A natural gas hydrate reaction device

Abstract

This utility model relates to the technical field of natural gas hydrate production equipment, and discloses a screwdriver-type natural gas hydrate reaction device. This device includes a reaction vessel with a lid fixedly connected to its top end. A mixing assembly is installed inside the reaction vessel. This screwdriver-type natural gas hydrate reaction device generates a large number of fine bubbles through multi-point uniform gas inlet. The bubbles are more dispersed and uniform, resulting in higher natural gas dissolution and mass transfer efficiency. The inner and outer screwdrivers rotate relative to each other, continuously shearing and stirring the liquid between them, improving gas dispersion in water and enhancing gas-liquid mass transfer. Simultaneously, after natural gas enters the liquid through the outlet, it encounters the reverse movement of the inner and outer screwdrivers, causing the bubbles to be continuously stretched and cut, dispersing large bubbles into finer bubbles. This significantly increases the interface area, further facilitating hydrate formation and preventing hydrate aggregation and blockage.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas hydrate production equipment, specifically a winch-type natural gas hydrate reaction device. Background Technology

[0002] Natural gas hydrates are non-stoichiometric cage-like crystalline compounds in which guest molecules are stored in cages of water molecules. Guest molecules of different sizes occupy different cages of water molecules, thus forming different types of hydrates. The natural gas hydrate reaction process refers to the process under low temperature and high pressure conditions in which natural gas molecules enter the cage-like lattice formed by water molecules through hydrogen bonds and are encapsulated to form solid hydrates. Essentially, the formation process is a process of continuous mass transfer and diffusion between gas molecules and water molecules at the gas-liquid interface, and gradual nucleation and growth into stable crystals when thermodynamic conditions are met.

[0003] The existing technology involves adding a certain amount of water to a sealed, high-pressure reactor, then using a compressor or high-pressure gas cylinder to fill the reactor with natural gas. Under high pressure, the natural gas gradually dissolves into the water.

[0004] However, in the above preparation process, natural gas simply enters the reactor space directly from the top of the vessel, rather than being distributed into the depths of the liquid. The natural gas mainly remains above the water surface or near the liquid surface, and the proportion that actually dissolves into the water is limited. The gas-liquid contact area is small, the mass transfer resistance is large, the liquid utilization rate is low, and the hydrate formation rate is slow. In view of this, we propose a winch-type natural gas hydrate reaction device. Utility Model Content

[0005] The purpose of this invention is to provide a winch-type natural gas hydrate reaction device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a winch-type natural gas hydrate reaction device, comprising a reaction vessel, a vessel lid fixedly connected to the top end face of the reaction vessel, and a mixing assembly disposed inside the reaction vessel, the mixing assembly comprising:

[0007] A drive motor, the output end of which is fixedly connected to a rotating shaft, a gear is fixedly connected to the side wall of the rotating shaft, and a belt is provided on the side wall of the rotating shaft;

[0008] The outer cylinder has an air vent on its side wall, and an inner auger is fixedly connected to the outer wall of the outer cylinder.

[0009] An outer winch cage, wherein a toothed ring is fixedly connected to the top end face of the outer winch cage;

[0010] An air intake pipe, the end face of which is fixedly connected to an annular sleeve.

[0011] Preferably, the drive motor is fixedly connected to the outer wall of the reactor, and a pulley is fixedly connected to the side wall of the rotating shaft, and the pulley is connected to a belt drive.

[0012] Preferably, the outer cylinder is rotatably connected to the vessel lid, and a second pulley is fixedly connected to the side wall of the outer cylinder, the second pulley being connected to a belt drive.

[0013] Preferably, the spiral direction of the outer auger is opposite to that of the inner auger, and the gear ring meshes with the gear.

[0014] Preferably, the inner wall of the reactor is fixedly connected with a support ring and a sealing ring. The support ring is movably connected to the bottom of the toothed ring, and the sealing ring is movably connected to the top of the toothed ring, so that the toothed ring is wrapped by the support ring and the sealing ring to prevent gas from leaking to the outside of the reactor through the upper and lower sides of the toothed ring.

[0015] Preferably, the inlet pipe is fixedly connected to the top end face of the vessel lid, the annular sleeve is rotatably connected to the outer wall of the outer cylinder, and the side wall of the outer cylinder is provided with a slot, which is located inside the annular sleeve. Natural gas can enter the outer cylinder through the inlet pipe, the annular sleeve and the slot, and then enter the reactor through the outlet hole.

[0016] Preferably, an inner cylinder is fixedly connected to the inner wall of the outer cylinder, the bottom of the inner cylinder is provided with an opening, and the axis of the inner cylinder coincides with the axis of the outer cylinder.

[0017] Compared with the prior art, this utility model provides a winch-type natural gas hydrate reaction device, which has the following beneficial effects:

[0018] 1. This winch-type natural gas hydrate reactor, through its mixing components, generates a large number of fine bubbles through multi-point uniform gas intake. The bubbles are more dispersed and uniform, resulting in a larger interface area and higher efficiency in natural gas dissolution and mass transfer. The multi-layered gas outlets allow gas to enter from different depths, ensuring that even if a shell is formed locally, gas can still be supplied to other locations, preventing the reaction from being blocked. The inner and outer winches rotate relative to each other, continuously shearing and stirring the liquid between them, improving the dispersion of gas in water and enhancing gas-liquid mass transfer. Simultaneously, after natural gas enters the liquid through the gas outlets, it encounters the reverse movement of the inner and outer winches, causing the bubbles to be continuously stretched and cut, dispersing large bubbles into fine bubbles. This significantly increases the interface area, making it more conducive to hydrate formation and preventing hydrate aggregation and blockage.

[0019] 2. In this auger-type natural gas hydrate reactor, gas enters the liquid from the bottom through the inner cylinder. As the gas bubbles rise in the water, they continuously come into contact with and dissolve in the water, increasing the gas-liquid contact time and path. This allows water from the bottom, middle, and top layers to participate in the reaction, resulting in higher water utilization. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of this utility model;

[0022] Figure 3 This is an exploded view of the hybrid component of this utility model;

[0023] Figure 4 This is a schematic diagram of the outer cylinder structure of this utility model;

[0024] Figure 5 This utility model Figure 4 Schematic diagram of the structure of region A in the middle.

[0025] In the diagram: 1. Reactor; 2. Reactor lid; 3. Mixing assembly; 301. Drive motor; 302. Rotary shaft; 303. Gear; 304. Belt; 305. Outer cylinder; 306. Vent; 307. Inner auger; 308. Outer auger; 309. Gear ring; 310. Inlet pipe; 311. Annular sleeve; 312. Groove; 4. Support ring; 5. Sealing ring; 6. Inner cylinder. Detailed Implementation

[0026] like Figures 1-5 As shown, this utility model provides a technical solution: a winch-type natural gas hydrate reaction device, including a reaction vessel 1, a vessel cover 2 fixedly connected to the top end face of the reaction vessel 1, and a mixing component 3 arranged inside the reaction vessel 1. The mixing component 3 includes a drive motor 301, a rotating shaft 302, a gear 303, a belt 304, an outer cylinder 305, a gas outlet 306, an inner winch 307, an outer winch 308, a toothed ring 309, a gas inlet pipe 310, an annular sleeve 311, and a slot 312.

[0027] In one embodiment of this utility model, a drive motor 301 is fixedly connected to the outer wall of the reaction vessel 1. A rotating shaft 302 is fixedly connected to the output end of the drive motor 301. A gear 303 is fixedly connected to the side wall of the rotating shaft 302. A belt 304 is provided on the side wall of the rotating shaft 302. A pulley is fixedly connected to the side wall of the rotating shaft 302. The pulley is connected to the belt 304 for transmission.

[0028] The outer cylinder 305 is rotatably connected to the lid 2. The side wall of the outer cylinder 305 is provided with an air vent 306. The outer wall of the outer cylinder 305 is fixedly connected to an inner auger 307. The side wall of the outer cylinder 305 is fixedly connected to a pulley 2, which is connected to a belt 304 for transmission.

[0029] A toothed ring 309 is fixedly connected to the top end face of the outer auger 308. The spiral direction of the outer auger 308 is opposite to that of the inner auger 307. The toothed ring 309 meshes with the gear 303. A support ring 4 and a sealing ring 5 are fixedly connected to the inner wall of the reactor 1. The support ring 4 is movably connected to the bottom of the toothed ring 309, and the sealing ring 5 is movably connected to the top of the toothed ring 309, so that the toothed ring 309 is wrapped by the support ring 4 and the sealing ring 5, preventing gas from leaking to the outside of the reactor 1 through the upper and lower sides of the toothed ring 309.

[0030] The inlet pipe 310 is fixedly connected to the top end face of the vessel cover 2. An annular sleeve 311 is fixedly connected to the end face of the inlet pipe 310. The annular sleeve 311 is rotatably connected to the outer wall of the outer cylinder 305. A slot 312 is opened on the side wall of the outer cylinder 305. The slot 312 is located inside the annular sleeve 311. Natural gas can enter the outer cylinder 305 through the inlet pipe 310, the annular sleeve 311 and the slot 312, and then enter the reactor 1 through the outlet 306.

[0031] Natural gas enters the outer cylinder 305 through the inlet pipe 310, the annular sleeve 311, and the slot 312, and then enters the reactor 1 through the outlet 306, allowing natural gas to directly enter the liquid. The outlets 306 are evenly spaced in the longitudinal direction, allowing gas to enter at different depths in the water. This multi-point uniform gas intake generates a large number of fine bubbles. The more dispersed and uniform the bubbles are, the larger the interface area, and the higher the efficiency of natural gas dissolution and mass transfer. If gas is only introduced at a single point, especially at the liquid surface, a hydrate shell is easily formed at the gas-liquid interface, hindering further mass transfer. The multi-layer outlets 306 allow gas to enter from different depths. Even if a shell is formed locally, gas can still be supplied to other locations, and the reaction will not be blocked.

[0032] The drive motor 301 drives the rotating shaft 302 and gear 303 to rotate in the forward direction. Through the transmission of belt 304, the outer cylinder 305 and inner auger 307 rotate in the forward direction. The gear 303 drives the gear ring 309 and outer auger 308 to rotate in the reverse direction. The outer diameter of the inner auger 307 is equal to the inner diameter of the outer auger 308. The inner and outer augers rotate relative to each other, and the liquid is continuously sheared and stirred between them, which improves the dispersion of gas in water and enhances gas-liquid mass transfer. At the same time, after the natural gas enters the liquid through the gas outlet 306, it encounters the reverse movement of the inner and outer augers 308. The bubbles are continuously stretched and cut, and large bubbles are dispersed into small bubbles. The interface area is greatly increased, which is more conducive to hydrate formation and improves and avoids hydrate agglomeration and blockage.

[0033] In addition, an inner cylinder 6 is fixedly connected to the inner wall of the outer cylinder 305. The bottom of the inner cylinder 6 has an opening, and the axis of the inner cylinder 6 coincides with the axis of the outer cylinder 305. This allows the natural gas to first flow downward to the bottom of the inner cylinder 6, and then flow upward in the opposite direction between the outer cylinder 305 and the inner cylinder 6. Only then can it flow into the reactor 1 from bottom to top through the gas outlet 306. The gas enters the liquid from the bottom, and the bubbles continuously contact and dissolve with the water as they rise, increasing the gas-liquid contact time and path. In this way, the bottom, middle, and upper layers of water can all participate in the reaction, resulting in higher water utilization. The same volume of water can generate more hydrates, thus improving the conversion rate.

[0034] In this invention, during use, natural gas enters the outer cylinder 305 through the inlet pipe 310, annular sleeve 311, and slot 312, and then enters the reaction vessel 1 through the outlet 306, allowing the natural gas to directly enter the liquid. The outlets 306 are evenly spaced longitudinally, allowing gas to enter at different depths in the water. This multi-point, uniform gas intake generates a large number of fine bubbles, improving the dissolution and mass transfer efficiency of the natural gas. The drive motor 301 drives the rotating shaft 302 and gear 303 to rotate forward, and the outer cylinder 305 is driven by the belt 304. The cylinder 305 and the inner auger 307 rotate in the forward direction, while the gear 303 drives the gear ring 309 and the outer auger 308 to rotate in the opposite direction. The outer diameter of the inner auger 307 is equal to the inner diameter of the outer auger 308. The inner and outer augers rotate relative to each other, and the liquid is continuously sheared and stirred between them, which improves the dispersion of gas in water and enhances gas-liquid mass transfer. At the same time, after the natural gas enters the liquid through the gas outlet 306, it encounters the reverse movement of the inner and outer augers 308, and the bubbles are continuously stretched and cut, and large bubbles are dispersed into small bubbles, which is more conducive to the formation of hydrates.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A winch-type natural gas hydrate reaction device, comprising a reaction vessel (1), wherein a vessel cover (2) is fixedly connected to the top end face of the reaction vessel (1), characterized in that: The reactor (1) is equipped with a mixing component (3), which includes: A drive motor (301) is provided with a rotating shaft (302) fixedly connected to its output end. A gear (303) is fixedly connected to the side wall of the rotating shaft (302), and a belt (304) is provided on the side wall of the rotating shaft (302). An outer cylinder (305) has an air vent (306) on its side wall, and an inner auger (307) is fixedly connected to the outer wall of the outer cylinder (305). An outer winch (308) is provided, with a toothed ring (309) fixedly connected to the top end face of the outer winch (308). An air intake pipe (310) is provided, and an annular sleeve (311) is fixedly connected to the end face of the air intake pipe (310).

2. The winch-type natural gas hydrate reaction device according to claim 1, characterized in that: The drive motor (301) is fixedly connected to the outer wall of the reactor (1), and a pulley is fixedly connected to the side wall of the rotating shaft (302). The pulley is connected to the belt (304) for transmission.

3. The winch-type natural gas hydrate reaction device according to claim 1, characterized in that: The outer cylinder (305) is rotatably connected to the lid (2), and a pulley is fixedly connected to the side wall of the outer cylinder (305). The pulley is connected to the belt (304) for transmission.

4. The winch-type natural gas hydrate reaction device according to claim 1, characterized in that: The spiral direction of the outer auger (308) is opposite to that of the inner auger (307), and the toothed ring (309) meshes with the gear (303).

5. A winch-type natural gas hydrate reaction device according to claim 1, characterized in that: The inner wall of the reactor (1) is fixedly connected with a support ring (4) and a sealing ring (5). The support ring (4) is movably connected to the bottom of the toothed ring (309), and the sealing ring (5) is movably connected to the top of the toothed ring (309).

6. The winch-type natural gas hydrate reactor according to claim 1, characterized in that: The air inlet pipe (310) is fixedly connected to the top end face of the lid (2), the annular sleeve (311) is rotatably connected to the outer wall of the outer cylinder (305), and the side wall of the outer cylinder (305) is provided with a groove (312), which is located inside the annular sleeve (311).

7. A winch-type natural gas hydrate reaction device according to claim 1, characterized in that: The inner wall of the outer cylinder (305) is fixedly connected to the inner cylinder (6), the bottom of the inner cylinder (6) is provided with an opening, and the axis of the inner cylinder (6) coincides with the axis of the outer cylinder (305).

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