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CN-122006358-A - Anti-blocking gas filtering device and filtering method

CN122006358ACN 122006358 ACN122006358 ACN 122006358ACN-122006358-A

Abstract

The invention discloses an anti-blocking gas filtering device and a filtering method, and relates to the technical field of gas filtering. The anti-blocking gas filtering device comprises a shell, a gas spraying pipe and filtering components, wherein the gas spraying pipe is arranged in the middle of the shell, the plurality of filtering components are radially arranged on the periphery of the gas spraying pipe, and gas is filtered step by step along the filtering components with different filtering hole diameters. The invention is provided with the filter components, the air ejector, the rotating shaft and the deflection mechanism, wherein the filter components are radially arranged in the shell, gas is filtered step by step along the filter components with different filter hole diameters, the deflection mechanism is matched with the rotating shaft to drive the filter components to deflect, so that the filter components are circumferentially distributed outside the air ejector to form a sealed cavity, pulse gas is ejected to the sealed cavity through the air ejector, and the deformation of the filter components is impacted by reverse airflow to generate intense vibration, so that dust filter cakes on the surface of the filter components can be stripped.

Inventors

  • LI SHOUSHAN
  • LI YAN
  • XU WEIJIE
  • WANG XIAOJUN
  • ZHAO YONGSHENG

Assignees

  • 山东安益矿用设备股份有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. An anti-clogging gas filtering device, comprising a housing (10), characterized in that it further comprises: the air ejector tube (2), the said air ejector tube (2) locates in the middle part of body (10); the filter assemblies (3) are radially arranged on the periphery of the air ejector tube (2), and gas is filtered step by step along the filter assemblies (3) with different filter hole diameters; The rotating shafts (33) are arranged at the two axial ends of the filter assembly (3), and the rotating shafts (33) rotate to drive the filter assembly (3) to deflect 90 degrees, so that the filter assembly (3) is circumferentially distributed outside the air ejector tube (2) and a sealing chamber is formed; The deflection mechanism (4) is arranged at the upper part of the filtering assembly (3), and the deflection mechanism (4) can drive the rotating shaft (33) to rotate; In the ash removal state, pulse gas is sprayed to the sealing chamber through the air spraying pipe (2), so that a dust filter cake on the surface of the filter assembly (3) can be peeled off, and the air permeability of the filter assembly (3) is recovered.
  2. 2. The anti-clogging gas filtering device of claim 1, further comprising: The baffle plate (5) is arranged on the inner wall of the shell (10) and corresponds to the position of the filtering component (3), and a fixed shaft (51) is fixed at the upper end of the baffle plate (5); Carousel (6), carousel (6) are located filtering component (3) top, offer on carousel (6) with fixed axle (51) complex first logical groove (61), a plurality of first logical groove (61) are different on the radial length of carousel (6), under the deashing state, make fixed axle (51) slide in first logical groove (61) through rotatory carousel (6), can control baffle (5) and be close to filtering component (3), and correspond the distance between baffle (5) and the filtering component (3) and reduce along with the filtration pore diameter increase of filtering component (3).
  3. 3. The anti-blocking gas filtering device according to claim 2, wherein the rotary disc (6) is further provided with a second through groove (65), the upper end of the rotating shaft (33) positioned at the upper part of the filtering component (3) penetrates through the second through groove (65), the filtering component (3) is enabled to slide along the second through groove (65) by rotating the rotary disc (6), the filtering component (3) can be controlled to be close to the gas spraying pipe (2) along the radial direction, and the filtering components (3) with different numbers can form a sealed cavity after being deflected by 90 degrees under the action of the deflection mechanism (4).
  4. 4. The anti-clogging gas filtering device according to claim 3, wherein a sliding rail (11) is radially arranged at the lower end of the inner part of the shell (10), two ends of the sliding rail (11) are respectively fixed on the shell (10) and the gas spraying pipe (2), and a sliding groove (52) matched with the sliding rail (11) is formed in the baffle (5), so that the baffle (5) can slide on the sliding rail (11); the sliding rail (11) is provided with a second sliding block (332) matched with the sliding rail, and the second sliding block (332) is rotationally connected with a rotating shaft (33) positioned at the lower part of the filtering component (3).
  5. 5. An anti-clogging gas filtering device according to claim 1, wherein said deflection mechanism (4) comprises: The deflection gear (41) is sleeved outside the rotating shaft (33), a toothed ring (42) is arranged outside the deflection gear (41), and the toothed ring (42) can rotate to drive the filter assembly (3) to deflect by 90 degrees; And after one rotating shaft (33) extends to the outside of the shell (10), the first gear (44) is sleeved outside the shell, a rack (45) is arranged outside the first gear (44), a first air cylinder (43) is fixed on the upper surface of the shell (10), and a piston rod end of the first air cylinder (43) is fixedly connected with the rack (45).
  6. 6. A gas filtering device according to claim 2 or 3, wherein an arc toothed plate (62) is fixed on the upper surface of the turntable (6), a second gear (63) is arranged outside the arc toothed plate (62), and a motor (64) capable of driving the central shaft of the second gear (63) to rotate is arranged above the second gear (63).
  7. 7. The anti-clogging gas filtering device according to claim 1, wherein the filtering assembly (3) further comprises a mounting frame (31), a filtering material (32) is fixed on the mounting frame (31), sealing gaskets (34) are fixedly arranged on two sides of the mounting frame (31), and the rotating shafts (33) are arranged at two ends of the mounting frame (31).
  8. 8. The anti-clogging gas filtering device of claim 1, further comprising: The support frame (1) is positioned at the lower part of the shell (10) and is used for supporting the shell (10); an intake pipe (101) and an exhaust pipe (102), the intake pipe (101) and the exhaust pipe (102) being respectively in communication with the interior of the housing (10).
  9. 9. The anti-clogging gas filtering device of claim 8, further comprising: The valve plate (7) is arranged at the lower end of the shell (10) and is used for sealing the shell (10); The connecting frame (82), connecting frame (82) one end is fixed on valve plate (7), is fixed with mounting bracket (81) on support frame (1), and connecting frame (82) rotate and install on mounting bracket (81), and rotate on support frame (1) and install second cylinder (83), second cylinder (83) piston rod end is articulated with connecting frame (82).
  10. 10. An anti-clogging gas filtering method, suitable for an anti-clogging gas filtering device according to any one of claims 1 to 9, comprising the steps of: In the filtering stage, the gas sequentially passes through a plurality of filtering components (3) with the diameters of the filtering holes arranged from large to small, and the filtering components (3) are used for carrying out graded filtration on dust in the gas; In the ash removal stage, the deflection mechanism (4) drives the filter assembly (3) to deflect 90 degrees, so that the filter assembly (3) is circumferentially distributed outside the air jet pipe (2) and forms a sealing chamber, pulse gas is jetted to the sealing chamber through the air jet pipe (2), dust filter cakes on the surface of the filter assembly (3) can be peeled off, and the air permeability of the filter assembly (3) is recovered.

Description

Anti-blocking gas filtering device and filtering method Technical Field The invention relates to the technical field of gas filtration, in particular to an anti-blocking gas filtration device and a filtration method. Background In the coal mine industry, a large amount of gas exists underground in the coal mine and escapes from a coal seam or surrounding rock, so that the gas has the characteristics of no color, no smell and inflammability and explosiveness, the gas extracted underground is filtered, dedusted and purified, the explosion risk of the gas is reduced, and meanwhile, the high-concentration gas is recycled for power generation or civil gas. The existing gas separation and purification mainly adopts a pressure swing adsorption technology, and gas separation is realized by utilizing the difference of the equilibrium adsorption quantity or dynamic adsorption speed of the adsorbent on different gas components, and the pressure swing adsorption technology has the remarkable advantages of simple process, compact equipment, low running cost, high reliability, strong adaptability and the like, so that the pressure swing adsorption technology is more applied to the concentration and purification of coal mine gas. However, a large amount of coal dust and rock dust are entrained in the coal mine gas, and the particle size span is large, and fine dust of several micrometers to coarse particles of hundreds of micrometers can block the pores of the adsorbent, so that the gas is required to be subjected to graded filtration before entering the adsorption tower, and the dust is prevented from entering the adsorption tower. In the prior art, the dust of gas is classified and filtered through the filter plates with different apertures arranged side by side, and the dust carried by coal mine gas is strong in hydrophilicity, easy to combine with water in the gas to form viscous mud balls, extremely strong in adhesion force and difficult in ash removal, and if a mechanical brush type cleaning mode is adopted, the effective filtering area of a filter screen can be occupied on one hand, dust adhesion on a brush can be caused on the other hand, and the service life is short. The common pulse gas dust removal is to instantaneously reversely purge the surface of the filter plate through high-pressure pulse gas flow, and the reverse pulse gas flow can strip dust filter cakes, but the dust stripped on the filter plate can adhere to the non-dust surface of the adjacent filter plate, so that the dust removal effect is affected. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an anti-blocking gas filtering device and a filtering method, which solve the problem of difficult ash removal of a plurality of filter plates. In order to achieve the purpose, the invention is realized by the following technical scheme that the anti-blocking gas filtering device comprises a shell and further comprises: the air ejector tube is arranged in the middle of the shell; The filtering components are radially arranged on the periphery of the air ejector, and the gas is filtered step by step along the filtering components with different filter hole diameters; the rotating shafts are arranged at two axial ends of the filter assembly, and the rotating shafts rotate to drive the filter assembly to deflect 90 degrees, so that the filter assembly is circumferentially distributed outside the air jet pipe and a sealing chamber is formed; the deflection mechanism is arranged at the upper part of the filtering component and can drive the rotating shaft to rotate; In the ash removal state, pulse gas is sprayed to the sealing chamber through the air spraying pipe, so that a dust filter cake on the surface of the filter assembly can be peeled off, and the air permeability of the filter assembly is recovered. Further, the method further comprises the following steps: the baffle plate is arranged on the inner wall of the shell, corresponds to the position of the filtering component, and is fixedly provided with a fixed shaft at the upper end; The rotary table is located above the filter assembly, the rotary table is provided with first through grooves matched with the fixed shafts, the radial lengths of the first through grooves on the rotary table are different, the fixed shafts slide in the first through grooves through rotating the rotary table in a dust removing state, the baffle can be controlled to be close to the filter assembly, and the distance between the corresponding baffle and the filter assembly is reduced along with the increase of the diameter of the filter hole of the filter assembly. Further, the rotary table is further provided with a second through groove, the upper end of the rotary shaft positioned on the upper portion of the filter assembly penetrates through the second through groove, the filter assembly slides along the second through groove through the rotary table, the filter assembly can be contr