CN112162578A - Temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid - Google Patents
Temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid Download PDFInfo
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- CN112162578A CN112162578A CN202011033584.4A CN202011033584A CN112162578A CN 112162578 A CN112162578 A CN 112162578A CN 202011033584 A CN202011033584 A CN 202011033584A CN 112162578 A CN112162578 A CN 112162578A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention relates to a temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid, which consists of a computer 1, a preparation kettle 5, a circulating pump 7, a double-layer refrigerating pipe 26, a refrigerating control unit 18, a visible pipe 27, a vacuum pump 9, a pressure regulator 10, an auxiliary pipeline 28 and a pipeline heater 13, wherein a first valve of the preparation kettle is connected with a second valve and a third valve; the second valve is connected with a double-layer refrigeration pipe through a circulating pump, the double-layer refrigeration pipe is controlled by a refrigeration control unit, and the double-layer refrigeration pipe is connected with a visual pipe; the third valve is connected with the pressure regulator and the auxiliary pipeline through a pipeline, the pipeline is provided with a fourth valve, the fourth valve is connected with the vacuum pump, the auxiliary pipeline is connected with the visible pipe, and the auxiliary pipeline is provided with a pipeline heater; the computer is connected with a control cabinet, and the control cabinet is respectively connected with the pressure sensor, the temperature sensor, the pipeline heater and the refrigeration control unit. The invention realizes full-automatic control of the temperature of the fluid in the hydrate pipeline and provides guarantee for the research of the pipeline transportation mechanism of the natural gas hydrate.
Description
Technical Field
The invention relates to a pipeline fluid temperature control device, in particular to a temperature control device for simulating pipeline fluid in hydrate solid fluidization exploitation.
Background
The natural gas hydrate is a non-stoichiometric cage-shaped crystal substance generated by water and natural gas in a high-pressure low-temperature environment, is an unconventional energy source with high density and high heat value, is mainly distributed in marine and land permafrost zone sediments, wherein the resource amount of the marine natural gas hydrate is about one hundred times of that of a land permafrost zone, the exploitation of the marine natural gas hydrate is concerned, and the natural gas hydrate is generally considered to be the most potential alternative energy source in the 21 st century and is also a new energy source with the largest reserve which is not developed at present.
Since 2002, natural gas hydrates mainly comprising depressurization, heat injection and CO injection are successfully implemented in land permafrost and sea diagenetic or sand layer in Canada, United states and Japan respectively2And replacing the operation of trial mining with auxiliary operation. The natural gas hydrate is mined by taking the conventional methods of oil gas mining such as depressurization and the like as reference, the natural gas hydrate is essentially decomposed into water and gas in a reservoir, and the method is mainly suitable for the development of the sand natural gas hydrate reservoir with a certain trap structure. The Zhou defends the academician and puts forward a method aiming at the natural gas hydrate drilling sampling condition in the sea area of ChinaA novel solid fluidized mining method is a brand new mining mode for non-diagenetic rocks in deep water shallow layers of several meters to hundreds of meters, and is characterized in that hydrate ore bodies are developed in a solid form by mining equipment under the condition that the seabed temperature and pressure are relatively stable, sediments containing the hydrate are crushed into fine particles, then the fine particles are mixed with seawater, the sediments containing the hydrate are conveyed to an ocean platform by a closed pipeline, and then the sediments are subjected to post-treatment and processing on the ocean platform. In the related research of solid fluidization exploitation, hydrate pipeline transportation equipment is a vital part for the research of the decomposition and secondary generation mechanism of the natural gas hydrate, and the safety of the subsequent natural gas hydrate in the solid fluidization exploitation process is directly influenced.
At present, indoor experimental research is an important means for exploring exploitation of marine natural gas hydrates, water and natural gas are synthesized into natural gas hydrates in a preparation kettle or a pipeline under the conditions of high pressure and low temperature in a laboratory, and the reaction needs to be accurately controlled by a pipeline temperature control device, so that the change rule of phase content in the exploitation process of the natural gas hydrates and the flow mechanism of the natural gas hydrates solid fluidization exploitation pipeline are researched.
Disclosure of Invention
The invention aims to provide a temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid, which has the advantages of reliable principle and simple and convenient operation, can realize efficient, quick, accurate and full-automatic control on the temperature of the fluid in a hydrate pipeline, and can monitor, collect and store flow speed, pressure and temperature parameters in the experimental process in real time, thereby providing a powerful guarantee for the research on the gas hydrate pipeline transportation mechanism.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
A temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid comprises a pipeline flow simulation subsystem, a temperature control subsystem and a data acquisition and control subsystem.
The pipeline simulation subsystem comprises a preparation kettle, a first valve, a second valve, a third valve, a fourth valve, a circulating pump, a vacuum pump, a double-layer refrigeration pipe, a pressure regulator, an auxiliary pipeline and a visual pipe.
The outlet of the preparation kettle is connected with a first valve, the first valve is respectively connected with a second valve and a third valve, the second valve is connected with a double-layer refrigerating pipe through a circulating pump, the double-layer refrigerating pipe is connected with a visual pipe, the visual pipe is uniformly distributed with a pipeline pressure sensor group and a pipeline temperature sensor group, and two ends of the double-layer refrigerating pipe are respectively provided with a first pressure sensor, a first temperature sensor, a second temperature sensor and a second pressure sensor; the third valve is respectively connected with the pressure regulator and the fourth valve, the pressure regulator is connected with the visual pipe through an auxiliary pipeline, the pipeline heater is installed on the auxiliary pipeline, and the fourth valve is connected with the vacuum pump.
The temperature control subsystem comprises a pipeline heater, a double-layer refrigerating pipe and a refrigerating control unit, wherein the double-layer refrigerating pipe comprises a flange, a steel pipe, a refrigerant guide plate, a refrigerant inlet, a refrigerant outlet, a refrigerant guide cylinder and a cover plate; the refrigeration control unit is provided with a fifth valve and a sixth valve, the sixth valve is connected with a refrigerant inlet of the double-layer refrigeration pipe, and a refrigerant outlet is connected with the fifth valve.
The data acquisition and control subsystem comprises a computer, a control cabinet, a first pressure sensor, a first temperature sensor, a second pressure sensor, a pipeline pressure sensor group, a pipeline temperature sensor group and the like.
The computer is connected with a control cabinet, and the control cabinet is respectively connected with a first pressure sensor, a second pressure sensor, a first temperature sensor, a second temperature sensor, a pipeline pressure sensor group, a pipeline temperature sensor group, a pipeline heater, a refrigeration control unit, a circulating pump and a vacuum pump.
The visual pipe can be used for conveniently observing the phase content and the fluid state of the fluid in the pipeline.
Compared with the prior art, the invention has the following beneficial effects:
(1) the double-layer refrigeration pipe is arranged, so that the installation and maintenance can be conveniently carried out;
(2) the heat exchange efficiency of the refrigerant is improved by arranging the refrigerant guide plate;
(3) the automatic control of the whole set of device is realized by arranging a data acquisition and control subsystem.
Drawings
FIG. 1 is a schematic structural diagram of a temperature control device for hydrate solid fluidization production simulation pipeline fluid.
Fig. 2 is a schematic structural view of the double-layered refrigerant pipe of fig. 1.
In the figure: 1. the system comprises a computer, 2, a control cabinet, 3, a first valve, 4, a second valve, 5, a preparation kettle, 6, a third valve, 7, a circulating pump, 8, a fourth valve, 9, a vacuum pump, 10, a pressure regulator, 11, 15, a pressure sensor, 12, 14, a temperature sensor, 13, a pipeline heater, 16, a pipeline pressure sensor group, 17, a pipeline temperature sensor group, 18, a refrigeration control unit, 19, a fifth valve, 20, a sixth valve, 21, a flange, 22, a steel pipe, 23, a refrigerant guide plate, 24, a refrigerant inlet, 25, a refrigerant outlet, 26, a double-layer refrigeration pipe, 27, a visual pipe, 28, an auxiliary pipeline, 29, a refrigerant guide cylinder and 30, and a cover plate.
Detailed Description
The invention is further illustrated below with reference to the figures and examples in order to facilitate the understanding of the invention by a person skilled in the art. It is to be understood that the invention is not limited in scope to the specific embodiments, but is intended to cover various modifications within the spirit and scope of the invention as defined and defined by the appended claims, as would be apparent to one of ordinary skill in the art.
See fig. 1, 2.
A temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid comprises a computer 1, a control cabinet 2, a preparation kettle 5, a circulating pump 7, a double-layer refrigerating pipe 26, a refrigeration control unit 18, a visible pipe 27, a vacuum pump 9, a pressure regulator 10, an auxiliary pipeline 28 and a pipeline heater 13.
The first valve 3 of the preparation kettle 5 is connected with the second valve 4 and the third valve 6; the second valve is connected with a double-layer refrigerating pipe 26 through a circulating pump 7, the double-layer refrigerating pipe is controlled by a refrigerating control unit 18 and is connected with a visual pipe 27, pressure sensors (11 and 15) and temperature sensors (12 and 14) are arranged at two ends of the refrigerating pipe, and the visual pipe is provided with a pipeline pressure sensor group 16 and a pipeline temperature sensor group 17; the third valve is connected with the pressure regulator 10 and the auxiliary pipeline 28 through a pipeline, the fourth valve 8 is arranged on the pipeline, the fourth valve 8 is connected with the vacuum pump 9, the auxiliary pipeline is connected with the visual pipe, and the pipeline heater 13 is arranged on the auxiliary pipeline.
The double-layer refrigeration pipe 26 is composed of a flange 21, a steel pipe 22, a refrigerant guide plate 23, a refrigerant inlet 24, a refrigerant outlet 25, a refrigerant guide cylinder 29 and a cover plate 30, wherein the flanges 21 are arranged at two ends of the steel pipe 22, the refrigerant guide plate 23 is spirally and circularly wound around the steel pipe 22 and is positioned in the refrigerant guide cylinder 29, and two ends of an annular space between the refrigerant guide cylinder and the steel pipe are sealed by the cover plate 30.
The computer 1 is connected with a control cabinet 2, and the control cabinet is respectively connected with a pressure sensor, a temperature sensor, a pipeline pressure sensor group, a pipeline temperature sensor group, a pipeline heater, a refrigeration control unit, a circulating pump and a vacuum pump.
The refrigeration control unit 18 is provided with a fifth valve 19 and a sixth valve 20, the sixth valve is connected with a refrigerant inlet of the double-layer refrigeration pipe, and a refrigerant outlet is connected with the fifth valve.
Example 1
And starting a vacuum pump, and vacuumizing the whole experimental device until the set vacuum degree of the experiment is reached.
The experimental process of the hydrate decomposition rule is as follows:
(1) the refrigeration control unit exchanges heat. Starting a refrigeration control unit, enabling a refrigerant in the refrigeration control unit to enter a double-layer refrigeration pipe from a refrigerant inlet, enabling the refrigerant to flow along a snake-shaped space formed by a refrigerant guide plate, a steel pipe and a refrigerant guide cylinder, enabling the refrigerant to be in full contact with the steel pipe for heat exchange, promoting the refrigerant to be in full contact with the steel pipe by the refrigerant guide plate, improving the heat exchange efficiency, enabling the refrigerant after heat exchange with the steel pipe to flow out along a refrigerant outlet, enabling the refrigerant to enter the refrigeration control unit for secondary treatment through a fifth valve, enabling the treated refrigerant to enter the double-layer refrigeration pipe again for heat exchange according to the flow, and sequentially circulating to-and-fro for continuously exchanging heat for pipeline fluid until the experiment set; (2) the hydrate slurry is transported to a pipeline. Opening corresponding valves, starting a circulating pump at the same time, so that hydrate slurry in the preparation kettle is transferred into a circulating pipeline formed by the auxiliary pipeline and the visible pipe group, closing the first valve after the hydrate slurry is transferred, and driving the hydrate slurry to circularly flow in the circulating pipeline formed by the auxiliary pipeline and the visible pipe group by the circulating pump; (3) the hydrate slurry exchanges heat with the double-layer refrigerating pipe. In the circulating flow process, when the hydrate slurry flows through the double-layer refrigerating pipe, the hydrate slurry and the steel pipe carry out heat convection, the steel pipe and the high-temperature refrigerant carry out heat convection, and the heat of the refrigerant is finally transferred to the low-temperature hydrate slurry through the double-layer refrigerating pipe; (4) and (5) testing the hydrate decomposition rule. The pressure and the temperature of the inlet end and the outlet end of the double-layer refrigerating pipe are measured by the pressure sensor and the temperature sensor, whether the refrigerating control unit is continuously started or not is determined by comparing and analyzing the temperature data of hydrate slurry in the pipeline by the computer, the pressure control in the pipeline is completed by the pressure regulator, hydrate decomposition experiments under different temperature and pressure conditions are carried out, and the decomposition rule of the hydrate in the flowing process of the pipeline is researched by observing the pressure and temperature data collected by the visual pipe group, the pipeline pressure sensor group and the pipeline temperature sensor group.
In the experimental process, when the temperature of the hydrate slurry needs to be increased in a large range, the pipeline heater heats the pipeline until the temperature required by the experiment is reached.
Example 2
The experimental process of secondary generation of hydrate is as follows:
(1) the refrigeration control unit exchanges heat. Starting a refrigeration control unit, enabling residual fluid in a hydrate decomposition experiment to circularly flow in a circulating pipeline formed by an auxiliary pipeline and a visible pipe group under the driving of a circulating pump, and circularly and continuously refrigerating the pipeline fluid in a reciprocating manner according to the flow in the embodiment 1 until the temperature reaches the set temperature of the experiment; and 2, testing the secondary generation experimental rule of the hydrate. By developing hydrate generation experiments under different temperature and pressure conditions, the secondary hydrate generation rule of fluid in the pipeline flowing process is researched by observing pressure and temperature data collected by the visible pipe group, the pipeline pressure sensor group and the pipeline temperature sensor group, and pressure control in the pipeline in the experiment process is completed by the pressure regulator.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, etc.
Claims (2)
1. A temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid is composed of a computer (1), a control cabinet (2), a preparation kettle (5), a circulating pump (7), a double-layer refrigeration pipe (26), a refrigeration control unit (18), a visible pipe (27), a vacuum pump (9), a pressure regulator (10), an auxiliary pipeline (28) and a pipeline heater (13), and is characterized in that a first valve (3) of the preparation kettle (5) is connected with a second valve (4) and a third valve (6); the second valve is connected with a double-layer refrigerating pipe (26) through a circulating pump (7), the double-layer refrigerating pipe is controlled by a refrigerating control unit (18), the double-layer refrigerating pipe is connected with a visual pipe (27), pressure sensors (11 and 15) and temperature sensors (12 and 14) are arranged at two ends of the refrigerating pipe, and the visual pipe is provided with a pipeline pressure sensor group (16) and a pipeline temperature sensor group (17); the third valve is connected with a pressure regulator (10) and an auxiliary pipeline (28) through a pipeline, the pipeline is provided with a fourth valve (8), the fourth valve is connected with a vacuum pump (9), the auxiliary pipeline is connected with a visible pipe, and the auxiliary pipeline is provided with a pipeline heater (13); the double-layer refrigeration pipe (26) consists of a flange (21), a steel pipe (22), a refrigerant guide plate (23), a refrigerant inlet (24), a refrigerant outlet (25), a refrigerant guide cylinder (29) and a cover plate (30), wherein the flanges (21) are arranged at two ends of the steel pipe (22), the refrigerant guide plate (23) is spirally surrounded around the steel pipe and is positioned in the refrigerant guide cylinder (29), and two ends of an annular space between the refrigerant guide cylinder and the steel pipe are sealed by the cover plate (30); the computer (1) is connected with the control cabinet (2), and the control cabinet is respectively connected with the pressure sensor, the temperature sensor, the pipeline pressure sensor group, the pipeline temperature sensor group, the pipeline heater, the refrigeration control unit, the circulating pump and the vacuum pump.
2. The temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid as claimed in claim 1, wherein the refrigeration control unit (18) is provided with a fifth valve (19) and a sixth valve (20), the sixth valve is connected with a refrigerant inlet of the double-layer refrigeration pipe, and a refrigerant outlet is connected with the fifth valve.
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| CN202011033584.4A CN112162578A (en) | 2020-09-27 | 2020-09-27 | Temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid |
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| CN202011033584.4A CN112162578A (en) | 2020-09-27 | 2020-09-27 | Temperature control device for hydrate solid fluidization exploitation simulation pipeline fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445966A (en) * | 2021-08-02 | 2021-09-28 | 西南石油大学 | Ocean natural gas hydrate exploitation analogue means |
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| CN207892545U (en) * | 2018-03-08 | 2018-09-21 | 吉林大学 | Impact rotating formula gas hydrate hole-bottom frozen cord coring drill |
| CN109187215A (en) * | 2018-09-30 | 2019-01-11 | 中国矿业大学 | A kind of sea area hydrate in-situ preparation and triaxial tests pressure chamber and its application method |
| CN208969516U (en) * | 2018-12-11 | 2019-06-11 | 西南石油大学 | A kind of regulator of the defeated pilot system of gas hydrates pipe |
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2020
- 2020-09-27 CN CN202011033584.4A patent/CN112162578A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551060A (en) * | 2009-04-30 | 2009-10-07 | 华南理工大学 | Method and device for integrated utilization of natural gas pipe network pressure energy refrigeration and hydrate |
| CN106089193A (en) * | 2016-07-05 | 2016-11-09 | 高琴 | Gas hydrates exploitation seabed rock deformation analogue experiment installation and experimental technique |
| CN108360994A (en) * | 2018-03-08 | 2018-08-03 | 吉林大学 | Impact rotating formula gas hydrate hole-bottom frozen cord coring drill and method |
| CN207892545U (en) * | 2018-03-08 | 2018-09-21 | 吉林大学 | Impact rotating formula gas hydrate hole-bottom frozen cord coring drill |
| CN109187215A (en) * | 2018-09-30 | 2019-01-11 | 中国矿业大学 | A kind of sea area hydrate in-situ preparation and triaxial tests pressure chamber and its application method |
| CN208969516U (en) * | 2018-12-11 | 2019-06-11 | 西南石油大学 | A kind of regulator of the defeated pilot system of gas hydrates pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113445966A (en) * | 2021-08-02 | 2021-09-28 | 西南石油大学 | Ocean natural gas hydrate exploitation analogue means |
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Application publication date: 20210101 |