01J38/64B01J2523/00B01J2523/47B01J2523/55B01J2523/69
Inventor 李春启梅长松王旭金段世慈冯巍陈爱平
Owner DATANG INT CHEM TECH RESINST
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