Dust removal filter bag for boiler flue gas

Abstract

The invention discloses a dust removal filter bag for boiler flue gas, and relates to the technical field of dust removal filter bags, the dust removal filter bag comprises a support frame, an initial filter bag is arranged outside the support frame; and the exchange assemblies are arranged on the inner side and the outer side of the supporting frame, and each exchange assembly comprises a flow sensor, a bag hanging piece, an inner supporting piece and a standby exchange piece which are installed on the inner side of the supporting frame. When the initial filter bag is blocked massively and soot cannot be cleaned, a pulse power supply is controlled in time through a flow sensor, so that a suction block relieves limiting support of a magnetic supporting arm rod on an annular gravity strip, a standby filter bag is pulled out and put into use in time, and the equipment does not need to be stopped for a long time for disassembly and replacement in the dust removal period; and the downtime in operation and the frequency of invested maintenance are obviously reduced, the continuity of the production process is ensured, the overall efficiency of the dust removal system is improved, and the maintenance can be carried out in more convenient time without influencing the production.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal filter bags, and particularly to a dust removal filter bag for boiler flue gas. Background Art

[0002] Boiler flue gas refers to the waste gas generated during the combustion process of a boiler. The flue gas contains various gases and solid particles released after fuel combustion. If the boiler flue gas is directly discharged, it will cause air pollution, affect human health and the ecological environment, lead to acid rain, corrode the soil, water bodies and buildings, and carbon dioxide is one of the main greenhouse gases, and its emission exacerbates global warming. In order to reduce the impact of boiler flue gas on the environment, equipment such as dust collectors is commonly used to remove solid particles in the flue gas.

[0003] The dust removal filter bag in a dust collector is a filtering material used to capture suspended particulate matter in air or gas. It is widely used in industrial dust removal systems, can effectively remove flue gas, dust and other pollutants, and ensure that the discharged air meets environmental protection standards. For existing dust removal filter bags, after being used for a period of time, the accumulated soot hanging on the outside of the dust removal filter bag is blown off by the existing electromagnetic pulse technology. However, filter bags all have a service life. Even if the filter bags are regularly cleaned, it is inevitable that some soot will scale on the outer surface of the filter bag and completely block the filter bag. This structured soot cannot be blown off using existing technologies. Therefore, once the above situation occurs during the operation of the dust removal device, the dust removal equipment needs to be shut down, the equipment is disassembled, and the dust removal filter bag is maintained and replaced, resulting in a direct impact on the dust removal efficiency of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a dust removal filter bag for boiler flue gas, which solves the problem that once the dust removal filter bag for boiler flue gas is blocked and cannot be cleared, the dust removal equipment needs to be shut down, the equipment is disassembled, and the dust removal filter bag is replaced, resulting in a direct impact on the dust removal efficiency of the equipment.

[0005] The present invention solves the above technical problems through the following technical solutions. The present invention includes:

[0006] A support frame, with an initial filter bag disposed outside the support frame;

[0007] A replacement component, wherein the replacement component is arranged on the inner and outer sides of the support frame, the replacement component includes a flow sensor, a hanging bag component, an inner support component and a spare part installed on the inner side of the support frame, the hanging bag component is arranged on the outer side of the support frame, the flow sensor is used to control the opening of the hanging bag component, the inner support component is arranged on the inner side of the support frame, the spare part is arranged on the outer side of the inner support component, the inner support component is used to support and hold the spare part, the spare part is connected to the hanging bag component, the hanging bag component is used to put the spare part on the outer side of the inner support component, the hanging bag component includes a magnetic suction displacement mechanism installed under the support frame and a lifting mechanism arranged under the support frame.

[0008] Preferably, the magnetic suction transposition mechanism includes a pulse power supply fixed below the support frame and a plurality of magnetic support arms rotating below the support frame, and a plurality of suction blocks are fixed below the pulse power supply.

[0009] Preferably, the lifting mechanism includes an annular gravity bar arranged below the support frame and a plurality of connecting buckles fixed above the inner support member, a plurality of ropes are fixed to the inner side of the annular gravity bar, one end of the plurality of ropes extend to the interior of the support frame, one end of the plurality of ropes are fixed with metal hooks, and the plurality of metal hooks are respectively buckled with a plurality of connecting buckles.

[0010] Preferably, the inner support member includes a support seat arranged on the inner side of the support frame, a steel frame is fixed above the support seat, a connecting ring is fixed above the steel frame, a mounting ring is arranged on the outer side of the steel frame, and a plurality of connecting buckles are fixed above the mounting ring.

[0011] Preferably, a plurality of connecting holes are opened inside the mounting ring, and the spare parts include a spare filter bag fixed between the support seat and the mounting ring and a plurality of positioning buckles fixed under the connecting ring piece, a plurality of first buckle straps are fixed to the inner side of the spare filter bag, a first draw rope is passed through the inner side of each of the plurality of first buckle straps, one end of each of the plurality of first draw ropes is fixed to the inner side of the spare filter bag, and the other ends of each of the plurality of first draw ropes pass through the plurality of connecting holes and the plurality of positioning buckles in sequence.

[0012] Preferably, a plurality of through holes are opened inside the support frame, a plurality of second buckles are fixed to the inner side of the initial filter bag, a second draw rope is passed through the inner side of each of the plurality of second buckles, one end of each of the plurality of second draw ropes is fixed to the inner side of the initial filter bag, and the other ends of each of the plurality of second draw ropes pass through a plurality of through holes respectively.

[0013] Preferably, the rope is made of nylon or ultra-high molecular weight polyethylene, and sealing sheets are installed on the inner and outer sides of the mounting ring, and the sealing sheets are used to prevent smoke and dust from penetrating under the mounting ring.

[0014] Preferably, a plurality of bolts are fixed above the connecting ring plate. The connecting ring plate is fixedly connected to the support frame through the bolts. A plurality of screw rods are fixed below the support frame. The support frame is fixedly connected to the support base through the plurality of screw rods.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] When the initial filter bag is severely blocked and the soot cannot be cleaned off, the pulse power supply is timely controlled by the flow sensor, so that the suction block releases the limit support of the magnetic support arm rod on the annular gravity bar, thereby pulling out the spare filter bag in time for use. There is no need to shut down the equipment for a long time for disassembly and replacement during dust removal, significantly reducing the downtime during operation and the frequency of maintenance, ensuring the continuity of the production process, improving the overall efficiency of the dust removal system, and enabling maintenance to be arranged at a more convenient time without affecting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure in the present invention;

[0018] Figure 2 is a cross-sectional view of the present invention;

[0019] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0020] Figure 4 is a disassembled schematic diagram of the present invention;

[0021] Figure 5 is Figure 4 an enlarged schematic view of part B in

[0022] Figure 6 is a disassembled schematic diagram of the support frame and the inner support member in the present invention.

[0023] 1. Support frame; 2. Initial filter bag; 3. Replacement assembly; 31. Flow sensor; 32. Pulse power supply; 33. Magnetic support arm rod; 34. Annular gravity bar; 35. Suction block; 36. Rope; 37. Metal hook; 38. Connection buckle; 39. Support base; 310. Steel bar frame; 311. Connecting ring plate; 312. Installation ring; 313. Connection hole; 314. Spare filter bag; 315. Positioning buckle; 316. First buckle belt; 317. First drawstring belt; 4. Perforation; 5. Second buckle belt; 6. Second drawstring belt. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following further describes the above and other technical features and advantages of the present invention in more detail with reference to the accompanying drawings.

[0025] The present invention provides a technical solution: a dust removal filter bag for boiler flue gas, such as Figures 1-6 As shown, it includes a support frame 1 and a replacement component 3, an initial filter bag 2 is arranged on the outside of the support frame 1, a plurality of ring-shaped and equidistantly distributed perforations 4 are opened inside the support frame 1, a plurality of second buckles 5 are fixed on the inner side of the initial filter bag 2, the second buckles 5 are ring-shaped and equidistantly distributed, a second draw rope 6 is passed through the inner side of the plurality of second buckles 5, one end of the plurality of second draw ropes 6 is fixed to the inner side of the initial filter bag 2 and to the lower end of the initial filter bag 2, the other ends of the plurality of second draw ropes 6 pass through the plurality of perforations 4 respectively, and the second draw ropes 6 passing through the perforations 4 are knotted so that the second draw ropes 6 can be tightly fixed on the support frame 1.

[0026] like Figures 1-6 As shown, the exchange component 3 is arranged on the inner and outer sides of the support frame 1. The exchange component 3 includes a flow sensor 31 and a bag hanging part installed on the inner side of the support frame 1. The flow sensor 31 can monitor the flow rate of the flowing medium passing through the initial filter bag 2. When the initial filter bag 2 is blocked, the flow rate will be significantly reduced. The flow sensor 31 can send a signal in time. The bag hanging part is arranged on the outer side of the support frame 1. The flow sensor 31 is used to control the opening of the bag hanging part. The flow sensor 31 is connected to the PLC controller through the existing technology. Similarly, the pulse power supply 32 is also connected to the PLC controller through the existing technology. A threshold value is set in advance for the flow sensor 31 to detect the value so that the PLC controller can start and control the pulse power supply 32. The bag hanging part includes a magnetic suction transposition mechanism installed under the support frame 1 and a lifting mechanism arranged under the support frame 1. The magnetic suction transposition mechanism includes a pulse power supply 32 fixed under the support frame 1 and a plurality of magnetic support arms 33 rotating under the support frame 1. The pulse power supply 32 is fixed below There are multiple suction blocks 35, and the lifting mechanism includes an annular gravity bar 34 arranged below the support frame 1 and multiple connecting buckles 38 fixed above the inner support member. The pulse power supply 32 can generate temporary magnetism for the suction block 35 through short-term high current excitation. Corresponding magnetic sheets are arranged below the annular gravity bar 34 and at the position of the magnetic support arm 33, which are used to limit the position of the magnetic support arm 33. Later, the magnetic support arm 33 will be deflected by the strong suction force of the suction block 35 to release the support for the annular gravity bar 34. Multiple ropes 36 are fixed on the inner side of the annular gravity bar 34. The material of the ropes 36 is nylon or ultra-high molecular weight polyethylene. One end of the multiple ropes 36 extends to the inside of the support frame 1. One end of the multiple ropes 36 is fixed with a metal hook 37. The opening of the metal hook 37 has a certain elasticity, which can open the opening to a certain distance when it is buckled with the connecting buckle 38. After the connecting buckle 38 is buckled, the size of the opening will be restored. The multiple metal hooks 37 are buckled with the multiple connecting buckles 38 respectively.

[0027] like Figures 1-6 As shown, the replacement component 3 also includes an inner support member, which is arranged on the inner side of the support frame 1. The inner support member includes a support seat 39 arranged on the inner side of the support frame 1. A plurality of equally spaced screws are fixed at the bottom of the support frame 1, and a plurality of holes corresponding to the screws are opened on the support seat 39. When the support frame 1 and the inner support member are connected and installed, the screws on the support frame 1 are passed through the holes accordingly, and the support frame 1 is fixedly connected to the support seat 39 by the plurality of screws. A steel frame 310 is fixed above the support seat 39, and a connecting ring piece 311 is fixed above the steel frame 310. A plurality of bolts are fixed above the connecting ring piece 311. 1 is provided with a plurality of openings corresponding to the bolts, and the bolts are passed through the openings to fix the connecting ring piece 311 to the support frame 1. A mounting ring 312 is provided on the outer side of the steel frame 310. The mounting ring 312 can be vertically lifted and lowered by the limitation of the steel frame 310, and when the mounting ring 312 is lifted to the inner wall above the support frame 1, it will contact the inner wall above the support frame 1, and can complete the sealing between the mounting ring 312 and the support frame 1 under the contact between the sealing sheet and the inner wall, so as to prevent the smoke ash from penetrating into the spare filter bag 314 from between the mounting ring 312 and the support frame 1, and a plurality of connecting buckles 38 are fixed on the top of the mounting ring 312.

[0028] like Figures 1-6 As shown, a plurality of connecting holes 313 are provided inside the mounting ring 312, and the replacement assembly 3 also includes a spare part, which is arranged on the outside of the inner support, and the inner support is used to support and hold the spare part, and the spare part is connected to the hanging bag part, and the hanging bag part is used to put the spare part on the outside of the inner support for use, and the spare part includes a spare filter bag 314 fixed between the support seat 39 and the mounting ring 312 and a plurality of positioning buckles 315 fixed under the connecting ring piece 311, and the inner and outer sides of the mounting ring 312 are both equipped with sealing sheets, and when the spare filter bag 314 is piled up on the outside of the support seat 39 for standby, the seal can prevent smoke and dust from penetrating into the mounting ring 312. The spare filter bag 314 is blocked by pollution below the ring 312, and a plurality of first buckles 316 in a ring shape and equidistantly distributed are fixed to the inner side of the spare filter bag 314. The positions of the plurality of first buckles 316 respectively correspond to the positions of the connecting holes 313, and a first draw rope 317 is passed through the interior of the plurality of first buckles 316. One ends of the plurality of first draw ropes 317 are fixed to the inner side of the spare filter bag 314 near the lower end, and the other ends of the plurality of first draw ropes 317 respectively pass through the plurality of connecting holes 313 and the plurality of positioning buckles 315 in sequence and are knotted, so as to fix the first draw rope 317 between the connecting ring piece 311 and the support seat 39.

[0029] During use, the support frame 1 is installed at the corresponding installation position of the dust removal filter bag in the device. During subsequent dust removal, the air with soot will filter out dust through the initial filter bag 2, and the purified air will enter the interior of the initial filter bag 2 and be discharged from the upper port. During use, during the use of the initial filter bag 2, the dust accumulated outside the initial filter bag 2 is usually cleaned regularly by electromagnetic pulses. The time to clean the initial filter bag 2 is before the detection value of the flow sensor 31 is about to be lower than the lowest threshold. And during the use of the initial filter bag 2, the flow sensor 31 inside the support frame 1 will monitor the gas flow in real time. If after cleaning, the gas flow value detected by the flow sensor 31 drops to the pre-set lowest threshold, it means that the initial filter bag 2 can no longer be used. At this time, the flow sensor 31 will send a signal to the PLC controller, and the PLC controller will control the pulse power supply 32 to turn on. The pulse power supply 32 can generate a temporary magnetism in the suction block 35 through short-time high-current excitation. This magnetism is opposite to the magnetism carried by the magnetic support arm 33, so as to attract the magnetic support arm 33 and make the magnetic support arm 33 deflect towards the suction block 35, thereby releasing the support for the annular gravity bar 34. The annular gravity bar 34 will slide down due to its own gravity. During the sliding, it will push the initial filter bag 2 to slide down. With the second drawstring 6 fixed, the initial filter bag 2 will be stacked in a folded shape outside the support frame 1 through the second buckle 5 threaded outside the second drawstring 6, avoiding the initial filter bag 2 floating randomly due to the influence of the surrounding air flow during the later stage, which affects the normal use of the spare filter bag 314.

[0030] During the fall of the annular gravity bar 34, the rope 36 connected to it is simultaneously driven to slide out from the inside of the support frame 1, and the other end of the rope 36 will pull the mounting ring 312 connected to it to rise vertically under the limit of the steel bar frame 310, so as to straighten the stacked spare filter bags 314. The spare filter bags 314 slide up along the first drawstring 317 through the first buckle 316 and unfold, sleeving outside the steel bar frame 310 until the mounting ring 312 is pulled by the rope 36 to fit against the upper inner wall of the support frame 1, and the spare filter bags 314 completely cover the outside of the steel bar frame 310 for subsequent soot filtration use without affecting the later electromagnetic pulse cleaning of the spare filter bags 314.

[0031] When installing between the above-mentioned support frame 1 and the inner support member, first fix one end of the first drawstring 317 of the spare filter bag 314 on the support seat 39, and make multiple first drawstrings 317 pass through multiple connection holes 313 respectively and correspondingly pass through multiple corresponding positioning buckles 315. Tighten and tie the first drawstring 317. Fix the other end of the spare filter bag 314 below the mounting ring 312. Then insert the steel bar frame 310 into the support frame 1, so that the bolts on the connecting ring piece 311 pass through the openings on the support frame 1, and the screw rod below the support frame 1 passes through the corresponding holes on the support seat 39. Fix the connecting ring piece 311 and the support frame 1 with bolts, and fix the support frame 1 and the support seat 39 with the screw rod. Hang the metal hooks 37 on the corresponding connecting buckles 38 in sequence. Put the end of the initial filter bag 2 fixed with the second drawstring 6 on the support frame 1 and fix it at a position near the lower end of the support frame 1. Pass multiple second drawstrings 6 through the corresponding through holes 4 in sequence, tighten and tie them. Then fix the other end of the initial filter bag 2 below the annular gravity bar 34. Move the annular gravity bar 34 to the upper end of the support frame 1, and support multiple magnetic support arm rods 33 below the annular gravity bar 34. Limit the positions of the magnetic support arm rods 33 by the magnetic sheets corresponding to the positions of the annular gravity bar 34 below and the magnetic support arm rods 33, so that the initial filter bag 2 and the spare filter bag 314 are in Figure 2 the position state.

[0032] The above are only the preferred embodiments of the present invention, which are illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims

1. A dust removal filter bag for boiler flue gas, characterized in that: include: A supporting frame (1), wherein an initial filter bag (2) is arranged outside the supporting frame (1); A replacement component (3), wherein the replacement component (3) is arranged on the inner side and the outer side of the support frame (1), the replacement component (3) comprises a flow sensor (31) installed on the inner side of the support frame (1), a hanging bag component, an inner support component and a spare part, the hanging bag component is arranged on the outer side of the support frame (1), the flow sensor (31) is used to control the opening of the hanging bag component, the inner support component is arranged on the inner side of the support frame (1), the spare part is arranged on the outer side of the inner support component, the inner support component is used to support and hold the spare part, the spare part is connected to the hanging bag component, the hanging bag component is used to mount the spare part on the outer side of the inner support component, the hanging bag component comprises a magnetic suction displacement mechanism installed below the support frame (1) and a lifting mechanism arranged below the support frame (1).

2. The dust removal filter bag for boiler flue gas according to claim 1, characterized in that: The magnetic attraction transposition mechanism comprises a pulse power supply (32) fixed below the support frame (1) and a plurality of magnetic support arm rods (33) rotating below the support frame (1), and a plurality of suction blocks (35) are fixed below the pulse power supply (32).

3. The dust removal filter bag for boiler flue gas according to claim 2, characterized in that: The lifting mechanism comprises an annular gravity bar (34) arranged below the support frame (1) and a plurality of connecting buckles (38) fixed above the inner support member, a plurality of ropes (36) are fixed on the inner side of the annular gravity bar (34), one end of each of the ropes (36) extends to the interior of the support frame (1), and a metal hook (37) is fixed at one end of each of the ropes (36), and the plurality of metal hooks (37) are respectively buckled with a plurality of connecting buckles (38).

4. The dust removal filter bag for boiler flue gas according to claim 3, characterized in that: The inner support member comprises a support seat (39) arranged on the inner side of the support frame (1), a steel frame (310) is fixed above the support seat (39), a connecting ring piece (311) is fixed above the steel frame (310), a mounting ring (312) is arranged on the outer side of the steel frame (310), and a plurality of connecting buckles (38) are fixed above the mounting ring (312).

5. The dust removal filter bag for boiler flue gas according to claim 4, characterized in that: A plurality of connection holes (313) are provided inside the mounting ring (312); the replacement part comprises a spare filter bag (314) fixed between the support seat (39) and the mounting ring (312) and a plurality of positioning buckles (315) fixed below the connecting ring piece (311); a plurality of first buckle straps (316) are fixed on the inner side of the spare filter bag (314); a first draw rope (317) is passed through the inner side of each of the plurality of first buckle straps (316); one end of each of the plurality of first draw ropes (317) is fixed to the inner side of the spare filter bag (314); and the other ends of each of the plurality of first draw ropes (317) pass through the plurality of connection holes (313) and the plurality of positioning buckles (315) in sequence.

6. The dust removal filter bag for boiler flue gas according to claim 1, characterized in that: The support frame (1) is provided with a plurality of through holes (4) inside, a plurality of second buckles (5) are fixed to the inner side of the initial filter bag (2), a second draw rope (6) is passed through the inner side of each of the plurality of second buckles (5), one end of each of the plurality of second draw ropes (6) is fixed to the inner side of the initial filter bag (1), and the other end of each of the plurality of second draw ropes (6) passes through the plurality of through holes (4) respectively.

7. The dust removal filter bag for boiler flue gas according to claim 4, characterized in that: The rope (36) is made of nylon or ultra-high molecular weight polyethylene. The inner side and the outer side of the mounting ring (312) are both provided with sealing sheets, and the sealing sheets are used to prevent smoke and dust from penetrating under the mounting ring (312).

8. The dust removal filter bag for boiler flue gas according to claim 4, characterized in that: A plurality of bolts are fixed above the connecting ring piece (311), and the connecting ring piece (311) is fixedly connected to the support frame (1) via the bolts; a plurality of screw rods are fixed below the supporting frame (1), and the supporting frame (1) is fixedly connected to the support seat (39) via the plurality of screw rods.

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