CN110657900A - Detection device - Google Patents
Detection device Download PDFInfo
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- CN110657900A CN110657900A CN201910947893.3A CN201910947893A CN110657900A CN 110657900 A CN110657900 A CN 110657900A CN 201910947893 A CN201910947893 A CN 201910947893A CN 110657900 A CN110657900 A CN 110657900A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 151
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 239000004576 sand Substances 0.000 claims abstract description 46
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims description 34
- 239000013307 optical fiber Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 28
- 238000003860 storage Methods 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 8
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 abstract description 45
- 239000007789 gas Substances 0.000 abstract description 41
- 238000000034 method Methods 0.000 abstract description 31
- 230000008569 process Effects 0.000 abstract description 24
- 230000008859 change Effects 0.000 abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 30
- 238000000354 decomposition reaction Methods 0.000 description 17
- 239000003345 natural gas Substances 0.000 description 16
- 238000009826 distribution Methods 0.000 description 11
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 natural gas hydrates Chemical class 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a detection device, comprising: the high-pressure reaction kettle is internally provided with a reaction cavity and is provided with a sand inlet communicated with the reaction cavity; the temperature control system is communicated with the reaction cavity so as to control the temperature of the reaction cavity; the pressure regulating system is communicated with the reaction cavity so as to regulate the pressure of the reaction cavity; the gas injection system is communicated with the reaction cavity and is used for injecting gas into the reaction cavity; the water injection system is communicated with the reaction cavity so as to inject water into the reaction cavity; and the data acquisition system is connected with the reaction cavity to acquire the temperature and the strain of the medium system in the reaction cavity. The technical scheme of the invention can detect the temperature and the strain of the medium system in the process of generating and decomposing the natural gas hydrate, and reflect the temperature change and the structural deformation of the medium system so as to guide the exploitation of the natural gas hydrate.
Description
Technical Field
The invention relates to the technical field of natural gas hydrate exploitation, in particular to a detection device.
Background
As a novel clean energy source, the natural gas hydrate widely exists in continental permafrost zones and deep sea bottoms, has huge natural gas resource reserves, and has attracted high attention of all countries in the world in recent years. Currently, efficient and safe exploitation of natural gas hydrates is two major key problems in the utilization of natural gas hydrate resources.
Natural gas hydrate is taken as a metastable mineral and is existed in a medium system of a deposited layer in a solid state under specific low-temperature and high-pressure conditions. Currently, the main methods for exploiting natural gas hydrate resources include a depressurization exploitation method, a heat shock method and an inhibitor injection method. The decomposition process of the natural gas hydrate in the deposit layer is a complex process which relates to heat transfer, multiphase flow and physicochemical reaction, the decomposition and generation of the natural gas hydrate are heat absorption and release reactions, the decomposition and generation of the natural gas hydrate change the pore structure of the deposit layer, and the inside of the deposit layer generates deformation under the action of pressure or gravity. Thus, during the decomposition of natural gas hydrates, the media system contains both temperature changes and structural changes.
In the process of exploiting the natural gas hydrate, the natural gas hydrate is changed into a gas state and a liquid state from a solid state, so that the deposited layer loses support and deforms, and safety problems such as deposited layer collapse, gas leakage and the like are easily caused. However, the existing device cannot detect the temperature change and structural deformation of the medium system caused by the generation and decomposition process of the natural gas hydrate.
Disclosure of Invention
The invention mainly aims to provide a detection device, which aims to detect the temperature and the strain of a medium system in the process of generating and decomposing a natural gas hydrate and reflect the temperature change and the structural deformation of the medium system.
In order to achieve the above object, the present invention provides a detection device, including:
the high-pressure reaction kettle is internally provided with a reaction cavity and is provided with a sand inlet communicated with the reaction cavity;
the temperature control system is communicated with the reaction cavity so as to control the temperature of the reaction cavity;
the pressure regulating system is communicated with the reaction cavity so as to regulate the pressure of the reaction cavity;
the gas injection system is communicated with the reaction cavity and is used for injecting gas into the reaction cavity;
the water injection system is communicated with the reaction cavity so as to inject water into the reaction cavity;
and the data acquisition system is connected with the reaction cavity to acquire the temperature and the strain of the medium system in the reaction cavity.
Optionally, the data acquisition system includes a sensing fiber group and a data acquisition station, the sensing fiber group is composed of distributed sensing fibers, the sensing fiber group is installed in the reaction cavity, and the sensing fiber group is electrically connected to the data acquisition station.
Optionally, the sensing optical fiber group includes a temperature sensing optical fiber and a strain sensing optical fiber, the strain sensing optical fiber and the temperature sensing optical fiber are arranged side by side, and the temperature sensing optical fiber provides temperature compensation for the strain sensing optical fiber.
Optionally, the data acquisition system includes a plurality of sensing optical fiber groups, and the sensing optical fiber groups are staggered with each other.
Optionally, the high-pressure reaction kettle comprises a top cover and a kettle body, the reaction cavity is formed in the kettle body, the top cover covers the kettle body, and the top cover is provided with the sand inlet.
Optionally, the kettle body comprises a shell and a lining, the lining is mounted in the shell, the shell and the lining are arranged at intervals and form a cavity, the reaction cavity is formed in the lining, and the shell is provided with a fluid outlet and a fluid inlet which are respectively communicated with the cavity;
the temperature control system comprises a temperature control water bath, a liquid outlet of the temperature control water bath is communicated with the fluid inlet, and a fluid outlet is communicated with a liquid inlet of the temperature control water bath.
Optionally, the pressure regulating system includes gas holder and gas-liquid separation jar, the gas holder through first pipeline with the reaction chamber intercommunication, be equipped with the back pressure valve on the first pipeline, the back pressure valve with between the gas holder be equipped with on the first pipeline the gas-liquid separation jar.
Optionally, the water injection system comprises a water tank and a water injection pump, the water tank is communicated with the reaction cavity through a second pipeline, and the water injection pump is arranged on the second pipeline;
and/or, the gas injection system includes gas pitcher and gas injection pump, the gas pitcher pass through the third pipeline communicate in the reaction chamber, be equipped with the gas injection pump on the third pipeline.
Optionally, the detection device further comprises a sand discharge system, the sand discharge system comprises a gas-liquid-solid separator and a second vacuum pump, the gas-liquid-solid separator is communicated with the reaction cavity through a sand discharge pipe, and the second vacuum pump is communicated with the gas-liquid-solid separator.
Optionally, the detection device further comprises a flushing system, the flushing system comprises a liquid storage tank and an injection pump, the liquid storage tank is communicated with the reaction cavity through a fourth pipeline, and the injection pump is arranged on the fourth pipeline.
In the technical scheme of the invention, a detection device is characterized in that a reaction cavity is formed in a high-pressure reaction kettle, the high-pressure reaction kettle is provided with a sand inlet communicated with the reaction cavity, fine sand is added into the reaction cavity through the sand inlet, a gas injection system is communicated with the reaction cavity, a natural gas is injected into the reaction cavity through the gas injection system, a water injection system is communicated with the reaction cavity, and water is injected into the reaction cavity through the water injection system, so that a medium system of the fine sand, the natural gas and the water is formed in the reaction cavity to simulate the structural composition of a deposition layer, a temperature control system is communicated with the reaction cavity, a pressure regulating system is communicated with the reaction cavity, the temperature control system and the pressure regulating system respectively regulate the temperature and the pressure in the reaction cavity, so that the conversion of the generation and decomposition process of natural hydrate can be realized by regulating the temperature and the pressure, a data acquisition system is connected with the reaction cavity, and the data acquisition system acquires the temperature, to reflect the temperature change and structural deformation of the medium system. The technical scheme of the invention can detect the temperature and the strain of the medium system in the process of generating and decomposing the natural gas hydrate, and reflect the temperature change and the structural deformation of the medium system so as to guide the exploitation of the natural gas hydrate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a block diagram showing the structure of a detecting device according to the present invention;
FIG. 2 is a schematic structural diagram of the detecting device of the present invention;
FIG. 3 is a top view of the high pressure reactor of FIG. 2;
FIG. 4 is a cross-sectional view of the autoclave of FIG. 2;
FIG. 5 is a schematic view of the installation of the sensing fiber set of FIG. 2;
FIG. 6 is a plan view illustrating the effect of installation of the sensing fiber set of FIG. 5;
the reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The invention provides a detection device 1.
Referring to fig. 1 to 6, in an embodiment of the present invention, a detection apparatus 1 includes:
the high-pressure reaction kettle 100 is provided with a reaction cavity 105 formed in the high-pressure reaction kettle 100, and the high-pressure reaction kettle 100 is provided with a sand inlet 101 communicated with the reaction cavity 105;
a temperature control system 200, which is communicated with the reaction chamber 105 to control the temperature of the reaction chamber 105;
a pressure regulating system 300, which is communicated with the reaction chamber 105 to regulate the pressure of the reaction chamber 105;
a gas injection system 500, connected to the reaction chamber 105, for injecting gas into the reaction chamber 105;
a water injection system 400, which is communicated with the reaction chamber 105 and is used for injecting water into the reaction chamber 105;
and a data acquisition system 600 connected to the reaction chamber 105 for acquiring the temperature and strain of the medium system in the reaction chamber 105.
In the technical scheme of the invention, in the detection device 1, a reaction cavity 105 is formed in a high-pressure reaction kettle 100, the high-pressure reaction kettle is provided with a sand inlet 101 communicated with the reaction cavity 105, fine sand is added into the reaction cavity 105 through the sand inlet 101, an air injection system 500 is communicated with the reaction cavity 105, the air injection system 500 injects natural gas into the reaction cavity 105, an water injection system 400 is communicated with the reaction cavity 105, the water injection system 400 injects water into the reaction cavity 105, thus, a medium system of the fine sand, the natural gas and the water is formed in the reaction cavity 105, so as to simulate the structural composition of a deposition layer, a temperature control system 200 is communicated with the reaction cavity 105, a pressure regulating system 300 is communicated with the reaction cavity 105, the temperature control system 200 and the pressure regulating system 300 respectively regulate the temperature and the pressure of the reaction cavity 105, thus, the conversion of the generation and decomposition process of natural hydrate can be realized by regulating the temperature and the pressure, a data acquisition system 600 is, the data acquisition system 600 acquires the temperature and strain of the media system during the generation and decomposition of the natural hydrates to reflect the temperature change and structural deformation of the media system. The technical scheme of the invention can detect the temperature and the strain of the medium system in the process of generating and decomposing the natural gas hydrate, reflect the temperature change and the structural deformation of the medium system and guide the exploitation of the natural gas hydrate.
It should be noted that, in order to ensure that the reaction cavity 105 is uniformly filled with the fine sand, in the embodiment of the present invention, the bottom of the high pressure reactor 100 may be connected to the vibrator 900 through the support rod 910, and the vibrator 900 drives the high pressure reactor 100 to vibrate through the support rod 910, so that the fine sand added from the sand inlet 101 may be uniformly distributed in the reaction cavity 105. After fine sand, natural gas and water are injected into the reaction cavity 105, the temperature of the reaction cavity 105 is adjusted through the temperature control system 200, so that the natural gas and the water in the reaction cavity 105 react at low temperature and high pressure to generate natural gas hydrate, and in the process, the data acquisition system 600 acquires the temperature and strain of a medium system in the natural gas hydrate generation process; after the natural gas hydrate is generated, the temperature and the pressure of the reaction cavity 105 are adjusted through the temperature control system 200 and the pressure adjustment system 300, so that the natural gas hydrate in the reaction cavity 105 is decomposed at high temperature and low pressure, and meanwhile, the data acquisition system 600 can acquire the temperature and the strain of a medium system in the decomposition process of the natural gas hydrate. Therefore, the method can obtain the temperature change and the strain change of the medium system in the process of generating and decomposing the natural hydrate, thereby establishing the temperature distribution cloud chart and the strain distribution cloud chart of the medium system and guiding the exploitation of the actual natural gas hydrate according to the distribution cloud chart.
Referring to fig. 1 to 6, in an embodiment of the present invention, the data acquisition system 600 includes a sensing fiber group 610 and a data acquisition station 620, where the sensing fiber group 610 is composed of distributed sensing fibers, the sensing fiber group 610 is installed in the reaction chamber 105, and the sensing fiber group 610 is electrically connected to the data acquisition station 620. In the embodiment of the invention, the sensing optical fiber group 610 installed in the reaction cavity 105 can detect the temperature and the strain of a medium system in the high-pressure reaction kettle 100, the data acquisition station 620 acquires the detected temperature data and strain data, and a temperature distribution cloud chart and a strain distribution cloud chart are established according to the temperature data and the strain data, so that the exploitation of the actual natural gas hydrate is guided. It should be noted that the data acquisition system 600 further includes a pressure sensor 630, the pressure sensor 630 is mounted on the top cover 110 of the autoclave 100, and the pressure sensor 630 is electrically connected to the data acquisition station 620. In this way, the data collection station 620 can collect the pressure data of the autoclave 100 detected by the pressure sensor 630.
Referring to fig. 1 to 6, in an embodiment of the present invention, the sensing fiber group 610 includes a temperature sensing fiber 611 and a strain sensing fiber 612, the strain sensing fiber 612 is disposed side by side with the temperature sensing fiber 611, and the temperature sensing fiber 611 provides temperature compensation for the strain sensing fiber 612. It should be noted that the temperature sensing optical fiber 611 is a distributed temperature sensing optical fiber, and the temperature sensing optical fiber 611 collects the temperature distribution of the medium system in the process of generating and decomposing the natural gas hydrate in a linear manner. The strain sensing optical fiber 612 is a distributed strain sensing optical fiber, and the strain sensing optical fiber 612 collects strain distribution conditions of a medium system in the process of generating and decomposing the natural gas hydrate in a line mode. The data collected by the strain sensing fiber 612 is influenced by two factors, namely, the strain generated by the external stress on the strain sensing fiber 612 on one hand, and the strain generated by expansion with heat and contraction with cold caused by the change of the environmental temperature on the other hand. In order to eliminate the strain caused by the temperature change, the strain sensing optical fiber 612 is arranged side by side close to the temperature sensing optical fiber 611, so that the influence of the ambient temperature on the data acquired by the strain sensing optical fiber 612 can be calculated according to the ambient temperature detected by the temperature sensing optical fiber 611, and more accurate strain data of the medium system can be obtained, so as to provide more accurate information for the exploitation of the natural gas hydrate.
Referring to fig. 1 to 6, in an embodiment of the present invention, the data acquisition system 600 includes a plurality of sensing fiber groups 610, and the sensing fiber groups 610 are arranged in a staggered manner. The sensing fiber groups 610 in the reaction chamber 105 are arranged in a grid structure in three directions of the x-axis, the y-axis and the z-axis. Thus, the temperature sensing optical fiber 611 arranged in the grid structure can obtain a three-dimensional multi-layer temperature distribution cloud chart in the medium system from the x-axis direction, the y-axis direction and the z-axis direction, so that the position parameters of natural gas hydrate generation, icing, secondary generation and decomposition are obtained, and the influence of the mining mode on the medium system containing the natural gas hydrate at different positions is determined. The strain sensing optical fiber 612 arranged through the grid structure can obtain a three-dimensional multi-layer strain distribution cloud picture in the medium system from the directions of an x axis, a y axis and a z axis, so that the influence mechanism of the content and the occurrence state of the natural gas hydrate on the structure state of the medium system in the generation and decomposition processes of the natural gas hydrate is reflected. In addition, the detection positions of the sensing optical fiber group 610 are distributed in the medium system of the whole three-dimensional structure, so that the problem that the medium system of the natural gas hydrate cannot be comprehensively reflected due to too few measuring points is avoided.
Referring to fig. 1 to 6, in an embodiment of the present invention, the high-pressure reaction kettle 100 includes a top cover 110 and a kettle body 120, the reaction cavity 105 is formed in the kettle body 120, the top cover 110 covers the kettle body 120, and the top cover 110 is provided with the sand inlet 101. It should be noted that the high-pressure reaction kettle 100 is made of 316 steel, and the high-pressure reaction kettle 100 can bear the pressure of 0-40 MPa and the temperature of 268-288K, so as to simulate the actual storage condition of the seabed natural gas hydrate. When conducting the experiment, fine sand was added through the sand inlet 101 of the top cap 110. In addition, the top cover 110 and the kettle body 120 are connected by the nut 104 through a screw thread, of course, other connection methods may also be adopted, and the present invention is not limited thereto, and the above methods are within the protection scope of the present invention.
Referring to fig. 1 to 6, in an embodiment of the present invention, the autoclave body 120 includes a shell 121 and an inner liner 122, the inner liner 122 is installed in the shell 121, the shell 121 and the inner liner 122 are disposed at an interval and form a cavity 123, the reaction chamber 105 is formed in the inner liner 122, and the shell 121 is provided with a fluid outlet 103 and a fluid inlet 102 respectively communicating with the cavity 123; the temperature control system 200 comprises a temperature-controlled water bath 210, wherein a liquid outlet of the temperature-controlled water bath 210 is communicated with the fluid inlet 102, and a liquid inlet of the temperature-controlled water bath 210 is communicated with the fluid outlet 103. The fluid inlet 102 is provided at a lower portion of one side of the housing 121, and the fluid outlet 103 is provided at an upper portion of the other side of the housing 121. Thus, the temperature of the temperature control medium is adjusted by the temperature control system 200, and the temperature of the reaction cavity 105 can be adjusted, so that the conversion of the natural gas hydrate generation and decomposition process is realized, and the temperature distribution cloud chart and the strain distribution cloud chart of the natural gas hydrate generation and decomposition process can be obtained. According to the invention, the kettle body 120 with the jacket structure is adopted, so that the internal temperature of the reaction cavity 105 can be rapidly and accurately controlled, and the high-precision experimental requirement is met.
Referring to fig. 1 to 6, in an embodiment of the present invention, the pressure regulating system 300 includes a gas storage tank 310 and a gas-liquid separation tank 320, the gas storage tank 310 is communicated with the reaction chamber 105 through a first pipeline, a backpressure valve 330 is disposed on the first pipeline, and the gas-liquid separation tank 320 is disposed on the first pipeline between the backpressure valve 330 and the gas storage tank 310. After the gas hydrate is generated, the pressure is set by the back pressure valve 330 to decompose the gas hydrate, and after the gas and water generated by decomposition are separated by the gas-liquid separation tank 320, the water is left in the gas-liquid separation tank 320, and the gas flows from the gas-liquid separation tank 320 to the gas storage tank 310. It should be noted that a depressurization hole 113 is formed in the top cover 110 of the high-pressure reactor 100, the gas storage tank 310 is communicated with the depressurization hole 113 through a first pipeline, and the depressurization hole 113 is communicated with the vertical depressurization well 130 in the high-pressure reactor 100, so as to simulate an influence mechanism of different depressurization modes in the natural gas hydrate exploitation process on the decomposition of the natural gas hydrate in the medium system, and obtain the temperature characteristics and strain characteristics of the medium system around the depressurization well 130, so as to guide the exploitation of the natural gas hydrate.
Referring to fig. 1 to 6, in an embodiment of the present invention, the water injection system 400 includes a water tank 410 and a water injection pump 420, the water tank 410 is communicated with the reaction chamber 105 through a second pipeline, and the water injection pump 420 is disposed on the second pipeline. It should be noted that an injection port 111 is formed on the top cover 110 of the high pressure reactor 100, the water tank 410 is communicated with the injection port 111 through a second pipeline, deionized water is filled in the water tank 410, the water injection pump 420 sucks the deionized water from the water tank 410, and the sucked deionized water is injected into the reaction chamber 105 through the injection port 111, so as to complete the injection of deionized water.
Referring to fig. 1 to 6, in an embodiment of the present invention, the gas injection system 500 includes a gas tank 510, a gas injection pump 520, and a first vacuum pump 530, the gas tank 510 is communicated with the reaction chamber 105 through a third pipeline, the third pipeline is provided with the gas injection pump 520, and the first vacuum pump 530 is disposed on the third pipeline between the gas injection pump 520 and the reaction chamber 105. The gas tank 510 contains natural gas, and the gas tank 510 is connected to the injection port 111 through a third pipe. After the first vacuum pump 530 is vacuumized, the natural gas is pressurized by the gas injection pump 520 and then flows into the autoclave 100 through the injection port 111, thereby completing the injection of the natural gas.
Referring to fig. 1 to 6, in an embodiment of the present invention, the detecting apparatus 1 further includes a sand discharging system 700, the sand discharging system 700 includes a gas-liquid-solid separator 710 and a second vacuum pump 720, the gas-liquid-solid separator 710 is communicated with the reaction chamber 105 through a sand discharging pipe 730, and the second vacuum pump 720 is communicated with the gas-liquid-solid separator 710. It should be noted that a sealing cover 124 is arranged at the bottom of the kettle body 120, one end of the sand discharge pipe 730 is connected to the sealing cover 124, and the other end of the sand discharge pipe 730 is communicated with the gas-liquid-solid separator 710. Thus, after the experiment is finished, the second vacuum pump 720 is started, and under the vacuum pumping action of the second vacuum pump 720, the natural gas, the water and the fine sand in the reaction chamber 105 flow into the gas-liquid-solid separator 710 through the sand discharge pipe 730, so as to clean the reaction chamber 105.
Referring to fig. 1 to 6, in an embodiment of the present invention, the detecting device 1 further includes a flushing system 800, the flushing system 800 includes a liquid storage tank 810 and a syringe pump 820, the liquid storage tank 810 is communicated with the reaction chamber 105 through a fourth pipeline, and the syringe pump 820 is disposed on the fourth pipeline. It should be noted that a flushing port 112 is arranged on the top cover 110 of the high-pressure reaction kettle 100, the liquid storage tank 810 is communicated with the flushing port 112 through a fourth pipeline, and water is filled in the liquid storage tank 810. Thus, the injection pump 820 sucks water from the water storage tank 410, and the water is sprayed into the autoclave 100 after being pressurized by the injection pump 820, so as to clean the sensing optical fiber set 610 and the reaction chamber 105, so that the fine sand in the reaction chamber 105 is flushed at the bottom of the reaction chamber 105, and is discharged from the sand discharge pipe 730, thereby completing the cleaning of the reaction chamber 105.
Specifically, the temperature and strain process of the medium system in the process of generating and decomposing the natural gas hydrate by using the detection device 1 is as follows:
injecting fine sand into the reaction cavity 105 through the sand inlet 101, starting the vibrator 900 in the sand filling process to uniformly fill the fine sand in the reaction cavity 105, and closing the vibrator 900 after the sand filling is finished;
the water injection system 400 works: the water injection pump 420 sucks the deionized water from the water tank 410 and injects the deionized water into the reaction chamber 105 through the injection port 111 at the top of the reaction chamber 105;
the gas injection system 500 works as follows: the gas tank 510 supplies gas to the gas injection pump 520, and the gas injection pump 520 injects the gas into the reaction chamber 105 under pressure;
the working process of the temperature control system 200 is as follows: the temperature-controlled water bath 210 injects a temperature-controlled medium from the fluid inlet 102, the temperature-controlled medium flows back to the temperature-controlled water bath 210 after being discharged from the fluid outlet 103, and the temperature-controlled medium circulates between the temperature-controlled water bath 210 and the cavity 123 of the high-pressure reaction kettle 100, so that the effect of adjusting the temperature of the reaction cavity 105 is achieved;
the working principle of the pressure regulating system 300 is as follows: after the natural gas hydrate is generated, the decomposition pressure of the natural gas hydrate is set through the backpressure valve 330 so that the natural gas hydrate is decomposed, the water is left in the gas-liquid separation tank 320 after the natural gas and the water generated by decomposition are separated by the gas-liquid separation tank 320, and the natural gas flows to the gas storage tank 310 from the gas-liquid separation tank 320;
the working principle of the data acquisition system 600 is as follows: the pressure sensor 630 measures the overall pressure of the reaction chamber 105, the sensing fiber group 610 measures the temperature data and the strain data of the medium system in the reaction chamber 105, and the data acquisition station 620 acquires the detection data;
the working process of the sand discharging system 700 is as follows: after the experiment is finished, starting a second vacuum pump 720 to vacuumize the reaction cavity 105, so that natural gas, water and fine sand in the reaction cavity 105 enter the gas-liquid-solid separator 710 through a sand discharge pipe 730;
the operation of the flush system 800 is: the injection pump 820 absorbs water from the liquid storage tank 810, water is injected into the reaction cavity 105 for spraying after pressurization, and the inner walls of the sensing optical fiber group 610 and the reaction cavity 105 are cleaned, so that fine sand in the reaction cavity 105 is washed at the bottom and is discharged from the sand discharge pipe 730, and the cleaning of the high-pressure reaction kettle 100 is completed.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A detection device, comprising:
the high-pressure reaction kettle is internally provided with a reaction cavity and is provided with a sand inlet communicated with the reaction cavity;
the temperature control system is communicated with the reaction cavity so as to control the temperature of the reaction cavity;
the pressure regulating system is communicated with the reaction cavity so as to regulate the pressure of the reaction cavity;
the gas injection system is communicated with the reaction cavity and is used for injecting gas into the reaction cavity;
the water injection system is communicated with the reaction cavity so as to inject water into the reaction cavity;
and the data acquisition system is connected with the reaction cavity to acquire the temperature and the strain of the medium system in the reaction cavity.
2. The detection device according to claim 1, wherein the data acquisition system comprises a sensing optical fiber group and a data acquisition station, the sensing optical fiber group is composed of distributed sensing optical fibers, the sensing optical fiber group is installed in the reaction cavity, and the sensing optical fiber group is electrically connected with the data acquisition station.
3. The sensing device of claim 2, wherein the set of sensing fibers includes a temperature sensing fiber and a strain sensing fiber, the strain sensing fiber being positioned alongside the temperature sensing fiber, the temperature sensing fiber providing temperature compensation for the strain sensing fiber.
4. The sensing device of claim 3, wherein the data acquisition system includes a plurality of the sensing fiber sets, the plurality of sensing fiber sets being staggered with respect to one another.
5. The detection device according to claim 2, wherein the high-pressure reaction kettle comprises a top cover and a kettle body, the reaction cavity is formed in the kettle body, the top cover covers the kettle body, and the top cover is provided with the sand inlet.
6. The detection device according to claim 5, wherein the kettle body comprises a shell and a lining, the lining is arranged in the shell, the shell and the lining are arranged at intervals and form a cavity, the reaction cavity is formed in the lining, and the shell is provided with a fluid outlet and a fluid inlet which are respectively communicated with the cavity;
the temperature control system comprises a temperature control water bath, a liquid outlet of the temperature control water bath is communicated with the fluid inlet, and a fluid outlet is communicated with a liquid inlet of the temperature control water bath.
7. The detection device according to any one of claims 1 to 6, wherein the pressure regulating system comprises a gas storage tank and a gas-liquid separation tank, the gas storage tank is communicated with the reaction chamber through a first pipeline, a back pressure valve is arranged on the first pipeline, and the gas-liquid separation tank is arranged on the first pipeline between the back pressure valve and the gas storage tank.
8. The detection device according to any one of claims 1 to 6, wherein the water injection system comprises a water tank and a water injection pump, the water tank is communicated with the reaction chamber through a second pipeline, and the water injection pump is arranged on the second pipeline;
and/or, the gas injection system includes gas pitcher and gas injection pump, the gas pitcher pass through the third pipeline communicate in the reaction chamber, be equipped with the gas injection pump on the third pipeline.
9. The detection device according to any one of claims 1 to 6, further comprising a sand discharge system, wherein the sand discharge system comprises a gas-liquid-solid separator and a second vacuum pump, the gas-liquid-solid separator is communicated with the reaction chamber through a sand discharge pipe, and the second vacuum pump is communicated with the gas-liquid-solid separator.
10. The detecting device for detecting the rotation of a motor rotor as claimed in claim 9, wherein the detecting device further comprises a flushing system, the flushing system comprises a liquid storage tank and a syringe pump, the liquid storage tank is communicated with the reaction cavity through a fourth pipeline, and the syringe pump is arranged on the fourth pipeline.
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