CN204880968U - High -pressure spray liquefaction system - Google Patents
High -pressure spray liquefaction system Download PDFInfo
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- CN204880968U CN204880968U CN201520584833.7U CN201520584833U CN204880968U CN 204880968 U CN204880968 U CN 204880968U CN 201520584833 U CN201520584833 U CN 201520584833U CN 204880968 U CN204880968 U CN 204880968U
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Abstract
The utility model provides a high -pressure spray liquefaction system, includes gas compression system (1), heat transfer system (2), refrigerating system (3) and gas -liquid separation system (4), heat transfer system (2) include the unit of heat exchanger in advance (5), one -level heat exchanger unit (6), at least one heavy hydrocarbon separator (7) and the second grade heat exchanger unit (8) that concatenates in proper order, wherein gas compression system (1) export with heat exchanger unit (5) entry linkage in advance, one -level heat exchanger unit (6) passes through the heat transfer is carried out in refrigerating system (3), second grade heat exchanger unit (8) export and gas -liquid separation system (4) entry linkage. Tradition high -pressure spray liquefaction cold box adds the utility model discloses behind the core facility heavy hydrocarbon separator, the heavy hydrocarbon who smugglies secretly in the natural gas drops to below the 1ppm, the effectual a small amount of impurity that contains in the compressor oil that the natural gas smugglied secretly and the natural gas that has separated.
Description
Technical field
The utility model relates to liquefied natural gas (LNG) production field, particularly a kind of high-pressure spray liquefaction system.
Background technology
High-pressure spray liquefaction technology, because technique is simply very extensive in area of natural gas liquefaction application, but there is easily stifled problem in heat exchanger in high-pressure spray liquefaction system, after heat exchanger blocking, displacement of need stopping purges, cause very large loss, as shown in conventional natural gas liquefaction system Fig. 1: purified natural gas boosts to 20MPa through compressor compression, enter pre-heat exchanger unit 5 successively, first-class heat exchanger unit 6 and secondary heat exchanger unit 8 carry out heat exchange cooling, in the exit of first-class heat exchanger unit 6 and secondary heat exchanger unit 8, the temperature of natural gas is respectively-35 DEG C,-68 DEG C.Common have hydraulic shrinking machine technology maturation, price is lower, but compressor outlet 20MPa high-voltage high-speed natural gas is easily carried compressor oil secretly and is entered ice chest, cause a large amount of wastes of compressor oil, and compressor oil is after entering ice chest, lowers the temperature together with natural gas, viscosity becomes large, secondary heat exchanger unit 8 starts to occur blocking, and as cleaning of stopping not in time, the even follow-up storage tank of whole ice chest will be polluted by compressor oil.Occur for reducing by this kind of problem, common scheme is replacing compressor is oilless (oil free) compressor, but this kind of Compressor Technology is relatively immature, and price is high, causes very large financial burden to enterprise.In addition, oilless (oil free) compressor still old micro-compressor oil is carried secretly and is entered ice chest, and after running a period of time, secondary heat exchanger unit 8 still occurs blockage problem.Under conventional compressor oil normal pressure, condensation point is at about-55 ~-52 DEG C, and in secondary heat exchanger unit 8, natural gas is cooled to-68 DEG C by-35 DEG C, and compressor oil confuses other impurity, and viscosity change is large in the process, and has a small amount of solid to separate out, and causes heat exchanger to block.
Therefore in order to improve the production efficiency of high-pressure spray liquefaction process, prevent because of compressor oil to be mixed in natural gas and because of natural gas itself with trace impurity cause heat exchanger to block and cause production accident, design and a kind ofly compressor oil can be separated from natural gas and further the high-pressure spray liquefaction system of natural gas purification be had great practical significance.
Utility model content
The utility model, for the deficiencies in the prior art, designs a kind of compressor oil can be separated from natural gas and further by as follows for the concrete technical scheme of high-pressure spray liquefaction system of natural gas purification:
Described heavy hydrocarbon separator (7) comprises housing (9) and the first dividing plate (10), this housing (9) is vertically placed, described housing (9) is divided into upper and lower two chambers by described first dividing plate (10), wherein lower chambers is the first chamber (11), upper chamber is the second chamber (12), gas inlet and the first heavy hydrocarbon recovery port is had in described first chamber (11), and described gas inlet is positioned at above described first heavy hydrocarbon recovery port, efficient centrifugal tube bank (13) is provided with in described first chamber (11), the gas outlet of this efficient centrifugal tube bank (13) is connected with described second chamber (12), gas outlet is offered on described second chamber (12) top.The utility model is achieved in that when natural gas is after gas compression system (1) compression, enter heat-exchange system (2), first pass through pre-heat exchanger unit (5) at the middle natural gas of heat-exchange system (2) and carry out pre-heat exchange process, then natural gas enters first-class heat exchanger unit (6) and freezes, then from first-class heat exchanger unit out, after heavy hydrocarbon separator (1) carries out heavy hydrocarbon separation, enter secondary heat exchanger unit refrigeration again, then enter Separate System of Water-jet (4).
For better realizing the utility model, may further be:
Described heavy hydrocarbon separator (7) comprises housing (9), this housing (9) is vertically placed, described housing (9) is divided into upper and lower two chambers by the first dividing plate (10), wherein lower chambers is the first chamber (11), upper chamber is the second chamber (12), described first chamber (11) offers gas inlet and the first heavy hydrocarbon recovery port respectively, and described gas inlet is positioned at above described first heavy hydrocarbon recovery port, efficient centrifugal tube bank (13) is provided with in described first chamber (11), the gas outlet of this efficient centrifugal tube bank (13) is connected with described second chamber (12), gas outlet is offered on described second chamber (12) top.Structure is simple, and interchangeability is strong, easy access.
Second partition (14) is also provided with in described first chamber (11), described first chamber (11) is divided into upper and lower two chambers by this second partition (14), wherein lower chambers is that heavy hydrocarbon reclaims room, upper chamber is single filter room, described first heavy hydrocarbon recovery port is positioned at heavy hydrocarbon and reclaims room, described gas inlet is positioned at single filter room, it is indoor that described efficient centrifugal tube bank (13) is positioned at described single filter, and the liquid outlet of this efficient centrifugal tube bank (13) reclaims room with heavy hydrocarbon is connected.Gas and heavy hydrocarbon liquid lay respectively at different chambers, are convenient to the recovery of heavy hydrocarbon, prevent liquid splash.
The 3rd dividing plate (15) is provided with in described second chamber (12), described second chamber (12) is divided into upper and lower two chambers by the 3rd dividing plate (15), wherein lower chambers is inlet plenum, upper chamber is cascade filtration room, the second heavy hydrocarbon recovery port is offered in this bottom, cascade filtration room, described gas outlet is positioned at cascade filtration room, these cascade filtration indoor are provided with efficient Coalescence filter core (16), and this efficient Coalescence filter core (16) entrance is connected with described inlet plenum.A small amount of heavy hydrocarbon species unsegregated in natural gas can be separated further, improve the cleanliness factor of natural gas further, reduce heat exchanger blocking frequency, reduce maintenance cost, enhance productivity.
Also be filled with high-efficiency adsorbent (17) in described cascade filtration indoor, this high-efficiency adsorbent (17) is positioned at described efficient Coalescence filter core (16) top.Further raising quality of natural gas, and by Minor Heavy Hydrocarbon adsorption filtration not separated in natural gas.
Efficient filter core (18) is also provided with in described cascade filtration indoor, this efficient filter core (18) is positioned at described high-efficiency adsorbent (17) top, and the outlet of this efficient filter core (18) is connected with described gas outlet.Natural gas via can be crossed the trace solid dust removing that high-efficiency adsorbent (17) produces.
The beneficial effects of the utility model are: the heavy hydrocarbon carried secretly in natural gas in the utility model high-pressure spray liquefaction system is down to below 1ppm, effective be separated entrained with in natural gas compressor oil and natural gas in a small amount of impurity of containing, to the technique adopted without oil or micro-hydraulic shrinking machine, avoid the secondary heat exchanger unit blockage problem after production run certain hour; Have the technique of hydraulic shrinking machine to adopting, well solving compressor oil wastes and blocks the follow up device that heat exchanger unit causes in a large number and polluted the problem brought by compressor oil; To newly-built factory, greatly reduce compressor requirements of type selecting; Because there is hydraulic shrinking machine price cheaper, greatly can reduce equipment investment, make the utility model application adaptability stronger, range of application is more extensive.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of conventional natural gas liquefaction system;
Fig. 2 is the schematic diagram having natural gas liquefaction system of the present utility model;
Fig. 3 is the structural representation of heavy hydrocarbon separator.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
As shown in Figures 2 and 3: this high-pressure spray liquefaction system comprises gas compression system 1, heat-exchange system 2, refrigeration system 3, Separate System of Water-jet 4, heat-exchange system comprises the pre-heat exchanger unit 5, first-class heat exchanger unit 6, heavy hydrocarbon separator 7 and the secondary heat exchanger unit 8 that are connected in series successively, and this first-class heat exchanger unit 6 carries out heat exchange by refrigeration system 3; The refrigeration principle of heater unit 5 is that the low-temperature circulating gas by draining from secondary heat exchanger unit 8 carries out heat exchange refrigeration to heater unit 5; The refrigeration principle of this secondary heat exchanger unit 8 is that the low-temperature circulating gas by going out from Separate System of Water-jet 4 drainage carries out heat exchange refrigeration to secondary heat exchanger unit 8; The outlet of this secondary heat exchanger unit 8 is connected with Separate System of Water-jet 4 entrance.After the compressor compresses in natural gas via gas compression system 1 boosts to 20MPa, enter pre-heat exchanger unit 5 and carry out pre-heat exchange process, then enter first-class heat exchanger unit 6 and carry out heat exchange, from a small amount of impurity that the natural gas of first-class heat exchanger unit 6 outlet outflow first contains through heavy hydrocarbon separator 7 separate compressor oil and natural gas, then enter secondary heat exchanger unit 8 and carry out heat exchange cooling, the heavy hydrocarbon be separated in heavy hydrocarbon separator 7, by fluid level controller automatic liquid level control, reuses after reclaiming.This heavy hydrocarbon separator 7 comprises housing 9 and the first dividing plate 10, this housing 9 is vertically placed, housing 9 is divided into upper and lower two chambers by this first dividing plate 10, wherein lower chambers is the first chamber 11, upper chamber is the second chamber 12, in the first chamber 11, have gas inlet and the first heavy hydrocarbon recovery port, and gas inlet is positioned at above the first heavy hydrocarbon recovery port.Second partition 14 is provided with in the first chamber 11, first chamber 11 is divided into upper and lower two chambers by this second partition 14, wherein upper chamber is single filter room, lower chambers is that heavy hydrocarbon reclaims room, efficient centrifugal tube bank 13 is provided with in single filter indoor, and the gas outlet of this efficient centrifugal tube bank 13 is connected with the second chamber 12, the liquid outlet of this efficient centrifugal tube bank 13 reclaims room with heavy hydrocarbon and is connected; The 3rd dividing plate 15 is provided with in the second chamber, second chamber 12 is divided into upper and lower two chambers by the 3rd dividing plate 15, wherein lower chambers is inlet plenum, upper chamber is cascade filtration room, the second heavy hydrocarbon recovery port is offered in this bottom, cascade filtration room, gas outlet is positioned at cascade filtration room, is disposed with efficient Coalescence filter core 16, high-efficiency adsorbent 17, efficient filter core 18 in these cascade filtration indoor from bottom to up.Wherein efficient Coalescence filter core 16 entrance is connected with inlet plenum, and the outlet of this efficient filter core 18 is connected with gas outlet.
Claims (6)
1. a high-pressure spray liquefaction system, comprise gas compression system (1), heat-exchange system (2), refrigeration system (3) and Separate System of Water-jet (4), it is characterized in that: described heat-exchange system (2) comprises the pre-heat exchanger unit (5) be connected in series successively, first-class heat exchanger unit (6), at least one heavy hydrocarbon separator (7) and secondary heat exchanger unit (8), wherein said gas compression system (1) outlet is connected with described pre-heat exchanger unit (5) entrance, described first-class heat exchanger unit (6) carries out heat exchange by described refrigeration system (3), described secondary heat exchanger unit (8) outlet is connected with Separate System of Water-jet (4) entrance.
2. a kind of high-pressure spray liquefaction system according to claim 1, it is characterized in that: described heavy hydrocarbon separator (7) comprises housing (9), this housing (9) is vertically placed, described housing (9) is divided into upper and lower two chambers by the first dividing plate (10), wherein lower chambers is the first chamber (11), upper chamber is the second chamber (12), described first chamber (11) offers gas inlet and the first heavy hydrocarbon recovery port respectively, and described gas inlet is positioned at above described first heavy hydrocarbon recovery port, efficient centrifugal tube bank (13) is provided with in described first chamber (11), the gas outlet of this efficient centrifugal tube bank (13) is connected with described second chamber (12), gas outlet is offered on described second chamber (12) top.
3. a kind of high-pressure spray liquefaction system according to claim 2, it is characterized in that: in described first chamber (11), be also provided with second partition (14), described first chamber (11) is divided into upper and lower two chambers by this second partition (14), wherein lower chambers is that heavy hydrocarbon reclaims room, upper chamber is single filter room, described first heavy hydrocarbon recovery port is positioned at heavy hydrocarbon and reclaims room, described gas inlet is positioned at single filter room, it is indoor that described efficient centrifugal tube bank (13) is positioned at described single filter, and the liquid outlet of this efficient centrifugal tube bank (13) reclaims room with heavy hydrocarbon and is connected.
4. a kind of high-pressure spray liquefaction system according to claim 3, it is characterized in that: in described second chamber (12), be provided with the 3rd dividing plate (15), described second chamber (12) is divided into upper and lower two chambers by the 3rd dividing plate (15), wherein lower chambers is inlet plenum, upper chamber is cascade filtration room, the second heavy hydrocarbon recovery port is offered in this bottom, cascade filtration room, described gas outlet is positioned at cascade filtration room, these cascade filtration indoor are provided with efficient Coalescence filter core (16), this efficient Coalescence filter core (16) entrance is connected with described inlet plenum.
5. a kind of high-pressure spray liquefaction system according to claim 4, it is characterized in that: be also filled with high-efficiency adsorbent (17) in described cascade filtration indoor, this high-efficiency adsorbent (17) is positioned at described efficient Coalescence filter core (16) top.
6. a kind of high-pressure spray liquefaction system according to claim 5, it is characterized in that: be also provided with efficient filter core (18) in described cascade filtration indoor, this efficient filter core (18) is positioned at described high-efficiency adsorbent (17) top, and the outlet of this efficient filter core (18) is connected with described gas outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520584833.7U CN204880968U (en) | 2015-08-06 | 2015-08-06 | High -pressure spray liquefaction system |
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| CN201520584833.7U CN204880968U (en) | 2015-08-06 | 2015-08-06 | High -pressure spray liquefaction system |
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| CN204880968U true CN204880968U (en) | 2015-12-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11460244B2 (en) | 2016-06-30 | 2022-10-04 | Baker Hughes Oilfield Operations Llc | System and method for producing liquefied natural gas |
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2015
- 2015-08-06 CN CN201520584833.7U patent/CN204880968U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11460244B2 (en) | 2016-06-30 | 2022-10-04 | Baker Hughes Oilfield Operations Llc | System and method for producing liquefied natural gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ji Zengming Inventor after: Dai Jiyu Inventor after: Tu Qiaoling Inventor before: Ji Zengming Inventor before: Dai Jiyu Inventor before: Tu Qiaoling |
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| COR | Change of bibliographic data |