Bidirectional parallel multi-stage sealing device for seawater phase change mass transfer device and preparation method thereof

Abstract

This invention belongs to the technical field of seawater phase change mass transfer devices, and specifically relates to a bidirectional parallel multi-stage sealing device and its preparation method for seawater phase change mass transfer devices. The invention includes an upper sealing plate, a lower sealing plate, and several support columns connecting the upper and lower sealing plates. A lifting mechanism is installed on the upper sealing plate, and a lifting plate is connected to the output end of the lifting mechanism. A cooling pressure plate is disposed on the side of the lifting plate facing the lower sealing plate, and a cooling pressure receiving plate is disposed on the side of the lower sealing plate facing the lifting plate. Both the cooling pressure plate and the cooling pressure receiving plate have embedded heat-conducting metal sheets and flow channels. Polytetrafluoroethylene (PTFE) patches are attached to the surfaces of both the cooling pressure plate and the cooling pressure receiving plate. A lower hydrophobic and breathable mass transfer membrane is placed on the PTFE patch of the cooling pressure receiving plate, a seawater phase change mass transfer flow channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer flow channel plate. This invention provides a bidirectional parallel multi-stage sealing device and its preparation method for seawater phase change mass transfer devices.

Description

Technical Field

[0001] This invention belongs to the technical field of seawater phase change mass transfer devices, and specifically relates to a bidirectional parallel multi-stage sealing device and its preparation method for seawater phase change mass transfer devices. Background Technology

[0002] The sealing performance between the hydrophobic and breathable mass transfer membrane and the mass transfer channel plate of the seawater phase change mass transfer device is crucial to ensuring complete isolation of seawater impurity ions from the electrolyte. Existing thermo-press sealing equipment can typically only perform thermo-press sealing on one side of the seawater phase change mass transfer device. Therefore, the traditional process requires two operations: first, thermo-press sealing on one side, and then flipping the plate over to perform thermo-press sealing on the other side.

[0003] This method is not only cumbersome to operate, but also makes it difficult to keep the stress on the board consistent during the two hot pressing processes. This can easily cause the board to bend and deform due to uneven pressure on both sides, which in turn affects the installation and use of the device.

[0004] Meanwhile, existing equipment often cannot guarantee the parallelism of the hot-pressing plates during the hot-pressing process, further leading to uneven distribution of pressure and temperature. Excessively high local temperatures may cause degradation of the membrane material, thereby affecting the membrane's air permeability, strength, and other physical properties; while excessively low temperatures will not achieve a good sealing effect. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the existing technology, the purpose of this invention is to provide a bidirectional parallel multi-stage sealing device and preparation method for seawater phase change mass transfer device.

[0006] The technical solution adopted in this invention is as follows:

[0007] A bidirectional parallel multi-stage sealing device for seawater phase change mass transfer includes an upper sealing plate, a lower sealing plate, and several support columns connecting the upper and lower sealing plates. A lifting mechanism is installed on the upper sealing plate, and a lifting plate is connected to the output end of the lifting mechanism. A cooling pressure plate is provided on the side of the lifting plate facing the lower sealing plate, and a cooling pressure plate is provided on the side of the lower sealing plate facing the lifting plate. Both the cooling pressure plate and the cooling pressure plate are embedded with heat-conducting metal sheets for heating and flow channels for cooling the heat-conducting metal sheets. Polytetrafluoroethylene patches are attached to the surfaces of both the cooling pressure plate and the cooling pressure plate.

[0008] During the pressing process, a lower hydrophobic and breathable mass transfer membrane is placed on the polytetrafluoroethylene patch of the cooling pressure plate, a seawater phase change mass transfer channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer channel plate.

[0009] The bidirectional parallel multi-stage sealing device for seawater phase change mass transfer devices of the present invention, through its bidirectional operation design, enables the hot-press sealing of both sides in a single operation, and seals and molds the seawater phase change mass transfer device on both sides in one go. This avoids the cumbersome process of flipping and hot-pressing multiple times in traditional processes, greatly improving production efficiency and reducing operation steps and labor intensity.

[0010] This invention utilizes a lifting mechanism and several supporting columns to ensure the vertical movement of the cooling pressure plate, thereby ensuring the parallelism between the cooling pressure plate and the seawater phase change mass transfer channel plate. This, in turn, ensures uniform pressing of the upper and lower sides of the seawater phase change mass transfer channel plate against the hydrophobic and breathable mass transfer membrane. Embedded heat-conducting metal sheets ensure uniform heating of the hot-pressing area between the seawater phase change mass transfer channel plate and the hydrophobic and breathable mass transfer membrane, achieving a tight and uniform connection between the two. Through its rational structural and material design, this invention effectively avoids the problems of bending deformation of the channel plate and performance degradation of the membrane material caused by uneven pressure and temperature.

[0011] As a preferred embodiment of the present invention, a linear bearing is sleeved on the support column, and the linear bearing is fixed to the lifting plate.

[0012] As a preferred embodiment of the present invention, a reset positioner is fixed on the side of the upper sealing plate facing the lifting plate.

[0013] In a preferred embodiment of the present invention, a parallelism reinforcing beam is provided on the lifting plate. The parallelism reinforcing beam and the reset positioner effectively improve the parallelism and shape stability of the cooling pressure plate. Replacing the traditional carbon steel heat-conducting strip with a copper-based heat-conducting metal sheet further avoids uneven pressure and temperature distribution on the plate.

[0014] As a preferred embodiment of the present invention, the present invention also includes an all-solid-state induction heater, which is electrically connected to a heat-conducting metal sheet.

[0015] As a preferred embodiment of the present invention, the present invention further includes a chiller, which is connected to the flow channel of the cooling pressure plate and the flow channel of the cooling pressure plate through pipes respectively.

[0016] As a preferred embodiment of the present invention, the lifting mechanism is a cylinder, the cylinder barrel is mounted on the upper sealing plate, and the piston rod of the cylinder is fixed to the lifting plate.

[0017] A method for fabricating a seawater phase change mass transfer device includes the following steps:

[0018] S1: A lower hydrophobic and breathable mass transfer membrane is placed on the polytetrafluoroethylene patch of the cooling pressure plate, a seawater phase change mass transfer channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer channel plate.

[0019] S2: After the lifting mechanism is started, the cooling pressure plate is pressed down vertically to press the seawater phase change mass transfer channel plate and the hydrophobic and breathable mass transfer membrane together. The pressure is controlled by adjusting the lifting mechanism to apply pressure to the seawater phase change mass transfer channel plate and the hydrophobic and breathable mass transfer membrane. The heat-conducting metal sheets in the cooling pressure plate and the cooling pressure plate are controlled by frequency conversion to make the temperature of the heat-conducting metal sheets in the cooling pressure plate and the cooling pressure plate rise synchronously and uniformly.

[0020] S3: Preheat once to allow the polymer molecular chains of the hydrophobic and breathable mass transfer membrane to penetrate into the polytetrafluoroethylene composite layer; then heat to the melting temperature of the hydrophobic and breathable mass transfer membrane and the seawater phase change mass transfer channel plate and maintain for a period of time, then stop heating;

[0021] S4: By controlling the output flow rate of cooling water, uniform cooling of the pressure plate and the pressure plate is achieved, preventing the accumulation of internal stress in the seawater phase change mass transfer device caused by excessive cooling.

[0022] S5: After the first cooling to room temperature, both sides are reheated to complete the second annealing, eliminating some internal stress;

[0023] S6: Finally, the entire system is cooled to room temperature. After the cooling pressure plate is lifted by the lifting mechanism, it returns to the initial position, thus completing the multi-stage sealing of the seawater phase change mass transfer device.

[0024] As a preferred embodiment of the present invention, in step S2, the heat-conducting metal sheets inside the pressure plate and the pressure receiving plate are cooled by frequency conversion control of the all-solid-state induction heating machine.

[0025] As a preferred embodiment of the present invention, in step S6, after the cooling pressure plate is lifted by the lifting mechanism, it returns to the initial position according to the reset positioner, and the reset positioner corrects the shape of the cooling pressure plate again.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention, through its bidirectional operation design, can seal and mold a double-sided seawater phase change mass transfer device in one go, avoiding the traditional process of first hot-pressing one side and then flipping it over to hot-press the other side, thus significantly improving production efficiency and ease of operation.

[0028] 2. The bidirectional simultaneous heating and cooling design of this invention synchronizes the heating and cooling processes on both sides of the seawater phase change mass transfer device, thereby balancing the distribution of residual internal stress and reducing the deformation of the seawater phase change mass transfer device.

[0029] 3. By using a copper-based thermally conductive metal sheet with higher thermal conductivity, this invention further improves the thermal conductivity efficiency of the heating process and ensures a more uniform temperature distribution in the hot-pressing process of the seawater phase change mass transfer device.

[0030] 4. The present invention maintains a more stable shape of the cooling pressure plate by setting a parallelism reinforcing beam and a reset positioner, ensuring the parallelism between the cooling pressure plate and the cooling pressure plate, thereby resulting in a more uniform pressure distribution. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is the front view of the present invention.

[0033] In the diagram: 1-Cylinder; 2-Upper sealing plate; 3-Lower sealing plate; 4-Support column; 5-Linear bearing; 6-Reset positioner; 7-Cooling pressure plate; 8-Cooling pressure plate; 9-Parallelism reinforcing beam; 10-PTFE patch; 11-All-solid-state induction heater; 12-Chiller; 13-Heat-conducting metal sheet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the invention can be combined with each other.

[0036] like Figure 1 and Figure 2 As shown, the bidirectional parallel multi-stage sealing device for seawater phase change mass transfer in this embodiment includes an upper sealing plate 2, a lower sealing plate 3, and several support columns 4 connecting the upper sealing plate 2 and the lower sealing plate 3. A lifting mechanism is installed on the upper sealing plate 2, and a lifting plate is connected to the output end of the lifting mechanism. A cooling pressure plate 8 is provided on the side of the lifting plate facing the lower sealing plate 3, and a cooling pressure plate 7 is provided on the side of the lower sealing plate 3 facing the lifting plate. Both the cooling pressure plate 8 and the cooling pressure plate 7 have embedded heat-conducting metal sheets 13 for heating and flow channels for cooling the heat-conducting metal sheets 13. Polytetrafluoroethylene patches 10 are attached to the surfaces of both the cooling pressure plate 8 and the cooling pressure plate 7. A linear bearing 5 is sleeved on the support column 4, and the linear bearing 5 is fixed to the lifting plate.

[0037] During the pressing process, a lower hydrophobic and breathable mass transfer membrane is placed on the polytetrafluoroethylene patch 10 of the cooling pressure plate 7, a seawater phase change mass transfer channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer channel plate.

[0038] A reset locator 6 is fixed to the side of the upper sealing plate 2 facing the lifting plate. A parallelism reinforcing beam 9 is provided on the lifting plate. The parallelism reinforcing beam 9 and the reset locator 6 effectively improve the parallelism and shape stability of the cooling pressure plate 8. The traditional carbon steel heat-conducting strip is replaced by a copper-based heat-conducting metal sheet 13, which further avoids uneven pressure and temperature distribution on the plate.

[0039] The present invention also includes an all-solid-state induction heater 11, which is electrically connected to the heat-conducting metal sheet 13.

[0040] The present invention also includes a chiller 12, which is connected to the flow channel of the cooling pressure plate 8 and the flow channel of the cooling pressure plate 7 via pipes.

[0041] The lifting mechanism is a cylinder 1, the cylinder barrel of which is mounted on the upper sealing plate 2, and the piston rod of the cylinder 1 is fixed to the lifting plate.

[0042] The bidirectional parallel multi-stage sealing device for seawater phase change mass transfer devices of the present invention, through its bidirectional operation design, enables the hot-press sealing of both sides in a single operation, and seals and molds the seawater phase change mass transfer device on both sides in one go. This avoids the cumbersome process of flipping and hot-pressing multiple times in traditional processes, greatly improving production efficiency and reducing operation steps and labor intensity.

[0043] This invention utilizes a lifting mechanism and several supporting columns 4 to guide the vertical movement of the cooling pressure plate 8, thereby ensuring the parallelism between the cooling pressure plate 8 and the seawater phase change mass transfer channel plate. This ensures that the upper and lower sides of the seawater phase change mass transfer channel plate are uniformly pressed against the hydrophobic and breathable mass transfer membrane. The embedded heat-conducting metal sheet 13 ensures uniform heating of the hot-pressed area between the seawater phase change mass transfer channel plate and the hydrophobic and breathable mass transfer membrane, thus achieving a tight and uniform connection between the hydrophobic and breathable mass transfer membrane and the seawater phase change mass transfer channel plate. Through reasonable structural and material design, this invention effectively avoids the problems of bending deformation of the channel plate and performance degradation of the membrane material caused by uneven pressure and temperature.

[0044] The method for preparing the seawater phase change mass transfer device of the present invention includes the following steps:

[0045] S1: A lower hydrophobic and breathable mass transfer membrane is placed on the polytetrafluoroethylene patch 10 of the cooling pressure plate 7, a seawater phase change mass transfer channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer channel plate.

[0046] S2: After starting cylinder 1, cooling pressure plate 8 is pressed down vertically to press the seawater phase change mass transfer channel plate and hydrophobic and breathable mass transfer membrane together. The pressing pressure is controlled by adjusting cylinder 1, and pressure is applied to the seawater phase change mass transfer channel plate and hydrophobic and breathable mass transfer membrane. The heat-conducting metal sheets 13 in cooling pressure plate 8 and cooling pressure plate 7 are controlled by frequency conversion of all-solid-state induction heater 11, so that the temperature of the heat-conducting metal sheets 13 in cooling pressure plate 8 and cooling pressure plate 7 rises synchronously and uniformly.

[0047] S3: Preheat once to allow the polymer molecular chains of the hydrophobic and breathable mass transfer membrane to penetrate into the polytetrafluoroethylene composite layer; then heat to the melting temperature of the hydrophobic and breathable mass transfer membrane and the seawater phase change mass transfer channel plate and maintain for a period of time, then stop heating;

[0048] S4: By controlling the output flow rate of cooling water, uniform cooling of the pressure plate 8 and the pressure plate 7 is achieved, preventing the accumulation of internal stress in the seawater phase change mass transfer device caused by excessive cooling.

[0049] S5: After the first cooling to room temperature, both sides are reheated to complete the second annealing, eliminating some internal stress;

[0050] S6: Finally, the entire system is cooled to room temperature. After the cooling pressure plate 8 is lifted by cylinder 1, it returns to its initial position according to the reset positioner 6. The reset positioner 6 then corrects the shape of the cooling pressure plate 8 again, thus completing the multi-stage sealing of the seawater phase change mass transfer device.

[0051] It should be noted that the cooling pressure plate 8 of the present invention can be above or below the cooling pressure plate 7; the material of the heat-conducting metal sheet 13 can be copper, silver, or other metals or alloys with good thermal conductivity; the pressure source of the present invention can be pneumatic, hydraulic, electromagnetic, mechanical, etc.; the cooling medium of the present invention can also be ethanol, ethylene glycol, air, etc.

[0052] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A method for preparing a seawater phase change mass transfer device, characterized in that: The bidirectional parallel multi-stage sealing device for seawater phase change mass transfer includes an upper sealing plate (2), a lower sealing plate (3), and several support columns (4) connecting the upper sealing plate (2) and the lower sealing plate (3). A lifting mechanism is installed on the upper sealing plate (2), and a lifting plate is connected to the output end of the lifting mechanism. A cooling pressure plate (8) is provided on the side of the lifting plate facing the lower sealing plate (3), and a cooling pressure plate (7) is provided on the side of the lower sealing plate (3) facing the lifting plate. Both the cooling pressure plate (8) and the cooling pressure plate (7) are embedded with heat-conducting metal sheets (13) for heating and flow channels for cooling heat-conducting metal sheets (13). Both the surfaces of the cooling pressure plate (8) and the cooling pressure plate (7) are covered with polytetrafluoroethylene patches (10). During the pressing process, a lower hydrophobic and breathable mass transfer membrane is placed on the polytetrafluoroethylene patch (10) of the cooling pressure plate (7), a seawater phase change mass transfer channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer channel plate. Includes the following steps: S1: A lower hydrophobic and breathable mass transfer membrane is placed on the polytetrafluoroethylene patch (10) of the cooling pressure plate (7), a seawater phase change mass transfer channel plate is placed on the lower hydrophobic and breathable mass transfer membrane, and an upper hydrophobic and breathable mass transfer membrane is placed on the seawater phase change mass transfer channel plate. S2: After the lifting mechanism is started, the cooling pressure plate (8) is pressed down vertically to press the seawater phase change mass transfer channel plate and the hydrophobic and breathable mass transfer membrane. The pressure is controlled by adjusting the lifting mechanism to apply pressure to the seawater phase change mass transfer channel plate and the hydrophobic and breathable mass transfer membrane. The heat-conducting metal sheets (13) in the cooling pressure plate (8) and the cooling pressure plate (7) are controlled by frequency conversion to make the temperature of the heat-conducting metal sheets (13) in the cooling pressure plate (8) and the cooling pressure plate (7) rise synchronously and uniformly. S3: Preheat once to allow the polymer molecular chains of the hydrophobic and breathable mass transfer membrane to penetrate into the polytetrafluoroethylene composite layer; then heat to the melting temperature of the hydrophobic and breathable mass transfer membrane and the seawater phase change mass transfer channel plate and maintain for a period of time, then stop heating; S4: By controlling the output flow rate of cooling water, the cooling pressure plate (8) and the cooling pressure plate (7) are cooled at a uniform speed to prevent the accumulation of internal stress in the seawater phase change mass transfer device caused by excessive cooling. S5: After the first cooling to room temperature, both sides are reheated to complete the second annealing, eliminating some internal stress; S6: Finally, the whole thing is cooled to room temperature. After the cooling pressure plate (8) is lifted by the lifting mechanism, it returns to the initial position, thus completing the multi-stage sealing of the seawater phase change mass transfer device.

2. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: In step S2, the heat-conducting metal sheets (13) inside the pressure plate (8) and the pressure plate (7) are cooled by frequency conversion control of the all-solid-state induction heater (11).

3. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: In step S6, after the cooling pressure plate (8) is lifted by the lifting mechanism, it returns to the initial position according to the reset positioner (6), and the reset positioner (6) corrects the shape of the cooling pressure plate (8) again.

4. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: A linear bearing (5) is fitted onto the support column (4), and the linear bearing (5) is fixed to the lifting plate.

5. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: The upper sealing plate (2) is fixed with a reset positioner (6) on the side facing the lifting plate.

6. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: The lifting plate is equipped with a parallelism reinforcing beam (9).

7. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: It also includes an all-solid-state induction heater (11), which is electrically connected to a heat-conducting metal sheet (13).

8. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: It also includes a chiller (12), which is connected to the flow channel of the cooling pressure plate (8) and the flow channel of the cooling pressure plate (7) through pipes.

9. The method for preparing a seawater phase change mass transfer device according to claim 1, characterized in that: The lifting mechanism is a cylinder (1), the cylinder barrel of the cylinder (1) is installed on the upper sealing plate (2), and the piston rod of the cylinder (1) is fixed to the lifting plate.

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