Immersed ultrafiltration system and control system thereof

Abstract

The invention relates to an immersed ultrafiltration system and a control system thereof, and the immersed ultrafiltration system comprises a membrane pool which is internally provided with an immersed ultrafiltration module; the water inlet end of the clear water tank is detachably connected with the water production port of the immersed ultrafiltration module, and the water outlet end of the clear water tank is connected with water production equipment; a standby ultrafiltration module is arranged in the chemical cleaning pool, and the water inlet end of the chemical cleaning pool is connected with the water outlet end of the clear water tank; and the aeration device is detachably connected with the immersed ultrafiltration module and the standby ultrafiltration module. Raw water enters the membrane pool and then is filtered by the immersed ultrafiltration module, the standby ultrafiltration module is arranged in the chemical cleaning pool, and when chemical cleaning is needed, the immersed ultrafiltration module in the membrane pool is detached and replaced by the standby ultrafiltration module which is cleaned in the chemical cleaning pool, so that the membrane pool can be cleaned. And then the disassembled immersed ultrafiltration module is put into the chemical cleaning pool for chemical cleaning, so that the time for stopping the machine to wait for chemical cleaning can be shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ultrafiltration equipment, and in particular, to an immersion ultrafiltration system and a control system thereof. Background Art

[0002] The raw water of self-contained power plants or heating stations in industrial parks in many areas is converted from the original municipal pipeline industrial water or tap water to the reclaimed water pipeline after purification by the local sewage treatment plant. Since the reclaimed water supply is the purified water from the sewage treatment plant, the water quality of the effluent is unstable and the water quality of the water supply may not meet the raw water quality required by the power plant. Therefore, it is necessary to add immersion ultrafiltration equipment to deepen the treatment of the reclaimed water to ensure the safe and stable operation of the power plant's water production equipment.

[0003] In the related art, when the submerged ultrafiltration equipment is chemically cleaned, it is often necessary to shut down the equipment. However, the chemical cleaning process involves many steps, which results in a long downtime and affects work efficiency. Summary of the invention

[0004] The purpose of the present disclosure is to provide an immersion ultrafiltration system and a control system thereof, which can solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides an immersed ultrafiltration system, comprising: a membrane tank, in which an immersed ultrafiltration module is arranged; a clean water tank, whose water inlet end is detachably connected to the water production port of the immersed ultrafiltration module, and whose water outlet end is connected to a water production device; a chemical cleaning tank, in which a spare ultrafiltration module is arranged, and whose water inlet end is connected to the water outlet end of the clean water tank; and an aeration device, which is detachably connected to the immersed ultrafiltration module and the spare ultrafiltration module.

[0006] Optionally, the water inlet of the chemical cleaning tank is connected to the clean water tank through a chemical cleaning pump, and a first control valve is provided at at least one of the water inlet and water outlet of the chemical cleaning pump, a sewage pump is provided at the water outlet of the chemical cleaning tank, and a second control valve is provided at at least one of the water inlet and water outlet of the sewage pump, a cleaning tank level gauge is provided in the chemical cleaning tank, and a clean water level gauge is provided in the clean water tank.

[0007] Optionally, the submerged ultrafiltration system also includes a mud storage tank, which is connected to the bottom of the membrane tank through a mud collecting pump, and at least one of the mud inlet and mud outlet of the mud collecting pump is provided with a third control valve, the mud outlet of the mud storage tank is connected to the sewage pump and a fourth control valve is provided between the mud outlet and the sewage pump, and a mud level meter is provided in the mud storage tank.

[0008] Optionally, the bottom of the membrane pool is constructed as an inclined structure, and the mud inlet end of the mud collecting pump is connected to the lower end of the inclined structure.

[0009] Optionally, the water inlet end of the membrane pool is connected to the raw water source through a raw water pump, and a sixth control valve is provided at at least one of the water inlet end and the water outlet end of the raw water pump, a water production pump is provided at the water outlet end of the membrane pool, a pressure transmitter is provided at the water inlet end of the water production pump, and a seventh control valve is provided at the water outlet end, and a membrane pool liquid level meter is provided in the membrane pool.

[0010] Optionally, the submerged ultrafiltration system further comprises a backwash pump, the water inlet of the backwash pump being connected to the clean water tank, the water outlet being connected to the submerged ultrafiltration module, and a fifth control valve being provided at at least one of the water inlet and water outlet of the backwash pump.

[0011] Optionally, the submerged ultrafiltration system further comprises a disinfection water tank, wherein the disinfection water tank is arranged between the membrane pool and the clean water tank, and a disinfection water level meter is provided in the disinfection water tank.

[0012] Optionally, the submerged ultrafiltration system further includes a first medicine box, which is connected to the disinfection water tank, and a first dosing pump and an eighth control valve are provided between the first medicine box and the disinfection water tank.

[0013] Optionally, the aeration device is constructed as a Roots blower, and the Roots blower is connected to the submerged ultrafiltration module and the spare ultrafiltration module via a quick-connect plug, and a ninth control valve is provided between the Roots blower and the submerged ultrafiltration module and the spare ultrafiltration module.

[0014] The present disclosure also provides a control system for an immersion ultrafiltration system, comprising: the above-mentioned immersion ultrafiltration system; a detection component; a drive component; and a control module for receiving a detection signal from the detection component and controlling whether the drive component is working.

[0015] Through the above technical scheme, the raw water enters the membrane pool and is filtered through the immersed ultrafiltration module. The filtered water enters the clean water tank to supply water to the water making equipment. A spare ultrafiltration module is provided in the chemical cleaning pool. The aeration device aerates the immersed ultrafiltration module and the spare ultrafiltration module. When chemical cleaning is required, the immersed ultrafiltration module in the membrane pool is removed and replaced with the spare ultrafiltration module that has been cleaned in the chemical cleaning pool. The removed immersed ultrafiltration module is then placed in the chemical cleaning pool for chemical cleaning in preparation for the next use. This can reduce the downtime waiting for chemical cleaning and improve work efficiency.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic structural diagram of an immersed ultrafiltration system in the present disclosure; Figure 2 is a schematic diagram of the structure of the membrane pool in the present disclosure; Figure 3 is a system connection diagram of the control system in the present disclosure.

[0018] Description of Reference Numerals 1. Membrane pool; 2. Mud storage pool; 3. Chemical cleaning pool; 4. Immersed ultrafiltration module; 5. Spare ultrafiltration module; 6. Clean water tank; 7. Disinfectant water tank; 8. Aeration device; 9. Raw water pump; 10. Sixth control valve; 11. Membrane pool level gauge; 12. Mud collection level gauge; 13. Cleaning pool level gauge; 14. Water production pump; 15. Pressure transmitter; 16. Seventh control valve; 17. Clean water level gauge; 18. Disinfectant water level gauge; 19. Backwash pump; 20. Fifth control valve; 21. Mud collecting pump; 22. Third control valve; 23. Sewage pump; 24. Second control valve; 25. Fourth control valve; 26. Chemical cleaning pump; 27. First control valve; 28. First medicine box; 29. ​​First dosing pump; 30. Eighth control valve; 31. Second medicine box; 32. Second dosing pump; 33. Tenth control valve; 34. Ninth control valve; 35. Clean water delivery pump; 100, driving component; 200, detection component; 300, control module. DETAILED DESCRIPTION

[0019] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0020] In the present disclosure, unless otherwise stated, the directional words used, such as "top" and "bottom", generally refer to the top and bottom of the corresponding component in the direction of gravity when in use, and "inside" and "outside" refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first, second, third", etc., are used to distinguish one element from another, and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0021] like Figure 1-2As shown, the present disclosure provides an immersed ultrafiltration system, including: a membrane pool 1, in which an immersed ultrafiltration module 4 is arranged; a clean water tank 6, whose water inlet end is detachably connected to the water outlet of the immersed ultrafiltration module 4, and whose water outlet end is connected to a water production device; a chemical cleaning pool 3, in which a spare ultrafiltration module 5 is arranged, and whose water inlet end is connected to the water outlet end of the clean water tank 6; and an aeration device 8, which is detachably connected to the immersed ultrafiltration module 4 and the spare ultrafiltration module 5.

[0022] Through the above technical scheme, the raw water enters the membrane pool 1 and is filtered through the immersed ultrafiltration module 4, and the filtered water enters the clean water tank 6 to supply water to the water production equipment. The chemical cleaning pool 3 is provided with a spare ultrafiltration module 5, and the aeration device 8 aerates the immersed ultrafiltration module 4 and the spare ultrafiltration module 5. When chemical cleaning is required, the immersed ultrafiltration module 4 in the membrane pool 1 is removed and replaced with the spare ultrafiltration module 5 that has been cleaned in the chemical cleaning pool 3, and then the removed immersed ultrafiltration module 4 is placed in the chemical cleaning pool 3 for chemical cleaning in preparation for the next use. In this way, the downtime waiting time for chemical cleaning can be reduced and work efficiency can be improved.

[0023] As an optional implementation, Figure 1As shown, the water inlet of the chemical cleaning tank 3 is connected to the clean water tank 6 through the chemical cleaning pump 26, and a first control valve 27 is provided at at least one of the water inlet and the water outlet of the chemical cleaning pump 26, a sewage pump 23 is provided at the water outlet of the chemical cleaning tank 3, and a second control valve 24 is provided at at least one of the water inlet and the water outlet of the sewage pump 23, a cleaning tank level gauge 13 is provided in the chemical cleaning tank 3, and a clean water level gauge 17 is provided in the clean water tank 6. The chemical cleaning tank 3 is a device provided to improve the operating efficiency, and whether the membrane needs to be chemically cleaned offline is determined according to the static and operating pressure difference of the pressure transmitter 15. When cleaning is required, the cleaned spare ultrafiltration module 5 is placed in the membrane pool 1, and the submerged ultrafiltration module 4 to be cleaned is placed in the chemical cleaning pool 3, connected to the aeration device 8, and the chemical cleaning step is started to ensure that the liquid level in the clean water tank 6 is sufficient. The first control valve 27 is opened, and the chemical cleaning pump 26 is started. According to the feedback data of the cleaning pool liquid level meter 13, after reaching the set liquid level, the chemical cleaning pump 26 is stopped, the first control valve 27 is closed, and the required chemical cleaning agent is configured in the second medicine box 31, the tenth control valve 33 is opened, and the second dosing pump 32 is started. After adding the preset medicine, the second dosing pump 32 is stopped, the tenth control valve 33 is closed, and the ninth control valve 34 connected to the spare ultrafiltration module 5 is opened, and the aeration device 8 is started to perform aeration cleaning on the submerged ultrafiltration module 4. After the preset aeration cleaning time is completed, it is transferred to immersion cleaning. After the immersion cleaning is completed, the second control valve 24 is opened, and the sewage pump 23 is started to transport the wastewater to the wastewater pool. After the aeration cleaning with chemicals is completed, the water intake step, the aeration step, and the drainage step are repeated to flush the residual chemicals. After the flushing is completed, the chemical cleaning tank 3 is filled with water again and the spare submerged ultrafiltration module 4 is stored for standby use.

[0024] Alternatively, if Figure 1-2 As shown, the submerged ultrafiltration system also includes a sludge storage tank 2, which is connected to the bottom of the membrane tank 1 through a sludge collecting pump 21, and at least one of the sludge inlet and outlet ends of the sludge collecting pump 21 is provided with a third control valve 22, the sludge outlet of the sludge storage tank 2 is connected to a sewage pump 23, and a fourth control valve 25 is provided between the sludge outlet and the sewage pump 23, and a sludge collecting level gauge 12 is provided in the sludge storage tank 2, and the sludge filtered out by the submerged ultrafiltration module 4 in the membrane tank 1 is pumped into the sludge storage tank 2 through the sludge collecting pump 21, and the sludge storage tank 2 can settle the sludge to improve the water quality, and the sludge collecting pump 21 can be used to collect the sludge. The mud level meter 12 is used to measure the liquid level in the mud storage tank 2. When the liquid level of the sludge reaches the standard line, the sewage pump 23 and the fourth control valve 25 are turned on to discharge the sludge. After the sludge is discharged to the low liquid level of the mud collecting level meter 12, the sewage pump 23 is stopped and the fourth control valve 25 is closed. In case of mud discharge obstruction due to special circumstances, when the mud collecting level meter 12 reaches the alarm value, water production is stopped, and the mud collecting pump 21 is stopped at the same time. The third control valve 22 is closed and the operation is resumed after troubleshooting. The chemical cleaning tank 3 and the mud storage tank 2 share a sewage pump 23 for sewage discharge to save costs.

[0025] Alternatively, if Figure 2 As shown, the bottom of the membrane pool 1 is constructed as an inclined structure, and the mud inlet end of the mud collecting pump 21 is connected to the lower end of the inclined structure. The inclined bottom of the membrane pool 1 can make the sludge gather in one place and then be discharged by the mud collecting pump 21.

[0026] As an optional implementation, Figure 1 As shown, the water inlet of the membrane pool 1 is connected to the raw water source through the raw water pump 9, and a sixth control valve 10 is provided at at least one of the water inlet and the water outlet of the raw water pump 9, a water production pump 14 is provided at the water outlet of the membrane pool 1, a pressure transmitter 15 is provided at the water inlet of the water production pump 14, and a seventh control valve 16 is provided at the water outlet. A membrane pool level gauge 11 is provided in the membrane pool 1. Aeration is performed before water production. After the aeration is normal, the sixth control valve 10 is opened, the raw water pump 9 is started, and the raw water is pumped into the membrane pool 1. According to the data measured by the membrane pool level gauge 11, the raw water pump 9 is started. When the liquid level of the membrane pool 1 is too high, the raw water pump 9 stops automatically, and the membrane pool 1 stops replenishing water; when the water level of the membrane pool 1 drops to the set value, the raw water pump 9 starts and continues to replenish water; when the liquid level of the membrane pool 1 reaches the low alarm, the water production pump 14 stops running, and the auxiliary system stops accordingly. After the raw water enters the membrane pool 1, the seventh control valve 16 is opened, the water production pump 14 is started, and negative pressure is formed in the inner cavity of the membrane fibers of the submerged ultrafiltration module 4 to produce water. The static and operating pressure difference of the pressure transmitter 15 is used to determine whether the membrane needs to be cleaned offline.

[0027] As an optional implementation, Figure 1 As shown, the submerged ultrafiltration system also includes a backwash pump 19, the water inlet end of the backwash pump 19 is connected to the clean water tank 6, and the water outlet end is connected to the submerged ultrafiltration module 4, and a fifth control valve 20 is provided at at least one of the water inlet end and the water outlet end of the backwash pump 19. During operation, various impurities or large particles in the raw water will be filtered out by the membrane fibers of the submerged ultrafiltration module 4, so a debris layer will be formed outside the membrane fibers. Therefore, according to the quality of the raw water, the membrane fibers need to be backwashed with produced water, and the water from the clean water tank 6 is used for backwashing. According to the DCS preset logic, after the cumulative running time of the produced water pump 14 reaches the preset value, the produced water pump 14 is stopped, the seventh control valve 16 is closed, the fifth control valve 20 is opened, and the backwash pump 19 is started to backwash the submerged ultrafiltration module 4. The water after backwashing enters the membrane pool 1. After the backwashing is completed, the backwash pump 19 is stopped, the fifth control valve 20 is closed, and the water production logic is re-executed.

[0028] As an optional implementation, Figure 1As shown, the immersed ultrafiltration system also includes a disinfection water tank 7, which is arranged between the membrane pool 1 and the clean water tank 6. A disinfection water level gauge 18 is provided in the disinfection water tank 7. The initial produced water enters the disinfection water tank 7 for disinfection through a water production pump 14. A water tank communication door is provided between the disinfection water tank 7 and the clean water tank 6. After the disinfection water tank 7 is full, the water enters the clean water tank 6, and the clean water is transported to the water production equipment through the clean water delivery pump 35.

[0029] Optionally, the submerged ultrafiltration system further includes a first medicine box 28, which is connected to the disinfection water tank 7, and a first dosing pump 29 and an eighth control valve 30 are provided between the first medicine box 28 and the disinfection water tank 7. The dosing system of the disinfection water tank 7 also follows the operation of the water production pump 14. After the water production pump 14 is started, according to the system preset, the eighth control valve 30 is opened, and the first dosing pump 29 is started. The added medicine is a bactericide, and liquid sodium hypochlorite is conventionally used. The first dosing pump 29 is a metering pump. Finally, according to the residual chlorine and COD test results in the produced water quality, the dosing amount of the dosing system is adjusted. After the water production pump 14 stops, the first dosing pump 29 is stopped and the eighth control valve 30 is closed. The dosing system can also be connected to the membrane pool 1 to add medicine when the membrane pool 1 is maintained and cleaned.

[0030] As an optional implementation, Figure 1 As shown, the aeration device 8 is constructed as a Roots blower, which is connected to the submerged ultrafiltration module 4 and the spare ultrafiltration module 5 through a quick-connect plug, and a ninth control valve 34 is provided between the Roots blower and the submerged ultrafiltration module 4 and the spare ultrafiltration module 5. The Roots blower is a volumetric rotary blower, which is a rotary compressor that compresses and transports gas by using two or three blade-shaped rotors to make relative motion in a cylinder. This blower has a simple structure and is easy to manufacture. It is suitable for gas transportation and pressurization in low-pressure situations, and can also be used as a vacuum pump. The Roots blower is used for aeration, and aeration can be used to aerate and clean the submerged ultrafiltration module 4 and the spare ultrafiltration module 5. The module that needs aeration is controlled by the ninth control valve 34, and the Roots blower is connected to the submerged ultrafiltration module 4 and the spare ultrafiltration module 5 through a quick-connect plug, which is convenient for disassembly during chemical cleaning. Of course, aeration is not only used for cleaning, but also can inject oxygen to promote the growth and activity of aerobic microorganisms, accelerate the oxidation and decomposition of pollutants such as ammonia nitrogen in sewage, thereby achieving the purpose of purifying water quality; it can also be used for stirring and mixing.

[0031] like Figure 3As shown, the present disclosure also provides a control system for an immersed ultrafiltration system, comprising: the above-mentioned immersed ultrafiltration system; a detection component 200; a drive component 100; and a control module 300, which is used to receive the detection signal of the detection component 200 and control whether the drive component 100 is working. The control module 300 is a DCS control system or a single-chip microcomputer. The detection component 200 includes a membrane pool level gauge 11, a clean water level gauge 17, a disinfected water level gauge 18, a mud level gauge 12, a cleaning pool level gauge 13, and a pressure transmitter 15, which are used to detect the liquid level in each pool and the produced water pressure and transmit the signal to the control module 300. The control module 300 is used to receive the detection signal and control whether the drive component 100 is working according to the preset water level line and the produced water pressure. The drive component 100 includes the above-mentioned various control valves and pumps, so as to adjust the liquid level in each pool and whether backwashing and chemical cleaning are required, thereby realizing automatic control without manual operation.

[0032] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0033] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0034] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An immersion ultrafiltration system, characterized in that: include: A membrane tank having an immersed ultrafiltration module therein; A clean water tank, whose water inlet end is detachably connected to the water outlet of the submerged ultrafiltration module, and whose water outlet end is connected to the water production equipment; A chemical cleaning tank, in which a spare ultrafiltration module is provided, and the water inlet of the chemical cleaning tank is connected to the water outlet of the clean water tank; as well as An aeration device is detachably connected to the submerged ultrafiltration module and the spare ultrafiltration module.

2. The submerged ultrafiltration system according to claim 1, characterized in that: The water inlet of the chemical cleaning tank is connected to the clean water tank through a chemical cleaning pump, and a first control valve is provided at at least one of the water inlet and water outlet of the chemical cleaning pump, a sewage pump is provided at the water outlet of the chemical cleaning tank, and a second control valve is provided at at least one of the water inlet and water outlet of the sewage pump, a cleaning tank level meter is provided in the chemical cleaning tank, and a clean water level meter is provided in the clean water tank.

3. The submerged ultrafiltration system according to claim 2, characterized in that: The submerged ultrafiltration system also includes a mud storage tank, which is connected to the bottom of the membrane tank through a mud collecting pump. At least one of the mud inlet and mud outlet of the mud collecting pump is provided with a third control valve. The mud outlet of the mud storage tank is connected to the sewage pump and a fourth control valve is provided between the mud outlet and the sewage pump. A mud level meter is provided in the mud storage tank.

4. The submerged ultrafiltration system according to claim 3, characterized in that: The bottom of the membrane pool is constructed as an inclined structure, and the mud inlet end of the mud collecting pump is connected to the lower end of the inclined structure.

5. The submerged ultrafiltration system according to claim 1, characterized in that: The water inlet end of the membrane pool is connected to the raw water source through a raw water pump, and a sixth control valve is provided at at least one of the water inlet end and the water outlet end of the raw water pump, a water production pump is provided at the water outlet end of the membrane pool, a pressure transmitter is provided at the water inlet end of the water production pump, and a seventh control valve is provided at the water outlet end, and a membrane pool liquid level meter is provided in the membrane pool.

6. The submerged ultrafiltration system according to claim 1, characterized in that: The submerged ultrafiltration system also includes a backwash pump, the water inlet of the backwash pump is connected to the clean water tank, the water outlet is connected to the submerged ultrafiltration module, and a fifth control valve is provided at at least one of the water inlet and water outlet of the backwash pump.

7. The submerged ultrafiltration system according to claim 1, characterized in that: The submerged ultrafiltration system further comprises a disinfection water tank, which is arranged between the membrane pool and the clean water tank, and a disinfection water level gauge is arranged in the disinfection water tank.

8. The submerged ultrafiltration system according to claim 7, characterized in that: The submerged ultrafiltration system further includes a first medicine box, which is connected to the disinfection water tank, and a first dosing pump and an eighth control valve are provided between the first medicine box and the disinfection water tank.

9. The submerged ultrafiltration system according to claim 1, characterized in that: The aeration device is constructed as a Roots blower, which is connected to the submerged ultrafiltration module and the spare ultrafiltration module via a quick-connect plug, and a ninth control valve is provided between the Roots blower and the submerged ultrafiltration module and the spare ultrafiltration module.

10. A control system for an immersion ultrafiltration system, characterized in that: include: The submerged ultrafiltration system according to any one of claims 1 to 9; Detection components; Drive components; as well as The control module is used to receive the detection signal of the detection component and control whether the driving component works.

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