A bag filter for a dedusting system

Abstract

A kind of cloth bag dust collector for dust removal system, including dust collector box and filter dust cylinder.The outer side of the dust collector box is provided with the air guide cylinder that can rotate one-way around the axis of the filter dust cylinder corresponding to each described filter dust cylinder, air guide window is opened on the side surface wall of the air guide cylinder, the exhaust gas in the dust collector box can be guided to the filter dust cylinder surface by the air guide window that is moved in the circumferential side of the filter dust cylinder, exhaust gas is evenly passed through the filter dust cylinder from multiple directions of the circumferential side of the filter dust cylinder, the surface area of filter dust cylinder evenly undertakes filtering task, can avoid the problem that filter dust cylinder is not uniform with exhaust gas contact caused by one side air inlet, can prolong the cleaning cycle and service life of filter dust cylinder.

Description

Technical Field

[0001] This invention belongs to the technical field of baghouse dust collectors, specifically referring to a baghouse dust collector used in a dust removal system. Background Technology

[0002] Baghouse dust collectors are widely used in dust removal systems in many industrial fields such as steel, cement, chemical, power, and coal. They are key equipment to ensure a clean production environment and meet air quality standards. Baghouse dust collectors can not only effectively reduce industrial emissions and pollution to the environment, complying with strict environmental regulations and standards, but also improve the efficiency of industrial production processes, reduce equipment wear and failures caused by dust, and thus extend the service life of equipment. Baghouse dust collectors mainly rely on the fiber structure of the filter bags to filter the air, intercepting dust on the surface of the bags, thereby releasing clean air.

[0003] The filter bags inside a baghouse dust collector are usually arranged in a matrix structure, while the air inlet of the dust collector is located on one side. One-sided air inlet will lead to uneven distribution of airflow inside the dust collector. The filter bags closer to the air inlet may be subjected to higher airflow impact. At the same time, the dust on the air inlet side will adhere and accumulate faster, which will shorten the dust removal cycle of the filter bags. All of these factors will accelerate the wear of the filter bags and shorten their service life. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention creatively adopts a bag filter for a dust removal system to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted is as follows: This invention proposes a bag filter for a dust removal system, comprising:

[0006] The dust collector housing has a dust collection hopper at the bottom and an exhaust box at the top.

[0007] An air inlet pipe is installed on the side of the dust collector housing and can deliver exhaust gas into the dust collector housing.

[0008] Multiple dust filter cartridges are provided, each with an opening at one end. The multiple dust filter cartridges are evenly arranged inside the dust collector housing, with the opening ends of the dust filter cartridges facing the exhaust box.

[0009] A compressed air tank is disposed on the side of the exhaust box, with the output end of the compressed air tank facing the opening end of the dust filter cartridge;

[0010] The dust collector housing has an air guide duct that can rotate unidirectionally around the axis of each dust filter cartridge on its outer side. The side wall of the air guide duct has an air guide window. The exhaust gas in the dust collector housing can be guided to the surface of the dust filter cartridge through the air guide window that moves around the dust filter cartridge, so that the exhaust gas passes through the dust filter cartridge evenly from multiple directions around the dust filter cartridge.

[0011] Furthermore, the air guide duct includes a cylinder body and cylinder seats fixed at the upper and lower ends of the cylinder body. The cylinder seats are rotatably installed at the bottom of the exhaust box, allowing the cylinder body to rotate outside the cylinder seats. Multiple blades are fixedly arranged between the two cylinder seats in a centrally symmetrical distribution around the axis, allowing the cylinder body to rotate under the blowing of airflow. The air guide window is provided on the cylinder body.

[0012] Furthermore, the length of the air guide window is equal to the length of the cylinder, and the arc length of the air guide window is set to 1 / 3π-2 / 3π. A window body is elastically hinged on the cylinder body corresponding to the air guide window. The arc length of the window body is equal to the arc length of the air guide window. The window body is constructed as an arc-shaped plate, and the two ends of the arc-shaped plate include a hinged end connected to the cylinder body and a movable end at the other end.

[0013] The window includes a first position that completely seals the air guide window and a second position where the movable end contacts the outer wall of the dust filter. When exhaust gas is introduced into the air inlet pipe, the window moves from the first position to the second position under the impact of the airflow. When there is no airflow outside the window, the window moves from the second position to the first position under the action of elastic restoring force.

[0014] Furthermore, the dust collector housing is equipped with an air distribution box, which includes multiple sets of air distribution grooves arranged parallel to each other along the width of the air outlet of the air inlet pipe. Each air distribution groove has a cell on the outside of each air guide duct along its length. The air distribution groove has an air distribution channel for the flow of exhaust gas. An air inlet groove is provided on the cell corresponding to the air distribution channel, so that the exhaust gas in the air distribution channel enters the cell through the air inlet groove.

[0015] Furthermore, the height of the air distribution groove is equal to the height of the cell and the height of the air guide tube. The bottom of the air guide tube is rotatably installed on the bottom inner wall of the cell. The bottom of the cell has a slot of the same size corresponding to the inner wall of the air guide tube, so that the interior of the air guide tube is connected to the interior space of the dust collector housing.

[0016] Furthermore, the output end of the compressed air tank is fixedly provided with a main air pipe, and the main air pipe is provided with multiple branch air pipes extending into the interior of the exhaust box. The number of branch air pipes corresponds to the number of air distribution slots. Each branch air pipe has an air nozzle on its surface wall corresponding to the opening of the dust filter. Each connection between the main air pipe and each branch air pipe is provided with a solenoid valve. The solenoid valve is connected to an external control circuit to control whether each solenoid valve is connected to the branch air pipe.

[0017] Furthermore, the intake pipe includes a first channel pipe and a second channel pipe arranged sequentially along the exhaust gas flow direction. The exhaust port of the first channel pipe is connected to the inlet of the second channel pipe. The first channel pipe includes a first air distribution pipe, a transverse diffuser pipe, and a second air distribution pipe arranged sequentially along the exhaust gas flow direction. The transverse diffuser pipe is used to uniformly diffuse the airflow in the first air distribution pipe into the second air distribution pipe in a transverse direction. The second channel pipe includes a third air distribution pipe, a longitudinal diffuser pipe, and a fourth air distribution pipe arranged sequentially along the exhaust gas flow direction. The longitudinal diffuser pipe is used to uniformly diffuse the airflow in the third air distribution pipe into the fourth air distribution pipe in a longitudinal direction.

[0018] Furthermore, the first channel tube is provided with multiple transverse guide plates. The multiple transverse guide plates are continuously or intermittently distributed in the first channel tube along the direction of exhaust gas flow, and the multiple transverse guide plates form a transverse airflow channel with the same number as the transversely arranged dust filter cartridges. This allows the single airflow at the inlet of the first channel tube to be guided by the transverse guide plates to form multiple airflows corresponding to the number and position of the transversely arranged dust filter cartridges.

[0019] Furthermore, the second channel tube is provided with multiple longitudinal guide plates, and the multiple longitudinal guide plates are continuously distributed in the first channel tube along the exhaust gas flow direction, and the single airflow in the transverse air distribution channel is evenly divided into multiple bundles along the longitudinal direction.

[0020] The second channel pipe is equipped with a baffle plate, which is disposed on one side of the plurality of longitudinal guide plates. The baffle plate separates the longitudinal air distribution channel, which is connected to the transverse air distribution channel, and the baffle plate is closed and insulated water channel. The outlet of the longitudinal air distribution channel is connected to the interior of the dust collector housing.

[0021] Furthermore, the second channel pipe also includes an insulation pipe, the input end of which is connected to an external insulation device. Multiple insulation water channels are connected through the insulation pipe. The insulation device can introduce liquid medium into the insulation water channel through the insulation pipe, so that the waste gas in the longitudinal air distribution channel can exchange heat with the liquid medium in the insulation water channel.

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

[0023] This invention features an air guide duct on the outside of the dust filter cartridge. When exhaust gas enters the dust collector housing from one side, it blows the air guide duct to rotate. Due to the pressure difference between the inside and outside of the dust filter cartridge, the exhaust gas is guided from multiple directions to the surface of the dust filter cartridge as the air guide duct rotates. This ensures that the surface area of ​​the dust filter cartridge evenly undertakes the filtration task, avoiding the problem of uneven contact between the dust filter cartridge and exhaust gas caused by unilateral air intake. This also extends the cleaning cycle and service life of the dust filter cartridge. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a bag filter for a dust removal system according to an embodiment of the present invention;

[0025] Figure 2 This is a side view of the internal structure of a bag filter for a dust removal system according to an embodiment of the present invention.

[0026] Figure 3 This is a top view of the internal structure of a bag filter dust collector for a dust removal system according to an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the internal structure of the intake pipe is provided for an embodiment of the present invention;

[0028] Figure 5 A partially enlarged structural schematic diagram of the air guide duct and air distribution box is provided for an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of a cell proposed in an embodiment of the present invention.

[0030] Among them, 10 is the dust collector housing; 11 is the dust collection hopper; 110 is the dust discharge channel; 111 is the plate valve; 112 is the valve plate; 12 is the exhaust box; 120 is the air chamber; 121 is the exhaust pipe; 20 is the air inlet pipe; 21 is the first channel pipe; 211 is the first air distribution pipe; 210 is the transverse air distribution channel; 212 is the transverse diffuser pipe; 213 is the second air distribution pipe; 214 is the transverse guide plate; 22 is the second channel pipe; 2201 is the longitudinal air distribution channel; 2202 is the heat-insulating water channel; 221 is the third air distribution pipe; 222 is the second channel pipe. Longitudinal diffuser; 223, fourth air distribution pipe; 224, longitudinal guide plate; 225, baffle; 23, insulation pipe; 30, dust filter cartridge; 31, filter bag; 32, frame; 40, compressed air tank; 41, main air pipe; 411, solenoid valve; 42, branch air pipe; 50, air guide tube; 500, air guide cavity; 501, air guide window; 51, cylinder body; 52, window body; 53, cylinder base; 54, blade; 60, air distribution box; 61, air distribution groove; 610, air distribution channel; 62, unit cell; 620, air inlet groove.

[0031] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0033] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0034] This invention provides a bag filter for a dust removal system, which aims to solve the problem of uneven distribution of exhaust gas at the air inlet. The device mainly includes a dust collector housing 10, an air inlet pipe 20, a dust filter cartridge 30, and a compressed air tank 40.

[0035] like Figure 1 and Figure 2 As shown, the dust collector housing 10 is constructed as a hollow rectangular housing. The air inlet pipe 20 is located on the side of the dust collector housing 10 and can transport exhaust gas into the dust collector housing 10. Multiple dust filter cartridges 30 are configured to have an opening at one end and are evenly arranged inside the dust collector housing 10.

[0036] Furthermore, the bottom of the dust collector housing 10 is provided with an inverted conical dust collection hopper 11, and the top of the dust collector housing 10 is provided with an exhaust box 12, with the opening end of the dust filter cylinder 30 facing the exhaust box 12. When the dust collector is working, the exhaust gas enters the interior of the dust collector housing 10 through the inlet pipe 20. When passing through the dust filter cylinder 30, the solid particles in the exhaust gas are blocked on the surface of the dust filter cylinder 30. Under the action of the induced draft fan, the filtered gas enters the air chamber 120 of the exhaust box 12 from the interior of the dust filter cylinder 30 and is discharged from the exhaust pipe 121 on the exhaust box 12. The solid particles blocked on the surface of the dust filter cylinder 30 will partially fall into the dust collection hopper 11 at the bottom of the dust collector housing 10.

[0037] As dust removal continues, the amount of particulate matter accumulating on the surface of the dust filter 30 gradually increases, increasing the pressure difference between the two sides of the dust filter 30 and affecting the normal operation of the dust collector. At this time, it is necessary to shake off the dust on the surface of the dust filter 30. Therefore, a compressed air tank 40 is installed on the side of the exhaust box 12, and the output end of the compressed air tank 40 faces the opening end of the dust filter 30, which can spray high-pressure gas into the dust filter 30, causing the particulate dust attached to the surface of the dust filter 30 to fall into the dust collection hopper 11. A closable valve plate 112 is installed at the bottom of the dust collection hopper 11. The valve plate 112 is controlled to open and close by a plate valve 111. When the dust inside the dust collection hopper 11 accumulates to a certain amount, the plate valve 111 controls the valve plate 112 to open, and the dust inside is discharged from the dust discharge channel 110.

[0038] Since the air inlet pipe 20 is located on one side of the dust collector housing 10, the exhaust gas in the air inlet pipe 20 enters the dust collector housing 10 in one direction. When it comes into contact with the dust filter cartridge 30 inside, there are areas with more contact and areas with less contact. This situation results in an uneven distribution of the amount of dust filtered by the filtration area on the surface of the dust filter cartridge 30, which inevitably leads to inconsistent dust accumulation on the surface of the dust filter cartridge 30. Therefore, it affects the filtration effect, cleaning cycle and service life of the dust filter cartridge 30.

[0039] Therefore, in order to ensure that the exhaust gas contacts the surface of the dust filter cartridge 30 evenly, thereby improving the filtration efficiency of the dust filter cartridge 30 and extending the cleaning cycle and service life, such as... Figure 4 and Figure 5 As shown, each dust collector housing 10 has an air guide duct 50 that can rotate unidirectionally around the axis of the dust collector 30 on the outer side. The side wall of the air guide duct 50 has an air guide window 501. The exhaust gas in the dust collector housing 10 can be guided to the surface of the dust collector 30 through the air guide window 501 that moves around the dust collector 30, so that the exhaust gas passes through the dust collector 30 evenly from multiple directions around the dust collector 30.

[0040] Thus, when the exhaust gas entering the dust collector housing 10 from one side passes through the air guide duct 50 outside the dust filter 30, it can cause the air guide duct 50 to rotate in one direction. Due to the pressure difference between the inner and outer sides of the dust filter 30, during the rotation of the air guide duct 50, the exhaust gas follows the position of the air guide window 501 and is guided from multiple directions to the surface of the dust filter 30, so that the surface area of ​​the dust filter 30 can evenly undertake the filtration task, which can avoid the problem of uneven contact between the dust filter 30 and the exhaust gas caused by unilateral air intake.

[0041] In some embodiments, the air guide duct 50 includes a cylinder 51 and cylinder seats 53 fixed to the upper and lower ends of the cylinder 51. The cylinder seats 53 are rotatably mounted on the bottom of the exhaust box 12, so that the cylinder 51 can rotate to the outside of the cylinder seats 53. A plurality of blades 54 are fixedly provided between the two cylinder seats 53 in a centrally symmetrical distribution around the axis, so that the cylinder 51 can rotate under the blowing of the airflow. The air guide window 501 is provided on the cylinder 51.

[0042] The diameter of the cylinder 51 is more than twice the diameter of the dust filter cylinder 30. The presence of the cylinder 51 does not affect the dust cleaning process of the dust filter cylinder 30. To reduce the frictional resistance of the rotation of the air guide duct 50, a bearing is installed at the connection between the cylinder base 53 and the exhaust box 12. Figure 5 As shown, multiple blades 54 are centrally symmetrically distributed around the axis of the dust filter 30. Optionally, the blades 54 can be configured as straight or spiral, so that when the airflow on one side blows the blades 54, the air guide 50 can always rotate, so that the position of the air guide window 501 is always changing around the axis.

[0043] Furthermore, in order to maximize the contact area between the exhaust gas and the dust filter 30 in the height direction, the length of the air guide window 501 is equal to the length of the cylinder 51 and equal to the height of the dust filter 30, wherein the arc length of the air guide window 501 can be set to less than π.

[0044] During backflushing cleaning of the dust filter cartridge 30, dust that falls off its surface may re-mix into the exhaust gas or diffuse to the surface of adjacent dust filter cartridges 30 being cleaned. To reduce the impact of diffused dust on other dust filter cartridges 30 during backflushing cleaning, such as... Figure 4 and Figure 5 As shown, a window 52 is elastically hinged to the cylinder 51 at the location corresponding to the air guide window 501. The arc length of the window 52 is equal to the arc length of the air guide window 501. The window 52 is constructed as an arc-shaped plate, with a hinged end connected to the cylinder 51 and a movable end at the other end. In some embodiments, a torsion spring is used to connect the window 52 and the cylinder 51, so that the window 52 has an elastic restoring force to close the air guide window 501. The arc length of the air guide window 501 is preferably set to 1 / 3π-2 / 3π, so that the size of the window 52 is relatively smaller and easier to open and close.

[0045] The window 52 includes a first position where the air guide window 501 is completely closed and a second position where the movable end contacts the outer wall of the dust filter 30. When exhaust gas is introduced into the air inlet pipe 20, the window 52 moves from the first position to the second position under the action of airflow impact and pressure difference inside and outside the dust filter 30, and is in an open state. The movable end of the window 52 contacts the outer wall of the dust filter 30. When the cylinder 51 continues to rotate under the action of airflow, the movable end of the window 52 in contact with the outer wall of the dust filter 30 will also scrape the surface of the dust filter 30, removing some of the dust attached to the surface of the dust filter 30. In this way, the cleaning cycle of the dust filter 30 can be extended.

[0046] Furthermore, in some embodiments, the dust filter cartridge 30 includes a filter bag 31 and a frame 32 disposed inside the filter bag 31 to provide support. In order to reduce the damage to the filter bag 31 when the window 52 is scraped, the part of the window 52 that contacts the filter bag 31 can be provided with felt or a brush to reduce the damage to the filter bag 31 while removing dust.

[0047] like Figure 5 As shown, when there is no airflow outside the window 52, ​​the window 52 moves from the second position to the first position under the action of the torsion spring. At this time, the dust filter 30 is filled with high-pressure gas. The high-pressure gas back-blowing causes the filter bag 31 to deform and shake off the dust adhering to the surface of the filter bag 31. At this time, the window 52 is in the closed state. The shaken dust will be discharged downward from the bottom of the air guide cavity 500 between the air guide duct 50 and the dust filter 30 to the dust collection hopper 11 for collection, so as to avoid the dust from spreading to the surrounding area, causing secondary adhesion or short-term increase in the dust content in the exhaust gas.

[0048] like Figure 2 , Figure 3 and Figure 4 As shown, the dust collector housing 10 is equipped with an air distribution box 60 inside. The air distribution box 60 includes multiple sets of air distribution grooves 61 arranged parallel to each other along the width of the air outlet of the air inlet pipe 20. Along the length of the air distribution grooves 61, a cell 62 is provided on the outside of each air guide duct 50. In this way, the air distribution grooves 61 can guide the exhaust gas from the outlet side of the air inlet pipe 20 into the multiple evenly distributed air distribution grooves 61. The exhaust gas entering the air distribution grooves 61 then enters the cell 62 corresponding to the number of dust filter cartridges 30, so that after the exhaust gas enters the dust collector housing 10, it is evenly distributed to a certain extent according to the arrangement of the dust filter cartridges 30.

[0049] Furthermore, the interior of the air distribution trough 61 has an air distribution channel 610 for the flow of exhaust gas. The cell 62 is provided with an air inlet slot 620 corresponding to the air distribution channel 610, so that the exhaust gas in the air distribution channel 610 enters the cell 62 through the air inlet slot 620. The exhaust gas entering the air distribution trough 61 from the outlet side of the air inlet pipe 20 will first fill the entire air distribution channel 610, and the exhaust gas in the air distribution channel 610 will then enter the interior of the cell 62 through the air inlet slot 620 on the cell 62.

[0050] The height of the air distribution groove 61 is equal to the height of the cell 62 and the height of the air guide duct 50. The bottom of the air guide duct 50 is rotatably installed on the bottom inner wall of the cell 62. The bottom of the cell 62 has a slot of the same size corresponding to the inner wall of the air guide duct 50, so that the interior of the air guide duct 50 is connected to the interior space of the dust collector housing 10. After the exhaust gas enters from the air inlet groove 620, it will be blown towards the blades 54 on the surface of the cylinder 51 at a fixed position and angle, so that the air guide duct 50 will always rotate when there is exhaust gas flow, so that the exhaust gas follows the position of the air guide window 501 and is guided from multiple directions to the surface of the dust filter 30, avoiding the problem of uneven contact between the dust filter 30 and the exhaust gas caused by unilateral air intake.

[0051] Furthermore, a main air pipe 41 is fixedly provided at the output end of the compressed air tank 40. Multiple branch air pipes 42 are provided on the main air pipe 41, extending into the exhaust box 12. The number of branch air pipes 42 corresponds to the number of air distribution grooves 61. Air nozzles are provided on the surface of the branch air pipes 42 corresponding to the openings of the dust filter cylinder 30. Solenoid valves 411 are provided at the connection between the main air pipe 41 and each branch air pipe 42. The solenoid valves 411 are connected to an external control circuit to control whether each solenoid valve 411 is connected to the branch air pipe 42. When the dust collector performs backflushing, the corresponding solenoid valve 411 is opened as needed to transport the compressed gas in the compressed air tank 40 to the branch air pipes 42 through the main air pipe 41. Then, the compressed gas is sprayed into the dust filter cylinder 30 through the corresponding air nozzles installed on the branch air pipes 42 to perform backflushing dust removal on the dust filter cylinder 30.

[0052] Since the air inlet area of ​​the air inlet pipe 20 is relatively small, while the distribution range of the dust filter cartridges 30 inside the dust collector housing 10 is usually larger than the air inlet area of ​​the air inlet pipe 20, in order for the exhaust gas in the air inlet pipe 20 to diffuse toward the distribution position of the dust filter cartridges 30 before entering the dust collector housing 10.

[0053] like Figure 1 , Figure 2 and Figure 6 As shown, the intake pipe 20 includes a first channel pipe 21 and a second channel pipe 22 arranged sequentially along the exhaust gas flow direction. The exhaust port of the first channel pipe 21 is connected to the inlet of the second channel pipe 22.

[0054] The first channel pipe 21 includes a first gas distribution pipe 211, a transverse diffuser pipe 212 and a second gas distribution pipe 213 arranged sequentially along the direction of exhaust gas flow. The transverse diffuser pipe 212 is used to uniformly diffuse the airflow in the first gas distribution pipe 211 into the second gas distribution pipe 213 in a transverse direction.

[0055] In some embodiments, a plurality of transverse guide plates 214 are provided in the first channel pipe 21. The plurality of transverse guide plates 214 are continuously or intermittently distributed in the first channel pipe 21 along the exhaust gas flow direction, and a transverse air distribution channel 210 is formed between the plurality of transverse guide plates 214, which is consistent with the number of transversely arranged dust filter cartridges 30. This allows the single airflow at the inlet of the first channel pipe 21 to be guided by the transverse guide plates 214 to form multiple airflows corresponding to the number and position of the transversely arranged dust filter cartridges 30. The number of transverse guide plates 214 in the first air distribution pipe 211 is less than or equal to the number of transversely arranged dust filter cartridges 30, while the number of transverse guide plates 214 in the transverse diffuser pipe 212 and the second air distribution pipe 213 is equal to the number of transversely arranged dust filter cartridges 30, so as to uniformly diffuse the airflow in the first air distribution pipe 211 into the second air distribution pipe 213 through the transverse diffuser pipe 212.

[0056] Furthermore, the second channel pipe 22 includes a third gas distribution pipe 221, a longitudinal diffuser pipe 222 and a fourth gas distribution pipe 223 arranged sequentially along the exhaust gas flow direction. The longitudinal diffuser pipe 222 is used to uniformly diffuse the airflow in the third gas distribution pipe 221 into the fourth gas distribution pipe 223 along the longitudinal direction.

[0057] In some embodiments, the second channel pipe 22 is provided with a plurality of longitudinal guide plates 224. The plurality of longitudinal guide plates 224 are continuously distributed in the first channel pipe 21 along the exhaust gas flow direction, and divide the single bundle of airflow in the transverse air distribution channel 210 into multiple bundles in the longitudinal direction. Each bundle of airflow in the transverse air distribution channel 210 is further divided into multiple bundles in the longitudinal direction, so that the exhaust gas flow can also be evenly diffused in the height direction of the dust filter 30.

[0058] like Figure 3 and Figure 6 As shown, the second channel pipe 22 is provided with a baffle 225, which is disposed on one side of a plurality of longitudinal guide plates 224. The second channel pipe 22 is divided into a longitudinal air distribution channel 2201 that communicates with the transverse air distribution channel 210 and a closed heat-insulating water channel 2202. The outlet of the longitudinal air distribution channel 2201 is connected to the interior of the dust collector housing 10. In some embodiments, the outlet of the longitudinal air distribution channel 2201 is connected to the air inlet of the air distribution groove 61, so as to guide the exhaust gas flow evenly to a plurality of parallel air distribution grooves 61, and the airflow entering the air distribution groove 61 is also evenly distributed in the height direction of the dust filter cartridge 30.

[0059] Furthermore, the second channel pipe 22 also includes an insulation pipe 23. The input end of the insulation pipe 23 is connected to an external insulation device. Multiple insulation water channels 2202 are connected through the insulation pipe 23. The insulation device can introduce liquid medium into the insulation water channel 2202 through the insulation pipe 23, so that the waste gas in the longitudinal air distribution channel 2201 and the liquid medium in the insulation water channel 2202 can exchange heat.

[0060] In some embodiments, the liquid medium introduced into the insulation water channel 2202 by the insulation device can be cooling water or warm water. Since the temperature of the exhaust gas also affects the dust removal effect of the dust collector, for example, when the exhaust gas temperature is high, the filter bag 31 may deform due to the high temperature, or even age faster, thereby affecting its air permeability and dust removal efficiency. At the same time, the material and structure of the filter bag 31 may become fragile at high temperatures and be more susceptible to wear and damage. Therefore, it is necessary to reduce the temperature of the exhaust gas. At this time, the temperature of the exhaust gas can be reduced by introducing cooling water into the insulation water channel 2202 through the insulation device. When the exhaust gas temperature is low, condensation may occur on the surface of the filter bag 31. After condensation, the dust layer on the surface of the filter bag 31 will become wet, causing dust to adhere to the filter bag 31, which will cause the filter bag 31 to become clogged, greatly reducing the filtration effect and making it difficult to clean. At this time, the temperature of the exhaust gas can be increased by introducing warm water into the insulation water channel 2202 through the insulation device, thereby preventing condensation on the surface of the filter bag 31.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A bag filter for a dust collection system, characterized in that, include: The dust collector housing (10) has a dust collection hopper (11) at the bottom and an exhaust box (12) at the top. An air inlet pipe (20) is provided on the side of the dust collector housing (10) and can deliver exhaust gas into the dust collector housing (10); Multiple dust filter cartridges (30) are configured to have an opening at one end. The multiple dust filter cartridges (30) are evenly arranged inside the dust collector housing (10), and the opening end of the dust filter cartridge (30) faces the exhaust box (12). A compressed air tank (40) is disposed on the side of the exhaust box (12), and the output end of the compressed air tank (40) faces the opening end of the dust filter (30); The dust collector housing (10) is provided with an air guide duct (50) that can rotate unidirectionally around the axis of the dust filter (30) on the outer side of each dust filter (30). An air guide window (501) is provided on the side wall of the air guide duct (50). The exhaust gas in the dust collector housing (10) can be guided to the surface of the dust filter (30) through the air guide window (501) that moves around the dust filter (30). The air guide duct (50) includes a cylinder (51), and the air guide window (501) is disposed on the cylinder (51). A window (52) is elastically hinged on the cylinder (51) corresponding to the air guide window (501). The window (52) opens under the impact of airflow to scrape off the dust on the surface of the dust filter cylinder (30). When there is no airflow, the window (52) closes under the elastic restoring force to prevent dust from spreading during backflushing.

2. The bag filter for a dust removal system according to claim 1, characterized in that: The air guide tube (50) includes the tube body (51) and the tube seat (53) fixed at the upper and lower ends of the tube body (51). The tube seat (53) is rotatably installed at the bottom of the exhaust box (12), so that the tube body (51) can rotate to the outside of the dust filter tube (30). A plurality of blades (54) are fixed between the two tube seats (53) and are centrally symmetrically distributed around the axis, so that the tube body (51) can rotate under the blowing of the airflow.

3. The bag filter for a dust removal system according to claim 2, characterized in that: The length of the air guide window (501) is equal to the length of the cylinder (51), the arc length of the air guide window (501) is set to 1 / 3π-2 / 3π, the arc length of the window (52) is equal to the arc length of the air guide window (501), the window (52) is constructed as an arc plate, and the two ends of the arc plate respectively include a hinge end connected to the cylinder (51) and a movable end at the other end; The window (52) includes a first position that completely seals the air guide window (501) and a second position where the movable end contacts the outer wall of the dust filter (30). When exhaust gas is introduced into the air inlet pipe (20), the window (52) moves from the first position to the second position under the impact of the airflow. When there is no airflow outside the window (52), the window (52) moves from the second position to the first position under the action of the elastic restoring force.

4. The bag filter for a dust removal system according to claim 1, characterized in that: The dust collector housing (10) is provided with an air distribution box (60) inside. The air distribution box (60) includes multiple sets of air distribution grooves (61) arranged parallel to each other along the width direction of the air outlet of the air inlet pipe (20). A cell (62) is provided on the outside of each air guide tube (50) along the length direction of the air distribution groove (61). The air distribution groove (61) has an air distribution channel (610) for the flow of exhaust gas inside. An air inlet groove (620) is provided on the cell (62) corresponding to the air distribution channel (610), so that the exhaust gas in the air distribution channel (610) enters the cell (62) through the air inlet groove (620).

5. The bag filter for a dust removal system according to claim 4, characterized in that: The height of the air distribution groove (61) is equal to the height of the cell (62) and the height of the air guide tube (50). The bottom of the air guide tube (50) is rotatably installed on the bottom inner wall of the cell (62). The bottom of the cell (62) is provided with a slot of the same size corresponding to the inner wall of the air guide tube (50), so that the interior of the air guide tube (50) is connected to the interior space of the dust collector box (10).

6. The bag filter for a dust removal system according to claim 4, characterized in that: The output end of the compressed air tank (40) is fixedly provided with a main air pipe (41). The main air pipe (41) is provided with a plurality of branch air pipes (42) extending into the interior of the exhaust box (12). The number of branch air pipes (42) corresponds to the number of air distribution grooves (61). Each branch air pipe (42) has a jet nozzle on its surface wall corresponding to the opening of the dust filter (30). Each connection between the main air pipe (41) and each branch air pipe (42) is provided with a solenoid valve (411). The solenoid valve (411) is connected to an external control circuit and is used to control whether each solenoid valve (411) is connected to the branch air pipe (42).

7. The bag filter for a dust removal system according to claim 1, characterized in that: The intake pipe (20) includes a first channel pipe (21) and a second channel pipe (22) arranged sequentially along the exhaust gas flow direction. The exhaust port of the first channel pipe (21) is connected to the inlet of the second channel pipe (22). The first channel pipe (21) includes a first air distribution pipe (211), a transverse diffuser pipe (212), and a second air distribution pipe (213) arranged sequentially along the exhaust gas flow direction. The transverse diffuser pipe (212) is used to uniformly diffuse the airflow in the first air distribution pipe (211) into the second air distribution pipe (213) in the transverse direction. The second channel pipe (22) includes a third air distribution pipe (221), a longitudinal diffuser pipe (222), and a fourth air distribution pipe (223) arranged sequentially along the exhaust gas flow direction. The longitudinal diffuser pipe (222) is used to uniformly diffuse the airflow in the third air distribution pipe (221) into the fourth air distribution pipe (223) in the longitudinal direction.

8. The bag filter for a dust removal system according to claim 7, characterized in that: The first channel pipe (21) is provided with multiple transverse guide plates (214). The multiple transverse guide plates (214) are continuously or intermittently distributed in the first channel pipe (21) along the direction of exhaust gas flow. The multiple transverse guide plates (214) form a transverse air distribution channel (210) with the same number of transversely arranged dust filter cylinders (30) as the transversely arranged. This allows the single airflow at the inlet of the first channel pipe (21) to be guided by the transverse guide plates (214) to form multiple airflows corresponding to the number and position of the transversely arranged dust filter cylinders (30).

9. The bag filter for a dust removal system according to claim 8, characterized in that: The second channel pipe (22) is provided with multiple longitudinal guide plates (224). The multiple longitudinal guide plates (224) are continuously distributed in the first channel pipe (21) along the exhaust gas flow direction, and divide the single airflow in the transverse air distribution channel (210) into multiple bundles along the longitudinal direction. The second channel pipe (22) is provided with a partition (225), which is arranged on one side of the multiple longitudinal guide plates (224). The partition (225) separates the longitudinal air distribution channel (2201) which communicates with the transverse air distribution channel (210) and the closed heat-insulating water channel (2202) in the second channel pipe (22). The outlet of the longitudinal air distribution channel (2201) is connected to the interior of the dust collector box (10).

10. The bag filter for a dust removal system according to claim 9, characterized in that: The second channel pipe (22) also includes a heat-insulating pipe (23). The input end of the heat-insulating pipe (23) is connected to an external heat-insulating device. Multiple heat-insulating water channels (2202) are connected through the heat-insulating pipe (23). The heat-insulating device can introduce liquid medium into the heat-insulating water channel (2202) through the heat-insulating pipe (23) so that the waste gas in the longitudinal air distribution channel (2201) and the liquid medium in the heat-insulating water channel (2202) can exchange heat.

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