Ion chromatography analysis system

Abstract

The utility model provides an ion chromatography analysis system which is characterized in that an ion chromatography suppressor comprises a first regeneration chamber, a first regeneration inlet, a first regeneration outlet, a suppression chamber, a second regeneration chamber, a second regeneration inlet and a second regeneration outlet, and a first ion exchange membrane is arranged between the first regeneration chamber and the suppression chamber; a second ion exchange membrane is arranged between the second regeneration chamber and the inhibition chamber, the first regeneration inlet and the second regeneration outlet are respectively communicated with the first regeneration chamber, and the second regeneration inlet and the second regeneration outlet are respectively communicated with the second regeneration chamber; the outlet of the suppression chamber, the conductance cell and the shunt constant-current device are connected in sequence; the shunt constant-current device is connected with the first regeneration inlet and the second regeneration inlet respectively, so that regenerated liquid uniformly flows to the first regeneration inlet and the second regeneration inlet respectively. According to the ion chromatographic analysis system disclosed by the embodiment of the utility model, the pressure difference of the ion exchange membrane can be reduced, the service life is prolonged, and the electrolysis efficiency and the inhibition effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ion chromatography analysis, in particular to an ion chromatography analysis system. Background Art

[0002] Ion chromatography is mainly used for the analysis of environmental samples, including anions and cations in surface water, drinking water, rainwater, domestic sewage and industrial wastewater, acid precipitation and atmospheric particulate matter, as well as the analysis of trace impurities in water and reagents related to the microelectronics industry. Suppressors play a very important role in the separation and detection of ion chromatographs.

[0003] In the related technology, the ion chromatography suppressor uses electrodes to electrolyze water to generate H+ and OH-, and under the joint action of the electric field and the ion exchange membrane, the directional migration and exchange of ions are realized. The regeneration liquid channel set in the suppressor is generally in series, which not only leads to uneven pressure in the two regeneration chambers, causing a large pressure difference between the ion exchange membranes and affecting the service life, but also the ion concentration of the regeneration liquid in the two regeneration chambers gradually increases, affecting the electrolysis rate and suppression effect. The OH- and H+ generated in the regeneration chambers are connected in series and then recombine into water, which also affects the electrolysis efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an ion chromatography analysis system, which can reduce the pressure difference of the ion exchange membrane, extend the service life, and improve the electrolysis efficiency and inhibition effect.

[0005] The ion chromatography analysis system according to an embodiment of the present utility model includes: an ion chromatography suppressor, a conductivity cell and a shunt constant current device, the ion chromatography suppressor includes a first regeneration chamber, a first regeneration inlet, a first regeneration outlet, a suppression chamber, a second regeneration chamber, a second regeneration inlet and a second regeneration outlet, a first ion exchange membrane is provided between the first regeneration chamber and the suppression chamber, a second ion exchange membrane is provided between the second regeneration chamber and the suppression chamber, the first regeneration inlet and the second regeneration outlet are respectively communicated with the first regeneration chamber, and the second regeneration inlet and the second regeneration outlet are respectively communicated with the second regeneration chamber;

[0006] The outlet of the suppression chamber, the conductivity cell and the shunt constant current device are connected in sequence, and the shunt constant current device is respectively connected to the first regeneration inlet and the second regeneration inlet so that the regeneration liquid flows evenly to the first regeneration inlet and the second regeneration inlet respectively.

[0007] According to the ion chromatography analysis system of an embodiment of the present invention, the first regeneration chamber and the second regeneration chamber are arranged in parallel, and the first regeneration inlet and the second regeneration inlet are respectively connected through a shunt constant current device, so that the flow to the first regeneration chamber and the second regeneration chamber is uniform, the pressure difference is reduced, the service life of the ion exchange membrane is extended, and the cumulative increase of ion concentration in the regeneration chamber is prevented, and the series connection is prevented so as to prevent the ions from recombine to form water, thereby improving the electrolysis efficiency and the suppression chamber effect.

[0008] According to some embodiments of the present invention, the first regeneration inlet and the first regeneration outlet are spaced apart along the extension direction of the suppression chamber, and the first regeneration inlet is away from the outlet of the suppression chamber relative to the first regeneration outlet, so that the flow direction of the regeneration liquid in the first regeneration chamber is opposite to the flow direction of the regeneration liquid in the suppression chamber.

[0009] Optionally, the first regeneration inlet is disposed adjacent to the inlet of the suppression chamber, and the first regeneration outlet is disposed adjacent to the outlet of the suppression chamber.

[0010] According to some embodiments of the present invention, the second regeneration inlet and the second regeneration outlet are spaced apart along the extension direction of the suppression chamber, and the second regeneration inlet is away from the outlet of the suppression chamber relative to the second regeneration outlet, so that the flow direction of the regeneration liquid in the second regeneration chamber is opposite to the flow direction of the regeneration liquid in the suppression chamber.

[0011] Optionally, the second regeneration inlet is arranged adjacent to the inlet of the suppression chamber, and the second regeneration outlet is arranged adjacent to the outlet of the suppression chamber.

[0012] According to some embodiments of the present invention, the ion chromatography suppressor also includes a first splint, a second splint and an inner liner, the first ion exchange membrane is arranged between the inner liner and the first splint and forms the first regeneration chamber between the first splint, the second ion exchange membrane is arranged between the second splint and the inner liner and forms the second regeneration chamber between the second splint, and the suppression chamber is formed by the first ion exchange membrane, the inner liner and the second ion exchange membrane.

[0013] Optionally, the first regeneration inlet and the first regeneration outlet are provided on the first clamping plate, and the second regeneration inlet and the second regeneration outlet are provided on the second clamping plate.

[0014] According to some embodiments of the present invention, the diversion constant flow device is connected to the first regeneration inlet and the second regeneration inlet through pipes, and the connecting pipe between the diversion constant flow device and the first regeneration inlet and the connecting pipe between the diversion constant flow device and the second regeneration inlet have the same diameter.

[0015] According to some embodiments of the present invention, the flow-dividing and constant-flow device is a flow-dividing and constant-flow valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a schematic cross-sectional view of an ion chromatography suppressor of an ion chromatography analysis system according to an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the structure of an ion chromatography analysis system according to an embodiment of the present invention;

[0019] Reference numerals:

[0020] 100: ion chromatography analysis system;

[0021] 10: ion chromatography suppressor;

[0022] 11: first clamping plate, 111: first regeneration inlet, 112: first regeneration outlet, 12: second clamping plate, 121: second regeneration inlet, 122: second regeneration outlet, 13: first ion exchange membrane, 14: second ion exchange membrane, 15: first regeneration chamber, 16: second regeneration chamber, 17: liner, 18: suppression chamber, 181: inlet of suppression chamber, 182: outlet of suppression chamber;

[0023] 20: conductivity cell, 30: shunt constant current device. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0029] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0030] The ion chromatography analysis system 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0031] The ion chromatography analysis system 100 according to an embodiment of the present invention includes an ion chromatography suppressor 10, a conductivity cell 20 and a shunt constant current device 30, wherein the ion chromatography suppressor 10, the conductivity cell 20 and the shunt constant current device 30 are connected in sequence.

[0032] The ion chromatography suppressor 10 includes a first regeneration chamber 15, a first regeneration inlet 111, a first regeneration outlet 112, a suppression chamber 18, a second regeneration chamber 16, a second regeneration inlet 121 and a second regeneration outlet 122. A first ion exchange membrane 13 is provided between the first regeneration chamber 15 and the suppression chamber 18, and a second ion exchange membrane 14 is provided between the second regeneration chamber 16 and the suppression chamber 18. The first regeneration inlet 111 and the second regeneration outlet 122 are respectively connected to the first regeneration chamber 15, and the second regeneration inlet 121 and the second regeneration outlet 122 are respectively connected to the second regeneration chamber 16.

[0033] Specifically, if Figure 1As shown, the first regeneration chamber 15 and the second regeneration chamber 16 are respectively located on both sides of the suppression chamber 18, and the first regeneration chamber 15 and the suppression chamber 18 are connected through the first ion exchange membrane 13, and the second regeneration chamber 16 and the suppression chamber 18 are connected through the second ion exchange membrane 14. The regeneration liquid is electrolyzed to generate ions in the first regeneration chamber 15 and the second regeneration chamber 16, and the eluent and the sample flow in the suppression chamber 18. In this way, the ions electrolyzed in the regeneration chamber, the ions in the eluent and the sample can selectively pass through the first ion exchange membrane 13 and the second ion exchange membrane 14 under the action of the electric field, so as to move in the first regeneration chamber 15, the second regeneration chamber 16 and the suppression chamber 18, thereby realizing directional migration and exchange of ions, reducing background conductivity, and improving the sensitivity of the ions to be measured.

[0034] The regeneration liquid of the first regeneration chamber 15 enters from the first regeneration inlet 111 and flows out from the first regeneration outlet 112; the regeneration liquid of the second regeneration chamber 16 enters from the second regeneration inlet 121 and flows out from the second regeneration outlet 122; the eluent and the sample enter the suppression chamber 18 from the inlet 181 of the suppression chamber 18 and flow out from the outlet 182 of the suppression chamber 18. That is, the first regeneration chamber 15 and the second regeneration chamber 16 are respectively provided with an inlet and an outlet, and the two regeneration chambers are arranged in parallel. Compared with the series design, the regeneration liquid in the ion chromatography suppressor 10 does not need to flow in a series manner through the first regeneration chamber 15, the suppression chamber 18, the second regeneration chamber 16 and finally out of the first regeneration chamber 15, thereby controlling the pressure of the two regeneration chambers, reducing the pressure difference of the ion exchange membrane, and extending its service life. In addition, the two regeneration chambers have outlets respectively, and the first regeneration inlet 111 and the second regeneration inlet 121 can be connected to the waste liquid pipeline respectively, so as to discharge the waste liquid, thereby preventing the gradual increase of the ion concentration in the two regeneration chambers and improving the electrolysis effect; at the same time, the H+ and OH- in the two regeneration chambers can also be directly discharged without mixing with each other, thereby preventing the H+ and OH- in the two regeneration chambers from recombining into water and affecting the electrolysis efficiency.

[0035] like Figure 2 As shown, the outlet 182 of the suppression chamber 18, the conductivity cell 20 and the diversion constant current device 30 are connected in sequence, and the diversion constant current device 30 is respectively connected to the first regeneration inlet 111 and the second regeneration inlet 121 so that the regeneration liquid flows evenly to the first regeneration inlet 111 and the second regeneration inlet 121 respectively.

[0036] Specifically, the eluent and sample in the suppression chamber 18 flow out from the outlet 182 of the suppression chamber 18 and flow to the conductivity cell 20, and then flow to the diversion constant current device 30, wherein the ions in the regeneration chamber and the ions in the eluent can combine to form a regeneration liquid; the conductivity cell 20 is used to detect the conductivity of the liquid flowing through, and the diversion constant current device 30 is used to divert the flowing liquid and evenly flow it to the first regeneration inlet 111 and the second regeneration inlet 121 respectively. In this way, the regenerated regeneration liquid is respectively flowed to the first regeneration chamber 15 and the second regeneration chamber 16 through the diversion constant current device 30, which not only realizes the recycling of the regeneration liquid, but also the diversion constant current device 30 can control the flow rate flowing to the first regeneration chamber 15 and the second regeneration chamber 16, so that the flow rate flowing to the two regeneration chambers is the same, thereby achieving pressure uniformity of the parallel first regeneration chamber 15 and the second regeneration chamber 16, reducing the pressure difference between the first ion exchange membrane 13 and the second ion exchange membrane 14, and improving the service life, thereby improving the electrolysis efficiency and the suppression effect.

[0037] According to the ion chromatography analysis system 100 of the embodiment of the present invention, the first regeneration chamber 15 and the second regeneration chamber 16 are arranged in parallel, and are respectively connected to the first regeneration inlet 111 and the second regeneration inlet 121 through the diversion constant current device 30, so that the flow rate flowing to the first regeneration chamber 15 and the second regeneration chamber 16 is uniform, the pressure difference is reduced, the service life of the ion exchange membrane is extended, and the cumulative increase of ion concentration in the regeneration chamber is prevented, and the series connection is prevented to prevent the ions from recombine to form water, so as to improve the electrolysis efficiency and the inhibition effect.

[0038] In some embodiments of the present invention, the first regeneration inlet 111 and the first regeneration outlet 112 are spaced apart along the extension direction of the suppression chamber 18. It should be understood that the extension direction of the suppression chamber 18 herein refers to the flow direction of the liquid in the suppression chamber 18, for example, from the inlet 181 of the suppression chamber 18 to the outlet 182 of the suppression chamber 18. The first regeneration inlet 111 and the first regeneration outlet 112 are spaced apart along the extension direction of the suppression chamber 18, that is, the first regeneration inlet 111 and the first regeneration outlet 112 are spaced apart in the direction of the liquid flow in the suppression chamber 18. Furthermore, the first regeneration inlet 111 is farther from the outlet 182 of the suppression chamber 18 than the first regeneration outlet 112. That is, in the direction of liquid flow, the distance between the first regeneration outlet 112 and the outlet 182 of the suppression chamber 18 is smaller than the distance between the first regeneration inlet 111 and the outlet 182 of the suppression chamber 18. This ensures that the flow direction of the regeneration liquid in the first regeneration chamber 15 is opposite to that of the regeneration liquid in the suppression chamber 18, thereby increasing the reaction time of the first regeneration chamber 15 and the suppression chamber 18 and improving the suppression effect.

[0039] In such Figure 2In the example shown, the first regeneration inlet 111 is arranged adjacent to the inlet 181 of the suppression chamber 18, and the first regeneration outlet 112 is arranged adjacent to the outlet 182 of the suppression chamber 18, thereby increasing the reverse flow distance of the liquid in the first regeneration chamber 15 and the suppression chamber 18, so as to further increase the reaction time and improve the suppression effect.

[0040] In some embodiments of the present invention, the second regeneration inlet 121 and the second regeneration outlet 122 are spaced apart along the extension direction of the suppression chamber 18. It should be understood that the extension direction of the suppression chamber 18 herein refers to the flow direction of the liquid in the suppression chamber 18, for example, from the inlet 181 of the suppression chamber 18 to the outlet 182 of the suppression chamber 18. The second regeneration inlet 121 and the second regeneration outlet 122 are spaced apart along the extension direction of the suppression chamber 18, that is, the second regeneration inlet 121 and the second regeneration outlet 122 are spaced apart in the direction of the liquid flow in the suppression chamber 18. Furthermore, the second regeneration inlet 121 is further away from the outlet 182 of the suppression chamber 18 than the second regeneration outlet 122. That is, in the direction of liquid flow, the distance between the second regeneration outlet 122 and the outlet 182 of the suppression chamber 18 is less than the distance between the second regeneration inlet 121 and the outlet 182 of the suppression chamber 18. This ensures that the flow direction of the regeneration liquid in the second regeneration chamber 16 is opposite to that of the regeneration liquid in the suppression chamber 18, thereby increasing the reaction time between the second regeneration chamber 16 and the suppression chamber 18 and improving the suppression effect.

[0041] In such Figure 2 In the example shown, the second regeneration inlet 121 is arranged adjacent to the inlet 181 of the suppression chamber 18, and the second regeneration outlet 122 is arranged adjacent to the outlet 182 of the suppression chamber 18, thereby increasing the reverse flow distance of the liquid in the second regeneration chamber 16 and the suppression chamber 18, so as to further increase the reaction time and improve the suppression effect.

[0042] In some embodiments of the present invention, the ion chromatography suppressor 10 also includes a first splint 11, a second splint 12 and an inner liner 17, the first ion exchange membrane 13 is arranged between the inner liner 17 and the first splint 11 and forms a first regeneration chamber 15 with the first splint 11, the second ion exchange membrane 14 is arranged between the second splint 12 and the inner liner 17 and forms a second regeneration chamber 16 with the second splint 12, and the suppression chamber 18 is formed by the first ion exchange membrane 13, the inner liner 17 and the second ion exchange membrane 14, thereby the first ion exchange membrane 13 and the second ion exchange membrane 14 can define a mutually isolated first regeneration chamber 15, a second regeneration chamber 16 and an suppression chamber 18 between the first splint 11, the second splint 12 and the inner liner 17, and the ion chromatography suppressor 10 also includes a first electrode and a second electrode, the first electrode extends into the first regeneration chamber 15, and the second electrode extends into the second regeneration chamber 16, so as to be used to electrolyze the regeneration liquid in the regeneration chamber respectively.

[0043] like Figure 1 As shown, the first regeneration inlet 111 and the first regeneration outlet 112 are provided on the first clamping plate 11 , and the second regeneration inlet 121 and the second regeneration outlet 122 are provided on the second clamping plate 12 , which has a simple structure and is convenient for pipeline connection.

[0044] Alternatively, as Figure 1 As shown, the first regeneration inlet 111 and the first regeneration outlet 112 are formed in the first clamping plate 11 and do not extend beyond the side wall of the first clamping plate 11. The second regeneration inlet 121 and the second regeneration outlet 122 are formed in the second clamping plate 12 and do not extend beyond the side wall of the second clamping plate 12. Pipes can be extended into the first clamping plate 11 and the second clamping plate 12 for connection. This simplifies the structure and makes the overall structure of the ion chromatography suppressor 10 more compact. Alternatively, the first regeneration inlet 111 and the first regeneration outlet 112 can protrude from the side wall of the first clamping plate 11 to form a protruding connection port, and the second regeneration inlet 121 and the second regeneration outlet 122 can protrude from the side wall of the second clamping plate 12 to form a protruding connection port, to facilitate pipeline connection and maintenance.

[0045] In some embodiments of the present invention, the diversion constant flow device 30 is connected to the first regeneration inlet 111 and the second regeneration inlet 121 by pipes, and the connecting pipe between the diversion constant flow device 30 and the first regeneration inlet 111 and the connecting pipe between the diversion constant flow device 30 and the second regeneration inlet 121 have the same diameter, thereby further ensuring that the flow to the first regeneration chamber 15 and the second regeneration chamber 16 is uniform and the pressure is balanced.

[0046] In some embodiments of the present invention, the diversion constant flow device 30 is a diversion constant flow valve, which can be a valve integrating diversion and flow control functions, or can be a combination valve of a diversion valve and a constant flow valve, as long as it can achieve the diversion function and make the flow to the first regeneration inlet 111 and the second regeneration inlet 121 uniform.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An ion chromatography analysis system, characterized in that: include: An ion chromatography suppressor, the ion chromatography suppressor comprising a first regeneration chamber, a first regeneration inlet, a first regeneration outlet, a suppression chamber, a second regeneration chamber, a second regeneration inlet, and a second regeneration outlet, a first ion exchange membrane being provided between the first regeneration chamber and the suppression chamber, a second ion exchange membrane being provided between the second regeneration chamber and the suppression chamber, the first regeneration inlet and the second regeneration outlet being respectively communicated with the first regeneration chamber, and the second regeneration inlet and the second regeneration outlet being respectively communicated with the second regeneration chamber; The conductivity cell and the shunt constant current device, the outlet of the suppression chamber, the conductivity cell and the shunt constant current device are connected in sequence, and the shunt constant current device is respectively connected to the first regeneration inlet and the second regeneration inlet so that the regeneration liquid flows evenly to the first regeneration inlet and the second regeneration inlet respectively.

2. The ion chromatography analysis system according to claim 1, characterized in that The first regeneration inlet and the first regeneration outlet are spaced apart along the extension direction of the suppression chamber, and the first regeneration inlet is away from the outlet of the suppression chamber relative to the first regeneration outlet, so that the flow direction of the regeneration liquid in the first regeneration chamber is opposite to the flow direction of the regeneration liquid in the suppression chamber.

3. The ion chromatography analysis system according to claim 2, characterized in that The first regeneration inlet is disposed adjacent to the inlet of the suppression chamber, and the first regeneration outlet is disposed adjacent to the outlet of the suppression chamber.

4. The ion chromatography analysis system according to claim 1, characterized in that The second regeneration inlet and the second regeneration outlet are spaced apart along the extension direction of the suppression chamber, and the second regeneration inlet is away from the outlet of the suppression chamber relative to the second regeneration outlet, so that the flow direction of the regeneration liquid in the second regeneration chamber is opposite to the flow direction of the regeneration liquid in the suppression chamber.

5. The ion chromatography analysis system according to claim 4, characterized in that The second regeneration inlet is disposed adjacent to the inlet of the suppression chamber, and the second regeneration outlet is disposed adjacent to the outlet of the suppression chamber.

6. The ion chromatography analysis system according to claim 1, characterized in that The ion chromatography suppressor also includes a first splint, a second splint and an inner liner. The first ion exchange membrane is arranged between the inner liner and the first splint and forms the first regeneration chamber between the first splint and the first splint. The second ion exchange membrane is arranged between the second splint and the inner liner and forms the second regeneration chamber between the second splint. The suppression chamber is formed by the first ion exchange membrane, the inner liner and the second ion exchange membrane.

7. The ion chromatography analysis system according to claim 6, characterized in that The first regeneration inlet and the first regeneration outlet are provided on the first clamping plate, and the second regeneration inlet and the second regeneration outlet are provided on the second clamping plate.

8. The ion chromatography analysis system according to claim 1, characterized in that The diversion constant flow device is connected to the first regeneration inlet and the second regeneration inlet via pipes, and the connecting pipe between the diversion constant flow device and the first regeneration inlet and the connecting pipe between the diversion constant flow device and the second regeneration inlet have the same diameter.

9. The ion chromatography analysis system according to claim 1, characterized in that The diversion constant flow device is a diversion constant flow valve.

Images