High-efficiency anion leacheate generator

Abstract

The invention relates to the technical field of analytical instruments, in particular to a high-efficiency anion leacheate generator. According to the anion leacheate generator, the top of an upper shell is connected with a liquid container; the upper shell is connected with the lower shell, and a cation exchange membrane is arranged between the upper shell and the lower shell; the first electrode is arranged on the side wall of the upper shell and electrically connected with the first electrode slice, the second electrode is arranged on the lower shell and electrically connected with the second electrode slice, the bottom of the first electrode slice is covered with a photoelectric catalyst coating, and the light source assembly is located below the first electrode slice and arranged on the upper shell; bulges are arranged on the surface, in contact with the cation exchange membrane, of the lower shell, one part of the cation exchange membrane is located in an area defined by the bulges, the other part of the cation exchange membrane is pressed on the top surfaces of the bulges by the upper shell, the area defined by the bulges and the cation exchange membrane is a leacheate channel, and a conductive porous filler is placed in the leacheate channel; and a protection net is arranged above the cation exchange membrane. The mechanical damage of the ion exchange membrane is effectively prevented, and the leacheate generation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of analytical instrument technology, in particular to a high-efficiency anion eluent generator. BACKGROUND

[0002] The eluent generator is used for gradient or isocratic elution in ion chromatography analysis. The ion exchange membrane of the existing eluent generator has no supporting protection part. Due to unstable liquid flow and air pressure, the ion exchange membrane is prone to deformation. Such deformation not only affects the mass transfer efficiency of the membrane, but also reduces the mechanical strength of the membrane, eventually leading to damage of the membrane. Therefore, the ion exchange membrane needs to be replaced frequently, which increases the workload and unnecessary loss. In addition, the existing eluent generator also has obvious deficiencies in eluent generation efficiency. The low-efficiency eluent generation process may also lead to unstable eluent concentration, affecting the separation effect and detection accuracy of ion chromatography. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a high-efficiency anion eluent generator, which effectively prevents mechanical damage of the ion exchange membrane and improves the eluent generation efficiency.

[0004] The present application provides a high-efficiency anion eluent generator, comprising:

[0005] The top of the upper shell is connected with the liquid container;

[0006] The upper shell is connected with the lower shell, and a cation exchange membrane is arranged between the upper shell and the lower shell;

[0007] A first electrode is arranged on the side wall of the upper shell and electrically connected with a first electrode sheet, and a second electrode is arranged on the lower shell and electrically connected with a second electrode sheet, wherein the bottom of the first electrode sheet is covered with a photoelectrocatalyst coating,

[0008] A light source assembly is arranged below the first electrode sheet and on the upper shell, and provides light for the photoelectrocatalyst coating;

[0009] The surface of the lower shell in contact with the cation exchange membrane has a protrusion, a part of the cation exchange membrane is located in the area surrounded by the protrusion, and a part of the cation exchange membrane is pressed on the top surface of the protrusion by the upper shell, the area surrounded by the protrusion and the cation exchange membrane is an eluent channel, and a conductive porous filler is placed in the eluent channel;

[0010] A protective net is arranged above the cation exchange membrane.

[0011] In a specific embodiment of the present application, the surface of the photoelectrocatalyst coating has protrusions.

[0012] In a specific embodiment of the present application, the protrusions are of nanometer scale or micrometer scale.

[0013] In one embodiment of the present application, the light source assembly comprises a first lens and a second lens, and the first lens and the second lens are oppositely arranged.

[0014] The light source is irradiated on the photoelectrocatalyst coating and the second lens through the first lens, and the light source is reflected on the photoelectrocatalyst coating to the first lens and the second lens, and then irradiated on the coating again through the first lens and the second lens.

[0015] In one embodiment of the present application, the first electrode sheet is an anode.

[0016] In one embodiment of the present application, the first electrode sheet and the second electrode sheet are platinum sheets.

[0017] In one embodiment of the present application, the cation exchange membrane has an area larger than that of the first electrode sheet.

[0018] In one embodiment of the present application, the porous filler has electrical conductivity.

[0019] In one embodiment of the present application, the liquid container side wall is provided with a downwardly open gas outlet, and an upper liquid conduit, part of which is located outside the liquid container and part of which is located inside the liquid container, and the two parts are arranged at an angle, the part of the liquid conduit located outside the liquid container is parallel to the top of the liquid container, and the liquid conduit opening located inside the liquid container is in contact with the inner wall of the liquid container.

[0020] In one embodiment of the present application, the lower shell is provided with a leaching liquid outlet.

[0021] Compared with the prior art, the high-efficiency anion leaching liquid generator of the present application has the following beneficial effects:

[0022] (1) By introducing a high-efficiency photoelectrocatalyst coating and increasing the catalytic area, combined with the physical support design of the cation exchange membrane, the generation efficiency of the leaching liquid is improved, the mechanical damage of the cation exchange membrane is effectively prevented, and the service life is prolonged. At the same time, the production speed and stability of the leaching liquid are improved, the electrode consumption is reduced, the operation cost is reduced, and the efficiency and quality of the ion chromatography analysis pretreatment process are greatly optimized.

[0023] (2) By covering the photoelectrocatalyst coating on the bottom of the electrode sheet and arranging the light source assembly to provide light, the effective conversion of light energy to chemical energy is realized, the redox reaction is promoted, and the generation efficiency and purity of the leaching liquid are improved.

[0024] (3) By optimizing the porous filler and protective net in the eluent channel, the problem of ion exchange membrane deformation caused by unstable liquid flow and air pressure in the traditional eluent generator was solved, ensuring the stability of the eluent concentration and the ion chromatography separation effect, providing more accurate and reliable protection for laboratory analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Fig. 1 A schematic diagram showing the structure of a high-efficiency anion eluent generator according to the present invention;

[0026] Fig. 2 Schematic diagram showing the interior of a high-efficiency anion eluent generator;

[0027] Fig. 3 A schematic cross-sectional view showing a high-efficiency anion eluent generator;

[0028] Fig. 4 Explosion diagram showing a high-efficiency anion eluent generator;

[0029] Fig. 5 A partial schematic diagram showing a high-efficiency anion eluent generator;

[0030] In the figure: 1-liquid container; 2-upper shell; 3-lower shell; 3a-protrusion; 4-liquid pipeline; 5-gas outlet; 6-eluent outlet; 7-eluent channel; 8-cation exchange membrane; 9-first electrode; 10-first electrode sheet; 11-second electrode; 12-second electrode sheet; 13-light source assembly; 13a-first lens; 13b-second lens; 14-photoelectrocatalyst coating; 15-protective net; 16-accommodating cavity. DETAILED DESCRIPTION

[0031] In order to further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than for limiting the present invention.

[0032] The embodiment of the present invention discloses a high-efficiency anion eluent generator, such as Figs. 1-5 As shown, it includes: a liquid container 1, a lower shell 3, a first electrode 9, a second electrode 11, a first electrode sheet 10, a second electrode sheet 12, a cation exchange membrane 8, an upper shell 2 and a light source assembly 13;

[0033] The upper shell 2 is detachably connected with the liquid container 1, the lower shell 3 is connected with the upper shell 2 through bolts, a containing cavity 16 is formed between the container and the upper shell, the side wall of the liquid container 1 is provided with a gas outlet 5, oxygen generated by the anode of the generator is discharged from the gas outlet, the gas outlet 5 is downwardly opened to prevent air substances from entering, and a liquid pipeline 4 is arranged above the liquid container 1 to pass the eluent into the liquid container, so that the eluent can be loaded without detaching the liquid container from the upper shell, and the workload is effectively reduced.

[0034] The liquid pipeline 4 is arranged at an angle, one part of the pipeline is arranged outside the liquid container 1, and the other part is arranged inside the liquid container 1, the two parts are arranged at an angle, the pipeline part arranged outside the liquid container 1 is parallel to the top of the liquid container 1, and the liquid pipeline opening arranged inside the liquid container 1 is in contact with the inner wall of the liquid container 1, so that the liquid passing in flows down along the container wall and the impact on other internal components is reduced.

[0035] The cation exchange membrane 8 is clamped between the upper shell 2 and the lower shell 3 and located between the first electrode sheet 10 and the second electrode sheet 12, the first electrode 9 is arranged on the side wall of the upper shell 2 and electrically connected with the first electrode sheet 10, the second electrode 11 is arranged on the lower shell 2 and electrically connected with the second electrode sheet 12, the surface of the lower shell 3 in contact with the cation exchange membrane 8 is provided with a protrusion 3a, the area of the cation exchange membrane 8 is greater than that of the first electrode sheet 10, one part of the cation exchange membrane 8 is located in the area surrounded by the protrusion 3a, and the other part is tightly pressed on the top surface of the protrusion 3a by the upper shell 2, the area surrounded by the protrusion 3a and the cation exchange membrane is the eluent channel 7, and the porous filler is placed in the eluent channel 7.

[0036] The porous filler provides physical support for the cation exchange membrane 8, uniformly distributes pressure, prevents the cation exchange membrane 8 from being deformed or damaged under the action of pressure, and increases the service life of the cation exchange membrane 8, the protective net 15 is further arranged above the cation exchange membrane 8 to support the cation exchange membrane 8 and prevent the cation exchange membrane 8 from being deformed under the action of pressure.

[0037] The porous filler has the electric conductivity, the electrically conductive porous filler not only can promote the migration of ions in the electrolyte, but also can reduce the contact resistance between the electrode and the membrane, reduce the energy loss, effectively increase the efficiency of the eluent generation without affecting the flow of the eluent.

[0038] The first electrode sheet and the second electrode sheet are platinum sheets, and the first electrode sheet is an anode, the liquid container containing the eluent will produce impurities inside after long time work, the impurities will adhere to the electrode, causing the electrode to be damaged and reducing the reaction efficiency, the platinum sheet is adopted to reduce the electrode loss and improve the reaction effect.

[0039] Meanwhile, the present application is coated with a photoelectrocatalyst coating 14 at the bottom of the first electrode sheet 10, and the surface of the photoelectrocatalyst coating 14 has protrusions in order to increase the contact area of the catalyst with the liquid. Preferably, the protrusions have a micro- or nano-scale.

[0040] In order to provide a light source for the photoelectrocatalyst coating 14, a light source assembly 13 is provided, which is arranged below the first electrode sheet 10 and on the upper housing 2.

[0041] Preferably, the light source assembly 13 comprises a first lens 13a and a second lens 13b, which are arranged opposite to each other, and the light source is irradiated on the photoelectrocatalyst coating 14 through the first lens 13a and the second lens 13b. The light source is irradiated on the photoelectrocatalyst coating 14 through the first lens 13a and the second lens 13b, and is reflected on the photoelectrocatalyst coating 14, and is reflected to the first lens 13a and the second lens 13b again, and is irradiated on the coating again through the first lens 13a and the second lens 13b, so that the light source is fully utilized.

[0042] According to the present application, when the power is turned on, the current is conducted to the first electrode sheet 10 and the second electrode sheet 12 through the first electrode 9 and the second electrode 11, and an electric field is formed on both sides of the cation exchange membrane 8. At this time, the cations K + The cations K+ in the electrolyte migrate to the cathode side through the cation exchange membrane 8, and the oxidation reaction occurs on the anode side, and oxygen is precipitated, and the reduction reaction occurs on the cathode side, and hydrogen is precipitated, so that the eluate contains the required KOH solution and hydrogen, and the generated eluate is introduced into the degassing box through the eluate outlet 6 for treatment, hydrogen is precipitated, and the eluate with the required concentration is obtained.

[0043] The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be noted that for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency anion eluent generator, characterized in that: include: The top of the upper shell is connected to the liquid container; The upper shell is connected to the lower shell, and a cation exchange membrane is arranged between the two; The first electrode is arranged on the side wall of the upper shell and is electrically connected to the first electrode sheet. The second electrode is arranged on the lower shell and is electrically connected to the second electrode sheet. The bottom of the first electrode sheet is covered with a photoelectric catalyst coating. The light source assembly is located below the first electrode sheet and is disposed on the upper housing to provide light for the photoelectric catalyst coating; The surface of the lower shell that contacts the cation exchange membrane has a protrusion, a portion of the cation exchange membrane is located in the area surrounded by the protrusion, and a portion is pressed against the top surface of the protrusion by the upper shell. The area surrounded by the protrusion and the cation exchange membrane is an eluent channel, and a conductive porous filler is placed in the eluent channel; A protective net is provided above the cation exchange membrane.

2. The high-efficiency anion eluent generator according to claim 1, characterized in that: The surface of the photoelectrocatalyst coating layer has protrusions.

3. The high-efficiency anion eluent generator according to claim 2, characterized in that: The protrusions are of nanometer scale or micrometer scale.

4. The high-efficiency anion eluent generator according to claim 1, characterized in that: The light source assembly includes a first lens and a second lens, and the first lens and the second lens are arranged opposite to each other; The light source is irradiated onto the photoelectric catalyst coating and the second lens through the first lens, and is reflected on the photoelectric catalyst coating, reflecting the light source onto the first lens and the second lens, and then irradiated onto the coating again through the first lens and the second lens.

5. The high-efficiency anion eluent generator according to claim 1, characterized in that: The first electrode sheet is an anode.

6. The high-efficiency anion eluent generator according to claim 1, characterized in that: The first electrode sheet and the second electrode sheet are platinum sheets.

7. The high-efficiency anion eluent generator according to claim 1, characterized in that: The area of ​​the cation exchange membrane is larger than the area of ​​the first electrode sheet.

8. The high-efficiency anion eluent generator according to claim 1, characterized in that: The porous filler has electrical conductivity.

9. The high-efficiency anion eluent generator according to claim 1, characterized in that: The side wall of the liquid container is provided with a gas outlet opening downward, and a liquid pipe is provided above it. Part of the liquid pipe is located outside the liquid container, and part is located inside the liquid container. The two parts are arranged at an angle. The pipe part located outside the liquid container is parallel to the top of the liquid container, and the liquid pipe opening located inside the liquid container is in contact with the inner wall of the liquid container.

10. The high-efficiency anion eluent generator according to claim 1, characterized in that: The lower shell is provided with an eluent outlet.

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