Gas-liquid separation box structure of membrane polar distance sub-membrane

Abstract

The utility model relates to a gas-liquid separation box structure of a membrane polar distance sub-membrane, which belongs to the field of gas-liquid separation boxes and comprises two box body cover plates which are symmetrically arranged left and right, an anode disc and a cathode disc are arranged between the two box body cover plates in a penetrating manner and are distributed left and right, and a composite plate is arranged between the anode disc and the cathode disc. The anode disc and the cathode disc are both fixedly connected with the composite plate, the anode disc and the left box body cover plate form an anode gas-liquid chamber, the cathode disc and the right box body cover plate form a cathode gas-liquid chamber, an anode sealing face support is arranged at the bottom in the anode gas-liquid chamber, a cathode sealing face support is arranged at the bottom in the cathode gas-liquid chamber, and the anode sealing face support is connected with the cathode sealing face support. According to the utility model, gas is prevented from being accumulated at the ionic membrane, and a small amount of bubbles remained at the ionic membrane can enter the anode gas-liquid chamber and the cathode gas-liquid chamber through the round holes, so that the ionic membrane cannot form a dry area, and the service life of the ionic membrane is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to a gas-liquid separation box structure of a membrane electrode and an electron membrane, belonging to the field of gas-liquid separation boxes. Background Art

[0002] Ion-exchange membrane electrolyzers are essential equipment in the chlor-alkali industry. Advanced cell types are bipolar, natural circulation membrane electrolyzers, consisting of an anode chamber and a cathode chamber. When DC power is supplied, the anode chamber is fed with refined brine, with the output being circulating brine and chlorine. The cathode chamber is fed with a low-concentration NaOH (sodium hydroxide, commonly known as caustic soda) solution, with the output being a 32%wt NaOH solution and hydrogen.

[0003] like Figure 3-4 As shown, during electrolysis in a conventional electrolytic cell, a liquid inlet distribution pipe is provided at the bottom. The gas and liquid mixture generated by electrolysis flows upward through a channel below the upper sealing surface and enters a gas-liquid separation box, forming a preliminary separation state in which gas is at the top and liquid is at the bottom. The gas then flows through a liquid outlet and a hose into a liquid outlet hose. Because chlorine bubbles are relatively large and viscous, a defoamer is provided in the anode gas-liquid chamber. This allows the chlorine bubbles to be flushed with the liquid through the channel below the sealing surface and filtered through the mesh of the defoamer, resulting in a smooth liquid discharge and separation. The liquid level is maintained so that the ion membrane working area is immersed in the liquid and no dry area is formed. Otherwise, intermittent gasping will occur, causing ion membrane vibration and wear. However, for thinner cell types, due to their larger area, the depth of the cathode and anode chambers is shallower than that of other cell types. Especially in the anode chamber, bubbles are easily accumulated under the ion membrane, forming a dry area, thereby damaging the ion membrane, causing membrane pinholes and reduced current efficiency.

[0004] Therefore, there is a need for a gas-liquid separation box structure with a membrane electrode and an ion membrane to avoid the formation of dry areas on the ion membrane and extend the service life of the ion membrane. Summary of the Invention

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a gas-liquid separation box structure of a membrane electrode and an ion membrane is provided to avoid the formation of dry areas of the ion membrane and prolong the service life of the ion membrane.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows: a gas-liquid separation box structure of a membrane-electrode-ion membrane, comprising two box cover plates arranged symmetrically on the left and right, an anode disk and a cathode disk inserted between the two box cover plates, the anode disk and the cathode disk distributed on the left and right, a composite plate provided between the anode disk and the cathode disk, the anode disk and the cathode disk both being fixedly connected to the composite plate, the anode disk and the left box cover plate forming an anode gas-liquid chamber, the cathode disk and the right box cover plate forming a cathode gas-liquid chamber, an anode sealing surface support provided at the bottom of the anode gas-liquid chamber, a cathode sealing surface support provided at the bottom of the cathode gas-liquid chamber, a gap between the right side of the anode sealing surface support and the anode disk forming an anode gas-liquid channel, and a gap between the left side of the cathode sealing surface support and the cathode disk forming a cathode gas-liquid channel;

[0007] A circular hole is provided at the connection between the side of the box cover away from the composite plate and the bottom of the box cover, the left circular hole is connected to the anode gas-liquid chamber, and the right circular hole is connected to the cathode gas-liquid chamber;

[0008] The connection between the side of the box cover away from the composite plate and the bottom of the box cover is a bent structure, and the circular hole is located at the bent structure.

[0009] Preferably, the number of circular holes on the same box body cover is multiple, and the multiple circular holes on the same box body cover are spaced apart from front to back.

[0010] Preferably, a defoamer is provided in the anode gas-liquid chamber.

[0011] Preferably, the anode disk and the cathode disk are both welded and fixed to the composite plate.

[0012] Preferably, the box cover is made of titanium or nickel.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The utility model provides a gas-liquid separation box structure of the membrane electrode and the ion membrane, which prevents gas from accumulating at the ion membrane, and a small amount of bubbles remaining at the ion membrane can enter the anode gas-liquid chamber and the cathode gas-liquid chamber through the circular hole, thereby ensuring that the ion membrane will not form a dry area, and effectively extending the service life of the ion membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a gas-liquid separation box structure of a membrane electrode and an electron membrane in the utility model;

[0016] Figure 2 for Figure 1 A magnified view of part A;

[0017] Figure 3 It is a first structural schematic diagram of the prior art;

[0018] Figure 4 This is a second structural diagram of the prior art.

[0019] Among them: box cover 1, anode disk 2, cathode disk 3, composite plate 4, anode gas-liquid chamber 5, cathode gas-liquid chamber 6, defoamer 7, anode sealing surface support 8, cathode sealing surface support 9, anode gas-liquid channel 10, cathode gas-liquid channel 11, circular hole 12, ion membrane 13, gasket 14. DETAILED DESCRIPTION

[0020] like Figure 1-2 As shown, a gas-liquid separation box structure of a membrane electrode-ion membrane in this embodiment includes two box cover plates 1 arranged symmetrically on the left and right. The box cover plates 1 are made of titanium or nickel. An anode disk 2 and a cathode disk 3 are inserted between the two box cover plates 1. The anode disk 2 and the cathode disk 3 are distributed on the left and right. A composite plate 4 is provided between the anode disk 2 and the cathode disk 3. The anode disk 2 and the cathode disk 3 are both welded and fixed to the composite plate 4. The anode disk 2 and the left box cover plate 1 form an anode gas-liquid chamber 5, and the cathode disk 3 and the right box cover plate 1 form a cathode gas-liquid chamber 6. The anode gas-liquid chamber 5 A defoamer 7 is provided inside, an anode sealing surface support 8 is provided at the bottom of the anode gas-liquid chamber 5, and a cathode sealing surface support 9 is provided at the bottom of the cathode gas-liquid chamber 6. The gap between the right side of the anode sealing surface support 8 and the anode disk 2 forms an anode gas-liquid channel 10, and the gap between the left side of the cathode sealing surface support 9 and the cathode disk 3 forms a cathode gas-liquid channel 11. A circular hole 12 is provided at the connection between the side of the box cover 1 away from the composite plate 4 and the bottom of the box cover 1. The left circular hole 12 is connected to the anode gas-liquid chamber 5, and the right circular hole 12 is connected to the cathode gas-liquid chamber 6;

[0021] There are multiple circular holes 12 on the same box cover 1, and the multiple circular holes 12 on the same box cover 1 are spaced apart from the front to the back;

[0022] The connection between the side of the box cover 1 away from the composite plate 4 and the bottom of the box cover 1 is a bent structure, and the circular hole 12 is located at the bent structure;

[0023] By arranging the anode gas-liquid channel 10 between the anode sealing surface support 8 and the anode disk 2 and the cathode gas-liquid channel 11 between the cathode sealing surface support 9 and the cathode disk 3, since the cell is a membrane-pole-gap structure, the gas generated by electrolysis enters the chamber from the mesh of the cathode electrode mesh and the anode electrode mesh, mixes in the liquid and ascends together, and guides the gas and liquid to go through the bottom of the chamber disk, which can effectively solve the problem of gas accumulation at the ion membrane 13. Among them, the two ion membranes 13 are respectively located on the left side of the anode disk 2 and the right side of the cathode disk 3. There is a gasket 14 between the ion membrane 13 and the box cover 1. The gap between the left ion membrane 13 and the anode disk 2 forms the anode chamber, and the gap between the right ion membrane 13 and the cathode disk 3 forms the cathode chamber. At the same time, because the box cover 1 adopts a bent structure and the circular hole 12 is located at the bent structure, a small amount of bubbles remaining at the ion membrane 13 can enter the anode gas-liquid chamber 5 and the cathode gas-liquid chamber 6 through the circular hole 12, thereby ensuring that the ion membrane 13 does not form a dry area, effectively extending the service life of the ion membrane 13.

[0024] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A gas-liquid separation box structure of a membrane-electrode-ion membrane, comprising two box cover plates (1) arranged symmetrically on the left and right, an anode disk (2) and a cathode disk (3) being inserted between the two box cover plates (1), the anode disk (2) and the cathode disk (3) being distributed on the left and right, a composite plate (4) being arranged between the anode disk (2) and the cathode disk (3), and the anode disk (2) and the cathode disk (3) being fixedly connected to the composite plate (4), characterized in that: The anode disk (2) and the left box cover (1) form an anode gas-liquid chamber (5), and the cathode disk (3) and the right box cover (1) form a cathode gas-liquid chamber (6). The bottom of the anode gas-liquid chamber (5) is provided with an anode sealing surface support (8), and the bottom of the cathode gas-liquid chamber (6) is provided with a cathode sealing surface support (9). The gap between the right side of the anode sealing surface support (8) and the anode disk (2) forms an anode gas-liquid channel (10), and the gap between the left side of the cathode sealing surface support (9) and the cathode disk (3) forms a cathode gas-liquid channel (11). A circular hole (12) is provided at the connection between the side of the box cover (1) away from the composite plate (4) and the bottom of the box cover (1), the left circular hole (12) being in communication with the anode gas-liquid chamber (5), and the right circular hole (12) being in communication with the cathode gas-liquid chamber (6); The connection between the side of the box cover (1) away from the composite plate (4) and the bottom of the box cover (1) is a bent structure, and the circular hole (12) is located at the bent structure.

2. The gas-liquid separation box structure of the membrane electrode and the ion membrane according to claim 1 is characterized in that: The number of circular holes (12) on the same box cover (1) is multiple, and the multiple circular holes (12) on the same box cover (1) are spaced apart from the front to the back.

3. The gas-liquid separation box structure of the membrane electrode and the ion membrane according to claim 1 is characterized in that: A defoamer (7) is provided in the anode gas-liquid chamber (5).

4. The gas-liquid separation box structure of the membrane electrode and the ion membrane according to claim 1, characterized in that: The anode disk (2) and cathode disk (3) are both welded and fixed to the composite plate (4).

5. The gas-liquid separation box structure of the membrane electrode and the ion membrane according to claim 1 is characterized in that: The box cover (1) is made of titanium or nickel.

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