Ultrapure water production system

Abstract

The utility model provides an ultrapure water production system. The ultrapure water production system comprises a secondary reverse osmosis water tank, ultrapure water equipment, a nitrogen-sealed water tank, a reuse water tank and a water return pipeline, the ultrapure water equipment is connected to the secondary reverse osmosis water tank; the nitrogen-sealed water tank is connected to the ultrapure water outlet end of the ultrapure water equipment through an ultrapure water outlet pipeline; the recycling water tank is connected to the concentrated water outlet end of the ultrapure water equipment through a concentrated water outlet pipeline; the water return pipeline is connected with the ultrapure water outlet end of the ultrapure water equipment; wherein the ultrapure water outlet pipeline is provided with a first valve, the water return pipeline is provided with a second valve, and the water return pipeline is used for being connected with filter pressing equipment. According to the utility model, the comprehensive utilization of the wastewater produced by the ultrapure water production system can be improved, and the water resource is saved.

Description

Technical Field

[0001] This utility model relates to the technical field of ultrapure water supply systems for factories, and more specifically, to an ultrapure water production system. Background Technology

[0002] Ultrapure water, also known as high-purity water, refers to water in which almost all conductive media have been removed, and non-dissociated colloidal substances, gases, and organic matter have been removed to very low levels. Ultrapure water has a salt content below 0.1 mg / L and a conductivity less than 0.1 μS / cm. The process flow for membrane-based ultrapure water production equipment is as follows: raw water—ultrafiltration—reverse osmosis—EDI (Electrodeionization, also known as continuous electrolytic desalination technology)—ultrapure water. In the membrane process, the quartz sand filter and activated carbon filter in the ultrafiltration process are used to remove suspended solids, colloids, and organic matter from the water, reducing turbidity, SDI (Silt Density Index), and COD (Chemical Oxygen Demand), enabling the reverse osmosis unit to operate safely and efficiently for wastewater reuse. Reverse osmosis further removes impurities such as organic matter, colloids, and bacteria, ensuring that the reverse osmosis effluent meets the requirements for EDI feed water. The EDI equipment then purifies the water to obtain ultrapure water. In actual use, on-site measurements showed that when the EDI equipment was first started, the secondary reverse osmosis water in the pipeline was ≤3μS / cm, which is acceptable. However, the EDI equipment's product water resistivity detection was slow, resulting in short-term water discharge and wasting secondary reverse osmosis water. Furthermore, the concentrated water produced by the EDI equipment was directly discharged into the wastewater pond without being comprehensively utilized. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] The technical problem this invention aims to solve is that existing EDI equipment wastes some water resources during actual operation.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides an ultrapure water production system, including a two-stage reverse osmosis water tank, an ultrapure water device, a nitrogen-sealed water tank, a recycled water tank, and a return water pipeline; the ultrapure water device is connected to the two-stage reverse osmosis water tank; the nitrogen-sealed water tank is connected to the ultrapure water outlet end of the ultrapure water device through an ultrapure water outlet pipeline; the recycled water tank is connected to the concentrated water outlet end of the ultrapure water device through a concentrated water outlet pipeline; the return water pipeline is connected to the ultrapure water outlet end of the ultrapure water device; wherein, the ultrapure water outlet pipeline is equipped with a first valve, the return water pipeline is equipped with a second valve, and the return water pipeline is used to connect to a filter press.

[0008] Preferably, the secondary reverse osmosis water tank is connected to the ultrapure water equipment via an outlet pipe.

[0009] Preferably, a water quality testing device is installed inside the water outlet pipe.

[0010] Preferably, the device further includes an alarm device, which is electrically connected to the water quality testing device.

[0011] Preferably, the ultrapure water equipment includes a booster pump, a heat exchanger, a germicidal lamp, a filter, an inlet valve, and an ultrapure water production module, which are connected in sequence by pipelines.

[0012] Preferably, the heat exchanger is a spiral tube heat exchanger.

[0013] Preferably, the germicidal lamp is a 254nm ultraviolet germicidal lamp.

[0014] Preferably, the filter is a pre-filter.

[0015] (III) Beneficial Effects

[0016] The above-mentioned technical solution of this utility model has at least the following advantages:

[0017] 1. In this utility model, the concentrated water produced by the ultrapure water equipment is collected and stored in a recycled water tank, and then pumped to the filter press equipment for cleaning. At the same time, the concentrated water can also dilute the wastewater produced by the filter press equipment, thereby reducing the thickness of the wastewater produced by the filter press equipment. This allows the concentrated water produced by the ultrapure water equipment to be comprehensively utilized, reducing the waste of water resources.

[0018] 2. In this utility model, the ultrapure water equipment is connected to the secondary reverse osmosis water tank through a return water pipe, so that the water produced when the ultrapure water equipment is first started is returned to the secondary reverse osmosis water tank for reuse, thereby enabling this part of the water to be comprehensively utilized and reducing the waste of water resources.

[0019] 3. In this invention, a water quality detection device is installed inside the outlet pipe. This device can detect the water quality output from the secondary reverse osmosis tank. A solenoid valve is installed on the outlet pipe, electrically connected to a controller. The controller is also electrically connected to the water quality detection device. The device detects the water quality data of the water output from the secondary reverse osmosis tank and feeds it back to the controller. When the water quality is substandard, the controller closes the solenoid valve to cut off the water flow to the outlet pipe, thus protecting the ultrapure water equipment. When the water quality meets the standards, the controller activates the solenoid valve to open the outlet pipe and supply water to the ultrapure water equipment. This design ensures that the ultrapure water equipment can only operate when the secondary reverse osmosis water quality is acceptable, protecting the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the ultrapure water production system provided in this embodiment of the utility model.

[0022] The labels for the attached figures are as follows:

[0023] 1. Secondary reverse osmosis water tank; 2. Conveyor belt; 3. Nitrogen-sealed water tank; 4. Reclaimed water tank; 5. Return water pipe; 6. Ultrapure water outlet pipe; 7. Concentrate water outlet pipe; 8. Filter press; 10. Circulation pump; 11. Outlet pipe; 21. Booster pump; 22. Heat exchanger; 23. Germicidal lamp; 24. Filter; 25. Inlet valve; 26. Ultrapure water production module. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or 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 do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this utility model is described in more detail below with reference to specific embodiments:

[0028] like Figure 1As shown, this embodiment of the present invention provides an ultrapure water production system, including a secondary reverse osmosis water tank 1, an ultrapure water device 2, a nitrogen-sealed water tank 3, a recycled water tank 4, and a return water pipe 5. The ultrapure water device 2 is connected to the secondary reverse osmosis water tank 1. The nitrogen-sealed water tank 3 is connected to the ultrapure water outlet of the ultrapure water device 2 via an ultrapure water outlet pipe 6. The recycled water tank 4 is connected to the concentrated water outlet of the ultrapure water device 2 via a concentrated water outlet pipe 7. The return water pipe 5 is connected to the ultrapure water outlet of the ultrapure water device 2. The ultrapure water outlet pipe 6 is equipped with a first valve, and the return water pipe 5 is equipped with a second valve. The return water pipe 5 is used to connect to a filter press 8. Specifically, water is treated by the secondary reverse osmosis device and stored in the secondary reverse osmosis water tank 1. Then, the water in the secondary reverse osmosis water tank 1 is transported to the ultrapure water device 2. The ultrapure water device 2 uses a mixed ion exchange resin to adsorb the anions and cations in the feed water. The adsorbed ions are removed by passing through the anion and cation exchange membranes under the action of a DC voltage. Between a pair of electrodes in an electrodialysis unit, multiple alternating sets of anion exchange membranes, cation exchange membranes, and septa typically form a concentrate chamber and a dilute chamber (i.e., cations can permeate through the cation exchange membrane, and anions can permeate through the anion exchange membrane). In the dilute chamber, cations migrate towards the negative electrode, permeate through the cation exchange membrane, and are retained by the anion exchange membrane in the concentrate chamber; conversely, anions migrate towards the positive electrode, permeate through the anion exchange membrane, and are retained by the cation exchange membrane in the concentrate chamber. This process gradually reduces the number of ions in the dilute chamber, resulting in ultrapure water, which is then pumped to various workshops for use by a circulation pump. Meanwhile, in the concentrate chamber, the continuous influx of cations and anions increases the concentration of electrolyte ions, resulting in concentrated water. This process achieves desalination, purification, concentration, or refining. The ion exchange resin is continuously regenerated electro-electrically, eliminating the need for acid and alkali regeneration. In existing technologies, concentrated water is directly discharged into wastewater treatment plants, resulting in water waste. In this embodiment, the concentrated water produced by the ultrapure water equipment 2 is collected and stored in the recycled water tank 4, and then pumped to the filter press 8 for cleaning. Simultaneously, the concentrated water also dilutes the wastewater produced by the filter press 8, reducing its viscosity and allowing for comprehensive utilization of the concentrated water, thus reducing water waste. Furthermore, in existing technologies, the EDI resistivity detection of the ultrapure water equipment 2 is slow during startup. Water produced during this period is discharged to the wastewater treatment plant and is not effectively utilized. Actual on-site measurements show that the secondary reverse osmosis water in the pipeline is ≤3μS / cm when the ultrapure water equipment 2 is first started, which is acceptable. In this embodiment, the ultrapure water equipment 2 is connected to the secondary reverse osmosis water tank 1 via a return water pipe 5, allowing the water produced during startup to be recycled back to the secondary reverse osmosis water tank 1 for reuse, thus enabling comprehensive utilization of this water and reducing water waste.Specifically, a valve is installed on the return water pipe 5. The valve is used to control the opening and closing of the return water pipe 5. When the ultrapure water equipment 2 is started, the valve is opened so that the water produced by the ultrapure water equipment 2 can flow back to the secondary reverse osmosis water tank 1 through the return water pipe 5. When the ultrapure water equipment 2 is running stably, the valve on the return water pipe 5 can be closed.

[0029] As one of the optional implementation methods of this embodiment, the secondary reverse osmosis water tank 1 is connected to the ultrapure water equipment 2 through the water outlet pipe 11.

[0030] In one optional implementation of this embodiment, a water quality detection device is installed inside the outlet pipe 11. Specifically, the water quality detection device is a water quality test probe, which can detect the water quality output from the secondary reverse osmosis water tank 1. A solenoid valve is installed on the outlet pipe 11, electrically connected to a controller, which in turn is electrically connected to the water quality detection device. The water quality detection device detects the water quality data of the water output from the secondary reverse osmosis water tank 1 and feeds it back to the controller. When the water quality is substandard, the controller controls the solenoid valve to close, thus cutting off the water supply to the outlet pipe 11 and protecting the ultrapure water equipment 2. When the water quality meets the standards, the controller controls the solenoid valve to open, allowing the outlet pipe 11 to connect and supply water to the ultrapure water equipment 2. Through this scheme, the ultrapure water equipment 2 can only operate when the secondary reverse osmosis water quality is qualified, thus protecting the ultrapure water equipment 2.

[0031] As one optional implementation of this embodiment, an alarm device is also included, which is electrically connected to the water quality testing device. Specifically, the alarm device is electrically connected to the controller, and when the water quality testing device detects that the water quality is substandard, the controller controls the alarm device to sound an alarm.

[0032] As one optional implementation of this embodiment, the ultrapure water equipment 2 includes a booster pump 21, a heat exchanger 22, a germicidal lamp 23, a filter 24, an inlet valve 25, and an ultrapure water production module 26, which are connected in sequence by pipelines. The booster pump 21 pumps water output from the secondary reverse osmosis water tank 1. The heat exchanger 22 is used to exchange heat with the water and control its temperature. The germicidal lamp 23 is used to kill bacteria in the water. The filter is used to filter suspended solids, colloids, and organic matter in the water and reduce turbidity. The inlet valve 25 is used to control the opening and closing of the pipeline. The ultrapure water production module 26 uses continuous electrolytic desalination technology to purify the water and obtain ultrapure water.

[0033] As one of the optional implementations of this embodiment, the heat exchanger 22 is a spiral tube heat exchanger.

[0034] As one of the optional implementations of this embodiment, the germicidal lamp 23 is a 254nm ultraviolet germicidal lamp.

[0035] As one of the optional implementations of this embodiment, filter 24 is a pre-filter.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrapure water production system, characterized in that, include: Secondary reverse osmosis water tank; The ultrapure water equipment is connected to the secondary reverse osmosis water tank; The nitrogen-sealed water tank is connected to the ultrapure water outlet of the ultrapure water equipment via an ultrapure water outlet pipeline; The recycled water tank is connected to the concentrated water outlet of the ultrapure water equipment via a concentrated water outlet pipe; The return water pipe is connected to the ultrapure water outlet of the ultrapure water equipment. The ultrapure water outlet pipe is equipped with a first valve, and the return water pipe is equipped with a second valve. The return water pipe is used to connect to the filter press equipment.

2. The ultrapure water production system as described in claim 1, characterized in that, The secondary reverse osmosis water tank is connected to the ultrapure water equipment via an outlet pipe.

3. The ultrapure water production system as described in claim 2, characterized in that, A water quality testing device is installed inside the water outlet pipe.

4. The ultrapure water production system as described in claim 3, characterized in that, It also includes an alarm device, which is electrically connected to the water quality testing device.

5. The ultrapure water production system as described in claim 1, characterized in that, The ultrapure water equipment includes a booster pump, a heat exchanger, a germicidal lamp, a filter, an inlet valve, and an ultrapure water production module, which are connected in sequence by pipelines.

6. The ultrapure water production system as described in claim 5, characterized in that, The heat exchanger is a spiral tube heat exchanger.

7. The ultrapure water production system as described in claim 5, characterized in that, The germicidal lamp is a 254nm ultraviolet germicidal lamp.

8. The ultrapure water production system as described in claim 5, characterized in that, The filter is a pre-filter.

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