CN103306761B - Pressure energy power generation system adopting wellhead natural gas - Google Patents
Pressure energy power generation system adopting wellhead natural gas Download PDFInfo
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- CN103306761B CN103306761B CN201310260259.5A CN201310260259A CN103306761B CN 103306761 B CN103306761 B CN 103306761B CN 201310260259 A CN201310260259 A CN 201310260259A CN 103306761 B CN103306761 B CN 103306761B
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Abstract
The invention relates to a pressure energy power generation system adopting wellhead natural gas, which is used for natural gas wellheads in oil-gas fields. The system mainly comprises a gas well Christmas tree, a pressure regulating valve, a separator, a tube heat exchanger, multi-stage pneumatic motors, a generator, a natural gas pipe line, a pneumatic motor outlet pressure regulating valve and a pollution discharge throttle valve which are connected with one another, wherein the gas well Christmas tree is connected with the pressure regulating valve which is connected with the separator; one outlet of the separator is connected with the pollution discharge throttle valve, and the other outlet is connected with the tube heat exchanger which is connected with a first-stage pneumatic motor of the multi-stage pneumatic motors; the multi-stage pneumatic motors comprise the first-stage pneumatic motor, a second-stage pneumatic motor and a third-stage pneumatic motor which are connected in series; and the third-stage pneumatic motor of the multi-stage pneumatic motors is connected with the pneumatic motor outlet pressure regulating valve; a concentric rotating shaft of the multi-stage pneumatic motors is connected with the generator through the first-stage pneumatic motor. According to the a pressure energy power generation system adopting the wellhead natural gas, the high-pressure natural gas of the Christmas tree is adopted as a gas source, larger economic benefits and electrical quantity can be generated, external electricity grid-connection transmission can be achieved, and the system is environment-friendly.
Description
Technical field
The present invention relates to a kind of well opening natural gas energy power generation system, for the generating of natural gas in oil and gas fields well head, belong to the technical field of new energies utilizing ground Hair Fixer electricity.
Technical background
The well head pressure of rock gas christmas tree is at 10 ~ more than 100MPa, the pressure of well head gathering line distribute natural gas is at about 5MPa, the pressure of user's pipeline is at about 0.4MPa, in this pressure drop processing procedure, voltage regulating station adopts the mode of expenditure and pressure usually, and the pressure energy of rock gas is wasted in throttling process.In fact the energy contained from well head rock gas is out huge, and can be utilized, the economic benefit produced that is used for by this part well head pressure energy generating electricity will be very considerable, moreover can also reduce gas pressure to distribute (or voltage regulating station is required) with appropriate user, the rock gas through the step-down that generates electricity saves processing cost without the need to adding anti-blocking agent.
Based on above-mentioned condition, utilize the new energy technology of the rock gas pressure energy power generation system of well opening natural gas power, the pressure energy of rock gas is directly converted into electric energy by it, both make use of pressure energy of natural gas and again reduce pressure, also can replace a part of fuel gas generation make China's gas (comprising automobile gas), industrial fuel, gas chemical industry richer by gas resource, can realize other facility electricity consumptions of oil gas field and grid-connected outer defeated, not only can produce huge economic benefit again can not to environment.
In the patent of publicity, what some patent adopted being Low-pressure Gas Pipeline pressure and energy that gas pipeline pressure has is limited, some patent for well head pressure does not have again the function of separating treatment rock gas impurity, the angle of the condition that should possess from rock gas self property and pressure drop process designs, consider well head rock gas with impurity shortcoming; Adopt new method, power generation system rock gas pressure energy being directly changed into the running drive electrical generators generating of special pneumatic motor is significant.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, a kind of well opening natural gas energy power generation system is provided, rock gas pressure energy is directly changed into the power generation system of the running drive electrical generators generating of special pneumatic motor, and gas pressure is down to the pressure state that user divides adapted gas (or voltage regulating station required).Because the outlet pressure of gas well christmas tree is very high, pressure is usually at 10 ~ more than 100MPa, and well head pressure is very unstable, this state is unfavorable in the motion speed of pneumatic motor, so first carry out voltage-regulation voltage-stabilization process to rock gas, and christmas tree directly rock gas out contain a large amount of as H
2the impurity such as S, carbohydrate, silt particle, directly enter pneumatic motor and will cause the rapid damage of pneumatic motor, also need to carry out magazins' layout process to it so cross after pressure regulation until natural gas via, consider that high-pressure natural gas has the character of step-down cooling after pneumatic motor, and the gas component after decrease temperature and pressure---hydrocarbon alkane, can dew point be run into, occur the phenomenon of hydrate, so also need the normal operation heating to ensure pneumatic motor to rock gas.
(or voltage regulating station is required) pressure is distributed when rock gas can not drop to user merely through the pressure drop of rock gas during one-level pneumatic motor, High Rotation Speed and the supply moment of torsion of pneumatic motor can not be ensured, so pneumatic motor is divided into Multistage air motor, and make every grade of pneumatic motor enter implication all through heating after just allowance rock gas enter pneumatic motor, under considering the very large situation of some gas well pressure, power generation system can be got involved by organizing Multistage air motor more, being formed and organizing forms of electricity generation more.
Technological scheme of the present invention is: a kind of rock gas pressure energy of the present invention power generation system, connect to form primarily of gas well christmas tree, pressure regulator valve, separator, tubular heat exchanger, Multistage air motor, generator, natural gas line, pneumatic motor outlet pressure regulator valve and blowdown throttle valve, described gas well christmas tree is connected with pressure regulator valve, pressure regulator valve connects separator, separator outlet is run in dirty throttle valve, another discharge connection formula heat exchanger, tubular heat exchanger is connected with the first order pneumatic motor of Multistage air motor; Multistage air motor is composed in series by first order pneumatic motor, second level pneumatic motor and third level pneumatic motor, and third level pneumatic motor and the pneumatic motor of Multistage air motor export pressure regulator valve and be connected; The concentric rotating shafts of Multistage air motor is connected with generator by the axle of first order pneumatic motor.
Rock gas is delivered to pressure regulator valve from gas well christmas tree through gas well outlet line, by pressure regulator valve pressure regulation, arrives separator, be separated into pure rock gas and oil water mixture through separator by separator inlet pipeline.Oil water mixture, processes to blowdown throttle valve by flowing to subordinate through blowdown pipeline after blowdown throttle valve adjustment through separator blowdown pipeline; After tubular heat exchanger heating delivered to by pure natural gas via separator natural gas line, flow to first order pneumatic motor through one-level pneumatic motor suction line, air pressure can discharge for the first time and drive the axle of first order pneumatic motor to rotate; Deliver to tubular heat exchanger by one-level pneumatic motor outlet line after pure natural gas via first order pneumatic motor to heat, enter the second level pneumatic motor acceleration axle concentric with first order pneumatic motor through second stage pneumatic motor inlet pipeline after heating and rotate; Heated to tubular heat exchanger by second stage pneumatic motor outlet pipe flow will after pure natural gas via second level pneumatic motor, again accelerate the axle concentric with first order pneumatic motor rotates through flowing to third level pneumatic motor by three grades of pneumatic motor suction lines after heating, to export through pneumatic motor from pneumatic motor outlet line after pure rock gas flows through third level pneumatic motor and flow through rock gas export pipeline after pressure regulator valve pressure regulation and flow to next stage process.
By the rotating shaft of first order pneumatic motor through second level pneumatic motor, third level pneumatic motor secondary with High Rotation Speed after cadion-acceleration and generator connected in series, drive electrical generators generates electricity, and the electric power of generation transfers to electrical network.
In systems in which when the pure rock gas of outlet carries out under pressure regulation process makes it remain on the pressure state of follow-up needs by pure rock gas after whole pneumatic motor.Wherein, christmas tree rock gas enters subordinate's treatment device at the sewage produced after separating treatment by blowdown pipeline discharge.
Advantage of the present invention and beneficial effect: 1. use the high-pressure natural gas of christmas tree to make source of the gas; 2. employ high-pressure separator; 3. employ tubular heat exchanger; 4. can produce larger electricity and realize good economic benefit; 5. energy electric power is grid-connected outer defeated, environmental protection.
Accompanying drawing explanation
Fig. 1. be the structural representation of a kind of rock gas pressure energy of the present invention power generation system.
In figure: 1. gas well christmas tree, 2. gas well outlet line, 3. pressure regulator valve, 4. separator inlet pipeline, 5. separator, 6. separator blowdown pipeline, 7. blowdown throttle valve, 8. blowdown pipeline, 9. separator natural gas line, 10. one-level pneumatic motor outlet line, 11. second stage pneumatic motor outlet pipelines, 12. 3 grades of pneumatic motor suction lines, 13. third level pneumatic motors, 14. second stage pneumatic motor inlet pipelines, 15. second level pneumatic motors, 16. one-level pneumatic motor suction lines, 17. first order pneumatic motors, 18. tubular heat exchangers, 19. generators, 20. rock gas export pipelines, 21. pneumatic motor outlet pressure regulator valves, 22. pneumatic motor outlet lines.
Embodiment
Below in conjunction with accompanying drawing, technological scheme of the present invention is described specifically:
In FIG, a kind of rock gas pressure energy power generation system, connect to form primarily of gas well christmas tree 1, pressure regulator valve 3, separator 5, tubular heat exchanger 18, Multistage air motor, generator 19, natural gas line, pneumatic motor outlet pressure regulator valve 21 and blowdown throttle valve 7, gas well christmas tree 1 is connected with pressure regulator valve 3, pressure regulator valve 3 connects separator 5, an outlet of separator 5 is run in dirty throttle valve 7, another discharge connection formula heat exchanger 18, tubular heat exchanger 18 is connected with the first order pneumatic motor 17 of Multistage air motor; Multistage air motor is composed in series by first order pneumatic motor 17, second level pneumatic motor 15 and third level pneumatic motor 13, and third level pneumatic motor 13 and the pneumatic motor of Multistage air motor export pressure regulator valve 21 and be connected; The concentric rotating shafts of Multistage air motor is connected with generator 19 by the axle of first order pneumatic motor 17.
Rock gas is delivered to pressure regulator valve 3 from gas well christmas tree 1 through gas well outlet line 2, by pressure regulator valve 3 pressure regulation, arrives separator 5 by separator inlet pipeline 4, is separated into pure rock gas and oil water mixture through separator 5.Oil water mixture, through separator blowdown pipeline 6 to blowdown throttle valve 7, through blowdown pipeline 8 flows to subordinate process after being regulated by blowdown throttle valve 7; After tubular heat exchanger 18 heating delivered to by pure natural gas via separator natural gas line 9, flow to first order pneumatic motor 17 through one-level pneumatic motor suction line 16, air pressure can discharge for the first time and drive the axle of first order pneumatic motor 17 to rotate; Deliver to tubular heat exchanger 18 by one-level pneumatic motor outlet line 10 after pure natural gas via first order pneumatic motor 17 to heat, enter the second level pneumatic motor 15 acceleration axle concentric with first order pneumatic motor 17 through second stage pneumatic motor inlet pipeline 14 after heating and rotate; Flow to tubular heat exchanger 18 by second stage pneumatic motor outlet pipeline 11 after pure natural gas via second level pneumatic motor 15 to heat, again accelerates the axle concentric with first order pneumatic motor 17 rotate through flowing to third level pneumatic motor 13 by three grades of pneumatic motor suction lines 12 after heating, to export through pneumatic motor from pneumatic motor outlet line 22 after pure rock gas flows through third level pneumatic motor 13 and flow through rock gas export pipeline 20 after pressure regulator valve 21 pressure regulation and flow to next stage process.
The rotating shaft of first order pneumatic motor 17 through second level pneumatic motor 15, third level pneumatic motor 13 secondary with High Rotation Speed after cadion-acceleration and generator 19 connected in series, drive electrical generators 19 generates electricity, and the electric power of generation transfers to electrical network.
Claims (2)
1. a well opening natural gas energy power generation system, primarily of gas well christmas tree (1), pressure regulator valve (3), separator (5), tubular heat exchanger (18), Multistage air motor, generator (19), natural gas line, pneumatic motor outlet pressure regulator valve (21) and blowdown throttle valve (7) connect to form, it is characterized in that: described gas well christmas tree (1) is connected with pressure regulator valve (3), pressure regulator valve (3) connects separator (5), an outlet of separator (5) is run in dirty throttle valve (7), another discharge connection formula heat exchanger (18), tubular heat exchanger (18) is connected with the first order pneumatic motor (17) of Multistage air motor, Multistage air motor is composed in series by first order pneumatic motor (17), second level pneumatic motor (15) and third level pneumatic motor (13), and third level pneumatic motor (13) and the pneumatic motor of Multistage air motor export pressure regulator valve (21) and be connected, the concentric rotating shafts of Multistage air motor is connected with generator (19) by the axle of first order pneumatic motor (17), rock gas is delivered to pressure regulator valve (3) from gas well christmas tree (1) through gas well outlet line (2), by pressure regulator valve (3) pressure regulation, arrive separator (5) by separator inlet pipeline (4), be separated into pure rock gas and oil water mixture through separator (5), oil water mixture to blowdown throttle valve (7) through separator blowdown pipeline (6), flows to subordinate through blowdown pipeline (8) after being regulated process by blowdown throttle valve (7), after tubular heat exchanger (18) heating delivered to by pure natural gas via separator natural gas line (9), flow to first order pneumatic motor (17) through one-level pneumatic motor suction line (16), air pressure can discharge for the first time and drive the axle of first order pneumatic motor (17) to rotate, deliver to tubular heat exchanger (18) by one-level pneumatic motor outlet line (10) after pure natural gas via first order pneumatic motor (17) to heat, enter second level pneumatic motor (15) the acceleration axle concentric with first order pneumatic motor (17) through second stage pneumatic motor inlet pipeline (14) after heating and rotate, flow to tubular heat exchanger (18) by second stage pneumatic motor outlet pipeline (11) behind pure natural gas via second level pneumatic motor (15) to heat, again accelerate the axle concentric with first order pneumatic motor (17) rotate through flowing to third level pneumatic motor (13) by three grades of pneumatic motor suction lines (12) after heating, after pneumatic motor outlet pressure regulator valve (21) pressure regulation, flow through rock gas export pipeline (20) from pneumatic motor outlet line (22) after pure rock gas flows through third level pneumatic motor (13) and flow to next stage process.
2. a kind of well opening natural gas energy power generation system according to claim 1, it is characterized in that: the rotating shaft of first order pneumatic motor (17) after the coaxial acceleration of second level pneumatic motor (15), third level pneumatic motor (13) High Rotation Speed and generator (19) connected in series, drive electrical generators (19) generates electricity, and the electric power of generation transfers to electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310260259.5A CN103306761B (en) | 2013-06-27 | 2013-06-27 | Pressure energy power generation system adopting wellhead natural gas |
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| CN201310260259.5A CN103306761B (en) | 2013-06-27 | 2013-06-27 | Pressure energy power generation system adopting wellhead natural gas |
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| CN103306761B true CN103306761B (en) | 2015-01-07 |
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| CN103775026A (en) * | 2014-01-16 | 2014-05-07 | 中国石油化工股份有限公司 | Self-generating electric heat tracing device for natural gas well |
| CN104018901B (en) * | 2014-06-12 | 2015-07-08 | 中节能工业节能有限公司 | Natural gas, pressure energy and cold energy combined power generation system |
| CN116428034A (en) * | 2023-05-06 | 2023-07-14 | 西南石油大学 | High-pressure gas well pressure energy and geothermal energy combined utilization device and method thereof |
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| RO103395B1 (en) * | 1988-05-18 | 1993-11-09 | Schela De Productie Petroliera | Electrical energy production device |
| CN2755288Y (en) * | 2004-11-03 | 2006-02-01 | 上海工程技术大学 | Combined generator by natural gas transmission and distribution line differential pressure |
| CN101943323A (en) * | 2009-07-07 | 2011-01-12 | 王飙 | Natural gas pressure difference energy recovery process |
| CN101943033A (en) * | 2010-08-11 | 2011-01-12 | 重庆市开县康百佳中药保健食品研究所 | Natural gas pipeline air flow gravitational force driving generation system |
| CN202325702U (en) * | 2011-11-17 | 2012-07-11 | 重庆川然节能技术有限公司 | Natural gas pressure difference power generation system self-adapting to rear-end load change |
| CN202417849U (en) * | 2012-01-21 | 2012-09-05 | 林牧 | Wellhead natural gas pressure-energy power generation system |
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