Preparation device of enhanced ion exchange membrane

Abstract

The utility model discloses a preparation device of an enhanced ion exchange membrane, which comprises a heating substrate for laying an ion exchange membrane base material and an enhanced net layer, and a heating top plate correspondingly arranged above the heating substrate, the heating substrate and the heating top plate are provided with a first heating area, a second heating area and a third heating area which are of frame structures from outside to inside, a normal temperature area is formed in the third heating area, and the heating temperature gradients of the first heating area, the second heating area and the third heating area are reduced. According to the utility model, the reinforced net / membrane and the ion exchange membrane are locally compounded by adopting a high-temperature hot-pressing method, so that mechanical damage of the membrane caused by membrane size change due to dry-wet alternation and high and low temperature change is avoided; the mechanical damage of the membrane caused by stress concentration in the assembly process is improved, the service life of the membrane is prolonged, and meanwhile, the hydrophilic performance and the electrochemical performance of the ion exchange membrane with the effective use area are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of ion exchange membranes, and in particular relates to a preparation device for an enhanced ion exchange membrane. Background Art

[0002] With the increase in industrial demand, the demand for ion-selective membrane materials has increased significantly. In 1950, Walter Juda prepared the first heterogeneous polymer ion exchange membrane, which has a wide range of applications in electrodialysis and has good performance. With the successful development of materials containing exchange groups (-SO3H and -COOH), the prepared ion exchange membranes have been studied for ion-selective permeability, and polymer ion exchange membranes have been industrialized in electrodialysis technology and other aspects. In the 1960s, Japan's Asahi Corporation applied ion exchange membranes to the industrial production of seawater salt production. Subsequently, the Dupon Company in the United States successfully developed and prepared a type of ion exchange membrane of perfluorosulfonic acid and perfluorocarboxylic acid in the 1960s. Initially, it was used to meet the application of the chlor-alkali industry. With the development of energy, ion exchange membranes have been used in fuel cells, liquid flow current, water electrolysis and other fields, and their applications are becoming more and more extensive.

[0003] Ion exchange membranes can be divided into cation exchange membranes, anion exchange membranes, amphoteric exchange membranes, mosaic ion exchange membranes, polyelectrolyte complex membranes, etc., according to their functions and structures. As functional macromolecular polymers, ion exchange membranes have the characteristics of hydrophilic ion exchange groups and high ion conductivity. However, during the assembly process and operation, stress concentration, alternating dry and wet conditions, high and low temperature changes, etc., can cause mechanical damage to the exchange membrane, which seriously affects its service life. Utility Model Content

[0004] Purpose of the invention: The purpose of the utility model is to provide a device for preparing an enhanced ion exchange membrane to improve the mechanical strength of the ion exchange membrane during assembly and use.

[0005] Technical solution: The utility model discloses a device for preparing an enhanced ion exchange membrane, which comprises a heating substrate for laying an ion exchange membrane substrate and a reinforced mesh layer, and a heating top plate correspondingly arranged above the heating substrate, wherein the heating substrate and the heating top plate are provided with a first heating area, a second heating area, and a third heating area of ​​a frame structure from the outside to the inside, and a normal temperature area is formed inside the third heating area, and the heating temperature gradients of the first heating area, the second heating area, and the third heating area are reduced.

[0006] Preferably, the heating surface of the heating substrate is a flat plate structure;

[0007] The heating plate surface of the heating top plate is a compression surface structure with convex and concave textures, and the texture depth of the convex and concave textures is 50-500 μm pressed into the surface of the ion exchange membrane substrate.

[0008] Preferably, the temperature of the first heating zone is set to the melting point of the reinforcing mesh layer; the second heating zone is set to a temperature drop gradient of 30-80°C; and the third heating zone is set to a temperature drop gradient of 80-120°C.

[0009] Preferably, the widths of the first heating area, the second heating area and the third heating area are not greater than the width of the reinforcing mesh layer.

[0010] Preferably, a driving mechanism is provided on the top of the heating top plate, and the driving mechanism drives the heating top plate to move downward at a speed of 0.5-5 m / min and applies a pressure of 2-30 MPa to the reinforcement mesh layer and the ion exchange membrane substrate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The preparation device of the utility model adopts high-temperature hot pressing method to locally compound the reinforcing net / membrane with the ion exchange membrane, so as to avoid the mechanical damage of the membrane due to the change of membrane size caused by dry-wet alternation and high and low temperature changes; the mechanical damage of the membrane caused by stress concentration during the assembly process is improved, the service life of the membrane is increased, and the hydrophilicity and electrochemical properties of the ion exchange membrane with effective use area are guaranteed;

[0013] 2. The gradient temperature control of the heating top plate and the heating substrate in the preparation device prevents wrinkles and unevenness caused by the large temperature difference at the composite boundary of the enhanced ion exchange membrane, and the prepared enhanced ion exchange membrane is flat and uniform;

[0014] 3. Highly elastic and high temperature resistant materials are placed in the non-composite area of ​​the ion exchange membrane to avoid the microstructure of the ion exchange membrane being destroyed under pressure at the effective position of the ion exchange membrane in the non-composite area, thus ensuring the filtration performance of the ion exchange membrane;

[0015] 4. The preparation device of the enhanced ion exchange membrane is environmentally friendly and easy to operate, and the prepared ion exchange membrane meets the engineering assembly requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an enhanced ion exchange membrane according to an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the processing device for medium-enhanced ion exchange membrane.

[0018] Figure numerals: 100, preparation device; 1, ion exchange membrane substrate; 2, reinforcement mesh layer; 3, composite area; 4, high temperature resistant cushion layer; 5, heating substrate; 6, first heating area; 7, second heating area; 8, third heating area; 9, normal temperature area. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figure 1~2 The technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the utility model.

[0020] like Figure 1~2 As shown, a device for preparing an enhanced ion exchange membrane according to an embodiment of the utility model, the preparation device 100 includes a heating substrate 5 for laying an ion exchange membrane substrate 1 and a reinforced mesh layer 2, and a heating top plate correspondingly arranged above the heating substrate 5, the heating substrate 5 and the heating top plate are provided with a first heating area 6, a second heating area 7, and a third heating area 8 of a frame structure from the outside to the inside, and a normal temperature area 9 is formed inside the third heating area 8, and the heating temperature gradients of the first heating area 6, the second heating area 7, and the third heating area 8 are reduced. The heating surface of the heating substrate 5 is a flat plate surface structure, and the heating plate surface of the heating top plate is a pressing surface structure with convex and concave textures. The texture depth of the convex and concave textures is 50~500 µm pressed into the surface of the ion exchange membrane substrate 1. The plasma exchange membrane substrate 1 is laid on the heating substrate 5, and the reinforced mesh layer 2 is laid on the composite area 3 of the plasma exchange membrane substrate 1 accordingly. A high temperature resistant cushion layer 4 is laid on the plasma exchange membrane substrate 1 in the composite area 3, and then the heating top plate is pressed down corresponding to the heating substrate 5 to complete the pressing of the reinforced mesh layer 2 and the ion exchange membrane substrate 1 through the convex and concave texture structure, thereby increasing the friction of the heating top plate during the heat sealing process and avoiding the dislocation of the reinforced mesh layer 2.

[0021] The temperature of the first heating area 6 of the heating substrate 5 and the heating top plate is set to the melting point of the enhanced mesh layer 2, and the temperature range of the first heating area 6 is controlled between 150-300°C. The ion exchange membrane substrate 1 is a sulfonated polyetheretherketone material, and the enhanced mesh layer 2 is a polytetrafluoroethylene material; the second heating area 7 is set to a temperature drop gradient of 30-80°C; the third heating area 8 is set to a temperature drop gradient of 80-120°C. In a specific embodiment, the heating temperature of the first heating area 6 can be raised to 250°C, the heating temperature of the second heating area 7 can be raised to 180°C, and the heating temperature of the third heating area 8 can be raised to 90°C. The normal temperature area 9 is an area where the normal temperature part of the heating plate is not heated, and is the effective filtering part of the enhanced ion exchange membrane.

[0022] The width of the first heating area 6, the second heating area 7 and the third heating area 8 is not greater than the width of the reinforced mesh layer 2. Specifically, the sum of the widths of the first heating area 6, the second heating area 7 and the third heating area 8 is equal to or slightly less than the width of the reinforced mesh layer 2, so that the reinforced mesh layer 2 and the ion exchange membrane substrate 1 are well heat-sealed, the mechanical strength of the reinforced area is improved, and the mechanical damage of the membrane caused by the change of the membrane size due to the alternation of dry and wet, high and low temperature changes is avoided. In addition, the mechanical damage of the membrane caused by the stress concentration during the assembly process is improved, the service life of the membrane is improved, and the hydrophilicity and electrochemical properties of the ion exchange membrane of the effective use area are guaranteed.

[0023] In an optional embodiment, a driving mechanism (not shown in the figure) is provided on the top of the heating top plate, and the driving mechanism can be a driving cylinder and auxiliary accessories, and the driving cylinder can be a driving cylinder, a driving electric cylinder or a hydraulic cylinder. The driving mechanism drives the heating top plate to move downward at a speed of 0.5-5 m / min and applies a pressure of 2-30 MPa to the reinforcing mesh layer 2 and the ion exchange membrane substrate 1.

[0024] The working principle or working method of the utility model:

[0025] First, the heating switch of the power supply is turned on to provide electric energy for the heating substrate 5 and the heating top plate, and the first heating area, the second heating area and the third heating area of ​​the heating substrate and the heating top plate are prepared to heat up at a set temperature.

[0026] Then, the ion exchange membrane substrate 1 made of sulfonated polyetheretherketone material with an effective area cut is laid flat on the heating substrate 5, and the reinforced mesh layer 2 made of polytetrafluoroethylene material is laid flat on the composite area 3 around the ion exchange membrane substrate 1. The high-temperature resistant cushion layer 4 made of high-elasticity, high-temperature resistant oily graphite membrane material with an effective area of ​​the ion exchange membrane substrate 1 is cut and laid flat on the ion exchange membrane substrate 1 in the non-composite area inside the reinforced mesh layer 2.

[0027] Finally, start the descending switch of the driving mechanism, and the driving mechanism drives the heating top plate to descend at a speed of 0.5~5m / min. The pressure control range of the heating top plate is between 2~30 MPa. Keep the heat under this pressure condition for 5~60min, stop heating the heating top plate and the heating substrate, turn on the ascending switch of the driving mechanism, and take out the enhanced ion exchange membrane when the temperature drops to 50℃.

[0028] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A device for preparing an enhanced ion exchange membrane, characterized in that: The preparation device (100) comprises a heating substrate (5) on which an ion exchange membrane substrate (1) and a reinforcement mesh layer (2) are laid, and a heating top plate correspondingly arranged above the heating substrate (5); the heating substrate (5) and the heating top plate are provided with a first heating region (6), a second heating region (7), and a third heating region (8) of a frame structure from the outside to the inside, and a normal temperature region (9) is formed inside the third heating region (8); and the heating temperature gradients of the first heating region (6), the second heating region (7), and the third heating region (8) are reduced.

2. The device for preparing the enhanced ion exchange membrane according to claim 1, characterized in that: The heating surface of the heating substrate (5) is a flat plate structure; The heating plate surface of the heating top plate is a compression surface structure with convex and concave textures, and the texture depth of the convex and concave textures is 50-500 μm pressed into the surface of the ion exchange membrane substrate (1).

3. The device for preparing the enhanced ion exchange membrane according to claim 2, characterized in that: The temperature of the first heating zone (6) is set to the melting point of the reinforcing mesh layer (2); the temperature of the second heating zone (7) is set to a temperature drop gradient of 30 to 80° C.; and the temperature of the third heating zone (8) is set to a temperature drop gradient of 80 to 120° C.

4. The device for preparing the enhanced ion exchange membrane according to claim 3, characterized in that: The widths of the first heating area (6), the second heating area (7) and the third heating area (8) are no greater than the width of the reinforcing mesh layer (2).

5. The device for preparing the enhanced ion exchange membrane according to any one of claims 1 to 4, characterized in that: A driving mechanism is provided at the top of the heating top plate, and the driving mechanism drives the heating top plate to move downward at a speed of 0.5 to 5 m / min and applies a pressure of 2 to 30 MPa to the reinforcing mesh layer (2) and the ion exchange membrane substrate (1).

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