Thermal power plant flue heat exchanger ash removing device

Abstract

The invention discloses a thermal power plant flue heat exchanger ash removing device. The thermal power plant flue heat exchanger ash removing device comprises a shell, an ash removing assembly and an ash collecting assembly. An accommodating space is formed in the shell, a flue gas inlet and a flue gas outlet are formed in the shell, and the flue gas inlet and the flue gas outlet are opposite in position; the ash removing assembly comprises an ash removing main pipe, an ash removing branch pipe, an air pump and a driving motor, one end of the ash removing main pipe is connected with the air pump, the other end of the ash removing main pipe is connected with the driving motor, and the ash removing branch pipe is arranged on the ash removing main pipe in a communicating mode and located in the accommodating space; the ash collecting assembly comprises an ash collecting pipe, an ash collecting box and an ash collecting bag, and the top and the bottom of the ash collecting pipe correspondingly communicate with and are connected with the bottom of the shell and the top of the ash collecting box; and the ash collecting bag is arranged in the ash collecting box. According to the thermal power plant flue heat exchanger ash removing device, ash removing can be effectively and comprehensively carried out a heat exchange tube and a heat exchange box, and meanwhile, the equipment is convenient to disassemble, assemble and maintain.

Description

Technical field [0001] The present invention relates to a flue gas cleaning technology, and more particularly, to a power plant flue gas heat exchanger cleaning apparatus. Background technique [0002] Currently internal thermal power plant flue exhaust gas temperature is higher than the actual design of the exhaust gas temperature, with the implementation of energy conservation advocates, most of the thermal power plant at the rear of the boiler flue installation of heat exchangers to reduce the temperature of the smoke, thereby increasing energy utilization, improve air quality and ensure security of supply. Range flue exchanger used in the flue, and a low-load operation due to the large low velocity flue gas backpass ash concentration led to the bottom of the body and the front heat exchanger fouling flue serious problem, resulting in heat exchanger the effective heat transfer area is reduced, the flue gas flow cross sectional area becomes smaller, the boiler combustion pressu...

AI Technical Summary

Problems solved by technology

The range of use of the flue heat exchanger is in the flue. Due to the high concentration of fly ash in the tail flue and the low flow rate of the flue gas during low-load operation, the problem of ash accumulation at the bottom of the heat exchanger body and the front flue is serious, resulting in heat transfer. The effective heat exchange area of ​​the boiler decreases, the cross-sectional area of ​​the flue gas flow becomes smaller, and the boiler is fired under positive pressure, which leads to insufficient boiler output and increased smoke exhaust loss.

However, the traditional cleaning of the heat exchanger is mainly to purge the surface of the heat exchanger through the soot blower, which has a limited blowing area and cannot effectively and comprehensively clean the heat exchange tubes and heat exchange boxes of the heat exchanger. Cleaning work

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