CN216074051U - Diaphragm integrity testing device - Google Patents
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- CN216074051U CN216074051U CN202122482327.5U CN202122482327U CN216074051U CN 216074051 U CN216074051 U CN 216074051U CN 202122482327 U CN202122482327 U CN 202122482327U CN 216074051 U CN216074051 U CN 216074051U
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Abstract
The utility model belongs to the technical field of hydrogen production by electrolyzing water and discloses a diaphragm integrity testing device. Comprises an electrolytic cell and four pressure gauges, wherein a diaphragm is arranged in the electrolytic cell; the diaphragm divides the electrolytic cell into a cathode chamber and an anode chamber; electrolyte inflow and outflow openings are respectively arranged on the cathode chamber and the anode chamber, the electrolyte inflow opening of the cathode chamber is connected with the first pipeline, the outflow opening is connected with the second pipeline, the electrolyte inflow opening of the anode chamber is connected with the third pipeline, and the electrolyte outflow opening of the anode chamber is connected with the fourth pipeline. And the four pressure gauges are arranged on the four pipelines and record the pressure value of the electrolyte flowing through the electrolytic bath. In addition, the device also comprises a liquid storage tank, a flowmeter, a water pump, a sodium ion selective electrode and a frequency converter; the integrity of the diaphragm can be effectively detected, and the damage position of the diaphragm can be judged. When the integrity of the diaphragm is detected, the electrolytic cell does not need to be disassembled, so that the damage to the electrolytic cell body is avoided, and the maintenance cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of hydrogen production by water electrolysis, and particularly relates to a diaphragm integrity testing device.
Background
Hydrogen is an important industrial raw material and is also a clean energy source, and because the chemical property of the hydrogen is active, the abundance of the hydrogen existing in nature is extremely low, the hydrogen cannot be directly obtained, and the hydrogen needs to be prepared by a manual method. The hydrogen can be generated by coal gasification or petroleum cracking, and can also be generated by water electrolysis, under the trend that industrial production and energy conversion and utilization are clean and low-carbon, the yield of hydrogen production by water electrolysis is increased day by day, and the proportion of the total yield of hydrogen is increased day by day. In this context, the size and power of the water electrolysis hydrogen production equipment can be further improved.
The principle of water electrolysis is that direct current is introduced to two conductive polar plates in an electrolytic cell, and water molecules are dissociated into hydrogen and oxygen through oxidation-reduction reaction in an electrochemical process and are separated out at a cathode and an anode respectively. Water electrolysis technologies currently include alkaline water electrolysis and proton exchange membrane electrolysis (PEM) technologies. The alkaline water electrolysis device has low manufacturing cost and is more suitable for large-scale hydrogen production application.
Alkaline electrolyzers generally employ a filter-press bipolar configuration, consisting of a plurality of elementary cells of the same size and configuration connected in series. The small chambers are firmly pressed together through fasteners such as end pressure plates, fastening bolts and the like to form a complete electrolytic cell. The small electrolytic cell as a structural unit consists of a cathode and an anode, a diaphragm and a sealing gasket. The diaphragm is clamped between the cathode plate and the anode plate, the diaphragm generally adopts a microporous permeable membrane, so that the danger caused by mixing of hydrogen and oxygen generated by the cathode and the anode is prevented, the purity of hydrogen and oxygen products is also ensured, meanwhile, the diaphragm allows the permeation of water and hydroxyl ions in the solution, and the exchange of electrolyte between the cathode and the anode in the electrolytic cell is ensured, so that the continuous and stable electrolytic process is maintained. Meanwhile, the resistance of the diaphragm cannot be too high, so that power consumption caused by voltage drop between two sides of the diaphragm is avoided, and the porosity of the diaphragm needs to be as high as possible.
The electrolysis trough circulates in the operation process for a long time in the electrolysis trough, can produce to erode the diaphragm, and the start-stop of alkali lye circulating pump, electrolysis trough circular telegram back product gas all can produce the impact to the diaphragm in addition, take place to break easily, in case break and will lose the effect that separation oxyhydrogen mixes and take place danger. In the prior art, the integrity of the diaphragm can be checked only after the electrolytic cell is disassembled in the process of overhauling the electrolytic cell, along with the continuous increase of the size of the electrolytic cell, the difficulty of disassembling the electrolytic cell is more and more large, a specific field and large machinery are needed, the sealing structure is inevitably damaged when the electrolytic cell is disassembled and an electrolytic cell chamber needs to be opened, and a new sealing gasket is needed in the process of recovering, so the overhauling and maintaining cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for testing the integrity of a diaphragm, which is used for solving the problems of incomplete rupture and high maintenance cost of the diaphragm of an electrolytic cell.
In order to achieve the purpose, the utility model provides the following technical scheme:
a membrane integrity testing device, comprising an electrolytic cell and four pressure gauges, wherein:
a diaphragm is arranged in the electrolytic cell; the diaphragm divides the electrolytic cell into a cathode chamber and an anode chamber; electrolyte inflow and outflow openings are respectively arranged on the cathode chamber and the anode chamber;
the electrolyte inflow opening of the cathode chamber is connected with a first pipeline;
an electrolyte outflow opening of the cathode chamber is connected with a second pipeline;
the electrolyte inflow opening of the anode chamber is connected with a third pipeline;
the electrolyte outflow opening of the anode chamber is connected with a fourth pipeline.
The four pressure gauges comprise a first pressure gauge, a second pressure gauge, a third pressure gauge and a fourth pressure gauge;
the first pressure gauge is arranged on the first pipeline;
the second pressure gauge is arranged on the third pipeline;
the third pressure gauge is arranged on the fourth pipeline;
the fourth pressure gauge is arranged on the second pipeline.
Further, the first pipe includes two electrolyte inflow pipes, wherein
The two electrolyte inflow pipelines comprise an electrolyte inflow main pipeline and an electrolyte inflow branch pipeline, one end of the electrolyte inflow branch pipeline is connected to the electrolyte inflow main pipeline, and the main pipeline is connected with the electrolytic cell.
Further, the device also comprises three liquid storage tanks and three water pumps, wherein
The three liquid storage tanks comprise a first liquid storage tank, a second liquid storage tank and a third liquid storage tank;
the first liquid storage tank is connected to the electrolyte inflow trunk pipeline;
the second liquid storage tank is connected to the electrolyte inflow branch pipeline;
the third liquid storage tank is connected to a third pipeline;
the three water pumps comprise two variable-frequency pumps and a constant-speed pump, and the two variable-frequency pumps comprise a first variable-frequency pump and a second variable-frequency pump; wherein
The first variable frequency pump is arranged on the electrolyte inflow trunk pipeline;
the second variable frequency pump is arranged on the electrolyte inflow branch pipeline;
the constant speed pump is arranged on the third pipeline.
Further, the device also comprises four flow meters;
the four flow meters comprise a first flow meter, a second flow meter, a third flow meter and a fourth flow meter, wherein
The first flowmeter is arranged on the electrolyte inflow trunk pipeline;
the second flowmeter is arranged on the electrolyte inflow branch pipeline;
the third flow meter is arranged on the fourth pipeline;
the fourth flowmeter is arranged on the second pipeline.
Further, the device also comprises an electrode and two frequency converters;
the electrode is arranged on the second pipeline;
the two frequency converters comprise a first frequency converter and a second frequency converter, wherein
The first frequency converter is connected with the first variable frequency pump;
the second frequency converter is connected with the second variable frequency pump.
Further, the first liquid storage tank and the second liquid storage tank are sodium hydroxide solution liquid storage tanks, and the third liquid storage tank is a potassium hydroxide solution liquid storage tank.
Further, the electrode is a sodium ion selective electrode.
Compared with the prior art, the utility model has the advantages that:
1) electrolyte circulation pipelines are arranged on two sides of an electrode plate of the electrolytic cell, pressure gauges are arranged on the pipelines, and the flow rate of the electrolyte flowing through the pipelines is measured, so that the speed of the electrolyte entering and exiting the electrolytic cell can be accurately obtained, and the phenomenon that alkali liquor circulates in the electrolytic cell for a long time in the operation process of the electrolytic cell to scour a diaphragm is effectively avoided; in addition, the problem that the diaphragm is easy to break due to impact of gas produced after the existing alkali liquor circulating pump is started or stopped and the electrolytic cell is electrified, so that the diaphragm is dangerous due to loss of the function of blocking hydrogen and oxygen mixing once the diaphragm breaks is solved;
2) through the sodium ion selective electrode, sodium ions can be accurately selected, and the concentration of the sodium ions is recorded;
3) carry out the integrality through diaphragm integrality testing arrangement to the electrolysis trough diaphragm and detect, need not to disassemble the electrolysis trough, can avoid the destruction to the electrolysis trough body, reduce the cost of maintenance, the testing process can not stained electrolysis trough moreover, does not influence the operating performance of electrode bath.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic structural diagram of a device for testing integrity of a diaphragm according to the present invention.
Wherein: the device comprises an electrolytic bath 1, a first liquid storage tank 2-1, a second liquid storage tank 2-2, a third liquid storage tank 2-3, a first pressure gauge 3-1, a second pressure gauge 3-2, a third pressure gauge 3-3, a fourth pressure gauge 3-4, a first variable frequency pump 4-1, a second variable frequency pump 4-2, a constant speed pump 4-3, a first flowmeter 5-1, a second flowmeter 5-2, a third flowmeter 5-3, a fourth flowmeter 5-4, an electrode 6, a first frequency converter 7-1 and a second frequency converter 7-2.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the utility model. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model.
As shown in fig. 1: a diaphragm integrity testing device comprises an electrolytic cell 1, four pressure gauges, three liquid storage tanks, three water pumps, four flow meters, an electrode 6 and two frequency converters; wherein: a diaphragm is arranged in the electrolytic cell 1; the diaphragm divides the electrolytic cell 1 into a cathode chamber and an anode chamber; electrolyte inflow and outflow openings are respectively arranged on the cathode chamber and the anode chamber; wherein the electrolyte inflow opening of the cathode chamber is connected with the first pipeline, and the electrolyte outflow opening of the cathode chamber is connected with the second pipeline; the electrolyte inflow opening of the anode chamber is connected with the third pipeline, and the electrolyte outflow opening of the anode chamber is connected with the fourth pipeline. The four pressure gauges comprise a first pressure gauge 3-1, a second pressure gauge 3-2, a third pressure gauge 3-3 and a fourth pressure gauge 3-4; wherein, the first pressure gauge 3-1 is arranged on the first pipeline, the second pressure gauge 3-2 is arranged on the third pipeline, the third pressure gauge 3-3 is arranged on the fourth pipeline, and the fourth pressure gauge 3-4 is arranged on the second pipeline. Wherein, first pipeline includes two electrolyte admission pipes, and two electrolyte admission pipes include that electrolyte flows into main road pipeline and electrolyte inflow branch road pipeline, and the one end that electrolyte flowed into the branch road pipeline is connected on electrolyte inflow main road pipeline, and main road pipeline is connected with electrolysis trough 1.
The three liquid storage tanks comprise a first liquid storage tank 2-1, a second liquid storage tank 2-2 and a third liquid storage tank 2-3, the first liquid storage tank 2-1 is connected to the electrolyte inflow trunk pipeline, the second liquid storage tank 2-2 is connected to the electrolyte inflow branch pipeline, and the third liquid storage tank 2-3 is arranged on the third pipeline; wherein the first liquid storage tank 2-1 and the second liquid storage tank 2-2 are sodium hydroxide solution storage tanks, and the third liquid storage tank 2-3 is a potassium hydroxide solution storage tank.
The three water pumps comprise two variable frequency pumps and a constant speed pump 4-3, and the two variable frequency pumps comprise a first variable frequency pump 4-1 and a second variable frequency pump 4-2; wherein, the first variable frequency pump 4-1 is arranged on the electrolyte inflow main pipeline, the second variable frequency pump 4-2 is arranged on the electrolyte inflow branch pipeline, and the constant speed pump (4-3) is arranged on the third pipeline.
The four flow meters comprise a first flow meter 5-1, a second flow meter 5-2, a third flow meter 5-3 and a fourth flow meter 5-4, wherein the first flow meter 5-1 is arranged on the electrolyte inflow trunk pipeline, the second flow meter 5-2 is arranged on the electrolyte inflow branch pipeline, the third flow meter 5-3 is arranged on the fourth pipeline, and the fourth flow meter 5-4 is arranged on the second pipeline. The electrode 6 is arranged on the second pipeline; the two frequency converters comprise a first frequency converter 7-1 and a second frequency converter 7-2, wherein the first frequency converter 7-1 is connected with a first variable frequency pump 4-1; second frequency converter 7-2 the second variable frequency pump 4-2 is connected.
Specifically, the electrolyte in the utility model is sodium hydroxide solution or aqueous solution, the structure of the electrolytic cell 1 is cathode-diaphragm-anode, wherein, the cathode and the diaphragm are hydrogen side, the anode and the diaphragm are oxygen side, the left side is hydrogen side, the flowing direction of the electrolyte is flowing from the left lower part of the electrolytic chamber to the right upper part; the right side is the oxygen side, and the electrolyte flows in from the bottom right and out from the top left.
More specifically, an electrolyte inflow port and an electrolyte inflow pipeline are respectively arranged on the cathode plate of the cathode chamber on the left side of the electrolytic cell 1, an electrolyte inflow port is arranged on the electrolyte inflow port and is used for allowing electrolyte to enter the first pipeline, an electrolyte outflow port is arranged on the electrolyte inflow port and is used for allowing electrolyte to flow in and out the second pipeline, an electrolyte inflow port and an electrolyte inflow third pipeline are arranged on the anode plate of the anode chamber, and an electrolyte outflow port and an electrolyte outflow fourth pipeline are arranged. The first pipeline is divided into an inflow pipeline and an electrolyte inflow main pipeline and an electrolyte inflow branch pipeline, a first liquid storage tank 2-1, a first flowmeter 5-1, a first variable frequency pump 4-1, a first pressure gauge 3-1 and a first frequency converter 7-1 connected to the first variable frequency pump 4-1 are sequentially arranged on the main pipeline according to the flowing direction of the electrolyte, and a second liquid storage tank 2-2, a second flowmeter 5-2, a second variable frequency pump 4-2 and a second frequency converter 7-2 connected to the second variable frequency pump 4-2 are connected to the branch pipeline. The second pipeline is connected with a fourth pressure gauge 3-4, a sodium ion selective electrode 6 and a fourth flowmeter 5-4; the third pipeline is connected with a third liquid storage tank 2-3, a constant speed pump 4-3 and a second pressure gauge 3-2, and the fourth pipeline is connected with a third pressure gauge 3-3 and a third flow meter 5-3.
2-1, 2-2 and 2-3 are liquid storage tanks, 2-1 and 2-2 are positioned at the inlet end of a hydrogen side flow channel of the electrolytic cell, 2-3 is positioned at the inlet end of an oxygen side flow channel, namely the side of a cathode chamber is a hydrogen side, the side of an anode chamber is an oxygen side, sodium hydroxide alkali solution with the mass percentage concentration of 0.1-10% is contained in 2-1 and 2-2, the solution with the mass percentage concentration of 2-2 is 2-10 times of that of the solution in 2-1, potassium hydroxide alkali solution with the mass percentage concentration of 0.1% to saturated solution is contained in 2-3, and the concentration of hydroxyl is consistent with that of the 2-1 medium alkali solution;
when testing the membrane using the membrane integrity device: the electrolytic tank 1 to be tested is filled with potassium hydroxide solution with the concentration consistent with that of the solution in the step 2-3, and the testing device is connected with the electrolytic tank 1. Starting the first variable frequency pump 4-1 and the constant speed pump 4-3, adjusting the pump speeds of the first variable frequency pump 4-1 and the constant speed pump 4-3 to be the same, and enabling the readings of the first pressure gauge 3-1 and the second pressure gauge 3-2 to be approximate and the readings of the third pressure gauge 3-3 and the fourth pressure gauge 3-4 to be approximate. Recording the flow rates in a third flow meter 5-3 and a fourth flow meter 5-4 of a hydrogen side flow channel and an oxygen side flow channel of the electrolytic cell, and reading the stable value of the sodium ion concentration in the sodium ion selective electrode 6 (the fluctuation of the sodium ion concentration is less than 0.5 percent of the average value within 3 minutes) after the fluctuation of the reading of the flow rates of the third flow meter 5-3 and the fourth flow meter 5-4 is less than 1 percent; and then starting the second variable frequency pump 4-2, adjusting the second frequency converter 7-2 to ensure that the flow rate of the second flowmeter 5-2 at the outlet of the second variable frequency pump 4-2 is increased to 10% -100% of the flow rate of the first flowmeter 5-1 at a constant speed from 0, and simultaneously adjusting the first frequency converter 7-1 to ensure that the flow rate of the first flowmeter 5-1 at the outlet of the variable frequency pump 4-1 is kept unchanged. And recording the flow rate change curves of the third flowmeter 5-3 and the fourth flowmeter 5-4 and the sodium ion concentration change curve of the sodium ion selective electrode 6. If the slope of the change curve of the sodium ion concentration deviates more than 20% from the slope of the change curve of the pump speed of the second variable frequency pump 4-2, the diaphragm of the electrolytic cell 1 is damaged.
According to the volume V of the electrolytic cell 1 and the flow rate S of the flowmeter 5-4, the time for the liquid to flow through the whole electrolytic cell is T0-V/S. The above results show that the position where the diaphragm is broken is at the position T1/T0 from the total length of the inlet cell at the pressure table 3-1, based on the time point T1 of the change in the slope of the curve of the change in the sodium ion concentration.
Example 1:
setting the electrolysis diameter of an electrolytic cell 1 in a diaphragm integrity testing device to be 1.5 m; the mass percentage concentration of the sodium hydroxide solution in the first liquid storage tank 2-1 containing the sodium hydroxide solution is set to be 1%, the mass percentage concentration of the sodium hydroxide solution in the second liquid storage tank 2-2 containing the sodium hydroxide solution is set to be 5%, and the mass percentage concentration of the potassium hydroxide solution in the third liquid storage tank 2-3 containing the potassium hydroxide solution is set to be 1.4%. And after the electrolytic tank 1 to be tested is filled with the potassium hydroxide solution with the mass percentage concentration of 1.4%, the testing device is connected with the electrolytic tank 1. When testing the integrity of the separator: starting the variable frequency pump 4-1 and the constant speed pump 4-3, adjusting the pump speed of the first variable frequency pump 4-1 to be the same as that of the constant speed pump 4-3, wherein the pump speeds are 15m3And h, enabling the readings of the first pressure gauge 3-1 and the second pressure gauge 3-2 to be close, and enabling the readings of the third pressure gauge 3-3 and the fourth pressure gauge 3-4 to be close. The flow rates in the third flow meter 5-3 and the fourth flow meter 5-4 on the hydrogen-side and oxygen-side pipes of the electrolytic cell 1 were recorded, and after the fluctuation of the readings of the flow rates in the third flow meter 5-3 and the fourth flow meter 5-4 was less than 1%, the steady value of the sodium ion concentration in the sodium ion-selective electrode 6 was read at 500ppm (the fluctuation of the sodium ion concentration in 3 minutes was less than 0.5% of the average). The second variable frequency pump 4-2 is started, and the second frequency converter 7-2 is adjusted to enable the second frequency converter to beThe flow rate of the second flowmeter 5-2 at the outlet of the second variable frequency pump 4-2 is increased from 0 to 10 percent of the flow rate of the first flowmeter 5-1 at a constant speed, and the first frequency converter 7-1 is adjusted at the same time, so that the flow rate of the first flowmeter 5-1 at the outlet of the first variable frequency pump 4-1 is kept unchanged.
And recording the flow speed change curves of the third flow meter 5-3 and the fourth flow meter 5-4 and the sodium ion concentration change curve of the sodium ion selective electrode 6. If the slope of the change curve of the sodium ion concentration deviates more than 40% from the slope of the change curve of the pump speed of the second variable frequency pump 4-2, the diaphragm of the electrolytic cell 1 is damaged.
According to the 1 volume 3m of the electrolytic cell3Fourth flowmeter 5-4 flow velocity 15m3The time for the liquid to flow through the whole cell was 720 s. The time point of the change in the slope of the sodium ion concentration curve was 72 seconds, and it was found that the position where the diaphragm was broken was 1/10 from the total length of the inlet electrolytic cell 1 in Table 3-1.
Example 2:
setting the electrolysis diameter of an electrolytic cell 1 in a diaphragm integrity testing device to be 1.2 meters; and the mass percentage concentration of the sodium hydroxide solution in the first liquid storage tank 2-1 for containing the sodium hydroxide solution is set to be 2%, the mass percentage concentration of the sodium hydroxide solution in the second liquid storage tank 2-2 for containing the sodium hydroxide solution is set to be 8%, and the mass percentage concentration of the potassium hydroxide solution in the third liquid storage tank 2-3 for containing the potassium hydroxide solution is set to be 2.8%. And after the electrolytic tank 1 to be tested is filled with the potassium hydroxide solution with the mass percentage concentration of 2.8%, the testing device is connected with the electrolytic tank 1. When the integrity of the diaphragm is tested, the first variable frequency pump 4-1 and the constant speed pump 4-3 are started, the pump speed of the first variable frequency pump 4-1 is adjusted to be the same as that of the constant speed pump 4-3, and the pump speed and the constant speed pump are both 10m3And h, enabling the readings of the first pressure gauge 3-1 and the second pressure gauge 3-2 to be close, and enabling the readings of the third pressure gauge 3-3 and the fourth pressure gauge 3-4 to be close. Recording the flow rates in the third flow meter 5-3 and the fourth flow meter 5-4 in the hydrogen side and the oxygen side flow channels of the electrolytic cell 1, and reading the stable value of the sodium ion concentration in the sodium ion selective electrode 6 of 1200ppm (the fluctuation of the sodium ion concentration is less than 0.5 percent of the average value in 3 minutes) after the fluctuation of the flow rate readings of the third flow meter 5-3 and the fourth flow meter 5-4 is less than 1 percent.
And starting the second variable frequency pump 4-2, adjusting the second frequency converter 7-2 to ensure that the flow rate of the second flowmeter 5-2 at the outlet of the second variable frequency pump 4-2 is increased to 20% of the flow rate of the first flowmeter 5-1 at a constant speed from 0, and simultaneously adjusting the first frequency converter 7-1 to ensure that the flow rate of the first flowmeter 5-1 at the outlet of the first variable frequency pump 4-1 is kept unchanged. And recording the flow speed change curves of the third flow meter 5-3 and the fourth flow meter 5-4 and the sodium ion concentration change curve of the sodium ion selective electrode 6.
If the slope of the change curve of the sodium ion concentration deviates more than 35% from the slope of the change curve of the pump speed of the second variable frequency pump 4-2, the diaphragm of the electrolytic cell 1 is damaged. According to the 1 volume 2m of the electrolytic cell3Fourth flowmeter 5-4 flow velocity 10m3The time for the liquid to flow through the whole cell 1 was 720 s. The time point of the slope change of the change curve of the sodium ion concentration is 360s, and the position of the damaged diaphragm is 1/2 from the total length of the inlet electrolytic tank 1 at the first pressure gauge 3-1.
Compared with the prior art, the utility model can only check the integrity of the diaphragm after the electrolytic cell 1 is disassembled in the process of overhauling the electrolytic cell 1; and along with the continuous increase of the size of electrolysis trough 1, the degree of difficulty of disassembling electrolysis trough 1 is bigger and bigger, needs specific place and large-scale machinery, and disassemble electrolysis trough 1 need open the inevitable seal structure that will destroy of electrolysis cell, need use new seal gasket among the recovery process moreover, therefore overhaul and the cost of maintaining are higher.
It will be appreciated by those skilled in the art that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the utility model are intended to be embraced therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the utility model without departing from the spirit and scope of the utility model, which is to be covered by the claims.
Claims (7)
1. A membrane integrity testing device, characterized in that it comprises an electrolytic cell (1) and four pressure gauges, wherein:
a diaphragm is arranged in the electrolytic cell (1); the diaphragm divides the electrolytic cell (1) into a cathode chamber and an anode chamber; electrolyte inflow and outflow openings are respectively arranged on the cathode chamber and the anode chamber;
the electrolyte inflow opening of the cathode chamber is connected with a first pipeline;
an electrolyte outflow opening of the cathode chamber is connected with a second pipeline;
the electrolyte inflow opening of the anode chamber is connected with a third pipeline;
the electrolyte outflow opening of the anode chamber is connected with a fourth pipeline;
the four pressure gauges comprise a first pressure gauge (3-1), a second pressure gauge (3-2), a third pressure gauge (3-3) and a fourth pressure gauge (3-4);
the first pressure gauge (3-1) is arranged on the first pipeline;
the second pressure gauge (3-2) is arranged on the third pipeline;
the third pressure gauge (3-3) is arranged on the fourth pipeline;
and the fourth pressure gauge (3-4) is arranged on the second pipeline.
2. The membrane integrity test device of claim 1, wherein the first conduit comprises two electrolyte inflow conduits, wherein:
the two electrolyte inflow pipelines comprise an electrolyte inflow main pipeline and an electrolyte inflow branch pipeline, one end of the electrolyte inflow branch pipeline is connected to the electrolyte inflow main pipeline, and the main pipeline is connected with the electrolytic cell (1).
3. The membrane integrity testing device of claim 1, further comprising three fluid reservoirs and three water pumps, wherein:
the three liquid storage tanks comprise a first liquid storage tank (2-1), a second liquid storage tank (2-2) and a third liquid storage tank (2-3);
the first liquid storage tank (2-1) is connected to an electrolyte inflow trunk pipeline;
the second liquid storage tank (2-2) is connected to the electrolyte inflow branch pipeline;
the third liquid storage tank (2-3) is connected to a third pipeline;
the three water pumps comprise two variable-frequency pumps and a constant-speed pump (4-3), and the two variable-frequency pumps comprise a first variable-frequency pump (4-1) and a second variable-frequency pump (4-2);
the first variable frequency pump (4-1) is arranged on the electrolyte inflow trunk pipeline;
the second variable frequency pump (4-2) is arranged on the electrolyte inflow branch pipeline;
the constant speed pump (4-3) is arranged on the third pipeline.
4. The membrane integrity testing device of claim 1, further comprising four flow meters;
the four flow meters comprise a first flow meter (5-1), a second flow meter (5-2), a third flow meter (5-3) and a fourth flow meter (5-4), wherein
The first flowmeter (5-1) is arranged on the electrolyte inflow trunk pipeline;
the second flowmeter (5-2) is arranged on the electrolyte inflow branch pipeline;
the third flow meter (5-3) is arranged on the fourth pipeline;
the fourth flowmeter (5-4) is arranged on the second pipeline.
5. A membrane integrity testing device according to claim 3, characterized in that said device further comprises an electrode (6) and two frequency converters;
the electrode (6) is arranged on the second pipeline;
the two frequency converters comprise a first frequency converter (7-1) and a second frequency converter (7-2), wherein
The first frequency converter (7-1) is connected with the first variable frequency pump (4-1);
the second frequency converter (7-2) is connected with the second variable frequency pump (4-2).
6. A membrane integrity testing device according to claim 3, wherein said first (2-1) and second (2-2) reservoirs are sodium hydroxide solution reservoirs and said third reservoir (2-3) is a potassium hydroxide solution reservoir.
7. A membrane integrity test device according to claim 5, characterized in that said electrode (6) is a sodium ion selective electrode.
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|---|---|---|---|
| CN202122482327.5U CN216074051U (en) | 2021-10-14 | 2021-10-14 | Diaphragm integrity testing device |
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| CN202122482327.5U CN216074051U (en) | 2021-10-14 | 2021-10-14 | Diaphragm integrity testing device |
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| CN216074051U true CN216074051U (en) | 2022-03-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789546A (en) * | 2021-10-14 | 2021-12-14 | 中国华能集团清洁能源技术研究院有限公司 | Diaphragm integrity testing system and using method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789546A (en) * | 2021-10-14 | 2021-12-14 | 中国华能集团清洁能源技术研究院有限公司 | Diaphragm integrity testing system and using method |
| CN113789546B (en) * | 2021-10-14 | 2024-03-26 | 中国华能集团清洁能源技术研究院有限公司 | Diaphragm integrity test system and use method |
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