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Selective catalytic reduction denitration catalyst regeneration technology

A denitration catalyst and catalyst technology are applied in the direction of catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., which can solve the problems of increasing the cost of the regeneration process and polluting the environment by harmful metal compounds, and achieve low regeneration costs. Environmentally friendly, low conversion effect

Inactive Publication Date: 2019-08-20
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dissolving compounds containing vanadium or tungsten in the regeneration active liquid will not only increase the cost of the regeneration process, but also further pollute the environment with harmful metal compounds

Method used

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  • Selective catalytic reduction denitration catalyst regeneration technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 Shown, a kind of SCR denitration catalyst regeneration process, concrete steps are:

[0029] (1) Catalytic oxidation: CO (Catalytic Oxidizer, CO) catalytic oxidation furnace is used, and the deactivated SCR denitration catalyst module (150×150×1000mm) is placed in the catalytic oxidation furnace for catalytic oxidation treatment. The catalytic oxidation furnace uses the action of the catalyst to reduce the activation energy of organic matter, so that the oxidation temperature of organic matter is lowered to a relatively low temperature (such as 300°C) to completely oxidize and decompose, and generate CO 2 and H 2 O. This process oxidizes the remaining carbon in the deactivated SCR denitration catalyst to carbon dioxide, and separates it from the SCR denitration catalyst in gaseous form, thereby removing the carbon remaining in the SCR denitration catalyst. Then, the furnace temperature of the catalytic oxidation furnace was raised to 500° C., the cat...

Embodiment 2

[0034] The treatment process and operating conditions are the same as in Example 1, except that in step (1), the temperature of the catalytic oxidation furnace is raised to 550° C., and the catalyst module is calcined at this temperature for 1.5 hours. The results showed that the denitrification activity of the regenerated catalyst was significantly improved, and its activity could recover to 94.3% of the activity before poisoning.

Embodiment 3

[0036] Treatment process and operating conditions are the same as in Example 1, and the difference is that the cleaning solution preparation method described in step (3) is: take by weighing polyoxyethylene lauryl ether phosphate ammonium salt 0.05Kg, fatty amine (alkyl Amine) polyoxyethylene ether (concrete model is AC-1210) 0.05Kg (0.2%), weigh the sulfuric acid 49.90Kg (99.8%) that acid molar concentration is 0.5mol / L, stir for 15 minutes, make it mix evenly, prepare into 50Kg cleaning solution. The results show that the denitrification activity of the regenerated catalyst is significantly improved, and its activity can recover to 91.3% of the activity before poisoning.

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Abstract

The invention provides a SCR denitration catalyst regeneration technology. The SCR denitration catalyst regeneration technology is characterized by comprising the steps of conducting catalytic oxidation treatment on an inactivated SCR denitration catalyst by means of a catalytic oxidation furnace to oxidize carbon which remains in the catalyst to carbon dioxide, so as to separate the carbon in a gaseous state and the catalyst; then elevating catalytic oxidation furnace temperature, calcining the SCR denitration catalyst at the temperature, and taking out the SCR denitration catalyst after theSCR denitration catalyst is cooled to room temperature; washing the SCR denitration catalyst, which is subjected to catalytic oxidation, with deionized water, and then conducting drying treatment; then conducting vacuum suction on the SCR denitration catalyst, which is subjected to drying treatment, by means of a vacuum suction pipe to pump out substances which are attached into micropores of thecatalyst and block the micropores of the catalyst; and placing the SCR denitration catalyst, which is subjected to vacuum suction, in cleaning liquid for soaking, and scouring the catalyst with the cleaning liquid to completely wash out impurity components in the catalyst. The SCR denitration catalyst regeneration technology has the characters that a regeneration effect is good, the SO2 / SO3 conversion rate is low, the regeneration cost is low, the SCR denitration catalyst regeneration technology is environmentally friendly, and the like.

Description

technical field [0001] The invention relates to the technical field of catalyst regeneration, in particular to a novel selective catalytic reduction (SCR) denitrification catalyst regeneration process. Background technique [0002] With the development of my country's economy and industry, primary energy consumption is increasing year by year. It is estimated that by 2050, my country's primary energy demand will reach 66.574 million tons. According to 2016 BP statistics, China consumes about 50% of the world's coal, ranking first in the world. There is no doubt that for a long period of time in the future, China's coal-based energy supply pattern will not undergo fundamental changes, and it is difficult for coal to account for less than 50% of total energy. However, more than 80% of the coal consumed in China is directly or indirectly used for combustion, generating a large amount of SO 2 , NO x , Hg and other flue gas pollutants, causing serious air pollution problems. ...

Claims

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Application Information

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IPC IPC(8): B01J38/02B01J38/12B01J38/48B01J38/52B01J38/60B01D53/96
CPCB01D53/96B01J38/02B01J38/12B01J38/48B01J38/485B01J38/52B01J38/60
Inventor 仇中柱廖鑫郭瑞堂官贞珍刘建全袁一鸣
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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