Hydrogen-containing mixed gas distribution system and method based on hydrogen storage material

Abstract

The invention relates to the field of hydrogenation and hydrogen transportation, and discloses a hydrogen-containing mixed gas distribution system and method based on a hydrogen storage material, and the system comprises a hydrogen-containing mixed gas source, a hydrogen storage unit, a sensing unit, a control unit, a buffer unit and a hydrogen using end; the hydrogen storage unit obtains hydrogen in the hydrogen-containing mixed gas source through a hydrogen conveying pipeline; the sensing unit is electrically connected with the control unit; the sensing unit obtains the hydrogen concentration and transmits the hydrogen concentration to the control unit, and the control unit controls the hydrogen concentration obtained by the hydrogen storage unit; the buffer unit is used for storing the mixed gas with the target hydrogen concentration and transmitting the mixed gas with the target hydrogen concentration to the hydrogen using end. The device has the beneficial effects that the hydrogen-containing gas concentration can be changed at any time according to user requirements, the complex operation of the gas distribution process is greatly simplified, the safety is high, and the structure is simple; meanwhile, the pure hydrogen buffer tank is arranged, redundant hydrogen can be stored in the pure hydrogen buffer tank, and in addition, hydrogen needs to be released after the hydrogen storage material absorbs hydrogen to be saturated, so that the hydrogen absorption capacity of the hydrogen storage material is recovered.

Description

Technical Field

[0001] The present invention relates to the field of hydrogenation and hydrogen transportation, and in particular to a hydrogen-containing mixed gas distribution system and method based on hydrogen storage materials. Background Art

[0002] Traditional hydrogen-containing mixed gas distribution usually involves filling a certain amount of hydrogen and the gas to be mixed into a cylinder based on mass calculation. The concentration of the hydrogen-containing gas cannot be adjusted at any time, and the operation is complicated. Summary of the invention

[0003] The purpose of the present invention is to propose a hydrogen-containing mixed gas distribution system based on hydrogen storage materials to solve the technical problems that the concentration of hydrogen-containing gas cannot be adjusted at any time in the traditional gas distribution system and the operation is complicated.

[0004] The present invention provides a hydrogen-containing mixed gas distribution system based on hydrogen storage materials, comprising:

[0005] A hydrogen-containing mixed gas source, a hydrogen storage unit, a sensor unit, a control unit, a buffer unit and a hydrogen-using end;

[0006] The hydrogen storage unit obtains hydrogen from the hydrogen-containing mixed gas source through a hydrogen transmission pipeline;

[0007] The sensing unit is electrically connected to the control unit;

[0008] The sensing unit obtains the hydrogen concentration and transmits it to the control unit, and the control unit controls the hydrogen concentration obtained by the hydrogen storage unit;

[0009] The buffer unit is used to store the mixed gas with the target hydrogen concentration and transmit the mixed gas with the target hydrogen concentration to the hydrogen-using end.

[0010] A hydrogen-containing mixed gas distribution method based on a hydrogen storage material is applied to a hydrogen-containing mixed gas distribution system based on a hydrogen storage material, and the method comprises the following steps:

[0011] S1. Preset the target concentration of hydrogen in the mixed gas by the control unit;

[0012] S2, the hydrogen-containing mixed gas source is transported to the hydrogen storage unit according to the target concentration and the established flow ratio;

[0013] S3, when the hydrogen storage unit transmits hydrogen, the real-time concentration is detected by the sensing unit. If there is a deviation between the real-time concentration and the target concentration, the flow rate ratio is adjusted by the control unit until the real-time concentration is equal to the target concentration;

[0014] S4. The hydrogen-containing mixed gas of target concentration is transported to the buffer unit, and then transported from the buffer unit to the hydrogen-using end through a pressurizing device.

[0015] The beneficial effects provided by the present invention are as follows: after the introduction of the control unit and the sensor unit, the gas distribution is made flexible and convenient, the concentration of the hydrogen-containing gas can be changed at any time according to user needs, which greatly simplifies the complex operation of the gas distribution process, and has high safety and simple structure; at the same time, a pure hydrogen buffer tank is provided, and excess hydrogen can be stored in the pure hydrogen buffer tank. In addition, when the hydrogen storage material is saturated with hydrogen, hydrogen needs to be released to restore its hydrogen absorption capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic flow chart of the method of the present invention;

[0017] Figure 2 It is a detailed flow chart of the method of the present invention. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] Before formally describing the present invention, the scheme of the present invention is first generally described for easy understanding.

[0020] Please refer to Figure 1 Figure 1 It is a structural schematic diagram of the system of the present invention;

[0021] The present invention provides a hydrogen-containing mixed gas distribution system based on hydrogen storage materials, comprising:

[0022] A hydrogen-containing mixed gas source, a hydrogen storage unit, a sensor unit, a control unit, a buffer unit and a hydrogen-using end;

[0023] The hydrogen storage unit obtains hydrogen from the hydrogen-containing mixed gas source through a hydrogen transmission pipeline;

[0024] The sensing unit is electrically connected to the control unit;

[0025] The sensing unit obtains the hydrogen concentration and transmits it to the control unit, and the control unit controls the hydrogen concentration obtained by the hydrogen storage unit;

[0026] The buffer unit is used to store the mixed gas with the target hydrogen concentration and transmit the mixed gas with the target hydrogen concentration to the hydrogen-using end.

[0027] It should be noted that the hydrogen storage unit includes multiple groups of hydrogen storage devices and corresponding multiple groups of heaters; different groups of hydrogen storage devices and heaters are connected in parallel.

[0028] As an embodiment, a hydrogen storage device is filled with hydrogen storage material and maintained at a certain temperature by a heating device to achieve hydrogen absorption and desorption; the heater provides the hydrogen storage device with the heat required for hydrogen absorption and desorption and maintains the specific temperature requirements of the hydrogen storage device.

[0029] The hydrogen storage device and heater are connected in parallel to the system in multiple groups. The hydrogen storage device is set with different temperature differences, which can be selectively turned on and off according to actual needs through the control unit. For example, when the hydrogen storage temperature is required to be 1, the hydrogen storage device and heater of this group can be turned on, and the other groups can be turned off at the same time.

[0030] It should be noted that the sensing unit includes: a first gas concentration sensor and a second gas concentration sensor; the first gas concentration sensor is installed between the hydrogen storage unit and the buffer unit; the second gas concentration sensor is installed between the buffer unit and the hydrogen use end.

[0031] As an embodiment, a first gas concentration sensor is provided at the outlet of the hydrogen storage device, and the first gas concentration sensor detects the concentration of the hydrogen-containing impurity gas after the hydrogen storage device absorbs hydrogen, and transmits the concentration signal of the hydrogen-containing impurity gas to the computer software analysis module. It should be noted that the control unit includes a mass flow controller and a computer software analysis module.

[0032] The computer software receives the gas sensor signal and transmits the processed data signal to the mass flow controller according to the user information processing to change the opening of the mass flow controller to adjust the flow rate;

[0033] It should be noted that the buffer unit includes: a target concentration mixed gas buffer tank and a pure hydrogen buffer tank; the target concentration mixed gas buffer tank and the pure hydrogen buffer tank are connected to the hydrogen storage unit via a three-way ball valve.

[0034] As an embodiment, a second gas concentration sensor is further provided between the target concentration mixed gas buffer tank and the hydrogen use end; specifically, it is provided at the outlet of the target concentration mixed gas buffer tank.

[0035] It should be noted that the second gas concentration sensor is used to detect the concentration of hydrogen-containing mixed gas in the target concentration mixed gas buffer tank. The concentration is sent to the control unit to determine whether the hydrogen concentration reaches the target value and is adjusted by the control unit. The detailed adjustment is described in the subsequent method section.

[0036] As an embodiment, the target concentration mixed gas buffer tank is used to temporarily store the configured target concentration mixed gas during gas distribution, and the pure hydrogen buffer tank is used to release hydrogen when the hydrogen storage material is saturated with hydrogen to restore its hydrogen absorption capacity.

[0037] It should be noted that a one-way valve is provided between the hydrogen storage unit and the buffer unit, and a pressurizing device is provided between the buffer unit and the hydrogen using end.

[0038] As an embodiment, the main pipeline of the present invention is connected to two buffer tanks through two three-way ball valves respectively, and the two three-way ball valves are opened in the same direction to ensure that only one gas passes through the pressurizing device.

[0039] Please refer to Figure 2 , Figure 2 It is a detailed flow chart of the method of the present invention.

[0040] It should be noted that a method for distributing hydrogen-containing mixed gas based on hydrogen storage materials comprises the following steps:

[0041] S1. Preset the target concentration of hydrogen in the mixed gas by the control unit;

[0042] S2, the hydrogen-containing mixed gas source is transported to the hydrogen storage unit according to the target concentration and the predetermined flow ratio;

[0043] S3, when the hydrogen storage unit transmits hydrogen, the real-time concentration is detected by the sensing unit. If there is a deviation between the real-time concentration and the target concentration, the flow rate ratio is adjusted by the control unit until the real-time concentration is equal to the target concentration;

[0044] S4. The hydrogen-containing mixed gas of target concentration is transported to the buffer unit, and then transported from the buffer unit to the hydrogen-using end through a pressurizing device.

[0045] As an embodiment, the present invention sets a preset hydrogen target concentration through a computer analysis module; at the same time, the computer analysis module sets the temperature of the hydrogen storage device. At the corresponding temperature, the hydrogen storage device operates in a corresponding hydrogen absorption or release state, and hydrogen storage devices at other temperatures are closed.

[0046] After the preset is successful, the mass flow controller is turned on, and the mass flow controller works with a preset initial opening. At this time, in conjunction with the hydrogen absorption and desorption state of the hydrogen storage device, the hydrogen-containing mixed gas source is transported to the target concentration mixed gas buffer tank through a one-way valve. In this process, the hydrogen concentration is detected in real time by the first gas concentration sensor and the second gas concentration sensor, and the concentration is transmitted to the computer analysis module; after the computer analysis module compares the two real-time concentrations with the target concentration, if the real-time concentration is less than the target concentration, the mass flow controller opening is increased (or / and) to control the hydrogen storage device to be in a hydrogen release state, otherwise the mass flow controller opening is reduced (or / and) to control the hydrogen storage device to be in a hydrogen absorption state, and finally the target concentration mixed gas buffer tank stores the target concentration mixed gas; the target concentration mixed gas is transported to the hydrogen use end after passing through the pressurizing equipment.

[0047] It should be noted that the real-time concentration is based on the concentration of the target concentration mixed gas buffer tank, and the other real-time concentration is for reference or monitoring.

[0048] On the other hand, the present invention also provides a pure hydrogen buffer tank, which is used to release hydrogen when the hydrogen storage material is saturated with hydrogen to restore its hydrogen absorption capacity.

[0049] The beneficial effects of the present invention are as follows: after the introduction of the control unit and the sensor unit, the gas distribution is made flexible and convenient, the concentration of hydrogen-containing gas can be changed at any time according to user needs, which greatly simplifies the complex operation of the gas distribution process, and has high safety and simple structure; at the same time, a pure hydrogen buffer tank is provided, and excess hydrogen can be stored in the pure hydrogen buffer tank. In addition, when the hydrogen storage material is saturated with hydrogen, hydrogen needs to be released to restore its hydrogen absorption capacity.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials, characterized in that: include: A hydrogen-containing mixed gas source, a hydrogen storage unit, a sensor unit, a control unit, a buffer unit and a hydrogen-using end; The hydrogen storage unit obtains hydrogen from the hydrogen-containing mixed gas source through a hydrogen transmission pipeline; The sensing unit is electrically connected to the control unit; The sensing unit obtains the hydrogen concentration and transmits it to the control unit, and the control unit controls the hydrogen concentration obtained by the hydrogen storage unit; The buffer unit is used to store the mixed gas with the target hydrogen concentration and transmit the mixed gas with the target hydrogen concentration to the hydrogen-using end.

2. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials as claimed in claim 1, characterized in that: The hydrogen storage unit comprises a plurality of groups of hydrogen storage devices and a corresponding plurality of groups of heaters; different groups of hydrogen storage devices and heaters are connected in parallel.

3. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials as claimed in claim 1, characterized in that: The sensing unit comprises: a first gas concentration sensor and a second gas concentration sensor; the first gas concentration sensor is installed between the hydrogen storage unit and the buffer unit; the second gas concentration sensor is installed between the buffer unit and the hydrogen using end.

4. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials as claimed in claim 1, characterized in that: The control unit includes a mass flow controller and a computer software analysis module.

5. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials as claimed in claim 4, characterized in that: The mass flow controller is electrically connected to a computer, and a computer software analysis module in the computer transmits control instructions to the mass flow controller.

6. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials as claimed in claim 1, characterized in that: The buffer unit comprises: a target concentration mixed gas buffer tank and a pure hydrogen buffer tank; the target concentration mixed gas buffer tank and the pure hydrogen buffer tank are connected to the hydrogen storage unit via a three-way ball valve.

7. A hydrogen-containing mixed gas distribution system based on hydrogen storage materials as claimed in claim 1, characterized in that: A one-way valve is arranged between the hydrogen storage unit and the buffer unit, and a pressurizing device is arranged between the buffer unit and the hydrogen using end.

8. A method for distributing hydrogen-containing mixed gas based on hydrogen storage materials, using a hydrogen-containing mixed gas distribution system based on hydrogen storage materials according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. Preset the target concentration of hydrogen in the mixed gas by the control unit; S2, the hydrogen-containing mixed gas source is transported to the hydrogen storage unit according to the target concentration and the established flow ratio; S3, when the hydrogen storage unit transmits hydrogen, the real-time concentration is detected by the sensing unit. If there is a deviation between the real-time concentration and the target concentration, the flow rate ratio is adjusted by the control unit until the real-time concentration is equal to the target concentration; S4. The hydrogen-containing mixed gas of target concentration is transported to the buffer unit, and then transported from the buffer unit to the hydrogen-using end through a pressurizing device.

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