Stable and automatic gas supply device for hydrogen production machine under no-buffer condition

Abstract

The invention relates to a stable automatic gas supply device for a hydrogen production machine under a buffer-free condition, which comprises a hydrogen production device and a use terminal, and the hydrogen production device is connected with the use terminal through a conveying pipeline; the three-way valve is arranged on the conveying pipeline between the hydrogen production device and the use terminal, and a bypass valve port of the three-way valve is connected with a flame arrester through an emptying pipeline. Hydrogen is generated through the small-sized hydrogen production device, the gas supply pressure and the power of the hydrogen production device are adjusted under the manual control of the three-way valve or the PLC control, the hydrogen is stably supplied to the use terminal, the hydrogen emission is reduced to the maximum extent, and the electric energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen delivery equipment, and in particular to a stable automatic gas supply device for a hydrogen generator under non-buffering conditions. Background Art

[0002] In hydrogen-using terminals such as semiconductor equipment such as epitaxial furnaces, and other densely populated areas and high safety requirements where it is not possible to use bottled or buffer tanks to store hydrogen, hydrogen production equipment is required to stably supply hydrogen to the using terminals.

[0003] However, the existing small-scale water electrolysis hydrogen production equipment needs to be equipped with a buffer tank to ensure the stability of the terminal pressure and flow rate when the terminal gas consumption is unstable, which increases the storage safety risk, thus limiting its use in densely populated areas and key areas such as university laboratories. In addition, the gas output of the hydrogen generator in the existing equipment is greater than the usage, and the safety valve needs to frequently discharge excess gas, which not only causes waste, but also poses safety risks such as fire, lightning strike, and explosion.

[0004] Therefore, a novel air supply device is urgently needed to solve the above problems. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a stable automatic gas supply device for a hydrogen production machine under non-buffered conditions. Hydrogen is generated by a small hydrogen production device, and the three-way valve is manually or PLC-controlled to adjust the gas supply pressure and the power of the hydrogen production device, so as to stably supply hydrogen to the user terminal, minimize hydrogen emissions, and reduce electricity consumption.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The stable automatic gas supply device for a hydrogen generator under non-buffered conditions described in the present invention comprises: a hydrogen generator and a use terminal, wherein the hydrogen generator and the use terminal are connected via a delivery pipeline; a three-way valve, which is arranged on the delivery pipeline between the hydrogen generator and the use terminal, and a bypass valve port of the three-way valve is connected to a flame arrester via an exhaust pipeline.

[0008] The stable automatic gas supply device for the hydrogen generator under non-buffered conditions preferably further comprises a pressure transmitter; the pressure transmitter is arranged on the delivery pipeline between the hydrogen generator and the user terminal, and is located downstream of the three-way valve;

[0009] The pressure transmitter is used to detect the size of the gas supply pressure and output a signal.

[0010] The stable automatic gas supply device for the hydrogen generator under non-buffered conditions preferably also includes a check valve; the check valve is arranged on the delivery pipeline between the hydrogen generator and the three-way valve to prevent hydrogen backflow.

[0011] The stable automatic gas supply device for the hydrogen generator under non-buffered conditions is preferably configured such that the three-way valve is a mechanical three-way valve, so that when the gas supply pressure passing through the three-way valve is higher than the highest emptying threshold set for the three-way valve, the bypass valve of the three-way valve is manually opened, and when the gas supply pressure passing through the three-way valve is lower than the lowest emptying threshold set for the three-way valve, the bypass valve of the three-way valve is manually closed.

[0012] The stable automatic gas supply device for a hydrogen generator under non-buffered conditions preferably further comprises a manipulator, which is used to open or close the bypass valve of the three-way valve.

[0013] In the stable automatic gas supply device for a hydrogen generator under non-buffered conditions, preferably, the three-way valve is a solenoid valve.

[0014] The stable automatic gas supply device for the hydrogen generator under non-buffered conditions preferably also includes a PLC; the PLC is electrically or signal-connected to the three-way valve, the pressure transmitter and the hydrogen generator respectively; the PLC is used to adjust the opening and closing of the bypass valve port of the three-way valve and the current of the hydrogen generator according to the size of the hydrogen use pressure.

[0015] The present invention adopts the above technical solution, which has the following advantages:

[0016] (1) The present invention can effectively reduce safety spacing requirements and safety review requirements in densely populated areas and key safety areas such as university laboratories;

[0017] (2) The present invention can reduce the number of buffer tanks and auxiliary equipment, thereby reducing equipment costs and safety protection costs;

[0018] (3) The present invention can reduce the storage of hydrogen buffer tanks, reduce the number of times the three-way valve is emptied, and reduce potential safety risks such as explosion, fire, and lightning strike;

[0019] (4) The present invention can reduce the emission of hydrogen and the power consumption of the hydrogen production device, thereby achieving the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] The reference numerals in the figures are as follows:

[0023] 1-Hydrogen production device; 2-Transmission pipeline; 3-Three-way valve; 4-Evacuation pipeline; 5-Flame arrester; 6-Pressure transmitter; 7-Check valve; 8-PLC. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0025] The present invention provides a stable automatic gas supply device for a hydrogen generator under non-buffered conditions. A small hydrogen generator generates hydrogen, and a three-way valve is manually or PLC-controlled to adjust the gas supply pressure and the power of the hydrogen generator, so as to stably supply hydrogen to a user terminal, minimize hydrogen emissions, and reduce power consumption.

[0026] like Figure 1 As shown, the present invention provides a stable automatic gas supply device for a hydrogen generator under non-buffered conditions, comprising: a hydrogen generator 1 and a use terminal, wherein the hydrogen generator 1 and the use terminal are connected via a delivery pipeline 2; a three-way valve 3, which is arranged on the delivery pipeline 2 between the hydrogen generator 1 and the use terminal, and a bypass valve port of the three-way valve 3 is connected to a flame arrester 5 via an exhaust pipeline 4.

[0027] In the above embodiment, preferably, the present invention further includes a pressure transmitter 6; the pressure transmitter 6 is arranged on the delivery pipeline 2 between the hydrogen production device 1 and the user terminal, and is located downstream of the three-way valve 3; the pressure transmitter 6 is used to detect the size of the gas supply pressure and output a signal.

[0028] In the above embodiment, preferably, the present invention further comprises a check valve 7; the check valve 7 is arranged on the delivery pipeline 2 between the hydrogen production device 1 and the three-way valve 3 to prevent hydrogen from flowing back.

[0029] In the above embodiment, preferably, the three-way valve 3 is a mechanical three-way valve, so that when the air supply pressure passing through the three-way valve is higher than the highest emptying threshold set for the three-way valve, the bypass valve of the three-way valve is manually opened, and when the air supply pressure passing through the three-way valve is lower than the lowest emptying threshold set for the three-way valve, the bypass valve of the three-way valve is manually closed.

[0030] In the above embodiment, preferably, the present invention further comprises a manipulator (not shown in the figure), which is used to open or close the bypass valve of the three-way valve.

[0031] In the above embodiment, preferably, the three-way valve 3 is a solenoid valve.

[0032] In the above embodiments, preferably, the present invention further includes PLC8; PLC is electrically connected or signal-connected to the three-way valve 3, pressure transmitter 6 and hydrogen production device 1 respectively; PLC8 is used to adjust the opening and closing of the bypass valve port of the three-way valve 3 and the current size of the hydrogen production device 1 according to the size of the hydrogen use pressure.

[0033] It should be noted that the small water electrolysis hydrogen generator is referred to as the hydrogen production device. The three-way valve is a control component in the fluid delivery system, which has the functions of shutoff, regulation, diversion, prevention of backflow, voltage stabilization, diversion or overflow. The hydrogen production device and the three-way valve are both mature components that can be directly purchased on the market, and their specific structures are not described here.

[0034] Embodiment 1:

[0035] Manual control: If the power adjustment range of the hydrogen production device is 0-1800A, the generated hydrogen pressure is 0-1.6 MPa, and the terminal gas supply pressure requirement is not less than 0.55 MPa and not more than 1.0 MPa, then the three-way valve emptying threshold can be set to 0.65-0.95 MPa. When the gas production pressure is greater than 0.95 MPa, the three-way valve bypass opens and the hydrogen is emptied. When the pressure at the gas production end drops to 0.65 MPa, the bypass is closed and the gas supply is opened directly. During the emptying stage, the gas terminal continues to use the gas in the pipeline. Before the direct opening of the gas supply, it is necessary to ensure that the pressure in the terminal pipeline is higher than 0.55 MPa. In this way, the terminal can be stably supplied with gas under the control of the pressure regulating valve and flow meter.

[0036] Embodiment 2:

[0037] Automatic control: A central threshold is set for the hydrogen production device and the gas supply pressure respectively (set according to the typical usage of the terminal), such as: the current is set to 1200A, the gas supply pressure is 0.80 MPa, when the equipment is stable, the manual control is switched to automatic control, the emptying valve is started once every 5 minutes, at which time the gas production is greater than the usage, and the current of the hydrogen production device is -50A; when the hydrogen supply pressure is ≤0.75 MPa for more than 1 minute, the current of the hydrogen production device is +25A per minute; when the hydrogen supply pressure is ≤0.70 MPa for more than 1 minute, the current of the hydrogen production device is +50A per minute; when the hydrogen supply pressure is ≥0.85 MPa for more than 1 minute, the current of the hydrogen production device is -25A per minute, and when the hydrogen supply pressure is ≥0.90 MPa for more than 1 minute, the current of the hydrogen production device is -50A per minute; and so on. All pressure thresholds and time nodes need to match the actual usage, so that the gas production of the hydrogen production device matches the actual usage of the equipment, thereby minimizing the number of emptying times of the three-way valve.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stable automatic gas supply device for a hydrogen generator under non-buffered conditions, characterized in that: include: A hydrogen production device and a use terminal, wherein the hydrogen production device and the use terminal are connected via a transmission pipeline; The three-way valve is arranged on the delivery pipeline between the hydrogen production device and the use terminal, and the bypass valve port of the three-way valve is connected to a flame arrester through an exhaust pipeline.

2. The stable automatic gas supply device for a hydrogen generator under non-buffered conditions according to claim 1 is characterized in that: Also included is a pressure transmitter; The pressure transmitter is arranged on the delivery pipeline between the hydrogen production device and the user terminal, and is located downstream of the three-way valve; The pressure transmitter is used to detect the size of the gas supply pressure and output a signal.

3. The stable automatic gas supply device for a hydrogen generator under non-buffered conditions according to claim 1 is characterized in that: Also includes a check valve; The check valve is arranged on the delivery pipeline between the hydrogen production device and the three-way valve to prevent hydrogen from flowing back.

4. The stable automatic gas supply device for a hydrogen generator under non-buffered conditions according to claim 1 is characterized in that: The three-way valve is a mechanical three-way valve, so that when the air supply pressure passing through the three-way valve is higher than the highest emptying threshold set for the three-way valve, the bypass valve of the three-way valve is manually opened, and when the air supply pressure passing through the three-way valve is lower than the lowest emptying threshold set for the three-way valve, the bypass valve of the three-way valve is manually closed.

5. The stable automatic gas supply device for a hydrogen generator under non-buffered conditions according to claim 4 is characterized in that: Also included is a robot, which is used to open or close the bypass valve of the three-way valve.

6. The stable automatic gas supply device for a hydrogen generator under non-buffered conditions according to claim 2 is characterized in that: The three-way valve is a solenoid valve.

7. The stable automatic gas supply device for a hydrogen generator under non-buffered conditions according to claim 6 is characterized in that: It also includes a PLC; the PLC is electrically or signal-connected to the three-way valve, the pressure transmitter and the hydrogen production device respectively; The PLC is used to adjust the opening and closing of the bypass valve port of the three-way valve and the current size of the hydrogen production device according to the size of the hydrogen use pressure.

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