Combustible gas filter

Abstract

The application relates to a combustible gas filter which is suitable for being installed on a pipeline conveying combustible gas and comprises a tank body, a filter core, a flushing device, a rotating device and a water inlet pipe. An air inlet and an air outlet are arranged on the tank body, one end of the filter core is arranged at the air outlet, and the filter core is located in the cavity of the tank body. The flushing device is arranged around the periphery of the filter core and is rotatably arranged in the cavity of the tank body. The rotating device is arranged at the end of the tank body away from the air outlet, the rotating device is suitable for being connected with a boiler water supply pump, one end of the water inlet pipe is connected with the rotating device, the other end of the water inlet pipe is inserted into the cavity of the tank body and is communicated with the flushing device. A blowdown port is arranged on the tank body and is arranged at a position different from the air inlet. A spray head is arranged on the flushing device, a preset angle is arranged between the water spraying direction of the spray head and the length direction of the filter core, and the reaction force generated when the spray head flushes the filter core drives the flushing device to rotate with the axis of the filter core as the rotating shaft.

Description

Technical Field

[0001] This application relates to the field of filtration equipment for combustible gases, and more particularly to a combustible gas filter. Background Technology

[0002] Combustible gas filters can effectively filter out fine particulate matter contained in combustible gases, thereby ensuring the stable operation of subsequent equipment. However, after long-term use, the filter element inside the filter will become clogged due to the accumulation of particulate matter, thus affecting the filtration efficiency and effect of the filter. The traditional method usually involves shutting down the entire conveying pipeline and the generator set or boiler connected to the conveying pipeline, manually opening the filter's sealing cover, and then using a high-pressure water gun or brush to rinse the filter element inside the filter. Although this cleaning method can remove the particulate matter attached to the filter element, it requires stopping the operation of the entire conveying pipeline, which makes the filter cleaning work somewhat limited and unable to be cleaned at any time. Summary of the Invention

[0003] In view of this, this application proposes a combustible gas filter suitable for installation on a pipeline for conveying combustible gas, comprising: a tank, a filter element, a flushing device, a rotating device, and a water inlet pipe;

[0004] The tank has an air inlet and an air outlet, and one end of the filter element is located at the air outlet, and the filter element is located inside the cavity of the tank.

[0005] The rinsing device is arranged around the filter element and is rotatably installed inside the cavity of the tank.

[0006] The rotating device is located at the end of the tank body away from the air outlet. The rotating device is suitable for connecting to the boiler feed water pump. One end of the water inlet pipe is connected to the rotating device, and the other end of the water inlet pipe extends into the cavity of the tank body and is connected to the flushing device.

[0007] The tank body is equipped with a drain outlet, which is located at a different position from the air inlet.

[0008] The rinsing device is equipped with a nozzle, and the spray direction of the nozzle is at a preset angle to the length direction of the filter element, so that the reaction force generated when the nozzle rinses the filter element drives the rinsing device to rotate around the axis of the filter element.

[0009] In one possible implementation, the preset angle range is 60°–70°.

[0010] In one possible implementation, the flushing device includes a water distribution pipe and two parallel spray bars.

[0011] Two spray bars are positioned opposite each other at both ends of the water distribution pipe and are connected to the water distribution pipe. The nozzles are mounted on the spray bars.

[0012] The inlet pipe and the distribution pipe are connected.

[0013] In one possible implementation, there are two or more nozzles, which are spaced apart along the length of the spray bar.

[0014] In one possible implementation, the rotating device includes a bearing and a rotary joint;

[0015] The bearing is fixedly mounted on the tank body, and the water inlet pipe is rotatably mounted inside the bearing. One end of the water inlet pipe is connected to the flushing device, and the other end is connected to the rotary joint.

[0016] In one possible implementation, a flange assembly is also included; the filter element is detachably mounted at the air outlet via the flange assembly.

[0017] In one possible implementation, the main body of the filter element is cylindrical; the sidewall of the filter element has two or more filter holes, which are arranged in an array along the length of the filter element.

[0018] In one possible implementation, pressure sensors are installed at both the air inlet and the air outlet.

[0019] In one possible implementation, a level gauge is also included; the level gauge is positioned adjacent to the drain outlet.

[0020] In one possible implementation, the tank is equipped with a maintenance manhole.

[0021] Beneficial effects of this application

[0022] The delivery pipeline transports combustible gas into the tank through the inlet. The gas flows within the tank, and as it passes through the filter element, fine particles are intercepted, thus filtering the gas. The filtered gas flows out through the outlet and continues to flow to subsequent equipment, ensuring stable operation. When the filter element needs rinsing, there is no need to stop the entire delivery pipeline and connected equipment. The boiler feed pump is started, delivering high-pressure water through the inlet pipe to the rinsing device. The high-pressure water is sprayed from nozzles on the rinsing device at a specific angle, impacting the filter element surface. The reaction force generated by the spraying drives the rinsing device to rotate around the filter element's axis. During rotation, the nozzles continuously rinse the filter element circumferentially, effectively removing impurities from its surface. The rinsed wastewater is discharged through the drain outlet.

[0023] This application incorporates a rinsing device that utilizes the reaction force generated by the sprayed water to drive the device to rotate around the filter element's axis, thus achieving full circumferential rinsing of the filter element. This improves rinsing effectiveness and efficiency, extends the filter element's lifespan, and the rinsing device achieves automatic rotation solely through the reaction force of the high-pressure water jet from the spray nozzle, requiring no additional power. Compared to traditional methods using high-pressure water guns or brushes manually, this application's combustible gas filter allows for cleaning of the filter element at any time without manual opening, reducing labor intensity and preventing the shutdown of the entire pipeline due to cleaning operations. This minimizes inconvenience to residents and economic losses for industrial users caused by production stoppages.

[0024] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0026] Figure 1 This diagram shows the main structure of a combustible gas filter according to an embodiment of this application.

[0027] Figure 2 A partial enlarged view of the rinsing device is shown.

[0028] Tank body 100; Air inlet 110; Air outlet 120; Sewage outlet 130; Manhole 140; Filter element 200; Flange assembly 210; Nozzle 310; Water distribution pipe 320; Spray bar 330; Bearing 410; Rotary joint 420; Water inlet pipe 500; Connecting part 510; Pressure sensor 610; Level gauge 620; Solenoid valve 630; Drain valve 640; Cover 710; First mounting part 720; Second mounting part 730; Boiler feed pump 800. Detailed Implementation

[0029] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0030] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or 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 this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0033] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0034] This application discloses a combustible gas filter suitable for installation on pipelines conveying combustible gases, such as... Figure 1 , Figure 2As shown, the system includes: a tank 100, a filter element 200, a flushing device, a rotating device, and a water inlet pipe 500; the tank 100 has an air inlet 110 and an air outlet 120, one end of the filter element 200 is located at the air outlet 120, and the filter element 200 is located inside the cavity of the tank 100; the flushing device is arranged around the filter element 200 and is rotatably mounted inside the cavity of the tank 100; the rotating device is located at the end of the tank 100 opposite to the air outlet 120, and the rotating device is suitable for connecting to a boiler feedwater pump 800. One end of the water inlet pipe 500 is connected to the rotating device, and the other end of the water inlet pipe 500 extends into the cavity of the tank 100 and communicates with the flushing device; the tank 100 is provided with a drain port 130, which is located opposite to the air inlet 110; the flushing device is provided with a nozzle 310, and the water spraying direction of the nozzle 310 is at a preset angle α with the length direction of the filter element 200, so that the reaction force generated by the nozzle 310 when flushing the filter element 200 drives the flushing device to rotate around the axis of the filter element 200.

[0035] It should be noted that the combustible gas filter of this application is installed at a suitable position in the delivery pipeline via a flange structure or other suitable connection method, so that the combustible gas enters the tank 100 through the inlet 110, is filtered by the filter element 200, and flows out from the outlet 120. The tank 100 is designed to provide a closed environment for the entire filtration process, preventing the combustible gas from leaking into the external environment during filtration, and preventing external impurities from entering the tank 100. The filter element 200 is designed to filter fine particulate matter in the combustible gas, thereby ensuring that subsequent equipment can use clean combustible gas and reducing the risk of wear and blockage caused by impurities. The rinsing device is designed to be rotatable and surrounds the filter element 200, which can uniformly rinse the filter element 200, improve the rinsing effect, avoid insufficient rinsing in some areas, and extend the service life of the filter element 200.

[0036] The inlet pipe 500 is used to transport pressurized water supplied by the boiler feed pump 800 to the flushing device to ensure that the water pressure meets the flushing intensity requirements. The rotating device is used to connect the inlet end of the inlet pipe 500 to the boiler feed pump 800. The rotating device ensures that high-pressure water flows into the inlet pipe 500 while allowing the inlet pipe 500 to rotate synchronously with the flushing device. The design of the preset angle α makes the water spray direction of the nozzle 310 form a certain impact angle with the surface of the filter element 200. The impact force of the water flow on the filter element 200 generates a reaction force to drive the flushing device to rotate around the axis of the filter element 200. This achieves full circumferential cleaning of the filter element 200. The drain port 130 is set opposite to the air inlet 110 and is located below the tank 100. The drain port 130 is used to discharge the sewage generated during flushing into the tank 100.

[0037] Combustible gas is delivered to tank 100 through inlet 110 via a pipeline. The gas flows within tank 100, and as it passes through filter element 200, fine particulate matter is intercepted, thus filtering the gas. The filtered gas flows out through outlet 120 and continues to flow to subsequent equipment, ensuring stable operation. When filter element 200 needs rinsing, there is no need to stop the entire pipeline and connected equipment; the boiler can be started immediately. The feed water pump 800 and the boiler feed water pump 800 deliver high-pressure water to the flushing device through the inlet pipe 500. The high-pressure water is sprayed from the nozzle 310 on the flushing device at a specific angle to impact the surface of the filter element 200. The reaction force generated when the nozzle 310 sprays water drives the flushing device to rotate around the axis of the filter element 200. During the rotation of the flushing device, the nozzle 310 continuously flushes the filter element 200 in a full circumference, thereby effectively removing impurities from the surface of the filter element 200. The flushed wastewater can be discharged through the drain port 130.

[0038] This application incorporates a rinsing device. The rinsing device utilizes the reaction force generated by the water sprayed from the nozzle 310 to rotate around the axis of the filter element 200, thus achieving full circumferential rinsing of the filter element 200. This improves rinsing effect and efficiency, extends the service life of the filter element 200, and the rinsing device achieves automatic rotation solely through the reaction force of the high-pressure water jet from the nozzle 310, requiring no additional power. Compared to traditional manual methods using high-pressure water guns or brushes, this application's combustible gas filter allows for cleaning of the filter element 200 at any time without manual opening, reducing labor intensity and preventing the shutdown of the entire pipeline due to cleaning operations. This minimizes inconvenience to residents and economic losses for industrial users caused by production stoppages.

[0039] In one possible implementation, the water inlet pipe 500 is coaxially arranged with the filter element 200. This coaxial arrangement ensures that when the rinsing device rotates, the nozzle 310 can uniformly rinse the filter element 200 at the same distance and angle with the filter element 200 axis as the center, thus avoiding over-rinsing or under-rinsing of the filter element 200 due to eccentricity.

[0040] In one possible implementation, the main body of the rinsing device has a U-shaped structure. The U-shaped structure design allows the nozzles 310 on the rinsing device to be symmetrically distributed on both sides of the filter element 200 to perform rinsing operations on the filter element 200, thereby improving the rinsing effect, avoiding insufficient rinsing in certain areas, and extending the service life of the filter element 200.

[0041] In one possible implementation, the preset angle α is in the range of 60°–70°. A suitable preset angle α ensures that when the water jet from the nozzle 310 impacts the surface of the filter element 200 at a suitable angle, it can generate sufficient pressure to flush away impurities attached to the filter element 200. At the same time, the reaction force generated by the water jet from the nozzle 310 can provide sufficient power to drive the flushing device to rotate, thus avoiding the situation where the reaction force generated by the water jet from the nozzle 310 is too small to drive the flushing device due to a large or small angle.

[0042] Preferably, the preset angle α is 65°.

[0043] In one possible implementation, the flushing device includes a water distribution pipe 320 and two parallel spray bars 330; the two spray bars 330 are disposed opposite to each other at both ends of the water distribution pipe 320 and are connected to the water distribution pipe 320, and the nozzle 310 is disposed on the spray bar 330; the water inlet pipe 500 is connected to the water distribution pipe 320.

[0044] It should be noted that the main body of the water distribution pipe 320 has a T-shaped structure. The water distribution pipe 320 includes an inlet end and two outlet ends, and the two outlet ends are equidistant from the inlet end. The outlet end of the inlet pipe 500 is connected to the inlet end of the water distribution pipe 320. The two spray bars 330 are respectively connected to the outlets at both ends of the water distribution pipe 320. The water distribution pipe 320 is used to evenly distribute the high-pressure water delivered by the inlet pipe 500 to the two spray bars 330, ensuring that the rinsing intensity on both sides of the filter element 200 is consistent. The length direction of the two spray bars 330 is parallel to the axis of the filter element 200. The spray rods 330 are parallel to each other and located on both sides of the filter element 200, with a certain distance between them and the filter element 200. This ensures that the water flow from the spray nozzles 310 maintains sufficient impact force when it reaches the surface of the filter element 200, enough to remove impurities adhering to the filter element 200. The spray nozzles 310 on both sides simultaneously rinse the filter element 200. Since the two spray rods 330 are symmetrically distributed on both sides of the filter element 200 and the water volume is balanced, the reaction forces generated by the spray nozzles 310 on both sides are equal in magnitude and symmetrical in direction, avoiding eccentric rotation of the rinsing device due to excessive reaction force on one side.

[0045] Furthermore, the outlet end of the water inlet pipe 500 and the inlet end of the water distribution pipe 320 are detachably connected through the connecting part 510. Both the outlet end of the water inlet pipe 500 and the inlet end of the water distribution pipe 320 are provided with external threads. The connecting part 510 is a hollow cavity structure, and both ends are provided with internal threads. The water inlet pipe 500 and the water distribution pipe 320 are respectively threadedly connected to the connecting part 510.

[0046] In one possible implementation, there are two or more nozzles 310, which are spaced apart along the length of the spray bar 330. The design of multiple nozzles 310 can ensure that the rinsing water can cover the entire surface of the filter element 200, so that all parts of the filter element 200 can be fully rinsed, further improving the rinsing effect of the filter element 200 and shortening the rinsing time.

[0047] Furthermore, two or more nozzles 310 are set at equal intervals.

[0048] In one possible implementation, the nozzle 310 may be a fan-shaped or cone-shaped nozzle 310 as in the prior art, so that the water sprayed by the nozzle 310 fully covers the filter element 200, thereby expanding the rinsing range of the nozzle 310.

[0049] In one possible implementation, the rotating device includes a bearing 410 and a rotary joint 420; the bearing 410 is fixedly mounted on the tank 100, and the water inlet pipe 500 is rotatably mounted inside the bearing 410, with one end of the water inlet pipe 500 connected to the rinsing device and the other end of the water inlet pipe 500 connected to the rotary joint 420.

[0050] It should be noted that bearing 410 is used to provide stable rotational support for water inlet pipe 500, ensuring that water inlet pipe 500 and filter element 200 are always coaxial, while reducing frictional loss when water inlet pipe 500 rotates; bearing 410 includes an inner ring, an outer ring, a rolling element, and two seals; the outer ring of bearing 410 is fixedly mounted on tank 100 and communicates with the cavity of tank 100, the inner ring is fitted inside the cavity of the outer ring and is coaxially arranged, the rolling element is arranged between the outer ring and the inner ring, and the two seals are arranged between the outer ring and the inner ring, respectively located on both sides of the rolling element. The water inlet pipe 500 is set in the inner ring of the bearing 410, and the water inlet pipe 500 is fixedly and sealed to the inner ring. The design of the bearing 410 can reduce the resistance when the water inlet pipe 500 rotates. This allows the flushing device to rotate easily by relying only on the reaction force of the water sprayed by the nozzle 310, without the need for additional power. The rotary joint 420 enables the water inlet pipe 500 to rotate while achieving a sealed connection with the boiler feed water pump 800. This not only achieves water flow between the boiler feed water pump 800 and the water inlet pipe 500, but also avoids motion interference between the water inlet pipe 500 and the boiler feed water pump 800 when the water inlet pipe 500 rotates.

[0051] Furthermore, the bearing 410 is an SKF631 sealed bearing of the increased safety type, and the rotary joint 420 is a DN100 universal swivel joint. Therefore, the specific structure and working principle of the bearing 410 and the rotary joint 420 are well known technologies in this field, and those skilled in the art can obtain their complete technical information through public channels. They will not be described in detail here.

[0052] In one possible implementation, a flange assembly 210 is also included; the filter element 200 is detachably mounted at the outlet 120 via the flange assembly 210. It should be noted that the flange assembly 210 is designed to allow the filter element 200 to be detachably mounted at the outlet 120, preventing flammable gas leakage between the filter element 200 and the outlet 120. The flange assembly 210 includes a first flange and a second flange. The first flange is fixedly mounted at the outlet 120, and the second flange is fixedly mounted at one end of the filter element 200. Both the first and second flanges are hollow annular structures, and the first and second flanges are connected by bolts, thereby mounting the filter element 200 at the outlet 120.

[0053] In one possible implementation, the main body of the filter element 200 is cylindrical; the side wall of the filter element 200 has two or more filter holes, which are arranged in an array along the length of the filter element 200.

[0054] In one possible implementation, pressure sensors 610 are provided at both the air inlet 110 and the air outlet 120; the pressure sensors 610 are suitable for monitoring the pressure at the air inlet 110 and the air outlet 120 of the tank 100.

[0055] In one possible implementation, a control module is also included. A solenoid valve 630 is provided between the boiler feed pump 800 and the rotating device. The control module is electrically connected to the pressure sensor 610 at the air inlet 110 and the air outlet 120 of the tank 100, and the solenoid valve 630, respectively. The control module can open or close the solenoid valve 630 based on whether the difference between the pressure value at the air inlet 110 and the pressure value at the air outlet 120 meets a preset differential pressure threshold. Specifically:

[0056] When the pressure difference between the inlet 110 and outlet 120 detected by pressure sensor 610 is greater than the preset differential pressure threshold, it indicates that the filter element 200 may be clogged. At this time, the control module controls the solenoid valve 630 to open, and the boiler feed water pump 800 delivers high-pressure water to the flushing device through the inlet pipe 500 so that the flushing device can flush the filter element 200 in the whole circumference. When the pressure difference between the inlet 110 and outlet 120 is less than the preset differential pressure threshold, it indicates that the filter element 200 is in normal condition, and the control module controls the solenoid valve 630 to close.

[0057] The preset differential pressure range is 0.5 kPa to 1 kPa.

[0058] Furthermore, when the flushing device is in operation, if the pressure difference between the inlet 110 and the outlet 120 is less than 0.5 kPa, the control module controls the solenoid valve 630 to close so that the flushing device stops flushing the filter element 200. When the flushing device is in standby mode, if the pressure difference between the inlet 110 and the outlet 120 is greater than 1 kPa, the control module controls the solenoid valve 630 to open so that the flushing device enters the operation mode to flush the filter element 200.

[0059] Furthermore, the solenoid valve 630 can also be manually opened or closed according to on-site requirements. Manually opening or closing the solenoid valve 630 is a well-known technology in the field and will not be described in detail here.

[0060] In one possible implementation, the control module is an existing programmable logic controller.

[0061] In one possible implementation, the pressure sensor 610 is designated as the Wamron WML-802 0-10Kpa pressure sensor 610.

[0062] Furthermore, the model number of solenoid valve 630 is 2W-500-50, a normally closed explosion-proof solenoid valve 630.

[0063] In one possible implementation, a level gauge 620 is also included; the level gauge 620 is arranged adjacent to the drain outlet 130. It should be noted that a mounting hole is provided on one side of the tank 100, and the mounting hole is arranged adjacent to the drain outlet 130. The level gauge 620 is installed at the mounting hole, and the detection end of the level gauge 620 extends into the tank 100. The level gauge 620 is suitable for detecting the sewage level inside the tank 100.

[0064] Furthermore, a drain valve 640 is installed at the sewage outlet 130. Both the drain valve 640 and the level gauge 620 are connected to the control module. The control module can open and close the drain valve 640 based on whether the water level data detected by the level gauge 620 meets a preset value. Specifically:

[0065] When the data detected by the level gauge 620 is greater than the preset value, the control module opens the drain valve 640 to allow the sewage in the tank 100 to be discharged from the drain port 130. When the data detected by the level gauge 620 is less than the preset value, the control module closes the drain valve 640, and the drain port 130 is closed and no sewage is discharged.

[0066] The preset value ranges from 0cm to 20cm; preferably, the preset value ranges from 5cm to 15cm.

[0067] Furthermore, when the drain outlet 130 is closed and the water level detected by the level gauge 620 is greater than 15cm, the control module controls the drain valve 640 to open the drain outlet 130 to discharge the sewage in the tank 100. When the water level detected by the level gauge 620 is less than 5cm, the control module controls the drain valve 640 to close the drain outlet 130.

[0068] In one possible implementation, the level gauge 620 is designated as APS-3, an explosion-proof electrode level gauge.

[0069] In one possible implementation, the tank 100 is provided with a maintenance manhole 140; the maintenance manhole 140 is designed to facilitate the maintenance and debugging of equipment inside the tank 100 and the cleaning of flushing wastewater inside the tank 100 by personnel through the maintenance manhole 140.

[0070] In one possible implementation, one end of the tank 100 is provided with a cover 710 for opening or closing the tank 100, and the end of the tank 100 opposite to the air outlet 120 is provided with an opening. A first mounting part 720 is fixedly disposed at the opening of the tank 100. Correspondingly, a second mounting part 730 is provided on the cover 710. The second mounting part 730 is adapted to the first mounting part 720. The first mounting part 720 and the second mounting part 730 are locked together by bolts to seal the cover 710 at the opening of the tank 100.

[0071] Furthermore, both the maintenance manhole 140 and the bearing 410 are mounted on the cover 710, and the maintenance manhole 140 and the bearing 410 are arranged adjacent to each other.

[0072] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A combustible gas filter, suitable for installation on a pipeline conveying combustible gas, characterized in that, include: Tank body, filter element, flushing device, rotating device, and inlet pipe; The tank body is provided with an air inlet and an air outlet, one end of the filter element is located at the air outlet, and the filter element is located inside the cavity of the tank body; The rinsing device is arranged around the filter element and is rotatably disposed within the cavity of the tank. The rotating device is located at the end of the tank body away from the air outlet. The rotating device is suitable for connecting to a boiler feed water pump. One end of the water inlet pipe is connected to the rotating device, and the other end of the water inlet pipe extends into the cavity of the tank body and communicates with the flushing device. The tank body is provided with a drain port, which is located at a different position from the air inlet. The rinsing device is equipped with a nozzle, and the spray direction of the nozzle is at a preset angle to the length direction of the filter element, so that the reaction force generated when the nozzle rinses the filter element drives the rinsing device to rotate around the axis of the filter element.

2. The combustible gas filter according to claim 1, characterized in that, The preset angle ranges from 60° to 70°.

3. The combustible gas filter according to claim 1, characterized in that, The flushing device includes a water distribution pipe and two parallel spray bars. The two spray bars are disposed opposite to each other at both ends of the water distribution pipe and are connected to the water distribution pipe, and the spray head is disposed on the spray bar; The water inlet pipe is connected to the water distribution pipe.

4. The combustible gas filter according to claim 3, characterized in that, The nozzle is provided in two or more parts, and the two or more nozzles are spaced apart along the length of the spray bar.

5. The combustible gas filter according to claim 1, characterized in that, The rotating device includes a bearing and a rotary joint; The bearing is fixedly mounted on the tank body, and the water inlet pipe is rotatably mounted inside the bearing. One end of the water inlet pipe is connected to the flushing device, and the other end of the water inlet pipe is connected to the rotary joint.

6. The combustible gas filter according to claim 1, characterized in that, It also includes flange assemblies; The filter element is detachably mounted at the air outlet via the flange assembly.

7. The combustible gas filter according to claim 1, characterized in that, The main body of the filter element is cylindrical; the side wall of the filter element has two or more filter holes, and the two or more filter holes are arranged in an array along the length of the filter element.

8. The combustible gas filter according to claim 1, characterized in that, Pressure sensors are installed at both the air inlet and the air outlet.

9. The combustible gas filter according to claim 1, characterized in that, It also includes level gauges; The level gauge is installed adjacent to the drain outlet.

10. The combustible gas filter according to claim 1, characterized in that, The tank is equipped with a maintenance manhole.

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