CN113586952A - Automatic gas discharging system and method for hydrogenation station - Google Patents
Automatic gas discharging system and method for hydrogenation station Download PDFInfo
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- CN113586952A CN113586952A CN202110843565.6A CN202110843565A CN113586952A CN 113586952 A CN113586952 A CN 113586952A CN 202110843565 A CN202110843565 A CN 202110843565A CN 113586952 A CN113586952 A CN 113586952A
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- 238000007599 discharging Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 208
- 238000010926 purge Methods 0.000 claims abstract description 43
- 239000011261 inert gas Substances 0.000 claims abstract description 13
- 230000000740 bleeding effect Effects 0.000 claims abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 27
- 239000001257 hydrogen Substances 0.000 claims description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims description 27
- 238000013461 design Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 25
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 238000010408 sweeping Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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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
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- 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
- Y02E60/34—Hydrogen distribution
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pipeline Systems (AREA)
Abstract
The invention provides an automatic gas discharging system and method for a hydrogenation station, wherein a second connecting pipeline and a third connecting pipeline are respectively connected between two gas discharging pipelines, the third connecting pipeline is connected with a bleeding pipe, the two gas discharging pipelines are respectively connected with a second stop valve, and the gas discharging pipelines are connected with a pressure transmitter; the two ends of the purging pipeline are respectively connected with the second connecting pipeline and the third connecting pipeline, the purging pipeline is connected with a fifth cut-off valve, the high-pressure inert gas source is connected with the purging pipeline through a gas guide pipeline, and the gas guide pipeline is connected with a sixth cut-off valve; the second connecting pipeline is connected with two third stop valves, and the third connecting pipeline is connected with two fourth stop valves. The technical scheme provided by the invention has the beneficial effects that: the double-gas-discharging system design is adopted, the operation convenience and operation safety of operators are improved, the overall pipeline layout is clear in major and minor, the flow is clear, the primary and secondary pipelines are layered and easy to identify, the operation accuracy can be effectively improved, the misoperation is reduced, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of hydrogenation stations, in particular to an automatic gas discharging system and method for a hydrogenation station.
Background
The existing gas unloading method on the hydrogen station is to unload gas by using a single system of a gas unloading column, and compressed hydrogen of a hydrogen long pipe trailer passes through a gas inlet breaking valve, a hand valve, a pipeline pressure transmitter, a one-way valve and a filter again after being connected by a pipeline.
The air discharging system is a single system flow consisting of a clamping sleeve joint, a high-pressure hose, a breaking valve, a manual ball valve, a filter, a flowmeter, a root ball valve and the like. The system has a complex structure, is manually operated, has high failure rate and is inconvenient to operate and maintain; when the air discharge operation is carried out, the related keys are required to be operated on the operation panel, the manual valve is opened to discharge air, and the flowmeter is used for metering. However, in many cases, the metering is not required in the gas discharge area, but is based on the pressure of the gas source or adopts other metering modes; meanwhile, in order to save cost, a purging system is not replaced, so that the design is unreasonable, and the use, operation and maintenance are inconvenient. In addition, the common hydrogen gas discharging cabinet adopts a single system flow, so that the functions of simultaneously supplying gas by two gas sources and using the gas one by one cannot be met, and the system is single and cannot meet the actual use requirement; since the hydrogen pressure is higher than the nitrogen pressure, there is a risk of hydrogen cross-over into the nitrogen line if the check valve fails.
Disclosure of Invention
In view of the above, embodiments of the present invention provide an automatic gas discharging system and method for a hydrogen refueling station.
The embodiment of the invention provides an automatic gas discharging system for a hydrogenation station, which comprises two gas discharging pipelines and a purging pipeline;
the air inlet ends of the two air discharging pipelines are respectively connected with the long pipe trailer through a first cut-off valve, the air outlet ends are connected through a first connecting pipeline and then used for being connected with a compressor, a second connecting pipeline and a third connecting pipeline are respectively connected between the two air discharging pipelines, the connecting positions of the second connecting pipeline and the two air discharging pipelines are respectively positioned between the first connecting pipeline and the first cut-off valve, and the connecting positions of the third connecting pipeline and the two air discharging pipelines are respectively positioned between the second connecting pipeline and the first connecting pipeline; the two gas discharging pipelines are respectively connected with a second cut-off valve, the second cut-off valve is positioned between the first connecting pipeline and the third connecting pipeline, and the gas discharging pipeline positioned between the second connecting pipeline and the third connecting pipeline is connected with a pressure transmitter;
the two ends of the purging pipeline are respectively connected with the second connecting pipeline and the third connecting pipeline, the purging pipeline is connected with a fifth cut-off valve, the high-pressure inert gas source is connected with the purging pipeline through a gas guide pipeline, the joint of the gas guide pipeline and the purging pipeline is positioned between the fifth cut-off valve and the second connecting pipeline, and the gas guide pipeline is connected with a sixth cut-off valve; the second connecting pipeline is connected with two third stop valves, the two third stop valves are respectively positioned on two sides of the purging pipeline, the third connecting pipeline is connected with two fourth stop valves, the two fourth stop valves are respectively positioned on two sides of the purging pipeline, and the third connecting pipeline between the two fourth stop valves is connected with the bleeding pipe.
Furthermore, a first one-way valve is connected to the air discharge pipeline and located between the second connecting pipeline and the third connecting pipeline.
Furthermore, the second connecting pipeline is connected with two second one-way valves, and each second one-way valve is respectively positioned between each gas unloading pipeline and the purging pipeline.
Further, the third shut-off valve is located between the second one-way valve and the gas discharge pipe.
Furthermore, a safety valve is connected to a pipeline connecting the diffusing pipe and the gas discharging pipeline.
Further, the second shut-off valve is an electric valve.
Further, the third cut-off valve is an electric valve.
Further, the fourth cut-off valve is an electric valve.
The embodiment of the invention also provides a gas unloading method, which utilizes the automatic gas unloading system for the hydrogen station, and comprises the following steps:
s1, connecting the air inlet end of the air discharging pipeline with the long tube trailer, closing the valve of the long tube trailer, starting the automatic purging mode, and keeping the first cut-off valve in a normally open state;
s2, opening a fourth cut-off valve, closing the second cut-off valve, the third cut-off valve, the fifth cut-off valve and the sixth cut-off valve, communicating the two gas discharge pipelines with a third connecting pipeline, and closing the fourth cut-off valve after the pressure in the gas discharge system is released to micro-positive pressure;
s3, opening a third cut-off valve and a sixth cut-off valve, detecting the gas pressure in the gas discharge pipeline by using a pressure transmitter, closing the third cut-off valve and the sixth cut-off valve when the pressure transmitter detects that the pressure in the gas discharge pipeline is balanced within a first preset range, and cutting off a high-pressure inert gas source;
s4, opening a fourth cut-off valve to enable the two gas discharge pipelines to be communicated with a third connecting pipeline, and closing the fourth cut-off valve after the pressure in the gas discharge system is released to micro-positive pressure;
s5 repeating the steps S2-S4 for multiple times, ending the system purging, closing all the shut-off valves, and stopping the automatic purging mode;
s6, opening the valve of the tube trailer, enabling the first cut-off valve and the fifth cut-off valve to be normally opened, closing the second cut-off valve, the third cut-off valve, the fourth cut-off valve and the sixth cut-off valve, and starting an automatic air discharge mode;
s7, when the pressure transmitter detects that the pressure in the gas discharge pipeline is within a second preset range, opening a second cut-off valve to enable the two gas discharge pipelines to be communicated with the first connecting pipeline, and starting to discharge gas automatically;
s8, when the pressure transmitter detects that the pressure in the gas discharge pipeline is out of a second preset range, the second cut-off valve is closed, and automatic gas discharge is stopped.
Further, S6 is followed by:
s9 the two gas discharging pipelines comprise a first gas discharging pipeline and a second gas discharging pipeline, when the pressure transmitter detects that the pressure in the first gas discharging pipeline is within a second preset range, a second stop valve on the first gas discharging pipeline is opened, a fourth stop valve and a third stop valve are closed, the second stop valve, the fourth stop valve and the third stop valve on the second gas discharging pipeline are closed, and the first gas discharging pipeline starts to discharge gas;
s10, when the pressure transmitter detects that the pressure in the first gas discharge pipeline is out of a second preset range and the pressure in the second gas discharge pipeline is in the second preset range, closing a second cut-off valve on the first gas discharge pipeline, opening the second cut-off valve on the second gas discharge pipeline, and starting gas discharge of the second gas discharge pipeline;
s11, when the second gas discharging pipeline discharges gas, the first gas discharging pipeline starts an automatic purging mode, the first cut-off valve on the first gas discharging pipeline is closed, the fourth cut-off valve connected with the first gas discharging pipeline on the third connecting pipeline is opened, and after the pressure in the gas discharging system is released to micro positive pressure, the fourth cut-off valve is closed.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: adopt two gas system designs of unloading, operation personnel's simple operation nature and operational safety have been improved, unload gas pipeline and third connecting tube, the blow-off pipe intercommunication forms the pressure release route, unload gas pipeline and second connecting tube, gas pipeline intercommunication forms the route of sweeping, it forms the route of unloading to unload gas pipeline and first connecting tube intercommunication, whole pipeline layout is clear, the flow is clear, the primary and secondary pipeline (main way hydrogen is unloaded, secondary way nitrogen gas sweeps the replacement) layering and easily discerns, can effectively improve the accuracy of operation, reduce the maloperation, the security is improved. The independent inert gas source is arranged in the gas discharging system and used for automatic purging and replacement, and the condition that the pressure of the instrument nitrogen is suddenly reduced to cause abnormal work of the pneumatic valve when the nitrogen is used for purging a pipeline due to the fact that the inert gas source is mixed with the instrument gas of the whole station is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an automatic gas discharge system for a hydrogen refueling station provided by the present invention.
In the figure: the gas discharging pipeline comprises a gas discharging pipeline 1, a first gas discharging pipeline 1a, a second gas discharging pipeline 1b, a purging pipeline 2, a gas guide pipeline 3, an inert gas source 4, a long-tube trailer 5, a first connecting pipeline 6, a second connecting pipeline 7, a third connecting pipeline 8, a diffusing pipe 9, a pressure transmitter 10, a first cut-off valve 11, a second cut-off valve 12, a third cut-off valve 13, a fourth cut-off valve 14, a fifth cut-off valve 15, a sixth cut-off valve 16, a first one-way valve 17, a second one-way valve 18 and a safety valve 19.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides an automatic gas discharging system for a hydrogen refueling station, which includes two gas discharging pipelines 1 and a purging pipeline 2.
The inlet ends of the two air discharging pipelines 1 are respectively connected with the long-tube trailer 5 through a first cut-off valve 11, in the embodiment, the first cut-off valve 11 is a hand valve, and the outlet ends of the two air discharging pipelines 1 are connected with the compressor after being connected through a first connecting pipeline 6. A second connecting pipeline 7 and a third connecting pipeline 8 are respectively connected between the two gas discharging pipelines 1, the joints of the second connecting pipeline 7 and the two gas discharging pipelines 1 are both positioned between the first connecting pipeline 6 and the first cut-off valve 11, and the joints of the third connecting pipeline 8 and the two gas discharging pipelines 1 are both positioned between the second connecting pipeline 7 and the first connecting pipeline 6; the two gas discharging pipelines 1 are respectively connected with a second stop valve 12, the second stop valves 12 are electric valves, the second stop valves 12 are positioned between the first connecting pipeline 6 and the third connecting pipeline 8, and the gas discharging pipelines 1 positioned between the second connecting pipeline 7 and the third connecting pipeline 8 are connected with pressure transmitters 10; the gas discharging pipeline 1 is connected with a first one-way valve 17, and the first one-way valve 17 is positioned between the second connecting pipeline 7 and the third connecting pipeline 8 to prevent the hydrogen from flowing back.
The both ends of sweeping pipeline 2 are connected with second connecting tube 7, third connecting tube 8 respectively, are connected with fifth trip valve 15 on sweeping pipeline 2, and high pressure inert gas source 4 is connected through air guide pipeline 3 with sweeping pipeline 2, and air guide pipeline 3 is located between fifth trip valve 15 and second connecting tube 7 with the junction of sweeping pipeline 2, is connected with sixth trip valve 16 on the air guide pipeline 3, and in this embodiment, high pressure inert gas source 4 is the nitrogen cylinder, and fifth trip valve 15 and sixth trip valve 16 are the hand valve. Be connected with two third trip valves 13 on the second connecting tube 7, third trip valve 13 is the motorised valve, two third trip valves 13 are located respectively and sweep 2 both sides of pipeline, be connected with two fourth trip valves 14 on the third connecting tube 8, fourth trip valve 14 is the motorised valve, two fourth trip valves 14 are located respectively and sweep 2 both sides of pipeline, third connecting tube 8 that is located between two fourth trip valves 14 is connected with the pipe 9 that diffuses, diffuse pipe 9 with unload gas pipeline 1 and be connected, be connected with relief valve 19 on the pipeline of connection, through opening of relief valve 19, steerable pipeline 1 that unloads is connected between the pipe 9 with diffuse. Two second one-way valves 18 are connected to the second connecting pipeline 7, each second one-way valve 18 is respectively positioned between each gas discharging pipeline 1 and the purging pipeline 2, and the third cut-off valve 13 is positioned between the second one-way valve 18 and the gas discharging pipeline 1.
Based on the automatic gas discharging system for the hydrogen filling station, the embodiment of the invention provides a gas discharging method, which comprises the following steps:
s1, the air inlet end of the air discharging pipeline 1 is connected with the long tube trailer 5, the valve of the long tube trailer 5 is closed, the automatic purging mode is started, and the first cut-off valve 11 is in a normally open state.
S2 opens the fourth cut-off valve 14, closes the second cut-off valve 12, the third cut-off valve 13, the fifth cut-off valve 15 and the sixth cut-off valve 16, and allows the two gas discharge pipes 1 and the third connecting pipe 8 to communicate with each other, and allows the gas in the gas discharge pipes 1 to be discharged from the bleeding pipe 9 through the third connecting pipe 8, and after the pressure in the gas discharge system is released to the slight positive pressure, the fourth cut-off valve 14 is closed.
S3, opening the third cut-off valve 13 and the sixth cut-off valve 16, allowing the high-pressure inert gas of the high-pressure inert gas source 4 to flow into the gas discharge pipeline 1 from the gas guide pipeline 3 through the purging pipeline 2 and the second connecting pipeline 7, detecting the gas pressure in the gas discharge pipeline 1 by using the pressure transmitter 10, and closing the third cut-off valve 13 and the sixth cut-off valve 16 and cutting off the high-pressure inert gas source 4 when the pressure transmitter 10 detects that the pressure in the gas discharge pipeline 1 is balanced within a first preset range, wherein the first preset range is 0.1-0.3 MPa.
S4 opens the fourth cut-off valve 14 to connect the two gas discharge pipes 1 to the third connecting pipe 8, and the gas in the gas discharge pipes 1 can be discharged from the vent pipe 9 through the third connecting pipe 8, and after the pressure in the gas discharge system is released to a slight positive pressure, the fourth cut-off valve 14 is closed.
And S5 repeating the steps S2-S4 for multiple times, ending the system purging, closing all the shut-off valves and stopping the automatic purging mode.
S6 opens the valves of the tube trailer 5 to normally open the first and fifth cut-off valves 11, 15, closes the second, third, fourth and sixth cut-off valves 12, 13, 14, 16, and starts the automatic gas release mode.
S7, when the pressure transmitter 10 detects that the pressure in the gas discharge pipeline 1 is within a second preset range, in the embodiment, the second preset range is 5-20MPa, the second cut-off valve 12 is opened to communicate the two gas discharge pipelines 1 with the first connecting pipeline 6, and automatic gas discharge is started;
s8, when the pressure transmitter 10 detects that the pressure in the gas discharge pipeline 1 is outside the second preset range, namely less than 5MPa or more than 20MPa, the second cut-off valve 12 is closed, and automatic gas discharge is stopped, so that the gas inlet requirement of downstream compressor equipment can be met.
S6 is followed by: s9, the two gas discharge pipelines 1 comprise a first gas discharge pipeline 1a and a second gas discharge pipeline 1b, when the pressure transmitter 10 detects that the pressure in the first gas discharge pipeline 1a is within a second preset range, namely 5-20MPa, a second stop valve 12 on the first gas discharge pipeline 1a is opened, a fourth stop valve 14 and a third stop valve 13 are closed, the second stop valve 12, the fourth stop valve 14 and the third stop valve 13 on the second gas discharge pipeline 1b are closed, and the first gas discharge pipeline 1a starts to discharge gas;
s10, when the pressure transmitter 10 detects that the pressure in the first gas discharging pipeline 1a is outside the second preset range, namely less than 5MPa, the pressure transmitter 10 detects that the pressure in the second gas discharging pipeline 1b is within the second preset range, namely 5-20MPa, the second cut-off valve 12 on the first gas discharging pipeline 1a is closed, the second cut-off valve 12 on the second gas discharging pipeline 1b is opened, the second gas discharging pipeline 1b starts gas discharging, the two gas discharging systems are mutually independent, and share a full-open safety valve, a basket filter (the filtering precision is less than or equal to 5 mu m) and temperature monitoring.
S11 when the second gas discharge pipe 1b discharges gas, the first gas discharge pipe 1a starts the automatic purging mode, the first cut-off valve 11 on the first gas discharge pipe 1a is closed, the fourth cut-off valve 14 connected to the first gas discharge pipe 1a on the third connecting pipe 8 is opened, the first gas discharge pipe 1a is communicated with the third connecting pipe 8 and the bleeding pipe 9, and the fourth cut-off valve 14 is closed after the pressure in the gas discharge system is released to a slight positive pressure. Two gas discharge pipelines 1 can discharge gas simultaneously or discharge gas independently, and when one gas discharge pipeline 1 discharges gas, the other gas discharge pipeline 1 starts an automatic purging mode, so that the gas discharge efficiency is improved.
According to the technical scheme provided by the invention, a double-gas-discharging system design is adopted, so that the operation convenience and the operation safety of operators are improved, the gas discharging pipeline 1 is communicated with the third connecting pipeline 8 and the diffusing pipe 9 to form a pressure relief passage, the gas discharging pipeline 1 is communicated with the second connecting pipeline 7 and the gas guide pipeline 3 to form a purging passage, the gas discharging pipeline 1 is communicated with the first connecting pipeline 6 to form a gas discharging passage, the overall pipeline layout is clear, the flow is clear, the primary and secondary pipelines (main-path hydrogen discharging and secondary-path nitrogen purging replacement) are layered and easy to identify, the operation accuracy can be effectively improved, the misoperation is reduced, and the safety is improved.
The independent nitrogen cylinder is arranged in the gas discharging system and used for automatic purging and replacement, and the condition that the pressure of the instrument nitrogen is suddenly reduced to cause abnormal work of the pneumatic valve when the nitrogen is used for purging a pipeline due to the fact that the nitrogen is mixed with the instrument gas of the whole station is avoided. The gas unloading system also comprises a hydrogen leakage detector for detecting whether hydrogen is leaked in the gas unloading cabinet, and when the system has gas leakage, the hydrogen leakage detector feeds back to the control system to alarm or automatically cuts off the gas source through the control cut-off valve. The gas discharging system has a pipeline self-leakage detection function, and can automatically detect whether the pipeline has micro leakage or not by the central control PLC, so that the inspection intensity of operators is reduced.
The hydrogen pressure transmitter chooses the gilded diaphragm for use, prevents to lead to the transmitter to become invalid because of hydrogen is fragile, unloads and is connected with the filter between pipeline 1 and the long tube trailer 5, and the filter chooses big flux basket filter (filter fineness is 5 mu m) for use, can play the effect of filtering gaseous impurity, guarantees to unload that the pressure differential around the gas system is within 0.5bar, and the diffusion pipe 9 and unload and be connected with the safety valve that opens formula entirely between the pipeline 1, can play the safety protection effect when the system superpressure. The gas discharging pipeline 2 is connected with a fifth stop valve 15, the gas guide pipeline 3 is connected with a sixth stop valve 16, the fifth stop valve 15 and the sixth stop valve 16 form a double-stop discharging valve group, the sixth stop valve 16 is closed when the gas is discharged in normal operation, the fifth stop valve 15 is opened, and hydrogen can be effectively prevented from reversely crossing a nitrogen pipeline due to leakage in a pipe valve part, so that the nitrogen pipeline overpressure risk is caused. All pipe valve parts are integrated in the gas unloading cabinet, and other valves are not arranged on a pipeline between the gas unloading cabinet and the compressor, so that the efficiency of operation maintenance and leakage detection can be greatly improved.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic gas discharging system for a hydrogenation station is characterized by comprising two gas discharging pipelines and a purging pipeline;
the air inlet ends of the two air discharging pipelines are respectively connected with the long pipe trailer through a first cut-off valve, the air outlet ends are connected through a first connecting pipeline and then used for being connected with a compressor, a second connecting pipeline and a third connecting pipeline are respectively connected between the two air discharging pipelines, the connecting positions of the second connecting pipeline and the two air discharging pipelines are respectively positioned between the first connecting pipeline and the first cut-off valve, and the connecting positions of the third connecting pipeline and the two air discharging pipelines are respectively positioned between the second connecting pipeline and the first connecting pipeline; the two gas discharging pipelines are respectively connected with a second cut-off valve, the second cut-off valve is positioned between the first connecting pipeline and the third connecting pipeline, and the gas discharging pipeline positioned between the second connecting pipeline and the third connecting pipeline is connected with a pressure transmitter;
the two ends of the purging pipeline are respectively connected with the second connecting pipeline and the third connecting pipeline, the purging pipeline is connected with a fifth cut-off valve, the high-pressure inert gas source is connected with the purging pipeline through a gas guide pipeline, the joint of the gas guide pipeline and the purging pipeline is positioned between the fifth cut-off valve and the second connecting pipeline, and the gas guide pipeline is connected with a sixth cut-off valve; the second connecting pipeline is connected with two third stop valves, the two third stop valves are respectively positioned on two sides of the purging pipeline, the third connecting pipeline is connected with two fourth stop valves, the two fourth stop valves are respectively positioned on two sides of the purging pipeline, and the third connecting pipeline between the two fourth stop valves is connected with the bleeding pipe.
2. The automatic gas discharging system for the hydrogen station as claimed in claim 1, wherein a first check valve is connected to the gas discharging pipe, and the first check valve is located between the second connecting pipe and the third connecting pipe.
3. The automatic gas discharging system for the hydrogen adding station as claimed in claim 1, wherein two second check valves are connected to the second connecting pipeline, and each second check valve is respectively located between each gas discharging pipeline and the purging pipeline.
4. The automatic gas discharging system for a hydrogen charging station according to claim 3, wherein said third shut-off valve is located between said second check valve and said gas discharging pipe.
5. The automatic gas discharging system for a hydrogen station of claim 1, wherein a safety valve is connected to a pipe connecting said bleeding pipe and said gas discharging pipe.
6. The automatic gas discharging system for a hydrogen adding station of claim 1, wherein the second shut-off valve is an electric valve.
7. The automatic gas discharging system for a hydrogen adding station of claim 1, wherein the third shut-off valve is an electric valve.
8. The automatic gas discharging system for a hydrogen adding station of claim 1, wherein the fourth cut-off valve is an electric valve.
9. A gas discharging method using the automatic gas discharging system for a hydrogen refueling station according to any one of claims 1 to 8, comprising the steps of:
s1, connecting the air inlet end of the air discharging pipeline with the long tube trailer, closing the valve of the long tube trailer, starting the automatic purging mode, and keeping the first cut-off valve in a normally open state;
s2, opening a fourth cut-off valve, closing the second cut-off valve, the third cut-off valve, the fifth cut-off valve and the sixth cut-off valve, communicating the two gas discharge pipelines with a third connecting pipeline, and closing the fourth cut-off valve after the pressure in the gas discharge system is released to micro-positive pressure;
s3, opening a third cut-off valve and a sixth cut-off valve, detecting the gas pressure in the gas discharge pipeline by using a pressure transmitter, closing the third cut-off valve and the sixth cut-off valve when the pressure transmitter detects that the pressure in the gas discharge pipeline is balanced within a first preset range, and cutting off a high-pressure inert gas source;
s4, opening a fourth cut-off valve to enable the two gas discharge pipelines to be communicated with a third connecting pipeline, and closing the fourth cut-off valve after the pressure in the gas discharge system is released to micro-positive pressure;
s5 repeating the steps S2-S4 for multiple times, ending the system purging, closing all the shut-off valves, and stopping the automatic purging mode;
s6, opening the valve of the tube trailer, enabling the first cut-off valve and the fifth cut-off valve to be normally opened, closing the second cut-off valve, the third cut-off valve, the fourth cut-off valve and the sixth cut-off valve, and starting an automatic air discharge mode;
s7, when the pressure transmitter detects that the pressure in the gas discharge pipeline is within a second preset range, opening a second cut-off valve to enable the two gas discharge pipelines to be communicated with the first connecting pipeline, and starting to discharge gas automatically;
s8, when the pressure transmitter detects that the pressure in the gas discharge pipeline is out of a second preset range, the second cut-off valve is closed, and automatic gas discharge is stopped.
10. The gas discharging method as claimed in claim 9, further comprising, after S6:
s9 the two gas discharging pipelines comprise a first gas discharging pipeline and a second gas discharging pipeline, when the pressure transmitter detects that the pressure in the first gas discharging pipeline is within a second preset range, a second stop valve on the first gas discharging pipeline is opened, a fourth stop valve and a third stop valve are closed, the second stop valve, the fourth stop valve and the third stop valve on the second gas discharging pipeline are closed, and the first gas discharging pipeline starts to discharge gas;
s10, when the pressure transmitter detects that the pressure in the first gas discharge pipeline is out of a second preset range and the pressure in the second gas discharge pipeline is in the second preset range, closing a second cut-off valve on the first gas discharge pipeline, opening the second cut-off valve on the second gas discharge pipeline, and starting gas discharge of the second gas discharge pipeline;
s11, when the second gas discharging pipeline discharges gas, the first gas discharging pipeline starts an automatic purging mode, the first cut-off valve on the first gas discharging pipeline is closed, the fourth cut-off valve connected with the first gas discharging pipeline on the third connecting pipeline is opened, and after the pressure in the gas discharging system is released to micro positive pressure, the fourth cut-off valve is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110843565.6A CN113586952A (en) | 2021-07-26 | 2021-07-26 | Automatic gas discharging system and method for hydrogenation station |
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| CN202110843565.6A CN113586952A (en) | 2021-07-26 | 2021-07-26 | Automatic gas discharging system and method for hydrogenation station |
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| CN (1) | CN113586952A (en) |
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| CN114526442A (en) * | 2022-04-22 | 2022-05-24 | 浙江浙能航天氢能技术有限公司 | Efficient hydrogenation system and method based on gas discharge column control |
| CN117212678A (en) * | 2023-11-07 | 2023-12-12 | 陕西华秦新能源科技有限责任公司 | System and method for continuously filling hydrogen into movable pressure vessel |
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| CN117212678B (en) * | 2023-11-07 | 2024-01-26 | 陕西华秦新能源科技有限责任公司 | System and method for continuously filling hydrogen into movable pressure vessel |
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Application publication date: 20211102 |