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Activation regeneration solution for SCR flue gas denitrification catalyst and preparation method thereof

A technology of denitration catalyst and regeneration liquid, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of promoting dissolution

Active Publication Date: 2016-02-24
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an activation regeneration solution for SCR flue gas denitrification catalyst in coal-fired thermal power plants and its preparation method, so as to solve the technical problem that the catalyst cannot be regenerated online

Method used

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  • Activation regeneration solution for SCR flue gas denitrification catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Weigh 153g of ammonium metavanadate (accounting for 0.8wt% of the total activation solution mass percentage), 2000g of ammonium tungstate (accounting for 10.4wt% of the total activation solution mass percentage), 1000g of ammonium paramolybdate (accounting for the total activation solution mass percentage of 1000g) Percentage is 5.2wt%). At the same time, we weigh 100g of surface penetrant (JFC) to account for 0.5wt% of the total mass of the activation solution. Dissolve the above formula in 15000ml of deionized water. Percentage is 5.2wt%), the dissolution temperature of the above components is 20°C, after being completely dissolved, let it stand to prepare the regeneration activation solution.

[0031] 2. In the reactor of the existing SCR online activation experiment reaction device, load the deactivated honeycomb catalyst provided by Dongfang Kaiterui. After activation, the drying and roasting temperature is set at 300°C. The liquid is placed in a 100L plastic wa...

Embodiment 2

[0034] 1. Weigh 252g of ammonium metavanadate (accounting for 1.0wt% of the total activation solution mass percent), 2516g of ammonium tungstate (accounting for 9.5wt% of the total activation solution mass percent), 1500g of ammonium paramolybdate (accounting for the total activation solution mass percent of 1.0wt%), Percentage is 5.7wt%). At the same time, we weigh 126g of surface penetrant (JFC) and the percentage of total activation solution is 0.5wt%. Percentage is 7.6wt%), the dissolution temperature of the above components is 40°C, after being completely dissolved, let it stand to prepare the regeneration activation solution.

[0035] 2. In the reactor of the existing SCR online activation experiment reaction device, load the deactivated honeycomb catalyst provided by Dongfang Kaiterui. After activation, the drying and roasting temperature is set at 300°C. The liquid is placed in a 100L plastic water tank, and the activation liquid is sent to the activation reaction devi...

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Abstract

The invention provides an activated regeneration solution for a selective catalyst reduction (SCR) flue gas denitration catalyst. The activated regeneration solution comprises the following components in percentage by weight: 0.8-1.1 percent of ammonium metavanadate, 9.4-10.4 percent of ammonium tungstate, 4.9-5.7 percent of ammonium paramolybdate, 0.1-0.5 percent of surface penetrating agent, 5.2-8.4 percent of oxalic acid or dilute sulphuric acid and 74.6-78.7 percent of deionized water, and the temperature of the activated regeneration solution is 20-60 DEG C. Compared with the denitration efficiency after offline activation of a conventional SCR catalyst, the denitration efficiency of the catalyst reaches 85 percent after active ingredients of the catalyst are supplemented on line. Moreover, time and labor are saved, the operation is convenient, and catalyst activation is normalized.

Description

technical field [0001] The invention relates to the technical field of online activation of catalysts, in particular to an activation regeneration solution for SCR flue gas denitrification catalysts in coal-fired thermal power plants and a preparation method thereof. Background technique [0002] According to my country's "Twelfth Five-Year Plan", the total amount of nitrogen oxide (NOx) emissions in 2015 will be reduced by 10% compared with 2010. This goal has obviously become the potential driving force for the technical reform of boiler flue gas denitrification in many domestic thermal power plants. At present, more than 90% of the flue gas denitrification systems of domestic coal-fired thermal power plants use the SCR (Selective Catalyst Reduction, SCR) process. The catalyst, the core of the process, usually accounts for 40%-60% of the initial investment. In actual operation, oxides such as K, Na, As and fly ash contained in the flue gas are likely to poison and block ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/68B01J23/92
Inventor 盘思伟李丽陈冬林阮敏曾稀
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID