A dust-laden gas filtration system

Abstract

The present invention provides a dust-laden gas filtration system and a method for using the system for dust cleaning. The system includes: a filter having a first chamber and a second chamber, the first chamber having an air outlet and the second chamber having an air inlet, and further including: a filter unit, the dust-laden gas inlet of which is arranged in the second chamber and the clean gas outlet of which is arranged in the first chamber; a damping baffle including: a distribution plate arranged around the filter unit; a damping baffle fixedly arranged on the distribution plate and used to block dust particles from adhering to the filter unit; a spraying system including: a pulse pipeline for performing double-pulse spraying on the filter unit; a spraying pipeline having a spray port corresponding to the clean gas outlet of the filter unit at one end and connected to the pulse pipeline at the other end. By providing the double-pulse pipeline and the damping baffle, the backflow of dust particles during the back-blowing cleaning process is reduced, thereby improving the efficiency of filter tube regeneration.

Description

Technical Field

[0001] The present invention relates to the technical field of dust-laden gas filtration, and in particular to a dust-laden gas filtration system capable of cleaning a filter through pulse backblowing. Background Art

[0002] In industries such as coal gasification, petroleum catalytic cracking, biomass gasification, waste incineration and metallurgy, high-temperature dust-laden gases are often generated. In order to meet process requirements and relevant environmental emission standards, the dust-laden gases generated in the above processes need to be purified and dust-removed at high temperatures.

[0003] Industrial dust removal is often achieved using test tube filters. The dust removal process consists of two main stages: filtration of the dust-laden gas and regeneration of the filter tube. By applying a pulsed backflush in the opposite direction of filtration, the filter tube is backflushed, causing the dust layer to fall off and enter the ash hopper, thereby regenerating the filter tube.

[0004] However, there are also some problems with regenerating the filter tube through pulse backblowing. During the negative pressure back-suction stage of the pulse backblowing process, some fine dust particles re-attach to the surface of the filter tube under the action of the airflow, which is not conducive to the regeneration of the filter tube and reduces the efficiency of the filter tube cleaning. Summary of the Invention

[0005] In response to the problems in the prior art, an embodiment of the present invention provides a dust-laden gas filtration system, which can at least partially solve the problems in the prior art.

[0006] In one aspect, the present invention provides a dust-laden gas filtration system, comprising:

[0007] The filter comprises a first chamber and a second chamber, wherein the first chamber has an air inlet and the second chamber has an air outlet, and further comprises:

[0008] a filter unit, wherein the dust-laden gas inlet of the filter unit is arranged in the first chamber, and the clean gas outlet of the filter unit is arranged in the second chamber;

[0009] Damping baffle, including:

[0010] a distribution plate, the distribution plate being arranged around the filter unit;

[0011] a damping baffle, the damping baffle being fixedly disposed on the distribution plate and being used to prevent dust particles from adhering to the filter unit;

[0012] The blowing system comprises:

[0013] a pulse pipeline for performing double-pulse spraying on the filter unit;

[0014] The blowing pipeline has a blowing port at one end, the blowing port corresponds to the clean gas outlet of the filter unit, and the other end is connected to the pulse pipeline.

[0015] Furthermore, the filter unit includes at least one filter tube, and the clean gas outlet of each filter tube is correspondingly provided with one of the blowing ports.

[0016] Furthermore, the pulse pipeline includes a pulse controller, and the pulse controller is used to control the pulse pipeline to perform double-pulse spraying on the filter unit.

[0017] Furthermore, the pulse pipeline includes a first pipeline and a second pipeline, and the first pipeline includes:

[0018] a first gas storage device;

[0019] a first pulse control valve connected to the first gas storage device;

[0020] The second pipeline includes:

[0021] a second gas storage device;

[0022] a second pulse control valve connected to the second gas storage device;

[0023] The pulse controller is connected to the first pulse control valve and the second pulse control valve respectively, and is used to control the opening and / or closing of the pulse control valve.

[0024] Furthermore, the free end of the distribution plate is tapered after extending to be flush with the bottom of the filter.

[0025] Furthermore, the distance between each two fixed ends of the damping baffles is 2 cm-4 cm.

[0026] Furthermore, the included angle between the damping baffle and the free end direction of the distribution plate is 30 degrees to 60 degrees.

[0027] Furthermore, the cross-sectional shape of the damping baffle is wavy or sawtooth.

[0028] On the other hand, the present invention also provides a method for cleaning dust using the above system, the method comprising:

[0029] Opening the pulse pipeline and performing a spray cleaning on the filter unit through the spray port for a first preset time;

[0030] closing the pulse pipeline and pausing for a second preset time;

[0031] Opening the pulse pipeline and performing a spray cleaning on the filter unit through the spray port for a third preset time;

[0032] closing the pulse line and pausing for a fourth preset time; and

[0033] Repeat the above steps until the dust residue on the filter unit is lower than the preset standard.

[0034] Furthermore, the pressure of the ash blowing and cleaning during the first preset time is 2-5 times the pressure of the ash blowing and cleaning during the third preset time.

[0035] The dust-laden gas filtration system provided by the embodiment of the present invention, by setting up a double-pulse circuit, back-blows the dust on the filter tube according to a preset pulse period and blowing pressure during the filter tube regeneration stage, thereby reducing the secondary deposition of dust on the surface of the filter unit caused by negative pressure back-suction during the single-pulse back-blow process. In addition, by setting a damping baffle in the filter unit, it can further reduce the dust attached to the surface of the filter unit during negative pressure back-suction, thereby ultimately improving the efficiency of cleaning and regeneration of the filter tube of the filter unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. 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 work. In the drawings:

[0037] Figure 1 It is a structural schematic diagram of a dust-laden gas filtration system provided by one embodiment of the present invention.

[0038] Figure 2 It is a partial structural diagram of a dust-laden gas filtration system provided by one embodiment of the present invention.

[0039] Figure 3 It is a structural schematic diagram of a filter unit provided in one embodiment of the present invention.

[0040] Figure 4 It is a structural schematic diagram of a damping baffle provided by an embodiment of the present invention.

[0041] Figure 5 It is a schematic flow chart of a dust cleaning method provided by one embodiment of the present invention.

[0042] Figure 6 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. Here, the exemplary 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, in the absence of conflict, the embodiments of the present application

[0044] Figure 1 FIG. 1 is a schematic structural diagram of a dust-laden gas filtration system according to an embodiment of the present invention. Figure 1 As shown, the dust-laden gas filtration system provided by the embodiment of the present invention includes: a filter, which is provided with a first chamber 11 and a second chamber 12, the first chamber 11 is provided with an air inlet 14, and the second chamber 12 is provided with an air outlet 13, further comprising: a filter unit 15, the dust-laden gas inlet 151 of the filter unit 15 is arranged in the first chamber 11, and the clean gas outlet 152 of the filter unit 15 is arranged in the second chamber 12; a damping baffle 16, comprising: a distribution plate 161, the distribution plate 161 is arranged around the filter unit 15; a damping baffle 162, the damping baffle 162 is fixedly provided on the distribution plate 161, and prevents dust particles from adhering to the filter unit 15;

[0045] The blowing system includes: a pulse pipeline 21 for performing double-pulse blowing on the filter unit 15; a blowing pipeline 22, one end of which is provided with a blowing port 221, the blowing port 221 corresponds to the clean gas outlet 152 of the filter unit 15, and the other end is connected to the pulse pipeline 21.

[0046] Specifically, the dust-laden gas filtering system provided in the embodiment of the present invention is composed of two parts: a filter 10 and a blowing system.

[0047] The interior of the filter unit 10 is divided into two independent spaces, namely a first chamber 11 and a second chamber 12 . The first chamber 11 and the second chamber 12 are connected via the filter unit 15 .

[0048] by Figure 1 For example, a partition 17 is provided inside the filter, which divides the internal space of the filter into a first chamber 11 and a second chamber 12, and a plug hole is provided on the partition 17, through which the filter unit 15 passes to connect the first chamber 11 and the second chamber 12.

[0049] 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 17 is 304 stainless steel.

[0050] 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 with the second chamber 12. The filter unit 15 is provided with a dust-containing gas inlet 151 in the part of the first chamber 11. The dust-containing gas inlet 151 filters the dust particles in the passing dust-containing gas, so that the clean gas enters the interior of the filter unit 15 and is discharged from the clean gas outlet 152 located in the second chamber 12.

[0051] The first chamber 11 is provided with an air inlet 14, and the dust-laden gas to be filtered enters the interior of the filter through the air inlet 14. After the filtration is completed, the clean gas discharged from the clean gas outlet 152 is discharged from the filtration system through the air outlet 13 opened in the second chamber 12 and enters the corresponding gas collecting device.

[0052] Continue with Figure 1 For example, the damping baffle 15 is disposed around the filter unit 15 to avoid backflow when the filter backflushing is about to end, thereby preventing the secondary deposition of fine dust particles in the filter unit 15 .

[0053] Specifically, the damping baffle 16 includes a distribution plate 161 arranged around the filter unit 15, and the distribution plate 161 is used to fix the damping baffle 162. The damping baffle 162 is distributed on the distribution plate 161 according to a preset arrangement. The arrangement is set according to specific needs and will not be repeated here.

[0054] By surrounding the filter unit 15 with a baffle having a damping baffle 162 , when the backflushing is completed, the dust particles brought by the backflow will be blocked by the damping baffle 162 and will not be deposited on the outer wall of the filter unit 15 for the second time, thereby improving the efficiency of the filter unit regeneration.

[0055] Preferably, the damping baffle 162 is an annular baffle and is fixedly disposed on the distribution plate 161 .

[0056] Figure 2 FIG. 1 is a partial structural diagram of a dust-laden gas filtration system provided by an embodiment of the present invention. Figure 1 and Figure 2 As shown, in one embodiment, a fixing hole 171 is provided on the partition 17 , and the distribution plate 161 passes through the fixing hole 171 and is fixed to the partition 17 through an end cover 1611 .

[0057] Continue with Figure 1 For example, the spray pipe 22 provided in the spray system is connected to the pulse pipe 21 at one end for receiving the airflow generated by the pulse pipe 21, and is provided with a spray port 221 at the other end. The spray port 221 is correspondingly arranged above the filter unit 15, for guiding the airflow generated by the pulse pipe 21 to the filter unit 15, performing double-pulse backblowing on the filter unit 15, and completing the regeneration of the filter unit 15.

[0058] Preferably, the blowing port 221 is correspondingly arranged at the clean gas outlet 152 of the filter unit 15, so that the blowing airflow can accurately enter the filter unit 15, improve the pulse back-blowing cleaning efficiency of fine to small particle dust, thereby effectively increasing the service life of the filter tube and reducing costs.

[0059] The dust-laden gas filtration system provided by the embodiment of the present invention, by setting up a double-pulse circuit, back-blows the dust on the filter tube according to a preset pulse period and blowing pressure during the filter tube regeneration stage, thereby reducing the secondary deposition of dust on the surface of the filter unit caused by negative pressure back-suction during the single-pulse back-blow process. In addition, by setting a damping baffle in the filter unit, it can further reduce the dust attached to the surface of the filter unit during negative pressure back-suction, thereby ultimately improving the efficiency of cleaning and regeneration of the filter tube of the filter unit.

[0060] On the basis of the above embodiments, further, the filter unit 15 includes at least one filter tube 151 , and a blowing port 221 is correspondingly provided at the clean gas outlet 152 of the filter tube 151 .

[0061] Figure 3 FIG. 1 is a schematic structural diagram of a filter unit provided in one embodiment of the present invention. Figure 3 As shown, the filter unit 15 includes a plurality of filter tubes 151 , and correspondingly, the damping baffle 16 is disposed around the filter tubes 151 of the filter unit 15 .

[0062] On the basis of the above embodiments, further, the pulse pipeline 21 includes a pulse controller 213 , and the pulse controller 213 is used to control the pulse pipeline 21 to perform double-pulse spraying on the filter unit 15 .

[0063] Specifically, the control pulse pipeline 21 may be provided with only one pipeline, and the pulse controller 213 controls the pipeline to perform pulse injection respectively, thereby realizing double-pulse injection.

[0064] On the other hand, the pulse pipeline 21 can also be set as two pipelines, and the pulse controller 213 controls the two pipelines to perform pulse injection respectively, thereby realizing double-pulse injection.

[0065] by Figure 1 For example, Figure 1As shown, the pulse pipeline 21 includes a first pipeline 211 and a second pipeline 212. The first pipeline 211 includes: a first gas storage device 2111, a first pulse control valve 2112, connected to the first gas storage device 2111; the second pipeline 212 includes: a second gas storage device 2121; a second pulse control valve 2122 connected to the second gas storage device 2121; a pulse controller 213, respectively connected to the first pulse control valve 2112 and the second pulse control valve 2122, for controlling the opening and / or closing of the pulse control valve.

[0066] Specifically, the two pulse control valves on the first pipeline 211 and the second pipeline 212 of the pulse pipeline 21 are connected to their respective air storage devices to form a dual-intensity pulse injection pipeline; the two-circuit pulse control valves are both connected to the pulse controller 213, and the pulse controller 213 controls the opening or closing of the two-circuit pulse control valves according to the preset pulse period, thereby performing dual-pulse injection on the filter unit 15 through the injection pipeline 22.

[0067] Figure 4 FIG. 1 is a schematic structural diagram of a damping baffle provided by an embodiment of the present invention. Figure 4 As shown, based on the above embodiments, further, the free end of the distribution plate 161 is tapered after extending to be flush with the bottom of the filter unit 15 .

[0068] On the basis of the above embodiment, further, the distance between the fixed ends of each two damping baffles 162 is 2 cm-4 cm.

[0069] By setting the above-mentioned spacing, the damping baffles have a suitable distance, which reduces the difficulty of processing on the one hand, and ensures the efficiency of preventing dust from being secondary adsorbed back to the filter unit 15 on the other hand.

[0070] Preferably, the distance between the damping baffles 162 is 3 cm, thereby reducing the flow of gas outside the filter tube into the filter tube and effectively preventing the formation of particle backflow.

[0071] On the basis of the above embodiment, further, the angle between the damping baffle 162 and the free end direction of the distribution plate 161 is 30 degrees to 60 degrees.

[0072] Specifically, the included angle between the damping baffle 162 and the vertical direction is set to 30 degrees to 60 degrees, which can ensure the efficiency of blocking dust while reducing the interference and obstruction to the dust-laden gas during filtration.

[0073] Preferably, the included angle between the damping baffle 162 and the vertical direction is 45 degrees, thereby better preventing the negative pressure adsorption of fine dust suspended on the surface of the filter tube, and effectively improving the filtration efficiency of the filter tube.

[0074] On the basis of the above embodiment, further, the damping baffle 162 is wavy or sawtooth in shape.

[0075] Figure 5 This is a flow chart of a dust cleaning method according to an embodiment of the present invention. Figure 5 As shown, the embodiment of the present invention provides a method for cleaning dust using the aforementioned dust-laden gas filtration system, comprising:

[0076] S101: Open the pulse pipeline 21 and perform a first preset time of spray cleaning on the filter unit 15 through the spray port 221;

[0077] In this step, the pulse line 21 performs the first back-flushing and dust cleaning on the filter unit 15 according to the preset parameters.

[0078] S102: closing the pulse line 21 and pausing for a second preset time;

[0079] S103: Open the pulse pipeline 21 and perform a third preset time of spray cleaning on the filter unit 15 through the spray port 221;

[0080] In this step, the pulse pipeline 21 performs a second back-blowing cleaning on the filter device 15 according to the preset parameters, thereby eliminating the negative pressure generated during the first blowing cleaning, making the pressure inside and outside the filter tube of the filter device 15 balanced, reducing the flow of gas outside the filter tube into the filter tube, and effectively preventing the formation of particle backflow, thereby improving the back-blowing effect of the filter tube.

[0081] S104: closing the pulse line 21 and pausing for a fourth preset time;

[0082] Repeat S101-S104 until the dust residue on the outer wall of the filter unit 15 is lower than a preset standard. The standard is set according to actual needs and is not specifically limited in this embodiment.

[0083] In one embodiment, S101: the pulse controller 213 controls the opening of the first pulse control valve 2112 so that the gas in the first gas storage device 2111 passes through the injection port 221 to perform a first injection cleaning of the filter unit 15 for 250ms-350ms;

[0084] S102: The pulse controller 213 controls the first pulse control valve 2112 to open and pauses for 50ms-200ms;

[0085] S103: The pulse controller 213 controls the opening of the second pulse control valve 2122, so that the gas in the second gas storage device 2121 is blown through the nozzle 221 to clean the filter unit 15 for a second time for 50ms-100ms, thereby eliminating the negative pressure generated during the first blow-cleaning, and making the pressure inside and outside the filter tube of the filter device 15 reach a balance, reducing the flow of gas outside the filter tube into the filter tube, effectively preventing the formation of particle backflow, and thus improving the backblowing effect of the filter tube.

[0086] On the basis of the above embodiments, further, the pressure of the soot blowing during the first preset time is 2-5 times the pressure of the soot blowing during the third preset time.

[0087] Specifically, taking the 0.5MPa back-blowing pressure condition as an example, the pressure of the first preset time of spray cleaning is 2-5 times the pressure of the third preset time of spray cleaning, preferably 3 times or 4 times, thereby effectively avoiding the back-absorption of fine dust caused by the "negative pressure zone" formed on the upper part of the filter tube after the first spraying, providing a longer deposition time for the dust falling off the surface of the filter tube, and enhancing the back-blowing effect.

[0088] The embodiment of the present invention provides a method for cleaning using the aforementioned dust-laden gas filtration system, which uses a double-pulse blowing method to back-blow the dust on the filter tube during the regeneration stage of the filter tube, eliminating the negative pressure generated during the first blowing cleaning, so that the pressure inside and outside the filter tube is balanced, reducing the flow of gas outside the filter tube into the filter tube, effectively preventing the formation of dust backflow, and reducing the secondary deposition of dust on the surface of the filter unit caused by negative pressure back suction during the single-pulse back-blowing process, thereby improving the back-blowing cleaning efficiency of the filter tube.

[0089] The execution subject of the dust cleaning method provided in the embodiment of the present invention includes but is not limited to a computer, an industrial computer, etc.

[0090] Figure 6 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention is shown in FIG. Figure 6As 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 via the communication bus 604. The processor 601 may call the logic instructions in the memory 603 to execute the following method: opening the pulse pipeline and performing a spray cleaning of the filter unit through the spray port for a first preset time; closing the pulse pipeline and pausing for a second preset time; opening the pulse pipeline and performing a spray cleaning of the filter unit through the spray port for a third preset time; closing the pulse pipeline and pausing for a fourth preset time; and repeating the above steps until the dust residue on the filter unit is lower than a preset standard.

[0091] In addition, the logic instructions in the above-mentioned memory 603 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0092] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the methods provided by the above-mentioned method embodiments, for example, including: opening the pulse pipeline, and blowing and cleaning the filter unit through the nozzle for a first preset time; closing the pulse pipeline, pausing for a second preset time; opening the pulse pipeline, and blowing and cleaning the filter unit through the nozzle for a third preset time; closing the pulse pipeline, pausing for a fourth preset time; and repeating the above steps until the dust residue on the filter unit is lower than the preset standard.

[0093] This embodiment provides a computer-readable storage medium, which stores a computer program. The computer program enables the computer to execute the methods provided by the above-mentioned method embodiments, for example, including: opening the pulse pipeline, and performing spray cleaning on the filter unit through the spray port for a first preset time; closing the pulse pipeline, and pausing for a second preset time; opening the pulse pipeline, and performing spray cleaning on the filter unit through the spray port for a third preset time; closing the pulse pipeline, and pausing for a fourth preset time; and repeating the above steps until the dust residue on the filter unit is lower than the preset standard.

[0094] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0095] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts 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, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0096] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0098] Throughout this specification, reference to terms such as "one embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0099] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is 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 in the scope of protection of the present invention.

Claims

1. A dust-laden gas filtration system, characterized in that: include: The filter comprises a first chamber and a second chamber, wherein the first chamber has an air inlet and the second chamber has an air outlet, and further comprises: a filter unit, wherein the dust-laden gas inlet of the filter unit is arranged in the first chamber, and the clean gas outlet of the filter unit is arranged in the second chamber; Damping baffle, including: a distribution plate, the distribution plate being arranged around the filter unit; a damping baffle, the damping baffle being fixedly disposed on the distribution plate so as to surround the filter unit, the damping baffle being used to prevent dust particles from adhering to the filter unit; The blowing system comprises: a pulse pipeline for performing double-pulse spraying on the filter unit; The blowing pipeline has a blowing port at one end, the blowing port corresponds to the clean gas outlet of the filter unit, and the other end is connected to the pulse pipeline.

2. The dust-laden gas filtration system according to claim 1, characterized in that: The filter unit includes at least one filter tube, and a clean gas outlet of each filter tube is correspondingly provided with one of the blowing ports.

3. The dust-laden gas filtration system according to claim 1, characterized in that: The pulse pipeline includes a pulse controller, and the pulse controller is used to control the pulse pipeline to perform double-pulse spraying on the filter unit.

4. The dust-laden gas filtration system according to claim 3, characterized in that: The pulse pipeline includes a first pipeline and a second pipeline, wherein the first pipeline includes: a first gas storage device; a first pulse control valve connected to the first gas storage device; The second pipeline includes: a second gas storage device; a second pulse control valve connected to the second gas storage device; The pulse controller is connected to the first pulse control valve and the second pulse control valve respectively to control the opening and / or closing of the pulse control valve.

5. The dust-laden gas filtration system according to claim 1, characterized in that: The free end of the distribution plate is tapered after extending to be flush with the bottom of the filter unit.

6. The dust-laden gas filtration system according to claim 1, characterized in that: The distance between the fixed ends of each two damping baffles is 2 cm to 4 cm.

7. The dust-laden gas filtration system according to claim 1, characterized in that: The included angle between the damping baffle and the free end direction of the distribution plate is 30 degrees to 60 degrees.

8. The dust-laden gas filtration system according to claim 1, characterized in that: The cross-sectional shape of the damping baffle is wavy or sawtooth.

9. A method for cleaning dust using the system according to any one of claims 1 to 8, characterized in that: The method comprises: Opening the pulse pipeline and performing a spray cleaning on the filter unit through the spray port for a first preset time; closing the pulse pipeline and pausing for a second preset time; Opening the pulse pipeline and performing a spray cleaning on the filter unit through the spray port for a third preset time; closing the pulse line and pausing for a fourth preset time; and Repeat the above steps until the dust residue on the filter unit is lower than the preset standard.

10. The method according to claim 9, characterized in that The pressure of the soot blowing during the first preset time is 2-5 times the pressure of the soot blowing during the third preset time.

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