CN103611478A - Pipeline type experiment device for generating gas hydrate - Google Patents
Pipeline type experiment device for generating gas hydrate Download PDFInfo
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Abstract
The invention belongs to the technical field of application, storage and transportation of gas hydrates, relates to an experiment device and particularly relates to a pipeline type experiment device for generating a gas hydrate. The pipeline type experiment device comprises a gas-liquid conveying system, a cooling system and a hydrate pipeline generation system, wherein the gas-liquid conveying system comprises a gas bottle, a bottle storage tank, a discharging opening I, a centrifugal pump, a liquid flow meter, a compressor, a gas flow meter, a separator and a buffering tank; the cooling system comprises a cooling tank, a discharging opening II, a cooling water bath I and a cooling water bath II; the hydrate pipeline generation system comprises a chemical feed opening, a micro-bubble generator, a connection flange, a twisted strip type spiral generator, a temperature sensor, a pressure sensor, a differential pressure meter, an observation window and an experiment pipe section. The whole set of the experiment device is convenient to operate and low in operation cost; the requirements of hydrate slurry generation and flowing principle experiments are met.
Description
Technical field
The invention belongs to gas hydrate application and storaging and transport technology field, relate to a kind of experimental provision, a kind of duct type gas hydrate generates experimental provision more precisely.
Background technology
Gas hydrate refers to light gas, as: methane, ethane, propane, CO
2, H
2s etc. and the non-stoichiometric solid crystal material of water in uniform temperature and the lower generation of pressure (being generally cryogenic high pressure).Day by day deep along with gas hydrate research, particularly gas hydrate generates the development of the research of promotion aspect, and gas hydrate technology manifests day by day in the application prospect of the aspects such as natural gas accumulating, mist separation.But hydrate is closely related with the facilitation of gas hydrate in the application in these fields.The obstruction of the factor such as be subject to that gas storage density is low, formation speed is slow and induction time is long, the maximum technology barrier that especially current Application of Hydrate technology faces is exactly generating rate and the efficiency that how to improve hydrate.For example, methane pressure in static pure aquatic system is 5.76MPa, temperature while being 4.3 ℃, forms the induction time of hydrate more than 28 hours, and the speed of growth of hydrate crystal is slow, directly affects the popularization that hydrate utilizes technology.In the experiment of gas hydrate, the simulation experiment study of the features such as the forming process feature of gas hydrate, hydrate slurry flowing law is basis and the precondition that research hydrate formation mechanism and gas hydrate are applied at other field.For addressing these problems, several different methods promotes the technology of the formation of hydrate to be found out: by stirring the speed of growth that can improve hydrate, brought again some other unfavorable factors: energy consumption increase, the reduction of hydrate gas storage density etc. but stir; Adopt ultrasonic atomization, increase gas-liquid contact area, can improve hydrate formation speed, but not only investment cost increase of the ultrasonic ultrasonic delay line memory that system is added, and also operating cost also increases; In hydrate formation system, adding some additives can promote hydrate to generate, improve the hydrate speed of growth, what research was more both at home and abroad is in water, to add anion surfactant, as lauryl sodium sulfate (SDS), oxolane etc., can make hydrate form induction time and shorten to 1-1.5 hour, pressure reduces 1-2MPa compared with pure aquatic system.Yet, although this class surfactant can make hydrate formation speed accelerate, or can not be satisfactory.
Four main process of nucleation-crystallite-crystallization-assemble are generally experienced in the formation of gas hydrate.Hydrate nucleation refers in being hydrated the oversaturated solution of thing formation gas and forms a kind of process with nucleus critical dimension, stable.When solution is during in supercooled state or hypersaturated state, just may there is nucleation.Hydrate formation feature is to be one of the focus of hydrate research and difficult point always.Increase along with ocean natural gas Exploitation Depth, the gas hydrates blockage problem of mixed transporting tube line more and more comes into one's own, hydrate slurry flow technique is the new technology of deep water flow assurance technology, and the flow behavior of research hydrate slurry is to realize the important foundation of Submarine Pipeline transferring technology large-scale industrial application.Nowadays, how to carry out the technological design of hydrate slurry feed-line in the world still in research frontier, the research of hydrate slurry flowing law is the basis of feed-line technological design, at present only there is minority scholar to carry out some quantitative experimental study work, but because used experimental facilities, medium, condition all have difference, also do not reach common understanding in theory, about the document of gas hydrate slurries two-phase flow still less, so this respect research work is anxious treats deeply.
Based on above situation, the hydrate that the present invention can realize under laboratory condition generates fast, and the feature that research hydrate generates, the more important thing is the flow feature that can observe hydrate slurry, sum up the flowing law of research hydrate slurry, for actual Natural Gas Pipeline Transportation provides guidance.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, provide a kind of duct type gas hydrate to generate experimental provision.
The present invention is for achieving the above object, adopt following technical measures: a kind of duct type gas hydrate generates experimental provision, it comprises gas-liquid induction system, cooling system and hydrate pipeline generation system, wherein, gas-liquid induction system comprises gas cylinder, air accumulator, scavenge port one, centrifugal pump, fluid flowmeter, compressor, gas flowmeter, separator and surge tank; Cooling system comprises cooler bin, scavenge port two, cold bath one and cold bath two; Hydrate pipeline generation system comprises dosing mouth, microbubble generator, adpting flange, twisted strip formula spiral flow generator, temperature sensor, pressure sensor, differential manometer, observation window and experiment pipeline section; Described air accumulator is provided with scavenge port one, and is connected with gas cylinder, separator and compressor respectively; Described cooler bin is provided with scavenge port two, and is connected with centrifugal pump, and the water of cooler bin is as liquid phase, and liquid phase enters experiment pipeline section through centrifugal pump, and wherein fluid flowmeter carries out Real-Time Monitoring to liquid velocity; Pipeline set in described cold bath one passes through cooler bin and is recycled to cold bath one, and a pair of cooler bin of cold bath is lowered the temperature, and makes temperature reduce to 1～5 ℃; Described centrifugal pump is connected with fluid flowmeter; Described microbubble generator is connected by pipeline with fluid flowmeter, and on pipeline, be provided with dosing mouth, prevent that microbubble generator from producing bubble generation coalescence phenomenon, and be connected with bond type spiral flow generator by adpting flange, and be connected by gas flowmeter with compressor, microbubble generator is mainly to consist of metal micro-holes pipe, the diameter of metal micro-holes pipe is 20～40mm, length 100～300mm, minimum-value aperture 0.3um, percent opening 40-70%, it is the porous material being formed by metal powder sintered, even aperture distribution, breathe freely, mechanical strength is high; Described experiment pipeline section top is provided with temperature sensor, pressure sensor and differential manometer, left side is connected with bond type spiral flow generator, below and right side are connected by pipeline with separator respectively, experiment pipeline section is the horizontal pipeline section consisting of high-boron-silicon glass pipe, length is 2000-10000mm, and internal diameter is 20-100mm.Outside with one layer of heat preservation layer, and observation window is set; One end of described cold bath two is connected with experiment pipeline section, the pipeline that the other end is also connected with separator with experiment pipeline section when being connected with separator is connected, two pairs of experiment pipeline sections of cold bath are lowered the temperature, and make temperature be controlled at 1～5 ℃, and in pipe, temperature is by temperature sensor Real-Time Monitoring; One end of described surge tank is connected with cooler bin, and the other end is connected with separator, and the hydrate in pipeline enters separator through pipe outlet, separator contains observation window, and by cold bath two, to its cooling, make its temperature be controlled at 2～5 ℃, simultaneously the decomposition situation of Observable hydrate.Hydrate becomes gas and water after decomposing, and gas is got back to gas storage tank by gas phase pipeline, and first the liquid that sub-argument goes out pass through surge tank, finally enters cooler bin, and cooler bin disposes scavenge port two.
The device for cleaning pipeline supercooling case that described air accumulator is connected with compressor.
Described microbubble generator mainly consists of metal micro-holes pipe.
Described experiment pipeline section is provided with observation window.
Between described all parts, be all to connect by pipeline, and be equipped with control valve or switch.
Remarkable advantage of the present invention is:
1. adopt microbubble formula generating means, can improve hydrate formation speed.
2. adopt high-boron-silicon glass pipe, realize the observation directly perceived of pipeline, can carry out the mobile observation of hydrate.
3. dosing mouth is set, adds surfactant, prevent the coalescence of microbubble, keep gas-liquid contact area.
4. investment cost and operating cost are low.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further elaborated.
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is the microbubble generator schematic diagram in the present invention.
1. air accumulator 2. gas cylinder 3. scavenge port one 4. cooler bin 5. scavenge port 2 6. cold bath one 7. centrifugal pump 8. fluid flowmeter 9. compressor 10. gas flowmeter 11. dosing mouth 12. microbubble generator 13. temperature sensor 14. pressure sensor 15. differential manometer 16. observation window 17. experiment pipeline section 18. adpting flange 19. bond type spiral flow generator 20. cold bath 2 21. separator 22. surge tanks in figure.
The specific embodiment
A kind of duct type gas hydrate as shown in Figure 1 and Figure 2 generates experimental provision, it comprises gas-liquid induction system, cooling system and hydrate pipeline generation system, wherein, gas-liquid induction system comprises gas cylinder 2, air accumulator 1, scavenge port 1, centrifugal pump 7, fluid flowmeter 8, compressor 9, gas flowmeter 10, separator 21 and surge tank 22; Cooling system comprises cooler bin 4, scavenge port 25, cold bath 1 and cold bath 2 20; Hydrate pipeline generation system comprises dosing mouth 11, microbubble generator 12, adpting flange 18, twisted strip formula spiral flow generator 19, temperature sensor 13, pressure sensor 14, differential manometer 15, observation window 16 and experiment pipeline section 17; Described air accumulator 1 is provided with scavenge port 1, and is connected with gas cylinder 2, separator 21 and compressor 9 respectively; Described cooler bin 4 is provided with scavenge port 25, and is connected with centrifugal pump 7; Pipeline set in described cold bath 1 passes through cooler bin 4 and is recycled to cold bath 1; Described centrifugal pump 7 is connected with fluid flowmeter 8; Described microbubble generator 12 is connected by pipeline with fluid flowmeter 8, and on pipeline, is provided with dosing mouth 11, and is connected with bond type spiral flow generator 19 by adpting flange 18, and is connected by gas flowmeter 10 with compressor 9; Described experiment pipeline section 17 tops are provided with temperature sensor 13, pressure sensor 14 and differential manometer 15, and left side is connected with bond type spiral flow generator 19, and below and right side are connected by pipeline with separator 21 respectively; One end of described cold bath 2 20 is connected with experiment pipeline section 17, and the pipeline that the other end is also connected with separator 21 with experiment pipeline section 17 when being connected with separator 21 is connected; One end of described surge tank 22 is connected with cooler bin 4, and the other end is connected with separator 21.
First experiment use gas be stored in gas cylinder 2, while starting to test, by gas cylinder 2 switch opens, gas enters in air accumulator 1 with pipeline, in experiment, one 6 pairs of cooler bins 4 of cold bath are lowered the temperature, and make temperature reduce to 1～5 ℃, and the water of cooler bin 4 is as liquid phase, liquid phase enters experiment pipeline section 17 through centrifugal pump 7, and wherein 8 pairs of liquid velocities of fluid flowmeter carry out Real-Time Monitoring; The gas of coming from air accumulator 1 is lowered the temperature through cooler bin 4, and then, by compressor 9 input microbubble generators 12, in process, gas flow carries out Real-Time Monitoring by gas flowmeter 10; Microbubble generator 12 is mainly to consist of metal micro-holes pipe, and the diameter of metal micro-holes pipe is 20～40mm, length 100～300mm, minimum-value aperture 0.3um, percent opening 40-70%, it is the porous material being formed by metal powder sintered, even aperture distribution, breathe freely, mechanical strength is high; The shear flow that the liquid phase fluid of being inputted by centrifugal pump 7 in pipe flows through is taken away the bubble producing, and the microbubble producing improves a lot to the contact area between gas-liquid two-phase; For preventing that microbubble generator 12 from producing bubble generation coalescence phenomenon, one dosing mouth 11 is set after fluid flowmeter 8 on liquid phase pipeline, in experimentation, by dosing mouth 11, add surfactant, as lauryl sodium sulfate (SDS), neopelex (SDBS) or both solution mixing by a certain percentage etc., can prevent the coalescence of microbubble, and keep the size of microbubble.The gas-liquid two-phase spiral flow being now comprised of microbubble forms gas-liquid two-phase spiral flow through twisted strip formula spiral flow generator 19, the formation of spiral flow further improves the contact area between two-phase, for the formation of hydrate or hydrate slurry provides sufficient condition.2 20 pairs of experiment pipeline sections 17 of cold bath are lowered the temperature, and make temperature be controlled at 1～5 ℃, and in pipe, temperature is by temperature sensor 13 Real-Time Monitorings; Valve after experiment pipeline section 17 is controlled pipeline section internal pressure, maintains 2～4MPa, and overpressure is by pressure sensor 14 Real-Time Monitorings.Pipeline section pressure drop is measured by differential manometer 15.Experiment pipeline section is the horizontal pipeline section consisting of high-boron-silicon glass pipe, and length is 2000-10000mm, and internal diameter is 20-100mm.Outside with one layer of heat preservation layer, and observation window 16 is set.When the gas-liquid two-phase spiral flow that contains microbubble passes through the experiment pipeline section 17 of cryogenic high pressure, hydrate forms rapidly in pipeline, and in pipeline, hydrate flows forward with forms such as slurry or powderies, observes the flowing law of hydrate slurries by observation window 16.Hydrate in pipeline enters separator 21 through pipe outlet, and separator 21 contains observation window 16, and by cold bath 2 20, it is lowered the temperature, and makes its temperature be controlled at 2～5 ℃, simultaneously the decomposition situation of Observable hydrate.Hydrate becomes gas and water after decomposing, and gas is got back to gas storage tank 1 by gas phase pipeline, and first the liquid that sub-argument goes out pass through surge tank 22, finally enters cooler bin 4, and cooler bin 4 disposes scavenge port 25.
In experimentation, by controlling the temperature and pressure of gas-liquid two-phase flow velocity and experiment pipeline section 17, control and observe the generation of gas hydrate, microbubble generator 12 and surfactant promote the generation of microbubble jointly, and prevent the coalescence of microbubble, guarantee to there is larger contact area between gas-liquid two-phase, hydrate slurry is generated fast in pipeline.A whole set of experimental provision is easy to operate, and operating cost is lower, meets the requirement that hydrate slurry generates and flowing law is tested.
Claims (5)
1. a duct type gas hydrate generates experimental provision, it comprises gas-liquid induction system, cooling system and hydrate pipeline generation system, wherein, gas-liquid induction system comprises gas cylinder (2), air accumulator (1), scavenge port one (3), centrifugal pump (7), fluid flowmeter (8), compressor (9), gas flowmeter (10), separator (21) and surge tank (22); Cooling system comprises cooler bin (4), scavenge port two (5), cold bath one (6) and cold bath two (20); Hydrate pipeline generation system comprises dosing mouth (11), microbubble generator (12), adpting flange (18), twisted strip formula spiral flow generator (19), temperature sensor (13), pressure sensor (14), differential manometer (15), observation window (16) and experiment pipeline section (17), it is characterized in that: described air accumulator (1) is provided with scavenge port one (3), and be connected with gas cylinder (2), separator (21) and compressor (9) respectively; Described cooler bin (4) is provided with scavenge port two (5), and is connected with centrifugal pump (7); The upper set pipeline of described cold bath one (6) is through cooler bin (4) and be recycled to cold bath one (6); Described centrifugal pump (7) is connected with fluid flowmeter (8); Described microbubble generator (12) is connected by pipeline with fluid flowmeter (8), and on pipeline, be provided with dosing mouth (11), and be connected with bond type spiral flow generator (19) by adpting flange (18), and be connected by gas flowmeter (10) with compressor (9); Described experiment pipeline section (17) top is provided with temperature sensor (13), pressure sensor (14) and differential manometer (15), and left side is connected with bond type spiral flow generator (19), and below and right side are connected by pipeline with separator (21) respectively; One end of described cold bath two (20) is connected with experiment pipeline section (17), and the pipeline that the other end is also connected with separator (21) with experiment pipeline section (17) when being connected with separator (21) is connected; One end of described surge tank (22) is connected with cooler bin (4), and the other end is connected with separator (21).
2. by a kind of duct type gas hydrate claimed in claim 1, generate experimental provision, it is characterized in that: the device for cleaning pipeline supercooling case (4) that described air accumulator (1) is connected with compressor (9).
3. by a kind of duct type gas hydrate claimed in claim 1, generate experimental provision, it is characterized in that: described microbubble generator (12) mainly consists of metal micro-holes pipe.
4. by a kind of duct type gas hydrate claimed in claim 1, generate experimental provision, it is characterized in that: described experiment pipeline section (17) is provided with observation window (16).
5. by a kind of duct type gas hydrate claimed in claim 1, generate experimental provision, it is characterized in that: between described all parts, be all to connect by pipeline, and be equipped with control valve or switch.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267150A (en) * | 2014-09-29 | 2015-01-07 | 常州大学 | Novel experimental device for generating gas hydrate |
| CN107907560A (en) * | 2017-12-01 | 2018-04-13 | 北京航天试验技术研究所 | A kind of test method for water crystallization situation of dissociating under research different temperatures in kerosene |
| CN108014740A (en) * | 2017-12-21 | 2018-05-11 | 常州大学 | A kind of new gas hydrate pipeline generating means |
| CN110359885A (en) * | 2018-01-16 | 2019-10-22 | 西南石油大学 | A kind of atomizer and speed column combined water drain gas production imitative experimental appliance |
| CN110487508A (en) * | 2019-08-20 | 2019-11-22 | 常州大学 | A kind of experimental provision for research level pipe gas-liquid two-phase spiral flow |
| CN111239361A (en) * | 2020-01-20 | 2020-06-05 | 中国石油大学(华东) | Accurate measurement device for hydrate generation induction time and application thereof |
| CN112426990A (en) * | 2020-10-23 | 2021-03-02 | 大连理工大学 | Device and method for promoting hydrate generation by nano bubbles |
| CN112705132A (en) * | 2020-12-08 | 2021-04-27 | 西安石油大学 | Gas hydrate rapid and continuous generation and cake making device and method |
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| CN101818088A (en) * | 2009-12-15 | 2010-09-01 | 江苏工业学院 | Efficient continuous preparation method and device for natural gas hydrate |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267150A (en) * | 2014-09-29 | 2015-01-07 | 常州大学 | Novel experimental device for generating gas hydrate |
| CN104267150B (en) * | 2014-09-29 | 2016-04-13 | 常州大学 | A kind of new gas hydrate generates experimental provision |
| CN107907560A (en) * | 2017-12-01 | 2018-04-13 | 北京航天试验技术研究所 | A kind of test method for water crystallization situation of dissociating under research different temperatures in kerosene |
| CN108014740A (en) * | 2017-12-21 | 2018-05-11 | 常州大学 | A kind of new gas hydrate pipeline generating means |
| CN110359885A (en) * | 2018-01-16 | 2019-10-22 | 西南石油大学 | A kind of atomizer and speed column combined water drain gas production imitative experimental appliance |
| CN110487508A (en) * | 2019-08-20 | 2019-11-22 | 常州大学 | A kind of experimental provision for research level pipe gas-liquid two-phase spiral flow |
| CN111239361A (en) * | 2020-01-20 | 2020-06-05 | 中国石油大学(华东) | Accurate measurement device for hydrate generation induction time and application thereof |
| CN112426990A (en) * | 2020-10-23 | 2021-03-02 | 大连理工大学 | Device and method for promoting hydrate generation by nano bubbles |
| CN112705132A (en) * | 2020-12-08 | 2021-04-27 | 西安石油大学 | Gas hydrate rapid and continuous generation and cake making device and method |
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Effective date of registration: 20201224 Address after: 221400 building B2, science and innovation base, No.9 Zhejiang Road, Xinyi Economic Development Zone, Xuzhou City, Jiangsu Province Patentee after: Jiangsu zhuoken Intellectual Property Operation Co.,Ltd. Address before: 213164 No. 1, middle Lake Road, Wujin District, Changzhou, Jiangsu Patentee before: CHANGZHOU University |