CN206803597U - Gas in natural gas recovery system - Google Patents
Gas in natural gas recovery system Download PDFInfo
- Publication number
- CN206803597U CN206803597U CN201720279533.7U CN201720279533U CN206803597U CN 206803597 U CN206803597 U CN 206803597U CN 201720279533 U CN201720279533 U CN 201720279533U CN 206803597 U CN206803597 U CN 206803597U
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- CN
- China
- Prior art keywords
- gas
- recovery system
- domethanizing column
- heat exchanger
- natural gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a kind of gas in natural gas recovery system of petrochemical industry, the system includes being used to remove the cleaning system of impurity and the piece-rate system distinguished for composition in natural gas in raw natural gas, also include cold energy recovery system, the cold energy recovery system includes being arranged in piece-rate system the circulation line between heat exchanger and domethanizing column and the pump on circulation line, and the condensed fluid in the domethanizing column returns domethanizing column heat supply after circulation line reaches heat exchanger heat exchange.The beneficial effects of the utility model are：By increasing a set of cold energy recovery system in existing recovery system, it is heat exchanger cooling that cold energy recovery system sends the condensate liquid in piece-rate system domethanizing column and cryogenic gas back to heat exchanger as heat transfer medium, domethanizing column heat supply is returned after absorbing heat, so as to play a part of resource recycling, the comprehensive utilization ratio of resource is improved, there is good Social benefit and economic benefit.
Description
Technical field
It the utility model is related to petrochemical industry, more particularly to a kind of gas recovery system for oil for natural gas.
Background technology
The natural gas discharged for the raw natural gas overflowed from oilfield exploitation or gas transmission, these gases escape into sky
Air and environment can be polluted in gas, run into thundery sky and be also possible to trigger security incident, it is therefore desirable to these natural gases
Reclaimed, but all contain a large amount of light oils in these gases, cannot be used directly for life and production and application, it is necessary to recovery
Natural gas carries out separating-purifying processing, to reach the purpose of waste resource recycling.
Existing Investigation of Petroleum Vapor Recovery Technology mainly includes absorption method, condensation method, membrane filter method, or the combination with upper type,
Condensation method production cost is relatively low, is most widely used, but existing condenser system typically all only includes cleaning system and piece-rate system,
Cleaning system is used to remove the impurity in gas, and gas is divided into the methane gas and remaining alkanes group of high-purity by piece-rate system
Into liquefied gas, can be respectively used to life and industrial application.Due to there is many processes for condensing and compressing in whole technical process,
One heat absorption, a heat release, the conversion of these heat energy are not fully used, so as to cause the waste of resource, increased back
Harvest sheet.
Utility model content
To overcome existing gas in natural gas recovery process consuming energy more, the deficiencies of cost recovery is high, the utility model
Technical problem to be solved is：There is provided a kind of resource utilization high gas in natural gas recovery system.
Technical scheme is used by the utility model solves its technical problem：
Gas in natural gas recovery system, including for removing in raw natural gas the cleaning system of impurity and for natural gas
The piece-rate system that middle composition is distinguished, in addition to cold energy recovery system, the cold energy recovery system include being arranged in piece-rate system
Circulation line between heat exchanger and domethanizing column and the pump on circulation line, the condensed fluid warp in the domethanizing column
Circulation line returns domethanizing column heat supply after reaching heat exchanger heat exchange.
It is further the first separator, the first compressor, that the cleaning system includes being sequentially connected by pipeline
One cooler, the second separator and drier, the outlet of drier are connected with the heat exchanger of piece-rate system.
It is further that the piece-rate system includes heat exchanger, the 3rd separator, expanding machine and domethanizing column, described
The entrance of three separators is connected with heat exchanger, and the upper outlet of the 3rd separator passes through the expanded machine of air delivering pipeline and domethanizing column
Upper gas entrance is connected, and the lower part outlet of the 3rd separator is connected by infusion pipeline with demethanation intermediate feed inlet.
It is further that the cold energy recovery system includes two circulation lines, one is located in the middle part of domethanizing column, another
Bar is located at demethanizer bottom, and pump is equipped with two circulation lines.
It is further that a heating tube is additionally provided between the circulation line and domethanizing column of the demethanizer bottom
Road, heat supplying pipeline are provided with reboiler.
Be further be additionally provided with the circulation line of the demethanizer bottom drain pipe road lead to fluid reservoir or
Fractionating column.
It is further that the cold energy recovery system is also arranged between heat exchanger and demethanizer overhead including one
Gas backstreaming pipeline, repressurization is cold after the methane gas on domethanizing column top is imported heat exchanger cooling by the gas backstreaming pipeline
But finished product natural gas is formed.
It is further that the gas backstreaming pipeline successively cools down after heat exchanger by the second compressor, second
The expanding machine of device, the 3rd compressor and the 3rd cooler formation finished product natural gas, second compressor and piece-rate system is one
The coaxial expansion compressor of body.
The beneficial effects of the utility model are：By increasing a set of cold energy recovery system, cold energy in existing recovery system
It is heat exchanger that recovery system sends the condensate liquid in piece-rate system domethanizing column and cryogenic gas back to heat exchanger as heat transfer medium
Cooling, domethanizing column heat supply is returned after absorbing heat, so as to play a part of resource recycling, improves the synthesis of resource
Utilization rate, there is good Social benefit and economic benefit.
Brief description of the drawings
Fig. 1 is the utility model process flow diagram.
It is 1- cleaning systems to be marked in figure, 2- piece-rate systems, 3- cold energy recovery systems, the compressors of 4- second, and 5- second is cold
But device, the compressors of 6- the 3rd, the coolers of 7- the 3rd, 8- drain pipes road, the separators of 11- first, the compressors of 12- first, 13- first
Cooler, the separators of 14- second, 15- driers, 21- heat exchangers, the separators of 22- the 3rd, 23- air delivering pipelines, 24- woven hoses
Road, 25- expanding machines, 26- domethanizing columns, 31- circulation lines, 32- pumps, 33- heat supplying pipelines, 34- reboilers, 35- gas backstreamings
Pipeline.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings.
As shown in figure 1, the utility model includes being used to remove the cleaning system 1 of impurity in raw natural gas and for natural
The piece-rate system 2 that composition is distinguished in gas, in addition to cold energy recovery system 3, the cold energy recovery system 3 include being arranged on segregative line
Circulation line 31 between heat exchanger 21 and domethanizing column 26 and the pump on circulation line 31 32 in system 2, the demethanation
Condensed fluid in tower 26 is reached after heat exchanger 21 exchanges heat through circulation line 31 returns the heat supply of domethanizing column 26.Piece-rate system 2
In heat exchanger 21 be mainly used in reduce gas temperature, the composition of more than C3 in gas is condensed into liquid, therefore heat exchanger
21 need very low chilling temperature, typically cold to be provided for heat exchanger 21 by way of outside adds refrigerant in the prior art
Amount, required cost is higher, and the condensed fluid temperature from domethanizing column 26 out is relatively low, its cold can be used for into heat exchanger
21, the liquid after heat exchange can be that domethanizing column 26 provides required heat again, so as to improve the comprehensive utilization ratio of resource, lower energy
Source consumes.
The cleaning system 1 includes the first separator 11, the cooling of the first compressor 12, first being sequentially connected by pipeline
Device 13, the second separator 14 and drier 15, the outlet of drier 15 are connected with the heat exchanger 21 of piece-rate system 2.First separation
Device 11 is mainly used in removing the impurity and moisture in gas, is then compressed, cools down, separates, and will be produced in compression cooling procedure
Raw moisture and greasy dirt composition remove, and then carry out the heat exchanger 21 of obtained paraffin gas feeding piece-rate system 2 follow-up
Separating technology.
The piece-rate system 2 includes heat exchanger 21, the 3rd separator 22, expanding machine 25 and domethanizing column 26, and the described 3rd
The entrance of separator 22 is connected with heat exchanger 21, the upper outlet of the 3rd separator 22 by the expanded machine 25 of air delivering pipeline 23 with
The upper gas entrance of domethanizing column 26 is connected, and the lower part outlet of the 3rd separator 22 passes through in infusion pipeline 24 and domethanizing column 26
Portion liquid inlet is connected.The temperature of heat exchanger 21 is very low, and more than C2 paraffin gas can be condensed into liquid, below C2 gas
Entered by air delivering pipeline 23 after the cooling of the expansion throttling of expanding machine 25 and enter the top of domethanizing column 26 progress demethanation technique, more than C3
Condensed fluid the middle part of domethanizing column 26 is entered by infusion pipeline 24.
The cold energy recovery system 3 includes two circulation lines 31, and one is located at the middle part of domethanizing column 26, and another is located at
The bottom of domethanizing column 26, pump 32 is equipped with two circulation lines 31.Because the middle part of domethanizing column 26 is different with temperature of lower,
Two pipeline can provide different potential temperature demands for system.
By heat exchanger 21 heat exchange after condensed fluid after domethanizing column 26 is returned to heating load it is limited, in order to meet piptonychia
The work of alkane tower 26 institute calorific requirement, one is additionally provided between the circulation line 31 and domethanizing column 26 of the bottom of domethanizing column 26
Heat supplying pipeline 33, heat supplying pipeline 33 are provided with reboiler 34, and reboiler 34 can also provide heat when system is just run for system.
The condensate liquid come out from the bottom of domethanizing column 26 can be directly as domestic fuel or industrial chemicals, so described de-
A drain pipe road 8 is additionally provided with the circulation line 31 of the bottom of methane tower 26 and leads to fluid reservoir or fractionating column, condensate liquid is delivered to
Other technological processes.
Because the methane gas from the top of domethanizing column 26 out also has relatively low temperature, in order to be provided using the temperature
Source, heat exchanger 21 can be also conducted into, concrete structure is to set one between the heat exchanger 21 and the top of domethanizing column 26
Gas backstreaming pipeline 35, after the methane gas on the top of domethanizing column 26 is imported the cooling of heat exchanger 21 by the gas backstreaming pipeline 35
Repressurization is cooled into finished product natural gas, so as to further improve resource utilization.
Further, the gas backstreaming pipeline 35 is successively cold by the second compressor 4, second after heat exchanger 21
But device 5, the 3rd compressor 6 and the 3rd cooler 7 form finished product natural gas, second compressor 4 and the expansion of piece-rate system 2
The coaxial expansion compressor that machine 25 is integrated., can be same using coaxial expansion compressor because expansion is with compressing reverse procedure each other
When complete two procedures, further reduce energy resource consumption.
The system in existing recovery system by increasing a set of cold energy recovery system, and cold energy recovery system is by piece-rate system
It is heat exchanger cooling that condensate liquid and cryogenic gas in domethanizing column send heat exchanger back to as heat transfer medium, is returned again after absorbing heat
To domethanizing column heat supply, so as to play a part of resource recycling, the comprehensive utilization ratio of resource is improved, there is good society
Can benefit and economic benefit.
Claims (8)
1. gas in natural gas recovery system, including for removing the cleaning system (1) of impurity in raw natural gas and for natural
The piece-rate system (2) that composition is distinguished in gas, it is characterized in that：Also include cold energy recovery system (3), the cold energy recovery system (3)
Including the circulation line (31) being arranged in piece-rate system (2) between heat exchanger (21) and domethanizing column (26) and positioned at circulation pipe
Pump (32) on road (31), the condensed fluid in the domethanizing column (26) reach heat exchanger (21) heat exchange through circulation line (31)
After return domethanizing column (26) provide thermal source.
2. gas in natural gas recovery system as claimed in claim 1, it is characterized in that：The cleaning system (1) includes passing through pipe
The first separator (11), the first compressor (12), the first cooler (13), the second separator (14) and the drying that road is sequentially connected
Device (15), the outlet of drier (15) are connected with the heat exchanger (21) of piece-rate system (2).
3. gas in natural gas recovery system as claimed in claim 1, it is characterized in that：The piece-rate system (2) includes heat exchanger
(21), the 3rd separator (22), expanding machine (25) and domethanizing column (26), the entrance and heat exchanger of the 3rd separator (22)
(21) it is connected, the upper outlet of the 3rd separator (22) passes through on air delivering pipeline (23) expanded machine (25) and domethanizing column (26)
Portion gas access is connected, and the lower part outlet of the 3rd separator (22) passes through infusion pipeline (24) and domethanizing column (26) central liquid
Entrance is connected.
4. gas in natural gas recovery system as claimed in claim 1, it is characterized in that：The cold energy recovery system (3) includes two
Bar circulation line (31), one is located in the middle part of domethanizing column (26), and another is located at domethanizing column (26) bottom, two circulation pipes
Pump (32) is equipped with road (31).
5. gas in natural gas recovery system as claimed in claim 4, it is characterized in that：The circulation of domethanizing column (26) bottom
A heat supplying pipeline (33) is additionally provided between pipeline (31) and domethanizing column (26), heat supplying pipeline (33) is provided with reboiler
(34)。
6. gas in natural gas recovery system as claimed in claim 5, it is characterized in that：The circulation of domethanizing column (26) bottom
A drain pipe road (8) is additionally provided with pipeline (31) and leads to liquid storage pipe or fractionating column.
7. gas in natural gas recovery system as claimed in claim 3, it is characterized in that：The cold energy recovery system (3) also includes
One gas backstreaming pipeline (35) being arranged between heat exchanger (21) and domethanizing column (26) top, the gas backstreaming pipeline
(35) repressurization is cooled into finished product natural gas after the methane gas on domethanizing column (26) top being imported into heat exchanger (21) cooling.
8. gas in natural gas recovery system as claimed in claim 7, it is characterized in that：The gas backstreaming pipeline (35) is being passed through
Heat exchanger (21) successively passes through the second compressor (4), the second cooler (5), the 3rd compressor (6) and the 3rd cooler (7) afterwards
The coaxial expansion that the expanding machine (25) of formation finished product natural gas, second compressor (4) and piece-rate system (2) is integrated is compressed
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720279533.7U CN206803597U (en) | 2017-03-21 | 2017-03-21 | Gas in natural gas recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720279533.7U CN206803597U (en) | 2017-03-21 | 2017-03-21 | Gas in natural gas recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206803597U true CN206803597U (en) | 2017-12-26 |
Family
ID=60729661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720279533.7U Expired - Fee Related CN206803597U (en) | 2017-03-21 | 2017-03-21 | Gas in natural gas recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206803597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839650A (en) * | 2017-03-21 | 2017-06-13 | 四川华亿石油天然气工程有限公司 | Gas in natural gas recovery system and technique |
-
2017
- 2017-03-21 CN CN201720279533.7U patent/CN206803597U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839650A (en) * | 2017-03-21 | 2017-06-13 | 四川华亿石油天然气工程有限公司 | Gas in natural gas recovery system and technique |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20200321 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |