A metal filter bag, a method for cleaning the metal filter bag, and a dust collector

Abstract

The present invention provides a metal filter bag, a method for cleaning the metal filter bag, and a dust collector. The metal filter bag includes a metal filter screen and a folding layer. A plurality of metal filter screens and folding layers are alternately connected to form a cylindrical filter screen unit; the metal filter bag further includes a folding connection part. A plurality of filter screen units are connected in sequence along the length direction, and two adjacent metal filter screens corresponding to two adjacent filter screen units are connected by the folding connection part and can rotate around the folding connection part to be straightened or folded. With the above structure, each metal filter screen connected by the folding connection part rotates around the folding connection part in the opposite direction. In this way, the whole metal filter bag can be folded. In the folded state, the metal filter screens are stacked together, and the volume of the metal filter bag is small and it is not easily squeezed and deformed, which is convenient for transportation; when installing, only need to lift the folded metal filter bag, and the metal filter screen rotates around the folding connection part under the action of gravity and automatically straightens, which is convenient for installation.

Description

Technical Field

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

[0002] Existing power plants usually use an electric-bag composite dust collector to remove dust from flue gas. The filter bag is the core component in the electric-bag composite dust collector and is used to filter the dust that has not been captured by the power plant. The filter bag is divided into a fiber woven fabric filter material and a metal filter material. The fiber woven fabric has a certain flexibility and can be stretched and deformed to a certain extent, but it requires an internal support frame for support. The metal filter material has a certain rigidity and strength, does not require a supporting frame, and has a longer service life.

[0003] A conventional metal filter bag can be as high as 8 meters and needs to be installed in more than three sections. Each section of the metal filter bag needs to be provided with connecting devices such as chucks or buckles. The connecting structure is relatively complex, the installation is difficult, and the cost is relatively high. In addition, during transportation, the metal filter bags can only be stacked layer by layer, which easily causes the metal filter bags to be squeezed and deformed.

[0004] Therefore, how to provide a metal filter bag that is convenient for installation and transportation is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a metal filter bag that is convenient for installation and transportation.

[0006] To solve the above technical problems, the present invention provides a metal filter bag, which includes a metal filter mesh and a folding layer. A plurality of the metal filter meshes and the folding layer are alternately connected to form a cylindrical filter mesh unit; the metal filter bag further includes a folding connection part. A plurality of the filter mesh units are connected in sequence along the length direction. The two metal filter meshes corresponding to two adjacent filter mesh units are connected by the folding connection part and can rotate around the folding connection part to be straightened or folded.

[0007] With the above structure, each metal filter mesh connected by the folding connection part rotates around the folding connection part in the opposite direction. In this way, the whole metal filter bag can be folded. In the folded state, the metal filter meshes are stacked together, and the volume of the metal filter bag is small and it is not easily squeezed and deformed, which is convenient for transportation; during installation, only the folded metal filter bag needs to be lifted, and the metal filter mesh rotates around the folding connection part under the action of gravity and is automatically straightened, which is convenient for installation.

[0008] Optionally, the folding connection part includes a rubber layer. The rubber layer covers the connection part of two adjacent metal filter meshes, and the rubber layer seals the connection part.

[0009] Optionally, the folding connection part further includes a sliding ring. The metal filter screen is provided with holes. The sliding ring passes through the holes of two adjacent metal filter screens along the length direction and connects the two, and the metal filter screen can rotate around the sliding ring; the sliding ring is located within the rubber layer.

[0010] Optionally, the rubber layer is bent around the middle, and the bending direction is the same as the folding direction of two adjacent metal filter screens.

[0011] Optionally, it further includes a bag tail and / or a bag head. The bag tail is arranged at the end of the metal filter bag, and the bag head is arranged at the top of the metal filter bag.

[0012] Optionally, it further includes a transmission part and a lifting mechanism. One end of the transmission part is fixedly connected to the bag tail, and the other end is fixedly connected to the lifting mechanism. The lifting mechanism can lift the transmission part and drive the metal filter bag to be gradually folded from the bag tail.

[0013] Optionally, the lifting mechanism is simultaneously provided with a vibration driving part, and the vibration force is transmitted through the transmission part.

[0014] Optionally, it further includes an anti-sway frame. The anti-sway frame includes an open-hole ring and a plurality of fixing rods connected to the open-hole ring. The plurality of fixing rods correspond to and are connected to the metal filter screens in the filter screen unit one by one, and the open-hole ring sleeves the transmission part.

[0015] The present invention also provides a method for cleaning the metal filter bag. Based on the metal filter bag described above, the specific steps are as follows: Start the lifting mechanism. The lifting mechanism generates a vibration force, which is conducted to each metal filter screen through the transmission part, causing the metal filter screen to vibrate.

[0016] Optionally, it further includes the following steps: Start the lifting mechanism, drive the transmission part to rise, gradually fold the metal filter bag from the bag tail. After the metal filter bag is folded, the lifting mechanism provides a vibration force again. Then the lifting mechanism drives the transmission part to descend, and the metal filter bag unfolds and straightens.

[0017] The present invention also provides a dust collector, including a filter bag area. The filter bag area includes metal filter bags, and the metal filter bags are the metal filter bags described above.

[0018] Optionally, the transmission parts of the metal filter bags are connected to each other to form a frame structure, and a lifting mechanism is arranged at the upper end of the frame structure. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the metal filter bag provided by the embodiment of the present invention in a semi-folded state;

[0020] Figure 2 is a schematic structural diagram of the metal filter bag in the straightened state provided by the embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of the metal filter bag in the fully folded state provided by the embodiment of the present invention;

[0022] Figure 4 is a schematic top - view structural diagram of a filter mesh unit of the metal filter bag provided by the embodiment of the present invention;

[0023] Figure 5 is Figure 1 an enlarged structural diagram of the folding connection part in;

[0024] Figure 6 is Figure 1 an enlarged structural diagram of the bag tail part in;

[0025] Figure 7 is Figure 1 an enlarged structural diagram of the anti - sway frame part in;

[0026] Figure 8 is a schematic top - view structural diagram of the anti - sway frame of the metal filter bag provided by the embodiment of the present invention;

[0027] Figure 9 is Figure 1 an enlarged structural diagram of the bag head part in;

[0028] Figure 10 is a schematic structural diagram of the dust collector provided with the metal filter bag provided by the embodiment of the present invention;

[0029] Figure 11 is Figure 10 the top - view structural diagram of.

[0030] Figure 1-11 The reference numerals in are explained as follows:

[0031] 1 metal filter bag, 11 metal filter mesh, 12 folding connection part, 121 rubber layer, 122 sliding ring, 13 bag tail, 131 short pipe, 14 transmission part, 15 lifting mechanism, 16 anti - sway frame, 161 perforated circular ring, 162 fixed rod, 17 folding layer, 18 bag head, 2 inlet flue, 3 electric field area, 31 cathode plate, 32 anode plate, 4 outlet flue, 5 clean gas chamber, 6 ash hopper, 7 flower plate, 71 filter bag hole, 8 power supply. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Please refer toFigure 1-4 , Figure 1 is a schematic structural view of the metal filter bag in a semi-folded state provided by an embodiment of the present invention; Figure 2 is a schematic structural view of the metal filter bag in a straightened state provided by an embodiment of the present invention; Figure 3 is a schematic structural view of the metal filter bag in a fully folded state provided by an embodiment of the present invention; Figure 4 is a top view structural schematic of a filter mesh unit of the metal filter bag provided by an embodiment of the present invention.

[0034] This embodiment provides a metal filter bag 1, including a plate-shaped metal filter mesh 11 and a folding layer 17. The metal filter mesh 11 can be a metal fiber mesh, which can be made by stainless steel wire drawing, die casting, and sintering. Its thickness can be from 2 mm to 10 mm, and it can be designed according to the filtration performance, strength, stiffness, and the effect of vibration cleaning. The folding layer 17 is, for example, a mesh cloth folding layer and has a certain filtration performance.

[0035] A plurality of metal filter meshes 11 and folding layers 17 are alternately connected to form a cylindrical filter mesh unit. In this embodiment, as Figure 4 shown, the metal filter mesh 11 is a flat plate shape, and it is easy to keep the two butt-jointed filter mesh units sealed. Specifically, four square straight plate metal filter meshes 11 and four folding layers 17 are used to form the filter mesh unit. In practical applications, other numbers of metal filter meshes 11 and folding layers 17 can also be used to form the filter mesh unit, as long as the final filter mesh unit is cylindrical. For example, three square straight plate metal filter meshes 11 and three folding layers 17 are used to form a triangular cylindrical filter mesh unit, or two semi-circular or multiple arc-shaped metal filter meshes 11 and the corresponding number of folding layers 17 are used to form a cylindrical filter mesh unit.

[0036] The metal filter bag 1 further includes a folding connection part 12. A plurality of filter mesh units are connected in sequence along the length direction, that is, the extending direction of the metal filter bag 1. The two metal filter meshes 11 corresponding to two adjacent filter mesh units are connected by the folding connection part 12 and can rotate around the folding connection part 12 to be straightened or folded.

[0037] With the above structure, the metal filter meshes 11 connected by the folding connection part 12 rotate around the folding connection part 12 in opposite directions. In this way, multiple filter mesh units of the metal filter bag 1 can be folded. As Figure 3 shown, in the fully folded state, a plurality of metal filter meshes 11 are stacked together. The volume of the metal filter bag 1 is small and the metal filter meshes 11 are not easily squeezed and deformed, which is convenient for the transportation of the metal filter bag 1. When installing the metal filter bag 1, only need to lift the metal filter bag 1 in the fully folded state, and the metal filter meshes 11 rotate around the folding connection part 12 due to the action of gravity, and the whole metal filter bag 1 automatically straightens to the straightened state as Figure 2 shown, which is convenient for installation.

[0038] Among them, the folding layer 17 is made of a woven mesh filter material, which has a certain filtering effect. The folding layer 17 is connected to the metal filter mesh 11 by sintering or crimping. When the metal filter bag 1 is straightened, each metal filter mesh 11 is in a cylindrical structure, and the folding layer 17 is in a folded state, as Figure 4 shown. The folding layer 17 is folded into a V shape, and the metal filter meshes 11 connected by the folding layer 17 can be tightly attached together. When the metal filter bag 1 is folded, each metal filter mesh 11 is turned and unfolded circumferentially, and the folding layer 17 is correspondingly unfolded from the folded state to meet the deformation requirements of the metal filter bag 1, that is, the folding layer 17 is in a folded state when the metal filter bag 1 is unfolded, and the folding layer 17 is in an unfolded state when the metal filter bag 1 is folded.

[0039] As Figure 5 shown, Figure 5 is Figure 1 an enlarged structural schematic diagram of the folding connection part in

[0040] In this embodiment, the folding connection part 12 includes a sliding ring 122. The metal filter mesh 11 is provided with holes. The sliding ring 122 passes through the holes of two adjacent metal filter meshes 11 along the length direction and connects the two, and the metal filter mesh 11 can rotate around the sliding ring 122.

[0041] It should be noted that the holes of the metal filter mesh 11 are preferably slightly larger than the diameter of the sliding ring 122 to facilitate the tight folding of two adjacent metal filter meshes 11. Of course, the way the metal filter mesh 11 rotates through the folding connection part 12 is not limited to the sliding ring 122 structure in this embodiment, as long as two adjacent metal filter meshes 11 can rotate around the folding connection part 12 and fold, for example, two adjacent metal filter meshes 11 can also be connected by a hinge, and they rotate and fold through the hinge structure.

[0042] As Figure 5 shown, the folding connection part 12 further includes a rubber layer 121. The rubber layer 121 wraps the connection part of two adjacent metal filter meshes 11 and seals the connection part. At this time, the above-mentioned sliding ring 122 is also wrapped in the rubber layer 121. The rubber layer 121 seals the two connected metal filter meshes 11, and sealant can be applied at the connection part with the metal filter mesh 11 to prevent unfiltered gas from leaking through this part when the metal filter bag 1 is filtering. The rubber layer 121 has a certain flexibility. When two adjacent metal filter meshes 11 are folded, the rubber layer 121 will also deform accordingly and will not prevent the folding of the metal filter mesh 11. It can be understood that the rubber layer 121 can also be made of materials other than rubber, as long as it can seal two adjacent metal filter meshes 11 and does not prevent the folding of two adjacent metal filter meshes 11.

[0043] Please continue to refer to Figure 5, the rubber layer 121 is bent around the middle, and the bending direction is the same as the folding direction of two adjacent metal filters 11. Such a setting can define the folding direction of adjacent metal filters 11, facilitating the quick folding of the entire metal filter bag 1 along a predetermined direction into Figure 3 the state shown in the figure, preventing inconsistent folding directions of the metal filters 11 in the same filter element from affecting the folding process. In addition, the rubber layer 121 is bent around the middle, roughly in a V-shaped structure. During folding, the deformation of the rubber is smaller, which is more conducive to the quick progress of folding.

[0044] Similarly, the rubber layer 121 being bent around the middle is only the solution adopted in this embodiment. In practical applications, the folding direction of adjacent metal filters 11 can also be defined by other means. For example, partitions are provided on both the upper and lower sides of the sliding ring 122, enabling adjacent metal filters 11 to rotate only on one side of the sliding ring 122.

[0045] Please continue to refer to Figure 6 , Figure 6 which Figure 1 is an enlarged structural schematic diagram of the tail part of the middle bag.

[0046] In this embodiment, the metal filter bag 1 further includes a bag tail 13, which is arranged at the end of the metal filter bag 1. The bag tail 13 is fixedly connected to the metal filter 11 at the end of the metal filter bag 1. The above-mentioned multiple filter elements connected in the length direction form a cylindrical structure with openings at both ends. Here, the bag tail 13 is a cylindrical structure with one end closed, and is fixedly connected to several metal filters 11 of the end filter element to seal the opening of the cylindrical structure. At this time, as Figure 6 shown in the figure, for the convenience of connecting with the bag tail 13, the metal filter 11 of the end filter element is fixed to the bag tail 13, so that the metal filter 11 of the filter element connected to the bag tail 13 will not fold along with the folding of the metal filter bag 1. It can be understood that it is also possible to connect the metal filter 11 and the bag tail 13 in a foldable manner.

[0047] Furthermore, the metal filter bag 1 in this embodiment further includes a transmission part 14 and a lifting mechanism 15. Specifically, as Figure 1 shown in the figure, the transmission part 14 is specifically a rod part. One end of the transmission part 14 is fixedly connected to the bag tail 13, and the other end is fixedly connected to the lifting mechanism 15. The lifting mechanism 15 can lift the transmission part 14, causing the metal filter bag 1 to be gradually folded from the bag tail 13.

[0048] Among them, the present invention does not limit the connection manner between the transmission part 14 and the bag tail 13 and the lifting mechanism 15. Thread connection, welding or interference fit can be adopted, etc. The transmission part 14 can also be a pull rope, a chain link, etc., and then the bag tail 13 can be connected by tying, hooking, etc. The rod structure helps to straighten the metal filter bag 1. When structures such as a pull rope or a chain link are used as the transmission part 14, the metal filter bag 1 can be straightened under the action of gravity. Therefore, it is a preferred solution to set the transmission part 14 as a rod part. However, obviously, as long as the transmission part 14 can lift the bag tail 13 under the drive of the lifting mechanism 15 to gradually fold the metal filter bag 1.

[0049] In this embodiment, the transmission part 14 is a rod part and is thread-connected to the bag tail 13. A short tube 131 is provided at the center of the bag tail 13, and the short tube 131 is provided with internal threads. The connection end of the transmission part 14 is provided with corresponding external threads, and the transmission part 14 can be thread-connected to the short tube 131. Of course, a short rod with external threads can also be provided at the center of the bag tail 13, and a threaded hole with corresponding internal threads can be provided at the connection end of the transmission part 14 and the bag tail 13, so that the transmission part 14 and the short rod are thread-connected.

[0050] Please refer to Figure 7 、 8 , Figure 7 is Figure 1 the enlarged structural schematic diagram of the anti-sway frame part in Figure 8 the top view structural schematic diagram of the metal filter bag anti-sway frame provided by the embodiment of the present invention.

[0051] In this embodiment, the metal filter bag 1 further includes an anti-sway frame 16. The anti-sway frame 16 includes an open-hole circular ring 161 and a plurality of fixed rods 162 connected to the open-hole circular ring 161. The fixed rods 162 correspond to and are connected to each metal filter screen 11 in the filter screen unit one by one. When setting the transmission part 14, both the transmission part 14 and the open-hole circular ring 161 are correspondingly arranged in the middle, so the open-hole circular ring 161 can be sleeved on the transmission part 14.

[0052] The anti-sway frame 16 is used to prevent the metal filter bag 1 from swaying caused by being blown by the flue gas during the filtration process. In addition, the anti-sway frame 16 is sleeved on the transmission part 14. When the metal filter bag 1 is folded, the anti-sway frame 16 does not interfere with the folding operation, and the anti-sway frame 16 can move up and down along with the folding action. As Figure 3 shown, the fixed rod 162 can be fixed to the middle of the metal filter screen 11. At this time, the metal filter screen 11 connected to the fixed rod 162 in the anti-sway frame 16 will not be folded accordingly.

[0053] In this embodiment, a plurality of anti-sway frames 16 can be set, and the plurality of anti-sway frames 16 are arranged at intervals of several filter screen units. As Figure 3As shown, three anti-sway frames 16 are arranged at intervals inside a metal filter bag 1, and in actual applications, the number and intervals of the anti-sway frames 16 can be adjusted according to the flow rate of the flue gas, etc., to ensure that the metal filter bag 1 does not swing.

[0054] It can be understood that the structure of the above anti-sway frame 16 is only the structure selected in this embodiment. In actual applications, other structures can also be adopted, as long as the metal filter bag 1 can be prevented from swinging. For example, a fixing ring is arranged along the inner circumference of the filter mesh unit. The inner side of the fixing ring is also slidably connected to the transmission part 14 through the fixing rod 162 and the perforated ring 161. The fixing ring does not need to be fixedly connected to each metal filter mesh 11, and it can also prevent the metal filter bag 1 from swinging.

[0055] Please refer to Figure 9 , Figure 9 is Figure 1 the enlarged structural schematic diagram of the bag head part in

[0056] This embodiment further includes a bag head 18. The bag head 18 is arranged at the top end of the metal filter bag 1, and the bag head 18 is used to fix the metal filter bag 1 to the dust removal equipment.

[0057] This embodiment also provides a method for cleaning the metal filter bag. The metal filter bag 1 is the metal filter bag 1 described above. In addition, the above lifting mechanism 15 also has a vibration function, that is, the lifting mechanism 15 is provided with a vibration driving part. Of course, a separate vibration driving part can also be provided, and the vibration force is transmitted through the transmission part 14. At this time, the transmission part 14 is a rigid rod part, and the transmission of the vibration force can be realized. The specific steps are as follows:

[0058] Start the lifting mechanism 15. The lifting mechanism 15 generates a vibration force, which is conducted to each metal filter mesh 11 through the transmission part 14, so that each metal filter mesh 11 generates high-frequency vibration, and the dust attached to the metal filter mesh 11 falls off.

[0059] If the dust on the metal filter mesh 11 cakes, or the dust adheres relatively firmly, and the dust cannot be completely removed only by high-frequency vibration, the following steps can be adopted for further dust cleaning:

[0060] Start the lifting mechanism 15. The lifting mechanism 15 drives the transmission part 14 to rise, so that the metal filter bag 1 is gradually folded from the bag tail 13 position. After the metal filter bag 1 is folded, the lifting mechanism 15 provides a vibration force again. The vibration force is conducted to the folded metal filter mesh 11 through the transmission part 14, and the adjacent metal filter meshes 11 collide with each other. The caked dust on the metal filter mesh 11 becomes loose, and the relatively firmly attached dust also becomes loose. Then the lifting mechanism 15 drives the transmission part 14 to descend, so that the metal filter bag 1 is straightened, and the loose dust will fall off.

[0061] If the dust still cannot be removed by the above steps, the above steps can be repeated several times until the dust on the metal filter screen 11 is completely removed.

[0062] Please refer to Figure 10-11 , Figure 10 which is a schematic structural diagram of a dust collector provided with a metal filter bag according to an embodiment of the present invention; Figure 11 is Figure 10 top view structural diagram of

[0063] An embodiment of the present invention further provides a dust collector, as Figure 10 and Figure 11 shown, including an inlet flue 2, an electric field area 3, a filter bag area, an outlet flue 4, a clean gas chamber 5, a hopper 6 and a power supply 8. The electric field area 3 includes a cathode plate 31 and an anode plate 32. The dust-containing flue gas enters the dust collector from the inlet flue 2. When entering the electric field area 3, the power supply 8 provides high-voltage negative electricity for the cathode plate 31, and the dust-containing flue gas is ionized into positive and negative electrons. The anode plate 32 is grounded. Most of the dust will be adsorbed and trapped by the anode plate 32 after being charged by negative electrons. The anode plate 32 is vibrated and cleaned by a vibrating device, and the dust falls into the lower hopper.

[0064] In this embodiment, the filter bag area includes a plurality of metal filter bags 1, and the metal filter bag 1 is the metal filter bag 1 described above. Since the metal filter bag 1 already has the above technical effects, the dust collector including the metal filter bag 1 should also have the same technical effects, so it will not be elaborated here.

[0065] This embodiment further includes a perforated plate 7. The perforated plate 7 is provided with a plurality of filter bag holes 71, and the filter bag holes 71 are evenly distributed on the perforated plate 7. Each filter bag hole 71 is correspondingly installed with a metal filter bag 1. The bag head 18 of the metal filter bag 1 is fixedly connected to the filter bag hole 71, and a sealing glue is applied at the connection between the bag head 18 and the filter bag hole 71 to keep the metal filter bag 1 and the perforated plate 7 sealed, so that the flue gas will not enter the clean gas chamber 5 from the connection between the bag head 18 and the filter bag hole 71.

[0066] Figure 10 and Figure 11 The arrow direction in shows the flow direction of the dust-containing flue gas. Among the flue dust passing through the electric field area 3, there will still be a small amount of dust. After being filtered by the metal filter bag 1, the dust filtered by the metal filter bag 1 falls into the lower hopper 6 after being cleaned, and the clean flue gas enters the clean gas chamber 5 and then is discharged from the dust collector through the outlet flue 4.

[0067] In the dust collector, the transmission parts 14 of the metal filter bags 1 can be connected to each other to form a frame structure, and one or more lifting mechanisms 15 are arranged at the upper end of the frame structure. With such an arrangement, the folding, straightening and cleaning of the metal filter bags 1 can be completed by one or more lifting mechanisms 15, which can reduce the number of lifting mechanisms 15 and reduce the cost of the dust collector.

[0068] Among them, the transmission part 14 can be connected above the ceiling 7, or can be connected inside the clean gas chamber 5, or can be connected above the upper part of the clean gas chamber 5. Of course, the transmission part 14 may not form a frame structure, and a lifting mechanism 15 is provided above the transmission part 14 of each metal filter bag 1. This setting method is convenient for the maintenance and replacement of the damaged metal filter bag 1. In the case where only one metal filter bag 1 is damaged, only the lifting mechanism 15 of the metal filter bag 1 is started, and the metal filter bag 1 is folded and pulled out of the filter bag hole 71.

[0069] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A metal filter bag, characterized in that: it includes a metal filter screen (11) and a folding layer (17), and a plurality of the metal filter screens (11) and the folding layer (17) are alternately connected to form a cylindrical filter screen unit; the metal filter bag (1) further includes a folding connection part (12), and a plurality of the filter screen units are connected in sequence along the length direction, and two adjacent metal filter screens (11) corresponding to two adjacent filter screen units are connected by the folding connection part (12) and can rotate around the folding connection part (12) to be straightened or folded; it further includes a bag tail (13) and / or a bag head (18), the bag tail (13) is arranged at the end of the metal filter bag (1), and the bag head (18) is arranged at the top of the metal filter bag (1); it further includes a transmission part (14) and a lifting mechanism (15), one end of the transmission part (14) is fixedly connected to the bag tail (13), and the other end is fixedly connected to the lifting mechanism (15), and the lifting mechanism (15) can lift the transmission part (14) to drive the metal filter bag (1) to be gradually folded from the bag tail (13).

2. The metal filter bag according to claim 1, characterized in that: the folding connection part (12) includes a rubber layer (121), the rubber layer (121) covers the connection part of two adjacent metal filter screens (11), and the rubber layer (121) seals the connection part.

3. The metal filter bag according to claim 2, characterized in that: the folding connection part (12) further includes a sliding ring (122), the metal filter screen (11) is provided with holes, the sliding ring (122) passes through the holes of two adjacent metal filter screens (11) along the length direction and connects the two, and the metal filter screen (11) can rotate around the sliding ring (122); the sliding ring (122) is located in the rubber layer (121).

4. The metal filter bag according to claim 3, characterized in that: the rubber layer (121) is bent around the middle, and the bending direction is the same as the folding direction of two adjacent metal filter screens (11).

5. The metal filter bag according to claim 1, characterized in that: the lifting mechanism (15) is simultaneously provided with a vibration driving part, and the vibration force is transmitted through the transmission part (14).

6. The metal filter bag according to claim 5, characterized in that: it further includes an anti-swing frame (16), the anti-swing frame (16) includes an open-hole ring (161) and a plurality of fixing rods (162) connected to the open-hole ring (161), and the plurality of fixing rods (162) correspond to and are connected to the metal filter screens (11) in the filter screen unit one by one, and the open-hole ring (161) sleeves the transmission part (14).

7. The dust cleaning method of the metal filter bag, based on the metal filter bag (1) according to claim 5, characterized in that: the specific steps are as follows: start the lifting mechanism (15), the lifting mechanism (15) generates a vibrating force, which is conducted to each metal filter screen (11) through the transmission part (14) to make the metal filter screen (11) vibrate.

8. The dust cleaning method of the metal filter bag according to claim 7, characterized in that: it further comprises the following steps: starting the lifting mechanism (15), driving the transmission part (14) to rise, gradually folding the metal filter bag (1) from the bag tail (13), after the metal filter bag (1) is folded, the lifting mechanism (15) provides a vibration force again, and then the lifting mechanism (15) drives the transmission part (14) to descend, and the metal filter bag (1) unfolds and straightens.

9. A dust collector, comprising a filter bag area, characterized in that: the filter bag area comprises a metal filter bag (1), and the metal filter bag (1) is the metal filter bag (1) according to any one of claims 1-6.

10. A dust collector, comprising a filter bag area, characterized in that: the filter bag area comprises a metal filter bag (1), the metal filter bag (1) is the metal filter bag (1) according to any one of claims 1-6, the transmission parts (14) of the metal filter bags (1) are connected to each other to form a frame structure, and a lifting mechanism (15) is arranged at the upper end of the frame structure.

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