Heat primary air circulation anti-blocking device based on combustion bitumite and anthracite boiler rotary air preheater

Abstract

The invention relates to a heat primary air circulation anti-blocking device based on a combustion bitumite and anthracite boiler rotary air preheater. The device comprises a primary air inlet air box; the primary air inlet air box is divided into a heating separation bin and a cold primary air bin by a fan-shaped plate; the heating separation bin is arranged near a smoke side; the heating separation bin is connected with a primary air outlet air way of an air preheater through a circulating fan; and heat primary air of higher than 300 DEG C is extracted from the primary air outlet air way through the circulating fan to heat and scour heat exchange elements passing through the heating separation bin. As the heat exchange elements at a primary air side cold end of the air preheater are heated, the surface moisture condensation and ash attachment capacity of the heat exchange elements at the cold end of the air preheater can be thoroughly eliminated, and the blockage problem of the rotary air preheater is radically solved.

Description

technical field [0001] The invention relates to a hot primary air circulation anti-blocking device, in particular to a hot primary air circulation anti-blocking device based on a rotary air preheater of a boiler burning bituminous coal or anthracite. Background technique [0002] The air preheater is the heating surface where the flue gas in the flue at the tail of the boiler preheats the air before entering the boiler to a certain temperature through the internal cooling fins. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption. Power plant boilers often use a rotary preheater with a heating surface. The application in the boiler is generally two compartments, three compartments, and four compartments. Among them, the four compartments are more commonly used in circulating fluidized bed boilers. [0003] Since the rotor of the air preheater is constantly rotating during operation, the temperature gradually rises when the ...

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Problems solved by technology

[0012] The object of the present invention is to provide a hot primary air circulation anti-blocking device based on the rotary air preheater of the boiler burning bituminous coal and anthracite, so as to solve the problem caused by the low temperature of the heat exchange element at the cold end of the air side of the air preheater. Starting with the root cause of dust blocking, by heating the heat exchange element at the cold end of the primary air side of the air preheater, it can completely eliminate the ability of condensation and dust on the surface of the heat exchange element at the cold end of the air preheater, and fundamentally solve the problem of rotary air preheater. heater clogging problem

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