CN101700456B - Gas dehumidifying device with controllable supersonic speed of shock wave - Google Patents
Gas dehumidifying device with controllable supersonic speed of shock wave Download PDFInfo
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- CN101700456B CN101700456B CN2009100243479A CN200910024347A CN101700456B CN 101700456 B CN101700456 B CN 101700456B CN 2009100243479 A CN2009100243479 A CN 2009100243479A CN 200910024347 A CN200910024347 A CN 200910024347A CN 101700456 B CN101700456 B CN 101700456B
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Abstract
The invention relates to a gas dehumidifying device with a controllable supersonic speed of a shock wave. The air current generates strong rotation when passing a guide vane grid, swells and accelerates to a supersonic speed through a contractile annular channel; the tail end of a central worm is a compression region of the shock wave, and in the compression region, the air current of the supersonic speed decelerates to a subsonic speed through the compression of an oblique shock wave and a normal shock wave; liquid drops continuously grow in the subsonic speed section, move to the outer side of a pipeline under the action of the centrifugal force, and finally enter a liquid-collecting chamber to be discharged by a liquid outlet; while the dry gas enters an exhaust chamber and is discharged by an air outlet. In the invention, the compression region of the shock wave is designed, and the growth region of liquid drops is divided into the supersonic speed region and the subsonic speed region, and the total length of the pipeline is effectively shortened by optimizing the length of the two parts, thereby the loss of frictional resistance caused by the interaction of the air current and the pipeline is reduced; the shape of shock wave in the compression region of the shock wave are designed as the oblique shock wave and the normal shock wave, thereby the strength of a single shock wave is weakened, the loss of the resistance of the shock wave is reduced, and the separation of boundary layers induced by the strong shock wave is avoided.
Description
Technical field
The present invention relates to the gas dehumidification technical field, be specifically related to the gas dehumidifying device with controllable supersonic speed of shock wave that dewaters, removes heavy hydrocarbon in a kind of natural gas processing field.
Background technology
Natural gas is a kind of efficient, clear energy sources, yet the natural gas that exploitation is come out contains a lot of impurity, must remove wherein steam and heavy hydrocarbon in order to satisfy the requirement of carrying and using.The dehydration technique that present domestic gas gathering and transportation system adopts mainly contains: the triethylene glycol dewatering system in long celebrating oil field, the J-T valve cryogenic separation system of Southwest Oil, the turbo-expander dewatering system of Daqing oil field, the molecular sieve dehydration and the cryogenic separation system in gas field, Tarim Basin, these technical equipment not only complex structure but also operating cost are high.By contrast, supersonic speed natural gas dehydrating unit need not chemical agent and personnel are on duty, and simple in structure, manufacturing, operating cost are low, and utilizes the import overbottom pressure work of natural gas, can be significantly energy-conservation; Especially when inlet pressure during greater than 7MP, compare with the decompressor dewatering system with J-T valve dewatering system, the ultrasonic dehydration device has more technical advantage and economic advantages.
To the concrete condition of China, in the higher area of temperature, the supersonic speed dehydrating unit can substitute traditional dewatering system, and after handling through it, the water dew point of natural gas can satisfy outer defeated requirement; For the lower area of temperature; The supersonic speed dehydrating unit also can substitute traditional dewatering system at temperature higher season fully; At low temperature season; It can be used as the preparatory dewatering system of conventional dehydration system, has so just reduced the load of conventional dehydration system greatly, thereby reduces investment and operating cost.
The Shell Oil Company take the lead in having carried out systematic research at the supersonic speed dehumidify field, and the Twister BV that itself and Beacom venture capital firm establish jointly is responsible for the business promotion of this technology and uses.Up to the present, Twister BV has announced and has promoted three important technology achievements in this field: the first generation supersonic speed cyclone separator of Twister BV be utilize big angle of sweep dalta wing induce the generation eddy flow.Because dalta wing is installed in the supersonic speed section, so shock loss and fricting resistance loss are bigger.And the existence of dalta wing makes the flow field very inhomogeneous, and it is not high with separative efficiency to condense.The two generation product Twister of Twister BV
TMAdopted the mode that adds guide-ring guiding eddy flow at inlet, Muscovite 3-S supersonic speed separator has also adopted same scheme, and this technology has obtained the popularization of international monopoly tissue.The product Twister SWIRL Vale of the up-to-date announcement of Twister BV is a kind of improved J-T valve, can in control flow and pressure, improve the separative efficiency of downstream separator.
According to the data published, domestic China Petroleum Univ. (East-China), Beijing University of Technology, three tame units of Jiang-Han Area petroleum machinery research institute have all accomplished preliminary numerical simulation and field trial, all are that dalta wing is induced the eddy flow scheme but it adopted; Dalian University of Technology adopts the homogeneous phase model that inlet eddy flow scheme has been carried out numerical simulation, does not announce relevant result of the test but see it; Xi'an Communications University induces two kinds of schemes of eddy flow and inlet eddy flow to carry out systematic research from numerical simulation and two aspects of field trial to dalta wing under the lasting subsidy of long celebrating Oilfield Company, has successively declared a plurality of national inventing patents.
Summary of the invention
The object of the present invention is to provide a kind of employing shock wave control technology, can effectively reduce the pressure loss and improve separative efficiency, the particularly significant gas dehumidifying device with controllable supersonic speed of shock wave of its advantage when big flow.
For achieving the above object; The technical scheme that the present invention adopts is: comprise the entrance that has inlet, converging transition, etc. the pipeline formed of straight section and expansion segment; Be provided with the central worm of band guide-ring at the entrance of pipeline; Form the circular passage between central worm and the pipeline of band guide-ring, and the circulation area of this circular passage of streamwise to be contracted in the venturi place earlier be that converging transition reaches minimum with the junction of waiting straight section, its value is A
t, to cross and to expand after i.e. enterings waits straight section after the venturi, the shock wave compressional zone of last end in central worm shrinks once more; The minimum flow area here is A, in the expansion segment of housing, is provided with liquid trap, forms liquid collecting cavity between liquid trap and the shell; And offer leakage fluid dram on this liquid collecting cavity; The center of liquid trap offers the exhaust passage, and eddy flow reclaims leaf grating and is installed in this passage, and the outlet of passage does.
2 °＜the β of the terminal angle of flare of central worm of the present invention＜8 °; The relation of the minimum flow area of shock wave compressional zone and venturi circulation area is 1.1A
t＜A＜1.5A
t, length L 1, L2 satisfy 0.5D＜L1＜D respectively, 6D＜L2, and wherein, L1 is the length of the equivalent section in shock wave compressional zone, and L2 is that central worm is terminal to waiting terminal distance of straight section, and D is for waiting internal diameter of straight section.
The end of central worm of the present invention is the shock wave compressional zone, makes that its downstream are the subsonic speed flow field.On the one hand, the subsonic speed flow field is because its speed is lower, grows up adequate time is provided so only need short pipeline promptly can be drop, promptly reduced the pipeline total length, thereby effectively reduced friction loss; On the other hand, thereby the flow field is adjusted, so to flow in the liquid collecting cavity porch unobstructed, gas-liquid separation effect good because the disturbance that the subsonic speed flow field can be caused downstream liquid collecting cavity stream field passes.The present invention has adopted the compress mode of oblique shock wave+normal shock wave in the shock wave compressional zone, weakened the intensity of single track shock wave, has not only effectively reduced the boundary-layer that once compresses the excessive drag due to shock wave loss that causes but also avoided intense shock wave to induce and has separated.Based on above unique design, the pressure loss of the present invention is little, separative efficiency is high, and advantage is particularly remarkable under big flow operating mode.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention;
Fig. 2 is the structural representation of shock wave of the present invention compressional zone;
Fig. 3 is the structural representation of central worm 2 of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done further explain.
Referring to Fig. 1; 2,3, the present invention includes have inlet 5 entrance 1-1, converging transition 1-2, etc. the pipeline 1 formed of straight section 1-3 and expansion segment 1-4; Be provided with the central worm 2 of band guide-ring 2-1 at the entrance 1-1 of pipeline 1; Form the circular passage between the central worm 2 of band guide-ring 2-1 and the pipeline 1, and the circulation area of this circular passage of streamwise to be contracted in venturi 6 places earlier be that converging transition 1-2 reaches minimum with the junction of waiting straight section 1-3, it is worth is A
t, to cross and to expand after i.e. entering wait straight section 1-3 after the venturi 6, the shock wave compressional zone 7 of last end in central worm 2 shrinks once more; The minimum flow area here is A, in the expansion segment 1-4 of housing 1, is provided with liquid trap 3, forms liquid collecting cavity 8 between liquid trap 3 and the shell; And offer leakage fluid dram 9 on this liquid collecting cavity; The center of liquid trap offers the exhaust passage, and eddy flow reclaims leaf grating 4 and is installed in this passage, and the outlet of passage is 10; 2 °＜the β of the terminal 2-2 angle of flare of central worm 2＜8 °, the relation of the minimum flow area of shock wave compressional zone 7 and venturi circulation area is 1.1A
t＜A＜1.5A
t, length L 1, L2 satisfy 0.5D＜L1＜D respectively, 6D＜L2, and wherein, L1 is the length of the equivalent section in shock wave compressional zone, and L2 is that central worm 2 is terminal to waiting terminal distance of straight section, and D is for waiting internal diameter of straight section.
Air-flow is from 5 entering that enter the mouth, and the powerful rotation of generation under the guiding of guide-ring 2-1, because the contraction gradually of annular circulation area, the flow expansion acceleration reaches velocity of sound at venturi place 6, and then the expansion air-flow along with annular circulation area accelerates to supersonic speed.At the terminal 2-2 of central worm 2 are shock wave compressional zones 7, and supersonic airstream decelerates to subsonic speed under the compression of oblique shock wave and normal shock wave.The subsonic speed section of drop in downstream continues to grow up and under centrifugal action, moves to the pipeline outside; Last liquid phase gets into liquid collecting cavity 8 and is discharged by leakage fluid dram 9; Gas phase gets into the discharge chamber of liquid trap and under the effect of eddy flow recovery leaf grating 4, converts rotation function into the pressure ability, is discharged by exhaust outlet 10 at last.
The controllable supersonic speed of shock wave dehydrating unit that is 400,000 mark sides with a day output is an example below, and structure of the present invention and operation principle are further explained.
With reference to accompanying drawing 2, internal diameter of outer cover is D=30mm, L1=0.6D=18mm, L2=8D=240mm β=5 °, A=1.2A
t
With reference to accompanying drawing 1, air-flow 5 gets into from entering the mouth, and under the effect of guide-ring 2-1, produces rotation, because the circulation area of circular passage is shunk, the air-flow acceleration also reaches velocity of sound at venturi place 6 subsequently; Circulation area expansion after the venturi, air-flow reaches supersonic speed, and temperature reduces significantly, and drop begins to condense and grow up.Supersonic airstream arrives shock wave compressional zone 7 and successively decelerates to subsonic speed through the compression of oblique shock wave and normal shock wave, and drop continues to grow up in the subsonic area, and under the centrifugal action that eddy flow produces, moves to the pipeline outside.Last liquid phase gets into liquid collecting cavity 8 and is discharged by leakage fluid dram 9; The discharge chamber at dry gas entering liquid trap center converts rotation function into pressure and can discharge from exhaust outlet 10 at last under the effect of eddy flow recover 4.Dehumidification process is accomplished.
Claims (1)
1. gas dehumidifying device with controllable supersonic speed of shock wave; It is characterized in that: comprise the entrance (1-1) that has inlet (5), converging transition (1-2), etc. the pipeline (1) formed of straight section (1-3) and expansion segment (1-4); Entrance (1-1) in pipeline (1) is provided with the central worm (2) of band guide-ring (2-1); Form the circular passage between the central worm (2) of band guide-ring (2-1) and the pipeline (1); And it is converging transition (1-2) and the junction of waiting straight section (1-3) reaches minimum that the circulation area of this circular passage of streamwise is contracted in earlier that venturi (6) locates, and its value is A
t, cross venturi (6) i.e. enterings afterwards and wait straight section (1-3) back to expand, shrink once more in the shock wave compressional zone (7) of the end (2-2) of central worm (2) at last; The minimum flow area here is A, in the expansion segment (1-4) of pipeline (1), is provided with liquid trap (3), forms liquid collecting cavity (8) between liquid trap (3) and the shell; And offer leakage fluid dram (9) on this liquid collecting cavity; The center of liquid trap offers the exhaust passage, and eddy flow reclaims leaf grating (4) and is installed in this passage, and passage has outlet (10); 2 °＜the β of the terminal angle of flare of said central worm (2)＜8 °; The minimum flow area of said shock wave compressional zone (7) and the relation of venturi circulation area are 1.1A
t＜A＜1.5A
t, length L 1, L2 satisfy 0.5D＜L1＜D respectively, 6D＜L2, and wherein, L1 is the length of the equivalent section in shock wave compressional zone, and L2 is that central worm 2 is terminal to waiting terminal distance of straight section, and D is for waiting internal diameter of straight section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100243479A CN101700456B (en) | 2009-10-16 | 2009-10-16 | Gas dehumidifying device with controllable supersonic speed of shock wave |
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|---|---|---|---|
| CN2009100243479A CN101700456B (en) | 2009-10-16 | 2009-10-16 | Gas dehumidifying device with controllable supersonic speed of shock wave |
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| CN101700456A CN101700456A (en) | 2010-05-05 |
| CN101700456B true CN101700456B (en) | 2012-05-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109569155A (en) * | 2018-11-30 | 2019-04-05 | 天津大学 | A kind of combined type supersonic gas condensation separating unit |
| CN113769913A (en) * | 2021-08-19 | 2021-12-10 | 浙江大学 | Ejector |
| CN114776390B (en) * | 2022-04-21 | 2023-06-20 | 西安交通大学 | Last-stage stationary blade dehumidification structure based on ultrasonic waves |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5306330A (en) * | 1990-08-10 | 1994-04-26 | Athanasios Nasikas | Method and mechanism for the supersonic separation of droplets from a gas stream |
| CN1261814A (en) * | 1997-07-02 | 2000-08-02 | 国际壳牌研究有限公司 | Removing gaseous component from fluid |
| CN101380537A (en) * | 2008-10-17 | 2009-03-11 | 北京工业大学 | Low flow resistance supersonic speed gas purification and separation device |
| CN101518709A (en) * | 2009-04-10 | 2009-09-02 | 中国石油天然气股份有限公司 | Transonic speed controllable vortex gas dehumidifying device |
-
2009
- 2009-10-16 CN CN2009100243479A patent/CN101700456B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5306330A (en) * | 1990-08-10 | 1994-04-26 | Athanasios Nasikas | Method and mechanism for the supersonic separation of droplets from a gas stream |
| CN1261814A (en) * | 1997-07-02 | 2000-08-02 | 国际壳牌研究有限公司 | Removing gaseous component from fluid |
| CN101380537A (en) * | 2008-10-17 | 2009-03-11 | 北京工业大学 | Low flow resistance supersonic speed gas purification and separation device |
| CN101518709A (en) * | 2009-04-10 | 2009-09-02 | 中国石油天然气股份有限公司 | Transonic speed controllable vortex gas dehumidifying device |
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