Electrolytic water hydrogen production equipment and dryer regeneration control method thereof

Abstract

The present invention discloses a water electrolysis hydrogen production equipment and a dryer regeneration control method thereof, wherein the water electrolysis hydrogen production equipment comprises an electrolytic cell, a separation and purification component, a dryer and a heat exchanger, wherein the separation and purification component is used to perform gas-liquid separation and purification on a gas-liquid mixture; the dryer is used to dry the gas; the heat exchanger has a first channel and a second channel, the outer wall of the first channel and the outer wall of the second channel are in contact with each other, so that the gas in the first channel and the gas in the second channel can exchange heat, the two ends of the first channel are respectively connected to the outlet of the electrolytic cell and the inlet of the separation and purification component, and the two ends of the second channel are respectively connected to the outlet of the separation and purification component and the inlet of the dryer. The technical solution of the present invention aims to reduce the energy consumption of desorption and regeneration of the dryer and reduce the comprehensive energy consumption of the water electrolysis hydrogen production equipment.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic hydrogen production, and in particular to a water electrolytic hydrogen production device and a dryer regeneration control method thereof. Background Art

[0002] In the existing water electrolysis hydrogen production equipment, most of them use a dryer equipped with an adsorbent to dry the hydrogen or oxygen after gas-liquid separation and purification to obtain a purer and drier gas.

[0003] In the existing dryer, when the adsorbent reaches adsorption saturation, the adsorbent needs to be desorbed and regenerated to recycle the adsorbent and ensure the normal operation of the dryer. At present, most of the purified gas is heated by a heater, and the high-temperature gas is allowed to enter the dryer to perform high-temperature desorption on the adsorbent to achieve adsorbent regeneration. However, the energy consumption of heating the gas by a heater is relatively high, which increases the overall energy consumption of the water electrolysis hydrogen production equipment, thereby resulting in high operating costs and poor economic performance of the water electrolysis hydrogen production equipment. Summary of the invention

[0004] The main purpose of the present invention is to provide a water electrolysis hydrogen production equipment, aiming to reduce the energy consumption of desorption and regeneration of the dryer and reduce the comprehensive energy consumption of the water electrolysis hydrogen production equipment.

[0005] To achieve the above-mentioned purpose, the water electrolysis hydrogen production equipment proposed in the present invention includes an electrolytic cell, a separation and purification component, a dryer and a heat exchanger, wherein the separation and purification component is used to separate and purify a gas-liquid mixture; the dryer is used to dry the gas; the heat exchanger has a first channel and a second channel, the outer wall of the first channel and the outer wall of the second channel are in contact with each other, so that the gas in the first channel and the gas in the second channel can exchange heat, the two ends of the first channel are respectively connected to the outlet of the electrolytic cell and the inlet of the separation and purification component, and the two ends of the second channel are respectively connected to the outlet of the separation and purification component and the inlet of the dryer.

[0006] Optionally, the outlet of the electrolytic cell is connected to the inlet of the separation and purification component.

[0007] Optionally, the electrolytic cell is provided with a first switch valve and a second switch valve, wherein the first switch valve is used to control the connection and closing of the electrolytic cell outlet with the first channel, and the second switch valve is used to control the connection and closing of the electrolytic cell outlet with the inlet of the separation and purification component.

[0008] Optionally, the outlet of the electrolytic cell is connected to a gas outlet main pipe, the gas outlet main pipe is connected to the first channel, the gas outlet main pipe is provided with a gas outlet branch pipe, and the gas outlet branch pipe is connected to the inlet of the separation and purification component. The first switch valve is arranged on the gas outlet main pipe and between the gas outlet branch pipe and the heat exchanger, and the second switch valve is arranged on the gas outlet branch pipe.

[0009] Optionally, the water electrolysis hydrogen production equipment further includes a control unit, and the control unit is electrically connected to the first switch valve and the second switch valve.

[0010] Optionally, a temperature sensor is provided in the dryer, the temperature sensor is electrically connected to the control unit, and the temperature sensor is used to detect the temperature in the dryer.

[0011] Optionally, a heating device is further provided in the dryer, and the heating device is electrically connected to the control unit, and the heating device is used to heat the dryer.

[0012] Optionally, the separation and purification component includes a gas-liquid separation device and a purification device, the inlet of the gas-liquid separation device is connected to the first channel; the inlet of the purification device is connected to the outlet of the gas-liquid separation device, and the outlet of the purification device is connected to the second channel, and the purification device is used to remove impurities and purify the gas.

[0013] Optionally, the heat exchanger includes a shell, a first heat exchange tube and a second heat exchange tube, and a accommodating cavity is formed in the shell; the first heat exchange tube is installed in the accommodating cavity and penetrates the accommodating cavity from bottom to top, and the first heat exchange tube forms the first channel; the second heat exchange tube is installed in the accommodating cavity and is wound around the first heat exchange tube, and the second heat exchange tube forms the second channel.

[0014] The present invention also provides a dryer regeneration control method for a water electrolysis hydrogen production device, wherein the water electrolysis hydrogen production device is the water electrolysis hydrogen production device described above, and the dryer regeneration control method comprises the following steps:

[0015] The electrolytic cell performs electrolysis until a first preset time;

[0016] The first switch valve is opened and the second switch valve is closed. The gas-liquid mixture outputted from the electrolytic cell enters the first channel of the heat exchanger, enters the separation and purification component to obtain low-temperature gas, and enters the second channel of the heat exchanger, so that the low-temperature gas exchanges heat with the high-temperature mixture in the first channel to obtain high-temperature gas;

[0017] The high-temperature gas in the second channel enters the dryer, so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer.

[0018] Optionally, after the step of allowing the high-temperature gas in the second channel to enter the dryer so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer, the method further comprises:

[0019] After the electrolysis of the electrolytic cell reaches a second preset time, the first switch valve is closed and the second switch valve is opened, and the gas-liquid mixture output by the electrolytic cell enters the separation and purification component, so that the gas-liquid mixture is separated and purified to obtain low-temperature gas;

[0020] The low-temperature gas output by the separation and purification component enters the dryer, so that the low-temperature gas cools the dryer.

[0021] Optionally, while the step of allowing the high-temperature gas in the second channel to enter the dryer so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer is performed, the step further includes:

[0022] Control the heating device in the dryer to start heating up;

[0023] At every third preset time interval, a temperature sensor in the dryer is activated to obtain the temperature of the dryer, and the detected temperature is compared with the preset temperature;

[0024] When the detected temperature is the same as the preset temperature, the heating device is stopped from continuing to heat up, and the heating device is controlled to maintain a constant temperature.

[0025] The technical solution of the present invention uses the first channel of the heat exchanger to connect the outlet of the electrolytic cell and the inlet of the separation and purification component, and uses the second channel of the heat exchanger to connect the outlet of the separation and purification component and the inlet of the dryer. The first channel can be used to transport the high-temperature gas-liquid mixture after electrolysis in the electrolytic cell to the separation and purification component for gas-liquid separation and impurity removal and purification, and the second channel can be used to transport the low-temperature gas processed by the separation and purification component to the dryer. Among them, by contacting the outer wall of the first channel with the outer wall of the second channel, the high-temperature gas-liquid mixture in the first channel and the low-temperature gas in the second channel can be heat-exchanged, and then the second channel can transport the high-temperature gas after heat exchange to the dryer, so that the high-temperature gas enters the dryer to heat the adsorbent in the dryer, so that the adsorbent is desorbed under the action of high temperature, thereby achieving the purpose of regenerating the adsorbent in the dryer.

[0026] Under the action of the heat exchanger, the heat generated by the electrolysis of the electrolytic cell can be heat-exchanged with the separated and purified gas through the gas-liquid mixture, so that the water electrolysis hydrogen production equipment can use the waste heat generated by the electrolysis of the electrolytic cell to heat the separated and purified gas, and apply it to the desorption regeneration of the dryer, which is beneficial to reduce the use of electric heaters in the water electrolysis hydrogen production equipment, reduce the regeneration energy consumption of the dryer, reduce the comprehensive energy consumption of the water electrolysis hydrogen production equipment, and fully improve the waste heat recovery and utilization of the water electrolysis hydrogen production equipment, further improving the practicability of the water electrolysis hydrogen production equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 This is a piping structure diagram of an embodiment of a water electrolysis hydrogen production device of the present invention;

[0029] Figure 2 for Figure 1 A piping structure diagram of an embodiment of a water electrolysis hydrogen production device in which an electrolytic cell is connected to a separation and purification component;

[0030] Figure 3 It is a flow chart of an embodiment of a dryer regeneration control method of a water electrolysis hydrogen production equipment according to the present invention;

[0031] Figure 4 A schematic diagram of a process for cooling the dryer after the dryer has completed desorption in an embodiment of a dryer regeneration control method for a hydrogen production device using electrolyzed water according to the present invention;

[0032] Figure 5 This is a schematic diagram of a flow chart of controlling auxiliary heating of a heating device in a dryer according to an embodiment of a dryer regeneration control method of a water electrolysis hydrogen production device of the present invention.

[0033] Description of Figure Numbers:

[0034] Label name Label name 100 Water electrolysis hydrogen production equipment 31 Gas-liquid separation device 10 Electrolytic Cell 33 Purification device 11 Gas outlet pipe 50 Dryer 111 First switch valve 70 Heat Exchanger 13 Outlet branch pipe 71 First Channel 113 Second switch valve 73 Second channel 30 Separation and purification components

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] In the existing dryer, when the adsorbent reaches adsorption saturation, the adsorbent needs to be desorbed and regenerated so that the adsorbent can be recycled and the normal operation of the dryer can be guaranteed. Currently, most of the purified gas is heated by a heater, and the high-temperature gas is allowed to enter the dryer to perform high-temperature desorption on the adsorbent to achieve regeneration of the adsorbent. However, the energy consumption of heating the gas by a heater is relatively large, which increases the overall energy consumption of the water electrolysis hydrogen production equipment, and further leads to higher operating costs and poor economic performance of the water electrolysis hydrogen production equipment. In view of the above problems, the present invention proposes a water electrolysis hydrogen production equipment 100.

[0041] Reference Figures 1 to 5In an embodiment of the present invention, the water electrolysis hydrogen production equipment 100 includes an electrolytic cell 10, a separation and purification component 30, a dryer 50 and a heat exchanger 70. The separation and purification component 30 is used to separate and purify the gas-liquid mixture; the dryer 50 is used to dry the gas; the heat exchanger 70 has a first channel 71 and a second channel 73, and the outer wall of the first channel 71 and the outer wall of the second channel 73 are in contact with each other, so that the gas in the first channel 71 and the gas in the second channel 73 can exchange heat, and the two ends of the first channel 71 are respectively connected to the outlet of the electrolytic cell 10 and the inlet of the separation and purification component 30, and the two ends of the second channel 73 are respectively connected to the outlet of the separation and purification component 30 and the inlet of the dryer 50.

[0042] It can be understood that the electrolytic cell 10 can be a container for producing hydrogen by electrolyzing water, and hydrogen is separated from the aqueous solution by electrolyzing an aqueous solution containing electrolytes using electric energy. However, the products produced by electrolysis in the electrolytic cell 10 are mostly in the form of a mixture of hydrogen and alkali solution. At this time, the products of the electrolytic cell 10 can be subjected to gas-liquid separation, deoxygenation purification, dehydration and drying steps to obtain hydrogen with higher purity, so as to achieve the purpose of electrolysis and hydrogen production of the electrolytic water hydrogen production equipment 100. Among them, the gas-liquid mixture needs to go through steps such as cyclone separation, static separation or catalytic deoxygenation in the separation and purification component 30, so that hydrogen with higher purity can be obtained after passing through the separation component, and the temperature of the gas-liquid mixture can be gradually reduced during the separation and purification process, so that gas with lower temperature can be obtained after passing through the separation and purification component 30. The dryer 50 can be a device for adsorbing and removing water from gas by using an adsorbent. By arranging adsorbents such as zeolite molecular sieves and carbon molecular sieves in the dryer 50, when the gas flows through the adsorbent, some water molecules in the gas collide with the surface of the adsorbent due to irregular motion, resulting in molecular concentration on the surface, thereby reducing the number of water molecules in the gas, achieving the purpose of separation and removal. However, after long-term use, the adsorbent in the dryer 50 is prone to reach a certain saturation state due to excessive adsorption of water molecules. In the saturated state, the adsorption performance of the adsorbent is poor. At this time, the adsorbent can be desorbed and regenerated by applying high temperature to the adsorbent to achieve the effect of recycling. During the electrolysis of the electrolytic cell 10, the electrolysis of the aqueous solution will generate a large amount of heat. At this time, the gas-liquid mixture output from the electrolytic cell 10 can carry a large amount of heat through the heat transfer of the electrolytic cell 10. Then, in the heat exchanger 70, the high-temperature gas-liquid mixture in the first channel 71 can exchange heat with the low-temperature gas in the second channel 73, so that the gas with a higher temperature can be transported into the dryer 50 through the second channel 73. Furthermore, inputting high-temperature gas into the dryer 50 can cause the adsorbent in the dryer 50 to be desorbed and reduced under the action of the high-temperature gas, thereby realizing the cyclic regeneration of the dryer 50, ensuring the stable and effective operation of the water electrolysis hydrogen production equipment 100, and improving the practicality of the water electrolysis hydrogen production equipment 100.

[0043] The technical solution of the present invention uses the first channel 71 of the heat exchanger 70 to connect the outlet of the electrolytic cell 10 and the inlet of the separation and purification component 30, and uses the second channel 73 of the heat exchanger 70 to connect the outlet of the separation and purification component 30 and the inlet of the dryer 50. The first channel 71 can be used to transport the high-temperature gas-liquid mixture after electrolysis in the electrolytic cell 10 to the separation and purification component 30 for gas-liquid separation and impurity removal and purification, and the second channel 73 can be used to transport the low-temperature gas processed by the separation and purification component 30 to the dryer 50. Among them, by contacting the outer wall of the first channel 71 with the outer wall of the second channel 73, the high-temperature gas-liquid mixture in the first channel 71 and the low-temperature gas in the second channel 73 can be heat-exchanged, and then the second channel 73 can transport the high-temperature gas after heat exchange to the dryer 50, so that the high-temperature gas enters the dryer 50 to heat the adsorbent in the dryer 50, so that the adsorbent is desorbed under the action of high temperature, thereby achieving the purpose of regenerating the adsorbent in the dryer 50.

[0044] Under the action of the heat exchanger 70, the heat generated by the electrolysis of the electrolytic cell 10 can be heat-exchanged with the separated and purified gas through the gas-liquid mixture, so that the water electrolysis hydrogen production equipment 100 can use the waste heat generated by the electrolysis of the electrolytic cell 10 to heat the separated and purified gas, and apply it to the desorption regeneration of the dryer 50, which is beneficial to reduce the use of electric heaters in the water electrolysis hydrogen production equipment 100, reduce the regeneration energy consumption of the dryer 50, reduce the comprehensive energy consumption of the water electrolysis hydrogen production equipment 100, and fully improve the waste heat recovery and utilization of the water electrolysis hydrogen production equipment 100, further improving the practicability of the water electrolysis hydrogen production equipment 100.

[0045] Reference Figure 2 In one embodiment of the present invention, the outlet of the electrolytic cell 10 is connected to the inlet of the separation and purification component 30.

[0046] In this embodiment, by connecting the outlet of the electrolytic cell 10 with the inlet of the separation and purification component 30, the gas-liquid mixture with a relatively high temperature output by the electrolytic cell 10 can enter the heat exchanger 70 and the separation and purification component 30 at the same time, so that the separation and purification component 30 can quickly output low-temperature gas into the second channel 73 to exchange heat with the gas-liquid mixture in the first channel 71, thereby effectively improving the heat exchange efficiency of the heat exchanger 70 and improving the reduction and regeneration efficiency of the dryer 50. Furthermore, after the desorption of the adsorbent in the dryer 50 is completed, the connection between the electrolytic cell 10 and the heat exchanger 70 can be closed, and the connection between the electrolytic cell 10 and the separation and purification component 30 can be maintained. At this time, no high-temperature gas-liquid mixture passes through the first channel 71, and the second channel 73 does not need to exchange heat with the first channel 71, so that the gas entering the dryer 50 through the heat exchanger 70 is a low-temperature gas. Under the action of the low-temperature gas, the adsorbent that has completed desorption under the action of high temperature can be cooled, so that the adsorbent can be restored to a normal working state, achieving better adsorption and dehydration, ensuring the normal operation of the water electrolysis hydrogen production equipment 100, and further improving the reliability and practicality of the water electrolysis hydrogen production equipment 100.

[0047] Further, refer to Figure 2 In one embodiment of the present invention, the electrolytic cell 10 is provided with a first switch valve 111 and a second switch valve 113. The first switch valve 111 is used to control the connection and closing between the outlet of the electrolytic cell 10 and the first channel 71, and the second switch valve 113 is used to control the connection and closing between the outlet of the electrolytic cell 10 and the inlet of the separation and purification component 30.

[0048] In this embodiment, by setting the first switch valve 111 and the second switch valve 113 on the electrolytic cell 10, the first switch valve 111 and the second switch valve 113 can be used to control the flow direction of the gas-liquid mixture after electrolysis in the electrolytic cell 10, so that the gas-liquid mixture can flow to the heat exchanger 70 or the separation and purification component 30 better, so as to achieve the function of high-temperature desorption reduction or cooling of the adsorbent in the dryer 50. Among them, the first switch valve 111 and the second switch valve 113 can be set at the outlet of the electrolytic cell 10, or can be respectively set on the pipeline connecting the electrolytic cell 10 to the heat exchanger 70 and the separation and purification component 30, so as to better control the flow direction and reverse flow of the electrolyzed product in the electrolytic cell 10, and further improve the operation convenience of the water electrolysis hydrogen production equipment 100. Secondly, the first switch valve 111 and the second switch valve 113 can be manually operated valves, so that the user can control the electrolytic cell 10 by observing the operation of the dryer 50 or manually operating the first switch valve 111 and the second switch valve 113 at a fixed time; or the first switch valve 111 and the second switch valve 113 can be electrically controlled valves, and the opening and closing of the first switch valve 111 and the second switch valve 113 can be controlled by program timing or remote control, so as to achieve better electrical automation control of the water electrolysis hydrogen production equipment 100, thereby further improving the practicality of the water electrolysis hydrogen production equipment 100.

[0049] Further, refer to Figure 2 In one embodiment of the present invention, the outlet of the electrolytic cell 10 is connected to a gas outlet main pipe 11, the gas outlet main pipe 11 is connected to the first channel 71, and the gas outlet main pipe 11 is provided with a gas outlet branch pipe 13, and the gas outlet branch pipe 13 is connected to the inlet of the separation and purification component 30. The first switch valve 111 is provided on the gas outlet main pipe 11 and is provided between the gas outlet branch pipe 13 and the heat exchanger 70, and the second switch valve 113 is provided on the gas outlet branch pipe 13.

[0050] It can be understood that the water electrolysis hydrogen production equipment 100 can use pipelines to connect various devices, and use pipelines to transport fluid media to achieve connectivity between various devices, which is conducive to better regulation and control of various devices, achieving better overall control of the water electrolysis hydrogen production equipment 100, and further improving the practicality of the water electrolysis hydrogen production equipment 100. In the present embodiment, by opening an outlet branch pipe 13 on the outlet main pipe 11 connecting the electrolytic cell 10 to the heat exchanger 70 to connect to the separation and purification component 30, the outlet settings on the electrolytic cell 10 can be reduced, which is conducive to better simplifying the structure of the electrolytic water hydrogen production equipment 100; at the same time, by arranging the first switch valve 111 on the outlet main pipe 11 and between the outlet branch pipe 13 and the heat exchanger 70, and arranging the second switch valve 113 on the outlet branch pipe 13, the opening and closing of the first switch valve 111 and the second switch valve 113 can be better operated on the pipeline, and then the flow direction of the gas-liquid mixture is regulated by using the branch on the pipeline. Compared with the method of operating the first switch valve 111 and the second switch valve 113 on the electrolytic cell 10 to control the flow direction of the gas-liquid mixture, it is conducive to better improving the user's operational convenience for changing the flow direction, and further improving the practicality of the electrolytic water hydrogen production equipment 100.

[0051] Furthermore, in one embodiment of the present invention, the water electrolysis hydrogen production equipment 100 further includes a control unit, and the control unit is electrically connected to the first switch valve 111 and the second switch valve 113 .

[0052] It is understandable that the control unit may be a controller or a central control device that performs overall control of the water electrolysis hydrogen production equipment 100, so as to electrically regulate the overall operation of the water electrolysis hydrogen production equipment 100, which is conducive to enabling the water electrolysis hydrogen production equipment 100 to respond to operation more quickly, and further improve the operational convenience of the water electrolysis hydrogen production equipment 100. Among them, the control unit may be a programmable logic controller or a timing controller storing a control program, so that the user can automatically control the control unit to control the opening and closing of the first switch valve 111 or the second switch valve 113 according to the preset program required, so as to better realize the automatic control of the water electrolysis hydrogen production equipment 100, improve the user's operational convenience, and reduce labor costs.

[0053] Furthermore, in one embodiment of the present invention, a temperature sensor is provided in the dryer 50 . The temperature sensor is electrically connected to the control unit. The temperature sensor is used to detect the temperature in the dryer 50 .

[0054] In this embodiment, by setting a temperature sensor in the dryer 50, the temperature sensor can be used to detect the temperature of the dryer 50 at regular intervals during the high-temperature desorption of the adsorbent, and the user is warned when the detected temperature is too high, so that the user can control the temperature of the dryer 50 to avoid the temperature in the dryer 50 being too high and damaging the adsorbent with a certain probability, affecting the dehumidification effect of the adsorbent, ensuring the normal operation of the electrolytic water hydrogen production equipment 100, and further improving the stability and reliability of the electrolytic water hydrogen production equipment 100. Among them, the temperature sensor can be regulated by the control unit, so that the user can better observe the operating status of the temperature sensor through the control unit, and can control the temperature sensor to a certain extent. At the same time, the control unit can be provided with a display screen, a warning light, and a warning speaker, so that the temperature detected by the temperature sensor can be displayed on the display screen of the control unit, which is convenient for the user to obtain the temperature information in the dryer 50 in real time, and when the temperature is detected to be too high, a warning signal can be issued through the warning light and the warning speaker, so that the user can respond quickly and regulate the temperature of the dryer 50 in time, thereby improving the practicality of the electrolytic water hydrogen production equipment 100.

[0055] In one embodiment of the present invention, a heating device is further provided in the dryer 50 . The heating device is electrically connected to the control unit and is used to heat the dryer 50 .

[0056] It can be understood that the heating device can be a heater arranged at the inlet of the gas entering the dryer 50 to heat the gas, so that the high-temperature gas performing heat exchange in the heat exchanger 70 can further increase the temperature under the action of the heating device, so that the adsorbent in the dryer 50 can be heated under the action of the higher temperature gas; or it can be a heater arranged inside the dryer 50 to heat the adsorbent, so that the adsorbent in the dryer 50 can be desorbed and regenerated more quickly under the action of a higher temperature, which is beneficial to improving the regeneration efficiency of the dryer 50 of the water electrolysis hydrogen production equipment 100, and further improving the practicality of the water electrolysis hydrogen production equipment 100.

[0057] Reference Figure 1 and Figure 2 In one embodiment of the present invention, the separation and purification component 30 includes a gas-liquid separation device 31 and a purification device 33. The inlet of the gas-liquid separation device 31 is connected to the first channel 71; the inlet of the purification device 33 is connected to the outlet of the gas-liquid separation device 31, and the outlet of the purification device 33 is connected to the second channel 73. The purification device 33 is used to remove impurities and purify the gas.

[0058] In this embodiment, the gas-liquid separation device 31 can be a gas-liquid separator that uses gravity separation or centrifugal separation to separate the gas and liquid phases in the gas-liquid mixture. The gas-liquid separation device 31 can be used to separate the gas and alkali solution separated by electrolysis of water, so that the gas can be output from the gas-liquid separation device 31 to enter the next processing step and the alkali solution can be recovered. The gas output by the gas-liquid separation device 31 usually contains other gas molecules. At this time, the gas-liquid separation device 31 is connected to the purification device 33, and the catalyst in the purification device 33 can be used to act on the gas output by the gas-liquid separation device 31, so that other gas molecules impure in the gas can be catalytically reduced under the action of the catalyst, and then the gas can be effectively impurity-removed, further improving the purification effect of the separation and purification component 30, so that the gas-liquid mixture can be converted into a gas with higher purity under the action of the separation and purification component 30, ensuring the normal operation of the electrolysis water hydrogen production equipment 100. Among them, since the gas-liquid mixture needs to go through multiple steps in the separation and purification component 30 to obtain a gas with a higher purity, during this process, the temperature carried by the gas-liquid mixture gradually decreases, thereby making the temperature of the gas output by the separation and purification component 30 lower, which is convenient for introducing the gas into the heat exchanger 70 for heat exchange to perform high-temperature desorption in the dryer 50, and using the gas with a lower temperature to input into the dryer 50 to cool the desorbed adsorbent, thereby ensuring the recycling of the dryer 50.

[0059] In one embodiment of the present invention, the heat exchanger 70 includes a shell, a first heat exchange tube and a second heat exchange tube, and a receiving cavity is formed in the shell; the first heat exchange tube is installed in the receiving cavity and penetrates the receiving cavity from bottom to top, and the first heat exchange tube forms a first channel 71; the second heat exchange tube is installed in the receiving cavity and is wound around the first heat exchange tube, and the second heat exchange tube forms a second channel 73.

[0060] In this embodiment, the heat exchanger 70 can better exchange heat between the high-temperature gas-liquid mixture in the first channel 71 and the gas in the second channel 73 by arranging the first heat exchange tube and the second heat exchange tube surrounding each other in the shell, thereby ensuring the heat exchange efficiency and heat exchange effect of the heat exchanger 70. The first heat exchange tube and the second heat exchange tube can be made of copper tubes or aluminum alloy tubes with good thermal conductivity, which is convenient for disassembly and maintenance of the heat exchanger 70, and can make the overall heat exchange efficiency of the heat exchanger 70 higher, further improve the waste heat utilization rate of the electrolytic cell 10, and improve the practicality of the water electrolysis hydrogen production equipment 100.

[0061] Secondly, in other embodiments, the heat exchanger 70 may also form a liquid conducting cavity in the accommodating cavity to connect the electrolytic cell 10 and the separation and purification component 30, so that the liquid conducting cavity is formed as a first channel 71, and a heat conducting pipe is arranged in the liquid conducting cavity to connect the separation and purification component 30 and the dryer 50, so that the heat conducting pipe is formed as a second channel 73, so that the gas in the heat conducting pipe can exchange heat with the gas-liquid mixture in the liquid conducting cavity, so as to achieve the effect of utilizing the waste heat generated by electrolysis of the electrolytic cell 10. The use of the liquid conducting cavity and the liquid conducting pipe can make the heat exchange area of ​​the heat exchanger 70 larger, and further improve the heat exchange efficiency and heat exchange effect of the heat exchanger 70.

[0062] The present invention also provides a regeneration control method for the dryer 50 of the water electrolysis hydrogen production equipment 100. The specific structure of the water electrolysis hydrogen production equipment 100 is referred to the above embodiment. Figure 3 , Figure 3 The flowchart is a schematic diagram of the first embodiment of the regeneration control method of the dryer 50 of the water electrolysis hydrogen production equipment 100 of the present invention. The embodiment of the present application provides an embodiment of the regeneration control method of the dryer 50. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in a different order than here.

[0063] In this embodiment, the regeneration control method of the dryer 50 includes:

[0064] Step S10: The electrolytic cell 10 performs electrolysis until a first preset time;

[0065] It is understandable that after the controller controls the water electrolysis hydrogen production equipment 100 to start operation, the water electrolysis hydrogen production equipment 100 sequentially operates the processes of starting the electrolytic cell 10 for electrolysis and delivering the electrolysis product to the separation and purification component 30, starting the separation and purification component 30 for gas-liquid separation and purification of the electrolysis product and delivering the purified gas to the dryer 50, and starting the dryer 50 for drying the gas. Among them, the adsorbent in the dryer 50 will reach a saturated state when adsorbing a certain volume of gas, making the subsequent adsorption effect poor. Therefore, the first preset time may be the moment when the amount of gas generated by electrolysis in the electrolytic cell 10 makes the adsorbent about to reach a saturated state or has just reached a saturated state, so that when the electrolytic cell 10 electrolyzes to the first preset time, the normal operation of the water electrolysis hydrogen production equipment 100 can be temporarily stopped, and the dryer 50 can continue to dehydrate the gas after desorption and reduction; or multiple dryers 50 can be set on the water electrolysis hydrogen production equipment 100, and when it works to the first preset time, the output flow direction of the gas is changed, so that the gas flows into another dryer 50 whose adsorbent has not yet reached a saturated state, and the dryer 50 that has reached a saturated state stops working and desorption and reduction is performed, so as to better enable the water electrolysis equipment to operate uninterruptedly and ensure the output of the water electrolysis hydrogen production equipment 100.

[0066] Step S20: Open the first switch valve 111 and close the second switch valve 113. The gas-liquid mixture outputted from the electrolytic cell 10 enters the first channel 71 of the heat exchanger 70, enters the separation and purification component 30 to obtain low-temperature gas, and enters the second channel 73 of the heat exchanger 70, so that the low-temperature gas exchanges heat with the high-temperature mixture in the first channel 71 to obtain high-temperature gas.

[0067] It can be understood that when the electrolytic cell 10 works for the first preset time, the dryer 50 needs to be desorbed and reduced. At this time, by opening the first switch valve 111 and closing the second switch valve 113, the high-temperature gas-liquid mixture generated by the electrolysis of the electrolytic cell 10 can be better allowed to enter the first channel 71 of the heat exchanger 70, and the first channel 71 is connected to the separation and purification component 30, so that the high-temperature gas-liquid mixture entering the first channel 71 can enter the separation and purification component 30 to be separated from the gas and liquid and purified to form a low-temperature gas. At this time, the low-temperature gas enters the second channel 73 and can exchange heat with the high-temperature gas-liquid mixture in the first channel 71, so as to obtain a high-purity high-temperature gas with the alkali solution separated. By using the high-temperature gas to act on the dryer 50, the adsorbent in the critical saturation state in the dryer 50 can be desorbed under the action of high temperature, so that the moisture in the adsorbent is separated and the adsorbent returns to the normal adsorption operation state, thereby ensuring the normal operation of the dryer 50. Among them, it can be understood that the pipeline where the first switch valve 111 and the second switch valve 113 are located can be a branch of multiple outlet pipelines of the electrolytic cell 10, so that the electrolytic cell 10 can output to multiple separation and purification components 30 and dryers 50, thereby ensuring uninterrupted operation of the electrolytic cell 10 and improving the practicality of the water electrolysis hydrogen production equipment 100.

[0068] Step S30 : the high-temperature gas in the second channel 73 enters the dryer 50 , so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer 50 .

[0069] It is understandable that after heat exchange in the heat exchanger 70, the gas input into the dryer 50 is a high-purity high-temperature gas. At this time, the high-temperature gas passing through the dryer 50 can cause the adsorbent in the dryer 50 to be desorbed and reduced by the high temperature of the gas, thereby achieving the effect of reducing and regenerating the dryer 50. When the high-temperature gas acts in the dryer 50, the temperature detection mechanism in the dryer 50 can be activated to monitor the reduction temperature in the dryer 50 in real time to avoid the excessive temperature from causing certain effects on the adsorbent.

[0070] In this embodiment, by utilizing timing control, the opening and closing of the first switch valve 111 and the second switch valve 113 are controlled when a certain first preset time is reached, and the high-temperature gas-liquid mixture output by the electrolytic cell 10 is used to perform heat exchange with the gas to be purified and to enter the dryer 50, so that the dryer 50 can utilize the waste heat of the electrolytic cell 10 for desorption and regeneration, and the controller is used to start the reduction program of the dryer 50 when it is in a critical saturation state, so that the automatic control of the water electrolysis hydrogen production equipment 100 can be better realized, and a better control effect can be achieved, the labor cost of the water electrolysis hydrogen production equipment 100 can be reduced, and the practicality of the water electrolysis hydrogen production equipment 100 can be further improved.

[0071] Further, refer to Figure 4 , Figure 4 The figure is a flow chart of cooling the dryer 50 after the dryer 50 completes desorption. In this embodiment, after the high-temperature gas in the second channel 73 enters the dryer 50 so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer 50, the figure also includes:

[0072] Step S40: After the electrolysis of the electrolytic cell 10 reaches a second preset time, the first switch valve 111 is closed and the second switch valve 113 is opened, and the gas-liquid mixture output by the electrolytic cell 10 enters the separation and purification component 30, so that the gas-liquid mixture is separated and purified to obtain a low-temperature gas;

[0073] It can be understood that the second preset time can be the time when the adsorbent in the dryer 50 completes desorption. At this time, by controlling the first switch valve 111 to close and opening the second switch valve 113, the heat exchange in the heat exchanger 70 can be stopped, so that the low-temperature gas purified by the separation and purification component 30 can directly enter the dryer 50 to cool the dryer 50 to a certain extent, so that the temperature in the dryer 50 returns to the normal operating temperature, so that the dryer 50 can operate better.

[0074] Step S50 : the low-temperature gas outputted from the separation and purification component 30 enters the dryer 50 , so that the low-temperature gas cools the dryer 50 .

[0075] It is understandable that after the low-temperature gas enters the dryer 50, the temperature detection unit in the dryer 50 can be started to detect the temperature of the dryer 50. When it is detected that the temperature of the dryer 50 returns to the normal operating temperature, a command can be issued to the controller to control the dryer 50 to return to the normal operation process of the water electrolysis hydrogen production equipment 100, and restart the timing of the first preset time to achieve the cyclic operation of the dryer 50.

[0076] Reference Figure 5 , Figure 5The flowchart for controlling the auxiliary heating of the heating device in the dryer 50 is as follows. In this embodiment, while executing the step of high-temperature gas in the second channel 73 entering the dryer 50 so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer 50, the following steps are also included:

[0077] Step S31: Control the heating device in the dryer 50 to start heating up;

[0078] It is understandable that the use of a heating device can further heat the dryer 50, so that the dryer 50 can quickly reach the desorption reduction temperature under the action of the high-temperature gas and the heating device, and achieve better desorption efficiency and desorption effect. Among them, the controller can obtain a signal for heat exchange in the heat exchanger 70, so that the controller can issue an instruction to the heating device at this moment to control the heating device to start, so that the high-temperature gas and the heating device can better heat the dryer 50 and achieve a faster heating effect. Secondly, the heating device can also be controlled by timing control, so that the electrolytic cell 10 works until the first preset time and then issues an instruction to start the timer in the dryer 50. After the fourth preset time has passed, the fourth preset time can be the time from the first preset time to the start of heat exchange in the heat exchanger 70, and an instruction is issued to control the start of the heating device to achieve self-control of the dryer 50, further improving the practicality of the electrolytic water hydrogen production equipment 100.

[0079] Step S32: every third preset time interval, start the temperature sensor in the dryer 50 to obtain the temperature of the dryer 50, and compare the detected temperature with the preset temperature;

[0080] It can be understood that when the heating device in the dryer 50 is started, the timer in the dryer 50 can be started at the same time, and the timer can perform timing operation, so that the timer can trigger the start of the temperature sensor every third preset time, so that the temperature sensor detects the temperature in the dryer 50 at this time, and transmits the temperature signal to the controller for comparison operation, thereby realizing real-time detection of the dryer 50.

[0081] Step S33: When the detected temperature is the same as the preset temperature, the heating device is stopped from continuing to heat up, and the heating device is controlled to maintain a constant temperature.

[0082] It is understandable that when the controller receives the temperature signal transmitted by the temperature sensor, it can compare the temperature signal with the temperature preset by the user in advance. The preset temperature can be the maximum temperature for the adsorbent to desorb and regenerate, so that the dryer 50 can desorb and regenerate at a better temperature, further improving practicality and reliability. The comparison result can be fed back to the controller. When the controller receives that the detected temperature is equal to the preset temperature, it can issue an instruction to control the heating device to stop heating and maintain a constant temperature. At this time, the timer in the dryer 50 can also stop operating at the same time, or run the dryer 50 to complete the timing of the desorption time, so that the dryer 50 can achieve desorption and regeneration at the optimal temperature to achieve a better desorption effect.

[0083] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water electrolysis hydrogen production device, characterized in that: The water electrolysis hydrogen production equipment comprises: Electrolytic cell; A separation and purification component, wherein the separation and purification component is used to perform gas-liquid separation and purification on a gas-liquid mixture; A dryer, the dryer is used to dry the gas, the dryer is provided with a heating device, the heating device is used to heat the dryer; and A heat exchanger, wherein the heat exchanger has a first channel and a second channel, wherein the outer wall of the first channel and the outer wall of the second channel are in contact with each other so that the gas-liquid mixture in the first channel and the gas in the second channel can exchange heat, wherein the two ends of the first channel are respectively connected to the outlet of the electrolytic cell and the inlet of the separation and purification component, and the two ends of the second channel are respectively connected to the outlet of the separation and purification component and the inlet of the dryer.

2. The water electrolysis hydrogen production equipment according to claim 1, characterized in that: The outlet of the electrolytic cell is in communication with the inlet of the separation and purification component.

3. The water electrolysis hydrogen production equipment according to claim 2, characterized in that: The electrolytic cell is provided with a first switch valve and a second switch valve, wherein the first switch valve is used to control the connection and closing of the electrolytic cell outlet with the first channel, and the second switch valve is used to control the connection and closing of the electrolytic cell outlet with the inlet of the separation and purification component.

4. The water electrolysis hydrogen production equipment according to claim 3, characterized in that: The outlet of the electrolytic cell is connected to a gas outlet main pipe, the gas outlet main pipe is connected to the first channel, the gas outlet main pipe is provided with a gas outlet branch pipe, and the gas outlet branch pipe is connected to the inlet of the separation and purification component; The first switch valve is arranged on the gas outlet main pipe and between the gas outlet branch pipe and the heat exchanger, and the second switch valve is arranged on the gas outlet branch pipe.

5. The water electrolysis hydrogen production equipment according to claim 3, characterized in that: The water electrolysis hydrogen production equipment also includes a control unit, which is electrically connected to the first switch valve and the second switch valve.

6. The water electrolysis hydrogen production equipment according to claim 5, characterized in that: A temperature sensor is provided in the dryer, the temperature sensor is electrically connected to the control unit, and the temperature sensor is used to detect the temperature in the dryer.

7. The water electrolysis hydrogen production equipment according to claim 5, characterized in that: The heating device is electrically connected to the control unit.

8. The water electrolysis hydrogen production equipment according to any one of claims 3 to 7, characterized in that: The separation and purification component comprises: a gas-liquid separation device, wherein an inlet of the gas-liquid separation device is connected to the first channel; and A purification device, wherein the inlet of the purification device is connected to the outlet of the gas-liquid separation device, the outlet of the purification device is connected to the second channel, and the purification device is used to remove impurities and purify the gas.

9. The water electrolysis hydrogen production equipment according to any one of claims 3 to 7, characterized in that: The heat exchanger comprises: A housing having a receiving cavity formed therein; a first heat exchange tube, which is installed in the accommodating cavity and penetrates the accommodating cavity from bottom to top, and forms the first channel; and A second heat exchange tube is installed in the accommodating cavity and is arranged to be wound around the first heat exchange tube, and the second heat exchange tube forms the second channel.

10. A method for controlling the regeneration of a dryer of a water electrolysis hydrogen production device, wherein the water electrolysis hydrogen production device is the water electrolysis hydrogen production device according to any one of claims 3 to 9, characterized in that: The dryer regeneration control method comprises the following steps: The electrolytic cell performs electrolysis until a first preset time; The first switch valve is opened and the second switch valve is closed. The gas-liquid mixture outputted from the electrolytic cell enters the first channel of the heat exchanger, enters the separation and purification component to obtain low-temperature gas, and enters the second channel of the heat exchanger, so that the low-temperature gas exchanges heat with the high-temperature mixture in the first channel to obtain high-temperature gas; The high-temperature gas in the second channel enters the dryer, so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer.

11. The dryer regeneration control method according to claim 10, characterized in that: After the step of high-temperature gas in the second channel entering the dryer so that the high-temperature gas desorbs and regenerates the adsorbent in the dryer, the method further comprises: After the electrolysis of the electrolytic cell reaches a second preset time, the first switch valve is closed and the second switch valve is opened, and the gas-liquid mixture output by the electrolytic cell enters the separation and purification component, so that the gas-liquid mixture is separated and purified to obtain low-temperature gas; The low-temperature gas output by the separation and purification component enters the dryer, so that the low-temperature gas cools the dryer.

12. The dryer regeneration control method according to claim 10, characterized in that: While executing the step of the high temperature gas in the second channel entering the dryer so that the high temperature gas desorbs and regenerates the adsorbent in the dryer, the method further includes: Control the heating device in the dryer to start heating up; At every third preset time interval, a temperature sensor in the dryer is activated to obtain the temperature of the dryer, and the detected temperature is compared with the preset temperature; When the detected temperature is the same as the preset temperature, the heating device is stopped from continuing to heat up, and the heating device is controlled to maintain a constant temperature.

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