CN220285823U - System for generating hydrogen by utilizing differential pressure - Google Patents
System for generating hydrogen by utilizing differential pressure Download PDFInfo
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- CN220285823U CN220285823U CN202321619931.0U CN202321619931U CN220285823U CN 220285823 U CN220285823 U CN 220285823U CN 202321619931 U CN202321619931 U CN 202321619931U CN 220285823 U CN220285823 U CN 220285823U
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- hydrogen
- separator
- output end
- storage tank
- oxygen
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 103
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 103
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000003860 storage Methods 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000000746 purification Methods 0.000 claims abstract description 19
- 238000010248 power generation Methods 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 48
- 239000001301 oxygen Substances 0.000 claims description 48
- 229910052760 oxygen Inorganic materials 0.000 claims description 48
- 150000002431 hydrogen Chemical class 0.000 claims description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 48
- 239000003345 natural gas Substances 0.000 abstract description 24
- 230000005611 electricity Effects 0.000 abstract description 8
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229910001868 water Inorganic materials 0.000 description 7
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a hydrogen production system by utilizing differential pressure power generation, which comprises an expander, a generator, a preheater, a temperature re-setting device, an electrolytic tank, a separator, a purification device, a storage tank, a shutoff valve, a pressure sensor and a control device, wherein the pressure sensor is connected with the storage tank; the output end of the expansion machine is respectively connected with the input end of the preheater and the input end of the generator, and one end output end of the preheater is connected with the temperature re-setting device; the output end of the other end of the preheater is connected with a purifying device; the output end of the generator is connected with the input end of the electrolytic tank; the control device is respectively and electrically connected with the turn-off valve and the pressure sensor, and utilizes differential pressure residual energy to generate electricity and produce hydrogen and is doped into the natural gas pipeline for conveying, so that energy is saved, and the natural gas can be continuously conveyed in the conveying pipeline when the hydrogen is produced, so that when the pressure of the electrolytic hydrogen production system is overlarge, the hydrogen is discharged to the outside, the internal pressure of the electrolytic hydrogen production is reduced, and abnormal jump stop of the electrolytic hydrogen production caused by overlarge pressure is avoided.
Description
Technical Field
The utility model relates to the technology in the field of hydrogen production systems by utilizing differential pressure power generation, in particular to a hydrogen production system by utilizing differential pressure power generation.
Background
In order to reduce the pressure loss of an upstream pipeline and increase the conveying capacity of the pipeline, the gas supply pressure of the pipeline is usually about 10MPa, the gas pressure of the gas output by a downstream sub-conveying station is usually about 4MPa, the pressure regulation is carried out by setting a pressure regulator in the conventional mode, the high-pressure natural gas is regulated to be low-pressure output, a great deal of waste of the gas pressure energy is caused, and the method does not conform to the great direction of carbon emission reduction proposed by the present country, so that the part of differential pressure is required to be effectively utilized for energy development and utilization.
At present, some differential pressure utilization technologies exist in the natural gas field, but the technology of power generation or power generation and ice making is generally only slightly single in commercial mode.
Later on, a hydrogen production device using natural gas differential pressure power generation appears on the market, which comprises an electro-hydrolysis device, an expander and a generator, wherein the expander and the generator set are driven to generate electricity by utilizing the pressure difference in a natural gas conveying pipeline, the generated electricity is conveyed to an electrolysis water device to produce hydrogen, and the energy is saved, but the hydrogen production device using natural gas differential pressure power generation has the following defects:
the electrolytic water hydrogen production method is characterized in that the electrolytic solution in the water electrolytic tank is subjected to direct current electrolysis, liquid-containing hydrogen and oxygen are respectively generated at a cathode and an anode, then the liquid-containing hydrogen and the oxygen are sent to a hydrogen separator and an oxygen separator for gravity separation in two ways, the hydrogen and the oxygen are upwards sent to a gas consumption point, the electrolytic solution is downwards collected into a circulating pump through backflow and is sent to the electrolytic tank again to be electrolyzed, so that the hydrogen and the oxygen are generated in a reciprocating manner, and the pressure of an electrolytic hydrogen production system is overlarge due to the fact that the generated hydrogen cannot be timely used by hydrogen utilization equipment in the electrolytic hydrogen production process, so that the electrolytic hydrogen production system is stopped abnormally, and the production efficiency of the system is seriously influenced.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
In view of the above, the main object of the present utility model is to provide a system for generating hydrogen by differential pressure, which uses the residual energy of differential pressure to generate electricity and mix the hydrogen into a natural gas pipeline for transportation, thereby saving energy, and simultaneously, the transportation pipeline can continue to transport natural gas during hydrogen production, thereby realizing that hydrogen is discharged to the outside when the pressure of the electrolytic hydrogen production system is too high, reducing the internal pressure of the electrolytic hydrogen production, and avoiding abnormal jump stop of the electrolytic hydrogen production caused by the too high pressure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a hydrogen production system using differential pressure power generation comprises an expander, a generator, a preheater, a re-heater, an electrolytic tank, a separator, a purification device, a storage tank, a shutoff valve, a pressure sensor and a control device;
the output end of the expansion machine is respectively connected with the input end of the preheater and the input end of the generator, and one end output end of the preheater is connected with the temperature re-setting device; the output end of the other end of the preheater is connected with a purifying device; the output end of the generator is connected with the input end of the electrolytic tank;
the separator comprises a hydrogen separator and an oxygen separator, the output ends of the electrolytic tank are respectively connected with the hydrogen separator and the oxygen separator, the output ends of the hydrogen separator and the oxygen separator are respectively connected with the input end of the purifying device, the turn-off valve is arranged between the output end of the hydrogen separator and the input end of the purifying device, the pressure sensor is arranged between the output end of the hydrogen separator and the on-off valve, the output end of the purifying device is connected with the input end of the storage tank, and the control device is respectively electrically connected with the turn-off valve and the pressure sensor.
As a preferable scheme, the purifying device comprises a hydrogen purifying device and an oxygen purifying device, wherein the output end of the hydrogen separator is connected with the input end of the hydrogen purifying device, and the output end of the oxygen separator is connected with the input end of the oxygen purifying device.
As a preferable scheme, the shutoff valve is arranged between the output end of the hydrogen separator and the input end of the hydrogen purification device,
as a preferable scheme, the storage tank comprises a hydrogen storage tank and an oxygen storage tank, the output end of the hydrogen purification device is connected with the hydrogen storage tank, and the output end of the oxygen separator is connected with the oxygen storage tank.
As a preferable mode, one end of the hydrogen storage tank and one end of the oxygen storage tank are also connected with a first booster and a second booster respectively.
As a preferable mode, the expander is one of a turbine expander, a rotor expander and a screw expander.
Compared with the prior art, the utility model has obvious advantages and beneficial effects, in particular, the technical scheme shows that the hydrogen production device mainly utilizes the differential pressure residual energy to generate electricity and mix the hydrogen into a natural gas pipeline for transportation through structural design and cooperation among an expander, a generator, a preheater, a temperature re-heater, an electrolytic tank, a separator, a purification device, a storage tank, a cut-off valve, a pressure sensor and a control device, saves energy, can continuously transport natural gas in the transportation pipeline during hydrogen production, and particularly utilizes the control device to be respectively and electrically connected with the cut-off valve and the pressure sensor, thereby realizing that when the pressure of an electrolytic hydrogen production system is overlarge, the hydrogen is discharged to the outside, so that the internal pressure of the electrolytic hydrogen production is reduced, and abnormal jump of the electrolytic hydrogen production caused by overlarge pressure is avoided.
In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic view of a connection structure and a process flow according to an embodiment of the present utility model;
FIG. 2 is another schematic diagram of a connection structure and a process flow according to an embodiment of the utility model.
The attached drawings are used for identifying and describing:
1. expander 2, generator
3. Preheater 4 and temperature re-setting device
5. Electrolytic tank 6, hydrogen separator
7. Oxygen separator 8 and hydrogen purification device
9. Oxygen purification device 10 and hydrogen storage tank
11. Oxygen storage tank 12 and shutoff valve
13. Pressure sensor 14 and electrolyzed water preparation apparatus
15. A first supercharger 16 and a second supercharger.
Detailed Description
Referring to fig. 1 to 2, specific structures of embodiments of the present utility model are shown.
In the description of the present utility model, it should be noted that, for the azimuth words, terms such as "upper", "lower", "front", "rear", "left", "right", etc., indicate azimuth and positional relationships as shown based on the drawings or when worn normally, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the device or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.
A hydrogen production system using differential pressure power generation comprises an expander 1, a generator 2, a preheater 3, a re-heater 4, an electrolytic tank 5, a separator, a purification device, a storage tank, a shutoff valve 12, a pressure sensor 13 and a control device.
The output end of the expander 1 is connected to the input end of the preheater 3 and the input end of the generator 2, respectively, and preferably, the expander 1 is one of a turbine expander, a rotor expander and a screw expander. The input end of the expander 1 is communicated with the output end of a natural gas pipeline. One end output end of the preheater 3 is connected with the temperature re-heater 4; the differential pressure of the pipeline gas drives the expander 1 to drive the generator 2 to generate power, the expanded low-pressure low-temperature gas exchanges heat with the preheater 3, the high-pressure natural gas is depressurized, and the natural gas is heated by the temperature re-heater 4 and then goes to the downstream for natural gas delivery. Part of cold energy of the low-temperature gas after depressurization goes to the hydrogen purification device 8, the re-temperature energy consumption is reduced, the cooled gas after passing through the expander exchanges heat with the preheater 3, the temperature of the cold carrying working medium in the preheater is reduced, the cooled cold carrying working medium is sent to the hydrogen purification device for cooling, and the cold energy after gas expansion is fully utilized.
The temperature re-setting device 4 carries out re-setting through the heat pump unit, and has high efficiency. Because the pressure of the upstream natural gas in the natural gas conveying pipeline is usually about 10MPa, the natural gas pressure output by the downstream natural gas is usually about 4MPa, the input end of the expander 1 is connected to the output end of the natural gas conveying pipeline (referred to as the output end of the upstream natural gas), and one output end of the expander 1 goes downstream through the preheater 3 and the temperature re-heater 4 in sequence, and the conveying pipeline can continue to convey the natural gas while hydrogen production is performed by differential pressure power generation.
The output end of the other end of the preheater 3 is connected with a purifying device; the output end of the generator 2 is connected with the input end of the electrolytic tank 5; one end of the electrolytic tank 5 is connected with an electrolyzed water forming apparatus 14.
The separator comprises a hydrogen separator 6 and an oxygen separator 7, the output ends of the electrolytic tank 5 are respectively connected with the hydrogen separator 6 and the oxygen separator 7, the output ends of the hydrogen separator 6 and the oxygen separator 7 are respectively connected with the input end of the purifying device, the shutoff valve 12 is arranged between the output end of the hydrogen separator 6 and the input end of the purifying device, the pressure sensor 13 is arranged between the output end of the hydrogen separator 6 and the on-off valve, the output end of the purifying device is connected with the input end of the storage tank, preferably, the purifying device comprises a hydrogen purifying device 8 and an oxygen purifying device 9, the output end of the hydrogen separator 6 is connected with the input end of the hydrogen purifying device 8, and the output end of the oxygen separator 7 is connected with the input end of the oxygen purifying device 9.
The control device is electrically connected to the shut-off valve 12 and the pressure sensor 13, respectively. The natural gas differential pressure complementary energy is utilized to drive the expander 1 to do work, so as to drive the generator 2 to generate electricity, output electricity is used as a power source to be supplied to the electrolytic tank 5 for electrolyzing water, hydrogen and oxygen are generated after electrolysis, and the generated hydrogen and oxygen enter the hydrogen separator 6 and the oxygen separator 7 respectively and are separated through the physical characteristics of the self weight of gas and liquid. Wherein the vessel size of the oxygen separator 7 is not larger than half the vessel size of the hydrogen separator 6, so that by reducing the vessel size of the oxygen separator 7, the problem that the oxygen pressure is not lower than the hydrogen pressure without any control adjustment under the condition of holding pressure at the same time is solved, and by combining the characteristic, the oxygen separator 7 adopts the vessel size smaller than (or equal to) half the vessel size of the hydrogen separator 6, thereby meeting the control and saving the cost at the same time.
Preferably, the shutoff valve 12 is disposed between the output end of the hydrogen separator 6 and the input end of the hydrogen purification device 8, the storage tank includes a hydrogen storage tank 10 and an oxygen storage tank 11, the output end of the hydrogen purification device 8 is connected to the hydrogen storage tank 10, and the output end of the oxygen separator 7 is connected to the oxygen storage tank 11. Preferably, a first booster 15 and a second booster 16 are also connected to one end of the hydrogen storage tank 10 and the oxygen storage tank 11, respectively. The first booster 15 boosts the hydrogen gas, filters and washes the hydrogen gas to remove salts and impurities in the gas, and then fills and sends the hydrogen gas. The second booster 16 is arranged behind the oxygen storage tank to boost oxygen, and then the oxygen is filtered, washed with water, and filled and sent out after salt and impurities in the gas are removed.
The utility model mainly adopts the structural design and cooperation of an expander, a generator, a preheater, a temperature re-setting device, an electrolytic tank, a separator, a purifying device, a storage tank, an on-off valve, a pressure sensor and a control device, and utilizes differential pressure residual energy to generate electricity and prepare hydrogen and mix the hydrogen into a natural gas pipeline for transportation, thereby saving energy.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model are still within the scope of the technical solutions of the present utility model.
Claims (6)
1. A hydrogen production system by utilizing differential pressure power generation is characterized in that: comprises an expander, a generator, a preheater, a re-heater, an electrolytic tank, a separator, a purifying device, a storage tank, a break valve, a pressure sensor and a control device;
the output end of the expansion machine is respectively connected with the input end of the preheater and the input end of the generator, and one end output end of the preheater is connected with the temperature re-setting device; the output end of the other end of the preheater is connected with a purifying device; the output end of the generator is connected with the input end of the electrolytic tank;
the separator comprises a hydrogen separator and an oxygen separator, the output ends of the electrolytic tank are respectively connected with the hydrogen separator and the oxygen separator, the output ends of the hydrogen separator and the oxygen separator are respectively connected with the input end of the purifying device, the turn-off valve is arranged between the output end of the hydrogen separator and the input end of the purifying device, the pressure sensor is arranged between the output end of the hydrogen separator and the on-off valve, the output end of the purifying device is connected with the input end of the storage tank, and the control device is respectively electrically connected with the turn-off valve and the pressure sensor.
2. A hydrogen generation system utilizing differential pressure as defined in claim 1, wherein: the purification device comprises a hydrogen purification device and an oxygen purification device, wherein the output end of the hydrogen separator is connected with the input end of the hydrogen purification device, and the output end of the oxygen separator is connected with the input end of the oxygen purification device.
3. A hydrogen generation system utilizing differential pressure as defined in claim 2, wherein: the shutoff valve is arranged between the output end of the hydrogen separator and the input end of the hydrogen purification device.
4. A hydrogen generation system utilizing differential pressure as defined in claim 2, wherein: the storage tank comprises a hydrogen storage tank and an oxygen storage tank, the output end of the hydrogen purification device is connected to the hydrogen storage tank, and the output end of the oxygen separator is connected to the oxygen storage tank.
5. A system for producing hydrogen using differential pressure power generation as defined in claim 4 wherein: and one ends of the hydrogen storage tank and the oxygen storage tank are also respectively connected with a first supercharger and a second supercharger.
6. A hydrogen generation system utilizing differential pressure as defined in claim 1, wherein: the expander is one of a turbine expander, a rotor expander and a screw expander.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321619931.0U CN220285823U (en) | 2023-06-25 | 2023-06-25 | System for generating hydrogen by utilizing differential pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321619931.0U CN220285823U (en) | 2023-06-25 | 2023-06-25 | System for generating hydrogen by utilizing differential pressure |
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| Publication Number | Publication Date |
|---|---|
| CN220285823U true CN220285823U (en) | 2024-01-02 |
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|---|---|---|---|
| CN202321619931.0U Active CN220285823U (en) | 2023-06-25 | 2023-06-25 | System for generating hydrogen by utilizing differential pressure |
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| Country | Link |
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| CN (1) | CN220285823U (en) |
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- 2023-06-25 CN CN202321619931.0U patent/CN220285823U/en active Active
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