A granular bed filter dust removal device

Abstract

The invention discloses a particle bed filter and dust removal device, which comprises an outer shell, the top of which is provided with a dust-containing gas inlet, the bottom is provided with a dust discharge port, and the inside is provided with at least two layers of particle bed filters along the vertical direction. There is a back blowing gas settling chamber, the gap between the inner wall of the outer shell and the outer periphery of the particle bed filter is used as the air flow chamber, the back blowing gas settling chamber runs through at least two layers of particle bed filters from the lowest layer, the back blowing gas settling chamber and the The dust outlet is connected, and the particle bed filter that is not penetrated by the back blowing gas settling chamber includes at least one filter unit, and the particle bed filter that is penetrated by the back blowing gas settling chamber includes at least two filter units and is distributed in the back blowing gas settling chamber On both sides of the airflow chamber, the blowback gas settling chamber is connected with the dust-laden gas vent, and the dust-laden gas vent is provided in the blowback gas settling chamber with a first inertial separator at an angle of 10° to 45° from the vertical direction. Deflector; the advantage is that it can make the blowback air flow downward, effectively ensuring the dust to settle and discharge.

Description

technical field [0001] The invention relates to a filter and dust removal device, in particular to a particle bed filter and dust removal device. Background technique [0002] The granular bed filter dust collector adopts high temperature resistant granular filter material, which has unique advantages in the field of high temperature gas dust removal. [0003] For example, the invention patent "a granular bed filter dust collector" announced by China (application date is January 31, 2007, publication number is CN101036846A, patent number is ZL200710067109.7), which includes an outer shell and a shell set along the height direction There is at least one layer of filtering device in the body. The upper part of the outer casing is provided with a dust-containing gas inlet, and the lower end of the outer casing is provided with a dust outlet. The filtering device is equipped with an independent gas reversing device, which is connected to a clean gas main pipe and The back blowi...

AI Technical Summary

Problems solved by technology

However, in such an arrangement, since the blowback air volume of the particle layer in the inner casing is 1.5 to 2.5 times the filtered air flow rate of the particle layer in the inner casing, it will cause the lowest inner layer of the second layer. The blowback gas of the particle layer in the shell cannot be accepted by the particle layer in the inner casing of the lowest first layer, which will cause the backflush gas to carry the dust and flow upwards, while the particle bed filters the inner layer of the lowest first layer in the dust collector. The blowback air of the particle layer in the shell can only flow upwards, causing the dust to swirl between the lowest first layer and the lowest third layer, affecting the dust settlement and discharge

In order to make the blowback gas flow downward, although it is possible to use air suction at the lower part of the particle bed filter dust collector to force the blowback gas and dust to be drawn from the lower part and circulate back to the dusty gas inlet of the particle bed filter dust collector, this will not only Dust is repeatedly filtered, the filter load is increased, and the blades in the circulating fan are severely worn, especially when the temperature is high and the dust hardness is high, the blades in the circulating fan are more severely worn, and when the gas contains a lot of tar vapor , the anti-tarring in the circulating fan is also a big problem to be solved

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