CN114470982B - Flue gas filtering back-blowing type dedusting filter bag for coal-fired boiler - Google Patents

Flue gas filtering back-blowing type dedusting filter bag for coal-fired boiler Download PDF

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Publication number
CN114470982B
CN114470982B CN202210194824.1A CN202210194824A CN114470982B CN 114470982 B CN114470982 B CN 114470982B CN 202210194824 A CN202210194824 A CN 202210194824A CN 114470982 B CN114470982 B CN 114470982B
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China
Prior art keywords
filter bag
rod
filter
assembly
pipe
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CN202210194824.1A
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CN114470982A (en
Inventor
卢敏勇
徐万中
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Anhui Tianshun Environmental Protection Filter Material Co ltd
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Anhui Tianshun Environmental Protection Filter Material Co ltd
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Publication of CN114470982A publication Critical patent/CN114470982A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023Pockets filters, i.e. multiple bag filters mounted on a common frame
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04Cleaning filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure

Abstract

The invention discloses a smoke filtering back-blowing type dedusting filter bag for a coal-fired boiler, which belongs to the technical field of smoke filtering and comprises a filter box body, wherein a support frame is arranged below the filter box body, an air inlet connected with an exhaust pipe of the coal-fired boiler is formed in the side end of the filter box body, and a filter assembly is arranged in the filter box body. According to the flue gas filtering back-blowing type dedusting filter bag for the coal-fired boiler, disclosed by the invention, the flue gas is subjected to double filtration by the outer filter bag and the inner filter bag, so that the filtering efficiency is effectively improved, the quality of filtered gas is ensured, filtered impurities are conveyed into a dust discharging port by a dust discharging funnel to be discharged, the impurities are effectively cleaned, the outer filter bag and the inner filter bag are dried by hot gas, the drying efficiency is improved, the residual dust in the outer filter bag and the inner filter bag is blown out, the cleaning effect of the outer filter bag and the inner filter bag is improved, the filtering blockage is prevented, the ash discharging efficiency is improved, the cleaning force is ensured, and the stirring and beating device and the outer beating piece can be simultaneously driven to rotate together to clean the dedusting filter bag.

Description

Flue gas filtering back-blowing type dedusting filter bag for coal-fired boiler
Technical Field
The invention relates to the technical field of flue gas filtration, in particular to a flue gas filtration back-blowing type dedusting filter bag for a coal-fired boiler.
Background
The coal-fired boiler is a boiler using coal as fuel, and is a heat energy power device for heating heat medium water or other organic heat carriers to a certain temperature by burning the coal in a hearth, when the coal-fired boiler burns, smoke naturally rises, and is discharged from a smoke outlet of the coal-fired boiler, and the burning smoke contains a large amount of dust and impurities, so that the air quality is affected by direct discharge, the air pollution is caused, and the smoke is required to be filtered by a dust removing filter bag and then discharged.
1. When the existing dust removing filter bag filters flue gas, a large amount of dust remains in the dust removing filter bag, and the filter cloth is easily blocked by long-time dust accumulation, so that the filtering efficiency is poor;
2. secondly, the existing filter cloth is cleaned, most of the filter cloth is blown from top to bottom to blow the dust removing filter bag, so that dust in the filter bag falls off, but unidirectional blowing dust removing cannot be achieved, dust removing efficiency cannot be achieved well, and the process is slow and efficiency is poor.
Disclosure of Invention
The invention aims to provide a smoke filtering back-blowing type dedusting filter bag for a coal-fired boiler, wherein an outer filter bag and an inner filter bag are used for double filtering of smoke, filtering efficiency is effectively improved, quality of filtered gas is guaranteed, filtered impurities are conveyed into a dust discharging port through a dust discharging funnel to be discharged, the impurities are effectively cleaned, the outer filter bag and the inner filter bag are dried through hot gas, residual water vapor in the filtered gas is effectively prevented from blocking the outer filter bag and the inner filter bag, drying efficiency is improved, residual dust in the outer filter bag and the inner filter bag is blown out, cleaning effect of the outer filter bag and the inner filter bag is improved, filtering blocking is prevented, ash discharging efficiency is improved, cleaning force is guaranteed, and a stirring and beating device and an outer beating piece can be simultaneously driven to rotate together to clean the dedusting filter bag, so that the problems in the background technology are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a flue gas filters blowback formula dust removal filter bag for coal-fired boiler, includes the filter box, the below of filter box is provided with the support frame, and the air inlet of being connected with coal-fired boiler blast pipe has been seted up to the side of filter box, the inside of filter box is provided with filter element, and the top of filter box is provided with the stoving of intercommunication in with filter element and blows the subassembly, and filter element's below is provided with blowback subassembly, is provided with on the filter element of blowback subassembly top and twists the dust removal subassembly.
Further, filter component includes outer filter bag, interior filter bag, dust exhaust funnel, dust exhaust mouth, inscription pipeline and external pipeline, the inside cladding of outer filter bag is provided with interior filter bag, outer filter bag and interior filter bag upper end are all fixed on the filter box upper end inner wall, the below of outer filter bag is connected with external pipeline upper end, the below of interior filter bag is connected with inscription pipeline upper end, inscription pipeline cover covers at external pipeline, inscription pipeline and external pipeline below set up in the dust exhaust mouth, the below at the filter box is seted up to dust exhaust funnel, dust exhaust mouth is connected with to dust exhaust funnel's bottom, the gas vent has been seted up on the filter box of outer filter bag and the inside top of interior filter bag.
Further, a gap between the outer filter bag and the inner filter bag is communicated with a gap between the inner connecting pipeline and the outer connecting pipeline, and the inner connecting pipeline and the outer connecting pipeline are connected by an inner connecting rod.
Further, the stoving upwind subassembly includes heating cabinet, heater rod, fan, heat transfer return bend and gas-supply pipe, and the inside of heating cabinet transversely is provided with the heater rod, and the outside winding of heater rod is provided with the heat transfer return bend, and heat transfer return bend middle extreme is connected with the fan wind-dispelling mouth through the pipeline, and heat transfer return bend both ends all communicate with each other through the gap between gas-supply pipe and outer filter bag and the interior filter bag.
Further, the back flushing assembly comprises a back flushing air pump, a back flushing pipe, a pressurizer, a sealing valve and an electric control valve, wherein the back flushing air pump is arranged at the side end of the filtering box body, the air conveying end of the back flushing air pump is connected with the back flushing pipe, the pressurizer is arranged on the back flushing pipe, the back flushing pipe is communicated with a gap between the internal pipeline and the external pipeline, the sealing valve is arranged between the back flushing pipe and the connecting end of the external pipeline, and the electric control valve is arranged between the internal pipeline below the back flushing pipe and the external pipeline.
Further, twist and move dust removal subassembly and include interior connecting bearing, outer connecting bearing, mounting panel and drive assembly, interior connecting bearing installs including the connecting tube middle extreme, and outer connecting bearing installs in external pipeline middle extreme, and drive assembly cup joints in external pipeline outside, and drive assembly one end is fixed on the mounting panel, and the mounting panel is fixed on the inner wall of filtration box.
Further, the driving assembly comprises a driving motor, a rotating rod, a driving gear, a sleeve joint ring and an outer tooth groove, wherein the output end of the driving motor is connected with the rotating rod, the driving gear is sleeved on the rotating rod, the sleeve joint ring is sleeved on an external pipeline, the outer tooth groove is formed in the outer side of the sleeve joint ring, and the driving gear is meshed with the outer tooth groove.
Further, the inside of filter unit is provided with the stirring and beats the device, and the stirring is patted the device and is including installation pole, left rapping bar, right rapping bar and connecting rod, and installation pole bottom both ends are connected with inscribed pipeline inner wall through the connecting rod respectively, and left rapping bar and right rapping bar are installed respectively at the both ends of installation pole, and left rapping bar and right rapping bar all set up the multiunit, and multiunit left rapping bar and right rapping bar's length from the bottom up increases gradually, multiunit left rapping bar and right rapping bar one end and interior filter bag laminating.
Further, the outer beating piece is arranged on the inner wall of the filtering box body at the outer side of the filtering assembly and comprises an inner collar, an inner stirring rod, an inner connecting ring, an inner tooth groove and an inner ring rod, the inner collar is arranged on the inner wall of the filtering box body, the inner ring rod is arranged on the inner wall of the inner collar, a plurality of groups of inner stirring rods are arranged on the inner ring rod, the bottom end of the inner ring rod is connected with the inner connecting ring, an inner tooth groove is arranged on the inner wall of the inner connecting ring, and the inner tooth groove is connected with the screwing dust removing assembly.
Compared with the prior art, the invention has the beneficial effects that:
1. the flue gas filtering back-blowing type dedusting filter bag for the coal-fired boiler provided by the invention is characterized in that the dust discharge funnel is arranged below the filter box body, the bottom end of the dust discharge funnel is connected with the dust discharge port, the filter box body above the inner part of the outer filter bag and the inner filter bag is provided with the exhaust port, the gap between the outer filter bag and the inner filter bag is communicated with the gap between the inner connecting pipeline and the outer connecting pipeline, the inner connecting pipeline and the outer connecting pipeline are connected by the inner connecting rod, the outer filter bag and the inner filter bag are used for double filtering of flue gas, the filtering efficiency is effectively improved, the quality of filtered gas is ensured, and filtered impurities are conveyed into the dust discharge port by the dust discharge funnel to be discharged, so that the impurities are effectively cleaned.
2. The middle end of the heat exchange bent pipe is connected with the air-dispersing port of the fan through the pipeline, both ends of the heat exchange bent pipe are communicated with the gaps between the outer filter bag and the inner filter bag through the air conveying pipe, the heating rod heats the gas conveyed in the heat exchange bent pipe, the heated gas is conveyed into the gaps between the outer filter bag and the inner filter bag through the air conveying pipe, the outer filter bag and the inner filter bag are dried through hot gas, and the blocking of the outer filter bag and the inner filter bag by residual water vapor in filtered gas is effectively prevented, so that the drying efficiency is improved.
3. The flue gas filtering back-blowing type dedusting filter bag for the coal-fired boiler is characterized in that an electric control valve is arranged between an inner connecting pipeline and an outer connecting pipeline below a back flushing pipe, a pressurizer pressurizes gas in the back flushing pipe for injecting gas into the back flushing pump, back flushing is carried out between an outer filter bag and the inner filter bag through a gap between the inner connecting pipeline and the outer connecting pipeline, the back flushing is carried out on the inner filter bag and the inner filter bag, the inner filter bag is matched with a drying and upward blowing assembly, dust remained in the outer filter bag and the inner filter bag is blown out, the cleaning effect of the outer filter bag and the inner filter bag is improved, and filtering blockage is prevented.
4. The flue gas filtering back-blowing type dedusting filter bag for the coal-fired boiler provided by the invention has the advantages that the outer tooth socket is formed on the outer side of the sleeve joint ring, the driving gear is meshed with the outer tooth socket, the driving motor drives the rotating rod to rotate, the rotating rod drives the driving gear to rotate, the sleeve joint ring and the external connecting pipe are driven to rotate, the external connecting pipe drives the internal connecting pipe to rotate under the action of the internal connecting pipe, so that the external filter bag and the internal filter bag are twisted back and forth, the ash discharging efficiency is improved, the cleaning force is ensured, and the stirring and beating device and the external beating piece can be simultaneously driven to rotate together to clean the dedusting filter bag.
5. According to the smoke filtering back-blowing type dedusting filter bag for the coal-fired boiler, the left beating rods and the right beating rods are respectively provided with a plurality of groups, the lengths of the left beating rods and the right beating rods of the plurality of groups are sequentially increased from bottom to top, one ends of the left beating rods and the right beating rods of the plurality of groups are attached to the inner filter bag, and the mounting rods drive the left beating rods and the right beating rods to beat the inner wall of the inner filter bag under the condition that the inner connecting pipe rotates, so that dust removal efficiency is improved, and dedusting efficiency is improved.
6. The flue gas filtering back-blowing type dedusting filter bag for the coal-fired boiler is provided with the inner tooth socket on the inner wall of the inner connecting ring, the inner tooth socket is connected with the screwing dedusting assembly, the driving gear is meshed with the inner tooth socket, and the driving gear drives the inner connecting ring to rotate, so that the inner stirring rod and the inner ring rod are driven to rotate, the surfaces of the outer filter bag are subjected to flapping cleaning, the cleaning efficiency and the cleaning speed are improved, the dedusting filter bag is cleaned to the greatest extent, and the dedusting efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the overall structure of the present invention;
FIG. 3 is a cross-sectional view showing the structure of the drying and upblowing assembly of the present invention;
FIG. 4 is a schematic view of a blowback assembly according to the present invention;
FIG. 5 is an enlarged view of the invention at A of FIG. 2;
FIG. 6 is a top view of the drive assembly structure of the present invention;
FIG. 7 is a schematic view of the structure of the stirring and beating device of the present invention;
fig. 8 is a cross-sectional view of the outer flapper of the present invention.
In the figure: 1. a filter box; 11. a support frame; 12. an air inlet; 13. an exhaust port; 2. a filter assembly; 21. an outer filter bag; 22. an inner filter bag; 23. a dust discharge funnel; 24. a dust discharge port; 25. inscribing a pipeline; 251. an inner connecting rod; 26. externally connected pipelines; 3. drying the upper blowing component; 31. a heating box; 32. a heating rod; 33. a blower; 34. a heat exchange elbow; 35. a gas pipe; 4. a blowback assembly; 41. a back-blowing air pump; 42. a backwash tube; 43. a pressurizer; 44. a closing valve; 45. an electric control valve; 5. screwing the dust removing component; 51. connecting a bearing internally; 52. an outer connecting bearing; 53. a mounting plate; 54. a drive assembly; 541. a driving motor; 542. a rotating rod; 543. a drive gear; 544. a sleeve joint ring; 545. an outer spline; 6. a stirring and beating device; 61. a mounting rod; 62. a left beating rod; 63. a right flapping rod; 64. a connecting rod; 7. an outer flapper; 71. an inner collar; 72. an inner stirring rod; 73. an inner connecting ring; 74. an inner spline; 75. an inner ring rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flue gas filtering back-blowing type dust removing filter bag for a coal-fired boiler comprises a filter box body 1, wherein a supporting frame 11 is arranged below the filter box body 1, an air inlet 12 connected with an exhaust pipe of the coal-fired boiler is formed in the side end of the filter box body 1, a filter assembly 2 is arranged in the filter box body 1, a drying and top-blowing assembly 3 communicated with the filter assembly 2 is arranged above the filter box body 1, a back-blowing assembly 4 is arranged below the filter assembly 2, and a screwing and dedusting assembly 5 is arranged on the filter assembly 2 above the back-blowing assembly 4.
Referring to fig. 2, the filter assembly 2 includes an outer filter bag 21, an inner filter bag 22, a dust exhaust funnel 23, a dust exhaust port 24, an inner connecting pipe 25 and an outer connecting pipe 26, the inner coating of the outer filter bag 21 is provided with the inner filter bag 22, the upper ends of the outer filter bag 21 and the inner filter bag 22 are both fixed on the inner wall of the upper end of the filter box 1, the lower part of the outer filter bag 21 is connected with the upper end of the outer connecting pipe 26, the lower part of the inner filter bag 22 is connected with the upper end of the inner connecting pipe 25, the inner connecting pipe 25 is sleeved with the outer connecting pipe 26, the lower parts of the inner connecting pipe 25 and the outer connecting pipe 26 are arranged in the dust exhaust port 24, the dust exhaust funnel 23 is arranged below the filter box 1, the bottom end of the dust exhaust funnel 23 is connected with the dust exhaust port 24, the gap between the outer filter bag 21 and the inner filter bag 22 is communicated with the gap between the inner connecting pipe 25 and the outer connecting pipe 26, the inner connecting pipe 25 and the outer connecting pipe 26 are connected by an inner connecting rod 251, the outer filter bag 21 and the inner filter bag 22 filters flue gas, the filtering efficiency is effectively improved, the filtered gas quality is ensured, and the filtered dust is effectively cleaned by the dust exhaust funnel 23 to the dust exhaust port.
Referring to fig. 3, the drying and updraft assembly 3 includes a heating box 31, a heating rod 32, a fan 33, a heat exchange elbow 34 and a gas pipe 35, wherein the heating rod 32 is transversely arranged in the heating box 31, the heat exchange elbow 34 is wound on the outer side of the heating rod 32, the middle end of the heat exchange elbow 34 is connected with a wind-dispelling port of the fan 33 through a pipeline, two ends of the heat exchange elbow 34 are communicated with a gap between an outer filter bag 21 and an inner filter bag 22 through the gas pipe 35, gas conveyed in the heat exchange elbow 34 is heated after the heating rod 32 is heated, the heated gas is conveyed into the gap between the outer filter bag 21 and the inner filter bag 22 through the gas pipe 35, the outer filter bag 21 and the inner filter bag 22 are dried through hot gas, residual water vapor in the filtered gas is effectively prevented from blocking the outer filter bag 21 and the inner filter bag 22, and drying efficiency is improved.
The back-blowing assembly 4 comprises a back-blowing air pump 41, a back-flushing pipe 42, a pressurizer 43, a closing valve 44 and an electric control valve 45, wherein the back-blowing air pump 41 is arranged at the side end of the filter box body 1, the air conveying end of the back-blowing air pump 41 is connected with the back-flushing pipe 42, the pressurizer 43 is arranged on the back-flushing pipe 42, gaps between the back-flushing pipe 42 and the internal connecting pipe 25 and the external connecting pipe 26 are communicated, the closing valve 44 is arranged between the connecting end of the back-flushing pipe 42 and the external connecting pipe 26, the electric control valve 45 is arranged between the internal connecting pipe 25 and the external connecting pipe 26 below the back-flushing pipe 42, the pressurizer 43 pressurizes air in the back-flushing pipe 42 filled with air, back-flushing is carried out between the external filtering bag 21 and the internal filtering bag 22 through the gaps between the internal connecting pipe 25 and the external connecting pipe 26, the back-flushing assembly 3 is matched with the drying top-blowing assembly 3, dust remained in the external filtering bag 21 and the internal filtering bag 22 is blown out, the cleaning effect of the external filtering bag 21 and the internal filtering bag 22 is improved, and the filtering blockage is prevented.
Referring to fig. 5-6, the screwing-type dust removing assembly 5 includes an inner connecting bearing 51, an outer connecting bearing 52, a mounting plate 53 and a driving assembly 54, the inner connecting bearing 51 is mounted at the middle end of the inner connecting pipe 25, the outer connecting bearing 52 is mounted at the middle end of the outer connecting pipe 26, the driving assembly 54 is sleeved outside the outer connecting pipe 26, one end of the driving assembly 54 is fixed on the mounting plate 53, the mounting plate 53 is fixed on the inner wall of the filtering box 1, the driving assembly 54 includes a driving motor 541, a rotating rod 542, a driving gear 543, a sleeve ring 544 and an outer tooth groove 545, the output end of the driving motor 541 is connected with the rotating rod 542, the sleeve ring 544 is sleeved on the outer connecting pipe 26, the outer tooth groove 545 is formed at the outer side of the sleeve ring 544, the driving gear 543 is meshed with the outer tooth groove 545, the driving motor 541 drives the rotating rod 542, the rotating rod 542 drives the driving gear 543 to rotate so as to drive the sleeve ring 544 and the outer connecting pipe 26 to rotate, the inner connecting pipe 25 is driven to rotate under the action of the inner connecting rod 251 so as to twist the outer filter bag 21 and the inner filter bag 22 back and forth, dust removing efficiency is improved, the cleaning force is ensured, and the stirring device 6 and the outer filter bag 7 can be driven to rotate together.
Referring to fig. 7, the stirring and beating device 6 is disposed inside the filter assembly 2, the stirring and beating device 6 includes a mounting rod 61, a left beating rod 62, a right beating rod 63 and a connecting rod 64, two ends of the bottom end of the mounting rod 61 are respectively connected with the inner wall of the inner connecting pipe 25 through the connecting rod 64, the left beating rod 62 and the right beating rod 63 are respectively mounted at two ends of the mounting rod 61, the left beating rod 62 and the right beating rod 63 are respectively provided with a plurality of groups, the lengths of the left beating rod 62 and the right beating rod 63 of the plurality of groups are sequentially increased from bottom to top, one ends of the left beating rod 62 and the right beating rod 63 of the plurality of groups are attached to the inner filtering bag 22, and the mounting rod 61 drives the left beating rod 62 and the right beating rod 63 to beat the inner wall of the inner filtering bag 22 under the condition that the inner connecting pipe 25 rotates, so that dust removal efficiency is improved, and dust removal efficiency is improved.
Referring to fig. 8, an outer beating member 7 is disposed on the inner wall of the filtering box 1 outside the filtering assembly 2, the outer beating member 7 includes an inner collar 71, an inner stirring rod 72, an inner connecting ring 73, an inner tooth groove 74 and an inner ring rod 75, the inner collar 71 is mounted on the inner wall of the filtering box 1, the inner ring rod 75 is mounted on the inner wall of the inner collar 71, a plurality of groups of inner stirring rods 72 are mounted on the inner ring rod 75, the bottom end of the inner ring rod 75 is connected with an inner connecting ring 73, an inner tooth groove 74 is disposed on the inner wall of the inner connecting ring 73, the inner tooth groove 74 is connected with the screwing dedusting assembly 5, a driving gear 543 is meshed with the inner tooth groove 74, the driving gear 543 drives the inner connecting ring 73 to rotate, so as to drive the inner stirring rod 72 and the inner ring rod 75 to rotate, and clean the surface of the filter bag 21 in a beating manner, thereby improving cleaning efficiency and speed, and maximally cleaning the dedusting filter bag.
In summary, the flue gas filtering back-blowing type dust removing filter bag for the coal-fired boiler provided by the invention has the advantages that the dust removing funnel 23 is arranged below the filter box body 1, the bottom end of the dust removing funnel 23 is connected with the dust removing port 24, the filter box body 1 above the inside of the outer filter bag 21 and the inner filter bag 22 is provided with the exhaust port 13, the gap between the outer filter bag 21 and the inner filter bag 22 is communicated with the gap between the inner connecting pipeline 25 and the outer connecting pipeline 26, the inner connecting pipeline 25 and the outer connecting pipeline 26 are connected by the inner connecting rod 251, the outer filter bag 21 and the inner filter bag 22 are used for double filtering flue gas, the filtering efficiency is effectively improved, the quality of filtered gas is ensured, the filtered impurities are conveyed into the dust removing port 24 by the dust removing funnel 23 and are effectively cleaned, the middle end of the heat exchanging elbow 34 is connected with the air dispelling port of the fan 33 by the pipeline, the two ends of the heat exchanging elbow 34 are communicated with the gap between the outer filter bag 21 and the inner filter bag 22 by the air conveying pipe 35, the heating rod 32 heats the gas conveyed in the heat exchange bent pipe 34 after heating, the heated gas is conveyed into the gap between the outer filter bag 21 and the inner filter bag 22 by the gas conveying pipe 35, the outer filter bag 21 and the inner filter bag 22 are dried by hot gas, the blocking of the outer filter bag 21 and the inner filter bag 22 by residual water vapor in the filtered gas is effectively prevented, the drying efficiency is improved, an electric control valve 45 is arranged between an inner connecting pipe 25 and an outer connecting pipe 26 below a backflushing pipe 42, the pressurizer 43 pressurizes the gas in the backflushing pipe 42 for injecting the gas by the backflushing pump 41, the backflushing between the outer filter bag 21 and the inner filter bag 22 is carried out through the gap between the inner connecting pipe 25 and the outer connecting pipe 26, the air is matched with the drying upper blowing component 3, the dust remained in the outer filter bag 21 and the inner filter bag 22 is blown out, the cleaning effect of the outer filter bag 21 and the inner filter bag 22 is improved, the filter is prevented from being blocked, the outer tooth groove 545 is formed in the outer side of the sleeve ring 544, the driving gear 543 is meshed with the outer tooth groove 545, the driving motor 541 drives the rotating rod 542 to rotate, the rotating rod 542 drives the driving gear 543 to rotate, and accordingly the sleeve ring 544 and the external connecting pipe 26 are driven to rotate, the external connecting pipe 26 drives the internal connecting pipe 25 to rotate under the action of the internal connecting pipe 251, the outer filter bag 21 and the inner filter bag 22 are twisted back and forth, the ash discharging efficiency is improved, the cleaning force is guaranteed, the stirring and beating device 6 and the outer beating piece 7 can be driven to rotate together, the dedusting filter bag is cleaned, the left beating rod 62 and the right beating rod 63 are provided with a plurality of groups, the lengths of the left beating rod 62 and the right beating rod 63 of the plurality of groups are sequentially increased from bottom to top, one end of the left beating rod 62 and the right beating rod 63 are attached to the inner filter bag 22, the mounting rod 61 drives the left beating rod 62 and the right beating rod 63 to beat the inner wall of the inner filter bag 22 under the condition that the internal connecting pipe 25 rotates, the dedusting efficiency is improved, the inner tooth groove 74 is arranged on the inner wall of the inner beating ring 73, the inner tooth groove 74 is connected with the inner tooth groove 74, the inner tooth groove 74 is connected with the inner tooth groove 5, the inner tooth groove 74 is driven to rotate the inner tooth groove 74, the inner ring 21 is cleaned, the inner ring cleaning efficiency is improved, the inner filter cleaning efficiency is guaranteed, the inner filter cleaning efficiency is improved, the inner filter cleaning efficiency is the inner filter, and the inner filter cleaning is cleaning, the filter cleaning is cleaning, and the filter is cleaning, and the.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.

Claims (3)

1. The utility model provides a flue gas filtration blowback formula dust removal filter bag for coal fired boiler which characterized in that: the air inlet (12) connected with an exhaust pipe of the coal-fired boiler is formed in the side end of the filter box body (1), a filter assembly (2) is arranged in the filter box body (1), a drying and blowing assembly (3) communicated with the filter assembly (2) is arranged above the filter box body (1), a back blowing assembly (4) is arranged below the filter assembly (2), and a screwing and dedusting assembly (5) is arranged on the filter assembly (2) above the back blowing assembly (4);
the filter assembly (2) comprises an outer filter bag (21), an inner filter bag (22), a dust discharge funnel (23), a dust discharge port (24), an inner connecting pipeline (25) and an outer connecting pipeline (26), wherein the inner filter bag (22) is arranged on the inner coating of the outer filter bag (21), the upper ends of the outer filter bag (21) and the inner filter bag (22) are both fixed on the inner wall of the upper end of the filter box body (1), the lower part of the outer filter bag (21) is connected with the upper end of the outer connecting pipeline (26), the lower part of the inner filter bag (22) is connected with the upper end of the inner connecting pipeline (25), the inner connecting pipeline (25) is sleeved in the outer connecting pipeline (26), the inner connecting pipeline (25) and the lower part of the outer connecting pipeline (26) are arranged in the dust discharge port (24), the dust discharge funnel (23) is arranged below the filter box body (1), and the bottom end of the dust discharge funnel (23) is connected with the dust discharge port (24), and the exhaust port (13) is arranged on the filter box body (1) above the inner part of the outer filter bag (21).
The gap between the outer filter bag (21) and the inner filter bag (22) is communicated with the gap between the inner connecting pipeline (25) and the outer connecting pipeline (26), and the inner connecting pipeline (25) and the outer connecting pipeline (26) are connected by an inner connecting rod (251);
the screwing dust removal assembly (5) comprises an inner connecting bearing (51), an outer connecting bearing (52), a mounting plate (53) and a driving assembly (54), wherein the inner connecting bearing (51) is arranged at the middle end of an inner connecting pipeline (25), the outer connecting bearing (52) is arranged at the middle end of an outer connecting pipeline (26), the driving assembly (54) is sleeved outside the outer connecting pipeline (26), one end of the driving assembly (54) is fixed on the mounting plate (53), and the mounting plate (53) is fixed on the inner wall of the filtering box body (1);
the driving assembly (54) comprises a driving motor (541), a rotating rod (542), a driving gear (543), a sleeve joint ring (544) and an external tooth groove (545), wherein the rotating rod (542) is connected to the output end of the driving motor (541), the rotating rod (542) is sleeved with the driving gear (543), the sleeve joint ring (544) is sleeved on an external pipeline (26), the external tooth groove (545) is formed in the outer side of the sleeve joint ring (544), and the driving gear (543) is meshed with the external tooth groove (545);
the inside of the filter component (2) is provided with a stirring and beating device (6), the stirring and beating device (6) comprises a mounting rod (61), a left beating rod (62), a right beating rod (63) and a connecting rod (64), two ends of the bottom end of the mounting rod (61) are respectively connected with the inner wall of the inscribed pipeline (25) through the connecting rod (64), the left beating rod (62) and the right beating rod (63) are respectively arranged at two ends of the mounting rod (61), the left beating rod (62) and the right beating rod (63) are respectively provided with a plurality of groups, the lengths of the left beating rod (62) and the right beating rod (63) of the plurality of groups are sequentially increased from bottom to top, and one ends of the left beating rod (62) and the right beating rod (63) of the plurality of groups are attached to the inner filter bag (22);
the utility model discloses a filter assembly, including filter assembly (2), filter box (1), be provided with on the inner wall of filter box (1) in the filter assembly (2), outer piece (7) of beating includes interior collar (71), interior puddler (72), interior inner tooth groove (73), inner ring (74) and interior ring rod (75), interior collar (71) are installed on the inner wall of filter box (1), install interior ring rod (75) on interior collar (71) inner wall, install multiunit interior puddler (72) on interior ring rod (75), interior ring (75) bottom is connected with interior inner ring (73), be provided with interior tooth groove (74) on interior ring (73) inner wall, interior tooth groove (74) are connected with twisting dust removal assembly (5), drive gear (543) and interior tooth groove (74) meshing.
2. The flue gas filtering blowback dust removal filter bag for a coal-fired boiler according to claim 1, wherein: the drying and upward blowing assembly (3) comprises a heating box (31), a heating rod (32), a fan (33), a heat exchange bent pipe (34) and a gas transmission pipe (35), wherein the heating rod (32) is transversely arranged in the heating box (31), the heat exchange bent pipe (34) is wound on the outer side of the heating rod (32), the middle end of the heat exchange bent pipe (34) is connected with a wind dispelling port of the fan (33) through a pipeline, and two ends of the heat exchange bent pipe (34) are communicated with a gap between an outer filter bag (21) and an inner filter bag (22) through the gas transmission pipe (35).
3. The flue gas filtering blowback dust removal filter bag for a coal-fired boiler according to claim 1, wherein: the back-flushing assembly (4) comprises a back-flushing air pump (41), a back-flushing pipe (42), a pressurizer (43), a sealing valve (44) and an electric control valve (45), wherein the back-flushing air pump (41) is arranged at the side end of the filter box body (1), the air conveying end of the back-flushing air pump (41) is connected with the back-flushing pipe (42), the pressurizer (43) is arranged on the back-flushing pipe (42), the back-flushing pipe (42) is communicated with a gap between the internal connecting pipe (25) and the external connecting pipe (26), the sealing valve (44) is arranged between the back-flushing pipe (42) and the connecting end of the external connecting pipe (26), and the electric control valve (45) is arranged between the internal connecting pipe (25) below the back-flushing pipe (42) and the external connecting pipe (26).
CN202210194824.1A 2022-03-01 2022-03-01 Flue gas filtering back-blowing type dedusting filter bag for coal-fired boiler Active CN114470982B (en)

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WO2017045602A1 (en) * 2015-09-15 2017-03-23 中冶焦耐(大连)工程技术有限公司 Coke oven flue gas desulfurization and denitrification combined purification process and apparatus
CN210874490U (en) * 2019-10-12 2020-06-30 山东百瑞耐火材料有限公司 High temperature resistant sack dust collector
CN211098009U (en) * 2019-11-28 2020-07-28 佛山德滤过滤器材有限公司 Folding dust-removing filter bag capable of increasing filter area
CN113267056A (en) * 2021-06-03 2021-08-17 安徽天顺环保设备股份有限公司 Negative pressure pulse dust collector for ferrosilicon furnace
CN214158888U (en) * 2020-12-07 2021-09-10 湖南优久农牧有限公司 Feed production workshop is with safe explosion-proof sack cleaning device
CN214389299U (en) * 2021-02-19 2021-10-15 湖南天桥环境科技有限公司 High-efficiency bag-type dust collector suitable for ultralow dust emission of waste incineration flue gas
CN215232820U (en) * 2021-06-30 2021-12-21 安徽国能亿盛环保科技有限公司 Multi-drying bag-type dust collector containing water smoke

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017045602A1 (en) * 2015-09-15 2017-03-23 中冶焦耐(大连)工程技术有限公司 Coke oven flue gas desulfurization and denitrification combined purification process and apparatus
CN210874490U (en) * 2019-10-12 2020-06-30 山东百瑞耐火材料有限公司 High temperature resistant sack dust collector
CN211098009U (en) * 2019-11-28 2020-07-28 佛山德滤过滤器材有限公司 Folding dust-removing filter bag capable of increasing filter area
CN214158888U (en) * 2020-12-07 2021-09-10 湖南优久农牧有限公司 Feed production workshop is with safe explosion-proof sack cleaning device
CN214389299U (en) * 2021-02-19 2021-10-15 湖南天桥环境科技有限公司 High-efficiency bag-type dust collector suitable for ultralow dust emission of waste incineration flue gas
CN113267056A (en) * 2021-06-03 2021-08-17 安徽天顺环保设备股份有限公司 Negative pressure pulse dust collector for ferrosilicon furnace
CN215232820U (en) * 2021-06-30 2021-12-21 安徽国能亿盛环保科技有限公司 Multi-drying bag-type dust collector containing water smoke

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