CN217899494U - Lubricating oil station system for natural gas excess pressure power generation - Google Patents
Lubricating oil station system for natural gas excess pressure power generation Download PDFInfo
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- CN217899494U CN217899494U CN202222310504.6U CN202222310504U CN217899494U CN 217899494 U CN217899494 U CN 217899494U CN 202222310504 U CN202222310504 U CN 202222310504U CN 217899494 U CN217899494 U CN 217899494U
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Abstract
The utility model relates to a lubricating oil station technical field for natural gas excess pressure electricity generation provides a lubricating oil station system for natural gas excess pressure electricity generation, includes at least: an oil storage tank; the shaft head pump is suitable for being connected with an output shaft of a rotating machine in a natural gas residual pressure power generation system, and an oil inlet of the shaft head pump is communicated with the oil storage tank; the hot side inlet of the heat exchanger is communicated with the oil outlet of the spindle head pump, and the hot side outlet of the heat exchanger is suitable for being communicated with the oil inlet of a rotary machine in a natural gas residual pressure power generation system; a cold side inlet of the heat exchanger is suitable for being connected with an air outlet of a rotating machine in the natural gas residual pressure power generation system, and a cold side outlet of the heat exchanger is suitable for being connected with an external natural gas transmission pipeline. Compared with the prior art, the system does not need to be provided with water circulation cooling, reduces the consumption of cooling water and electric energy, and reduces equipment and engineering investment.
Description
Technical Field
The utility model relates to a lubricating oil station technical field for natural gas excess pressure electricity generation, concretely relates to lubricating oil station system for natural gas excess pressure electricity generation.
Background
At present, pressure regulating valves are adopted for most of natural gas long-distance pipeline pressure regulating stations and gas burning valve stations to directly reduce pressure, and a large amount of energy is lost. With the continuous development of the technology in recent years, the natural gas residual pressure power generation technology is gradually mature and begins to be applied to a pressure regulating station. Since a rotating machine such as a high-efficiency rotating machine, which is a key device in the residual pressure power generation, needs to be supplied with lubricating oil. The lubricating oil will carry heat away from the equipment during operation and the temperature of the lubricating oil will rise continuously.
The existing lubricating oil station system for natural gas excess pressure power generation adopts water circulation cooling when cooling lubricating oil, the medium of the water circulation cooling is circulating water, power is a circulating water pump, the circulating water is consumed while electric energy is consumed, and equipment and engineering investment is increased.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in adopting water circulative cooling when the lubricating oil station system for natural gas excess pressure electricity generation among the prior art is cooled to lubricating oil, and water circulative cooling's medium is the circulating water, and power is circulating water pump, and the consumption electric energy still need consume the circulating water simultaneously, and has increased equipment and engineering investment to a lubricating oil station system for natural gas excess pressure electricity generation is provided.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a lube station system for natural gas residue pressure power generation comprising at least: an oil reservoir adapted to store lubricating oil for cooling; the shaft head pump is suitable for being connected with an output shaft of a rotating machine in a natural gas residual pressure power generation system, and an oil inlet of the shaft head pump is communicated with the oil storage tank; the hot side inlet of the heat exchanger is communicated with the oil outlet of the spindle head pump, and the hot side outlet of the heat exchanger is suitable for being communicated with the oil inlet of a rotary machine in a natural gas residual pressure power generation system; and a cold side inlet of the heat exchanger is suitable for being connected with an air outlet of a rotating machine in the natural gas residual pressure power generation system, and a cold side outlet of the heat exchanger is suitable for being connected with an external natural gas transmission pipeline.
Further, this a lubricating oil station system for natural gas excess pressure electricity generation still includes electronic variable frequency pump, electronic variable frequency pump's oil inlet with the batch oil tank is linked together, electronic variable frequency pump's oil-out with the hot side entry of heat exchanger is linked together.
Further, a first filter is arranged in the oil storage tank; the first filter is connected with an oil inlet of the electric variable frequency pump through a pipeline.
Further, a first magnetic suction piece is arranged in the oil storage tank; the first magnetic suction piece is located below an oil inlet of the first filter and is suitable for adsorbing iron chips in lubricating oil to be fed into the first filter.
Further, a second filter is arranged in the oil storage tank; the second filter is connected with an oil inlet of the spindle head pump through a pipeline.
Further, a second magnetic suction piece is arranged in the oil storage tank; the second magnetic part is located below the oil inlet of the second filter and is suitable for adsorbing scrap iron in lubricating oil to be fed into the second filter.
Furthermore, a first one-way valve is arranged on a pipeline between an oil outlet of the electric variable frequency pump and a hot side inlet of the heat exchanger; and a second one-way valve is arranged on a pipeline between the oil outlet of the shaft head pump and the hot side inlet of the heat exchanger.
Further, the lubricating oil station system for natural gas residual pressure power generation also comprises a third filter; an oil inlet of the third filter is connected with an outlet at the hot side of the heat exchanger, and an oil outlet of the third filter is respectively communicated with the oil storage tank and an oil inlet of the rotary machine.
Further, a first regulating valve is arranged on a pipeline between the oil outlet of the third filter and the oil storage tank.
Further, the lubricating oil station system for natural gas residual pressure power generation also comprises a second regulating valve which is arranged on a natural gas conveying pipeline connected with the cold side outlet of the heat exchanger.
The utility model discloses technical scheme has following advantage:
the utility model provides a lubricating oil station system for natural gas excess pressure electricity generation utilizes rotary machine drive spindle nose pump to carry the lubricating oil in the oil storage tank to the heat exchanger, utilizes the low temperature natural gas in the natural gas excess pressure electricity generation system as the cold source to cool down lubricating oil in the heat exchanger; compared with the prior art, the water circulation cooling is not needed, the consumption of cooling water and electric energy is reduced, and the equipment and engineering investment is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a lubricating oil station system for natural gas excess pressure power generation in an embodiment of the present invention.
1. A first filter; 2. A second filter; 3. An electric variable frequency pump;
4. a first check valve; 5. A heat exchanger; 6. A third filter;
7. a first regulating valve; 8. A rotating machine; 9. A spindle head pump;
10. a second check valve; 11. A first magnetic attraction piece; 12. A second magnetic attraction member;
13. a generator; 14. A second regulating valve; 15. An oil storage tank.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic diagram of a lubricating oil station system for natural gas excess pressure power generation in an embodiment of the present invention; as shown in fig. 1, the present embodiment provides a lubricating oil station system for natural gas excess pressure power generation, which at least includes: an oil reservoir 15 adapted to store lubricating oil for cooling; the shaft head pump 9 is suitable for being connected with an output shaft of a rotating machine 8 in a natural gas excess pressure power generation system, and an oil inlet of the shaft head pump 9 is communicated with the oil storage tank 15; a hot side inlet of the heat exchanger 5 is communicated with an oil outlet of the spindle head pump 9, and a hot side outlet of the heat exchanger 5 is suitable for being communicated with an oil inlet of a rotary machine 8 in the natural gas residual pressure power generation system; and a cold side inlet of the heat exchanger 5 is suitable for being connected with an air outlet of a rotating machine 8 in the natural gas residual pressure power generation system, and a cold side outlet of the heat exchanger 5 is suitable for being connected with an external natural gas pipeline. The rotating machine 8 may include components such as an expander, a gear box, and a coupling.
In the lubricating oil station system for natural gas excess pressure power generation provided by the embodiment, the spindle head pump 9 is driven by the rotary machine 8 to convey lubricating oil in the oil storage tank 15 to the heat exchanger 5, and low-temperature natural gas in the natural gas excess pressure power generation system is used as a cold source in the heat exchanger 5 to cool the lubricating oil; compared with the prior art, the water circulation cooling is not needed, the consumption of cooling water and electric energy is reduced, and the equipment and engineering investment is reduced.
The lubricating oil station system for natural gas residual pressure power generation further comprises an electric variable frequency pump 3, an oil inlet of the electric variable frequency pump 3 is communicated with the oil storage tank 15, and an oil outlet of the electric variable frequency pump 3 is communicated with a hot side inlet of the heat exchanger 5.
Wherein, a first filter 1 is arranged in the oil storage tank 15; the first filter 1 is connected with an oil inlet of the electric variable frequency pump 3 through a pipeline.
Wherein, a first magnetic attraction piece 11 is arranged in the oil storage tank 15; the first magnetic suction piece 11 is located below an oil inlet of the first filter 1 and is suitable for adsorbing iron chips in lubricating oil to be fed into the first filter 1. The first magnetic attraction piece 11 and the second magnetic attraction piece 12 can be made of magnetic materials such as magnets or electromagnets.
Wherein the oil storage tank 15 is provided with a second filter 2; the second filter 2 is connected with an oil inlet of the spindle head pump 9 through a pipeline.
Wherein, a second magnetic attraction piece 12 is arranged in the oil storage tank 15; the second magnetic attraction piece 12 is located below an oil inlet of the second filter 2 and is suitable for adsorbing iron chips in lubricating oil to be fed into the second filter 2.
A first one-way valve 4 is arranged on a pipeline between an oil outlet of the electric variable frequency pump 3 and a hot side inlet of the heat exchanger 5; and a second one-way valve 10 is arranged on a pipeline between the oil outlet of the spindle head pump 9 and the hot side inlet of the heat exchanger 5.
The lubricating oil station system for natural gas excess pressure power generation further comprises a third filter 6; an oil inlet of the third filter 6 is connected with an outlet at the hot side of the heat exchanger 5, and an oil outlet of the third filter 6 is respectively communicated with an oil inlet of the oil storage tank 15 and an oil inlet of the rotary machine 8.
Wherein, a first regulating valve 7 is arranged on a pipeline between the oil outlet of the third filter 6 and the oil storage tank 15.
The lubricating oil station system for natural gas residual pressure power generation further comprises a second regulating valve 14, wherein the second regulating valve is arranged on a natural gas conveying pipeline connected with a cold side outlet of the heat exchanger 5. The opening degree of the second regulating valve 14 can be changed according to the flow rate of the lubricating oil in the heat exchanger 5, and the larger the flow rate of the lubricating oil in the heat exchanger 5 is, the higher the temperature is, the larger the opening degree of the second regulating valve 14 is, so as to improve the cooling effect.
As the heat exchanger 5, a plate-fin heat exchanger or a shell-and-tube heat exchanger may be used.
As the first and second regulating valves 7 and 14, a pneumatic regulating valve, a hydraulic regulating valve, or an electric regulating valve may be used. If the site is provided with a public air source or a hydraulic oil station, a pneumatic or hydraulic valve can be adopted, and if the site basic conditions are poor, an electric regulating valve can be adopted, and 24V or 220V power supply is adopted.
The cold source for cooling lubricating oil is a working medium generated by residual pressure expansion, and can be natural gas, air or halogenated hydrocarbon gas.
Wherein, first magnetism is inhaled a 11 and is inhaled piece 12 with the second magnetism and all can set up in the bottom of oil storage tank 15, and first magnetism is inhaled and is left certain interval between 11 and the first filter 1, and in the same way, second magnetism is inhaled and is left certain interval between 12 and the second filter 2 to the suction of lubricating oil.
Wherein, a pressure sensor, a temperature sensor and a differential pressure sensor can be installed in a pipeline for conveying lubricating oil. The pressure sensor, the temperature sensor and the differential pressure sensor are in signal connection with the control system, and automatic control is achieved by the control system. When the system is started, the electric variable frequency pump 3 is adopted to output power, and when the system runs stably, the shaft head pump 9 is completely adopted to output power; when the shaft head pump 9 is in failure and stops and the output power is insufficient, the control system controls the first regulating valve 7 and the electric variable frequency pump 3 to change the output power so as to maintain the oil pressure to be stable.
Wherein, the output shaft of the rotating machinery 8 is also connected with a generator 13, and the pressure energy in the natural gas is utilized to generate electricity; the gas inlet of the rotating machinery 8 is connected to a source of recovered gas to provide the high pressure natural gas required for expansion.
The system starts operation:
lubricating oil gets into from first filter 1, passes through first magnetism and inhales the iron fillings in the piece with oil before getting into. The filtered lubricating oil enters an electric frequency modulation pump for pressurization and then enters a heat exchanger 5 through a first one-way valve 4. The temperature of the low-temperature natural gas working medium which is used as a heat source in the heat exchanger 5 and is expanded by natural gas residual pressure is reduced. The cooled lubricating oil enters a third filter 6 to further filter impurities, and then is divided into two paths, wherein one path enters a rotating machine 8 to take away heat generated by the rotating machine 8 due to rotating friction and play a role in lubrication; the other flow passes through the first control valve 7 and flows back to the oil reservoir 15. When the rotary machine 8 operates, the spindle head pump 9 is driven to operate, lubricating oil in the oil storage tank 15 is filtered by the second filter 2 and then is extracted by the spindle head pump 9, and the pressurized lubricating oil passes through the second check valve 10 and then is converged with a pipeline behind the first check valve 4, and then is cooled in the heat exchanger 5.
The control system acquires pressure and temperature signals in the system and operation parameters of the rotating machinery 8 in real time through the pressure sensor, the temperature sensor and the differential pressure sensor. When starting, the electric variable frequency pump 3 is adopted for supplying oil; when the rotary machine 8 reaches the set operation condition, the control system sends an instruction to supply oil to the spindle head pump 9, so that the spindle head pump 9 is kept working normally, and the output of the electric variable frequency pump 3 is gradually reduced until the electric variable frequency pump stops working completely. The control system detects the oil pressure of the circulating oil system and the running state of the spindle head pump 9 in real time, and adjusts the running states of the first adjusting valve 7, the second adjusting valve 14 and the electric variable frequency pump 3 in real time according to the detection result.
In conclusion, the lubricating oil station system for natural gas excess pressure power generation in the application can realize ultralow energy consumption operation of the lubricating oil station. The variable frequency pump is started only when the operation is started and the equipment is in failure, and the shaft head pump 9 is utilized to work when the operation is stable. Compared with the traditional lubricating oil station, the energy consumption is reduced, and the system benefit is improved.
The lubricating oil station system for natural gas excess pressure power generation in the application can realize the high-temperature oil cooling process without energy consumption. The heat exchanger 5 exchanges heat with the low-temperature gas after natural gas excess pressure expansion, so that the temperature of the lubricating oil is reduced, a cooling water circulation system is reduced, and the complexity and the investment cost of the system are reduced.
A lubricating oil station system for natural gas excess pressure electricity generation in this application is provided with control system, and actuating mechanism can realize the more accurate stable control to the oil pressure including first governing valve 7, second governing valve 14, electronic inverter pump 3, pressure sensor, temperature sensor and differential pressure sensor etc..
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A lube station system for natural gas residue pressure power generation, comprising at least:
an oil reservoir adapted to store lubricating oil for cooling;
the shaft head pump is suitable for being connected with an output shaft of a rotating machine in a natural gas residual pressure power generation system, and an oil inlet of the shaft head pump is communicated with the oil storage tank;
the hot side inlet of the heat exchanger is communicated with the oil outlet of the spindle head pump, and the hot side outlet of the heat exchanger is suitable for being communicated with the oil inlet of a rotary machine in a natural gas residual pressure power generation system; and a cold side inlet of the heat exchanger is suitable for being connected with an air outlet of a rotating machine in the natural gas residual pressure power generation system, and a cold side outlet of the heat exchanger is suitable for being connected with an external natural gas pipeline.
2. The lube station system for natural gas over-pressure power generation according to claim 1,
the oil inlet of the electric variable frequency pump is communicated with the oil storage tank, and the oil outlet of the electric variable frequency pump is communicated with the hot side inlet of the heat exchanger.
3. The lube station system for natural gas over-pressure power generation according to claim 2,
a first filter is arranged in the oil storage tank;
the first filter is connected with an oil inlet of the electric variable frequency pump through a pipeline.
4. The lube station system for natural gas over-pressure power generation according to claim 3,
a first magnetic attraction piece is arranged in the oil storage tank;
the first magnetic suction piece is located below the oil inlet of the first filter and is suitable for adsorbing iron chips in lubricating oil to be fed into the first filter.
5. The lube station system for power generation with natural gas under pressure of claim 1,
a second filter is arranged in the oil storage tank;
the second filter is connected with an oil inlet of the spindle head pump through a pipeline.
6. The lube station system for natural gas over-pressure power generation according to claim 5,
a second magnetic attraction piece is arranged in the oil storage tank;
the second magnetic part is located below the oil inlet of the second filter and is suitable for adsorbing scrap iron in lubricating oil to be fed into the second filter.
7. The lube station system for natural gas over-pressure power generation according to claim 2,
a first one-way valve is arranged on a pipeline between an oil outlet of the electric variable frequency pump and a hot side inlet of the heat exchanger;
and a second one-way valve is arranged on a pipeline between the oil outlet of the shaft head pump and the hot side inlet of the heat exchanger.
8. The lube station system for natural gas over-pressure power generation according to claim 1,
a third filter is also included;
an oil inlet of the third filter is connected with an outlet at the hot side of the heat exchanger, and an oil outlet of the third filter is respectively communicated with the oil storage tank and an oil inlet of the rotary machine.
9. The lube station system for power generation with natural gas under pressure of claim 8,
and a first regulating valve is arranged on a pipeline between an oil outlet of the third filter and the oil storage tank.
10. The lube station system for power generation with natural gas under pressure of claim 1,
the heat exchanger also comprises a second regulating valve which is arranged on a natural gas transmission pipeline connected with the cold side outlet of the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222310504.6U CN217899494U (en) | 2022-08-31 | 2022-08-31 | Lubricating oil station system for natural gas excess pressure power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222310504.6U CN217899494U (en) | 2022-08-31 | 2022-08-31 | Lubricating oil station system for natural gas excess pressure power generation |
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| Publication Number | Publication Date |
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| CN217899494U true CN217899494U (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222310504.6U Active CN217899494U (en) | 2022-08-31 | 2022-08-31 | Lubricating oil station system for natural gas excess pressure power generation |
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| CN (1) | CN217899494U (en) |
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- 2022-08-31 CN CN202222310504.6U patent/CN217899494U/en active Active
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