Filter bag dust remover with self-circulating ash removal device

Abstract

The invention relates to a dust remover, and concretely relates to a filter bag dust remover with a self-circulating ash removal device. The dust remover comprises a base support, an airflow uniform distribution and flow guiding device, a filter bag chamber, an air purifying chamber, a filtering assembly, a self-circulating ash removal system, an ash bucket, an electric control system, a heat insulation layer, a platform, a stair and a pre-coating system; an air inlet is provided with the airflow uniform distribution and flow guiding device, forward and upward airflow channels are arranged in a bag zone, filter bags are arranged in a rectangular chamber in groups, the mouths of a plurality of the filter bags are compressed through bolts through a steel plate to make the filter bags be firmly clamped in the hole of a tube sheet, the tube sheet is provided with a filter bag hole, a hole plate is smooth without burrs, and the filter bags form a double sealing structure at the upper portion of the tube sheet and in the hole of the tube sheet. The dust remover adopting low pressure air generated by a centrifuge fan to purge in order to close and leakage-free ash removal has the advantages of blowing effect guaranteeing, no light damages to the filter bags, and safe and reliable running, and adopts programmed control to purge row by row in sequence in order to realize the ash removal purpose.

Description

technical field [0001] The invention relates to a dust collector, in particular to a filter bag type dust collector with a self-circulation dust removal device. Background technique [0002] Filter bag dust collector is the mainstream technology for flue gas dust removal in coal-fired power plant boilers. It is composed of ash hopper and electrical control system. [0003] The working principle of the filter bag dust collector is: the dusty flue gas from the boiler enters the filter bag dust collector through the flue of the flue gas inlet, and under the negative pressure of the boiler induced draft fan installed behind the dust collector, the dusty flue gas passes through and The air intake bell of the dust collector enters the bag filter, and passes through the air distribution plate of the filter bag filter to ensure the flow distribution of the flue gas before entering the filter bag bundle, avoiding the local dust-laden gas flow rate that is too fast to cause damage to...

AI Technical Summary

Problems solved by technology

Filter bag service life is reduced, usually no more than 3 years

[0012] d. Due to the installation of the nozzle above the filter bag for the blown dust collector, it is extremely inconvenient to replace the filter bag and bag cage

[0013] e. The dust collector of line blowing adopts a circular filter bag to occupy a large area and the volume of the dust collector is large; although the dust collector of the rotary jet is a flat filter bag, it adopts an overall circular arrangement, and the volume of the four corners is wasted. The volume is also large;

[0014] f. The most critical thing is that the purge air source enters the dust collector, which increases the load of the induced draft fan of the boiler and increases the energy consumption

And produce fluctuating load (large when purging, small when not purging)

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