CN112833335A - Natural gas line liquid nitrogen gasification system - Google Patents
Natural gas line liquid nitrogen gasification system Download PDFInfo
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- CN112833335A CN112833335A CN202110151524.0A CN202110151524A CN112833335A CN 112833335 A CN112833335 A CN 112833335A CN 202110151524 A CN202110151524 A CN 202110151524A CN 112833335 A CN112833335 A CN 112833335A
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- liquid nitrogen
- natural gas
- gas pipeline
- nitrogen gasification
- gasification
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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
- F17D1/08—Pipe-line systems for liquids or viscous products
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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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
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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
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
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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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- 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
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
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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
- F17C2221/014—Nitrogen
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
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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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
Abstract
The invention belongs to the technical field of long-distance natural gas pipelines, and particularly relates to a liquid nitrogen gasification system of a natural gas pipeline. This include liquid nitrogen source and natural gas line liquid nitrogen gasification equipment, natural gas line liquid nitrogen gasification equipment includes switch board and the liquid nitrogen source interface, the quick action emergency valve, first low temperature plunger pump, fin vaporizer, electric heater, flowmeter, first temperature transmitter, first pressure transmitter and the natural gas line interface that communicate the setting in proper order, the switch board electricity respectively connects first low temperature plunger pump electric heater first temperature transmitter with first pressure transmitter, the liquid nitrogen source intercommunication the liquid nitrogen source interface. The natural gas pipeline liquid nitrogen gasification system provided by the invention improves the liquid nitrogen gasification efficiency, avoids the safety risk in the liquid nitrogen gasification process and improves the operation convenience.
Description
Technical Field
The invention belongs to the technical field of long-distance natural gas pipelines, and particularly relates to a liquid nitrogen gasification system of a natural gas pipeline.
Background
The nitrogen replacement is a key step of putting the long-distance natural gas pipeline into operation after production, construction and maintenance, air in a natural gas pipeline transmission system is discharged after liquid nitrogen is gasified, a prerequisite condition is provided for subsequent natural gas entering, meanwhile, the dew point of high-purity nitrogen used in the nitrogen replacement of the natural gas pipeline is low, the aim of drying the pipeline can be achieved by virtue of the adsorption capacity of the low dew point nitrogen on moisture during the nitrogen replacement, and important operation parameters such as the tightness of the pipeline can be checked after the natural gas pipeline is sealed and stored with nitrogen under a specific condition, so that the nitrogen replacement of the long-distance natural gas pipeline has strict safety control and technical requirements.
According to the industrial standard, when nitrogen is injected into the pipeline, the nitrogen injection speed of the main pipeline is more than 1m/s, and the nitrogen temperature of the injection pipeline is not lower than 5 ℃. Because long distance natural gas pipeline geographical position is remote, the required liquid nitrogen of pipeline all transports the operation scene through liquid nitrogen special-purpose vehicle, then uses simple and easy nitrogen gas gasification device to gasify, mainly has following not enoughly: 1. at present, the gas speed after the nitrogen gas is gasified and enters the pipeline is mainly calculated by setting the time for detecting the nitrogen gas at the monitoring points along the line, the calculation process is complicated, the efficiency is low, the nitrogen gas injection speed cannot be accurately controlled at the first time, and a flow meter is not configured. 2. The nitrogen gas gathers in a large number in the air and can produce the environment of suffocation, threatens to operation personnel life safety, and present device does not be equipped with the evacuation device of asphyxiating gas, and does not have the quick action emergency valve in the nitrogen gas pipeline, has the safety risk after a large amount of gas that takes place leaks. 3. The nitrogen injection has high requirements on pressure and flow, and needs to be controlled by a low-temperature plunger pump, the existing device is only provided with one plunger pump without a standby plunger pump, and when a pump body fails, nitrogen replacement operation is stopped, so that the overall engineering progress is influenced. 4. The existing device adopts an air bath type vaporizer, the number of gasification pipelines is small, the gasification efficiency is low, an electric heating device and a gasification fan are not arranged, and the risk that the temperature does not reach the standard exists in cold regions. 5. The current device is not provided with a standby liquid nitrogen interface. 6. The current devices are not provided with precision temperature transmitters and pressure transmitters. 7. The existing device does not realize integral movable skid mounting, and is poor in operation convenience. 8. The current device is not provided with a generator and cannot provide power for the device in a non-electricity environment.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a natural gas pipeline liquid nitrogen gasification system.
The technical scheme provided by the invention is as follows:
the utility model provides a natural gas line liquid nitrogen gasification system, includes liquid nitrogen source and natural gas line liquid nitrogen gasification equipment, natural gas line liquid nitrogen gasification equipment includes switch board and the liquid nitrogen source interface, the quick action emergency valve, first low temperature plunger pump, fin vaporizer, electric heater, flowmeter, first temperature transmitter, first pressure transmitter and the natural gas line interface that communicate the setting in proper order, the switch board electricity respectively is connected first low temperature plunger pump electric heater first temperature transmitter with first pressure transmitter, liquid nitrogen source intercommunication the liquid nitrogen source interface.
The natural gas pipeline liquid nitrogen gasification system based on the technical scheme comprises:
the system is provided with an emergency cut-off valve which can be cut off emergently when nitrogen leaks, so that the safety risk caused by nitrogen leakage is avoided;
the system is provided with the fin gasifier, so that the problems of few gasification pipelines and low gasification efficiency of the conventional air bath type gasifier are solved;
the system is provided with the electric heating device, so that nitrogen can be heated, and the risk that the temperature does not reach the standard in cold areas is avoided;
the system is provided with a flowmeter, and the flow can be monitored through a control cabinet;
the system is provided with the first temperature transmitter and the first pressure transmitter, the heating temperature of the electric heater can be adjusted according to the numerical value of the first temperature transmitter, the flow of the first low-temperature plunger pump can be adjusted according to the numerical value of the first pressure transmitter, the injection speed and the temperature of nitrogen are adjusted, the flow rate is measured through the flow meter, the problems that the gas speed after the nitrogen is gasified and enters the pipeline at present is mainly calculated through the time that the nitrogen is detected at monitoring points along the line, the calculation process is complex, and the efficiency is low are solved.
Preferably, the fin gasifier can be an eight-branch fin gasifier. Based on this, can show the solution existing air bath formula vaporizer gasification pipeline few, the problem that gasification efficiency is lower.
Specifically, the electric heater is a pipe type electric heater.
Furthermore, the natural gas pipeline liquid nitrogen gasification device further comprises at least one liquid nitrogen source reserved interface, and each liquid nitrogen source reserved interface is respectively communicated with the emergency cut-off valve.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, the liquid nitrogen source reserves the interface and can solve the problem that current device does not set up reserve liquid nitrogen interface.
Furthermore, the liquid nitrogen source interface with it is provided with second temperature transmitter and second pressure transmitter still to communicate in proper order between the quick action emergency valve second temperature transmitter with second pressure transmitter electricity respectively connects the switch board.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, set up second temperature transmitter and second pressure transmitter, can monitor the temperature and the pressure of system front end liquid nitrogen.
Furthermore, a second temperature transmitter and a second pressure transmitter are sequentially communicated between each liquid nitrogen source reserved interface and the emergency cut-off valve.
Further, the emergency cut-off valve and the fin gasifier are further communicated with a second low-temperature plunger pump, the first low-temperature plunger pump and the second low-temperature plunger pump are arranged in parallel, and the second low-temperature plunger pump is electrically connected with the control cabinet.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, first low temperature plunger pump with the parallelly connected setting of second low temperature plunger pump can solve and do not have reserve plunger pump, when taking place the pump body trouble, nitrogen gas replacement operation will be stagnated, influences the problem of whole engineering progress.
Furthermore, the fin vaporizer is provided with a vaporizing fan, and the vaporizing fan is electrically connected with the control cabinet.
Based on the natural gas line liquid nitrogen gasification system that above-mentioned technical scheme provided, the fin vaporizer is provided with the gasification fan, and accessible gasification fan accelerates the air flow of fin vaporizer, avoids fin vaporizer ambient temperature to last low excessively, leads to the gasification effect to reduce, avoids nitrogen gas to have the risk that the temperature is not up to standard in cold areas.
Further, the natural gas pipeline liquid nitrogen gasification device further comprises an exhaust fan, and the exhaust fan is electrically connected with the control cabinet.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, natural gas pipeline liquid nitrogen gasification equipment still includes the exhaust fan, can solve a large amount of gathering of nitrogen gas in the air and can produce the environment of suffocating, causes the threat to operation personnel life safety, has the problem of safe risk after a large amount of gas leaks in emergence.
Further, the control cabinet is electrically connected with a generator.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, the generator is connected to the switch board electricity, can provide electric power for each power consumption setting of device under the electroless environment.
Further, the natural gas pipeline liquid nitrogen gasification device is arranged on the skid-mounted chassis.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, natural gas pipeline liquid nitrogen gasification device sets up on the sled dress chassis, can realize improving the operation convenience to entire system movable type sled dress.
Furthermore, a rain cover is arranged on the prying device base plate.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, natural gas pipeline liquid nitrogen gasification equipment is provided with rain-proof cover, can rain-proof water.
Furthermore, the skid-mounted chassis is provided with a plurality of rollers.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, the sled dress chassis is provided with a plurality of gyro wheels, can realize the nimble removal and the sled dress of entire system.
Further, the liquid nitrogen source is liquid nitrogen vehicle.
Based on the natural gas pipeline liquid nitrogen gasification system that above-mentioned technical scheme provided, the liquid nitrogen source is the liquid nitrogen car, can cooperate the nimble removal and the sled dress of whole system.
Generally, the natural gas pipeline liquid nitrogen gasification system provided by the invention improves the liquid nitrogen gasification efficiency, avoids the safety risk in the liquid nitrogen gasification process and improves the operation convenience.
Drawings
FIG. 1 is a system diagram of a natural gas pipeline liquid nitrogen gasification system provided by the invention.
In fig. 1, the structure represented by each reference numeral is listed as follows:
1. liquid nitrogen car, 2, the interface is reserved to the liquid nitrogen source, 3, second temperature transmitter, 4, second pressure transmitter, 5, emergency cut-off valve, 6, first low temperature plunger pump, 7, second low temperature plunger pump, 8, fin vaporizer, 9, gasification fan, 10, electric heater, 11, flowmeter, 12, first temperature transmitter, 13, first pressure transmitter, 14, exhaust fan, 15, switch board, 16, the generator, 17, sled dress chassis, 18, gyro wheel, 19, natural gas pipeline.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
It will be understood that when an element or component is referred to as being "connected," "positioned" or "coupled" to another element or component, it can be directly on the other element or component or intervening elements or components may also be present. The terms "left", "right", "upper", "lower" and the like as used herein are for illustrative purposes only.
In a specific embodiment, as shown in fig. 1, the natural gas pipeline liquid nitrogen gasification system includes a liquid nitrogen vehicle 1 and a natural gas pipeline liquid nitrogen gasification device, the natural gas pipeline liquid nitrogen gasification device includes a control cabinet 15 and a liquid nitrogen source interface, an emergency cut-off valve 5, a first low-temperature plunger pump 6, a fin gasifier 8, an electric heater 10, a flowmeter 11, a first temperature transmitter 12, a first pressure transmitter 13 and a natural gas pipeline interface which are sequentially communicated, the liquid nitrogen source is communicated with the liquid nitrogen source interface, and the natural gas pipeline interface is communicated with a natural gas pipeline 19. The control cabinet 15 is electrically connected with the first low-temperature plunger pump 6, the electric heater 10, the first temperature transmitter 12, the first pressure transmitter 13 and the generator 16 respectively. The generator 16 supplies power to the first low-temperature plunger pump 6, the electric heater 10, the first temperature transmitter 12 and the first pressure transmitter 13 through a control cabinet 15. The control cabinet 15 adjusts the heating temperature of the electric heater 10 according to the value of the first temperature transmitter 12, and the control cabinet 15 adjusts the flow rate 6 of the first low-temperature plunger pump according to the value of the first pressure transmitter 13.
Based on the technical scheme: the system is provided with an emergency cut-off valve which can be cut off emergently when nitrogen leaks, so that the safety risk caused by nitrogen leakage is avoided; the system is provided with the fin gasifier, so that the problems of few gasification pipelines and low gasification efficiency of the conventional air bath type gasifier are solved; the system is provided with the electric heating device, so that nitrogen can be heated, and the risk that the temperature does not reach the standard in cold areas is avoided; the system is provided with a flowmeter, and the flow can be monitored through a control cabinet; the system is provided with the first temperature transmitter and the first pressure transmitter, the heating temperature of the electric heater can be adjusted according to the numerical value of the first temperature transmitter, the flow of the first low-temperature plunger pump can be adjusted according to the numerical value of the first pressure transmitter, the injection speed and the temperature of nitrogen are adjusted, the flow rate is measured through the flow meter, the problems that the gas speed after the nitrogen is gasified and enters the pipeline at present is mainly calculated through the time that the nitrogen is detected at monitoring points along the line, the calculation process is complex, and the efficiency is low are solved. The liquid nitrogen source is a liquid nitrogen vehicle, and can be matched with the flexible movement and skid-mounted of the whole system.
In one embodiment, the natural gas pipeline liquid nitrogen gasification device further comprises a liquid nitrogen source reserved interface 2, and the liquid nitrogen source reserved interface 2 is communicated with the emergency stop valve 5. Based on the natural gas pipeline liquid nitrogen gasification system provided by the technical scheme, the liquid nitrogen source reserved interface can solve the problem that a standby liquid nitrogen interface is not arranged in the conventional device.
In one embodiment, the liquid nitrogen source interface and the liquid nitrogen source reserved interface 2 and the emergency cut-off valve 5 are sequentially communicated with a second temperature transmitter 3 and a second pressure transmitter 4, and the second temperature transmitter 3 and the second pressure transmitter 4 are respectively and electrically connected with the control cabinet 15. The control cabinet 15 acquires the numerical information of the second temperature transmitter 3 and said second pressure transmitter 4 for monitoring and supplies them with power. Based on the natural gas pipeline liquid nitrogen gasification system provided by the technical scheme, the second temperature transmitter and the second pressure transmitter are arranged, so that the temperature and the pressure of liquid nitrogen at the front end of the system can be monitored.
In one embodiment, a second low-temperature plunger pump 7 is further communicated between the emergency cut-off valve 5 and the fin gasifier 8, and the first low-temperature plunger pump 6 and the second low-temperature plunger pump 7 are arranged in parallel. The second low-temperature plunger pump 7 is electrically connected with the control cabinet 15, and the generator 16 supplies power to the control cabinet 15. When the first low-temperature plunger pump 6 fails, the control cabinet 15 adjusts the flow rate of the second low-temperature plunger pump 7 according to the value of the first pressure transmitter 13. Based on the natural gas pipeline liquid nitrogen gasification system that this technical scheme provided, first low temperature plunger pump with second low temperature plunger pump sets up in parallel, can solve and do not have reserve plunger pump, when taking place the pump body trouble, nitrogen gas replacement operation will be stagnated, influences the problem of whole engineering progress.
In one embodiment, the finned gasifier 8 is provided with a gasification fan 9. The gasification fan 9 is electrically connected with a control cabinet 15, and the generator 16 supplies power to the control cabinet 15. Based on the natural gas pipeline liquid nitrogen gasification system that this technical scheme provided, the fin vaporizer is provided with the gasification fan, and accessible gasification fan accelerates the air flow of fin vaporizer, avoids fin vaporizer ambient temperature to last low temperature, leads to gasification efficiency to reduce, avoids nitrogen gas to have the risk that the temperature is not up to standard in cold areas. The control cabinet is electrically connected with the generator and can provide power for each power utilization device of the device in a non-electric environment.
In one embodiment, the natural gas pipeline liquid nitrogen gasification device further comprises an exhaust fan 14. The exhaust fan 14 is electrically connected with the control cabinet 15, and the generator 16 supplies power to the control cabinet 15. Based on the natural gas line liquid nitrogen gasification system that this technical scheme provided, natural gas line liquid nitrogen gasification equipment still includes the exhaust fan, can blow away the nitrogen gas of revealing, solves nitrogen gas and can produce the environment of suffocating in a large number of aggregations in the air, causes the threat to operation personnel life safety, has the problem of safe risk after a large amount of gas leakages. The control cabinet is electrically connected with the generator and can provide power for each power utilization device of the device in a non-electric environment.
In one embodiment, the natural gas pipeline liquid nitrogen gasification device is arranged on a skid-mounted chassis 17, and the skid-mounted chassis 17 is provided with a plurality of rollers 18. Based on the natural gas pipeline liquid nitrogen gasification system that this technical scheme provided, the sled dress chassis is provided with the gyro wheel, can realize improving operation convenience and entire system's flexibility to entire system movable type sled dress.
In one embodiment, the natural gas pipeline liquid nitrogen gasification device is provided with a rain cover. Based on the natural gas pipeline liquid nitrogen gasification system that this technical scheme provided, natural gas pipeline liquid nitrogen gasification equipment is provided with rain-proof cover, can the rain-proof water.
The working principle of the invention is as follows:
the emergency cut-off valve 5 is opened, and liquid nitrogen of the liquid nitrogen vehicle 1 sequentially flows through the second temperature transmitter 3, the second pressure transmitter 4 and the emergency cut-off valve 5 to enter the first low-temperature plunger pump 6 or the second low-temperature plunger pump 7 and then is gasified in the fin gasifier 8. The nitrogen gas flows through the electric heater 10, the flowmeter 11, the first temperature transmitter 12 and the first pressure transmitter 13 in sequence and enters the natural gas pipeline 19. In the process, the control cabinet 15 acquires the numerical information of the second temperature transmitter 3 and the second pressure transmitter 4 for monitoring; the control cabinet 15 adjusts the heating temperature of the electric heater 10 according to the value of the first temperature transmitter 12, and the control cabinet 15 adjusts the flow rate 6 of the first low-temperature plunger pump according to the value of the first pressure transmitter 13.
Based on the invention:
the system is provided with an emergency cut-off valve which can be cut off emergently when nitrogen leaks, so that the safety risk caused by nitrogen leakage is avoided;
the system is provided with the fin gasifier, so that the problems of few gasification pipelines and low gasification efficiency of the conventional air bath type gasifier are solved;
the system is provided with the electric heating device, so that nitrogen can be heated, and the risk that the temperature does not reach the standard in cold areas is avoided;
the system is provided with a flowmeter, and the flow can be monitored through a control cabinet;
the system is provided with the first temperature transmitter and the first pressure transmitter, the heating temperature of the electric heater can be adjusted according to the numerical value of the first temperature transmitter, the flow of the first low-temperature plunger pump can be adjusted according to the numerical value of the first pressure transmitter, the injection speed and the temperature of nitrogen are adjusted, the flow rate is measured through the flow meter, and the problems that the gas speed after the nitrogen is gasified and enters the pipeline at present is mainly calculated through the time that the nitrogen is detected at monitoring points arranged along the line, the calculation process is complicated, and the efficiency is low are solved;
the reserved interface of the liquid nitrogen source can solve the problem that a standby liquid nitrogen interface is not arranged in the conventional device;
a second temperature transmitter and a second pressure transmitter are arranged, so that the temperature and the pressure of liquid nitrogen at the front end of the system can be monitored;
the first low-temperature plunger pump and the second low-temperature plunger pump are arranged in parallel, so that the problem that the nitrogen replacement operation is stopped when a pump body fails and the overall engineering progress is influenced because a spare plunger pump is not provided can be solved;
the fin gasifier is provided with the gasification fan, so that the air flow of the fin gasifier can be accelerated through the gasification fan, the reduction of the gasification effect caused by the continuous over-low temperature around the fin gasifier is avoided, and the risk that the temperature of nitrogen in a cold area is not up to the standard is avoided;
the natural gas pipeline liquid nitrogen gasification device also comprises an exhaust fan, so that the problems that a suffocation environment is generated due to the large amount of accumulated nitrogen in the air, the life safety of operators is threatened, and the safety risk exists after a large amount of gas leaks are solved;
the control cabinet is electrically connected with the generator and can provide power for all power consumption settings of the device in a non-power environment;
the natural gas pipeline liquid nitrogen gasification device is arranged on the skid-mounted chassis, so that the whole system can be integrally and movably skid-mounted, and the operation convenience is improved;
the natural gas pipeline liquid nitrogen gasification device is provided with a rain cover which can prevent rainwater;
the skid-mounted chassis is provided with a plurality of rollers, so that the flexible movement and skid mounting of the whole system can be realized;
the liquid nitrogen source is a liquid nitrogen vehicle, and can be matched with the flexible movement and skid-mounted of the whole system.
The natural gas pipeline liquid nitrogen gasification system provided by the invention improves the liquid nitrogen gasification efficiency, avoids the safety risk in the liquid nitrogen gasification process and improves the operation convenience.
The foregoing is merely a preferred embodiment of this invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a natural gas line liquid nitrogen gasification system, its characterized in that includes liquid nitrogen source and natural gas line liquid nitrogen gasification equipment, natural gas line liquid nitrogen gasification equipment includes switch board (15) and the liquid nitrogen source interface, quick action valve (5), first low temperature plunger pump (6), fin vaporizer (8), electric heater (10), flowmeter (11), first temperature transmitter (12), first pressure transmitter (13) and the natural gas line interface that communicate the setting in proper order, switch board (15) electricity connection respectively first low temperature plunger pump (6) electric heater (10) first temperature transmitter (12) with first pressure transmitter (13), liquid nitrogen source intercommunication the liquid nitrogen source interface.
2. The natural gas pipeline liquid nitrogen gasification system of claim 1, wherein: the natural gas pipeline liquid nitrogen gasification device further comprises at least one liquid nitrogen source reserved interface (2), and the liquid nitrogen source reserved interfaces (2) are respectively communicated with the emergency stop valve (5).
3. The natural gas pipeline liquid nitrogen gasification system of claim 2, wherein:
a second temperature transmitter (3) and a second pressure transmitter (4) are sequentially communicated between the liquid nitrogen source interface and the emergency cut-off valve (5); the second temperature transmitter (3) and the second pressure transmitter (4) are respectively and electrically connected with the control cabinet (15).
4. The natural gas pipeline liquid nitrogen gasification system of claim 3, wherein: and the second temperature transmitter (3) and the second pressure transmitter (4) are sequentially communicated and arranged between each liquid nitrogen source reserved interface (2) and the emergency shut-off valve (5).
5. The natural gas pipeline liquid nitrogen gasification system of claim 1, wherein: the emergency cut-off valve (5) with still communicate between fin vaporizer (8) and be provided with second low temperature plunger pump (7), first low temperature plunger pump (6) with second low temperature plunger pump (7) parallel arrangement, second low temperature plunger pump (7) electricity is connected switch board (15).
6. The natural gas pipeline liquid nitrogen gasification system of claim 1, wherein:
the fin gasifier (8) is provided with a gasification fan (9), and the gasification fan (9) is electrically connected with the control cabinet (15);
the natural gas pipeline liquid nitrogen gasification device further comprises an exhaust fan (14), and the exhaust fan (14) is electrically connected with the control cabinet (15).
7. The natural gas pipeline liquid nitrogen gasification system according to any one of claims 1 to 6, characterized in that: the control cabinet (15) is electrically connected with a generator (16).
8. The natural gas pipeline liquid nitrogen gasification system according to any one of claims 1 to 6, characterized in that: the natural gas pipeline liquid nitrogen gasification device is arranged on the skid-mounted chassis (17); a rain cover is arranged on the skid-mounted chassis (17).
9. The natural gas pipeline liquid nitrogen gasification system of claim 8, wherein: the skid-mounted chassis (17) is provided with a plurality of rollers (18).
10. The natural gas pipeline liquid nitrogen gasification system according to any one of claims 1 to 6, characterized in that: the liquid nitrogen source is a liquid nitrogen vehicle (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110151524.0A CN112833335A (en) | 2021-02-03 | 2021-02-03 | Natural gas line liquid nitrogen gasification system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110151524.0A CN112833335A (en) | 2021-02-03 | 2021-02-03 | Natural gas line liquid nitrogen gasification system |
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| CN112833335A true CN112833335A (en) | 2021-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325449A (en) * | 2022-06-29 | 2022-11-11 | 安徽省天然气开发股份有限公司 | Monitoring device for natural gas pipeline replacement operation |
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2021
- 2021-02-03 CN CN202110151524.0A patent/CN112833335A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325449A (en) * | 2022-06-29 | 2022-11-11 | 安徽省天然气开发股份有限公司 | Monitoring device for natural gas pipeline replacement operation |
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