Method and device applied to in-situ regeneration of sulfur-poisoning SCR denitration catalyst

A denitration catalyst, in-situ regeneration technology, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of improving catalytic activity, reducing decomposition temperature, and efficient regeneration and recovery
CN107376930AActive Publication Date: 2017-11-24CHONGQING UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2017-11-24

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Abstract

The invention provides a method and a device applied to in-situ regeneration of a sulfur-poisoning SCR denitration catalyst. The method comprises the following steps: pre-oxidizing part of smoke before entering to an SCR denitration reactor when the SCR denitration catalyst is deactivated by sulfur poisoning, oxidizing part of NO in the smoke, then enabling the smoke to enter into the SCR denitration reactor, accelerating decomposition of ammonium sulfate on the surface of the catalyst, and carrying out regeneration process of the catalyst. The device applied to in-situ regeneration of the sulfur-poisoning SCR denitration catalyst comprises an ozone generator, an electromagnetic valve, an SCR denitration reactor and a smoke NOx component online monitor. The method and the device are capable of effectively decomposing ammonium sulfate deposited on the surface of the catalyst under the condition with temperature of 200-380 DEG C; the activity of the treated sulfur-poisoning catalyst is improved; the service life of the catalyst is prolonged; the replacement cost of the catalyst is reduced.
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Description

technical field

[0001] The invention relates to the field of selective catalytic reduction (SCR) denitration catalysts, in particular to an in-situ regeneration method and device for sulfur poisoning SCR denitration catalysts. Background technique

[0002] In the two sessions in 2017, the government work report mentioned: to increase the protection and governance of the ecological environment. Accelerating the improvement of the ecological environment, especially the air quality, is the urgent desire of the people and the inherent requirement of sustainable development. Nitrogen oxides (NO x ), as one of the main pollutants in the atmosphere, contributes to the formation of acid rain, photochemical smog and haze. In recent years, the state has proposed stricter nitrogen oxide emission standards for coal-fired power plants, glass factories, cement factories, iron and steel enterprises and other small industrial furnaces. Among various nitrogen oxide control technologies, s...

Claims

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