CN114754286A - Hydrogenation station is with compound compression system - Google Patents
Hydrogenation station is with compound compression system Download PDFInfo
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- CN114754286A CN114754286A CN202110023848.6A CN202110023848A CN114754286A CN 114754286 A CN114754286 A CN 114754286A CN 202110023848 A CN202110023848 A CN 202110023848A CN 114754286 A CN114754286 A CN 114754286A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
- F17C2227/0164—Compressors with specified compressor type, e.g. piston or impulsive type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0171—Arrangement
- F17C2227/0185—Arrangement comprising several pumps or compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/04—Methods for emptying or filling
- F17C2227/046—Methods for emptying or filling by even emptying or filling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
本发明提供一种加氢站用复合压缩系统，其包括依次连接的氢气源、复合压缩系统、高压储氢罐以及加氢机，所述复合压缩系统包括并联或串联的隔膜压缩机和活塞压缩机。本发明主要由一台隔膜压缩机和一台活塞式压缩机组成的复合压缩系统，需要启动压缩系统时，活塞压缩机启动快可以直接从氢源取气，储存于高压储氢罐；隔膜压缩机和活塞压缩机并联从氢气源取气时，能够满足最大排气量的需求；氢气源的压力比较小时，隔膜压缩机和活塞压缩机串联能够提高氢气排量；某一个压缩机运维时，另一个压缩机可以单独正常工作，使加氢站不停运；在加注低谷或夜间给高压储氢罐压缩氢气时，可以根据压缩机组合的效率，选用高效率的组合形式，以降低压缩耗能。
The invention provides a composite compression system for a hydrogenation station, which includes a hydrogen source, a composite compression system, a high-pressure hydrogen storage tank and a hydrogenation machine connected in sequence, and the composite compression system includes a parallel or series connection of a diaphragm compressor and a piston compressor machine. The invention mainly consists of a composite compression system composed of a diaphragm compressor and a piston compressor. When the compression system needs to be started, the piston compressor can start quickly and can directly take gas from the hydrogen source and store it in a high-pressure hydrogen storage tank; When the compressor and the piston compressor are connected in parallel to take gas from the hydrogen source, it can meet the demand for the maximum displacement; the pressure of the hydrogen source is relatively small, the diaphragm compressor and the piston compressor can be connected in series to increase the hydrogen displacement; when a certain compressor is operated and maintained , the other compressor can work normally alone, so that the hydrogen refueling station will not run; when filling the trough or compressing hydrogen to the high-pressure hydrogen storage tank at night, you can choose a high-efficiency combination according to the efficiency of the compressor combination to reduce the Compression power consumption.
Description
Technical Field
The invention relates to the technical field of hydrogenation stations, in particular to a composite compression system of a hydrogenation station.
Background
The hydrogen energy is used as a sustainable energy source, can provide reliable, clean and low-cost electric power, and is the key of sustainable development of industries such as transportation, industrial manufacturing and the like. Hydrogen energy can bring huge benefits to energy, economy and environment, so that hydrogen energy economy is a necessary solution for successful energy conversion. As a necessary link for hydrogen energy supply, hydrogen energy storage and transportation are concerned.
In a typical hydrogen station, as shown in fig. 1, only one large-flow diaphragm compressor 2 'is usually configured, the diaphragm compressor 2' sucks hydrogen in a hydrogen source 1 'and stores the hydrogen in a high-pressure hydrogen storage tank 3', and the hydrogen is filled by a hydrogen filling machine 4 'according to a pressure difference between the high-pressure hydrogen storage tank 3' and a vehicle-mounted hydrogen storage bottle (not shown in the figure). When the pressure of the high-pressure hydrogen storage tank 3 'reaches the rated pressure, the diaphragm compressor 2' stops operating. When a vehicle needs hydrogenation, the hydrogenation machine 4 'utilizes the pressure difference to fill the hydrogen in the high-pressure hydrogen storage tank 3' into the vehicle-mounted hydrogen storage bottle through certain control logic. The hydrogen station control system monitors the hydrogen pressure in the high-pressure hydrogen storage tank, when the hydrogen pressure in the high-pressure hydrogen storage tank 3 'is lower than a certain set value, the diaphragm compressor 2' is started to absorb the hydrogen in the hydrogen source 1 'to pressurize the high-pressure hydrogen storage tank 3', the purpose of supplementing the high-pressure hydrogen is further achieved, and the process is repeated until the high-pressure hydrogen storage tank reaches a set pressure value. However, the diaphragm compressor of the hydrogen station with a single compressor is slow in starting process, long in time consumption, small in air displacement when the hydrogen source pressure is low, and incapable of pressurizing the high-pressure hydrogen storage tank when the diaphragm compressor needs to be maintained, and even risks that the operation of the hydrogen station is stopped can occur.
In order to solve the technical defects, the invention provides a composite compression system for a hydrogenation station.
Disclosure of Invention
The invention aims to provide a composite compression system for a hydrogen filling station, which can be quickly started, has small displacement when the pressure of a hydrogen source is low, and can pressurize a high-pressure hydrogen storage tank when a diaphragm compressor needs to be maintained, so that the risk of stopping the operation of the hydrogen filling station is avoided.
In order to achieve the purpose, the invention provides a composite compression system for a hydrogenation station, which comprises a hydrogen source, the composite compression system and a high-pressure hydrogen storage tank which are sequentially connected, wherein the composite compression system comprises a diaphragm compressor and a piston compressor which are connected in parallel or in series.
The composite compression system for the hydrogenation station is characterized in that when the diaphragm compressor and the piston compressor are connected in parallel, a first electromagnetic valve is arranged on the upstream of the diaphragm compressor, a second electromagnetic valve is arranged on the downstream of the diaphragm compressor, and a third electromagnetic valve is arranged on the upstream of the piston compressor.
The composite compression system for the hydrogenation station is characterized in that when the diaphragm compressor and the piston compressor are connected in series, a buffer tank is arranged between the diaphragm compressor and the piston compressor, a first electromagnetic valve is arranged at the upstream of the diaphragm compressor, a second electromagnetic valve is arranged between the diaphragm compressor and the buffer tank, and a third electromagnetic valve is arranged between the buffer tank and the piston compressor.
The composite compression system for the hydrogenation station further comprises a safety valve, wherein one end of a pipeline where the safety valve is located is communicated with a pipeline between the hydrogen source and the first electromagnetic valve, and the other end of the pipeline where the safety valve is located is communicated with a pipeline between the buffer tank and the third electromagnetic valve.
The composite compression system for the hydrogenation station further comprises a fourth electromagnetic valve and a fifth electromagnetic valve, wherein one end of a pipeline where the fourth electromagnetic valve is located is communicated with a pipeline between the diaphragm compressor and the second electromagnetic valve, and the other end of the pipeline where the fourth electromagnetic valve is located is communicated with a pipeline between the piston compressor and the high-pressure hydrogen storage tank; one end of the pipeline where the fifth electromagnetic valve is located is communicated with the pipeline between the hydrogen source and the first electromagnetic valve, and the other end of the pipeline where the fifth electromagnetic valve is located is communicated with the pipeline between the third electromagnetic valve and the piston compressor.
The composite compression system for the hydrogenation station is characterized in that only the diaphragm compressor works when the first electromagnetic valve and the fourth electromagnetic valve are opened and the second electromagnetic valve, the third electromagnetic valve and the fifth electromagnetic valve are closed.
The composite compression system for the hydrogenation station is characterized in that only the piston compressor works when the fifth electromagnetic valve is opened and the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are closed.
The composite compression system for the hydrogenation station is characterized in that when the fourth electromagnetic valve and the fifth electromagnetic valve are closed and the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are opened, the diaphragm compressor and the piston compressor work in series.
The composite compression system for the hydrogenation station is characterized in that when the first electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve are opened and the second electromagnetic valve and the third electromagnetic valve are closed, the diaphragm compressor and the piston compressor work in parallel.
The invention also provides a composite compression system for the hydrogenation station, which comprises a group of hydrogen source, diaphragm compressor and high-pressure hydrogen storage tank which are connected in sequence, and another group of hydrogen source, piston compressor and high-pressure hydrogen storage tank which are connected in sequence.
The invention has the beneficial effects that:
1. the composite compression system mainly comprises a diaphragm compressor and a piston compressor, the rated discharge capacities of the two compressors are approximately equal and are half of that of a large-flow diaphragm compressor, so that the maximum discharge capacity is not lower than that of the large-flow diaphragm compressor, the problems of low hydrogen source pressure, small discharge capacity, no compressor for operation and maintenance can be effectively solved, and the composite compression system has the advantages of being fast in starting and high in compression efficiency.
2. When the compression system needs to be started, the piston compressor can be started quickly, gas can be directly taken from a hydrogen source and stored in the high-pressure hydrogen storage tank; when the diaphragm compressor and the piston compressor are connected in parallel to take gas from the hydrogen source, the requirement of the maximum gas displacement can be met; when the pressure of the hydrogen source is smaller, the diaphragm compressor and the piston compressor are connected in series to improve the hydrogen discharge capacity; when one compressor is in operation and maintenance, the other compressor can work independently and normally, so that the hydrogenation station is not stopped; when the low ebb or night is filled to compress hydrogen for the high-pressure hydrogen storage tank, a high-efficiency combination form can be selected according to the combination efficiency of the compressors so as to reduce the compression energy consumption.
3. The safety valve is used for preventing the inlet pressure of the piston compressor from being overhigh when the diaphragm compressor and the piston compressor are used in series.
Drawings
FIG. 1 is a schematic diagram of a prior art compression system of a hydrogen refueling station;
FIG. 2 is a schematic view of a first embodiment of a compound compression system for a hydrogen refueling station in accordance with the present invention;
FIG. 3 is a schematic view of a second embodiment of a compound compression system for a hydrogen refueling station in accordance with the present invention;
FIG. 4 is a schematic view of a third embodiment of a compound compression system for a hydrogen refueling station in accordance with the present invention;
fig. 5 is a schematic view of a fourth embodiment of a compound compression system for a hydrogen refueling station according to the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
First embodiment
First, as shown in fig. 2, the present invention provides a combined compression system for a hydrogen refueling station, which mainly comprises: a hydrogen source 1, a composite compression system 2, a high-pressure hydrogen storage tank 3 and a hydrogenation machine 4. The hydrogen source 1, the composite compression system 2, the high-pressure hydrogen storage tank 3 and the hydrogenation machine 4 are sequentially connected, the composite compression system 2 comprises a diaphragm compressor 21 and a piston compressor 22 which are connected in parallel, in a parallel pipeline of the composite compression system 2, a first electromagnetic valve 51 is arranged on the upstream of the diaphragm compressor 21, a second electromagnetic valve 52 is arranged on the downstream of the diaphragm compressor 21, and a third electromagnetic valve 53 is arranged on the upstream of the piston compressor 22.
The piston compressor adopted in the first embodiment has the advantages of being fast in starting, wide in applicable pressure range, high in compression efficiency, strong in adaptability and the like, and can be started preferentially under the condition that the diaphragm compressor cannot be started timely, so that the reaction time of the compression system is prolonged.
The working principle of the first embodiment is: during operation, the composite compression system 2 extracts hydrogen from the hydrogen source 1, compresses the hydrogen, stores the compressed hydrogen in the high-pressure hydrogen storage tank 3, and when the pressure of the high-pressure hydrogen storage tank 3 reaches a rated pressure, the diaphragm compressor 21 and the piston compressor 22 in the composite compression system 2 stop operating, that is, the first electromagnetic valve 51, the second electromagnetic valve 52 and the third electromagnetic valve 53 are all closed. When a vehicle needs hydrogenation, the hydrogenation machine 4 injects hydrogen in the high-pressure hydrogen storage tank 3 into the vehicle-mounted hydrogen storage bottle by using pressure difference through certain control logic, and the hydrogenation station control system monitors the pressure of the hydrogen in the high-pressure hydrogen storage tank 3. When the pressure in the high-pressure hydrogen storage tank is lower than the set value, the diaphragm compressor 21 (the first electromagnetic valve 51 and the second electromagnetic valve 52 are opened, and the third electromagnetic valve 53 is closed) and/or the piston compressor 22 (the first electromagnetic valve 51 and the second electromagnetic valve 52 are closed, and the third electromagnetic valve 53 is opened) in the compound compression system 2 are started to work until the high-pressure hydrogen storage tank 3 reaches the set pressure value, and the process is repeated.
In this embodiment, the diaphragm compressor 21 and the piston compressor 22 are used in parallel, and when the composite compression system 2 is started, the piston compressor 22 is started quickly, so that hydrogen can be discharged quickly, the reaction time of the compression system is prolonged, and the risk of shutdown of a hydrogenation station during maintenance of a single compressor is effectively avoided. After the diaphragm compressor 21 is started, the requirement of the maximum discharge capacity of hydrogen can be met.
Second embodiment
As shown in fig. 3, the present invention provides a combined compression system for a hydrogen refueling station, which mainly comprises: the hydrogen production system comprises two groups of hydrogen sources 1, a composite compression system 2, a high-pressure hydrogen storage tank 3 and a hydrogenation machine 4, wherein the composite compression system 2 comprises a diaphragm compressor 21 and a piston compressor 22. Wherein, in the first group, the hydrogen source 1, the diaphragm compressor 21, the high-pressure hydrogen storage tank 3 and the hydrogenation machine 4 are connected in sequence; in the second group, the hydrogen source 1, the piston compressor 22, the high-pressure hydrogen storage tank 3 and the hydrogenation machine 4 are connected in sequence. A first electromagnetic valve 51 is arranged upstream of the diaphragm compressor 21, and a second electromagnetic valve 52 is arranged downstream of the diaphragm compressor 21. A third solenoid valve 53 is provided upstream of the piston compressor 22.
The working principle of the second embodiment is: when the composite compression system works, the diaphragm compressor 21 or the piston compressor 22 in the composite compression system 2 extracts hydrogen in the hydrogen source 1, stores the hydrogen in the corresponding high-pressure hydrogen storage tank 3 after compression, and stops working when the pressure of the high-pressure hydrogen storage tank 3 reaches the rated pressure. When a vehicle needs hydrogenation, the hydrogenation machine 4 injects hydrogen in the high-pressure hydrogen storage tank 3 into the vehicle-mounted hydrogen storage bottle by using pressure difference through certain control logic, and the hydrogenation station control system monitors the pressure of the hydrogen in the high-pressure hydrogen storage tank 3. When the pressure in the high-pressure hydrogen storage tank is lower than the set value, the diaphragm compressor 21 (the first electromagnetic valve 51 and the second electromagnetic valve 52 are opened, and the third electromagnetic valve is closed 53) and/or the piston compressor 22 (the first electromagnetic valve 51 and the second electromagnetic valve 52 are closed, and the third electromagnetic valve is opened 53) in the compound compression system 2 are started to work until the high-pressure hydrogen storage tank 3 reaches the set pressure value, and the process is repeated.
Since two sets of compression systems are shared in the second embodiment, when one of the diaphragm compressor 21 and the piston compressor 22 is maintained or repaired, the other of the diaphragm compressor 21 and the piston compressor 22 can normally operate, and the risk of shutdown of the hydrogen station during maintenance of the single compressor is effectively avoided.
Third embodiment
As shown in fig. 4, the present invention provides a combined compression system for a hydrogen refueling station, which mainly comprises: hydrogen source 1, compound compression system 2, high-pressure hydrogen storage tank 3, hydrogenation machine 4, buffer tank 6 and relief valve 7. Wherein, hydrogen source 1, compound compression system 2, high-pressure hydrogen storage tank 3 and hydrogenation machine 4 connect gradually, compound compression system 2 includes diaphragm compressor 21 and the piston compressor 22 of establishing ties, and buffer tank 6 sets up between diaphragm compressor 21 and the piston compressor 22. In the serial pipeline of the compound compression system 2, a first electromagnetic valve 51 is arranged upstream of the diaphragm compressor 21, a second electromagnetic valve 52 is arranged between the diaphragm compressor 21 and the buffer tank 6, and a third electromagnetic valve 53 is arranged between the buffer tank 6 and the piston compressor 22. Further, one end of the pipe line in which the safety valve 7 is located communicates with the pipe line between the hydrogen gas source 1 and the first electromagnetic valve 51, and the other end of the pipe line in which the safety valve 7 is located communicates with the pipe line between the buffer tank 6 and the third electromagnetic valve 53, the safety valve 7 being for preventing the inlet pressure of the reciprocating compressor 22 from being excessively high.
The working principle of the third embodiment is as follows: the first electromagnetic valve 51, the second electromagnetic valve 52 and the third electromagnetic valve 53 are all opened, when the hydrogen pressure of the hydrogen source 1 is low, the diaphragm compressor 21 sucks hydrogen, the hydrogen is stored in the buffer tank 6 of the compound compression system after being pressurized, the piston compressor 22 sucks hydrogen with high pressure, and at the moment, the third pressurized hydrogen is stored in the high-pressure hydrogen storage tank 3 and is used by the hydrogenation machine 4.
In this embodiment, the diaphragm compressor 21 and the piston compressor 22 are used in series, so that the hydrogen discharge amount of the composite compression system of the hydrogen station is increased, the compression efficiency is improved, and the risk of shutdown of the hydrogen station during maintenance of a single compressor is effectively avoided.
Fourth embodiment
As shown in fig. 5, the fourth embodiment is different from the third embodiment in that a fourth solenoid valve 54 and a fifth solenoid valve 55 are added. Wherein one end of the pipeline in which the fourth electromagnetic valve 54 is located communicates with the pipeline between the diaphragm compressor 21 and the second electromagnetic valve 52, and the other end of the pipeline is located communicates with the pipeline between the piston compressor 22 and the high-pressure hydrogen tank 3. One end of the pipeline in which the fifth electromagnetic valve 55 is located is communicated with the pipeline between the hydrogen source 1 and the first electromagnetic valve 51, and the other end of the pipeline in which the fifth electromagnetic valve 55 is located is communicated with the pipeline between the third electromagnetic valve 53 and the piston compressor 22.
The diaphragm compressor 21 and the piston compressor 22 in this embodiment may employ different modes of operation, such as a series mode, a parallel mode, and a single compressor mode of operation.
The working principle of the fourth embodiment is:
when the operation is performed only with the diaphragm compressor 21, the first solenoid valve 51 and the fourth solenoid valve 54 are opened, and the second solenoid valve 52, the third solenoid valve 53, and the fifth solenoid valve 55 are closed. At this time, the hydrogen gas supplied from the hydrogen source 1 is supplied to the diaphragm compressor 21 to be pressurized, and then the high-pressure hydrogen storage tank 3 is supplied, and the hydrogen machine 4 fills the hydrogen gas in the high-pressure hydrogen storage tank 3 into the vehicle-mounted hydrogen storage cylinder by using a pressure difference through a certain control logic.
When the operation is performed only with the reciprocating compressor 22, the fifth solenoid valve 55 is opened, and the first solenoid valve 51, the second solenoid valve 52, the third solenoid valve 53, and the fourth solenoid valve 54 are closed. At this time, the hydrogen gas provided by the hydrogen source 1 is supplied to the piston compressor 22 to be pressurized, and then the high-pressure hydrogen storage tank 3 is provided, and the hydrogen machine 4 fills the hydrogen gas in the high-pressure hydrogen storage tank 3 into the vehicle-mounted hydrogen storage cylinder by using a pressure difference through a certain control logic.
When the diaphragm compressor 21 and the piston compressor 22 are used to work in series, the fourth solenoid valve 54 and the fifth solenoid valve 55 are closed, and the first solenoid valve 51, the second solenoid valve 52 and the third solenoid valve 53 are opened, and the working modes thereof are completely the same as those of the third embodiment, and are not described herein again.
When the diaphragm compressor 21 and the piston compressor 22 are operated in parallel, the first solenoid valve 51, the fourth solenoid valve 54 and the fifth solenoid valve 55 are opened, and the second solenoid valve 52 and the third solenoid valve 53 are closed, and the operation mode is completely the same as that of the first embodiment, which is not described herein again.
In this embodiment, when the hydrogen station is in a low-ebb or night and needs to pressurize hydrogen for the high-pressure hydrogen storage tank, the most matched compression efficiency can be optimized and selected for hydrogen pressurization according to the tested compression efficiency of a single compressor (a diaphragm compressor or a piston compressor), the efficiency of two compressors in series connection and the efficiency of two compressors in parallel connection, so that the compression system of the hydrogen station is in a high-efficiency compression mode (the compressors in series connection, the compressors in parallel connection and the single compressor), the compression energy consumption of the hydrogen station is reduced, and the hydrogen economy of the hydrogen station is improved.
In conclusion, the beneficial effects of the invention are as follows:
1. the composite compression system mainly comprises a diaphragm compressor and a piston compressor, the rated discharge capacities of the two compressors are approximately equal and are half of that of a large-flow diaphragm compressor, so that the maximum discharge capacity is not lower than that of the large-flow diaphragm compressor, the problems of low hydrogen source pressure, small discharge capacity, no compressor for operation and maintenance can be effectively solved, and the composite compression system has the advantages of being fast in starting and high in compression efficiency.
2. When the compression system needs to be started, the piston compressor can be started quickly, gas can be directly taken from a hydrogen source and stored in the high-pressure hydrogen storage tank; when the diaphragm compressor and the piston compressor are connected in parallel to take gas from the hydrogen source, the requirement of the maximum gas displacement can be met; when the pressure of the hydrogen source is smaller, the diaphragm compressor and the piston compressor are connected in series to improve the hydrogen discharge capacity; when one compressor is in operation and maintenance, the other compressor can work independently and normally, so that the hydrogenation station is not stopped; when the low ebb or night is filled to compress hydrogen for the high-pressure hydrogen storage tank, a high-efficiency combination form can be selected according to the combination efficiency of the compressors so as to reduce the compression energy consumption.
3. The safety valve is used for preventing the inlet pressure of the piston compressor from being overhigh when the diaphragm compressor and the piston compressor are used in series.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The composite compression system for the hydrogenation station is characterized by comprising a hydrogen source, a composite compression system and a high-pressure hydrogen storage tank which are sequentially connected, wherein the composite compression system comprises a diaphragm compressor and a piston compressor which are connected in parallel or in series.
2. The compound compression system for a hydrogenation station of claim 1, wherein when the diaphragm compressor and the piston compressor are connected in parallel, a first solenoid valve is disposed upstream of the diaphragm compressor, a second solenoid valve is disposed downstream of the diaphragm compressor, and a third solenoid valve is disposed upstream of the piston compressor.
3. The composite compression system for the hydrogenation station as claimed in claim 1, wherein when the diaphragm compressor and the piston compressor are connected in series, a buffer tank is disposed between the diaphragm compressor and the piston compressor, a first solenoid valve is disposed upstream of the diaphragm compressor, a second solenoid valve is disposed between the diaphragm compressor and the buffer tank, and a third solenoid valve is disposed between the buffer tank and the piston compressor.
4. The compound compression system for a hydrogen refueling station as recited in claim 3, further comprising a safety valve, wherein one end of the pipeline in which the safety valve is located communicates with the pipeline between the hydrogen gas source and the first solenoid valve, and the other end of the pipeline in which the safety valve is located communicates with the pipeline between the buffer tank and the third solenoid valve.
5. The composite compression system for the hydrogen filling station according to claim 3, further comprising a fourth electromagnetic valve and a fifth electromagnetic valve, wherein one end of the pipeline in which the fourth electromagnetic valve is located is communicated with the pipeline between the diaphragm compressor and the second electromagnetic valve, and the other end of the pipeline in which the fourth electromagnetic valve is located is communicated with the pipeline between the piston compressor and the high-pressure hydrogen storage tank; one end of the pipeline where the fifth electromagnetic valve is located is communicated with the pipeline between the hydrogen source and the first electromagnetic valve, and the other end of the pipeline where the fifth electromagnetic valve is located is communicated with the pipeline between the third electromagnetic valve and the piston compressor.
6. The compound compression system for a hydrogenation station of claim 5, wherein only the diaphragm compressor operates when the first solenoid valve and the fourth solenoid valve are opened and the second solenoid valve, the third solenoid valve and the fifth solenoid valve are closed.
7. The composite compression system for a hydrogenation station of claim 5, wherein only the piston compressor operates when the fifth solenoid valve is opened and the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are closed.
8. The compound compression system for a hydrogenation station of claim 5, wherein the diaphragm compressor and the piston compressor are operated in series when the fourth solenoid valve and the fifth solenoid valve are closed and the first solenoid valve, the second solenoid valve and the third solenoid valve are opened.
9. The compound compression system for a hydrogen station as claimed in claim 5, wherein the diaphragm compressor and the piston compressor are operated in parallel when the first solenoid valve, the fourth solenoid valve and the fifth solenoid valve are opened and the second solenoid valve and the third solenoid valve are closed.
10. A composite compression system for a hydrogenation station is characterized by comprising a group of hydrogen source, a diaphragm compressor and a high-pressure hydrogen storage tank which are sequentially connected, and another group of hydrogen source, a piston compressor and a high-pressure hydrogen storage tank which are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Application publication date: 20220715 |