RU2474463C1 - Combined bed filter - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to gas dry cleaning of dust and may be used in construction, metallurgical and other industries as well as in cleaning ventilation emissions. Combined bed filter consists of cylindrical casing with blowoff tubes for regeneration and cleaned gas discharge branch pipes. Dusty gas chambers with unions for dust removal and dust-gas flow feed accommodates replaceable filtration cartridge. Said cartridge consists of three cells separated by metal gauze and located sequentially along dust-gas flow.

EFFECT: higher efficiency and reliability, power savings.

1 dwg

Description

The invention relates to equipment designed for dry cleaning of gases from dust, and can be used in the construction, refractory, metallurgical and other industries, as well as in environmental processes for cleaning ventilation emissions.

The closest in technical essence and the achieved effect is a three-layer granular filter with vertical filtering sections [P. Baltrenes, A. Spruogis, Yu. Krasovitsky. Air cleaning granular filters. - Vilnius: Technique, 1998], which are located in the same plane and are cylinders with perforated walls filled with granular filter material of various fractions. Dusty air passing through the first section filled with a coarse-grained aggregate of 24-26 mm is cleaned of fine dust particles, then, passing through the perforated walls, the air enters the second section, filled with an average grain filler of the 18-20 mm fraction, and then into the third a filtering section filled with a fine-grained aggregate of a fraction of 10 mm, where it is cleaned of small dust particles. The regeneration of the filter aggregate is carried out using a vibration device.

The disadvantage of this filter design is the lack of dust collection efficiency due to the use of sufficiently large aggregates and regeneration by means of a vibration device. Vibro-shaking is practically ineffective without backflushing layers with a significant amount of air. Inadequate regeneration reduces the efficiency of dust collection.

The technical task of the invention is the development of a bulk filter, which improves the efficiency and quality of cleaning dust and gas streams from dust due to more complete removal of particulate matter and purification of toxic gases from the stream, improves filter performance by performing reverse purge regeneration, reduces filter dimensions, and reduces the dimensions used production area.

The technical problem of the invention is achieved in that in a bulk combined filter comprising a cylindrical housing with purge tubes for regeneration and fittings for the outlet of the purified gas, a dusty gas chamber with fittings for removing dust and introducing a dust and gas stream, inside of which there is a replaceable filter cartridge, consisting of three sequentially located along the dust and gas flow of cells filled with granular aggregate of various fractions separated by a metal mesh, the new is that the first cell is filled with chamotte chips of a fraction of 3-6 mm, the second is chamotte chips of a fraction of 1-3 mm, the third is a porous adsorbent-coke, and the third cell with an adsorbent has a perforated side wall coated with a metal mesh and a layer of fibrous material, inside the cell purge channels passing through all three sections, in which metal tubes are installed, equipped on one side with spring valves that open the purge channel during regeneration and ensure the tightness of the purge channel during filtration, on the other hand, with fittings for supplying air for regeneration.

The technical result of the invention is to increase the efficiency and quality of gas cleaning from dust and cleaning from toxic emissions, providing deep regeneration of granular layers, ensuring a long filter life due to deep regeneration, using the main production product as a filtering filler, compactness of the apparatus, ease of operation and manufacture.

The drawing shows a diagram of a bulk combined filter and a cross-section of the filter from the input side of the dust and gas stream and the chamber of dusty gas (section AA).

The bulk combined filter consists of a cylindrical housing 1, an inlet fitting for entering a dusty stream 9, a fitting for removing dust 11, a fitting for removing purified gas 10, fixing bolts 16, a sealing rubber 15, a cartridge 2, consisting of three cells arranged in series along the gas with a granular aggregate of fireclay chips and adsorbent 12, perforated walls of the cell 3, fibrous material 4, dividing walls of metal mesh 5, distribution inlet grille 6, dusty air chamber 8, stroke in the filter element 7, the regenerating tubes 13, the ends of which are mounted spring-loaded valves 14, providing purge channel opening during regeneration and nozzles 17 for supplying air for regeneration.

Bulk combined filter works as follows.

The dust and gas stream through the inlet 9 enters the chamber of dusty air 8 and passes through a replaceable filter cartridge 2, consisting of three cells sequentially located along the gas and separated by a metal mesh 5 cells with granular aggregate 12 with various chamotte fractions and adsorbent-coke, and leaves through the perforated side walls of the cell with adsorbent 3, passing through a layer of fibrous material 4. Thus, a highly dusty dust and gas stream is first freed from the coarse fraction dust in the first cell, then from finer - in the second and is cleaned of toxic gases in the third. The purified air leaves through the nozzle 10.

Regeneration is provided by the backflushing method through the purge tubes 13 installed inside the cassettes, the spring valves 14 are installed at the ends of them. The spring valves open under pressure during regeneration, providing more intensive regeneration of the dusty layer itself and hermetically close during filtering. The presence of purge devices in the filter allows more efficient and complete regeneration, since regeneration is carried out in the depths of the layers. For regeneration take compressed air coming through the nozzle 10. The supply of compressed air was carried out through the receiver.

Using the proposed filter allows you to:

- carry out a combined dust cleaning of various fractions and toxic gases;

- increase the efficiency of gas purification by removing solid particles of various fractions from the dust and gas stream;

- work with dusty streams with a high concentration of solid phase;

- increase the reliability of the work;

- use dusty fireclay chips - a granular filter in production repeatedly;

- reduce energy costs in grinding raw materials.

Claims (1)

A bulk filter, including a cylindrical housing with purge tubes for regeneration and fittings for the outlet of the purified gas, a dusty gas chamber with fittings for removing dust and introducing a dust and gas stream, inside of which a replaceable filter cartridge is installed, consisting of three cells located in series along the dust and gas stream, filled with a granular filler of various fractions separated by a metal mesh, characterized in that the first cell is filled with chamotte fractions 3-6 mm, the second with chamotte chips of a fraction of 1-3 mm, the third with a porous adsorbent-coke, and the third cell with an adsorbent has a perforated side wall covered with a metal mesh and a layer of fibrous material, inside the cell there are purge channels passing through all three sections, in which are equipped with metal tubes, equipped on one side with spring valves opening the purge channel during regeneration and ensuring the tightness of the purge channel during filtration, on the other hand, with fittings To supply air for regeneration.

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