Hydrogen production apparatus by electrolysis of water

Abstract

The utility model discloses an electrolytic water hydrogen production device. Electrolytic water hydrogen production device includes pure water storage tank, first conductivity meter, deionization pump, first deionization ware, water replenishing pump and oxygen side circulation processing subassembly, the tank export of pure water storage tank is connected with the water pump import of deionization pump, the water pump export of deionization pump is connected with the water deionization import of first deionization ware, and the water circulation import of pure water storage tank is connected with the water deionization export of first deionization ware, the water replenishing pump import of water replenishing pump is connected with the tank export, and the water replenishing pump export of water replenishing pump is connected with the water replenishing import of oxygen side circulation processing subassembly. Therefore, the pure water stored in pure water storage tank passes through the deionization circulating loop formed by pure water storage tank, deionization pump and first deionization ware to make the impurity ion content of pure water in pure water storage tank meet the requirement, avoid the impurity ion content of water supplemented into electrolytic cell not meeting the requirement, and then can reduce the operation burden of electrolytic cell, reduce power loss, improve the power utilization and electrolytic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production, and more specifically to a hydrogen production device for water electrolysis. Background Technology

[0002] Existing water electrolysis hydrogen production devices directly add pure water to the oxygen cycle loop.

[0003] In this way, the deionization of pure water is not sufficient. If the electrolysis hydrogen production device operates for a long period of time, the proton exchange membrane degrades slightly, or the inner wall of the pipeline or pure water storage tank is ionized, the impurity ion content of the liquid in the electrolyzer will be too high, which will increase the operating burden of the electrolyzer, increase power loss, and reduce electrolysis efficiency.

[0004] Therefore, this utility model provides an electrolytic water hydrogen production device to at least partially solve the above-mentioned problems. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further described in detail in the detailed embodiments section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above-mentioned technical problems, this utility model provides a water electrolysis hydrogen production device, which includes: Pure water storage tank; The first conductivity meter is connected to the internal space of the pure water storage tank; The deion pump has its inlet connected to the outlet of the pure water storage tank. The first deionizer has its water deionization inlet connected to the water pump outlet of the deionization pump, and its water deionization outlet connected to the water circulation inlet of the pure water storage tank. The water supply pump has its inlet connected to the tank outlet. The oxygen-side circulation treatment component has a water inlet connected to the water outlet of the water supply pump. The oxygen-side circulation treatment component includes an electrolyzer, an oxygen-water primary separator, and a circulation pump. The electrolyzer, the oxygen-water primary separator, and the circulation pump are connected in sequence to form an oxygen circulation loop.

[0007] According to the electrolytic water hydrogen production device of this utility model, the pure water stored in the pure water storage tank can form a deionization circulation loop through the pure water storage tank, the deionization pump and the first deionizer to ensure that the impurity ion content of the pure water in the pure water storage tank meets the requirements; the pure water stored in the pure water storage tank can be pumped to the oxygen-side circulation treatment component to replenish the electrolyzer with pure water, thus avoiding the impurity ion content of the water replenished to the electrolyzer not meeting the requirements, thereby reducing the operating burden of the electrolyzer, reducing power loss, and improving the energy utilization rate and electrolysis efficiency.

[0008] Optionally, the outlet of the makeup water pump is connected to the makeup water inlet of the primary oxygen-water separator, and / or The oxygen-side circulation treatment assembly also includes a circulation heat exchanger, through which the first oxygen liquid outlet of the oxygen-water primary separator is connected to the circulation pump inlet of the circulation pump.

[0009] Optionally, the oxygen circulation loop includes a main pipeline connecting the circulation pump outlet of the circulation pump and the oxygen inlet of the electrolyzer, the main pipeline being equipped with a first switching valve, and the oxygen-side circulation processing assembly further includes: The second deionizer has its oxygen deionization inlet connected to the outlet of the circulating pump and its oxygen deionization outlet connected to the oxygen inlet, forming an oxygen deionization branch in parallel with the main pipeline. The oxygen deionization branch is equipped with a second switching valve. The second conductivity meter is connected to the oxygen inlet.

[0010] Optionally, the water electrolysis hydrogen production device also includes a controller electrically connected to the first switching valve and the second switching valve. The controller is used to control the first switching valve to cut off the main pipeline and control the second switching valve to open the oxygen deionization branch when the fluctuation range of the electrolyzer conductivity detected by the second conductivity meter exceeds the second preset conductivity range.

[0011] Optionally, the outlet of the circulating pump is also connected to the internal space of the pure water storage tank to form a return branch. The water electrolysis hydrogen production device also includes a third conductivity meter, which is connected to the oxygen-water primary separator.

[0012] Optionally, the return branch is equipped with a flow valve. The water electrolysis hydrogen production device also includes a controller electrically connected to the flow valve. The controller is used to control the flow valve to open the return branch when the fluctuation range of the primary conductivity of the oxygen water detected by the third conductivity meter exceeds the third preset conductivity range.

[0013] Optionally, the water electrolysis hydrogen production unit also includes: The oxygen-water secondary separator has its first oxygen outlet connected to the second oxygen mixing inlet of the oxygen-water secondary separator, and its second oxygen liquid outlet connected to the first multi-stage mixing inlet of the oxygen-water primary separator. The oxygen heat exchanger connects the first oxygen outlet to the second oxygen mixing inlet.

[0014] Optionally, the water electrolysis hydrogen production unit also includes: The hydrogen-water primary separator has its first hydrogen mixing inlet connected to the hydrogen outlet of the electrolyzer. The hydrogen-water secondary separator has its second hydrogen mixing inlet connected to the first hydrogen outlet of the hydrogen-water primary separator. The hydrogen heat exchanger connects the second hydrogen mixing inlet to the first hydrogen outlet.

[0015] Optionally, the water electrolysis hydrogen production device also includes a hydrogen collector, wherein the first hydrogen liquid outlet of the primary hydrogen-water separator and the second hydrogen liquid outlet of the secondary hydrogen-water separator are both connected to the hydrogen collector.

[0016] Optionally, the water electrolysis hydrogen production device also includes a controller electrically connected to the deionization pump and the first conductivity meter. The controller is used to control the deionization pump to deliver pure water from the pure water storage tank to the first deionizer when the fluctuation range of the conductivity of pure water detected by the first conductivity meter exceeds a first preset conductivity range. Attached Figure Description

[0017] To make the advantages of this invention more readily apparent, the invention briefly described above will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. It should be understood that these drawings depict only typical embodiments of the invention and should not be construed as limiting its scope of protection. The invention is described and explained with additional features and details through the drawings.

[0018] Figure 1 This is a schematic diagram of a water electrolysis hydrogen production device according to a preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures 110: Pure water storage tank; 111: Tank inlet 112: Water circulation inlet; 113: Tank outlet 114: Return to entry 120: Deionization pump 121: Pump inlet; 122: Pump outlet 123: Makeup pump 124: Makeup pump inlet 125: Water supply pump outlet; 126: Circulation pump 127: Circulating pump inlet; 128: Circulating pump outlet 130: First deionizer; 131: Water deionization inlet. 132: Water deionization outlet; 133: Second deionizer 134: Oxygen deionization inlet; 135: Oxygen deionization outlet. 140: Electrolytic cell; 141: Oxygen inlet 142: Oxygen outlet 143: Hydrogen outlet 144: First conductivity meter 145: Second conductivity meter 146: Third conductivity meter 147: Oxygen-side circulation processing assembly 148: Hydrogen water collector; 150: Oxygen-water primary separator 151: First oxygen mixing inlet; 152: First oxygen liquid outlet 153: First oxygen outlet; 154: Water inlet 155: First multi-stage mixing inlet; 160: Secondary oxygen-water separator 161: Second oxygen mixing inlet; 162: Second oxygen liquid outlet 163: Second oxygen outlet; 170: Circulating heat exchanger 171: First oxygen inlet; 172: First oxygen outlet 173: Oxygen heat exchanger; 174: Second oxygen inlet 175: Second oxygen outlet; 176: Hydrogen heat exchanger 177: Hydrogen heat exchange inlet; 178: Hydrogen heat exchange outlet 180: Hydrogen-water primary separator; 181: First hydrogen mixing inlet. 182: First hydrogen gas outlet; 183: First liquid hydrogen outlet 190: Secondary hydrogen-water separator; 191: Second hydrogen mixing inlet 192: Second hydrogen outlet; 193: Second liquid hydrogen outlet 194: Main pipe 195: Flow valve 196: First switching valve; 197: Second switching valve 198: Return branch; 199: Oxygen deionization branch Detailed Implementation

[0020] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0021] The preferred embodiments of this utility model will now be described with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0022] In this document, ordinal numbers such as “first” and “second” used in this invention are merely identifiers and do not include any other meaning, such as a specific order.

[0023] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may also include other embodiments.

[0024] This invention provides a water electrolysis hydrogen production device. The device is used to produce hydrogen via a PEM (Proton Exchange Membrane). The device processes pure water through a deionization cycle to ensure its conductivity falls within a first preset conductivity range, meeting the conductivity requirements of the pure water added to the electrolysis cell 140. This qualified pure water is then added to the electrolysis cell 140, allowing hydrogen production as needed and improving electrolysis efficiency. Conductivity represents the ion content (impurity ions, such as Ca2+, Cl-, K+) in pure water. The first preset conductivity range is 0.1 μS / cm ≤ conductivity ≤ 1 μS / cm.

[0025] Please refer to Figure 1 The water electrolysis hydrogen production device includes a pure water storage tank 110. The pure water storage tank 110 can be used to store pure water. The pure water storage tank 110 includes a tank inlet 111, a water circulation inlet 112, and a tank outlet 113. The tank inlet 111 can be used to connect to a water purifier, allowing the water purifier to inject deionized pure water into the pure water storage tank 110 through the tank inlet 111.

[0026] The water electrolysis hydrogen production device also includes a first conductivity meter 144, a deionization pump 120, and a first deionizer 130. The first conductivity meter 144 can be a conductivity detector. The first conductivity meter 144 is connected to the internal space of the pure water storage tank 110 to detect the conductivity of the pure water stored in the pure water storage tank 110.

[0027] The deion pump 120 includes a pump inlet 121 and a pump outlet 122. The first deionizer 130 includes a water deionization inlet 131 and a water deionization outlet 132. The pump inlet 121 is connected to the tank outlet 113. The water deionization inlet 131 is connected to the pump outlet 122. The water deionization outlet 132 is connected to the water circulation inlet 112.

[0028] Thus, the pure water storage tank 110, the deion pump 120, and the first deionizer 130 constitute a deionization circulation loop. The conductivity of the pure water stored in the pure water storage tank 110 can be detected by the first conductivity meter 144. The controller described later is used to control the deion pump 120 to transport the pure water in the pure water storage tank 110 to the first deionizer 130 when the fluctuation range of the pure water conductivity exceeds the first preset conductivity range, so that the ion exchange resin of the first deionizer 130 removes ions from the pure water, thereby reducing the fluctuation range of the pure water conductivity until the fluctuation range of the pure water conductivity does not exceed the first preset conductivity range.

[0029] The controller described below is also used to cut off the pipeline connecting the water pump inlet 121 and the tank outlet 113 when the fluctuation range of the conductivity of pure water does not exceed the first preset conductivity range, and to stop the deion pump 120 from working.

[0030] The water electrolysis hydrogen production unit also includes a makeup water pump 123 and an oxygen-side circulation treatment assembly 147. The oxygen-side circulation treatment assembly 147 includes an electrolyzer 140, an oxygen-water primary separator 150, and a circulation pump 126. The electrolyzer 140 is used to produce hydrogen via PEM, thereby generating a hydrogen mixture and an oxygen mixture.

[0031] Electrolyzer 140, oxygen-water primary separator 150, and circulation pump 126 are sequentially connected to form an oxygen circulation loop (heat removal loop). Specifically, electrolyzer 140 includes an oxygen inlet 141 (anode titanium plate), an oxygen outlet 142, and a hydrogen outlet 143. Oxygen-water primary separator 150 can be a gas-liquid separator. Oxygen-water primary separator 150 includes a first oxygen mixing inlet 151, a first oxygen liquid outlet 152, and a first oxygen outlet 153. Circulation pump 126 includes a circulation pump inlet 127 and a circulation pump outlet 128.

[0032] Oxygen outlet 142 is connected to the first oxygen mixing inlet 151. The first oxygen liquid outlet 152 is connected to the circulation pump inlet 127. The circulation pump outlet 128 is connected to the oxygen inlet 141 to form an oxygen circulation loop. The oxygen mixture discharged from the battery tank through oxygen outlet 142 enters the oxygen-water primary separator 150. After the oxygen mixture undergoes primary oxygen-liquid separation in the oxygen-water primary separator 150, the separated liquid is discharged from the oxygen-water primary separator 150 through the first oxygen liquid outlet 152. The circulation pump 126 transports the liquid discharged from the oxygen-water primary separator 150 to the battery tank through oxygen inlet 141 to complete one cycle.

[0033] The makeup water pump 123 includes a makeup water pump inlet 124 and a makeup water pump outlet 125. The oxygen-side circulation treatment assembly 147 has a makeup water inlet 154. The makeup water inlet 154 is connected to the makeup water pump outlet 125. The makeup water pump inlet 124 is connected to the tank outlet 113. In this way, the makeup water pump 123 can deliver pure water from the pure water storage tank 110 to the oxygen-side circulation treatment assembly 147, thereby replenishing the oxygen-side circulation treatment assembly 147 with pure water.

[0034] It should be noted that "connection" in this article refers to connection via pipes. Each pipe is equipped with a switch valve to shut off or open the pipes.

[0035] In this embodiment, the pure water stored in the pure water storage tank 110 can form a deionization circulation loop via the pure water storage tank 110, the deionization pump 120, and the first deionizer 130, so that the impurity ion content of the pure water in the pure water storage tank 110 meets the requirements. The pure water stored in the pure water storage tank 110 can be pumped to the oxygen-side circulation treatment component 147 to replenish the electrolyzer 140 with pure water. This avoids the impurity ion content of the water replenished to the electrolyzer 140 not meeting the requirements, thereby reducing the operating burden of the electrolyzer, reducing power loss, and improving energy utilization and electrolysis efficiency.

[0036] Optionally, the oxygen-water primary separator 150 also includes a water inlet 154. The water outlet 125 is connected to the water inlet 154 of the oxygen-water primary separator 150. In this way, pure water enters the oxygen-water primary separator 150 to mix with the liquid inside the oxygen-water primary separator 150, thereby replenishing the water in the oxygen-side circulation treatment component 147 and reducing the temperature of the liquid discharged from the oxygen-water primary separator 150.

[0037] Optionally, the oxygen-side circulation processing assembly 147 further includes a circulation heat exchanger 170. The circulation heat exchanger 170 includes a first oxygen inlet 171 and a first oxygen outlet 172. The first oxygen inlet 171 is connected to a first oxygen liquid outlet 152. The first oxygen outlet 172 is connected to a circulation pump inlet 127. Thus, the first oxygen liquid outlet 152 is connected to the circulation pump inlet 127 of the circulation pump 126 via the circulation heat exchanger 170. Therefore, the circulation heat exchanger 170 can reduce the temperature of the liquid entering the circulation pump 126, thereby reducing the performance requirements of the circulation pump 126 and consequently lowering its price.

[0038] Optionally, the oxygen circulation loop includes a main pipeline (194) connecting the circulation pump outlet 128 and the oxygen inlet 141. The oxygen-side circulation processing assembly 147 also includes a second deionizer 133 and a second conductivity meter 145. The second deionizer 133 includes an oxygen deionization inlet 134 and an oxygen deionization outlet 135. The oxygen deionization inlet 134 is connected to the circulation pump outlet 128, and the oxygen deionization outlet 135 is connected to the oxygen inlet 141, forming an oxygen deionization branch 199 in parallel with the main pipeline. The second conductivity meter 145 can be a conductivity detector. The second conductivity meter 145 is connected to the oxygen inlet 141. The second conductivity meter 145 is used to detect the conductivity (electrolyte conductivity) of the liquid to be input into the electrolyzer 140.

[0039] like Figure 1 As shown, the water electrolysis hydrogen production device also includes a first switching valve 196 and a second switching valve 197. Both the first switching valve 196 and the second switching valve 197 can be pneumatic two-way ball valves. The first switching valve 196 is located on the main pipeline for use in shutting off or opening the main pipeline. The second switching valve 197 is located on the oxygen deionization branch 199 for use in shutting off or opening the oxygen deionization branch 199.

[0040] The controller described below is used to control the first switching valve 196 to cut off the main pipeline 194 connecting the circulation pump outlet 128 and the oxygen inlet 141 when the fluctuation range of the electrolyzer conductivity exceeds the second preset conductivity range (a slight increase in conductivity). Simultaneously, it controls the second switching valve 197 to open the oxygen deionization branch 199, thereby removing ions from the liquid input into the electrolyzer 140 through the ion exchange resin of the second deionizer 133, thus restoring the fluctuation range of the electrolyzer conductivity to the second preset conductivity range. The oxygen deionization branch 199 reduces the electrolyzer conductivity quickly. This is applicable when the electrolyzer conductivity fluctuates within a small range, for example, when the second preset conductivity range is 0.04 μS / cm ≤ conductivity ≤ 0.06 μS / cm.

[0041] When the conductivity of the electrolyzer does not exceed the second preset conductivity range, the oxygen deionization branch 199 is cut off by controlling the second switching valve 197, and the main pipeline 194 is opened by controlling the first switching valve 196, so as to deliver liquid to the electrolyzer 140 through the main pipeline 194.

[0042] Optionally, the pure water storage tank 110 also includes a return inlet 114. The circulation pump outlet 128 is also connected to the return inlet 114 to form a return branch 198. The water electrolysis hydrogen production unit also includes a third conductivity meter 146. The third conductivity meter 146 is connected to the oxygen-water primary separator 150. The third conductivity meter 146 can be a conductivity detector. The third conductivity meter 146 is used to detect the conductivity (oxygen-water primary conductivity) of the liquid to be discharged from the oxygen-water primary separator 150.

[0043] The water electrolysis hydrogen production unit also includes a flow valve 195. The flow valve 195 can be a flow distribution valve. The flow valve is located in the return branch 198 to control the flow rate in the return branch 198.

[0044] The controller described below is used to control the flow valve 195 to open the return branch 198 when the fluctuation range of the primary conductivity of the oxygen water exceeds the third preset conductivity range. This allows a portion of the liquid output by the circulation pump 126 to be transported back to the pure water storage tank 110 through the return branch 198, while the remaining portion of the liquid output by the circulation pump 126 is still transported to the electrolysis cell 140 through the main pipeline 194.

[0045] Wherein, any two of the first, second, and third preset conductivity ranges are different. The second preset conductivity range is within the third preset conductivity range. The second preset conductivity range is within the first preset conductivity range. The difference between the maximum and minimum values ​​of the second preset conductivity range is the second difference. The difference between the maximum and minimum values ​​of the first preset conductivity range is the first difference. The difference between the maximum and minimum values ​​of the third preset conductivity range is the third difference. The second difference is less than 1 / 10 of the first difference. The second difference is less than 1 / 10 of the third difference.

[0046] The water electrolysis hydrogen production device also includes a controller (not shown). The controller is electrically connected to a flow valve 195, a first switching valve 196, a second switching valve 197, a first conductivity meter 144, a deionization pump 120, a makeup water pump 123, a third conductivity meter 146, a circulation pump 126, and a second conductivity meter 145. The controller collects the conductivity of the liquid through the first conductivity meter 144, the third conductivity meter 146, and the second conductivity meter 145, and thereby controls the operation of the flow valve 195, the first switching valve 196, the second switching valve 197, the deionization pump 120, the makeup water pump 123, and the circulation pump 126 in real time based on the conductivity of the liquid.

[0047] Optionally, the water electrolysis hydrogen production unit further includes an oxygen-water secondary separator 160. The oxygen-water secondary separator 160 can be a gas-liquid separator. The oxygen-water secondary separator 160 includes a second oxygen mixing inlet 161, a second oxygen liquid outlet 162, and a second oxygen outlet 163. The first oxygen outlet 163 is connected to the second oxygen mixing inlet 161. The second oxygen liquid outlet 162 is connected to the first multi-stage mixing inlet 155.

[0048] The oxygen mixture undergoes primary oxygen-liquid separation in the primary oxygen-liquid separator 150. The separated gas mixture is then conveyed to the secondary oxygen-liquid separator 160 for secondary oxygen-liquid separation. The gas discharged from the secondary oxygen-liquid separator 160 after secondary separation can be conveyed to an oxygen container or released into the air. The liquid discharged from the secondary oxygen-liquid separator 160 can be input into the primary oxygen-liquid separator 150 via the first multi-stage mixing inlet 155 to mix with the oxygen mixture and undergo another primary oxygen-liquid separation. Thus, by undergoing two gas-liquid separations, the amount of harmful substances in the oxygen mixture can be minimized.

[0049] Optionally, the water electrolysis hydrogen production unit also includes an oxygen heat exchanger 173. The oxygen heat exchanger 173 includes a second oxygen inlet 174 and a second oxygen outlet 175. The second oxygen inlet 174 is connected to a first oxygen outlet 153. The second oxygen outlet 175 is connected to a second oxygen mixing inlet 161. Thus, the first oxygen outlet 153 is connected to the second oxygen mixing inlet 161 via the oxygen heat exchanger 173. Consequently, the gas mixture discharged from the first oxygen outlet 153 is cooled at the oxygen heat exchanger 173 and then conveyed to an oxygen-water secondary separator 160 to further separate oxygen through gas-liquid separation within the oxygen-water secondary separator 160.

[0050] Optionally, the water electrolysis hydrogen production device further includes a primary hydrogen-water separator 180 and a secondary hydrogen-water separator 190. Both the primary hydrogen-water separator 180 and the secondary hydrogen-water separator 190 can be gas-liquid separators. The primary hydrogen-water separator 180 includes a first hydrogen mixing inlet 181, a first hydrogen gas outlet 182, and a first hydrogen liquid outlet 183. The secondary hydrogen-water separator 190 includes a second hydrogen mixing inlet 191, a second hydrogen gas outlet 192, and a second hydrogen liquid outlet 193.

[0051] The first hydrogen mixing inlet 181 is connected to the hydrogen outlet 143. The second hydrogen mixing inlet 191 is connected to the first hydrogen outlet 182. The hydrogen mixture discharged from the electrolyzer 140 through the hydrogen outlet 143 enters the hydrogen-water primary separator 180 for primary hydrogen-liquid separation. Primary gas-liquid separation occurs within the primary hydrogen-water separator 180. The gas mixture separated after the primary gas-liquid separation is transported via the first hydrogen outlet 182 to the hydrogen-water secondary separator 190 for secondary gas-liquid separation. The hydrogen discharged after the secondary gas-liquid separation can be transported to hydrogen storage equipment or hydrogen-using equipment. Thus, the hydrogen mixture discharged from the electrolyzer 140 undergoes two gas-liquid separations, improving the purity of the hydrogen.

[0052] Optionally, the water electrolysis hydrogen production apparatus further includes a hydrogen heat exchanger 176. The hydrogen heat exchanger 176 includes a hydrogen heat exchange inlet 177 and a hydrogen heat exchange outlet 178. The hydrogen heat exchange inlet 177 is connected to a first hydrogen outlet 182. The hydrogen heat exchange outlet 178 is connected to a second hydrogen mixing inlet 191. Thus, the second hydrogen mixing inlet 191 is connected to the first hydrogen outlet 182 via the hydrogen heat exchanger 176. Consequently, the gas mixture exiting from the first hydrogen outlet 182 is cooled at the hydrogen heat exchanger 176 and then conveyed to a hydrogen-water secondary separator 190 to further separate hydrogen through gas-liquid separation within the hydrogen-water secondary separator 190.

[0053] Optionally, the water electrolysis hydrogen production device also includes a hydrogen collector 148. The first hydrogen outlet 183 and the second hydrogen outlet 193 are both connected to the hydrogen collector 148. Thus, water discharged from the primary hydrogen-water separator 180 and the secondary hydrogen-water separator 190 can be collected through the hydrogen collector 148, avoiding environmental pollution.

[0054] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0055] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

Claims

1. A device for producing hydrogen through water electrolysis, characterized in that, The water electrolysis hydrogen production device includes: Pure water storage tank; A first conductivity meter is connected to the internal space of the pure water storage tank; A deionization pump, wherein the pump inlet of the deionization pump is connected to the outlet of the pure water storage tank; The first deionizer has a water deionization inlet connected to the water pump outlet of the deionization pump, and the water deionization outlet of the first deionizer is connected to the water circulation inlet of the pure water storage tank. A water supply pump, wherein the inlet of the water supply pump is connected to the outlet of the tank; An oxygen-side circulation treatment component is provided, wherein the water inlet of the oxygen-side circulation treatment component is connected to the water outlet of the water supply pump, and the oxygen-side circulation treatment component includes an electrolytic cell, an oxygen-water primary separator, and a circulation pump, wherein the electrolytic cell, the oxygen-water primary separator, and the circulation pump are sequentially connected to form an oxygen circulation loop.

2. The water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The outlet of the makeup water pump is connected to the makeup water inlet of the primary oxygen-water separator, and / or The oxygen-side circulation processing assembly also includes a circulation heat exchanger, and the first oxygen liquid outlet of the oxygen-water primary separator is connected to the circulation pump inlet of the circulation pump through the circulation heat exchanger.

3. The water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The oxygen circulation loop includes a main pipeline connecting the circulation pump outlet of the circulation pump and the oxygen inlet of the electrolyzer, the main pipeline being equipped with a first switching valve, and the oxygen-side circulation processing assembly further includes: The second deionizer has an oxygen deionization inlet connected to the outlet of the circulating pump and an oxygen deionization outlet connected to the oxygen inlet, forming an oxygen deionization branch in parallel with the main pipeline. The oxygen deionization branch is equipped with a second switching valve. A second conductivity meter is connected to the oxygen inlet.

4. The water electrolysis hydrogen production apparatus according to claim 3, characterized in that, The water electrolysis hydrogen production device further includes a controller electrically connected to the first switching valve and the second switching valve. The controller is used to control the first switching valve to cut off the main pipeline and control the second switching valve to open the oxygen deionization branch when the fluctuation range of the electrolyzer conductivity detected by the second conductivity meter exceeds the second preset conductivity range.

5. The water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The outlet of the circulating pump is also connected to the internal space of the pure water storage tank to form a return branch. The water electrolysis hydrogen production device also includes a third conductivity meter, which is connected to the oxygen-water primary separator.

6. The water electrolysis hydrogen production apparatus according to claim 5, characterized in that, The return branch is equipped with a flow valve. The water electrolysis hydrogen production device also includes a controller electrically connected to the flow valve. The controller is used to control the flow valve to open the return branch when the fluctuation range of the primary conductivity of the oxygen water detected by the third conductivity meter exceeds the third preset conductivity range.

7. The water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The water electrolysis hydrogen production device also includes: An oxygen-water secondary separator, wherein the first oxygen outlet of the oxygen-water primary separator is connected to the second oxygen mixing inlet of the oxygen-water secondary separator, and the second oxygen liquid outlet of the oxygen-water secondary separator is connected to the first multi-stage mixing inlet of the oxygen-water primary separator; An oxygen heat exchanger, wherein the first oxygen outlet is connected to the second oxygen mixing inlet via the oxygen heat exchanger.

8. The water electrolysis hydrogen production apparatus according to any one of claims 1 to 7, characterized in that, The water electrolysis hydrogen production device also includes: A hydrogen-water primary separator, wherein the first hydrogen mixing inlet of the hydrogen-water primary separator is connected to the hydrogen outlet of the electrolyzer; A hydrogen-water secondary separator, wherein the second hydrogen mixing inlet of the hydrogen-water secondary separator is connected to the first hydrogen outlet of the hydrogen-water primary separator; A hydrogen heat exchanger, wherein the second hydrogen mixing inlet is connected to the first hydrogen outlet through the hydrogen heat exchanger.

9. The water electrolysis hydrogen production apparatus according to claim 8, characterized in that, The water electrolysis hydrogen production device also includes a hydrogen collector, and the first hydrogen liquid outlet of the primary hydrogen-water separator and the second hydrogen liquid outlet of the secondary hydrogen-water separator are both connected to the hydrogen collector.

10. The water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The water electrolysis hydrogen production device also includes a controller electrically connected to the deion pump and the first conductivity meter. The controller is used to control the deion pump to deliver pure water from the pure water storage tank to the first deionizer when the fluctuation range of the conductivity of pure water detected by the first conductivity meter exceeds a first preset conductivity range.

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