Anti-blocking air pre-heater with purging function, intelligent control and additionally provided with soot blower in middle

Abstract

The invention discloses an anti-blocking air pre-heater with a purging function, intelligent control and additionally provided with a soot blower in middle. The soot blower is additionally arranged in a rotor heat transfer element of the air pre-heater, so that the purging effect of a soot blowing system of the air pre-heater is greatly improved; an ultrasonic generator is additionally arranged on a high-temperature steam inlet pipeline of the air pre-heater soot blower, so that the soot blower has a blockage blowing function during operation, meanwhile, dirt on the surface of a certain heat exchange element is stripped, and steam soot blowing and a cleaning function are achieved at the same time; the blockage condition of a heat transfer element in each bin position of the air pre-heater is accurately monitored; the intelligent digital air pre-heater monitoring and control system accurately controls the temperature, the pressure and the distribution condition of a flow field of a bin area and monitors ash deposition on the surface of the heat exchange element and analyzes the ash deposition trend. The air pre-heater can fully adapt to a pulverized coal boiler with an SCR denitration system, can replace a traditional rotary air pre-heater, and solves the problem that heat transfer elements are frequently blocked after denitration of the pulverized coal boiler.

Description

technical field [0001] The invention relates to the technical field of boilers, and is an important device for the boiler to reduce the exhaust gas temperature, increase the supply air temperature, and realize energy saving and emission reduction. The invention can be fully applied to the pulverized coal boiler equipped with the SCR denitration system, can replace the traditional rotary air preheater, and solve the problem of frequent blockage of heat transfer elements after denitration of the pulverized coal boiler. Background technique [0002] With the continuous improvement of the country's environmental protection requirements, the NOX (nitrogen oxides) emission indicators of boilers are getting lower and lower. No matter whether SCR or SNCR denitration methods are used, the formation of ABS (ammonium hydrogen sulfate) products cannot be avoided. The ABS product will condense at a certain temperature. It will condense from a gaseous state to a liquid state below 220 deg...

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Problems solved by technology

[0009] In view of the above needs, the purpose of the present invention is to use an anti-blocking rotary air preheater with a purging function, an intelligent monitoring and control system, and a soot blower installed inside the rotor to solve the frequent blockage of heat transfer elements after denitrification of pulverized coal boilers The problem

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