SU704646A1 - Grain filter - Google Patents

Description

(54) GRAIN FILTER

one

The present invention relates to the field of gas and dust purification and can be applied for filtering gas heterogeneous systems with a solid dispersed phase under conditions of high temperatures, as well as at high pressures in the production of regeneration.

A granular filter is known that includes a cylindrical body with nozzles for supplying dusty and purge gases and discharging cleaned gas or dust, cylindrical filter cassettes with a loose granular layer and a device for regenerating them, formed in the form of a pipe with holes and located outside the working area of the filter cassettes

The disadvantage of this apparatus is the low regeneration efficiency, as well as the location of the nozzles for purge gas outside the working area of the filtered cassettes, which during the regeneration of the granular layer leads to an uneven outflow of the pulsed flow through the filter elements and causes the filter cassettes to gradually overgrow.

The pelting of the present invention is to improve the process of regenerating the granular layer, preventing the filter cartridges from clogging up with dust. This is achieved by the fact that the holes are made in the form of annular venturi tubes with necks decreasing in the direction of flow of the purge gas.

Moreover, the annular slots are located directly beneath each filter cassette, and the geometry of the slots (annular venturi tubes) provides gas outflow with minimal coefficients of local resistance.

FIG. 1 shows a granular filter;

in fig. 2 - section A - D of FIG. one; in fig. 3 - section B - B of FIG. one; in fig. 4 - section B-B of FIG. 2

The granular filter includes a housing 1 with nozzles of the dusty gas inlet 2, filter cassettes 3 with upper retaining grids 4, gas-tight partitions 5, 6, 7 and 8, granular layer 9, lower retaining grids 10, clean gas duct II, damper 12, clean collector gas 13, pipe 14, a pipe to remove dust 15. A granular filter works as follows .. Dusty gas under pressure enters through pipe 2, located tangentially in the housing 1, passes through the upper retention grids 4, the granular layer 9, is formed first gastight partitions 5, 6, 7 and 8 and the lower retaining grids 10 is fed pure gas via gas ducts 11 in the clean gas manifold 13 consumer or discharged to the atmosphere. When a certain resistance is reached in the filter, the filter cassettes are alternately subjected to regeneration by compressed gas pulses supplied through pipe 14. All regeneration operations of the filter cassettes are carried out automatically. Before the impulse of compressed gas is supplied through the pipe 14, the valve 12 is automatically closed, the movement of gas in the cassette is stopped; after the impulse is applied, when the dust is deposited in the bunker of the apparatus, the flap 12 automatically opens. The use of a granular filter in the purification of catalytic cracking catalytic catalyst regeneration gases. Will allow to catch the road gas.

704646

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Claims (2)

Figure 1 is a standing product that is currently released into the atmosphere and protects the environment from contamination. 1. Grain filter, including a housing with nozzles for supplying dust and removal of purified gases and dust, filter cassettes with a loose granular layer, a device for regenerating the granular layer, made in the form of a pipe with an opening (made ugly, in order to improve of the granular layer regeneration process by uniformly distributing the pulsed flow through the filter cassettes, the holes are made in the form of annular Venturi tubes with Necks decreasing in the direction of the blow gas. 2. The filter according to claim 1, characterized by leu., That the annular holes are located under each filter cassette. Sources of information taken into consideration in the examination 1. US Patent No. 3798882, dated March 26, 74, cl. 55-302.