CN113451616A - Hydrogen injection circulating valve - Google Patents
Hydrogen injection circulating valve Download PDFInfo
- Publication number
- CN113451616A CN113451616A CN202110709101.6A CN202110709101A CN113451616A CN 113451616 A CN113451616 A CN 113451616A CN 202110709101 A CN202110709101 A CN 202110709101A CN 113451616 A CN113451616 A CN 113451616A
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- Prior art keywords
- hydrogen
- water
- outlet
- separation chamber
- gas separation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
A hydrogen injection circulating valve relates to the technical field of injection circulating valves. The hydrogen injection circulating valve comprises a hydrogen supply assembly, a hydrogen return assembly and a shell; the shell is provided with a hydrogen inlet, a nitrogen inlet, a mixed hydrogen outlet, a hydrogen return port and a water outlet; the hydrogen supply assembly comprises a hydrogen supply pipe, a venturi tube, a hydrogen stop valve, a proportional valve, an air inlet pressure sensor and a precise pressure sensor arranged at the outlet of the venturi tube, one end of the hydrogen supply pipe is connected to the hydrogen port, and the outlet of the venturi tube is connected to the mixed hydrogen outlet; the hydrogen return component comprises a water-gas separation chamber and a water collection box which are arranged from top to bottom, the lower end of the water-gas separation chamber is communicated to the hydrogen return port, and the upper end of the water-gas separation chamber is communicated to the vacuum contraction section of the Venturi tube; the water collecting box is provided with a water outlet and a drainage stop valve connected to the water outlet; the water-gas separation chamber is provided with a hydrogen differential pressure sensor. The hydrogen injection circulating valve can realize hydrogen recycling through water-gas separation and injection hydrogen return, and hydrogen waste is reduced.
Description
Technical Field
The invention relates to the technical field of injection circulating valves, in particular to a hydrogen injection circulating valve.
Background
In a fuel cell, hydrogen is a very important raw material gas, and after entering a reactor for reaction, a tail gas formed by combination of water vapor and hydrogen is discharged. In the conventional design, the above-mentioned water vapor and hydrogen combination is often directly discharged, which results in the waste of hydrogen, not only increases the energy consumption of the hydrogen fuel cell, but also increases the use cost.
Disclosure of Invention
The invention aims to provide a hydrogen injection circulating valve which can realize hydrogen recycling and reduce hydrogen waste by separating water from gas and injecting back hydrogen.
The embodiment of the invention is realized by the following steps:
a hydrogen injection circulating valve comprises a hydrogen supply assembly, a hydrogen return assembly connected to the gas supply assembly, and a shell sleeved outside the hydrogen supply assembly and the hydrogen return assembly;
the shell is provided with a hydrogen inlet, a nitrogen inlet, a mixed hydrogen outlet communicated with the nitrogen inlet, a hydrogen return port and a water outlet;
the hydrogen supply assembly comprises a hydrogen supply pipe, a venturi tube connected to the hydrogen supply pipe, a hydrogen stop valve arranged on the hydrogen supply pipe, a proportional valve and an air inlet pressure sensor which are arranged at the inlet of the venturi tube, and a precise pressure sensor arranged at the outlet of the venturi tube, wherein one end of the hydrogen supply pipe is connected to a hydrogen port, and the outlet of the venturi tube is connected to a mixed hydrogen outlet through a hydrogen outlet mixing chamber;
the hydrogen return component comprises a water-gas separation chamber and a water collection box which are arranged from top to bottom, the lower end of the water-gas separation chamber is communicated to the hydrogen return port, and the upper end of the water-gas separation chamber is communicated to the vacuum contraction section of the Venturi tube; the water collecting box is provided with a water outlet and a drainage stop valve connected to the water outlet; the water-gas separation chamber is provided with a hydrogen differential pressure sensor.
Further, in a preferred embodiment of the present invention, the water-gas separation chamber comprises two molecular sieve separation chambers arranged in parallel.
Further, in a preferred embodiment of the present invention, two sintered tubes of granular stainless steel extending vertically and spaced apart horizontally are disposed in the molecular sieve separation chamber.
Further, in a preferred embodiment of the present invention, the diameter of the granular stainless steel sintered pipe is 0.10 μm.
Further, in a preferred embodiment of the invention, the venturi tube has a vacuum ratio of 1.8: 1.
Further, in a preferred embodiment of the present invention, the heater is a PTC constant temperature heater.
Further, in a preferred embodiment of the present invention, a nitrogen stop valve is disposed on the nitrogen inlet.
Further, in a preferred embodiment of the present invention, the hydrogen differential pressure sensor is a high-precision hydrogen-corrosion-resistant gold-plated diaphragm sensor.
Compared with the prior art, the hydrogen injection circulating valve has the beneficial effects that:
(1) through water-gas separation and injection hydrogen return, hydrogen recycling is realized, and hydrogen waste is reduced.
(2) Completely covers all functional requirements of the existing fuel cell system on a hydrogen gas circuit, and highly integrates hydrogen supply and hydrogen return.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a hydrogen injection circulation valve according to an embodiment of the present invention.
Icon: 100-a hydrogen injection circulation valve; 111-a hydrogen supply tube; 112-a venturi tube; 113-hydrogen shut-off valve; 114-a proportional valve; 115-intake pressure sensor; 116-a precision pressure sensor; 121-a water-gas separation chamber; 122-a water collection box; 124-a drainage stop valve; 125-hydrogen differential pressure sensor; 126-a heater; 127-granular stainless steel sintered tube; 131-a hydrogen inlet; 132-a nitrogen inlet; 133-a mixed hydrogen outlet; 134-hydrogen return port; 135-water outlet; 136-nitrogen stop valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1, the present embodiment provides a hydrogen injection circulation valve 100, which includes a hydrogen supply assembly, a hydrogen return assembly, and a housing. The hydrogen supply assembly and the hydrogen return assembly are arranged in the shell. The hydrogen supply assembly is used for conveying raw material hydrogen. The hydrogen return component is used for recovering and treating the water vapor hydrogen combination.
Referring to fig. 1, the housing is provided with a hydrogen inlet 131, a nitrogen inlet 132, a mixed hydrogen outlet 133, a hydrogen return port 134 and a water outlet 135. The mixed hydrogen outlet 133 is connected to the nitrogen inlet 132. The nitrogen inlet 132 is provided with a nitrogen stop valve 136 for controlling the opening and closing of the nitrogen inlet 132. When the hydrogen fuel cell is started and shut down, the nitrogen stop valve 136 is opened, the nitrogen inlet 132 is filled with nitrogen, the filled nitrogen enters the cell stack through the mixed hydrogen outlet 133 to be purged, and residual gas is discharged, so that the risk of generating residual hydrogen or oxygen in the hydrogen fuel cell cavity and an oxygen-enriched hydrogen interface on the hydrogen side are avoided, and further potential safety hazards are caused. In other embodiments, the nitrogen stop valve 136 may not be provided, and a valve may be provided on the nitrogen source to control whether to input nitrogen, which is also within the protection scope of the present embodiment.
With continued reference to fig. 1, the hydrogen supply assembly includes a hydrogen supply pipe 111, a venturi 112, a hydrogen shut-off valve 113, a proportional valve 114, an intake pressure sensor 115, and a precision pressure sensor 116. One end of the hydrogen supply pipe 111 is connected to a hydrogen gas port, and hydrogen gas enters the hydrogen supply pipe 111 from the hydrogen gas port to be delivered. A hydrogen shut-off valve 113 is provided on the hydrogen supply pipe 111 for controlling opening and closing of the hydrogen gas. The inlet of the venturi 112 is provided with a proportional valve 114, which is used to precisely control the hydrogen pressure and ensure the pressure in the stack to be stable. The hydrogen stop valve 113 on the hydrogen supply pipe 111 is opened, hydrogen flows into the hydrogen supply pipe 111 from the hydrogen inlet 131, the pressure of the hydrogen is controlled within a certain range by the proportional valve 114 at the inlet of the venturi pipe 112, the pressure-controlled hydrogen enters the venturi pipe 112, and the hydrogen is discharged from the outlet of the venturi pipe 112 and then sequentially discharged through the hydrogen outlet mixing chamber and the mixed hydrogen outlet 133.
Note that, in the present embodiment, the vacuum ratio of the venturi tube 112 is 1.8: 1. In other embodiments, the vacuum ratio of the venturi 112 may be other values, and the technical effect of the present embodiment of sucking the separated hydrogen is within the protection scope of the present embodiment.
With continued reference to fig. 1, the hydrogen recovery assembly includes a water-gas separation chamber 121 and a water collection box 122. The water-gas separation chamber 121 and the water collection box 122 are disposed from top to bottom. The lower end of the water-gas separation chamber 121 is communicated to the hydrogen return port 134. The upper end of the water-gas separation chamber 121 is communicated to the vacuum contraction section of the venturi tube 112. The water collecting box 122 is communicated with the water outlet 135. The water outlet 135 is provided with a drain cut-off valve 124, and the drain cut-off valve 124 is used for opening or closing the water outlet 135. The hydrogen gas pressure difference sensor 125 is provided on the water-gas separation chamber 121. After the water is discharged by the water discharge stop valve 124, the pressure of the gas in the water-gas separation chamber 121 is instantaneously reduced, and whether the water is discharged completely can be determined by using the value of the hydrogen pressure difference sensor 125, where the value of the hydrogen pressure difference sensor 125 is the difference between the intake pressure sensor 115 and the precision pressure sensor 116. In a fuel cell, hydrogen gas enters a stack to form a water vapor hydrogen combined tail gas. The tail gas enters the hydrogen injection circulation valve 100 from the hydrogen return port 134, moisture and impurities in the hydrogen gas are filtered when the tail gas passes through the water-gas separation chamber 121, the moisture containing the impurities falls into the water collection box 122 under the action of gravity, and the separated hydrogen gas is conveyed to the vacuum contraction section of the venturi tube 112. The drainage cut-off valve 124 for controlling the opening and closing of the water outlet 135 is opened at a fixed time, so that the fixed-time drainage of the water in the water collecting box 122 is realized. After the water is discharged, the gas discharge speed is high, and the hydrogen differential pressure sensor 125 closes the water discharge stop valve 124 after detecting the pressure change. Due to the vacuum characteristic of the venturi tube 112, the venturi tube 112 sucks the separated hydrogen, and injects the hydrogen together with the raw material hydrogen into the reactor for reaction again.
In the present embodiment, the lower end of the sump case 122 is further provided with a heater 126 for preventing water from freezing at a low temperature. The heater 126 is a PTC constant temperature heater 126, which can effectively prevent the water in the water collecting box 122 from freezing at low temperature and affecting the discharge of water. In other embodiments, the heater 126 may not be provided, and the heater 126 is disposed outside the hydrogen injection circulation valve 100 to raise the ambient temperature, so as to achieve the technical effect of preventing water from freezing at low temperature, which is within the protection scope of the present embodiment.
With continued reference to FIG. 1, the water-gas separation chamber 121 includes two molecular sieve separation chambers (not shown) arranged in parallel. Two granular stainless steel sintered pipes 127 which vertically extend and are arranged at intervals in the horizontal direction are arranged in the molecular sieve separation chamber. The diameter of the granular stainless steel sintered pipe 127 was 0.10. mu.m. In the present embodiment, the diameter of the granular stainless steel sintered pipe 127 is 0.10 μm. In other embodiments, other diameters are possible, and the technical effect of effectively filtering the moisture and impurities in the hydrogen gas is within the protection scope of the present embodiment.
In the present embodiment, the hydrogen gas pressure difference sensor 125 is a high-precision hydrogen-corrosion-resistant gold-plated diaphragm sensor. The sensor has a long service life in the working environment of the water-gas separation chamber 121, so that the service life of the whole hydrogen injection circulation valve 100 is prolonged, and the sensor is also in the protection range of the embodiment.
In summary, the hydrogen injection circulation valve provided by the invention realizes hydrogen recycling and reduces hydrogen waste through water-gas separation and injection hydrogen return. Completely covers all functional requirements of the existing fuel cell system on a hydrogen gas circuit, and highly integrates hydrogen supply and hydrogen return.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The hydrogen injection circulating valve is characterized by comprising a hydrogen supply component, a hydrogen return component connected to the hydrogen supply component, and a shell sleeved outside the hydrogen supply component and the hydrogen return component;
the shell is provided with a hydrogen inlet, a nitrogen inlet, a mixed hydrogen outlet communicated with the nitrogen inlet, a hydrogen return port and a water outlet;
the hydrogen supply assembly comprises a hydrogen supply pipe, a Venturi pipe connected to the hydrogen supply pipe, a hydrogen stop valve arranged on the hydrogen supply pipe, a proportional valve and an air inlet pressure sensor which are arranged at the inlet of the Venturi pipe, and a precise pressure sensor arranged at the outlet of the Venturi pipe, wherein one end of the hydrogen supply pipe is connected to the hydrogen port, and the outlet of the Venturi pipe is connected to the mixed hydrogen outlet through a hydrogen outlet mixing chamber;
the hydrogen return component comprises a water-gas separation chamber and a water collection box which are arranged from top to bottom, the lower end of the water-gas separation chamber is communicated to the hydrogen return port, and the upper end of the water-gas separation chamber is communicated to the vacuum contraction section of the Venturi tube; the water collecting box is provided with a water outlet and a drainage stop valve connected to the water outlet; and a hydrogen pressure difference sensor is arranged on the water-gas separation chamber.
2. The hydrogen injection circulation valve according to claim 1, wherein the water-gas separation chamber comprises two molecular sieve separation chambers arranged in parallel.
3. The hydrogen injection circulation valve according to claim 2, wherein two sintered granular stainless steel tubes extending vertically and spaced apart horizontally are disposed in the molecular sieve separation chamber.
4. The hydrogen injection circulation valve of claim 3 wherein the sintered granular stainless steel tube has a diameter of 0.10 μm.
5. The hydrogen injection circulation valve of claim 1, wherein the venturi has a vacuum ratio of 1.8: 1.
6. The hydrogen injection circulation valve according to claim 1, wherein the lower end of the water collecting box is provided with a heater for preventing water from freezing at low temperature.
7. The hydrogen injection circulation valve of claim 6 wherein the heater is a PTC thermostatic heater.
8. The hydrogen injection circulation valve according to claim 1, wherein a nitrogen stop valve is disposed on the nitrogen inlet.
9. The hydrogen injection circulation valve according to claim 1, wherein the hydrogen differential pressure sensor is a high-precision hydrogen corrosion-resistant gold-plated diaphragm sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110709101.6A CN113451616A (en) | 2021-06-25 | 2021-06-25 | Hydrogen injection circulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110709101.6A CN113451616A (en) | 2021-06-25 | 2021-06-25 | Hydrogen injection circulating valve |
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| Publication Number | Publication Date |
|---|---|
| CN113451616A true CN113451616A (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110709101.6A Pending CN113451616A (en) | 2021-06-25 | 2021-06-25 | Hydrogen injection circulating valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964355A (en) * | 2021-10-29 | 2022-01-21 | 北京亿华通科技股份有限公司 | Detection control device and method of ejector and fuel cell system |
| GB2620610A (en) * | 2022-07-13 | 2024-01-17 | Enapter Gmbh | Backflow suppression system |
-
2021
- 2021-06-25 CN CN202110709101.6A patent/CN113451616A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964355A (en) * | 2021-10-29 | 2022-01-21 | 北京亿华通科技股份有限公司 | Detection control device and method of ejector and fuel cell system |
| CN113964355B (en) * | 2021-10-29 | 2023-02-24 | 北京亿华通科技股份有限公司 | Detection control device and method of ejector and fuel cell system |
| GB2620610A (en) * | 2022-07-13 | 2024-01-17 | Enapter Gmbh | Backflow suppression system |
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