Ion exchange membrane pretreatment device

Abstract

The utility model discloses an ion exchange membrane pretreatment device, which relates to the technical field of ion exchange membranes, and comprises a water bath box body, an accommodating cavity is arranged in the water bath box body, and a support net for supporting an ion exchange membrane is arranged in the water bath box body; the tank body heater is mounted at the bottom of the water bath box body; the ultrasonic transmitter is mounted on the inner wall of the water bath box body. According to the utility model, the water bath box body is adopted to pretreat the ion exchange membrane, the supporting net is adopted to support the ion exchange membrane, during pretreatment, the tank body heater heats a solution in the box body, the solution is in a constant-temperature state, and during cleaning of the ion exchange membrane, the ultrasonic transmitter transmits ultrasonic waves, so that the cleaning effect on the ion exchange membrane is very good. The box body is of a double-layer structure, and the heat insulation material is filled between the double-layer structure, so that the solution in the box body can be effectively insulated. The titanium alloy layer or the ceramic layer on the inner wall of the box body can effectively prevent the acid solution from corroding the water bath box body.

Description

Technical Field

[0001] The utility model relates to the technical field of ion exchange membranes, in particular to a pretreatment device for activating ion exchange membranes. Background Art

[0002] Ion exchange membranes include cation exchange membranes and anion exchange membranes. The current mainstream water electrolysis hydrogen production technologies include alkaline water electrolysis, proton exchange membrane electrolysis, and solid polymer anion exchange membrane electrolysis. Among them, proton exchange membrane electrolysis uses cation exchange membranes, and alkaline water electrolysis and solid polymer anion exchange membrane electrolysis use anion exchange membranes. Alkaline water electrolysis technology is mature and widely used commercially. Proton exchange membrane electrolysis technology is mature, but the equipment cost is high and commercial applications are rare. Solid polymer anion exchange membrane electrolysis is still in the research and development and demonstration stage and has no commercial application yet.

[0003] There are some standards for the quality evaluation of ion exchange membranes, such as ionic conductivity, thermal stability, chemical and mechanical stability, selective permeability, gas permeability, thermal conductivity, etc. Therefore, before the ion exchange membrane is assembled into the electrolyzer, the performance of the ion exchange membrane needs to be tested by a test fixture and a test bench.

[0004] In addition, before the performance test of the ion exchange membrane, the ion exchange membrane needs to be pretreated and activated to achieve the best performance. During the pretreatment process, the ion exchange membrane needs to maintain a stable temperature of the solution for treating the membrane, change the solution regularly, and use deionized water for cleaning.

[0005] For example, the Chinese invention with patent number 202110377053.5 discloses a proton exchange membrane aging method and a proton exchange membrane hydrogen permeation test method, wherein the proton exchange membrane is pretreated to remove organic impurities and inorganic ions in the proton exchange membrane to obtain a pretreated membrane. The pretreatment includes: washing with hydrogen peroxide and acid washing in sequence. The proton exchange membrane is a cation exchange membrane. When the proton exchange membrane is subjected to an aging test, the proton exchange membrane must be pretreated first.

[0006] Currently, smaller ion exchange membranes can be processed in small containers, but larger ion exchange membranes must be pretreated in large containers, which makes it very difficult to heat, replace, and clean the solution.

[0007] Therefore, the pretreatment device of ion exchange membrane is a technical problem that needs to be solved urgently. Summary of the invention

[0008] Based on this, it is necessary to provide an ion exchange membrane pretreatment device to address the technical problem of the difficulty of ion exchange membrane pretreatment.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An ion exchange membrane pretreatment device, comprising:

[0011] A water bath box, wherein the interior of the water bath box is a containing cavity, a support net for supporting the ion exchange membrane is arranged inside the water bath box, and a titanium alloy layer or a ceramic layer is coated on the inner wall of the water bath box. ;

[0012] A tank heater, the tank heater is installed at the bottom of the water bath box;

[0013] An ultrasonic transmitter is installed on the inner wall of the water bath box.

[0014] By adopting the above technical solution, the ion exchange membrane is placed on the support net, and the solution for pre-treating the ion exchange membrane is added into the water bath. The ion exchange membrane is completely immersed in the solution. When the ion exchange membrane is processed in batches, PE, PP or PET nets are used to separate the two membranes. The solution in the water bath is heated by a tank heater, and the preset constant temperature is maintained to pre-treat the ion exchange membrane. After the solution is used for pre-treatment, the solution is discharged, and deionized water is poured into the water bath. The ultrasonic transmitter is turned on to thoroughly clean the inside of the water bath and the ion exchange membrane. The deionized water needs to be replaced several times until the water conductivity in the water bath is less than 0.01mS / cm. The solution for pre-treating the ion exchange membrane is an acidic solution. The titanium alloy layer or ceramic layer on the inner wall of the box can effectively prevent the acidic solution from corroding the water bath and extend the service life of the water bath.

[0015] Preferably, the water bath box comprises a box body and a box cover, and the box body and the box cover are connected via a hinge shaft.

[0016] By adopting the above technical solution, during the ion exchange membrane pretreatment, the box cover needs to be closed to reduce the heat loss in the water bath box.

[0017] Preferably, the box body is a double-layer structure, including an inner layer and an outer layer, and the space between the inner layer and the outer layer is filled with heat insulating material.

[0018] By adopting the above technical solution, the heat insulation material can reduce the heat loss in the water bath box, which is conducive to creating a constant temperature environment.

[0019] Preferably, the bottom wall of the box body is inclined, and a drain outlet is provided at a lower end of the bottom wall of the box body, and the drain outlet is connected to a faucet.

[0020] By adopting the above technical solution, the pretreatment solution and deionized water in the water bath box need to be frequently replaced, and drainage can be facilitated by using a drain port and a faucet.

[0021] Preferably, at least two legs are provided at the bottom of the support net.

[0022] By adopting the above technical solution, the support net can be directly placed in the water bath box through at least two legs, ensuring that the support net has a certain height and does not contact the tank heater.

[0023] Compared with the related art, the ion exchange membrane pretreatment device provided by the utility model has the following beneficial effects:

[0024] 1. The utility model adopts a water bath box to pre-treat the ion exchange membrane, and adopts a support net to hold up the ion exchange membrane. During the pre-treatment, the tank heater heats the solution in the box, and the solution is in a constant temperature state. When cleaning the ion exchange membrane, the ultrasonic transmitter emits ultrasonic waves, which has a good cleaning effect on the ion exchange membrane.

[0025] 2. The box body is set as a double-layer structure, and the middle of the double-layer structure is filled with heat-insulating materials, which can effectively keep the solution in the box warm.

[0026] 3. The titanium alloy layer or ceramic layer on the inner wall of the water bath can effectively prevent the acid solution from corroding the water bath body and extend the service life of the water bath body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of an ion exchange membrane pretreatment device.

[0028] Figure 2 This is a three-dimensional view of the ion exchange membrane pretreatment device without the box cover.

[0029] Figure 3 It is a three-dimensional diagram of the ion exchange membrane pretreatment device without the support mesh.

[0030] Figure 4 This is a top view of the ion exchange membrane pretreatment device without the support mesh.

[0031] Figure 5 A three-dimensional diagram of the support network.

[0032] Figure numerals: 1, water bath box; 11, box body; 111, inner layer; 112, outer layer; 12, box cover; 121, handle; 13, support net; 131, support leg; 14, faucet; 2, tank heater; 3, ultrasonic transmitter. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as limiting the present invention.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] See also Figures 1 to 5 As shown, an ion exchange membrane pretreatment device provided by an embodiment of the utility model includes a water bath box 1, a tank heater 2 and an ultrasonic transmitter 3. The interior of the water bath box 1 is a accommodating cavity for placing the ion exchange membrane and the pretreatment solution. The interior of the water bath box 1 is provided with a support net 13 for supporting the ion exchange membrane.

[0037] The tank heater 2 is installed at the bottom of the water bath box 1. After it is powered on, it can heat the pretreatment solution in the water bath box 1. A temperature sensor is arranged inside the water bath box 1 to monitor the temperature value in the water bath box 1 in real time. The operation of the tank heater 2 is adjusted by the thermostat to ensure that the pretreatment solution in the water bath box 1 is in a preset temperature range.

[0038] The ultrasonic transmitter 3 is installed on the inner wall of the water bath body 1 and is turned on when the ion exchange membrane in the water bath body 1 is cleaned. The ultrasonic transmitter 3 generates a high-frequency electrical signal, which is converted into mechanical vibration through a transducer to generate ultrasonic waves, which has a good cleaning effect and is easy to operate.

[0039] In this embodiment, the water bath box 1 includes a box body 11 and a box cover 12, the box body 11 and the box cover 12 are connected by a hinge, a handle 121 is provided on the top of the box cover 12, and a steam outlet is provided on the box cover 12. When the ion exchange membrane is pretreated, the pretreatment solution will generate steam and be discharged from the steam outlet.

[0040] In this embodiment, the box body 11 is a double-layer structure, including an inner layer 111 and an outer layer 112 , and the space between the inner layer 111 and the outer layer 112 is filled with a heat insulating material, which can reduce heat loss in the water bath box body 1 .

[0041] In this embodiment, the pretreatment solution for the ion exchange membrane is an acidic solution, and during the pretreatment, a titanium alloy layer or a ceramic layer is coated on the inner wall of the box 11. The titanium alloy layer or the ceramic layer has excellent high temperature resistance, acid resistance, and alkali resistance, so that the box 11 is not corroded by the pretreatment solution.

[0042] In this embodiment, the bottom wall of the box body 11 is inclined, and a drain outlet is opened at the lower end of the bottom wall of the box body 11. The drain outlet is connected to a faucet 14. A sealing tape or sealant is used to seal the outer wall of the faucet 14 and the drain outlet to prevent water in the box body 11 from entering the double-layer structure of the box body 11.

[0043] In this embodiment, at least two legs 131 are provided at the bottom of the support net 13, and the lower ends of the two legs 131 are in contact with the bottom wall of the water bath box 1, so that the support net 13 can be directly placed in the water bath box 1. The legs 131 can ensure that the support net 13 has a certain height and does not contact the tank heater 2.

[0044] Using the ion exchange membrane pretreatment device of the present application, the general cation exchange membrane pretreatment steps are as follows: S1: soaking all cation exchange membranes in 0.5~1M H2SO4. When batch processing, two adjacent cation exchange membranes are separated by PE / PP / PET nets;

[0045] S2: Set the pretreatment temperature to 50~60℃, replace the solution with fresh solution after 4 hours, control the solution temperature to 50~60℃, and leave it overnight;

[0046] S3: On the second day, pour out the solution, wash with deionized water, and replace the deionized water 3 to 4 times per hour until the water conductivity in the water bath box 1 is less than 0.01 mS / cm after 10 minutes;

[0047] S4: taking the cation exchange membrane out of the water bath 1 and placing it between two sheets of dry paper for drying;

[0048] S5: Place the cation exchange membrane at 80°C and dry it in 20 to 30 minutes.

[0049] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ion exchange membrane pretreatment device, characterized in that: include: A water bath box (1), wherein the interior of the water bath box (1) is a containing cavity, a support net (13) for supporting an ion exchange membrane is arranged inside the water bath box (1), and a titanium alloy layer or a ceramic layer is coated on the inner wall of the water bath box (1); A tank heater (2), wherein the tank heater (2) is installed at the bottom of the water bath box (1); An ultrasonic transmitter (3), wherein the ultrasonic transmitter (3) is installed on the inner wall of the water bath box (1).

2. The ion exchange membrane pretreatment device according to claim 1 is characterized in that: The water bath box (1) comprises a box body (11) and a box cover (12), and the box body (11) and the box cover (12) are connected via a hinge shaft.

3. The ion exchange membrane pretreatment device according to claim 2 is characterized in that: The box body (11) is a double-layer structure, comprising an inner layer (111) and an outer layer (112), and a heat insulating material is filled between the inner layer (111) and the outer layer (112).

4. The ion exchange membrane pretreatment device according to claim 2 is characterized in that: The bottom wall of the box body (11) is arranged in an inclined manner, and a drainage outlet is provided at a lower end of the bottom wall of the box body (11), and the drainage outlet is connected to a faucet (14).

5. The ion exchange membrane pretreatment device according to claim 2, characterized in that: A handle (121) is provided on the top of the box cover (12).

6. The ion exchange membrane pretreatment device according to claim 1 is characterized in that: At least two supporting legs (131) are arranged at the bottom of the support net (13).

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