CN202417849U - Wellhead natural gas pressure-energy power generation system - Google Patents
Wellhead natural gas pressure-energy power generation system Download PDFInfo
- Publication number
- CN202417849U CN202417849U CN2012200286630U CN201220028663U CN202417849U CN 202417849 U CN202417849 U CN 202417849U CN 2012200286630 U CN2012200286630 U CN 2012200286630U CN 201220028663 U CN201220028663 U CN 201220028663U CN 202417849 U CN202417849 U CN 202417849U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003345 natural gas Substances 0.000 title claims abstract description 20
- 238000010248 power generation Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims description 63
- 239000011435 rock Substances 0.000 claims description 10
- 241000191291 Abies alba Species 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a wellhead natural gas pressure-energy power generation system and a control method. The wellhead natural gas pressure-energy power generation system comprises a natural gas wellhead production tree (1) and is characterized in that an outlet of the natural gas wellhead production tree (1) is connected with one end of a wellhead exhaust pipe (2); the other end of the wellhead exhaust pipe (2) is connected with an inlet or inlets of one or more gas-liquid two-phase rotational flow expanders (3); an outlet of each gas-liquid two-phase rotational flow expander (3) is connected with an outlet pipeline I (5) and the other end of the outlet pipeline I (5) is in parallel connection with the inlet or inlets of one or more second pressure-step gas-liquid two-phase rotational flow expanders (3); the outlet of each second pressure-step gas-liquid two-phase rotational flow expander (3) is connected with one end of an outlet pipeline II (6); the other end of the outlet pipeline II (6) is in parallel connection with the inlet or inlets of one or more third pressure-step gas-liquid two-phase rotational flow expanders (3); the outlet of each third pressure-step gas-liquid two-phase rotational flow expander (3) is connected with one end of an outlet pipeline III (7), and the other end of the outline pipeline III (7) is connected with a control valve (8). The wellhead natural gas pressure-energy power generation system disclosed by the utility model has the beneficial effects of realizing energy saving and emission reduction and improving economic benefit.
Description
Technical field
The utility model belongs to power generating equipment, particularly a kind of well head pressure energy of natural gas power generation system and controlling method.
Background technique
The general blowing mode that adopts when tapping natural gas; A lot of gas fields well head is produced pressure and can be reached more than the 40Mpa, and is 2MPa through the gas transmission line operating pressure of gas gathering station throttling to Gas Purification Factory, and variation in pressure is bigger; From well head to the gathering line process; Pressurized gas reduce through throttle valve adiabatic expansion pressure, and a large amount of fluid mechanical energies is converted into cold energy and is dissipated in the environment, and energy loss is huge.In the decompression process of high-pressure natural gas, reduce because of throttling causes temperature, the icing formation of condensation pipeline ice is stifled easily at low temperatures for the hyrate that water vapour that contains in the rock gas and high pressure form.To solve the stifled mode of ice is the pipeline heating, add particularly mode such as downhole choke of inhibitory agent, emptying step-down.Pipeline has added heat waster rock gas or electric energy adds antifreezing solution in a large number and can cause environmental pollution, and it is stifled that emptying step-down and downhole choke decompression have to a certain degree solved ice, can resource but wasted a large amount of pressure.Common turbo-expander can be used for gas separation and liquefaction in gas exploitation course, purified natural gas also capable of using comprises the coal gas differential pressure power generation, can't realize that anti-stagnant ice is stifled and allow gas band liquid though common turbo-expander can reduce pressure.
Summary of the invention
The objective of the invention is to overcome above-mentioned technical deficiency; Provide a kind of employing gas-liquid two-phase flow decompressor to reduce pressure on ground; Save heating link and inhibitory agent and injected link; Avoid the downhole choke link, utilized the well head pressure energy of natural gas power generation system of well head pressure ability in the gas production process.
The technological scheme that the utility model technical solution problem is adopted is: a kind of well head pressure energy of natural gas power generation system; Comprise rock gas well head christmas tree, generator and control valve; The outlet that it is characterized in that rock gas well head christmas tree is connected with well head outlet pipe one end; The well head outlet pipe the other end is connected with one or more first pressure step gas liquid two-phase whirl decompressor inlets; The outlet of gas liquid two-phase whirl decompressor is connected with export pipeline one; The other end of export pipeline one and one or more second pressure step gas liquid two-phase whirl decompressor inlet are connected in parallel; The outlet of the second pressure step gas liquid two-phase whirl decompressor is connected with an end of export pipeline two, and the inlet of the other end of export pipeline two and one or more the 3rd pressure step gas liquid two-phase whirl decompressors is connected in parallel, and the outlet of the 3rd pressure step gas liquid two-phase whirl decompressor is connected with an end of export pipeline three.The controlling method of well head pressure energy of natural gas power generation system is: the gas discharge in a, the well head outlet pipe is during more than or equal to two times of the volume flows of a gas liquid two-phase whirl decompressor, at a plurality of same model gas liquid two-phase whirl decompressors of well head parallel connection; B, when pressure reduction between gas pressure in the well head outlet pipe and the gas gathering and transportation pipeline during more than or equal to two times of the import and export design pressure difference of gas liquid two-phase whirl decompressor; Can take cascade utilization to pressure; The quantity of next pressure step gas liquid two-phase whirl decompressor is by the expansion ratio decision of a last pressure step gas liquid two-phase whirl decompressor; After the parallel connection of same pressure step same model gas liquid two-phase whirl decompressor; Be connected in series to the inlet of upper level pressure step gas liquid two-phase whirl decompressor, by that analogy, till the outlet pressure of gas liquid two-phase whirl decompressor drops to the required pressure in collector and delivery pipe road.
The beneficial effect of the utility model is that the present invention has compared with prior art improved the utilization ratio of pressure energy of natural gas; Help building distributed power station, can satisfy mining site production need for electricity, also can be incorporated into the power networks and send; Reach energy-saving and emission-reduction, improved economic benefit.
Description of drawings
Below in conjunction with accompanying drawing, specify with embodiment.
Figure is the schematic representation of well head pressure energy of natural gas power generation system and controlling method.
Among the figure: 1-rock gas well head christmas tree; 2-well head outlet pipe; 3-gas liquid two-phase whirl decompressor; The 4-generator; 5-export pipeline one; 6-export pipeline two; 7-export pipeline three; The 8-control valve; 9-gas gathering and transportation pipeline.
Embodiment
Embodiment is with reference to accompanying drawing.A kind of well head pressure energy of natural gas power generation system; Comprise rock gas well head christmas tree 1, generator 4 and control valve 8; The outlet that it is characterized in that rock gas well head christmas tree 1 is connected with an end of well head outlet pipe 2; The other end of well head outlet pipe 2 is connected with one first pressure step gas liquid two-phase whirl decompressor, 3 inlets; The outlet of gas liquid two-phase whirl decompressor 3 is connected with export pipeline 1, and the other end of export pipeline 1 and two second pressure step gas liquid two-phase whirl decompressor 3 inlets are connected in parallel, and the outlet of the second pressure step gas liquid two-phase whirl decompressor 3 is connected with an end of export pipeline 26; The inlet of the other end of export pipeline 26 and four the 3rd pressure step gas liquid two-phase whirl decompressors 3 is connected in parallel, and the outlet of the 3rd pressure step gas liquid two-phase whirl decompressor 3 is connected with an end of export pipeline 37.Export pipeline 37 the other ends connect control valve 8, connect control valve 8 and are connected with gas gathering and transportation pipeline 9; The shaft of each gas liquid two-phase whirl decompressor 3 is connected with the rotor main shaft of generator 4, realizes rotary electrification.The controlling method of well head pressure energy of natural gas power generation system is: the gas discharge in a. well head outlet pipe 2 is during more than or equal to two times of the volume flows of a gas liquid two-phase whirl decompressor 3, at a plurality of same model gas liquid two-phase whirl decompressors 3 of well head parallel connection; B. when pressure reduction between gas pressure in the well head outlet pipe 2 and the gas gathering and transportation pipeline 9 during more than or equal to two times of the import and export design pressure difference of gas liquid two-phase whirl decompressor 3; Can take cascade utilization to pressure; The quantity of next pressure step gas liquid two-phase whirl decompressor 3 is by the expansion ratio decision of a last pressure step gas liquid two-phase whirl decompressor 3; After 3 parallel connections of same pressure step same model gas liquid two-phase whirl decompressor; Be connected in series to the inlet of upper level pressure step gas liquid two-phase whirl decompressor 3, by that analogy, till the outlet pressure of gas liquid two-phase whirl decompressor 3 drops to collector and delivery pipe road 9 required pressure.
The utility model is mainly used in the generating of well head rock gas pressure reduction, also can be used for the natural gas line differential pressure power generation, i.e. energy-saving and emission-reduction have improved economic benefit again.
Claims (1)
1. well head pressure energy of natural gas power generation system; Comprise rock gas well head christmas tree (1), generator (4) and control valve (8); The outlet that it is characterized in that rock gas well head christmas tree (1) is connected with well head outlet pipe (2) one ends; Well head outlet pipe (2) the other end is connected with the one or more first pressure step gas liquid two-phase whirl decompressor (3) inlets; The outlet of gas liquid two-phase whirl decompressor (3) is connected with export pipeline one (5); The other end of export pipeline one (5) and one or more second pressure step gas liquid two-phase whirl decompressor (3) inlet are connected in parallel; The outlet of the second pressure step gas liquid two-phase whirl decompressor (3) is connected with export pipeline two (6) one ends, and export pipeline two (6) the other ends and one or more the 3rd pressure step gas liquid two-phase whirl decompressor (3) inlet are connected in parallel, and the outlet of the 3rd pressure step gas liquid two-phase whirl decompressor (3) is connected with an end of export pipeline three (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200286630U CN202417849U (en) | 2012-01-21 | 2012-01-21 | Wellhead natural gas pressure-energy power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200286630U CN202417849U (en) | 2012-01-21 | 2012-01-21 | Wellhead natural gas pressure-energy power generation system |
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| Publication Number | Publication Date |
|---|---|
| CN202417849U true CN202417849U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200286630U Expired - Fee Related CN202417849U (en) | 2012-01-21 | 2012-01-21 | Wellhead natural gas pressure-energy power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417849U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216278A (en) * | 2012-01-21 | 2013-07-24 | 林牧 | Wellhead natural gas pressure energy power generation system and control method |
| CN103306761A (en) * | 2013-06-27 | 2013-09-18 | 西南石油大学 | Pressure energy power generation system adopting wellhead natural gas |
| 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 |
| CN103968640A (en) * | 2014-05-15 | 2014-08-06 | 碧海舟（北京）石油化工设备有限公司 | Air separation system utilizing natural gas differential pressure power generation cold energy |
| CN104110279A (en) * | 2013-04-19 | 2014-10-22 | 天津大学 | Top-pressure power generation assembly in natural gas valve station and multi-stage power generation system with top-pressure power generation assembly |
| CN103968640B (en) * | 2014-05-15 | 2016-11-30 | 碧海舟（北京）节能环保装备有限公司 | A kind of air-seperation system utilizing natural gas pressure difference generating cold energy |
-
2012
- 2012-01-21 CN CN2012200286630U patent/CN202417849U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216278A (en) * | 2012-01-21 | 2013-07-24 | 林牧 | Wellhead natural gas pressure energy power generation system and control method |
| CN104110279A (en) * | 2013-04-19 | 2014-10-22 | 天津大学 | Top-pressure power generation assembly in natural gas valve station and multi-stage power generation system with top-pressure power generation assembly |
| CN103306761A (en) * | 2013-06-27 | 2013-09-18 | 西南石油大学 | Pressure energy power generation system adopting wellhead natural gas |
| 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 |
| CN103968640A (en) * | 2014-05-15 | 2014-08-06 | 碧海舟（北京）石油化工设备有限公司 | Air separation system utilizing natural gas differential pressure power generation cold energy |
| CN103968640B (en) * | 2014-05-15 | 2016-11-30 | 碧海舟（北京）节能环保装备有限公司 | A kind of air-seperation system utilizing natural gas pressure difference generating cold energy |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20170121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |