Modularized efficient reclaimed water reuse treatment system

Abstract

The utility model discloses a modularized efficient reclaimed water reuse treatment system which comprises a pretreatment module, an advanced treatment module and a sludge treatment module. The pretreatment module adopts the design of double buffer pools, clean water wastewater and sewage wastewater are treated respectively, and all the buffer pools realize emergency mutual use through connecting pipelines and valves; the deep treatment module comprises a multi-medium filter, an ultrafiltration device and a reverse osmosis device, and steady-state control of the ultrafiltration device is realized through a flow meter and a valve; and the sludge treatment module adopts a plate-and-frame filter press to realize sludge dewatering. The system is provided with an intelligent control system, and stable operation of the system is ensured by monitoring inlet and outlet water flow of an ultrafiltration device in real time and dynamically adjusting the rotating speed of a clean water pump, valve opening and high-pressure pump operation parameters. The system has the advantages of high modularization degree, good operation stability, strong emergency capability and the like, can obviously improve the reuse efficiency of reclaimed water and reduce the operation energy consumption, and is suitable for various industrial wastewater treatment occasions.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a modular and efficient greywater reuse system. Background Technology

[0002] With rapid industrialization, water scarcity and environmental pollution have become increasingly severe problems, making greywater reuse technology an important means of solving industrial wastewater discharge and water resource recycling. Traditional greywater reuse systems generally suffer from problems such as poor process integration, low treatment efficiency, and high energy consumption. Existing greywater reuse systems mainly have the following structural defects: 1. Insufficient adaptability to different types of wastewater; 2. Unreasonable layout of process units: the pretreatment unit and the advanced treatment unit are fixedly connected, making it impossible to flexibly adjust the process flow according to changes in water quality, resulting in unstable treatment effects; 3. Low equipment integration: the dosing system, stirring device, filtration equipment, etc., are scattered, occupying a large area and with complex piping, increasing system resistance and energy consumption; 4. Poor operational stability of ultrafiltration devices, prone to flow fluctuations; 5. Low level of automation control, making it difficult to achieve precise flow balance control. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a modular and efficient greywater reuse treatment system, which improves treatment efficiency and operational stability by optimizing system structure and control methods.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A modular and efficient greywater reuse treatment system, comprising a pretreatment module, an advanced treatment module, and a sludge treatment module;

[0006] The pretreatment module includes a buffer tank, a booster pump, a rapid mixing tank, a coagulation tank, and an inclined plate sedimentation tank connected in sequence. Sodium hypochlorite, alkali, and flocculant are added at the inlet of the rapid mixing tank by a chemical supply device. The pretreated water enters the clear water tank at the outlet of the inclined plate sedimentation tank.

[0007] The advanced treatment module includes a multi-media filter, an ultrafiltration unit, and a reverse osmosis unit. The output of the multi-media filter supplies the input to the ultrafiltration unit. The water treated by the ultrafiltration unit flows to the ultrafiltration tank, and the outlet of the ultrafiltration tank flows to the reverse osmosis unit. The ultrafiltration tank also backwashes the water in the tank through a UF backwash pump before it flows to the ultrafiltration unit. Sodium hypochlorite, alkali, and hydrochloric acid are added by a chemical supply device at the supply end of the UF backwash pump to the ultrafiltration unit.

[0008] The sludge treatment module includes a plate and frame filter press, which supplies the filtered water from the sludge-containing wastewater to the buffer tank.

[0009] The aforementioned buffer tanks are provided in two locations, one for buffering clean water wastewater and the other for buffering sewage wastewater. Each buffer tank is equipped with multiple sets of booster pumps at its outlet, which supply the input to different rapid mixing tanks.

[0010] The outlets of the two buffer pools mentioned above are connected by pipes, and valves are installed on the connecting pipes.

[0011] The water from the outlet of the aforementioned clear water tank enters the multi-media filter via a clear water pump.

[0012] The water at the outlet of the aforementioned clean water pump is backwashed by the MMF backwash pump to the multi-media filter, and the backwashed water flows back into the buffer tank.

[0013] The water at the outlet of the ultrafiltration tank enters the reverse osmosis unit via a security filter and a high-pressure pump. The treated water at the outlet of the reverse osmosis unit flows to the reclaimed water tank.

[0014] The ultrafiltration device is equipped with an input flow meter at the input end and an output flow meter at the output end. An opening valve is installed on the input pipe of the ultrafiltration device.

[0015] The aforementioned wastewater reuse system is controlled by a controller that communicates with an analog module. The input of the analog module is electrically connected to the input flow meter and output flow meter of the ultrafiltration unit. The output of the analog module is electrically connected to the frequency converter of the clean water pump, the valve of the ultrafiltration unit, and the frequency converter of the high-pressure pump.

[0016] The centrifugal compressor heat transfer and reuse device provided by this utility model has the following beneficial effects:

[0017] 1. The system adopts a dual buffer tank design to treat clean water wastewater and sewage wastewater separately, thereby improving the system's adaptability;

[0018] 2. Install connecting pipes and valves between buffer pools to enable emergency handling in case of equipment failure;

[0019] 3. Steady-state operation of the ultrafiltration unit is achieved through flow meter and valve control;

[0020] 4. An intelligent control system is adopted to adjust the operating parameters of each unit in real time. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a process flow diagram of the modular high-efficiency greywater reuse treatment system of this utility model;

[0023] Figure 2This is a schematic diagram of the preprocessing module.

[0024] Figure 3 This is a schematic diagram showing the connection of the ultrafiltration device;

[0025] Figure 4 This is a schematic diagram of the electrical control circuit for the flow control of an ultrafiltration device.

[0026] In the diagram: 1. Buffer tank; 2. Lift pump; 3. Rapid mixing tank; 4. Coagulation tank; 5. Inclined plate sedimentation tank; 6. Clear water tank; 7. Clear water pump; 8. MMF backwash pump; 9. Multi-media filter; 10. Ultrafiltration device; 11. Ultrafiltration water tank; 12. UF backwash water pump; 13. Security filter; 14. High-pressure pump; 15. Recycled water tank; 16. Concentrate collection tank; 17. Plate and frame filter press; 18. Ultrafiltration device input flow meter; 19. Ultrafiltration device output flow meter; 20. Ultrafiltration device opening valve; 21. Controller; 22. Clear water pump frequency converter; 23. Ultrafiltration device opening valve driver; 24. High-pressure pump frequency converter; 25. Analog module; 26. Human-machine interface module; 27. Detailed Implementation

[0027] Example 1:

[0028] like Figure 1-4 As shown, a modular and efficient greywater reuse treatment system includes a pretreatment module, an advanced treatment module, and a sludge treatment module.

[0029] The pretreatment module includes a buffer tank 1, a booster pump 2, a rapid mixing tank 3, a coagulation tank 4, and an inclined plate sedimentation tank 5 connected in sequence. Sodium hypochlorite, alkali, and flocculant are added at the inlet of the rapid mixing tank 3 by a chemical supply device. The pretreated water enters the clear water tank 6 at the outlet of the inclined plate sedimentation tank 5.

[0030] The advanced treatment module includes a multi-media filter 9, an ultrafiltration unit 10, and a reverse osmosis unit 15. The output of the multi-media filter 9 supplies the input of the ultrafiltration unit 10. The water treated by the ultrafiltration unit 10 flows to the ultrafiltration water tank 11, and the outlet of the ultrafiltration water tank 11 flows to the reverse osmosis unit 15. The ultrafiltration water tank 11 also backwashes the water in the tank through a UF backwash water pump 12 before it flows to the ultrafiltration unit 10. Sodium hypochlorite, alkali, and hydrochloric acid are added by a chemical supply device at the supply end of the UF backwash water pump 12 to the ultrafiltration unit 10.

[0031] The sludge treatment module includes a plate and frame filter press 18, which supplies the filtered water from the sludge-containing wastewater to the buffer tank 1.

[0032] The aforementioned buffer tank 1 is provided in two parts, which are used to buffer clean water wastewater and sewage wastewater respectively; each buffer tank 1 is equipped with multiple sets of lift pumps 2 at its outlet end, and the outlet end of the lift pumps 2 supplies input to different rapid mixing tanks 3.

[0033] The outlets of the two buffer pools mentioned above are connected by pipes, and valves are installed on the connected pipes.

[0034] Two buffer tanks 1 are equipped with connecting pipes and valves at their outlets, allowing the water from both tanks to share one set of booster pump 2. This prevents the wastewater from the two tanks from being pumped to the undamaged booster tank 3 for treatment in case one of the booster pumps, or one or more of the rapid mixing tank 3, coagulation tank 4, or inclined plate sedimentation tank 5, fails.

[0035] The water from the outlet of the aforementioned clear water tank 6 enters the multi-media filter 9 via the clear water pump 7.

[0036] The water at the outlet of the aforementioned clean water pump 7 is backwashed by the MMF backwash pump 8 to the multi-media filter 9, and the water after backwashing by the multi-media filter 9 flows back into the buffer tank 1.

[0037] The water at the outlet of the ultrafiltration water tank 11 enters the reverse osmosis unit 15 via the security filter 13 and the high-pressure pump 14. The treated water at the outlet of the reverse osmosis unit 15 flows to the reclaimed water tank 16.

[0038] The ultrafiltration device 10 is equipped with an ultrafiltration device input flow meter 19 at its input end, an ultrafiltration device output flow meter 20 at its output end, and an ultrafiltration device opening valve 21 on the pipeline at the input end of the ultrafiltration device 10.

[0039] The above-mentioned wastewater reuse treatment system is controlled by controller 22. Controller 22 is connected to analog module 26. The input terminal of analog module 26 is electrically connected to the input flow meter 19 and the output flow meter 20 of ultrafiltration device. The output terminal of analog module 26 is electrically connected to the frequency converter 23 of clean water pump, the opening valve drive 24 of ultrafiltration device, and the frequency converter 25 of high pressure pump.

[0040] Maintaining stable flow at the ultrafiltration unit is crucial for system stability. Excessive differences between inflow and outflow can lead to buildup or cavities in the ultrafiltration unit. Buildup increases internal pressure, while cavities reduce purification efficiency. It's essential to keep the difference within a certain range. By monitoring the inflow and outflow of the ultrafiltration unit, combined with the current input (the clean water pump's operation) and the subsequent reverse osmosis process, controller 22 controls the clean water pump's speed and the ultrafiltration unit's input flow. This, along with controlling the opening of the input valves for each ultrafiltration unit and managing the water flow into the reverse osmosis unit 15, ensures that the ultrafiltration unit 10 operates at a steady flow rate.

Claims

1. A modular, high-efficiency greywater reuse treatment system, characterized in that, The wastewater reuse system includes a pretreatment module, an advanced treatment module, and a sludge treatment module. The pretreatment module includes a buffer tank (1), a booster pump (2), a rapid mixing tank (3), a coagulation tank (4), and an inclined plate sedimentation tank (5) connected in sequence. Sodium hypochlorite, alkali, and flocculant are added at the inlet of the rapid mixing tank (3) by a chemical supply device. The pretreated water enters the clear water tank (6) at the outlet of the inclined plate sedimentation tank (5). The deep treatment module includes a multi-media filter (9), an ultrafiltration device (10), and a reverse osmosis device (15); the output end of the multi-media filter (9) supplies the input of the ultrafiltration device (10), the water treated by the ultrafiltration device (10) flows to the ultrafiltration water tank (11), and the outlet end of the ultrafiltration water tank (11) flows to the reverse osmosis device (15); the ultrafiltration water tank (11) also backwashes the water in the tank through the UF backwash water pump (12) and then flows to the ultrafiltration device (10), and sodium hypochlorite, alkali and hydrochloric acid are added by the chemical supply device at the end of the UF backwash water pump (12) supplying the ultrafiltration device (10); The sludge treatment module includes a plate and frame filter press (18), which supplies the filtered water after filtration of sludge-containing wastewater to the buffer tank (1).

2. The modular high-efficiency greywater reuse treatment system according to claim 1, characterized in that, The buffer tank (1) is provided in two, which are used to buffer clean water wastewater and sewage wastewater respectively; each buffer tank (1) is provided with multiple sets of lift pumps (2) at the outlet end, and the outlet end of the lift pumps (2) supplies input to different rapid mixing tanks (3).

3. The modular high-efficiency greywater reuse treatment system according to claim 2, characterized in that, The outlet ends of the two buffer pools (1) are provided with connecting pipes, and there are valves on the connecting pipes.

4. The modular high-efficiency greywater reuse treatment system according to claim 3, characterized in that, The water at the outlet of the clear water tank (6) enters the multi-media filter (9) via the clear water pump (7).

5. The modular high-efficiency greywater reuse treatment system according to claim 4, characterized in that, The water at the outlet of the clean water pump (7) is backwashed by the MMF backwash pump (8) to the multi-media filter (9), and the water after backwashing of the multi-media filter (9) flows back into the buffer tank (1).

6. The modular high-efficiency greywater reuse treatment system according to claim 5, characterized in that, The water at the outlet of the ultrafiltration tank (11) enters the reverse osmosis device (15) via the security filter (13) and the high-pressure pump (14), and the treated water at the outlet of the reverse osmosis device (15) flows to the reclaimed water tank (16).

7. A modular, high-efficiency greywater reuse treatment system according to claim 6, characterized in that, The ultrafiltration device (10) is equipped with an ultrafiltration device input flow meter (19) at the input end, an ultrafiltration device output flow meter (20) at the output end, and an ultrafiltration device opening valve (21) on the pipeline at the input end of the ultrafiltration device (10).

8. A modular, high-efficiency greywater reuse treatment system according to claim 7, characterized in that, The aforementioned wastewater reuse treatment system is controlled by a controller (22) to control the process. The controller (22) is connected to an analog module (26) for communication. The input end of the analog module (26) is electrically connected to the input flow meter (19) and the output flow meter (20) of the ultrafiltration device. The output end of the analog module (26) is electrically connected to the frequency converter drive (23) of the clean water pump, the opening valve drive (24) of the ultrafiltration device, and the frequency converter drive (25) of the high-pressure pump.

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