CN102042996A - Experimental apparatus for thermal diffusion effect of natural gas hydrate in porous medium - Google Patents
Experimental apparatus for thermal diffusion effect of natural gas hydrate in porous medium Download PDFInfo
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- CN102042996A CN102042996A CN2010102221195A CN201010222119A CN102042996A CN 102042996 A CN102042996 A CN 102042996A CN 2010102221195 A CN2010102221195 A CN 2010102221195A CN 201010222119 A CN201010222119 A CN 201010222119A CN 102042996 A CN102042996 A CN 102042996A
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Abstract
The invention relates to an experimental apparatus, in particular to an experimental apparatus for thermal diffusion effect. The experimental apparatus for the thermal diffusion effect of a natural gas hydrate in a porous medium comprises a sealed container which is placed in a thermotank, wherein, the upper end and the lower end of the sealed container are respectively equipped with insulation boards, and the sealed container is respectively communicated with an air supply device and a back pressure valve via pipes; the insulation board at the upper end is equipped with time-domain reflection probes, and the insulation board at the lower end is equipped with thermal resistors; and the sealed container is internally equipped with a heating device. By utilizing the experimental apparatus for the thermal diffusion effect of the natural gas hydrate in the porous medium, the thermal diffusion effect of the hydrate can be accurately measured. The experimental apparatus has the advantages of simple structure and low cost, and is convenient for operation.
Description
Technical field
The present invention relates to a kind of experimental provision, relate in particular to a kind of experimental provision of thermal diffusion effect.
Background technology
Gas hydrate are solid compounds that low-molecular-weight hydrocarbon compound and water form under low temperature, high pressure in the rock gas, be the most typical gas hydrate that nature exists, gas hydrate have advantages such as reserves are big, distribution is wide, it is shallow to bury, energy density is high, the back of burning is pollution-free.Deep day by day along with gas hydrate research, the particularly development of exploitation of gas hydrates technical research, the gas hydrate technology manifests day by day in the application prospect of aspects such as rock gas accumulating, mixed gas separation.In the gas hydrate simulation experiment study, gas hydrate formation, decomposition condition and dynamic (dynamical) simulation experiment study thereof be realize that gas hydrate resource exploitation utilization and gas hydrate technology use in other field basis and precondition.
Gas hydrate are a kind of novel energies that have a high potential, and also are the important component parts of global carbon simultaneously.Hydrate is composed and can be decomposited free gas after the dis environment temperature surpasses the phase flat spot.The factor that influences the hydrate heating and decomposition is a lot, as thermal diffusion coefficient, hydrate heat absorption capacity and the heating exploitation Energy Efficiency Ratio etc. of hydrate deposit layer.By the thermal diffusion effect of hydrate in the research porous medium, seek out optimum temperature and the hot radius of imitating that heat is transmitted, can provide technical support for the carrying out of exploitation work of ocean gas hydrate.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defective, and the thermal diffusion effect experimental provision of a kind of gas hydrate in porous medium is provided, and it is simple in structure, and experiment effect is good.
For achieving the above object, the present invention adopts following technical scheme: it comprises airtight container, and airtight container places in the constant temperature oven, and the sealed container interior upper and lower side is respectively equipped with heat-insulating shield, and airtight container is communicated with feeder, counterbalance valve respectively by pipeline; The heat-insulating shield of upper end is provided with the Time Domain Reflectometry probe, and the heat-insulating shield of lower end is provided with thermal resistance; Be provided with heating arrangement in the airtight container.
The experimental facilities of this invention can carry out that hydrate is synthetic, single-point heating and decomposition, temperature two dimension gradiometry and TDR (Time Domain Reflectometry) monitoring etc.The maximum working pressure (MOP) of airtight container is 10MPa, container wall thickness 10mm, deposition object height 150mm in the internal diameter 300mm, container.Constant temperature oven adopt " carbon in the snow " low-temperature cooling system, temperature range be-30 ℃ to room temperature.Each is separated by teflon heat-insulating shield of a thick about 30mm up and down in the container, to realize sediment and the thermal insulation of end cap up and down, guarantees that the thermograde of system only is present on the surface level, the temperature field of a two dimension of formation.The constant voltage environment is controlled by the ecp counterbalance valve of Tescom company, the built-in pressure control pid algorithm of counterbalance valve, and the control accuracy height reaches 0.1% of the controlled pressure width of cloth.
The Time Domain Reflectometry probe is provided with 6-8, and thermal resistance is provided with 6-8.Heating arrangement adopts electrical bar, and heating rod places container central authorities, length 150mm, and the maximum 200W of heating power, real work can be controlled output power by PID and reach the heated at constant temperature effect.
Thermal resistance is the center with reactor center (heating rod), according to positional alignment gradually far away successively, is used for monitoring the variation of thermograde in the airtight container in the hydrate simulated experiment process.In addition, also settle the Time Domain Reflectometry probe in the airtight container, be used for calculating hydrate saturation degree in the porous medium.
This device is a purpose with the research of decomposition of hydrate thermal diffusion effect, by the decomposition of hydrate thermal effect analogue experiment installation of special development, comprehensively adopt Time Domain Reflectometry (TDR) measuring technology of sediment thermograde monitoring technology and hydrate saturation degree to carry out a series of simulated experiments.The hydrate generative process has been discussed, sediment cooling graded and corresponding hydrate saturation degree relation; The sediment thermograde is heated spacing from the influence of, heat time heating time and hydrate heat diffusion capabilities etc. in the decomposition of hydrate process.
Be provided with the porous medium fill area between the upper and lower heat-insulating shield in the airtight container, utilize feeder that gas is introduced in the airtight container, gas spreads along porous medium, and the water reaction with in the porous medium generates hydrate.When utilizing experimental provision of the present invention to carry out the exploitation of gas hydrates simulation, need in porous medium, to generate in advance the hydrate sample.Can under different condition, generate the hydrate sample according to the physical condition of being simulated.
On exhaust system, be provided with counterbalance valve, under the constant voltage of appointment, carry out with the resolution of guaranteeing hydrate in the experimentation.
The thermal diffusion effect experimental provision of gas hydrate of the present invention in porous medium can accurately be measured the hydrate thermal diffusion effect, and described device is simple, cheap, easy to operate.
Description of drawings
Below in conjunction with the drawings and specific embodiments this device is done detailed description:
Fig. 1 is a structural representation of the present invention.
Embodiment
This device comprises airtight container 1, and airtight container 1 places in the constant temperature oven 2, and airtight container 1 inner upper and lower side all is provided with heat-insulating shield 3, and airtight container 1 is communicated with feeder 4, counterbalance valve 5 respectively by pipeline; The heat-insulating shield 3 of upper end is provided with Time Domain Reflectometry probe 6, and the heat-insulating shield 3 of lower end is provided with thermal resistance 7; Be provided with heating arrangement 8 in the airtight container 1, heating arrangement 8 adopts electrical bar.
Time Domain Reflectometry probe 6 is provided with eight, and thermal resistance 7 is provided with eight.Be provided with porous medium fill area 9 between the upper and lower heat-insulating shield in the airtight container.
Experiment flow is as follows:
1. in airtight container 1, generate hydrate;
2. according to test arrangement, adopt the heating of heating arrangement 8 line type of heating at circle tube sealing container 1 center, investigate temperature gradient field variation along radial direction.
3. at the upper and lower end cap place of airtight container 1, adopt the insulated design of heat-insulating shield 3,, longitudinal temperature approximate to form in container changes little two-dimensional temperature field.
4. utilize along the variation of rerum natura in the arbitrary group of measuring vessel in many groups two pointer type Time Domain Reflectometry probe 6 of radial direction layout, used Time Domain Reflectometry probe 6 is TDR100.
5. the gas when adopting counterbalance valve 5 to release decomposition of hydrate, the constant pressure of airtight container 1 when observing to keep;
6. computer measurement and control system detects, writes down pressure, temperature variation and the reception of airtight container 1, the data on flows of processing flowmeter.
The characteristics of this system are can test in the two-dimentional reaction field, on one point under the thermal source condition, and the variation of temperature field and hydrate rerum natura.
Claims (5)
1. the thermal diffusion effect experimental provision of gas hydrate in porous medium, it is characterized in that, comprise airtight container, airtight container places in the constant temperature oven, the sealed container interior upper and lower side is respectively equipped with heat-insulating shield, and airtight container is communicated with feeder, counterbalance valve respectively by pipeline; The heat-insulating shield of upper end is provided with the Time Domain Reflectometry probe, and the heat-insulating shield of lower end is provided with thermal resistance; Be provided with heating arrangement in the airtight container.
2. the thermal diffusion effect experimental provision of gas hydrate according to claim 1 in porous medium is characterized in that, is provided with the porous medium fill area between the upper and lower heat-insulating shield in the airtight container.
3. the thermal diffusion effect experimental provision of gas hydrate according to claim 2 in porous medium is characterized in that, the Time Domain Reflectometry probe is provided with 6-8.
4. the thermal diffusion effect experimental provision of gas hydrate according to claim 2 in porous medium is characterized in that, thermal resistance is provided with 6-8.
5. the thermal diffusion effect experimental provision of gas hydrate according to claim 2 in porous medium is characterized in that, heating arrangement adopts electrical bar.
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| CN2010102221195A CN102042996A (en) | 2010-07-01 | 2010-07-01 | Experimental apparatus for thermal diffusion effect of natural gas hydrate in porous medium |
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| CN2010102221195A CN102042996A (en) | 2010-07-01 | 2010-07-01 | Experimental apparatus for thermal diffusion effect of natural gas hydrate in porous medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809581A (en) * | 2012-08-14 | 2012-12-05 | 上海交通大学 | Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection |
| CN103063701A (en) * | 2012-12-26 | 2013-04-24 | 中国科学院广州能源研究所 | Measurement apparatus for thermal conductivity of natural gas hydrate deposit |
| CN103760190A (en) * | 2014-01-13 | 2014-04-30 | 中国科学院广州能源研究所 | Method and device for measuring heat conduction coefficient of natural gas hydrate in porous medium |
| CN104316558A (en) * | 2014-10-15 | 2015-01-28 | 中国海洋石油总公司 | Device and method for measuring heat conductivity of sediments of gas hydrates |
| 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 |
| 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 |
| US20170292904A1 (en) * | 2015-09-23 | 2017-10-12 | China University Of Petroleum (East China) | Test system and test method for a simulation experiment of gas hydrate in a porous medium |
| CN113533677A (en) * | 2021-08-02 | 2021-10-22 | 山东科技大学 | One-dimensional test device for testing physical properties of hydrate |
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| CN2384217Y (en) * | 1999-07-29 | 2000-06-21 | 东南大学 | Measurer for heat wet mobile character of porous medium containing wet |
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| CN2384217Y (en) * | 1999-07-29 | 2000-06-21 | 东南大学 | Measurer for heat wet mobile character of porous medium containing wet |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809581A (en) * | 2012-08-14 | 2012-12-05 | 上海交通大学 | Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection |
| CN102809581B (en) * | 2012-08-14 | 2014-09-10 | 上海交通大学 | Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection |
| CN103063701A (en) * | 2012-12-26 | 2013-04-24 | 中国科学院广州能源研究所 | Measurement apparatus for thermal conductivity of natural gas hydrate deposit |
| CN103760190A (en) * | 2014-01-13 | 2014-04-30 | 中国科学院广州能源研究所 | Method and device for measuring heat conduction coefficient of natural gas hydrate in porous medium |
| CN103760190B (en) * | 2014-01-13 | 2016-01-27 | 中国科学院广州能源研究所 | A kind of method and apparatus measuring gas hydrate coefficient of heat conductivity in porous medium |
| CN104316558A (en) * | 2014-10-15 | 2015-01-28 | 中国海洋石油总公司 | Device and method for measuring heat conductivity of sediments of gas hydrates |
| 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 |
| US20170292904A1 (en) * | 2015-09-23 | 2017-10-12 | China University Of Petroleum (East China) | Test system and test method for a simulation experiment of gas hydrate in a porous medium |
| US9897529B2 (en) * | 2015-09-23 | 2018-02-20 | China University Of Petroleum (East China) | Test system and test method for a simulation experiment of gas hydrate in a porous medium |
| 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 |
| CN113533677A (en) * | 2021-08-02 | 2021-10-22 | 山东科技大学 | One-dimensional test device for testing physical properties of hydrate |
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Application publication date: 20110504 |