CN115325431A - System and method for removing pipeline hydrate blockage through hydrogen purging in recycling mode - Google Patents
System and method for removing pipeline hydrate blockage through hydrogen purging in recycling mode Download PDFInfo
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- CN115325431A CN115325431A CN202210961923.8A CN202210961923A CN115325431A CN 115325431 A CN115325431 A CN 115325431A CN 202210961923 A CN202210961923 A CN 202210961923A CN 115325431 A CN115325431 A CN 115325431A
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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
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
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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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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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
- 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
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a system and a method for removing pipeline hydrate blockage by circularly utilizing hydrogen purging. The system comprises a hydrogen storage tank, a booster pump, a hydrogen pressure stabilizing tank, a mass flow controller, a tubular reaction kettle, a gas-liquid separation device, a gas purification device, a gas drying device, a back pressure valve, a gas analysis instrument, an electromagnetic valve and the like. In the hydrogen purging and blockage removing process, a gas-liquid mixture is mainly discharged from the outlet end of a pipeline of the blocked reaction kettle, most of liquid is removed from the gas-liquid mixture through a gas-liquid separation device, then the gas-liquid mixture enters a gas purification device to remove oil dirt and the like carried by the gas purification device, the outlet end of the gas purification device is connected with a gas drying device to further remove water, after the dry gas is determined to be methane-poor gas through a gas analysis instrument, part of gas enters a circulating pipeline and is used for hydrogen purging again to remove the blockage process of the hydrate, so that the cyclic utilization of hydrogen is realized, the hydrogen consumption is reduced, and the hydrate prevention and control cost is reduced.
Description
Technical Field
The invention relates to the technical field of hydrogen circulation systems, in particular to a system and a method for removing hydrate blockage of a pipeline by circularly utilizing hydrogen purging.
Background
Hydrate blockage of a natural gas transportation pipeline seriously affects the transportation process, and a great amount of cost is invested by oil and gas companies every year for preventing and treating the hydrate. The hydrogen can dilute natural gas after pipeline hydrogen is mixed, reduce methane partial pressure and inhibit hydrate generation, so that the hydrogen can be used for preventing and controlling hydrate. Compared with the traditional alcohol injection method, the pipeline hydrogen doping is more green, the hydrate prevention and control cost is expected to be reduced, and the large-scale low-cost transportation of hydrogen can be realized.
Because a large amount of hydrogen is needed in the process of removing the blockage of the pipeline hydrate by hydrogen injection and blowing, if a one-off hydrogen injection and blowing mode is adopted, the prevention and treatment cost is not favorably reduced.
Accordingly, there is a need for improvements and developments in the art.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a system and a method for removing the blockage of the pipeline hydrate by recycling hydrogen purging, and aims to solve the problem that the existing one-time hydrogen injection purging mode is not beneficial to reducing the hydrate control cost.
The technical scheme of the invention is as follows:
a system for removing hydrate blockage of a pipeline by circularly utilizing hydrogen purging comprises a hydrogen storage tank, a booster pump, a hydrogen pressure stabilizing tank, a mass flow controller, a tubular reaction kettle, a gas-liquid separation device, a gas purification device, a gas drying device, a back pressure valve, a gas analysis instrument and an electromagnetic valve, wherein a hydrate plug is arranged in the tubular reaction kettle;
the hydrogen pressure stabilizing tank is connected with the mass flow controller and then connected into the tubular reaction kettle; the tubular reaction kettle is characterized in that a gas outlet end of the tubular reaction kettle is connected with a gas-liquid separation device, the top of the gas-liquid separation device is sequentially connected with a gas purification device, a gas drying device, a back pressure valve, a gas analysis instrument and an electromagnetic valve, the electromagnetic valve is connected with a hydrogen storage tank, the gas analysis instrument is used for analyzing the composition of gas, and the electromagnetic valve controls the opening of the valve according to the analysis result of the gas composition, so that the hydrogen enters the hydrogen storage tank, and the hydrogen is recycled.
Optionally, the system further comprises a storage tank pressure sensor, a surge tank pressure sensor, a pressure sensor before the kettle, a pressure sensor after the kettle, and a computer;
the storage tank pressure sensor, the pressure stabilizing tank pressure sensor, the pressure sensor in front of the kettle, the pressure sensor behind the kettle, the mass flow controller, the gas analyzer and the electromagnetic valve are connected to a computer through signal lines and used for monitoring the change of the system pressure and the composition of the purge gas;
the storage tank pressure sensor is connected to the hydrogen storage tank and used for measuring the pressure of the hydrogen storage tank;
the pressure sensor of the pressure stabilizing tank is connected to the hydrogen pressure stabilizing tank and used for measuring the pressure of the hydrogen pressure stabilizing tank;
the pressure sensor in front of the kettle is connected into the tubular reaction kettle and is used for measuring the pressure in front of the kettle; the pressure sensor behind the kettle is connected into the tubular reaction kettle and used for measuring the pressure behind the kettle.
Optionally, the system further comprises a first pressure regulating valve, a first stop valve, a check valve, a second stop valve, a second pressure regulating valve, a third stop valve, a fourth stop valve, a first tee, a second tee, and a fifth stop valve;
the first pressure regulating valve is positioned on a pipeline between the hydrogen storage tank and the booster pump, and the first stop valve is positioned on a pipeline between the first pressure regulating valve and the booster pump; the check valve is positioned on a pipeline between the booster pump and the hydrogen pressure stabilizing tank, and the second stop valve is positioned on a pipeline between the check valve and the hydrogen pressure stabilizing tank; the second pressure regulating valve is positioned on a pipeline between the hydrogen pressure stabilizing tank and the mass flow controller, and the third stop valve is positioned on a pipeline between the second pressure regulating valve and the mass flow controller; the fourth stop valve is positioned on a pipeline between the mass flow controller and the tubular reaction kettle, and the first tee joint is positioned on a pipeline between the fourth stop valve and the tubular reaction kettle; the second tee joint is positioned on a pipeline between the tubular reaction kettle and the gas-liquid separation device, and the fifth stop valve is positioned on a pipeline between the second tee joint and the gas-liquid separation device.
Optionally, the system further comprises a sixth shut-off valve; and the sixth stop valve is positioned on a pipeline between the electromagnetic valve and the hydrogen storage tank.
The invention relates to a method for removing hydrate blockage of a pipeline by recycling hydrogen purging, which is carried out based on a system for removing hydrate blockage of the pipeline by recycling hydrogen purging, and comprises the following steps of:
starting a booster pump to boost the hydrogen until the pressure in a hydrogen pressure stabilizing tank meets the requirement, adjusting a mass flow controller to set the hydrogen flow rate, and introducing the hydrogen into the tubular reaction kettle according to the set flow rate to purge and remove the hydrate blockage;
the material discharged from the tubular reaction kettle is subjected to impurity removal through a gas-liquid separation device, a gas purification device and a gas drying device, and then enters a gas analysis instrument to determine gas composition analysis, and the electromagnetic valve controls the opening of the valve according to the gas composition analysis result, so that hydrogen enters a hydrogen storage tank, and hydrogen recycling is realized.
Optionally, opening a first pressure regulating valve, a first stop valve and a second stop valve, starting a booster pump to boost the hydrogen, observing the pressure change in a hydrogen pressure stabilizing tank, adjusting a mass flow controller to set a hydrogen flow rate after the pressure meets the requirement, introducing the hydrogen into the tubular reaction kettle according to the set flow rate to purge and remove the hydrate plug, and then opening the second pressure regulating valve, a third stop valve, a fourth stop valve, a fifth stop valve and a sixth stop valve to realize that the hydrogen circularly enters the hydrogen storage tank to remove the hydrate plug in the tubular reaction kettle.
Optionally, the ratio of the pressure of the hydrogen pressure stabilizing tank to the pressure of the hydrogen storage tank is 2 to 8, and the pressure in the hydrogen pressure stabilizing tank is 3 to 10MPa.
Optionally, the hydrate plug in the tubular reactor is formed from methane or natural gas.
Optionally, when the gas composition analysis result shows that the methane volume ratio is in the range of 0-50%, opening a valve by using an electromagnetic valve to enable hydrogen to enter a hydrogen storage tank for recycling;
the electromagnetic valve realizes the hydrogen circulation amount of 30-70% by controlling the opening of the valve.
Optionally, hydrogen is introduced into the tubular reactor at a flow rate of 0.4 to 10 normal liters per minute.
Compared with the prior art, the invention has the following advantages:
(1) The invention can recycle the hydrogen used for purging, reduce the consumption of hydrogen and save the cost for preventing and controlling the hydrate;
(2) The method can remove water and other impurities in the decomposed gas of the hydrate plug through gas-liquid separation, purification and drying operations, and reduce the risk of the hydrate plug generated in the subsequent working section.
(3) The system and the method for removing the pipeline hydrate blockage by circularly utilizing the hydrogen purging can realize continuous operation and have an important effect on removing the pipeline hydrate blockage by industrially and practically utilizing the hydrogen purging.
Drawings
FIG. 1 is a schematic structural diagram of a system for removing pipeline hydrate blockage by hydrogen purging in a recycling manner according to an embodiment of the present invention;
in the figure: 1. the system comprises a hydrogen storage tank, 2, a first pressure regulating valve, 3, a first stop valve, 4, a storage tank pressure sensor, 5, a booster pump, 6, a check valve, 7, a second stop valve, 8, a hydrogen pressure stabilizing tank, 9, a second pressure regulating valve, 10, a pressure stabilizing tank pressure sensor, 11, a third stop valve, 12, a mass flow controller, 13, a fourth stop valve, 14, a first tee joint, 15, a pressure sensor before a kettle, 16, a tubular reaction kettle, 17, a second tee joint, 18, a pressure sensor after the kettle, 19, a fifth stop valve, 20, a gas-liquid separation device, 21, a gas purification device, 22, a gas drying device, 23, a back pressure valve, 24, a gas instrument, 25, an electromagnetic valve, 26, a sixth stop valve and 27, and a computer.
Fig. 2 is a flowchart of a system for removing pipeline hydrate blockage by hydrogen purging in a recycling manner according to an embodiment of the present invention.
Detailed Description
The invention provides a system and a method for removing pipeline hydrate blockage by recycling hydrogen purging, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an embodiment of the present invention provides a system for removing pipeline hydrate blockage by cyclic utilization of hydrogen purging, including a hydrogen storage tank 1, a booster pump 5, a hydrogen surge tank 8, a mass flow controller 12, a tubular reactor 16, a gas-liquid separation device 20, a gas purification device 21, a gas drying device 22, a back pressure valve 23, a gas analysis meter 24, and an electromagnetic valve 25, wherein the tubular reactor 16 has a hydrate plug;
the hydrogen storage tank 1 is connected with the booster pump 5 and then connected with the hydrogen pressure stabilizing tank 8, and the hydrogen pressure stabilizing tank 8 is connected with the mass flow controller 12 and then connected with the tubular reaction kettle 16; the tubular reaction kettle 16 is characterized in that a gas outlet end is connected with a gas-liquid separation device 20, the top of the gas-liquid separation device 20 is sequentially connected with a gas purification device 21, a gas drying device 22, a back pressure valve 23, a gas analysis instrument 24 and an electromagnetic valve 25, the electromagnetic valve 25 is connected with the hydrogen storage tank 1, the gas analysis instrument 24 is used for analyzing the composition of gas, and the electromagnetic valve 25 controls the opening of the valve according to the analysis result of the gas composition, so that hydrogen (purge gas) enters the hydrogen storage tank, and the hydrogen is recycled.
Further, the hydrate plug in the tubular reactor is formed from methane or natural gas.
In the hydrogen purging and blockage removing process, a gas-liquid mixture is mainly discharged from the outlet end of a pipeline of a blocked reaction kettle, most liquid of the gas-liquid mixture is removed through a gas-liquid separation device, then the gas-liquid mixture enters a gas purification device to remove oil dirt and the like carried by the gas purification device, the outlet end of the gas purification device is connected with a gas drying device to further remove water, after the dry gas is determined to be methane-poor gas (the volume ratio of methane is in the range of 0-50%) through a gas analysis instrument, a valve is opened through an electromagnetic valve, part of the purged gas enters a circulation pipeline and is used for purging and removing the blockage process of a hydrate again, so that the cyclic utilization of hydrogen is realized, the hydrogen consumption is reduced, and the hydrate prevention and control cost is reduced. That is, when it is determined that the methane gas is lean, the methane content is lower than 50%, and the hydrogen content is higher than 50%, the mixed gas of methane and hydrogen is used as pure hydrogen, and the gas enters a circulation pipeline and is used for purging the hydrate blockage removing process again, so that the hydrogen can be recycled.
The electromagnetic valve is connected with a gas analysis instrument, the opening of the valve is controlled according to the analysis result of the gas composition, and the circulating amount of the purge gas can be 30-70%.
Compared with the prior art, the embodiment of the invention has the following advantages:
(1) The hydrogen used for purging can be recycled, the hydrogen consumption is reduced, and the hydrate prevention and control cost is saved;
(2) Water and other impurities in the decomposed gas of the hydrate plug can be removed through gas-liquid separation, purification and drying operations, and the risk of the hydrate plug generated in the subsequent working section is reduced.
(3) The system for removing the pipeline hydrate blockage by circularly utilizing the hydrogen can realize continuous operation and has an important effect on removing the pipeline hydrate blockage by industrially and practically utilizing the hydrogen.
In one embodiment, as shown in fig. 1, the system further comprises a storage tank pressure sensor 4, a surge tank pressure sensor 10, a pre-tank pressure sensor 15, a post-tank pressure sensor 18, a computer 27;
the storage tank pressure sensor 4, the surge tank pressure sensor 10, the pressure sensor 15 in front of the kettle, the pressure sensor 18 behind the kettle, the mass flow controller 12, the gas analysis meter 24 and the electromagnetic valve 25 are connected to a computer 27 through signal lines and used for monitoring the change of the system pressure and the composition of the purge gas;
the storage tank pressure sensor 4 is connected to the hydrogen storage tank 1 to measure the pressure of the hydrogen storage tank;
the pressure stabilizing tank pressure sensor 10 is connected to the hydrogen pressure stabilizing tank 8 to measure the pressure of the hydrogen pressure stabilizing tank;
the pressure sensor 15 in front of the kettle is connected to the tubular reaction kettle 16 to measure the pressure in front of the kettle; the post-kettle pressure sensor 18 is connected to the tubular reaction kettle 16 to measure the post-kettle pressure.
In one embodiment, as shown in connection with fig. 1, the system further comprises a first pressure regulating valve 2, a first stop valve 3, a check valve 6, a second stop valve 7, a second pressure regulating valve 9, a third stop valve 11, a fourth stop valve 13, a first tee 14, a second tee 17 and a fifth stop valve 19;
the first pressure regulating valve 2 is positioned on a pipeline between the hydrogen storage tank 1 and the booster pump 5, and the first stop valve 3 is positioned on a pipeline between the first pressure regulating valve 2 and the booster pump 5; the check valve 6 is positioned on a pipeline between the booster pump 5 and the hydrogen pressure stabilizing tank 8, and the second stop valve 7 is positioned on a pipeline between the check valve 6 and the hydrogen pressure stabilizing tank 8; the second pressure regulating valve 9 is positioned on a pipeline between the hydrogen pressure stabilizing tank 8 and the mass flow controller 12, and the third stop valve 11 is positioned on a pipeline between the second pressure regulating valve 9 and the mass flow controller 12; the fourth stop valve 13 is positioned on a pipeline between the mass flow controller 12 and the tubular reaction kettle 16, and the first tee joint 14 is positioned on a pipeline between the fourth stop valve 13 and the tubular reaction kettle 16; the second tee 17 is located on a pipeline between the tubular reaction kettle 16 and the gas-liquid separation device 20, and the fifth stop valve 19 is located on a pipeline between the second tee 17 and the gas-liquid separation device 20.
With reference to fig. 2, an embodiment of the present invention provides a method for removing pipeline hydrate blockage by recycling hydrogen purge, which is performed based on the system for removing pipeline hydrate blockage by recycling hydrogen purge as described in any one of the foregoing embodiments, and includes the following steps:
starting a booster pump to boost the hydrogen until the pressure in a hydrogen pressure stabilizing tank meets the requirement, adjusting a mass flow controller to set the hydrogen flow rate, and introducing the hydrogen into the tubular reaction kettle according to the set flow rate to purge and remove the hydrate blockage;
the material discharged from the tubular reaction kettle is subjected to impurity removal through a gas-liquid separation device, a gas purification device and a gas drying device, and then enters a gas analysis instrument to determine gas composition analysis, and the electromagnetic valve controls the opening of the valve according to the gas composition analysis result, so that hydrogen enters a hydrogen storage tank, and hydrogen recycling is realized.
In one embodiment, a hydrate plug is arranged in a tubular reaction kettle 16, a pressure sensor 15 before the kettle and a pressure sensor 18 after the kettle are respectively connected into the tubular reaction kettle 16 through a first tee joint 14 and a second tee joint 17, a backpressure valve 23 is adjusted, the purging pressure is set to be 1-10 MPa, a first pressure regulating valve 2, a first stop valve 3 and a second stop valve 7 are opened, a booster pump 5 is started to boost the purging gas, the pressure change in a hydrogen pressure stabilizing tank 8 is observed, after the pressure is 3-10 MPa, a mass flow controller 12 is adjusted to set the hydrogen flow rate to be 0.4-10 standard liters/minute, then a second pressure regulating valve 9, a third stop valve 11, a fourth stop valve 13, a fifth stop valve 19 and a sixth stop valve 26 are opened, and the purging gas is introduced to relieve the hydrate plug in the tubular reaction kettle 16;
the material discharged from the tubular reaction kettle 16 passes through a gas-liquid separation device 20, a gas purification device 21 and a gas drying device 22 to remove impurities such as liquid, oil stain and solid, then enters a gas analysis instrument 24 to determine the content of methane in a gas phase, the opening degree of a solenoid valve is controlled according to the composition analysis result, and part of gas is sent to the hydrogen storage tank 1 for recycling.
In summary, the present invention provides a system and a method for removing pipeline hydrate blockage by hydrogen purging in a recycling manner. The system comprises a gas-liquid separation device, a gas purification device, a gas drying device, a gas analysis instrument, an electromagnetic valve, a mass flow controller, a booster pump, a pressure regulating valve, a check valve and the like. In the hydrogen purging and blockage removing process, a gas-liquid mixture is mainly discharged from the outlet end of the blocked pipeline, most liquid of the gas-liquid mixture is removed through a gas-liquid separation device, then the gas-liquid mixture enters a gas purification device to remove oil dirt and the like carried by the gas purification device, the outlet end of the gas purification device is connected with a gas drying device to further remove water, after dry gas is determined to be methane-poor gas through a gas analysis instrument, part of gas enters a circulation pipeline and is used for the hydrogen purging and blockage removing process of hydrates again, so that the hydrogen recycling is realized, the hydrogen consumption is reduced, and the hydrate prevention and control cost is reduced.
It will be understood that the invention is not limited to the examples described above, but that modifications and variations will occur to those skilled in the art in light of the above teachings, and that all such modifications and variations are considered to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A system for removing hydrate blockage of a pipeline by recycling hydrogen purging is characterized by comprising a hydrogen storage tank, a booster pump, a hydrogen pressure stabilizing tank, a mass flow controller, a tubular reaction kettle, a gas-liquid separation device, a gas purification device, a gas drying device, a back pressure valve, a gas analysis instrument and an electromagnetic valve, wherein the tubular reaction kettle is provided with a hydrate plug;
the hydrogen pressure stabilizing tank is connected with the mass flow controller and then connected into the tubular reaction kettle; the tubular reaction kettle is characterized in that a gas outlet end of the tubular reaction kettle is connected with a gas-liquid separation device, the top of the gas-liquid separation device is sequentially connected with a gas purification device, a gas drying device, a back pressure valve, a gas analysis instrument and an electromagnetic valve, the electromagnetic valve is connected with a hydrogen storage tank, the gas analysis instrument is used for analyzing the composition of gas, and the electromagnetic valve controls the opening of the valve according to the analysis result of the gas composition, so that hydrogen enters the hydrogen storage tank, and the hydrogen is recycled.
2. The system for removing the hydrate blockage of the pipeline by the cyclic utilization of the hydrogen purging according to claim 1, wherein the system further comprises a storage tank pressure sensor, a surge tank pressure sensor, a pressure sensor in front of the kettle, a pressure sensor behind the kettle and a computer;
the storage tank pressure sensor, the pressure stabilizing tank pressure sensor, the pressure sensor in front of the kettle, the pressure sensor behind the kettle, the mass flow controller, the gas analyzer and the electromagnetic valve are connected to a computer through signal lines and used for monitoring the change of the system pressure and the composition of the purge gas;
the storage tank pressure sensor is connected to the hydrogen storage tank and used for measuring the pressure of the hydrogen storage tank;
the pressure sensor of the pressure stabilizing tank is connected to the hydrogen pressure stabilizing tank and used for measuring the pressure of the hydrogen pressure stabilizing tank;
the pressure sensor in front of the kettle is connected into the tubular reaction kettle and used for measuring the pressure in front of the kettle; the pressure sensor behind the kettle is connected into the tubular reaction kettle and used for measuring the pressure behind the kettle.
3. The system for removing hydrate blockage of a pipeline by cyclic utilization of hydrogen purging according to claim 1, further comprising a first pressure regulating valve, a first stop valve, a check valve, a second stop valve, a second pressure regulating valve, a third stop valve, a fourth stop valve, a first tee, a second tee and a fifth stop valve;
the first pressure regulating valve is positioned on a pipeline between the hydrogen storage tank and the booster pump, and the first stop valve is positioned on a pipeline between the first pressure regulating valve and the booster pump; the check valve is positioned on a pipeline between the booster pump and the hydrogen pressure stabilizing tank, and the second stop valve is positioned on a pipeline between the check valve and the hydrogen pressure stabilizing tank; the second pressure regulating valve is positioned on a pipeline between the hydrogen pressure stabilizing tank and the mass flow controller, and the third stop valve is positioned on a pipeline between the second pressure regulating valve and the mass flow controller; the fourth stop valve is positioned on a pipeline between the mass flow controller and the tubular reaction kettle, and the first tee joint is positioned on a pipeline between the fourth stop valve and the tubular reaction kettle; the second tee joint is positioned on a pipeline between the tubular reaction kettle and the gas-liquid separation device, and the fifth stop valve is positioned on a pipeline between the second tee joint and the gas-liquid separation device.
4. The system for removing hydrate blockage of a pipeline with hydrogen purging according to claim 1, further comprising a sixth stop valve; and the sixth stop valve is positioned on a pipeline between the electromagnetic valve and the hydrogen storage tank.
5. A method for removing hydrate blockage of a pipeline by recycling hydrogen purging is carried out based on the system for removing hydrate blockage of the pipeline by recycling hydrogen purging as claimed in any one of claims 1 to 4, and comprises the following steps:
starting a booster pump to boost the hydrogen until the pressure in a hydrogen pressure stabilizing tank meets the requirement, adjusting a mass flow controller to set the hydrogen flow rate, and introducing the hydrogen into the tubular reaction kettle according to the set flow rate to purge and remove the hydrate blockage;
impurities of hydrates discharged from the tubular reaction kettle are removed through a gas-liquid separation device, a gas purification device and a gas drying device, the hydrates enter a gas analysis instrument to determine gas composition analysis, and an electromagnetic valve controls the opening of a valve according to a gas composition analysis result to enable hydrogen to enter a hydrogen storage tank, so that hydrogen recycling is realized.
6. The method for removing the hydrate blockage of the pipeline by recycling the hydrogen purging as claimed in claim 5, wherein the first pressure regulating valve, the first stop valve and the second stop valve are opened, the booster pump is started to boost the hydrogen, the pressure change in the hydrogen pressure stabilization tank is observed, the mass flow controller is adjusted to set the hydrogen flow rate after the pressure meets the requirement, the hydrogen is introduced into the tubular reaction kettle according to the set flow rate to purge and remove the hydrate plug, and then the second pressure regulating valve, the third stop valve, the fourth stop valve, the fifth stop valve and the sixth stop valve are opened to realize that the hydrogen circularly enters the hydrogen storage tank to remove the hydrate plug in the tubular reaction kettle.
7. The method for removing the hydrate blockage of the pipeline by recycling the hydrogen gas as claimed in claim 5, wherein the pressure ratio of the hydrogen pressure stabilizing tank to the hydrogen storage tank is 2-8, and the pressure in the hydrogen pressure stabilizing tank is 3-10 MPa.
8. The method for removing pipeline hydrate blockage using hydrogen purging as claimed in claim 5, wherein the hydrate plug in the tubular reactor is formed from methane or natural gas.
9. The method for removing the pipeline hydrate blockage through the hydrogen purging in a recycling mode according to claim 8, wherein when the gas composition analysis result shows that the methane volume ratio is in the range of 0-50%, the electromagnetic valve opens the valve, and hydrogen enters the hydrogen storage tank to be recycled;
the electromagnetic valve realizes the hydrogen circulation amount of 30-70% by controlling the opening of the valve.
10. The method for removing the hydrate blockage of the pipeline by recycling the hydrogen gas as claimed in claim 5, wherein the hydrogen gas is introduced into the tubular reaction kettle at a flow rate of 0.4 to 10 normal liters per minute.
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| CN202210961923.8A CN115325431A (en) | 2022-08-11 | 2022-08-11 | System and method for removing pipeline hydrate blockage through hydrogen purging in recycling mode |
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| CN202210961923.8A CN115325431A (en) | 2022-08-11 | 2022-08-11 | System and method for removing pipeline hydrate blockage through hydrogen purging in recycling mode |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210108436U (en) * | 2019-07-24 | 2020-02-21 | 赵俊超 | Intelligent purging natural gas metering device |
| CN210560296U (en) * | 2019-07-18 | 2020-05-19 | 山西高碳能源低碳化利用研究设计院有限公司 | Natural gas hydrate physical property research device |
| CN112628599A (en) * | 2019-10-08 | 2021-04-09 | 中国石油化工股份有限公司 | Natural gas gathering and transportation system and sulfur blockage prevention device thereof |
| US20220135866A1 (en) * | 2020-11-05 | 2022-05-05 | Saudi Arabian Oil Company | Methods of dissolving gas hydrates |
| CN114636803A (en) * | 2022-02-08 | 2022-06-17 | 华南理工大学 | Experimental device and method for removing hydrate blockage of natural gas pipeline by gas purging |
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2022
- 2022-08-11 CN CN202210961923.8A patent/CN115325431A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210560296U (en) * | 2019-07-18 | 2020-05-19 | 山西高碳能源低碳化利用研究设计院有限公司 | Natural gas hydrate physical property research device |
| CN210108436U (en) * | 2019-07-24 | 2020-02-21 | 赵俊超 | Intelligent purging natural gas metering device |
| CN112628599A (en) * | 2019-10-08 | 2021-04-09 | 中国石油化工股份有限公司 | Natural gas gathering and transportation system and sulfur blockage prevention device thereof |
| US20220135866A1 (en) * | 2020-11-05 | 2022-05-05 | Saudi Arabian Oil Company | Methods of dissolving gas hydrates |
| CN114636803A (en) * | 2022-02-08 | 2022-06-17 | 华南理工大学 | Experimental device and method for removing hydrate blockage of natural gas pipeline by gas purging |
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