An online automatic cleaning system and method for precision filters

Abstract

The application discloses an online automatic cleaning system for a precision filter, which comprises a cleaning water tank, a cleaning water pump, a precision filter and a control system, the cleaning water tank is connected with the precision filter through the cleaning water pump, the control system is connected with the cleaning water pump, and the control system is used for managing and controlling the cleaning water pump; the control system comprises an acquisition module, a processing module and a control module, the acquisition module is used for acquiring working state data of the precision filter and transmitting the acquired working state data to the processing module, the processing module is used for setting a working state instruction of the cleaning water pump according to the working state data, and the control module is used for controlling the working state of the cleaning water pump according to the working state instruction set by the processing module. The online automatic cleaning of the precision filter is realized by controlling the operation of the cleaning water pump, the service life of the filter core is prolonged, and resources are saved.

Description

Technical Field

[0001] This invention relates to the field of precision filter technology, and in particular to an online automatic cleaning system and method for precision filters. Background Technology

[0002] Precision filters, also known as security filters, typically have a stainless steel outer shell. Internally, they use tubular filter elements such as PP melt-blown, wire-spun, pleated, titanium, and activated carbon filters. Different filter elements are selected based on the specific filtration medium and design process to meet the required effluent quality. They are used for solid-liquid separation of various suspensions, filtration of pharmaceutical solutions with high environmental requirements and high filtration precision, and have a wide range of applications in pharmaceutical, food, chemical, environmental protection, and water treatment industries.

[0003] The precision filter element is the core component of the filter and directly determines the filtration effect. By removing a small amount of impurities from the filter medium, it can protect the normal operation of the equipment or ensure the cleanliness of the air. When the fluid passes through the filter element with a certain precision, the impurities are blocked, while the clean fluid flows out through the filter element.

[0004] However, during prolonged use, impurities will accumulate on the filter element, affecting its filtration efficiency. This necessitates filter element replacement, and in areas with poor water quality, replacement becomes even more frequent. Therefore, there is an urgent need for an online automatic cleaning method for precision filters to achieve online cleaning of the filter element and extend its service life. Summary of the Invention

[0005] The purpose of this invention is to provide an online automatic cleaning system and method for precision filters, which solves the problem of frequent replacement of precision filter elements due to poor water quality affecting their service life.

[0006] This invention provides an online automatic cleaning system for a precision filter, comprising: a cleaning water tank, a cleaning water pump, a precision filter, and a control system. The cleaning water tank is connected to the precision filter via the cleaning water pump, and the control system is connected to the cleaning water pump. The control system is used to manage and control the cleaning water pump.

[0007] The control system includes a data acquisition module, a processing module, and a control module. The data acquisition module is used to acquire the operating status data of the precision filter and transmit the acquired operating status data to the processing module. The operating status data includes the suspended solids content of the water filtered by the precision filter and the operating time of the precision filter.

[0008] The processing module is used to set the working status command of the cleaning water pump according to the working status data.

[0009] The control module is used to control the working status of the cleaning water pump according to the working status instructions set by the processing module.

[0010] The processing module is used to determine the impurity accumulation content of the precision filter element based on the suspended solids content of the water filtered by the precision filter; to correct the impurity accumulation content based on the working time of the precision filter to obtain the final impurity accumulation content; and to determine the power supply frequency of the cleaning water pump based on the final impurity accumulation content.

[0011] This invention determines the final impurity accumulation content of the precision filter element and sets the power supply frequency of the cleaning water pump based on this, thereby controlling the pump to automatically clean the precision filter online, extending the service life of the filter element and saving resources.

[0012] In some embodiments of this application, the cleaning water tank is provided with an outlet and an inlet, the precision filter is provided with a first interface and a second interface, the outlet is connected to the first interface through a first pipeline, the first pipeline is sequentially provided with a first valve, a cleaning water pump, a second valve and a third valve, the second interface is connected to the inlet through a second pipeline, the second pipeline is provided with a fourth valve; the first pipeline between the second valve and the third valve is connected to the second pipeline between the fourth valve and the second interface through a third pipeline, the third pipeline is provided with a fifth valve; the first pipeline between the third valve and the first interface is connected to the second pipeline between the fourth valve and the inlet through a fourth pipeline, the fourth pipeline is provided with a sixth valve.

[0013] In some embodiments of this application, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve are all solenoid valves and are connected to a control system, which is used to control the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve.

[0014] In some embodiments of this application, the control module within the control system is configured with a target cleaning duration, and the control module is used to control the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve according to the target cleaning duration.

[0015] In some embodiments of this application, the control module controls the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve according to the target cleaning duration, including:

[0016] When cleaning begins, the control module controls the first valve, the second valve, the third valve, and the fourth valve to open, and controls the fifth valve and the sixth valve to close.

[0017] When the target cleaning time has elapsed, the control module controls the first valve, the second valve, the fifth valve, and the sixth valve to open, and controls the third valve and the fourth valve to close.

[0018] In some embodiments of this application, the acquisition module includes a suspended solids detector, which is used to detect the suspended solids content in the water filtered by the precision filter during operation.

[0019] In some embodiments of this application, the processing module is provided with a preset suspended solids content matrix S0, which is set as S0(S1, S2, S3, S4), wherein S1 is the first preset suspended solids content, S2 is the second preset suspended solids content, S3 is the third preset suspended solids content, S4 is the fourth preset suspended solids content, and S1 < S2 < S3 < S4.

[0020] A preset impurity accumulation content matrix Z0 is defined as Z0(Z1, Z2, Z3, Z4), where Z1 is the first preset impurity accumulation content, Z2 is the second preset impurity accumulation content, Z3 is the third preset impurity accumulation content, and Z4 is the fourth preset impurity accumulation content, and Z1 < Z2 < Z3 < Z4.

[0021] The processing module is used to obtain the suspended solids content s of the water filtered by the precision filter, and to set the impurity accumulation content of the precision filter element according to the relationship between the suspended solids content s and the preset suspended solids content.

[0022] When s < S1, the first preset impurity accumulation content Z1 is set as the impurity accumulation content of the precision filter element;

[0023] When S1≤s<S2, the second preset impurity accumulation content Z2 is set as the impurity accumulation content of the precision filter element;

[0024] When S2≤s<S3, the third preset impurity accumulation content Z3 is set as the impurity accumulation content of the precision filter element;

[0025] When S3≤s<S4, the fourth preset impurity accumulation content Z4 is set as the impurity accumulation content of the precision filter element.

[0026] In some embodiments of this application, the processing module is provided with a preset working time matrix T0, which is set as T0(T1, T2, T3, T4), where T1 is the first preset working time, T2 is the second preset working time, T3 is the third preset working time, T4 is the fourth preset working time, and T1 < T2 < T3 < T4.

[0027] A preset impurity accumulation content correction matrix a0 is defined, and a0(a1, a2, a3, a4) is set, where a1 is the first preset correction coefficient, a2 is the second preset correction coefficient, a3 is the third preset correction coefficient, a4 is the fourth preset correction coefficient, and 1 < a1 < a2 < a3 < a4 < 1.2.

[0028] After the processing module sets the i-th preset impurity accumulation content Zi as the impurity accumulation content of the precision filter element based on the suspended solids content s, i = 1, 2, 3, 4; it obtains the working time t of the precision filter, selects the corresponding correction coefficient according to the relationship between the working time t and each preset working time, and corrects the impurity accumulation content Zi of the precision filter element to obtain the final impurity accumulation content f.

[0029] When t < T1, the first preset correction coefficient a1 is selected to correct the impurity accumulation content Zi of the precision filter element, and the final impurity accumulation content f after correction is Zi * a1.

[0030] When T1≤t<T2, the second preset correction coefficient a2 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content after correction is f=Zi*a2;

[0031] When T2≤t<T3, the third preset correction coefficient a3 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content after correction is f=Zi*a3;

[0032] When T3≤t<T4, the fourth preset correction coefficient a4 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content f after correction is Zi*a4.

[0033] In some embodiments of this application, the processing module is provided with a preset final impurity accumulation content matrix F0, which is set as F0(F1, F2, F3, F4), where F1 is the first preset final impurity accumulation content, F2 is the second preset final impurity accumulation content, F3 is the third preset final impurity accumulation content, F4 is the fourth preset final impurity accumulation content, and F1 < F2 < F3 < F4.

[0034] The preset power supply frequency matrix H0 for the cleaning water pump is set as H0(H1, H2, H3, H4), where H1 is the first preset power supply frequency, H2 is the second preset power supply frequency, H3 is the third preset power supply frequency, and H4 is the fourth preset power supply frequency, and H1 < H2 < H3 < H4.

[0035] The processing module is used to obtain the final impurity accumulation content f, and set the power supply frequency of the cleaning water pump according to the relationship between the final impurity accumulation content f and each preset final impurity accumulation content.

[0036] When f < F1, the first preset power supply frequency H1 is set as the power supply frequency of the cleaning water pump;

[0037] When F1≤f<F2, the second preset power supply frequency H2 is set as the power supply frequency of the cleaning water pump;

[0038] When F2≤f<F3, the third preset power supply frequency H3 is set as the power supply frequency of the cleaning water pump;

[0039] When F3≤f<F4, the fourth preset power supply frequency H4 is set as the power supply frequency of the cleaning water pump.

[0040] This invention also discloses an online automatic cleaning method for precision filters, applicable to an online automatic cleaning system for precision filters including a cleaning water tank, a cleaning water pump, a precision filter, and a control system. The method includes:

[0041] The working status data of the precision filter is acquired and transmitted to the processing module. The working status data includes the suspended solids content of the water filtered by the precision filter and the working time of the precision filter.

[0042] The working status command of the cleaning water pump is set according to the working status data;

[0043] The working state of the cleaning water pump is controlled according to the working state instructions set by the processing module in order to clean the precision filter.

[0044] The process of setting the working status command of the cleaning water pump based on the working status data includes: determining the impurity accumulation content of the precision filter element based on the suspended solids content of the water filtered by the precision filter.

[0045] Based on the working time of the precision filter, the impurity accumulation content is corrected to obtain the final impurity accumulation content;

[0046] The power supply frequency of the cleaning water pump is determined based on the final impurity accumulation content.

[0047] This invention provides an online automatic cleaning system for a precision filter, comprising: a cleaning water tank, a cleaning water pump, a precision filter, and a control system. The cleaning water tank is connected to the precision filter via the cleaning water pump, and the control system is connected to the cleaning water pump. The control system is used to manage and control the cleaning water pump.

[0048] This invention determines the final impurity accumulation content of the precision filter element and sets the power supply frequency of the cleaning water pump accordingly. By controlling the cleaning water pump to pump water, the precision filter can be automatically cleaned online. This method can effectively clean the impurities accumulated on the filter element without causing secondary damage to the filter element, extending the service life of the filter element, increasing the operating cycle and replacement cycle of the filter element, and achieving the purpose of energy saving and consumption reduction.

[0049] This invention enables forward and backwashing of precision filter elements by controlling the opening and closing of valves. Furthermore, forward and backwashing can be repeated multiple times, effectively improving cleaning efficiency and ensuring the cleaning effect of the filter elements.

[0050] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0051] Figure 1 This is a partial structural schematic diagram of an online automatic cleaning system for precision filters according to the present invention;

[0052] Figure 2 This is a partial structural diagram of the control system in an embodiment of the present invention;

[0053] Figure 3 This is a schematic flowchart of an online automatic cleaning method for a precision filter according to the present invention;

[0054] Figure 4 This is a flowchart illustrating the method for setting the working status command of the cleaning water pump in an embodiment of the present invention.

[0055] Figure Labels

[0056] 1. Cleaning water tank; 11. Outlet; 12. Inlet; 2. Cleaning water pump; 3. Precision filter; 31. First interface; 32. Second interface; 41. First pipeline; 42. Second pipeline; 43. Third pipeline; 44. Fourth pipeline; 51. First valve; 52. Second valve; 53. Third valve; 54. Fourth valve; 55. Fifth valve; 56. Sixth valve. Detailed Implementation

[0057] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0058] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof, without excluding other elements or objects. The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "side," and "bottom," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are merely relational terms determined for the convenience of describing the structural relationships of the various components or elements of the present invention, and do not specifically refer to any component or element in the invention, nor should they be construed as limiting the invention. Terms such as "fixed," "connected," and "linked," etc., should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For researchers or technicians in the field, the specific meaning of the above terms in this invention can be determined according to the specific circumstances, and they should not be construed as limitations on this invention.

[0060] Example

[0061] This invention provides an online automatic cleaning system for precision filters, such as... Figure 1 , Figure 2 As shown, it includes: a cleaning water tank 1, a cleaning water pump 2, a precision filter 3, and a control system. The cleaning water tank 1 is connected to the precision filter 3 through the cleaning water pump 2, and the control system is connected to the cleaning water pump 2. The control system is used to manage and control the cleaning water pump 2.

[0062] The control system includes a data acquisition module, a processing module, and a control module. The data acquisition module is used to acquire the working status data of the precision filter 3 and transmit the acquired working status data to the processing module. The working status data includes the suspended solids content of the water filtered by the precision filter 3 and the working time of the precision filter 3.

[0063] The processing module is used to set the working status command of the cleaning water pump 2 according to the working status data.

[0064] The control module is used to control the working status of the cleaning water pump 2 according to the working status instructions set by the processing module.

[0065] The processing module is used to determine the impurity accumulation content of the filter element of the precision filter 3 based on the suspended solids content of the water filtered by the precision filter 3; to correct the impurity accumulation content based on the working time of the precision filter 3 to obtain the final impurity accumulation content; and to determine the power supply frequency of the cleaning water pump 2 based on the final impurity accumulation content.

[0066] This invention determines the final impurity accumulation content of the precision filter element 3 and sets the power supply frequency of the cleaning water pump 2 based on this, thereby controlling the cleaning water pump 2 to pump water and achieve online automatic cleaning of the precision filter 3, extending the service life of the filter element and saving resources.

[0067] In some embodiments of this application, the cleaning water tank 1 is provided with an outlet 11 and an inlet 12, the precision filter 3 is provided with a first interface 31 and a second interface 32, the outlet 11 is connected to the first interface 31 through a first pipe 41, the first pipe 41 is sequentially provided with a first valve 51, a cleaning water pump 2, a second valve 52 and a third valve 53, the second interface 32 is connected to the inlet 12 through a second pipe 42, and a fourth valve 54 is provided on the second pipe 42; the first pipe 41 between the second valve 52 and the third valve 53 is connected to the second pipe 42 between the fourth valve 54 and the second interface 32 through a third pipe 43, and a fifth valve 55 is provided on the third pipe 43; the first pipe 41 between the third valve 53 and the first interface 31 is connected to the second pipe 42 between the fourth valve 54 and the inlet 12 through a fourth pipe 44, and a sixth valve 56 is provided on the fourth pipe 44.

[0068] In some embodiments of this application, the types of several valves are improved to facilitate the automatic control of the valve opening and closing by the control system. The first valve 51, the second valve 52, the third valve 53, the fourth valve 54, the fifth valve 55, and the sixth valve 56 are all solenoid valves and are connected to the control system. The control system is used to control the opening and closing of the first valve 51, the second valve 52, the third valve 53, the fourth valve 54, the fifth valve 55, and the sixth valve 56.

[0069] In this embodiment, the cleaning water in the cleaning water tank 1 can be selected according to the type of impurities filtered in the water when the precision filter 3 is used, using a corresponding chemical cleaning solution.

[0070] In some embodiments of this application, the control module within the control system is configured with a target cleaning duration, and the control module is used to control the opening and closing of the first valve 51, the second valve 52, the third valve 53, the fourth valve 54, the fifth valve 55, and the sixth valve 56 according to the target cleaning duration.

[0071] In this embodiment, a target cleaning time is set so that the control module can control the opening and closing of the valve to realize the forward and back washing of the filter element. The valve is repeatedly opened and closed according to the target cleaning time to realize the setting of the forward and back washing time of the filter element.

[0072] In some embodiments of this application, the control module controls the opening and closing of the first valve 51, the second valve 52, the third valve 53, the fourth valve 54, the fifth valve 55, and the sixth valve 56 according to the target cleaning duration, including:

[0073] When cleaning begins, the control module controls the first valve 51, the second valve 52, the third valve 53 and the fourth valve 54 to open, and controls the fifth valve 55 and the sixth valve 56 to close.

[0074] When the target cleaning time has elapsed, the control module controls the first valve 51, the second valve 52, the fifth valve 55 and the sixth valve 56 to open, and controls the third valve 53 and the fourth valve 54 to close.

[0075] In this embodiment, when cleaning begins, the cleaning water pump 2 operates. The control module controls the first valve 51, the second valve 52, the third valve 53, and the fourth valve 54 to open, and controls the fifth valve 55 and the sixth valve 56 to close. The cleaning water enters the precision filter 3 through the first interface 31 via the first pipeline 41 to clean the filter element, exits from the second interface 32 of the precision filter 3, and returns to the cleaning water tank 1 via the second pipeline 42, thus achieving forward cleaning of the precision filter 3 filter element. When the target cleaning time has elapsed, the control module controls the first valve 51, the second valve 52, the fifth valve 55, and the sixth valve 56 to open, and controls the third valve 53 and the fourth valve 54 to close. The cleaning water enters the precision filter 3 through the second interface 32 via the first pipeline 41, the third pipeline 43, and the second pipeline 42, and returns to the cleaning water tank 1 via the fourth pipeline 44, thus achieving backwashing of the precision filter 3 filter element.

[0076] In some embodiments of this application, the acquisition module includes a suspended solids detector, which is used to detect the suspended solids content in the water filtered by the precision filter during operation.

[0077] In some embodiments of this application, a specific method for the processing module to determine the impurity accumulation content is disclosed. The processing module is provided with a preset suspended matter content matrix S0, which is set as S0(S1, S2, S3, S4), where S1 is the first preset suspended matter content, S2 is the second preset suspended matter content, S3 is the third preset suspended matter content, and S4 is the fourth preset suspended matter content, and S1 < S2 < S3 < S4.

[0078] A preset impurity accumulation content matrix Z0 is defined as Z0(Z1, Z2, Z3, Z4), where Z1 is the first preset impurity accumulation content, Z2 is the second preset impurity accumulation content, Z3 is the third preset impurity accumulation content, and Z4 is the fourth preset impurity accumulation content, and Z1 < Z2 < Z3 < Z4.

[0079] The processing module is used to obtain the suspended solids content s of the water filtered by the precision filter, and to set the impurity accumulation content of the precision filter element according to the relationship between the suspended solids content s and the preset suspended solids content.

[0080] When s < S1, the first preset impurity accumulation content Z1 is set as the impurity accumulation content of the precision filter element.

[0081] When S1≤s<S2, the second preset impurity accumulation content Z2 is set as the impurity accumulation content of the precision filter element.

[0082] When S2≤s<S3, the third preset impurity accumulation content Z3 is set as the impurity accumulation content of the precision filter element.

[0083] When S3≤s<S4, the fourth preset impurity accumulation content Z4 is set as the impurity accumulation content of the precision filter element.

[0084] In some embodiments of this application, a specific method for the processing module to correct the impurity accumulation content is disclosed. The processing module is provided with a preset working time matrix T0, which is set as T0(T1, T2, T3, T4), where T1 is the first preset working time, T2 is the second preset working time, T3 is the third preset working time, T4 is the fourth preset working time, and T1 < T2 < T3 < T4.

[0085] A preset impurity accumulation content correction matrix a0 is defined, and a0(a1, a2, a3, a4) is set, where a1 is the first preset correction coefficient, a2 is the second preset correction coefficient, a3 is the third preset correction coefficient, a4 is the fourth preset correction coefficient, and 1 < a1 < a2 < a3 < a4 < 1.2.

[0086] After the processing module sets the i-th preset impurity accumulation content Zi as the impurity accumulation content of the precision filter element based on the suspended solids content s, i = 1, 2, 3, 4; it obtains the working time t of the precision filter, selects the corresponding correction coefficient according to the relationship between the working time t and each preset working time, and corrects the impurity accumulation content Zi of the precision filter element to obtain the final impurity accumulation content f.

[0087] When t < T1, the first preset correction coefficient a1 is selected to correct the impurity accumulation content Zi of the precision filter element, and the final impurity accumulation content f after correction is Zi * a1.

[0088] When T1≤t<T2, the second preset correction coefficient a2 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content f after correction is Zi*a2.

[0089] When T2≤t<T3, the third preset correction coefficient a3 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content f after correction is Zi*a3.

[0090] When T3≤t<T4, the fourth preset correction coefficient a4 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content f after correction is Zi*a4.

[0091] In this embodiment, since the longer the precision filter element is used, the more impurities it filters, the impurity accumulation content of the filter element is corrected by the usage time of the precision filter to obtain the final impurity accumulation content.

[0092] In some embodiments of this application, a specific method for the processing module to determine the power supply frequency of the cleaning water pump is disclosed. The processing module is provided with a preset final impurity accumulation content matrix F0, which is set as F0(F1, F2, F3, F4), where F1 is the first preset final impurity accumulation content, F2 is the second preset final impurity accumulation content, F3 is the third preset final impurity accumulation content, F4 is the fourth preset final impurity accumulation content, and F1 < F2 < F3 < F4.

[0093] The preset power supply frequency matrix H0 for the cleaning water pump is set as H0(H1, H2, H3, H4), where H1 is the first preset power supply frequency, H2 is the second preset power supply frequency, H3 is the third preset power supply frequency, and H4 is the fourth preset power supply frequency, and H1 < H2 < H3 < H4.

[0094] The processing module is used to obtain the final impurity accumulation content f, and set the power supply frequency of the cleaning water pump according to the relationship between the final impurity accumulation content f and each preset final impurity accumulation content.

[0095] When f < F1, the first preset power supply frequency H1 is set as the power supply frequency of the cleaning water pump.

[0096] When F1≤f<F2, the second preset power supply frequency H2 is set as the power supply frequency of the cleaning water pump.

[0097] When F2≤f<F3, the third preset power supply frequency H3 is set as the power supply frequency of the cleaning water pump.

[0098] When F3≤f<F4, the fourth preset power supply frequency H4 is set as the power supply frequency of the cleaning water pump.

[0099] In this embodiment, a variable frequency water pump is used for cleaning, which facilitates control of the power supply frequency of the cleaning water pump and enables accurate online cleaning. Furthermore, when the control module starts the cleaning water pump, it also controls the opening and closing of several valves to clean the precision filter element.

[0100] To further illustrate the precision filter online automatic cleaning system described in this invention, this invention also discloses a precision filter online automatic cleaning method, applicable to a precision filter online automatic cleaning system including a cleaning water tank, a cleaning water pump, a precision filter, and a control system, such as... Figure 3 As shown, the method includes:

[0101] S1, acquire the working status data of the precision filter and transmit the acquired working status data to the processing module. The working status data includes the suspended solids content of the water filtered by the precision filter and the working time of the precision filter.

[0102] S2, set the working status command of the cleaning water pump according to the working status data.

[0103] S3, control the working state of the cleaning water pump according to the working state command set by the processing module, so as to clean the precision filter.

[0104] To explain in detail the specific operating methods for setting the working status commands of the cleaning water pump, such as... Figure 4 As shown, the method for setting the operating status command of the cleaning water pump in the processing module includes:

[0105] S201, determine the impurity accumulation content of the precision filter element based on the suspended solids content of the water filtered by the precision filter.

[0106] S202, Based on the working time of the precision filter, the impurity accumulation content is corrected to obtain the final impurity accumulation content.

[0107] S203, determine the power supply frequency of the cleaning water pump based on the final impurity accumulation content.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

[0109] The system provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiments can be merged into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the various modules or steps and are not considered as an improper limitation of the present invention.

[0110] Those skilled in the art will recognize that the modules and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. The programs corresponding to the software modules and method steps can be placed in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. To clearly illustrate the interchangeability of electronic hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the invention.

Claims

1. An online automatic cleaning system for precision filters, characterized in that, include: The system includes a cleaning water tank, a cleaning water pump, a precision filter, and a control system. The cleaning water tank is connected to the precision filter via the cleaning water pump, and the control system is connected to the cleaning water pump. The control system is used to manage and control the cleaning water pump. The control system includes a data acquisition module, a processing module, and a control module. The data acquisition module is used to acquire the operating status data of the precision filter and transmit the acquired operating status data to the processing module. The operating status data includes the suspended solids content of the water filtered by the precision filter and the operating time of the precision filter. The processing module is used to set the working status command of the cleaning water pump according to the working status data. The control module is used to control the working status of the cleaning water pump according to the working status instructions set by the processing module. The processing module is used to determine the impurity accumulation content of the precision filter element based on the suspended solids content of the water filtered by the precision filter; to correct the impurity accumulation content based on the working time of the precision filter to obtain the final impurity accumulation content; and to determine the power supply frequency of the cleaning water pump based on the final impurity accumulation content.

2. The precision filter online automatic cleaning system according to claim 1, characterized in that, The cleaning water tank is provided with an outlet and an inlet. The precision filter is provided with a first interface and a second interface. The outlet is connected to the first interface via a first pipeline. A first valve, a cleaning water pump, a second valve, and a third valve are sequentially arranged on the first pipeline. The second interface is connected to the inlet via a second pipeline. A fourth valve is arranged on the second pipeline. The first pipeline between the second valve and the third valve is connected to the second pipeline between the fourth valve and the second interface via a third pipeline. A fifth valve is arranged on the third pipeline. The first pipeline between the third valve and the first interface is connected to the second pipeline between the fourth valve and the inlet via a fourth pipeline. A sixth valve is arranged on the fourth pipeline.

3. The precision filter online automatic cleaning system according to claim 2, characterized in that, The first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve are all solenoid valves and are connected to a control system. The control system is used to control the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve.

4. The precision filter online automatic cleaning system according to claim 3, characterized in that, The control module within the control system is set with a target cleaning duration. The control module is used to control the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve according to the target cleaning duration.

5. The precision filter online automatic cleaning system according to claim 4, characterized in that, The control module controls the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve according to the target cleaning duration, including: When cleaning begins, the control module controls the first valve, the second valve, the third valve, and the fourth valve to open, and controls the fifth valve and the sixth valve to close. When the target cleaning time has elapsed, the control module controls the first valve, the second valve, the fifth valve, and the sixth valve to open, and controls the third valve and the fourth valve to close.

6. The precision filter online automatic cleaning system according to claim 1, characterized in that, The acquisition module includes a suspended solids detector, which is used to detect the suspended solids content in the water filtered by the precision filter during operation.

7. The precision filter online automatic cleaning system according to claim 1, characterized in that, The processing module is equipped with a preset suspended solids content matrix S0, which is set as S0(S1, S2, S3, S4), where S1 is the first preset suspended solids content, S2 is the second preset suspended solids content, S3 is the third preset suspended solids content, and S4 is the fourth preset suspended solids content, and S1 < S2 < S3 < S4. A preset impurity accumulation content matrix Z0 is defined as Z0(Z1, Z2, Z3, Z4), where Z1 is the first preset impurity accumulation content, Z2 is the second preset impurity accumulation content, Z3 is the third preset impurity accumulation content, and Z4 is the fourth preset impurity accumulation content, and Z1 < Z2 < Z3 < Z4. The processing module is used to obtain the suspended solids content s of the water filtered by the precision filter, and to set the impurity accumulation content of the precision filter element according to the relationship between the suspended solids content s and the preset suspended solids content. When s < S1, the first preset impurity accumulation content Z1 is set as the impurity accumulation content of the precision filter element; When S1≤s<S2, the second preset impurity accumulation content Z2 is set as the impurity accumulation content of the precision filter element; When S2≤s<S3, the third preset impurity accumulation content Z3 is set as the impurity accumulation content of the precision filter element; When S3≤s<S4, the fourth preset impurity accumulation content Z4 is set as the impurity accumulation content of the precision filter element.

8. The precision filter online automatic cleaning system according to claim 7, characterized in that, The processing module is equipped with a preset working time matrix T0, which is set as T0(T1, T2, T3, T4), where T1 is the first preset working time, T2 is the second preset working time, T3 is the third preset working time, T4 is the fourth preset working time, and T1 < T2 < T3 < T4. A preset impurity accumulation content correction matrix a0 is defined, and a0(a1, a2, a3, a4) is set, where a1 is the first preset correction coefficient, a2 is the second preset correction coefficient, a3 is the third preset correction coefficient, a4 is the fourth preset correction coefficient, and 1 < a1 < a2 < a3 < a4 < 1.

2. After the processing module sets the i-th preset impurity accumulation content Zi as the impurity accumulation content of the precision filter element based on the suspended solids content s, i = 1, 2, 3, 4; it obtains the working time t of the precision filter, selects the corresponding correction coefficient according to the relationship between the working time t and each preset working time, and corrects the impurity accumulation content Zi of the precision filter element to obtain the final impurity accumulation content f. When t < T1, the first preset correction coefficient a1 is selected to correct the impurity accumulation content Zi of the precision filter element, and the final impurity accumulation content f after correction is Zi * a1. When T1≤t<T2, the second preset correction coefficient a2 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content after correction is f=Zi*a2; When T2≤t<T3, the third preset correction coefficient a3 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content after correction is f=Zi*a3; When T3≤t<T4, the fourth preset correction coefficient a4 is selected to correct the impurity accumulation content Zi of the precision filter element. The final impurity accumulation content f after correction is Zi*a4.

9. The precision filter online automatic cleaning system according to claim 8, characterized in that, The processing module is equipped with a preset final impurity accumulation content matrix F0, which is set as F0(F1, F2, F3, F4), where F1 is the first preset final impurity accumulation content, F2 is the second preset final impurity accumulation content, F3 is the third preset final impurity accumulation content, F4 is the fourth preset final impurity accumulation content, and F1 < F2 < F3 < F4. The preset power supply frequency matrix H0 for the cleaning water pump is set as H0(H1, H2, H3, H4), where H1 is the first preset power supply frequency, H2 is the second preset power supply frequency, H3 is the third preset power supply frequency, and H4 is the fourth preset power supply frequency, and H1 < H2 < H3 < H4. The processing module is used to obtain the final impurity accumulation content f, and set the power supply frequency of the cleaning water pump according to the relationship between the final impurity accumulation content f and each preset final impurity accumulation content. When f < F1, the first preset power supply frequency H1 is set as the power supply frequency of the cleaning water pump; When F1≤f<F2, the second preset power supply frequency H2 is set as the power supply frequency of the cleaning water pump; When F2≤f<F3, the third preset power supply frequency H3 is set as the power supply frequency of the cleaning water pump; When F3≤f<F4, the fourth preset power supply frequency H4 is set as the power supply frequency of the cleaning water pump.

10. A method for online automatic cleaning of a precision filter, characterized in that, This system is applied to an online automatic cleaning system for precision filters, which includes a cleaning water tank, a cleaning water pump, a precision filter, and a control system. The method includes: The working status data of the precision filter is acquired and transmitted to the processing module. The working status data includes the suspended solids content of the water filtered by the precision filter and the working time of the precision filter. The working status command of the cleaning water pump is set according to the working status data; The working state of the cleaning water pump is controlled according to the working state instructions set by the processing module in order to clean the precision filter. The method of setting the operating status command of the cleaning water pump based on the operating status data includes: The impurity accumulation content of the precision filter element is determined based on the suspended solids content of the water filtered by the precision filter. Based on the working time of the precision filter, the impurity accumulation content is corrected to obtain the final impurity accumulation content; The power supply frequency of the cleaning water pump is determined based on the final impurity accumulation content.

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