Hydrogen flow control device

Abstract

The utility model relates to the technical field of pure water electrolysis hydrogen production, in particular to a hydrogen flow control device, which is technically characterized by comprising two screwed joints, the two screwed joints are respectively used for being connected with a gas outlet of a drying tower, one end, deviating from the drying tower, of each screwed joint is connected with a hydrogen filter, and the other end, deviating from the drying tower, of each screwed joint is connected with a valve. First connecting joints are arranged at the ends, deviating from the threaded joints, of the hydrogen filters, the ends, deviating from the hydrogen filters, of the first connecting joints communicate with one another through second connecting joints, one end of each second connecting joint serves as a hydrogen output port, and all the parts communicate with one another through pipelines. The hydrogen flow control device adopts a standardized design, and is suitable for various PEM water electrolysis hydrogen production systems which are small in gas production rate and use a two-tower process. And moreover, the types and specifications of the used components and pipelines are fixed, and meanwhile, the device can be separated from an equipment production line and can be independently prefabricated and assembled in batches.

Description

Technical Field

[0001] The utility model relates to the technical field of PEM pure water electrolysis hydrogen production, and particularly relates to a hydrogen flow control device. Background Technique

[0002] As an important part of the electrolytic water hydrogen production system, the performance of the PWM (pulse width modulation) hydrogen production power supply directly affects the efficiency and stability of the entire hydrogen production process. With its advantages such as high switching frequency, fast dynamic response, and low harmonic pollution, the PWM hydrogen production power supply shows good application prospects in the field of PEM pure water electrolysis hydrogen production. However, the high cost is still one of the main factors restricting its large-scale application. In the future, with the continuous maturity of technology and the further reduction of cost, PWM pure water electrolysis hydrogen production is expected to play a more important role in the hydrogen energy industry.

[0003] In the field of PEM (proton exchange membrane) pure water electrolysis hydrogen production, the two-tower process is widely used in hydrogen production equipment with relatively small gas production due to its high efficiency and stability. This process ensures high purity and stable output of hydrogen by finely regulating the gas separation and purification steps in the electrolysis process. At present, with the rapid development of the hydrogen energy industry and the continuous progress of technology, the PEM pure water electrolysis hydrogen production technology is gradually moving towards broader application scenarios.

[0004] The existing supporting flow control devices are all non-standard customized structures, and are installed and piped according to the actual situation on the equipment site. It is very difficult to perform prefabrication, separate assembly, airtightness testing, etc. independently from the equipment itself. Summary of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model lies in.

[0006] The above technical purpose of the utility model is achieved by the following technical solutions:

[0007] A hydrogen flow control device includes two threaded joints, which are respectively used to connect with the air outlet of the drying tower. One end of each of the two threaded joints away from the drying tower is respectively connected with a hydrogen filter. One end of the hydrogen filter away from the threaded joint is respectively provided with a first connection joint. One end of the first connection joint away from the hydrogen filter is communicated through a second connection joint. One end of the second connection joint points upward and serves as a hydrogen output port. Each component is communicated through a pipeline.

[0008] Preferably, the two first connection joints are respectively four-way joints. The ports of the two first connection joints adjacent to the connection ports of the hydrogen filters are communicated through a three-way joint. The other end of the three-way joint is communicated with one end port of the second connection joint.

[0009] Preferably, a first one-way valve is respectively arranged between the two first connection joints and the second connection joint.

[0010] Preferably, one end of each of the two first connection joints extends outward, and pressure sensors are respectively connected to the extended ends of the two first connection joints.

[0011] Preferably, a metering valve is arranged between the tee joint and the second connection joint.

[0012] Preferably, reducing joints are respectively arranged between the tee joint, the second connection joint and the metering valve.

[0013] Preferably, the pipeline is a tube pipe, and the tube pipe includes a straight pipe and a bent pipe.

[0014] Preferably, the straight pipes and the bent pipes used are of the same specification length.

[0015] The above-mentioned hydrogen flow control device adopts a standardized design and is widely applicable to various PEM electrolytic water hydrogen production systems with small gas production and using a two-tower process. Moreover, the types and specifications of the components and pipelines used are fixed. At the same time, the device can be separated from the equipment production line and prefabricated and assembled individually in batches, simplifying the product assembly process, reducing the technical level requirements for assembly workers, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a hydrogen flow control device in an embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall structure of a hydrogen flow control device from another angle in an embodiment of the present invention.

[0018] In the figure, 1, threaded joint; 2, hydrogen filter; 3, first connection joint; 4, second connection joint; 5, first one-way valve; 6, pressure sensor; 7, tee joint; 8, second one-way valve; 9, metering valve; 10, reducing joint DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] Please refer to Figure 1 and Figure 2, A hydrogen flow control device, including two threaded joints 1, the two threaded joints 1 are respectively used to connect with the air outlet of the drying tower, and one hydrogen filter 2 is respectively connected to one end of the two threaded joints 1 away from the drying tower. The hydrogen filter 2 is used to filter the dust particles carried in the hydrogen input from the air outlet of the drying tower.

[0021] In an embodiment, first connection joints 3 are respectively arranged at one end of the hydrogen filter 2 away from the threaded joint 1. The two first connection joints 3 are both four-way joints. One end of the first connection joint 3 away from the hydrogen filter 2 is connected and arranged through a second connection joint 4. The second connection joint 4 is the same as the first connection joint 3, both are four-way joints, and one end of the second connection joint 4 points upward and serves as a hydrogen output port. In an embodiment, in order to facilitate the flow control of hydrogen in the first connection joint 3, first one-way valves 5 are respectively arranged between the two first connection joints 3 and the second connection joint 4.

[0022] One end of the two first connection joints 3 extends outward, and pressure sensors 6 are respectively connected to the extended ends of the two first connection joints 3 to measure the hydrogen pressure in the first connection joint 3 through the pressure sensors 6.

[0023] The remaining ends of the two first connection joints 3 are connected and arranged through a three-way joint 7. Two ends of the three-way joint 7 are respectively connected to one port of the two first connection joints 3, and the other end is connected and arranged to the remaining end of the second connection joint 4. In an embodiment, in order to control the flow direction of hydrogen between the first connection joint 3 and the three-way joint 7, second one-way valves 8 are respectively arranged between the two first connection joints 3 and the three-way joint 7.

[0024] In an embodiment, a metering valve 9 is arranged between the three-way joint 7 and the second connection joint 4. In order to ensure the stable connection between the three-way joint 7 and the second connection joint 4 and the metering valve 9, reducing joints 10 are respectively arranged between the three-way joint 7 and the second connection joint 4 and the metering valve 9.

[0025] In order to realize the connection between components, in an embodiment, tube pipes are used to connect between components. The tube pipes include straight pipes and bent pipes. In an embodiment, the straight pipes and bent pipes used are of the same specification length, avoiding the possibility of incorrect or reverse installation of pipelines.

[0026] Working principle:

[0027] Under the operating state, the high-purity hydrogen purified by the drying tower enters the hydrogen flow control device. The hydrogen is divided into two parts under the working action of the first one-way valve 5, the second one-way valve 8 and the metering valve 9. Most of the hydrogen will be used as qualified finished gas and output to the gas-using end from the second connection joint 4 above; a small part of the hydrogen after throttling by the metering valve 9 enters another drying tower to purge the water vapor therein to the evacuation pipeline to realize the regeneration of the drying tower.

[0028] The hydrogen flow control device provided in this application is set as a joint with three layers of left, middle and right. The three layers are connected together by using a three-way joint 7 and the second connection joint 4 (four-way). The left and right layers are symmetric structures, and the left and right layers are composed of a threaded joint 1, a hydrogen filter 2, a first connection joint 3 (four-way), a pressure sensor 6, and a first one-way valve 5; the middle layer is composed of a reducing joint 10, a metering valve 9, a three-way joint 7 and a second connection joint 4. During assembly, the three layers are first assembled separately, and then the three layers are connected by using the three-way joint 7 and the second connection joint 4 in the middle layer; the hydrogen flow control device adopts a compression fitting connection method, and any component can be disassembled and replaced separately.

[0029] The hydrogen flow control device provided in this application adopts a standardized design and is widely applicable to various PEM electrolytic water hydrogen production systems with small gas production and using a two-tower process. Moreover, the types and specifications of the components and pipelines used are fixed. At the same time, the device can be separated from the equipment production line and prefabricated and assembled separately in batches, simplifying the product assembly process, reducing the technical level requirements for assembly workers, and improving production efficiency.

Claims

1. A hydrogen flow control device, characterized in that: It comprises two threaded joints, which are respectively used to be connected to the air outlet of the drying tower, and one end of the two threaded joints facing away from the drying tower is respectively connected to a hydrogen filter, and one end of the hydrogen filter facing away from the threaded joint is respectively provided with a first connecting joint, and the first connecting joint is connected to the end facing away from the hydrogen filter through a second connecting joint, and one end of the second connecting joint points upward as a hydrogen outlet, and the various components are connected through pipelines.

2. A hydrogen flow control device according to claim 1, characterized in that: The two first connection joints are respectively four-way joints, and the ports adjacent to the hydrogen filter connection port on the two first connection joints are connected through a three-way joint, and the other end of the three-way joint is connected to one port of the second connection joint.

3. A hydrogen flow control device according to claim 2, characterized in that: A first one-way valve is respectively arranged between the two first connecting joints and the second connecting joints.

4. A hydrogen flow control device according to claim 3, characterized in that: One end of the two first connection joints extends outward, and one end of the two first connection joints is respectively connected to a pressure sensor.

5. A hydrogen flow control device according to claim 4, characterized in that: A metering valve is arranged between the three-way joint and the second connecting joint.

6. A hydrogen flow control device according to claim 5, characterized in that: A reducing joint is respectively provided between the three-way joint, the second connecting joint and the metering valve.

7. A hydrogen flow control device according to claim 6, characterized in that: The pipeline is a tube, and the tube includes a straight tube and a bent tube.

8. A hydrogen flow control device according to claim 7, characterized in that: The straight pipes and bent pipes used are of the same specification and length.

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