RU1775141C - Method of dust trapping in grained filters - Google Patents

Abstract

FIELD OF THE INVENTION This invention relates to methods for purifying dusty air on particulate filters and can be used in mining and other industries. The method of collecting dust in granular filters is carried out by passing a stream of dusty air through a layer of granular material, followed by regeneration of a layer of granular material. A stream of dusty air is supplied to the layer of granular material from the windward side evenly over the entire layer of granular material with the speed of its entry into the UHC layer (0.8-1.2) UV, where UV is the filtration rate, m / s.

Description

The invention relates to methods for purifying dusty air in particulate filters and can be used to collect dust in mining and other industries.

The goal is to increase the cleaning efficiency in granular filters by stabilizing the deposition process in the layer of granular material and intensifying it in the autofilter dust deposit formed on the windward side of the granular material layer.

The method of cleaning air from dust is implemented as follows.

Air purification is carried out in a layer of granular material of a fraction of 1.0-1.6 mm, placed in a cassette with dimensions of 360xt60x x 10 mm, The fine-grained marbled and cement dust of 1000 g for each experiment is used as the initial one. Its concentration in the cleaned air is 1600 mg / m3, and the amount of air itself is 72.1 m3 / h.

Before the start of the experiment, an existing high-speed granular filter operation mode is created at the production site. For this, in the fourth part of the area of the layer, an inlet speed of 1.1 m / s is maintained, which is 3.1 times higher than the rational filtration rate and ensures a uniform distribution of dusty air supplied to the treatment

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The measurement shows that the amount of dust deposited in the layer of granular material lies in the range from 410 to 460 g. This corresponds to an air cleaning efficiency of 41-46%.

Uniform distribution of dusty air throughout the layer is carried out using switchgears. This provides a value of 8-1.2.

Subsequent measurements show that the amount of dust deposited in the layer

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it is from 710 to 740 g, and the efficiency of air purification is 71-74%. Using the proposed method of purifying air from dust in granular filters allowed to increase the degree of purification by 1.6-1.7 times.

The drawing shows a graph of eot y (o - marble dust, x-cement dust).

The proposed method of cleaning air from dust can be implemented on any granular filter.

Using the method of air purification from dust allows you to:

to improve the process of cleaning dusty air in granular filters by stabilizing it in the filtering layer of granular material and intensifying it in an autofilter dust sediment:

Claims (1)

increase the efficiency of granular filters and, thanks to this, reduce dust emissions into the atmosphere by 1.6-1.7 times. The claims Method for collecting dust in granular filters, by passing a stream of dusty air through a layer of granular material, followed by regeneration of a layer of granular material, characterized the fact that, in order to increase the degree of purification of dusty air, by stabilizing the deposition process in the layer of granular material and intensifying the formation of dust sediment on the windward side layer, the supply of dusty air is carried out uniformly over the entire layer of granular material with the speed of its entry into the UVx layer (0.8-1.2) UV, where UV is the filtration rate, m / s. 0.5 1.0 15 2.0 2.5 3.0 3.5 # 0ЈЈффшрер {п а0Јм0л / (0 // е / п  F  e0.  15 2.0 2.5 3.0 3.5 reg {n a0Јm0l / (0 // e / pi  F  e0.