An industrial emission bag filter dust collector based on multi-stage filtration

Abstract

This invention provides an industrial emission baghouse dust collector based on multi-stage filtration, belonging to the technical field of flue gas filtration equipment. It includes a filter box, an exhaust pipe, and an inlet pipe. The filter box contains a shaft tube, one end of which extends into the inlet pipe. The inlet pipe contains multiple barrier meshes distributed along its length, connected to the shaft tube. An excitation coil capable of generating a magnetic field is fitted onto the outer side of the inlet pipe. This invention, by setting multiple barrier meshes inside the inlet pipe and fitting an excitation coil on the outer side, magnetizes the barrier meshes. Magnetic materials (iron, nickel, cobalt) in the gas are adsorbed onto the barrier meshes under the influence of the magnetic field, allowing for individual separation of the magnetic materials. The excitation coil is periodically turned off to clean the magnetic materials from the barrier meshes.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of flue gas filtering equipment, and particularly relates to an industrial emission cloth bag dust removal device based on multi-stage filtering. BACKGROUND

[0002] The cloth bag dust removal device is a high-efficiency dry dust removal device for capturing solid particles in dust-containing gas by using a fiber filter bag. The core principle is to realize gas-solid separation by physical actions such as interception, inertial collision and diffusion adsorption of particles through the porous structure of the filter material, and the purified gas is discharged from the filter bag, and the particles are intercepted on the surface of the filter bag or fall into the ash bucket. The filter bag is cleaned by the pulse blowing system.

[0003] At present, the cloth bag dust removal device only relies on the filter bag to physically filter the dust-containing gas, and when filtering the smoke containing magnetic substances (such as machining workshops and casting workshops), both non-magnetic dust and magnetic dust rely on the filter bag for filtering, which leads to a rapid increase in filter bag resistance value, a corresponding increase in the frequency of pulse back blowing of the filter bag, a reduction in the service life of the filter bag, and an inability to separate non-magnetic dust and magnetic dust in the smoke. SUMMARY

[0004] In view of the above problems, the present application provides an industrial emission cloth bag dust removal device based on multi-stage filtering to at least partially solve the above problems.

[0005] The technical scheme adopted by the present application is as follows: the present application provides an industrial emission cloth bag dust removal device based on multi-stage filtering, comprising:

[0006] A filter box is provided with a partition plate, and a plurality of arrayed filter bags are installed on the partition plate;

[0007] An exhaust pipe is connected to one side of the top of the filter box;

[0008] An air inlet pipe is obliquely arranged on one side of the bottom of the filter box, and the two ends of the air inlet pipe extend to the inside and outside of the filter box;

[0009] The filter box is provided with a shaft pipe, one end of the shaft pipe extends into the air inlet pipe, a plurality of barrier nets are arranged in the length direction of the air inlet pipe, the barrier nets are connected to the shaft pipe, and an excitation coil capable of generating a magnetic field is arranged outside the air inlet pipe, so that the barrier nets can be magnetized by the excitation coil.

[0010] A deslagging channel for deslagging is arranged between the inner wall of the air inlet pipe and the barrier net.

[0011] Further, one end of the shaft tube is provided with a vibration module for driving the shaft tube and the barrier net to vibrate.

[0012] Further, the barrier net comprises a sleeve and fins, the sleeve is sleeved on the outer sidewall of the shaft tube, and the fins are provided in plurality and uniformly distributed around the outside of the sleeve.

[0013] Further, the fins are provided in hollow structure with openings at both ends, so that the inside forms a channel for the flow of cooling liquid;

[0014] The inside of the sleeve is provided with a communication cavity, one end of the fin communicates with the communication cavity, the outside of the sleeve is sleeved with a return pipe, and the other end of the fin communicates with the return pipe;

[0015] The shaft tube is connected with an external cooling liquid conveying device, and the communication cavity communicates with the shaft tube.

[0016] Further, the shaft tube is provided with a plurality of water conveying holes corresponding to the sleeve along the length direction of the shaft tube, and the communication cavity communicates with the shaft tube through the water conveying hole.

[0017] Further, the inside of the filter box is provided with a backwater pipe, and the return pipe is connected with the backwater pipe.

[0018] Further, one end of the return pipe is connected with a hose, and the hose penetrates the air inlet pipe and is connected with the backwater pipe.

[0019] Further, the inside of the filter box is provided with two support frames, and the excitation coil is connected between the two support frames.

[0020] Further, the filter box is provided with a blowing pipe above the partition plate, the blowing pipe comprises a plurality of blowing ends corresponding to the filter bags, and the blowing ends are directed to the openings of the filter bags.

[0021] Further, the bottom of the filter box is provided with a dust hopper for collecting dust.

[0022] The beneficial effects achieved by the above structure are as follows:

[0023] 1. By arranging a plurality of barrier nets inside the air inlet pipe and sleeving an excitation coil outside the air inlet pipe, the excitation coil magnetizes the barrier nets in the air inlet pipe, so that the magnetic substances (iron, nickel, cobalt) in the gas are adsorbed on the barrier nets under the action of the magnetic field, so that the magnetic substances can be separated alone, and the excitation coil is closed periodically to clean the magnetic substances on the barrier nets.

[0024] 2. By setting the fins of the barrier net as a hollow structure, and inputting cooling liquid into the plurality of fins, the cooling liquid can be used to cool the gas, avoiding high-temperature gas reducing the service life of the filter bag. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structure schematic view of an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0026] Figure 2 An internal structure schematic view of an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0027] Figure 3 A structure schematic view of an air inlet pipe and an excitation coil in an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0028] Figure 4 An internal structure schematic view of an air inlet pipe in an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0029] Figure 5 An end surface structure schematic view of an air inlet pipe in an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0030] Figure 6 A structure schematic view of a shaft pipe in an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0031] Figure 7 A structure schematic view of a barrier net in an industrial emission cloth bag dust removal device based on multi-stage filtration is provided for the embodiment of the present application.

[0032] Among them, 1, filter box; 11, partition; 12, filter bag; 13, injection pipe; 14, ash bucket; 2, exhaust pipe; 3, air inlet pipe; 301, deslagging channel; 4, shaft pipe; 401, water delivery hole; 5, barrier net; 51, sleeve; 52, fin; 53, return pipe; 54, hose; 501, communication cavity; 6, water return pipe; 7, vibration module; 8, excitation coil; 9, support frame.

[0033] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation on the present application. DETAILED DESCRIPTION

[0034] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described in the description of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application; based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] As shown in Figure 1 The present application proposes a multi-stage filtering-based industrial exhaust cloth bag dust removal device, which comprises a filter box 1, a partition plate 11, filter bags 12, an exhaust pipe 2 and an air inlet pipe 3.

[0037] The partition plate 11 is arranged inside the filter box 1, and a plurality of holes for mounting the filter bags 12 are arranged on the partition plate 11. The filter bags 12 are arranged in the holes of the partition plate 11, and the filter bags 12 have a barrel-shaped structure with an open end. The open end of the filter bag 12 faces upward above the partition plate 11. A support is arranged inside the filter bag 12 to support the filter bag 12 and prevent the filter bag 12 from deforming under the action of air pressure.

[0038] The filter box 1 is divided into two chambers by the partition plate 11 and the filter bags 12. The lower part of the partition plate 11 is a filter chamber for dust-containing gas, and the upper part of the partition plate 11 is a gas discharge chamber for filtered gas.

[0039] The exhaust pipe 2 is connected to one side of the top of the filter box 1 and communicates with the gas discharge chamber. The exhaust pipe 2 is connected to a draft fan, and the filtered gas is discharged through the exhaust pipe 2. The air inlet pipe 3 is arranged obliquely at one side of the bottom of the filter box 1, and the two ends of the air inlet pipe 3 extend to the inside and outside of the filter box 1, so that the air inlet pipe 3 communicates with the filter chamber. The external dust-containing gas is transported into the filter chamber of the filter box 1 through the air inlet pipe 3.

[0040] Further, a blowing pipe 13 is arranged in the filter box 1, and the blowing pipe 13 is located above the partition plate 11. The blowing pipe 13 comprises a plurality of blowing ends corresponding to the filter bags 12, and the blowing ends face the openings of the filter bags 12. The blowing pipe 13 blows high-pressure air towards the filter bags 12 through the blowing ends to blow back the filter bags 12 and restore the filtering effect of the filter bags 12.

[0041] In a specific embodiment, the blowing pipe 13 is connected with an external high-pressure gas tank through a pulse valve, the opening frequency of the pulse valve is set, the pulse valve is opened regularly, the high-pressure gas tank supplies gas to the blowing pipe 13 through the opening of the pulse valve, the filter bag 12 is pulse backblown by the blowing end of the blowing pipe 13, and the filtering effect of the filter bag 12 is restored.

[0042] Thus, under the action of the induced draft fan, the external dust-containing gas is transported into the filtering chamber of the filter box 1 through the air inlet pipe 3, under the action of the gas pressure, the dust-containing gas passes through the filter bag 12, the dust in the gas is blocked by the filter bag 12, the filtered gas enters the gas discharge chamber through the opening of the filter bag 12, and then is discharged through the air outlet pipe 2. The pulse valve is opened regularly according to the set opening frequency, the high-pressure gas tank supplies gas to the blowing pipe 13, the filter bag 12 is pulse backblown by the blowing end of the blowing pipe 13, and the filtering effect of the filter bag 12 is restored.

[0043] Combining Figure 1 and Figure 2 As shown in the drawings, the bottom of the filter box 1 is provided with a dust hopper 14 for collecting dust, the dust falling off the filter bag 12 and the dust in the gas falling by gravity are all fallen into the dust hopper 14, and the bottom of the dust hopper 14 is provided with a valve, and the dust collected in the dust hopper 14 is discharged by opening the valve.

[0044] Combining Figure 1 , Figure 3 and Figure 4 As shown in the drawings, the filter box 1 is provided with a shaft pipe 4, one end of the shaft pipe 4 extends into the air inlet pipe 3, the air inlet pipe 3 is provided with a plurality of blocking nets 5 distributed along the length direction, the blocking nets 5 are connected to the shaft pipe 4 and supported by the shaft pipe 4, and the dust-containing gas introduced through the air inlet pipe 3 needs to pass through the plurality of blocking nets 5 in sequence.

[0045] The outer side of the air inlet pipe 3 is provided with an excitation coil 8 capable of generating a magnetic field, the excitation coil 8 magnetizes the blocking nets 5 in the air inlet pipe 3, when the dust-containing gas passes through the blocking nets 5, the magnetic substances (iron, nickel, and cobalt) in the gas are adsorbed on the blocking nets 5 under the action of the magnetic field, so as to reduce the dust content in the gas, and the blocking nets 5 are used for primary filtering of the gas.

[0046] Combining Figure 2 and Figure 5 As shown in the drawings, a deslagging channel 301 for deslagging is arranged between the inner wall of the air inlet pipe 3 and the blocking nets 5, the air inlet pipe 3 is installed in an inclined manner, and the low end of the inclination is located in the filter box 1 (as shown in the drawings), and correspondingly, the deslagging channel 301 can be inclined. Figure 2

[0047] It should be noted that the inclination angle of the air inlet pipe 3 is sufficient to make the dust falling on the inner wall bottom of the air inlet pipe 3 fall and be discharged by gravity.

[0048] ​Therefore, by closing the excitation coil 8, the magnetic field of the barrier net 5 is removed, the magnetic material adsorbed on the barrier net 5 due to the magnetic field is dropped, and falls into the slag discharge channel 301 between the inner wall of the air inlet pipe 3 and the barrier net 5. Since the slag discharge channel 301 is inclined, the magnetic material falling into the slag discharge channel 301 slides downward and finally falls into the ash hopper 14, thereby cleaning the barrier net 5. The excitation coil 8 is set to be closed at a certain frequency, so that the barrier net 5 can be cleaned regularly.

[0049] It can be understood that before closing the excitation coil 8 to clean the magnetic material on the barrier net 5, the non-magnetic dust in the ash hopper 14 can be emptied first, and then the excitation coil 8 is closed for cleaning. At this time, the magnetic material can be separated alone and then discharged, so as to separate the non-magnetic material and the magnetic material in the smoke dust, facilitating subsequent recycling and reuse.

[0050] Further, by installing a distributor at the bottom of the ash hopper 14 and connecting a non-magnetic material discharge pipe and a magnetic material discharge pipe to two discharge ends of the distributor respectively, when the equipment is normally filtered, the distributor is switched to communicate with the non-magnetic material discharge pipe, and the non-magnetic material in the ash hopper 14 is discharged through the non-magnetic material discharge pipe. When the excitation coil 8 is closed to clean the magnetic material on the barrier net 5, the distributor is switched to communicate with the magnetic material discharge pipe, and the magnetic material can be discharged through the magnetic material discharge pipe.

[0051] In this way, when filtering the dust-containing gas, the excitation coil 8 is opened to generate an electromagnetic field, the excitation coil 8 magnetizes the barrier net 5 in the air inlet pipe 3, the dust-containing gas is introduced from the air inlet pipe 3 and passes through the plurality of barrier nets 5 in turn, and when the dust-containing gas passes through the barrier net 5, the magnetic material (iron, nickel, and cobalt) in the gas is adsorbed on the barrier net 5 under the action of the magnetic field, thereby reducing the dust content in the gas, and the barrier net 5 is used to preliminarily filter the gas.

[0052] According to the set frequency, the excitation coil 8 is closed regularly to demagnetize the barrier net 5. At this time, the magnetic material adsorbed on the barrier net 5 due to the magnetic field is dropped and falls into the slag discharge channel 301 between the inner wall of the air inlet pipe 3 and the barrier net 5. Since the slag discharge channel 301 is inclined, the magnetic material falling into the slag discharge channel 301 slides downward and finally falls into the ash hopper 14, thereby cleaning the barrier net 5. Meanwhile, before closing the excitation coil 8 to clean the magnetic material on the barrier net 5, the non-magnetic dust in the ash hopper 14 can be emptied first, and then the excitation coil 8 is closed for cleaning. At this time, the magnetic material can be separated alone and then discharged, so as to separate the non-magnetic material and the magnetic material in the smoke dust, facilitating subsequent recycling and reuse.

[0053] In specific embodiments, the inside of the filter box 1 is provided with two support frames 9, and the excitation coil 8 is connected between the two support frames 9, and the excitation coil 8 is stably supported by the two support frames 9.

[0054] In combination Figure 4 As shown in the figure, one end of the shaft tube 4 is provided with a vibration module 7 for driving the shaft tube 4 and the barrier net 5 to vibrate, the vibration module 7 includes a vibration motor and a protective shell, the vibration motor is installed in the protective shell, when the excitation coil 8 is turned off, the barrier net 5 is cleaned, at the same time, the shaft tube 4 and the barrier net 5 are driven to vibrate by the vibration motor, so that the magnetic substances on the barrier net 5 can be better detached.

[0055] It should be noted that the amplitude of the vibration module 7 is small, which avoids damage to the shaft tube 4 and the barrier net 5 caused by excessive amplitude, and at the same time, the connection between the shaft tube 4 and the filter box 1 is elastically buffered by a rubber connecting piece, which avoids the connection between the shaft tube 4 and the filter box 1 from being separated due to vibration.

[0056] In combination Figure 7 As shown in the figure, the barrier net 5 includes a sleeve 51 and fins 52, the sleeve 51 is sleeved on the outer side wall of the shaft tube 4, and the fins 52 are provided in plurality and uniformly distributed around the outside of the sleeve 51, the fins 52 are made of metal material that can be magnetized by a magnetic field, and the fins 52 are magnetized by the excitation coil 8, so that the magnetic substances in the gas are adsorbed on the fins 52.

[0057] At the same time, under the barrier effect of the fins 52 of the plurality of barrier nets 5, the speed of the gas flowing through the barrier net 5 is slowed down, and the non-magnetic particles with large weight can be blocked by the fins 52 and can fall by gravity, further reducing the particulate matter content in the gas, accordingly, the pulse blowing interval time of the filter bag 12 can be prolonged, and the service life of the filter bag 12 can be increased.

[0058] In combination Figure 6 And Figure 7 As shown in the figure, the fins 52 are provided in a hollow structure with openings at both ends, so that a channel for the flow of cooling liquid is formed inside the fins 52;

[0059] The inside of the sleeve 51 is provided with a communication cavity 501, the shaft tube 4 is connected with an external cooling liquid conveying device, the communication cavity 501 is communicated with the shaft tube 4, the external cooling liquid conveying device conveys the cooling liquid into the communication cavity 501 through the shaft tube 4, one end of the fin 52 is communicated with the communication cavity 501, the cooling liquid is input into the fin 52 from the communication cavity 501, the outside of the sleeve 51 is sleeved with a return pipe 53, the other end of the fin 52 is communicated with the return pipe 53, and the cooling liquid flows through the fin 52 and is input into the return pipe 53, so that the cooling liquid always flows inside the fin 52.

[0060] By inputting the cooling liquid into the plurality of fins 52, the gas can be cooled, and the high-temperature gas can be avoided to reduce the service life of the filter bag 12.

[0061] In specific embodiments, the shaft pipe 4 is provided with a plurality of water delivery holes 401 corresponding to the sleeve pipes 51 along the length direction of the shaft pipe 4, and the sleeve pipes 51 are sealingly sleeved on the shaft pipe 4 and installed at the corresponding water delivery holes 401, so that the communication cavities 501 communicate with the shaft pipe 4 through the water delivery holes 401.

[0062] In combination Figure 3 And Figure 4 As shown in the figure, the inside of the filter box 1 is provided with a backwater pipe 6, and the backflow pipe 53 is connected with the backwater pipe 6. After the cooling liquid flows through the fins 52, it is input into the backflow pipe 53, and then is uniformly collected into the backwater pipe 6 through the backflow pipe 53, and is returned to the external cooling liquid conveying device for recycling after being cooled and cooled down.

[0063] In specific embodiments, one end of the backflow pipe 53 is connected with a hose 54, the hose 54 penetrates through the air inlet pipe 3 and is connected with the backwater pipe 6. When the vibration module 7 drives the whole vibration of the barrier net 5, the hose 54 can absorb the vibration and maintain the waterway connection.

[0064] In this way, while filtering, the external cooling liquid conveying device delivers cooling liquid into the communication cavities 501 of the sleeve pipes 51 through the shaft pipe 4, the cooling liquid is input into the fins 52 from the communication cavities 501, and after the cooling liquid flows through the fins 52, it is input into the backflow pipe 53, and then is uniformly collected into the backwater pipe 6 through the backflow pipe 53, and is returned to the external cooling liquid conveying device, so that the inside of the fins 52 always has cooling liquid flowing. By inputting cooling liquid into the plurality of fins 52, the gas can be cooled, and the service life of the filter bag 12 can be reduced by avoiding high-temperature gas.

[0065] The working principle of the present application: when filtering dust-containing gas, the excitation coil 8 is opened to generate an electromagnetic field, the excitation coil 8 magnetizes the barrier net 5 in the air inlet pipe 3, under the action of the induced draft fan, the dust-containing gas is introduced from the air inlet pipe 3 and passes through the plurality of barrier nets 5 in turn, when the dust-containing gas passes through the barrier net 5, the magnetic material (iron, nickel, cobalt) in the gas is adsorbed on the barrier net 5 under the action of the magnetic field, thereby reducing the dust content in the gas, and the barrier net 5 is used to preliminarily filter the gas;

[0066] After the gas is filtered by the barrier net 5 of the air inlet pipe 3, it is delivered into the filter chamber of the filter box 1, under the action of the gas pressure, the dust-containing gas passes through the filter bag 12, the dust in the gas is blocked by the filter bag 12, and the filtered gas enters the gas discharge chamber through the opening of the filter bag 12, and then is discharged through the exhaust pipe 2;

[0067] The pulse valve is opened regularly according to the set opening frequency, the high-pressure gas tank supplies gas to the blowing pipe 13, and the filter bag 12 is pulse back-flushed from the blowing end of the blowing pipe 13 to restore the filtering effect of the filter bag 12;

[0068] According to the set frequency, the excitation coil 8 is closed periodically, so that the barrier net 5 is demagnetized, at this time, the magnetic material adsorbed on the barrier net 5 due to the magnetic field falls off and falls into the slag discharge channel 301 between the inner wall of the air inlet pipe 3 and the barrier net 5, since the slag discharge channel 301 is inclined, the magnetic material falling into the slag discharge channel 301 slides downward and finally falls into the ash bucket 14, playing a role of cleaning the barrier net 5;

[0069] At the same time, before closing the excitation coil 8 to clean the magnetic material on the barrier net 5, the non-magnetic dust in the ash bucket 14 can be emptied first, and then the excitation coil 8 is closed for cleaning, at this time, the magnetic material can be separated alone and then discharged, so as to separate the non-magnetic material and the magnetic material in the flue dust, facilitating subsequent recycling and reuse;

[0070] At the same time, before closing the excitation coil 8 to clean the magnetic material on the barrier net 5, the non-magnetic dust in the ash bucket 14 can be emptied first, and then the excitation coil 8 is closed for cleaning, at this time, the magnetic material can be separated alone and then discharged, so as to separate the non-magnetic material and the magnetic material in the flue dust, facilitating subsequent recycling and reuse;

[0071] In summary of the above embodiments: by arranging a plurality of barrier nets 5 inside the air inlet pipe 3, and arranging an excitation coil 8 outside the air inlet pipe 3, the excitation coil 8 magnetizes the barrier nets 5 inside the air inlet pipe 3, under the action of the induced draft fan, the dust-containing gas is introduced from the air inlet pipe 3 and passes through the plurality of barrier nets 5 in turn, when the dust-containing gas passes through the barrier net 5, the magnetic material (iron, nickel, cobalt) in the gas is adsorbed on the barrier net 5 under the action of the magnetic field, thereby reducing the dust content in the gas, the barrier net 5 is used for primary filtration of the gas, and the excitation coil 8 is set to be closed at a certain frequency, so that the barrier net 5 is demagnetized, thereby being able to clean the barrier net 5 periodically.

[0072] At the same time, before closing the excitation coil 8 to clean the magnetic material on the barrier net 5, the non-magnetic dust in the ash bucket 14 can be emptied first, and then the excitation coil 8 is closed for cleaning, at this time, the magnetic material can be separated alone and then discharged, so as to separate the non-magnetic material and the magnetic material in the flue dust, facilitating subsequent recycling and reuse.

[0073] By arranging the fins 52 of the barrier net 5 as a hollow structure and inputting cooling liquid into the plurality of fins 52, the cooling liquid can be used to cool the gas, avoiding that high-temperature gas reduces the service life of the filter bag 12.

[0074] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; thus the use of any

[0075] The above description of the application and its embodiments is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the application.

Claims

1. A multi-stage filtration based industrial exhaust baghouse dedusting device, characterized in that, include: The filter box (1) has a partition (11) inside, on which multiple arrayed filter bags (12) are installed. An exhaust pipe (2) is connected to the top side of the filter box (1); An air inlet pipe (3) is inclinedly disposed on one side of the bottom of the filter box (1), and both ends of the air inlet pipe (3) extend to the inner and outer sides of the filter box (1). The filter box (1) is provided with a shaft tube (4), one end of which extends into the air inlet pipe (3). The air inlet pipe (3) is provided with a plurality of barrier nets (5) distributed along the length direction. The barrier nets (5) are connected to the shaft tube (4). An excitation coil (8) capable of generating a magnetic field by being energized is sleeved on the outside of the air inlet pipe (3), so that the barrier nets (5) can be magnetized by the excitation coil (8). A slag discharge channel (301) for slag discharge is provided between the inner wall of the air inlet pipe (3) and the barrier net (5). The barrier net (5) includes a sleeve (51) and fins (52). The sleeve (51) is sleeved on the outer wall of the shaft tube (4). The fins (52) are provided in multiples and are evenly distributed around the outer side of the sleeve (51). The fins (52) are configured as hollow structures with openings at both ends, so that channels for coolant flow are formed inside. The inner side of the sleeve (51) is provided with a connecting cavity (501), one end of the fin (52) is connected to the connecting cavity (501), the outer side of the sleeve (51) is provided with a return pipe (53), and the other end of the fin (52) is connected to the return pipe (53). The shaft tube (4) is connected to an external coolant delivery device, and the connecting cavity (501) is connected to the shaft tube (4); The shaft tube (4) has a plurality of water inlets (401) corresponding to the sleeve (51) along its own length direction, and the connecting cavity (501) is connected to the shaft tube (4) through the water inlets (401); The filter box (1) is equipped with a return water pipe (6) inside, and the return pipe (53) is connected to the return water pipe (6); One end of the return pipe (53) is connected to a flexible hose (54), which passes through the air inlet pipe (3) and is connected to the water return pipe (6).

2. The multi-stage filtration based industrial exhaust baghouse dedusting device according to claim 1, wherein: One end of the shaft tube (4) is provided with a vibration module (7) for driving the shaft tube (4) and the barrier net (5) to vibrate.

3. The multi-stage filtration based industrial exhaust baghouse dedusting device according to claim 1, wherein: The filter box (1) is provided with two support frames (9) inside, and the excitation coil (8) is connected between the two support frames (9).

4. The multi-stage filtration based industrial exhaust baghouse dedusting device according to claim 1, wherein: The filter box (1) is provided with a blow pipe (13), which is located above the partition (11). The blow pipe (13) includes a number of blow ends corresponding to the filter bag (12), and the blow ends face the opening of the filter bag (12).

5. The multi-stage filtration based industrial exhaust baghouse dedusting device according to claim 1, wherein: The bottom of the filter box (1) is provided with a dust hopper (14) for collecting dust.

Images