CN102519991A - Natural gas hydrate heat transfer performance testing apparatus used in X-ray CT equipment - Google Patents
Natural gas hydrate heat transfer performance testing apparatus used in X-ray CT equipment Download PDFInfo
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- CN102519991A CN102519991A CN2011104284615A CN201110428461A CN102519991A CN 102519991 A CN102519991 A CN 102519991A CN 2011104284615 A CN2011104284615 A CN 2011104284615A CN 201110428461 A CN201110428461 A CN 201110428461A CN 102519991 A CN102519991 A CN 102519991A
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Abstract
The invention relates to a natural gas hydrate heat transfer performance testing apparatus used in X-ray CT equipment. The invention belongs to the technical field of petroleum scientific research apparatus. The apparatus can be used for simulating in-situ formation of rock core natural gas hydrate, and can be arranged on a rotary object stage of X-ray CT equipment for testing the heat transfer performance. A designed pressure is 0-20MPa, and a designed temperature is -20 to 30 DEG C. For reducing the inferences on X-ray CT equipment imaging, a titanium alloy material is adopted in the integral apparatus. Also, the apparatus is designed as a double-layer sleeved cylinder structure. With an inner cylinder, pressure for natural gas hydrate in-situ formation is ensured. With a circulated cooling agent in the interlayer, the temperature of the inner cylinder is controlled. Multi-point measuring thermal resisters are annularly arranged in the inner cylinder. Signal intensity of collected X-ray CT images and data information acquired by the thermal resisters are analyzed, such that related conclusion of the natural gas hydrate heat transfer performance is obtained. The structure of apparatus is reasonably designed, such that equipment parameter requirements of the apparatus are satisfied. The function is comprehensive, and the operation is simple.
Description
Technical field
The present invention relates to a kind of gas hydrate heat transfer property proving installation that is used for X ray CT equipment, belong to oil scientific research Instrument technology field.
Background technology
X ray CT (X-ray Computed Tomography) technology is a kind of computer tomography technology; Send and receive ray signal through x ray generator and X ray detector; Utilize the different densities material different with transmitance to the absorption of X ray; After through robot calculator data being handled, can obtain the tomography or the stereo-picture of object to be detected.This technology can be used for analyzing basic rerum naturas such as natural core, simulation core gas hydrate bone framework and factor of porosity, permeability, saturation degree; Can generate simultaneously gas hydrate, gas, water flows and heat transfer characteristic in the decomposable process study, and three-dimensional synchronously visual demonstration.Research for heat transfer property; Mainly be saturation degree and the 3 D stereo distribution that obtains the diverse location hydrate through radioscopic image; And extrapolate information such as the heat of transformation, reaction heat thus, obtain parameters such as effective heat transfer coefficient that hydrate generated, decomposed transient, quantity of heat production through analytical calculation in conjunction with the data of thermistor collection.Traditional natural gas hydrate basis rerum natura, flowing heat transfer characteristic research use the water-bath temperature control usually; To reach the gas hydrate generation or to decompose temperature required; But for X ray CT equipment; The use of traditional water bath both can't have been satisfied the requirement of objective table size and quality, inevitably x-ray imaging was produced bigger interference again.In addition, the test of traditional natural gas hydrate heat transfer property only depends on data acquisition usually, combines seldom with visual instrument and equipment, can't be from microscale three-dimensional heat transfer property is studied directly perceived.Also do not appear in the newspapers about the gas hydrate heat transfer property proving installation that is applicable to X ray CT equipment at present.
Summary of the invention
In order to solve the problem that exists in the above Study on Heat Transfer; The present invention provides a kind of gas hydrate heat transfer property proving installation that is used for X ray CT equipment; Its objective is under the prerequisite of not using traditional water bath; Reach temperature control, and the Study on Heat Transfer of gas hydrate is combined with visual instrument, satisfy the parameter request of X ray CT equipment simultaneously hydrate generation, decomposable process.
The technical scheme that the present invention adopts is:
Be used for the gas hydrate heat transfer property proving installation of X ray CT equipment, it comprises air intake opening, thermistor, end cap, O RunddichtringO, urceolus, coolant outlet, inner core, pressure transducer, bolt, gas outlet, coolant entrance.Wherein, two end caps and inner core are through the sealing function of bolted and O RunddichtringO, and at the inner high pressure resistant reaction chamber that forms sealing of inner core, the original position of carrying out gas hydrate generates.Can simulate generation, the decomposition of core gas hydrate.Constitute hollow sandwich between two end caps and the inside and outside tube, wherein feed the circulating coolant low temperature nitrogen, control inner core temperature.In temperature control, reduce interference to greatest extent to x-ray imaging.Be Crossed Circle at upper end cover and arranged the multimetering thermistor,, be used for the research of heat transfer property through radially axial difference is carried out the measurement of correlation parameter; At bottom end cover pressure transducer has been installed, in order to the monitoring chamber pressure.Air intake opening is used for the rock gas high pressure and injects, and the gas outlet is used for the exhaust and the pressure release of rock gas.The whole titanium alloy material that adopts of this device.
Above-mentioned proving installation is placed on the X ray CT equipment rotatable stage; In reaction chamber, accomplish the generation and the decomposition of simulation core gas hydrate; Accomplish temperature control through the cooling medium in the interlayer, the X ray signal that the X ray detector receives is analyzed, obtain reaction chamber inner tomography or stereo-picture; Through image is combined the heat transfer property of the generation of research gas hydrate, decomposition transient with heat transfer model.
The invention has the beneficial effects as follows: be applicable to X ray CT equipment; The temperature, pressure design meets gas hydrate generation, decomposition condition; When gas hydrate transient heat transfer property is studied, avoided the use of traditional water bath, to reduce interference to x-ray imaging.Constitute sandwich construction between the inside and outside tube, wherein feed circulating coolant, with control inner core temperature.The multiple spot thermistor is arranged ringwise, helps the foundation of interior three-dimensional heat transfer model.One-piece construction adopts the titanium alloy material, to satisfy the requirement of objective table to quality, reduces the interference to x-ray imaging simultaneously.The structural design compact and reasonable satisfies the instrument and equipment parameter request, and complete function is simple to operation.
Description of drawings
Fig. 1 is the gas hydrate heat transfer property proving installation master cut-open view that is used for X ray CT equipment.
Fig. 2 is this device vertical view A-A.
Fig. 3 is this device upward view B-B.
Fig. 4 is the left cut-open view C-C in this installation drawing 2.
Among the figure: 1 air intake opening, 2 thermistors, 3 end caps, 4O RunddichtringO, 5 urceolus, 6 coolant outlets, 7 inner cores, 8 pressure transducers, 9 bolts, 10 interlayers, 11 gas outlets, 12 coolant entrances.
Embodiment
Fig. 1-4 has showed a kind of gas hydrate heat transfer property proving installation that is used for X ray CT equipment, and this device is whole to be made up of two end caps and inner and outer sleeves.End cap and inner core constitute high pressure resistant reaction chamber, wherein can simulate the generation and the decomposition of core gas hydrate.Be Crossed Circle at upper end cover and arranged the multimetering thermistor, be used for the research of heat transfer property, pressure transducer has been installed, in order to the monitoring chamber pressure at bottom end cover.Constitute hollow sandwich between end cap and the inside and outside tube, wherein feed circulating coolant, control inner core temperature.Air intake opening is used for the gas high pressure and injects, and the gas outlet is used for exhaust and pressure release.
Utilize the step of above-mentioned heat transfer property proving installation following:
The first step, back-up sand manufacturing and simulating core.The gas outlet is closed, in reaction chamber, evenly added glass sand and deionized water, the back-up sand process is noted the even mixing of glass sand and water, can replace adding on a small quantity, and constantly stirs and knock, and removes the residual air in the porous medium.
In second step, sealing and pipeline connect.With end cap seal; Guarantee that bolted and device leakproofness are good; Thermistor, pressure transducer wiring are connected with data acquisition module and be connected computing machine; Cooling medium import and export and external temperature control bath and ebullator are connected, air intake opening is connected with gas cylinder, can use decompressor and pressure regulator valve that admission pressure is controlled.
The 3rd step, gas injection, temperature control.Inject methane gas to reaction chamber; Stop gas injection after reaching experimental pressure,, generate or the decomposition water compound through regulating coolant temperature control reaction with inlet close; Translation or rotatable stage; Gather X ray information through the X ray detector, generate the tomography or the stereo-picture of the different moment, diverse location, and obtain the data message of thermistor through data acquisition module.
The 4th step, data acquisition.The collection of question response complete data finishes, and carries out pressure release through air inlet/outlet, methane gas is discharged outdoor, and cooling medium is discharged, and breaks off the wiring of thermistor, pressure transducer, opens the reaction unit end cap, and glass sand is cleaned up.
The 5th step, data analysis.Through different tomographies or the three-dimensional radioscopic image that obtains; Utilize PaintShop; Can obtain the distribution of gas hydrate saturation degree by signal intensity; And then learn information such as the heat of transformation, reaction heat, in conjunction with the data and the heat transfer model of thermistor, can obtain parameters such as gas hydrate generate, the effective heat transfer coefficient of decomposition transient, quantity of heat production.
Claims (3)
1. a gas hydrate heat transfer property proving installation that is used for X ray CT equipment comprises air intake opening (1), thermistor (2), end cap (3), O RunddichtringO (4), urceolus (5), coolant outlet (6), inner core (7), pressure transducer (8), bolt (9), gas outlet (11), coolant entrance (12); It is characterized in that two end caps and inner core at the inner high pressure resistant reaction chamber that forms sealing of inner core, carry out the original position generation of gas hydrate through bolt and O RunddichtringO; Constitute hollow sandwich between two end caps and the inside and outside tube, wherein feed the circulating coolant low temperature nitrogen, control inner core temperature; Be Crossed Circle at upper end cover and arranged the multimetering thermistor,, be used for the research of heat transfer property through radially axial difference is carried out the measurement of correlation parameter; At bottom end cover pressure transducer has been installed, in order to the monitoring chamber pressure; Air intake opening is used for the rock gas high pressure and injects, and the gas outlet is used for the exhaust and the pressure release of rock gas.
2. a kind of gas hydrate heat transfer property proving installation that is used for X ray CT equipment according to claim 1 is characterized in that, this device adopts the titanium alloy material.
3. utilize the described gas hydrate heat transfer property of claim 1 proving installation, its characteristic comprises the steps:
The first step, back-up sand manufacturing and simulating core; The gas outlet is closed, in reaction chamber, evenly added glass sand and deionized water, the back-up sand process is noted the even mixing of glass sand and water, alternately adds, and constantly stirs and knock, and removes the residual air in the porous medium;
In second step, sealing and pipeline connect; With end cap seal; Guarantee bolted and install airtight; Thermistor, pressure transducer wiring are connected with data acquisition module and be connected computing machine; Cooling medium import and export and external temperature control bath and ebullator are connected, air intake opening is connected with gas cylinder, use decompressor and pressure regulator valve that admission pressure is controlled;
The 3rd step, gas injection, temperature control.Inject methane gas to reaction chamber; Stop gas injection after reaching pressure,, generate or the decomposition water compound through regulating coolant temperature control reaction with inlet close; Translation or rotatable stage; Gather X ray information through the X ray detector, generate the tomography or the stereo-picture of the different moment, diverse location, and obtain the data message of thermistor through data acquisition module;
In the 4th step, the collection of question response complete data finishes, and carries out pressure release through air inlet/outlet, methane gas is discharged outdoor, and cooling medium is discharged, and breaks off the wiring of thermistor, pressure transducer, opens the reaction unit end cap, and glass sand is cleaned up.
The 5th step, data analysis; Through different tomographies or the three-dimensional radioscopic image that obtains; Obtain the distribution of gas hydrate saturation degree by signal intensity; And then learn information such as the heat of transformation, reaction heat; In conjunction with the data and the heat transfer model of thermistor, obtain the various parameters that gas hydrate generate, decompose transient.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630560A (en) * | 2013-11-04 | 2014-03-12 | 大连理工大学 | Device and method for CT (Computed Tomography) scanning of low-temperature sample |
| CN105424734A (en) * | 2016-01-12 | 2016-03-23 | 大连理工大学 | Low-temperature high-pressure control device for observing aquo-complex generation and decomposition characteristics through X-ray CT device |
| CN106290421A (en) * | 2016-09-14 | 2017-01-04 | 大连理工大学 | A kind of hydrate growth speed based on Microfocus X-ray X ray CT and effective volume measurement apparatus and method |
| WO2017000462A1 (en) * | 2015-06-30 | 2017-01-05 | 江苏宏博机械制造有限公司 | Experimentation apparatus for hydrate formation heat characterization |
| CN106872497A (en) * | 2017-05-03 | 2017-06-20 | 青岛海洋地质研究所 | The special hydrate resistivity test devices of CT and method |
| CN106950355A (en) * | 2017-05-23 | 2017-07-14 | 中国石油大学(华东) | A kind of ocean gas hydrate with the comprehensive on-line measuring device of ship and method |
| CN109085198A (en) * | 2018-07-27 | 2018-12-25 | 昆明理工大学 | A kind of experimental provision and application method measuring transformer oil convection transfer rate |
| CN113075250A (en) * | 2021-01-11 | 2021-07-06 | 太原碧蓝水利工程设计有限公司 | Normal temperature heat conductivity coefficient prediction model |
| CN117368066A (en) * | 2023-10-10 | 2024-01-09 | 大连理工大学 | Nanometer CT hydrate in-situ generation-based seepage simulation device and application method thereof |
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| CN1440832A (en) * | 2003-04-01 | 2003-09-10 | 中国地质大学（武汉） | Comprehensive test equipment for natural gas hydrate |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630560B (en) * | 2013-11-04 | 2016-01-13 | 大连理工大学 | A kind of device and method for cryogenic sample CT scan |
| CN103630560A (en) * | 2013-11-04 | 2014-03-12 | 大连理工大学 | Device and method for CT (Computed Tomography) scanning of low-temperature sample |
| WO2017000462A1 (en) * | 2015-06-30 | 2017-01-05 | 江苏宏博机械制造有限公司 | Experimentation apparatus for hydrate formation heat characterization |
| CN105424734A (en) * | 2016-01-12 | 2016-03-23 | 大连理工大学 | Low-temperature high-pressure control device for observing aquo-complex generation and decomposition characteristics through X-ray CT device |
| CN105424734B (en) * | 2016-01-12 | 2018-04-10 | 大连理工大学 | A kind of cryogenic high pressure control device generated for X ray CT equipment observation water compound with resolution characteristic |
| CN106290421B (en) * | 2016-09-14 | 2018-12-21 | 大连理工大学 | A kind of hydrate growth rate and effective volume measuring device and method based on Microfocus X-ray X ray CT |
| CN106290421A (en) * | 2016-09-14 | 2017-01-04 | 大连理工大学 | A kind of hydrate growth speed based on Microfocus X-ray X ray CT and effective volume measurement apparatus and method |
| CN106872497A (en) * | 2017-05-03 | 2017-06-20 | 青岛海洋地质研究所 | The special hydrate resistivity test devices of CT and method |
| CN106950355A (en) * | 2017-05-23 | 2017-07-14 | 中国石油大学(华东) | A kind of ocean gas hydrate with the comprehensive on-line measuring device of ship and method |
| CN106950355B (en) * | 2017-05-23 | 2023-08-11 | 中国石油大学(华东) | Marine natural gas hydrate on-line comprehensive detection device and method |
| CN109085198A (en) * | 2018-07-27 | 2018-12-25 | 昆明理工大学 | A kind of experimental provision and application method measuring transformer oil convection transfer rate |
| CN113075250A (en) * | 2021-01-11 | 2021-07-06 | 太原碧蓝水利工程设计有限公司 | Normal temperature heat conductivity coefficient prediction model |
| CN117368066A (en) * | 2023-10-10 | 2024-01-09 | 大连理工大学 | Nanometer CT hydrate in-situ generation-based seepage simulation device and application method thereof |
| CN117368066B (en) * | 2023-10-10 | 2024-05-17 | 大连理工大学 | Nanometer CT hydrate in-situ generation-based seepage simulation device and application method thereof |
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Inventor after: Zhao Jiafei Inventor after: Zhu Yiming Inventor after: Wang Jiaqi Inventor after: Xue Kaihua Inventor after: Luo Yuan Inventor after: Song Yongchen Inventor after: Yang Lei Inventor after: Liu Weiguo Inventor after: Liu Yu Inventor after: Zhang Yi Inventor after: Wang Dayong Inventor after: Yang Mingjun Inventor after: Cheng Chuanxiao Inventor before: Zhao Jiafei Inventor before: Zhu Yiming Inventor before: Wang Jiaqi Inventor before: Xue Kaihua Inventor before: Luo Yuan Inventor before: Song Yongchen Inventor before: Liu Weiguo Inventor before: Liu Yu Inventor before: Zhang Yi Inventor before: Wang Dayong Inventor before: Yang Mingjun Inventor before: Yang Lei Inventor before: Cheng Chuanxiao |
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