A dust-laden gas filtration device with an annular airflow jet structure

Abstract

This invention provides a dust-laden gas filtration device with an annular airflow jetting structure, comprising: a filter having a first chamber and a second chamber, the first chamber having an air inlet and the second chamber having an air outlet; the filter including a filter unit, the dust-laden gas inlet being located in the first chamber and the clean gas outlet being located in the second chamber; a jetting system including: a first jetting device, the jetting nozzles corresponding to and spaced apart from the clean gas outlets of the filter unit; a second jetting device including an annular airflow jetting structure with an annular air outlet capable of forming an annular airflow around the outer periphery of the filter unit; and a pulse control device for controlling a pulse air source to jettison the inside and outside of the filter unit. By setting an annular nozzle on the filter unit, an annular jetting airflow is formed around the filter element during the jetting cleaning process, loosening the dust layer on the outside of the filter element, thereby improving the cleaning effect and regeneration efficiency of the filter element.

Description

Technical Field

[0001] This invention relates to the field of dust-laden gas filtration technology, and more specifically to a dust-laden gas filtration device with an annular airflow jet structure capable of cleaning filters. Background Technology

[0002] High-temperature dust-laden gases are commonly found in the petroleum, chemical, power, metallurgical, and other industries. Different processes require filtration and purification of these gases to achieve energy recovery and meet environmental emission standards. High-temperature dust-laden gas purification is a technology that directly filters solid particles from high-temperature gases under high-temperature conditions. During the filtration process, after the high-temperature dust-laden gas enters the filter, dust particles in the airflow are intercepted on the outer surface of the filter element, forming a filter cake layer. The gas then passes through the porous channels in the filter element into subsequent processes. The filtered gas is clean with a very low dust concentration.

[0003] As filtration continues, the powder cake layer on the outer surface of the filter element gradually thickens, leading to an increase in the pressure drop of the filter element. At this point, it is necessary to clean the outer wall of the filter element to regenerate its performance.

[0004] In existing technologies, backflushing is the primary method used to regenerate the performance of filter elements. The direction of the backflushing airflow is opposite to that of the filtering airflow. The high-pressure backflushing airflow enters the interior of the filter element instantaneously, and the transient energy generated peels off the powder cake layer attached to the surface of the filter element, so that the resistance of the filter element is basically restored to the initial state of filtration, thereby regenerating the performance of the filter element.

[0005] However, during long-term filtration and cleaning, dust gradually accumulates on the outer surface of the filter element and gradually connects between the filter elements, forming a dust bridging phenomenon, making the dust attached to the filter element more difficult to remove. Summary of the Invention

[0006] To address the problems in the prior art, embodiments of the present invention provide a dust-laden gas filtration device with an annular airflow jet structure, which can at least partially solve the problems existing in the prior art.

[0007] On one hand, the present invention proposes a dust-laden gas filtration system, comprising:

[0008] The filter has a first chamber and a second chamber. The first chamber has an air inlet and the second chamber has an air outlet. The filter includes a filter unit. The dust-laden gas inlet of the filter unit is located in the first chamber, and the clean gas outlet of the filter unit is located in the second chamber.

[0009] The jetting system includes:

[0010] The first jetting device has jetting nozzles that correspond to and are spaced apart from the clean gas outlets of the filter unit;

[0011] The second jetting device includes an annular airflow jetting structure, which has an annular air outlet that can form an annular airflow around the outer periphery of the filter unit.

[0012] A pulse control device is used to control the pulse air source to blow air into the inside and outside of the filter unit according to a preset pressure and cycle through a first blowing device or a second blowing device.

[0013] Furthermore, the filtration unit includes at least one filter tube, and the annular airflow jet structure is sleeved on the filter tube.

[0014] Furthermore, the annular airflow jet structure has a double-layered cylindrical shell, and the outer wall of the double-layered cylindrical shell is provided with at least one air inlet; the annular air outlet is opened at the first end of the annular airflow jet structure to form an annular airflow around the outer periphery of the filter unit.

[0015] Furthermore, the annular airflow jet structure also includes an annular guide plate, which is located between the outer wall and the inner wall of the double-layer cylindrical shell, and is fixedly disposed on the end wall of the first end of the annular airflow jet structure. The guide plate extends from the end wall to the second end of the annular airflow jet structure, and leaves an air gap between the guide plate and the second end. The airflow enters the interior of the annular airflow jet structure through the air inlet, and is discharged from the annular air outlet after passing through the air gap.

[0016] Furthermore, the filtration unit includes at least two filter tubes, and the annular airflow jet structure is sleeved on the filter tubes; the annular airflow jet structures are connected to each other through connecting pipes.

[0017] Furthermore, it also includes at least one concentrator disposed below the annular airflow jet structure, the concentrator being able to cause the annular airflow ejected from the annular outlet to converge toward the outer wall of the filter tube.

[0018] Furthermore, the combiner is a cylindrical structure whose inner diameter narrows from top to bottom, and is fitted onto at least a portion of the filter tube.

[0019] Furthermore, the combiner is divided sequentially along the axial direction into:

[0020] The first rectification section, which is close to the annular outlet of the annular airflow jet structure, has a large inner diameter and remains unchanged along the axial direction.

[0021] A second rectifier section, the inner diameter of which gradually narrows from top to bottom;

[0022] The third rectifier section has a small inner diameter and remains constant along the axial direction.

[0023] Furthermore, the inner wall of the first rectifier section of the combiner is provided with a guide vane to direct the annular airflow ejected from the annular outlet toward the outer wall of the filter tube.

[0024] Furthermore, the angle between the guide vane and the free end direction of the combiner is 30 degrees to 80 degrees.

[0025] Furthermore, the inner surface of the second rectifier section is curved.

[0026] On the other hand, embodiments of the present invention provide a method for cleaning dust using the above-described dust-laden gas filtration system, the method comprising:

[0027] Turn on the second jet cleaning device and use the annular airflow jet cleaning structure to clean the filter unit for a first preset time.

[0028] Turn off the second jetting device;

[0029] Turn on the first jet cleaning device and perform jet cleaning of the filter unit for a second preset time through the jet nozzle;

[0030] Shut down the first jetting device;

[0031] The second jet cleaning device is activated, and the filter unit is cleaned by jet cleaning for a third preset time through the annular airflow jet structure; and

[0032] Repeat the above steps until the dust residue on the filter unit is below the preset standard.

[0033] Furthermore, the blowing pressure of the second blowing device is 1 / 6 to 2 / 3 of the blowing pressure of the first blowing device.

[0034] The dust-laden gas filtration device with an annular airflow jet structure provided in this embodiment of the invention includes: a filter having a first chamber and a second chamber, the first chamber having an air inlet and the second chamber having an air outlet; the filter including a filter unit, the dust-laden gas inlet of the filter unit being located in the first chamber and the clean gas outlet of the filter unit being located in the second chamber; and a jet system including: a first jet device with its jet nozzle corresponding to and spaced apart from the clean gas outlet of the filter unit; a second jet device including an annular airflow jet structure with an annular air outlet capable of forming an annular airflow around the outer periphery of the filter unit; and a pulse control device for controlling a pulse air source to jet the filter unit's interior and exterior through the first or second jet device according to a preset pressure and cycle. By providing an annular nozzle on the filter unit, an annular jet airflow is formed around the filter element during the jet cleaning process, loosening / breaking the dust layer outside the filter element, thereby improving the cleaning effect and regeneration efficiency of the filter element. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0036] Figure 1 This is a schematic diagram of the structure of a dust-laden gas filtration device provided in an embodiment of the present invention.

[0037] Figure 2 This is a schematic diagram of an annular airflow jet structure provided in an embodiment of the present invention.

[0038] Figure 3 This is a schematic diagram of an annular airflow jet structure provided in an embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram of the structure of a combiner provided in an embodiment of the present invention.

[0040] Figure 5 This is a schematic flowchart illustrating a method for cleaning dust using a dust-laden gas filtration device according to an embodiment of the present invention.

[0041] Figure 6 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0043] Figure 1 This is a schematic diagram of the structure of a dust-laden gas filtration device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the dust-laden gas filtration system provided in this embodiment of the invention includes: a filter 10, which has a first chamber 11 and a second chamber 12. The first chamber 11 has an air inlet 13 and the second chamber 12 has an air outlet 14. The filter 10 includes a filter unit 15. The dust-laden gas inlet 151 of the filter unit 15 is disposed in the first chamber 11, and the clean gas outlet 152 of the filter unit 15 is disposed in the second chamber 12.

[0044] The blowing system 20 includes: a first blowing device, whose blowing nozzle 21 corresponds to and is spaced apart from the clean gas outlet 152 of the filter unit 15;

[0045] The second jetting device includes an annular airflow jetting structure 22, which has an annular air outlet 221. The annular air outlet 221 can form an annular airflow around the outer periphery of the filter unit 15.

[0046] The pulse control device 23 is used to control the pulse air source to blow air into the inside and outside of the filter unit 15 according to the preset pressure and cycle through the first blowing device or the second blowing device.

[0047] Specifically, the dust-laden gas filtration system provided in this embodiment of the invention consists of two parts: a filter 10 and a jet cleaning system 20.

[0048] The filter unit 10 is divided into two independent chambers, namely the first chamber 11 and the second chamber 12, which are connected by the filter unit 15.

[0049] by Figure 1 For example, the filter is provided with a partition 16 inside, which divides the internal space of the filter 10 into a first chamber 11 and a second chamber 12. The partition 16 is provided with a hole through which the filter unit 15 passes to connect the first chamber 11 and the second chamber 12.

[0050] It is worth mentioning that, since the dust-laden gas filtered by the filter is mostly high-temperature dust-laden gas generated in industries such as coal gasification, petroleum catalytic cracking, biomass gasification, waste incineration and metallurgy, its interior is often in a high-temperature state. Preferably, the material of the partition 16 is 304 stainless steel.

[0051] The filter unit 15 is used to filter the dust-containing gas entering the filter system. As mentioned above, the filter unit 15 connects the first chamber 11 and the second chamber 12. The filter unit 15 is provided with a dust-containing gas inlet 151 in the first chamber 11. The dust-containing gas inlet 151 filters the dust particles in the passing dust-containing gas, so that clean gas enters the filter unit 15 and is discharged from the clean gas outlet 152 located in the second chamber 12.

[0052] The first chamber 11 is provided with an air inlet 13. The dust-laden gas to be filtered enters the filter through the air inlet 13. After filtration is completed, the clean gas discharged from the clean gas outlet 152 is discharged from the filtration system through the air outlet 14 opened in the second chamber 12 and enters the corresponding gas collection device.

[0053] Continue with Figure 1 For example, Figure 1 As shown, the filter unit 15 can be a filter tube. The dust-laden gas to be filtered is filtered through the clean gas inlet 151 opened in the filter tube wall, and the filtered gas is discharged from the clean gas outlet 152 of the filter tube located in the second chamber 12.

[0054] The first blowing device has one or more blowing ports 21, each blowing port 21 corresponds to a clean gas outlet 152 of a filter tube, and has a certain distance between it and the clean gas outlet 152. The distance between them is set according to actual needs, and this embodiment does not make a specific limitation.

[0055] Under the control of the pulse control device 23, the first jet cleaning device, as the main jet cleaning pipeline, performs backflushing and dust removal on the filter tube according to the preset pressure and cycle.

[0056] by Figure 1 For example, the first jet cleaning device includes a first air storage device 24 and a first pulse control valve 25. The first pulse control valve 25 is connected to the first air storage device 24. The pulse control device 23 controls the first pulse control valve so that the first jet cleaning device, as the main jet cleaning pipeline, performs backflushing and dust removal on the filter tube according to the preset pressure and cycle.

[0057] The second jet-blowing device includes an annular airflow jet-blowing structure 22, which is fitted onto the end of the filter tube near the clean gas outlet 152. After being connected to the pulse pipeline, the jet-blowing airflow input from the pulse pipeline passes through the annular outlet 221 to form an annular airflow surrounding the filter tube. During the filtration of dust-laden gas, dust particles in the industrial dust-laden gas gradually accumulate on the outer surface of the filter element. As filtration time progresses, the dust layer on the outer surface of the filter element gradually thickens and accumulates and connects between the filter elements, forming a dust bridging phenomenon, which seriously affects the regeneration of the filter tube. The annular airflow surrounding the filter tube generated by the second jet-blowing device in this embodiment serves as a pre-assisted jet-blowing before backflushing the filter tube. It can loosen the dust layer outside the filter tube in advance. Furthermore, after the second jet-blowing device finishes its jet-blowing and the first jet-blowing device starts its jet-blowing again, the pressure difference inside and outside the filter tube increases, increasing the air velocity of the jet-blowing airflow, entraining more gas, further improving the filtration effect, and thus improving the efficiency of backflushing.

[0058] by Figure 1 For example, the second blowing device also includes a second air storage device 26 and a second pulse control valve 27. The second pulse control valve 27 is connected to the second air storage device 26. The pulse control device 23 controls the second pulse control valve so that the second blowing device blows the filter tube according to a preset pressure and cycle before the first blowing device performs backflushing, so as to generate an annular airflow around the filter tube and loosen the dust layer outside the filter tube in advance.

[0059] In summary, the dust-laden gas filtration system provided in this embodiment of the invention improves the cleaning effect and regeneration efficiency of the filter element by setting an annular nozzle on the filter unit and forming an annular jet airflow around the filter element during the jet cleaning process, which loosens / breaks the dust layer outside the filter element.

[0060] Based on the above embodiments, the filter unit 15 further includes at least one filter tube, and the annular airflow jet structure 22 is sleeved on the filter tube.

[0061] When the filter unit 15 has multiple filter tubes, each filter tube is fitted with a corresponding annular airflow blowing structure 22 so that each filter tube can be blown with an annular airflow before regeneration, loosening the dust layer on the outer wall of the filter tube and improving the efficiency of regeneration blowing.

[0062] Figure 2 This is a schematic diagram of the annular airflow jet structure provided in an embodiment of the present invention, as shown below. Figure 2As shown, the annular airflow jet structure 22 has a double-layered cylindrical shell 221, and the outer wall of the double-layered cylindrical shell 221 is provided with at least one air inlet 222; the annular air outlet 223 is opened at the first end of the annular airflow jet structure 22 to form an annular airflow around the outer periphery of the filter unit 15.

[0063] Specifically, the main body of the annular airflow jet structure 22 provided in this embodiment is a double-layered cylindrical shell 221 with an inner cavity. An air inlet 222 is provided on its outer wall. The air inlet 222 is connected to the gas outlet of the second jet device and is used to receive the airflow output by the second jet device.

[0064] The bottom end of the double-layer cylindrical shell 221 is provided with an annular air outlet 223. The width of the annular air outlet 223 can be set according to specific needs, and is not specifically limited here.

[0065] When the airflow output by the second jetting device enters the double-layer cylindrical shell 221 through the air inlet 222, it is output through the annular air outlet 223 at the bottom. At this time, the airflow will form an annular airflow under the action of the annular air outlet 223 and be output.

[0066] When the annular airflow is output from the annular outlet 223, it can surround the outer periphery of the filter unit 15 and flow along the axial direction of the filter unit 15, blowing on the outer wall of the filter unit 15, thereby loosening the dust layer attached to the outer wall.

[0067] Figure 3 This is a schematic diagram of the annular airflow jet structure provided in an embodiment of the present invention, as shown below. Figure 3 As shown, based on the above embodiments, the annular airflow jet structure 22 further includes an annular guide plate 224. The annular guide plate 224 is located between the outer wall of the double-layer cylindrical shell 221 and the annular air outlet 223, and is fixedly installed on the end wall of the first end of the annular airflow jet structure 22. It extends from the end wall to the second end of the annular airflow jet structure 22, and leaves an air gap between it and the second end. The airflow enters the interior of the annular airflow jet structure through the air inlet, and is discharged from the annular air outlet after passing through the air gap.

[0068] Specifically, the annular guide plate 224 is disposed between the annular air outlet 223 and the outer wall of the housing with the air inlet 222.

[0069] The fixed end of the annular guide plate 224 is located at the first end of the annular jet structure 22, that is, at the bottom end where the annular air outlet 223 is opened, and its free end extends to the second end, that is, the closed top end; and a certain distance is separated between the free end and the second end, which serves as an air gap.

[0070] When the output airflow of the second jetting device enters the annular jetting device 22 from the air inlet 222, it is guided by the annular guide plate 224, passes through the air gap, and is then output through the annular air outlet 223, thereby uniformly distributing the gas pressure and airflow entering the annular jetting device 22.

[0071] Based on the above embodiments, the filter unit 15 further includes at least two filter tubes, and an annular airflow jet structure 22 is sleeved on the filter tubes; the annular airflow jet structures 22 are connected by a connecting pipe 28.

[0072] like Figure 1 As shown, the filter unit 15 inserted on the partition 16 inside the filter has multiple filter tubes, and each filter tube is fitted with an annular airflow jet structure 22.

[0073] As mentioned above, the annular airflow jet structure 22 is provided with an air inlet 222. On the one hand, the air inlet 22 is connected to the second jet device, and the gas output by the second jet device is introduced into the annular airflow jet structure 22.

[0074] When the filter unit 15 has multiple filter tubes, adjacent filter tubes are interconnected through connecting pipes 28, so that the gas output by the second jetting device passes through the annular jetting structure 22 of the first filter tube and then passes through the annular jetting structure 22 of the subsequent filter tubes in sequence.

[0075] Specifically, when the filter unit 15 has multiple filter tubes, except for the annular airflow jet structure 22 of the last filter tube, the annular airflow jet structure 22 of the other filter tubes all have two air inlets 222 on their outer walls, which are connected to each other through the connecting pipe 28.

[0076] Continue as Figure 1 As shown, based on the above embodiments, the dust-laden gas filtration system provided by the present invention further includes at least one concentrator 29, which is disposed below the annular airflow jet structure 22. The concentrator 29 can cause the annular airflow ejected from the annular outlet 223 to converge towards the outer wall of the filter tube.

[0077] The manifold 29 is a cylindrical structure whose inner diameter gradually narrows from top to bottom, and is fitted onto at least a portion of the filter tube.

[0078] Specifically, the starting section of the manifold 29 corresponds to the annular air outlet 223 of the annular airflow blowing structure 22. The annular airflow output from the annular air outlet 223 continues to pass through the manifold 29, and under the action of the manifold 29, it flows close to the outer wall of the filter tube, thereby further improving the loosening effect on the dust layer on the outer wall and ultimately improving the efficiency of filter tube regeneration.

[0079] Figure 4 This is a schematic diagram of the combiner structure provided in an embodiment of the present invention, as shown below. Figure 4 As shown, based on the above embodiments, the combiner 29 is further divided along the axial direction into: a first rectifying section 291, which is close to the annular air outlet 223 of the annular airflow blowing structure 22, has a large inner diameter and remains unchanged along the axial direction; a second rectifying section 292, whose inner diameter narrows from top to bottom; and a third rectifying section 293, which has a small inner diameter and remains unchanged along the axial direction.

[0080] Specifically, the first rectification section 291 is connected to the annular outlet 223 of the annular airflow jet structure 22, and serves as a transition section to receive the annular airflow output by the annular airflow jet structure 22.

[0081] In one embodiment, its inner diameter is the largest in the confluencer 29. Preferably, the inner diameter of the first rectifier section 291 is the same as the diameter of the annular outlet 223, thereby better transitioning the annular airflow output from the annular outlet 223.

[0082] The inner diameter of the second rectifier section 292 gradually narrows, thereby converging the annular airflow so that the annular airflow can get closer to the outer wall of the filter tube, thereby further improving the loosening effect on the dust layer on the outer wall and ultimately improving the efficiency of filter tube regeneration.

[0083] In one embodiment, the third rectifier section 293 has the smallest inner diameter and remains unchanged along the axial direction. After the annular airflow is collected by the second rectifier section 292, it continues to flow through the third rectifier section 293. Under the constraint of the third rectifier section 293, it can continue to flow along the outer wall of the filter tube, thereby reducing the diffusion of the annular airflow towards the outer wall of the filter tube, further increasing the blowing range of the annular airflow output by the annular airflow blowing structure 22, thereby further improving the loosening effect on the dust layer on the outer wall, and ultimately improving the efficiency of filter tube regeneration.

[0084] Continue to refer to Figure 4 Based on the above embodiments, the inner wall of the first rectifier section 291 of the combiner 29 is provided with a guide vane 2911, which is used to make the annular airflow ejected from the annular outlet 223 move closer to the outer wall of the filter tube.

[0085] Specifically, the guide vane 2911 can improve airflow on the one hand, and on the other hand, during the filter tube regeneration process, after the second jet blowing device back-blowing, due to the presence of negative pressure, free dust particles may be adsorbed onto the filter tube wall. The guide vane 2911 can block the back-absorbed dust particles at this time, thereby reducing the occurrence of secondary adsorption and sedimentation, and further improving the efficiency of filter tube regeneration.

[0086] Preferably, the angle α between the guide vane 2911 and the free end direction of the combiner 29 is 30 degrees to 60 degrees.

[0087] Preferably, the included angle α is 45 degrees, which can maximize the flow gas velocity, increase the pressure difference inside and outside the filter tube, and improve the backflushing effect.

[0088] Preferably, the inner surface of the second rectifying section 292 is curved, thereby further improving the guiding effect on the annular airflow.

[0089] Figure 5 A schematic flowchart of a method for cleaning dust using the above-described dust-laden gas filtration device is provided as an embodiment of the present invention, as follows: Figure 5 As shown, the method includes:

[0090] S101: Activate the second jet cleaning device and use the annular airflow jet cleaning structure 22 to perform jet cleaning of the filter unit 15 for a first preset time.

[0091] In this step, the second jet blowing device is first activated, and the annular airflow generated by the annular jet blowing structure 22 blows the dust layer on the outer wall of the filter tube for a certain period of time, thereby loosening the dust layer on the outer wall of the filter tube.

[0092] S102: Close the second jetting device;

[0093] S103: Turn on the first jet cleaning device and perform jet cleaning of the filter unit 15 for a second preset time through the jet nozzle 21;

[0094] In this step, after the annular airflow in step S101 loosens the dust layer on the outer wall of the filter tube, the first jet cleaning device is turned on, and the back-blowing cleaning begins at the jet nozzle 21 at the clean gas outlet 152 of the filter tube. The back-blowing airflow enters the interior of the filter tube through the clean gas outlet 152 and impacts the dust layer on the outer wall of the filter tube through the dust-laden gas inlet 151.

[0095] As mentioned earlier, the annular airflow in S101 has loosened the dust layer on the outer wall of the filter tube. When the backflush airflow in this step impacts the outer wall of the filter tube, it can peel off the dust layer as much as possible, thereby improving the efficiency of filter tube regeneration.

[0096] It is worth mentioning that the blowing device with the annular airflow blowing structure 22 is used for blowing, and the blowing airflow is released in advance. Through the converging effect of the converging device 29, the blowing airflow flows along the axial direction of the filter unit 15, reducing the pressure on the outside of the filter unit. This loosens the dust on the filter unit 15 and effectively solves the problem of gas backflow and secondary accumulation of dust particles caused by the negative pressure zone generated by the filter unit 15 during single pulse blowing.

[0097] S104: Close the first jetting device;

[0098] S105: Activate the second jet cleaning device, and perform jet cleaning of the filter unit 15 for a third preset time through the annular airflow jet cleaning structure 22; and

[0099] Repeat steps S101-S105 until the dust residue on filter unit 15 is below the preset standard.

[0100] Based on the above embodiments, the blowing pressure of the second blowing device is further 1 / 6 to 2 / 3 of the blowing pressure of the first blowing device.

[0101] Preferably, the blowing pressure of the second blowing device is 1 / 3 or 1 / 2 of the blowing pressure of the first blowing device, so that the second blowing device can maximize the speed of the blowing airflow outside the pipe and reduce the pressure outside the pipe, while the first blowing device causes the pressure to accumulate and rise inside the pipe, thereby maximizing the pressure difference between the inside and outside of the filter pipe and improving the backflushing effect.

[0102] In one embodiment, S101: The pulse control device 23 controls the opening of the second pulse control valve 27 so that the gas in the second gas storage device 26 blows the filter unit 15 for 0.10s-0.40s through the annular airflow blowing structure 22 to clean the dust.

[0103] S102: Pulse control device 23 controls the closure of the second pulse control valve 27;

[0104] S103: The pulse control device 23 controls the opening of the first pulse control valve 25 so that the gas in the first gas storage device 24 blows the filter unit 15 through the blow nozzle 21 for 0.05s-0.40s to clean the dust.

[0105] S104: Pulse control device 23 controls the closure of the first pulse control valve 25;

[0106] S105: The pulse control device 23 controls the opening of the second pulse control valve 27 so that the gas in the second gas storage device 26 blows the filter unit 15 for 0.05s-0.10s through the annular airflow blowing structure 22; the secondary start of the annular nozzle blowing can effectively eliminate the problem of negative pressure generated when the first blowing device ends, and effectively eliminate the problem of secondary backflow adsorption of dust particles.

[0107] Repeat steps S101-S105 until the dust residue on filter unit 15 is below the preset standard.

[0108] The dust removal method using the aforementioned dust-laden gas filtration system provided in this embodiment of the invention first loosens the dust layer on the outer wall of the filter tube through an annular airflow formed by an annular airflow jet structure before backflushing the filter tube, thereby improving the efficiency of filter tube regeneration.

[0109] The execution subject of the dust removal method using the aforementioned system provided in the embodiments of the present invention includes, but is not limited to, a computer and an industrial control computer.

[0110] Figure 6 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the electronic device may include: a processor 601, a communication interface 602, a memory 603, and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 communicate with each other through the communication bus 604. The processor 601 can call logical instructions in the memory 603 to execute the following method: turn on the second jet cleaning device to perform jet cleaning of the filter unit for a first preset time through the annular airflow jet cleaning structure; turn off the second jet cleaning device; turn on the first jet cleaning device to perform jet cleaning of the filter unit for a second preset time through the jet nozzle; turn off the first jet cleaning device; turn on the second jet cleaning device to perform jet cleaning of the filter unit for a third preset time through the annular airflow jet cleaning structure; and repeat the above steps until the dust residue on the filter unit is lower than a preset standard.

[0111] Furthermore, the logical instructions in the aforementioned memory 603 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0112] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can perform the methods provided in the above-described method embodiments, such as: turning on the second jet cleaning device and performing jet cleaning of the filter unit for a first preset time through the annular airflow jet cleaning structure; turning off the second jet cleaning device; turning on the first jet cleaning device and performing jet cleaning of the filter unit for a second preset time through the jet nozzle; turning off the first jet cleaning device; turning on the second jet cleaning device and performing jet cleaning of the filter unit for a third preset time through the annular airflow jet cleaning structure; and repeating the above steps until the dust residue on the filter unit is lower than a preset standard.

[0113] This embodiment provides a computer-readable storage medium storing a computer program that causes a computer to execute the methods provided in the above-described method embodiments, including, for example: turning on the second jet cleaning device and performing jet cleaning of the filter unit for a first preset time through the annular airflow jet structure; turning off the second jet cleaning device; turning on the first jet cleaning device and performing jet cleaning of the filter unit for a second preset time through the jet nozzle; turning off the first jet cleaning device; turning on the second jet cleaning device and performing jet cleaning of the filter unit for a third preset time through the annular airflow jet structure; and repeating the above steps until the dust residue on the filter unit is lower than a preset standard.

[0114] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0116] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0117] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0118] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0119] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dust-laden gas filtering device having a ring-shaped air flow injection structure, characterized by, include: The filter has a first chamber and a second chamber. The first chamber has an air inlet and the second chamber has an air outlet. The filter includes a filter unit. The dust-laden gas inlet of the filter unit is located in the first chamber, and the clean gas outlet of the filter unit is located in the second chamber. The jetting system includes: The first jetting device has jetting nozzles that correspond to and are spaced apart from the clean gas outlets of the filter unit; The second jetting device includes an annular airflow jetting structure, which has an annular air outlet that can form an annular airflow around the outer periphery of the filter unit. A pulse control device is used to control the pulse air source to blow air through the first blowing device or the second blowing device to blow air into the inside and outside of the filter unit according to a preset pressure and cycle. The filter unit includes at least one filter tube, and the annular airflow jet structure is sleeved on the filter tube. At least one concentrator is disposed below the annular airflow jet structure, and the concentrator is capable of causing the annular airflow ejected from the annular outlet to converge toward the outer wall of the filter tube. The combiner is a cylindrical structure whose inner diameter narrows from top to bottom, and is fitted onto at least a portion of the filter tube; The combiner is divided into the following sections along the axial direction: A first rectifying section is located near the annular air outlet of the annular airflow jet structure, has a large inner diameter, and remains unchanged along the axial direction; A second rectifier section, the inner diameter of which gradually narrows from top to bottom; The third rectifier section has a small inner diameter and remains constant along the axial direction; The inner wall of the first rectifier section of the combiner is provided with a guide vane, which is used to direct the annular airflow ejected from the annular outlet toward the outer wall of the filter tube.

2. The dust-laden gas filtration device with an annular airflow jet structure according to claim 1, characterized in that, The annular airflow jet structure has a double-layered cylindrical shell, and the outer wall of the double-layered cylindrical shell is provided with at least one air inlet; the annular air outlet is opened at the first end of the annular airflow jet structure to form an annular airflow around the outer periphery of the filter unit.

3. The dust-laden gas filtering apparatus having a ring-shaped air flow blowing structure according to claim 2, characterized by, The annular airflow jet structure also includes an annular guide plate, which is located between the outer wall and the inner wall of the double-layer cylindrical shell and is fixedly disposed on the end wall of the first end of the annular airflow jet structure. The guide plate extends from the end wall to the second end of the annular airflow jet structure and leaves an air gap between the guide plate and the second end. The airflow enters the interior of the annular airflow jet structure through the air inlet and is discharged from the annular air outlet after passing through the air gap.

4. The dust-laden gas filtering device having a ring-shaped airflow blowing structure according to claim 2, characterized by, The filtration unit includes at least two filter tubes, and the annular airflow jet structure is sleeved on the filter tubes; the annular airflow jet structures are connected to each other through connecting pipes.

5. The dust-laden gas filtering device having a ring-shaped airflow blowing structure according to claim 1, characterized by, The angle between the guide vane and the free end of the combiner is 30 degrees to 80 degrees.

6. The dust-laden gas filtering device having a ring-shaped airflow blowing structure according to claim 1, characterized by, The inner surface of the second rectifier section is curved.

7. A method of soot cleaning using the apparatus of any one of claims 1-6, wherein, The method includes: Turn on the second jet cleaning device and use the annular airflow jet cleaning structure to clean the filter unit for a first preset time. Turn off the second jetting device; Turn on the first jet cleaning device and perform jet cleaning of the filter unit for a second preset time through the jet nozzle; Shut down the first jetting device; The second jet cleaning device is activated, and the filter unit is cleaned by jet cleaning for a third preset time through the annular airflow jet structure; and Repeat the above steps until the dust residue on the filter unit is below the preset standard.

8. The method of claim 7, wherein, The blowing pressure of the second blowing device is 1 / 6 to 2 / 3 of the blowing pressure of the first blowing device.

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