CN217481338U - Marine natural gas pipe network residual pressure recovery unit - Google Patents
Marine natural gas pipe network residual pressure recovery unit Download PDFInfo
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- CN217481338U CN217481338U CN202221995206.9U CN202221995206U CN217481338U CN 217481338 U CN217481338 U CN 217481338U CN 202221995206 U CN202221995206 U CN 202221995206U CN 217481338 U CN217481338 U CN 217481338U
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Abstract
The utility model provides a marine natural gas pipe network residual pressure recovery unit relates to residual pressure and retrieves technical field. The utility model provides a marine natural gas pipe network residual pressure recovery unit, includes air supply line, pressure regulating pipeline, electricity generation pipeline and recovery pipeline, and the air supply line is connected with the recovery pipeline, and the pressure regulating pipeline is parallelly connected between air supply line and recovery pipeline with the electricity generation pipeline. An expansion power generation assembly is connected in series on the power generation pipeline, the gas inlet end of the expansion power generation assembly is connected with the gas supply pipeline, and the gas outlet end of the expansion power generation assembly is connected with the recovery pipeline. The pressure regulating pipeline is connected in series with a first pressure regulating valve. This marine natural gas pipe network residual pressure recovery unit can utilize the electricity generation to the natural gas pipe network residual pressure, and at unit start-up and speed rise in-process steady control, when the trouble of expansion generating set, parking scheduling problem take place, promptly turn-off keeps apart the natural gas flow, avoids large-traffic impact in the twinkling of an eye, causes normal air feed to produce great fluctuation.
Description
Technical Field
The utility model relates to a residual pressure retrieves technical field, particularly, relates to a marine natural gas pipe network residual pressure recovery unit.
Background
The reserves of seabed natural gas account for about 50% of the total reserves of natural gas in the world. Offshore gas production and oil production are closely related, and some offshore gas fields are oil fields at the same time, so the offshore gas production is also called offshore oil and gas production. In the traditional pressure regulating process, the natural gas is throttled and depressurized through a pressure reducing valve, no mechanical work is pushed, and the part of pressure energy is wasted. Therefore, it is urgent to recover the pressure energy and to have certain economic and social benefits. The use of "overboard pressure" of offshore natural gas is not widespread today.
The 'residual pressure power generation' of the offshore natural gas is realized by converting pressure energy into mechanical energy through a turboexpander by utilizing the pressure difference between an upstream natural gas pipe network and a downstream pipe network, and the generated electric energy can be directly used for the production of other devices. The existing residual pressure recovery device for the offshore natural gas pipeline network has the problems that the expansion power generation assembly breaks down and an emergency stop is caused easily because the fluctuation is large and the change of the inlet flow is large due to the influence of the upstream and downstream pressure differences in the starting and accelerating processes.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a marine natural gas pipe network residual pressure recovery unit, it can utilize the electricity generation to natural gas pipe network residual pressure, starts at the unit and rises fast in-process stable control, and when expansion generator set trouble, parking scheduling problem took place, in time promptly turn-offs, keeps apart the natural gas flow, avoids large-traffic impact in the twinkling of an eye, causes normal air feed to produce great fluctuation.
The embodiment of the utility model is realized like this:
the embodiment of the application provides a surplus pressure recovery device for an offshore natural gas pipe network, which comprises an air supply pipeline, a pressure regulating pipeline, a power generation pipeline and a recovery pipeline, wherein the air supply pipeline is connected with the recovery pipeline, and the pressure regulating pipeline and the power generation pipeline are connected in parallel between the air supply pipeline and the recovery pipeline;
an expansion power generation assembly is connected in series on the power generation pipeline, the gas inlet end of the expansion power generation assembly is connected with a gas supply pipeline, and the gas outlet end of the expansion power generation assembly is connected with a recovery pipeline;
the pressure regulating pipeline is connected in series with a first pressure regulating valve.
In some embodiments of the present invention, a second pressure regulating valve is disposed on the pressure regulating pipeline, and the second pressure regulating valve is connected in parallel with the first pressure regulating valve.
In some embodiments of the present invention, the first pressure regulating valve and the second pressure regulating valve are explosion-proof valves.
The utility model discloses an in some embodiments, be provided with the bypass pipeline between above-mentioned air supply line and the recovery pipeline, bypass pipeline and electricity generation pipeline are parallelly connected between air supply line and recovery pipeline.
In some embodiments of the present invention, a bypass quick-opening valve is connected in series to the bypass line.
In some embodiments of the present invention, a loading valve is connected in series to the power generation pipeline, and the loading valve is located between the expansion power generation assembly and the air supply pipeline.
The utility model discloses an in some embodiments, it has emergent shutoff valve to establish ties on the above-mentioned power generation pipeline, and emergent shutoff valve is located inflation power generation subassembly and recovery pipeline between.
In some embodiments of the present invention, the air supply pipe is sequentially connected in series with a main control valve, a filtering separator and a first electric heater, and an outlet end of the first electric heater is communicated with the loading valve.
In some embodiments of the present invention, a second electric heater is connected in series to the recovery pipeline, and the second electric heater is communicated with the emergency shut-off valve.
In some embodiments of the present invention, a slug flow catcher is further connected in series on the recovery pipeline.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:
the utility model relates to a marine natural gas pipe network residual pressure recovery unit, including air supply line, pressure regulating pipeline, electricity generation pipeline and recovery pipeline. The gas supply pipeline is used for supplying natural gas with pressure, so that the natural gas enters the corresponding pipeline. The power generation pipeline is used for realizing the residual pressure power generation of the natural gas, and the recovery pipeline is used for recovering the natural gas for completing the power generation. The pressure regulating pipeline realizes the pressure difference regulation of the upstream pressure and the downstream pressure of the power generation pipeline by the residual light, and can avoid the problems of faults, emergency stop and the like caused by the problems of large pressure difference and the like. The air supply pipeline is connected with the recovery pipeline, and the pressure regulating pipeline and the power generation pipeline are connected in parallel between the air supply pipeline and the recovery pipeline. The gas supply pipeline is connected with the recovery pipeline, the pressure regulating pipeline and the power generation pipeline are connected in parallel between the gas supply pipeline and the recovery pipeline, at the moment, the pressure regulating pipeline can be subjected to pressure regulating treatment, a part of natural gas can enter the recovery pipeline from the pressure regulating pipeline, the pressure between the gas supply pipeline and the power generation pipeline is regulated, the pressure difference between the gas supply pipeline node at the upstream of the power generation pipeline and the recovery pipeline node at the downstream of the power generation pipeline can be reduced, and grid-connected power supply can be carried out until the power generation assembly is in a stable power generation state. In the process, because the upstream and downstream pressure difference of the power generation pipeline is reduced, the instantaneous flow can be reduced, and the problems of stopping and the like caused by the failure of the expansion power generation assembly on the following power generation pipeline due to the instantaneous large-flow impact can be avoided. The power generation pipeline is connected in series with an expansion power generation assembly, the gas inlet end of the expansion power generation assembly is connected with the gas supply pipeline, and the gas outlet end of the expansion power generation assembly is connected with a recovery pipeline. The expansion power generation assembly is equipment capable of generating power by utilizing natural gas excess pressure, and is connected in series on a power generation pipeline to effectively generate power by utilizing the excess pressure of natural gas introduced from an air supply pipeline. And the natural gas after the power generation can enter a recovery pipeline for recovery. The pressure regulating pipeline is connected in series with a first pressure regulating valve. The first pressure regulating valve is an intuitive and simple flow regulating control device, which can reduce the inlet pressure to a certain required outlet pressure through regulation, and can automatically keep the outlet pressure stable by means of the energy of the medium. At the moment, the pressure difference at the two ends of the pressure regulating pipeline is changed through the first pressure regulating valve, so that the problems of large pressure difference change, large fluctuation and the like between the gas inlet end and the gas outlet end of the expansion power generation assembly can be solved, and the problems of parking and the like caused by the failure of the expansion power generation assembly can be effectively avoided.
Therefore, the recovery device for the residual pressure of the offshore natural gas pipe network can utilize the residual pressure of the natural gas pipe network for power generation, the power generation is stably controlled in the starting and speed-up processes of the unit, and when the problems of failure, parking and the like of the expansion power generation unit occur, the power generation unit is timely and emergently turned off to isolate the natural gas flow, so that the phenomenon that the normal gas supply generates large fluctuation due to large-flow impact in the moment is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Icon: 1-an air supply pipeline, 2-a pressure regulating pipeline, 3-a power generation pipeline, 4-a recovery pipeline, 5-an expander, 6-a power generator, 7-a first pressure regulating valve, 8-a second pressure regulating valve, 9-a bypass pipeline, 10-a bypass quick-opening valve, 11-a loading valve, 12-an emergency shut-off valve, 13-a master control valve, 14-a first electric heater, 15-a filtering separator, 16-a second electric heating valve and 17-a section plug flow catcher.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" means at least 2 if appearing.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "set", "mounted", "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the present invention. The embodiment provides a marine natural gas pipe network residual pressure recovery unit, including air supply line 1, pressure regulating pipeline 2, power generation pipeline 3 and recovery pipeline 4. The gas supply line 1 is used for supplying natural gas with pressure to make the natural gas enter into the corresponding line. The power generation pipeline 3 is used for realizing natural gas residual pressure power generation, and the recovery pipeline 4 is used for recovering natural gas after power generation is completed. The pressure regulating pipeline 2 realizes the pressure difference regulation of the upstream and downstream pressures of the power generation pipeline 3 by using the residual light, and can avoid the problems of faults, emergency stop and the like caused by the problems of large pressure difference and the like.
In the present embodiment, the air supply line 1 is connected to the recovery line 4, and the pressure-regulating line 2 and the power generation line 3 are connected in parallel between the air supply line 1 and the recovery line 4.
In this embodiment, the air supply line 1 and the recovery line 4 are connected, and the pressure regulating line 2 and the power generation line 3 are connected in parallel between the air supply line 1 and the recovery line 4, and at this time, the pressure regulating line 2 may be subjected to pressure regulation processing to allow a part of natural gas to enter the recovery line 4 from the pressure regulating line 2, thereby regulating the pressure between the air supply line 1 and the power generation line 3, and reducing the differential pressure between the air supply line 1 node at the upstream of the power generation line 3 and the recovery line 4 node at the downstream until the power generation module is in a stable power generation state, thereby enabling grid-connected power supply. In the process, because the pressure difference between the upstream and the downstream of the power generation pipeline 3 is reduced, the instantaneous flow can be reduced, and the problems of stopping and the like caused by the failure of the expansion power generation assembly on the power generation pipeline 3 due to the instantaneous large-flow impact can be avoided.
In the present embodiment, an expansion power generation module is connected in series to the power generation line 3, a gas inlet end of the expansion power generation module is connected to the gas supply line 1, and a gas outlet end of the expansion power generation module is connected to a recovery line 4.
In the present embodiment, the expansion power generation module is a device capable of generating power by using the residual pressure of natural gas, and is connected in series to the power generation pipeline 3 to efficiently generate power by using the residual pressure of natural gas introduced from the gas supply pipeline 1. The natural gas after the power generation can enter a recovery pipeline 4 for recovery.
In the present embodiment, a first pressure regulating valve 7 is connected in series to the pressure regulating line 2. The first pressure regulating valve 7 is an intuitive and simple flow rate regulating control device which can reduce the inlet pressure thereof to a certain required outlet pressure by regulation and automatically stabilize the outlet pressure by the energy of the medium itself. At this time, the pressure difference between the two ends of the pressure regulating pipeline 2 is changed through the first pressure regulating valve 7, so that the problems of large pressure difference change, large fluctuation and the like between the gas inlet end and the gas outlet end of the expansion power generation assembly can be solved, and the problems of parking and the like caused by the failure of the expansion power generation assembly can be effectively avoided.
Therefore, the recovery device for the residual pressure of the offshore natural gas pipe network can utilize the residual pressure of the natural gas pipe network for power generation, the power generation is stably controlled in the starting and speed-up processes of the unit, and when the problems of failure, parking and the like of the expansion power generation unit occur, the power generation unit is timely and emergently turned off to isolate the natural gas flow, so that the phenomenon that the normal gas supply generates large fluctuation due to large-flow impact in the moment is avoided.
In some embodiments of the present invention, a second pressure regulating valve 8 is provided in the pressure regulating line 2, and the second pressure regulating valve 8 is connected in parallel to the first pressure regulating valve 7.
In this embodiment, the second pressure regulating valve 8 functions as a backup. The first and second pressure regulating valves 7 and 8 are the same, and a backup method may be adopted, and when the first or second pressure regulating valve 7 or 8 needs to be closed for maintenance or the like, the other pressure regulating valve can be opened.
In some embodiments of the present invention, the first pressure regulating valve 7 and the second pressure regulating valve 8 are explosion-proof valves.
In this embodiment, the explosion-proof valve is formed by enclosing all the components which may ignite explosive gas mixture in the valve body in a casing, the casing can bear the explosive mixture which penetrates into the casing through any joint surface or structural gap of the casing, the combustible mixture can explode without damage in the casing, and the explosion-proof casing can not cause the ignition of the explosive environment formed by one or more gases or steam outside, and the components which may generate sparks, electric arcs and dangerous temperatures are all placed in the explosion-proof casing, and the explosion-proof casing can separate the internal space of the equipment from the surrounding environment. The explosion-proof valve can be connected with other control components, and the automatic control of the explosion-proof valve can be realized.
In some embodiments of the present embodiment, a bypass line 9 is provided between the air supply line 1 and the recovery line 4, and the bypass line 9 and the power generation line 3 are connected in parallel between the air supply line 1 and the recovery line 4.
In this embodiment, the bypass line 9 may be opened to open the bypass line 9 when the generator 6 set stops operating, so as to prevent the downstream air from being impacted.
In some embodiments of the present embodiment, a bypass quick-opening valve 10 is connected in series to the bypass line 9.
In the present embodiment, the bypass quick-opening valve 10 can be opened in time when the generator 6 set stops operating, so as to avoid the problem of untimely opening.
In some embodiments of the present embodiment, a loading valve 11 is connected in series to the power generation pipeline 3, and the loading valve 11 is located between the expansion power generation module and the gas supply pipeline 1.
In the present embodiment, the loading valve 11 can control the smooth loading of the power generation assembly, and prevent the fluctuation of the air volume in the system located downstream of the power generation pipeline 3.
In some embodiments of the present embodiment, an emergency shut-off valve 12 is connected in series to the power generation pipeline 3, and the emergency shut-off valve 12 is located between the expansion power generation module and the recovery pipeline 4.
In the present embodiment, the emergency shut-off valve 12 can be closed in an emergency to shut off the power generation pipeline 3 in an emergency when a fire, a leak, or the like occurs in the power generation module.
In some embodiments of the present embodiment, a main control valve 13, a filtering separator 15 and a first electric heater 14 are connected in series to the gas supply line 1 in this order, and an outlet end of the first electric heater 14 is communicated with the charging valve 11.
In the present embodiment, the main control valve 13 is opened and closed to the main control gas supply line 1. The filtering separator 15 can filter out various micro particles in the natural gas, can effectively filter out moisture, fibers and suspended matters in the natural gas, and is excellent natural gas purifying equipment. The first electric heater 14 is used for heating the natural gas in the gas supply line 1.
In some embodiments of the present embodiment, a second electric heater is connected in series to the recovery line 4, and the second electric heater is communicated with the emergency shut-off valve 12.
In this embodiment, the second electric heater is used to heat the natural gas in the recovery line 4.
In some embodiments of the present embodiment, a slug catcher 17 is further connected in series to the recovery pipeline 4. The slug flow catcher 17 is a terminal device of a multiphase flow pipeline, and is used for catching a liquid slug flowing out of the multiphase flow pipeline, performing gas-liquid separation, providing a buffer volume for gas flow fluctuation, and providing stable gas flow for downstream processing equipment.
In the present embodiment, the power generation module includes an expander 5 and a power generator 6, and the expander 5 uses a gas having a certain pressure to perform adiabatic expansion in the expander 5 to perform external work, thereby consuming internal energy of the gas itself, so that the gas itself is strongly cooled to achieve the purpose of refrigeration. The expander 5 can drive the generator 6 to generate power in the above process.
When the natural gas expansion device is used, the treated natural gas is provided by the gas supply pipeline 1, the natural gas enters the power generation pipeline 3, the natural gas can enter the expansion machine 5, and the expansion machine 5 utilizes the natural gas with certain pressure to perform adiabatic expansion in the expansion machine 5 to externally apply work so as to consume the internal energy of the gas. At this time, the expander 5 drives the generator 6 to operate to generate electricity. In the above process, the pressure regulating pipeline 2 is subjected to pressure regulating treatment, so that a part of natural gas can enter the recovery pipeline 4 from the pressure regulating pipeline 2, thereby regulating the pressure between the gas supply pipeline 1 and the power generation pipeline 3, reducing the pressure difference between the gas supply pipeline 1 node at the upstream of the power generation pipeline 3 and the recovery pipeline 4 node at the downstream, and performing grid-connected power supply until the power generation assembly is in a stable power generation state. In the process, because the pressure difference between the upstream and the downstream of the power generation pipeline 3 is reduced, the instantaneous flow can be reduced, and the problems of shutdown and the like caused by the failure of the expansion power generation assembly on the power generation pipeline 3 due to the instantaneous large-flow impact can be avoided.
To sum up, the embodiment of the utility model provides a marine natural gas pipe network residual pressure recovery unit, including air supply line 1, pressure regulating pipeline 2, electricity generation pipeline 3 and recovery pipeline 4. The gas supply line 1 is used for supplying natural gas with pressure, so that the natural gas enters the corresponding line. The power generation pipeline 3 is used for realizing the residual pressure power generation of natural gas, and the recovery pipeline 4 is used for recovering the natural gas after power generation is finished. The pressure regulating pipeline 2 realizes the pressure difference regulation of the upstream and downstream pressures of the power generation pipeline 3 by using the residual light, and can avoid the problems of faults, emergency stop and the like caused by the problems of large pressure difference and the like. The air supply line 1 is connected to the recovery line 4, and the pressure-regulating line 2 and the power generation line 3 are connected in parallel between the air supply line 1 and the recovery line 4. The air supply pipeline 1 is connected with the recovery pipeline 4, the pressure regulating pipeline 2 and the power generation pipeline 3 are connected between the air supply pipeline 1 and the recovery pipeline 4 in parallel, at the moment, the pressure regulating pipeline 2 can be subjected to pressure regulating treatment, a part of natural gas can enter the recovery pipeline 4 from the pressure regulating pipeline 2, the pressure between the air supply pipeline 1 and the power generation pipeline 3 is regulated, the pressure difference between the air supply pipeline 1 node at the upstream of the power generation pipeline 3 and the recovery pipeline 4 node at the downstream can be reduced, and grid-connected power supply can be carried out until the power generation assembly is in a stable power generation state. In the process, because the pressure difference between the upstream and the downstream of the power generation pipeline 3 is reduced, the instantaneous flow can be reduced, and the problems of stopping and the like caused by the failure of the expansion power generation assembly on the power generation pipeline 3 due to the instantaneous large-flow impact can be avoided. An expansion power generation module is connected in series to the power generation pipeline 3, a gas inlet end of the expansion power generation module is connected to the gas supply pipeline 1, and a gas outlet end of the expansion power generation module is connected to a recovery pipeline 4. The expansion power generation assembly is a device capable of generating power by using natural gas excess pressure, and is connected in series on a power generation pipeline 3 to effectively generate power by using the excess pressure of natural gas introduced from an air supply pipeline 1. The natural gas after the power generation can enter a recovery pipeline 4 for recovery. The pressure regulating pipeline 2 is connected in series with a first pressure regulating valve 7. The first pressure regulating valve 7 is an intuitive and simple flow rate regulating control device which can reduce the inlet pressure thereof to a certain required outlet pressure by regulation and automatically stabilize the outlet pressure by the energy of the medium itself. At this time, the pressure difference between the two ends of the pressure regulating pipeline 2 is changed through the first pressure regulating valve 7, so that the problems of large change, large fluctuation and the like of the pressure difference between the gas inlet end and the gas outlet end of the expansion power generation assembly can be solved, and the problems of parking and the like caused by the failure of the expansion power generation assembly can be effectively avoided. Therefore, the recovery device for the residual pressure of the offshore natural gas pipe network can utilize the residual pressure of the natural gas pipe network for power generation, the power generation is stably controlled in the starting and speed-up processes of the unit, and when the problems of failure, parking and the like of the expansion power generation unit occur, the power generation unit is timely and emergently turned off to isolate the natural gas flow, so that the phenomenon that the normal gas supply generates large fluctuation due to large-flow impact in the moment is avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The device for recovering the residual pressure of the offshore natural gas pipe network is characterized by comprising an air supply pipeline, a pressure regulating pipeline, a power generation pipeline and a recovery pipeline, wherein the air supply pipeline is connected with the recovery pipeline, and the pressure regulating pipeline and the power generation pipeline are connected in parallel between the air supply pipeline and the recovery pipeline;
an expansion power generation assembly is connected in series on the power generation pipeline, a gas inlet end of the expansion power generation assembly is connected with the gas supply pipeline, and a gas outlet end of the expansion power generation assembly is connected with a recovery pipeline;
and the pressure regulating pipeline is connected with a first pressure regulating valve in series.
2. The offshore natural gas pipe network residual pressure recovery device according to claim 1, wherein a second pressure regulating valve is arranged on the pressure regulating pipeline, and the second pressure regulating valve is connected with the first pressure regulating valve in parallel.
3. The offshore natural gas pipe network residual pressure recovery device of claim 2, wherein the first pressure regulating valve and the second pressure regulating valve are explosion-proof valves.
4. The offshore natural gas pipe network residual pressure recovery device of claim 1, wherein a bypass pipeline is arranged between the gas supply pipeline and the recovery pipeline, and the bypass pipeline and the power generation pipeline are connected between the gas supply pipeline and the recovery pipeline in parallel.
5. The offshore natural gas pipe network residual pressure recovery device of claim 4, wherein a bypass quick-opening valve is connected in series on the bypass pipeline.
6. The offshore natural gas pipe network residual pressure recovery device of claim 1, wherein a loading valve is connected in series on the power generation pipeline, and the loading valve is positioned between the expansion power generation assembly and the gas supply pipeline.
7. The offshore natural gas pipe network residual pressure recovery device of claim 6, wherein an emergency shut-off valve is connected in series to the power generation pipeline, and the emergency shut-off valve is located between the expansion power generation assembly and the recovery pipeline.
8. The offshore natural gas pipe network residual pressure recovery device of claim 7, wherein the gas supply pipe is sequentially connected in series with a master control valve, a filtering separator and a first electric heater, and an outlet end of the first electric heater is communicated with the loading valve.
9. The offshore natural gas pipe network residual pressure recovery device of claim 7, wherein a second electric heater is connected in series to the recovery pipeline, and the second electric heater is communicated with the emergency shut-off valve.
10. The offshore natural gas pipe network residual pressure recovery device of claim 9, wherein a slug flow catcher is further connected in series on the recovery pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221995206.9U CN217481338U (en) | 2022-07-29 | 2022-07-29 | Marine natural gas pipe network residual pressure recovery unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221995206.9U CN217481338U (en) | 2022-07-29 | 2022-07-29 | Marine natural gas pipe network residual pressure recovery unit |
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| CN217481338U true CN217481338U (en) | 2022-09-23 |
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| CN202221995206.9U Active CN217481338U (en) | 2022-07-29 | 2022-07-29 | Marine natural gas pipe network residual pressure recovery unit |
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