CN204141934U - A kind of system reclaiming mixed hydrocarbon from well site natural gas - Google Patents
A kind of system reclaiming mixed hydrocarbon from well site natural gas Download PDFInfo
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- CN204141934U CN204141934U CN201420394325.8U CN201420394325U CN204141934U CN 204141934 U CN204141934 U CN 204141934U CN 201420394325 U CN201420394325 U CN 201420394325U CN 204141934 U CN204141934 U CN 204141934U
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Abstract
The utility model belongs to natural gas field, be specifically related to a kind of system reclaiming mixed hydrocarbon from well site natural gas, comprise and be separated compress cell, Distillation recovery unit, can extensive use at home remote well site gas, drop a hint, the recovery of website associated gas has good economic benefit and social benefit; HYSYS software carries out sunykatuib analysis and has to built cryogenic system of maybe building design reference value such as adjusting parameter, Optimal Parameters, raising productive rate, reduction energy consumption in real time.
Description
Technical field
The utility model belongs to natural gas field, is specifically related to a kind of system reclaiming mixed hydrocarbon from well site natural gas.
Background technology
Except containing except methane in the associated gas of well site, containing a certain amount of ethane, propane, butane, pentane and more heavy hydrocarbons.For meeting commercial natural gas quality index or pipe gas transmission to the quality requirement of hydrocarbon dew point, or for obtaining valuable liquid fuel and industrial chemicals, the hydro carbons in natural gas need be separated according to certain requirement and reclaim.
More domestic natural gas well sites, existence power supply, water facilities do not catch up with, therefore are not suitable for building large-scale natural gas treating apparatus, are more suitable for building some mixed hydrocarbon retracting devices that are miniaturized and sledge dressization.Do not study this technique due to domestic at present, mixed hydrocarbon recovery system also lacks knowwhy as support.
Mixed hydrocarbon recovery process is fully reclaimed by the gas component of more than C3, the gas reducing liquid be recovered to or direct as commodity, or be separated into ethane, liquefied petroleum gas (LPG) further according to related products quality index, also can be the mixture of propane, butane) and the product such as natural gasoline (more than C5).
Summary of the invention
The purpose of this utility model is to provide a kind of system reclaiming mixed hydrocarbon from well site natural gas, and this mixed hydrocarbon recovery process method is reclaimed by above to the propane in natural gas, butane etc. heavy hydrocarbon.
The utility model provides a kind of system reclaiming mixed hydrocarbon from well site natural gas for this reason, comprises and is separated compress cell, Distillation recovery unit,
1) compress cell is separated: comprise the gas-liquid separator, heat exchanger one, compressor one, cooler one, compressor two, cooler two, the mole sieve drier that are connected by pipeline successively, described mole sieve drier gas vent is connected in the import of heat exchanger one heating tube, the outlet of heat exchanger one heating tube connects heat exchanger two choke valve, cold catch pot successively, described heat exchanger two import connects cold catch pot top, and described heat exchanger two exports and connects outlet pipe;
2) Distillation recovery unit: comprise dethanizer, described Deethanizer bottom connects balancer, and described balancer connects outlet pipe.
Described dethanizer top attachment, in gas-liquid separator bottom, is also provided with circulator between described dethanizer and gas-liquid separator.
Described heat exchanger one, heat exchanger two are plate-fin heat exchanger.
The beneficial effects of the utility model are: this kind of system reclaiming mixed hydrocarbon from well site natural gas that the utility model provides, comprise and be separated compress cell, Distillation recovery unit, can extensive use at home remote well site gas, drop a hint, the recovery of website associated gas has good economic benefit and social benefit; HYSYS software carries out sunykatuib analysis and has to built cryogenic system of maybe building design reference value such as adjusting parameter, Optimal Parameters, raising productive rate, reduction energy consumption in real time.
Below in conjunction with embodiment accompanying drawing, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment schematic diagram reclaiming the system of mixed hydrocarbon from well site natural gas;
In figure: 1, unstripped gas; 2, gas-liquid separator; 3, heat exchanger one; 4, compressor one; 5, cooler one; 6, compressor two; 7, cooler two; 8, mole sieve drier; 9, balancer; 10, dethanizer; 11, cold catch pot; 12, choke valve; 13, heat exchanger two; 14, circulator.
Detailed description of the invention
Embodiment 1:
A kind of system reclaiming mixed hydrocarbon from well site natural gas as shown in Figure 1, comprises and is separated compress cell, Distillation recovery unit, it is characterized in that:
1) compress cell is separated: comprise the gas-liquid separator 2, heat exchanger 1, compressor 1, cooler 1, compressor 26, cooler 27, the mole sieve drier 8 that are connected by pipeline successively, described mole sieve drier 8 gas vent is connected in the import of heat exchanger 1 heating tube, the outlet of heat exchanger 1 heating tube connects heat exchanger 2 13 choke valve 12, cold catch pot 11 successively, described heat exchanger 2 13 import connects cold catch pot 11 top, and described heat exchanger 2 13 exports and connects outlet pipe;
2) Distillation recovery unit: comprise dethanizer 10, described dethanizer 10 top connects with bottom cold catch pot 11, connects balancer 9 bottom described dethanizer 10, and described balancer 9 connects outlet pipe.
Described dethanizer 10 top attachment, in gas-liquid separator 2 bottom, is also provided with circulator 14 between described dethanizer 10 and gas-liquid separator 2.
Described heat exchanger 1, heat exchanger 2 13 are plate-fin heat exchanger.
Reclaim a method for mixed hydrocarbon from well site natural gas, comprise the following steps:
1) under normal temperature and pressure, first unstripped gas 1 enters gas-liquid separator 2 top, removes moisture wherein and impurity; After unstripped gas 1 reaches gas-liquid phase equilibrium in gas-liquid separator 2, isolated partial gas phase enters heat exchanger 1, compressor 1, cooler 1, compressor 26 successively from gas-liquid separator 2 top, cooler 27, final temperature reaches 40 ~ 45 DEG C, pressure 4.7 ~ 4.9MPa; Enter the free water that unstripped gas (1) the inside taken off by mole sieve drier 8;
2) unstripped gas 1 after supercharging and dehydration, return heat exchanger 1 again and provide heat to unstripped gas 1, temperature reaches 20 ~ 25 DEG C, pressure reaches 4.5 ~ 4.8MPa, enter heat exchanger 2 13 to be again cooled to-60 ~-65 DEG C and to enter choke valve 12, choke valve 12 forms local contraction at gas throttling place, such that flow velocity increases, temperature and pressure reduces, and is cooled to-70 ~-74 DEG C and enters cold catch pot 11 and carry out low-flash;
Gas-liquid separator (2) operating temperature 17 ~ 18 DEG C, pressure 1.4 ~ 1.6MPa;
3) unstripped gas 1 temperature-70 ~-75 DEG C after flash distillation, pressure 3.5 ~ 3.8MPa enters dethanizer 10 from cold catch pot 11 bottom; Downstream is transported to as outside product in dethanizer 10 bottom;
In dethanizer 10 tower, in reboiler, the molar fraction of ethane controls 5% ~ 15%, distillation operation pressure 1.5 ~ 1.7MPa in dethanizer 10 tower, temperature 65 ~ 70 DEG C.
Described cold catch pot 11 top gas temperature-70 ~-75 DEG C out, pressure 3.5 ~ 4.0MPa, after entering heat exchanger 2 13 heat exchange, temperature reduces to 15 ~ 20 DEG C, transports to downstream outside pressure 3.5 ~ 4.0MPa.
This kind of system reclaiming mixed hydrocarbon from well site natural gas provided by the invention, can extensive use at home remote well site gas, drop a hint, the recovery of website associated gas has good economic benefit and social benefit.
First gas-liquid separator 2 is entered from outlying well head unstripped gas 1 out under normal temperature and pressure, reach gas-liquid phase equilibrium in gas-liquid separator 2 after, cutting out partial gas phase (temperature 17.8 DEG C, pressure 1.5MPa), enter plate-fin heat exchanger 1, stream temperature 38 DEG C after heat exchange, pressure 1.49MPa, enter compressor 1 to compress, compress stream temperature 85.3 DEG C, pressure 2.42MPa, enter cooler 1 again to cool, stream temperature 40 DEG C after cooling, pressure 2.4MPa, enter compressor 26 again to compress, stream temperature 109 DEG C after second-compressed, pressure 4.8MPa, enter cooler 27 again to cool, stream temperature 40 DEG C after cooling twice, pressure 4.8MPa, then enter mole sieve drier 8 and take off free water inside natural gas, Returning plate fin heat exchanger 1 provides heat to unstripped gas 1 temperature, out stream temperature 21.6 DEG C, pressure 4.78MPa, enter plate-fin heat exchanger 2 13 to be again cooled to-65 DEG C and to enter choke valve 12 again, choke valve 12 forms local contraction at gas throttling place, make flow velocity increase temperature and pressure to reduce, be cooled to-73.8 DEG C.Natural gas after throttling enters cold catch pot 11 and carries out low-flash.
Flash distillation is that gas phase and liquid phase enter vessel space, and under certain pressure and temperature, gas-liquid two-phase is separated rapidly.Stream temperature after flash distillation-73.8 DEG C, pressure 3.8MPa,
Enter dethanizer 10, in dethanizer, in reboiler, the molar fraction of ethane controls 5% ~ 15%, in dethanizer, rectifying Stress control is at 1.5MPa ~ 1.52MPa, in tower, temperature controls at 67.4 DEG C, mixed hydrocarbon obtains major part and reclaims, be 0.78MPa at the saturated vapor of mixed hydrocarbon is pressed in 37.8 DEG C after measured, meet the requirement of liquefied natural gas specification, outside balancer 9, transport to downstream.(code requirement product mixes hydrocarbon saturated vapor pressure≤1.6MPa, normal pressure water dew point≤-60 DEG C).
Dethanizer 10 top gaseous stream temperature-58.1 DEG C out, pressure 1.5MPa turns back to separator 2 through circulator 14; The isolated water of gas-liquid separator 2 is discharged by bottom.
After cold catch pot 11 top gaseous stream temperature out (-70 ~-75 DEG C, pressure 3.5 ~ 4.0MPa) enters heat exchanger 13 re-heat, outside stream temperature (15 ~ 20 DEG C, pressure 3.5 ~ 4.0MPa), transport to downstream.
The water that mole sieve drier 8 is deviate from is discharged by bottom.
Table 1 is that mixed hydrocarbon reclaims product component table; Table 2 is outer defeated dry gas component tables.
Table 1 mixes hydrocarbon and reclaims product component table
| Component | CH4 | C2H6 | C3H8 | iC4 | nC4 | iC5 | nC5 | CO2 | N2 |
| Mark | 0 | 0.1 | 0.2084 | 0.3356 | 0.0053 | 0.0072 | 0.2312 | 0 | 0 |
The outer defeated dry gas component table of table 2
| Component | CH4 | C2H6 | C3H8 | iC4 | nC4 | iC5 | nC5 | CO2 | N2 |
| Mark | 0.9157 | 0.022 | 0.0017 | 0.0008 | 0.0001 | 0 | 0 | 0 | 0 |
It can be seen from the table in the mixed hydrocarbon product reclaimed, component more than propane is 78.77%, and in outer defeated dry gas, total component of methane, ethane is 93.77%, and the above component recovery of propane is high.
By analyzing the gas component in outlying well site, propose the systems approach that a kind of mixed hydrocarbon reclaims.HYSYS software famous is in the world adopted to carry out sunykatuib analysis research, show after research: the mixed hydrocarbon product (saturated vapor pressure≤1.6MPa adopting this system to obtain, mixed hydrocarbon normal pressure water dew point≤-60 DEG C) meet code requirement, the mixed hydrocarbon recovering system researched and proposed according to different station, can adapt to different source of the gas.This mixed hydrocarbon recovery system can extensive use at home remote well site gas, drop a hint, the recovery of website associated gas has good economic benefit and social benefit.
Claims (3)
1. reclaim a system for mixed hydrocarbon from well site natural gas, comprise and be separated compress cell, Distillation recovery unit, it is characterized in that:
Be separated compress cell: comprise the gas-liquid separator (2) connected by pipeline successively, heat exchanger one (3), compressor one (4), cooler one (5), compressor two (6), cooler two (7), mole sieve drier (8), described mole sieve drier (8) gas vent is connected in heat exchanger one (3) heating tube import, the outlet of heat exchanger one (3) heating tube connects heat exchanger two (13) choke valve (12) successively, cold catch pot (11), described heat exchanger two (13) import connects cold catch pot (11) top, described heat exchanger two (13) exports and connects outlet pipe,
Distillation recovery unit: comprise dethanizer (10), described dethanizer (10) top connects with cold catch pot (11) bottom, and described dethanizer (10) bottom connects balancer (9), and described balancer (9) connects outlet pipe.
2. a kind of system reclaiming mixed hydrocarbon from well site natural gas as claimed in claim 1, it is characterized in that: described dethanizer (10) top attachment, in gas-liquid separator (2) bottom, is also provided with circulator (14) between described dethanizer (10) and gas-liquid separator (2).
3. a kind of system reclaiming mixed hydrocarbon from well site natural gas as claimed in claim 1, is characterized in that: described heat exchanger one (3), heat exchanger two (13) are plate-fin heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420394325.8U CN204141934U (en) | 2014-07-17 | 2014-07-17 | A kind of system reclaiming mixed hydrocarbon from well site natural gas |
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| CN201420394325.8U CN204141934U (en) | 2014-07-17 | 2014-07-17 | A kind of system reclaiming mixed hydrocarbon from well site natural gas |
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| CN204141934U true CN204141934U (en) | 2015-02-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104132504A (en) * | 2014-07-17 | 2014-11-05 | 西安长庆科技工程有限责任公司 | System and method for recycling mixed hydrocarbon from well site natural gas |
| CN104964517A (en) * | 2015-05-25 | 2015-10-07 | 西安长庆科技工程有限责任公司 | Ultralow temperature middle and low pressure nitrogen removal method of petroleum associated gas recovery LNG/LPG/NGL product |
| CN105038882A (en) * | 2015-05-29 | 2015-11-11 | 西安长庆科技工程有限责任公司 | Comprehensive fine dewatering technique for recovering LNG/LPG/NGL (liquefied natural gas/liquefied petroleum gas/natural gas liquid) product from saturated hydrous petroleum associated gas |
| CN106147905A (en) * | 2016-08-12 | 2016-11-23 | 天津市振津石油天然气工程有限公司 | Miniature movable type skid light ends unit |
| CN106595223A (en) * | 2016-11-22 | 2017-04-26 | 西安长庆科技工程有限责任公司 | System and method for recycling propane and C3<+> hybrid hydrocarbon in natural gas |
| CN106988710A (en) * | 2016-01-20 | 2017-07-28 | 东营玺诺石油科技有限公司 | A kind of oil well casing gas is pressurized collecting device |
| CN113624570A (en) * | 2021-08-06 | 2021-11-09 | 清华大学 | Vapor-liquid phase equilibrium device and method for analyzing HF in hydrofluorocarbon |
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2014
- 2014-07-17 CN CN201420394325.8U patent/CN204141934U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132504A (en) * | 2014-07-17 | 2014-11-05 | 西安长庆科技工程有限责任公司 | System and method for recycling mixed hydrocarbon from well site natural gas |
| CN104964517A (en) * | 2015-05-25 | 2015-10-07 | 西安长庆科技工程有限责任公司 | Ultralow temperature middle and low pressure nitrogen removal method of petroleum associated gas recovery LNG/LPG/NGL product |
| CN104964517B (en) * | 2015-05-25 | 2017-06-16 | 西安长庆科技工程有限责任公司 | A kind of oil field gas reclaims the ultralow temperature mesolow denitrogenation method of LNG/LPG/NGL products |
| CN105038882A (en) * | 2015-05-29 | 2015-11-11 | 西安长庆科技工程有限责任公司 | Comprehensive fine dewatering technique for recovering LNG/LPG/NGL (liquefied natural gas/liquefied petroleum gas/natural gas liquid) product from saturated hydrous petroleum associated gas |
| CN106988710A (en) * | 2016-01-20 | 2017-07-28 | 东营玺诺石油科技有限公司 | A kind of oil well casing gas is pressurized collecting device |
| CN106988710B (en) * | 2016-01-20 | 2019-03-15 | 东营玺诺石油科技有限公司 | A kind of oil well casing gas pressurization collecting device |
| CN106147905A (en) * | 2016-08-12 | 2016-11-23 | 天津市振津石油天然气工程有限公司 | Miniature movable type skid light ends unit |
| CN106595223A (en) * | 2016-11-22 | 2017-04-26 | 西安长庆科技工程有限责任公司 | System and method for recycling propane and C3<+> hybrid hydrocarbon in natural gas |
| CN113624570A (en) * | 2021-08-06 | 2021-11-09 | 清华大学 | Vapor-liquid phase equilibrium device and method for analyzing HF in hydrofluorocarbon |
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Granted publication date: 20150204 Termination date: 20170717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |