Efficient ultrapure water equipment

Abstract

The utility model discloses ultrapure water equipment. Comprising a raw water tank, a multi-stage filtering device, a first precision filter, a first booster pump, a first-stage RO main machine, a first pure water tank, a second booster pump, a second-stage RO main machine, a second pure water tank, a first delivery pump, a second precision filter, an EDI device, an ultrapure water tank, a second delivery pump and a polishing mixed bed which are sequentially connected together through pipelines, a waste discharge port of the first-stage RO main machine is connected with the concentrated water tank through a concentrated water pipe, a waste discharge port of the second-stage RO main machine is connected with the raw water tank through a waste water pipe, a concentrated water return pipe is arranged between the concentrated water pipe and the first booster pump, the concentrated water return pipe is connected to a water inlet pipe of the first booster pump, and a return valve is arranged on the concentrated water return pipe; the first-stage RO main machine and the second-stage RO main machine are separately arranged, so that the water pressure of reverse osmosis is ensured, and the water yield of pure water is ensured; the blockage of the membrane is relieved, and the service life of the membrane is prolonged; the pressure of the pure water conveyed to the EDI device is improved, and the water yield of the EDI device is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of pure water treatment technology, and more specifically relates to a high-efficiency ultrapure water equipment. Background Technology

[0002] To meet the demands of high-precision analytical experiments and the production of ultra-precision components, ultrapure water is required. This means that after the raw water is purified by multiple reverse osmosis modules in the RO (Reverse Osmosis) unit, it undergoes further purification via an EDI (Electrodialysis) device using electrodialysis and immediate exchange technology to remove electrolyzed ions, resulting in ultrapure water. However, current RO units typically use multiple reverse osmosis modules connected in parallel or series. In parallel connection, the pretreatment water is simultaneously connected, and the resulting concentrate is discharged into the concentrate tank via a concentrate pipe. However, the reverse osmosis capacity of a single module is limited and cannot maximize the purification of the pretreatment water, resulting in low pure water extraction efficiency and a relatively low concentration of the concentrate produced. This makes the concentrate less valuable for reuse, and most of the concentrated water is simply discharged directly into the sewer system, leading to waste. In series connection, the water pressure within the reverse osmosis membrane decreases progressively, reducing the reverse osmosis capacity of subsequent modules and consequently decreasing the water production. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-efficiency ultrapure water equipment, which separately sets up a primary RO host and a secondary RO host. The primary RO host uses a parallel and series connection to connect several reverse osmosis modules, which can maximize the production of pure water from pretreated water and improve the pure water production efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency ultrapure water equipment, comprising a raw water tank, a multi-stage filtration device, a first precision filter, a first booster pump, a first-stage RO host, a first pure water tank, a second booster pump, a second-stage RO host, a second pure water tank, a first transfer pump, a second precision filter, an EDI device, an ultrapure water tank, a second transfer pump, and a polishing mixed bed, all connected sequentially by pipes. The waste outlet of the first-stage RO host is connected to the concentrated water tank via a concentrated water pipe, and the waste outlet of the second-stage RO host is connected to the raw water tank via a wastewater pipe. The first-stage RO host is equipped with parallel modules and series modules. The parallel modules include at least two reverse osmosis modules one and two, and the series modules include at least two reverse osmosis modules three and four. The parallel modules are connected to the series modules. The second-stage RO host is equipped with at least two reverse osmosis modules connected in series.

[0005] Each reverse osmosis module includes one pure water outlet and two dual-purpose outlets, which can be used as either a concentrate outlet or a raw water inlet.

[0006] In the first-stage RO unit, one of the dual-purpose ports of reverse osmosis modules one and two is connected to the first booster pump as the raw water inlet, and the other dual-purpose port of reverse osmosis modules one and two is used as the concentrate outlet. After being connected in parallel, it is connected to one dual-purpose port of reverse osmosis module three. The other dual-purpose port of reverse osmosis module three is connected to one dual-purpose port of reverse osmosis module four. The other dual-purpose port of reverse osmosis module four is connected to the concentrate tank. The pure water outlets of reverse osmosis modules one, two, three and four are connected in parallel to each other and connected to the first pure water tank.

[0007] In the secondary RO unit, the pure water outlets of all reverse osmosis modules are connected in parallel to the second pure water tank. One dual-purpose port of the first reverse osmosis module is connected to the second booster pump, and one dual-purpose port of the last reverse osmosis module is connected to the raw water tank. The reverse osmosis modules in the middle are connected in series through two dual-purpose ports.

[0008] Furthermore, a concentrated water return pipe is provided between the concentrated water pipe and the first booster pump, and the concentrated water return pipe is connected to the inlet pipe of the first booster pump. A return valve is provided on the concentrated water return pipe.

[0009] Furthermore, a UV sterilization device is installed between the EDI device and the ultrapure water tank.

[0010] Furthermore, a pure water return pipe is installed on the pipeline between the UV sterilization device and the ultrapure water tank. The pure water return pipe is connected to the second pure water tank, and a valve is installed on the pure water return pipe.

[0011] Furthermore, a TOC sterilization device is provided between the second delivery pump and the polishing mixing bed.

[0012] Furthermore, a 0.22μm filter is installed on the outlet pipe of the polishing mixed bed, and the outlet pipe of the 0.22μm filter is connected to several water points and passes through a pipeline.

[0013] Furthermore, a residual chlorine reduction device is installed on one side of the raw water tank.

[0014] Furthermore, a pH adjustment device is installed on one side of the first pure water tank.

[0015] Furthermore, a bypass pipe is provided between the inlet pipe and the outlet pipe of both the first booster pump and the second booster pump, and a pressure valve is provided on the bypass pipe. A pressure protection switch is provided on both the inlet pipe and the outlet pipe of both the first booster pump and the second booster pump.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: When the first-stage RO host is running, the pretreated water first enters the first and second reverse osmosis modules, and the pure water produced directly enters the first pure water tank. The concentrated water produced enters the third reverse osmosis module for further concentration, and the pure water produced enters the first pure water tank. Then, the concentrated water produced enters the fourth reverse osmosis module for further concentration, and the pure water produced enters the first pure water tank. The completely concentrated water produced is then discharged into the concentration tank. Therefore, it can maximize the production of pure water from the pretreated water and improve the pure water production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-efficiency ultrapure water equipment according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the first-stage RO host in a high-efficiency ultrapure water equipment according to this utility model.

[0019] Figure reference numerals: Raw water tank 1; First precision filter 2; First booster pump 3; First-stage RO main unit 4; First pure water tank 5; Second booster pump 6; Second-stage RO main unit 7; Second pure water tank 8; First transfer pump 9; Second precision filter 10; EDI device 11; Ultrapure water tank 12; Second transfer pump 13; Polishing mixed bed 14; Concentrated water pipe 15; Concentrated water tank 16; Wastewater pipe 17; Concentrated water return pipe 18; Return valve 19; Raw water transfer pump 20; Multi-media filter 21; Softening filter 22; Residual chlorine reduction device 23; pH adjustment device 24; Pure water return pipe 25; UV sterilization device 26; TOC sterilization device 27; 0.22μm filter 28; Reverse osmosis module one 29; Reverse osmosis module two 30; Reverse osmosis module three 31; Reverse osmosis module four 32. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0022] Reference Figure 1 and Figure 2 The present invention will be further described below.

[0023] A high-efficiency ultrapure water equipment includes a raw water tank, a multi-stage filtration device, a first precision filter, a first booster pump, a first-stage RO main unit, a first pure water tank, a second booster pump, a second-stage RO main unit, a second pure water tank, a first transfer pump, a second precision filter, an EDI device, an ultrapure water tank, a second transfer pump, and a polishing mixed bed, all connected sequentially by pipelines. The waste outlet of the first-stage RO main unit is connected to the concentrated water tank via a concentrated water pipe, and the waste outlet of the second-stage RO main unit is connected to the raw water tank via a wastewater pipe. The first-stage RO main unit is equipped with parallel modules and series modules. The parallel modules include at least two reverse osmosis modules one and two, and the series modules include at least two reverse osmosis modules three and four. The parallel modules are connected to the series modules. The second-stage RO main unit is equipped with at least two reverse osmosis modules connected in series.

[0024] Each reverse osmosis module includes one pure water outlet and two dual-purpose outlets, which can be used as either a concentrate outlet or a raw water inlet.

[0025] In the first-stage RO unit, one of the dual-purpose ports of reverse osmosis modules one and two is connected to the first booster pump as the raw water inlet, and the other dual-purpose port of reverse osmosis modules one and two is used as the concentrate outlet. After being connected in parallel, it is connected to one dual-purpose port of reverse osmosis module three. The other dual-purpose port of reverse osmosis module three is connected to one dual-purpose port of reverse osmosis module four. The other dual-purpose port of reverse osmosis module four is connected to the concentrate tank. The pure water outlets of reverse osmosis modules one, two, three and four are connected in parallel to each other and connected to the first pure water tank.

[0026] In the secondary RO unit, the pure water outlets of all reverse osmosis modules are connected in parallel to the second pure water tank. One dual-purpose port of the first reverse osmosis module is connected to the second booster pump, and one dual-purpose port of the last reverse osmosis module is connected to the raw water tank. The reverse osmosis modules in the middle are connected in series through two dual-purpose ports.

[0027] like Figure 1As shown, the principle of ultrapure water production by this equipment is as follows: The raw water in the raw water tank first passes through a multi-stage filter and a precision filter to become pre-treated water. After being pressurized by the first booster pump, it enters the first-stage RO host for the first reverse osmosis filtration. The filtered pure water enters the first pure water tank, while the concentrated water is discharged into the concentrated water tank. The pure water in the first pure water tank is then pressurized by the second booster pump and enters the second-stage RO host for the second reverse osmosis filtration. The filtered pure water enters the second pure water tank. The discharged wastewater, due to its relatively good water quality, is discharged back to the raw water tank for reuse. Then, the first transfer pump transports the pure water in the second pure water tank to the second precision filter for further precision filtration before being sent to the EDI device. The produced ultrapure water enters the ultrapure water tank, and then the second transfer pump transports the ultrapure water to the polishing mixed bed for further removal of residual trace ions in the ultrapure water. Finally, it is sent to the point of use.

[0028] like Figure 2 As described above, when the first-stage RO unit is running, the pretreated water first enters the first and second reverse osmosis modules, and the resulting pure water directly enters the first pure water tank. The resulting concentrated water enters the third reverse osmosis module for further concentration, and the resulting pure water then enters the first pure water tank. The resulting concentrated water then enters the fourth reverse osmosis module for further concentration, and the resulting pure water enters the first pure water tank. The resulting fully concentrated water is then discharged into the concentrated water tank. Therefore, the first-stage RO unit uses a combination of parallel and series connections for reverse osmosis, which can maximize the production of pure water from the pretreated water and improve the pure water production efficiency.

[0029] The secondary RO unit is connected in series to improve the reverse osmosis effect.

[0030] Specifically, the parallel modules and series modules in the primary RO unit can be set to three, four or more reverse osmosis modules. However, considering the cost, the reverse osmosis capacity of the reverse osmosis modules themselves, and the secondary RO unit behind them, the number of reverse osmosis modules in the parallel and series modules is best set to two or three, that is, more than 6 reverse osmosis modules in the primary RO unit.

[0031] like Figure 1 As mentioned above, a first delivery pump is installed before the EDI device to increase the pressure of the pure water supplied to the EDI device, thereby ensuring the water production of the EDI device.

[0032] like Figure 1 As shown, a raw water transfer pump is installed between the raw water tank and the multi-stage filter to transfer raw water.

[0033] like Figure 1 As shown, a concentrate pump is installed on one side of the concentrate tank to transport the concentrate to other water usage points. If no concentrate pump is installed, the concentrate can be directly discharged into the sewer.

[0034] like Figure 1 As shown in the example, preferably, a concentrated water return pipe is provided between the concentrated water pipe and the first booster pump, and the concentrated water return pipe is connected to the inlet pipe of the first booster pump. A return valve is provided on the concentrated water return pipe.

[0035] Specifically, when the return valve on the concentrate return pipe is opened, a portion of the concentrate in the concentrate pipe flows back to the inlet pipe of the first booster pump, mixes with the pre-treated water (water filtered by a multi-stage filtration device and the first precision filter), and is pressurized before entering the first-stage RO unit. Because the concentration of the pre-treated water is increased, the water flow rate and feed rate in the reverse osmosis membrane of the first-stage RO unit can be increased, thereby reducing membrane clogging and extending the membrane's service life.

[0036] like Figure 1 As shown, specifically, the multi-stage filtration device includes a quartz sand filter and a softening filter. The quartz sand filter removes large particulate impurities from the raw water, and then the softening filter removes calcium and magnesium ions from the water.

[0037] Specifically, a softening salt tank is provided on one side of the softening filter for regenerating the resin in the softening filter.

[0038] like Figure 1 As shown in this example, preferably, the number of reverse osmosis modules in the first-stage RO host is greater than the number of reverse osmosis modules in the second-stage RO host, thereby improving the reverse osmosis effect in the first reverse osmosis stage.

[0039] like Figure 1 As shown in this example, preferably, a UV sterilization device is installed between the EDI device and the ultrapure water tank to perform the first sterilization and disinfection of the ultrapure water.

[0040] like Figure 1 As shown in this example, preferably, a pure water return pipe is provided on the pipeline between the UV sterilization device and the ultrapure water tank, the pure water return pipe is connected to the second pure water tank, and a valve is provided on the pure water return pipe.

[0041] Specifically, if the ultrapure water quality does not meet the required value, it is returned to the second pure water tank through the pure water return pipe for re-filtration. In addition, when the ultrapure water tank is full, the excess ultrapure water is also vertically transferred to the second water tank through the pure water return pipe to keep the EDI device in working condition and ensure its electrodialysis and ion exchange effects.

[0042] like Figure 1 As shown in this example, preferably, a TOC sterilization device is provided between the second delivery pump and the polishing mixed bed to remove organic carbon from the ultrapure water.

[0043] like Figure 1As shown in this example, preferably, the outlet pipe of the polishing mixed bed is equipped with a 0.22μm filter. The outlet pipe of the 0.22μm filter is connected to several water points and is used to intercept all substances larger than 0.22μm through the pipeline, thereby further improving the water quality of ultrapure water and preventing leakage of polishing resin in the polishing mixed bed from contaminating the ultrapure water.

[0044] like Figure 1 As shown in this example, preferably, a residual chlorine reduction device is installed on one side of the raw water tank to remove residual chlorine from the raw water, thereby avoiding damage to the reverse osmosis membrane and reducing the membrane's filtration effect.

[0045] like Figure 1 As shown in this example, preferably, a pH adjustment device is provided on one side of the first pure water tank to adjust the pH value of the pure water in the first pure water tank, so as to improve the desalination rate of the reverse osmosis membrane in the secondary RO host, so as to balance the internal carbonate system of the pure water and keep it at 7.5-7.8 for the highest desalination rate, avoid membrane scaling, and improve membrane life.

[0046] like Figure 1 As shown in the example, preferably, a bypass pipe is provided between the inlet and outlet pipes of the first and second booster pumps. A pressure valve is installed on the bypass pipe. Pressure protection switches are installed on both the inlet and outlet pipes of the first and second booster pumps. The bypass pipe can prevent the instantaneous water pressure from being too high when the pump starts, which could damage the rubber ring of the reverse osmosis membrane inside the RO unit. Damage to the rubber ring will affect the reverse osmosis effect. The pressure protection switches are a low-pressure protection switch and a high-pressure protection switch. The low-pressure protection switch is located on the inlet pipe of the booster pump, which starts the booster pump when the pressure is low. The high-pressure protection switch is located on the outlet pipe of the booster pump, which shuts down the booster pump when the pressure is high.

[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A high-efficiency ultrapure water equipment, characterized in that: The system includes, in sequence, a raw water tank, a multi-stage filtration device, a first precision filter, a first booster pump, a first-stage RO unit, a first pure water tank, a second booster pump, a second-stage RO unit, a second pure water tank, a first transfer pump, a second precision filter, an EDI device, an ultrapure water tank, a second transfer pump, and a polishing mixed bed. The waste outlet of the first-stage RO unit is connected to the concentrated water tank via a concentrated water pipe, and the waste outlet of the second-stage RO unit is connected to the raw water tank via a wastewater pipe. The first-stage RO unit is equipped with parallel modules and series modules. The parallel modules include at least two reverse osmosis modules one and two, and the series modules include at least two reverse osmosis modules three and four. The parallel modules are connected to the series modules. The second-stage RO unit is equipped with at least two reverse osmosis modules connected in series. Each reverse osmosis module includes one pure water outlet and two dual-purpose outlets, which can be used as either a concentrate outlet or a raw water inlet. In the first-stage RO unit, one of the dual-purpose ports of reverse osmosis modules one and two is connected to the first booster pump as the raw water inlet, and the other dual-purpose port of reverse osmosis modules one and two is used as the concentrate outlet. After being connected in parallel, it is connected to one dual-purpose port of reverse osmosis module three. The other dual-purpose port of reverse osmosis module three is connected to one dual-purpose port of reverse osmosis module four. The other dual-purpose port of reverse osmosis module four is connected to the concentrate tank. The pure water outlets of reverse osmosis modules one, two, three and four are connected in parallel to each other and connected to the first pure water tank. In the secondary RO unit, the pure water outlets of all reverse osmosis modules are connected in parallel to the second pure water tank. One dual-purpose port of the first reverse osmosis module is connected to the second booster pump, and one dual-purpose port of the last reverse osmosis module is connected to the raw water tank. The reverse osmosis modules in the middle are connected in series through two dual-purpose ports.

2. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: A concentrated water return pipe is provided between the concentrated water pipe and the first booster pump, and the concentrated water return pipe is connected to the inlet pipe of the first booster pump. A return valve is provided on the concentrated water return pipe.

3. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: A UV sterilization device is installed between the EDI device and the ultrapure water tank.

4. The high-efficiency ultrapure water equipment according to claim 3, characterized in that: A pure water return pipe is installed on the pipeline between the UV sterilization device and the ultrapure water tank. The pure water return pipe is connected to the second pure water tank, and a valve is installed on the pure water return pipe.

5. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: A TOC sterilization device is installed between the second delivery pump and the polishing mixing bed.

6. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: The polishing mixed bed is equipped with a 0.22μm filter on its outlet pipe. The outlet pipe of the 0.22μm filter is connected to several water points and passes through a pipeline.

7. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: A residual chlorine reduction device is installed on one side of the raw water tank.

8. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: A pH adjustment device is installed on one side of the first pure water tank.

9. The high-efficiency ultrapure water equipment according to claim 1, characterized in that: A bypass pipe is provided between the inlet pipe and the outlet pipe of the first booster pump and the second booster pump. A pressure valve is provided on the bypass pipe. A pressure protection switch is provided on the inlet pipe and the outlet pipe of the first booster pump and the second booster pump.

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