CN116617943A - High-temperature high-pressure reaction kettle for in-situ extraction of high-temperature hot-liquid fluid and application - Google Patents

Abstract

The invention provides a high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ, comprising a reactor body and a reactor cover, and the reactor cover is used to seal the reactor body to form a reactor cavity; The high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes at least one heat-conducting flexible reaction chamber, the flexible reaction chamber is arranged in the main body of the reactor, and the flexible reaction chamber is in a sealed state; the first conduit runs through it sequentially from outside to inside The cover plate of the reaction kettle and the flexible reaction chamber allow one end of the first conduit to communicate with the flexible reaction chamber, and the other end of the first conduit to communicate with the collector. The invention also provides the application of the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ. The high-temperature and high-pressure reactor for in-situ extraction of high-temperature and high-pressure hydrothermal fluids of the invention can extract in-situ hydrothermal fluids under high-temperature and high-pressure conditions.

Description

A high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid and its application

technical field

The invention relates to the technical field of geochemistry, in particular to an experimental geochemical reaction device, and more specifically to a high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid and its application.

Background technique

As one of the important constituents of the earth, hydrothermal fluid plays a vital role on the earth's surface and in various inner circles. Compared with the solid rocks and minerals that occupy the main body of the earth's interior, fluids have higher physical and chemical activities, and are an important medium for the transmission of matter and energy in the earth's interior. Like human blood, fluids exchange and circulate between different layers of the earth through subduction, magmatic activity and other geological processes, which have an important impact on the migration and circulation of elements inside the earth.

In earth science and environmental science, it is often necessary to use high temperature and high pressure experiments to explore how elements migrate in hydrothermal fluids, how minerals or rocks interact with hydrothermal fluids, etc., which are very important for the study of the cycle of substances in the earth system meaning. However, since hydrothermal fluid is a liquid substance mainly composed of aqueous solution, under high temperature and high pressure conditions, it has the characteristics of strong fluidity, strong volatility, low viscosity, and difficult quenching, which also has high requirements for high temperature and high pressure experimental equipment. Existing devices are difficult to carry out experiments under high temperature and high pressure conditions for hydrothermal fluids.

In addition, the quenching of the existing device after the experiment will lead to the precipitation of minerals in the reaction fluid, which makes it difficult to analyze the chemical composition of the hydrothermal fluid, and cannot realize real-time in-situ observation and quantitative testing of the physical and chemical properties of the experimental substance at the same time.

Contents of the invention

In view of this, the present invention provides a high-temperature and high-pressure reactor for in-situ extraction of high-temperature and high-pressure hydrothermal fluids and its application, which can simultaneously complete high-temperature and high-pressure experiments and in-situ extraction of hydrothermal fluids under high-temperature and high-pressure conditions, and can precisely control The sample size of related hydrothermal experiments can also improve the test accuracy.

In a first aspect, the present invention provides a high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid, including a reactor body and a reactor cover, and the reactor cover is used to seal the reactor body to Form a reaction kettle cavity;

The high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes at least one heat-conducting flexible reaction chamber, the flexible reaction chamber is arranged in the main body of the reactor, and the flexible reaction chamber is in a sealed state;

The high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes at least one high-temperature and high-pressure-resistant first conduit and at least one collector, the collector is arranged outside the reactor cavity, and the first The conduits pass through the reactor cover and the flexible reaction chamber sequentially from outside to inside so that one end of the first conduit communicates with the flexible reaction chamber, and the other end of the first conduit communicates with the collector.

The present invention is used in high-temperature and high-pressure reactors for in-situ extraction of high-temperature hydrothermal fluids. The reactor cavity is assembled by the reactor body and the reactor cover. A heat-conducting flexible reaction chamber is also provided in the reactor cavity, because the flexible The heat conduction effect of the reaction chamber makes the temperature inside the flexible reaction chamber consistent with the internal temperature of the reactor cavity, and because the flexible reaction chamber is a flexible material, it has the function of conducting pressure. In actual use, the pressure inside the flexible reaction chamber and the internal pressure of the reactor cavity Keep consistent, so that the temperature and pressure inside the flexible reaction chamber can be controlled by controlling the temperature and pressure of the reactor, so that the high temperature and high pressure conditions required by geochemical reactions can be met. More importantly, the flexible reaction chamber has good ductility and compressibility, is more suitable for transmitting pressure and is easier to restore its shape after the reaction, so it is suitable as a reaction vessel under high temperature and high pressure conditions.

The high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid in the present invention also includes a first conduit and at least one collector. One end communicates with the flexible reaction chamber, and the collector is arranged outside the reactor cavity and communicates with the other end of the first conduit, so that the flexible reaction chamber communicates with the external collector through the first conduit. When carrying out high-temperature and high-pressure geochemical reactions, the hydrothermal fluid in the flexible reaction chamber can be directly output to the collector through the first conduit by controlling the pressure and used for subsequent detection and analysis, realizing in-situ extraction of hydrothermal fluid under high-temperature and high-pressure conditions The fluid can not only accurately control the sample volume of related hydrothermal experiments, but also improve the test accuracy. The high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid can realize the reaction of hydrothermal fluid under the conditions of 250-550°C and 20-55MPa, observe physical and chemical properties in situ and sample for chemical composition analysis after the experiment. In addition, by setting an internal and external double-chamber structure, the reaction solution is prevented from polluting the reactor body, and the sample loading capacity is large.

Preferably, the flexible reaction chamber includes a flexible metal sleeve, an upper splint and a lower splint, the port of the flexible metal sleeve is set as an annular flange, the upper splint is provided with a first through hole, and the lower splint is set There is a second through hole;

When assembling the flexible reaction chamber, the upper splint abuts against one side of the annular flange, and the lower splint abuts against the other side of the annular flange for sealing the flexible metal sleeve; the first conduit passes through the first through hole in turn and the second through hole to realize the communication between the first conduit and the flexible reaction chamber. Thus, the flexible metal sleeve is closed to form a flexible reaction chamber by the lower clamping plate being fitted with the flexible metal sleeve and abutting against the lower end of the annular flange, and the upper clamping plate being abutted against the upper end of the annular flange. In addition, the first conduit passes through the first through hole and the second through hole sequentially from top to bottom, and inserts the flexible metal sheath through the port of the flexible metal sheath, so that the flexible reaction chamber communicates with the outside through the first conduit, which is convenient from the flexible The high temperature hydrothermal fluid is extracted in situ in the reaction chamber.

Preferably, the corresponding positions of the annular flange, the upper splint and the lower splint are all provided with locking holes. When assembling the flexible reaction chamber, the screw rods pass through the locking holes of the upper splint, the annular flange, and the lower splint in sequence for Sealed flexible metal sleeve. Thus, the upper clamping plate and the lower clamping plate clamp the upper and lower surfaces of the annular flange from the upper and lower ends to close the port of the flexible metal sleeve. The corresponding positions of the annular flange, the upper splint and the lower splint are all provided with locking holes, through which the screw passes through the locking holes of the annular flange, the upper splint and the lower splint in sequence, and the upper splint and the lower splint are pressed against the annular flange. The closed flexible reaction chamber can be better realized.

Preferably, the flexible metal sleeve is a flexible reaction chamber made of inert metal material. The inert metal material has good acid and alkali corrosion resistance and ductility. Therefore, it is more suitable for high temperature and high pressure reactions of hydrothermal fluids with different chemical compositions. This chemical stability makes it very suitable for making reaction chambers for chemical reaction experiments. It can be cleaned with strong acid at room temperature for repeated use.

Preferably, the flexible metal sleeve is a flexible reaction chamber made of gold, silver, copper or platinum, and the upper splint, lower splint and first conduit are all made of titanium and subjected to high temperature annealing treatment. Gold, silver, copper or platinum all have good acid and alkali corrosion resistance and ductility. Under certain temperature and pressure conditions, they hardly react with various acids and bases except aqua regia. This chemical stability makes them very It is suitable to be made into a reaction chamber to carry out chemical reaction experiments, and can be cleaned with strong acid at room temperature for repeated use. More importantly, gold, silver, copper, or platinum all have good ductility and compressibility, which are more suitable for transmitting pressure and are easier to restore the shape after the reaction. Therefore, they are suitable as reaction vessels under high temperature and high pressure conditions. The upper splint, the lower splint and the first conduit are all made of titanium and subjected to high-temperature annealing treatment. After high-temperature annealing, the surface of titanium will be oxidized to form an inert acid-base resistant oxidation layer.

More preferably, the flexible metal sheath is arranged in a cylindrical shape, and the thickness of the flexible metal sheath is 0.2-1 mm.

Preferably, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes a reactor fixture, and the reactor fixture includes a groove for accommodating the main port of the reactor and the edge of the cover plate of the reactor. The reaction kettle fixture is provided with a screw hole, and the screw hole penetrates from the side of the reaction kettle fixture to the groove;

When assembling the reactor cavity, the edge of the reactor cover abuts against the port of the reactor body, and both the edge of the reactor cover and the port of the reactor body are embedded in the groove of the reactor fixture, and the screw passes through the screw hole to Butt against the main body of the reactor or the cover of the reactor. Therefore, by setting the reactor clamp, the reactor cover and the reactor body can be better clamped, preventing the reactor from being tightly sealed under high temperature and high pressure conditions, and improving the safety of the reactor. By setting the screw holes, it is also convenient to fine-tune the positions of the cover plate of the reactor and the main body of the reactor, and when the two positions are aligned, the screw rod is adjusted to further compress the reactor.

Preferably, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ further includes a sealing gasket, and the sealing gasket is arranged between the reactor cover and the reactor main body;

When assembling the reactor cavity, the edge of the reactor cover abuts against one side of the sealing gasket, and the port of the reactor main body abuts against the other side of the sealing gasket. Therefore, the cover plate of the reaction kettle and the main body of the reaction kettle can be better clamped by arranging the sealing gasket, so as to prevent the reaction kettle from being tightly sealed under high temperature and high pressure conditions.

More preferably, the sealing gasket is a copper sealing gasket.

Preferably, a temperature control system is also included, the temperature control system includes an annular heating furnace and a thermocouple, and the annular heating furnace is arranged to surround the main body of the reactor for heating the main body of the reactor;

The thermocouple is arranged in the main body of the reactor for detecting the temperature of the main body of the reactor. Thus, the temperature of the reactor can be controlled in real time by setting the annular heating furnace and the thermocouple.

Preferably, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes a pressure control system, the pressure control system includes an air compressor, a pressure gauge and a second conduit, and one end of the second conduit is connected to the air A compressor, the other end of the second conduit communicates with the reactor cavity;

When the air compressor is in use, water is pressed into the cavity of the reactor to control the pressure in the main body of the reactor, and the pressure gauge is used to monitor the pressure inside the cavity of the reactor. Therefore, by setting the air compressor and the pressure gauge, the pressure of the reactor can be controlled in real time, and a water storage tank can be installed in a specific application.

In the second aspect, the present invention also provides the application of a high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid.

The high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluids is applied in geochemical reactions, which can accurately simulate high-temperature and high-pressure reaction conditions, and can also in-situ extract high-temperature and high-pressure hydrothermal fluids from flexible reaction chambers at any time based on demand , which can not only accurately control the sample volume of the in-situ extraction experiment, but also improve the test accuracy.

The advantages of the present invention will be partly clarified in the following description, and part of them will be obvious from the description, or can be known through the implementation of the embodiments of the present invention.

Description of drawings

In order to illustrate the content of the present invention more clearly, it will be described in detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural representation of the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ in the present invention;

Fig. 2 is a schematic structural view of the flexible reaction chamber in Fig. 1;

Fig. 3 is a sectional view of the flexible reaction chamber in Fig. 1;

Fig. 4 is a schematic structural view of the reactor cavity in Fig. 1 .

Detailed ways

The following description is a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

The invention provides a high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid, which comprises a reactor body and a reactor cover, and the reactor cover is closed on the reactor body to form a reactor cavity. The high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluids also includes a flexible reaction chamber. Specifically, the flexible reaction chamber is a sealed reaction chamber that accommodates relevant geochemical reaction raw materials and provides a reaction space. When assembling, the flexible reaction chamber is set in the main body of the reaction kettle, and the flexible reaction chamber has a heat conduction function, which can transfer the heat in the high-temperature and high-pressure reaction kettle to the flexible reaction chamber, so that the flexible reaction chamber has the function of simulating high-temperature reaction conditions; and because The flexible reaction chamber has certain flexibility, and can transmit the pressure in the reaction kettle to the flexible reaction chamber, so that the flexible reaction chamber has the function of simulating high-pressure reaction conditions. In a specific embodiment, based on actual needs, the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid may include one or more flexible reaction chambers, and one or more flexible reaction chambers are used to accommodate the same or different Reaction raw material.

In addition, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes a first conduit and a collector, and the collector is arranged outside the cavity of the reactor to collect the high-temperature hydrothermal fluid extracted in situ from the flexible reaction chamber. The specific structure is: the first conduit runs through the cover plate of the reaction kettle and the flexible reaction chamber sequentially from outside to inside so that the lower end of the first conduit communicates with the flexible reaction chamber, and the upper end of the first conduit communicates with the collector. When specifically collecting high-temperature hydrothermal fluid, by controlling the pressure in the reactor or the pressure in the collector, the high-temperature hydrothermal fluid in the flexible reaction chamber can be extracted into the collector, realizing in-situ extraction of high-temperature hydrothermal fluid for subsequent use Detection analysis. At the same time, since the flexible reaction chamber is isolated from the main body of the reaction kettle, the reaction kettle body will not be polluted, and the sample loading capacity is large. In a specific embodiment, both the first conduit and the collector should be made of materials resistant to high temperature and high pressure, so as to prevent damage caused by high temperature and high pressure during the test, and also prevent leakage of hydrothermal fluid. The number of first conduits and collectors can be set based on actual needs, the same conduit can communicate with different collectors, or several first conduits can communicate with several collectors one-to-one.

In a specific embodiment, the flexible reaction chamber includes a flexible metal sleeve (similar to a sleeve), an upper clamping plate and a lower clamping plate, and the port of the flexible metal sleeve is set as an annular flange (similar to a ring flange set at the mouth of the sleeve), The upper splint is provided with a first through hole, and the lower splint is provided with a second through hole. When assembling the flexible reaction chamber, the upper splint abuts against the upper end surface of the annular flange, and the lower splint is sleeved on the flexible metal sleeve from bottom to top and abuts against the lower end surface of the annular flange, thereby sealing the flexible metal sleeve through a flange-like structure. The first conduit passes through the first through hole and the second through hole sequentially from top to bottom to realize communication between the first conduit and the flexible reaction chamber. In other embodiments, the flexible reaction chamber can also be sealed in other ways to ensure that the flexible reaction chamber communicates with the external collector only through the first conduit.

In a specific embodiment, the corresponding positions of the annular flange, the upper clamping plate and the lower clamping plate are all provided with locking holes. When assembling the flexible reaction chamber, the screw rod passes through the upper clamping plate, the annular flange and the lower clamping plate sequentially from top to bottom. The locking hole is locked with a nut on the bottom surface of the lower splint, thereby realizing the sealing of the flexible metal sleeve. In other embodiments, the annular flange, the upper clamping plate and the lower clamping plate can also be locked in other ways, such as welding.

In a specific embodiment, the flexible metal sheath is a flexible reaction chamber made of inert metal material. Specifically, it may be a flexible reaction chamber made of gold, silver, copper or platinum. More preferably, the flexible metal sheath is arranged in a cylindrical shape, and the thickness of the flexible metal sheath is 0.2-1 mm.

In a specific embodiment, the upper splint, the lower splint and the first conduit are all made of high temperature resistant metal materials. Specifically, it may be made of titanium material and subjected to high-temperature annealing treatment.

In a specific embodiment, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes a reactor fixture, and the reactor fixture includes a groove structure, and a screw hole is provided on the reactor fixture, and the screw hole is from The side of the kettle clamp runs through to the groove. When assembling the reactor cavity, the edge of the reactor cover abuts the port of the reactor body, and the edge of the reactor cover and the port of the reactor body are embedded in the groove of the reactor fixture, and then the screw passes through the screw hole to abut against The main body of the reactor or the cover of the reactor, thereby squeezing the cover of the reactor to cover the main body of the reactor tightly. In other embodiments, the reactor clamp can also be replaced by other connection mechanisms, for example, by setting buckles to fasten the reactor cover and the reactor body.

In a specific embodiment, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ further includes a sealing gasket. When assembling the reactor cavity, the edge of the reactor cover abuts against one side of the sealing gasket, and the port of the reactor main body abuts against the other side of the sealing gasket. In a specific embodiment, the sealing gasket can be selected as a copper gasket.

In a specific embodiment, the high-temperature and high-pressure reactor used for in-situ extraction of high-temperature hydrothermal fluid can be heated and controlled by an external temperature control system, or a temperature control system can be installed on the reactor. Specifically, the temperature control system includes an annular heating furnace and a thermocouple. The annular heating furnace is arranged around the main body of the reactor for heating the main body of the reactor. The thermocouple is arranged inside the main body of the reactor for detecting the temperature of the main body of the reactor. In other embodiments, the annular heating furnace and thermocouples can also be replaced by other heating mechanisms or temperature detectors.

In a specific embodiment, the high-temperature and high-pressure reactor used for in-situ extraction of high-temperature hydrothermal fluid can realize the high-pressure effect by controlling the temperature, and a pressure control system can also be installed on the reactor. Specifically, the pressure control system includes an air compressor, a pressure gauge and a second conduit, one end of the second conduit is connected to the air compressor, and the other end of the second conduit communicates with the cavity of the reactor. When the air compressor is used, water is pressed into the reactor cavity to control the pressure inside the reactor body, and the pressure gauge is used to monitor the internal pressure of the reactor cavity.

Example 1

As shown in FIG. 1 , it is a schematic structural diagram of a high-temperature and high-pressure reactor used for in-situ extraction of high-temperature hydrothermal fluid in this embodiment. Figure 1 is a high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid in this embodiment, including a reactor body 1 and a reactor cover 2, and the reactor cover 2 is covered on the reactor body 1 to form Reactor cavity. In a specific embodiment, the reactor cavity can be a common stainless steel reactor.

The high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluids also includes a flexible reaction chamber 3, specifically, the flexible reaction chamber 3 is a sealed reaction chamber that accommodates relevant geochemical reaction raw materials and provides a reaction space. During assembly, the flexible reaction chamber 3 is set in the main body of the reaction kettle 1, and the flexible reaction chamber 3 has a heat conduction function, which can transfer the heat in the high-temperature and high-pressure reaction kettle to the flexible reaction chamber 3, so that the flexible reaction chamber 3 has simulated high-temperature reaction conditions function; and because the flexible reaction chamber 3 has a certain degree of flexibility, it can transmit the pressure in the reaction kettle to the flexible reaction chamber 3, so that the flexible reaction chamber 3 has the function of simulating high-pressure reaction conditions.

In a specific embodiment, based on actual needs, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ may include one or more flexible reaction chambers 3, and one or more flexible reaction chambers 3 are used to accommodate the same or different reaction materials. In this embodiment, a flexible reaction chamber 3 is provided in the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid.

The high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes a first conduit 4, a collector 5 and a collector 6, and both the collector 5 and the collector 6 are arranged outside the reactor cavity for collecting the fluid from the flexible reaction vessel. The high-temperature hydrothermal fluid extracted in situ in the chamber 3, the specific connection structure is: the first conduit 4 runs through the reactor cover 2 and the flexible reaction chamber 3 from the outside to the inside so that the lower end of the first conduit 4 communicates with the flexible reaction chamber 3, The upper ends of the first conduit 4 communicate with the collector 5 and the collector 6 respectively. In actual use, a valve can be set on the first conduit 4 or the collector 5 and the collector 6. After the valve is opened, since the pressure of the collector 5 and the collector 6 is lower than the pressure of the flexible reaction chamber 3, the hydrothermal fluid flows along the first Conduit 4 leads to collector 5 and collector 6 . The design of two sample collections can ensure the accurate determination of the chemical composition of the solution in the solution analysis test experiment. In other embodiments, for the sake of simplifying the design or operation, only one collector may be included, or two first conduits may communicate with the two collectors one-to-one, so as to extract the solution to meet the needs of real-time analysis and detection. In this embodiment, the first conduit 4 is a titanium conduit, and both the collector 5 and the collector 6 are sampling containers made of titanium.

In a specific embodiment, as shown in Figures 1-3, the flexible reaction chamber 3 includes a flexible metal sheath 31, an upper splint 32 and a lower splint 33, the flexible metal sheath 31 is similar to a sheath with only an open upper end, and the flexible metal sheath 31 An annular flange 311 is arranged at the opening of the upper end, the upper splint 32 is provided with a first through hole 320 , and the lower splint 33 is provided with a second through hole 330 . When assembling the flexible reaction chamber 3, the upper clamping plate 32 abuts against the upper end surface of the annular flange 311 from top to bottom, and the lower clamping plate 33 fits the flexible metal sleeve 31 through the second through hole 330 from bottom to top and abuts the annular flange 311 the lower end face. Thus, the upper clamping plate 32 and the lower clamping plate 33 are assembled into a flange-like structure to seal the upper opening of the flexible metal sleeve 31 , thereby forming a closed flexible reaction chamber 3 . The upper splint 32 is provided with a first through hole 320. During use, the first conduit 4 can be passed through the first through hole 320 from top to bottom and inserted into the flexible metal sheath 31 from the upper opening of the flexible metal sheath 31 to realize The first conduit 4 communicates with the flexible reaction chamber 3 .

In a specific embodiment, locking holes 34 are provided at the corresponding positions of the annular flange 311, the upper splint 32 and the lower splint 33. When assembling the flexible reaction chamber 3, the screw rods are sequentially passed through the upper splint 32, The annular flange 311 and the locking hole 34 of the lower clamping plate 33 are locked with nuts on the bottom surface of the lower clamping plate 33 , thereby realizing the sealing of the flexible metal sleeve 31 . In other embodiments, the annular flange 311 , the upper clamping plate 32 and the lower clamping plate 33 can also be connected in other ways.

In a specific embodiment, the flexible metal sheath 31 is a flexible reaction chamber made of an inert metal material, more specifically, a flexible reaction chamber made of gold, silver, copper or platinum. In this embodiment, the flexible metal sheath 31 is arranged in a cylindrical shape, and the thickness of the flexible metal sheath 31 is 0.2-1 mm, and the metal foil can ensure the flexibility of the flexible metal sheath 31 .

In a specific embodiment, as shown in FIG. 4 , the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid further includes a reactor fixture 7 . After the edge 21 of the cover plate of the reactor is closed on the port 11 of the main body of the reactor, the edge 21 of the cover plate of the reactor and the port 11 of the main body of the reactor are clamped through the groove of the reactor fixture 7, so as to prevent the pressure relief of the reactor. It can also enhance the safety of the reactor. In a more specific embodiment, a screw hole 71 may also be provided on the reactor fixture 7 , and the screw hole 71 penetrates from the side of the reactor fixture 7 to the groove. When in use, the screw rod can be passed through the screw hole 71 to abut against the edge 21 of the cover plate of the reaction kettle to further enhance the sealing performance of the reaction kettle. In other embodiments, the screw can also pass through the screw hole 71 , the edge 21 of the cover plate of the reaction kettle and the port 11 of the main body of the reaction kettle, which also has the function of enhancing the sealing performance of the reaction kettle.

In a specific embodiment, as shown in Figure 4, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes a sealing gasket 8, and the sealing gasket 8 is arranged between the reactor cover plate 2 and the reactor main body 1 . When assembling the reactor cavity, the edge 21 of the cover plate of the reactor abuts against the upper surface of the gasket 8 , and the port 11 of the main body of the reactor abuts against the lower surface of the gasket 8 . In this embodiment, the gasket is a copper gasket.

In a specific embodiment, as shown in FIG. 1 , the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid also includes a temperature control system. Specifically, the temperature control system includes an annular heating furnace 91 and a thermocouple 92 , and the annular heating furnace 91 is arranged around the reactor main body 1 for heating the reactor main body 1 . The thermocouple 92 is disposed in the reactor main body 1 for detecting the temperature of the reactor main body 1 . In this embodiment, three thermocouples 92 can be provided, which are arranged at the upper, middle and lower positions of the reactor main body 1 , and are respectively used to detect the temperature of different positions of the reactor main body 1 . In other embodiments, the heating furnace can also be set in other shapes, and can also be set at the bottom of the heating reactor body 1 or other positions, and the thermocouple 92 can also be replaced by other temperature detection devices.

In a specific embodiment, the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluids also includes a pressure control system, the pressure control system includes an air compressor 101, a pressure gauge 102 and a second conduit 103, and the upper end of the second conduit 103 is The air compressor 101 is connected, and the lower end of the second conduit 103 communicates with the cavity of the reaction kettle. When in use, water is pressed into the cavity of the reaction kettle through an air compressor to increase the pressure in the main body of the reaction kettle 1 . The pressure gauge 102 communicates with the second conduit 103 for monitoring the internal pressure of the reactor cavity. In other embodiments, a pressure relief valve may also be provided on the second conduit 103 to reduce the pressure in the reactor main body 1 when the critical pressure is exceeded, so as to control the pressure in the reactor main body 1 to be lower than the safety pressure.

In a specific embodiment, the high-temperature and high-pressure reactor for extracting high-temperature hydrothermal fluid in situ also includes an insulation layer 12, and the insulation layer 12 is arranged to surround the reactor main body 1, thereby preventing the internal heat of the reactor main body 1 from being too rapid. Give way. More specifically, the insulation layer 12 can also surround the annular heating furnace 91, and the annular heating furnace 91 surrounds the main body of the reaction kettle 1, so as to better lock heat.

Example 2

An application implementation of a chemical reaction is given to illustrate the specific application process of the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid of the present invention. Under the condition of 250～500℃ and 40MPa, the experiment of Ba isotope fractionation between barite and NaCl fluid was carried out.

Due to the high temperature and pressure in this experiment, the existing experimental equipment is difficult to achieve in-situ extraction of the solution after the reaction for chemical composition measurement, while the high-temperature and high-pressure reactor for in-situ extraction of high-temperature hydrothermal fluid in Example 1 can achieve the request. First, we calculated the volume of the experimental liquid that needs to be added according to the experimental temperature and pressure, and the volume of the sample chamber; then we added BaSO ₄ and NaCl-BaCl ₂ solutions into the flexible reaction chamber 3 made of gold. After sealing the flexible reaction chamber 3 with a titanium sealing ring, put it into the main body of the stainless steel reactor, add a cover plate and a clamp and seal it with a nut, pressurize it to about 20MPa with a booster pump, insert a thermocouple, and then slowly raise the temperature. During the heating process, monitor the change of the pressure indicator, and pay attention to whether there is water flowing out from the sealing position of the autoclave; if there is water leakage, stop the experiment immediately and wait for the cooling to check the sealing problem; if the pressure continues to rise, gradually use the pressure relief device to outward Drain and keep the pressure indicator near the target pressure of 40MPa. During the experiment, 1ml of the experimental solution was taken out twice through the valve control, and the pH test and the ICP-MS test were performed to measure the concentration of Ba and the Ba isotope composition of the solution measured by MC-ICP-MS. The high-temperature and high-pressure reaction kettle used for in-situ extraction of high-temperature hydrothermal fluid can realize real-time sampling and detection of experimental hydrothermal fluid, and can test the pH and various chemical compositions of fluid samples.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. The high-temperature high-pressure reaction kettle for in-situ extraction of high-temperature hot-liquid fluid is characterized by comprising a reaction kettle main body and a reaction kettle cover plate, wherein the reaction kettle cover plate is used for sealing the reaction kettle main body to form a reaction kettle cavity;

the high-temperature high-pressure reaction kettle for in-situ extraction of high-temperature hot-liquid fluid also comprises at least one heat-conducting flexible reaction cavity, wherein the flexible reaction cavity is arranged in the reaction kettle main body and is in a sealing state;

the high-temperature high-pressure reaction kettle for in-situ extraction of high-temperature high-pressure hot-liquid fluid further comprises at least one high-temperature high-pressure resistant first conduit and at least one collector, wherein the collector is arranged outside the reaction kettle cavity, the first conduit sequentially penetrates through the reaction kettle cover plate and the flexible reaction cavity from outside to inside so that one end of the first conduit is communicated with the flexible reaction cavity, and the other end of the first conduit is communicated with the collector.

2. The high-temperature high-pressure reaction kettle according to claim 1, wherein the flexible reaction cavity comprises a flexible metal sleeve, an upper clamping plate and a lower clamping plate, an annular flange is arranged at a port of the flexible metal sleeve, a first through hole is formed in the upper clamping plate, and a second through hole is formed in the lower clamping plate;

when the flexible reaction cavity is assembled, the upper clamping plate is abutted against one surface of the annular flange, and the lower clamping plate is sleeved with the flexible metal sleeve and is abutted against the other surface of the annular flange, so that the flexible metal sleeve is sealed; the first conduit sequentially passes through the first through hole and the second through hole to realize the communication between the first conduit and the flexible reaction cavity.

3. The autoclave of claim 1, wherein the corresponding positions of the annular flange, the upper clamping plate and the lower clamping plate are provided with locking holes, and when the flexible reaction chamber is assembled, the screw rod sequentially passes through the locking holes of the upper clamping plate, the annular flange and the lower clamping plate to be used for sealing the flexible metal sleeve.

4. The high temperature high pressure reactor according to claim 1, wherein the flexible metal sleeve is a flexible reaction chamber made of an inert metal material.

5. The autoclave of claim 4, wherein the flexible metal sheath is a flexible reaction chamber made of gold, silver, copper or platinum, and the upper clamping plate, the lower clamping plate and the first conduit are made of titanium material and are subjected to high-temperature annealing treatment.

6. The high-temperature high-pressure reaction kettle according to claim 1, wherein the high-temperature high-pressure reaction kettle for in-situ extraction of high-temperature hot-liquid fluid further comprises a reaction kettle clamp, the reaction kettle clamp comprises a groove for accommodating a main body port of the reaction kettle and the edge of a reaction kettle cover plate, the reaction kettle clamp is provided with a screw hole, and the screw hole penetrates from the side surface of the reaction kettle clamp to the groove;

when the reaction kettle cavity is assembled, the edge of the reaction kettle cover plate is abutted to the port of the reaction kettle main body, the edge of the reaction kettle cover plate and the port of the reaction kettle main body are embedded into the groove of the reaction kettle clamp, and the screw rod penetrates through the screw hole to be abutted to the reaction kettle main body or the reaction kettle cover plate.

7. The high temperature high pressure reactor according to claim 6, wherein the high temperature high pressure reactor for in situ extraction of high temperature hot liquid fluid further comprises a sealing gasket, the sealing gasket being disposed between the reactor cover plate and the reactor body;

when the reaction kettle cavity is assembled, the edge of the reaction kettle cover plate is abutted against one surface of the sealing gasket, and the port of the reaction kettle main body is abutted against the other surface of the sealing gasket.

8. The high temperature, high pressure reactor according to claim 1, further comprising a temperature control system comprising an annular heating furnace and a thermocouple, the annular heating furnace being disposed around the reactor body for heating the reactor body;

the thermocouple is arranged in the reaction kettle main body and used for detecting the temperature of the reaction kettle main body.

9. The high-temperature high-pressure reaction kettle according to claim 1, wherein the high-temperature high-pressure reaction kettle for in-situ extraction of high-temperature hot-liquid fluid further comprises a pressure control system, the pressure control system comprises an air compressor, a pressure gauge and a second conduit, one end of the second conduit is connected with the air compressor, and the other end of the second conduit is communicated with a reaction kettle cavity;

when the air compressor is used, water is pressed into the reaction kettle cavity to control the pressure in the reaction kettle main body, and the pressure gauge is used for monitoring the pressure in the reaction kettle cavity.

10. Use of a high temperature high pressure reactor as claimed in claims 1-9.