Filter apparatus control system and method

Abstract

The application discloses a kind of filtering equipment control system and method, belong to oil and gas transportation field.The system includes first control device and filtering equipment, controller obtains the component state information and pressure difference value of multiple filtering branches;If filtering equipment is in 1 use 1 backup mode, in response to component state information or pressure difference value meets the abnormal condition of in-use filtering branch, send filtering branch switching instruction to controller, if filtering equipment is in multiple use multiple backup mode, in response to component state information or pressure difference value meets the abnormal condition of in-use filtering branch, send filtering branch opening instruction to controller;Controller receives filtering branch switching instruction, and carries out switching processing to the filtering branch of filtering equipment;Or, receive filtering branch opening instruction, and carry out opening processing to the filtering branch of filtering equipment, without setting corresponding on-duty personnel in distribution station, reduce manpower cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil and gas transportation, and in particular to a filter equipment control system and method. BACKGROUND

[0002] On a long-distance pipeline of natural gas, a natural gas distribution station is established. A filter equipment is arranged in the distribution station. The filter equipment can filter impurities in the natural gas. After the natural gas is filtered, the filtered natural gas is distributed to residents and the like.

[0003] In the related art, the filter equipment includes multiple filter branches. In the use process of the filter equipment, some filter branches are in a use state and some filter branches are in a standby state. When a filter branch in the use state fails, a standby filter branch is started by an on-duty personnel.

[0004] Since an on-duty personnel needs to be arranged at each distribution station, a large labor cost is caused. If the on-duty personnel cannot timely find that a filter branch fails or the on-duty personnel makes an operation error, the filter equipment can be damaged or even an accident can occur, and thus a high safety risk exists. SUMMARY

[0005] Embodiments of the present application provide a filter equipment control system and method, which can reduce a labor cost, can timely control the filter equipment, can reduce damage to the filter equipment and occurrence of an accident, and can improve safety of a distribution station. Technical solutions provided by embodiments of the present application are as follows.

[0006] In one aspect, a filter equipment control system is provided. The system includes a first control device and a filter equipment arranged in a distribution station. The filter equipment includes a controller and multiple filter branches. The controller is electrically connected with each filter branch. The controller is in communication connection with the first control device.

[0007] The controller is configured to acquire component state information and a pressure difference value of the multiple filter branches, and send the component state information and the pressure difference value to the first control device. The pressure difference value represents a pressure difference before and after natural gas is filtered in the filter branch.

[0008] The first control device is configured to, if the filter equipment is in a 1:1 backup mode, send a filter branch switching instruction to the controller in response to the component state information or the pressure difference value satisfying an in-use filter branch abnormal condition. The 1:1 backup mode means that the filter equipment includes one in-use filter branch and one standby filter branch.

[0009] The first control device is further configured to, if the filter device is in a multiple-in-service and multiple-standby mode, and the component state information or the pressure difference value satisfies the in-service filter branch abnormal condition, send a filter branch opening instruction to the controller, where the multiple-in-service and multiple-standby mode means that the filter device comprises multiple in-service filter branches and multiple standby filter branches.

[0010] The controller is configured to receive the filter branch switching instruction and perform switching processing on filter branches of the filter device, or receive the filter branch opening instruction and perform opening processing on filter branches of the filter device.

[0011] In a possible implementation, any filter branch comprises an upstream electric valve, a filter separator, and a downstream electric valve, and the pressure difference value is a value measured by a differential pressure transmitter located on the filter separator.

[0012] The first control device is configured to, in response to the component state information indicating that the downstream electric valve in any in-service filter branch of the filter device is in a full-closed position state, an emergency shutdown state, or a fault state, or any obtained pressure difference value is greater than a reference threshold value, or the component state information indicating that the filter separator in any in-service filter branch of the filter device is in a fault state, send a control instruction matched with the operation mode of the filter device to the controller according to the operation mode of the filter device.

[0013] In a possible implementation, any filter branch comprises a downstream electric valve.

[0014] The controller is configured to, according to the filter branch switching instruction, control the downstream electric valve in a standby filter branch of the filter device to be in a full-open position state, and control the downstream electric valve in another filter branch of the filter device to be in a full-closed position state, or

[0015] The controller is configured to, according to the filter branch opening instruction, control the downstream electric valve in one standby filter branch of the filter device to be in a full-open position state.

[0016] In a possible implementation, the first control device is further configured to display a first control interface, and in response to detecting, through the first control interface, a filter branch switching operation of the filter device, send the filter branch switching instruction to the controller, or in response to detecting, through the first control interface, a filter branch opening operation of the filter device, send the filter branch opening instruction to the controller.

[0017] In a possible implementation, the system further comprises a second control device deployed in the distribution station, the second control device is connected with the filter device, and the filter device is in the 1+1 mode;

[0018] The second control device is configured to display a second control interface, and in response to detecting a filter branch switching operation of the filter device through the second control interface, send the filter branch switching instruction to the first control device;

[0019] The first control device is configured to send the filter branch switching instruction to the controller in response to receiving the filter branch switching instruction.

[0020] The controller is configured to switch the filter branch of the filter device according to the filter branch switching instruction.

[0021] In a possible implementation, the system further comprises a plurality of filter devices, and the plurality of filter devices are deployed in different distribution stations.

[0022] The first control device is configured to display a running mode setting interface, and obtain the running mode set for any filter device through the running mode setting interface; or

[0023] The first control device is configured to display a priority setting interface, and obtain the priority set for each filter branch in any filter device through the priority setting interface, the priority is any integer less than or equal to N+1, the N is the number of standby filter branches of the filter device, the priority set for the filter branch is 1, indicating that the filter branch is an in-use filter branch, the priority set for the filter branch is greater than 1, indicating that the filter branch is a standby filter branch, and the priorities of different standby filter branches in the same filter device are different.

[0024] In a possible implementation, the first control device is configured to reduce the priority of each filter branch in the filter device by 1 after the controller switches the filter branch of the filter device, and if the priority of any filter branch is 0, adjust the priority of the filter branch to 2; or

[0025] The first control device is configured to set the priority of the added standby filter branch to 1 after the controller adds the standby filter branch of the filter device.

[0026] In a possible implementation, the first control device is further configured to, after determining that the filter device is in normal operation, perform the step of sending a filter branch opening instruction to the controller or sending a filter branch opening instruction to the controller in response to the component state information or the pressure difference value satisfying the in-use filter branch abnormal condition.

[0027] In a possible implementation, any filter branch comprises an upstream electric valve, a filter separator, and a downstream electric valve.

[0028] The first control device is configured to determine that the filter device is in normal operation if the component state information indicates that the filter device is in a working state, upstream electric valves and downstream electric valves in an in-use filter branch of the filter device are both in a full-on position, an upstream electric valve in a standby filter branch of the filter device is in a full-on position, and a downstream electric valve in the standby filter branch of the filter device is in a full-off position.

[0029] In an aspect, a filter device control method is provided, which is applied to a filter device control system, the system comprising a first control device and a filter device deployed in a distribution station, the filter device comprising a controller and a plurality of filter branches, the controller being electrically connected with each filter branch, and the controller being communicatively connected with the first control device.

[0030] The controller acquires component state information of the plurality of filter branches and a pressure difference value, and sends the component state information and the pressure difference value to the first control device, the pressure difference value representing a pressure difference before and after natural gas filtration in the filter branch.

[0031] If the filter device is in a 1-in-1-out mode, the first control device sends a filter branch switching instruction to the controller in response to the component state information or the pressure difference value satisfying an in-use filter branch abnormal condition, the 1-in-1-out mode indicating that the filter device comprises one in-use filter branch and one standby filter branch.

[0032] If the filter device is in a multi-in-multi-out mode, the first control device sends a filter branch opening instruction to the controller in response to the component state information or the pressure difference value satisfying the in-use filter branch abnormal condition, the multi-in-multi-out mode indicating that the filter device comprises a plurality of in-use filter branches and a plurality of standby filter branches.

[0033] The controller receives the filter branch switching instruction and performs switching processing on the filter branch of the filter device, or receives the filter branch opening instruction and performs opening processing on the filter branch of the filter device.

[0034] In a possible implementation, any filter branch includes an upstream electric valve, a filter separator and a downstream electric valve, and the pressure difference value is a value measured by a differential pressure transmitter located on the filter separator;

[0035] The first control device is configured to, in response to the component state information indicating that a downstream electric valve in any active filter branch of the filter device is in a full-closed state, an emergency-closed state or a fault state, or any pressure difference value obtained is greater than a reference threshold value, or the component state information indicating that a filter separator in any active filter branch of the filter device is in a fault state, send, according to an operation mode of the filter device, a control instruction matched with the operation mode to the controller.

[0036] In a possible implementation, any filter branch includes a downstream electric valve;

[0037] The controller is configured to, according to the filter branch switching instruction, control a downstream electric valve in a standby filter branch of the filter device to be in a full-open state, and control a downstream electric valve in another filter branch of the filter device to be in a full-closed state; or

[0038] The controller is configured to, according to the filter branch opening instruction, control a downstream electric valve in one standby filter branch of the filter device to be in a full-open state.

[0039] In a possible implementation, the first control device is further configured to display a first control interface, and in response to detecting, through the first control interface, a filter branch switching operation of the filter device, send the filter branch switching instruction to the controller, or in response to detecting, through the first control interface, a filter branch opening operation of the filter device, send the filter branch opening instruction to the controller.

[0040] In a possible implementation, the system further includes a second control device deployed in the distribution station, the second control device is connected with the filter device, and the filter device is in the 1:1 standby mode;

[0041] The second control device is configured to display a second control interface, and in response to detecting, through the second control interface, a filter branch switching operation of the filter device, send the filter branch switching instruction to the first control device;

[0042] The first control device is configured to, in response to receiving the filter branch switching instruction, send the filter branch switching instruction to the controller.

[0043] The controller is configured to switch filter branches of the filter device according to the filter branch switching instruction.

[0044] In a possible implementation, the system further comprises a plurality of filter devices, and the plurality of filter devices are deployed in different distribution stations.

[0045] The first control device is configured to display a running mode setting interface through which the running mode set for any filter device is obtained; or

[0046] The first control device is configured to display a priority setting interface through which the priority set for each filter branch in any filter device is obtained, the priority being any integer less than or equal to N+1, the N being the number of standby filter branches of the filter device, the priority set for the filter branch being 1 indicating that the filter branch is an in-use filter branch, the priority set for the filter branch being greater than 1 indicating that the filter branch is a standby filter branch, and the priorities of different standby filter branches in the same filter device being different.

[0047] In a possible implementation, the first control device is configured to, after the controller performs the switching process on the filter branches of the filter device, decrease the priority of each filter branch in the filter device by 1, and if the priority of any filter branch is 0, adjust the priority of the filter branch to 2; or

[0048] The first control device is configured to, after the controller performs the opening process on the filter branches of the filter device, set the priority of the opened standby filter branch to 1.

[0049] In a possible implementation, the first control device is further configured to, after determining that the filter device is in normal operation, perform the step of sending the filter branch opening instruction to the controller in response to the component state information or the pressure difference value satisfying the in-use filter branch abnormal condition, or sending the filter branch opening instruction to the controller.

[0050] In a possible implementation, any filter branch comprises an upstream electric valve, a filter separator, and a downstream electric valve.

[0051] The first control device is configured to, if the component state information indicates that the filter device is in a working state, the upstream electric valve and the downstream electric valve in the in-use filter branch of the filter device are both in a fully open at-position state, the upstream electric valve in the standby filter branch of the filter device is in a fully open at-position state, and the downstream electric valve in the standby filter branch of the filter device is in a fully closed at-position state, determine that the filter device is in normal operation.

[0052] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0053] The embodiment of the present application provides a control system for automatically controlling a filtering device, component state information of a plurality of filtering branches in the filtering device is acquired through a controller on the filtering device, whether an abnormality exists in a filtering branch in use of the filtering device is determined, if the abnormality exists in the filtering branch in use, the filtering device can be controlled in time, and the filtering device can be accurately controlled according to an operation mode of the filtering device, without setting corresponding on-duty personnel in a distribution station, so that the human cost is reduced, the filtering device can be controlled in time, damage of the filtering device and accidents are avoided, and the safety of the distribution station is improved. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0055] Figure 1 is a schematic diagram of a filtering device control system according to an example embodiment;

[0056] Figure 2 is a schematic diagram of a filtering device in a 1+1 mode according to an example embodiment;

[0057] Figure 3 is a schematic diagram of a filtering device in a multi-use multi-backup mode according to an example embodiment;

[0058] Figure 4 is a schematic diagram of another filtering device control system according to an example embodiment;

[0059] Figure 5 is a schematic diagram of another filtering device control system according to an example embodiment;

[0060] Figure 6 is a filtering device control method flow chart according to an example embodiment;

[0061] Figure 7 is a switching method flow chart according to an example embodiment;

[0062] Figure 8 is an opening method flow chart according to an example embodiment;

[0063] Figure 9 is a filtering device control method flow chart according to an example embodiment. DETAILED DESCRIPTION

[0064] For the purpose, technical solutions and advantages of the present application to be clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0065] The filter equipment control system provided by the embodiments of the present application can be applied to any scene of filtering natural gas.

[0066] For example, applied to a distribution station field with relatively dirty natural gas quality:

[0067] The relatively dirty natural gas quality means that the natural gas contains solid particulate matter or oil stains and other non-alkane gas substances. If the natural gas quality is relatively dirty, it will greatly affect the accuracy of natural gas metering, and even damage the filter equipment (for example, damage the metering pry in the distribution station field and block the pressure regulating pry), greatly affect the safe and stable transportation of natural gas, and the filter equipment may appear the situation of increased pressure difference before and after the filter element in a short period due to the dirty filter element. The filtering effect of the filter separator is reduced, and even the other components behind the filter separator are damaged. If the filter equipment control system provided by the embodiments of the present application is used, after detecting that the pressure difference transmitter value of the filter separator increases by more than the threshold value, the filtering branch of the filter equipment can be switched or opened, and the operator can also be reminded to replace the filter element in the filter separator, thereby eliminating the possibility of dirty natural gas entering the rear components.

[0068] For example, applied to a control center with fewer operators

[0069] The control center will govern multiple natural gas distribution station fields, and there are many distribution station fields and fewer operators. The filter equipment in a single distribution station field often cannot be found in time when a problem occurs, and even multiple filter equipment in the distribution station field needs to be switched or opened at the same time. If the filter equipment control system provided by the embodiments of the present application is used, the filter equipment in a single distribution station field can be simultaneously opened or switched, thereby reducing the number of manual operations and the risk of manual operation errors.

[0070] Figure 1 is a schematic diagram of a filter equipment control system according to an example embodiment. As shown in Figure 1 The control system 100 includes a first control device 101 and a filter equipment 102 deployed in a distribution station field, wherein the first control device 101 can be deployed at any position outside the distribution station field.

[0071] The filter equipment 102 includes a controller 1021 and multiple filtering branches. The controller is electrically connected with each filtering branch, and the controller 1021 establishes a communication connection with the first control device 101.

[0072] The filter branch is used for filtering natural gas, and the controller 1021 is used for controlling the filter branch, for example, the controller 1021 controls whether the filter branch performs filtering processing, and the controller 1021 determines component state information and a pressure difference value of the filter branch.

[0073] The controller 1021 acquires the component state information and the pressure difference value of the plurality of filter branches, and sends the component state information and the pressure difference value to the first control device 101. The pressure difference value represents a pressure difference of natural gas before and after filtering in the filter branch.

[0074] The filter branch includes a plurality of components, and the component state information is state information of at least one component of the plurality of components. The component state information can indicate a working state of the component, for example, the component state information indicates that the component is in a full-on state, a full-off state, a working state, an emergency shutdown state, a fault state, and the like.

[0075] The first control device 101 is used for, if the filter device is in a 1+1 mode, sending a filter branch switching instruction to the controller 1021 in response to the component state information or the pressure difference value satisfying an in-use filter branch abnormality condition. The 1+1 mode means that the filter device 102 includes one in-use filter branch and one standby filter branch.

[0076] When the in-use filter branch is abnormal, the state of some components in the in-use filter branch may be in an abnormal state, for example, a downstream valve in the filter branch is in a full-off state, natural gas cannot flow out through the downstream valve, and thus natural gas cannot continue to flow into the upstream valve of the filter branch. The natural gas in the filter branch no longer flows, and the filter branch cannot complete the filtering processing.

[0077] In addition, if the pressure difference of natural gas before and after filtering in a certain in-use filter branch changes greatly or the pressure difference is large, it indicates that the in-use filter branch may be blocked.

[0078] Therefore, the component state information or the pressure difference value of the filter branch can determine whether the filter branch is abnormal. The in-use filter branch abnormality condition indicates various situations that may occur when the in-use filter branch is abnormal.

[0079] In addition, the filter device control system provided by the embodiment of the present application can perform targeted control on the filter device according to the operation mode of the filter device. If the filter device 102 is in a 1+1 mode, the filter device 102 includes one in-use filter branch and one standby filter branch, for example, the filter device 102 is in a 1+1 mode, and the first control device 101 sends the filter branch switching instruction to the controller 1021 in response to the component state information or the pressure difference value satisfying the in-use filter branch abnormality condition. Figure 2As shown, in the case that the in-use filter branch abnormal condition is met, it can be determined which filter branch is abnormal, and the current in-use filter branch is switched to the standby filter branch, and the current standby filter branch is switched to the in-use filter branch.

[0080] The first control device 101 is further configured to, if the filter device is in a multiple-in-use and multiple-standby mode, and the in-use filter branch abnormal condition is met according to the component state information or the pressure value, send a filter branch opening instruction to the controller 1021, where the multiple-in-use and multiple-standby mode means that the filter device 102 includes multiple in-use filter branches and multiple standby filter branches, as shown in Figure 3

[0081] If the filter device 102 is in the multiple-in-use and multiple-standby mode, the filter device 102 includes multiple in-use filter branches and multiple standby filter branches, and in the case that the in-use filter branch abnormal condition is met, it may not be possible to accurately determine which in-use filter branch is abnormal, for example, the pressure difference value of the filter branch meets the in-use filter branch abnormal condition, and the upstream and downstream of the multiple in-use filter branches are connected, as shown in Figure 3 Therefore, the pressure difference values of each in-use filter branch are almost the same, and it is not possible to accurately determine which in-use filter branch is abnormal, and therefore, the filter device control system increases a new in-use filter branch to increase the natural gas passing capacity of the filter branch and balance the pressure difference.

[0082] The controller 1021 is further configured to receive the filter branch switching instruction and perform switching processing on the filter branches of the filter device 102, or receive the filter branch opening instruction and perform opening processing on the filter branches of the filter device 102.

[0083] The switching processing performed by the controller 1021 on the filter branches of the filter device 102 means that the in-use filter branch of the filter device 102 is switched to the standby filter branch, and the standby filter branch of the filter device 102 is switched to the in-use filter branch. The opening processing performed by the controller 1021 on the filter branches of the filter device 102 means that an in-use filter branch of the filter device 102 is added.

[0084] In a possible implementation, any filter branch includes a downstream electric valve, the controller 1021 is configured to, according to the filter branch switching instruction, control the downstream electric valve in the standby filter branch of the filter device 102 to be in a fully open position, and control the downstream electric valve in another filter branch of the filter device 102 to be in a fully closed position, or the controller 1021 is configured to, according to the filter branch opening instruction, control the downstream electric valve in one standby filter branch of the filter device 102 to be in a fully open position.

[0085] ​The filter equipment control system provided by the embodiments of the present application is a control system for automatically controlling filter equipment. The controller on the filter equipment acquires component state information of multiple filter branches in the filter equipment, determines whether an abnormality exists in an in-use filter branch of the filter equipment, controls the filter equipment in a timely manner if an abnormality exists in the in-use filter branch, and controls the filter equipment accurately according to an operation mode of the filter equipment. No corresponding on-duty personnel needs to be arranged at a distribution and transmission station, labor cost is reduced, the filter equipment can be controlled in a timely manner, damage to the filter equipment and accidents are avoided, and the safety of the distribution and transmission station is improved.

[0086] In a possible implementation manner, any filter branch of the filter equipment 102 includes multiple components such as an upstream electric valve, a filter separator, and a downstream electric valve. Optionally, the filter branch further includes a differential pressure transmitter, and a pressure difference value is a value measured by the differential pressure transmitter located on the filter separator. Optionally, the upstream of the filter branch is provided with a pressure measuring instrument, and the downstream is also provided with a pressure measuring instrument. The pressure difference value is obtained by comparing the measured values of the upstream pressure measuring instrument and the downstream pressure measuring instrument.

[0087] The upstream electric valve is configured to control the passage of the upstream natural gas, that is, to control the input of the natural gas into the filter separator. The filter separator is configured to filter the input natural gas and remove impurities in the natural gas. The downstream electric valve is configured to control the output of the natural gas. The natural gas output from the filter separator is delivered to the downstream natural gas user through the downstream electric valve.

[0088] The component state information satisfying the in-use filter branch abnormality condition can mean that any component in the in-use filter branch has an abnormality. Optionally, the first control device 101 is configured to, in response to the component state information indicating that the downstream electric valve in any in-use filter branch of the filter equipment 102 is in a full-closed position state, an emergency shutdown state, or a fault state, or the filter separator in any in-use filter branch of the filter equipment 102 is in a fault state, send a control instruction matched with the operation mode of the filter equipment to the controller 1021.

[0089] The full-closed position state means that the downstream electric valve is in a closed state. Optionally, after the electric valve is opened, the electric valve sends an opening notification to the controller 1021, so that the controller 1021 knows that the electric valve is in a full-open position state. Similarly, after the electric valve is closed, the electric valve also sends a closing notification to the controller 1021, so that the controller 1021 knows that the electric valve is in a full-closed position state. That is, the electric valve or other components sends a notification message to the controller 1021 after the state of the electric valve or other components changes, so that the controller 1021 determines the state of each component in a timely manner.

[0090] It should be noted that the accident shutdown state refers to the electric valve closing due to other reasons without receiving the closing instruction, and the electric valve closing here refers to the action of closing the electric valve, at this time, the electric valve can be completely closed or partially closed. The fault state refers to the failure of a component part.

[0091] It should be noted that: when each component sends a notification message to the controller 1021, the component identifier of the component can be written, so that the controller 1021 determines the state of different components, and distinguishes whether the component is in the filter branch or in the standby filter branch.

[0092] The first control device 101 sends the control instruction matched with the operation mode of the filter device 102 to the controller 1021 according to the operation mode of the filter device 102, which means that if the filter device 102 is in the 1:1 standby mode, the filter branch switching instruction is sent to the controller 1021; if the filter device 102 is in the multiple-use multiple standby mode, the filter branch opening instruction is sent to the controller 1021.

[0093] In addition, the component state information meeting the in-use filter branch abnormal condition can also mean that the pressure difference between the upstream and downstream of the filter branch is abnormal. The first control device 101 also sends the control instruction matched with the operation mode of the filter device 102 to the controller 1021 according to the operation mode of the filter device 102 in response to any pressure difference value greater than the reference threshold value.

[0094] By monitoring the downstream electric valve, filter separator and upstream and downstream pressure difference of the in-use filter branch, it can be found whether the in-use filter branch is abnormal in time, and a response can be made in time to ensure the safety of the distribution station.

[0095] In a possible implementation manner, the filter device 102 can be controlled by a technician through the first control device 101. Optionally, the first control device 101 displays a first control interface, and the technician can control the filter device 102 through the first control interface. Optionally, the first control device 101 sends the filter branch switching instruction to the controller in response to detecting the filter branch switching operation of the filter device through the first control interface; or sends the filter branch opening instruction to the controller in response to detecting the filter branch opening operation of the filter device through the first control interface.

[0096] It should be noted that the embodiments of the present application only take the process of controlling one filter device 102 by the first control device 101 as an example for exemplarily illustrating the filter device control system. In actual application, the first control device 101 can control multiple filter devices 102, and therefore, multiple options corresponding to the multiple filter devices 102 can be displayed on the first control interface, and the technician selects one filter device 102 from the multiple filter devices 102 and controls the selected filter device 102.

[0097] It should be noted that the embodiments of the present application only take the first control interface displayed by the first control device 101 to control the filter device, and in another embodiment, the first control device 101 includes an operation table, and the technician controls the filter device 102 by triggering the operation of the button on the operation table, and the embodiments of the present application do not limit the manner of the first control device 101 controlling the filter device 102.

[0098] In a possible implementation manner, as shown in Figure 4 The filter device control system further includes a second control device 103 deployed in the distribution station, and the second control device 103 is connected with the filter device 102. The second control device 103 is only used to control the filter device 102 deployed in the same distribution station.

[0099] Optionally, the second control device 103 displays a second control interface, and the technician controls the filter device 102 through the second control interface. For example, the second control device 103 sends a filter branch switching instruction to the controller 1021 in response to detecting a filter branch switching operation of the filter device 102 through the second control interface; or sends a filter branch opening instruction to the controller 1021 in response to detecting a filter branch opening operation of the filter device 102 through the first control interface.

[0100] In some cases, only one filter device 102 is arranged in one distribution station, and the running mode of the filter device 102 is fixed, and therefore, the second control device 103 can only send an instruction matched with the running mode.

[0101] Optionally, the filter device 102 is in a 1+1 mode, and the second control device 103 is configured to display a second control interface and send a filter branch switching instruction to the filter device 102 in response to detecting a filter branch switching operation of the filter device 102 through the second control interface.

[0102] It should be noted that the second control device 103 is similar to the first control device 101, and can control the filter device through the control interface or the operation table, and the embodiments of the present application do not limit this.

[0103] In addition, since the first control device 101 is capable of controlling the filtering device 102, the second control device 103 is also capable of controlling the filtering device 102. In a possible implementation, after the first control device 101 controls the filtering device 102, the controller 1021 feeds back the state of the filtering device 102 to the first control device 101 and the second control device 103, so that the first control device 101 and the second control device 103 update the state of the filtering device 102; similarly, after the second control device 103 controls the filtering device 102, the controller 1021 feeds back the state of the filtering device 102 to the first control device 101 and the second control device 103, so that the first control device 101 and the second control device 103 update the state of the filtering device 102.

[0104] In another possible implementation, the second control device 103 controls the filtering device 102 through the first control device 101. Optionally, the filtering device is in a 1:1 backup mode; the second control device 103 is configured to display a second control interface, and in response to detecting, through the second control interface, a filtering branch switching operation on the filtering device 102, send a filtering branch switching instruction to the first control device 101; the first control device 101 is configured to, in response to receiving the filtering branch switching instruction, send the filtering branch switching instruction to the controller 1021; and the controller 1021 is configured to switch the filtering branch of the filtering device 102 according to the filtering branch switching instruction.

[0105] Optionally, the filtering device is in a multiple: multiple backup mode; the second control device 103 is configured to display a second control interface, and in response to detecting, through the second control interface, a filtering branch adding operation on the filtering device 102, send a filtering branch adding instruction to the first control device 101; the first control device 101 is configured to, in response to receiving the filtering branch adding instruction, send the filtering branch adding instruction to the controller 1021; and the controller 1021 is configured to perform an adding processing on the filtering branch of the filtering device 102 according to the filtering branch adding instruction.

[0106] The filtering device control system provided by the embodiment of the application includes not only the remote control first control device but also the short-range control second control device, so that the technician can control the filtering device through the remote first control device to ensure the safety of the technician, and can also control the filtering device through the short-range second control device to ensure the safety of the distribution station.

[0107] In a possible implementation, as shown in FIG. 2, the second control device 103 is configured to display a second control interface, and in response to detecting, through the second control interface, a filtering branch switching operation on the filtering device 102, send a filtering branch switching instruction to the first control device 101; the first control device 101 is configured to, in response to receiving the filtering branch switching instruction, send the filtering branch switching instruction to the controller 1021; and the controller 1021 is configured to switch the filtering branch of the filtering device 102 according to the filtering branch switching instruction. Figure 5As shown, the filter equipment control system further comprises a plurality of filter equipments 102, and the plurality of filter equipments 102 are deployed in different distribution stations. The plurality of filter equipments 102 are uniformly managed by the first control equipment 101.

[0108] When the filter equipment 102 is connected to the filter equipment control system, the relevant information of the filter equipment 102 can be input in the first control equipment. Optionally, the first control equipment 101 is configured to display a running mode setting interface, and the running mode set for any filter equipment 102 is obtained through the running mode setting interface. The running mode of each filter equipment 102 in the filter equipment control system is set by a technician in the running mode setting interface. The running mode can be a 1 active and 1 standby mode, or a multiple active and multiple standby mode.

[0109] Since the filter equipment 102 usually comprises a plurality of filter branches, the plurality of filter branches comprise active filter branches and standby filter branches, in order to accurately open the corresponding filter branch when the filter equipment 102 is working, the technician can also set the priority of the plurality of filter branches. Optionally, the first control equipment 101 is configured to display a priority setting interface, and the priority set for each filter branch in any filter equipment is obtained through the priority setting interface. The priority is any integer less than or equal to N+1, N is the number of standby filter branches of the filter equipment, the priority set for the filter branch is 1, which means that the filter branch is an active filter branch, the priority set for the filter branch is greater than 1, which means that the filter branch is a standby filter branch, and the priorities of different standby filter branches in the same filter equipment are different.

[0110] In order to ensure that the information of the filter equipment 102 stored in the first control equipment 101 is consistent with the real information of the filter equipment 102, the information of the filter equipment 102 needs to be updated after the filter equipment 102 is controlled.

[0111] In a possible implementation, the first control equipment 101 is configured to reduce the priority of each filter branch in the filter equipment 102 by 1 after the controller 1021 performs the switching process on the filter branch of the filter equipment 102, and if the priority of any filter branch is 0, the priority of the filter branch is adjusted to 2.

[0112] When the filter device 102 is in the 1:1 standby mode, the first control device 101 performs switching processing on the filter branches of the filter device 102 when the in-use filter branch of the filter device 102 fails, switches the original in-use filter branch to the standby filter branch, switches the original standby filter branch to the in-use filter branch, and reduces the priority of each filter branch by 1, so that the priority of the original standby filter branch becomes 1, and the priority of 1 indicates that the filter branch is the in-use filter branch; the priority of the original in-use filter branch becomes 0, and thus the priority of the original in-use filter branch is adjusted to 2, and the priority of 2 indicates that the filter branch is the standby filter branch.

[0113] In a possible implementation, the first control device 101 is configured to set the priority of the added standby filter branch to 1 after the controller 1021 performs the adding processing on the filter branches of the filter device 102.

[0114] The filter device control system provided by the embodiment of the present application sets the priority for the filter branches, and changes the priority along with the control of the filter device, so that the first control device can accurately determine the in-use filter branch and the standby filter branch in the filter device.

[0115] In a possible implementation, the first control device 101 is further configured to, after determining that the filter device 102 is in normal operation, perform the steps of sending the filter branch adding instruction to the controller 1021 in response to the component state information or the pressure difference value satisfying the in-use filter branch abnormal condition, or sending the filter branch adding instruction to the controller 1021, or sending the filter branch switching instruction to the controller 1021.

[0116] That is, the first control device 101 determines whether the filter device 102 is in normal operation after the filter device 102 is started, and sends the corresponding instruction to the controller 1021 to control the filter device 102 to change from abnormal operation to normal operation after the filter device 102 changes from normal operation to abnormal operation.

[0117] The normal operation of the filter device 102 means that the filter device 102 is in a working state and the working state is normal.

[0118] In a possible implementation, the first control device 101 determines whether the filter device 102 is operating normally, including: the first control device 101 is configured to determine that the filter device 102 is operating normally if the component state information indicates that the filter device 102 is in a working state, the upstream electric valve and the downstream electric valve in the filter branch in use of the filter device 102 are both in a full open position, the upstream electric valve in the standby filter branch of the filter device 102 is in a full open position, and the downstream electric valve in the standby filter branch of the filter device 102 is in a full close position.

[0119] It should be noted that, in a possible implementation, if the first control device 101 determines that the filter device 102 is not operating normally, the first control device 101 will not automatically control the filter device 102, which is equivalent to providing a switch for the first control device to automatically control the filter device 102 according to whether the filter device 102 can operate normally after starting. When the filter device 102 can operate normally after starting, the first control device 101 monitors the filter device 102 and performs an opening increasing or switching process on the filter branch of the filter device 102 when the filter device 102 fails.

[0120] It should be further noted that, in order to ensure the safety of the distribution station, when the first control device 101 determines that the filter device 102 is not operating normally, at least one of the following can be performed:

[0121] (1) sending a stop instruction to the filter device 102, where the stop instruction is used to instruct the filter device 102 to stop working.

[0122] Since the filter device 102 does not operate normally after starting, if the filter device 102 continues to work, an accident may occur. Therefore, the first control device 101 sends a stop instruction to the filter device 102, and the filter device 102 stops working after receiving the stop instruction.

[0123] (2) sending an alarm signal to the filter device 102.

[0124] After receiving the alarm signal sent by the first control device 101, the filter device 102 issues an alarm to make the technical personnel know that the filter device 102 does not operate normally after starting, so that the technical personnel process the filter device 102.

[0125] It should be noted that, in some embodiments, the first control device 101 is further configured to, after determining that the filtration device 102 is in normal operation and the filtration device 102 is in the automatic control mode or the remote control mode, execute the step of sending a filtration branch opening instruction or a filtration branch switching instruction to the controller in response to the component state information or the pressure difference value satisfying the in-use filtration branch abnormal condition.

[0126] It should be noted that, in order to avoid signal interference, in a possible implementation, the controller executes any received instruction after the instruction is received and lasts for a first time length. The first time length can be any time length, for example, 200 ms, 300 ms, or 500 ms.

[0127] In order to avoid misjudgment of the state, in a possible implementation, the filtration device 102 is determined to be in a fault state when the filtration device 102 is in the fault state for a second time length. For example, the filtration device 102 includes an alarm installed on any component, which is configured to alarm when the component fails. The alarm sends an alarm signal to the controller of the filtration device 102, and the alarm signal lasts for a second time length, and the component is determined to be in a fault state. For another example, the filtration separator is determined to be in a fault state when the pressure difference value of the filtration separator is greater than a reference threshold value, and the pressure difference value of the filtration separator is greater than the reference threshold value for a second time length.

[0128] The second time length can be any time length, for example, 10 seconds, 20 seconds, or 30 seconds.

[0129] It should be noted that, in a possible implementation, the controller processes the standby filtration branch first when processing the filtration branch of the filtration device according to the received instruction.

[0130] For example, when the controller receives a filtration branch switching instruction, the controller first controls the downstream electric valve in the standby filtration branch to be in a fully open state, and then controls the downstream electric valve in the in-use filtration branch to be in a fully closed state after the downstream electric valve in the standby filtration branch is in the fully open state and lasts for a third time length.

[0131] The third time length can be any time length, for example, 5 seconds.

[0132] In addition, according to recent statistics of the automatic switching operation of multiple distribution station failures and the original method of manual switching after the on-duty personnel monitors the scene, the comparison is shown in Table 1 below. The average lag refers to the average time consumed from the occurrence of the failure to the successful occurrence of the failure switching. The method provided in the embodiments of the present application can significantly reduce the lag of the switching time and significantly improve the accuracy of the switching.

[0133] Automatic switching Manual switching Number of observation switches 67 87 Number of switch completions 63 65 Switch success rate 94％ 75％ Switch average latency (seconds) 65 1132

[0134] Table 1

[0135] It should be noted that the embodiments of the present application are only described by taking the filter equipment as an example in the one-to-one backup mode or the multiple-to-multiple backup mode. In some embodiments, the filter equipment can also be in the one-to-multiple backup mode or the multiple-to-one backup mode. It should be noted that when the filter equipment is in the one-to-M backup mode, the filter branch of the filter equipment is switched when the filter branch of the filter equipment is abnormal, where M is any integer greater than or equal to 1. When the filter equipment is in the multiple-to-N backup mode, the filter branch of the filter equipment is opened when the filter branch of the filter equipment is abnormal.

[0136] For example, as shown in Figure 6 For any filter equipment, the first control device first determines whether the filter equipment is in the one-to-one backup mode. If the filter equipment is not in the one-to-one backup mode, the first control device determines whether the filter equipment is in the one-to-multiple backup mode. If the filter equipment is in the one-to-one backup mode or the one-to-multiple backup mode, the first control device determines whether the filter equipment is normally running. In the case where the filter equipment is normally running, it is determined whether the filter equipment is in the remote control state. If the filter equipment is in the remote control state, the running condition of the filter branch of the filter equipment is monitored to determine whether the filter equipment needs to be switched. If so, the process of switching the filter branch is performed, and it is determined whether the switching of the filter branch is successful. If the switching fails, an alarm can be triggered to remind the on-duty personnel to perform the switching operation on the filter equipment.

[0137] If the filter equipment is not in the one-to-one backup mode or the one-to-multiple backup mode, the first control device determines whether the filter equipment is normally running. In the case where the filter equipment is normally running, it is determined whether the filter equipment is in the remote control state. If the filter equipment is in the remote control state, the running condition of the filter branch of the filter equipment is monitored to determine whether the filter equipment needs to be opened. If so, the process of opening the filter branch is performed, and it is determined whether the opening of the filter branch is successful. If the opening fails, an alarm can be triggered to remind the on-duty personnel to perform the opening operation on the filter equipment.

[0138] The first control device performs a process of switching the filter branch, which can be as shown in FIG. 3. Figure 7 The first control device sends a command to the filter device to open the downstream electric valve of the standby filter branch, determines whether the downstream electric valve of the standby filter branch is fully opened to position, if the downstream electric valve of the standby filter branch is fully opened to position, the first control device sends a command to the filter device to close the downstream electric valve of the original in-use filter branch, determines whether the downstream electric valve of the original in-use filter branch is fully closed to position, if the downstream electric valve of the original in-use filter branch is fully closed to position, the priority of the original standby filter branch and the original in-use filter branch is changed, and then the switching process is completed. If the downstream electric valve of the original standby filter branch is not fully opened to position or the downstream electric valve of the original in-use filter branch is not fully closed to position after exceeding the switching allowed time, the switching process is considered to fail.

[0139] The first control device performs a process of adding the filter branch, which can be as shown in FIG. 6. Figure 8 The first control device sends a command to the filter device to open the downstream electric valve of the standby filter branch with the highest priority, determines whether the downstream electric valve is fully opened to position, if the downstream electric valve is fully opened to position, the priority of the standby filter branch is changed to 1, and it is determined that the adding process is successful; if the downstream electric valve is not fully opened to position after exceeding the adding allowed time, it is determined that the adding process fails.

[0140] Figure 9 FIG. 7 is a flow chart of a filter device control method according to an example embodiment, which is applied to the filter device control system shown in any one of FIGS. 1 to 5. Figure 1 Figure 4 Figure 5 The filter device control system at least includes a first control device and a filter device deployed in a distribution station, the filter device includes a controller and a plurality of filter branches, the controller is electrically connected with each filter branch, and the controller is communicatively connected with the first control device, and the method includes the following steps.

[0141] 901, the controller obtains component state information and pressure difference values of the plurality of filter branches, and sends the component state information and the pressure difference values to the first control device, the pressure difference values representing the pressure difference before and after the natural gas is filtered in the filter branch.

[0142] 902, if the filter device is in a 1-in-1-back mode, the first control device sends a filter branch switching instruction to the controller in response to the component state information or the pressure difference values satisfying the in-use filter branch abnormal condition, the 1-in-1-back mode indicating that the filter device includes one in-use filter branch and one standby filter branch.

[0143] ​​903、if the filter device is in a multi-service multi-backup mode, the first control device sends a filter branch switching instruction to the controller in response to the component state information or the pressure difference value satisfying the in-service filter branch abnormal condition, the multi-service multi-backup mode indicating that the filter device includes multiple in-service filter branches and multiple backup filter branches.

[0144] 904、the controller receives the filter branch switching instruction and performs switching processing on the filter branches of the filter device, or receives the filter branch opening instruction and performs opening processing on the filter branches of the filter device.

[0145] In a possible implementation, any filter branch includes an upstream electric valve, a filter separator, and a downstream electric valve, and the pressure difference value is a value measured by a differential pressure transmitter located on the filter separator.

[0146] The first control device is configured to, in response to the component state information indicating that the downstream electric valve in any in-service filter branch of the filter device is in a full-closed-to-position state, an emergency shutdown state, or a fault state, or any obtained pressure difference value being greater than a reference threshold value, or the component state information indicating that the filter separator in any in-service filter branch of the filter device is in a fault state, send a control instruction matched with the operation mode of the filter device to the controller according to the operation mode of the filter device.

[0147] In a possible implementation, any filter branch includes a downstream electric valve.

[0148] The controller is configured to, according to the filter branch switching instruction, control the downstream electric valve in a backup filter branch of the filter device to be in a full-open-to-position state, and control the downstream electric valve in another filter branch of the filter device to be in a full-closed-to-position state; or

[0149] The controller is configured to, according to the filter branch opening instruction, control the downstream electric valve in one backup filter branch of the filter device to be in a full-open-to-position state.

[0150] In a possible implementation, the first control device is further configured to display a first control interface, and in response to detecting, through the first control interface, a filter branch switching operation on the filter device, send a filter branch switching instruction to the controller, or in response to detecting, through the first control interface, a filter branch opening operation on the filter device, send a filter branch opening instruction to the controller.

[0151] In a possible implementation, the system further includes a second control device deployed in the distribution station, the second control device is connected with the filter device, and the filter device is in a 1-service 1-backup mode.

[0152] The second control device is configured to display a second control interface, and in response to detecting a filter branch switching operation of the filter device through the second control interface, send a filter branch switching instruction to the first control device;

[0153] The first control device is configured to, in response to receiving the filter branch switching instruction, send the filter branch switching instruction to the controller.

[0154] The controller is configured to switch the filter branch of the filter device according to the filter branch switching instruction.

[0155] In a possible implementation, the system further comprises a plurality of filter devices, and the plurality of filter devices are deployed in different distribution station fields.

[0156] The first control device is configured to display a running mode setting interface, and obtain a running mode set for any filter device through the running mode setting interface; or

[0157] The first control device is configured to display a priority setting interface, and obtain a priority set for each filter branch in any filter device through the priority setting interface, the priority being any integer less than or equal to N+1, N being the number of standby filter branches of the filter device, the priority set for the filter branch being 1 indicating that the filter branch is an in-use filter branch, the priority set for the filter branch being greater than 1 indicating that the filter branch is a standby filter branch, and the priorities of different standby filter branches in the same filter device being different.

[0158] In a possible implementation, the first control device is configured to, after the controller switches the filter branch of the filter device, decrease the priority of each filter branch in the filter device by 1, and if the priority of any filter branch is 0, adjust the priority of the filter branch to 2; or

[0159] The first control device is configured to, after the controller switches the filter branch of the filter device, decrease the priority of each filter branch in the filter device by 1, and if the priority of any filter branch is 0, adjust the priority of the filter branch to 2; or

[0160] In a possible implementation, the first control device is further configured to, after determining that the filter device is in normal operation, execute the step of sending a filter branch opening instruction to the controller in response to the component state information or the pressure difference value satisfying the in-use filter branch abnormal condition, or sending the filter branch opening instruction to the controller.

[0161] In a possible implementation, any filter branch comprises an upstream electric valve, a filter separator, and a downstream electric valve.

[0162] The first control device is configured to determine that the filter device is operating normally if the component status information indicates that the filter device is in an operating state, the upstream electric valve and the downstream electric valve in the active filter branch of the filter device are both in a fully open at rest state, the upstream electric valve in the standby filter branch of the filter device is in a fully open at rest state, and the downstream electric valve in the standby filter branch of the filter device is in a fully closed at rest state.

[0163] The above merely aims to facilitate the understanding of the technical solutions of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control system for a filtration device, characterized in that, The system includes a first control device for remote control, a filtration device deployed in a distribution station, a second control device for local control, and multiple filtration devices deployed in different distribution stations. Each filtration device includes a controller and multiple filtration branches. The controller is electrically connected to each filtration branch and has a communication connection with the first control device. The second control device is connected to the filtration device. The first control device is used to display a priority setting interface, and obtain the priority set for each filter branch in any filter device through the priority setting interface. The priority is any integer less than or equal to N+1, where N is the number of standby filter branches in the filter device. A priority of 1 for a filter branch indicates that the filter branch is in use, and a priority greater than 1 for a filter branch indicates that the filter branch is a standby filter branch. Different standby filter branches in the same filter device have different priorities. The controller is used to acquire the component status information and pressure difference value of the multiple filtration branches, and send the component status information and pressure difference value to the first control device. The pressure difference value represents the pressure difference before and after natural gas filtration in the filtration branch. The first control device is used to determine whether the filter device is in a 1-in-1-standby mode; if the filter device is not in a 1-in-1-standby mode, it is used to determine whether the filter device is in a 1-in-multiple-standby mode. If the filtration device is in a 1-in-1-standby mode or a 1-in-multiple-standby mode, determine whether the filtration device is operating normally. If the filtration device is operating normally, determine whether the filtration device is in a remote control state. If the filtration device is in remote control mode, the operation status of the filtration branch of the filtration device is monitored; in response to the component status information or the pressure difference value meeting the abnormal conditions of the in-use filtration branch, a filtration branch switching command is sent to the controller, the 1-in-1-standby mode indicates that the filtration device includes 1 in-use filtration branch and 1 standby filtration branch; the second control device is used to display a second control interface if the filtration device is in local control mode, and in response to detecting a filtration branch switching operation of the filtration device through the second control interface, send the filtration branch switching command to the controller; The first control device is further configured to determine whether the filter device is operating normally if the filter device is not in a 1-on-1 standby mode or a 1-on-multiple standby mode, and to determine whether the filter device is in a remote control state if the filter device is operating normally. If the filtration device is in remote control mode, the operation status of the filtration branch of the filtration device is monitored; in response to the component status information or the pressure difference value meeting the abnormal conditions of the in-use filtration branch, a filtration branch opening command is sent to the controller. The second control device is further configured to display the second control interface if the filter device is in a local control state, and send a filter branch opening command to the controller in response to detecting an operation to open a filter branch of the filter device through the second control interface. The controller is used to receive the filter branch switching command and perform the filter branch switching process of the filter device; or, to receive the filter branch addition command and perform the filter branch addition process of the filter device. The first control device is used to decrement the priority of each filter branch in the filter device by 1 after the controller switches the filter branches of the filter device; if the priority of any filter branch is 0, the priority of the filter branch is adjusted to 2; or, after the controller adds a filter branch to the filter device, the priority of the added standby filter branch is set to 1. The controller is further configured to feed back the status of the filter device to the first control device and the second control device after the first control device or the second control device controls the filter device, so that the first control device and the second control device update the status of the filter device.

2. The system according to claim 1, characterized in that, Each filtration branch includes an upstream electric valve, a filter separator, and a downstream electric valve, and the pressure difference value is the value measured by a differential pressure transmitter located on the filter separator; The first control device is configured to respond to the component status information indicating that the downstream electric valve in any in-use filtration branch of the filtration device is in a fully closed state, an accident shut-off state, or a fault state; or, if any obtained pressure difference value is greater than a reference threshold; or, if the component status information indicates that the filter separator in any in-use filtration branch of the filtration device is in a fault state, to send a control command matching the operating mode to the controller according to the operating mode of the filtration device.

3. The system according to claim 1, characterized in that, Each filter branch includes a downstream electric valve; The controller is used to, according to the filter branch switching command, control the downstream electric valve in the backup filter branch of the filter equipment to be fully open, and then control the downstream electric valve in another filter branch of the filter equipment to be fully closed; or... The controller is used to control the downstream electric valve in a spare filter branch of the filter equipment to be in the fully open position according to the filter branch opening instruction.

4. The system according to claim 1, characterized in that, The first control device is also configured to display a first control interface, and in response to detecting a filter branch switching operation of the filter device through the first control interface, send the filter branch switching command to the controller; Alternatively, in response to detecting an operation to add a filter branch to the filter device through the first control interface, a filter branch addition command is sent to the controller.

5. The system according to claim 1, characterized in that, The second control device is further configured to send the filter branch switching command to the first control device in response to detecting a filter branch switching operation of the filter device through the second control interface; The first control device is configured to send the filter branch switching command to the controller in response to receiving the filter branch switching command; The controller is used to switch the filter branches of the filtration device according to the filter branch switching command.

6. The system according to any one of claims 1 to 5, characterized in that, The first control device is used to display the operation mode setting interface, and to obtain the operation mode set for any filter device through the operation mode setting interface.

7. The system according to claim 1, characterized in that, The first control device is further configured to, after determining that the filter device is operating normally, execute the step of sending a filter branch addition command to the controller in response to the component status information or the pressure difference value satisfying the abnormal condition of the in-use filter branch, or sending a filter branch switching command to the controller.

8. The system according to claim 7, characterized in that, Any filtration branch includes an upstream electric valve, a filter separator, and a downstream electric valve; The first control device is used to determine that the filter is operating normally if the component status information indicates that the filter is in working state, the upstream and downstream electric valves in the in-use filter branch of the filter are both fully open, the upstream electric valve in the standby filter branch of the filter is fully open, and the downstream electric valve in the standby filter branch of the filter is fully closed.

9. A method for controlling a filtration device, characterized in that, The system is applied in a filtration equipment control system. The system includes a first control device for remote control, filtration equipment deployed in a distribution station, a second control device for local control, and multiple filtration devices deployed in different distribution stations. Each filtration device includes a controller and multiple filtration branches. The controller is electrically connected to each filtration branch and has a communication connection with the first control device. The second control device is connected to the filtration device. The first control device displays a priority setting interface. The priority setting interface is used to obtain the priority set for each filter branch in any filter device. The priority is any integer less than or equal to N+1, where N is the number of backup filter branches in the filter device. A priority of 1 for a filter branch indicates that the filter branch is in use, and a priority greater than 1 for a filter branch indicates that the filter branch is a backup filter branch. Different backup filter branches in the same filter device have different priorities. The controller acquires the component status information and pressure difference value of the multiple filtration branches, and sends the component status information and pressure difference value to the first control device. The pressure difference value represents the pressure difference before and after natural gas filtration in the filtration branch. The first control device determines whether the filter device is in a 1-in-1-standby mode; if the filter device is not in a 1-in-1-standby mode, it determines whether the filter device is in a 1-in-multiple-standby mode. If the filtration device is in a 1-in-1-standby mode or a 1-in-multiple-standby mode, determine whether the filtration device is operating normally. If the filtration device is operating normally, determine whether the filtration device is in a remote control state. If the filtration device is in remote control mode, the operation of the filtration branch of the filtration device is monitored; in response to the component status information or the pressure difference value meeting the abnormal conditions of the in-use filtration branch, a filtration branch switching command is sent to the controller, the 1-in-1-standby mode indicates that the filtration device includes 1 in-use filtration branch and 1 standby filtration branch; if the filtration device is in local control mode, the second control device displays a second control interface, and in response to detecting a filtration branch switching operation of the filtration device through the second control interface, a filtration branch switching command is sent to the controller. If the filtration device is not in a 1-in-1-standby mode or a 1-in-multiple-standby mode, the first control device determines whether the filtration device is operating normally. If the filtration device is operating normally, it determines whether the filtration device is in a remote control state. If the filtration device is in remote control mode, the operation status of the filtration branch of the filtration device is monitored; in response to the component status information or the pressure difference value meeting the abnormal conditions of the in-use filtration branch, a filtration branch opening command is sent to the controller. If the filtration device is in a local control state, the second control device displays the second control interface, and in response to detecting an operation to add a filter branch to the filtration device through the second control interface, sends the filter branch addition command to the controller. The controller receives the filter branch switching command and performs the filter branch switching process for the filter device; or, it receives the filter branch addition command and performs the filter branch addition process for the filter device. After the controller switches the filter branches of the filter device, the first control device decrements the priority of each filter branch in the filter device by 1. If the priority of any filter branch is 0, the priority of the filter branch is adjusted to 2. Alternatively, after the controller adds a filter branch to the filter device, the priority of the added standby filter branch is set to 1.

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