An electrolytic water hydrogen production energy consumption monitoring device

Abstract

The utility model relates to electrolytic water hydrogen production technical field especially for a kind of electrolytic water hydrogen production energy consumption monitoring equipment, including electrolytic cell: monitoring mechanism is arranged on the electrolytic cell and is used for, monitoring mechanism includes: separation cooling component, including the gas-liquid separator of setting in electrolytic cell rear, and the inlet of gas-liquid separator is connected with the hydrogen gas output end of electrolytic cell, the right side of gas-liquid separator is provided with plate heat exchanger, the inlet of plate heat exchanger is connected with upper valve pipe, and coalescence filter is provided in plate heat exchanger front;Drying detection component, including the adsorption dryer of setting in plate heat exchanger right side, the outlet of adsorption dryer is connected with conveying pipe, the right end of conveying pipe is connected with tee pipe, and the right end of tee pipe is installed with hydrogen gas flowmeter;Through multistage collaborative processing technology, completely solve the problem of wet hydrogen measurement misalignment, ensure that flowmeter obtains accurate data under dry clean working condition, provide reliable basis for calculating unit hydrogen production energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology through water electrolysis, specifically to an energy consumption monitoring device for hydrogen production through water electrolysis. Background Technology

[0002] With the accelerated global green energy transition, hydrogen energy is becoming increasingly important as a clean energy carrier. Electrolysis of water to produce hydrogen has become the core path for green hydrogen production due to its zero carbon emission characteristics. This technology uses renewable energy to drive the electrolysis of water to produce high-purity hydrogen. Continuous investment in green hydrogen industry infrastructure is driving the development of electrolyzer systems towards large-scale and high-efficiency. Against this backdrop, accurate monitoring of energy consumption indicators in the hydrogen production process has become a key foundation for optimizing system operation, evaluating economics, and promoting technological iteration. According to CN120505669A, a one-to-many alkaline water electrolysis hydrogen production monitoring system and method are disclosed. This technology discloses a technical solution including "several alkaline circulation pumps, each of which is connected to an alkaline electrolyzer via pipeline. The cathode of each alkaline electrolyzer is connected to a hydrogen-oxygen analysis component, and the anode of each alkaline electrolyzer is connected to an oxygen-hydrogen analysis component. Each alkaline electrolyzer and the oxygen-hydrogen analysis component are connected via pipeline to a monitoring component, and each monitoring component is connected to the oxygen-hydrogen analysis component. Each alkaline circulation pump is connected to an alkaline cooler, and the alkaline cooler is connected to both the hydrogen-oxygen analysis component and the oxygen-hydrogen analysis component. Each monitoring component is connected to a controller." This technology has the technical effect of "solving the problem of not being able to monitor the oxygen-hydrogen content of each electrolyzer." The above scheme does not include an effective gas drying and purification device. The flow meter directly measures untreated wet hydrogen gas, which contains liquid moisture, alkaline droplets, and gaseous water molecules. This severely affects the measurement accuracy, resulting in inaccurate hydrogen production data and thus failing to provide a reliable basis for energy consumption calculation. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an energy consumption monitoring device for hydrogen production via water electrolysis. Through a multi-stage collaborative processing technology, it completely solves the problem of inaccurate measurement of wet hydrogen, ensuring that the flow meter obtains accurate data under dry and clean conditions, and providing a reliable basis for calculating the unit hydrogen production energy consumption.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an energy consumption monitoring device for hydrogen production via water electrolysis, comprising an electrolyzer; wherein the electrolyzer is equipped with a monitoring mechanism for use in monitoring, the monitoring mechanism comprising: The separation cooling assembly includes a gas-liquid separator located behind the electrolyzer, with the inlet of the gas-liquid separator connected to the hydrogen output end of the electrolyzer. A plate heat exchanger is located on the right side of the gas-liquid separator, with an upper valve pipe connected to the inlet of the plate heat exchanger, and a coalescing filter is located in front of the plate heat exchanger. The drying detection assembly includes an adsorption dryer located on the right side of the plate heat exchanger. The outlet of the adsorption dryer is connected to a delivery pipe, and the right end of the delivery pipe is connected to a tee pipe. A hydrogen flow meter is installed on the right end of the tee pipe.

[0005] Preferably, the drying detection assembly further includes a bypass pipe connected to the front end of the tee pipe, and a valve is installed on the bypass pipe.

[0006] Preferably, the separation cooling assembly further includes a condensate collector disposed in front of the plate heat exchanger, and a lower valve pipe is connected between the inlet of the condensate collector and the outlet of the plate heat exchanger.

[0007] Preferably, the separation and cooling assembly further includes a sampler connected between the gas-liquid separator outlet and the upper valve pipe, with a sampling bottle threaded onto the lower end of the sampler.

[0008] Preferably, the separation cooling assembly further includes a left valve pipe connected between the coalescing filter inlet and the condensate trap outlet, and a right valve pipe connected between the coalescing filter outlet and the adsorption dryer inlet.

[0009] Preferably, control valves and pressure monitoring instruments are provided on the upper valve pipe, lower valve pipe, left valve pipe and right valve pipe.

[0010] Beneficial effects This invention provides an energy consumption monitoring device for hydrogen production via water electrolysis. Compared with existing technologies, it has the following advantages: 1. Employing a three-stage processing flow of mechanical separation, cold condensation, and adsorption drying, the hydrogen gas can be thoroughly cleaned of liquid moisture, mist droplets, and gaseous water molecules, ultimately yielding ultra-dry hydrogen with an extremely low dew point. This process ensures that the hydrogen flow meter operates under dry and clean conditions, thereby obtaining extremely accurate hydrogen production measurement data.

[0011] 2. The bypass pipe can serve as a temporary instrument interface. When external testing is required, the valve opening can be adjusted to divert some hydrogen gas to the bypass pipe, providing a stable gas source for external instruments. Rapid sampling is achieved through the sampling bottle installed by the thread at the lower end of the sampler. Utilizing the pressure difference between the gas pressure inside the process pipeline and the external environment, the gas flows out of the sampler cavity into the sampling bottle by opening the sampling valve, thereby obtaining a representative uncooled raw gas sample. This allows operators to periodically obtain uncooled raw gas samples for direct analysis of the gas-liquid separator's separation efficiency, detection of alkali carryover in the gas, or monitoring of the electrolyzer's operating status. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the separate cooling component in this utility model; Figure 3 This is a schematic diagram of the coalescing filter in this utility model; Figure 4 This is a schematic diagram of the drying detection component in this utility model.

[0013] In the diagram: 1. Electrolytic cell; 2. Monitoring mechanism; 21. Separation and cooling assembly; 211. Gas-liquid separator; 212. Upper valve pipe; 213. Plate heat exchanger; 214. Lower valve pipe; 215. Condensate collector; 216. Sampler; 217. Coalescing filter; 218. Left valve pipe; 219. Right valve pipe; 2110. Sampling bottle; 22. Drying and detection assembly; 221. Adsorption dryer; 222. Delivery pipe; 223. T-connector; 224. Hydrogen flow meter; 225. Bypass pipe; 226. Valve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 - Figure 4 This utility model provides a technical solution: an energy consumption monitoring device for hydrogen production via water electrolysis, including an electrolyzer 1, a monitoring mechanism 2 installed on the electrolyzer 1, and the monitoring mechanism 2 includes: The separation cooling assembly 21 includes a gas-liquid separator 211 located behind the electrolytic cell 1, with the inlet of the gas-liquid separator 211 connected to the hydrogen output end of the electrolytic cell 1. A plate heat exchanger 213 is located on the right side of the gas-liquid separator 211, with an upper valve pipe 212 connected to the inlet of the plate heat exchanger 213. A coalescing filter 217 is located in front of the plate heat exchanger 213. The drying detection assembly 22 includes an adsorption dryer 221 located on the right side of the plate heat exchanger 213. The outlet of the adsorption dryer 221 is connected to a delivery pipe 222. The right end of the delivery pipe 222 is connected to a three-way pipe 223. A hydrogen flow meter 224 is installed on the right end of the three-way pipe 223.

[0016] In this embodiment, the high-temperature humid hydrogen gas generated by the electrolyzer 1 first enters the gas-liquid separator 211, where primary gas-liquid separation is achieved through centrifugation and baffle action, effectively removing most of the carried liquid water and alkaline solution. The separated gas then enters the plate heat exchanger 213 via the upper valve pipe 212, where the gas phase water is condensed into tiny droplets by the heat exchange medium, creating the necessary conditions for subsequent fine separation. The cooled gas-liquid mixture is then transported to the condensate collector 215 via the lower valve pipe 214, where its built-in coalescing filter 217 efficiently captures micron-sized droplets through fiber collision and coalescence, thoroughly removing the liquid. To eliminate the interference of mist moisture on the measurement, the dried gas enters the adsorption dryer 221 through the right valve pipe 219, where the molecular sieve further deeply adsorbs residual water molecules, ultimately obtaining ultra-dry hydrogen with an extremely low dew point. The dried hydrogen is distributed through the delivery pipe 222 and the three-way pipe 223, with one path entering the hydrogen flow meter 224 for accurate measurement. Through multi-stage coordinated processing of "mechanical separation-cold condensation-adsorption drying", the problem of inaccurate measurement of wet hydrogen is completely solved, ensuring that the hydrogen flow meter 224 obtains accurate data under dry and clean conditions, thereby providing a reliable basis for calculating the unit hydrogen production energy consumption.

[0017] Specifically, the drying detection assembly 22 also includes a bypass pipe 225 connected to the front end of the tee pipe 223, and a valve 226 is installed on the bypass pipe 225.

[0018] In this embodiment, the bypass pipe 225 can be used as a temporary instrument interface. When external detection is required, the opening of the valve 226 can be adjusted to divert some hydrogen to the bypass pipe 225, providing a stable gas source for external instruments.

[0019] Specifically, the separate cooling assembly 21 also includes a condensate trap 215 disposed in front of the plate heat exchanger 213, and a lower valve pipe 214 is connected between the inlet of the condensate trap 215 and the outlet of the plate heat exchanger 213.

[0020] In this embodiment, the low-temperature gas-liquid mixture formed after being cooled by the plate heat exchanger 213 enters the condensate trap 215 chamber tangentially through the lower valve pipe 214. The gas and liquid phases are efficiently separated by the combined action of centrifugal sedimentation and gravity separation. The liquid condensate rotates and settles along the tank wall and collects in the bottom storage tank, while the gas with the droplets removed is output from the top outlet.

[0021] Specifically, the separation cooling assembly 21 also includes a sampler 216 connected between the outlet of the gas-liquid separator 211 and the upper valve pipe 212, and a sampling bottle 2110 is threadedly installed at the lower end of the sampler 216.

[0022] In this embodiment, a rapid sampling function is achieved through a sampling bottle 2110 threaded at the lower end of the sampler 216. Utilizing the pressure difference between the gas pressure inside the process pipeline and the external environment, the gas flows out through the cavity of the sampler 216 into the sampling bottle 2110 by opening the sampling valve, thereby obtaining a representative uncooled raw gas sample. This allows operators to periodically obtain uncooled raw gas samples for direct analysis of the separation efficiency of the gas-liquid separator 211, detection of the amount of alkali carried in the gas, or monitoring of the operating status of the electrolyzer 1.

[0023] Specifically, the separation cooling assembly 21 also includes a left valve pipe 218 connected between the inlet of the coalescing filter 217 and the outlet of the condensate trap 215, and a right valve pipe 219 connected between the outlet of the coalescing filter 217 and the inlet of the adsorption dryer 221.

[0024] In this embodiment, when the coalescing filter 217 needs maintenance or filter element replacement, the shut-off valves on the left valve pipe 218 and the right valve pipe 219 can be closed to completely isolate the coalescing filter 217 from the system.

[0025] Specifically, control valves and pressure monitoring instruments are installed on the upper valve pipe 212, lower valve pipe 214, left valve pipe 218 and right valve pipe 219.

[0026] In this embodiment, precise throttling and cut-off control of the airflow channel is achieved through control valves in each pipe section. At the same time, pressure monitoring instruments collect pressure data in real time from key nodes such as the outlet of gas-liquid separator 211, the inlet and outlet of plate heat exchanger 213, the inlet and outlet of coalescing filter 217, and the inlet of adsorption dryer 221 to ensure that electrolytic cell 1 maintains the optimal working back pressure. Meanwhile, the pressure difference changes are used to determine whether the plate heat exchanger 213 is blocked, whether the filter element of coalescing filter 217 is saturated, and whether there are leaks in each pipeline.

[0027] The working principle and usage process of this utility model are as follows: First, the high-temperature humid hydrogen gas generated by the electrolytic cell 1 enters the gas-liquid separator 211, where primary gas-liquid separation is achieved through centrifugation and baffle action, effectively removing most of the carried liquid water and alkali solution; the separated gas enters the plate heat exchanger 213 through the upper valve pipe 212, where the gas phase water is condensed into tiny droplets by the heat exchange medium, creating the necessary conditions for subsequent fine separation; the cooled gas-liquid mixture is transported to the condensate trap 215 through the lower valve pipe 214, where the built-in coalescing filter 217 efficiently captures micron-sized droplets through fiber collision and coalescence, completely eliminating the interference of mist moisture on the measurement; the dried gas enters the adsorption dryer 221 through the right valve pipe 219, where the molecular sieve further deeply adsorbs residual water molecules, ultimately obtaining ultra-dry hydrogen gas with an extremely low dew point; the dried hydrogen gas is distributed through the delivery pipe 222 and the three-way pipe 223, with one path entering the hydrogen flow meter 224 for accurate measurement. Furthermore, the bypass pipe 225 can serve as a temporary instrument interface. When external testing is required, the opening of the valve 226 can be adjusted to divert some hydrogen gas to the bypass pipe 225, providing a stable gas source for external instruments.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy consumption monitoring device for hydrogen production via water electrolysis, comprising an electrolyzer (1), characterized in that: The electrolytic cell (1) is equipped with a monitoring mechanism (2) for use in electrolysis. The monitoring mechanism (2) includes: The separation cooling assembly (21) includes a gas-liquid separator (211) located behind the electrolytic cell (1), and the inlet of the gas-liquid separator (211) is connected to the hydrogen output end of the electrolytic cell (1). A plate heat exchanger (213) is located on the right side of the gas-liquid separator (211), and an upper valve pipe (212) is connected to the inlet of the plate heat exchanger (213). A coalescing filter (217) is located in front of the plate heat exchanger (213). The drying detection assembly (22) includes an adsorption dryer (221) located on the right side of the plate heat exchanger (213). The outlet of the adsorption dryer (221) is connected to a delivery pipe (222), and the right end of the delivery pipe (222) is connected to a three-way pipe (223). A hydrogen flow meter (224) is installed on the right end of the three-way pipe (223).

2. The energy consumption monitoring device for hydrogen production via water electrolysis according to claim 1, characterized in that: The drying detection assembly (22) also includes a bypass pipe (225) connected to the front end of the three-way pipe (223), and a valve (226) is installed on the bypass pipe (225).

3. The energy consumption monitoring device for hydrogen production via water electrolysis according to claim 1, characterized in that: The separate cooling assembly (21) also includes a condensate trap (215) disposed in front of the plate heat exchanger (213), and a lower valve pipe (214) is connected between the inlet of the condensate trap (215) and the outlet of the plate heat exchanger (213).

4. The energy consumption monitoring device for hydrogen production via water electrolysis according to claim 1, characterized in that: The separation cooling assembly (21) also includes a sampler (216) connected between the outlet of the gas-liquid separator (211) and the upper valve pipe (212), and a sampling bottle (2110) is threaded onto the lower end of the sampler (216).

5. The energy consumption monitoring device for hydrogen production via water electrolysis according to claim 3, characterized in that: The separation cooling assembly (21) also includes a left valve pipe (218) connected between the inlet of the coalescing filter (217) and the outlet of the condensate trap (215), and a right valve pipe (219) connected between the outlet of the coalescing filter (217) and the inlet of the adsorption dryer (221).

6. The energy consumption monitoring device for hydrogen production via water electrolysis according to claim 5, characterized in that: Control valves and pressure monitoring instruments are installed on the upper valve pipe (212), lower valve pipe (214), left valve pipe (218) and right valve pipe (219).

Images