Method for operating a filter device and filter device

Abstract

This invention provides a method for operating a filtration device and a filtration device in general. The method includes the following steps: when a detection mechanism detects that the filter needs cleaning, the air inlet and outlet of the filter to be cleaned are closed, the drain outlet of the filter to be cleaned is opened, and a cleaning mechanism blows air into the filter element in the filter to be cleaned. This method can automatically detect whether the filter needs cleaning, and can clean the filter by blowing air into the filter element through the cleaning mechanism to blow powder out from the drain outlet; the equipment maintainer does not need to manually remove and clean the filter element; therefore, this method improves the cleaning efficiency of the filtration device.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a method for operating a filtration device and a filtration device. Background Technology

[0002] In chemical production, it is often necessary to evacuate a container. When a vacuum pump extracts gas from the container, some of the material inside the container or particulate matter mixed with the gas is also extracted along with the gas. To prevent material contamination or damage to the vacuum pump, a filter is usually installed between the container and the vacuum pump. The filter allows gas to pass through while blocking material or other particulate matter.

[0003] After a filter has been running for a period of time, the filter element needs to be cleaned; otherwise, it will become clogged, hindering vacuuming. However, in existing technology, the filter element needs to be manually removed and cleaned, resulting in low cleaning efficiency. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a method for operating a filtration device that can improve the cleaning efficiency of the filter.

[0005] The present invention also provides a filtration device.

[0006] According to an embodiment of the first aspect of the present invention, a method for operating a filtration device is applied to a filtration device, the filtration device including a filter, a detection mechanism, and a cleaning mechanism, the filter including a filter housing and a filter element located inside the filter housing, the method for operating the filtration device including the following steps:

[0007] When the detection mechanism detects that the filter needs cleaning, it closes the air inlet and outlet of the filter to be cleaned, opens the drain outlet of the filter to be cleaned, and the cleaning mechanism blows air into the filter element in the filter to be cleaned to perform cleaning.

[0008] The filtration device operation method according to the first aspect of the present invention has at least the following advantages: Using the operation method of the present invention, it is possible to detect whether the filter needs cleaning, and when it is detected that the filter needs cleaning, a cleaning mechanism can blow air onto the filter element to blow out powder from the drain port, thereby cleaning the filter; the equipment maintainer does not need to manually remove and clean the filter element. Therefore, the operation method of the present invention is beneficial to improving the cleaning efficiency of the filtration device.

[0009] According to some embodiments of the present invention, the filtration device further includes an inlet pipe and an outlet pipe, and multiple filters are provided, with the multiple filters connected in parallel between the inlet pipe and the outlet pipe; the operation method of the filtration device further includes the following steps:

[0010] The filters are partially closed and partially open; when one of the open filters needs cleaning, the closed filter is opened, the filter to be cleaned is closed, and cleaning is performed.

[0011] According to some embodiments of the present invention, the step of the detection agency detecting that the filter needs cleaning includes:

[0012] The actual pressure difference between the air inlet pipe and the air outlet pipe is obtained. If the actual pressure difference exceeds the first preset pressure difference value within a series of preset time units, the detection mechanism determines that the filter in the open state needs to be cleaned.

[0013] According to some embodiments of the present invention, turning on a filter that is in a closed state, turning off the filter that needs to be cleaned, and cleaning it includes:

[0014] After turning on one of the filters that is in the off state, when the actual differential pressure value is less than the second preset differential pressure value, the filter to be cleaned is turned off; wherein, the second preset differential pressure value is less than the first preset differential pressure value.

[0015] According to some embodiments of the present invention, the method further includes the following steps: after one of the filters has been cleaned and restarted, if the actual differential pressure value is less than the first preset differential pressure value and greater than the second preset differential pressure value within a preset interval, the detection mechanism issues an alarm message.

[0016] According to some embodiments of the present invention, the filter further includes a plurality of bypass pipes and a plurality of bypass valves, each bypass pipe being connected to a different filter housing, and both ends of the bypass pipe being connected to the filter housing and the air outlet pipe, respectively, and each bypass pipe being equipped with a bypass valve; opening a filter that is in a closed state includes:

[0017] First, open the bypass valve of the filter, and then open the air inlet and outlet of the filter.

[0018] A filtration device according to an embodiment of a second aspect of the present invention includes: a filter comprising a filter housing, a filter element, an inlet valve, an outlet valve, and a drain valve, the filter housing having a filter chamber, a drain port, an inlet port, and an outlet port, the inlet valve capable of closing or opening the inlet port, the outlet valve capable of closing or opening the outlet port, and the drain valve capable of closing or opening the drain port; a cleaning mechanism capable of blowing air onto the filter element for cleaning; and a detection mechanism capable of detecting whether the filter element needs cleaning, wherein the cleaning mechanism, the inlet valve, the outlet valve, and the drain valve are all communicatively connected to the detection mechanism; the filtration device is configured such that: when the detection mechanism detects that the filter element needs cleaning, the drain valve opens the drain port, the inlet valve closes the inlet port, the outlet valve closes the outlet port, and the cleaning mechanism blows air onto the filter element.

[0019] The filtration device according to a second aspect embodiment of the present invention has at least the following advantages: it can detect whether the filter needs cleaning, and when it is detected that the filter needs cleaning, it can use a cleaning mechanism to blow air onto the filter element to blow powder out from the drain port, thereby cleaning the filter; the equipment maintainer does not need to manually remove and clean the filter element. Therefore, the cleaning efficiency of this filtration device is high.

[0020] According to some embodiments of the present invention, the filtration device further includes an air inlet pipe and an air outlet pipe, both of which are connected to the filter housing, and multiple filters are provided, with the multiple filters connected in parallel between the air inlet pipe and the air outlet pipe.

[0021] According to some embodiments of the present invention, the detection mechanism includes: a first pressure sensor installed in the air inlet pipe and used to detect the air pressure in the air inlet pipe; a second pressure sensor installed in the air outlet pipe and used to detect the air pressure in the air outlet pipe; and a controller, wherein the first pressure sensor and the second pressure sensor are both communicatively connected to the controller, and the controller is used to acquire the pressure difference between the air inlet pipe and the air outlet pipe.

[0022] According to some embodiments of the present invention, the filter further includes a plurality of bypass pipes and a plurality of bypass valves, each bypass pipe being connected to a different filter housing, and both ends of the bypass pipe being connected to the filter housing and the air outlet pipe, respectively, and each bypass pipe being equipped with a bypass valve.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of one state of the filtering device in one embodiment of the present invention (all filters are closed);

[0026] Figure 2 for Figure 1 A schematic diagram of the filter in the image;

[0027] Figure 3 for Figure 1 A schematic diagram of the first filter of the filtration device in the image when it is turned on;

[0028] Figure 4 for Figure 1 A schematic diagram of the filtration device in which both the first and second filters are turned on;

[0029] Figure 5 for Figure 1 A schematic diagram showing the second filter of the filter in the image when it is turned on;

[0030] Figure 6 This is a schematic diagram illustrating the step of alternating operation of multiple filters in an embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the step of detecting whether the filter needs cleaning in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the filter switching step in the operation method of an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the step of opening the filter after cleaning in an embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram illustrating the step of reminding the user to replace the filter element in an embodiment of the present invention.

[0035] Figure label:

[0036] 100-Filter device, 101-Inlet pipe, 102-First pressure sensor, 103-Outlet pipe, 104-Second pressure sensor, 105-First filter, 106-Second filter, 107-Air tank, 108-Air jet valve, 109-Air jet pipe, 110-Cleaning mechanism;

[0037] 200-Filter, 201-Inlet, 202-Inlet valve, 203-Filter element, 204-Filter chamber, 205-Filter housing, 206-Drain valve, 207-Drain outlet, 208-Bypass valve, 209-Bypass pipe, 210-Outlet, 211-Outlet valve. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0040] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0041] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0042] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, media, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, media, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] This invention provides a method for operating a filtration device and a filtration device itself. For ease of description of the method for operating the filtration device (hereinafter referred to as the "operation method"), the filtration device of this invention will be described first. It should be noted that, unless otherwise specified, the phrase "cleaning the filter" (or other similar descriptions) mentioned in this invention refers to cleaning the filter element.

[0044] Reference Figure 1The filtration device 100 of the present invention includes a filter 200, a detection mechanism, and a cleaning mechanism 110, as shown in the figure. Figure 2 The filter 200 includes a filter housing 205, a filter element 203, an inlet valve 202, an outlet valve 211, and a drain valve 206. A detection mechanism is used to detect whether the filter 200 needs cleaning, and a cleaning mechanism 110 is used to clean the filter element 203 of the filter 200.

[0045] Reference Figure 2 The filter housing 205 has a filter chamber 204, an air inlet 201, an air outlet 210, and a drain outlet 207. An air inlet valve 202, an air outlet valve 211, and a drain outlet valve 206 are all connected to the filter housing 205. The air inlet valve 202 can open or close the air inlet 201, the air outlet valve 211 can open or close the air outlet 210, and the drain outlet valve 206 can open or close the drain outlet 207. When the air inlet valve 202 is open, the air inlet 201 is opened, meaning the air inlet 201 is connected to the filter chamber 204. When the air outlet valve 211 is open, the air outlet 210 is opened, meaning the air outlet 210 is connected to the filter chamber 204. When the drain outlet valve 206 is open, the drain outlet 207 is opened, meaning the drain outlet 207 is connected to the filter chamber 204. In this invention, the descriptions such as "open filter 200" and "turn on filter 200" mainly refer to opening the air inlet 201 and the air outlet 210; while "close filter 200" mainly refers to closing the air inlet 201 and the air outlet 210.

[0046] Figure 3 This illustration shows one application scenario of the filtration device 100. Driven by a vacuum pump, gas can pass sequentially through the inlet 201, filter chamber 204, and outlet 210 of the filter 200. Furthermore, the gas passes through the filter element 203 in the filter chamber 204, where powder or other particulate matter mixed in the gas is blocked and prevented from flowing towards the vacuum pump.

[0047] Reference Figure 1 In one embodiment, the filtration device 100 further includes an inlet pipe 101 and an outlet pipe 103. Multiple filters 200 are provided, connected in parallel between the inlet pipe 101 and the outlet pipe 103. The inlet pipe 101 can be connected to a reaction vessel, for example, to a vacuum dehydration furnace; the outlet pipe 103 can be connected to a vacuum pump. Under the suction of the vacuum pump, the gas in the vacuum dehydration furnace passes sequentially through the inlet pipe 101, the filter 200, and the outlet pipe 103, and finally flows to the vacuum pump.

[0048] Reference Figure 1In one embodiment, the detection mechanism includes a first pressure sensor 102, a second pressure sensor 104, and a controller (not shown). The first pressure sensor 102 is installed on the intake pipe 101 and is used to detect the gas pressure inside the intake pipe 101. The second pressure sensor 104 is installed on the exhaust pipe 103 and is used to detect the gas pressure inside the exhaust pipe 103. Both the first pressure sensor 102 and the second pressure sensor 104 are communicatively connected to the controller, and the detection results of the first pressure sensor 102 and the second pressure sensor 104 can be transmitted to the controller. The controller calculates the difference between the gas pressure inside the intake pipe 101 and the gas pressure inside the exhaust pipe 103, and determines whether the filter element 203 needs cleaning based on this difference. For example, when this difference exceeds a certain preset pressure difference value, it is determined that the filter element 203 needs cleaning.

[0049] Reference Figure 1 In one embodiment, the cleaning mechanism 110 includes an air tank 107, an air jet pipe 109, and an air jet valve 108. One end of the air jet pipe 109 is connected to the air tank 107, and the other end of the air jet pipe 109 is located inside the filter chamber 204. The air jet valve 108 is mounted on the air jet pipe 109, and the portion of the air jet pipe 109 located inside the filter chamber 204 has air jet holes (not specifically shown). A detection mechanism is communicatively connected to the air jet valve 108. When the filter 200 needs cleaning, the detection mechanism drives the air jet valve 108 to open, thereby causing gas in the air tank 107 to be ejected from the air jet holes of the air jet pipe 109. Figure 1 As shown, when there are multiple filters 200, there can be multiple cleaning mechanisms 110. Each cleaning mechanism 110 is used to clean different filters 200, and each filter housing 205 is penetrated by different jet pipes 109.

[0050] More specifically, the cleaning mechanism 110 can perform cleaning by backflushing, that is, the flow direction of the gas blown out by the cleaning mechanism 110 as it passes through the filter element 203 is opposite to the flow direction of the gas that needs to be filtered by the filter 200 as it passes through the filter element 203. For example, refer to Figure 3 The filter element 203 is cylindrical. As gas flows sequentially through the inlet 201, filter element 203, and outlet 210, the gas passes through the filter element 203 from the outside in. (Refer to...) Figure 5 The jet pipe 109 is located at the center of the filter element 203, and the gas ejected from the jet pipe 109 passes through the filter element 203 from the inside to the outside.

[0051] The filter device 100 may also include a powder storage tank (not specifically shown), which may be installed at the drain outlet 207, into which powder or particulate matter blown out from the drain outlet 207 may enter. The powder storage tank is used to collect powder for subsequent recycling.

[0052] The operating method provided by this invention includes the following steps:

[0053] When the testing agency detects that the filter 200 needs to be cleaned, it closes the air inlet 201 and air outlet 210 of the filter 200 to be cleaned, opens the drain outlet 207 of the filter 200 to be cleaned, and the cleaning agency 110 blows air into the filter element 203 of the filter 200 to be cleaned to perform cleaning.

[0054] This place is Figure 1 , Figure 3 and Figure 5 Let's take an example to explain the above steps. Figure 1 , Figure 3 or Figure 5 There are two filters 200 in total. For easy distinction, one of the filters 200 is referred to as the first filter 105 and the other filter 200 is referred to as the second filter 106.

[0055] Reference Figure 3 At a certain moment, only the first filter 105 in the filtration device 100 is open, while the second filter 106 is closed. Gas passes only through and is filtered only by the first filter 105. Subsequently, when the detection mechanism detects that the first filter 105 needs cleaning, the first filter 105 becomes the filter 200 to be cleaned. Next, refer to... Figure 5 The air inlet 201 and outlet 210 of the first filter 105 can be closed, and then the drain outlet 207 of the first filter 105 can be opened. The cleaning mechanism 110 blows air into the filter housing 205 of the first filter 105 to blow away the material powder, dust or other particles accumulated on the filter element 203 of the first filter 105, and blows these things out from the first drain outlet 207.

[0056] By utilizing the operating method of the filter device 100 of the present invention, it is possible to detect whether the filter 200 needs cleaning. When it is detected that the filter 200 needs cleaning, the cleaning mechanism 110 can blow air onto the filter element 203 to perform cleaning, eliminating the need for equipment maintenance personnel to manually remove and clean the filter element 203 of the filter 200. Therefore, the operating method of the filter device 100 of the present invention is beneficial to improving the cleaning efficiency of the filter device 100.

[0057] Reference Figure 7 In one embodiment, the step of the detection mechanism detecting whether the filter 200 needs cleaning in the operating method specifically includes:

[0058] The actual pressure difference between the intake pipe 101 and the outlet pipe 103 is obtained. If the actual pressure difference exceeds the first preset pressure difference value within a series of preset time units, the detection mechanism determines that the filter 200, which is in the open state, needs to be cleaned.

[0059] The "actual pressure difference" between the inlet pipe 101 and the outlet pipe 103 specifically refers to the difference between the gas pressure in the inlet pipe 101 and the gas pressure in the outlet pipe 103. This setting effectively determines whether the filter 200 needs cleaning by monitoring the pressure difference of the gas flowing through it. Specifically, as filtration progresses, the amount of material powder adhering to the filter element 203 gradually increases, clogging the pores and increasing the resistance to gas flow. Consequently, the pressure difference before and after the gas flows through the filter element 203 gradually increases, and the difference between the gas pressure in the inlet pipe 101 and the outlet pipe 103 gradually widens. When the actual pressure difference is too large, the filter element 203 becomes severely clogged, affecting the filtration and vacuuming effects, and potentially damaging upstream and downstream equipment of the filter device 100. When the filter element 203 is severely clogged, it needs to be cleaned promptly. Therefore, by comparing the actual differential pressure value with the first preset differential pressure value, it can be determined whether the filter element 203 is severely blocked, and thus whether the filter element 203 needs to be cleaned.

[0060] For example, in one embodiment, the first preset differential pressure value is 0.5 MPa, the preset unit time is 10 s, and the preset number of times is 3. The detection mechanism can detect the actual differential pressure value once every preset unit time after the filter device 100 starts running, that is, detect the actual differential pressure value once every 10 s. If the actual differential pressure value exceeds 0.5 MPa, the detection mechanism counts. When the actual differential pressure value obtained by three consecutive detections is greater than 0.5 MPa, the detection mechanism determines that the filter 200, which is currently in the open state, needs to be cleaned.

[0061] It should be noted that the first preset differential pressure value, preset unit time, and preset number of times can be flexibly selected. The values ​​in the above examples are only for illustrative purposes and are not the only possible choices for the parameters of this invention. The first preset differential pressure value, preset unit time, and preset number of times can be pre-input into the controller of the detection mechanism, and the controller has timing and counting functions.

[0062] For a filter device 100 having multiple filters 200, refer to Figure 6 In one embodiment, the running method further includes the following steps:

[0063] This causes some filters 200 to be closed and others to be open.

[0064] When one of the filters 200 that is in the open state needs to be cleaned, the filter 200 that is in the closed state is turned on, the filter 200 to be cleaned is turned off, and the cleaning is performed.

[0065] The advantage of this setup is that the filter 200 can be cleaned without shutting down the vacuum pump and vacuum dehydration furnace. The following is an example... Figures 3 to 5 Let's take an example to explain. (Refer to...) Figure 3 At a certain moment, the first filter 105 is in the open state, and the second filter 106 is in the closed state. Gas flows from the inlet pipe 101 through the first filter 105 and reaches the outlet pipe 103. Only the first filter 105 filters the gas in the filtration device 100. Subsequently, when the first filter 105 needs cleaning (determined by a detection mechanism), the second filter 106 can be opened first, so that the first filter 105 and the second filter 106 are open simultaneously (e.g., Figure 4 (As shown). After the second filter 106 is turned on for a period of time, the first filter 105 is turned off, as per [reference]. Figure 5 During the subsequent period, the second filter 106 performs filtration, and the first filter 105, which has been closed, can have its filter element 203 cleaned by the cleaning mechanism 110. When the second filter 106 needs cleaning later, the first filter 105, which has already been cleaned, can be reopened, and then the second filter 106 can be closed and cleaned.

[0066] That is, during the gas filtration process of the filter device 100, the first filter 105 and the second filter 106 can filter the gas alternately, and the first filter 105 and the second filter 106 can be cleaned alternately. There is always at least one filter 200 in the filter device 100 that can perform the filtration function, and the vacuum pump does not need to be stopped.

[0067] It should be noted that, Figures 1 to 5 This is just one embodiment of the invention. The number of filters 200 in the filtration device 100 is not limited to two. In other embodiments, the number of filters 200 can be more, as long as the two sets of filters 200 (each set may include multiple filters 200) can operate and clean alternately. Specific examples are not given here.

[0068] As mentioned above, when the filter device 100 has multiple filters 200, different filters 200 can operate alternately. To improve the operational stability of the vacuum pump during filter 200 state switching, refer to... Figure 8 In one embodiment, "turning on a filter 200 that is in a closed state, turning off the filter 200 to be cleaned, and cleaning it" specifically includes:

[0069] After turning on one of the filters 200 that is in the off state, when the actual differential pressure value is less than the second preset differential pressure value (the second preset differential pressure value is less than the first preset differential pressure value), turn off the filter 200 to be cleaned.

[0070] Still with Figure 3 and Figure 4 This step will be explained using an example. (Refer to...) Figure 3 The first filter 105 is in the open state, and the second filter 106 is in the closed state; then refer to Figure 4 When the first filter 105 needs cleaning, the second filter 106 opens first. Part of the gas in the inlet pipe 101 flows through the first filter 105 to the outlet pipe 103, while the remaining gas in the inlet pipe 101 flows through the second filter 106 to the outlet pipe 103. After the second filter 106 opens, the actual pressure difference gradually decreases because even if the filter element 203 of the first filter 105 is severely blocked, the gas in the inlet pipe 101 can still pass smoothly through the filter element 203 of the second filter 106 and be successfully transferred to the outlet pipe 103. When the actual pressure difference drops to the second preset pressure difference value, the gas can stably pass through the second filter 106 and flow to the outlet pipe 103. At this point, closing the first filter 105 will not cause excessive fluctuations in the actual gas pressure difference, thus facilitating stable operation of the vacuum pump. The specific value of the second preset pressure difference value can also be flexibly selected based on the debugging results of the filter device 100; no specific example is given here.

[0071] Reference Figure 1 To improve the operational stability of the vacuum pump, in one embodiment, the filter 200 further includes a bypass pipe 209 and a bypass valve 208. Multiple bypass pipes 209 and bypass valves 208 are provided. Each bypass pipe 209 is connected to a different filter housing 205, and both ends of the bypass pipe 209 are connected to the filter housing 205 and the outlet pipe 103, respectively. Each bypass pipe 209 is equipped with a bypass valve 208. The bypass valve 208 can communicate with a detection mechanism, which controls the opening and closing of the bypass valve 208. After the bypass valve 208 is opened, both ends of the bypass pipe 209 are connected to the filter chamber 204 and the outlet pipe 103, respectively.

[0072] With bypass valve 208 and bypass pipe 209 installed, refer to Figure 9 In one embodiment, the step of "turning on the filter 200 which is in a closed state" in the running method specifically includes:

[0073] First, open the bypass valve 208 of the filter 200, and then open the air inlet 201 and air outlet 210 of the filter 200.

[0074] by Figure 5 For example, Figure 5After the first filter 105, which is in a closed state, is cleaned, the drain port of the first filter 105 can be closed first, and then the bypass valve of the first filter 105 can be opened to balance the air pressure in the filter chamber 204 of the first filter 105 with the air pressure in the outlet pipe 103. When the first filter 105 is reopened later, the fluctuation of the actual pressure difference value is relatively small, which is beneficial to improving the operational stability of the vacuum pump.

[0075] Reference Figure 5 After the inlet 201 and outlet 210 of the first filter 105 are opened and the inlet 201 and outlet 210 of the second filter 106 are closed, when the actual differential pressure value drops below the second preset value, the detection mechanism determines that the filter device has returned to a stable operating state, at which point the bypass valve 208 can be closed. Therefore, in one embodiment, the operating method may further include: after one filter 200 is reopened and the other filter 200 is closed, when the actual differential pressure value is less than the second preset value, closing the bypass valve of the filter 200 that is in the open state.

[0076] To remind equipment maintenance personnel to replace filter element 203 in a timely manner, refer to... Figure 10 In one embodiment, the running method further includes the following steps:

[0077] After one of the filters 200 is cleaned and restarted, if the actual differential pressure value is less than the first preset differential pressure value and greater than the second preset differential pressure value within a preset interval, the detection agency will issue an alarm message.

[0078] The alarm message issued by the testing agency is used to remind equipment maintenance personnel to replace filter element 203 (replace filter element 203 of the most recently cleaned filter 200). This alarm message can be text, symbols, or graphic information displayed on the screen, or it can be an audio message emitted through a speaker.

[0079] Due to its limited lifespan, after prolonged use and multiple cleanings, the filter element 203 of filter 200 may become worn or damaged and may not be properly cleaned. Filter elements 203 that are difficult to clean need to be replaced. Under normal circumstances, the gas in the intake pipe 101 passes through the freshly cleaned filter element 203 into the outlet pipe 103. After a period of time, the actual pressure difference will become relatively small (below the second preset pressure difference value). Using the time when the filter restarts as the starting point for timing, if the actual pressure difference cannot decrease to below the second preset pressure difference value after the preset interval (remaining between the second and first preset pressure difference values), it may be that the dirt on the surface of the filter element 203 cannot be cleaned properly, or that the filter element 203 itself has aged, causing its pores to become smaller, thus preventing the gas from passing smoothly through the filter element 203. In this case, the filter element 203 needs to be replaced. The specific duration of the preset interval can also be flexibly selected by the user based on the equipment's debugging results; no specific example is given here.

[0080] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A method for operating a filtration device, applicable to a filtration device comprising a filter, a detection mechanism, an air inlet pipe, an air outlet pipe, and a cleaning mechanism, wherein the filter comprises a filter housing and a filter element located inside the filter housing, and multiple filters are provided, the multiple filters being connected in parallel between the air inlet pipe and the air outlet pipe, characterized in that, The detection mechanism includes a first pressure sensor and a second pressure sensor. The first pressure sensor is installed in the air inlet pipe and is used to detect the air pressure inside the air inlet pipe. The second pressure sensor is installed in the air outlet pipe and is used to detect the air pressure inside the air outlet pipe. The operation method of the filtration device includes the following steps: To put one portion of the filters in a closed state and another portion of the filters in an open state; The detection mechanism obtains the actual pressure difference between the air inlet pipe and the air outlet pipe. If the actual pressure difference exceeds the first preset pressure difference value within a series of preset time intervals, the detection mechanism determines that the filter in the open state needs to be cleaned. When the detection mechanism detects that one of the filters in the open state needs to be cleaned, it opens one of the filters in the closed state. Then, when the actual pressure difference value is less than the second preset pressure difference value, it closes the air inlet and outlet of the filter to be cleaned and opens the drain outlet of the filter to be cleaned. The cleaning mechanism blows air into the filter element in the filter to be cleaned to perform cleaning. Wherein, the second preset differential pressure value is less than the first preset differential pressure value; The process also includes the following steps: after one of the filters is cleaned and restarted, if the actual differential pressure value is less than the first preset differential pressure value and greater than the second preset differential pressure value within a preset interval, the detection mechanism issues an alarm message. The filter also includes multiple bypass pipes and multiple bypass valves. Each bypass pipe is connected to a different filter housing, and both ends of the bypass pipe are connected to the filter housing and the air outlet pipe, respectively. Each bypass pipe is equipped with a bypass valve. Before opening the air inlet and outlet of the filter, first open the bypass valve of the filter.

2. A filtration device, characterized in that, include: The filter is provided in multiple parts. The filter includes a filter housing, a filter element, an air inlet valve, an air outlet valve, and a drain valve. The filter housing has a filter chamber, a drain port, an air inlet, and an air outlet. The air inlet valve can close or open the air inlet. The air outlet valve can close or open the air outlet. The drain valve can close or open the drain port. The cleaning mechanism is capable of blowing air into and cleaning the filter element; The detection mechanism is capable of detecting whether the filter element needs cleaning. The cleaning mechanism, the air inlet valve, the air outlet valve, and the drain valve are all communicatively connected to the detection mechanism. The detection mechanism includes a first pressure sensor and a second pressure sensor. An air intake pipe, wherein the first pressure sensor is installed in the air intake pipe and is used to detect the air pressure inside the air intake pipe; An air outlet pipe is provided, and both the air inlet pipe and the air outlet pipe are connected to the filter housing. Multiple filters are connected in parallel between the air inlet pipe and the air outlet pipe. A second pressure sensor is installed on the air outlet pipe and is used to detect the air pressure of the air outlet pipe. Both the first pressure sensor and the second pressure sensor are communicatively connected to the controller. The filter device is configured such that: the detection mechanism obtains the actual pressure difference value between the air inlet pipe and the air outlet pipe; if the actual pressure difference value exceeds the first preset pressure difference value within a series of preset time intervals, the detection mechanism determines that the filter in the open state needs to be cleaned. When the detection mechanism detects that one of the filters in the open state needs cleaning, it opens the other filter in the closed state. Then, when the actual differential pressure value is less than a second preset differential pressure value, it closes the air inlet and outlet of the filter to be cleaned and opens the drain outlet of the filter to be cleaned. The cleaning mechanism blows air into the filter element in the filter to be cleaned to perform cleaning; wherein the second preset pressure difference value is less than the first preset pressure difference value.

3. The filtration device according to claim 2, characterized in that, The filter also includes multiple bypass pipes and multiple bypass valves. Each bypass pipe is connected to a different filter housing, and both ends of the bypass pipe are connected to the filter housing and the air outlet pipe, respectively. Each bypass pipe is equipped with a bypass valve.

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