Thermal power plant air pre-heater and using method thereof

Abstract

The invention discloses a thermal power plant air pre-heater which comprises a movable box body, wherein the upper end of the movable box body is sequentially provided with a first mounting cavity and a second mounting cavity from front to back, a filtering device is installed in the first mounting cavity, and a gas mixing device is installed in the second mounting cavity; the gas mixing device comprises a connecting frame, a first telescopic air box and a second telescopic air box, the first telescopic air box and the second telescopic air box are connected to the two ends of an opening in the middle of the connecting frame, the front end of the first telescopic air box is connected to a square exhaust tube through a first rectangular flange, and lead screws are arranged on the two sides of the second mounting cavity and penetrate through the side edges of the connecting frame; and the lead screws are driven by motors. The filtering device and the filtering mechanism are convenient to disassemble and assemble, so that subsequent maintenance and replacement are facilitated; and meanwhile, tail gas can be filtered firstly during use, and impurities in the tail gas are effectively prevented from being mixed with air, so that the tail gas and air are fully mixed, and the air heating efficiency of the tail gas is improved.

Description

technical field [0001] The invention belongs to the technical field of air preheaters, and in particular relates to an air preheater in a thermal power plant and a method for using the same. Background technique [0002] The air preheater is also called the air preheater. Its function is to use the heat of the flue gas at the tail flue of the boiler to heat the air entering the boiler, thereby reducing the loss of exhaust smoke, increasing the temperature of the inlet air, and improving the efficiency of the boiler. The existing air preheater does not have the function of filtering the exhaust gas, which pollutes the air after mixing with the air entering the boiler, which is not conducive to the full combustion of boiler fuel, and the exhaust gas and air are not mixed sufficiently, which affects the temperature of the boiler intake air. Therefore, we A thermal power plant air preheater and its use method are proposed to solve the problems mentioned in the above-mentioned ba...

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Problems solved by technology

The existing air preheater does not have the function of filtering the exhaust gas, which pollutes the air after mixing with the air entering the boiler, which is not conducive to the full combustion of boiler fuel, and the exhaust gas and air are not mixed sufficiently, which affects the temperature of the boiler intake air. Therefore, we Propose a kind of thermal power plant air preheater and its use method, to solve the problems mentioned in the above-mentioned background technology

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