Ion chromatography leacheate separation device
By employing a dual-membrane structure and solution recycling design in the ion chromatography eluent separation device, the problems of high device cost and complex structure were solved, and low-cost and stable eluent generation was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-03-31
AI Technical Summary
Existing automated ion chromatography eluent generators are expensive and complex, making them difficult to promote and use in small and medium-sized laboratories.
An ion chromatography eluent separation device with a dual-membrane structure prevents gas from entering the reaction chamber by placing a cation exchange membrane between the anode chamber and the reaction chamber, and an anion exchange membrane between the cathode chamber and the reaction chamber. At the same time, the solution is recycled by using a liquid supply tank, a water supply tank, and an exhaust valve, simplifying the structure.
It reduced equipment costs, simplified the structure, improved the performance stability and reliability of the device, and eliminated the need for high-pressure degassing equipment.
Smart Images
Figure CN224057105U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of ion chromatography analysis, in particular to an ion chromatography eluent separation device. BACKGROUND
[0002] As an effective separation and analysis technology, the separation principle of ion chromatography mainly lies in that the eluent and the sample to be measured flow into a separation column filled with ion exchange resin, and the ions to be measured form different chromatographic zones and flow out of the separation column. However, in the operation, the eluent must be added regularly to adjust the working properties of the electrolyte, and the operation steps are complex.
[0003] The existing eluent automatic generation device adopts a single-membrane electrolysis principle, and a high-pressure degassing device must be used to discharge the hydrogen generated by electrolysis in the high-pressure area flow path to make the system usable. However, the high-pressure degassing device is expensive, which increases the cost of the entire generator device. At the same time, the complex structure design also leads to an increase in maintenance difficulty, which limits its popularization and use in small and medium-sized laboratories. Therefore, how to reduce the cost of the eluent automatic generation device while ensuring its performance stability has become a technical problem to be solved. CONTENT OF THE INVENTION
[0004] In order to reduce the cost of the equipment, the present application provides an ion chromatography eluent separation device.
[0005] The ion chromatography eluent separation device provided by the present application adopts the following technical scheme:
[0006] The ion chromatography eluent separation device comprises:
[0007] The protective box is internally provided with a liquid supply mechanism and a reaction mechanism, a partition plate is arranged between the liquid supply mechanism and the reaction mechanism, the liquid supply mechanism comprises a liquid supply tank arranged at the bottom of the protective box body and a water supply tank arranged in parallel with the liquid supply tank, the reaction mechanism is arranged above the liquid supply mechanism and comprises an anode chamber, a cathode chamber, and a reaction chamber arranged between the anode chamber and the cathode chamber, a cation exchange membrane is arranged between the reaction chamber and the anode chamber, an anion exchange membrane is arranged between the cathode chamber and the reaction chamber, and a U-shaped communication pipeline is arranged between the anode chamber and the cathode chamber, the water supply tank is connected in communication with one side of the reaction chamber through a water supply pipe, the other side of the reaction chamber is provided with a liquid discharge port, the liquid supply tank is connected in communication with the anode chamber through a liquid supply pipe, the liquid supply tank is connected in communication with the cathode chamber through a liquid return pipe, and an exhaust valve is arranged at the top of the liquid supply tank.
[0008] The control device comprises a control panel arranged on the top of the protection box, an anode plate and a cathode plate electrically connected with the control panel, the anode plate is arranged on one side close to the anode chamber and is electrically connected with the reaction component in the anode chamber, and the cathode plate is arranged on one side close to the cathode chamber and is electrically connected with the reaction component in the cathode chamber.
[0009] By adopting the above technical scheme, the cation exchange membrane and the anion exchange membrane are arranged between the anode chamber, the reaction chamber and the cathode chamber, so that the gas generated by electrolysis in the anode chamber and the cathode chamber cannot enter the reaction chamber, thereby avoiding the use of a high-pressure degassing device and reducing the equipment cost. Meanwhile, through the design of the liquid supply tank, the water supply tank and the exhaust valve, the circulation and utilization of the solution and the gas discharge are realized, and the device structure is further simplified. The ion chromatography eluent separation device with simple structure and low cost is realized.
[0010] Preferably, the reaction component is arranged as a titanium plate, and the titanium plate is provided with a plurality of through holes.
[0011] By adopting the above technical scheme, the plurality of through holes arranged on the titanium plate can increase the contact area of the titanium plate and the reaction solution, thereby improving the electrochemical reaction efficiency.
[0012] Preferably, the diameter of the through hole is 0.5-1mm, and the spacing between adjacent two through holes is 1-2mm.
[0013] By adopting the above technical scheme, the through hole with a diameter of 0.5-1mm is arranged on the titanium plate, and the spacing between adjacent two through holes is set to 1-2mm, which can significantly increase the contact area of the titanium plate and the reaction solution, thereby improving the electrolysis reaction efficiency. Meanwhile, under the premise of ensuring the structural strength, the design effectively promotes the ion transmission and the diffusion of the reactant, thereby further improving the overall performance of the device.
[0014] Preferably, a platinum wire is arranged around the titanium plate, and the titanium plate is provided with a clamping groove for fixing the platinum wire.
[0015] By adopting the above technical scheme, the platinum wire is arranged around the titanium plate, and the titanium plate is provided with a plurality of clamping grooves for fixing the platinum wire at the upper and lower ends, which further increases the contact area of the titanium plate and the reaction solution, thereby enhancing the electrolysis reaction efficiency. Meanwhile, the arrangement of the clamping groove effectively prevents the platinum wire from falling off, thereby ensuring the stability and reliability of the device.
[0016] Preferably, the reaction chamber is provided with a layer of anion exchange resin fiber and a layer of cation exchange resin fiber arranged side by side, the layer of cation exchange resin fiber is arranged opposite to the anion exchange membrane, and the layer of anion exchange resin fiber is arranged opposite to the cation exchange membrane.
[0017] By adopting the technical scheme, the anion exchange resin fiber layer is arranged opposite to the cation exchange membrane, which can effectively promote the exchange process of anions and improve the transmission efficiency of anions; the cation exchange resin fiber layer is arranged opposite to the anion exchange membrane, which can effectively promote the exchange process of cations and improve the transmission efficiency of cations; the combination of the two kinds of resin fiber layers makes the ion exchange reaction more sufficient, thereby improving the overall reaction rate and the generation efficiency of the eluent.
[0018] Preferably, the control device further comprises a water supply pump arranged on the water supply pipe and a liquid supply pump arranged on the liquid supply pipe, and the water supply pump and the liquid supply pump are electrically connected with the control panel.
[0019] By adopting the technical scheme, the water supply pump is arranged on the water supply pipe, and the water supply pump is electrically connected with the control panel, so that the flow of deionized water entering the reaction chamber can be adjusted according to actual needs, and the stability of the solution concentration in the reaction chamber is ensured; the liquid supply pump is arranged on the liquid supply pipe, and the liquid supply pump is electrically connected with the control panel, so that the flow of KOH aqueous solution entering the anode chamber can be accurately controlled, and the efficiency and stability of the electrolysis reaction in the anode chamber are further ensured; and the accurate control of the fluids in the water supply pipe and the liquid supply pipe is realized.
[0020] Preferably, the height of the liquid inlet of the liquid return pipe is higher than that of the liquid outlet of the liquid return pipe.
[0021] By adopting the technical scheme, the height of the liquid inlet of the liquid return pipe is higher than that of the liquid outlet of the liquid return pipe, so that the gravity can be used to promote the return of the liquid during the circulation of the liquid, the liquid can be smoothly returned from the cathode chamber to the liquid supply tank, and the accumulation or air blockage of the liquid in the liquid return pipe is avoided, thereby improving the stability and reliability of the operation of the device.
[0022] Preferably, the two ends of the U-shaped communication pipeline are respectively provided with sealing flanges, and the sealing flanges are sealingly connected with the inner walls of the anode chamber and the cathode chamber.
[0023] By adopting the technical scheme, the two ends of the U-shaped communication pipeline are provided with sealing flanges, and the sealing flanges are sealingly connected with the inner walls of the anode chamber and the cathode chamber, so that the leakage of the reaction solution can be effectively prevented, and the sealing performance of the device is ensured, thereby improving the reliability of the operation of the device.
[0024] Preferably, the thickness of the anion exchange resin fiber layer and the cation exchange resin fiber layer is 2-5mm.
[0025] By adopting the technical scheme, the thickness of the anion exchange resin fiber layer and the cation exchange resin fiber layer is set to 2-5mm, which can effectively increase the reaction contact area and promote the ion exchange efficiency, thereby improving the generation rate and purity of the eluent.
[0026] Preferably, the inner walls of the anode chamber and the cathode chamber are provided with an anti-corrosion coating, and the thickness of the anti-corrosion coating is 0.1-0.3mm.
[0027] By adopting the above technical solution, the inner walls of the anode chamber and the cathode chamber are provided with an anti-corrosion coating, which can effectively prevent the corrosion of corrosive substances generated during the electrolysis process on the inner walls of the chamber body, thereby prolonging the service life of the equipment. The thickness of the anti-corrosion coating is set to 0.1-0.3mm, which can ensure the anti-corrosion effect while avoiding the increase in cost and assembly difficulty caused by an excessively thick coating.
[0028] In summary, the present application has at least one of the following beneficial technical effects:
[0029] 1. The double membrane structure is adopted, a cation exchange membrane is arranged between the anode chamber and the reaction chamber, and an anion exchange membrane is arranged between the cathode chamber and the reaction chamber, which only allows ions to pass through while preventing gas from entering the reaction chamber, thereby effectively preventing the gas generated by the anode and the cathode from mixing into the eluent, so that an additional high-pressure degassing device is not required, the equipment cost is reduced, and the structure is simplified;
[0030] 2. The anion exchange resin fiber layer and the cation exchange resin fiber layer are arranged in the reaction chamber and opposite to the exchange membrane, which can significantly improve the ion exchange efficiency, enhance the reaction rate, and improve the stability and reliability of the eluent generation;
[0031] 3. Titanium plates with through holes are used as the electric connection mechanism in the anode chamber and the cathode chamber, and platinum wires are arranged around the titanium plates, which can increase the contact area with the reaction solution, improve the uniformity of the current distribution, optimize the electrolysis efficiency, and ensure the stability of the platinum wires through the clamping grooves, thereby prolonging the service life of the device. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 is a structural schematic diagram of an ion chromatography eluent separation device.
[0033] Figure 2 is a structural schematic diagram of a reaction member.
[0034] BRIEF DESCRIPTION OF DRAWINGS: 1, protection box; 11, partition; 2, liquid supply mechanism; 21, liquid supply tank; 211, liquid supply pipe; 212, liquid return pipe; 213, exhaust valve; 22, water supply tank; 221, water supply pipe; 3, reaction mechanism; 31, anode chamber; 32, cathode chamber; 33, reaction chamber; 331, liquid outlet; 332, anion exchange resin fiber layer; 333, cation exchange resin fiber layer; 34, cation exchange membrane; 35, anion exchange membrane; 36, communication pipeline; 4, control device; 41, control panel; 42, anode plate; 43, cathode plate; 44, reaction member; 441, titanium plate; 4411, through hole; 4412, clamping groove; 442, platinum wire; 45, water supply pump; 46, liquid supply pump. Detailed Implementation
[0035] The following is in conjunction with the appendix Figures 1-2 This application will be described in further detail.
[0036] This application discloses an ion chromatography eluent separation device. (Refer to...) Figure 1 The ion chromatography eluent separation device includes a protective box 1, a liquid supply mechanism 2, a reaction mechanism 3, and a control device 4. A partition 11 is installed between the liquid supply mechanism 2 and the reaction mechanism 3. The liquid supply mechanism 2 includes a liquid supply tank 21 and a water supply tank 22. The reaction mechanism 3 includes an anode chamber 31, a cathode chamber 32, and a reaction chamber 33. A cation exchange membrane 34 is installed between the anode chamber 31 and the reaction chamber 33, and an anion exchange membrane 35 is installed between the cathode chamber 32 and the reaction chamber 33. A U-shaped connecting pipe 36 is installed between the anode chamber 31 and the cathode chamber 32. The water supply tank 22 is connected to one side of the reaction chamber 33 via a water supply pipe 221, and a drain port 331 is provided on the other side of the reaction chamber 33. The liquid supply tank 21 is connected to the anode chamber 31 via a liquid supply pipe 211, and to the cathode chamber 32 via a return pipe 212. An exhaust valve 213 is installed on the top of the liquid supply tank 21. The control device 4 includes a control panel 41, an anode plate 42, and a cathode plate 43. The anode plate 42 is located near the anode chamber 31 and is electrically connected to the reaction element 44 inside the anode chamber 31. The cathode plate 43 is located near the cathode chamber 32 and is electrically connected to the reaction element 44 inside the cathode chamber 32. This design achieves effective gas isolation and solution recycling, reducing equipment costs and simplifying the structure.
[0037] Reference Figure 2 Specifically, both the anode chamber 31 and the cathode chamber 32 are equipped with a reaction element 44, which can be a titanium plate 441. The titanium plate 441 has several through holes 4411, each with a diameter of 0.5 to 1 mm, and the spacing between adjacent through holes 4411 is 1 to 2 mm. This design significantly increases the contact area between the titanium plate 441 and the reaction solution, thereby improving the electrolysis efficiency. Simultaneously, a platinum wire 442 is wound around the titanium plate 441, and a slot 4412 is provided on the titanium plate 441 for fixing the platinum wire 442. The slot 4412 effectively prevents the platinum wire 442 from falling off, ensuring the stability and reliability of the device. Alternatively, the reaction element 44 can also be a nickel plate or a plate made of other corrosion-resistant materials, which also has several through holes 4411 to increase the contact area.
[0038] Reference Figure 1Specifically, the reaction chamber 33 is provided with an anion exchange resin fiber layer 332 and a cation exchange resin fiber layer 333 arranged side by side, the cation exchange resin fiber layer 333 is arranged opposite to the anion exchange membrane 35, and the anion exchange resin fiber layer 332 is arranged opposite to the cation exchange membrane 34. The thickness of the anion exchange resin fiber layer 332 and the cation exchange resin fiber layer 333 is 2-5 mm. This design can effectively increase the reaction contact area and promote the ion exchange efficiency, thereby improving the eluent generation rate and purity. For example, the material of the anion exchange resin fiber layer 332 and the cation exchange resin fiber layer 333 can be polystyrene or polyacrylonitrile, which has good ion exchange performance and chemical stability.
[0039] Specifically, the two ends of the U-shaped communication pipe 36 are provided with sealing flanges, which are sealingly connected with the inner walls of the anode chamber 31 and the cathode chamber 32. This design can effectively prevent the leakage of the reaction solution and ensure the sealing performance of the device, thereby improving the reliability of the device operation. For example, the sealing flange can be made of rubber or silicone, which has good elasticity and can ensure the sealing effect.
[0040] Specifically, the inner walls of the anode chamber 31 and the cathode chamber 32 are provided with a corrosion-resistant coating, and the thickness of the corrosion-resistant coating is 0.1-0.3 mm. This design can effectively prevent the corrosion of the corrosive substances generated during the electrolysis process on the inner wall of the chamber body, thereby prolonging the service life of the equipment. For example, the corrosion-resistant coating can be a polytetrafluoroethylene or epoxy resin coating, which has excellent corrosion resistance and adhesion.
[0041] Specifically, the control device 4 further comprises a water supply pump 45 arranged on the water supply pipe 221 and a liquid supply pump 46 arranged on the liquid supply pipe 211, and the water supply pump 45 and the liquid supply pump 46 are electrically connected with the control panel 41. This design can adjust the flow of deionized water entering the reaction chamber 33 according to the actual demand, ensure the stability of the solution concentration in the reaction chamber 33, and accurately control the flow of KOH aqueous solution entering the anode chamber 31, thereby further ensuring the efficiency and stability of the electrolysis reaction in the anode chamber 31. For example, the water supply pump 45 and the liquid supply pump 46 can be centrifugal pumps or diaphragm pumps, which have the characteristics of simple structure and reliable operation.
[0042] Specifically, the liquid inlet of the liquid return pipe 212 is higher than the liquid outlet of the liquid return pipe 212. This design can utilize the gravity to promote the liquid return during the liquid circulation process, ensure the smooth return of the liquid from the cathode chamber 32 to the liquid supply tank 21, and avoid the accumulation or air blockage of the liquid in the liquid return pipe 212, thereby improving the stability and reliability of the device operation.
[0043] The implementation principle of the ion chromatography eluent separation device in the embodiment of the application is as follows: a double-membrane structure is adopted, a cation exchange membrane 34 is arranged between the anode chamber 31 and the reaction chamber 33, and an anion exchange membrane 35 is arranged between the cathode chamber 32 and the reaction chamber 33, only allowing ions to pass through and preventing gas from entering the reaction chamber 33, effectively avoiding the mixing of gas generated by the anode and the cathode into the eluent, so that an additional high-pressure degassing device is not needed, the equipment cost is reduced, and the structure is simplified.
[0044] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.
Claims
1. An ion chromatography eluent separation device, characterized by: The utility model provides a kind of protection box (1), which is internally provided with a liquid supply mechanism (2) and a reaction mechanism (3). A partition (11) is provided between the liquid supply mechanism (2) and the reaction mechanism (3). The liquid supply mechanism (2) includes a liquid supply tank (21) provided at the bottom of the protection box (1) and a water supply tank (22) provided side by side with the liquid supply tank (21). The reaction mechanism (3) is provided above the liquid supply mechanism (2) and includes an anode chamber (31), a cathode chamber (32), and a reaction chamber (33) provided between the anode chamber (31) and the cathode chamber (32). An anion exchange membrane (35) is provided between the cathode chamber (32) and the reaction chamber (33), a cation exchange membrane (34) is provided between the reaction chamber (33) and the anode chamber (31), and a U-shaped communication pipeline (36) is provided between the anode chamber (31) and the cathode chamber (32). The water supply tank (22) is connected to one side of the reaction chamber (33) through a water supply pipe (221), and the other side of the reaction chamber (33) is provided with a liquid outlet (331). The liquid supply tank (21) is connected to the anode chamber (31) through a liquid supply pipe (211), and is connected to the cathode chamber (32) through a liquid return pipe (212). An exhaust valve (213) is provided at the top of the liquid supply tank (21). The control device (4) includes a control panel (41) provided at the top of the protection box (1), an anode plate (42), and a cathode plate (43) electrically connected to the control panel (41). The anode plate (42) is provided near one side of the anode chamber (31) and is electrically connected to a reaction component (44) in the anode chamber (31). The cathode plate (43) is provided near one side of the cathode chamber (32) and is electrically connected to a reaction component (44) in the cathode chamber (32). The reaction component (44) is provided as a titanium plate (441) with a plurality of through holes (4411).
2. The ion chromatography eluent separation device of claim 1, wherein: The diameter of the through holes (4411) is 0.5-1mm, and the distance between two adjacent through holes (4411) is 1-2mm.
3. The ion chromatography eluent separation device of claim 2, wherein: A platinum wire (442) is wound around the titanium plate (441), and a clamping groove (4412) is provided on the titanium plate (441) for fixing the platinum wire (442).
4. The ion chromatography eluent separation device of claim 2, wherein: An anion exchange resin fiber layer (332) and a cation exchange resin fiber layer (333) are provided side by side in the reaction chamber (33). The cation exchange resin fiber layer (333) is provided opposite to the anion exchange membrane (35), and the anion exchange resin fiber layer (332) is provided opposite to the cation exchange membrane (34).
5. The ion chromatography eluent separation device of claim 1, wherein: The control device (4) further includes a water supply pump (45) provided on the water supply pipe (221) and a liquid supply pump (46) provided on the liquid supply pipe (211). The water supply pump (45) and the liquid supply pump (46) are electrically connected to the control panel (41).
6. The ion chromatography eluent separation device of claim 1, wherein: 7. The ion chromatography eluent separation device of claim 1, wherein: The liquid inlet of the liquid return pipe (212) is higher than the liquid outlet of the liquid return pipe (212).
8. The ion chromatography eluent separation device of claim 1, wherein: Two ends of the U-shaped communication pipe (36) are respectively provided with sealing flanges which are sealingly connected with inner walls of the anode chamber (31) and the cathode chamber (32).
9. The ion chromatography eluent separation device of claim 5, wherein: The thickness of the anion exchange resin fiber layer (332) and the cation exchange resin fiber layer (333) is 2-5mm.
10. The ion chromatography eluent separation device of claim 1, wherein: The inner walls of the anode chamber (31) and the cathode chamber (32) are provided with anticorrosion coatings, and the thickness of the anticorrosion coatings is 0.1-0.3mm.