Preparation system of industrial pure water
By pre-concentrating the raw water through FO-RO coupling design and a draw liquid circulation system, the problem of slow water production rate in the reverse osmosis process is solved, and a higher water production rate is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING YRD ECO DEV RI CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-08
AI Technical Summary
Current technologies only use reverse osmosis to desalinate raw water, resulting in a slow water production rate.
The FO-RO coupling design utilizes the FO membrane module and the draw solution circulation system to pre-concentrate the raw water, reducing the osmotic pressure of the raw water and making it easier for water molecules to pass through the RO membrane of the reverse osmosis machine.
It improves the water production rate and solves the problem of slow water production rate in existing technologies.
Smart Images
Figure CN224212544U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pure water preparation technology, and in particular to an industrial pure water preparation system. Background Technology
[0002] Pure water is water with extremely high chemical purity. It 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. It is mainly used in fields such as biology, chemical engineering, metallurgy, aerospace, and power.
[0003] In existing technologies, the preparation of pure water usually revolves around desalination of raw water using reverse osmosis. Pretreatment and post-treatment processes are set up upstream and downstream of the reverse osmosis process, respectively. The pretreatment process provides suitable feed water conditions for reverse osmosis and protects the RO membrane from fouling and damage. The post-treatment process further purifies the water quality to obtain pure water with higher purity. However, using only reverse osmosis to desalinate raw water results in a slow water production rate. Utility Model Content
[0004] The purpose of this application is to provide an industrial pure water preparation system to solve the technical problem that the existing technology of using only reverse osmosis to desalinate raw water results in a slow water production rate.
[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:
[0006] An industrial pure water preparation system includes a raw water tank, a raw water pump, a pretreatment module, an osmosis desalination module, an EDI machine, and a pure water tank connected in sequence.
[0007] The osmosis desalination module includes an FO membrane module, a draw solution circulation system, and a reverse osmosis machine. One end of the raw water channel of the FO membrane module is connected to the pretreatment module, the other end of the raw water channel of the FO membrane module is connected to the reverse osmosis machine, the other end of the reverse osmosis machine is connected to the EDI machine, and the draw solution circulation system is connected to the draw solution channel of the FO membrane module.
[0008] In an industrial pure water preparation system described in this application embodiment, the pretreatment module includes a hydrocyclone separator, an electrocoagulation device, an ultrafiltration machine, an ultraviolet sterilizer, and a buffer water tank connected in sequence.
[0009] The hydrocyclone separator is connected to the raw water tank via the raw water pump, and the buffer tank is connected to the raw water channel of the FO membrane module via the outlet pipe.
[0010] In an industrial pure water preparation system described in this application embodiment, the pretreatment module further includes an ultrasonic self-cleaning filter, the two ends of which are connected to the electrocoagulation device and the ultrafiltration machine, respectively.
[0011] In an industrial pure water preparation system described in this application embodiment, an RO concentrate pipe is provided between the reverse osmosis machine and the raw water tank, and a first flow control valve and a heat exchanger are sequentially provided on the RO concentrate pipe along the direction from the reverse osmosis machine to the raw water tank.
[0012] The hot-side inlet of the heat exchanger is connected to the first flow control valve, and its hot-side outlet is connected to the raw water tank. The cold-side inlet of the heat exchanger is connected to the raw water tank, and its cold-side outlet is connected to the raw water pump.
[0013] In an industrial pure water preparation system described in this application embodiment, an EDI concentrate pipe is provided between the EDI machine and the buffer water tank, and a second flow control valve is provided on the EDI concentrate pipe.
[0014] In an industrial pure water preparation system described in this application embodiment, the draw liquid circulation system includes a storage tank, an online concentration meter, and a circulation pump;
[0015] The storage tank is used to store the extractant and has an outlet, an inlet, and a dosing port. The outlet is connected to the circulation pump, and the other end of the circulation pump is connected to the inlet of the extractant channel of the FO membrane module. The outlet of the extractant channel of the FO membrane module is connected to the inlet. The online concentration meter is installed in the storage tank and is used to detect the concentration of the extractant in real time.
[0016] In an industrial pure water preparation system described in this application embodiment, the storage tank is equipped with a heating coil, a steam pipe, and a temperature sensor;
[0017] The heating coil is coiled on the inner wall of the storage tank, the steam pipe is located at the top of the storage tank, and its other end is spirally coiled around the water outlet pipe and connected to the raw water tank.
[0018] In the industrial pure water preparation system described in this application embodiment, the extractant is magnesium chloride.
[0019] In an industrial pure water preparation system described in this application embodiment, a pulsed water flow generator is provided between the reverse osmosis machine and the EDI machine.
[0020] The industrial pure water preparation system described in this application embodiment also includes a control system, wherein the raw water pump, pretreatment module, extractant circulation system, reverse osmosis machine and EDI machine are all electrically connected to the control system.
[0021] Compared with the prior art, the embodiments of this application have the following beneficial effects:
[0022] As can be seen from the above technical solution, the industrial pure water preparation system provided in this application adopts an FO-RO coupling design to replace simple RO. It uses FO membrane components and a draw liquid circulation system to pre-concentrate the raw water, reduce the osmotic pressure of the raw water, and make it easier for water molecules to pass through the RO membrane of the reverse osmosis machine, thereby increasing the water production rate. This solves the technical problem of slow water production rate in the prior art that only uses reverse osmosis process to desalinate the raw water. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The drawings are not intended to be drawn to scale, and for clarity, not every component will be labeled in each drawing. The drawings described below are merely some embodiments of this application. Those skilled in the art can obtain other drawings based on these drawings without creative effort. Wherein:
[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.
[0025] Figure 2 for Figure 1 A magnified view of part A in the diagram.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1-Raw water tank, 2-Raw water pump, 3-EDI machine, 4-Pure water tank, 5-FO membrane module, 6-Reverse osmosis machine, 7-Raw water channel, 8-Suction liquid channel, 9-Cyclone separator, 10-Electrocoagulation device, 11-Ultrafiltration machine, 12-Ultraviolet sterilizer, 13-Buffer water tank, 14-Outlet water pipe, 15-Self-cleaning filter, 16-RO concentrate pipe, 17-First flow control valve, 18-Heat exchanger, 19-EDI concentrate pipe, 20-Second flow control valve, 21-Storage tank, 22-Circulation pump, 23-Heating coil, 24-Steam pipe, 25-Pulse water flow generator. Detailed Implementation
[0028] Currently, the production of pure water usually only uses reverse osmosis to desalinate the raw water, resulting in a slow water production rate.
[0029] In view of this, the present application provides an industrial pure water preparation system, which is designed to replace simple RO with an FO-RO coupled design. The raw water is pre-concentrated by using FO membrane components and a draw liquid circulation system to reduce the osmotic pressure of the raw water, making it easier for water molecules to pass through the RO membrane of the reverse osmosis machine, thereby increasing the water production rate. This solves the technical problem of slow water production rate in the prior art that only uses reverse osmosis process to desalinate raw water.
[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0031] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0034] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0035] This application provides an industrial pure water preparation system, such as... Figure 1 and Figure 2 As shown. An industrial pure water preparation system includes a raw water tank 1, a raw water pump 2, a pretreatment module, an osmosis desalination module, an EDI machine 3, a pure water tank 4, and a control system connected in sequence.
[0036] The raw water tank 1 is used to store raw water, and the raw water pump 2 is used to pump the raw water in the raw water tank 1 into the pretreatment module, which is used to pretreat the raw water.
[0037] The desalination module includes an FO membrane module 5, a draw solution circulation system, and a reverse osmosis unit 6. One end of the raw water channel 7 of the FO membrane module 5 is connected to the pretreatment module, and the other end of the raw water channel 7 of the FO membrane module 5 is connected to the reverse osmosis unit 6. The other end of the reverse osmosis unit 6 is connected to the EDI unit 3, and the other end of the EDI unit 3 is connected to the pure water tank 4. The draw solution circulation system is connected to the draw solution channel 8 of the FO membrane module 5. The raw water pump 2, the pretreatment module, the draw solution circulation system, the reverse osmosis unit 6, and the EDI unit 3 are all electrically connected to the control system.
[0038] Specifically, the pretreatment module includes a hydrocyclone separator 9, an electrocoagulation device 10, a self-cleaning filter 15, an ultrafiltration machine 11, an ultraviolet sterilizer 12, and a buffer tank 13 connected in sequence. The hydrocyclone separator 9 is connected to the raw water tank 1 via the raw water pump 2. The buffer tank 13 is connected to the raw water channel 7 of the FO membrane assembly 5 via an outlet pipe 14. The extractant circulation system includes a storage tank 21, an online concentration meter, and a circulation pump 22. The storage tank 21 is used to store the extractant and has an outlet, an inlet, and a dosing port. The outlet is connected to the circulation pump 22. The other end of the circulating pump 22 is connected to the inlet of the FO membrane module 5's absorbent channel 8, and the outlet of the FO membrane module 5's absorbent channel 8 is connected to the inlet. The online concentration meter is installed in the storage tank 21 to detect the concentration of the absorbent in real time. The storage tank 21 is equipped with a heating coil 23, a steam pipe 24, and a temperature sensor. The heating coil 23 is coiled on the inner wall of the storage tank 21, and the steam pipe 24 is located at the top of the storage tank 21. Its other end is spirally coiled around the outlet pipe 14 and connected to the raw water tank 1.
[0039] The control system can be a PLC. The control system is electrically connected to the raw water pump 2, hydrocyclone separator 9, electrocoagulation device 10, self-cleaning filter 15, ultrafiltration machine 11, ultraviolet sterilizer 12, online concentration meter, circulating pump 22, heating coil 23, temperature sensor, reverse osmosis machine 6, and EDI machine 3. It should be noted that the electrical connection methods between each structure and the control module are mature existing technologies, and no specific limitations are imposed here. Those skilled in the art can select appropriate electrical connection methods according to actual needs and the specific models of each structure. The flow separator 9 is used to quickly remove large suspended solids and reduce the load on subsequent treatment. The electrocoagulation device 10 generates flocculant through an electrochemical reaction with the raw water to coagulate fine particles. The self-cleaning filter 15 is used to intercept the small flocs remaining after electrocoagulation. The ultrafiltration machine 11 is used to retain bacteria, viruses, and large organic molecules. The ultraviolet sterilizer 12 is used to kill bacteria and viruses that leak through the ultrafiltration and decompose residual chlorine. The circulation pump 22 is used to circulate the draw liquid in the storage tank 21 within the draw liquid channel 8 of the FO membrane module 5. The heating coil 23 circulates the draw liquid in the storage tank 21. The draw solution is evaporated and concentrated to maintain the required draw solution concentration. Specifically, in this embodiment, the draw solution is a magnesium chloride solution. It should be noted that those skilled in the art can select other draw solutions such as sodium chloride, calcium chloride, or ammonium bicarbonate, depending on the specific water quality of the raw water. The temperature sensor is used to collect the temperature of the draw solution in real time. The intermediate water tank is used for buffering and stabilizing the flow, allowing the raw water to slowly enter the FO membrane module 5. The FO membrane module 5 and the draw solution circulation system are used to pre-concentrate the raw water, increasing the water production rate of the reverse osmosis unit 6. The reverse osmosis unit 6 is used for... Deep desalination is performed by the EDI machine 3, which further treats the water produced by the reverse osmosis machine 6 to remove trace ions. The steam pipe 24 is coiled around the outlet pipe 14 and exchanges heat with the outlet pipe 14 to increase the temperature of the raw water entering the FO membrane module 5, thereby increasing the water production rate of the reverse osmosis machine 6. The waste heat generated by evaporating the absorbent is used to heat the raw water entering the FO membrane module 5, improving energy utilization and effectively reducing energy consumption. After heat exchange and condensation, the steam in the steam pipe 24 is returned to the raw water tank 1, reducing water consumption.
[0040] In some preferred embodiments, an RO concentrate pipe 16 is provided between the reverse osmosis machine 6 and the raw water tank 1. A first flow control valve 17 and a heat exchanger 18 are sequentially arranged on the RO concentrate pipe 16 along the direction from the reverse osmosis machine 6 to the raw water tank 1. The hot side inlet of the heat exchanger 18 is connected to the first flow control valve 17, and its hot side outlet is connected to the raw water tank 1. The cold side inlet of the heat exchanger 18 is connected to the raw water tank 1, and its cold side outlet is connected to the raw water pump 2.
[0041] The system utilizes an RO concentrate pipe 16 to recycle and reuse the concentrate produced by the reverse osmosis unit 6, thereby improving the system recovery rate, reducing system wastewater discharge, saving water resources, and improving environmental benefits. The system also utilizes a heat exchanger 18 to increase the raw water temperature, thereby improving water production efficiency.
[0042] In some preferred embodiments, an EDI concentrate pipe 19 is provided between the EDI machine 3 and the buffer water tank 13. A second flow control valve 20 is provided on the EDI concentrate pipe 19. By providing the EDI concentrate pipe 19, the EDI concentrate discharged by the EDI machine 3 can be recovered, thereby improving the system recovery rate, reducing the system wastewater discharge, saving water resources, and improving environmental protection benefits.
[0043] In some preferred embodiments, a pulsed water flow generator 25 is provided between the reverse osmosis machine 6 and the EDI machine 3. By providing the pulsed water flow generator 25, the water flow pressure is periodically adjusted to form a turbulent scouring effect, which removes the contaminants attached to the RO membrane of the reverse osmosis machine 6, thereby improving the water production efficiency of the system.
[0044] In summary, the industrial pure water preparation system provided in this application adopts an FO-RO coupled desalination design to replace simple RO desalination. It uses FO membrane modules and a draw liquid circulation system to pre-concentrate the raw water, reduce the osmotic pressure of the raw water, and make it easier for water molecules to pass through the RO membrane of the reverse osmosis machine, thereby increasing the water production rate. This solves the technical problem of slow water production rate in the prior art that only uses reverse osmosis to desalinate raw water.
[0045] The above provides a detailed description of an industrial pure water preparation system provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A system for preparing industrial pure water, characterized in that, It includes a raw water tank, a raw water pump, a pretreatment module, an osmosis desalination module, an EDI machine, and a pure water tank, which are connected in sequence. The osmosis desalination module includes an FO membrane module, a draw solution circulation system, and a reverse osmosis machine. One end of the raw water channel of the FO membrane module is connected to the pretreatment module, the other end of the raw water channel of the FO membrane module is connected to the reverse osmosis machine, the other end of the reverse osmosis machine is connected to the EDI machine, and the draw solution circulation system is connected to the draw solution channel of the FO membrane module.
2. The industrial pure water preparation system as described in claim 1, characterized in that, The pretreatment module includes a hydrocyclone separator, an electrocoagulation device, an ultrafiltration machine, an ultraviolet sterilizer, and a buffer water tank connected in sequence. The hydrocyclone separator is connected to the raw water tank via the raw water pump, and the buffer tank is connected to the raw water channel of the FO membrane module via the outlet pipe.
3. The industrial pure water preparation system as described in claim 2, characterized in that, The pretreatment module also includes an ultrasonic self-cleaning filter, the two ends of which are connected to the electrocoagulation device and the ultrafiltration machine, respectively.
4. The industrial pure water preparation system as described in claim 2, characterized in that, An RO concentrate pipe is provided between the reverse osmosis machine and the raw water tank. A first flow control valve and a heat exchanger are sequentially provided on the RO concentrate pipe along the direction from the reverse osmosis machine to the raw water tank. The hot-side inlet of the heat exchanger is connected to the first flow control valve, and its hot-side outlet is connected to the raw water tank. The cold-side inlet of the heat exchanger is connected to the raw water tank, and its cold-side outlet is connected to the raw water pump.
5. The industrial pure water preparation system as described in claim 2, characterized in that, An EDI concentrate pipe is provided between the EDI machine and the buffer water tank, and a second flow control valve is provided on the EDI concentrate pipe.
6. The industrial pure water preparation system as described in claim 2, characterized in that, The extractant circulation system includes a storage tank, an online concentration meter, and a circulation pump; The storage tank is used to store the extractant and has an outlet, an inlet, and a dosing port. The outlet is connected to the circulation pump, and the other end of the circulation pump is connected to the inlet of the extractant channel of the FO membrane module. The outlet of the extractant channel of the FO membrane module is connected to the inlet. The online concentration meter is installed in the storage tank and is used to detect the concentration of the extractant in real time.
7. The industrial pure water preparation system as described in claim 6, characterized in that, The storage tank is equipped with a heating coil, a steam pipe, and a temperature sensor. The heating coil is coiled on the inner wall of the storage tank, the steam pipe is located at the top of the storage tank, and its other end is spirally coiled around the water outlet pipe and connected to the raw water tank.
8. The industrial pure water preparation system as described in claim 6, characterized in that, The extracting solution is magnesium chloride.
9. The industrial pure water preparation system as described in claim 1, characterized in that, A pulsed water flow generator is installed between the reverse osmosis machine and the EDI machine.
10. The industrial pure water preparation system as described in claim 1, characterized in that, It also includes a control system, to which the raw water pump, pretreatment module, extractant circulation system, reverse osmosis machine and EDI machine are all electrically connected.