Self-cleaning sewage recycling treatment system and intelligent control method thereof

Abstract

The application discloses a self-cleaning sewage recycling treatment system and an intelligent control method thereof, and relates to the technical field of sewage treatment. The treatment system comprises a sewage treatment module and an intelligent control module, the sewage treatment module comprises a main water pump, a centrifuge, a ceramic membrane filtration module, a water quality monitoring sensor and an auxiliary water pump which are connected in series through pipelines, and a water storage tank, a bypass pipeline is connected between the outlet end of the centrifuge and the water inlet end of the water quality monitoring sensor, and a circulating pipeline is connected to the water outlet end of the auxiliary water pump. The intelligent control module controls whether the ceramic membrane filtration module performs sewage treatment work according to water quality information measured by the water quality monitoring sensor. The ceramic membrane filtration module is used as a standby module of the sewage treatment module, the ceramic membrane filtration module is not used when the centrifuge can meet the demand, and the ceramic membrane filtration module is connected into the system for use when the centrifuge cannot meet the sewage treatment demand, so that high efficiency and energy saving are realized.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to a self-cleaning wastewater recycling system and its intelligent control method. Background Technology

[0002] Water is the most precious resource for mankind. In human life and industrialization, a large amount of wastewater is generated. For example, coal mining produces a large amount of mine water, which contains a lot of coal slurry and various suspended solids. In daily life, there is also wastewater containing hair from bathing and wastewater from washing vegetables and rice in the kitchen. Industrial production also produces turbid liquids containing a large amount of suspended solids.

[0003] The existing wastewater treatment technology route basically involves deep treatment of wastewater through steps such as centralized sedimentation, flocculant addition, filtration, chemical treatment, and disinfection before reuse. This technology route has a long wastewater treatment cycle, complex equipment, large footprint of wastewater sedimentation tanks, high infrastructure costs, high energy consumption, and poor economic and environmental performance. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems in the prior art and provide a self-cleaning wastewater recycling and reuse treatment system and its intelligent control method. This system treats wastewater containing suspended solids, has a short process flow, large water treatment capacity, requires no water treatment agent, occupies a small area, has a self-cleaning function, requires no manual cleaning and maintenance, has low operating and maintenance costs, is highly efficient and energy-saving, has a long service life, and is safe and reliable.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A self-cleaning wastewater recycling and treatment system includes a wastewater treatment module and an intelligent control module. The wastewater treatment module includes a main water pump, a centrifuge, a ceramic membrane filter module, a water quality monitoring sensor, an auxiliary water pump, and a water storage tank, connected in series via pipelines. The inlet of the main water pump is connected to a wastewater source via a water pipe to pump wastewater into the centrifuge for centrifugation. The ceramic membrane filter module is used to filter the wastewater in the system if the water quality filtered by the centrifuge does not meet the standards. A bypass pipeline connected in parallel with the ceramic membrane filter module is connected between the outlet of the centrifuge and the inlet of the water quality monitoring sensor. The outlet of the auxiliary water pump is connected to a circulation pipeline connected to the wastewater source. The intelligent control module controls whether the ceramic membrane filter module performs wastewater treatment based on the water quality information measured by the water quality monitoring sensor.

[0007] Furthermore, it also includes a high-pressure water cleaning module, which includes a booster pump that provides pressure water for cleaning the centrifuge and the ceramic membrane filter module. The inlet of the booster pump is connected to a clean water source through a pipeline.

[0008] Furthermore, the intelligent control module also includes an electromagnetic flow control valve, a first electronic flow meter, a first electric valve, a second electric valve, a second electronic flow meter, a third electric valve, a fourth electric valve, a fifth electric valve, a sixth electric valve, and an intelligent control cabinet. The intelligent control module is installed in the intelligent control cabinet. The first electronic flow meter is connected in series at the inlet of the main water pump. The electromagnetic flow control valve is connected in series at the inlet of the first electronic flow meter. The first electric valve is installed in the bypass pipeline. The second electric valve is connected in series at the inlet of the ceramic membrane filter module. The second electronic flow meter is connected in series at the outlet of the ceramic membrane filter module. The third electric valve... The fourth electric valve is connected in series at the outlet end of the second electronic flow meter; the fifth electric valve is connected in series between the auxiliary water pump and the water storage tank; the sixth electric valve is installed in the circulation pipeline; the intelligent control module is electrically connected to the electromagnetic flow control valve, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the main water pump, the centrifuge, the ceramic membrane filter module, and the auxiliary water pump via a data cable and controls the status of the equipment; the intelligent control module is also connected to the first electronic flow meter, the second electronic flow meter, and the water quality monitoring sensor and collects the measurement data information of the equipment.

[0009] Furthermore, it also includes a waste liquid storage tank, and the waste liquid discharged from the centrifuge and ceramic membrane filtration module is connected to the waste liquid storage tank through a drain pipe, thereby discharging the waste liquid into the waste liquid storage tank.

[0010] Furthermore, the water quality monitoring sensor is a water turbidity monitoring sensor; the electromagnetic flow control valve is a proportional electromagnetic flow control valve. The electric valve is an on / off type valve used to control the opening and closing of the pipeline. The centrifuge is a frequency converter driven centrifuge.

[0011] Furthermore, the clean water source is municipal tap water or treated clean water.

[0012] Furthermore, the ceramic membrane filter module includes a filter module housing and a ceramic membrane core disposed within the inner cavity of the filter module housing. A sewage inlet pipe and a sewage outlet pipe, communicating with the inner cavity of the filter module housing, are disposed on the side wall of the filter module housing, with the sewage inlet pipe and sewage outlet pipe positioned opposite each other on both sides of the filter module housing. The upper end of the ceramic membrane core is connected to a cleaning water inlet main pipe located outside the filter module housing via a cleaning water inlet branch pipe, and the lower end of the ceramic membrane core is connected to a filter water collection main pipe located outside the filter module housing via a filter water collection branch pipe. The sewage inlet pipe is connected to the outlet of a second electric valve, the sewage outlet pipe is connected to a waste liquid storage tank, the cleaning water inlet main pipe is connected to the outlet of a booster pump to introduce pressurized cleaning water into the ceramic membrane filter module, and the filter water collection branch pipe is connected to the inlet of a second electronic flow meter so that the filtered water is introduced into a water storage tank through pipelines.

[0013] The present invention also provides an intelligent control method for a self-cleaning wastewater recycling and reuse treatment system, which is applied to the above-mentioned self-cleaning wastewater recycling and reuse treatment system, and specifically includes the following steps:

[0014] S11, the intelligent control module controls the electromagnetic flow control valve to open to the initial opening degree, controls the first electronic flow meter, the second electronic flow meter, and the water quality monitoring sensor to start and collect information from the device, controls the first electric valve, the fourth electric valve, and the fifth electric valve to remain closed, and controls the second electric valve, the third electric valve, and the sixth electric valve to open.

[0015] S21, the intelligent control module controls the centrifuge to start and reach the rated speed, and controls the main water pump and auxiliary water pump to start;

[0016] S31, based on the collected information, determine whether the water quality information collected by the water quality monitoring sensor meets the requirements for clean water quality; if the collected water quality information does not meet the requirements, control the increase of the real-time speed of the centrifuge.

[0017] S41, if the collected water quality information meets the requirements, the real-time opening of the electromagnetic flow control valve is controlled to adjust the real-time flow of the first electronic flow meter so that the real-time flow of the first electronic flow meter meets the user's set flow value.

[0018] S51 controls the ceramic membrane filter module to shut down, controls the second and third electric valves to shut down, and controls the first electric valve to open.

[0019] S61, determine whether the water quality information collected by the water quality monitoring sensor meets the requirements for clean water quality. If the collected water quality information does not meet the requirements, control the increase of the real-time speed of the centrifuge. When the real-time speed of the centrifuge is greater than the maximum speed of the centrifuge, control the opening of the ceramic membrane filter module, control the opening of the second electric valve and the third electric valve, and close the first electric valve.

[0020] S71, if the water quality information collected by the water quality monitoring sensor meets the requirements for clean water, the fifth electric valve is opened and the sixth electric valve is closed, and the water that meets the requirements is discharged into the water storage tank for storage and standby, and the system performs sewage treatment.

[0021] Intelligent control methods also include shutdown control methods, including:

[0022] Upon receiving a shutdown command, the system controls the fifth electric valve to close and the sixth electric valve to open; then it controls the main water pump and auxiliary water pump to shut down, followed by the electronic flow control valve and the variable frequency centrifuge to shut down; it controls the first, second, third, and fourth electric valves to close, and controls the first electronic flow meter, the second electronic flow meter, and the water quality monitoring sensor to shut down, thus shutting down the system.

[0023] The intelligent control method also includes a high-pressure water cleaning module control method, which includes the following steps:

[0024] S12, confirm that the centrifuge and ceramic membrane filter module are in the off state;

[0025] S22, open the fourth electric valve and start the booster water pump. The booster water pump will pump the clean water from the clean water source into the centrifuge and ceramic membrane filter module for cleaning.

[0026] S32, collects the duration of high-pressure water system cleaning;

[0027] S42, if the high-pressure water system cleaning time is longer than the set time, shut down the booster pump and the fourth electric valve to end the cleaning process.

[0028] Furthermore, the control method also includes a high-pressure water cleaning module control method, comprising the following steps:

[0029] S52, confirm that the ceramic membrane filter module is in the on state;

[0030] S62, if the difference between the actual flow rate of the first electronic flow meter and the actual flow rate of the second electronic flow meter is greater than the set flow rate difference, open the fourth electric valve and start the booster water pump. The booster water pump will pump the clean water from the clean water source into the centrifuge and ceramic membrane filter module for cleaning.

[0031] S72, collects the duration of high-pressure water system cleaning;

[0032] S82, if the high-pressure water system cleaning time is longer than the set time, shut down the booster pump and the fourth electric valve to end the cleaning process.

[0033] This invention provides a self-cleaning wastewater recycling and reuse treatment system and its intelligent control method, which has the following beneficial effects: This system is used in industrial production, fire-fighting water, and reclaimed water applications where the requirements for chemical ions in the water are not high; water treated by this wastewater treatment module can also be sent to a secondary treatment system for further treatment before being used as daily drinking water; This system uses a combination of centrifuge and ceramic membrane filter module for wastewater treatment. When the centrifuge can meet the system's water treatment needs, the ceramic membrane filter module is shielded. Because the ceramic membrane has a small pore size, it requires frequent high-pressure water backwashing during wastewater treatment. For energy saving and economy, the ceramic membrane filter module is used as a backup module for the wastewater treatment module. It is not used when the centrifuge can meet the needs, and when the centrifuge cannot meet the wastewater treatment needs, the ceramic membrane filter module is connected in series with the system for use, achieving high efficiency and energy saving; This system has simple equipment, a large wastewater treatment capacity, and a short treatment cycle; The unique high-pressure water cleaning module has a self-cleaning function, eliminating the need for manual cleaning and simplifying operation and maintenance. Attached Figure Description

[0034] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings:

[0035] Figure 1 This is a schematic diagram of a self-cleaning wastewater recycling and reuse treatment system according to the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of a ceramic membrane filter module in a self-cleaning wastewater recycling and reuse treatment system of the present invention;

[0037] Figure 3 This is a control logic flowchart of an intelligent control method for a self-cleaning wastewater recycling and reuse treatment system according to the present invention.

[0038] Figure 4 This is a flowchart of the system shutdown control logic in the intelligent control method of a self-cleaning wastewater recycling and reuse treatment system of the present invention.

[0039] Figure 5 This is a flowchart illustrating the control logic of the high-pressure water cleaning module during full-load operation in the intelligent control method of a self-cleaning wastewater recycling and reuse treatment system of the present invention.

[0040] The diagram labels are as follows: 1. Wastewater source; 2. Electromagnetic flow control valve; 3. First electronic flow meter; 4. Main water pump; 5. Centrifuge; 6. Waste liquid storage tank; 7. First electric valve; 8. Second electric valve; 9. Ceramic membrane filter module; 91. Wastewater inlet pipe; 92. Ceramic membrane core; 93. Filter module housing; 94. Filter water collection branch pipe; 95. Filter water collection main pipe; 96. Sewage pipe; 97. Cleaning water inlet branch pipe; 98. Cleaning water inlet main pipe; 10. Second electronic flow meter; 11. Third electric valve; 12. Booster pump; 13. Fourth electric valve; 14. Clean water source; 15. Water quality monitoring sensor; 16. Auxiliary water pump; 17. Fifth electric valve; 18. Sixth electric valve; 19. Water storage tank; 20. Intelligent control cabinet. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that in the embodiments of the present invention, all directional indications (such as up-down-left-right-forward-backward...) are only used to explain the relative positional relationship and movement between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0044] like Figures 1-2 As shown, a self-cleaning wastewater recycling and reuse system includes a wastewater treatment module, a high-pressure water cleaning module, and an intelligent control module. The wastewater treatment module includes a main water pump 4, a centrifuge 5, a ceramic membrane filter module 9, a water quality monitoring sensor 15, an auxiliary water pump 16, a water storage tank 19, and a waste liquid storage pool 6. The high-pressure water cleaning module includes a booster pump 12 that provides pressure water for cleaning the centrifuge 5 and the ceramic membrane filter module 9. The inlet of the booster pump 12 is connected to a clean water source 14 via a pipeline. The intelligent control module also includes an electromagnetic flow control valve 2, a first electronic flow meter 3, a first electric valve 7, a second electric valve 8, a second electronic flow meter 10, a third electric valve 11, a fourth electric valve 13, a fifth electric valve 17, a sixth electric valve 18, and an intelligent control cabinet 20.

[0045] The electromagnetic flow control valve 2, the first electronic flow meter 3, the main water pump 4, the centrifuge 5, the second electric valve 8, the ceramic membrane filter module 9, the second electronic flow meter 10, the third electric valve 11, the water quality monitoring sensor 15, the auxiliary water pump 16, the fifth electric valve 17, and the water storage tank 19 are connected in series through pipelines. The inlet of the main water pump 4 is connected to the sewage source 1 through a water pipe to pump the sewage into the centrifuge 5 for centrifugal treatment.

[0046] A bypass pipeline connected in parallel with the ceramic membrane filter module 9 is connected between the outlet end of the centrifuge 5 and the inlet end of the water quality monitoring sensor 15. The first electric valve 7 is installed in the bypass pipeline. The bypass pipeline connects the outlet end of the centrifuge 5 and the inlet end of the water quality monitoring sensor 15, thereby shielding the ceramic membrane filter module 9 when the centrifuge 5 can treat the sewage to a qualified standard. The treated qualified water is then directly guided to the water quality monitoring sensor 15 without passing through the ceramic membrane filter module 9 and further transported to the water storage tank 19.

[0047] The outlet of the auxiliary water pump 16 is connected to a circulation pipeline connected to the sewage source 1, and the sixth electric valve 18 is installed in the circulation pipeline; the circulation pipeline is used to connect the outlet of the auxiliary water pump 16 to the sewage source 1 so as to introduce the treated unqualified water into the sewage source 1.

[0048] The ceramic membrane filter module 9 is used to filter wastewater in the system when the water quality filtered by the centrifuge 5 fails to meet the standards. The intelligent control cabinet 20 is equipped with an intelligent control module, which is electrically connected to the electromagnetic flow control valve 2, the first electric valve 7, the second electric valve 8, the third electric valve 11, the fourth electric valve 13, the fifth electric valve 17, the sixth electric valve 18, the main water pump 4, the centrifuge 5, the ceramic membrane filter module 9, and the auxiliary water pump 16 via data cables and controls the status of the equipment. The intelligent control module is also connected to the first electronic flow meter 3, the second electronic flow meter 10, and the water quality monitoring sensor 15 and collects the measurement data information of the equipment.

[0049] The waste liquid processed by the centrifuge 5 and ceramic membrane filter module 9 is discharged into the waste liquid storage tank 6 via a drain pipe 96. The water quality monitoring sensor 15 is a water turbidity monitoring sensor; the electromagnetic flow control valve 2 is a proportional electromagnetic flow control valve; the electric valve is an on / off valve used to control the opening and closing of the pipeline; the centrifuge 5 is a frequency converter-driven centrifuge 5, which facilitates control of the centrifuge speed; and the clean water source 14 uses municipal tap water or treated clean water.

[0050] In this invention, the ceramic membrane filter module 9 includes a filter module housing 93 and a ceramic membrane core 92 disposed within the cavity of the filter module housing 93. A wastewater inlet pipe 91 and a drain pipe 96, communicating with the cavity of the filter module housing 93, are disposed on the side wall of the filter module housing 93. The wastewater inlet pipe 91 and the drain pipe 96 are disposed opposite to each other on both sides of the filter module housing 93. The upper end of the ceramic membrane core 92 is connected to a cleaning water inlet main pipe 98 located outside the filter module housing 93 via a cleaning water inlet branch 97. The lower end of the ceramic membrane core 92 is connected to the main filter water collection pipe 95 located outside the filter module housing 93 via a filter water collection branch pipe 94; the sewage inlet pipe 91 is connected to the outlet of the second electric valve 8; the sewage discharge pipe 96 is connected to the waste liquid storage tank 6; the cleaning water inlet main pipe 98 is connected to the outlet of the booster pump 12 to introduce pressurized cleaning water into the ceramic membrane filter module 9; and the filter water collection branch pipe 94 is connected to the inlet of the second electronic flow meter 10 so that the filtered water is introduced into the water storage tank 19 through the pipeline.

[0051] This embodiment provides an intelligent control method for a self-cleaning wastewater recycling and reuse treatment system, applied to the aforementioned self-cleaning wastewater recycling and reuse treatment system, specifically including the following control method:

[0052] The parameters in the following control method embodiments are explained as follows:

[0053] N0 - Initial opening degree of electromagnetic flow control valve;

[0054] N-real electromagnetic flow control valve real-time opening degree;

[0055] L0 - Centrifuge rated speed;

[0056] L-real-time centrifuge speed;

[0057] Lmax - Maximum centrifuge speed;

[0058] Q1 Real-time flow rate of the first electronic flow meter;

[0059] Q2 Real-time flow rate of the second electronic flow meter;

[0060] Q-Settings - User-defined traffic volume;

[0061] △Q - Set the flow rate difference;

[0062] ξ0 - Water turbidity setpoint;

[0063] ξ - Real-time monitoring value of water turbidity;

[0064] T-Cleaning - Duration of high-pressure water system cleaning;

[0065] T-Set - High-pressure water system cleaning setting time.

[0066] like Figure 3 As shown, a self-cleaning wastewater recycling and treatment system is controlled according to the following process:

[0067] S01, process begins, system boots up.

[0068] S11, Start-up preparation begins. First, high-pressure water flushing is performed. After cleaning, the following operations are performed: Electromagnetic flow control valve 2 is opened to the initial opening degree N0, the first electronic flow meter 3, the second electronic flow meter 10, and the water quality turbidity monitoring sensor are powered on and started, the first electric valve 7, the fourth electric valve 13, and the fifth electric valve 17 remain closed, and the second electric valve 8, the third electric valve 11, and the sixth electric valve 18 are opened.

[0069] This step limits the flow rate when the unit is first started and connects the ceramic membrane filter module 9 to the wastewater treatment module. When the unit is first started, the fifth electric valve 17 remains closed and the sixth electric valve 18 is opened to form a closed internal circulation, preventing substandard treated water from flowing directly into the water storage tank 19.

[0070] S21, the variable frequency centrifuge 5 starts and is turned up to the rated speed L0.

[0071] S31, main water pump 4 and auxiliary water pump 16 are turned on.

[0072] S41, based on the collected information, determine whether the real-time monitoring value of water turbidity ξ is ≤ the water turbidity set value ξ0. If it is, increase the real-time speed L of centrifuge 5; and repeat the above steps to determine this.

[0073] S51, if the collected water quality information meets the requirements, then continue to determine whether the real-time flow rate Q1 of the first electronic flow meter is equal to the user-set flow rate Q.

[0074] If the real-time flow rate Q1 of the first electronic flow meter 3 is less than the user-set flow rate Q, then increase the real-time opening N of the electromagnetic flow control valve 2.

[0075] If the real-time flow rate Q1 of the first electronic flow meter 3 is greater than the user-set flow rate Q, then reduce the real-time opening N of the electromagnetic flow control valve 2 and repeat this step.

[0076] S61, shut down the ceramic membrane filter module 9, control the closing of the second electric valve 8 and the third electric valve 11, and open the first electric valve 7.

[0077] This step allows the ceramic membrane filter module 9 to be shielded when the centrifuge 5 can meet the system's water treatment needs. Because the ceramic membrane has a small pore size, it needs to be backwashed frequently with high-pressure water when treating sewage. For energy saving and economy, the ceramic membrane filter module 9 is used as a backup module for sewage treatment. The ceramic membrane filter module 9 is not used when the centrifuge 5 can meet the needs. When the centrifuge 5 cannot meet the sewage treatment needs, the ceramic membrane filter module 9 is connected in series with the system for use.

[0078] S71, based on the water quality information collected by the water quality monitoring sensor (15), determine whether the real-time monitoring value of water turbidity ξ is ≤ the water turbidity set value ξ0;

[0079] If the judgment is negative, increase the real-time speed L of the centrifuge by 5 and perform the following judgment:

[0080] If the real-time rotation speed L of centrifuge 5 is less than or equal to the maximum rotation speed Lmax of centrifuge 5, and the water quality information collected by the water quality monitoring sensor (15) meets the requirements for clean water quality, the closed loop is closed, the fifth electric valve 17 is opened, and the sixth electric valve 18 is closed; the water that meets the requirements is discharged into the water storage tank (19) for storage and standby, and the system performs sewage treatment.

[0081] S81, based on the water quality information collected by the water quality monitoring sensor (15), determine whether the real-time monitoring value of water turbidity ξ is greater than the set value of water turbidity ξ0;

[0082] Then open the ceramic membrane filter module 9, open the fifth electric valve (17), close the sixth electric valve (18), and discharge the qualified water into the water storage tank (19) for storage and standby. The system then performs sewage treatment.

[0083] This step prevents water that does not meet the water quality requirements from being directly discharged into the water storage tank 19 when the unit is first started or during the automatic adjustment process. After the unit is running stably and the water quality meets the requirements, the closed circulation is closed and the water that meets the requirements is discharged into the water storage tank 19 for storage and backup.

[0084] S91, End, System is running stably.

[0085] In specific implementation, such as Figure 4 As shown, the shutdown control method in an intelligent control method for a self-cleaning wastewater recycling and treatment system comprises the following steps:

[0086] 1) To begin the process, press the power button;

[0087] 2) The fifth electric valve 17 is closed, the sixth electric valve 18 is opened, and the system enters a closed loop;

[0088] 3) Main water pump 4 and auxiliary water pump 16 are shut down;

[0089] 4) Electromagnetic flow control valve 2 is closed;

[0090] 5) Turn off the variable frequency centrifuge 5;

[0091] 6) All electric valves and electronic devices are closed;

[0092] 7) End, system shutdown.

[0093] When the system is shut down, the fifth electric valve 17 is kept closed and the sixth electric valve 18 is kept open. At this time, the system is in closed internal circulation to prevent unqualified water from being directly discharged into the clean water storage tank 19.

[0094] In practice, the high-pressure water cleaning module is controlled in two modes. One mode is to control the high-pressure water cleaning when the treatment system is turned on and when it is turned off. The other mode is to control the high-pressure water cleaning when the sewage treatment module is running at full load (i.e., when the ceramic membrane filter module 9 is connected to the system and is in operation).

[0095] In a specific embodiment, the high-pressure water cleaning module controls the system to operate according to the following steps when the system is powered on and when it is fully shut down:

[0096] S12, started when the system is powered on or has completed a shutdown;

[0097] S22, open the fourth electric valve 13, keep the other electric valves closed; start the booster water pump 12 to begin cleaning;

[0098] S32, collects the duration of high-pressure water system cleaning;

[0099] S42, determine whether the high-pressure water system cleaning duration T cleaning is ≥ the high-pressure water system cleaning set time T set. If the determination is yes, the cleaning is completed, and the booster water pump 12 and the fourth electric valve 13 are closed.

[0100] If the condition is otherwise determined, maintain the original state, continue cleaning, and repeat the above determination process;

[0101] End (Cleanup complete, high-pressure water cleaning module shut down).

[0102] The centrifuge 5 and ceramic membrane filter module 9 are cleaned when the sewage system is started and when it is shut down, so that the centrifuge 5 and ceramic membrane filter module 9 can work normally. The cleaning wastewater is discharged with the sewage pipeline.

[0103] In a specific embodiment, such as Figure 5 As shown, when the ceramic membrane filter module 9 is connected to the system and starts working, i.e., when the system is running at full load, the control method for the high-pressure water cleaning module is as follows:

[0104] S52, confirm that the ceramic membrane filter module (9) is in the open state;

[0105] Start (the wastewater system is running at full load, and the ceramic membrane filter module is connected to the system and begins to work).

[0106] S62, determine whether the real-time flow rate Q1 of the first electronic flow meter minus the real-time flow rate Q2 of the second electronic flow meter is greater than or equal to the set flow difference △Q. If the determination is yes, proceed to the next step; if the determination is no, proceed directly to step 36).

[0107] Open the fourth electric valve 13, start the booster water pump 12, and begin cleaning;

[0108] S72, collects the duration of high-pressure water system cleaning;

[0109] S82, determine whether the high-pressure water system cleaning duration T_cleaning is ≥ the high-pressure water system cleaning set time T_set. If yes, proceed to the next step; otherwise, maintain the original state, continue cleaning, and repeat the above judgment.

[0110] Cleaning complete. Turn off booster pump 12 and fourth electric valve 13.

[0111] End (high-pressure water cleaning module shut down).

[0112] With the above scheme, the above control is only activated when the sewage system is running at full load. Because the system priority settings prioritize the use of centrifuge 5 to meet the sewage treatment needs, the ceramic membrane filter module 9 is only used when the system is started or when centrifuge 5 cannot meet the needs and the sewage treatment module needs to run at full load. This is mainly because the ceramic module is prone to clogging and needs to be cleaned frequently, while centrifuge 5 does not need to be cleaned frequently. Therefore, the above control does not need to be executed when the sewage system is not running at full load.

[0113] The parts not covered in this technical solution are the same as or can be implemented using existing technologies.

[0114] The foregoing has shown and described the basic principles, main features, and characteristics of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent control method for a self-cleaning wastewater recycling and reuse treatment system, characterized in that, The self-cleaning wastewater recycling and reuse system includes a wastewater treatment module and an intelligent control module. The intelligent control module controls whether the ceramic membrane filter module (9) performs wastewater treatment based on the water quality information measured by the water quality monitoring sensor (15). The wastewater treatment module includes a main water pump (4), a centrifuge (5), a ceramic membrane filter module (9), a water quality monitoring sensor (15), an auxiliary water pump (16), and a water storage tank (19) connected in series via pipelines. The inlet of the main water pump (4) is connected to the sewage source (1) through a water pipe, and is used to pump the sewage into the centrifuge (5) for centrifugal treatment. The ceramic membrane filter module (9) is used to filter sewage in the system when the water quality filtered by the centrifuge (5) is substandard. The centrifuge (5) is connected to the water inlet of the water quality monitoring sensor (15) via a bypass pipeline that is in parallel with the ceramic membrane filter module (9), and the auxiliary water pump (16) is connected to the water outlet via a circulation pipeline that is connected to the sewage source (1). The self-cleaning wastewater recycling system also includes a high-pressure water cleaning module, which includes a booster pump (12) that provides cleaning pressure water to the centrifuge (5) and the ceramic membrane filter module (9). The inlet of the booster pump (12) is connected to a clean water source (14) through a pipeline. The intelligent control module is installed in the intelligent control cabinet (20). The first electronic flow meter (3) is connected in series to the inlet of the main water pump (4). The electromagnetic flow control valve (2) is connected in series to the inlet of the first electronic flow meter (3). The first electric valve (7) is installed in the bypass pipeline. The second electric valve (8) is connected in series to the inlet of the ceramic membrane filter module (9). The second electronic flow meter (10) is connected in series to the outlet of the ceramic membrane filter module (9). The third electric valve (11) is connected in series to the outlet of the second electronic flow meter (10). The fourth electric valve (13) is connected in series to the inlet of the booster pump (12). The fifth electric valve (17) is connected in series between the auxiliary water pump (16) and the water storage tank (19). The sixth electric valve (18) is installed in the circulation pipeline. The intelligent control method specifically includes the following steps: S11, the intelligent control module controls the electromagnetic flow control valve (2) to open to the initial opening degree, controls the first electronic flow meter (3), the second electronic flow meter (10), and the water quality monitoring sensor (15) to start up and collect equipment information, controls the first electric valve (7), the fourth electric valve (13), and the fifth electric valve (17) to remain closed, and controls the second electric valve (8), the third electric valve (11), and the sixth electric valve (18) to open; S21, the intelligent control module controls the centrifuge (5) to start and reach the rated speed. S31, control the main water pump (4) and auxiliary water pump (16) to start; S41, based on the collected information, determine whether the water quality information collected by the water quality monitoring sensor (15) meets the requirements for clean water quality. If the collected water quality information does not meet the requirements, control the real-time speed of the centrifuge (5) to increase. S51, if the collected water quality information meets the requirements, the real-time opening of the electromagnetic flow control valve (2) is controlled to adjust the real-time flow of the first electronic flow meter (3) so that the real-time flow of the first electronic flow meter (3) meets the requirements of the user-set flow value. S61, control the ceramic membrane filter module (9) to close, control the second electric valve (8) and the third electric valve (11) to close, and open the first electric valve (7); S71, determine whether the water quality information collected by the water quality monitoring sensor (15) meets the requirements for clean water quality. If the collected water quality information does not meet the requirements, control the increase of the real-time speed of the centrifuge (5). When the real-time speed of the centrifuge (5) is greater than the maximum speed of the centrifuge (5), the ceramic membrane filter module (9) is turned on, the second electric valve (8) and the third electric valve (11) are turned on, and the first electric valve (7) is turned off. S81, if the water quality information collected by the water quality monitoring sensor (15) meets the requirements for clean water quality, open the fifth electric valve (17) and close the sixth electric valve (18) to discharge the water that meets the requirements into the water storage tank (19) for storage and backup.

2. The intelligent control method for the self-cleaning wastewater recycling and reuse treatment system according to claim 1, characterized in that: The intelligent control module is connected to the electromagnetic flow control valve (2), the first electric valve (7), the second electric valve (8), the third electric valve (11), the fourth electric valve (13), the fifth electric valve (17), the sixth electric valve (18), the main water pump (4), the centrifuge (5), the ceramic membrane filter module (9), and the auxiliary water pump (16) via data lines and controls the status of the equipment. The intelligent control module is connected to the first electronic flow meter (3), the second electronic flow meter (10), and the water quality monitoring sensor (15) and collects the measurement data information of the equipment.

3. The intelligent control method for the self-cleaning wastewater recycling and reuse treatment system according to claim 2, characterized in that: The self-cleaning wastewater recycling system also includes a waste liquid storage tank (6). The waste liquid discharge end of the centrifuge (5) and the ceramic membrane filter module (9) is connected to the waste liquid storage tank (6) through a drain pipe (96) so that the waste liquid is discharged into the waste liquid storage tank (6).

4. The intelligent control method for the self-cleaning wastewater recycling and reuse treatment system according to claim 2, characterized in that: The water quality monitoring sensor (15) is a water turbidity monitoring sensor; the electromagnetic flow control valve (2) is a proportional electromagnetic flow control valve (2).

5. The intelligent control method for the self-cleaning wastewater recycling and reuse treatment system according to claim 1, characterized in that: The electric valve is a switch-type valve used to control the opening and closing of the pipeline; the centrifuge (5) is a frequency converter driven centrifuge (5).

6. The intelligent control method for the self-cleaning wastewater recycling and reuse treatment system according to claim 2, characterized in that: It also includes a shutdown control method, which comprises the following steps: Upon receiving the shutdown command, control the fifth electric valve (17) to close and control the sixth electric valve (18) to open; then control the main water pump (4) and auxiliary water pump (16) to close, and then control the electromagnetic flow control valve to close and the variable frequency centrifuge (5) to close. Control the first, second, third and fourth electric valves to close, control the first electronic flow meter (3), the second electronic flow meter (10) and the water quality monitoring sensor (15) to close, and the system will shut down.

7. The intelligent control method for the self-cleaning wastewater recycling and reuse treatment system according to claim 6, characterized in that, It also includes a high-pressure water cleaning module control method, which includes the following steps: S12, confirm that the centrifuge (5) and the ceramic membrane filter module (9) are in the off state; S22, open the fourth electric valve (13), start the booster water pump (12), the booster water pump (12) pumps the clean water in the clean water source (14) into the centrifuge (5) and the ceramic membrane filter module (9) for cleaning; S32, collects the duration of high-pressure water system cleaning; S42, if the high-pressure water system cleaning time is greater than the set time, shut down the booster pump (12) and the fourth electric valve (13) to end the cleaning; S52, confirm that the ceramic membrane filter module (9) is in the open state; S62, if the difference between the real-time flow of the first electronic flow meter (3) and the real-time flow of the second electronic flow meter (10) is greater than the set flow difference, open the fourth electric valve (13), start the booster water pump (12), and the booster water pump (12) pumps the clean water in the clean water source (14) into the centrifuge (5) and the ceramic membrane filter module (9) for cleaning. S72, collects the duration of high-pressure water system cleaning; S82, if the high-pressure water system cleaning duration is greater than the set time, shut down the booster pump (12) and the fourth electric valve (13) to end the cleaning process.

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