Alkaline electrolytic bath device

Abstract

The invention belongs to the technical field of electrolytic baths, and particularly relates to an alkaline electrolytic bath device, a temperature detection unit comprises a unit body, a plurality of temperature detection elements and a supporting body, the unit body is arranged between two adjacent small electrolysis chambers, a detection cavity is formed in the unit body, and a plurality of flow channel openings are formed in the edge of the unit body in an axial penetrating mode; the detection cavity is not communicated with the flow channel openings, the temperature detection elements are arranged on at least one face in the detection cavity, the supporting body is arranged in the detection cavity and connected between the two faces, facing the adjacent small electrolysis chambers, of the detection cavity, and the supporting body and the unit body are both made of conductive materials. On the basis of ensuring normal circulation of alkali liquor among the electrolysis cells, normal conduction of current and no influence on the electrolysis efficiency, the temperature of each to-be-detected point in the electrolysis cells can be more directly obtained, and accurate detection of the temperature of the electrolysis cell device is realized; and the problems of high sealing difficulty at the wiring position of the temperature detection element and easiness in leakage of alkali liquor are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrolytic cells, and particularly relates to an alkaline electrolytic cell device. BACKGROUND

[0002] At present, the country vigorously promotes renewable energy electrolytic water hydrogen projects such as photovoltaic and wind power to solve the problem of new energy consumption. Among them, the alkaline electrolytic cell becomes the focus of market attention due to the advantages of low cost, stable operation and long service life. However, during operation, the electrolytic cell will generate a large amount of heat, and if the heat management is not proper, it is easy to cause local high temperature dryness of the electrolytic cell, resulting in problems such as sharp increase of energy consumption, damage of the diaphragm and gasket bulging. Therefore, accurate measurement of the internal temperature of the electrolytic cell is the key prerequisite for effective electrolytic cell heat management.

[0003] At present, the alkaline electrolytic cell commonly uses external pole frame thermocouples and infrared sensors for temperature measurement. However, due to the significant temperature difference between the outer surface of the alkaline electrolytic cell and the interior of the electrolytic cell, these traditional temperature measurement methods cannot accurately obtain the actual temperature in the electrolytic cell cavity, resulting in a large error in temperature monitoring. If the thermocouple is set in the electrolytic cell, there will be difficulties in sealing the wiring place and the risk of alkali leakage. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an alkaline electrolytic cell device which can more directly obtain the temperature of each measuring point of the electrolytic cell on the basis of ensuring normal flow of alkali between each electrolytic cell, normal conduction of current and not affecting the electrolysis efficiency, avoiding temperature measurement errors caused by radial heat transfer along the pole frame of the bipolar plate and environmental temperature influence, realizing accurate detection of the temperature of the electrolytic cell device, and solving the problems of large sealing difficulty of the temperature detection element wiring place and easy alkali leakage.

[0005] The content of the present application includes two end pressure plates and a plurality of electrolytic cells arranged between the two end pressure plates, and at least one temperature detection unit, a single temperature detection unit includes a unit body, a plurality of temperature detection elements and a support body, the unit body is arranged between two adjacent electrolytic cells, a detection cavity is arranged inside the unit body, and a plurality of flow channel openings are arranged in the edge of the unit body in the axial direction, the plurality of flow channel openings are in communication with the inlet / outlet liquid flow channels on the electrolytic cell, and the detection cavity and the plurality of flow channel openings are not in communication, the plurality of temperature detection elements are arranged inside the detection cavity and distributed on at least one side of the detection cavity facing the adjacent electrolytic cell, the support body is arranged inside the detection cavity and connected between the two sides of the detection cavity facing the adjacent electrolytic cell, and the support body and the unit body are both made of conductive material.

[0006] Further, the plurality of temperature detection elements are arranged in concentric circles on one side of the detection cavity facing the adjacent electrolytic cell, forming a plurality of temperature detection assemblies.

[0007] Further, in each ring of the temperature detection assembly, the number of temperature detection elements in the upper part is greater than that in the lower part, and the temperature detection elements in the upper part are equidistantly arranged, and the temperature detection elements in the lower part are equidistantly arranged.

[0008] Further, the electrolytic cell comprises two bipolar plates, and the distance between the outermost ring of the temperature detection assembly and the axial projection position of the bipolar plate weld in the detection cavity is 5-10 cm.

[0009] Further, the diameter of the detection cavity is the same as the inner diameter of the polar frame of the bipolar plate.

[0010] Further, the support body is provided with a plurality of support bodies arranged in concentric circles or concentric rectangles to form a plurality of support assemblies, and the support bodies in each ring of the support assembly are equidistantly arranged.

[0011] Further, the plurality of support assemblies and the plurality of temperature detection assemblies are concentrically arranged and radially staggered.

[0012] Further, the side surface of the unit body is radially provided with a connecting port communicating with the detection cavity, so that the wire cluster of the temperature detection element passes through or a connector is installed.

[0013] Further, the connecting port is circumferentially provided with two or more on the side surface of the unit body.

[0014] Further, a sealing gasket is arranged between the unit body and the adjacent electrolytic cell, and the sealing gasket is provided with through holes corresponding to the number and position of the flow channel ports.

[0015] The beneficial effects of the present application are: a plurality of temperature detection elements are arranged inside the electrolytic tank device and are distributedly installed, the support body conducts current in the axial direction between the two surfaces of the detection cavity facing the adjacent electrolytic cells, ensures the normal flow of alkali solution between each electrolytic cell, the normal conduction of current, and does not affect the basis of the electrolysis efficiency, can more directly obtain the temperature of each measured point of the electrolytic cell, avoids the temperature measurement error caused by the radial heat transfer along the bipolar plate and the influence of the environment temperature, the measured temperature is more accurate, the accuracy can reach ± 0.5℃, realizes the accurate detection of the temperature of the electrolytic tank device, provides key data support for the construction of the precise temperature monitoring and intelligent fault early warning system of the electrolytic tank device, and improves the safety and stability of the device operation. When the electrolytic tank device is assembled, the temperature detection unit and other structure laminated assembly are assembled, the difficulty of arrangement is lower, and when the electrolytic tank device is operated, all the temperature detection elements are in an isolated state with the alkali solution, solving the problem of large sealing difficulty and easy alkali leakage caused by the wiring of the temperature detection element. The setting of the support body can realize the axial conduction of the current, and also can improve the strength of the temperature detection unit as a whole, and then ensure the reliability of the overall operation of the electrolytic tank device. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of the first embodiment of the alkaline electrolytic tank device of the present application.

[0017] Figure 2 It is a structure schematic view of the first embodiment of the alkaline electrolytic tank device of the present application.

[0018] Figure 3 It is a first longitudinal section structure schematic view of the temperature detection unit of the present application.

[0019] Figure 4 It is a second longitudinal section structure schematic view of the temperature detection unit of the present application.

[0020] Figure 5 It is a first arrangement mode schematic view of the support body of the present application.

[0021] Figure 6 It is a second arrangement mode schematic view of the support body of the present application.

[0022] Figure 7 It is an arrangement schematic view of the temperature detection unit and the support body of the present application.

[0023] Figure 8 It is a wire cluster schematic view of the temperature detection unit of the present application.

[0024] Figure 9 It is a laminated decomposition schematic view of the alkaline electrolytic tank device of the present application.

[0025] Figure 10 It is a connection schematic view of the alkaline electrolytic tank device, the data collector and the upper computer of the present application.

[0026] In the figure: 1. End pressure plate; 2. Screw; 3. Electrolysis chamber; 31. Bipolar plate; 311. Polar frame; 312. Polar plate body; 4. Temperature detection unit; 41. Unit body; 411. Flow channel opening; 412. Detection cavity; 413. Connection port; 42. Temperature detection element; 43. Support body; 44. Wire cluster; 5. Sealing gasket; 6. Data collector; 7. Host computer. DETAILED DESCRIPTION

[0027] like Figures 1-10 As shown, the present invention provides an alkaline electrolytic cell device, comprising at least one temperature detection unit 4, two end pressure plates 1 and a plurality of electrolysis chambers 3, wherein the plurality of electrolysis chambers 3 are arranged between the two end pressure plates 1, and a single temperature detection unit 4 is arranged between two adjacent electrolysis chambers 3. Figure 1 For example, when the number of temperature detection units 4 is one, the temperature detection unit 4 is arranged between two electrolysis chambers 3. Figure 2 For example, when there are three temperature detection units 4, the three temperature detection units 4 are correspondingly arranged between three groups of two adjacent electrolysis chambers. The number of temperature detection units 4 can be selected based on the specifications of the electrolytic cell and the number of electrolysis chambers 3, and the specific number is not limited here. The two end pressure plates 1 are connected by a screw 2 and locked with a nut.

[0028] The temperature detection unit 4 comprises a unit body 41 and a plurality of temperature detection elements 42 and a support body 43. The radial dimension of the unit body 41 is the same as that of the electrolysis chamber 3, that is, the outer contour parameter of the temperature detection unit 4 matches that of the electrolysis chamber 3. For example, when the outer contour of the electrolysis chamber 3 is circular, the unit body 41 is also circular with the same diameter. When the outer contour of the electrolysis chamber 3 is rectangular, the unit body 41 is also rectangular with the same length and width. The unit body 41 is arranged between two electrolysis chambers 3. The unit body 41 is internally provided with a detection cavity 412. A plurality of flow channel openings 411 are axially arranged at the edge of the unit body 41. The plurality of flow channel openings 411 correspond to and communicate with the number and positions of the inlet / outlet flow channels of the electrolysis chamber 3, so that the electrolyte can flow between the two electrolysis chambers 3 adjacent to the temperature detection unit 4. The detection cavity 412 and the plurality of flow channel openings 411 are not connected, that is, the plurality of flow channel openings 411 are located at the radial edge region of the unit body 41, and the detection cavity 412 is separated from the plurality of flow channel openings 411. The plurality of temperature detection elements 42 are arranged in the detection cavity 412 and distributed on at least one side of the detection cavity 412 facing the adjacent electrolysis chamber 3. Since the detection cavity 412 and the plurality of flow channel openings 411 are not connected, the temperature detection elements 42 can be effectively separated from the electrolyte. The support body 43 is arranged in the detection cavity 412 and connected between the two sides of the detection cavity 412 facing the adjacent electrolysis chamber 3. The support body 43 and the unit body 41 are both made of conductive material.

[0029] Based on the above arrangement, the plurality of temperature detection elements 42 are arranged in the electrolytic cell device and distributedly installed. The support body 43 axially conducts current between the two sides of the detection cavity 412 facing the adjacent electrolysis chamber 3, ensuring normal flow of electrolyte between each electrolysis chamber 3, normal conduction of current, and not affecting the electrolysis efficiency. On this basis, the temperature of each measurement point of the electrolysis chamber 3 can be more directly obtained, avoiding the measurement error caused by radial heat conduction along the pole frame 311 of the bipolar plate 31 and the influence of environmental temperature. The measured temperature has higher precision, which can reach ±0.5℃. The temperature of the electrolytic cell device is accurately detected, which provides key data support for building a precise temperature monitoring and intelligent fault warning system for the electrolytic cell device, and improves the safety and stability of the device operation. When the electrolytic cell device is assembled, the temperature detection unit 4 is assembled with other structure laminates, which is less difficult to arrange. When the electrolytic cell device is running, all temperature detection elements 42 are in an isolated state with the electrolyte, solving the problem of high sealing difficulty and easy electrolyte leakage at the wiring of the temperature detection elements 42. The arrangement of the support body 43 can not only axially conduct current, but also improve the overall strength of the temperature detection unit 4, thereby ensuring the reliability of the overall operation of the electrolytic cell device.

[0030] The temperature detection elements 42 are arranged in concentric circles on the side of the detection cavity 412 facing the adjacent electrolysis cell 3, forming several temperature detection assemblies. Based on this arrangement, the temperature detection elements 42 are more evenly distributed in the detection cavity 412, covering a larger range of points, and the feedback temperature data is more representative.

[0031] Since the electrolysis cell 3 is more prone to local high-temperature dry areas on both sides of the upper half of the corresponding detection cavity 412, it is preferred in the present application that the temperature detection elements 42 of each circle are arranged in a manner that the number of temperature detection elements 42 in the upper part is greater than that in the lower part, specifically, the number of temperature detection elements 42 in the upper part is 2-5 more than that in the lower part. And the temperature detection elements 42 in the upper part are equidistantly arranged, and the temperature detection elements 42 in the lower part are equidistantly arranged.

[0032] The structure of the electrolysis cell 3 is the same as that of the prior art, which includes two bipolar plates 31, and a sealing gasket 5 is arranged between the two bipolar plates 31. It is preferred that the distance between the outermost temperature detection assembly and the axial projection position of the welding seam of the bipolar plate 31 in the detection cavity 412 is 5-10 cm, so as to more effectively detect the abnormally high temperature generated at the welding seam of the bipolar plate 31. A single bipolar plate 31 includes a polar frame 311 and a polar plate body 312 welded in the polar frame 311, and the welding area of the polar plate body 312 and the polar frame 311 is the welding seam of the bipolar plate 31. The diameter of the detection cavity 412 is the same as the inner diameter of the polar frame 311, which ensures that the edge of the unit body 41 has sufficient radial size to set the flow port 411, and at the same time ensures that the temperature in the cavity of the electrolysis cell 3 can be effectively projected into the detection cavity 412. Figure 7 For example, three circles of temperature detection assemblies are provided, the distance d1 between the outermost temperature detection assembly and the axial projection position of the welding seam of the bipolar plate 31 in the detection cavity 412 is 5-10 cm, the distance d2 between the middle temperature detection assembly and the axial projection position of the welding seam of the bipolar plate 31 in the detection cavity 412 is 20-40 cm, and the distance d3 between the innermost temperature detection assembly and the axial projection position of the welding seam of the bipolar plate 31 in the detection cavity 412 is 50-70 cm.

[0033] In the present application, the support body 43 is provided with several, and the support bodies 43 are arranged in concentric circles or concentric rectangles, that is, Figure 5 and Figure 6As shown, a plurality of support assemblies are formed, and two adjacent support bodies 43 in each support assembly are equidistantly arranged. Based on this arrangement, the distribution of the support bodies 43 is more uniform, and the stress distribution and heat transfer are also more uniform. The support bodies 43 can be cylindrical or cuboid in shape, and can be made of red copper to balance the electrical conductivity and thermal conductivity. The number of support bodies 43 is 10-30, and the cross-sectional area (i.e. Figures 5-7 the cross-sectional area in the view angle) of a single support body 43 is 500-2000mm 2 . The distance between adjacent support bodies 43 is 200-600mm.

[0034] The plurality of support assemblies are concentrically arranged with the plurality of temperature detection assemblies and are radially staggered. This arrangement can effectively utilize the internal space of the detection cavity 412, ensure the uniform distribution between the temperature detection elements 42 and the support bodies 43, and avoid interference between the support bodies 43 and the temperature detection elements 42.

[0035] The side of the unit body 41 is radially provided with a connecting port 413 in communication with the detection cavity 412, so that the wire cluster 44 of the temperature detection element 42 can pass through or be used to install a connector for connecting the wire cluster 44, so as to facilitate the wiring of the temperature detection element 42. The connecting port 413 is circumferentially provided with two or more on the side of the unit body 41. The thickness (i.e. the axial dimension) of the unit body 41 is 3-5 times the diameter of the connecting port 413, so as to ensure that the area of the unit body 41 provided with the connecting port 413 has a corresponding wall thickness, thereby ensuring the overall strength of the temperature detection unit 4. The thickness of the unit body 41 is specifically 60-100mm. The material of the unit body 41 is the same as that of the bipolar plate 31, specifically carbon steel plated with nickel or other nickel-based materials.

[0036] As shown in Figure 9 , a sealing gasket 5 is arranged between the unit body 41 and the adjacent electrolytic cell 3, so as to ensure the sealing between the flow channel port 411 and the electrolytic cell 3. The sealing gasket 5 is provided with through holes corresponding to the number and position of the flow channel ports 411.

[0037] As shown in Figure 8 and Figure 10 , the connecting wires of adjacent temperature detection elements 42 can be bundled into a wire cluster 44 and then led out from the nearest connecting port 413. After being led out, the connecting wires are connected to a data collector 6. The data collector 6 can be configured with an 8-channel or 16-channel module. The data collector 6 transmits all data to the upper computer 7 through a switch through Modbus TCP or Modbus RTU protocol, and completes data collection.

[0038] The pipe sleeve of the temperature detecting element 42 is made of polytetrafluoroethylene material, which is resistant to corrosion and wear. The pipe sleeve is insulated and sealed from the temperature detecting element 42. The sealing material can be epoxy resin, polyurethane or other. The temperature detecting element 42 is specifically a thermocouple, a thermal resistor or other.

[0039] Those skilled in the art should understand that the above discussion of any of the embodiments is only exemplary and is not intended to imply that the protection scope of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above. In order to be brief, they are not provided in details.

[0040] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. An alkaline electrolytic cell device, characterized in that: The invention comprises two end pressure plates (1) and a plurality of electrolysis chambers (3) arranged between the two end pressure plates (1), and at least one temperature detection unit (4), wherein a single temperature detection unit (4) comprises a unit body (41), a plurality of temperature detection elements (42) and a support body (43), wherein the unit body (41) is arranged between two adjacent electrolysis chambers (3), a detection cavity (412) is arranged inside the unit body (41), and a plurality of flow channel openings (411) are axially penetrated on the edge of the unit body (41), and the plurality of flow channel openings (411) are arranged on the edge of the unit body (41). The passage openings (411) are connected to the liquid inlet / outlet passages on the electrolysis chamber (3), and the detection chamber (412) is not connected to the plurality of passage openings (411). The plurality of temperature detection elements (42) are arranged inside the detection chamber (412) and distributed on at least one side of the detection chamber (412) facing the adjacent electrolysis chamber (3). The support body (43) is arranged inside the detection chamber (412) and connected between the two sides of the detection chamber (412) facing the adjacent electrolysis chamber (3). The support body (43) and the unit body (41) are both made of conductive materials.

2. The alkaline electrolytic cell device according to claim 1, wherein: Several temperature detection elements (42) are arranged in concentric circles on one side of the detection cavity (412) facing the adjacent electrolysis chamber (3), forming several circles of temperature detection components.

3. The alkaline electrolytic cell device according to claim 2, wherein: In each circle of temperature detection components, the number of temperature detection elements (42) in the upper part is greater than the number of temperature detection elements (42) in the lower part, and the temperature detection elements (42) adjacent to each other in the upper part are arranged at equal distances, while the temperature detection elements (42) adjacent to each other in the lower part are arranged at equal distances.

4. The alkaline electrolytic cell device according to claim 2 or 3, wherein: The electrolysis chamber (3) includes two bipolar plates (31), and the distance between the axial projection position of the outermost temperature detection component and the weld of the bipolar plate (31) in the detection cavity (412) is 5-10 cm.

5. The alkaline electrolytic cell device according to claim 4, wherein: The diameter of the detection cavity (412) is the same as the inner diameter of the pole frame (311) of the bipolar plate (31).

6. The alkaline electrolytic cell device according to claim 2 or 3, wherein: There are a plurality of support bodies (43), which are arranged in concentric circles or concentric rectangles to form a plurality of rings of support components, and adjacent support bodies (43) in each ring of support components are arranged at equal distances.

7. The alkaline electrolytic cell device according to claim 6, wherein: Several circles of support components and several circles of temperature detection components are concentrically arranged and radially staggered.

8. The alkaline electrolytic cell device according to any one of claims 1 to 3, 5 and 7, wherein: A connection port (413) communicating with the detection cavity (412) is radially provided on the side surface of the unit body (41) for allowing the wire cluster (44) of the temperature detection element (42) to pass through or for installing a connector.

9. The alkaline electrolytic cell device according to claim 8, wherein: There are more than two connection ports (413) provided in the circumferential direction of the side surface of the unit body (41).

10. The alkaline electrolytic cell device according to any one of claims 1 to 3, 5, 7 and 9, characterized in that: A sealing gasket (5) is provided between the unit body (41) and the adjacent electrolysis chamber (3), and the sealing gasket (5) is provided with through holes corresponding in number and position to the flow channel openings (411).

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