CN217324347U - Chlor-alkali ionic membrane in-situ membrane voltage testing device - Google Patents
Chlor-alkali ionic membrane in-situ membrane voltage testing device Download PDFInfo
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- CN217324347U CN217324347U CN202123449014.6U CN202123449014U CN217324347U CN 217324347 U CN217324347 U CN 217324347U CN 202123449014 U CN202123449014 U CN 202123449014U CN 217324347 U CN217324347 U CN 217324347U
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Abstract
The utility model relates to a chlor-alkali ionic membrane analysis and evaluation technical field specifically is a chlor-alkali ionic membrane in situ membrane voltage testing arrangement, be two electrolysis trough and two lujin capillary that mirror symmetry is including the ionic membrane that awaits measuring and the ionic membrane both sides that await measuring, the leading flank of electrolysis trough is opened there are inlet and liquid outlet, the plate electrode has been inlayed to the lateral wall of electrolysis trough, plate electrode and the inside intercommunication of electrolysis trough, the through-hole that has supply electrolyte and the ionic membrane contact that awaits measuring is opened to the inside wall of electrolysis trough, the lujin capillary inserts in the electrolysis trough, be equipped with the reference electrode in the lujin capillary, the bottom of reference electrode is located the department of buckling of lujin capillary, the top of reference electrode is connected with the voltmeter. The device realizes real-time circulation of the solution in the electrolytic cell, effectively prevents the measured data from fluctuating due to the concentration and temperature change of the electrolyte in the chamber, ensures the distance between the electrode plate and the ionic membrane to be measured to be constant, and ensures the uniformity of the current density passing through the membrane.
Description
Technical Field
The utility model relates to a chlor-alkali ionic membrane analysis and evaluation technical field specifically is a chlor-alkali ionic membrane in situ membrane voltage testing arrangement.
Background
The ion membrane is an ion selective exchange membrane, which is called membrane-like ion exchange resin for short, and can allow cations to permeate through and block anions to permeate through. The in-situ membrane voltage of the chlor-alkali ionic membrane is determined by the structure of the membrane, and because the product preparation processes, production equipment and technical levels of different manufacturers are different and the batches are different, the performance of the prepared chlor-alkali ionic membrane is different, the intuitive data of the performance of each ionic membrane is reflected on the in-situ membrane voltage of the chlor-alkali ionic membrane, and the in-situ membrane voltage is measured, so that the evaluation can be performed on different chlor-alkali ionic membranes, the performance change condition of the same ionic membrane before and after use can be inspected, and the technical basis is provided for the research and development and performance improvement of the chlor-alkali ionic membrane.
Chinese patent document CN 213875508U (application No. 202022930446.8) discloses a device for measuring the surface resistance and conductivity of an ion-conducting membrane, which is a whole composed of an electrolytic cell, a luggin capillary tube, a reference electrode, a motor, a membrane sample to be measured, a conduit, a peristaltic pump and a liquid storage bottle, and adopts a four-wire system structure, wherein a current measuring line and a voltage measuring line are separated, so that the wire resistance and the contact resistance can be eliminated, and the tip of the capillary tube is close to the membrane by adopting the luggin capillary tube, so that the influence of the solution resistance can be reduced, and the measurement error can be reduced. However, the device cannot pump the solution to be tested by using a peristaltic pump, so that the solution in the electrolytic cell cannot be circulated in real time in the testing process, the concentration of the solution in the electrolytic cell is reduced along with the experiment, the temperature of the solution in the electrolytic cell cannot be ensured, the ionic membrane cannot be tested by using a large current, and the data measured by using the device has a large error and cannot be used for calculating the membrane voltage of the ionic membrane.
Therefore, in order to solve these problems, it is necessary to provide a novel membrane voltage testing apparatus to provide a stable solution state to meet the testing requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming above-mentioned prior art not enough, provide a chlor-alkali ionic membrane in situ membrane voltage testing arrangement, through setting up inlet and liquid outlet respectively in the below and the top of plate electrode, realized carrying out real-time cycle to solution in the electrolytic cell, and prevent effectively that it is undulant to record data because of electrolyte concentration and temperature variation produce in the cavity, fix the electrode slice in cavity lateral wall department simultaneously, with guarantee that electrode slice and ionic membrane distance that awaits measuring are invariable, ensure that the current density size through the membrane is even.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a chlor-alkali ionic membrane in situ membrane voltage testing arrangement, is two electrolysis trough of mirror symmetry including the ionic membrane that awaits measuring and the ionic membrane both sides that await measuring, the leading flank of electrolysis trough is opened there are inlet and liquid outlet, the lateral wall of electrolysis trough has inlayed the plate electrode, the inside intercommunication of plate electrode and electrolysis trough, the inside wall of electrolysis trough is opened has the through-hole that supplies electrolyte and the ionic membrane contact that awaits measuring, the through-hole is the same with the plate electrode size and is located same horizontal position, be equipped with the lu jin capillary in the electrolysis trough, and the point of the lu jin capillary is chewed towards the ionic membrane that awaits measuring, be equipped with the reference electrode in the lu jin capillary, the bottom of reference electrode is located the department of buckling of lu jin capillary, the top of reference electrode is connected with the voltmeter.
The testing device provided by the utility model is provided with the liquid inlet and the liquid outlet, so that the electrolyte in the electrolytic cell is circulated in the use process, and the relative constancy of the concentration and the temperature of the solution in the electrolytic cell is maintained; the electrode plates are fixed on the side wall of the electrolytic cell to ensure constant distance between the electrode plates and the ionic membrane to be detected and ensure uniform current density passing through the membrane.
Preferably, the liquid inlet and the liquid outlet are respectively positioned below and above the electrode plate, and the size of the liquid outlet is larger than that of the liquid inlet.
Through setting up inlet and liquid outlet respectively in the below and the top of plate electrode, compare with current test equipment, this device has effectively guaranteed that solution circulation in-process voltage is not influenced to it is accurate effective to ensure that membrane voltage record data. The aperture of the liquid outlet is larger than that of the liquid inlet, so that gas generated in the electrolytic process can be smoothly discharged out of the liquid outlet without influencing the circulation of the liquid when the solution is circulated; if the aperture of the liquid outlet is equal to or smaller than that of the liquid inlet, gas and solution can be mixed and reserved, so that the 'breathing phenomenon' is easily caused, more solution is taken away along with the overflow of the gas, and the total amount of the liquid in the cavity is reduced.
Preferably, the testing device further comprises a clamping assembly for clamping and fixing the ionic membrane to be tested, the clamping assembly comprises an end frame arranged on the outer side of the electrolytic cell, four screw rods and nuts used in a matched mode, the screw rods respectively penetrate through four corners of the end frame and are fastened through the nuts, the two electrolytic cells are clamped inwards through the nuts, the ionic membrane to be tested is fixed between the through holes, and the electrolyte is prevented from overflowing.
Preferably, a sealing gasket is arranged between each end frame and the electrolytic cell.
Preferably, the testing device further comprises an electrode lead for connecting the electrode plate with an external power supply device, wherein the electrode lead is connected to the electrode plate through the end frame; further preferably, the electrode leads are divided into an anode lead and a cathode lead, the anode lead is made of titanium, and the cathode lead is made of nickel.
Preferably, the electrode lead is fixed to the end frame using an insulating nut.
The beneficial effects of the utility model are that:
1. the utility model provides a testing arrangement carries out real-time cycle to the solution in the electrolysis trough, has guaranteed the concentration of solution and temperature relatively invariable to through fixing the plate electrode at the electrolysis trough lateral wall, guaranteed that the distance of plate electrode and ionic membrane that awaits measuring is invariable in the test procedure, guarantee that the electron magic flowing through the ionic membrane that awaits measuring is all invariable, further improve the stability of measure data;
2. the aperture of the liquid outlet of the testing device is larger than that of the liquid inlet, so that gas generated in the electrolytic process can be smoothly discharged from the liquid outlet when the solution is circulated, and partial liquid is not taken away when the gas escapes due to 'surge phenomenon', the volume stability of electrolyte in an electrolytic cell is ensured, and the accuracy of the measured data is effectively improved;
3. the plate electrode is fixed in the side wall of the chamber, so that the distance between the plate electrode and the ionic membrane to be tested is constant in the test process, the constant density of electrons flowing through the ionic membrane to be tested is ensured, and the stability of the measured data is further improved.
Drawings
FIG. 1 is a cross-sectional view of the present test device;
wherein, 1, anode end frame; 2. a cathode end frame; 3. an anode plate; 4. a cathode plate; 5. an anodic electrolytic cell; 6. a cathodic electrolysis cell; 7. a lujin capillary; 8. a reference electrode; 9. a voltmeter; 10. sealing gaskets; 11. an anode lead; 12. a cathode lead; 13. a screw; 14. an insulating nut; 15. an ionic membrane to be detected; 16. a nut; 17. a liquid inlet; 18. and a liquid outlet.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, an in-situ membrane voltage testing device for chlor-alkali ionic membrane comprises an ionic membrane 15 to be tested and two electrolytic baths which are mirror-symmetric on two sides of the ionic membrane 15 to be tested, wherein the electrolytic bath on the left side of the ionic membrane 15 to be tested is an anode electrolytic bath 5, and the cathode electrolytic bath 6 is on the right side, the front side surface of the electrolytic bath is provided with a liquid inlet 17 and a liquid outlet 18, the outer side wall of the electrolytic bath is embedded with a plate electrode, the anode electrolytic bath 5 and the cathode electrolytic bath 6 are fixed with an anode plate 3 and a cathode plate 4, the plate electrode is communicated with the inside of the electrolytic bath, the inner side wall of the electrolytic bath is provided with a through hole for the electrolyte to contact with the ionic membrane 15 to be tested, the through hole has the same size as the plate electrode and is located at the same horizontal position, the electrolytic bath is provided with a luggu-jin capillary 7, the tip of the luggin-jin capillary 7 faces the ionic membrane 15 to be tested, a reference electrode 8 is arranged in the luggin capillary 7, the bottom end of the reference electrode 8 is positioned at the bending part of the robust capillary 7, the top end of the reference electrode 8 is connected with a voltmeter 9,
the liquid inlet 17 and the liquid outlet 18 are respectively positioned below and above the electrode plate, and the size of the liquid outlet 18 is larger than that of the liquid inlet 17.
The testing device further comprises a clamping assembly for clamping and fixing the ionic membrane 15 to be tested, the clamping assembly comprises an end frame arranged on the outer side of the electrolytic cell, four screws 13 and nuts 16 used in a matched mode, the outer sides of the anode electrolytic cell 5 and the cathode electrolytic cell 6 are respectively fixed with an anode end frame 1 and a cathode end frame 2, and a sealing gasket 10 is arranged between each end frame and the electrolytic cell. The screws 13 respectively penetrate through four corners of the end frame, and the device is clamped inwards by using nuts 16, so that the ionic membrane 15 to be measured is fixed between the through holes.
The testing device further comprises an electrode lead wire used for connecting the electrode plate with external power supply equipment, the electrode lead wire penetrates through the end frame and is connected to the electrode plate, and the electrode lead wire is fixed with the end frame through an insulating nut 14; further, the electrode leads are divided into an anode lead 11 and a cathode lead 12, the anode lead 11 is made of titanium, and the cathode lead 12 is made of nickel.
The testing device provided by the utility model is provided with the liquid inlet 17 and the liquid outlet 18, so that the electrolyte in the electrolytic cell is circulated in the use process, and the relative constancy of the concentration and the temperature of the solution in the electrolytic cell is maintained; the electrode plate is fixed on the side wall of the electrolytic cell to ensure that the distance between the electrode plate and the ionic membrane 15 to be detected is constant and the current density passing through the membrane is uniform. Through setting up inlet 17 and liquid outlet 18 respectively in the below and the top of plate electrode, compare with current test equipment, this device has effectively guaranteed that solution circulation in-process voltage is not influenced to it is accurate effective to ensure that membrane voltage record data. The aperture of the liquid outlet 18 is larger than that of the liquid inlet 17, so that gas generated in the electrolytic process can be smoothly discharged out of the liquid outlet 18 without influencing the circulation of the liquid when the solution is circulated; if the aperture of the liquid outlet 18 is equal to or smaller than the aperture of the liquid inlet 17, the gas and the solution are mixed and left, which easily causes a 'surge' phenomenon, and the total amount of the liquid in the chamber is reduced as the gas overflows and takes away more solution.
When the device is used specifically, the ionic membrane 15 to be tested is placed between the first holes of the anode electrolytic tank 5 and the cathode electrolytic tank 6, the device is clamped inwards by the screw 13 and the nut 16, the anode electrolytic tank 5 and the cathode electrolytic tank 6 are respectively sealed into two independent chambers by the ionic membrane 15 to be tested, and the liquid inlet 17 and the liquid outlet 18 are respectively connected to an external electrolyte circulating device to form a circulating loop. 300 +/-10 g/L of NaCl solution is respectively injected into the anode electrolytic cell 5, 31.5-32.5% of NaOH solution is injected into the cathode electrolytic cell 6, meanwhile, in order to directly measure the in-situ membrane voltage of the ionic membrane 15 to be measured, agar and saturated potassium chloride solution is filled in the Rujin capillary 7, after the direct current stabilized power supply is electrified, current flows from the anode to the cathode through electrolyte along a lead, cations of the electrolyte in the anode electrolytic cell 5 are exchanged through the ionic membrane 15 to be measured under the action of current, at the moment, contact interfaces exist on two sides of the ionic membrane 15 to be measured, contact potential is generated, and the potential is displayed through the voltmeter 9, namely the in-situ membrane voltage of the ionic membrane 15 to be measured.
After the use is finished, the nuts 16 at the two ends of the screw 13 are unscrewed, the ionic membrane 15 to be tested is taken out, and after the electrolytes in the two cavities are treated, the ionic membrane 15 to be tested can be subjected to in-situ membrane voltage test.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (7)
1. The utility model provides a chlor-alkali ionic membrane in situ membrane voltage testing arrangement, characterized by, be two electrolysis trough of mirror symmetry including the ionic membrane that awaits measuring and the ionic membrane both sides that await measuring, the leading flank of electrolysis trough is opened there are inlet and liquid outlet, the lateral wall of electrolysis trough has inlayed the plate electrode, the inside intercommunication of plate electrode and electrolysis trough, the inside wall of electrolysis trough is opened has the through-hole that supplies electrolyte and the ionic membrane contact that awaits measuring, the through-hole is the same with the plate electrode size and is located same horizontal position, be equipped with the lu jin tubule in the electrolysis trough, just the sharp of lu jin tubule is chewed towards the ionic membrane that awaits measuring, be equipped with the reference electrode in the lu jin tubule, the bottom of reference electrode is located the department of buckling of lu jin tubule, the top of reference electrode is connected with the voltmeter.
2. The apparatus for testing in-situ membrane voltage of chlor-alkali ionic membrane of claim 1 wherein the liquid inlet and the liquid outlet are located below and above the electrode plate, respectively, and the size of the liquid outlet is larger than the size of the liquid inlet.
3. The chlor-alkali ionic membrane in-situ membrane voltage test device of claim 1, wherein said test device further comprises a clamping assembly for clamping and fixing the ionic membrane to be tested, said clamping assembly comprises an end frame disposed outside the electrolytic cell, four screws and nuts used therewith, and the screws respectively penetrate through four corners of the end frame and are fastened by the nuts.
4. The chlor-alkali ionic membrane in-situ membrane voltage test device of claim 3, wherein a sealing gasket is arranged between said end frame and said electrolytic cell.
5. The chlor-alkali ionic membrane in-situ membrane voltage test device of claim 1, further comprising electrode leads for connecting the electrode plates to external power equipment, said electrode leads being connected to the electrode plates through the end frames.
6. The chlor-alkali ionic membrane in-situ membrane voltage test device of claim 5, wherein said electrode leads are divided into anode leads and cathode leads, the anode leads being made of titanium and the cathode leads being made of nickel.
7. The chlor-alkali ionic membrane in-situ membrane voltage test device of claim 5, wherein said electrode leads are fixed to end frames using insulated nuts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123449014.6U CN217324347U (en) | 2021-12-31 | 2021-12-31 | Chlor-alkali ionic membrane in-situ membrane voltage testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123449014.6U CN217324347U (en) | 2021-12-31 | 2021-12-31 | Chlor-alkali ionic membrane in-situ membrane voltage testing device |
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| CN217324347U true CN217324347U (en) | 2022-08-30 |
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| CN202123449014.6U Active CN217324347U (en) | 2021-12-31 | 2021-12-31 | Chlor-alkali ionic membrane in-situ membrane voltage testing device |
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