SU1560272A1 - Granular filter - Google Patents

Abstract

The invention relates to devices used for cleaning gases from dust, and can be applied in the chemical, food and petrochemical industries. The purpose of the invention is to increase productivity, reduce the consumption of regenerated gas. The filter includes a housing 1 of rectangular section, divided by inclined partitions 2 into several autonomous sections 3. Each section 3 contains one frame-shaped cartridge 4 with granular material 5. Each section 3 is equipped with four diaphragm valves 10 with a set of relays 11, 12 and 13 one of which (12) is normally open, and the other (11) is normally closed, with valves 10 and a set of relays pneumatically controlled. 1 il.

Description

The invention relates to devices used for cleaning gases from dust, and can be applied in the chemical, food and petrochemical industries.

The purpose of the invention is to increase productivity, reduce the consumption of regenerating gas.

The drawing shows schematically the filter, a longitudinal section.

The filter includes a housing 1 of rectangular cross-section, divided by inclined partitions 2 into several autonomous sections 3. Each section contains one cassette 4, made in the form of a frame welded, for example, from a corner, in the frame there are grids attached to the bottom, holding the granular material 5. To the case 1, the distribution boxes 6 and 7 are tightly fastened, having gas inlet and outlet nozzles 8 and partitions 9 for hermetically separating the sections from each other. Each nozzle 8 has two diaphragm valves 10 (valves for one section are shown in the drawing) to shut off the streams of dusty and regenerating gases. At the same time, the opening and closing of valves 10 are carried out in pairs by a pneumatic system (a pneumatic system is shown for only one section, the total number of pneumatic systems is equal to the number of sections) consisting of pneumatic controlled relay 11 and 12c and manual control relay 13. Each relay 11 or 12 contains membranes with a rigid center 14, valves 15, seats 16 Valves 15 and rigid centers 14 are connected by posts 17, forming membrane blocks. Relay 13 contains a knob 18 for switching, and relay 12 a nozzle 19. Thus, for relay 11, the normal position is closed, for relay 12 it is open.

The filter works as follows.

Dust-laden gas enters sections 3 operating in filtration mode through upper valves 10, pipes 18, junction box 6 into the upper space of sections 2, where the passage through cassette 4 is cleaned of solid particles in granular material 5. The purified gas enters the distribution the box 7 and through the pipes 8 and the upper valve 10 are emitted into the atmosphere. At the same time, the regenerating gas through the lower valves 10, nozzles 8, the distribution box 7 enters section 3, operating in the regeneration mode. Regenerating gas, passage in section 3

cutting the granular material 5, cleans it from the captured particles and enters the duct 6 and through the pipes 8 and the lower valve 10 enters the regeneration, for example, into a vortex dust collector.

The supply of dusty gas to a separate section and its operation in the filtering mode is controlled by a pneumatic system ensuring the opening of the upper valves 10 and the closing of the lower ones. Control air

0 passes through the nozzle 19 and the relay 12. The membrane block of the relay 12, being in the upper position, passes air supply to the lower valves 10, closing the passage to the regenerating gas in section 3. At the same time, the upper valves 10 are open, as in relay 11 the valve 15 closes the seat 16 and the feed air do not enter the upper valves.

Other filter sections 3 are similarly controlled.

o In the process of filtering the dusty gas, the resistance of the granular material 5 increases and, upon reaching a certain value, section 3 is switched to the regeneration mode.

By turning the knob 18 in the relay 13, the diaphragm unit shifts down, opening air to the control chambers of relay 11 and 12. At the same time, the membrane unit of the relay 12, shifting down, closes the nozzle 19 and turns off the supply air to the valves 10 located below, connecting membranes with atmosphere and opening access to regenerating gas to section 3. Diaphragm block of relay 11, shifting down, allows access to supply air to upper valves 10, closing them, turning off the supply of dust

5 gas to section 3.

The filter can be controlled automatically with the help of a pneumatic controller, performed filter operation at a specified time cycle or with the help of adaptive

0 of the system, including the section in the regeneration mode after reaching a predetermined resistance of the granular layer.

The highest efficiency of the filter is achieved when one section 3 is turned on in the regeneration mode and

5 filtering all the others, the number of sections 3 for their size is selected according to the productivity and dust content of the gas to be purified.

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Claims (1)

Claims of Invention Performance, Reducing Ras-Grain Filter for Separating Dust, Regenerating Gas Run, Each Section containing a body of sections, filter-made autonomous and equipped with four These cassettes with granular material, diaphragm valves with a set of relays, one on top of each other and one-five but normally open and the sloped partitions normally closed, with the valve cabins for dusty and regenerating relays are connected by pneumatic upazaz, characterized in that, with the purpose of rotation.