A heated automated regeneration system for ion exchange
By introducing a heating device and a circulating regeneration system into the ion exchange system, the problem of high eluent consumption was solved, achieving more efficient ion exchange resin regeneration and lower energy consumption, and ensuring the uniformity and efficiency of the ion exchange reaction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO GRAPHENE INNOVATION CENT CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-30
Smart Images
Figure CN224422909U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of ion exchange column technology, and more specifically, relates to a heated automated recycling system for ion exchange. Background Technology
[0002] The automated adsorption column has specifications of DN50-600mm and a wall thickness of 4mm, with a filling volume of 1.2L. It is a heated, automated, circulating regeneration system for ion exchange and belongs to the category of ion exchange equipment. During normal use, the automated adsorption column feeds from the top and discharges from the bottom. As the ion exchange column is used for a longer period, the resin becomes saturated with anions and cations, resulting in a significant loss of its ion adsorption capacity. Therefore, when the amount of pretreated material passing through reaches a certain level or the discharge indicators meet certain requirements, periodic elution is necessary. After eluting and collecting the required anions and cations, regeneration can be performed to continue ion exchange and adsorption of the desired ions.
[0003] The eluent used in some specific ion exchange resins reacts slowly and incompletely at room temperature, requiring an appropriate increase in regeneration time, which increases the consumption of eluent. Utility Model Content
[0004] In view of the above-mentioned shortcomings of the prior art, this application provides a heated automated circulating regeneration system for ion exchange that can provide the specific ambient temperature required for the eluent, improve the utilization rate of the eluent, thereby reducing the amount of eluent used and improving the regeneration effect of the ion exchange resin.
[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows: a heatable automated circulating regeneration system for ion exchange. The system includes an automated adsorption column, an eluent heating tank, and a heat preservation device. The automated adsorption column is provided with an inlet end and an outlet end. One end of the inlet end is connected to a feed liquid conveying pipe, and the other end of the feed liquid conveying pipe is used for inputting cleaning liquid, pretreatment liquid, or eluent. The outlet end of the automated adsorption column is connected to a feed liquid output pipe for drawing out the cleaning liquid, pretreatment liquid, and eluent. After the eluent is drawn out, it is connected to the eluent heating tank through a circulation pipe, and the outlet of the eluent heating tank is connected to the inlet end of the automated adsorption column. The outer periphery of the automated adsorption column is covered with a jacket, and a heated liquid inlet pipe and a heated liquid outlet pipe are provided on the jacket. The heated liquid inlet pipe and the heated liquid outlet pipe are respectively connected to the outlet and inlet of the heat preservation device.
[0006] By adopting the above structure, this application, for the first time, heats the eluent entering the automated adsorption column by setting up a heating device in the eluent heating tank. The heated eluent reaches a suitable temperature, and a heat preservation device is used to heat and keep the automated adsorption column at the optimal elution temperature. In this way, when adding eluent, the optimal reaction temperature for ion exchange elution can be ensured. Generally, higher temperatures are beneficial to the kinetics of ion exchange, enhancing the ion exchange between the eluent and the resin, effectively improving the eluent utilization rate, reducing the amount of eluent used, and improving the elution effect of the ion exchange resin. Under room temperature conditions, more eluent may need to be introduced to ensure the reaction reaches the target degree, while heating can accelerate this process, thus reducing the amount of eluent used. In addition, the eluent of this application is recycled back into the eluent heating tank after exiting the column, thus allowing for recycling and further reducing the amount of eluent used, making its application more efficient. Moreover, the recycled eluent still has a certain temperature, and the energy consumption for reheating after entering the eluent heating tank is even lower.
[0007] Furthermore, the feed delivery pipeline is equipped with a metering pump and a pressure sensor, which can effectively and accurately control the flow rate and pressure of each feed liquid entering the automated adsorption column, thereby effectively regulating the reaction process.
[0008] Furthermore, the inlet end of the automated adsorption column is equipped with a PTFE pad distributor, and the outlet end is equipped with a PTFE filter plate. With this structure, since the automated adsorption column is cylindrical and its diameter is much larger than the feed pipe, the PTFE pad distributor allows the liquid entering the automated adsorption column to be more evenly distributed across the cross-section of the column, which is beneficial for a complete and uniform reaction. The distributor is a common commercially available product, and this application uses PTFE pad material for protection to prevent corrosion. As for the PTFE filter plate at the outlet end, considering that a very small amount of powder will inevitably be shed from the adsorbent resin material, the lower filter plate effectively prevents contamination of the discharged material, and the filter plate is cleaned regularly.
[0009] Furthermore, both the feed delivery pipe and the feed output pipe of the automated adsorption column are equipped with electrically controlled stainless steel PTFE-lined quick-connect ball valves. With this structure, since different feed pipes will enter the automated adsorption column during the use of the equipment, and different discharge pipes will also be used to discharge the liquid, the quick-connect ball valves can prevent cross-contamination. Moreover, the electrically controlled ball valves can change the flow direction of different liquids in the discharge pipe, and the PTFE lining prevents the quick-connect ball valves from being corroded.
[0010] Furthermore, the automated adsorption column is lined with PTFE (i.e., the inner surface of the automated adsorption column is coated with a PTFE layer), and a sealing gasket is provided at the liquid inlet end of the automated adsorption column. With this structure, since the pretreatment liquid and regeneration liquid used are strong acid and strong alkali liquids, the use of PTFE lining can prevent the pipe material from being corroded.
[0011] Furthermore, the inner wall of the eluent heating tank is made of stainless steel with a fluoropolymer lining, which provides resistance to acid and alkali corrosion.
[0012] Furthermore, the heating inlet pipe is located at the lower end of the length direction of the automated adsorption column, and the heating outlet pipe is located at the upper end of the length direction of the automated adsorption column. The heating medium circulates from the lower end to the upper end of the length direction of the automated adsorption column for heating. With this structure, the heating of the automated adsorption column can be achieved more uniformly.
[0013] Furthermore, the heating medium is water; water bath insulation can control the temperature very precisely compared to electric heating, and it also solves the problem of uneven temperature distribution inside the automated adsorption column caused by electric heating, thus meeting more demanding experimental environments.
[0014] Furthermore, the insulation device is also connected to a heating device, which is used to heat the medium in the insulation device. Specifically, the heating device can be connected to a tank for heating the medium in the insulation device via an external line. By continuously heating the medium, the heated medium is circulated between the insulation device and the outer layer of the automated adsorption column to achieve medium circulation, thereby stabilizing the medium at the ambient temperature required by different schemes. Attached Figure Description
[0015] Figure 1 A process flow diagram of a heatable automated recycling system for ion exchange provided in an embodiment of this utility model.
[0016] Figure 2 A schematic diagram of a heatable automated recycling system for ion exchange provided in an embodiment of this utility model.
[0017] As shown in the attached diagram: 1. Automated adsorption column, 101. Jacket, 102. Heated inlet pipe, 103. Heated outlet pipe, 104. PTFE material layer, 2. Eluent heating tank, 3. Insulation device, 4. Feed conveying pipe, 5. Feed output pipe, 6. Circulation pipe, 7. Metering pump, 8. Pressure sensor, 9. PTFE pad distributor, 10. PTFE filter screen, 11. Electrically controlled stainless steel PTFE-lined quick-connect ball valve. Detailed Implementation
[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely preferred embodiments, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this invention.
[0019] Furthermore, it should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or it may be fixed via another intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or it may be fixed via another intermediate component. When a component is considered to be "set on" another component, it can be set directly on the other component or it may be fixed via another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only; unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0020] As attached Figure 2The figure shows a heated automated circulating regeneration system for ion exchange according to this application. The system includes an automated adsorption column 1, an eluent heating tank 2, and a heat preservation device 3. The automated adsorption column 1 is provided with an inlet end and an outlet end (an automated adsorption column is a conventional structure in this field, generally a cylindrical structure with inlets equipped with filters and valves at the top and bottom; as shown in Figure 2, the upper part is the inlet end and the lower part is the outlet end). One end of the feed liquid conveying pipe 4 is connected to the inlet end, and the other end of the feed liquid conveying pipe 4 is used for inputting cleaning liquid, pretreatment liquid, or eluent (wherein the cleaning liquid and pretreatment liquid can be input using a delivery pump). The outlet end of the automated adsorption column 1 is connected to a feed liquid output pipe 5 for drawing out the cleaning liquid, pretreatment liquid, and eluent. After the eluent is drawn out, it is connected to the eluent heating tank 2 through a circulation pipe 6, and the outlet of the eluent heating tank 2 is connected to the inlet end of the automated adsorption column 1 (so that the eluent heated by the eluent heating tank 2 flows into the automated adsorption column). 1. The outer periphery of the automated adsorption column 1 is covered by a jacket 101 (i.e., the jacket covers the outside of the column and forms a space between the column to accommodate the heating medium). The jacket 101 is provided with a heating inlet pipe 102 and a heating outlet pipe 103. The heating inlet pipe 102 and the heating outlet pipe 103 are respectively connected to the outlet and inlet of the heat preservation device 3. This enables the heated medium to continuously and uniformly heat the automated adsorption column. Specifically, the feed inlet side of the liquid conveying pipeline 4 described in this application... Three parallel branch pipes can be set up for introducing the cleaning solution, pretreatment solution and eluent respectively. The branch pipe for introducing the eluent is directly connected to the eluent heating tank, and the heated eluent is introduced into the automated adsorption column. The outlet side of the feed liquid output pipe 5 of this application is provided with three parallel branch pipes for collecting and drawing out the cleaning solution, pretreatment solution and eluent respectively. The eluent is drawn out and directly connected to the circulation pipe and then recirculated into the eluent heating tank to achieve the purpose of recycling and reduce the consumption of eluent.
[0021] By adopting the above structure, this application, for the first time, heats the eluent entering the automated adsorption column by setting up a heating device in the eluent heating tank. The heated eluent reaches a suitable temperature, and a heat preservation device is used to heat and keep the automated adsorption column at the optimal elution temperature. In this way, when adding eluent, the optimal reaction temperature for ion exchange elution can be ensured. Generally, higher temperatures are beneficial to the kinetics of ion exchange, enhancing the ion exchange between the eluent and the resin, effectively improving the eluent utilization rate, reducing the amount of eluent used, and improving the elution effect of the ion exchange resin. Under room temperature conditions, more eluent may need to be introduced to ensure the reaction reaches the target degree, while heating can accelerate this process, thus reducing the amount of eluent used. In addition, the eluent of this application is recycled back into the eluent heating tank after exiting the column, thus allowing for recycling and further reducing the amount of eluent used, making its application more efficient. Moreover, the recycled eluent still has a certain temperature, and the energy consumption for reheating after entering the eluent heating tank is even lower.
[0022] As attached Figure 2 As shown, the liquid conveying pipeline 4 described in this application is equipped with a metering pump 7 and a pressure sensor 8, which can effectively and accurately control the flow rate and pressure of each liquid entering the automated adsorption column, so as to effectively regulate the reaction process; specifically, the metering pump 7 can be a ceramic metering pump, which is located at the front end of the medium flow, and the pressure sensor is located at the rear end of the ceramic metering pump. The medium first passes through the metering pump and then through the pressure sensor.
[0023] As an example, such as Figure 2 As shown, the automated adsorption column 1 described in this application is equipped with a PTFE pad distributor 9 at its inlet end (located at the tail end of the feed liquid conveying pipeline, the medium passes through the PTFE pad distributor 9 before entering the automated adsorption column), and a PTFE filter screen 10 at its outlet end (from the tail end of the automated adsorption column, the medium passes through the PTFE filter screen 10 for filtration before entering the feed liquid output pipeline); specifically, the automated adsorption column 1 is a flat end cap with a built-in PTFE pad distributor 9 at the upper end and a built-in filter screen 10 at the lower end; using this structure, since the automated adsorption column is... The cylindrical shape, with a diameter much larger than that of the feed pipe, allows the liquid entering the inlet of the automated adsorption column 1 to be more evenly distributed across the cross-section of the column through the PTFE gasket distributor 9. This promotes a more complete and uniform reaction. The distributor is a common commercially available product, and this application uses PTFE gasket material for protection to prevent corrosion. As for the PTFE filter screen at the outlet, considering that a very small amount of powder will inevitably be shed from the adsorbent resin material, the lower filter screen can effectively prevent the discharge from being contaminated, and the filter screen is cleaned regularly.
[0024] As an example, such as Figure 2As shown, the automated adsorption column 1 described in this application is equipped with electrically controlled stainless steel PTFE-lined quick-connect ball valves 11 on both the liquid delivery pipe 4 and the liquid output pipe 5 connected to it. Specifically, the electrically controlled stainless steel PTFE-lined quick-connect ball valve 11 can be located at the intersection of different media distribution pipelines in the liquid delivery pipe 4 or the liquid output pipe 5; for example, at the intersection of parallel branch pipes for the introduction or exit of cleaning liquid, pretreatment liquid, and cleaning liquid. With this structure, since different feed pipes will enter the automated adsorption column during the use of the equipment, and different discharge pipes will also be required, cross-contamination can be prevented by using the quick-connect ball valve. Moreover, the electrically controlled ball valve can change the flow direction of different liquids in the discharge pipe, and the PTFE lining prevents the quick-connect ball valve from being corroded.
[0025] As an example, the automated adsorption column 1 described in this application is lined with PTFE (i.e., the inner surface of the automated adsorption column 1 is coated with a PTFE layer or is a PTFE material layer 104), and a sealing gasket is provided at the liquid inlet end of the upper end of the automated adsorption column (the sealing point here is the liquid inlet at the upper end of the automated adsorption column). With this structure, since the pretreatment liquid, regeneration liquid, etc., used are strong acid and strong alkali liquids, the use of PTFE lining can prevent the pipe from being corroded.
[0026] As an example, the inner wall of the eluent heating tank 2 described in this application is made of stainless steel with a fluoropolymer lining, which can resist acid and alkali corrosion.
[0027] As an example, such as Figure 2 As shown, the heating inlet pipe 102 described in this application is located at the lower end of the length direction of the automated adsorption column 1, and the heating outlet pipe 103 is located at the upper end of the length direction of the automated adsorption column 1. The heating medium circulates from the lower end to the upper end of the length direction of the automated adsorption column 1. With this structure, the heating of the automated adsorption column can be achieved more uniformly.
[0028] As an example, the heating medium described in this application is water; water bath insulation can control the temperature very precisely compared to electric heating, and also solves the problem of uneven temperature distribution inside the automated adsorption column caused by electric heating, thus meeting more demanding experimental environments.
[0029] As an example, the insulation device 3 described in this application is also connected to a heating device, which is used to heat the medium in the insulation device 3. Specifically, the insulation device 3 can be a hollow sandwich structure with insulation function. The heating device can be connected to a tank for heating the medium in the insulation device through an external line. By continuously heating the medium, the heated medium is circulated between the insulation device and the sandwich layer around the outer periphery of the automated adsorption column to achieve medium circulation, thereby stabilizing the medium at the ambient temperature required by different schemes. The heating device is not shown in the attached drawings. It can be electric heating, boiler heating, or other heating sources that can achieve medium heating.
[0030] The above-disclosed application discloses a heatable automated recycling system for ion exchange, such as... Figure 1 As shown, its specific usage process includes the following steps:
[0031] Step 1: The pretreatment solution is fed into the automated adsorption column 1 through metering pump 7 for ion exchange adsorption. The adsorbed solution is collected at the solution outlet pipe at the bottom of the automated adsorption column 1.
[0032] Step 2: After the adsorption operation is completed, clean water is introduced into the automated adsorption column 1 through metering pump 7 for a post-adsorption cleaning process to remove residual pretreatment liquid. The cleaned water is collected at the material output pipe 5 at the lower end of the automated adsorption column 1.
[0033] Step 3: After the cleaning operation is completed, the preheated eluent is pumped into the automated adsorption column 1 through the eluent inlet for elution. The eluted eluent is then circulated back to the eluent heating tank 2 through the eluent circulation pipe 6 of the material output pipe 5 at the lower end of the automated adsorption column 1 for heating and recycling.
[0034] Step 4: After the elution operation is completed, clean water is introduced into the automated adsorption column 1 through metering pump 7 for the post-elution cleaning process to remove residual eluent. The cleaning water is collected at the cleaning liquid outlet at the bottom of the automated adsorption column 1.
[0035] All processes described can be paused and process parameters modified via the control box, and additional processes can be freely added.
[0036] It should be noted that in the specific implementation of this application, the automated adsorption column 1 can be made of SUS304 stainless steel, lined with PTFE, and all sealing gaskets used are made of PTFE.
[0037] As an example, the main body of the automated adsorption column 1 described in this application can be a cylinder with a volume of 1.2L, with a heat-insulating jacket, and can be used for all common adsorbent resin materials.
[0038] The infusion pump uses one precision ceramic metering pump and a 7-frequency variable frequency plunger pump, with a flow rate of 0.1-30 L / h; all piping used is PTFE tubing with quick-clamp connections. The valve body is an electric stainless steel PTFE-lined quick-release ball valve.
[0039] The control box consists of at least a display screen, PLC, frequency converter, and enclosure. The display screen shows the process status and parameters, including at least: flow rate, total flow rate, pressure, and time. Pressure sensor 5 can be set with an upper pressure limit; it automatically stops working when overpressure is exceeded, and features a safety interlock.
[0040] Both the eluent heating tank 2 and the heat preservation device 3 of this application are equipped with thermometers and safety alarm devices; the medium conveying pipelines of this application can also be independently controlled by valves to realize the independent opening and closing of each pipeline.
[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.
Claims
1. A heatable, automated, cyclic regeneration system for ion exchange, characterized in that: The system structure includes an automated adsorption column (1), an eluent heating tank (2), and a heat preservation device (3); the automated adsorption column (1) is provided with an inlet end and an outlet end; the inlet end is connected to one end of a feed liquid conveying pipe (4), and the other end of the feed liquid conveying pipe (4) is used for input of cleaning liquid, pretreatment liquid, or eluent; the outlet end of the automated adsorption column (1) is connected to a feed liquid output pipe (5), which is used for the extraction of cleaning liquid, pretreatment liquid, and eluent, and the eluent is extracted after extraction. The eluent heating tank (2) is connected to the circulating pipe (6), and the outlet of the eluent heating tank (2) is connected to the inlet of the automated adsorption column (1). The outer periphery of the automated adsorption column (1) is covered with a jacket (101), and a heating inlet pipe (102) and a heating outlet pipe (103) are provided on the jacket (101). The heating inlet pipe (102) and the heating outlet pipe (103) are respectively connected to the outlet and inlet of the heat preservation device (3).
2. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The liquid conveying pipeline (4) is equipped with a metering pump (7) and a pressure sensor (8).
3. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The automated adsorption column (1) is equipped with a PTFE pad distributor (9) at the inlet end and a PTFE filter screen (10) at the outlet end.
4. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The automated adsorption column (1) is equipped with an electrically controlled stainless steel PTFE-lined quick-release ball valve (11) on both the liquid delivery pipe (4) and the liquid output pipe (5).
5. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The automated adsorption column (1) is lined with tetrafluoroethylene.
6. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The inner wall of the eluent heating tank (2) is made of stainless steel with a fluoropolymer lining.
7. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The heating inlet pipe (102) is located at the lower end of the length direction of the automated adsorption column (1), and the heating outlet pipe (103) is located at the upper end of the length direction of the automated adsorption column (1). The heating medium is circulated from the lower end of the length direction of the automated adsorption column (1) to the upper end for heating.
8. The heatable automated regeneration system for ion exchange according to claim 7, characterized in that: The heating medium is water.
9. The heatable automated regeneration system for ion exchange according to claim 1, characterized in that: The heat preservation device (3) is also connected to a heating device, which is used to heat the medium in the heat preservation device (3).