CN218026382U - Cathode-anode differential pressure observation device for ion-exchange membrane electrolyzer - Google Patents
Cathode-anode differential pressure observation device for ion-exchange membrane electrolyzer Download PDFInfo
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- CN218026382U CN218026382U CN202221701367.2U CN202221701367U CN218026382U CN 218026382 U CN218026382 U CN 218026382U CN 202221701367 U CN202221701367 U CN 202221701367U CN 218026382 U CN218026382 U CN 218026382U
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Abstract
The utility model relates to a negative and positive pole pressure differential viewing device for ionic membrane electrolysis cell, including first liquid level pipe, second liquid level pipe, wherein, the vertical setting of first liquid level pipe and second liquid level pipe, high parallel and level constitutes the linker with the negative and positive pole room of ionic membrane electrolysis cell, liquid level and the indoor liquid level of positive pole in the first liquid level pipe, liquid level and the indoor liquid level of positive pole in the second liquid level pipe, make the staff can be through the pressure differential of observing the first liquid level pipe and the second liquid level pipe of negative and positive pole pressure differential viewing device, when the liquid level in discovery anode chamber is greater than the cathode chamber liquid level, in time stop pouring into. Simple structure and simple operation.
Description
Technical Field
The utility model relates to the field of electrolytic equipment, in particular to a multipole type natural circulation ionic membrane electrolytic cell in a chlor-alkali process.
Background
An ion membrane electrolyzer, such as a bipolar natural circulation ion membrane electrolyzer described in the new patent CN01259366, is commonly used in the chlor-alkali industry.
The conventional ionic membrane electrolytic cell is mainly composed of a plurality of unit cells, and ionic membranes are sealed between the unit cells by gaskets. And at the position a few millimeters away from the ionic membrane, one side is an anode polar net at the edge of one unit groove, and the other side is a cathode polar net at the edge of the other unit groove.
The anode electrode net is made of titanium and is flat and smooth, and the cathode electrode net is made of nickel and is relatively rough. When the bipolar natural circulation ionic membrane electrolytic cell operates, the liquid level of the anode chamber needs to be controlled to be lower than the cathode chamber all the time, so that the ionic membrane is prevented from being attached to a rough cathode grid due to the difference of liquid pressures on two sides, and further being damaged by the cathode grid, and the ionic membrane is prevented from being broken, and pinholes or membrane vibration is avoided.
The existing multipole type natural circulation ionic membrane electrolytic cell is used for monitoring and controlling the liquid level in a cathode chamber and an anode chamber by adjusting the opening and closing of a discharge valve through a PLC control system. When brine is injected into the ion membrane electrolytic cell, the PLC control system is not started, the liquid level in the electrolytic cell cannot be controlled, and the liquid level is manually controlled. Under the premise of no liquid level reference, water enters the anode chamber in advance due to misoperation, the pressure of the anode chamber is higher than that of the cathode chamber, and the ionic membrane is close to a rough cathode grid to cause damage.
SUMMERY OF THE UTILITY MODEL
The utility model provides a negative and positive pole pressure difference viewing device of ion membrane electrolytic cell, including first liquid level pipe, second liquid level pipe, first connecting pipe and second connecting pipe, first liquid level pipe and second liquid level pipe are vertical to be set up, highly parallel and level, highly greater than the height of ion membrane electrolytic cell; the bottom end of the first liquid level pipe is communicated with one end of the first connecting pipe and comprises a first liquid level pipe, a second liquid level pipe, a first connecting pipe and a second connecting pipe.
The first liquid level pipe and the second liquid level pipe are vertically arranged, the first liquid level pipe is communicated with the bottom end of the anode chamber of the unit groove through a first connecting pipe, and the second liquid level pipe is communicated with the bottom end of the cathode chamber of the unit groove through a second connecting pipe. The top ends of the first liquid level pipe and the second liquid level pipe are opened, and the top ends of the first liquid level pipe and the second liquid level pipe are at least as high as the cathode chamber and the anode chamber of the ion membrane electrolytic cell. The first liquid level pipe and the second liquid level pipe are made of transparent materials.
The bottom end of the first liquid level pipe is provided with a first valve, the bottom end of the second liquid level pipe is provided with a second valve, a third valve is arranged at the joint of the first connecting pipe and the unit groove, and a fourth valve is arranged at the joint of the second connecting pipe and the unit groove.
According to the utility model discloses an embodiment, first liquid level pipe and second liquid level pipe are fixed on the fixed plate, set up the self-adhesion scale on the fixed plate, the self-adhesion scale sets up between first liquid level pipe and second liquid level pipe.
According to the utility model discloses an embodiment, first liquid level pipe and second liquid level pipe top are provided with dustproof cap respectively.
According to the utility model discloses an embodiment, be provided with the buoy in first liquid level pipe and the second liquid level pipe.
According to the utility model discloses an embodiment, first connecting pipe the second connecting pipe communicates with same unit groove.
The utility model provides a negative and positive pole pressure differential viewing device makes the staff can be before the PLC system starts, through the pressure differential of observing negative and positive pole pressure differential viewing device's first liquid level pipe and second liquid level pipe, when the pressure of discovery anode chamber is greater than the cathode chamber pressure, in time stops to pour into, simple structure, easy and simple to handle. The first connecting pipe and the second connecting pipe are connected with the same unit groove, so that the condition that the first connecting pipe and the second connecting pipe are mutually wound and knotted when the unit grooves change in sequence can be avoided. Set up first valve, second valve for when the solution in the unit cell was discharged, the solution in first liquid level pipe and the second liquid level pipe need not discharge, and labour saving and time saving not only can also keep the workshop clean and tidy.
Drawings
FIG. 1 is an explanatory view of an ionic membrane electrolyzer;
FIG. 2 is a diagram illustrating the connection of a cathode-anode differential pressure observation device to an ion membrane electrolyzer;
FIG. 3 is an explanatory view of the unit cell 2 taken along A-A;
FIG. 4 is an illustration of the ionic membrane being subjected to pressure exerted by brine in the cathode compartment and the anode compartment, against the proximity of the anode mesh;
FIG. 5 is a view illustrating the structure of an anode-cathode differential pressure observation device;
FIG. 6 is a diagram illustrating the level of liquid in the cathode-anode differential pressure observation device being flush with the liquid level in the ion membrane electrolyzer.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like elements and techniques of the present invention so that advantages and features of the present invention may be more readily understood when implemented in a suitable environment. The following description is an embodiment of the present invention, and other embodiments related to the claims that are not explicitly described also fall within the scope of the claims.
The ion membrane electrolytic bath is composed of a plurality of unit cells 2, the unit cells 2 are the main components of the ion membrane electrolytic bath, and the plurality of unit cells 2 are erected on a bath frame 3 and aligned.
FIG. 1 is a schematic view showing a cathode-anode differential pressure observation apparatus connected to an ion membrane electrolyzer.
As shown in fig. 1, the cathode-anode differential pressure observation device 1 includes a first liquid level pipe 11, a second liquid level pipe 12, a first connection pipe 13, and a second connection pipe 14. The first connection pipe 13 and the second connection pipe 14 are fixedly connected to the middle of the lower end of one unit tank 2, and a third valve 27 and a fourth valve 28 are provided at the connection.
The first liquid level pipe 11 and the second liquid level pipe 12 are transparent straight pipes, are vertically arranged, are equal in length and are flush in height, and the height of the first liquid level pipe and the height of the second liquid level pipe are larger than that of the ion membrane electrolytic cell. In this embodiment, the first liquid level tube 11 and the second liquid level tube 12 are 2500mm in height, 16mm in outer diameter, 12mm in inner diameter, and 2mm in thickness. The third valve 27 and the fourth valve 28 are pressure valves corresponding to the 27 th and 28 th valves of the Asahi chemical electrolyzer. The first connection pipe 13 and the second connection pipe 14 are flexible pipes, and may be rigid pipes having an articulated connection structure, or a connection structure of a flexible pipe and a rigid pipe.
Fig. 2 is an explanatory view of the unit cell 2 taken alongbase:Sub>A-base:Sub>A.
The unit tank 2 is a rectangular box body, and as shown in fig. 2, the side walls of the left and right sides of the unit tank 2 are provided with a first opening 2101 and a second opening 2102. The partition 2102 is parallel to the left and right side walls, and divides the unit tank 2 into a cathode chamber 2111 and an anode chamber 2112, and the saline in the cathode chamber 2111 and the anode chamber 2112 cannot pass through the partition 2101. A cathode grid 2113 is provided in the first opening 2101 on the cathode chamber 2111 side, and a cathode grid 2114 is provided in the second opening 2102 on the anode chamber 2112 side.
The first connecting pipe 13 is communicated with the anode chamber, and the second connecting pipe 14 is communicated with the cathode chamber.
The first liquid level pipe 11, the first connecting pipe 13 and the anode chamber of the unit tank 2 form a communicating vessel, and the liquid level in the anode chamber 2112 is flush with the liquid level in the first liquid level pipe 11. Similarly, the second liquid level pipe 12, the second connecting pipe 14 and the cathode chamber of the unit tank 2 form a communicating vessel, and the liquid level in the cathode chamber 2111 is flush with the liquid level in the second liquid level pipe 12.
In the ion membrane electrolytic cell, the liquid levels in all the anode chambers are level, and the liquid levels of all the anode chambers in the ion membrane electrolytic cell can be obtained by observing the liquid level in the first liquid level pipe 11. Similarly, the liquid level in all cathode chambers can be known by observing the liquid level in the second liquid level pipe 12. The pressure difference between the cathode chamber and the anode chamber can be obtained by converting the liquid level difference between the cathode chamber and the anode chamber.
The first liquid level pipe and the second liquid level pipe are high-temperature-resistant and transparent hard acrylic pipes, are not easy to age, shrink, change color and deform, and can accurately and clearly display liquid levels.
The ionic membrane electrolytic cell needs to be frequently replaced, the first connecting pipe and the second connecting pipe do not need to be detached when the ionic membrane is replaced (when the unit cell is moved), the first liquid level pipe and the second liquid level pipe cannot be moved by the unit cell, and time and labor are saved.
The first connecting pipe and the second connecting pipe are connected to the same unit groove, so that the condition that the first connecting pipe and the second connecting pipe are mutually wound and knotted when the unit grooves change in sequence can be avoided.
FIG. 3 is an explanatory view of the proximity of the ion membrane to the anode grid under the influence of the cathode-anode differential pressure.
Fig. 3 shows a first unit cell 201 and a second unit cell 202 which are adjacent in an ion membrane electrolyzer.
The first cell groove 201 and the second cell groove 202 are provided with spacers 2002 in parallel to the side wall edges of the spacer, the spacers 2002 sandwiching the ionic membrane 203. The ionic membrane 203 seals the anode chamber 2012 of the first unit cell 201 and the cathode chamber 2021 of the second unit cell 202. The solutions in the cathode chamber 2012 and the anode chamber 2021 cannot flow through the ion membrane, and only a part of ions can pass through the ion membrane.
As shown in fig. 3, the anode grid 2014 of the first unit cell 201 is positioned at the left side of the ion membrane 203, and the cathode grid 2027 of the second unit cell 202 is positioned at the right side of the ion membrane 203.
Since the ionic membrane is a flexible thin film, when the liquid level in the cathode chamber 2021 is higher than that in the anode chamber 2012, the pressure of the liquid in the anode chamber 2012 received by the ionic membrane 203 is lower than that in the cathode chamber 2021, and the ionic membrane 203 bends and deforms to be close to the anode grid 2014. On the contrary, if the liquid level in the anode chamber is higher than that in the cathode chamber, the ion membrane 203 will bend and deform to be close to the cathode grid 2027.
The anode electrode net is made of titanium and is flat and smooth, and the cathode electrode net is made of nickel and is relatively rough. If the ionic membrane is close to the rough cathode grid, the ionic membrane can be cracked, pinholes or membrane vibration can be caused, and the operation of the ionic membrane electrolytic cell can be influenced. Therefore, in order to avoid the situation that the ionic membrane is close to the cathode polar net, the liquid level of the cathode chamber needs to be ensured to be higher than that of the anode chamber.
The staff can clearly see the liquid level condition of the cathode chamber and the anode chamber in the ion membrane electrolytic cell through the cathode-anode differential pressure observation device, and the liquid level of the cathode chamber and the anode chamber can be conveniently adjusted.
Fig. 4 is a structural explanatory view of the cathode-anode differential pressure observation device.
As shown in the drawing, the first liquid level tube 11 and the second liquid level tube 12 are vertically fixed to the fixing plate 15 by a fixing clip 151, and the fixing clip 151 is detachable. In this embodiment, the height of the fixing plate is 3000mm.
The fixed plate 15 is provided with scales, and a self-adhesive graduated scale 1501 is selected for measuring the specific numerical value of the pressure difference. Self-adhesion scale 1501 sets up between first liquid level pipe and second liquid level pipe, and the staff of being convenient for observes the pressure differential of first liquid level pipe and second liquid level pipe. The scale units of the self-adhesive scale 1501 are mH2O.
The first level pipe 11 is provided at the bottom thereof with a first valve 111, and the second level pipe 12 is provided at the bottom thereof with a second valve 121. The first valve 111 and the second valve 121 are plastic drain valves.
The tops of the first liquid level pipe 11 and the second liquid level pipe 12 are respectively provided with a dust cover 16 or a right-angle joint.
When the solution in the unit groove is discharged, the first valve 111 and the second valve 121 are closed, the solution in the first liquid level pipe 11 and the second liquid level pipe 12 does not need to be discharged, time and labor are saved, and the workshop can be kept clean and tidy. Because hold solution in first liquid level pipe 11 and the second liquid level pipe 12 for a long time, adsorb the dust easily, set up dust cover 16 or quarter bend and can avoid the dust to get into.
Still set up buoy 17 in first liquid level pipe 11 and second liquid level pipe 12, buoy 17 uses bright-coloured colour, and the staff of being convenient for observes the ionic membrane liquid level. When the ion membrane electrolytic tank is fed with liquid, the first valve 111, the second valve 121, the third valve 27 and the fourth valve 28 are opened, and the liquid in the ion membrane electrolytic tank is merged with the liquid in the first liquid level pipe 11 through the first connecting pipe 13 and is merged with the liquid in the second liquid level pipe 12 through the second connecting pipe 14.
FIG. 5 is a schematic diagram showing the liquid level in the cathode-anode differential pressure observation apparatus being at the same level as the liquid level in the ion membrane electrolyzer.
As shown in FIG. 5, the liquid level in the first liquid level pipe 11 is level with the liquid level in the anode chamber of each unit cell in the ion membrane electrolyzer, and the liquid level in the second liquid level pipe 12 is the same as the liquid level in the cathode chamber of each unit cell in the ion membrane electrolyzer.
The utility model provides a negative and positive pole pressure differential viewing device makes the staff can be before the PLC system starts, through the pressure differential of observing negative and positive pole pressure differential viewing device's first liquid level pipe and second liquid level pipe, when the pressure of discovery anode chamber is greater than the cathode chamber pressure, in time stops to pour into. The cathode-anode differential pressure observation device has simple structure and simple and convenient operation.
The first connecting pipe and the second connecting pipe are connected with the same unit groove, so that the condition that the first connecting pipe and the second connecting pipe are mutually wound and knotted when the unit grooves change in sequence can be avoided. Set up first valve, second valve for when the solution in the unit cell was discharged, the solution in first liquid level pipe and the second liquid level pipe need not discharge, and labour saving and time saving not only can also keep the clean and tidy in workshop.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (6)
1. A negative and positive pole pressure differential viewing device for ion membrane electrolysis cell, ion membrane electrolysis cell includes a plurality of unit groove (2) of arranging side by side, each unit groove's both sides face is installed respectively negative pole net (2113) and positive pole net (2114), unit groove (2) inside is provided with baffle (2103), will unit groove inside is divided into cathode chamber (2111) and anode chamber (2112),
ion membranes are clamped between the cathode electrode net and the anode electrode net which are adjacent to the cathode electrode net and the anode electrode net between the unit tanks (2), the adjacent cathode chambers and the anode chambers are separated by the clamped ion membranes, the side surface of the unit tank at the outermost side is closed, and the cathode-anode differential pressure observation device is characterized by comprising a first liquid level pipe (11), a second liquid level pipe (12), a first connecting pipe (13) and a second connecting pipe (14),
the first liquid level pipe (11) and the second liquid level pipe (12) are vertically arranged, the first liquid level pipe (11) is communicated with the bottom end of an anode chamber (2112) of the unit groove (2) through a first connecting pipe (13), the second liquid level pipe (12) is communicated with the bottom end of a cathode chamber (2111) of the unit groove (2) through a second connecting pipe (14),
the top ends of the first liquid level pipe (11) and the second liquid level pipe are opened and at least have the same height with the cathode chamber and the anode chamber of the ion membrane electrolytic cell;
the first liquid level pipe (11) and the second liquid level pipe (12) are made of transparent materials.
2. The cathode-anode differential pressure observation device for an ionic membrane electrolysis cell according to claim 1, wherein the bottom end of the first liquid level pipe (11) is provided with a first valve (111), the bottom end of the second liquid level pipe (12) is provided with a second valve (121), the junction of the first connecting pipe (13) and the unit cell is provided with a third valve (27), and the junction of the second connecting pipe and the unit cell is provided with a fourth valve (28).
3. The cathode-anode differential pressure observation device for the ion-exchange membrane electrolyzer of claim 1 or 2, characterized in that the first liquid level tube (11) and the second liquid level tube (12) are fixed on a fixed plate (15), a self-adhesive graduated scale 1501 is provided on the fixed plate (15),
the self-adhesive scale 1501 is disposed between the first level tube and the second level tube.
4. The cathode-anode differential pressure observation device for the ion membrane electrolysis cell according to claim 3, wherein a dust cap (16) is respectively provided above the first liquid level pipe (11) and the second liquid level pipe (12).
5. The apparatus for observing a cathode-anode pressure difference for an ionic membrane electrolysis cell according to claim 3, wherein floats (17) are provided in the first liquid level pipe (11) and the second liquid level pipe (12).
6. The cathode-anode differential pressure observation apparatus for an ionic membrane electrolysis cell according to claim 5, wherein the first connection pipe (13) and the second connection pipe (14) are communicated with the same unit cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221701367.2U CN218026382U (en) | 2022-07-01 | 2022-07-01 | Cathode-anode differential pressure observation device for ion-exchange membrane electrolyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221701367.2U CN218026382U (en) | 2022-07-01 | 2022-07-01 | Cathode-anode differential pressure observation device for ion-exchange membrane electrolyzer |
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| Publication Number | Publication Date |
|---|---|
| CN218026382U true CN218026382U (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221701367.2U Active CN218026382U (en) | 2022-07-01 | 2022-07-01 | Cathode-anode differential pressure observation device for ion-exchange membrane electrolyzer |
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- 2022-07-01 CN CN202221701367.2U patent/CN218026382U/en active Active
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