Filter device, detection equipment and filter element purging method

Abstract

The embodiment of the invention relates to the technical field of coal gas sampling and filtering devices, in particular to a filtering device, detection equipment and a filter element purging method.The filtering device comprises a pipe fitting, a filter element, a first pipeline and a second pipeline, one end of the pipe fitting is closed, the other end of the pipe fitting is used for sample introduction, the filter element is arranged in the pipe fitting, and the first pipeline is communicated with the interior of the filter element; the first pipeline is used for sampling or conveying purging gas, one end of the second pipeline is communicated with the interior of the filter element, the other end of the second pipeline is communicated with the pipe fitting, and a control valve is arranged on the second pipeline. When the filter element needs to be purged, purge gas is conveyed through the first pipeline and enters the filter element through the first pipeline, and after the filter element is purged, the purge gas carries impurities such as pulverized coal and enters the pipe fitting through the second pipeline, so that back flushing of the filter element is realized, the blockage degree of the filter element can be effectively reduced, and the service life of the filter element is prolonged. And the frequency of cleaning the filter element in the sampling process is effectively reduced.

Description

Technical Field

[0001] This application relates to the technical field of gas sampling and filtration devices, and particularly to filtration devices, testing equipment, and filter element purging methods. Background Technology

[0002] In blast furnace pulverized coal injection systems, if the concentration of gases such as oxygen or carbon monoxide exceeds the standard during coal grinding, conveying, and storage, it can easily lead to combustion or even explosion accidents. Therefore, online gas analyzers are needed to monitor the gas composition of the blast furnace pulverized coal injection system. An online gas analyzer is an instrument that uses magnetic oxygen technology to detect gas composition. It can monitor the concentration of oxygen or carbon monoxide in key locations such as the pulverizer inlet, baghouse dust collector outlet, and pulverized coal silo in real time. Once the concentration exceeds the safety threshold, the system will automatically alarm or trigger safety measures such as nitrogen purging to effectively prevent accidents.

[0003] The sample gas in a blast furnace pulverized coal injection system typically contains a large amount of impurities such as dust and coal dust particles. If these impurities directly enter the analyzer, they can contaminate or clog key components such as detectors and optical elements, leading to distorted measurement results or instrument damage. Existing online gas analyzers usually incorporate sampling and filtering devices to filter dust or coal dust particles, reducing the impact of impurities on the aging, corrosion, or clogging of components such as acceleration sensors, optical windows, and detection cells in the online gas analyzer.

[0004] Existing sampling and filtration devices have the following main drawbacks: The existing sampling and filtration device uses a cylindrical filter element with a flange at the top and a bottom cover at the bottom. The bottom cover is solid. During sampling, when the sample gas enters from the sampling probe, it comes in through the cylinder on the side. Coal dust easily accumulates on the bottom cover. If there is coal dust accumulation inside the filter element, it will also cause the sample gas from subsequent equipment to become turbid, increasing maintenance work significantly. During filter backflushing, the purging air enters the filter element and exits from the side. Due to potential blockages in the filter element, coal dust will accumulate on the bottom cover, limiting the cleaning effect of the purging. Furthermore, the coal dust accumulates more and more inside the filter element, eventually filling the entire filter element and exacerbating the blockage. This can even lead to frequent disassembly of the filtration device for cleaning the filter element during a single sampling process, preventing the sampling work from proceeding normally. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, a first aspect of the present invention provides a filtration device.

[0008] A second aspect of the present invention provides a detection device.

[0009] A third aspect of the present invention provides a filter cartridge purging method.

[0010] In view of this, a filtering device is provided according to a first aspect of the embodiments of this application, comprising: A tubular fitting, one end of which is closed and the other end is used for sample injection; A filter element, wherein the filter element is disposed within the pipe fitting; The first pipeline is connected to the interior of the filter element and is used for sampling or delivering purge gas. The second pipeline has one end connected to the interior of the filter element and the other end connected to the pipe fitting. A control valve is installed on the second pipeline, which is used to deliver purge air from the interior of the filter element to the pipe fitting.

[0011] In one feasible implementation, the filter element includes: A first filter element, the first filter element having a cylindrical outer profile; A filter element connection part is used to connect the filter element and the tubing to close the first end of the first filter element.

[0012] In one feasible implementation, the filter element further includes: A second filter element is connected to a second end of the first filter element to close the second end of the first filter element. The second filter element has an arc-shaped outline.

[0013] In one feasible implementation, a first valve is provided on the first pipeline, and the control valve includes a second valve and a third valve, which are sequentially arranged on the second pipeline.

[0014] In one feasible implementation, the filtration device further includes: A third pipeline is used to supply purging gas to the first pipeline; A fourth pipeline, which connects the third pipeline and the first pipeline, is equipped with a fourth valve.

[0015] In one feasible implementation, the filtration device further includes: A fifth pipeline, which connects the third pipeline and the second pipeline, and the connection point is located between the second valve and the third valve, and a fifth valve is provided on the fifth pipeline; The first valve is located between the third pipeline and the filter element.

[0016] According to a second aspect of the embodiments of this application, a detection device is provided, the detection device including a filtering device as described in any of the above technical solutions, the detection device further including: The probe rod is connected to the pipe fitting.

[0017] A filter cartridge purging method is provided according to a third aspect of the embodiments of this application, applied to a filtration device or testing equipment as described in any of the above technical solutions. The filter cartridge purging method includes backflushing the filter cartridge, and the backflushing method includes: Purge gas is supplied to the first pipeline; The purging gas enters the filter element through the first pipeline to purge the interior of the filter element; After purging, the purging gas is discharged from the second pipeline and delivered into the pipe fitting.

[0018] In one feasible implementation, the filter element purging method further includes purging the probe rod, the method of purging the probe rod comprising: Purge gas is supplied to the second pipeline; Close the end of the second pipeline that connects to the filter element, and open the end of the second pipeline that connects to the fitting. The purging gas enters the pipe through the second pipeline to purge the interior of the pipe.

[0019] In one feasible implementation, the filter element purging method further includes purging the filter element layer, the method comprising: Purge gas is simultaneously supplied to the first pipeline and the second pipeline; Open one end of the second pipeline that connects to the filter element, and close the other end of the second pipeline that connects to the fitting; The purging gas enters the filter element simultaneously through the first pipeline and the second pipeline; The purging gas enters the pipe through the filter element layer of the filter element to purge the filter element layer.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: The filtration device provided in this embodiment includes a pipe fitting, a filter element, a first pipeline, and a second pipeline. One end of the pipe fitting is closed, and the other end is used for sample introduction. The filter element is disposed inside the pipe fitting. The first pipeline is connected to the interior of the filter element and is used for sampling or conveying purge gas. One end of the second pipeline is connected to the interior of the filter element, and the other end is connected to the pipe fitting. A control valve is installed on the second pipeline, which is used to convey purge gas from the interior of the filter element to the interior of the pipe fitting. When the filter element needs to be purged, the control valve on the second pipeline is opened, and purge gas is conveyed through the first pipeline. The purge gas enters the filter element through the first pipeline. After purging the filter element, the purge gas is discharged from the filter element through the second pipeline. Since the second pipeline is connected to the pipe fitting, the purge gas carries impurities such as coal dust into the pipe fitting, achieving backflushing of the filter element. The backflushed purge gas is discharged through the second pipeline, which can effectively reduce the degree of filter element blockage and effectively reduce the frequency of cleaning the filter element during sampling, and also greatly improve the efficiency of sampling work.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic structural diagram of the filtering device according to the first embodiment of this application; Figure 2 A schematic diagram of the gas path of the filtration device provided in this application under conventional sampling mode; Figure 3 A schematic structural diagram of the filtering device according to the second embodiment provided in this application; Figure 4 A schematic diagram of the gas path of the filtration device provided in this application in filter cartridge backflushing mode; Figure 5 A schematic structural diagram of the filtering device according to the third embodiment provided in this application; Figure 6 A schematic diagram of the gas path of the filtration device provided in this application in probe purging mode; Figure 7 A schematic diagram of the gas path of the filtration device provided in this application in the filter layer cleaning mode; Figure 8A schematic diagram of the gas path of the filtration device provided in this application under unconventional sampling mode; Figure 9 A schematic flowchart illustrating the steps of a filter cartridge backflushing mode in an embodiment of the filter cartridge purging method provided in this application; Figure 10 A schematic flowchart illustrating the probe purging mode of a filter cartridge purging method according to an embodiment of this application; Figure 11 This is a schematic flowchart illustrating the filter layer purification mode of a filter purging method according to an embodiment of this application.

[0023] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows: 10 First pipeline, 20 Second pipeline, 30 Third pipeline, 40 Fourth pipeline, 50 Fifth pipeline, 60 Filter element, 70 Pipe fitting, 80 Probe, 90 Welded end flange, 100 Cabinet structure, 110 Filter element end flange; 11 First valve, 21 Second valve, 22 Third valve, 41 Fourth valve, 51 Fifth valve, 61 Filter element connection, 62 First filter element, 63 Second filter element, 71 Sampling valve. Detailed Implementation

[0024] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0026] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0027] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0028] like Figures 1 to 8 As shown, a filtration device is provided according to a first aspect of the embodiments of this application, including a tube 70, a filter element 60, a first pipeline 10, and a second pipeline 20. One end of the tube 70 is closed, and the other end is used for sample injection. The filter element 60 is disposed inside the tube 70. The first pipeline 10 is in communication with the interior of the filter element 60 and is used for sampling or conveying purge gas. One end of the second pipeline 20 is in communication with the interior of the filter element 60, and the other end is in communication with the tube 70. A control valve is provided on the second pipeline 20, and the second pipeline 20 is used to convey purge gas from the interior of the filter element 60 to the tube 70.

[0029] like Figure 1 As shown and Figure 2 As shown, in this technical solution, under normal sampling mode, the control valve on the second pipeline 20 is closed, and the sample enters the pipe fitting 70 from the lower end, is filtered by the filter element 60, and then outputs through the first pipeline 10. Figure 4 As shown, in the filter element backflush mode, the control valve on the second pipeline 20 is opened, and the purge air enters the filter element 60 from the first pipeline 10 to purge the filter element 60. After purging, the purge air is discharged from the second pipeline 20 and discharged into the fitting 70 through the second pipeline 20, thus completing the backflush of the filter element 60.

[0030] like Figure 1 As shown, in one feasible embodiment, the filter element 60 includes a first filter element 62 and a filter element connecting portion 61. The first filter element 62 has a cylindrical outer profile. The filter element connecting portion 61 is used to connect the filter element 60 and the tube 70 so that the first end of the first filter element 62 is closed.

[0031] In this technical solution, a sampling primary valve 71 is provided on the pipe fitting 70. The sampling primary valve 71 is opened during sampling or purging. A filter element end flange 110 is provided at one end of the pipe fitting 70. The filter element end flange 110 is used to close one end of the pipe fitting 70. The filter element connection part 61 has an external thread, and the filter element end flange 110 has an internal thread that matches the external thread. The filter element connection part 61 is threadedly connected to the filter element end flange 110 to close the first end of the filter element 60.

[0032] like Figure 1As shown, in one feasible embodiment, the filter element 60 further includes a second filter element 63, which is connected to the second end of the first filter element 62 so that the second end of the first filter element 62 is closed, and the second filter element 63 has an arc-shaped outline.

[0033] Understandably, in this technical solution, the first filter element 62 of the filter element 60 has a cylindrical outer contour, and the second filter element 63 has an arc-shaped outer contour. The first filter element 62 and the second filter element 63 are integrally connected to form a U-shaped filter element 60, which enhances the contact surface of the sample gas, thereby making it more convenient to sample the gas. The U-shaped filter element 60 is formed by an integrated process, with a U-shaped design at the bottom. The first pipeline 10 and the second pipeline 20 connected to the top of the filter element 60 realize the filter element backflushing mode, and the coal powder inside the filter element 60 can be effectively discharged through the second pipeline 20.

[0034] like Figure 1 As shown, in one feasible embodiment, a first valve 11 is provided on the first pipeline 10, and the control valve includes a second valve 21 and a third valve 22, which are sequentially provided on the second pipeline 20.

[0035] It is understood that in this technical solution, the opening and closing of the first pipeline 10 is controlled by the first valve 11, and the opening and closing of the second pipeline 20 is controlled by the second valve 21 and the third valve 22.

[0036] like Figure 3 As shown, in one feasible embodiment, the filtration device further includes a third pipeline 30 and a fourth pipeline 40, the third pipeline 30 being used to supply purge gas to the first pipeline 10; the fourth pipeline 40 connecting the third pipeline 30 and the first pipeline 10, and a fourth valve 41 being provided on the fourth pipeline 40.

[0037] like Figure 4 As shown, it can be understood that the purge gas is delivered by setting the third pipeline 30, and the third pipeline 30 delivers the purge gas to the first pipeline 10 to achieve backflushing of the filter element 60.

[0038] like Figure 5 As shown, in one feasible embodiment, the filtration device further includes a fifth pipeline 50, which connects to the third pipeline 30 and the second pipeline 20, and the connection position is located between the second valve 21 and the third valve 22. A fifth valve 51 is provided on the fifth pipeline 50; wherein, the first valve 11 is located between the third pipeline 30 and the filter element 60.

[0039] like Figure 6As shown, it can be understood that in this technical solution, the third pipeline 30 and the second pipeline 20 are connected through the fifth pipeline 50. After the filter element 60 is backflushed, the probe purging mode is started. The fifth valve 51 and the third valve 22 are opened, and the first valve 11, the second valve 21 and the fourth valve 41 are closed. The purging gas delivered by the third pipeline 30 passes through the fifth valve 51 and the third valve 22 in sequence and is delivered into the pipe 70, purging the coal powder blown into the pipe 70 during the backflushing of the filter element 60 into the tested pipeline.

[0040] like Figure 7 As shown, in this technical solution, by opening and closing the valves, after the probe purging mode, the filter layer purification mode can be performed. Specifically, the first valve 11, the second valve 21, the fourth valve 41, and the fifth valve 51 are opened, and the third valve 22 is closed. The purging gas is delivered from the third pipeline 30. One path passes through the fourth valve 41 and the first valve 11 into the filter element 60, and the other path passes through the fifth valve 51 and the second valve 21 into the filter element 60. The two purging gas paths enter the filter element 60 simultaneously, purging the filter layer. After purging the filter layer, the gas is discharged from the filter layer into the pipe 70, which can purge the residual coal powder into the tested pipeline.

[0041] like Figure 8 As shown, in this technical solution, an unconventional sampling mode can be achieved by opening and closing the valves. Specifically, the first valve 11 and the second valve 21 are closed, and the third valve 22, the fourth valve 41 and the fifth valve 51 are opened. After the sample gas enters the pipe 70, it does not exit through the filter element 60, but passes through the third valve 22, the fifth valve 51 and the fourth valve 41 in sequence, and is output from the first pipeline 10.

[0042] like Figures 1 to 8 As shown, a detection device is proposed according to a second aspect of the embodiments of this application. The detection device includes a filter device as described in any of the above technical solutions. The detection device also includes a probe 80, which is connected to a pipe fitting 70. It also includes a switchable cabinet structure 100. The pipe fitting 70 is disposed inside the cabinet structure 100. Both ends of the cabinet structure 100 have clearance holes that allow the pipe fitting 70 to communicate with the outside. Bolt fixing holes are provided on the cabinet structure 100. A filter element end flange 110 is bolted to one of the clearance holes. The filter element connecting part 61 of the filter element 60 is threadedly connected to the filter element end flange 110. The filter element end flange 110 has three vent holes. One vent hole connects the first pipeline 10 and the filter element 60. Another vent hole connects the filter element 60 to one end of the second pipeline 20. The other end of the second pipeline 20 is connected to a vent hole on the filter element end flange 110 that communicates with the pipe fitting 70.

[0043] The detection device provided in this application embodiment includes the filtration device of the above-described technical solution, and therefore possesses all the beneficial effects of the filtration device of the above-described technical solution.

[0044] Understandably, in this technical solution, the probe 80 is positioned at the end of the pipe fitting 70 away from the filter element 60, and the probe 80 and pipe fitting 70 are fixedly connected, with a gasket placed between them. A welded end flange 90 is typically installed on the pipe being tested, and is welded to it. Before testing, the probe 80 is inserted into the pipe being tested through the welded end flange 90, and the welded end flange 90 is connected to the cabinet structure 100 using bolts.

[0045] The first valve 11, the second valve 21, the third valve 22, the fourth valve 41, and the fifth valve 51 can all be selected to use solenoid valves. The solenoid valves are program-controlled and can be automatically or manually switched between conventional sampling mode, filter backflushing mode, probe purging mode, and unconventional sampling mode.

[0046] like Figure 9 As shown, a filter element purging method is proposed according to a third aspect of the embodiments of this application, applied to a filtration device or testing equipment as described in any of the above technical solutions. The filter element purging method includes backflushing the filter element 60, i.e., a filter element backflushing mode. The method for backflushing the filter element 60 includes: Step 201: Supply purging gas to the first pipeline 10; Step 202: The purging air enters the filter element 60 through the first pipeline 10 to purge the inside of the filter element 60; Step 203: The purging gas after purging is discharged from the second pipeline 20 and delivered into the fitting 70.

[0047] The filter cartridge purging method provided in this application embodiment, since it is applied to the filtration device or testing equipment of any of the above technical solutions, therefore the filter cartridge purging method has all the beneficial effects of the filtration device or testing equipment of the above technical solutions.

[0048] like Figure 4 and Figure 9 As shown, in this technical solution, when the filter element backflushing mode is started, the first valve 11, the second valve 21 and the third valve 22 are opened, while the remaining valves are kept closed. The purging gas enters the filter element 60 through the first valve 11 to purge the coal powder accumulated inside the filter element 60. The coal powder is then purged into the pipe 70 through the second valve 21 and the third valve 22 on the second pipeline 20, thus purging and emptying the coal powder inside the filter element 60.

[0049] like Figure 6 and Figure 10As shown, in one feasible embodiment, the filter element purging method further includes purging the probe 80, i.e., the probe purging mode. The method for purging the probe 80 includes: Step 301: Supply purging gas to the second pipeline 20; Step 302: Close the end of the second pipeline 20 that connects to the filter element 60, and open the end of the second pipeline 20 that connects to the fitting 70; Step 303: Purge air enters the fitting 70 through the second pipeline 20 to purge the interior of the fitting 70.

[0050] In this technical solution, when the probe purging mode is started, the fifth valve 51 and the third valve 22 are opened while the other valves are kept closed. The purging gas is delivered from the third pipeline 30, passes through the fifth valve 51 and the third valve 22 in sequence, and enters the interior of the pipe fitting 70, purging the coal powder in the pipe fitting 70 and the probe 80 into the pipeline being tested.

[0051] like Figure 7 and Figure 11 As shown, in one feasible embodiment, the filter element purging method further includes purging the filter element layer, i.e., the filter element layer purification mode, and the method for purging the filter element layer includes: Step 401: Simultaneously deliver purging gas to the first pipeline 10 and the second pipeline 20; Step 402: Open one end of the second pipeline 20 that connects to the filter element 60, and close the other end of the second pipeline 20 that connects to the fitting 70; Step 403: The purging air enters the filter element 60 simultaneously through the first pipeline 10 and the second pipeline 20; Step 404: The purge air enters the fitting 70 through the filter layer of the filter element 60 to purge the filter layer.

[0052] In this technical solution, after the filter element backflushing mode and the probe purging mode, the filter element layer purification mode is started. The first valve 11, the second valve 21, the fourth valve 41 and the fifth valve 51 are opened. The purging gas is input from the third pipeline 30. One path passes through the fourth valve 41 and the first valve 11 into the filter element 60, and the other path passes through the fifth valve 51 and the second valve 21 into the filter element 60. After the two purging gas simultaneously purges and cleans the filter element layer, it enters the pipe 70 through the filter holes of the filter element layer, and finally purges the residual coal powder into the tested pipeline.

[0053] Understandably, during filter element purging, nitrogen is introduced as the purging gas. First, a filter element backflushing mode is activated to purge the coal dust inside filter element 60 into pipe fitting 70 and probe 80. After a period of time, the probe purging mode is activated to purge all the coal dust discharged from filter element 60 into the tested pipeline. After another period of time, a filter element layer purification mode is activated to purge and purify the filter element layer. This procedure is repeated multiple times to clean the voids in filter element 60, ending the filter element purging process. In this scheme, the procedure can be set to repeat three times before ending the filter element purging process and resuming normal sampling.

[0054] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., 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 invention and simplifying the description, and do not indicate or imply that the device or unit 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 invention.

[0056] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present 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.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. 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 filtration device, characterized in that, include: A tubular fitting, one end of which is closed and the other end is used for sample injection; A filter element, wherein the filter element is disposed within the pipe fitting; The first pipeline is connected to the interior of the filter element and is used for sampling or delivering purge gas. The second pipeline has one end connected to the interior of the filter element and the other end connected to the pipe fitting. A control valve is installed on the second pipeline, which is used to deliver purge air from the interior of the filter element to the pipe fitting.

2. The filtration device according to claim 1, characterized in that, The filter element includes: A first filter element, the first filter element having a cylindrical outer profile; A filter element connection part is used to connect the filter element and the tubing to close the first end of the first filter element.

3. The filtration device according to claim 2, characterized in that, The filter element also includes: A second filter element is connected to a second end of the first filter element to close the second end of the first filter element. The second filter element has an arc-shaped outline.

4. The filtration device according to claim 1, characterized in that, A first valve is provided on the first pipeline, and the control valve includes a second valve and a third valve, which are sequentially arranged on the second pipeline.

5. The filtration device according to claim 4, characterized in that, Also includes: A third pipeline is used to supply purging gas to the first pipeline; A fourth pipeline, which connects the third pipeline and the first pipeline, is equipped with a fourth valve.

6. The filtration device according to claim 5, characterized in that, Also includes: A fifth pipeline, which connects the third pipeline and the second pipeline, and the connection point is located between the second valve and the third valve, and a fifth valve is provided on the fifth pipeline; The first valve is located between the third pipeline and the filter element.

7. A testing device, characterized in that, The filtration device as described in any one of claims 1 to 6 further includes: The probe rod is connected to the pipe fitting.

8. A filter cartridge purging method, characterized in that, Applied to the filtration device as described in any one of claims 1 to 6, and / or, The testing equipment as described in claim 7; The filter element purging method includes backflushing the filter element, and the backflushing method includes: Purge gas is supplied to the first pipeline; The purging gas enters the filter element through the first pipeline to purge the interior of the filter element; After purging, the purging gas is discharged from the second pipeline and delivered into the pipe fitting.

9. The filter element purging method according to claim 8, characterized in that, The filter element purging method further includes purging the probe rod, and the method for purging the probe rod includes: Purge gas is supplied to the second pipeline; Close the end of the second pipeline that connects to the filter element, and open the end of the second pipeline that connects to the fitting. The purging gas enters the pipe through the second pipeline to purge the interior of the pipe.

10. The filter element purging method according to claim 9, characterized in that, The filter element purging method further includes purging the filter element layer, and the purging method for the filter element layer includes: Purge gas is simultaneously supplied to the first pipeline and the second pipeline; Open one end of the second pipeline that connects to the filter element, and close the other end of the second pipeline that connects to the fitting; The purging gas enters the filter element simultaneously through the first pipeline and the second pipeline; The purging gas enters the pipe through the filter element layer of the filter element to purge the filter element layer.

Images