A bag filter for flue gas

Abstract

The present application relates to cloth bag dust removal technical field, especially to a kind of furnace smoke cloth bag dust removal device.The present application provides a kind of furnace smoke cloth bag dust removal device, including chassis, high-pressure gas tank, gas pipe, high-pressure nozzle, shell and air inlet frame etc., the top of chassis is fixedly connected with shell, the left side upper portion of shell is fixedly connected with air inlet frame, the top of shell is fixedly connected with top frame, and multiple high-pressure gas tanks are equipped in the front side of top frame, and the rear side of each high-pressure gas tank is fixedly connected and is communicated with gas pipe.The present application guides high-pressure airflow to flow closely to the inner wall of dust removal bag by the gas guiding block of narrow top and wide bottom round table, effectively solves the problem that airflow center is concentrated and dust removal bag wall edge cleaning force is insufficient when traditional pulse jet cleaning, realizes uniform and complete stripping of dust layer at each place of dust removal bag inner wall, avoids the problem that filter bag resistance is high and energy consumption increases due to local dust accumulation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cloth bag dust removal, and particularly relates to a furnace flue cloth bag dust removal device. BACKGROUND

[0002] The furnace flue cloth bag dust removal device is a key equipment widely used in the field of industrial flue gas purification, especially in the treatment of high-temperature and high-dust-concentration flue gas generated by coal-fired boilers, metallurgical furnaces and the like. The core principle thereof is to use the filtering effect of porous fiber fabric, so that when the dust-containing flue gas passes through the filter bag, the dust particles are trapped on the outer surface or inside of the filter bag, and the purified gas is discharged through the filter bag. Dust removal is a key link for maintaining dust removal efficiency and long-term operation of the equipment. At present, the most mainstream and widely used is the pulse jet dust removal technology. The technology relies on a high-pressure gas tank to store compressed gas, which is delivered to the spray head arranged above the filter bag through a gas delivery pipeline, so as to spray high-pressure gas flow into the filter bag in a very short time. This high-speed gas flow makes the filter bag instantaneously expand and deform, and generates a reverse airflow from inside to outside, thereby shaking off or peeling off the dust layer attached to the outer surface of the filter bag. The falling dust finally falls into the ash hopper below for centralized treatment.

[0003] Although the pulse jet dust removal technology is relatively mature and widely used, in actual operation, after the high-pressure gas flow is vertically sprayed from the spray head into the top of the filter bag, a concentrated flow beam that is "pushed down" is easily formed. In the case of a large length-diameter ratio of the filter bag, the kinetic energy and diffusion capacity of the high-speed gas flow decrease sharply with the increase of the depth, which leads to that the dust removal effect of the upper part of the filter bag is usually good, while the dust is difficult to be effectively peeled off in the middle and lower parts, especially near the bag bottom, and the blowing force is obviously insufficient. In the process of downward impact of the high-pressure gas flow, local high-pressure points or preferential penetration paths are easily formed in the filter bag, which not only cannot effectively clean the surrounding area of the points, but also may cause excessive stretching or erosion of the local filter material, form a weak point, even break the bag. At the same time, this non-uniform impact is difficult to produce ideal overall shaking effect of the filter bag, and the dust removal efficiency for dust with strong adhesion is low.

[0004] Therefore, it is necessary to design a furnace flue cloth bag dust removal device to solve the above problems. SUMMARY

[0005] In order to overcome the shortcomings of the existing pulse jet dust removal technology that the dust removal efficiency for dust with strong adhesion is low, the present application provides a furnace flue cloth bag dust removal device.

[0006] The technical solution of this invention is: a flue gas bag filter dust collector, comprising a base frame, high-pressure gas tanks, gas delivery pipes, high-pressure nozzles, a housing, an inlet frame, a top frame, a top plate, a first fixing ring, a dust collector bag, a dual-shaft motor, a threaded rod, a sliding block, a rotating block, an air duct block, a rotating fan blade, a dust removal assembly, and a support assembly. The housing is fixedly connected to the top of the base frame. An inlet frame is fixedly connected to the upper left side of the housing. A top frame is fixedly connected to the top of the housing. Multiple high-pressure gas tanks are located on the front side of the top frame. Each high-pressure gas tank is fixedly connected to and connected to a gas delivery pipe on its rear side. A high-pressure nozzle is fixedly connected to the other end of each gas delivery pipe. An outlet is opened on the right side of the top frame. Multiple top plates are fixedly connected to the bottom of the top frame. Each part is fixedly connected to a first fixing ring at the top. The air outlet of each high-pressure nozzle is aligned with the inside of the first fixing ring. The bottom of the first fixing ring extends through the top frame into the housing. A dust collection bag is fixedly connected to the bottom of the first fixing ring. A support assembly for supporting the lower part of the dust collection bag is provided in the lower part of the housing. A dual-axis motor is provided on the support assembly. A threaded rod is fixedly connected to the upper output shaft of the dual-axis motor. A sliding block is threadedly connected to the threaded rod. A rotating block is rotatably connected to the lower part of the sliding block. Rotating fan blades are evenly spaced around the periphery of the rotating block. An air duct is fixedly connected to the bottom of the sliding block. The air duct is shaped like a frustum, narrow at the top and wide at the bottom. The lower edge of the air duct is close to the inner wall of the dust collection bag. A dust discharge assembly is provided inside the base frame.

[0007] Furthermore, the dust removal assembly includes a dust collection hopper, a mounting shell, a servo motor, and a dust collection ring. Two dust collection hoppers are fixedly connected inside the base frame. A mounting shell is fixedly connected to the bottom of each dust collection hopper. A dust collection ring is rotatably connected inside each mounting shell. A servo motor is fixedly connected to the rear bottom of each dust collection hopper. The output shaft of each servo motor is fixedly connected to a corresponding servo motor. When the dust collection ring rotates, the dust in the dust collection hopper will fall out one after another through the dust collection ring.

[0008] Furthermore, the support assembly includes a support frame, a second fixed ring, a rotating ring, a support block, connecting rods, and a connecting frame. The support frame is fixedly connected to the lower side inside the housing. The support frame has the same number of second fixed rings as the number of dust collection bags. The upper part of each second fixed ring is rotatably connected to a rotating ring. The rotating ring is rotatably connected to a support block. The outer edge of the top of the support block is fixedly connected to the bottom of the corresponding dust collection bag. Each support block has two upper dust discharge holes, both of which communicate with the corresponding dust collection bag. The middle of each support block is fixedly connected to a corresponding dual-axis motor. The upper part of the first fixed ring is fixedly connected to a connecting frame. The bottom of the connecting frame has four connecting rods fixedly connected at even intervals along the axial direction. The bottom of each of the four connecting rods is fixedly connected to the support block.

[0009] Furthermore, it also includes a guide plate, which is fixedly connected to the left side of the inside of the housing. The guide plate is located on the right side of the air intake frame and is used to guide the incoming flue gas to the lower part of the housing.

[0010] Further, the rotating ring, the telescopic block and the return spring are further included, the rotating ring is connected around the periphery of the rotating fan blade, the telescopic blocks are uniformly and circumferentially spaced and slidably connected to the outer side of the rotating ring, the return springs are fixedly connected between the telescopic blocks and the rotating ring, when the rotating ring rotates, the telescopic blocks slide out to the outer side of the rotating ring under the centrifugal force, after the telescopic blocks slide out, the telescopic blocks contact the inner wall of the corresponding dust removal bag, and after the telescopic blocks contact the connecting rods in the rotating process, the telescopic blocks are squeezed back into the rotating ring by the connecting rods.

[0011] Further, the lifting ring, the wire winder, the pull rope, the scraping ring and the scraper are further included, the lifting rings are fixedly connected to the upper part of each sliding block, the outer side of the lifting ring is slidably connected to the corresponding connecting rod, the wire winders are fixedly connected to the top of each top plate, the wire wheels are rotatably connected to the left and right sides of each wire winder, the pull ropes are fixedly connected to the left and right sides of the top of the lifting ring, the two pull ropes are wound around the wire wheels of the corresponding wire winders on the top, the two pull ropes are fixedly connected between the other ends, the scraping ring is arranged around the outer side of the corresponding dust removal bag, the scrapers are fixedly connected to the inner front and back sides of each scraping ring, the two scrapers are tightly attached to the outer side of the dust removal bag, and the two scrapers are spirally and obliquely distributed.

[0012] Further, the cleaning ring is further included, the cleaning ring is fixedly connected to the upper output shaft of the double-shaft motor, the bottom of the cleaning ring is in contact with the top of the supporting block, and the outer cleaning blades of the cleaning ring are made of flexible materials, such as soft plastic.

[0013] Further, the rotating plate, the dust removal pipe and the bottom plate are further included, the rotating plate is fixedly connected to the lower output shaft of the double-shaft motor, the two lower dust removal holes are formed in the rotating plate, the dust removal pipes are fixedly connected below the two lower dust removal holes of the rotating plate, the bottom plate is fixedly connected between the lower parts of the two dust removal pipes, the lower output shaft of the double-shaft motor is fixedly connected to the bottom plate, the lower end of the dust removal pipe penetrates through the bottom plate, and the lower end of the dust removal pipe is located above the dust falling hopper.

[0014] Further, the guide rod, the knocking block, the return spring, the top ring, the gear and the tooth ring are further included, the guide rods are rotatably connected to the top of the bottom plate, the surface of the guide rod is in a nodal form, the surface diameter of each node gradually increases from the surface of the uppermost node of the guide rod, each guide rod is rotatably connected to the corresponding rotating ring, each guide rod penetrates through the outer side of the corresponding scraping ring, the sliding groove is formed in each guide rod, each guide rod is slidably connected with the knocking block in the range of each node through the sliding groove, the return spring is fixedly connected between each two knocking blocks, each return spring is located in the corresponding guide rod, the knocking block intermittently hits the corresponding dust removal bag when rotating, the gear is fixedly connected to the top of each guide rod, the top ring is fixedly connected to the inner lower part of each top plate, the tooth ring is fixedly connected to the top of the top ring, and each gear is meshed with the corresponding tooth ring.

[0015] Compared with the prior art, the present application has the following advantages: 1. The present application guides the high-pressure airflow to flow closely to the inner wall of the dust removal bag through the upper narrow and lower wide circular table-shaped air guide block, effectively solves the problem of airflow centering in traditional pulse blowing and insufficient cleaning force at the edge of the bag wall, realizes uniform and complete stripping of the dust layer at all parts of the inner wall of the dust removal bag, and avoids the problem of high filter bag resistance and increased energy consumption caused by local dust accumulation.

[0016] 2. The present application forms a multiple coordinated dust removal mechanism on the inside and outside of the dust removal bag through the cooperation of the rotating ring, the telescopic block, the return spring and the connecting rod, and the setting of the scraping ring and the spiral inclined scraper: the inside realizes periodic beating and scraping of the inner wall by the telescopic block; the outside realizes scraping of the dust on the surface of the bag by the up and down movement of the scraping ring, and the spiral inclined structure effectively prevents dust accumulation on the scraper and guides the dust to slide off, significantly improving the depth and breadth of dust removal.

[0017] 3. The present application controls the communication timing of the lower dust discharge hole and the upper dust discharge hole through the double-shaft motor driven rotating plate, and drives the guide rod to revolve around the dust removal bag through the bottom plate, the top gear of the guide rod meshes with the fixed tooth ring to realize self-rotation of the guide rod, so that the sliding groove on the guide rod drives the knocking block to revolve and rotate, realizes continuous dynamic circumferential knocking and beating of the knocking block on the outside of the dust removal bag, and realizes efficient and automatic linkage of dust removal and dust discharge.

[0018] 4. The present application timely cleans the dust accumulation on the top of the supporting block through the cleaning ring, optimizes the distribution of flue gas entering the shell through the guide plate, realizes controllable dust discharge through the periodic opening and closing of the dust falling ring driven by the servo motor, effectively prevents dust accumulation at the supporting block from affecting dust discharge or forming secondary dust raising, ensures uniform diffusion of flue gas before filtration to improve filtration efficiency, and finally realizes precise control of dust collection and discharge, improving the operation stability and reliability of the entire system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the high-pressure gas tank, gas pipe and high-pressure nozzle of the present application.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the installation shell, servo motor and dust falling ring of the present application.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the second fixed ring, rotating ring and connecting rod of the present application.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the second fixed ring, rotating ring and supporting block of the present application.

[0024] Figure 6 The figure is a perspective view of the components of the threaded rod, connecting rod and connecting frame of the present application.

[0025] Figure 7 The figure is a perspective view of the components of the supporting block, connecting rod and connecting frame of the present application.

[0026] Figure 8 The figure is a perspective view of the components of the sliding block, rotating block and air guiding block of the present application.

[0027] Figure 9 The figure is a perspective view of the components of the rotating block, rotating fan blade and rotating ring of the present application.

[0028] Figure 10 The figure is a perspective view of the components of the sliding block, rotating block and rotating fan blade of the present application.

[0029] Figure 11 The figure is a perspective view of the components of the present application Figure 10 The figure is an enlarged view of A in the present application.

[0030] Figure 12 The figure is a perspective view of the components of the present application

[0031] Figure 13 The figure is a perspective view of the components of the rotating plate, dust removal pipe and bottom plate of the present application.

[0032] Figure 14 The figure is a perspective view of the components of the lifting ring, wire winder and pull rope of the present application.

[0033] Figure 15 The figure is a perspective view of the components of the present application

[0034] Figure 16 The figure is a perspective view of the components of the guide rod, knocking block and return spring of the present application.

[0035] Figure 17 The figure is a perspective view of the components of the guide rod of the present application.

[0036] Figure 18 The figure is a perspective view of the components of the present application Figure 17 The figure is an enlarged view of B in the present application.

[0037] Figure 19 The figure is a perspective view of the components of the second fixing ring, rotating ring and guide rod of the present application.

[0038] Figure 20 The figure is a perspective view of the components of the knocking block, gear and tooth ring of the present application.

[0039] Component names and serial numbers in the diagram: 1: Base frame, 101: High-pressure air tank, 102: Air supply pipe, 103: High-pressure nozzle, 104: Dust collection hopper, 105: Mounting housing, 106: Servo motor, 107: Dust collection ring, 2: Housing, 3: Air inlet frame, 4: Top frame, 5: Air outlet, 6: Guide plate, 7: Top plate, 8: First fixing ring, 9: Dust collection bag, 10: Support frame, 11: Second fixing ring, 12: Rotating ring, 13: Support block, 1301: Upper dust discharge hole, 14: Dual-axis motor, 15: Threaded rod. 16: Connecting rod, 17: Connecting frame, 18: Sliding block, 19: Rotating block, 1901: Air duct block, 20: Rotating fan blade, 21: Rotating ring, 22: Telescopic block, 23: Return spring, 24: Lifting ring, 25: Winder, 26: Pull rope, 27: Scraper ring, 2701: Scraper, 28: Cleaning ring, 29: Rotating plate, 2901: Lower dust discharge hole, 30: Dust discharge pipe, 31: Base plate, 32: Guide rod, 34: Striking block, 35: Return spring, 36: Top ring, 37: Gear, 38: Gear ring. Detailed Implementation

[0040] Example: A bag filter dust collector for furnace flue gas, such as Figures 1-20 As shown, the assembly includes a base frame 1, high-pressure gas tanks 101, gas supply pipes 102, high-pressure nozzles 103, a housing 2, an air inlet frame 3, a top frame 4, a top plate 7, a first fixing ring 8, a dust collection bag 9, a dual-axis motor 14, a threaded rod 15, a sliding block 18, a rotating block 19, an air duct block 1901, a rotating fan blade 20, a dust removal assembly, and a support assembly. The housing 2 is bolted to the top of the base frame 1. The air inlet frame 3 is bolted to the upper left side of the housing 2. The top frame 4 is bolted to the top of the housing 2. Three high-pressure gas tanks 101 are bolted to the front of the top frame 4. Each high-pressure gas tank 101 is fixedly connected to and connected to a gas supply pipe 102 at its rear. A high-pressure nozzle 103 is fixedly connected to the other end of each gas supply pipe 102. An air outlet 5 is opened on the right side of the top frame 4. A dust collection bag 9 is fixedly connected to the bottom of the top frame 4. Three top plates 7, each top plate 7 is fixedly connected to a first fixing ring 8, the air outlet of each high-pressure nozzle 103 is aligned with the inside of the first fixing ring 8, the bottom of the first fixing ring 8 passes through the top frame 4 and extends into the inside of the housing 2, the bottom of the first fixing ring 8 is fixedly connected to a dust collection bag 9, the lower part of the housing 2 is provided with a support assembly for supporting the lower part of the dust collection bag 9, the support assembly is provided with a dual-axis motor 14, the upper output shaft of the dual-axis motor 14 is fixedly connected to a threaded rod 15, the threaded rod 15 is threadedly connected to a sliding block 18, the lower part of the sliding block 18 is rotatably connected to a rotating block 19, the outer periphery of the rotating block 19 is evenly spaced with rotating fan blades 20, the bottom of the sliding block 18 is fixedly connected to an air intake block 1901, the air intake block 1901 is a frustum shape that is narrow at the top and wide at the bottom, the lower edge of the air intake block 1901 is close to the inner wall of the dust collection bag 9, and the base frame 1 is provided with a dust discharge assembly.

[0041] As shown in Figure 2 and Figure 3 , the dust falling assembly includes dust falling hoppers 104, mounting shells 105, servo motors 106 and dust falling rings 107, two dust falling hoppers 104 are fixedly connected to the inside of the chassis 1 by bolts, each dust falling hopper 104 is fixedly connected with a mounting shell 105 at the bottom by bolts, each mounting shell 105 is rotatably connected with a dust falling ring 107 inside, each dust falling hopper 104 is fixedly connected with a servo motor 106 at the bottom rear side by bolts, the output shaft of each servo motor 106 is fixedly connected with the corresponding dust falling ring 107, when the dust falling ring 107 rotates, the dust in the dust falling hopper 104 will fall through the dust falling ring 107 in turn.

[0042] As shown in Figures 2-8 , the support assembly includes a support frame 10, a second fixed ring 11, a rotating ring 12, a support block 13, a connecting rod 16 and a connecting frame 17, the support frame 10 is welded to the inside of the shell 2, three second fixed rings 11 are fixedly connected to the support frame 10, a rotating ring 12 is rotatably connected to the inner upper part of each second fixed ring 11, a support block 13 is rotatably connected to the inside of the rotating ring 12, the top outer edge of the support block 13 is fixedly and sealingly connected to the bottom of the corresponding dust removal bag 9, two upper dust discharging holes 1301 are formed in each support block 13, the two upper dust discharging holes 1301 are communicated with the corresponding dust removal bag 9, the middle part of each support block 13 is fixedly connected with the corresponding double-shaft motor 14, a connecting frame 17 is fixedly connected to the inner upper part of the first fixed ring 8 by bolts, four connecting rods 16 are fixedly and evenly spaced along the axial direction at the bottom of the connecting frame 17, and the bottoms of the four connecting rods 16 are fixedly connected with the support blocks 13.

[0043] As shown in Figure 2 , it further includes a guide plate 6, the guide plate 6 is fixedly connected to the inside left side of the shell 2, the guide plate 6 is located to the right of the air inlet frame 3, and the guide plate 6 is used to guide the entering flue gas to the lower part inside the shell 2.

[0044] As shown in Figures 9-12 , it further includes a rotating ring 21, an expansion block 22 and a return spring 23, the rotating ring 21 is connected around the periphery of the rotating fan blade 20, the expansion block 22 is slidingly connected to the outer side of the rotating ring 21 in a circumferential direction, and the return spring 23 is fixedly connected between the expansion block 22 and the rotating ring 21, when the rotating ring 21 rotates, the expansion block 22 slides out to the outer side of the rotating ring 21 under centrifugal force (as shown in Figure 12 ), after the expansion block 22 slides out, it contacts the inner wall of the corresponding dust removal bag 9, and after contacting the connecting rod 16 in the rotating process, the expansion block 22 is compressed back into the inside of the rotating ring 21 by the connecting rod 16.

[0045] As shown in Figures 13-15As shown, each sliding block 18 upper portion is welded with a lifting ring 24, the outer edge of the lifting ring 24 is slidably connected with the corresponding connecting rod 16, each top plate 7 top left and right sides are fixedly connected with a wire winder 25, each wire winder 25 left and right sides are rotatably connected with a winding wheel, the lifting ring 24 top left and right sides are fixedly connected with a pull rope 26, the two pull ropes 26 pass through the winding wheels on the corresponding wire winders 25 above, and the other ends of the two pull ropes 26 are fixedly connected with a scraping ring 27, the scraping ring 27 is wrapped outside the corresponding dust removal bag 9, and each scraping ring 27 inside front and back sides are fixedly connected with a scraper 2701, the two scrapers 2701 are tightly attached to the outside of the dust removal bag 9, and the two scrapers 2701 are spirally inclined.

[0046] As shown in Figure 19 , it further comprises a cleaning ring 28, and the upper output shaft of the double-shaft motor 14 is fixedly connected with the cleaning ring 28, the bottom of the cleaning ring 28 is in contact with the top of the supporting block 13, and the cleaning blades outside the cleaning ring 28 are made of flexible material, for example, soft plastic, so that when the cleaning blades outside the cleaning ring 28 are in contact with the connecting rod 16 during rotation, the edges of the cleaning blades will adaptively deform, and after passing around the connecting rod 16, the cleaning blades automatically reset to maintain the cleaning effect on the supporting block 13.

[0047] As shown in Figure 13 and Figure 19 , it further comprises a rotating plate 29, a dust removal pipe 30 and a bottom plate 31, the lower output shaft of the double-shaft motor 14 is fixedly connected with the rotating plate 29, two lower dust removal holes 2901 are formed in the rotating plate 29, the top of the rotating plate 29 is in contact with the bottom of the supporting block 13, when the rotating plate 29 rotates, the two lower dust removal holes 2901 will be intermittently connected with the two upper dust removal holes 1301, the two lower dust removal holes 2901 below the rotating plate 29 are fixedly connected with the dust removal pipe 30, and the bottom plate 31 is fixedly connected between the lower portions of the two dust removal pipes 30, the lower output shaft of the double-shaft motor 14 is fixedly connected with the bottom plate 31, the lower end outlet of the dust removal pipe 30 passes through the bottom plate 31, and the lower end outlet of the dust removal pipe 30 is located above the corresponding dust falling hopper 104.

[0048] As shown in Figure 13 , Figure 14 , Figure 16 , Figure 17 , Figure 18 , Figure 19 and Figure 20As shown, it also includes guide rods 32, knocking blocks 34, return springs 35, top rings 36, gearwheels 37 and toothed rings 38, both sides of the top of the bottom plate 31 are rotationally connected with guide rods 32, the surfaces of the guide rods 32 are nodal, and starting from the surface diameter of the uppermost node of the guide rods 32, the surface diameter of each node gradually expands downwards, the lower part of each guide rod 32 is rotationally connected with the corresponding rotating ring 12, each guide rod 32 slides through the outside of the corresponding scraping ring 27, a sliding groove is formed on each guide rod 32, one knocking block 34 is slidably connected in each node of the surface of each guide rod 32 through the sliding groove, the guide rod 32 of the lower part with a larger diameter will block the knocking block 34 of the upper node, that is, each knocking block 34 can be stacked upwards but cannot be stacked downwards, so as to avoid the knocking blocks 34 from being stacked at the bottom, a return spring 35 is fixedly connected between each two knocking blocks 34, each return spring 35 is located inside the corresponding guide rod 32, the knocking blocks 34 will intermittently knock the corresponding dust removal bags 9 when rotating, each guide rod 32 is fixedly connected with a gearwheel 37 at the top, the inner lower part of each top plate 7 is fixedly connected with a top ring 36, the top ring 36 is fixedly connected with a toothed ring 38 at the top, and each gearwheel 37 is engaged with the corresponding toothed ring 38.

[0049] When the device needs to be used, first, the smoke exhaust pipe is aligned with the air inlet frame 3 and is well butted, then the air exhaust pipe is aligned with the air outlet 5 and is butted against the top frame 4, after that, the air exhaust pipe is used to exhaust air against the top frame 4, the dust-containing flue gas in the smoke exhaust pipe is introduced into the inside of the shell 2 through the air inlet frame 3, the flue gas is uniformly diffused to the lower part of the shell 2 after being guided by the guide plate 6, when the flue gas flows upwards through the dust removal bags 9, the dust is intercepted outside the dust removal bags 9, the purified gas is discharged through the air outlet 5 of the top frame 4, as the dust accumulates, the ash removal program needs to be started: the high-pressure gas tank 101 is opened to release high-pressure gas, which is delivered to the high-pressure spray head 103 through the gas delivery pipe 102, after that, the high-pressure airflow is vertically sprayed into the inside of the first fixed ring 8, penetrates the dust removal bags 9 to realize pulse backblowing of the dust.

[0050] The bi-axial motor 14 starts the upper output shaft to rotate forward and backward, drives the threaded rod 15 to rotate forward and backward, and makes the sliding block 18 move up and down along the axial direction. The sliding block 18 drives the air guide block 1901 at the bottom to move synchronously. The circular table structure of the air guide block 1901 guides the airflow to closely blow the inner wall of the dust removal bag 9, so that a better back blowing effect is achieved. The problem of the traditional pulse jet cleaning, i.e. the airflow is concentrated in the center and the cleaning force is insufficient at the edge of the bag wall, is effectively solved. The rotating fan blade 20 on the rotating block 19 is blown and rotated by the high-pressure airflow, drives the rotating ring 21 at the periphery to rotate, and the telescopic block 22 overcomes the resistance of the return spring 23 under the action of centrifugal force to stretch outwards. The return spring 23 is stretched, and the telescopic block 22 directly hits the inner wall of the dust removal bag 9 to improve the falling rate of the dust on the outside. At the same time, when the telescopic block 22 rotates, it scrapes the inner wall of the dust removal bag 9, so that the dust accidentally entering the inner wall of the dust removal bag 9 falls synchronously. When the telescopic block 22 moves to the position of the connecting rod 16, the telescopic block 22 is pressed into the rotating ring 21 by the connecting rod 16, and the return spring 23 is reset. Periodic vibration and dust removal are formed. The dust peeled off on the inside falls into the upper dust discharging hole 1301 of the supporting block 13, and enters the dust discharging pipe 30 through the lower dust discharging hole 2901 on the rotating plate 29, and finally is discharged into the dust falling hopper 104.

[0051] When the sliding block 18 descends, the lifting ring 24 pulls the pull rope 26 to move the scraping ring 27 upwards under the action of the winding wheel of the winder 25. The scraping ring 27 and the scraper 2701 scrape the outside of the dust removal bag 9, and the spiral inclined distribution structure of the scraper 2701 makes it difficult for dust to accumulate on the scraper 2701. With the continuous scraping of the scraper 2701, the dust automatically falls into the dust falling hopper 104 under the guidance of the inclined surface, improving the dust removal efficiency. When the scraping ring 27 moves upwards, the scraping ring 27 pushes the knocking block 34 to gradually move upwards and stack in the sliding groove on the guide rod 32, and the return spring 35 is gradually compressed. When the sliding block 18 descends, the lifting ring 24 moves downwards along the connecting rod 16, releasing the traction of the pull rope 26. The scraping ring 27 is pushed downwards and reset by the knocking block 34 under the joint action of the return spring 35 and gravity, so as to realize bidirectional dust removal of pulse jet and physical scraping.

[0052] When the lower output shaft of the double-shaft motor 14 drives the rotating plate 29 to rotate, the communication timing of the lower dust outlet hole 2901 and the upper dust outlet hole 1301 is controlled. When the lower dust outlet hole 2901 and the upper dust outlet hole 1301 are communicated, the dust in the dust bag 9 enters the dust outlet pipe 30 through the channel formed by the lower dust outlet hole 2901 and the upper dust outlet hole 1301, and finally enters the dust falling hopper 104. When the lower dust outlet hole 2901 and the upper dust outlet hole 1301 are not communicated, the inside of the dust bag 9 remains sealed, so that the high-pressure airflow maintains strong jet force and maintains dust cleaning effect. At the same time, the lower output shaft of the double-shaft motor 14 drives the two guide rods 32 to rotate around the dust bag 9 through the bottom plate 31, and then the two guide rods 32 rotate around the gear ring 38 under the action of the gear 37. In this way, the guide rod 32 drives the knocking block 34 to rotate through the sliding groove, and the knocking block 34 continuously knocks and shakes the dust around the dust bag 9, improving the dust cleaning effect. When the cleaning ring 28 rotates with the upper output shaft of the double-shaft motor 14, the accumulated dust on the top of the support block 13 is scraped, so that the dust in the dust bag 9 is more easily dropped into the upper dust outlet hole 1301, and finally dropped into the dust falling hopper 104 through the lower dust outlet hole 2901 and the dust outlet pipe 30. The dust in the dust falling hopper 104 is periodically opened and closed by the dust falling ring 107 driven by the servo motor 106, realizing controllable discharge. Through the triple synergistic effect of high-pressure blowing, mechanical vibration and scraping dust cleaning, the accumulated dust inside and outside the dust bag 9 is efficiently removed, and automatic dust removal is realized.

Claims

1. A dust collector for furnace flue gas, characterized in that, The utility model relates to a dust removal device, including the chassis (1), high pressure gas tank (101), gas pipe (102), high pressure nozzle (103), casing (2), air inlet frame (3), top frame (4), top plate (7), first fixed ring (8), dust bag (9), double shaft motor (14), threaded rod (15), sliding block (18), rotary block (19), air guide block (1901), rotary fan blade (20), dust removal assembly and support assembly, the top fixed connection of chassis (1) has casing (2), the side fixed connection of casing (2) has air inlet frame (3), the top fixed connection of casing (2) has top frame (4), and top frame (4) side is equipped with a plurality of high pressure gas tank (101), and every high pressure gas tank (101) is fixedly connected and is communicated with gas pipe (102), and every gas pipe (102) other end is fixedly connected with high pressure nozzle (103), and top frame (4) side is set up with gas outlet (5), and top frame (4) inner bottom is fixedly connected with a plurality of top plate (7), and every top plate (7) top is fixedly connected with first fixed ring (8), and the gas outlet of every high pressure nozzle (103) is all aligned first fixed ring (8) inside, and first fixed ring (8) bottom passes through top frame (4) and extends into casing (2) inside, and first fixed ring (8) bottom is fixedly connected with dust bag (9), and the lower part of casing (2) is equipped with support assembly, and support assembly is equipped with double shaft motor (14) on, and double shaft motor (14) upper part output shaft is fixedly connected with threaded rod (15), and threaded rod (15) is screw connected with sliding block (18), and sliding block (18) lower part is rotatably connected with rotary block (19), and rotary block (19) periphery is evenly spaced and is connected with rotary fan blade (20) along the circumference, and sliding block (18) bottom is fixedly connected with air guide block (1901), and air guide block (1901) is the circular platform of upper narrow lower wide, and air guide block (1901) lower part brim is close to the inner wall of dust bag (9), and the inside of chassis (1) is equipped with dust removal assembly.

2. A baghouse for removing dust from flue gas according to claim 1, wherein The dust removal assembly includes dust fall hopper (104), mounting shell (105), servo motor (106) and dust fall ring (107), the inside of chassis (1) is fixedly connected with two dust fall hoppers (104), the bottom of every dust fall hopper (104) is fixedly connected with mounting shell (105), the inside of mounting shell (105) is rotatably connected with dust fall ring (107), the back of every dust fall hopper (104) bottom is fixedly connected with servo motor (106), and every servo motor (106) output shaft is fixedly connected with corresponding dust fall ring (107).

3. A baghouse for removing dust from flue gas according to claim 1, wherein The support assembly comprises a support frame (10), a second fixing ring (11), a rotating ring (12), a support block (13), a connecting rod (16) and a connecting frame (17), the inside lower side of the shell (2) is fixedly connected with the support frame (10), the support frame (10) is fixedly connected with the same number of second fixing rings (11) as the number of the dust removal bags (9), the upper part of each second fixing ring (11) is rotatably connected with the rotating ring (12), the rotating ring (12) is rotatably connected with the support block (13), the top outer side of the support block (13) is fixedly connected with the bottom of the corresponding dust removal bag (9), two upper dust discharging holes (1301) are formed in each support block (13), the two upper dust discharging holes (1301) are communicated with the corresponding dust removal bag (9), the middle part of each support block (13) is fixedly connected with the corresponding double-shaft motor (14), the upper part of the first fixing ring (8) is fixedly connected with the connecting frame (17), the bottom of the connecting frame (17) is fixedly connected with the four connecting rods (16) in the axial direction, and the bottom of the four connecting rods (16) is fixedly connected with the support block (13).

4. A baghouse for removing dust from flue gas according to claim 1, wherein The guide plate (6) is further included, the inside of the shell (2) is fixedly connected with the guide plate (6), the guide plate (6) is located on the right side of the air inlet frame (3), and the guide plate (6) is used for guiding the entering flue gas to the inside lower part of the shell (2).

5. A baghouse precipitator for flue gas according to claim 1, wherein The rotating ring (21), the telescopic block (22) and the return spring (23) are further included, the rotating ring (21) is connected around the outer periphery of the rotating fan blade (20), the telescopic block (22) is slidably connected to the outer side of the rotating ring (21) in the circumferential direction, and the return spring (23) is fixedly connected between the telescopic block (22) and the rotating ring (21).

6. A fabric baghouse dedusting device of a furnace flue gas according to claim 3, characterized in that, The lifting ring (24), the wire winder (25), the pull rope (26), the scraping ring (27) and the scraper (2701) are further included, the upper part of each sliding block (18) is fixedly connected with the lifting ring (24), the outer side of the lifting ring (24) is slidably connected with the corresponding connecting rod (16), the top left and right sides of each top plate (7) are fixedly connected with the wire winder (25), the top left and right sides of the lifting ring (24) are fixedly connected with the pull rope (26), the other ends of the two pull ropes (26) are fixedly connected with the scraping ring (27) after passing through the corresponding wire winder (25) above, the scraping ring (27) is wrapped outside the corresponding dust removal bag (9), the scraper (2701) is fixedly connected to the inner front and back sides of each scraping ring (27), the two scrapers (2701) are tightly attached to the outer side of the dust removal bag (9), and the two scrapers (2701) are distributed in a spiral shape.

7. A fabric baghouse dedusting device of a furnace flue gas according to claim 3, characterized in that, The cleaning ring (28) is further included, the cleaning ring (28) is fixedly connected to the upper output shaft of the double-shaft motor (14), the bottom of the cleaning ring (28) is in contact with the top of the support block (13), and the outer cleaning blade of the cleaning ring (28) is made of flexible material.

8. A fabric baghouse dedusting device of a furnace flue gas according to claim 2, characterized in that, The dust removal pipe (30) is fixedly connected below the two lower dust removal holes (2901) on the rotating plate (29), the bottom plate (31) is fixedly connected between the lower parts of the two dust removal pipes (30), the lower part output shaft of the double-shaft motor (14) is fixedly connected with the bottom plate (31), the lower end outlet of the dust removal pipe (30) penetrates through the bottom plate (31), and the lower end outlet of the dust removal pipe (30) is located above the dust falling hopper (104).

9. A fabric baghouse dedusting device of a furnace flue gas according to claim 6, characterized in that, The guide rod (32), the knocking block (34), the reset spring (35), the top ring (36), the gear (37) and the tooth ring (38) are further included, the guide rod (32) is rotatably connected to the top of the two sides of the bottom plate (31), the surface of the guide rod (32) is in a nodal shape, the surface diameter of each node gradually increases from the surface diameter of the uppermost node of the guide rod (32), each guide rod (32) is rotatably connected with the corresponding rotating ring (12), each guide rod (32) penetrates through the outer side of the corresponding scraping ring (27), each guide rod (32) is provided with a sliding groove, one knocking block (34) is slidably connected in the range of each node on the surface of each guide rod (32) through the sliding groove, the reset spring (35) is fixedly connected between each knocking block (34), each reset spring (35) is located in the corresponding guide rod (32), the knocking block (34) intermittently knocks the corresponding dust removal bag (9) in rotation, the gear (37) is fixedly connected to the top of each guide rod (32), the top ring (36) is fixedly connected to the inner lower part of each top plate (7), the tooth ring (38) is fixedly connected to the top of the top ring (36), and each gear (37) is meshed with the corresponding tooth ring (38).

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