Ion exchange column replacement cleaning system and method

Abstract

The present invention provides an ion exchange column replacement cleaning system, comprising an ion exchange module, a solution storage module, a pure water storage module, an acid-base storage module, a delivery pump, a solution recovery module, a waste liquid recovery module and a gas station; the ion exchange module comprises an ion exchange column, a liquid inlet and a liquid outlet, and the ion exchange column comprises a column body and a resin arranged in the column body. The present invention performs multiple water washing, alkali washing or acid washing on the ion exchange column through the pure water storage module, the acid-base storage module and the like, and at the same time, through the setting of the gas station, the waste liquid after water washing and alkali washing or acid washing can be replaced by air, so as to more thoroughly remove the waste liquid, avoid the need for a large amount of water for multiple water washings, etc., resulting in reduced cleaning efficiency and waste of water resources, improve the cleaning quality of the ion exchange module, and thus improve the regeneration quality of the ion exchange module.

Description

Technical Field

[0001] The invention relates to the technical field of ion exchange columns, and in particular to an ion exchange column replacement and cleaning system and method. Background Art

[0002] Ion exchange column is a tool used to separate and purify compounds. Resin-type ion exchange column selectively adsorbs and releases ions in solution through the resin filled in the column. Resin is usually a tiny particle with high exchange capacity, which can be made of organic polymer materials (such as styrene, divinylbenzene, etc.), and has functional groups on the surface that can exchange with ions in solution (such as sulfonic acid group, amino group, etc.). After a long period of exchange, high-valent metal ions and various high-molecular organic substances will generate insoluble sediments and deposit inside the resin, thereby blocking the exchange channel of ions. Replacing ion exchange columns is troublesome and not economical, so resin regeneration is currently the main means.

[0003] In the prior art, ion exchange columns are usually cleaned by water washing, alkali washing or acid washing. However, the cleaning is not thorough, a large amount of water is consumed, resulting in a waste of water resources, and the regeneration efficiency is low, which requires further improvement. Summary of the invention

[0004] The purpose of the present invention is to provide an ion exchange column replacement cleaning solution with high cleaning efficiency and good cleaning and regeneration effect in view of the shortcomings of the above-mentioned background technology.

[0005] In order to achieve the above-mentioned object, the present invention provides an ion exchange column replacement cleaning system, including an ion exchange module, a solution storage module, a pure water storage module, an acid and alkali storage module, a delivery pump, a solution recovery module, a waste liquid recovery module and a gas station;

[0006] The ion exchange module comprises an ion exchange column, a liquid inlet and a liquid outlet, the ion exchange column comprises a column body and a resin arranged in the column body, the liquid inlet and the liquid outlet are respectively located at two ends of the ion exchange column; the liquid inlet is connected to the delivery pump through a first pipeline, the solution storage module, the pure water storage module, and the acid-base storage module are respectively connected to the delivery pump through a second pipeline, a third pipeline, and a fourth pipeline, and control valves are arranged on the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline;

[0007] The liquid outlet is connected to the solution recovery module via a fifth pipeline, and a control valve is also provided on the fifth pipeline;

[0008] The gas station is connected to the fifth pipeline via a sixth pipeline, and a control valve is also provided on the sixth pipeline;

[0009] The waste liquid recovery module is connected to the liquid inlet via a seventh pipeline, and a control valve is also provided on the seventh pipeline.

[0010] Furthermore, the acid-base storage module is used to store acid solution or alkali solution.

[0011] Furthermore, the gas station is provided with an air pump, and the air pump is used to transport air or other gases.

[0012] Furthermore, when the gas station is turned on, the control valve of the fifth pipeline is closed, and the control valve of the first pipeline is closed.

[0013] Furthermore, the seventh pipeline is provided with a plurality of branches, and each branch is independently provided with a control valve, so that the waste liquid after the pure water cleaning and the waste liquid after the acid or alkali cleaning are respectively recovered through different containers.

[0014] Furthermore, the waste liquid recovered by the waste liquid recovery module is further processed to obtain pure water, and is transported to the pure water storage module.

[0015] Furthermore, a flow controller is also provided on the first pipeline, and the flow controller is used to control the flow of the liquid introduced into the ion exchange module.

[0016] Furthermore, the ion exchange module is provided with a sensor, and the sensor is used to monitor the pH value and conductivity of the ion exchange column.

[0017] Furthermore, the ion exchange columns are arranged in multiple groups in parallel.

[0018] The present invention also provides an ion exchange column replacement cleaning method, which uses the ion exchange column replacement cleaning system as described above, and includes the following steps:

[0019] S1, after the solution ion exchange is completed, the control valves on the fifth pipeline and the second pipeline are closed, the control valve on the third pipeline is opened, and the pure water is delivered to the ion exchange column by the delivery pump to complete the water washing;

[0020] S2, close the control valves on the first pipeline and the third pipeline, open the control valves on the sixth pipeline and the seventh pipeline, and the gas station supplies gas to replace the waste liquid inside the ion exchange column, and the waste liquid is discharged into the waste liquid recovery module;

[0021] S3, close the control valves on the sixth pipeline and the seventh pipeline, open the control valves on the first pipeline and the fourth pipeline, and deliver the alkaline solution or acid solution to the ion exchange column through the delivery pump to complete the alkaline washing or acid washing;

[0022] S4, close the control valves on the first pipeline and the third pipeline, open the control valves on the sixth pipeline and the seventh pipeline, and the gas station supplies gas to replace the waste liquid inside the ion exchange column, and the waste liquid is discharged into the waste liquid recovery module;

[0023] S5, close the control valves on the sixth pipeline and the seventh pipeline, open the control valves on the first pipeline and the third pipeline, and deliver pure water to the ion exchange column through the delivery pump to complete water washing;

[0024] S6, repeat S4.

[0025] The above scheme of the present invention has the following beneficial effects:

[0026] The ion exchange column replacement cleaning system and method provided by the present invention performs multiple water washing, alkali washing or acid washing on the ion exchange column through a pure water storage module, an acid-base storage module, etc., and at the same time, through the setting of a gas station, the waste liquid after water washing, alkali washing or acid washing can be replaced by air, so that the waste liquid is more thoroughly discharged, avoiding the need for multiple water washings with a large amount of water, etc., which leads to reduced cleaning efficiency and waste of water resources, thereby improving the cleaning quality of the ion exchange module, thereby improving the regeneration quality of the ion exchange module;

[0027] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the waste liquid recovery module branch of the present invention;

[0030] Figure 3 It is a schematic diagram of the association between the waste liquid recovery module and the pure water storage module of the present invention.

[0031] [Description of Reference Numerals]

[0032] 1-ion exchange module; 2-solution storage module; 3-pure water storage module; 4-alkali solution storage module; 5-delivery pump; 6-solution recovery module; 7-waste liquid recovery module; 8-liquid inlet; 9-liquid outlet; 10-first pipeline; 11-second pipeline; 12-third pipeline; 13-fourth pipeline; 14-fifth pipeline; 15-gas station; 16-sixth pipeline; 17-seventh pipeline; 18-flow controller. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 1 As shown, an embodiment of the present invention provides an ion exchange column replacement cleaning system, including an ion exchange module 1, a solution storage module 2, a pure water storage module 3, an alkali solution storage module 4, a delivery pump, a solution recovery module 6 and a waste liquid recovery module 7. Among them, the ion exchange module 1 includes an ion exchange column, and the ion exchange column includes a column and a resin. The column can be made of corrosion-resistant materials such as stainless steel, glass, and plastic. The resin is a tiny particle with a high exchange capacity and can be made of an organic polymer material (such as styrene, divinylbenzene, etc.), and the surface has functional groups (such as sulfonic acid groups, amino groups, etc.) that can exchange with ions in the solution. The ion exchange module also includes a liquid inlet 8 and a liquid outlet 9. The liquid inlet 8 is used for the solution to be exchanged to enter the column, and the liquid outlet 9 is used to discharge the solution that has completed the ion exchange from the column.

[0037] On one side of the liquid inlet 8, the ion exchange module 1 is connected to the delivery pump 5 through the first pipeline 10, and the solution storage module 2, the pure water storage module 3, and the alkali solution storage module 4 are connected to the delivery pump 5 through the second pipeline 11, the third pipeline 12, and the fourth pipeline 13, respectively. Therefore, the solution to be exchanged can be delivered to the ion exchange module 1, or the pure water can be delivered to the ion exchange module 1 for water washing, or the alkali solution can be delivered to the ion exchange module 1 for alkali washing by relying on the action of the delivery pump 5. Among them, the second pipeline 11, the third pipeline 12, and the fourth pipeline 13 can be delivered respectively through the corresponding delivery pump 5, or can be collected into the same pipeline and delivered through a delivery pump 5. Of course, the second pipeline 11, the third pipeline 12, and the fourth pipeline 13 are all provided with control valves, and the corresponding pipelines are switched on and off by the control valves.

[0038] On one side of the liquid outlet 9 of the ion exchange module 1, the ion exchange module 1 is connected to the solution recovery module 6 through the fifth pipeline 14 to recover the exchanged solution for subsequent transfer or use. A control valve is also provided on the fifth pipeline 14. When water washing is required after the solution is collected and alkaline washing is required after the water washing is completed, the control valve on the fifth pipeline 14 is in a closed state so that pure water or alkaline solution will not enter the solution recovery module 6 after passing through the ion exchange module 1, so as to avoid affecting the concentration and chemical properties of the recovered solution.

[0039] For the ion exchange module 1 in this embodiment, the advantage of using resin is that the exchange capacity is strong and a large amount of liquid can be quickly processed. However, the resin will be saturated after a period of use and needs to be regenerated by a chemical solution to restore it to its original state (regeneration). Therefore, the resin is repeatedly cleaned by the scheme of this embodiment, including water washing, alkali washing, etc., to clean the acidic solution remaining in the column and restore the resin to its original state. In actual application, it is difficult to completely clean the solution remaining inside the column with pure water, and a large amount of pure water is required for multiple cleanings, which consumes too much pure water.

[0040] Based on this, in this embodiment, a gas station 15 is also provided, and the gas station 15 is connected to the fifth pipeline 14 through the sixth pipeline 16. An air pump is provided inside the gas station 15, and a control valve is also provided on the sixth pipeline 16. Correspondingly, the waste liquid recovery module 7 is connected to the liquid inlet 8 of the ion exchange module 1 through the seventh pipeline 17, and a control valve is also provided on the seventh pipeline 17. In addition, a control valve is also provided on the first pipeline 10, and the seventh pipeline 17 and the first pipeline 10 can be independent branches, or they can share a section of the pipeline.

[0041] Among them, the air pump inside the gas station 15 can reversely supply air to the ion exchange module 1, that is, the air can enter the ion exchange module 1 along the sixth pipeline 16 and the liquid outlet 9, and the residual solution in the ion exchange module 1 is replaced (also regarded as blown away) by the action of air pressure, so that the solution enters the waste liquid recovery module 7 in the reverse direction through the liquid inlet 8 and the seventh pipeline 17, thereby cleaning the ion exchange module 1 more thoroughly and avoiding the inefficiency and large waste of water resources caused by multiple water washings.

[0042] It should be noted that reverse air replacement can be carried out through the gas station 15 after each water washing and alkaline washing, so that the remaining waste liquid after washing can be emptied through air replacement. After testing, it was found that the resin can be regenerated by two water washings and one alkaline washing, that is, water washing-alkaline washing-water washing and air replacement each time, so that the ion exchange process can be carried out again later.

[0043] It should be noted that when air replacement is performed, the control valve of the fifth pipeline 14 is also closed to prevent gas from entering the solution storage module 2 and carrying part of the waste liquid into the solution storage module 2. At the same time, the control valve on the first pipeline 10 is also closed to prevent the replaced waste liquid from entering the first pipeline 10 and then entering the second pipeline 11, the third pipeline 12, the fourth pipeline 13, etc.

[0044] At the same time Figure 2 As shown, as a preferred embodiment, the seventh pipeline 17 in this embodiment can also be provided with multiple branches, and each branch is independently provided with a control valve, so that the waste liquid after pure water washing and the waste liquid after alkali liquid washing are respectively recovered through different containers, so as to better classify and process. For example, the waste liquid after water washing can be evaporated to obtain pure water again, and then transported to the pure water storage module 3 to further supplement the amount used for water washing, so as to achieve the purpose of recycling. Figure 3 shown.

[0045] As a preferred embodiment, in this embodiment, a flow controller 18 is also provided on the first pipeline 10, and the flow controller 18 can better control the flow of the solution to be exchanged, pure water, alkali solution, etc. introduced into the ion exchange module 1, so as to achieve a better effect of ion exchange or cleaning. In addition, the ion exchange module 1 can also be further provided with a sensor to monitor the pH value and conductivity, etc., so as to judge the working state of the ion exchange module 1 in real time, and clean it in time to prevent the efficiency from being reduced due to resin saturation.

[0046] It should be noted that the ion exchange module 1 in this embodiment can also be replaced by ion exchange of alkaline solution, so after the exchange, it can be pickled with acid solution, or the ion exchange module needs to be alkali washed and pickled at the same time, and replaced by the gas station after each cleaning to achieve better cleaning effect. In addition, the columns in the ion exchange module 1 can also be set in multiple groups and arranged in parallel to perform ion exchange through multiple groups at the same time, further improving efficiency. Of course, the branches of each group can also be set with control valves for opening and closing control.

[0047] To sum up, the ion exchange column replacement cleaning system provided in this embodiment, through the setting of the air station 15, can allow the waste liquid after water washing and alkaline washing to be replaced by air, so as to more thoroughly remove the waste liquid, avoid the need for multiple water washings with a large amount of water, etc., which leads to reduced cleaning efficiency and waste of water resources, thereby improving the cleaning quality of the ion transfer module 1, thereby improving the regeneration quality of the ion exchange module.

[0048] Based on the same inventive concept, the present embodiment also provides an ion exchange column replacement cleaning method, which adopts the aforementioned water washing-alkaline washing-water washing, or water washing-alkaline washing-water washing-acid washing-water washing method, and air replacement is performed after each cleaning. The specific details and friendly effects are as described above and will not be repeated here.

[0049] The ion exchange column replacement cleaning system and cleaning method provided in this embodiment are applicable to the cleaning of resin-type ion exchange columns that need to replace various cations or anions, and have a wide range of applications.

[0050] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An ion exchange column replacement cleaning system, characterized in that: It includes an ion exchange module, a solution storage module, a pure water storage module, an acid-base storage module, a delivery pump, a solution recovery module, a waste liquid recovery module and a gas station; The ion exchange module comprises an ion exchange column, a liquid inlet and a liquid outlet, the ion exchange column comprises a column body and a resin arranged in the column body, the liquid inlet and the liquid outlet are respectively located at two ends of the ion exchange column; the liquid inlet is connected to the delivery pump through a first pipeline, the solution storage module, the pure water storage module, and the acid-base storage module are respectively connected to the delivery pump through a second pipeline, a third pipeline, and a fourth pipeline, and control valves are arranged on the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline; The liquid outlet is connected to the solution recovery module via a fifth pipeline, and a control valve is also provided on the fifth pipeline; The gas station is connected to the fifth pipeline via a sixth pipeline, and a control valve is also provided on the sixth pipeline; The waste liquid recovery module is connected to the liquid inlet via a seventh pipeline, and a control valve is also provided on the seventh pipeline.

2. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The acid-base storage module is used to store acid solution or alkali solution.

3. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The gas station is provided with an air pump, and the air pump is used to transport air or other gases.

4. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: When the gas station is turned on, the control valve of the fifth pipeline is closed, and the control valve of the first pipeline is closed.

5. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The seventh pipeline is provided with a plurality of branches, and each branch is independently provided with a control valve, so that the waste liquid after the pure water cleaning and the waste liquid after the acid solution or the alkali solution cleaning are respectively recovered through different containers.

6. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The waste liquid recovered by the waste liquid recovery module is further processed to obtain pure water, and then transported to the pure water storage module.

7. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The first pipeline is also provided with a flow controller, and the flow controller is used to control the flow of the liquid introduced into the ion exchange module.

8. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The ion exchange module is provided with a sensor, and the sensor is used to monitor the pH value and conductivity of the ion exchange column.

9. The ion exchange column replacement and cleaning system according to claim 1, characterized in that: The ion exchange columns are arranged in multiple groups in parallel.

10. An ion exchange column replacement cleaning method, using the ion exchange column replacement cleaning system according to any one of claims 1 to 9, characterized in that: The steps include: S1, after the solution ion exchange is completed, the control valves on the fifth pipeline and the second pipeline are closed, the control valve on the third pipeline is opened, and the pure water is delivered to the ion exchange column by the delivery pump to complete the water washing; S2, close the control valves on the first pipeline and the third pipeline, open the control valves on the sixth pipeline and the seventh pipeline, and the gas station supplies gas to replace the waste liquid inside the ion exchange column, and the waste liquid is discharged into the waste liquid recovery module; S3, close the control valves on the sixth pipeline and the seventh pipeline, open the control valves on the first pipeline and the fourth pipeline, and deliver the alkaline solution or acid solution to the ion exchange column through the delivery pump to complete the alkaline washing or acid washing; S4, close the control valves on the first pipeline and the third pipeline, open the control valves on the sixth pipeline and the seventh pipeline, and the gas station supplies gas to replace the waste liquid inside the ion exchange column, and the waste liquid is discharged into the waste liquid recovery module; S5, close the control valves on the sixth pipeline and the seventh pipeline, open the control valves on the first pipeline and the third pipeline, and deliver pure water to the ion exchange column through the delivery pump to complete water washing; S6, repeat S4.

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