Soot blower suitable for SCR denitration of high-temperature and high-dust flue gas

A technology of sootblower and flue gas, which is applied in the direction of cleaning method using gas flow, gas treatment, cleaning method and utensils, etc. It can solve the problems of amazing compressed air consumption, limited coverage area, unstable operation, etc., and achieve local solution Dust accumulation and clogging, prevention of local excessive force, uniform blowing force
CN111408267APending Publication Date: 2020-07-14BEIJING SPC ENVIRONMENT PROTECTION TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING SPC ENVIRONMENT PROTECTION TECH
Publication Date
2020-07-14

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Abstract

The invention provides a soot blower suitable for SCR denitration of high-temperature and high-dust flue gas. The soot blower comprises an air supply unit, a control air valve unit, a gas transmissionheader pipe, and a nozzle unit, wherein the air supply unit is hermetically connected with one end of the air transmission header pipe through the control air valve unit; a gas transmission branch pipe is arranged on one side of the gas transmission header pipe; the nozzle unit is fixedly connected to the gas transmission branch pipe; wherein the nozzle unit is of a flat structure; according to the invention, the flat nozzle is adopted; the injection area and the effective effect are larger than those of the traditional circular injection hole; the soot blower is simple in structure and uniform in blowing force in a coverage area, can effectively prevent excessive local stress and damage to the surface layer of the catalyst, is mounted on the side of a certain distance above the surface layer of the catalyst, can effectively solve the problem of a blowing dead zone of a traditional soot blower, and solves the problems of local soot accumulation and blockage.
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Description

technical field

[0001] The invention relates to the technical field of environmental protection, in particular to a soot blower suitable for SCR denitrification of high-temperature and high-dust flue gas. Background technique

[0002] As the emission standards of air pollutants in the cement industry become more stringent, the emission limits of nitrogen oxides in cement kiln and kiln tail flue gas are approaching the ultra-low emission limits of the thermal power industry. The nitrogen oxide treatment of cement kiln tail gas adopts SCR process technology, which can stably meet the most stringent emission requirements. SCR is to install a catalytic reactor at the outlet of the cement kiln preheater, spray a reducing agent (such as ammonia or urea) in front of the reactor, and under the appropriate temperature (300-400 ° C) and catalyst action, the flue gas Nitrogen oxides are reduced to nitrogen and water. This method does not require reheating and consumes a lot of energy...

Claims

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