Ultrafiltration-reverse osmosis water treatment device

Abstract

An ultrafiltration-reverse osmosis water treatment device comprises a self-cleaning filter, an ultrafiltration device, an ultrafiltration water producing tank, a primary reverse osmosis device and a desalted water tank, a water inlet of the self-cleaning filter is externally connected with a water inlet pipeline, a water outlet of the self-cleaning filter is communicated with a water inlet of the ultrafiltration device, a water producing port of the ultrafiltration device is communicated with a water inlet of the ultrafiltration water producing tank, and a water outlet of the primary reverse osmosis device is communicated with a water outlet of the desalted water tank. A water outlet of the ultrafiltration water production tank is communicated with a water inlet of the first-stage reverse osmosis device, and a water outlet of the first-stage reverse osmosis device is communicated with a water inlet of the desalted water tank; a backwashing pipeline is connected between the ultrafiltration water production tank and a backwashing port of the ultrafiltration device, a chemical backwashing pipeline is further communicated with the backwashing pipeline, and an ultrafiltration backwashing drain tank matched with the backwashing pipeline and a neutralization water tank matched with the chemical backwashing pipeline are further communicated with a drain outlet of the ultrafiltration device. The device can effectively realize efficient recovery of water resources and clean production, and is convenient to operate and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an ultrafiltration-reverse osmosis water treatment device. Background Art

[0002] With the acceleration of industrialization and the expansion of population, society's thirst for clean and safe water resources has become increasingly strong. Traditional water treatment technology is unable to meet the high standards of modern water quality. Although a variety of water treatment equipment has emerged on the market, it still encounters many technical bottlenecks in actual operation. The core problem is how to more effectively remove complex impurities such as suspended matter, colloids, microorganisms, soluble salts, heavy metals and organic matter in the water to ensure that the effluent water quality can stably meet or even exceed the strict standards of the country and the industry. In addition, the filter membrane is easily corroded by various impurities, microorganisms and chemical components in the water during operation, resulting in membrane flux attenuation and deterioration of effluent quality. This problem also needs to be solved urgently.

[0003] Therefore, exploring more efficient and durable impurity removal equipment to optimize the water treatment process has become a key issue that needs to be tackled urgently in the current field of water treatment technology. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an ultrafiltration-reverse osmosis water treatment device which can realize efficient recovery and clean production of water resources and is convenient to operate and maintain in view of the deficiencies of the prior art.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions. The utility model is an ultrafiltration-reverse osmosis water treatment device, comprising a self-cleaning filter, an ultrafiltration device, an ultrafiltration water production tank, a primary reverse osmosis device and a desalted water tank, the water inlet of the self-cleaning filter is externally connected to a water inlet pipe, the water outlet of the self-cleaning filter is connected to the water inlet of the ultrafiltration device, the water production port of the ultrafiltration device is connected to the water inlet of the ultrafiltration water production tank, the water outlet of the ultrafiltration water production tank is connected to the water inlet of the primary reverse osmosis device, and the water outlet of the primary reverse osmosis device is connected to the water inlet of the desalted water tank;

[0006] A backwash pipe is connected between the ultrafiltration water production tank and the backwash port of the ultrafiltration device, and a chemical backwash pipe is also connected to the backwash pipe. The sewage outlet of the ultrafiltration device is also connected to an ultrafiltration backwash drainage pool for cooperating with the backwash pipe and a neutralization water pool for cooperating with the chemical backwash pipe;

[0007] The sewage outlet of the primary reverse osmosis device is connected with a concentrated water reverse osmosis device, and the water outlet of the concentrated water reverse osmosis device is connected with a detection pipeline, which is respectively connected with the water inlet of the ultrafiltration water production tank and the water inlet of the desalted water tank.

[0008] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the ultrafiltration-reverse osmosis water treatment device described above, a chemical cleaning inlet and a chemical cleaning outlet for chemically cleaning the membrane assembly are also provided on the ultrafiltration device, and a chemical cleaning box is connected between the chemical cleaning inlet and the chemical cleaning outlet, and the chemical cleaning outlet is connected to a neutralization water tank, and the neutralization water tank is externally connected to a concentrated water discharge tank.

[0009] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the ultrafiltration-reverse osmosis water treatment device described above, a primary concentrated water tank is also connected between the sewage outlet of the primary reverse osmosis device and the concentrated water reverse osmosis device. The sewage outlet of the primary reverse osmosis device is connected to the primary concentrated water tank, and the primary concentrated water tank is connected to the water inlet of the concentrated water reverse osmosis device through a water pump.

[0010] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the ultrafiltration-reverse osmosis water treatment device described above, the sewage outlet of the concentrated water reverse osmosis device is connected to a secondary concentrated water tank.

[0011] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the ultrafiltration-reverse osmosis water treatment device described above, a reagent adding pipeline is also connected to the water inlet of the first-stage reverse osmosis device.

[0012] The technical problem to be solved by the utility model can be further achieved by the following technical scheme. For the ultrafiltration-reverse osmosis water treatment device described above, the water outlet of the desalted water tank is connected with an outlet pipe, and a water outlet pump is installed on the outlet pipe.

[0013] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the ultrafiltration-reverse osmosis water treatment device described above, an RO safety filter is also connected between the first-level reverse osmosis device and the ultrafiltration water production tank.

[0014] Compared with the prior art, the utility model separates or intercepts different substances during operation. The membrane separation process is a purely physical process without phase change or chemical reaction. Water resource recovery and clean production can be achieved without generating secondary pollutants. At the same time, the equipment of the utility model occupies a small area, has a high degree of automation, and is easy to operate and maintain. The efficient separation of the membrane ensures the efficient recovery of water resources. Secondly, the utility model can not only be used for the preparation of desalted water, industrial water and domestic water, but also for the treatment of sewage and wastewater, so as to achieve the recycling and reuse of water resources and reduce emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment 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.

[0017] Reference Figure 1 , an ultrafiltration-reverse osmosis water treatment device designed to remove impurities, suspended matter, organic matter, bacteria, viruses, and dissolved solids from raw water to produce high-quality desalinated water;

[0018] The device comprises a self-cleaning filter 2, an ultrafiltration device 3, an ultrafiltration water production tank 4, a primary reverse osmosis device 6 and a desalted water tank 7. The water inlet of the self-cleaning filter 2 is externally connected to a water inlet pipe 1, the water outlet of the self-cleaning filter 2 is communicated with the water inlet of the ultrafiltration device 3, the water production port of the ultrafiltration device 3 is communicated with the water inlet of the ultrafiltration water production tank 4, the water outlet of the ultrafiltration water production tank 4 is communicated with the water inlet of the primary reverse osmosis device 6, and the water outlet of the primary reverse osmosis device 6 is communicated with the water inlet of the desalted water tank 7; the self-cleaning filter 2 is used as the first line of defense of the entire device, and removes large particle impurities, suspended matter, etc. in the raw water by physical methods (such as filter interception), so as to protect the subsequent treatment units from blockage and wear. When the filter screen accumulates a certain amount of impurities, it can automatically backwash to discharge the impurities and realize continuous operation; the ultrafiltration device 3 is used to further remove tiny suspended matter, colloids, bacteria and some viruses in the water through the pore size screening effect of the ultrafiltration membrane; the ultrafiltration water production tank 4 is used to store the clean water produced by the ultrafiltration device 3 and serve as the inlet water of the first-level reverse osmosis device 6; the first-level reverse osmosis device 6 is used to perform reverse osmosis treatment on the clean water output by the ultrafiltration water production tank 4, effectively removing inorganic ions (such as salts, heavy metals, etc.), bacteria, viruses, organic matter, colloids and other impurities in the water, and further improving the water quality; the desalted water tank 7 is used to store the final product - desalted water to meet various water needs;

[0019] In order to further improve the water recovery rate, the sewage outlet of the primary reverse osmosis device 6 is connected with a concentrated water reverse osmosis device 19, and the water outlet of the concentrated water reverse osmosis device 19 is connected with a detection pipeline 17, and the detection pipeline 17 is respectively connected with the water inlet of the ultrafiltration water production tank 4 and the water inlet of the desalted water tank 7. The concentrated water reverse osmosis device 19 is used to reprocess the concentrated water of the primary reverse osmosis device 6, recover part of the water therein, and improve the overall water recovery rate. The detection pipeline 17 is led out from the concentrated water reverse osmosis device 19, and a detection port can be opened or a water quality detection can be installed to monitor the water quality and ensure that the quality of the recycled water meets the requirements;

[0020] In order to protect the primary reverse osmosis device 6, an RO safety filter 5 is connected between the primary reverse osmosis device 6 and the ultrafiltration water production tank 4, which is used as a pre-protection of the reverse osmosis (RO) system to further remove fine impurities in the water and protect the RO membrane from contamination;

[0021] A backwash pipe 8 is connected between the ultrafiltration water production tank 4 and the backwash port of the ultrafiltration device 3, and a chemical backwash pipe 9 is also connected to the backwash pipe 8. The sewage outlet of the ultrafiltration device 3 is also connected to an ultrafiltration backwash drainage pool 10 for cooperating with the backwash pipe 8 and a neutralization water pool 11 for cooperating with the chemical backwash pipe 9; the backwash pipe 8 is used to use the water in the ultrafiltration water production tank 4 for backwashing to remove pollutants on the membrane surface; the chemical backwash pipe 9 allows the addition of chemical agents when necessary to enhance the cleaning effect and remove pollutants that are difficult to remove by physical methods; the ultrafiltration backwash drainage pool 10 is used to contain the backwash wastewater of the ultrafiltration water production tank 4, so as to facilitate subsequent centralized treatment;

[0022] Secondly, a chemical cleaning inlet and a chemical cleaning outlet for chemically cleaning the membrane assembly are also provided on the ultrafiltration device 3. A chemical cleaning tank 12 is connected between the chemical cleaning inlet and the chemical cleaning outlet. The chemical cleaning outlet is connected to the neutralization water tank 11. The neutralization water tank 11 is externally connected to a concentrated water discharge tank 13. The chemical cleaning tank 12 is used to regularly chemically clean the membrane assembly to restore its filtering performance. The chemical cleaning tank 12 provides the required chemical agents. The wastewater after cleaning is treated through the neutralization water tank 11 to reduce the impact on the environment. The neutralization water tank 11 and the concentrated water discharge tank 13 are used to treat chemical cleaning wastewater to ensure that the discharged water quality meets environmental protection standards.

[0023] A primary concentrated water tank 15 is also connected between the sewage outlet of the primary reverse osmosis device 6 and the concentrated water reverse osmosis device 19. The sewage outlet of the primary reverse osmosis device 6 is connected to the primary concentrated water tank 15, and the primary concentrated water tank 15 is connected to the water inlet of the concentrated water reverse osmosis device 19 through a water pump; the sewage outlet of the concentrated water reverse osmosis device 19 is connected to a secondary concentrated water tank 16, so that the concentrated water discharged from the primary reverse osmosis device 6 first enters the primary concentrated water tank 15, and is sent to the concentrated water reverse osmosis device 19 for filtration through a water pump. The generated clean water can be reused in the desalted water tank 7, while the high-concentration wastewater is discharged into the secondary concentrated water tank 16.

[0024] The water inlet of the primary reverse osmosis device 6 is also connected to a reagent adding pipeline 14, through which antiscalants, bactericides, etc. can be added as needed to prevent scaling and biological contamination of the RO membrane.

[0025] The water outlet of the desalted water tank 7 is connected with a water outlet pipe 18, and a water outlet pump is installed on the water outlet pipe 18, so that the desalted water can be transported to a required place by cooperating with the water outlet pump and the water outlet pipe 18.

[0026] The utility model provides an ultrafiltration-reverse osmosis water treatment device, and its specific water treatment process is:

[0027] The water inlet pipe 1 first sends water to the self-cleaning filter 2 to intercept the residual particles and suspended matter (particle size greater than 100 microns and above) that may exist in the water. Then the water enters the ultrafiltration device 3 to remove suspended matter, colloids, microorganisms and macromolecular organic matter in the water. The effluent water quality can reach turbidity ≤ 0.5 NTU and SDI (silt density index: represents the content of particles, colloids and other objects in the water that can block various water purification equipment) ≤ 3;

[0028] The ultrafiltration adopts the operation mode of full flow filtration (dead end filtration), and the produced water enters the ultrafiltration water production tank 4; after the ultrafiltration device 3 runs for 30-60 minutes, the ultrafiltration produced water in the ultrafiltration water production tank 4 is used for online cleaning through the backwash pipe 8, and the backwash water is discharged into the ultrafiltration backwash drainage pool 10, and then reused in the first-stage horizontal flow sedimentation tank; according to the operation status of the ultrafiltration device 3, a CEB backwash (chemical enhanced backwashing) is performed after about 10 online cleanings, that is, chemical agents are input through the chemical backwash pipe 9, and the backwash water is discharged into the neutralization water pool 11 and then sent to the concentrated water discharge pool 13; secondly, the membrane components of the ultrafiltration device 3 are chemically cleaned once every 3 to 6 months, that is, chemical agents (such as acid solution or alkaline solution) are input through the chemical cleaning box 12 to remove the fouling on the membrane surface, and the chemical cleaning wastewater is pumped to the neutralization water pool 11;

[0029] After being lifted by the primary RO water pump, the ultrafiltration water enters the primary reverse osmosis device 6 through the primary RO water pump main pipe. At the same time, a certain amount of reducing agent (such as sodium bisulfite) is added through the reagent adding pipeline 14 to remove the residual chlorine in the water to ensure that the residual chlorine entering the reverse osmosis device is less than 0.1 mg / L. At the same time, an appropriate amount of antiscalant is added to prevent the reverse osmosis membrane from being blocked.

[0030] After the primary reverse osmosis of the primary reverse osmosis device 6, the recovery rate is about 75%, the produced water enters the desalted water tank 7, the concentrated water is discharged into the primary concentrated water tank 15, and then is pumped into the concentrated water reverse osmosis device 19 for treatment. After the secondary reverse osmosis of the concentrated water reverse osmosis device 19, the recovery rate is about 50%. If the produced water is qualified, it enters the desalted water tank 7. If it is unqualified, it enters the ultrafiltration water production tank 4 for further treatment, and the concentrated water is discharged into the secondary concentrated water tank 16. Finally, the desalted water is pumped and lifted through the outlet pipe 18 to the water-using enterprise.

Claims

1. An ultrafiltration-reverse osmosis water treatment device, characterized in that: It includes a self-cleaning filter, an ultrafiltration device, an ultrafiltration water production tank, a primary reverse osmosis device and a desalted water tank, the water inlet of the self-cleaning filter is externally connected to a water inlet pipe, the water outlet of the self-cleaning filter is connected to the water inlet of the ultrafiltration device, the water production port of the ultrafiltration device is connected to the water inlet of the ultrafiltration water production tank, the water outlet of the ultrafiltration water production tank is connected to the water inlet of the primary reverse osmosis device, and the water outlet of the primary reverse osmosis device is connected to the water inlet of the desalted water tank; A backwash pipe is connected between the ultrafiltration water production tank and the backwash port of the ultrafiltration device, and a chemical backwash pipe is also connected to the backwash pipe. The sewage outlet of the ultrafiltration device is also connected to an ultrafiltration backwash drainage pool for cooperating with the backwash pipe and a neutralization water pool for cooperating with the chemical backwash pipe; The sewage outlet of the primary reverse osmosis device is connected with a concentrated water reverse osmosis device, and the water outlet of the concentrated water reverse osmosis device is connected with a detection pipeline, which is respectively connected with the water inlet of the ultrafiltration water production tank and the water inlet of the desalted water tank.

2. The ultrafiltration-reverse osmosis water treatment device according to claim 1, characterized in that: The ultrafiltration device is also provided with a chemical cleaning inlet and a chemical cleaning outlet for chemically cleaning the membrane assembly. A chemical cleaning tank is connected between the chemical cleaning inlet and the chemical cleaning outlet. The chemical cleaning outlet is connected to a neutralization water pool, and the neutralization water pool is connected to a concentrated water discharge pool.

3. The ultrafiltration-reverse osmosis water treatment device according to claim 1, characterized in that: A primary concentrated water pool is also connected between the sewage outlet of the primary reverse osmosis device and the concentrated water reverse osmosis device. The sewage outlet of the primary reverse osmosis device is connected to the primary concentrated water pool, and the primary concentrated water pool is connected to the water inlet of the concentrated water reverse osmosis device through a water pump.

4. The ultrafiltration-reverse osmosis water treatment device according to claim 1 or 3, characterized in that: The sewage outlet of the concentrated water reverse osmosis device is connected to a secondary concentrated water tank.

5. The ultrafiltration-reverse osmosis water treatment device according to claim 1, characterized in that: The water inlet of the first-stage reverse osmosis device is also connected with a reagent adding pipeline.

6. The ultrafiltration-reverse osmosis water treatment device according to claim 1 or 5, characterized in that: The water outlet of the desalted water tank is connected with a water outlet pipeline, and a water outlet pump is installed on the water outlet pipeline.

7. The ultrafiltration-reverse osmosis water treatment device according to claim 1, characterized in that: An RO safety filter is also connected between the primary reverse osmosis device and the ultrafiltration water production tank.

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