Novel membrane method multifunctional unit

Abstract

An embodiment of the utility model discloses a novel membrane method multifunctional unit which is characterized in that an ultrafiltration water inlet pump is connected with an ultrafiltration membrane through a pipeline I, the ultrafiltration water inlet pump is connected with a pipeline II, pipelines III are arranged at two ends of an energy recovery device, the pipelines III are connected with a pipeline IV, and pipelines V are arranged at two ends of a divalent salt concentration membrane, a salt separation membrane and a monovalent salt concentration membrane. A thick liquid discharging valve, a membrane system safety valve, a circulating pump, a high-pressure pump, a high-pressure pump outlet safety valve and a membrane front pressure gauge are arranged at the position of the ninth pipeline, and an exhaust valve and a high-pressure pump are arranged at the two ends of the ninth pipeline respectively; the two ends of the energy recovery device, the two ends of the divalent salt concentration membrane, the two ends of the salt separation membrane, the two ends of the monovalent salt concentration membrane, the two ends of the reverse osmosis membrane and the two ends of the organic membrane are all provided with isolating valves, the membrane system structure is integrated and optimized, and the defects that an existing zero-emission system is expensive in equipment, large in occupied area and the like are effectively overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a novel membrane method multifunctional unit. Background Art

[0002] As countries around the world pay more and more attention to environmental protection, environmental protection is also increasingly valued by my country. Air, water and soil are the three main sources of pollution for environmental protection and governance. Water is divided into municipal sewage and industrial wastewater, among which saline industrial wastewater is a difficult problem in the water treatment industry. The general process of saline industrial wastewater is: wastewater + pretreatment with dosing + precision filtration + ultrafiltration + reverse osmosis + nanofiltration + high concentration + MVR evaporation crystallization (freezing crystallization)

[0003] The zero-emission treatment system is mainly composed of the following process subsystems: pretreatment system, precision filtration, ultrafiltration, reverse osmosis, NF membrane separation system, high-concentration of monovalent salt, MVR system, high-concentration of divalent salt, refrigeration system, etc. Pretreatment mainly removes the color, suspended particles, ammonia nitrogen, COD, etc. of wastewater to ensure the subsequent membrane treatment system. Pretreatment includes: reaction tank, dosing device, ultrafiltration device, centrifuge, organic membrane, etc., adding high-efficiency flocculant in the flotation tank, and the COD removal rate is about 60% to 70%. At the same time, the pretreatment system adopts ultrafiltration membrane and organic membrane technology to ensure that the nanofiltration and reverse osmosis systems are not scaled or blocked, extend the service life of the system, and improve reliability. After pretreatment, it enters the reverse osmosis system, the reverse osmosis produced water is reused, and the concentrated water enters the nanofiltration salt separation unit.

[0004] The nanofiltration salt separation unit is composed of a high-pressure pump, a booster pump, a liquid replenishment pump, a backwash pump, an energy recovery device, a membrane assembly, supporting pipeline valves, a PLC electronic control system and related electrical components. After being processed by the salt separation unit, a Na2SO4 solution with a purity greater than 99% and a NaCl solution with a purity greater than 99.5% can be obtained.

[0005] After salt separation, it enters the high-concentration unit. The high-concentration unit consists of a high-pressure pump, a booster pump, a liquid replenishment pump, a backwash pump, an energy recovery device, a reverse osmosis membrane assembly, supporting pipeline valves, a PLC electronic control system and related electrical components. The device uses unique low-energy consumption advanced technology to intelligently adjust the concentration of concentrated water and purified water outlet, while achieving an energy utilization efficiency of 99%.

[0006] The salt solution treated by the monovalent salt high-concentration unit enters the heater for heating and evaporation, gas-liquid separation, and generates condensed water and concentrated crystal slurry. The condensed water and reverse osmosis purified water are collected and recycled, and the NaCl solid salt produced by the centrifuge is used for other industrial purposes.

[0007] The salt solution treated by the divalent salt high-concentration unit is frozen to allow the higher-purity sulfate solution to enter the centrifuge to obtain pure Na2SO4 solid salt for other industrial purposes, thus completely achieving zero emissions.

[0008] The existing processing system has the following disadvantages:

[0009] 1. There are many types of process sections in the zero emission system, and the process is relatively complicated;

[0010] 2. There are many kinds of equipment, covering a large area, and requiring large investment in civil engineering and equipment;

[0011] 3. The main process of the system is the membrane treatment system, including ultrafiltration, reverse osmosis, nanofiltration, organic membrane, high concentration of monovalent salt, and high concentration of divalent salt.

[0012] The above disadvantages limit the application areas of zero emission systems. Utility Model Content

[0013] The utility model provides a novel membrane multifunctional unit, which integrates and optimizes the membrane system structure, and organically combines common equipment such as common pumps and valves and different membranes into a whole, effectively solving the problems of the existing zero-emission system such as expensive equipment, large floor space, complex process and cumbersome maintenance.

[0014] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0015] The utility model discloses a novel membrane method multifunctional unit, comprising an ultrafiltration water inlet pump, the ultrafiltration water inlet pump is connected to the ultrafiltration membrane through a pipeline one, the water outlet of the ultrafiltration membrane is provided with an ultrafiltration concentrated water valve; the ultrafiltration water inlet pump is connected to the pipeline two, pipelines three are provided at both ends of an energy recovery device, one of the pipelines three is connected to the pipeline two, and the other pipeline three is connected to the pipeline four, both ends of a divalent salt concentration membrane, a salt separation membrane, and a monovalent salt concentration membrane are provided with pipelines five, and the pipeline five is connected to the pipeline four, and both ends of a reverse osmosis membrane and an organic membrane are provided with pipelines six, one of the pipelines six is ​​connected to the pipeline four, and the other pipeline three is connected to the pipeline four. Pipeline six is ​​connected to pipeline seven, another pipeline five is connected to pipeline eight, pipelines seven and eight are both connected to pipeline nine, pipeline nine is equipped with a concentration discharge valve, a membrane system safety valve, a circulation pump, a high-pressure pump, a high-pressure pump outlet safety valve and a pre-membrane pressure gauge, pipeline two is connected to pipeline nine, pipeline two is equipped with a post-membrane pressure gauge, exhaust valves and high-pressure pumps are respectively provided at both ends of pipeline nine, the exhaust valve is located at one end of pipeline seven, both ends of the energy recovery device, divalent salt concentration membrane, salt separation membrane, monovalent salt concentration membrane, reverse osmosis membrane and organic membrane are equipped with isolation valves, and pipelines two and nine are equipped with isolation valves.

[0016] Preferably, the isolation valve on pipeline 2 is located on one side of the ultrafiltration water inlet pump.

[0017] Preferably, an ultrafiltration pressure gauge is provided between the ultrafiltration membrane and the ultrafiltration concentrated water valve.

[0018] Preferably, the ultrafiltration water inlet pump, circulation pump and high-pressure pump are all installed on a base frame, and a mounting frame is provided at the rear end of the base frame, on which an energy recovery device, a divalent salt concentration membrane, a salt separation membrane, a monovalent salt concentration membrane, an ultrafiltration membrane, a reverse osmosis membrane and an organic membrane are installed.

[0019] Preferably, the mounting frame is provided with 3 groups of mounting horizontal plates, and 2 energy recovery devices are provided. The energy recovery device is arranged in parallel on the bottom mounting horizontal plate, the divalent salt concentration membrane, the salt separation membrane and the monovalent salt concentration membrane are arranged on the mounting horizontal plate located at the upper end of the energy recovery device, and the ultrafiltration membrane, the reverse osmosis membrane and the organic membrane are arranged on the top mounting horizontal plate.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model has low cost, highly integrated system, horizontal installation, and small footprint. The horizontal installation can integrate multiple membranes, and the pump group, valves and pipelines are highly integrated and modularized, which is further integrated and occupies a smaller area.

[0022] Simple maintenance and convenient operation. The utility model highly integrates the membrane system and the pump and valve system, and the integrated pump and valve assembly is more convenient to operate. The workload of disassembly and maintenance of the membrane system is almost zero.

[0023] Wide range of applications. A single unit can meet the treatment requirements of all membrane equipment in the zero-emission system and can be used for treatment requirements of different water qualities and working conditions.

[0024] Reasonable structure, safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of an embodiment of the utility model.

[0026] Figure 2 It is a flow chart of an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] As shown in the figure, the utility model discloses a novel membrane multifunctional unit, including an ultrafiltration water inlet pump 1, the ultrafiltration water inlet pump 1 is connected to the ultrafiltration membrane 16 through a pipeline 1 20, and the water outlet of the ultrafiltration membrane 16 is provided with an ultrafiltration concentrated water valve 13; the ultrafiltration water inlet pump 1 is connected to the pipeline 2 21, and pipelines 3 22 are provided at both ends of the energy recovery device 9, one of which is connected to the pipeline 2 21, and the other is connected to the pipeline 4 23, and pipelines 5 24 are provided at both ends of the divalent salt concentration membrane 10, the salt separation membrane 11, and the monovalent salt concentration membrane 12, and the pipelines 5 24 are connected to the pipeline 4 23, and pipelines 6 25 are provided at both ends of the reverse osmosis membrane 17 and the organic membrane 18, and one of which is connected to the pipeline 4 23, and the other is connected to the pipeline 6 25. It is connected to pipeline seven 26, another pipeline five 24 is connected to pipeline eight 27, pipeline seven 26 and pipeline eight 27 are both connected to pipeline nine 28, pipeline nine 28 is provided with a concentration discharge valve 3, a membrane system safety valve 4, a circulation pump 5, a high-pressure pump 6, a high-pressure pump outlet safety valve 7 and a pre-membrane pressure gauge 19, pipeline two 21 is connected to pipeline nine 28, pipeline two 21 is provided with a post-membrane pressure gauge 8, exhaust valves 15 and high-pressure pumps 6 are respectively provided at both ends of pipeline nine 28, the exhaust valve 15 is located at one end of pipeline seven 26, and both ends of the energy recovery device 9, the divalent salt concentration membrane 10, the salt separation membrane 11, the monovalent salt concentration membrane 12, the reverse osmosis membrane 17 and the organic membrane 18 are provided with isolation valves 14, and isolation valves 14 are provided on pipeline two 21 and pipeline nine 28.

[0029] In the utility model, the ultrafiltration water inlet pump 1 is also a fast water replenishment pump.

[0030] The isolation valve 14 can be divided into 14a, 14b, 14c, 14d, 14e, 14f, 14g, 14h, 14i, 14j, 14k, 14L, 14m, 14n, 14o, and 14p according to the position. As shown in the figure, the two sides of the reverse osmosis membrane 17 are installed with the isolation valve 14a and the isolation valve 14b, the two sides of the organic membrane 18 are installed with the isolation valve 14c and the isolation valve 14d, the two sides of the divalent salt concentration membrane 10 are installed with the isolation valve 14e and the isolation valve 14f, the two sides of the salt separation membrane 11 are installed with the isolation valve 14g and the isolation valve 14h, the two sides of the monovalent salt concentration membrane 12 are installed with the isolation valve 14i and the isolation valve 14j, one of the energy recovery devices 9 is installed with the isolation valve 14k and the isolation valve 14L, and the two sides of the other energy recovery device 9 are installed with the isolation valve 14m and the isolation valve 14n, and the one located between the pre-membrane pressure gauge 19 and the ultrafiltration concentrated water valve 13 is 14p. The one located on the side of the ultrafiltration feed pump 1 is 14o.

[0031] The utility model is divided into two parts according to the operating pressure. The low-pressure system is composed of an ultrafiltration water inlet pump, an ultrafiltration pressure gauge, an ultrafiltration concentrated water valve, and an ultrafiltration membrane, and uses a pressure level below 300PSI and UPVC pipes; the other is a high-pressure system, which uses a 1000PSI pressure level and is connected by corrosion-resistant duplex steel pipes. The high and low pressure systems are separated by a 14o isolating valve.

[0032] The operation of the utility model is divided into three working processes: liquid replenishment, work, and concentrated discharge. The system follows the process cycle of liquid replenishment-work-concentrated discharge-liquid replenishment. The specific operation process is as follows:

[0033] Fluid refill process:

[0034] Ultrafiltration refill: Start the ultrafiltration water inlet pump 1, open the ultrafiltration concentrated water valve 13, and close the isolation valve 14o. When water overflows from the ultrafiltration concentrated water valve, it proves that the ultrafiltration membrane 16 is filled with water and is ready to enter the workflow;

[0035] Reverse osmosis rehydration: start the ultrafiltration water inlet pump 1, close the ultrafiltration concentrated water valve 13, open the isolation valves 14o, 14k, 14L, 14m, 14n, 14a, 14b, and open the exhaust valve 15. When water overflows from the exhaust valve 15, it proves that the reverse osmosis membrane 17 is filled with water and is ready to enter the workflow;

[0036] Refill the organic membrane; start the ultrafiltration water inlet pump 1, close the ultrafiltration concentrated water valve 13, open the isolation valves 14o, 14k, 14L, 14m, 14n, 14c, 14d, open the exhaust valve 15, when the exhaust valve has water overflowing, it proves that the organic membrane 18 is filled with water and is ready to enter the workflow;

[0037] Refilling the divalent salt concentrating membrane: Start the ultrafiltration water inlet pump 1, close the ultrafiltration concentrated water valve 13, open the isolation valves 14o, 14k, 14L, 14m, 14n, 14e, 14f, and open the exhaust valve 15. When water overflows from the exhaust valve, it proves that the divalent salt concentrating membrane 10 is filled with water and is ready to enter the workflow;

[0038] Refilling the salt separation membrane: Start the ultrafiltration water inlet pump 1, close the ultrafiltration concentrated water valve 13, open the isolation valves 14o, 14k, 14L, 14m, 14n, 14g, 14h, and open the exhaust valve 15. When water overflows from the exhaust valve, it proves that the salt separation membrane 11 is filled with water and is ready to enter the workflow;

[0039] Refilling the monovalent salt concentrating membrane: Start the ultrafiltration water inlet pump 1, close the ultrafiltration concentrated water valve 13, open the isolation valves 14o, 14k, 14L, 14m, 14n, 14i, 14j, and open the exhaust valve 15. When water overflows from the exhaust valve, it proves that the monovalent salt concentrating membrane 12 is filled with water and is ready to enter the workflow;

[0040] Workflow:

[0041] Ultrafiltration work: After the ultrafiltration fluid replenishment is completed, keep the ultrafiltration water inlet pump 1 turned on, adjust the opening of the ultrafiltration concentrated water valve 13, so that the reading of the ultrafiltration pressure gauge 2 is around 3kg / cm^2, and the ultrafiltration system can produce water normally;

[0042] Reverse osmosis work: After reverse osmosis fluid replenishment is completed, close the exhaust valve 15, turn off the ultrafiltration water inlet pump 1, close the isolation valve 14o, open the isolation valves 14k, 14L, 14m, 14n, 14a, 14b, 14p, start the circulation pump 5 and the high-pressure pump 6, observe the pressure gauge 19 before the membrane and the pressure gauge 8 after the membrane, and wait until the pressure gauge value enters the stable rising stage, that is, enter the stable working stage;

[0043] Organic membrane operation: After the organic membrane is replenished, close the exhaust valve 15, close the ultrafiltration water inlet pump 1, close the isolation valve 14o, open the isolation valves 14k, 14L, 14m, 14n, 14c, 14d, 14p, start the circulation pump 5 and the high-pressure pump 6, observe the pressure gauge 19 before the membrane and the pressure gauge 8 after the membrane, and wait until the pressure gauge value enters the stable rising stage, that is, enter the stable working stage;

[0044] Working of divalent salt concentration membrane: After the divalent salt concentration membrane is replenished, close the exhaust valve 15, close the ultrafiltration water inlet pump 1, close the isolation valve 14o, open the isolation valves 14k, 14L, 14m, 14n, 14e, 14f, 14p, start the circulation pump 5 and the high-pressure pump 6, observe the pressure gauge 19 before the membrane and the pressure gauge 8 after the membrane, and wait until the pressure gauge value enters the stable rising stage, that is, enter the stable working stage;

[0045] Salt separation membrane operation: After the divalent salt concentration membrane is replenished, close the exhaust valve 15, close the ultrafiltration water inlet pump 1, close the isolation valve 14o, open the isolation valves 14k, 14L, 14m, 14n, 14g, 14h, 14p, start the circulation pump 5 and the high-pressure pump 6, observe the pressure gauge 19 before the membrane and the pressure gauge 8 after the membrane, and wait until the pressure gauge value enters the stable rising stage, that is, enter the stable working stage;

[0046] Working of monovalent salt concentration membrane: After the monovalent salt concentration membrane is replenished, close the exhaust valve 15, close the ultrafiltration water inlet pump 1, close the isolation valve 14o, open the isolation valves 14k, 14L, 14m, 14n, 14i, 14j, 14p, start the circulation pump 5 and the high-pressure pump 6, observe the pressure gauge 19 before the membrane and the pressure gauge 8 after the membrane, and wait until the pressure gauge value enters the stable rising stage, that is, enter the stable working stage;

[0047] Concentrate removal process:

[0048] Ultrafiltration concentrate discharge: When the ultrafiltration system is working, the produced water is produced in real time, and the concentrate is discharged in real time through the ultrafiltration concentrate valve 13;

[0049] After the reverse osmosis work is completed, close the high-pressure pump 6, close the isolation valve 14p, open the concentration discharge valve 3 and the exhaust valve 15, open the isolation valves 14k, 14L, 14m, 14n, 14a, 14b, open the circulation pump 5, and discharge the concentrate from the concentration discharge valve;

[0050] After the organic membrane is finished working, close the high-pressure pump 6, close the isolation valve 14p, open the exhaust valve 3 and the exhaust valve 15, open the isolation valves 14k, 14L, 14m, 14n, 14c, 14d, open the circulation pump 5, and discharge the concentrate from the exhaust valve;

[0051] Discharging the divalent salt concentration membrane: After the divalent salt concentration membrane is finished working, turn off the high-pressure pump 6, close the isolation valve 14p, open the concentration discharge valve 3 and the exhaust valve 15, open the isolation valves 14k, 14L, 14m, 14n, 14e, 14f, turn on the circulation pump 5, and discharge the concentrate from the concentration discharge valve;

[0052] Salt separation membrane concentration discharge: After the divalent salt concentration membrane is finished working, turn off the high-pressure pump 6, close the isolation valve 14p, open the concentration discharge valve 3 and the exhaust valve 15, open the isolation valves 14k, 14L, 14m, 14n, 14g, 14h, turn on the circulation pump 5, and discharge the concentrate from the concentration discharge valve;

[0053] Discharge of monovalent salt concentration membrane: After the divalent salt concentration membrane finishes working, close the high-pressure pump 6, close the isolation valve 14p, open the discharge valve 3 and the exhaust valve 15, open the isolation valves 14k, 14L, 14m, 14n, 14i, 14j, open the circulation pump 5, and discharge the concentrate from the discharge valve.

[0054] In an embodiment of the present utility model, the isolation valve 14 o on the pipeline 21 is located on one side of the ultrafiltration water inlet pump 1 .

[0055] In one embodiment of the utility model, an ultrafiltration pressure gauge 2 is provided between the ultrafiltration membrane 16 and the ultrafiltration concentrated water valve 13 .

[0056] In one embodiment of the utility model, the ultrafiltration water inlet pump 1, the circulation pump 5 and the high-pressure pump 6 are all installed on a base frame 29, and a mounting frame 30 is provided at the rear end of the base frame 29. The energy recovery device 9, the divalent salt concentration membrane 10, the salt separation membrane 11, the monovalent salt concentration membrane 12, the reverse osmosis membrane 17, the ultrafiltration membrane 16 and the organic membrane 18 are installed on the mounting frame 30.

[0057] In one embodiment of the utility model, the mounting frame 30 is provided with three groups of mounting horizontal plates 31, and the energy recovery device 9 is provided with two groups. The energy recovery device 9 is arranged in parallel on the bottom mounting horizontal plate 31, the divalent salt concentration membrane 10, the salt separation membrane 11, and the monovalent salt concentration membrane 12 are arranged on the mounting horizontal plate 31 located at the upper end of the energy recovery device 9, and the reverse osmosis membrane 17, the ultrafiltration membrane 16 and the organic membrane 18 are arranged on the top mounting horizontal plate.

[0058] The above contents are merely examples and explanations of the structure of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A new type of membrane multifunctional unit, characterized by: The device comprises an ultrafiltration water inlet pump, which is connected to the ultrafiltration membrane through a pipe 1, and an ultrafiltration concentrated water valve is arranged at the water outlet of the ultrafiltration membrane; the ultrafiltration water inlet pump is connected to the pipe 2, and pipes 3 are arranged at both ends of the energy recovery device, one of which is connected to the pipe 2, and the other is connected to the pipe 4, and pipes 5 are arranged at both ends of the divalent salt concentration membrane, the salt separation membrane, and the monovalent salt concentration membrane, and the pipes 5 are connected to the pipe 4, and pipes 6 are arranged at both ends of the reverse osmosis membrane and the organic membrane, one of which is connected to the pipe 4, and the other is connected to the pipe 7, and the other is connected to the pipe 8. A pipeline five is connected to pipeline eight, pipelines seven and eight are connected to pipeline nine, pipeline nine is provided with a concentration discharge valve, a membrane system safety valve, a circulation pump, a high-pressure pump, a high-pressure pump outlet safety valve and a pre-membrane pressure gauge, pipeline two is connected to pipeline nine, pipeline two is provided with a post-membrane pressure gauge, exhaust valves and high-pressure pumps are provided at both ends of pipeline nine respectively, and the exhaust valve is located at one end of pipeline seven, and both ends of the energy recovery device, divalent salt concentration membrane, salt separation membrane, monovalent salt concentration membrane, reverse osmosis membrane and organic membrane are provided with isolation valves, and pipelines two and nine are provided with isolation valves.

2. A novel membrane multifunctional unit according to claim 1, characterized in that: The isolation valve on pipeline 2 is located on one side of the ultrafiltration water inlet pump.

3. A novel membrane multifunctional unit according to claim 1, characterized in that: An ultrafiltration pressure gauge is provided between the ultrafiltration membrane and the ultrafiltration concentrated water valve.

4. A novel membrane multifunctional unit according to claim 1, characterized in that: The ultrafiltration water inlet pump, circulation pump and high-pressure pump are all installed on the base frame, and a mounting frame is provided at the rear end of the base frame. The energy recovery device, divalent salt concentration membrane, salt separation membrane, monovalent salt concentration membrane, ultrafiltration membrane, reverse osmosis membrane and organic membrane are installed on the mounting frame.

5. A novel membrane multifunctional unit according to claim 4, characterized in that: The mounting frame is provided with 3 sets of mounting horizontal plates, and 2 energy recovery devices are provided. The energy recovery device is arranged in parallel on the bottom mounting horizontal plate, the divalent salt concentration membrane, the salt separation membrane and the monovalent salt concentration membrane are arranged on the mounting horizontal plate located at the upper end of the energy recovery device, and the ultrafiltration membrane, the reverse osmosis membrane and the organic membrane are arranged on the top mounting horizontal plate.

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