System for preventing EDI module resin from being oxidized

Abstract

The utility model relates to the technical field of water treatment, and discloses a system for preventing EDI module resin from being oxidized, and the water outlet end of a raw water tank is sequentially connected with a quartz sand filter, an activated carbon filter and a security filter through pipelines. The water outlet end of the security filter is connected with the high-pressure pump; the output end of the high-pressure pump is connected with the primary reverse osmosis assembly. The output end of the first-stage RO component is connected with a first-stage RO water producing tank, and a water inlet electric valve is arranged on a pipeline. A primary return pipe is arranged at the front end of the water inlet electric valve, is communicated with the raw water tank and is provided with a water return electric valve. According to the system, the first-stage backflow pipe and the EDI concentrated water backflow pipe are additionally arranged, so that automatic backflow treatment of unqualified water is achieved, the unqualified water is prevented from entering the EDI module, and oxidation of EDI resin is effectively prevented. Meanwhile, the system is additionally provided with a residual chlorine meter and a pretreatment electric valve, so that automatic monitoring and treatment of EDI water inlet residual chlorine are realized, and the stability and the reliability of the system are further improved.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically a system for preventing the oxidation of EDI module resin. Background Technology

[0002] All-membrane water treatment technology is a highly efficient industrial water treatment method. It effectively removes pollutants and desalinates water by organically combining three membrane separation technologies: ultrafiltration (UF), multi-media / carbon tank, and reverse osmosis (RO) and electrodeionization (EDI). In recent years, due to its many advantages, such as no need for acid or alkali treatment, simple operation, excellent effluent quality, and stable performance, the all-membrane method has been widely used in power plants, chemical plants, and other fields.

[0003] Currently, the combination of two-stage reverse osmosis and electro-deionization (EDI) has become the most mature demineralized water treatment process. However, in actual operation, this process still has some problems, mainly concentrated in the EDI stage, such as oxidation and dry burning. These problems are often related to the ion exchange resin inside the EDI. Ion exchange resin is a polymer compound with functional groups and a network structure, usually existing in the form of spherical particles. These functional groups are chemically grafted onto the resin, thus exhibiting a certain degree of instability. When the redox potential (ORP) of the primary RO feed water or the residual chlorine of the EDI feed water exceeds 0.02 ppm, these functional groups are prone to detachment, leading to resin breakage. Resin breakage can clog the EDI channels, causing a sharp increase in feed water pressure and a decrease in permeate flow rate.

[0004] To prevent the oxidation of EDI resin, a common practice is to add a reducing agent (such as sodium bisulfite) to the primary RO feed water to control the ORP of the primary RO feed water to less than 200 mV. However, while this measure is simple, it cannot completely eliminate the oxidation problem of EDI.

[0005] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a system to prevent the oxidation of EDI module resin. Utility Model Content

[0006] The purpose of this invention is to provide a system for preventing the oxidation of resin in EDI modules, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A system technical solution for preventing EDI module resin oxidation includes a raw water tank. The outlet of the raw water tank is sequentially connected to a quartz sand filter, an activated carbon filter, and a security filter via pipes. The outlet of the security filter is connected to a high-pressure pump via a pipe. The output of the high-pressure pump is connected to a first-stage reverse osmosis (RO) module via a pipe. The output of the first-stage RO module is connected to a first-stage RO permeate tank via a pipe. An inlet electric valve is installed on the pipe. A first-stage reflux pipe is installed at the front end of the inlet electric valve. The first-stage reflux pipe is connected to the raw water tank and is equipped with a return electric valve.

[0009] As a preferred technical solution, dosing equipment is connected to both the inlet and outlet pipes of the security filter.

[0010] As a preferred technical solution, the outlet of the primary RO permeate tank is connected to a security filter via a pipeline, and a dosing device is connected to the pipeline.

[0011] As a preferred technical solution, the outlet of the security filter is connected to a secondary reverse osmosis component via a pipe, the secondary reverse osmosis component is connected to a secondary RO permeate tank via a pipe, the outlet of the secondary RO permeate tank is connected to a discharge pipe, and the discharge pipe is connected to an EDI module.

[0012] As a preferred technical solution, a residual chlorine meter is connected to the discharge pipe, a pretreatment electric valve is installed on the side adjacent to the residual chlorine meter, the pretreatment electric valve is connected to a pretreatment water tank through a pipe, and an EDI concentrate return pipe is connected to the EDI module.

[0013] As a preferred technical solution, the raw water tank is equipped with a raw water inlet pipe, a secondary RO concentrate return interface, and an EDI concentrate return interface.

[0014] As a preferred technical solution, the EDI concentrate return pipe is connected to the EDI concentrate return interface, and a secondary return pipe is provided at the bottom of the secondary reverse osmosis component, which is connected to the secondary RO concentrate return interface.

[0015] As a preferred technical solution, the EDI module is connected to an ultrapure water tank via a pipeline, and the output end of the ultrapure water tank is connected to an ultrapure water pump via a pipeline.

[0016] As a preferred technical solution, the bottom of the raw water tank, quartz sand filter, activated carbon filter, primary reverse osmosis component, primary RO permeate tank, and secondary RO permeate tank are all equipped with drain valves.

[0017] As a preferred technical solution, a high-pressure pump is installed on the inlet pipe of the secondary reverse osmosis component.

[0018] A return pipe is added to the inlet pipe of the primary RO permeate tank. The return water electric valve on the return pipe is interlocked with the ORP (Ore Flow Rate). When the ORP in the primary RO permeate tank exceeds 200, the return water electric valve in the loop automatically opens, and the inlet electric valve closes, effectively preventing substandard water from entering the next stage RO permeate tank and thus preventing it from entering the EDI (Electronic Diffusion Identification) system. When the ORP is less than 200mV, the inlet electric valve opens, and the return water electric valve closes, enabling automatic opening and closing.

[0019] A residual chlorine meter and an EDI concentrate return pipe are added to the EDI module inlet. When the residual chlorine in the EDI inlet exceeds 0.02 ppm, the pretreatment electric valve opens, discharging the water to the pretreatment tank, and the EDI module inlet valve automatically closes, effectively preventing substandard water from directly entering the EDI system. When the residual chlorine in the EDI inlet is less than 0.02 ppm, the EDI inlet valve opens, and the return valve closes, enabling automatic start and stop. These two stages of water return effectively prevent substandard water from entering the EDI system and causing oxidation of the EDI resin.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention relates to a system for preventing the oxidation of EDI module resin. The system incorporates a primary return pipe and an EDI concentrate return pipe, enabling automatic return treatment of substandard water quality, preventing it from entering the EDI module and effectively preventing EDI resin oxidation. Simultaneously, the system further enhances stability and reliability by adding a residual chlorine meter and a pretreatment electric valve, enabling automatic monitoring and treatment of residual chlorine in the EDI influent. Furthermore, the system boasts advantages such as simple structure, convenient operation, and high automation, effectively improving industrial water treatment efficiency and quality while reducing operating and maintenance costs. It has broad application prospects and market demand. This invention provides a system for preventing the oxidation of EDI module resin, offering significant advantages and practical application value, improving industrial water treatment efficiency and quality, and reducing operating and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a system for preventing resin oxidation in an EDI module.

[0023] Figure 2 This is a schematic diagram of the structure of an EDI module, which is a system for preventing the oxidation of the resin in an EDI module.

[0024] In the attached diagram, the following are the reference numerals: 1. Raw water tank; 11. Raw water inlet pipe; 12. Secondary RO concentrate return port; 13. EDI concentrate return port; 21. Quartz sand filter; 22. Activated carbon filter; 23. Security filter; 24. Drain valve; 3. Dosing equipment; 4. High-pressure pump; 51. Primary reverse osmosis module; 52. Secondary reverse osmosis module; 53. Secondary return pipe; 6. Primary RO product water tank; 61. Inlet electric valve; 62. Primary return pipe; 63. Return water electric valve; 7. Secondary RO product water tank; 71. Discharge pipe; 8. EDI module; 81. Residual chlorine meter; 82. Pretreatment electric valve; 83. Pretreatment water tank; 84. EDI concentrate return pipe; 9. Ultrapure water tank; 91. Ultrapure water pump. Detailed Implementation

[0025] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0026] like Figure 1 , Figure 2 As shown, this utility model provides a system technical solution for preventing the oxidation of EDI module resin: it includes a raw water tank 1, which serves as the starting point. Its outlet is connected sequentially to a quartz sand filter 21, an activated carbon filter 22, and a security filter 23 via pipes. The outlet of the security filter 23 is connected to a high-pressure pump 4 via a pipe, and the output of the high-pressure pump 4 is further connected to a first-stage reverse osmosis module 51. The output of the first-stage reverse osmosis module 51 is connected to a first-stage RO permeate tank 6 via a pipe, which is equipped with an inlet electric valve 61. A first-stage return pipe 62 is installed at the front end of the inlet electric valve 61, which is connected to the raw water tank 1, and a return electric valve 63 is installed on the first-stage return pipe 62.

[0027] Both the inlet and outlet pipes of the security filter 23 are equipped with dosing devices 3. The outlet of the primary RO permeate tank 6 is connected back to the security filter 23 via a pipe, and a dosing device 3 is also installed on this pipe. The outlet of the security filter 23 is then connected to the secondary reverse osmosis module 52 via a pipe, and a high-pressure pump 4 is installed on the inlet pipe of the secondary reverse osmosis module 52. The secondary reverse osmosis module 52 is then connected to the secondary RO permeate tank 7 via a pipe.

[0028] The outlet of the secondary RO permeate tank 7 is connected to a discharge pipe 71, which is connected to the EDI module 8. A residual chlorine meter 81 is installed on the discharge pipe 71, and a pretreatment electric valve 82 is installed on the adjacent side of the residual chlorine meter 81. The pretreatment electric valve 82 is connected to the pretreatment tank 83 via a pipe. In addition, the EDI module 8 is also equipped with an EDI concentrate return pipe 84.

[0029] The raw water tank 1 is equipped with a raw water inlet pipe 11, a secondary RO concentrate return interface 12, and an EDI concentrate return interface 13. The EDI concentrate return pipe 84 is connected to the EDI concentrate return interface 13. A secondary return pipe 53 is located at the bottom of the secondary reverse osmosis module 52, and this secondary return pipe 53 is connected to the secondary RO concentrate return interface 12.

[0030] Finally, the EDI module 8 is connected to the ultrapure water tank 9 via a pipeline, and the output end of the ultrapure water tank 9 is connected to the ultrapure water pump 91 via a pipeline. At the same time, the bottom of the raw water tank 1, the quartz sand filter 21, the activated carbon filter 22, the first-stage reverse osmosis component 51, the first-stage RO product water tank 6, and the second-stage RO product water tank 7 are all equipped with drain valves 24.

[0031] According to the above scheme, in this embodiment, during use, raw water enters the raw water tank 1 through the quartz sand filter 21, activated carbon filter 22, and security filter 23 for preliminary filtration. Then, it is pressurized by the high-pressure pump 4 and enters the first-stage reverse osmosis module 51. The water after first-stage reverse osmosis treatment enters the first-stage RO permeate tank 6. If the water quality in the first-stage RO permeate tank 6 is substandard, the return water electric valve 63 is opened and the inlet water electric valve 61 is closed. The substandard water flows back to the raw water tank 1 through the first-stage return pipe 62, achieving the return treatment of substandard first-stage RO permeate water. If the water quality in the first-stage RO permeate tank 6 is qualified, the inlet water electric valve 61 is opened and the return water electric valve 63 is closed. The first-stage RO permeate enters the security filter 23, undergoes further filtration, and then enters the second-stage reverse osmosis module 52. The water after second-stage reverse osmosis treatment enters the second-stage RO permeate tank 7. If the water quality in the secondary RO permeate tank 7 is substandard, the valve on the secondary return pipe 53 is opened, and the substandard water flows back to the raw water tank 1 through the secondary return pipe 53, thus achieving the return treatment of substandard water from the secondary RO permeate. If the water quality in the secondary RO permeate tank 7 is up to standard, it enters the EDI module 8 for further treatment. A residual chlorine meter 81 is installed at the inlet of the EDI module 8. When the residual chlorine in the EDI influent exceeds 0.02 ppm, the pretreatment electric valve 82 opens, discharging the substandard water to the pretreatment tank 83, while simultaneously closing the inlet valve of the EDI module 8 to prevent substandard water from directly entering the EDI module 8. When the residual chlorine in the EDI influent is less than 0.02 ppm, the pretreatment electric valve 82 closes, and the inlet valve of the EDI module 8 opens, allowing the substandard water to flow back to the raw water tank 1 through the EDI concentrate return pipe 84, thus achieving the return treatment of substandard water from the EDI influent. Finally, the ultrapure water processed by EDI module 8 enters ultrapure water tank 9 and is supplied to users by ultrapure water pump 91.

[0032] This system for preventing EDI module resin oxidation achieves automatic reflux treatment of substandard water by setting up a primary reflux pipe 62 and an EDI concentrate reflux pipe 84, thus preventing substandard water from entering the EDI module 8 and effectively preventing EDI resin oxidation. Simultaneously, the system further improves the stability and reliability of the system by adding a residual chlorine meter 81 and a pretreatment electric valve 82, enabling automatic monitoring and treatment of residual chlorine in the EDI influent. In addition, the system has advantages such as simple structure, convenient operation, and high degree of automation, effectively improving industrial water treatment efficiency and quality, reducing operating and maintenance costs, and has broad application prospects and market demand.

[0033] This invention provides a system for preventing the oxidation of EDI module resin. By adding a primary return pipe and an EDI concentrate return pipe, it achieves automatic return treatment of substandard water quality, preventing substandard water from entering the EDI module and thus effectively preventing the oxidation of the EDI resin. This system has advantages such as simple structure, convenient operation, and high degree of automation. It can improve the efficiency and quality of industrial water treatment, reduce operating and maintenance costs, and has broad application prospects and market demand.

[0034] The working principle and usage process of this utility model: After assembling each component of this solution in sequence, work according to the above implementation methods in sequence according to actual needs to complete all working steps.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A system for preventing oxidation of EDI module resin, characterized in that: The invention comprises a raw water tank (1), wherein the water outlet of the raw water tank (1) is connected in sequence to a quartz sand filter (21), an activated carbon filter (22) and a security filter (23) through a pipeline, the water outlet of the security filter (23) is connected to a high-pressure pump (4) through a pipeline, the output end of the high-pressure pump (4) is connected to a primary reverse osmosis component (51) through a pipeline, the output end of the primary reverse osmosis component (51) is connected to a primary RO water production tank (6) through a pipeline, and an inlet electric valve (61) is installed on the pipeline, a primary return pipe (62) is arranged at the front end of the inlet electric valve (61), the primary return pipe (62) is connected to the raw water tank (1), and a return water electric valve (63) is arranged on the primary return pipe (62).

2. A system for preventing EDI module resin oxidation according to claim 1, characterized in that: The water inlet and outlet pipes of the safety filter (23) are both connected and installed with a dosing device (3).

3. A system for preventing EDI module resin from oxidation according to claim 2, characterized in that: The water outlet of the primary RO water production tank (6) is connected to a safety filter (23) via a pipeline, and a dosing device (3) is provided on the pipeline.

4. A system for preventing EDI module resin from oxidation according to claim 3, characterized in that: The water outlet of the security filter (23) is connected to a secondary reverse osmosis component (52) via a pipeline, the secondary reverse osmosis component (52) is connected to a secondary RO water production tank (7) via a pipeline, the water outlet of the secondary RO water production tank (7) is connected to a discharge pipe (71), and the discharge pipe (71) is connected to an EDI module (8).

5. A system for preventing EDI module resin from oxidation according to claim 4, characterized in that: A residual chlorine meter (81) is installed in communication with the discharge pipe (71), a pretreatment electric valve (82) is provided on one side adjacent to the residual chlorine meter (81), the pretreatment electric valve (82) is connected to a pretreatment water tank (83) via a pipeline, and an EDI concentrated water return pipe (84) is provided in communication with the EDI module (8).

6. A system for preventing EDI module resin from oxidation according to claim 5, characterized in that: The raw water tank (1) is provided with a raw water inlet pipe (11), a secondary RO concentrated water return interface (12) and an EDI concentrated water return interface (13).

7. A system for preventing EDI module resin from oxidation according to claim 6, characterized in that: The EDI concentrated water return pipe (84) is connected to the EDI concentrated water return interface (13), and a secondary return pipe (53) is provided at the bottom of the secondary reverse osmosis component (52), and the secondary return pipe (53) is connected to the secondary RO concentrated water return interface (12).

8. A system for preventing EDI module resin from oxidation according to claim 5, characterized in that: The EDI module (8) is connected to an ultrapure water tank (9) via a pipeline, and the output end of the ultrapure water tank (9) is connected to an ultrapure water pump (91) via a pipeline.

9. A system for preventing EDI module resin from oxidation according to claim 7, characterized in that: The raw water tank (1), the quartz sand filter (21), the activated carbon filter (22), the first-stage reverse osmosis component (51), the first-stage RO water production tank (6), and the second-stage RO water production tank (7) are all provided with a sewage valve (24) at the bottom.

10. A system for preventing EDI module resin from oxidation according to claim 5, characterized in that: A high-pressure pump (4) is installed on the water inlet pipe of the secondary reverse osmosis component (52).

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