A dust removal filter bag for boiler flue gas

Abstract

The present invention discloses a dust filter bag for boiler flue gas, which relates to the technical field of dust filter bags and includes: a support frame, an initial filter bag is provided on the outside of the support frame; a replacement assembly, the replacement assembly is provided on the inner and outer sides of the support frame, and the replacement assembly includes a flow sensor, a bag hanging part, an inner support part, and a spare part installed on the inner side of the support frame. When the initial filter bag is heavily clogged and the soot cannot be cleaned, the present invention timely controls the pulse power supply through the flow sensor, so that the suction block releases the limiting support of the magnetic support arm on the annular gravity bar, thereby pulling out the spare filter bag and putting it into use in time. There is no need to shut down the equipment for a long time for disassembly and replacement during the dust removal period, which significantly reduces the downtime in operation and the frequency of maintenance, ensures the continuity of the production process, improves the overall efficiency of the dust removal system, and allows maintenance to be arranged at a more convenient time without affecting production.

Description

Technical Field

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

[0002] Boiler flue gas refers to the waste gas generated during the boiler combustion process. The flue gas contains various gases and solid particles released after the fuel is burned. If the boiler flue gas is directly discharged, it will cause air pollution, affect human health and the ecological environment, cause acid rain, and corrode the soil, water bodies and buildings. 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, dust collectors and other equipment are often used to remove solid particles in the flue gas.

[0003] The dust filter bag in the dust collector is a filter material used to capture suspended particulate matter in the air or gas. It is widely used in industrial dust removal systems and can effectively remove smoke, dust and other pollutants to ensure that the discharged air meets environmental protection standards. The existing dust filter bags will use the existing electromagnetic pulse technology to blow off the accumulated smoke hanging on the outside of the dust filter bag every time they are used for a period of time. However, the filter bags have a service life. Even if the filter bags are cleaned regularly, it is inevitable that some smoke will form scale on the outer surface of the filter bag and completely block the filter bag. The smoke of these structures cannot be blown off using existing technology. Therefore, once the dust filter bag encounters the above situation during the operation of the dust removal device, the dust removal equipment needs to be shut down, the equipment needs to be disassembled and the dust filter bag needs to be maintained and replaced, which directly affects 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 traditional dust removal filter bag for boiler flue gas becomes clogged and cannot be cleared, the dust removal equipment needs to be shut down, the equipment needs to be disassembled and the dust removal filter bag needs to be replaced, which directly affects the dust removal efficiency of the equipment.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions, which include:

[0006] A supporting frame, wherein an initial filter bag is provided on the outside of the supporting frame;

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

[0008] Preferably, the magnetic attraction 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 on the inner side of the annular gravity bar, and one end of the plurality of ropes extends to the interior of the support frame. A metal hook is fixed at one end of the plurality of ropes, 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 provided 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 provided inside the mounting ring, and the spare part includes 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 on the inner side of the spare filter bag, a first pull rope is passed through the inside of each of the plurality of first buckle straps, one end of each of the plurality of first pull ropes is fixed to the inner side of the spare filter bag, and the other ends of each of the plurality of first pull ropes pass through the plurality of connecting holes and the plurality of positioning buckles in sequence.

[0012] Preferably, a plurality of through-holes are provided inside the support frame, a plurality of second buckles are fixed to the inner side of the initial filter bag, a second drawstring is passed through the interior of each of the plurality of second buckles, one end of each of the plurality of second drawstrings is fixed to the inner side of the initial filter bag, and the other ends of each of the plurality of second drawstrings 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 piece, and the connecting ring piece is fixedly connected to the support frame through the bolts. A plurality of screw rods are fixed below the support frame, and the support frame is fixedly connected to the support seat through the plurality of screw rods.

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

[0016] When the initial filter bag is heavily clogged and cannot be cleaned of soot, the flow sensor controls the pulse power supply in a timely manner, causing the suction block to release the magnetic support arm from the limit support of the annular gravity bar, thereby pulling out the spare filter bag and putting it into use in time. There is no need to shut down the equipment for a long time for disassembly and replacement during the dust removal period, which significantly reduces the downtime in operation and the frequency of maintenance, ensures the continuity of the production process, improves the overall efficiency of the dust removal system, and allows maintenance to be arranged at a more convenient time without affecting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the present invention;

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

[0019] Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle;

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

[0021] Figure 5 for Figure 4 A magnified schematic diagram of part B in the middle;

[0022] Figure 6 This is a schematic diagram of the disassembly 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; 34. Annular gravity bar; 35. Suction block; 36. Rope; 37. Metal hook; 38. Connecting buckle; 39. Support seat; 310. Steel frame; 311. Connecting ring; 312. Mounting ring; 313. Connecting hole; 314. Spare filter bag; 315. Positioning buckle; 316. First buckle strap; 317. First pull rope strap; 4. Perforation; 5. Second buckle strap; 6. Second pull rope strap. DETAILED DESCRIPTION

[0024] The above and other technical features and advantages of the present invention are described in more detail below 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 Figure 1-6 As shown, it includes a support frame 1 and a replacement component 3. An initial filter bag 2 is provided on the outside of the support frame 1. A plurality of ring-shaped and equidistantly distributed perforations 4 are opened on the inside of the support frame 1. A plurality of second buckles 5 are fixed to the inner side of the initial filter bag 2. The second buckles 5 are ring-shaped and equidistantly distributed. A second drawstring 6 is passed through the inside of the plurality of second buckles 5. One end of the plurality of second drawstrings 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 drawstrings 6 pass through the plurality of perforations 4 respectively, and the second drawstrings 6 passing through the perforations 4 are knotted so that the second drawstrings 6 can be tightly fixed to the support frame 1.

[0026] like Figure 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 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 displacement mechanism installed under the support frame 1 and a lifting mechanism arranged under the support frame 1. The magnetic displacement 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 pulling mechanism includes an annular gravity bar 34 arranged under the support frame 1 and multiple connecting buckles 38 fixed on the top of the inner support member. The pulse power supply 32 can generate temporary magnetism by short-term high current excitation. Corresponding magnetic sheets are provided under 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, under the strong suction force of the suction block 35, the magnetic support arm 33 will deflect and release the support for the annular gravity bar 34. Multiple ropes 36 are fixed to 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 to 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 respectively buckled with the multiple connecting buckles 38.

[0027] like Figure 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 below 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, and the support frame 1 is fixedly connected to the support seat 39 by a 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 outside of the steel frame 310. The mounting ring 312 is limited by the steel frame 310 and can be vertically raised and lowered. When the mounting ring 312 rises 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 piece and the inner wall, so as to prevent the smoke from penetrating into the spare filter bag 314 from between the mounting ring 312 and the support frame 1. A plurality of connecting buckles 38 are fixed above the mounting ring 312.

[0028] like Figure 1-6 As shown, a plurality of connecting holes 313 are provided inside the mounting ring 312. The replacement assembly 3 also includes a spare part. The spare part is arranged on the outside of the inner support part. The inner support part is used to support and hold the spare part. The spare part is connected to the hanging bag part. The hanging bag part is used to put the spare part on the outside of the inner support part for use. 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 below the connecting ring piece 311. The inner and outer sides of the mounting ring 312 are both equipped with sealing sheets. 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 correspond to the positions of the connecting holes 313 respectively. A first pull rope 317 is passed through the interior of the plurality of first buckles 316, and one end of the plurality of first pull ropes 317 is fixed to the inner side of the spare filter bag 314 near the lower end. The other ends of the plurality of first pull ropes 317 pass through the plurality of connecting holes 313 and the plurality of positioning buckles 315 in turn and are knotted, so as to fix the first pull rope 317 between the connecting ring piece 311 and the support seat 39.

[0029] When in use, the support frame 1 is installed at the corresponding installation position of the dust filter bag in the equipment. During the later dust removal, the air with smoke and dust will pass through the initial filter bag 2 to filter out the dust, and the purified air enters the initial filter bag 2 and is discharged from the upper port. During use, during the use of the initial filter bag 2, the dust accumulated on the outside of the initial filter bag 2 is usually cleaned regularly by electromagnetic pulses. The time for cleaning the initial filter bag 2 is before the detection value of the flow sensor 31 is about to fall below the minimum threshold value, and during the use of the initial filter bag 2, the flow sensor 31 on the inside of 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 minimum threshold value set in advance, it means that the initial filter bag 2 can no longer be put into use. At this time, the flow sensor 31 will signal The signal is sent 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 temporary magnetism in the suction block 35 through short-term high current excitation. The magnetism is opposite to the magnetism of the magnetic support arm 33, thereby sucking the magnetic support arm 33 and deflecting the magnetic support arm 33 toward the suction block 35, thereby releasing the support for the annular gravity bar 34. The annular gravity bar 34 will slide down by its own gravity, and will push the initial filter bag 2 to slide down during the decline. When the position of the second pull rope 6 is fixed, the initial filter bag 2 will be stacked in a pleated shape on the outside of the support frame 1 through the second buckle 5 passed through the outside of the second pull rope 6, so as to avoid the initial filter bag 2 from floating around due to the influence of the surrounding airflow in the later stage, affecting the normal use of the spare filter bag 314.

[0030] As the annular gravity bar 34 falls, the rope 36 connected to it is simultaneously driven to slide out from the inside of the support frame 1. 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 frame 310, thereby straightening the stacked spare filter bags 314. The spare filter bags 314 slide up along the first pull rope 317 through the first buckle belt 316 and are spread out, and are sleeved on the outside of the steel frame 310 until the mounting ring 312 is pulled by the rope 36 to fit the upper inner wall of the support frame 1. The spare filter bag 314 is then completely covered on the outside of the steel frame 310 for subsequent smoke and dust filtering, and does not affect the cleaning of the spare filter bag 314 by the later electromagnetic pulse.

[0031] When installing between the above-mentioned support frame 1 and the inner support member, first fix one end of the spare filter bag 314 with the first pull rope 317 on the support seat 39, and make multiple first pull ropes 317 pass through multiple connecting holes 313 respectively, and pass through multiple corresponding positioning buckles 315, tighten the first pull rope 317 and tie it to fix it, and fix the other end of the spare filter bag 314 under the mounting ring 312, then insert the steel frame 310 into the support frame 1, make the bolts on the connecting ring piece 311 pass through the opening on the support frame 1, and the screws under the support frame 1 pass through the corresponding holes on the support seat 39, use bolts to fix the connecting ring piece 311 and the support frame 1, and use screws to fix the support frame The frame 1 and the support seat 39 are fixed, and the metal hooks 37 are hung with the corresponding connecting buckles 38 in turn. One end of the initial filter bag 2 fixed with the second pull rope 6 is put on the support frame 1 and fixed to the position near the lower end of the support frame 1. Multiple second pull ropes 6 are passed through the corresponding perforations 4 in turn, and tightened and knotted to fix them. Then, the other end of the initial filter bag 2 is fixed under the annular gravity bar 34, and the annular gravity bar 34 is moved to the upper end of the support frame 1, and multiple magnetic support arms 33 are supported under the annular gravity bar 34. The magnetic sheet corresponding to the position of the magnetic support arm 33 under the annular gravity bar 34 is used to limit the position of the magnetic support arm 33, so that the initial filter bag 2 and the spare filter bag 314 are in Figure 2 Location status.

[0032] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A dust removal filter bag for boiler flue gas, characterized in that: include: A support frame (1), wherein an initial filter bag (2) is provided outside the support frame (1); A replacement component (3), the replacement component (3) is arranged on the inner side and the outer side of the support frame (1), the replacement component (3) includes 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 put the spare part on the outer side of the inner support component, the hanging bag component includes a magnetic displacement mechanism installed below the support frame (1) and a lifting mechanism arranged below the support frame (1); 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 plurality of 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 plurality of ropes (36), and the plurality of metal hooks (37) are respectively buckled with a plurality of connecting buckles (38); 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 all fixed above the mounting ring (312); A plurality of connection holes (313) are provided inside the mounting ring (312), and 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), and a first drawstring (317) is passed through the interior of each of the plurality of first buckle straps (316). One end of each of the plurality of first drawstring straps (317) is fixed to the inner side of the spare filter bag (314), and the other end of each of the plurality of first drawstring straps (317) passes through the plurality of connection holes (313) and the plurality of positioning buckles (315) in sequence.

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 arms (33) rotating below the support frame (1); 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 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 drawstring (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 drawstrings (6) is fixed to the inner side of the initial filter bag (1), and the other end of each of the plurality of second drawstrings (6) passes through the plurality of through-holes (4).

4. The dust removal filter bag for boiler flue gas according to claim 1, characterized in that: The rope (36) is made of nylon or ultra-high molecular weight polyethylene. The inner and outer sides of the mounting ring (312) are both provided with sealing sheets, which are used to prevent smoke and dust from penetrating under the mounting ring (312).

5. The dust removal filter bag for boiler flue gas according to claim 1, 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 support frame (1), and the support frame (1) is fixedly connected to the support seat (39) via the plurality of screw rods.

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