SU582812A1 - Gas flow purification filter - Google Patents

Description

(54) FILTER FOR CLEANING GAS FLOWS

The invention relates to the processes 1 |) of the filtration, in particular, to the devices of the gas cleaning technology, and can be used in the technological lines of gas cleaning from mechanical impurities. A filter for cleaning gas streams from mechanical impurities is known, comprising a housing filled with granular filleting material, a scraper device and nozzles for supplying and discharging gas l. The known filter is uneconomical in terms of the consumption of granular material, since during the operation of the filter, the entire layer of granular material is scraped off and removed to the depth of dust penetration. This leads to high costs of granular material and to increased energy consumption for its regeneration. Closest to the proposed filter, comprising a housing filled with granular material, inside which a louvered grating composed of conical rings and a hollow shaft connected to a rotating drive 2 are placed. The gas stream is cleaned from mechanical impurities by passing a stream through the layer of granular material. The gas flow is evenly distributed throughout the volume and in its movement it contacts with particles of granular material. The gas is dust free. In doing so, the particles ached are removed from the filter housing together with a portion of the layer of granular material. A disadvantage of the known filter is increased flow rate. granular material due to the fact that, when removing contaminants, a layer of granular material is removed with them. In addition, in a known filter, the thickness of the granular layer (the distance between the louvers along the radius) is the same across the entire height of the filter, which leads to a large slip of dust due to high gas flow rates, since there is little resistance, or to breakthrough granular material from build. The purpose of the invention is to reduce the consumption of .. grained material.

For this purpose, the Irish Shaft is equipped with a nozzle inlet trap, placed at its height, and connected to a vacuum angle.

With the conical rings of the louvre grille, with a decreasing radius in the directions of movement of the gas log.

The drawing shows the construction of the proposed filter, a general view. ,

Inside the cylindrical body 1, a filter is placed on a pit lattice consisting of conical rings 2 and a hollow shaft 3. On the shaft there are branch pipes 4. The rods of the louvre lattice are made with a decreasing radius in the direction of the gas flow. The upper end of the shaft is fixed to the bearing housing 5 and connected to the vacuum tube 6, the internal cavity of which is isolated from the working chamber 7 of the filter by a labyrinth seal 8. The vacuum tube is placed in the inlet 9. The lower end of the shaft is fixed in the bearing 10 and the free part It is connected to the electric motor 11. The outlet nozzle 12 is located in the lower part of the housing, and in the upper part of the crinker 13 there is a loading hatch 14. The working chamber 7 between the louvres and gratings is filled with granular filter material.

The filter works as follows.

The dust-laden gas is supplied from the working chamber 7 through the inlet 9, Passing through a layer of granular material, the gas is released; from dust to leaves the body through the outlet nozzle 12, dust accumulates on the surface of the granular material, partially deepening the thickness of the backfill, the front layer of dust, being an auto filter, increases all the time, causing the filter resistance to the advancement of the gas to be cleaned. When the specified resistance is reached, a vacuum is created in the vacuum tube 6 and the electric motor is switched on) 11. The branch pipe 3 is connected 4, connected through the shaft 3 to the vacuum pipe 6, moving as a result of the shaft rotation on the dust placement surface, pulling it through the vacuum tube ts filter. The filter resistance drops, the electric motor to the vacuum tube is broken down, and on the surface of the filter material. again a layer of dust begins to build up. Implemented in a manner that regenerates filtering

the granular material does not completely remove the dust, the dust, penetrating to a greater depth, remains.

When the remaining dust causes the specified maximum resistance, the vacuum pipe switches to a more intensive suction mode and part of the filter is removed together with the dust. magialrial to restore minimum resistance. From the top of the filter into the working chamber, into the space of the louvered grilles, fresh filtering grain material flows and the filter continues to work.

Since the distance between the lattices of the lattice 2 in the upper part of the filter is greater than the lower one, during operation of the filter, when fresh material enters, the same differential pressure is maintained throughout the filtration surface and the material is eliminated.

Placing the nozzles on the filter shaft and making the louvre grill rings with a decreasing radius in the direction of the gas flow will significantly reduce the consumption of granular material.

Claims (2)

1. A filter for cleaning gas streams from mechanical impurities, comprising a body filled with granular material, inside which is placed a small grating consisting of conical rings and a hollow shaft connected to a rotational drive, characterized in that With a deluxe consumption of granular material, the hollow shaft is equipped with branch pipes and fittings placed at its height, and is connected to a vacuum .. 2. The filter according to claim 1, wherein the conic rings of the louvre grating are made with a decreasing radius in the direction of the gas flow, Scammers information taken into account during the examination; 1, USSR Copyright Certificate No. 24934Г „cl. On 01 D 23/12, 1968. 2. USSR author's certificate No. 440145, cl. On 01 D 46/12, 1973. ft 3 Gas , / g Purified C