Pole frame, electrolytic cell, alkali water electrolysis system and alkali water electrolysis method

Abstract

The present disclosure relates to a kind of polar frame, electrolytic cell, alkali water electrolysis system and alkali water electrolysis method, the polar frame is provided with at least one cooling liquid inlet and at least one cooling liquid outlet, cooling flow channel is arranged in the polar frame, the cooling liquid inlet and the cooling liquid outlet are all communicated with the cooling flow channel.Through the above technical scheme, the present disclosure can realize the cooling of polar frame, reduce the degree of expansion of polar frame due to high temperature.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of hydrogen production electrolyzers, in particular, to a polar frame, an electrolyzer, an alkaline water electrolysis system and an alkaline water electrolysis method. BACKGROUND

[0002] The electrolyzer generally includes several hundred sets of metal polar frames, polar plates and sealing gaskets, etc., and a sealing gasket is arranged between two adjacent polar frames, wherein the assembly process between the sealing gasket and the polar frame requires very high, and the sealing gasket is usually made of polytetrafluoroethylene, which has the characteristics of high temperature resistance, but has poor resilience and is prone to creep.

[0003] In the working process of the electrolyzer, a large amount of heat will be released, and in a high temperature environment, the polar frame will expand due to heat, and then press the sealing gasket, when the sealing gasket is in a high temperature environment and under a tight pressure, the creep phenomenon will be very obvious, and the sealing gasket after creep is difficult to recover, and the creep amount of multiple sealing gaskets is superimposed, which will cause a gap between the sealing gasket and the polar frame, and further cause liquid leakage and other problems. SUMMARY

[0004] The purpose of the present disclosure is to provide a polar frame, an electrolyzer, an alkaline water electrolysis system and an alkaline water electrolysis method, which can realize the cooling of the polar frame and reduce the expansion of the polar frame due to high temperature.

[0005] In order to achieve the above purpose, the present disclosure provides a polar frame, which is provided with at least one cooling liquid inlet and at least one cooling liquid outlet, and a cooling flow channel is arranged in the polar frame, and the cooling liquid inlet and the cooling liquid outlet are both in communication with the cooling flow channel.

[0006] Optionally, each cooling liquid inlet is in communication with the cooling flow channel through at least one liquid inlet sub-channel, and / or each cooling liquid outlet is in communication with the cooling flow channel through at least one liquid outlet sub-channel.

[0007] Optionally, the length of the liquid inlet sub-channel and / or the liquid outlet sub-channel is 10-20mm and the width is 3-5mm.

[0008] Optionally, the polar frame is configured in a ring shape, and the cooling liquid inlet and / or the cooling liquid outlet are arc-shaped waist holes extending along the circumference of the polar frame.

[0009] Optionally, the length of the cooling liquid inlet and / or the cooling liquid outlet is 50-130mm and the width is 25-35mm.

[0010] Optionally, the cooling liquid inlet and the cooling liquid outlet are each provided with one, the cooling liquid inlet is communicated with the cooling flow channel through the three liquid inlet sub-channels, and the cooling liquid outlet is communicated with the cooling flow channel through the three liquid outlet sub-channels.

[0011] Optionally, the polar frame has an outer edge, and the cooling flow channel is formed in the outer edge and is configured in a ring shape.

[0012] Optionally, the cooling liquid inlet and the cooling liquid outlet are in one-to-one correspondence, and the corresponding cooling liquid inlet and the cooling liquid outlet are located at two ends of the same radial axis of the polar frame.

[0013] Optionally, a plurality of through holes are formed through the polar frame, the plurality of through holes are located on the same circumference and include a raw material inlet and a gas-liquid outlet, the raw material inlet and the gas-liquid outlet are located on different sides of the polar frame, the cooling liquid inlet is arranged close to the gas-liquid outlet, the cooling liquid outlet is arranged close to the raw material inlet, and the cooling flow channel is arranged around the plurality of through holes.

[0014] Optionally, the gas-liquid outlet is provided with a plurality of and is arranged in a circumferential direction of the polar frame, the cooling liquid inlet and the gas-liquid outlet are located on the same circumference of the polar frame, and are arranged in a spaced manner.

[0015] Optionally, the raw material inlet is provided with a plurality of and is arranged in a circumferential direction of the polar frame, the cooling liquid outlet and the raw material inlet are located on the same circumference of the polar frame, and are arranged in a spaced manner.

[0016] Optionally, the polar frame is configured in a ring shape, the cooling liquid inlet and the cooling liquid outlet are formed on the outer circumferential wall of the polar frame, and a joint is arranged at the cooling liquid inlet and / or the cooling liquid outlet.

[0017] On the basis of the above technical solutions, the present disclosure further provides an electrolytic cell comprising the polar frame.

[0018] Optionally, the polar frame is provided with a raw material inlet and a gas-liquid outlet, the electrolytic cell is provided with a lye inlet, a first outlet, a second outlet, a cooling inlet and a cooling outlet, the lye inlet is communicated with the raw material inlet, the first outlet is communicated with the gas-liquid outlet for discharging oxygen and lye, the second outlet is communicated with the gas-liquid outlet for discharging hydrogen and lye, the cooling inlet is communicated with the cooling liquid inlet, and the cooling outlet is communicated with the cooling liquid outlet.

[0019] Optionally, the electrolytic cell is provided with an end plate at both ends, and the cooling inlet is formed on the end plate or the polar frame.

[0020] On the basis of the above technical scheme, the alkali water electrolysis system is also provided, which comprises the electrolytic cell, the electrolytic cell is provided with an alkali water inlet, a first outlet, a second outlet, a cooling inlet and a cooling outlet; an alkali water cooling device, the alkali water cooling device is communicated with the alkali water inlet, and the alkali water cooling device is used for cooling the alkali water flowing into the electrolytic cell; an oxygen treatment device, the oxygen treatment device is used for separating oxygen from the alkali water, and the oxygen treatment device is communicated with the first outlet and the alkali water cooling device, so that the alkali water after the oxygen is separated is introduced into the alkali water cooling device; a hydrogen treatment device, the hydrogen treatment device is used for separating hydrogen from the alkali water, and the hydrogen treatment device is communicated with the second outlet and the alkali water cooling device, so that the alkali water after the hydrogen is separated is introduced into the alkali water cooling device; and an electrolytic cell cooling device, the electrolytic cell cooling device is communicated with the cooling inlet and the cooling outlet, and is used for supplying the cooling liquid to the cooling inlet and recovering the cooling liquid discharged from the cooling outlet.

[0021] Optionally, the electrolytic cell cooling device comprises a cooling liquid storage tank, a first cooler and a first liquid delivery pump, the cooling liquid storage tank comprises a water outlet and a water inlet, the first cooler is communicated with the water outlet and the first liquid delivery pump, the first liquid delivery pump is used for sending the cooling liquid cooled by the first cooler into the electrolytic cell through the cooling inlet, and the cooling outlet is communicated with the water inlet.

[0022] Optionally, the electrolytic cell cooling device further comprises a pressure regulating valve, the pressure regulating valve is arranged between the cooling outlet and the water inlet, and is used for controlling the flow of the cooling liquid.

[0023] On the basis of the above technical scheme, the alkali water electrolysis method is also provided, which uses the alkali water electrolysis system, and the alkali water electrolysis method comprises the following steps.

[0024] After the alkali water is cooled by the alkali water cooling device, the cooled alkali water is introduced into the electrolytic cell through the alkali water inlet, and power is supplied to the electrolytic cell to electrolyze the alkali water.

[0025] The oxygen generated by the alkali water electrolysis and part of the alkali water are introduced into the oxygen treatment device through the first outlet, and the hydrogen generated by the alkali water electrolysis and part of the alkali water are introduced into the hydrogen treatment device through the second outlet.

[0026] The oxygen treatment device separates the oxygen from the alkali water and introduces the treated alkali water into the alkali water cooling device, and the hydrogen treatment device separates the hydrogen from the alkali water and introduces the treated alkali water into the alkali water cooling device.

[0027] The alkali water cooling device cools the treated alkali water again and then introduces the cooled alkali water into the electrolytic cell.

[0028] The electrolytic cell cooling device passes the cooling liquid into the electrolytic cell through the cooling inlet, and the heat-exchanged cooling liquid flows back to the electrolytic cell cooling device after flowing out from the cooling outlet, and the electrolytic cell cooling device passes the heat-exchanged cooling liquid into the electrolytic cell again after cooling.

[0029] Through the above technical solution, in the process of electrolytic cell working, the cooling liquid flows into the cooling flow channel from the cooling liquid inlet, and the cooling liquid cools the pole frame during flowing through the cooling flow channel, and then flows out from the cooling liquid outlet, and the cooling liquid is continuously passed in to complete the cooling of the pole frame. In the process of cooling the pole frame, the pole frame and the sealing gasket are tightly attached together, so that the heat of the sealing gasket can be transferred to the pole frame, so that the pole frame and the sealing gasket can be cooled together by the cooling liquid. The expansion degree of the pole frame after temperature reduction is reduced, and the pressure of the pole frame on the sealing gasket is also reduced at this time. At the same time, the local environmental temperature of the sealing gasket between the two pole frames and the temperature of the sealing gasket itself are reduced. Under the conditions of reduced pressure, reduced local environmental temperature and reduced temperature, the cooled sealing gasket is not prone to creep. The present disclosure controls the temperature of the sealing gasket and the pole frame by controlling the temperature of the cooling liquid, reduces the degree of creep of the sealing gasket, and reduces the possibility of liquid leakage during the operation of the electrolytic cell. In the process of alkaline water electrolysis hydrogen production, the temperature rise of alkaline water can greatly improve the efficiency of the electrolytic cell and reduce the power consumption, and greatly improve the core performance of the product, but is limited by the high-temperature creep of the sealing gasket. The current mainstream process temperature is low. After the cooling flow channel is set, the cooling liquid is supplied into the electrolytic cell, and the circulation of the cooling liquid is realized, the temperature of the pole frame can be reduced, the temperature of the sealing gasket and the pole frame can be controlled, the degree of creep of the sealing gasket can be reduced, and the maximum process temperature allowed by electrolysis can be improved, and the direct current power consumption of hydrogen production can be reduced.

[0030] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and together with the following specific embodiments, serve to explain the present disclosure but do not constitute a limitation on the present disclosure. In the drawings:

[0032] Figure 1 is a structural schematic diagram of a pole frame provided by an embodiment of the present disclosure;

[0033] Figure 2 is Figure 1 is a local enlarged view of A in FIG. 8;

[0034] Figure 3 isFigure 1 A local enlarged view at B;

[0035] Figure 4 is a local structural schematic view of an electrolytic cell provided by the embodiments of the present disclosure;

[0036] Figure 5 is a schematic view of an alkali water electrolysis system provided by the embodiments of the present disclosure;

[0037] Figure 6 is a block diagram of an alkali water electrolysis method provided by the embodiments of the present disclosure.

[0038] Legend of Reference Signs

[0039] 1-pole frame; 11-coolant inlet; 111-liquid inlet sub-channel; 12-coolant outlet; 121-liquid outlet sub-channel; 13-cooling flow channel; 14-raw material inlet; 15-gas-liquid outlet; 2-sealing gasket; 21-liquid passing hole; 100-electrolytic cell; 101-alkali water inlet; 102-first outlet; 103-second outlet; 104-cooling inlet; 105-cooling outlet; 200-alkali water cooling device; 201-second cooler; 202-second liquid delivery pump; 300-oxygen treatment device; 301-oxygen separator; 302-first scrubber; 303-oxygen heat exchanger; 400-hydrogen treatment device; 401-hydrogen separator; 402-second scrubber; 403-hydrogen heat exchanger; 500-electrolytic cell cooling device; 501-coolant storage tank; 502-first cooler; 503-first liquid delivery pump; 504-pressure regulating valve. DETAILED DESCRIPTION

[0040] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0041] In the present disclosure, the orientation words such as “up, down” used herein generally refer to the “up, down” of the corresponding components in the use state along the direction of gravity, and “up, down” correspond to the upper orientation and lower orientation in Figures 1 to 4 “inner, outer” is relative to the “inner, outer” of the corresponding component itself contour; “far, near” refers to “far, near” compared to the contrast reference. In addition, the terms such as “first”, “second” used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance. Furthermore, in the following description, the same reference signs in different drawings represent the same or similar elements unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be understood as limiting the present disclosure.

[0042] According to a specific embodiment of this disclosure, refer to Figures 1 to 3 As shown, a pole frame is provided, the pole frame 1 having at least one coolant inlet 11 and at least one coolant outlet 12, and a cooling flow channel 13 is provided inside the pole frame 1, the coolant inlet 11 and the coolant outlet 12 being connected to the cooling flow channel 13.

[0043] Through the above technical solution, during the operation of the electrolytic cell, the coolant flows into the cooling channel 13 from the coolant inlet 11. As it flows through the cooling channel 13, it cools the electrode frame 1. Then, it flows out from the coolant outlet 12. Continuous cooling of the coolant completes the cooling of the electrode frame 1. During the cooling process, because the electrode frame 1 and the sealing gasket 2 are in close contact, the heat from the sealing gasket 2 can be transferred to the electrode frame 1, thus cooling both the electrode frame 1 and the sealing gasket 2 together through the coolant. The reduced expansion of the electrode frame 1 after the temperature decreases also reduces the pressure of the electrode frame 1 on the sealing gasket 2. Simultaneously, the local ambient temperature of the sealing gasket 2 located between the two electrode frames 1, as well as the temperature of the sealing gasket 2 itself, decreases. Under these conditions of reduced pressure, lower local ambient temperature, and lower temperature, the cooled sealing gasket 2 is less prone to creep. This disclosure controls the temperature of the sealing gasket 2 and the electrode frame 1 by controlling the temperature of the coolant, thereby reducing the creep of the sealing gasket 2 and lowering the possibility of leakage during electrolysis. Furthermore, in the alkaline water electrolysis hydrogen production process, increasing the temperature of the alkaline water can significantly improve the efficiency of the electrolyzer 100, reduce power consumption, and greatly enhance the core performance of the product. However, due to the limitation of high-temperature creep of the sealing gasket 2, the current mainstream process temperature is relatively low. By setting up the cooling channel 13, coolant is supplied into the electrolyzer 100, and the coolant is circulated, which can cool the electrode frame 1, thereby controlling the temperature of the sealing gasket 2 and the electrode frame 1, reducing the creep of the sealing gasket 2, increasing the allowable process temperature for electrolysis, and reducing the DC power consumption for hydrogen production.

[0044] Among them, reference Figures 1 to 3 As shown, the coolant inlet 11 and coolant outlet 12 can both be located on the end face of the pole frame 1 and extend through both sides of the pole frame 1. The cooling channel 13 can be a loop channel connected end to end, or it can be a collection of multiple independent channels. As long as each independent cooling channel 13 is connected to both the coolant inlet 11 and the coolant outlet 12 and allows coolant to flow in and out, the construction of the cooling channel 13 is not specifically limited here.

[0045] In the specific embodiments provided in this disclosure, reference is made to Figure 2As shown in the drawings, each cooling liquid inlet 11 can be communicated with the cooling flow channel 13 through at least one liquid inlet sub-channel 111, through which the cooling liquid is guided to flow into the cooling flow channel 13. The length of the liquid inlet sub-channel 111 can be 10-20 mm, and the width can be 3-5 mm. The length of the liquid inlet sub-channel 111 in the present disclosure is the distance from the end of the liquid inlet sub-channel 111 communicated with the cooling liquid inlet 11 to the end of the liquid inlet sub-channel 111 communicated with the cooling flow channel 13, for example, the length of the liquid inlet sub-channel 111 can be 10 mm, 13 mm, 20 mm, etc., preferably, the length of the liquid inlet sub-channel 111 is 12-18 mm, which can be 12 mm, 17 mm, 18 mm, etc., more preferably, the length of the liquid inlet sub-channel 111 is 14-16 mm, which can be 14 mm, 15 mm, 16 mm, etc., most preferably, the length of the liquid inlet sub-channel 111 can be 15.5 mm. The width of the liquid inlet sub-channel 111 in the present disclosure refers to the dimension in the direction perpendicular to the length direction of the liquid inlet sub-channel 111 under the condition of viewing the end surface of the polar frame 1, for example, the width of the liquid inlet sub-channel 111 can be 3 mm, 3.5 mm, 4 mm, 5 mm, etc., preferably, the width of the liquid inlet sub-channel 111 is 3.6-4.3 mm, which can be 3.6 mm, 3.8 mm, 4.3 mm, etc., more preferably, the width of the liquid inlet sub-channel 111 is 3.8-4.2 mm, which can be 3.8 mm, 3.9 mm, 4.2 mm, etc., most preferably, the width of the liquid inlet sub-channel 111 can be 4.1 mm.

[0046] In the detailed description provided in the present disclosure, reference is made to Figure 3As shown in the drawings, each cooling liquid outlet 12 can be communicated with the cooling flow channel 13 through at least one liquid outlet sub-channel 121, through which the cooling liquid is guided to flow out of the cooling flow channel 13. The length of the liquid outlet sub-channel 121 can be 10-20 mm, and the width can be 3-5 mm. The length of the liquid outlet sub-channel 121 in the present disclosure is the distance from the end of the liquid outlet sub-channel 121 communicated with the cooling liquid outlet 12 to the end of the liquid outlet sub-channel 121 communicated with the cooling flow channel 13, for example, the length of the liquid outlet sub-channel 121 can be 10 mm, 13 mm, 20 mm, etc., preferably, the length of the liquid outlet sub-channel 121 is 12-18 mm, which can be 12 mm, 17 mm, 18 mm, etc., more preferably, the length of the liquid outlet sub-channel 121 is 14-16 mm, which can be 14 mm, 15 mm, 16 mm, etc., most preferably, the length of the liquid outlet sub-channel 121 can be 15.5 mm. The width of the liquid outlet sub-channel 121 in the present disclosure refers to the dimension in the direction perpendicular to the length direction of the liquid outlet sub-channel 121 in the case of viewing the end surface of the polar frame 1, for example, the width of the liquid outlet sub-channel 121 can be 3 mm, 3.5 mm, 4 mm, 5 mm, etc., preferably, the width of the liquid outlet sub-channel 121 is 3.6-4.3 mm, which can be 3.6 mm, 3.8 mm, 4.3 mm, etc., more preferably, the width of the liquid outlet sub-channel 121 is 3.8-4.2 mm, which can be 3.8 mm, 3.9 mm, 4.2 mm, etc., most preferably, the width of the liquid outlet sub-channel 121 can be 4.1 mm.

[0047] In the embodiments shown in the present disclosure, Figure 1 , Figure 2 and Figure 3 , the polar frame 1 can be provided with both the liquid inlet sub-channel 111 and the liquid outlet sub-channel 121, one end of the liquid inlet sub-channel 111 is communicated with the cooling liquid inlet 11, and the other end is communicated with the cooling flow channel 13, one end of the liquid outlet sub-channel 121 is communicated with the cooling liquid outlet 12, and the other end is communicated with the cooling flow channel 13. In other embodiments, only the liquid inlet sub-channel 111 can be provided, in which case the cooling liquid outlet 12 can be directly communicated with the cooling flow channel 13, i.e., the edge of the cooling liquid outlet 12 is communicated with the edge of the cooling flow channel 13; or only the liquid outlet sub-channel 121 can be provided, in which case the cooling liquid inlet 11 can be directly communicated with the cooling flow channel 13, i.e., the edge of the cooling liquid inlet 11 is communicated with the edge of the cooling flow channel 13.

[0048] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2As shown in FIG. 1, the pole frame is configured as a ring shape, and the cooling liquid inlet 11 can be an arc-shaped waist hole and extend along the circumference of the pole frame. Through the above design, the configuration of the pole frame of the present disclosure can be adapted. The bending direction of the cooling liquid inlet 11 is consistent with the bending direction at the position of the pole frame where the cooling liquid inlet 11 is located.

[0049] In the specific embodiments provided by the present disclosure, reference is made to Figure 1 and Figure 3 As shown in FIG. 1, the pole frame is configured as a ring shape, and the cooling liquid inlet 11 can be an arc-shaped waist hole and extend along the circumference of the pole frame. Through the above design, the configuration of the pole frame of the present disclosure can be adapted. The bending direction of the cooling liquid inlet 11 is consistent with the bending direction at the position of the pole frame where the cooling liquid inlet 11 is located.

[0050] The present disclosure Figures 1 to 3 In the embodiments shown, the cooling liquid inlet 11 and the cooling liquid outlet 12 can both be arc-shaped waist holes. In other embodiments, only the cooling liquid inlet 11 can be an arc-shaped waist hole, and the cooling liquid outlet 12 can be a port-shaped through hole with a circular or square shape, and the present disclosure does not make specific limitations thereon; only the cooling liquid outlet 12 can be an arc-shaped waist hole, and the cooling liquid inlet 11 can be a port-shaped through hole with a circular or square shape, and the present disclosure does not make specific limitations thereon.

[0051] In the specific embodiments provided by the present disclosure, the length of the cooling liquid inlet 11 as described by the present disclosure is the size in the length direction of the waist hole structure, and the width of the cooling liquid inlet 11 as described by the present disclosure is the maximum size in the width direction of the waist hole structure when the front surface of the pole frame 1 is viewed, wherein each of the two ends of the length direction of the cooling liquid inlet 11 is provided with a semicircular inlet hole edge, and the diameter of the semicircular inlet hole edge is the width of the cooling liquid inlet 11. The length of the cooling liquid inlet 11 can be 50mm-130mm and the width can be 25mm-35mm. Through the above design, the cooling liquid inlet 11 in the size range is more suitable for the size of the pole frame 1 in actual operation. Among them, in the specific embodiments provided by the present disclosure, the length of the cooling liquid inlet 11 can be 50mm-130mm, and the width can be 25mm-35mm. Figure 1 、 Figure 2 and Figure 3In the shown embodiment, the length of the cooling liquid inlet 11 can be 50 mm, 70 mm, 130 mm, etc. Preferably, the length of the cooling liquid inlet 11 is 125 mm to 129 mm, which can be 125 mm, 127 mm, 129 mm, etc. More preferably, the length of the cooling liquid inlet 11 is 126 mm to 128.5 mm, which can be 126 mm, 128 mm, 128.5 mm, etc. Most preferably, the length of the cooling liquid inlet 11 is 128 mm. The width of the cooling liquid inlet 11 can be 25 mm, 30 mm, 35 mm, etc. Preferably, the width of the cooling liquid inlet 11 is 26 mm to 29 mm, which can be 26 mm, 27 mm, 29 mm, etc. More preferably, the width of the cooling liquid inlet 11 is 27.5 mm to 28.5 mm, which can be 27.5 mm, 27 mm, 28.5 mm, etc. Most preferably, the width of the cooling liquid inlet 11 is 28 mm. Since the diameter of the inlet hole edge is the same as the width of the cooling liquid inlet 11, it is not repeated here. When the width of the cooling liquid inlet 11 is most preferably 28 mm, the diameter of the inlet hole edge is 28 mm, and the radius is 14 mm.

[0052] In the specific embodiment provided in the present disclosure, the length of the cooling liquid outlet 12 is the size in the length direction of the waist hole structure, and the width of the cooling liquid outlet 12 is the maximum size in the width direction of the waist hole structure when the end surface of the pole frame 1 is viewed, wherein the two ends of the length direction of the cooling liquid outlet 12 are each provided with a semicircular outlet hole edge, and the diameter of the semicircular outlet hole edge is the width of the cooling liquid outlet 12. The length of the cooling liquid outlet 12 can be 50 mm to 130 mm and the width can be 25 mm to 35 mm. Through the above design, the cooling liquid outlet 12 in this size range is more suitable for the size of the pole frame 1 in actual operation. Among them, in the specific embodiment provided in the present disclosure, the length of the cooling liquid outlet 12 is 50 mm to 130 mm, which can be 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, etc. Preferably, the length of the cooling liquid outlet 12 is 60 mm to 120 mm, which can be 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, etc. More preferably, the length of the cooling liquid outlet 12 is 70 mm to 110 mm, which can be 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, etc. Most preferably, the length of the cooling liquid outlet 12 is 80 mm to 100 mm, which can be 80 mm, 90 mm, 100 mm, etc. Figure 1 、 Figure 2 and Figure 3In the shown embodiment, the length of the cooling liquid outlet 12 can be 50 mm, 70 mm, 130 mm, etc., preferably, the length of the cooling liquid outlet 12 is 125-129 mm, which can be 125 mm, 127 mm, 129 mm, etc., more preferably, the length of the cooling liquid outlet 12 is 126-128.5 mm, which can be 126 mm, 128 mm, 128.5 mm, etc., most preferably, the length of the cooling liquid outlet 12 is 128 mm. The width of the cooling liquid outlet 12 can be 25 mm, 30 mm, 35 mm, etc., preferably, the width of the cooling liquid outlet 12 is 26-29 mm, which can be 26 mm, 27 mm, 29 mm, etc., more preferably, the width of the cooling liquid outlet 12 is 27.5-28.5 mm, which can be 27.5 mm, 27 mm, 28.5 mm, etc., most preferably, the width of the cooling liquid outlet 12 is 28 mm. Since the diameter of the outlet hole edge is the same as the width of the cooling liquid outlet 12, it is not repeated here, when the width of the cooling liquid outlet 12 is most preferably 28 mm, the diameter of the outlet hole edge is 28 mm, and the radius is 14 mm.

[0053] In other embodiments, the cooling liquid inlet 11 and the cooling liquid outlet 12 can be constructed in any suitable shape according to actual needs, wherein the cooling liquid inlet 11 and the cooling liquid outlet 12 can have the same shape or different shapes, and the present disclosure does not make specific limitations hereon.

[0054] In the specific embodiments provided by the present disclosure, reference is made to Figures 1 to 3 As shown, one cooling liquid inlet 11 and one cooling liquid outlet 12 are provided, the cooling liquid inlet 11 is communicated with the cooling flow channel 13 through three liquid inlet sub-channels 111, and the cooling liquid outlet 12 is communicated with the cooling flow channel 13 through three liquid outlet sub-channels 121. Through the above design, one cooling liquid inlet 11 and one cooling liquid outlet 12 can meet the needs of the cooling liquid inlet and outlet, and through a large number of tests, the conductive effect is better when the liquid inlet sub-channels 111 and the liquid outlet sub-channels 121 are each provided with three, so it is the preferred scheme. In other embodiments, the cooling liquid inlet 11 and the cooling liquid outlet 12 on the pole piece 1 can be provided with two or more, the liquid inlet sub-channels 111 between the cooling liquid inlet 11 and the cooling flow channel 13 can be provided with one, two, four, etc., and the liquid outlet sub-channels 121 between the cooling liquid outlet 12 and the cooling flow channel 13 can also be provided with one, two, four, etc., and the present disclosure does not make specific limitations hereon.

[0055] In the specific embodiments provided by the present disclosure, reference is made to Figure 1 , Figure 2 and Figure 3As shown, the pole frame 1 is configured as a ring shape and has an outer edge, and the cooling flow channel 13 is formed at the outer edge and is configured as a ring shape. Generally, the pole frame 1 is in a ring shape, and by designing the cooling flow channel 13 as a ring shape, not only the shape of the pole frame 1 can be matched, but also the cooling flow channel 13 can form a loop, and when the cooling liquid flows through the entire ring-shaped cooling flow channel 13 from the cooling liquid inlet 11, the cooling liquid can cool the entire pole frame 1, and the pole frame 1 is usually provided with some liquid inlet holes or liquid outlet and gas outlet holes required for electrolysis. The cooling flow channel 13 is arranged at the edge to avoid the through holes arranged on the pole frame 1. The cooling flow channel 13 is a ring-shaped passage flow channel and is arranged around the cooling liquid inlet 11 and the cooling liquid outlet 12 and is formed at the outer edge of the pole frame 1. The cooling liquid inlet 11 is in communication with the cooling flow channel 13 through the liquid inlet sub-channel 111, and the cooling liquid outlet 12 is in communication with the cooling flow channel 13 through the liquid outlet sub-channel 121.

[0056] In other embodiments, the cooling flow channel 13 can be a semi-ring structure and is provided with two cooling flow channels 13, and the two cooling flow channels 13 are not in communication with each other and are arranged around the edge of the pole frame 1. Each cooling flow channel 13 is in communication with one cooling liquid inlet 11 and one cooling liquid outlet 12. The cooling flow channel 13 can also be in a circular arc shape, and a plurality of cooling flow channels 13 that are not in communication with each other are distributed along the circumference of the pole frame 1 to cover the pole frame 1. In this embodiment, the cooling liquid inlet 11 and the cooling liquid outlet 12 can be provided with a plurality of cooling liquid inlets 11 and a plurality of cooling liquid outlets 12, so that each cooling flow channel 13 is in communication with at least one cooling liquid inlet 11 and one cooling liquid outlet 12.

[0057] In the specific embodiments provided in the present disclosure, with reference to Figure 1 , Figure 2 and Figure 3 , the cooling liquid inlet 11 and the cooling liquid outlet 12 can correspond to each other, and the corresponding cooling liquid inlet 11 and the cooling liquid outlet 12 are located at two ends of the same radial axis of the pole frame. Through the above design, when the pole frame 1 is assembled, the cooling liquid inlet 11 is located above, and the cooling liquid outlet 12 is located below, and at this time, the positionally opposite cooling liquid inlet 11 and the cooling liquid outlet 12 can ensure that the cooling liquid flows uniformly and smoothly in the pole frame 1. Wherein, the relative arrangement in the present disclosure refers to that the positions of the cooling liquid inlet 11 and the cooling liquid outlet 12 are located at opposite two ends of the pole frame 1. When the cooling liquid inlet 11 and the cooling liquid outlet 12 are provided with a plurality of cooling liquid inlets 11 and a plurality of cooling liquid outlets 12, the position regions of the plurality of cooling liquid inlets 11 and the position regions of the plurality of cooling liquid outlets 12 are arranged oppositely.

[0058] In the specific embodiments provided in the present disclosure, with reference to Figure 1 , Figure 2 and Figure 3As shown, the plurality of through holes can be provided on the polar frame 1, the plurality of through holes are located on the same circumference and include the raw material inlet 14 and the gas-liquid outlet 15, the raw material inlet 14 and the gas-liquid outlet 15 are located on different sides of the polar frame 1, the cooling liquid inlet 11 is arranged close to the gas-liquid outlet 15, the cooling liquid outlet 12 is arranged close to the raw material inlet 14, and the cooling flow channel 13 is arranged around the plurality of through holes. Through the above design, the lye is introduced from the raw material inlet 14, and after electrolysis, the remaining liquid and the generated gas are discharged from the gas-liquid outlet 15. Since electrolysis is an exothermic process, the heat at the gas-liquid outlet 15 is the highest, and the position of the sealing gasket 2 at this point is also the most prone to creep. By arranging the cooling liquid inlet 11 close to the gas-liquid outlet 15, the cooling liquid first cools the position of the polar frame 1 with the highest temperature when it enters the electrolytic cell, and then cools other positions with lower temperatures during the downward flow of the cooling liquid, making the cooling process of the cooling liquid more targeted.

[0059] In order to adapt to the actual operation needs, in the specific embodiments provided by the present disclosure, the raw material inlet 14 and the gas-liquid outlet 15 can be arranged opposite to each other. Through the above design, when the polar frame 1 is assembled, the gas-liquid outlet 15 and the cooling liquid inlet 11 close to each other are located at the upper position of the polar frame 1, and the raw material inlet 14 and the cooling liquid outlet 12 close to each other are located at the lower position of the polar frame 1. At this time, the lye is introduced into the electrolytic cell from the lower raw material inlet 14 for electrolysis operation, and the generated gas can be smoothly discharged from the upper gas-liquid outlet 15, which is convenient for production. At the same time, the cooling liquid flows into the electrolytic cell from the upper cooling liquid inlet 11, flows through the entire cooling flow channel 13 from both sides under the action of gravity, and is discharged from the cooling liquid outlet 12. While ensuring efficient cooling, the smooth flow of the cooling liquid is realized.

[0060] Among them, the raw material inlet 14 and the gas-liquid outlet 15 can be both waist-shaped holes, and the sizes and shapes of the raw material inlet 14, the gas-liquid outlet 15, the cooling liquid inlet 11 and the cooling liquid outlet 12 can be the same or different. The relative arrangement described herein refers to the positions of the raw material inlet 14 and the gas-liquid outlet 15 being located at opposite ends of the polar frame 1. When the raw material inlet 14 and the gas-liquid outlet 15 are both provided with a plurality of holes, the position regions of the plurality of raw material inlets 14 and the position regions of the plurality of gas-liquid outlets 15 are arranged opposite to each other.

[0061] In the specific embodiments provided by the present disclosure, with reference to Figure 1 and Figure 2As shown, the gas-liquid outlet 15 can be provided with multiple and arranged at intervals along the circumference of the pole frame 1. The cooling liquid inlet 11 and the gas-liquid outlet 15 are located on the same circumference of the pole frame 1 and arranged at intervals. Through the above design, the cooling liquid inlet 11 is arranged in the area where the gas-liquid outlet 15 is distributed, and the cooling liquid flowing into the pole frame 1 can first cool the area where the gas-liquid outlet 15 is located, that is, first cool the area with the highest temperature of the pole frame 1, which can better achieve cooling.

[0062] In the embodiment shown, the cooling liquid inlet 11 is provided with one, and is located at the middle position of the distribution area of the plurality of gas-liquid outlets 15. A plurality of gas-liquid outlets 15 are arranged on both sides of the cooling liquid inlet 11, and the cooling liquid flowing into the cooling liquid inlet 11 flows through the cooling flow channel 13 from both sides. Figure 1 Figure 2 In the embodiment shown, the cooling liquid inlet 11 is provided with one, and is located at the middle position of the distribution area of the plurality of gas-liquid outlets 15. A plurality of gas-liquid outlets 15 are arranged on both sides of the cooling liquid inlet 11, and the cooling liquid flowing into the cooling liquid inlet 11 flows through the cooling flow channel 13 from both sides.

[0063] In the embodiment shown, the cooling liquid inlet 11 is provided with one, and is located at the middle position of the distribution area of the plurality of gas-liquid outlets 15. A plurality of gas-liquid outlets 15 are arranged on both sides of the cooling liquid inlet 11, and the cooling liquid flowing into the cooling liquid inlet 11 flows through the cooling flow channel 13 from both sides. Figure 1 Figure 3 As shown, the raw material inlet 14 can be provided with multiple and arranged at intervals along the circumference of the pole frame 1. The cooling liquid outlet 12 and the raw material inlet 14 are located on the same circumference of the pole frame 1 and arranged at intervals. Through the above design, the raw material inlet 14 area has a lower temperature than the gas-liquid outlet 15, and the cooling liquid outlet 12 is arranged at the raw material inlet 14 with lower temperature, so that the cooling liquid can first cool the high-temperature part of the pole frame 1.

[0064] In the embodiment shown, the cooling liquid outlet 12 is provided with one, and is located at the middle position of the distribution area of the plurality of raw material inlets 14. A plurality of raw material inlets 14 are arranged on both sides of the cooling liquid outlet 12, and the cooling liquid in the raw material inlet 14 flows to the cooling liquid outlet 12 from both sides. Figure 1 Figure 3 In the embodiment shown, the cooling liquid outlet 12 is provided with one, and is located at the middle position of the distribution area of the plurality of raw material inlets 14. A plurality of raw material inlets 14 are arranged on both sides of the cooling liquid outlet 12, and the cooling liquid in the raw material inlet 14 flows to the cooling liquid outlet 12 from both sides.

[0065] ​​​In other embodiments, the flow channel of the cooling liquid can be changed, the cooling liquid inlet 11 and the cooling liquid outlet 12 are both arranged on the outer peripheral wall of the polar frame 1, and a joint can be arranged at the cooling liquid inlet 11 and a joint can also be arranged at the cooling liquid outlet 12, which are welded on the polar frame. Among them, the joint is used to connect the pipeline outside through the sleeve, when a plurality of polar frames 1 are installed into the electrolytic cell, an inflow pipeline can be arranged for use, which can be a manifold and includes an inflow main pipe and a plurality of inflow branch pipes, the plurality of inflow branch pipes are in communication with the inflow main pipe, and each inflow branch pipe is in communication with the joint at the cooling liquid inlet 11 of each polar frame 1. When the cooling liquid is introduced into the inflow main pipe, the cooling liquid will flow into the cooling flow channel through the inflow branch pipe, so as to realize the input of the cooling liquid into the cooling flow channel 13 of each polar frame 1. An outflow pipeline can also be arranged, which can also be a manifold and include an outflow main pipe and a plurality of outflow branch pipes, the plurality of outflow branch pipes are in communication with the outflow main pipe, and each outflow branch pipe is in communication with the joint at the cooling liquid outlet 12. The cooling liquid in the cooling flow channel 13 is discharged by connecting the outflow pipeline outside. The circulation of the cooling liquid can also be realized by the above-mentioned manner, wherein the inflow pipeline and the outflow pipeline are both high polymer cooling pipelines, or other non-conductive materials can also be used.

[0066] On the basis of the above technical solutions, referring to Figure 4 The electrolytic cell 100 provided by the present disclosure also includes the polar frame 1. Through the above design, the polar frame 1 with the cooling effect can reduce the degree of creep of the sealing gasket 2. Among them, the electrolytic cell 100 also includes the sealing gasket 2, which is annular, and one sealing gasket 2 is coaxially arranged between two adjacent polar frames 1. The polar frame 1 and the sealing gasket 2 are arranged in close contact with each other, and the sealing gasket 2 is provided with a liquid passing hole 21. The number of liquid passing holes 21 on each sealing gasket 2 is the same as the sum of the number of cooling liquid inlets 11 and cooling liquid outlets 12 on each polar frame 1, and the position of the liquid passing hole 21 also corresponds to the cooling liquid inlet 11 or the cooling liquid outlet 12. When the sealing gasket 2 is clamped between two polar frames 1, the liquid passing hole 21 is used to connect the cooling liquid outlets 12 or the cooling liquid inlets 11 on both sides, and a plurality of cooling liquid inlets 11 and a plurality of liquid passing holes 21 form a liquid inlet channel, and a plurality of cooling liquid outlets 12 and a plurality of liquid passing holes 21 form a liquid outlet channel. Similarly, the sealing gasket 2 is also provided with a communication hole for connecting adjacent raw material inlets 14 or adjacent gas-liquid outlets 15, which is used for the flow of alkali water, hydrogen and oxygen.

[0067] In the specific embodiments provided by the present disclosure, referring to Figure 4 and Figure 5As shown, the raw material inlet 14 and the gas-liquid outlet 15 are arranged on the pole frame 1, the electrolytic tank 100 is provided with an alkali water inlet 101, a first outlet 102, a second outlet 103, a cooling inlet 104 and a cooling outlet 105, the alkali water inlet 101 is communicated with the raw material inlet 14, the first outlet 102 is communicated with the gas-liquid outlet 15 for discharging oxygen and alkali water, the second outlet 103 is communicated with the gas-liquid outlet 15 for discharging hydrogen and alkali water, the cooling inlet 104 is communicated with the cooling liquid inlet 11, and the cooling outlet 105 is communicated with the cooling liquid outlet 12. Through the above design, the electrolytic tank 100 is communicated with the external equipment, the feeding for electrolysis and the collection of gas are realized, and the cooling liquid is beneficial to the inlet and outlet.

[0068] As shown in the formula (I), the reference Figure 4 and Figure 5 As shown, the two ends of the electrolytic tank 100 can be provided with end plates, and the alkali water inlet 101, the first outlet 102, the second outlet 103, the cooling inlet 104 and the cooling outlet 105 can be arranged on the end plates. The alkali water flows into the alkali water inlet 101, flows through the channel in the electrolytic tank 100 and is electrolyzed, the produced oxygen is discharged from the first outlet 102 together with part of the alkali water, and the produced hydrogen is discharged from the second outlet 103 together with part of the alkali water. The cooling liquid flows into the cooling inlet 104, flows through the liquid inlet channel formed by the plurality of cooling liquid inlets 11 and the plurality of liquid passing holes 21, and then flows through the liquid outlet channel formed by the plurality of cooling liquid outlets 12 and the plurality of liquid passing holes 21, and finally is discharged from the cooling outlet 105. When the electrolytic tank 100 is installed, the cooling liquid inlet 11 and the gas-liquid outlet 15 are located at the upper position of the electrolytic tank 100, which is also the area with higher temperature of the sealing gasket 2 during electrolysis of the electrolytic tank 100, and the position of the sealing gasket 2 is also the most prone to creep. The cooling liquid outlet 12 and the raw material inlet 14 are located at the lower position of the electrolytic tank, which is also the area with lower temperature of the sealing gasket 2 during electrolysis of the electrolytic tank 100. The cooling liquid inlet 11 is arranged near the gas-liquid outlet 15, so that the cooling liquid enters from the upper position of the electrolytic tank 100. The cooling liquid first cools the position with the highest temperature of the pole frame 1, and then cools other positions with lower temperature during the downward flow of the cooling liquid, so that the cooling process of the cooling liquid on the pole frame 1 is more targeted.

[0069] In other embodiments, the cooling inlet 104 can be located on any of the electrode frames 1. This is because, based on the overall temperature distribution during operation of the electrolytic cell 100, which is typically composed of multiple electrolytic units connected in series or parallel, experimental results show that the temperature of the middle electrolytic unit is higher than that of the units at both ends. Considering both experimental results and cost, the cooling inlet 104 can be located on the end plate or on the electrolytic unit with the higher temperature. Therefore, the cooling inlet 104 can be located on the electrode frame 1 in the middle of the electrolytic cell 100 where the temperature is higher, allowing the coolant to flow in from the higher temperature position of the electrolytic cell 100, thus enabling targeted cooling of the electrolytic cell 100. Similarly, the cooling outlet 105 can also be located on any of the electrode frames 1, preferably on the electrode frame 1 with the lower temperature.

[0070] In other embodiments, when both the coolant inlet 11 and the coolant outlet 12 are located on the outer peripheral wall of the electrode frame 1 and are equipped with connectors, and the electrolytic cell 100 circulates and supplies coolant through the aforementioned external inflow and outflow pipes, the sealing gasket 2 may not have a liquid passage hole 21. In this case, only the alkaline water inlet 101, the first outlet 102, and the second outlet 103 may be located on the end plate, the cooling inlet 104 may be located at the port of the main inflow pipe, and the cooling outlet 105 may be located at the port of the main outflow pipe. Based on the above technical solution, referring to... Figure 5 As shown, this disclosure also provides an alkaline water electrolysis system, including an electrolytic cell 100, which is provided with an alkaline water inlet 101, a first outlet 102, a second outlet 103, a cooling inlet 104, and a cooling outlet 105; an alkaline water cooling device 200, which is connected to the alkaline water inlet 101 and is used to cool the alkaline water flowing into the electrolytic cell 100; and an oxygen treatment device 300, which is used to separate oxygen from the alkaline water, and the oxygen treatment device 300 is connected to the first outlet 102 and the alkaline water cooling device. The device 200 is connected to allow the alkaline water after oxygen separation to be passed into the alkaline water cooling device 200; a hydrogen treatment device 400 is used to separate hydrogen from the alkaline water, and the hydrogen treatment device 400 is connected to the second outlet 103 and the alkaline water cooling device 200 to allow the alkaline water after hydrogen separation to be passed into the alkaline water cooling device 200; and an electrolytic cell cooling device 500 is connected to the cooling inlet 104 and the cooling outlet 105 to supply coolant to the cooling inlet 104 and recover coolant discharged from the cooling outlet 105.

[0071] By the above design, the whole process operation of alkaline water electrolysis can be realized. In the process of hydrogen production by alkaline water electrolysis, the temperature rise of alkaline water can greatly improve the efficiency of the electrolytic cell 100, reduce the power consumption, and greatly improve the core performance of the product. However, it is limited by the high-temperature creep of the sealing gasket 2, and the current mainstream process temperature is ≤90℃. The electrolytic cell cooling device 500 is provided to supply cooling liquid into the electrolytic cell 100 and realize the circulating flow of the cooling liquid, which can realize the cooling of the pole frame 1, control the temperature of the sealing gasket 2 and the pole frame 1, reduce the creep degree of the sealing gasket 2, and can improve the process temperature allowed by electrolysis and reduce the direct current consumption of hydrogen production. At the same time, during electrolysis, the temperature of the alkaline water will rise, mainly because part of the overpotential voltage and current will generate heat, causing the temperature of the alkaline water to rise, and the reduction of power consumption will reduce the temperature rise of the alkaline water. Before the alkaline water is discharged from the electrolytic cell 100, treated by the oxygen treatment device 300 and the hydrogen treatment device 400, and then returned to the electrolytic cell 100, it needs to be cooled by the alkaline water cooling device 200. Due to the reduction of the temperature rise of the alkaline water, the load of the alkaline water cooling device 200 will also be reduced, thereby reducing the consumption of the cooling liquid during equipment operation and reducing the manufacturing cost of the alkaline water cooling device 200.

[0072] As shown in the reference Figure 5 The alkaline water cooling device 200 includes a second cooler 201 and a second liquid delivery pump 202. The second cooler 201 is connected to the circulating cooling liquid upper water pipe through one interface and connected to the circulating water return pipe through the other interface. The second liquid delivery pump 202 can be a centrifugal pump, which is used to pump the alkaline water cooled by the second cooler 201 into the electrolytic cell 100 through the alkaline water inlet 101. The oxygen treatment device 300 includes an oxygen separator 301, a first scrubber 302, and an oxygen heat exchanger 303. The oxygen separator 301 physically separates the oxygen from the alkaline water discharged together. The separated oxygen passes through the first scrubber 302 to remove the alkaline mist, and then the oxygen is introduced into the oxygen heat exchanger 303 for cooling, and then discharged and collected. The alkaline water washed by the first scrubber 302 flows back to the oxygen separator 301 and is introduced into the second cooler 201 together with the alkaline water in the oxygen separator 301 for cooling. The hydrogen treatment device 400 includes a hydrogen separator 401, a second scrubber 402, and a hydrogen heat exchanger 403. The hydrogen separator 401 physically separates the hydrogen from the alkaline water discharged together. The separated hydrogen passes through the second scrubber 402 to remove the alkaline mist, and then the hydrogen is introduced into the hydrogen heat exchanger 403 for cooling, and then discharged and collected. The alkaline water washed by the second scrubber 402 flows back to the hydrogen separator 401 and is introduced into the second cooler 201 together with the alkaline water in the hydrogen separator 401 for cooling. The second cooler 201 cools the alkaline water returned from the oxygen treatment device 300 and the hydrogen treatment device 400 and introduces it into the electrolytic cell 100.

[0073] On the basis of the above technical solutions, referring to Figure 5 As shown in the figure, the electrolytic tank cooling device 500 includes a cooling liquid storage tank 501, a first cooler 502, and a first liquid delivery pump 503. The cooling liquid storage tank 501 includes a water outlet and a water inlet. The first cooler 502 is connected to the water outlet and the first liquid delivery pump 503. The first liquid delivery pump 503 is used to send the cooling liquid cooled by the first cooler 502 into the electrolytic tank 100 through the cooling inlet 104. The cooling outlet 105 is connected to the water inlet. Through the above design, the electrolytic tank 100 can be continuously cooled. The first liquid delivery pump 503 is a centrifugal pump. One interface of the first cooler 502 is connected to a circulating cooling liquid water supply pipe, and the other interface is connected to a circulating water return pipe. The cooling liquid can be pure water.

[0074] On the basis of the above technical solutions, referring to Figure 5 As shown in the figure, the electrolytic tank cooling device 500 further includes a pressure regulating valve 504, which is arranged between the cooling outlet 105 and the water inlet, and is used to control the flow of the cooling liquid. Through the above design, the pressure of the cooling liquid in the electrolytic tank 100 can be controlled to be 3-20 bar. At the same time of controlling the flow of the cooling liquid, the pressure difference between the alkali water flow channel and the cooling liquid flow channel in the electrolytic tank 100 is reduced, and the sealing requirement between the polar frame 1 and the sealing gasket 2 is reduced.

[0075] On the basis of the above technical solutions, referring to Figure 6 As shown in the figure, the present disclosure also provides an alkali water electrolysis method using the above alkali water electrolysis system. The alkali water electrolysis method includes:

[0076] After the alkali water cooling device 200 cools the alkali water, the cooled alkali water is introduced into the electrolytic tank 100 through the alkali water inlet 101, and power is supplied to the electrolytic tank 100 to electrolyze the alkali water;

[0077] The oxygen generated by the alkali water electrolysis is introduced into the oxygen treatment device 300 together with part of the alkali water through the first outlet 102. The hydrogen generated by the alkali water electrolysis is introduced into the hydrogen treatment device 400 together with part of the alkali water through the second outlet 103.

[0078] The oxygen treatment device 300 separates the oxygen from the alkali water and introduces the treated alkali water into the alkali water cooling device 200. The hydrogen treatment device 400 separates the hydrogen from the alkali water and introduces the treated alkali water into the alkali water cooling device 200.

[0079] The alkali water cooling device 200 cools the treated alkali water and then introduces it into the electrolytic tank 100 again.

[0080] The electrolytic cell cooling device 500 passes the cooling liquid into the electrolytic cell 100 through the cooling inlet 104, and the cooled cooling liquid flows back to the electrolytic cell cooling device 500 after flowing out of the cooling outlet 105 after heat exchange, and the electrolytic cell cooling device 500 passes the cooling liquid after heat exchange into the electrolytic cell 100 again after cooling.

[0081] Through the above design, the temperature of the polar frame 1 and the sealing gasket 2 of the electrolytic cell 100 can be lowered while the alkaline water electrolysis is carried out, so as to control the temperature of the sealing gasket 2 and the polar frame 1, reduce the degree of creep of the sealing gasket 2, improve the process temperature allowed by electrolysis, and reduce the direct current consumption for hydrogen production. According to the statistics of laboratory operation data, under the current density of 2000-6000 A / m2, the alkaline water temperature (alkaline water temperature in the electrolytic cell) is 70-115℃, the direct current consumption is reduced by 0.25-0.41 kw / Nm 3 , and the energy efficiency is improved by 5-6%. Referring to Table 1, the electrolytic cell 100 without the cooling flow channel 13 in the market is used as a comparative example (the other structures and assembly conditions of the electrolytic cell are the same as those of the test example), the operating parameters are current density of 3000 A / m2, operating temperature (alkaline water temperature in the electrolytic cell 100) of 95℃, and the temperature of the polar frame sealing position is also 95℃, and the power consumption is 4.5-4.6 kw / Nm 3 . The electrolytic cell 100 provided with the cooling flow channel 13 is used as a test example, the current density is 3000 A / m2, the temperature of the sealing gasket 2 can be controlled below 93℃ by starting the electrolytic cell cooling device 500, the operating temperature (alkaline water temperature in the electrolytic cell 100) can be increased to 115℃, the energy efficiency is 81%, which is increased by 5-6% compared with the electrolytic cell 100 without the cooling flow channel 13. At the same time, the power consumption can be reduced to 4.32-4.37 kw / Nm 3 , and the power consumption is obviously reduced. At the same time, since the alkaline water temperature is reduced, the load of the alkaline water cooling device 200 is also reduced, so as to reduce the consumption of the cooling liquid during equipment operation, and also reduce the manufacturing cost of the alkaline water cooling device 200.

[0082]

[0083]

[0084] Table 1

[0085] The electrolytic cell cooling device 500 is continuously operated when the electrolytic cell 100 electrolyzes to produce hydrogen. The first cooler 502 cools the cooling liquid in the cooling liquid storage tank 501 and then sends it into the electrolytic cell 100 through the first liquid delivery pump 503. The cooled liquid flows back into the cooling liquid storage tank 501 after flowing out of the cooling outlet 105. When the electrolytic cell cooling device 500 sends the cooling liquid into the electrolytic cell 100, the cooling liquid flows in from the cooling inlet 104 located in the high-temperature area of the upper part of the electrolytic cell 100 and flows out from the cooling outlet 105 located in the low-temperature area of the lower part of the electrolytic cell 100.

[0086] The specific implementation principle of the present disclosure is that when the electrolytic cell 100 electrolyzes to produce hydrogen, the electrolytic cell cooling device 500 is arranged to cool the gasket 2. The cooling liquid is sent into the electrolytic cell 100, flows through the liquid inlet channel composed of the cooling liquid inlet 11 and the liquid passage 21, and then enters the cooling flow channel 13 through the liquid inlet sub-channel 111. The cooling liquid is then collected at the cooling liquid outlet 12 after flowing through the cooling flow channel 13, and finally flows out of the cooling liquid outlet 12. Then, the cooling liquid flows through the liquid outlet channel composed of the cooling liquid outlet 12 and the liquid passage 21, and finally flows out of the electrolytic cell 100, realizing the circulation of the cooling liquid. In this way, the temperature of the gasket 2 and the polar frame 1 is controlled by controlling the temperature of the cooling liquid, thereby reducing the degree of creep of the gasket 2 and reducing the possibility of liquid leakage during the operation of the electrolytic cell 100. At the same time, the process temperature allowed by the electrolysis can be improved, and the direct current consumption for hydrogen production can be reduced.

[0087] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0088] It should be noted that the various specific technical features described in the above-described specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0089] In addition, any combination of various different embodiments of the present disclosure can be made as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed by the present disclosure.

Claims

1. A pole frame, characterized by, The polar frame is provided with at least one cooling liquid inlet and at least one cooling liquid outlet, and a cooling flow channel is arranged in the polar frame, the cooling liquid inlet and the cooling liquid outlet are communicated with the cooling flow channel, the polar frame is configured as a ring shape, the polar frame has an outer edge, and the cooling flow channel is formed in the outer edge and configured as a ring shape.

2. The pole frame of claim 1, wherein, Each of the cooling liquid inlets is communicated with the cooling flow channel through at least one liquid inlet sub-channel, and / or each of the cooling liquid outlets is communicated with the cooling flow channel through at least one liquid outlet sub-channel.

3. The pole frame of claim 2, wherein, The length of the liquid inlet sub-channel and / or the liquid outlet sub-channel is 10mm-20mm, and the width is 3mm-5mm.

4. The pole frame of claim 1, wherein, The cooling liquid inlet and / or the cooling liquid outlet are arc-shaped waist holes and extend along the circumferential direction of the polar frame.

5. The pole frame of claim 4, wherein, The length of the cooling liquid inlet and / or the cooling liquid outlet is 50mm-130mm, and the width is 25mm-35mm.

6. The pole frame of claim 2, wherein, The cooling liquid inlet and the cooling liquid outlet are each provided with one, the cooling liquid inlet is communicated with the cooling flow channel through three liquid inlet sub-channels, and the cooling liquid outlet is communicated with the cooling flow channel through three liquid outlet sub-channels.

7. The pole frame of claim 4, wherein, The cooling liquid inlet and the cooling liquid outlet correspond to each other, and the corresponding cooling liquid inlet and cooling liquid outlet are located at two ends of the same radial axis of the polar frame.

8. The pole frame of any one of claims 1-7, wherein, A plurality of through holes are provided through the polar frame, a plurality of the through holes are located on the same circumference and include a raw material inlet and a gas-liquid outlet, the raw material inlet and the gas-liquid outlet are respectively located on different sides of the polar frame, the cooling liquid inlet is arranged close to the gas-liquid outlet, the cooling liquid outlet is arranged close to the raw material inlet, and the cooling flow channel is arranged around the plurality of through holes.

9. The pole frame of claim 8, wherein, The gas-liquid outlet is provided with a plurality of and is arranged at intervals along the circumferential direction of the polar frame, the cooling liquid inlet and the gas-liquid outlet are located on the same circumference of the polar frame, and are arranged at intervals with the gas-liquid outlet.

10. The pole frame of claim 8, wherein, The raw material inlet is provided with a plurality of and is arranged at intervals along the circumferential direction of the polar frame, the cooling liquid outlet and the raw material inlet are located on the same circumference of the polar frame, and are arranged at intervals with the raw material inlet.

11. The pole frame of claim 1, wherein, The polar frame is configured as a ring shape, the cooling liquid inlet and the cooling liquid outlet are both provided on the outer peripheral wall of the polar frame, and a joint is arranged at the cooling liquid inlet and / or the cooling liquid outlet.

12. An electrolytic cell characterized in that, The polar frame comprises the polar frame according to any one of claims 1-11.

13. The electrolytic cell of claim 12, wherein, The polar frame is provided with a raw material inlet and a gas-liquid outlet, the electrolytic cell is provided with a lye inlet, a first outlet, a second outlet, a cooling inlet and a cooling outlet, the lye inlet is communicated with the raw material inlet, the first outlet is communicated with the gas-liquid outlet for discharging oxygen and lye, the second outlet is communicated with the gas-liquid outlet for discharging hydrogen and lye, the cooling inlet is communicated with the cooling liquid inlet, and the cooling outlet is communicated with the cooling liquid outlet.

14. The electrolytic cell of claim 13, wherein, Both ends of the electrolytic cell are provided with end plates, and the cooling inlet is provided on the end plate or the polar frame.

15. An alkaline water electrolysis system, characterized in that, The electrolytic cell comprises The electrolytic cell of claim 12 or 13, wherein the electrolytic cell is provided with an alkali water inlet, a first outlet, a second outlet, a cooling inlet and a cooling outlet; an alkali water cooling device, which is in communication with the alkali water inlet, and which is used to cool the alkali water flowing into the electrolytic cell; an oxygen gas treatment device, which is used to separate oxygen gas from the alkali water, and which is in communication with the first outlet and the alkali water cooling device, so as to pass the alkali water after separation of oxygen gas into the alkali water cooling device; a hydrogen gas treatment device, which is used to separate hydrogen gas from the alkali water, and which is in communication with the second outlet and the alkali water cooling device, so as to pass the alkali water after separation of hydrogen gas into the alkali water cooling device; and an electrolytic cell cooling device, which is in communication with the cooling inlet and the cooling outlet, and which is used to supply cooling liquid to the cooling inlet, and to recover the cooling liquid discharged from the cooling outlet. The electrolytic cell cooling device comprises a cooling liquid storage tank, a first cooler and a first liquid delivery pump, the cooling liquid storage tank comprises a water outlet and a water inlet, the first cooler is in communication with the water outlet and the first liquid delivery pump, the first liquid delivery pump is used to pass the cooling liquid cooled by the first cooler into the electrolytic cell through the cooling inlet, and the cooling outlet is in communication with the water inlet.

16. The alkaline water electrolysis system of claim 15, characterized in that, The electrolytic cell cooling device further comprises a pressure regulating valve, which is arranged between the cooling outlet and the water inlet, and which is used to control the flow of the cooling liquid.

17. The alkaline water electrolysis system of claim 16, characterized in that, The alkali water electrolysis method using the alkali water electrolysis system according to any one of claims 15-17 comprises:

18. An alkaline water electrolysis method, characterized by, after the alkali water cooling device cools the alkali water, the cooled alkali water is passed into the electrolytic cell through the alkali water inlet, and the electrolytic cell is supplied with power to electrolyze the alkali water; the oxygen gas generated by the alkali water electrolysis and part of the alkali water are passed into the oxygen gas treatment device through the first outlet, and the hydrogen gas generated by the alkali water electrolysis and part of the alkali water are passed into the hydrogen gas treatment device through the second outlet; the oxygen gas treatment device separates oxygen gas from the alkali water, and passes the treated alkali water into the alkali water cooling device, and the hydrogen gas treatment device separates hydrogen gas from the alkali water, and passes the treated alkali water into the alkali water cooling device; the alkali water cooling device cools the treated alkali water again, and then passes the cooled alkali water into the electrolytic cell; the electrolytic cell cooling device passes cooling liquid into the electrolytic cell through the cooling inlet, the cooling liquid after heat exchange flows back to the electrolytic cell cooling device from the cooling outlet, and the electrolytic cell cooling device cools the cooling liquid after heat exchange again, and then passes the cooled cooling liquid into the electrolytic cell. ​

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