Mobile particle layer filter, high temperature gas filtration and dust removal system and method

Abstract

The invention discloses a mobile granular layer filter, a system and a method for filtering and removing dust from high-temperature gas. An air inlet (18) is installed at the filter air inlet (14) of the mobile granular layer filter, and the high-temperature dust-laden gas After passing through the air inlet part (18) and the air inlet blocking material (16), it enters into the filter housing (11), and the moving particle layer filter is also provided with a filter that extends into the air inlet. Part (18) and a dust blowing device for blowing gas to the intake block (16), to clean the dust deposited on the intake block (16) and the upstream surface of the filter medium. The mobile particle layer filter of the invention has good filtering effect and stable operation.

Description

technical field [0001] The invention relates to the field of high-temperature gas dust removal, in particular, to a mobile particle layer filter for high-temperature gas dust removal, a high-temperature gas filtering and dust removal system and a filtering and dust removal method including the mobile particle layer filter. Background technique [0002] In chemical, petroleum, metallurgy, electric power and other industries, high temperature dusty gas is often generated. Due to the needs of different processes or in order to meet environmental emission standards, these high-temperature dust-laden gases need to be dedusted. For example, some pyrolysis processes (eg, fluidized bed pyrolysis, rotary kiln pyrolysis, gas flow riser heating) contain or target wide-grained coal or pulverized coal, and these processes produce relatively large amounts of coal during pyrolysis. If the dust is not removed from the gas in time, once the temperature drops, the dust will bond with the con...

AI Technical Summary

Problems solved by technology

[0005] However, when the high-temperature dusty gas enters the partition cylinder 3' from the bell mouth at the lower end of the intake pipe 5', there must be certain inhomogeneity in the distribution of the filter material in the partition cylinder 3', especially in the partition cylinder. The junction of 3' and filter cone 4' is prone to uneven distribution of filter material, so it is difficult to ensure that the high-temperature dust-laden gas can be discharged uniformly along the circumference of the bell mouth (that is, it is difficult to uniformly discharge along the 360-degree direction around the intake pipe). discharge), so when the device is in use, the airflow is easy to deviate and the filtering effect is reduced

And because the device adopts the structure of downstream feeding and countercurrent filtration, the pressure drop of the system is relatively large, which also leads to the reduction of its filtering effect.

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