A device for promoting hydrate synthesis

Abstract

The present invention discloses a device for promoting hydrate synthesis, comprising a reactor, wherein the reactor comprises a reactor body, a reactor cover and a ventilation component, wherein the ventilation component comprises an air intake unit, a liquid inlet pipe and a discharge unit, wherein the air intake unit is configured to have a variable air pipe cross-sectional area, so that after entering the air intake unit, the external gas can mix with the liquid sucked through the liquid inlet pipe to generate micro-nano bubbles, and then return to the inner cavity through the discharge unit. The present invention has the function of promoting the synthesis of natural gas hydrates. At the same time, the present device can be widely applied to laboratory synthesis processes of various types of gas hydrate samples.

Description

Technical Field

[0001] The invention relates to the field of energy and environmental technology, and in particular to a device for promoting hydrate synthesis. Background Art

[0002] Natural gas hydrates are mainly distributed in seabed sediments or permafrost on land. Natural gas compounds are ice-like crystalline substances formed by natural gas and water under low temperature and high pressure conditions. It is a clean and unconventional energy with huge reserves, and is also one of my country's strategic resources.

[0003] Since it is difficult and expensive to drill and sample gas hydrates, the samples currently used for gas hydrate analysis and research are mainly produced by artificial synthesis in the laboratory. In the laboratory, gas hydrates can be synthesized under specific temperature and pressure conditions.

[0004] However, since the synthesis rate of natural gas hydrates is affected by many factors, the synthesis rate of natural gas hydrates synthesized using traditional equipment and process technologies is obviously slow, which seriously delays the progress of the experiment.

[0005] Therefore, it is desirable in the art to provide a device for promoting hydrate synthesis, thereby effectively increasing the synthesis rate of natural gas hydrates and further improving the working efficiency of the experiment. Summary of the invention

[0006] The purpose of the present invention is to provide a device for promoting hydrate synthesis, which can generate a mixed liquid containing micro-nano bubbles through a ventilation component and discharge it into a kettle, thereby effectively promoting the synthesis of natural gas hydrates. At the same time, the device can be widely used in laboratory synthesis processes of various types of gas hydrate samples.

[0007] According to the present invention, there is provided a device for promoting hydrate synthesis, comprising a reactor, wherein the reactor comprises a reactor body defining an inner cavity for accommodating a liquid, a reactor cover, and a ventilation assembly penetrating the wall of the reactor body to connect the inside and outside of the reactor body, wherein the ventilation assembly comprises an air intake unit connected to an external air source, a liquid inlet pipe having one end connected to the air intake unit and the other end connected to the inner cavity, and a discharge unit connected to the inner cavity, wherein the air intake unit is configured to have a variable air pipe cross-sectional area, so that the gas from the external air source can, after entering the air intake unit, draw liquid from the inner cavity through the liquid inlet pipe and mix with the liquid to generate micro-nano bubbles, and then return to the inner cavity through the discharge unit.

[0008] In one embodiment, the air intake unit and the discharge unit are arranged in a colinear manner, and the liquid inlet pipe is connected to a connection portion of the air intake unit and the discharge unit perpendicularly to the air intake unit and the discharge unit.

[0009] In one embodiment, the air intake unit comprises an air intake pipe connected to the external air source, and a throat located in the air intake pipe, wherein the throat extends to the connecting portion.

[0010] In one embodiment, the air inlet pipe includes a first air pipe and a second air pipe, one end of the first air pipe is connected to the external air source, and the other end of the first air pipe is connected to the second air pipe.

[0011] In one embodiment, the second air tube is configured to have a gradually changing diameter, including a first connection portion with a larger diameter and a second connection portion with a smaller diameter, wherein the throat is partially arranged in a portion extending from the second connection portion to the connection portion.

[0012] In one embodiment, the discharge unit comprises a diffusion tube, the internal cross-sectional area of ​​the diffusion tube gradually increases, and an end with a larger area extends into the inner cavity.

[0013] In one embodiment, the throat is configured as a hollow sleeve, one end of which is fixedly connected to the second connecting portion, and the other end of which is opened toward the diffuser.

[0014] In one embodiment, the kettle body includes three ventilation components evenly arranged along the circumference.

[0015] In one embodiment, it is characterized in that a connecting rod is also provided on the upper surface of the kettle cover, and the connecting rod includes an exhaust pipe and a ball valve installed on the exhaust pipe, wherein an exhaust port is provided at one end of the exhaust pipe away from the connecting rod.

[0016] In one embodiment, a sensor component is further provided on the outer surface of the kettle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in detail below with reference to the accompanying drawings, in which:

[0018] Figure 1 The schematic diagram of the structure of the device for promoting hydrate synthesis according to the present invention is shown schematically;

[0019] Figure 2 A transverse cross-sectional view of a kettle body in the device for promoting hydrate synthesis according to the present invention is schematically shown, showing the specific connection relationship between the ventilation assembly and the kettle body.

[0020] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 The schematic diagram of the structure of the device for promoting hydrate synthesis according to the present invention is shown schematically. Figure 2 The schematic diagram shows a transverse cross-sectional view of the kettle in the device for promoting hydrate synthesis according to the present invention, showing the specific connection relationship between the ventilation assembly and the kettle. Figure 1 and Figure 2 As shown, the device 100 for promoting hydrate synthesis according to the present invention mainly includes a reactor 10, wherein the reactor 10 includes a reactor body 12 defining an inner cavity 14 for containing liquid, a reactor cover 11, and a vent assembly 20 penetrating the wall of the reactor body 12 to connect the inside and outside of the reactor body 12. The reactor 10 uses the vent assembly 20 to draw high-pressure gas from an external gas source (such as a high-pressure gas cylinder 90) and discharge the high-pressure gas into the inner cavity 14 of the reactor body 12.

[0023] According to the present invention, the reactor 10 can be made of 304 stainless steel or 316 stainless steel. At the same time, the maximum bearing pressure of the kettle body 12 should be greater than 30Mpa, thereby effectively reducing the potential safety hazards of hydrates in the synthesis process. Moreover, in the reactor 10, the kettle cover 11 and the kettle body 12 are split structures, which is conducive to filling the raw materials into the inner cavity 14 of the kettle body 12 in the early stage of the experiment. In addition, a gasket (not shown) is also provided between the kettle body 12 and the kettle cover 11 to ensure that the reactor 10 has good sealing performance.

[0024] like Figure 1 As shown, the kettle body 12 includes an upper part 121, a middle part 122 and a lower part 123 arranged in sequence. A kettle cover 11 is arranged above the upper part 121 of the kettle body 12, wherein the kettle cover 11 is threadedly connected to the upper part 121 of the kettle body 12 by screws. The middle part 122 of the kettle body 12 is configured as a hollow cylinder, and a sensor component 80 is arranged on its outer surface. The sensor component 80 is connected to a temperature acquisition module not shown. The temperature acquisition module can use a PT100 thermistor with an accuracy of ±0.1°C, which is used to monitor the temperature change in the inner cavity 14 of the kettle body 12. The lower part 123 of the kettle body 12 is installed with a base 13, and the transverse cross-sectional area of ​​the base 13 is larger than the transverse cross-sectional area of ​​the lower part 123 of the kettle body 12, so that the reactor 10 maintains a stable working state during the hydrate synthesis process.

[0025] like Figure 2As shown, in one embodiment of the present invention, the reactor 10 includes three ventilation assemblies 20 evenly arranged along the circumference. One end of the ventilation assemblies 20 inside the reactor body 12 is connected to the inner wall of the reactor body 12. Although three ventilation assemblies 20 evenly arranged along the circumference are provided in the embodiment of the present invention, it is easy for those skilled in the art to understand that other numbers of ventilation assemblies 20 can also be provided on the reactor 10.

[0026] like Figure 1 and Figure 2 As shown, the vent assembly 20 is generally configured in a T-shape and includes three connecting ends. Among them, one lateral end of the T-shape passes through the wall of the kettle body 12 and is connected to the external high-pressure gas cylinder 90, which is used to receive the high-pressure gas in the high-pressure gas cylinder 90. The longitudinal end of the T-shape passes through the wall of the kettle body 12 and is connected to the inner cavity 14, which is used to suck the liquid in the inner cavity 14. The other lateral end of the T-shape is also connected to the inner cavity 14, which is used to discharge the mixed liquid composed of the high-pressure gas and the liquid back into the inner cavity 14 of the kettle body 12.

[0027] Specifically, the ventilation assembly 20 includes an air intake unit 21 connected to an external high-pressure gas cylinder 90, a liquid inlet pipe 22 having one end connected to the air intake unit 21 and the other end connected to the inner cavity 14 of the kettle body 12, and a discharge unit connected to the inner cavity 14 of the kettle body 12. The air intake unit 21 and the discharge unit are arranged in a colinear manner, and the liquid inlet pipe 22 is perpendicular to the air intake unit 21 and the discharge unit and connected to the connection portion of the air intake unit 21 and the discharge unit.

[0028] like Figure 1 As shown, the air intake unit 21 is connected to the high-pressure gas cylinder 90 outside the kettle body 12, and is used to receive the high-pressure gas in the high-pressure gas cylinder 90. The air intake unit 21 includes an air intake pipe 30 and a throat pipe 40 located in the air intake pipe 30. The throat pipe 40 extends to the connection part.

[0029] like Figure 1 As shown, the air inlet pipe 30 includes a first air pipe 31 and a second air pipe 32. As described above, one end of the first air pipe 31 is connected to the external high-pressure gas cylinder 90 for receiving the high-pressure gas in the high-pressure gas cylinder 90; the other end is connected to the second air pipe 32 for guiding the high-pressure gas to flow to the throat 40.

[0030] The second air pipe 32 includes a first connection portion 321 with a larger diameter and a second connection portion 322 with a smaller diameter. In other words, the second air pipe 32 has a gradually decreasing diameter. One end of the first connection portion 321 is connected to the first air pipe 31, and the other end is connected to the second connection portion 322. In addition, the throat 40 is partially disposed in the second connection portion 322.

[0031] like Figure 2As shown, the liquid inlet pipe 22 is embedded in the wall of the kettle body 12 and communicated with the inner cavity 14, so that the liquid in the kettle body 12 can be sucked into the liquid inlet pipe 22 through the action of the air inlet unit 21. The other end of the liquid inlet pipe 22 is arranged at the connection part of the discharge unit and the air inlet unit 21.

[0032] As described above, the air inlet unit 21 has a variable air pipe cross-sectional area through the second air pipe 32 with a gradually decreasing diameter. In this way, as the high-pressure gas goes deeper inward, the cross-sectional area of ​​the air pipe becomes smaller, the flow rate of the high-pressure gas will increase, and the pressure will also decrease accordingly, so a vacuum area is formed at the connection between the liquid inlet pipe 22, the discharge unit and the air inlet unit 21. The vacuum area can enable the liquid inlet pipe 22 to have the ability to absorb liquid, so that the liquid inlet pipe 22 can absorb the liquid in the kettle body 12 into the connection between the discharge unit and the air inlet unit 21.

[0033] In the present invention, Figure 2 As shown, the throat pipe 40 is configured as a hollow cylinder, one end of which is fixedly connected to the second connecting portion 322 , and the other end of which is opened toward the discharge unit.

[0034] When the liquid inlet pipe 22 absorbs the liquid to the connection part of the discharge unit and the air inlet unit 21, a turbulent shear field is formed at the opening of the throat 40 at one end toward the discharge unit due to the collision between the high-speed flowing liquid and the high-pressure gas. At the same time, the eddy shear field breaks up the high-pressure gas passing through the throat 40 to form micro-nano bubbles. At this time, in the discharge unit, the micro-nano bubbles merge with the liquid to form a mixed liquid, which is finally discharged back to the inner cavity 14 of the kettle body 12 through the discharge unit.

[0035] like Figure 2 As shown, the discharge unit includes a diffusion tube 50. The internal cross-sectional area of ​​the diffusion tube 50 gradually increases, and the end with a larger area extends into the inner cavity 14, which is used to discharge the mixed liquid containing micro-nano bubbles back into the inner cavity 14 of the kettle body 12. In this way, the mixed liquid containing micro-nano bubbles enhances the ability of hydrate synthesis in the kettle body 12, so that the synthesis rate is effectively improved.

[0036] According to one embodiment of the present invention, Figure 1 As shown, a connecting rod 60 is also provided on the upper surface of the kettle cover 11 , and the connecting rod 60 includes a pressure gauge 61 for real-time monitoring of the pressure condition in the kettle body 12 .

[0037] According to a preferred embodiment of the present invention, Figure 1As shown, the connecting rod 60 further includes an exhaust pipe 71 and a ball valve 70 mounted on the exhaust pipe 71, wherein an exhaust port 72 is further provided at one end of the exhaust pipe 71 away from the connecting rod 60. As described above, by observing the value of the pressure gauge 61, when the gas pressure in the kettle body 12 needs to be adjusted, the ball valve 70 can be opened to release gas, thereby reducing the gas pressure inside the kettle body 12, thereby effectively ensuring the safety of the hydrate during the synthesis process.

[0038] According to a preferred embodiment of the present invention, depending on the type of hydrate, the high-pressure gas cylinder 90 includes but is not limited to a methane gas cylinder, an ethane gas cylinder, a propane gas cylinder, a carbon dioxide gas cylinder or a mixed gas cylinder of the above substances.

[0039] According to a preferred embodiment of the present invention, Figure 1 As shown, the outside of the reactor 10 is controlled by a water bath to provide a specific temperature environment for the synthesis of hydrates. The circulating medium used in the water bath temperature control includes but is not limited to water, ethanol, ethylene glycol, and automobile antifreeze. In addition, the temperature range required for hydrate synthesis should be controlled between -25°C and +100°C.

[0040] In a specific embodiment according to the present invention, the specific operation of the hydrate synthesis promoting device 100 includes the following steps.

[0041] First, the reactor 10 is subjected to a sealing test.

[0042] 1. After the reactor 10 is sealed, nitrogen is introduced and the pressure in the reactor body 12 should be controlled between 15 MPa and 30 MPa.

[0043] 2. The reactor 10 is left to stand for 24 hours, and the pressure value in the reactor body 12 is monitored in real time by the pressure gauge 61 .

[0044] 3. After 24 hours, if the pressure drop in the kettle body 12 is less than 0.1MPa, the sealing is good; otherwise, if the sealing is not good, it is necessary to conduct sealing tests on various parts of the device, find the problem and repair it, and then conduct sealing tests again until the sealing is good.

[0045] After the sealing test is completed, pure water or an aqueous solution is injected into the reactor 10 according to the needs of the experiment, and the reactor 10 is sealed.

[0046] Afterwards, the ball valve 70 is opened to evacuate the inner cavity 14 of the kettle body 12. After the air in the inner cavity 14 is completely exhausted, the ball valve 7 is closed.

[0047] Afterwards, according to different types of hydrate requirements, a suitable high-pressure gas cylinder 90 is selected, and the high-pressure gas cylinder 90 includes but is not limited to a methane gas cylinder, an ethane gas cylinder, a propane gas cylinder, a carbon dioxide gas cylinder, or a mixed gas cylinder of the above substances. The high-pressure gas cylinder 90 is connected to the ventilation component 20, and the high-pressure gas is introduced into the kettle body 12.

[0048] Afterwards, the reactor 10 is placed in a temperature-controlled water bath to control the temperature, and the temperature of the inner cavity 14 of the reactor body 12 is monitored in real time through a temperature acquisition module (not shown) to ensure that the temperature is always within a specific temperature range.

[0049] Finally, the data during the reaction are recorded in real time, including but not limited to the numerical changes of the temperature and pressure in the kettle body 12 .

[0050] Through the changes in the real-time temperature and pressure values, it is not difficult to see that the mixed liquid containing micro-nano bubbles produced in the device 100 for promoting hydrate synthesis of the present invention does play an important role in the hydrate synthesis process.

[0051] In the present invention, the gas inlet unit 21 receives the high-pressure gas in the high-pressure gas cylinder 90. The high-pressure gas generates micro-nano bubbles through the throat 40, and mixes with the liquid sucked from the inner cavity 14 to the liquid inlet pipe 22 to form a mixed liquid containing micro-nano bubbles. The mixed liquid containing micro-nano bubbles flows back to the inner cavity 14 through the diffusion pipe 50, and is fully mixed and refined with the liquid in the inner cavity 14, so that the rate of hydrate synthesis is significantly improved.

[0052] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the disclosure scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A device (100) for promoting hydrate synthesis, comprising: A reaction kettle (10), comprising a kettle body (12) defining an inner cavity (14) for containing liquid, a kettle cover (11), and a ventilation component (20) penetrating the wall of the kettle body (12) to connect the inside and outside of the kettle body (12), The ventilation assembly (20) comprises an air intake unit (21) connected to an external air source, a liquid intake pipe (22) one end of which is connected to the air intake unit (21) and the other end of which is connected to the inner cavity (14), and a discharge unit connected to the inner cavity (14). The air intake unit (21) is configured to have a variable air pipe cross-sectional area, so that after the gas from the external air source enters the air intake unit (21), it can draw liquid from the inner cavity (14) through the liquid intake pipe (22) and mix with the liquid to generate micro-nano bubbles, and then return to the inner cavity (14) through the discharge unit. The air intake unit (21) and the discharge unit are arranged in a colinear manner, the liquid inlet pipe (22) is perpendicular to the air intake unit (21) and the discharge unit and is connected to the connection portion between the air intake unit (21) and the discharge unit, the air intake unit (21) comprises an air intake pipe (30) connected to the external air source, and a throat pipe (40) located in the air intake pipe (30), wherein the throat pipe (40) extends to the connection portion, the air intake pipe (30) comprises a first air pipe (31) and a second air pipe (32), the first air pipe (31) and the second air pipe (32) One end of an air pipe (31) is connected to the external air source, and the other end is connected to the second air pipe (32), the second air pipe (32) is configured to have a gradually changing diameter, including a first connecting portion (321) with a larger diameter and a second connecting portion (322) with a smaller diameter, wherein the throat (40) extends from the second connecting portion (322) to the connecting portion, and the discharge unit includes a diffuser (50), the internal cross-sectional area of ​​the diffuser (50) gradually increases, wherein the end with a larger area extends into the inner cavity (14).

2. The device for promoting hydrate synthesis according to claim 1, characterized in that: The throat pipe (40) is configured as a hollow sleeve, one end of which is fixedly connected to the second connecting portion (322), and the opening of the other end faces the diffuser pipe (50).

3. The device for promoting hydrate synthesis according to any one of claims 1 to 2, characterized in that: The kettle body (12) comprises three ventilation components (20) uniformly arranged in the circumferential direction.

4. The device for promoting hydrate synthesis according to any one of claims 1 to 2, characterized in that: A connecting rod (60) is also provided on the upper surface of the kettle cover (11), and the connecting rod (60) includes an exhaust pipe (71) and a ball valve (70) installed on the exhaust pipe (71), wherein an exhaust port (72) is provided at one end of the exhaust pipe (71) away from the connecting rod (60).

5. The device for promoting hydrate synthesis according to any one of claims 1 to 2, characterized in that: A sensor component (80) is also arranged on the outer surface of the kettle body (12).

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