Industrial production ultrapure water preparation system

Abstract

The utility model discloses an industrial production ultrapure water preparation system, and relates to the technical field of deep water treatment. The ozone generator is used for preparing ozone and supplying the ozone into the vertical reaction tank, an activated carbon layer is arranged in the vertical reaction tank, raw water is discharged through the vertical reaction tank and is fed into the clean water tank, water is supplied to the ultrafiltration device through the pumping pipeline, and produced water of the ultrafiltration device passes through the ultraviolet sterilization device and then flows into the ultrafiltration water tank; ultraviolet lamp tubes with two frequency bands are arranged at the two ends of the inner side of a cylindrical shell of the ultraviolet sterilization device, a baffling pipeline which is distributed in an S-shaped circuitous mode in the axial direction is evenly wound around the outer side of the cylindrical shell, and two ports of the baffling pipeline extend out of the cylindrical shell to be connected with an ultrafiltration device and an ultrafiltration water tank respectively; and the ultrafiltration water tank supplies water to the reverse osmosis device, and then the water passes through the EDI device and the filter membrane, so that the produced water forms ultrapure water. The ozone-activated carbon reaction device is used for controlling the problem that TOC of effluent exceeds the standard, meanwhile, the ultraviolet sterilization device is arranged in front of the ultrafiltration water tank, biological pollution of the reverse osmosis device is avoided through cooperation, and the quality of prepared ultrapure water is improved.

Description

Technical Field

[0001] This utility model relates to the field of advanced water treatment technology, specifically an industrial ultrapure water preparation system. Background Technology

[0002] Ultrapure water, also known as high-purity water, is a highly purified water that has undergone extensive treatment to remove almost all conductive media, non-dissociated colloidal substances, gases, organic matter, and microorganisms such as bacteria and viruses. It has extremely high resistivity, typically reaching 18 MΩ·cm (25℃), extremely low salt content, usually below 0.1 mg / L, and conductivity less than 0.1 μS / cm. The preparation process of ultrapure water usually involves multiple technologies such as reverse osmosis, deionization, distillation, and ultrafiltration to ensure extremely high water purity. It is widely used in many fields, including electronics and semiconductors, biomedicine, laboratories, food, and cosmetics.

[0003] However, current industrial production of ultrapure water relies solely on reverse osmosis devices to remove total organic carbon (TOC), resulting in TOC exceeding the standard in the effluent. This is insufficient to meet the demand. Furthermore, the pre-filter ultrafiltration device can only intercept some bacteria, and microorganisms can grow in the ultrafiltration tank over long periods of operation, requiring regular maintenance, which increases operating costs. Moreover, it can easily cause biofouling of the reverse osmosis membrane, reducing its service life. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides an industrial ultrapure water preparation system that controls the TOC exceeding the standard in the effluent through an ozone-activated carbon reaction device, and simultaneously installs an ultraviolet sterilization device before the ultrafiltration water tank. Together, these measures prevent biological contamination of the reverse osmosis device and improve the quality of the prepared ultrapure water.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an industrial ultrapure water preparation system, comprising an ozone-activated carbon reaction device, a clear water tank, an ultrafiltration device, an ultraviolet sterilization device, an ultrafiltration water tank, a reverse osmosis device, an EDI device, and a filter membrane. The ozone-activated carbon reaction device includes an ozone generator and a vertical reaction tank. The ozone generator is connected to an oxygen cylinder to generate ozone, which is supplied through the bottom of the outer wall of the vertical reaction tank and discharged from the top. An activated carbon layer is installed inside the vertical reaction tank. Raw water is fed into the clear water tank through the top and discharged from the bottom to the clear water tank. The clear water tank supplies water to the ultrafiltration device through a pump pipeline. The permeate from the device flows into the ultrafiltration water tank after passing through an ultraviolet sterilization unit. The ultraviolet sterilization unit includes a cylindrical outer shell and a baffled pipe. Two quartz lamp covers are integrally installed axially at both ends of the inner side of the cylindrical outer shell. Ultraviolet lamps with frequencies of 185nm and 254nm are installed inside the two quartz lamp covers, respectively. The baffled pipe is arranged in a serpentine pattern axially and evenly surrounds the outer sides of the two quartz lamp covers. Both ends of the baffled pipe extend out of the cylindrical outer shell and connect to the ultrafiltration unit and the ultrafiltration water tank, respectively. The ultrafiltration water tank supplies water to the reverse osmosis unit via a pump line. The permeate from the reverse osmosis unit passes sequentially through the EDI unit and the filter membrane to form ultrapure water.

[0006] Furthermore, the ozone generator uses an ejector for mixed ozone addition, with an ozone dosage of 1–10 mg / L.

[0007] Furthermore, the top of the vertical reaction tank is connected to an ozone exhaust gas treatment system via a pipeline.

[0008] Furthermore, the activated carbon layer inside the vertical reaction vessel is made of coconut shell granular activated carbon with a particle size of 0.1 to 0.2 mm.

[0009] Furthermore, the ultrafiltration device employs a graphene blended ultrafiltration membrane module, wherein the amount of graphene material added is 0.1% to 1%.

[0010] Furthermore, the inner wall of the cylindrical outer shell of the ultraviolet sterilization device is provided with an ultraviolet reflective film.

[0011] Furthermore, the ultraviolet lamp tube of the ultraviolet sterilization device is an amalgam sterilization lamp or an ultraviolet LED lamp.

[0012] Furthermore, the reverse osmosis device adopts a two-stage reverse osmosis configuration. The permeate from the first-stage reverse osmosis section enters the second-stage reverse osmosis section for secondary desalination, and the concentrate from the second-stage reverse osmosis section is returned to the ultrafiltration water tank.

[0013] Furthermore, the inlet pipeline of the reverse osmosis device is sequentially equipped with a first dosing point, a second dosing point, and a mixer. The first dosing point is connected to a reducing agent dosing tank, and the second dosing point is connected to a scale inhibitor dosing tank.

[0014] Furthermore, the filter membrane is a PTFE hydrophobic filter membrane with a pore size of 0.2μm or 0.5μm.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses an ozone-activated carbon reaction device to control the problem of excessive TOC in the effluent by utilizing the strong oxidizing properties of ozone and the adsorption properties of activated carbon. Moreover, activated carbon also has a certain bactericidal effect, reducing the bacterial load on the ultrafiltration device. At the same time, an ultraviolet sterilization device is set in front of the ultrafiltration water tank. Under the action of ozone sterilization, ultrafiltration device interception of bacteria and ultraviolet sterilization, the biological pollution of the reverse osmosis device by microorganisms is avoided, effectively improving the quality of the prepared ultrapure water. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the industrial ultrapure water preparation system of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the ultraviolet sterilization device in this utility model.

[0018] In the diagram: 1. Ozone-activated carbon reaction device; 2. Clear water tank; 3. Ultrafiltration device; 4. Ultraviolet sterilization device; 5. Ultrafiltration water tank; 6. Reverse osmosis device; 7. EDI device; 8. Filter membrane; 1-1. Ozone generator; 1-2. Ozone exhaust gas treatment system; 4-1. Cylindrical outer shell; 4-2. Quartz lamp cover; 4-3. Baffle pipe. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0020] like Figures 1-2 As shown, an industrial ultrapure water preparation system includes an ozone-activated carbon reactor 1, a clear water tank 2, an ultrafiltration device 3, an ultraviolet sterilization device 4, an ultrafiltration water tank 5, a reverse osmosis device 6, an EDI device 7, and a filter membrane 8.

[0021] Combination Figure 1As shown, the ozone-activated carbon reaction device 1 includes an ozone generator 1-1 and a vertical reaction tank. The ozone generator 1-1 connects to an oxygen cylinder to generate ozone, which is then supplied through the bottom of the outer wall of the vertical reaction tank and discharged from the top. The ozone generator 1-1 uses an ejector for mixing and adding ozone, with a dosage of 1-10 mg / L. An activated carbon layer is installed inside the vertical reaction tank, preferably using coconut shell granular activated carbon with a particle size of 0.1-0.2 mm. To avoid pollution from ozone exhaust gas, an ozone exhaust gas treatment system 1-2 can be connected to the top of the vertical reaction tank via a pipeline for exhaust gas treatment. The ozone exhaust gas treatment system 1-2 can use a 2% sodium sulfite absorber or a catalyst-based ozone exhaust gas destroyer. Raw water is fed into the vertical reaction tank from the top and discharged from the bottom into a clear water tank 2. The raw water can be pre-treated water that has undergone coagulation, sedimentation, and multi-media filtration, or it can be distilled or deionized water, but this would increase raw material costs. The clear water tank 2 supplies water to the ultrafiltration device 3 through a pumping pipeline. The ultrafiltration device 3 uses a graphene blended ultrafiltration membrane module, wherein the amount of graphene material added is 0.1% to 1%. The water produced by the ultrafiltration device 3 flows into the ultrafiltration water tank 5 after passing through the ultraviolet sterilization device 4.

[0022] Combination Figure 2 As shown, the ultraviolet sterilization device 4 includes a cylindrical outer shell 4-1 and a baffled pipe 4-3. Two quartz lamp covers 4-2 are integrally installed along the axial direction at both ends of the inner side of the cylindrical outer shell 4-1. Ultraviolet lamps with frequencies of 185nm and 254nm are respectively installed inside the two quartz lamp covers 4-2. These can be amalgam germicidal lamps or ultraviolet LED lamps. These two frequencies of ultraviolet light can effectively destroy the molecular structure of most microorganisms, achieving a highly efficient sterilization effect. Furthermore, an ultraviolet reflective film can be installed on the inner wall of the cylindrical outer shell 4-1 to further increase the reflection frequency of the ultraviolet light and enhance its sterilization effect. The baffle pipes 4-3 are arranged in a serpentine pattern along the axial direction and are evenly wrapped around the outside of the two quartz lamp covers 4-2. The two ends of the baffle pipes 4-3 extend out of the cylindrical shell 4-1 and are connected to the ultrafiltration device 3 and the ultrafiltration water tank 5 respectively. This is used to introduce the water produced by the ultrafiltration device 3 into the ultraviolet sterilization device 4 for sterilization before introducing it into the ultrafiltration water tank 5, so as to avoid the growth of microorganisms and bacteria, reduce the risk of reverse osmosis membrane being biocontaminated, and extend its service life.

[0023] Combination Figure 1As shown, the ultrafiltration water tank 5 supplies water to the reverse osmosis unit 6 via a pump pipeline. The reverse osmosis unit 6 preferably adopts a two-stage reverse osmosis configuration. The permeate from the first-stage reverse osmosis section enters the second-stage reverse osmosis section for secondary desalination. The concentrate from the second-stage reverse osmosis section is returned to the ultrafiltration water tank 5. A first dosing point, a second dosing point, and a mixer can be sequentially installed on the inlet pipeline of the reverse osmosis unit 6. The first dosing point is connected to a reducing agent dosing tank, and the second dosing point is connected to a scale inhibitor dosing tank to further ensure the treatment effect of reverse osmosis. The permeate from the reverse osmosis unit 6 is produced after passing through the EDI unit 7 and the filter membrane 8. The EDI unit 7 performs deep purification and desalination on the permeate from the reverse osmosis unit 6, while the filter membrane 8 preferably uses a PTFE hydrophobic filter membrane with a pore size of 0.2μm or 0.5μm to achieve fine filtration before the water is discharged, ultimately forming ultrapure water.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An industrial ultrapure water preparation system, characterized in that: The system includes an ozone-activated carbon reactor (1), a clear water tank (2), an ultrafiltration device (3), an ultraviolet sterilization device (4), an ultrafiltration water tank (5), a reverse osmosis device (6), an EDI device (7), and a filter membrane (8). The ozone-activated carbon reactor (1) includes an ozone generator (1-1) and a vertical reaction tank. The ozone generator (1-1) is connected to an oxygen cylinder to generate ozone, which is then supplied through the bottom of the outer wall of the vertical reaction tank and discharged from the top. An activated carbon layer is installed inside the vertical reaction tank. Raw water is fed into the clear water tank (2) through the top of the vertical reaction tank and discharged from the bottom. The clear water tank (2) supplies water to the ultrafiltration device (3) through a pump pipeline. The product water of the ultrafiltration device (3) flows into the ultrafiltration water tank (5) after passing through the ultraviolet sterilization device (4). The microbial device (4) includes a cylindrical shell (4-1) and a baffled pipe (4-3). Two quartz lamp covers (4-2) are integrally installed on the inner two ends of the cylindrical shell (4-1) along the axial direction. Ultraviolet lamps of two frequency bands, 185nm and 254nm, are installed in the two quartz lamp covers (4-2) respectively. The baffled pipe (4-3) is arranged in a serpentine manner along the axial direction and is evenly wrapped around the outside of the two quartz lamp covers (4-2). The two ends of the baffled pipe (4-3) extend out of the cylindrical shell (4-1) and are connected to the ultrafiltration device (3) and the ultrafiltration water tank (5) respectively. The ultrafiltration water tank (5) supplies water to the reverse osmosis device (6) through a pump pipeline. The product water of the reverse osmosis device (6) passes through the EDI device (7) and the filter membrane (8) in sequence to form ultrapure water.

2. The industrial ultrapure water preparation system according to claim 1, characterized in that: The ozone generator (1-1) uses an ejector for mixed ozone addition, with an ozone addition rate of 1-10 mg / L.

3. An industrial ultrapure water preparation system according to claim 1 or 2, characterized in that: The top of the vertical reaction tank is connected to the ozone exhaust gas treatment system (1-2) via pipeline.

4. The industrial ultrapure water preparation system according to claim 3, characterized in that: The activated carbon layer inside the vertical reactor is made of coconut shell granular activated carbon with a particle size of 0.1 to 0.2 mm.

5. The industrial ultrapure water preparation system according to claim 1, characterized in that: The ultrafiltration device (3) uses a graphene blended ultrafiltration membrane module inside, wherein the amount of graphene material added is 0.1% to 1%.

6. The industrial ultrapure water preparation system according to claim 1, characterized in that: The inner wall of the cylindrical outer shell (4-1) of the ultraviolet sterilization device (4) is provided with an ultraviolet reflective film.

7. An industrial ultrapure water preparation system according to claim 1 or 6, characterized in that: The ultraviolet lamp tube of the ultraviolet sterilization device (4) is an amalgam sterilization lamp or an ultraviolet LED lamp.

8. The industrial ultrapure water preparation system according to claim 1, characterized in that: The reverse osmosis device (6) adopts a two-stage reverse osmosis system. The permeate from the first-stage reverse osmosis section enters the second-stage reverse osmosis section for secondary desalination, and the concentrate from the second-stage reverse osmosis section is returned to the ultrafiltration water tank (5).

9. An industrial ultrapure water preparation system according to claim 1 or 8, characterized in that: The inlet pipeline of the reverse osmosis device (6) is sequentially equipped with a first dosing point, a second dosing point and a mixer. The first dosing point is connected to a reducing agent dosing tank and the second dosing point is connected to a scale inhibitor dosing tank.

10. An industrial ultrapure water preparation system according to claim 1, characterized in that: The filter membrane (8) is a PTFE hydrophobic filter membrane with a pore size of 0.2μm or 0.5μm.

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