CN206739669U - A kind of propane refrigeration system of light ends unit - Google Patents
A kind of propane refrigeration system of light ends unit Download PDFInfo
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- CN206739669U CN206739669U CN201720349382.8U CN201720349382U CN206739669U CN 206739669 U CN206739669 U CN 206739669U CN 201720349382 U CN201720349382 U CN 201720349382U CN 206739669 U CN206739669 U CN 206739669U
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- propane
- refrigeration system
- evaporator
- light ends
- compressor
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Abstract
The utility model discloses a kind of propane refrigeration system of light ends unit, the propane refrigeration system includes：It is in turn connected to form liquid separation tank, compressor, air cooler, high pressure propane storage tank, choke valve and the propane evaporator of annular channels；The propane refrigeration system also includes, feed gas compressor, the first entrance pipeline of the feed gas compressor is connected with the high pressure propane storage tank, and the tube side connection of outlet line and propane evaporator, the second entrance pipeline of the feed gas compressor is raw material gas pipeline.Propane refrigeration system provided by the utility model, the purity of refrigerant propane is improved by circuit design so that natural gas can obtain enough colds, and then enable natural gas to be down to desired temperature, improve light hydrocarbon recovery rate.
Description
Technical field
Vapor compression refrigeration field is the utility model is related to, more particularly, to a kind of propane system of light ends unit
Cooling system.
Background technology
Vapor compression refrigeration is a kind of conventional refrigerating method for making natural gas obtain low temperature in gas reducing liquid recovery.Utilize
Cryogen, from the absorbing natural gas latent heat of vaporization, makes natural gas obtain low temperature in vaporescence.Vapor compression refrigeration device mainly by
Four parts form, i.e.,：Compressor, condenser, expansion valve and evaporator.Refrigerant vapor is adiabatic in compressor and is compressed into overheat
Steam, afterwards, refrigerant superheat steam enter condenser, wait pressure to be condensed into for saturated liquid, and refrigerant liquid is again expanded
Valve adiabatic throttling, after throttling expansion, the low-pressure low-temperature cryogen of high humility enters evaporator.Evaporator actually walk by heat exchanger, cryogen
Shell, naturally makes tube layer leave with rage, and cryogen waits pressure to flash to for saturated vapor in shell, and the required latent heat of vaporization is by natural air lift
For.Refrigerant constantly carries out above-mentioned circulation in device, natural gas is obtained low temperature.Vapor Compression Refrigeration Cycle with preferably
Inverse Carnot Refrigeration Cycle (being made up of adiabatic, isotherm compression and thermal insulation, the process of isothermal expansion four) is closer to, and refrigerating efficiency is higher,
Widely used in gas reducing liquid recovery.
Conventional refrigerant is in gas industry：Ammonia and hydro carbons.Ammonia is a kind of preferable refrigerant, in operating temperature model
Enclose that the interior latent heat of vaporization is big, refrigerating capacity is strong, small to environmental disruption, but have larger toxicity, the steaming of ammonia if being intended to reclaim more lime set
Send out temperature drift.Mainly there are propane, propylene, ethane, ethene and methane etc. as the hydro carbons that refrigerant uses.Propane is as refrigeration
The advantages of agent is that ODP is zero, and chamber effect potential value is also smaller, and evaporating temperature is relatively low, to human toxicity
It is small.In identical evaporating pressure, propane has minimum boiling temperature, and unstripped gas can be made to reach relatively low cryogenic temperature.When
When processing medium (such as natural gas) is identical with its fire risk grade, refrigeration compressor set can be with process equipment compact Layout；
Shortcoming is that evaporative phase-change enthalpy is smaller (therefore unit volume refrigerating capacity is smaller, and energy consumption is higher, and equipment size is larger), inflammable and explosive, oil
Dissolubility is larger, is not easy to hunt leak, security is poor.In China, propane refrigeration technique is applied to natural gas processing and lighter hydrocarbons recovery also not
To 20 years, but the popularization of this technology is rapid.In recent years, the outer of the newly-built natural gas processing station in China cold all uses substantially
Propane refrigeration technique, the old device that some originals are designed as ammonia refrigeration technique are also being transformed into propane refrigeration technique.General propane system
Cold energy is enough to be cooled to -20 DEG C~-50 DEG C raw natural gas, realizes the de- hydrocarbon purpose of natural gas in low temperature separation.
But be not at present very good as the refrigeration of refrigerant using propane, cause natural gas to be down to
Desired temperature, influence light hydrocarbon recovery rate.Therefore, it is necessary to develop a kind of propane refrigeration system for improving propane refrigeration effect, use
In light ends unit.
Utility model content
The main reason for inventor has found and causes refrigeration undesirable is that the purity of the propane as refrigeration working medium is inadequate,
The purified propylene oxide generally bought is 80% or so, containing required by the impurity, with refrigeration system such as methane, ethane, iso-butane
98% purified propylene oxide has larger difference, causes refrigeration undesirable, and natural gas can not be down to desired temperature, influences lighter hydrocarbons and returns
Yield.
The purpose of this utility model is to provide a kind of propane refrigeration system of light ends unit, ensures refrigeration, carries
High light hydrocarbon recovery rate.
In order to solve the above problems, the utility model proposes a kind of propane refrigeration system of light ends unit, this third
Alkane refrigeration system includes：It is in turn connected to form liquid separation tank, compressor, air cooler, high pressure propane storage tank, the choke valve of annular channels
And propane evaporator；
The propane refrigeration system also includes：
Feed gas compressor, the first entrance pipeline of the feed gas compressor are connected with the high pressure propane storage tank, the
Two suction lines are raw material gas pipeline, and the tube side of outlet line and propane evaporator connects.
Preferably, another outlet of the liquid separation tank is connected with the shell side of the propane evaporator.
Preferably, another outlet of the liquid separation tank is connected with the bottom shell side inlet of the propane evaporator.
Preferably, the top shell-side outlet of the propane evaporator is connected with the liquid separation tank.
Preferably, the first entrance pipeline of the feed gas compressor is connected with the top of the high pressure propane storage tank.
Preferably, the choke valve is one.
Propane refrigeration system provided by the utility model, the purity of refrigerant propane is improved by circuit design so that
Natural gas can obtain enough colds, and then enable natural gas to be down to desired temperature, improve light hydrocarbon recovery rate.
Device of the present utility model has other a characteristics and advantage, and these characteristics and advantage are from the accompanying drawing being incorporated herein
It will be apparent with subsequent specific embodiment, or by the accompanying drawing and subsequent specific embodiment being incorporated herein
Middle to be stated in detail, these the drawings and specific embodiments are provided commonly for explaining certain principles of the present utility model.
Brief description of the drawings
The utility model exemplary embodiment is described in more detail in conjunction with the accompanying drawings, it is of the present utility model above-mentioned
And other purposes, feature and advantage will be apparent, wherein, in the utility model exemplary embodiment, identical
Reference number typically represents same parts.
Fig. 1 shows the schematic diagram of the propane refrigeration system according to light ends unit of the present utility model.
Description of reference numerals
1st, compressor 2, air cooler 3, high pressure propane storage tank 4, choke valve 5, propane evaporator 6, feed gas compressor
7th, liquid separation tank 8, unstripped gas
Embodiment
The utility model is more fully described below with reference to accompanying drawings.Although shown in accompanying drawing of the present utility model preferred
Embodiment, however, it is to be appreciated that may be realized in various forms the utility model without should be limited by embodiments set forth here
System.On the contrary, these embodiments are provided so that the utility model is more thorough and complete, and can will be of the present utility model
Scope is intactly communicated to those skilled in the art.
Fig. 1 shows the schematic diagram of the propane refrigeration system according to light ends unit of the present utility model.
As shown in figure 1, the utility model provides a kind of propane refrigeration system of light ends unit, the propane refrigeration system
System includes：It is in turn connected to form liquid separation tank 7, compressor 1, air cooler 2, high pressure propane storage tank 3, the and of choke valve 4 of annular channels
Propane evaporator 5；
The propane refrigeration system also includes：
Feed gas compressor 6, the first entrance pipeline of the feed gas compressor 6 are connected with the high pressure propane storage tank 3,
Second entrance pipeline is raw material gas pipeline, and outlet line is connected with the tube side of propane evaporator 5.
Often containing impurity such as a small amount of methane, ethane and iso-butanes in refrigerant propane.These impurity especially ethane pair
The power of compressor 1 has a certain impact, therefore should give limitation to the ethane content in propane.Meanwhile the purity of propane is also straight
Influence refrigeration is connect, i.e., the process fluid being cooled in evaporator can not be down to expected chilling temperature, light so as to cause
The hydrocarbon rate of recovery reduces, and can not realize the purpose of lighter hydrocarbons recovery.
The utility model is taken out by the increased multiple line between the feed gas compressor 6 and the high pressure propane storage tank 3
Walk the impurity entered in the high pressure propane refrigerant in the high pressure propane storage tank 3, namely for methane gas, ethane gas and iso-butane
The impurity such as gas, the impurity enter the feed gas compressor 6 by the first entrance pipeline of the feed gas compressor 6,
Enter the tube layer of propane evaporator 5 by feed gas compressor 6 jointly with unstripped gas, obtain cold, carry out lighter hydrocarbons recovery.Pass through
Increase the multiple line, eliminate the impurity such as methane, ethane and iso-butane in propane gas, and then improve the purity of propane,
Refrigeration is ensure that, improves light hydrocarbon recovery rate.
Refrigeration system provided by the utility model, main line is that refrigerant propane flammable gas is pressurized to 1.5MPa through compressor 1, through sky
Cooler 2 is cooled to 40 DEG C, subsequently into high pressure propane storage tank 3, -30 DEG C is cooled to through the expansion of choke valve 4, into evaporator with treating
The heat exchange gas of cooling, propane liquid evaporation is absorbed heat in evaporator, and natural gas is cooled to -30 DEG C, the propane flammable gas of evaporation
After body isolates the liquid phase of entrainment into liquid separation tank 7, enter back into compressor 1 and be pressurized, and so on circulated.
In one example, another outlet of the liquid separation tank 7 is connected with the shell side of the propane evaporator 5.
In one example, another outlet of the liquid separation tank 7 and the bottom shell side inlet of the propane evaporator 5 connect
Connect.
The propane gas for coming from the propane evaporator 5 isolates the liquid carried secretly in propane flammable gas by the liquid separation tank 7
Phase, the liquid phase propane isolated are returned by another outlet of the liquid separation tank 7 and the bottom shell side inlet of the propane evaporator 5
To the propane evaporator 5.
In one example, the top shell-side outlet of the propane evaporator 5 is connected with the liquid separation tank 7.
The propane vaporized by the propane evaporator 5 enters institute by the top shell-side outlet of the propane evaporator 5
State liquid separation tank 7.
In one example, the top of the first entrance pipeline of the feed gas compressor 6 and the high pressure propane storage tank 3
Connection.
In one example, the choke valve 4 is one.
Embodiment
As shown in figure 1, the utility model provides a kind of propane refrigeration system of light ends unit, the propane refrigeration system
System includes, and is in turn connected to form liquid separation tank 7, compressor 1, air cooler 2, high pressure propane storage tank 3, the and of choke valve 4 of annular channels
Propane evaporator 5；The propane refrigeration system also includes, feed gas compressor 6, the first entrance pipe of the feed gas compressor 6
Line is connected with the top of the high pressure propane storage tank 3, and second entrance pipeline is raw material gas pipeline, outlet line and propane evaporator
5 tube side connection；Wherein, another outlet of the liquid separation tank 7 is connected with the bottom shell side inlet of the propane evaporator 5, institute
The top shell-side outlet for stating propane evaporator 5 is connected with the liquid separation tank 7, and the choke valve 4 is 1.
Propane refrigeration system provided by the utility model, the purity of refrigerant propane is improved by circuit design so that
Natural gas can obtain enough colds, and then enable natural gas to be down to desired temperature, improve light hydrocarbon recovery rate.This practicality
The propane refrigeration system of new offer can also be used for being provided with the oil-gas gathering and transportation of propane refrigeration system, processing, manufacture field, can be with
Produce larger economic benefit.
It is described above embodiment of the present utility model, described above is exemplary, and non-exclusive, and
It is also not necessarily limited to disclosed embodiment.In the case of the scope and spirit without departing from embodiment described, for this technology
Many modifications and changes will be apparent from for the those of ordinary skill in field.
Claims (6)
1. a kind of propane refrigeration system of light ends unit, it is characterised in that the propane refrigeration system includes：It is sequentially connected shape
Circularize liquid separation tank (7), compressor (1), air cooler (2), high pressure propane storage tank (3), choke valve (4) and the propane evaporation of path
Device (5)；
The propane refrigeration system also includes：
Feed gas compressor (6), the first entrance pipeline of the feed gas compressor (6) connect with the high pressure propane storage tank (3)
Connect, second entrance pipeline is raw material gas pipeline, and outlet line is connected with the tube side of propane evaporator (5).
2. the propane refrigeration system of light ends unit according to claim 1, it is characterised in that the liquid separation tank (7)
Another outlet be connected with the shell side of the propane evaporator (5).
3. the propane refrigeration system of light ends unit according to claim 2, it is characterised in that the liquid separation tank (7)
Another outlet be connected with the bottom shell side inlet of the propane evaporator (5).
4. the propane refrigeration system of light ends unit according to claim 1, it is characterised in that the propane evaporator
(5) top shell-side outlet is connected with the liquid separation tank (7).
5. the propane refrigeration system of light ends unit according to claim 1, it is characterised in that the unstripped gas compression
The first entrance pipeline of machine (6) is connected with the top of the high pressure propane storage tank (3).
6. the propane refrigeration system of light ends unit according to claim 1, it is characterised in that the choke valve (4)
For one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720349382.8U CN206739669U (en) | 2017-04-05 | 2017-04-05 | A kind of propane refrigeration system of light ends unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720349382.8U CN206739669U (en) | 2017-04-05 | 2017-04-05 | A kind of propane refrigeration system of light ends unit |
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| Publication Number | Publication Date |
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| CN206739669U true CN206739669U (en) | 2017-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108728197A (en) * | 2018-08-06 | 2018-11-02 | 西南石油大学 | A kind of oil field accompanying gas recovering device and method |
-
2017
- 2017-04-05 CN CN201720349382.8U patent/CN206739669U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108728197A (en) * | 2018-08-06 | 2018-11-02 | 西南石油大学 | A kind of oil field accompanying gas recovering device and method |
| CN108728197B (en) * | 2018-08-06 | 2023-11-14 | 西南石油大学 | Oilfield associated gas recovery device and method |
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