Gas-liquid separation chamber of large-area ionic membrane electrolytic cell

Abstract

The invention relates to the technical field of ionic membrane electrolyzers, in particular to a gas-liquid separation chamber of a large-area ionic membrane electrolyzer, which comprises a disc body and an ionic membrane which are arranged in parallel, and a liquid separation assembly arranged between the disc body and the ionic membrane, the liquid separation assembly comprises a square shell and a flat plate; the top end of the flat plate is clamped between the disc body and the ionic membrane; the bottom end of one end face, facing the disc body, of the flat plate is connected with the square shell; one surface, facing the tray body, of the square shell is parallel to the inner side surface of the tray body, and a gap between the two surfaces is a side long and narrow channel; wherein an inner cavity of the square shell is a first liquid gathering cavity; a gas-liquid mixture inlet cavity is formed below the square shell; a gas-liquid mixture separation cavity is formed above the square shell; and the gas-liquid mixture inlet cavity, the side long and narrow channel, the gas-liquid mixture separation cavity and the first liquid gathering cavity are communicated in sequence. On the basis of separating the gas from the liquid, the gas and the liquid are isolated, so that the gas and the liquid can be independently treated by rear-end equipment.

Description

Technical Field

[0001] This invention relates to the field of ion-exchange membrane electrolyzer technology, and specifically to a gas-liquid separation chamber of a large-area ion-exchange membrane electrolyzer. Background Technology

[0002] In the chlor-alkali industry, the electrolyzer is the core equipment. Its working principle involves using electric current to drive an electrolyte solution through a redox reaction, generating the target product. In the design of chlor-alkali electrolyzers, the size of the electrolysis area directly affects equipment performance, energy consumption, cost, and the feasibility of large-scale production. Currently, the electrolysis area of ​​the type of cell that accounts for the largest market share is 2.7㎡, with the ion-exchange membrane size correspondingly set; this is defined as the conventional and mature small-area 2.7㎡ cell type. This type of cell is at a certain disadvantage compared to larger-area electrolyzers in terms of single-cell capacity, investment cost amortization, capacity control range, power consumption control range per ton of alkali, economic efficiency, and overall efficiency. The development of the chlor-alkali industry requires continuous energy conservation, emission reduction, cost reduction, and efficiency improvement, which is driving the development of chlor-alkali electrolyzers towards larger electrolysis areas.

[0003] In a chlor-alkali electrolyzer, the gas-liquid separation chamber is located at the top of the cell. The electrolysis product is a gas-liquid mixture. This mixture is discharged into the gas-liquid separation chamber, where gas-liquid separation is completed. The separated gas and liquid are then discharged to the outlet manifold. The design of the gas-liquid separation structure has a certain impact on the gas-liquid separation state and gas-liquid mixing. In different cell types, a suitable gas-liquid separation method will have a better impact on the operation of the electrolyzer. For example, it can reduce the interference of gas-liquid disturbances generated during electrolysis on the ion-exchange membrane, avoiding potential problems such as membrane loosening and friction damage.

[0004] Existing gas-liquid separation chambers typically have a single inlet pipe connected to the bottom of their inlet end, with the other end of the inlet pipe connected to the top of the electrolytic cell. The tail end of the gas-liquid separation chamber is connected to an outlet manifold. The gas-liquid mixture in the electrolytic cell is discharged into the inlet of the gas-liquid separation chamber under pressure. Due to the difference in density between the media in the gas-liquid mixture, as the mixture moves from the inlet to the tail end (vertical movement), the less dense gas rises and the denser liquid sinks, achieving vertical separation of gas and liquid. However, for large-area ion-exchange membrane electrolytic cells, the volume of the gas-liquid mixture is much larger. Without increasing the volume of the gas-liquid separation chamber, a larger volume of gas-liquid mixture results in greater pressure and faster flow velocity at the inlet of the separation chamber. This reduces the residence time of the gas-liquid mixture within the separation chamber (i.e., s=vt), and consequently reduces the time for the liquid to sink. Consequently, the gas-liquid mixture at the tail end is discharged from the gas-liquid separation chamber through the outlet manifold before complete separation (i.e., h=gt). 2 / 2). Traditional gas-liquid separation chambers are insufficient to achieve adequate separation of gas and liquid, affecting the separate processing of gas and liquid by downstream equipment.

[0005] Therefore, there is an urgent need to design a gas-liquid separation structure that can adapt to the gas-liquid mixture volume of a large-area ion-exchange membrane electrolyzer, achieve good gas-liquid separation effect during the discharge process, and ensure smooth gas-liquid discharge with stable and non-turbulent flow. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a gas-liquid separation chamber for a large-area ion membrane electrolyzer, which solves the technical problem that the existing gas-liquid separation chambers are difficult to adapt to large-area ion membrane electrolyzers for sufficient gas-liquid separation.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer of the present invention includes a disk and an ion-exchange membrane arranged in parallel, and a liquid separation assembly disposed between the disk and the ion-exchange membrane; the liquid separation assembly includes a square shell and a flat plate;

[0010] The top of the plate is engaged between the disk body and the ion membrane; the bottom end of the plate facing the disk body is connected to the square shell; the side of the square shell facing the disk body is parallel to the inner side of the disk body, and the gap between them is a narrow side channel.

[0011] The inner cavity of the square shell is a first liquid gathering cavity; the lower part of the square shell is a gas-liquid mixture inlet cavity; the upper part of the square shell is a gas-liquid mixture separation cavity; the gas-liquid mixture inlet cavity, the side narrow channel, the gas-liquid mixture separation cavity and the first liquid gathering cavity are connected in sequence.

[0012] Optionally, the square housing includes a pair of first and second groove plates arranged in parallel along the vertical direction, and a plurality of diversion groove plates arranged in a longitudinal array.

[0013] One side of the first slot plate and the second slot plate are perpendicularly connected to the flat plate, and the other side is connected to the disk body; the first slot plate and the second slot plate are respectively arranged in a longitudinal array with a plurality of first slots and a plurality of second slots, and the first slots and the second slots are both vertically connected.

[0014] Vertically, the diversion slot plate is engaged with the first slot and the second slot; the elongated side channel is a plurality of first through slots formed by the inner side of the disc and the plurality of diversion slot plates.

[0015] Optionally, the first slot plate is provided with a plurality of first slot holes, and the first slot holes are vertically continuous;

[0016] The first trough plate, the flat plate, the second trough plate, the disk body, and the multiple diversion trough plates form a first liquid collection cavity;

[0017] The first liquid gathering chamber, the first slot, and the gas-liquid mixture separation chamber are connected in sequence.

[0018] Optionally, a plurality of the first slots are arranged in a longitudinal array along the center line of the first slot plate.

[0019] Optionally, a vertical plate is provided on the top surface of the first channel plate; a plurality of third slots are arranged in a longitudinal array on the vertical plate, and the third slots are vertically connected; the diversion channel plate is engaged with the third slots;

[0020] A first guide plate with an inclined downward orientation is provided on the side of the upright plate facing the flat plate; a second guide plate with an inclined downward orientation is provided on the side of the flat plate facing the upright plate; the first guide plate is located above or below the second guide plate, so that the upright plate, the first guide plate, the second guide plate, the flat plate and the first slot plate form a guide cavity; the gas-liquid mixture inlet cavity, the guide cavity and the first slot are connected in sequence.

[0021] Optionally, the first guide plate and the second guide plate are provided with a plurality of vertically penetrating drainage holes.

[0022] Optionally, the free end of the first guide plate or the second guide plate, which is vertically positioned close to the first slot plate, is located directly above the first slot hole.

[0023] Optionally, the square housing further includes multiple sealing plates arranged longitudinally in a staggered manner with the multiple diversion channel plates;

[0024] In the longitudinal direction, both the first slot plate and the second slot plate are provided with a plurality of protrusions arranged in an array; the first slot or the second slot is located between a pair of adjacent protrusions in the longitudinal direction.

[0025] The top and / or bottom surfaces of the sealing plate are provided with inserts; the side of the protrusion facing the first liquid gathering cavity is provided with a corresponding slot, and the inserts are inserted into the slots to construct the side of the first liquid gathering cavity near the inner side of the disc as a vertical plane.

[0026] Optionally, the corners of the diversion trough plate are rounded.

[0027] Optionally, the square housing has a plurality of extension blocks arranged longitudinally on the side facing the disc;

[0028] The extension plate abuts against the inner side of the disc body, so that the inner side of the disc body, the square shell and the multiple extension blocks form a multiple vertically penetrating third through slots;

[0029] The top plate of the square shell has multiple second slots along the longitudinal direction; the inner cavity of the square shell is a third liquid gathering cavity; the third liquid gathering cavity, the second slots and the gas-liquid mixture separation cavity are connected in sequence.

[0030] (III) Beneficial Effects

[0031] The beneficial effects of this invention are:

[0032] The flat plate is detachably fixed between the disc and the ion membrane. The detachable connection allows for adjustment of the installation height of the square shell after the extrusion pressure of the external extrusion equipment is removed. This allows for adjustment of the relative volume of the gas-liquid mixture inlet chamber and the gas-liquid mixture separation chamber, thereby improving the adaptability to gas-liquid separation of gas-liquid mixtures of different volumes, and thus improving the adaptability to gas-liquid separation of ion membrane electrolyzers with different electrolysis areas.

[0033] From a horizontal perspective, the gas-liquid mixture of the present invention can perform gas-liquid separation in the horizontal direction. The advantage of horizontal separation is that as long as the liquid is separated from the gas-liquid mixture, the distance between the liquid and the gas-liquid mixture will gradually increase, including the increase in both horizontal and vertical distances. The increase in horizontal distance can further reduce the influence of the gas-liquid mixture or gas on the separated liquid on the basis of the increase in vertical distance, ensuring that the separated liquid can fall naturally and improving the gas-liquid separation effect.

[0034] The falling liquid can fall relatively accurately onto the top plate of the square shell or directly into the first liquid collection chamber. The liquid falling onto the top plate of the square shell will eventually flow into the first liquid collection chamber. Based on the separation of gas and liquid, the gas and liquid are isolated, which makes it easier for the downstream equipment to process the gas and liquid separately.

[0035] Vertically, the narrow, elongated side channel increases the vertical flow velocity of the gas-liquid mixture, expanding its maximum upward path within the gas-liquid separation chamber. This allows the continuously rising gas to be more easily separated from the mixture, achieving highly efficient vertical separation of gas and liquid. Furthermore, the high flow velocity of the gas-liquid mixture exiting through the narrow, elongated side channel enables gas-liquid separation in a shorter time.

[0036] From a longitudinal perspective, firstly, the pressure and longitudinal flow velocity of the gas-liquid mixture flowing out through the narrow side channel are reduced, allowing it to remain in the gas-liquid mixture separation chamber for a longer period, thus providing sufficient time for separation. Secondly, the longitudinal extension of the narrow side channel, compared to the traditional method of the medium entering the gas-liquid separation chamber through a single inlet pipe, allows the medium to enter through a narrow side channel, covering a larger longitudinal space within the gas-liquid separation chamber. Furthermore, the media within the narrow side channel enter the gas-liquid mixture separation chamber simultaneously, reducing the longitudinal pressure difference and improving the stability of the gas-liquid mixture, gas, and liquid movement paths, resulting in more stable gas-liquid separation. Thirdly, the narrow side channel increases the volume of gas-liquid mixture that can enter the gas-liquid mixture separation chamber simultaneously, effectively reducing the internal pressure of the electrolyzer, quickly expelling electrolysis products from the electrolyzer chamber, reducing the interference of gas-liquid disturbances generated during electrolysis on the ion membrane, and demonstrating strong adaptability to large-area ion membrane electrolyzers. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the gas-liquid separation chamber in the longitudinal direction of the present invention;

[0038] Figure 2 This is a schematic diagram of the gas-liquid flow direction in the longitudinal direction of the gas-liquid separation chamber of the present invention;

[0039] Figure 3 This is a schematic diagram showing the gas-liquid flow direction in the horizontal and vertical gas-liquid separation chambers of the present invention;

[0040] Figure 4 This is a schematic diagram of the square shell structure in the first embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the square shell structure in the second embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram showing the connection between the second channel plate and the diversion channel plate of the present invention;

[0043] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0044] Figure 8 This is a schematic diagram of the structure of the first groove plate of the present invention;

[0045] Figure 9 This is a schematic diagram of the structure of the second card slot of the present invention;

[0046] Figure 10 This is a schematic diagram of the flow divider plate of the present invention;

[0047] Figure 11 This is a schematic diagram of the square shell structure in the third embodiment of the present invention;

[0048] Figure 12 This is a schematic diagram of the sealing plate in the fourth embodiment of the present invention;

[0049] Figure 13 This is a schematic diagram of the square shell structure in the fifth embodiment of the present invention.

[0050] Explanation of reference numerals in the attached figures

[0051] 1: Disc body; 11: Gas-liquid mixture inlet chamber; 12: Gas-liquid mixture separation chamber;

[0052] 2: Ion exchange membrane;

[0053] 3: Square shell; 31: First slot plate; 311: First slot; 312: First slot hole; 32: Second slot plate; 321: Second slot; 33: Diverting slot plate; 331: Rounded corner; 34: First liquid collection chamber; 35: Sealing plate; 351: Insert block; 36: Protrusion; 37: Second slot hole; 38: Second liquid collection chamber; 39: Extension block;

[0054] 4: Flat plate; 41: Second guide plate;

[0055] 5: Vertical plate; 51: First guide plate; 511: Drain hole; 52: Guide cavity;

[0056] 6: Narrow side passage. Detailed Implementation

[0057] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0059] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] First embodiment:

[0062] See Figures 1 to 4 This invention provides a gas-liquid separation chamber for a large-area ion-exchange membrane electrolyzer. The gas-liquid separation chamber includes a disk 1 and an ion-exchange membrane 2 arranged in parallel, and a liquid separation component disposed between the disk 1 and the ion-exchange membrane 2. The liquid separation component includes a square shell 3 and a flat plate 4. The top of the flat plate 4 is engaged between the disk 1 and the ion-exchange membrane 2. The bottom end of the flat plate 4 facing the disk 1 is connected to the square shell 3. The side of the square shell 3 facing the disk 1 is parallel to the inner side of the disk 1, and the gap between them is a side narrow channel 6. The inner cavity of the square shell 3 is a first liquid gathering chamber 34. The lower part of the square shell 3 is a gas-liquid mixture inlet chamber 11. The upper part of the square shell 3 is a gas-liquid mixture separation chamber 12. The gas-liquid mixture inlet chamber 11, the side narrow channel 6, the gas-liquid mixture separation chamber 12, and the first liquid gathering chamber 34 are connected in sequence.

[0063] In this embodiment, the horizontal direction is... Figure 3 The left and right directions are shown; the vertical direction is... Figure 2 The left and right directions are shown; the vertical direction is the height direction, that is... Figure 2 and Figure 3 The vertical direction is indicated by the orientation shown. The upper part of the square shell 3 is hollowed out or is configured as a plate with a liquid inlet hole so that the falling liquid can enter the first liquid collection chamber 34.

[0064] The disc 1 is the electrolytic cell disc. Adjacent discs 1 are longitudinally squeezed together by an external extrusion device to fix the ion membrane 2, i.e., to press and fix the edge position of the ion membrane 2. The plate 4 of the present invention is detachably fixed between the disc 1 and the ion membrane 2 by the extrusion force of the external extrusion device, so that the liquid separation component is arranged in an inverted "9" shape between the disc 1 and the ion membrane 2. The detachable connection method allows for adjustment of the installation height of the square shell 3 after the extrusion force of the external extrusion device is removed, thereby correspondingly adjusting the relative volume of the gas-liquid mixture inlet chamber 11 and the gas-liquid mixture separation chamber 12, improving the adaptability to gas-liquid separation of gas-liquid mixtures of different volumes, that is, improving the adaptability to gas-liquid separation of ion membrane electrolytic cells with different electrolysis areas.

[0065] The liquid separation unit is used to assist in the separation of gas-liquid mixtures inside the gas-liquid separation chamber. Figure 2 and Figure 3 The arrows indicate the longitudinal and transverse flow directions of the gas-liquid mixture in the gas-liquid separation chamber. The gas-liquid mixture in the electrolytic cell is pressurized and enters the gas-liquid mixture inlet chamber 11. Due to the closed bottom of the square shell 3, the gas-liquid mixture can only enter the gas-liquid mixture separation chamber 12 through the narrow side channel 6. Based on the "Venturi effect," when the gas-liquid mixture enters the narrow side channel 6 from the large-volume inlet chamber 11, it exhibits a rapid jetting state within the narrow side channel 6, allowing it to quickly enter the gas-liquid mixture separation chamber 12, thereby increasing the vertical flow velocity of the gas-liquid mixture. Inside the gas-liquid mixture separation chamber 12, the gas continues to rise and accumulates above the separation chamber, while the liquid converts kinetic energy into potential energy as it rises. Therefore, it stops rising and falls back after reaching a certain height, achieving effective separation of gas and liquid in the separation chamber. The theoretical vertical separation height of gas and liquid is shown in [reference needed]. Figure 2 The theoretical gas-liquid boundary line is shown. The falling liquid, affected by vertical gravity, lateral inertia, and longitudinal pressure difference, falls onto the top plate of the square shell 3 and flows to the first liquid collection chamber 34, achieving effective isolation of gas and liquid in the gas-liquid separation chamber.

[0066] The gas-liquid mixture flows in from the bottom of the gas-liquid separation chamber and flows vertically upward under the constraint of the diversion trough plate 33 and the disk 1, avoiding disorderly diffusion of the liquid and providing stable flow field conditions for subsequent gas-liquid separation. When the gas-liquid mixture flows to the "gas-liquid mixture separation area", the difference in physical properties between the gas and liquid phases is the core driving force for separation. The density of the gas is much lower than that of the liquid (electrolyte), and it is subject to buoyancy in the fluid. Its buoyancy is greater than its own weight, so it moves vertically upward. Under the influence of the high temperature of 85°C, the gas expands and diffuses and accumulates in the upper space of the gas-liquid separator. At the same time, the density of the electrolyte is significantly higher than that of the gas, and its own weight is greater than the buoyancy. Under its own weight, it will sink downward and move towards the plate 4 driven by the gas-liquid diffusion direction. In the "gas-liquid mixture separation area", a gas phase space at the top and a liquid phase space at the bottom are automatically formed, thereby realizing the gas-liquid separation of the gas-liquid mixture.

[0067] In the horizontal direction, the gas-liquid mixture is separated in the gas-liquid mixture separation chamber 12. Due to the pushing of the gas-liquid mixture, the limiting of the inner side of the disc 1, and the orientation of the outlet collection pipe, the separated liquid can move laterally toward the plate 4, avoiding interference between the falling liquid and the rising gas-liquid mixture, effectively improving the smoothness of gas-liquid separation and reducing the impact of gas-liquid disturbance on the electrolysis process.

[0068] It should be noted that both gas and liquid are discharged into a single outlet manifold from the outlet of the gas-liquid separation chamber. The gas and liquid within the separation chamber can diffuse laterally, thus driving the liquid to move laterally. Optionally, gas and liquid can be discharged separately, with the gas outlet manifold located at... Figure 3 The upper right corner of the gas-liquid mixture separation chamber 12, as shown, controls the discharge direction of the gas at the top of the gas-liquid separation chamber. The gas drives the liquid to move, effectively increasing the driving force for the lateral movement of the liquid. The liquid is then discharged into the liquid outlet collection pipe through the outlet of the gas-liquid separation chamber.

[0069] Compared to traditional gas-liquid separation methods, which involve the gas-liquid mixture moving longitudinally and separating vertically, the gas-liquid mixture of this invention can also be separated laterally. The advantage of lateral separation is that as long as the liquid is separated from the gas-liquid mixture, the distance between the liquid and the gas-liquid mixture gradually increases, including both lateral and vertical distances. The increase in lateral distance can further reduce the influence of the gas-liquid mixture or gas on the separated liquid, ensuring that the separated liquid can fall naturally and improving the gas-liquid separation effect.

[0070] Based on the corresponding model of electrolytic cell, the theoretical gas-liquid boundary height and the location of the first liquid collection chamber 34 on the square shell 3 are set accordingly. This allows the falling liquid to fall more accurately onto the top plate of the square shell 3 or directly into the first liquid collection chamber 34, and the liquid falling onto the top plate of the square shell 3 will eventually flow into the first liquid collection chamber 34. In addition to separating gas and liquid, the gas separation chamber of this invention can also isolate gas and liquid, facilitating separate processing of gas and liquid by downstream equipment.

[0071] Vertically, the elongated side channel 6 increases the vertical flow velocity of the gas-liquid mixture, expanding its maximum vertical upward path within the gas-liquid separation chamber. This allows the continuously rising gas to be more easily separated from the gas-liquid mixture, achieving efficient vertical separation of gas and liquid. Furthermore, the high flow velocity of the gas-liquid mixture exiting through the elongated side channel 6 enables gas-liquid separation in a shorter time, effectively preventing insufficient separation due to short separation times.

[0072] From a longitudinal perspective, firstly, the pressure and longitudinal flow velocity of the gas-liquid mixture flowing out through the narrow side channel 6 are reduced, allowing it to remain in the gas-liquid mixture separation chamber 12 for a longer period, thus providing sufficient time for separation. Secondly, the longitudinal extension of the narrow side channel 6, compared to the traditional method of the medium entering the gas-liquid separation chamber through a single inlet pipe, allows the medium to enter through the narrow side channel 6, covering a larger longitudinal space within the gas-liquid separation chamber. Furthermore, the media within the narrow side channel 6 enter the gas-liquid mixture separation chamber 12 simultaneously, reducing the longitudinal pressure difference and improving the stability of the movement paths of the gas-liquid mixture, gas, and liquid, resulting in more stable gas-liquid separation. Thirdly, the narrow side channel 6 increases the volume of gas-liquid mixture that can enter the gas-liquid mixture separation chamber 12 simultaneously, effectively reducing the internal pressure of the electrolyzer, quickly discharging the electrolysis products from the electrolyzer chamber, reducing the interference of gas-liquid disturbances generated during electrolysis on the ion membrane, and demonstrating strong adaptability to large-area ion membrane electrolyzers.

[0073] Second embodiment:

[0074] like Figures 5 to 10 As shown, the square housing 3 includes a pair of first groove plates 31 and second groove plates 32 arranged vertically in parallel, and multiple diversion groove plates 33 arranged in a longitudinal array. One side of the first groove plate 31 and the second groove plate 32 are vertically connected to the plate 4, and the other side is connected to the disk body 1. Multiple first slots 311 and multiple second slots 321 are correspondingly arranged in a longitudinal array on the first groove plate 31 and the second groove plate 32, and the first slots 311 and the second slots 321 are vertically connected. Vertically, the top and bottom of the diversion groove plate 33 are engaged with the first slots 311 and the second slots 321. The side narrow channel 6 is a plurality of first through slots formed by the inner side of the disk body 1 and the multiple diversion groove plates 33, so as to optimize the side narrow channel 6 into a side narrow hole. Specifically, compared to the first embodiment where the side narrow channel 6 is configured as a pair of parallel surface gaps, the second embodiment where the side narrow channel 6 is composed of multiple arrayed first through slots with gaps between adjacent first through slots, structurally dividing the gas-liquid mixture flowing into the gas-liquid mixture separation chamber 12 one by one to form streams of gas-liquid mixture. Multiple streams can be rapidly injected into the gas-liquid separation chamber without interfering with each other.

[0075] The elongated side channel splits the gas-liquid mixture into multiple streams, further reducing the gap in the elongated side channel 6. This further increases the vertical velocity of the gas-liquid mixture, making it easier for the continuously rising gas to separate from the mixture. It also further reduces the longitudinal velocity, allowing the gas-liquid mixture to remain in the separation chamber 12 for a longer period. Simultaneously, the velocities, pressures, and movement paths of the multiple streams tend to be consistent, which is beneficial for creating a stable longitudinal flow of the gas-liquid mixture and further reduces the impact of gas-liquid disturbances.

[0076] Furthermore, the first groove plate 31 is provided with a plurality of first groove holes 312, and the first groove holes 312 are vertically connected; the first groove plate 31, the flat plate 4, the second groove plate 32, the disk body 1 and the plurality of diversion groove plates 33 form a first liquid gathering cavity 34; the first liquid gathering cavity 34, the first groove holes 312 and the gas-liquid mixture separation cavity 12 are connected in sequence. Specifically, compared to the open top of the square shell 3, a first groove plate 31 is added, and multiple first slots 312 are formed on the first groove plate 31. The first groove plate 31 and the multiple first slots 312 physically block the falling liquid, allowing the falling liquid to have a buffering process before entering the first liquid collecting cavity 34. This reduces the kinetic energy of the falling liquid and prevents it from dripping directly into the first liquid collecting cavity 34. Consequently, it reduces the impact of the falling liquid on the longitudinal flow of the liquid collected at the bottom of the first liquid collecting cavity 34, reduces the amplitude of the "ripples" generated by the falling liquid dripping onto the liquid collected at the bottom of the first liquid collecting cavity 34, and improves the stability of the longitudinal flow of the liquid collected at the bottom. The first groove plate 31 and its first slots 312 also prevent the falling liquid from splashing after dripping into the first liquid collecting cavity 34, such as splashing onto the gas-liquid mixture flowing above the narrow side channel 6, effectively avoiding affecting the gas-liquid separation process of the gas-liquid mixture.

[0077] Optionally, a plurality of first slots 312 are arranged in a longitudinal array along the center line of the first slot plate 31, adjusting the dripping position of the fallen liquid to the center line of the liquid collected at the bottom of the first liquid collecting chamber 34. Even if "ripples" are generated when the fallen liquid drips, the "ripples" are evenly dispersed to the periphery of the liquid collected at the bottom, further improving the stability of the liquid collected at the bottom flowing longitudinally. The first slots 312 may be round holes, so that the fallen liquid can automatically flow to the center position of the liquid collected at the bottom.

[0078] Third embodiment:

[0079] See Figure 11A vertical plate 5 is provided on the top surface of the first channel plate 31; multiple third slots are arranged in a longitudinal array on the vertical plate 5, and the third slots are vertically connected; the diversion channel plate 33 is engaged with the third slots; a first guide plate 51 inclined downward is provided on the side of the vertical plate 5 facing the flat plate 4; a second guide plate 41 inclined downward is provided on the side of the flat plate 4 facing the vertical plate 5; the first guide plate 51 is located above or below the second guide plate 41, so that the vertical plate 5, the first guide plate 51, the second guide plate 41, the flat plate 4 and the first channel plate 31 form a guide cavity 52; the gas-liquid mixture inlet cavity 11, the guide cavity 52 and the first slot hole 312 are connected in sequence. Specifically, based on the second embodiment, the vertical plate 5, the second guide plate 41 and the first guide plate 51 are added, and the vertical dimension of the diversion channel plate 33 is extended. The diversion slot plate 33 is engaged with the third slot, the first slot 311 and the second slot 321 from top to bottom. The multiple diversion slot plates 33 and the inner side of the disk body 1 form multiple second through slots. The multiple second through slots are combined to form a narrow and elongated channel, ensuring that the gas-liquid mixture can be diverted into multiple high-speed flowing branches after the addition of the support plate 5.

[0080] Secondly, a guide cavity 52 is provided above the first trough plate 31. The first guide plate 51 is located above or below the second guide plate 41, and the two are positioned opposite each other and inclined downwards. This makes the cross-section of the guide cavity 52 V-shaped, Z-shaped, Y-shaped, or S-shaped, which can effectively buffer the falling liquid and reduce its kinetic energy. Then, the first trough plate 31 and the first slot 312 provide a second buffer for the falling liquid, which greatly reduces the gas-liquid fluctuations caused by "ripples" and further improves the stability of the longitudinal flow of the liquid gathered at the bottom of the first liquid gathering cavity 34. The installation height of the first guide plate 51 on the vertical plate 5 needs to be set reasonably to ensure that there is a suitable distance between the connecting end of the first guide plate 51 and the top surface of the vertical plate 5, so as to avoid the falling liquid splashing onto the gas-liquid mixture above the narrow side channel 6 after colliding with the first guide plate 51, thus improving the reliability of the guide cavity 52.

[0081] Optionally, the first guide plate 51 and the second guide plate 41 are provided with a plurality of vertically penetrating drainage holes 511. The drainage holes 511 on the guide plates can increase the flow rate of the guide cavity 52 per unit time, thereby improving the adaptability to gas-liquid separation in large-area ion membrane electrolyzers.

[0082] In addition, the free end of the first guide plate 51 or the second guide plate 41, which is vertically positioned close to the first groove plate 31, is located directly above the first groove hole 312. Specifically, the free end of the guide plate close to the first groove plate 31 is vertically positioned directly above the first groove hole 312, so that the liquid dripping from the free end of the guide plate can form "ripples" on the center line of the liquid gathered at the bottom of the first liquid gathering cavity 34, so that the "ripples" are evenly dispersed to the surrounding area of ​​the liquid gathered at the bottom, ensuring the smoothness of the longitudinal flow of the liquid gathered at the bottom.

[0083] Fourth embodiment:

[0084] like Figure 12 As shown, the square housing 3 also includes multiple sealing plates 35 arranged longitudinally and interleaved with multiple diversion channels 33; longitudinally, multiple protrusions 36 are arrayed on both the first channel 31 and the second channel 32; a first slot 311 or a second slot 321 is formed between a pair of adjacent protrusions 36 in the longitudinal direction; an insert 351 is provided on the top and / or bottom surface of the sealing plate 35; a slot (not shown) is correspondingly opened on the side of the protrusion 36 facing the first liquid gathering cavity 34, and the insert 351 is inserted into the slot to construct the side of the first liquid gathering cavity 34 near the inner side of the disc body 1 as a vertical plane, thereby constructing the inner cavity of the square housing 3 as a regular square oral cavity. In this embodiment, the inner cavity of the square housing 3 is the second liquid gathering cavity. Specifically, in the second and third embodiments, see Figure 6 and Figure 7 Inside the first liquid gathering cavity 34, an expansion cavity is formed between the protrusion 36 and the dotted line shown in the figure. The expansion cavity can also be regarded as being formed simultaneously after the first through groove or the second through groove is set. In this embodiment, the expansion cavity is sealed by the sealing plate 35 so that the dotted line shown in the figure and the inner end face of the slot are on the same vertical plane, making the second liquid gathering cavity a regular square oral cavity. This effectively avoids the situation where the liquid inside the first liquid gathering cavity 34 is turbulent because the inner end face of the slot and the inner end face of the protrusion 36 are located on different planes, thus improving the smoothness of the liquid collected at the bottom of the first liquid gathering cavity 34 being discharged.

[0085] Optionally, see again Figure 7The corners of the flow divider plate 33 are rounded 331. The flow divider plate 33 is formed by bending the two ends of a plate, with the corners at the bends being rounded 331. For the outer wall surface of the flow divider plate 33, the rounded corners 331 improve the smoothness of the flow divider plate 33's engagement with the first slot 311 and the second slot 321, ensuring the fixed position accuracy of the flow divider plate 33 during lateral extrusion by the external extrusion equipment, and ensuring that the rounded corners 331 are properly installed in the slots. Of course, the flow divider plate 33 can also be fixed in the slots by welding, bonding, or screwing. For the inner wall surface of the flow divider plate 33, compared to a right-angle structure, the rounded corners 331 improve the smoothness of the corresponding branch flow of the gas-liquid mixture, avoiding or reducing turbulence at the corners.

[0086] Fifth embodiment:

[0087] See Figure 13 On the side of the square shell 3 facing the disk 1, a plurality of extension blocks 39 are arranged longitudinally. The extension blocks 39 abut against the inner side of the disk 1, so that the inner side of the disk 1, the square shell 3, and the plurality of extension blocks 39 form a plurality of vertically penetrating third channels. A plurality of second slots 37 are opened longitudinally on the top plate of the square shell 3. The inner cavity of the square shell 3 is a third liquid gathering chamber 38. The third liquid gathering chamber 38, the second slots 37, and the gas-liquid mixture separation chamber 12 are connected in sequence. Specifically, based on the first embodiment, a plurality of extension blocks 39 are arranged on the side of the square shell 3 facing the disk 1. The free ends of the extension blocks 39 abut against the inner side of the disk 1, so that the inner side of the disk 1, the side of the square shell 3 facing the disk 1, and an adjacent pair of extension blocks 39 form a third channel. The plurality of third channels combine to form a side-narrow channel. The technical effect of the side-narrow channel will not be elaborated further. Compared to the second embodiment, the square shell 3 in this embodiment is fixedly connected to or integrated with multiple extension blocks 39, resulting in higher structural strength. This allows it to adapt to the higher-pressure gas-liquid mixing chamber and improves the stability of multiple branch flows formed at the narrow side channels. Meanwhile, the third liquid converging chamber 38 is a regular square oral cavity. The technical effect of the third liquid converging chamber 38 is consistent with that of the fourth embodiment, but the sealing plate 35 and its assembly / disassembly steps are optimized, resulting in better overall structural strength and flatness, and improving the smoothness of longitudinal liquid flow inside the third liquid converging chamber 38.

[0088] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A gas-liquid separation chamber for a large-area ion-exchange membrane electrolyzer, characterized in that, The gas-liquid separation chamber includes a disk (1) and an ion membrane (2) arranged in parallel, and a liquid separation assembly disposed between the disk (1) and the ion membrane (2); the liquid separation assembly includes a square shell (3) and a flat plate (4). The top of the plate (4) is engaged between the disk body (1) and the ion membrane (2); the bottom end of the plate (4) facing the disk body (1) is connected to the square shell (3); the side of the square shell (3) facing the disk body (1) is parallel to the inner side of the disk body (1), and the gap between the two is a narrow side channel (6). The inner cavity of the square shell (3) is the first liquid gathering cavity (34); the lower part of the square shell (3) is the gas-liquid mixture inlet cavity (11); the upper part of the square shell (3) is the gas-liquid mixture separation cavity (12); the gas-liquid mixture inlet cavity (11), the side narrow channel (6), the gas-liquid mixture separation cavity (12) and the first liquid gathering cavity (34) are connected in sequence.

2. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 1, characterized in that, The square shell (3) includes a pair of first groove plates (31) and second groove plates (32) arranged in parallel along the vertical direction, and multiple diversion groove plates (33) arranged in a longitudinal array. One side of the first slot plate (31) and the second slot plate (32) are perpendicularly connected to the flat plate (4), and the other side is connected to the disk body (1); the first slot plate (31) and the second slot plate (32) are respectively arranged in a longitudinal array with a plurality of first slots (311) and a plurality of second slots (321), and the first slots (311) and the second slots (321) are both vertically connected; Vertically, the diversion slot plate (33) is engaged with the first slot (311) and the second slot (321); the side narrow channel (6) is a plurality of first through slots formed by the inner side of the disc body (1) and the plurality of diversion slot plates (33).

3. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 2, characterized in that, The first slot plate (31) has a plurality of first slot holes (312), and the first slot holes (312) are vertically connected; The first trough plate (31), the flat plate (4), the second trough plate (32), the disk body (1) and the multiple diversion trough plates (33) form a first liquid collection cavity (34); The first liquid collection chamber (34), the first slot (312), and the gas-liquid mixture separation chamber (12) are connected in sequence.

4. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 3, characterized in that, Multiple first slots (312) are arranged in a longitudinal array along the center line of the first slot plate (31).

5. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 4, characterized in that, A vertical plate (5) is provided on the top surface of the first groove plate (31); a plurality of third slots are arranged in a longitudinal array on the vertical plate (5), and the third slots are vertically connected; the diversion groove plate (33) is engaged with the third slots; The upright plate (5) is provided with a first guide plate (51) tilted downward on the side facing the flat plate (4); the flat plate (4) is provided with a second guide plate (41) tilted downward on the side facing the upright plate (5); the first guide plate (51) is located above or below the second guide plate (41) so that the upright plate (5), the first guide plate (51), the second guide plate (41), the flat plate (4) and the first slot plate (31) form a guide cavity (52); the gas-liquid mixture inlet cavity (11), the guide cavity (52) and the first slot (312) are connected in sequence.

6. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 5, characterized in that, The first guide plate (51) and the second guide plate (41) are provided with a plurality of vertically penetrating drainage holes (511).

7. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 5, characterized in that, The free end of the first guide plate (51) or the second guide plate (41) that is vertically positioned close to the first slot plate (31) is located directly above the first slot hole (312).

8. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 4, characterized in that, The square housing (3) also includes multiple sealing plates (35) arranged longitudinally in a staggered manner with the multiple diversion slot plates (33). In the longitudinal direction, a plurality of protrusions (36) are arrayed on both the first slot plate (31) and the second slot plate (32); the first slot (311) or the second slot (321) is located between a pair of adjacent protrusions (36) in the longitudinal direction. The top and / or bottom surfaces of the sealing plate (35) are provided with inserts (351); the protrusion (36) facing the first liquid gathering cavity (34) is provided with a corresponding slot, and the inserts (351) are inserted into the slot to construct the side of the first liquid gathering cavity (34) near the inner side of the disc (1) as a vertical plane.

9. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 2, characterized in that, The corner of the diversion trough plate (33) is rounded (331).

10. The gas-liquid separation chamber of the large-area ion-exchange membrane electrolyzer according to claim 1, characterized in that, The square shell (3) has a plurality of extension blocks (39) arranged longitudinally on the side facing the disk (1). The extension block (39) abuts against the inner side of the disc body (1) so that the inner side of the disc body (1), the square shell (3) and the multiple extension blocks (39) form a multiple vertically penetrating third through slots. The top plate of the square shell (3) has a plurality of second slots (37) along the longitudinal direction; the inner cavity of the square shell (3) is a third liquid gathering cavity (38); the third liquid gathering cavity (38), the second slots (37) and the gas-liquid mixture separation cavity (12) are connected in sequence.

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