Hydrate solid-state synthesis device and hydrate synthesis storage integrated device

Abstract

A hydrate solid synthesis device and hydrate synthesis storage integrated device belong to the field of natural gas storage and transportation. In order to solve the problem that the natural gas supply needs to be interrupted when the existing single-chamber hydrate solid synthesis device is cleaned, the key point is a hydrate synthesis system for synthesizing natural gas into hydrate. The hydrate synthesis system includes a shell, a hydrate synthesis chamber is formed by the shell, the shell of the hydrate synthesis chamber is provided with a discharge port, a scraper is arranged in the hydrate synthesis chamber, the scraper is configured to move in the hydrate synthesis chamber, the inner shell of the hydrate synthesis chamber is scraped by the moving scraper, and the hydrate in the chamber space passed by the scraper is pushed to the discharge port by the movement of the scraper. The effect is that the natural gas is solid-state treated, the hydrate generated in the hydrate synthesis chamber is fully cleaned out of the chamber by the movement of the scraper.

Description

Technical Field

[0001] This invention belongs to the field of natural gas storage and transportation, specifically relating to a solid-state hydrate synthesis device and an integrated hydrate synthesis and storage device. Background Technology

[0002] The hydrate method for solidifying and storing natural gas refers to the use of gas hydrate technology to synthesize solid natural gas hydrate from natural gas and water under low temperature and high pressure, which is then stored and transported. Due to its advantages such as high theoretical gas storage density (1 volume of natural gas hydrate can store 164 volumes of natural gas), mild storage conditions (atmospheric pressure, -5℃ to -15℃), simple equipment, and low storage and transportation costs, this method is considered a highly promising commercial natural gas storage and transportation approach. The hydrate synthesis and storage / transport equipment determines the efficiency of hydrate synthesis and storage / transport, and is crucial for the hydrate method of storing and transporting deep-sea natural gas. Existing single-chamber hydrate synthesis and granulation systems require that the chamber be opened only after synthesis is complete to allow the hydrate to be cleaned into the granulator. This necessitates intermittent natural gas supply, and hydrate synthesis and granulation cannot be performed simultaneously, affecting the efficiency of both processes. Summary of the Invention

[0003] To address the issue of interrupted natural gas supply during hydrate removal in existing single-chamber solid-state hydrate synthesis devices, a further improvement is needed to enable simultaneous and continuous operation of hydrate synthesis and granulation equipment, thereby enhancing solidification efficiency.

[0004] In a first aspect, the hydrate solid-state synthesis apparatus according to some embodiments of this application includes

[0005] A hydrate synthesis system for synthesizing hydrates from natural gas, the hydrate synthesis system comprising a shell forming a hydrate synthesis chamber, the shell of the hydrate synthesis chamber being provided with a discharge port;

[0006] A gas supply system is connected to the hydrate synthesis chamber and supplies the natural gas to the hydrate synthesis chamber.

[0007] A liquid spraying system is connected to the hydrate synthesis chamber and supplies coolant to the hydrate synthesis chamber;

[0008] The granulation system is connected to the outlet of the hydrate synthesis chamber and granulates the hydrate output from the outlet.

[0009] The hydrate synthesis chamber is equipped with a scraper, which is configured to move within the hydrate synthesis chamber. The moving scraper scrapes the inner shell of the hydrate synthesis chamber, pushing the hydrate in the chamber space that the scraper passes through to the discharge port by the movement of the scraper.

[0010] According to some embodiments of the hydrate solid synthesis apparatus of this application, the inner shell of the hydrate synthesis chamber is provided with a sliding groove, and the scraper is provided with a sliding part that cooperates with the sliding groove. The scraper moves and scrapes the inner shell of the hydrate synthesis chamber by sliding in the sliding groove through the sliding part.

[0011] According to some embodiments of the hydrate solid synthesis apparatus of this application, the scraper divides the hydrate synthesis chamber into a first chamber and a second chamber in a first state, which are relatively sealed and isolated, at the initial position of the hydrate synthesis chamber. The first chamber in the first state includes a first discharge port, and a first gravity-sensing opening switch door is installed at the first discharge port. The first gravity-sensing opening switch door includes an open state and a closed state. The second chamber in the first state includes a second discharge port, and a second gravity-sensing opening switch door is installed at the second discharge port. The second gravity-sensing opening switch door includes an open state and a closed state.

[0012] The scraper is configured to move between the first discharge port and the second discharge port. As the scraper moves, the two chambers separated by the scraper can vary the chamber space of the first chamber in the first state and the chamber space of the second chamber in the first state. In the variable chamber space state, the two chambers separated by the scraper include the first chamber in the second state and the second chamber in the second state.

[0013] The granulation system includes a first granulator and a second granulator, wherein the first granulator is connected to the first discharge port and the second granulator is connected to the second discharge port;

[0014] In the second state, the first chamber stops synthesizing the hydrate. The scraper moves from the second outlet toward the first outlet, pushing the hydrate in the chamber space it passes through to the first outlet. The first gravity-sensored opening switch is in the open state, and the first granulator receives the hydrate output from the first outlet. The first gravity-sensored opening switch is in the closed state. At this time, the second chamber in the second state synthesizes the hydrate, and the second gravity-sensored opening switch is in the closed state.

[0015] In the second state, the second chamber stops synthesizing the hydrate. The scraper moves from the first outlet toward the second outlet, pushing the hydrate in the chamber space through which the scraper passes to the second outlet. The second gravity-sensored opening switch is set to the open state, and the second granulator receives the hydrate output from the second outlet. The second gravity-sensored opening switch is set to the closed state. At this time, the first chamber in the second state synthesizes the hydrate, and the first gravity-sensored opening switch is set to the closed state.

[0016] According to some embodiments of the hydrate solid synthesis apparatus of this application, the scraper is in the initial position of the hydrate synthesis chamber. The second chamber in the first state stops synthesizing the hydrate, the second gravity-sensing opening switch is in the open state, the scraper moves from the initial position toward the second discharge port, the second chamber in the first state transitions to the second chamber in the second state, the scraper pushes the hydrate in the chamber space of the first chamber in the first state through the scraper to the second discharge port by the movement of the scraper, the second gravity-sensing opening switch is in the open state, and the second granulator receives the hydrate output from the second discharge port, the second gravity-sensing opening switch is in the closed state; at this time, the first chamber in the first state transitions to the first chamber in the second state, the first chamber synthesizes the hydrate during this period, the first gravity-sensing opening switch is in the closed state.

[0017] According to some embodiments of the hydrate solid synthesis apparatus of this application, the spraying system includes a first nozzle and a second nozzle, the first nozzle being installed in the chamber space of the first chamber in the first state, and the second nozzle being installed in the chamber space of the second chamber in the first state; the gas supply system includes a first gas supply pipeline, the interface of the first gas supply pipeline being disposed in the shell of the first chamber in the first state, and the interface of the second gas supply pipeline being disposed in the shell of the second chamber in the first state.

[0018] According to some embodiments of the hydrate solid synthesis apparatus of this application, the granulation system further includes a first screw conveyor, a second screw conveyor, a first discharge port connected to the first screw conveyor, the first screw conveyor connected to the first granulator, a second discharge port connected to the second screw conveyor, and the second screw conveyor connected to the second granulator.

[0019] According to some embodiments of the hydrate solid synthesis apparatus of this application, the gravity-sensing opening switch door includes a first gravity-sensing opening switch door and a second gravity-sensing opening switch door.

[0020] The hydrate solid synthesis apparatus according to some embodiments of this application further includes

[0021] A permanent magnet is disposed on the scraper;

[0022] A sealing baffle includes a first sealing baffle and a second sealing baffle. The first sealing baffle and the second sealing baffle have openings for hydrates to pass through. The first sealing baffle is disposed at the front end of the first discharge port and is located between the first discharge port and the scraper. The second sealing baffle is disposed at the front end of the second discharge port and is located between the second discharge port and the scraper.

[0023] The magnetic field generating unit includes a coil, which controllably generates a magnetic field to attract or repel the permanent magnet of the scraper with magnetic force in different directions. The magnetic field generating unit includes a first magnetic field generating unit and a second magnetic field generating unit. The first magnetic field generating unit is disposed at the rear end of the first discharge port, so that the first discharge port is located between the first magnetic field generating unit and the first sealing baffle. The second magnetic field generating unit is disposed at the rear end of the second discharge port, so that the second discharge port is located between the second magnetic field generating unit and the second sealing baffle.

[0024] Wherein, the scraper moves from the second discharge port toward the first discharge port, the first magnetic field generating part generates an attractive force on the permanent magnet of the scraper, and the second magnetic field generating part generates a repulsive force on the permanent magnet of the scraper; the scraper moves from the first discharge port toward the second discharge port, the first magnetic field generating part generates a repulsive force on the permanent magnet of the scraper, and the second magnetic field generating part generates an attractive force on the permanent magnet of the scraper.

[0025] The scraper abuts against the first sealing baffle, and the first sealing baffle blocks the vent hole of the scraper. The first gravity-sensing opening switch is set to the open state, and the hydrate in the first chamber is released from the first chamber. The first gravity-sensing opening switch is set to the closed state. The scraper abuts against the second sealing baffle, and the second sealing baffle blocks the vent hole of the scraper. The second gravity-sensing opening switch is set to the open state, and the hydrate in the second chamber is released from the second chamber. The second gravity-sensing opening switch is set to the closed state.

[0026] According to some embodiments of the hydrate solid synthesis apparatus of this application, the top of the inner shell is provided with a first liner plate covering the top of the inner shell and having a certain thickness. The first liner plate is provided with a top sliding groove. The top sliding groove includes a first groove opening, a first receiving portion, and a limiting portion. The first groove opening is a groove with a certain thickness provided in the first liner plate. The first receiving portion is a groove extending from the groove opening to both sides of the first liner plate. The limiting portion is a groove extending from the first receiving portion in the thickness direction of the first liner plate towards the groove opening. The limiting portion does not penetrate the first liner plate in the thickness direction of the first liner plate. The groove width of the first receiving portion is greater than the groove width of the first groove opening.

[0027] The top of the scraper is provided with a first sliding part, which includes a first groove fitting part, a first receiving fitting part, and a limiting groove fitting part. The first groove fitting part is fitted with the first groove fitting part, the first receiving part is fitted with the first receiving fitting part, and the limiting part is fitted with the limiting groove fitting part. The width of the first receiving fitting part is greater than the width of the first groove fitting part. The limiting groove fitting part is provided on at least one side of the width direction of the first receiving fitting part, and the limiting fitting part extends toward the top plate of the scraper.

[0028] The left side of the inner shell is provided with a second liner plate covering the left side of the inner shell and having a certain thickness. The second liner plate is provided with the left side sliding groove. The left side sliding groove includes a second groove opening and a second receiving part. The second groove opening is a groove with a certain thickness provided in the second liner plate. The second receiving part is a groove extending from the groove opening to both sides of the second liner plate. The groove width of the second receiving part is greater than the groove width of the second groove opening.

[0029] The scraper is provided with a second sliding part on the left side. The second sliding part includes a second groove fitting part and a second receiving fitting part. The second groove fitting part is fitted with the second groove fitting part, and the second receiving part is fitted with the second receiving fitting part. The width of the second receiving fitting part is greater than the width of the second groove fitting part.

[0030] The right side of the inner shell is provided with a third liner plate covering the right side of the inner shell and having a certain thickness. The third liner plate is provided with a right side sliding groove. The right side sliding groove includes a third groove opening and a third receiving part. The third groove opening is a groove with a certain thickness provided on the third liner plate. The third receiving part is a groove extending from the groove opening to both sides of the third liner plate. The groove width of the third receiving part is greater than the groove width of the third groove opening.

[0031] The scraper is provided with a third sliding part on the right side. The third sliding part includes a third groove fitting part and a third receiving fitting part. The third groove fitting part is provided to fit the third groove fitting part, and the third receiving part is provided to fit the third receiving fitting part. The width of the third receiving fitting part is greater than the width of the third groove fitting part.

[0032] The top edge of the scraper abuts against the first liner, the left side edge of the scraper abuts against the second liner, the right side edge of the scraper abuts against the third liner, and the top edge of the scraper abuts against the bottom plate of the hydrate synthesis chamber.

[0033] In a second aspect, the hydrate synthesis and storage integrated apparatus according to some embodiments of this application is characterized in that it includes a hydrate solid synthesis apparatus as described in any one of the claims and a hydrate storage tank, the hydrate storage tank being used to store solid hydrates.

[0034] Beneficial effects: In the first aspect, this invention utilizes the reciprocating motion of the scraper and the cooperation between the granulator and the hydrate storage tank to achieve continuous and efficient synthesis, granulation and storage of raw natural gas hydrates. This not only significantly improves the synthesis efficiency of raw natural gas hydrates, but also fully utilizes the "self-protection effect" of hydrates to prevent hydrate decomposition, greatly saving refrigeration energy consumption during the storage and transportation of natural gas hydrates, which is conducive to promoting the commercial exploitation of deep-sea natural gas.

[0035] In a second aspect, the invention uses a scraper to separate two variable-space chambers, moving and scraping between the first and second discharge ports. This not only cleans but also thoroughly cleans the hydrates in the hydrate synthesis chamber. Furthermore, due to the formation of variable spaces, the cleaning process can extend beyond one chamber in a single cleaning operation. The variable spaces also allow the generation space to gradually increase during hydrate formation, accommodating more natural gas. Consequently, the aqueous solution, preferably in spray form, can react more fully with the natural gas.

[0036] In a third aspect, the present invention involves a scraper that moves within a chamber to divide the chamber space into two chambers in a variable state. This allows for the simultaneous formation of hydrates in the second chamber while the first chamber is being scraped to remove hydrates, ensuring an uninterrupted natural gas supply. Thus, when the scraper begins to move towards the second chamber to remove hydrates, the first chamber is in a hydrate formation state, and the corresponding first granulator is operational. During the hydrate formation process in the first chamber, the first granulator is also in the granulation process, while the second chamber is being scraped to remove hydrates. In the next reciprocating phase, the first granulator is either in the process of granulation or has just completed granulation, allowing the next batch of hydrates to be supplied to the first granulator, ensuring a substantially continuous granulation process and full utilization of the granulator.

[0037] In a fourth aspect, the sealing baffle of this invention can block the vent of the scraper after contacting it. Therefore, even if the sealing cover of one chamber is open at this time, it will not affect the supply of natural gas to the other chamber for synthesis. That is, the scraper reaches and abuts against the sealing baffle of the first chamber, before which the outlet of the first chamber is in a sealed state. At this time, the sealing cover of the first chamber is opened, and the hydrate in the first chamber enters the corresponding granulator. Subsequently, the sealing cover of one chamber is closed, and the scraper moves to the other chamber. The scraper thereby changes and interchanges the states of the two chambers. The above scheme, in conjunction with the scraper, enables the two chambers of this invention to have variable space and variable state, and ensures that the change is without unacceptable disturbance. By changing and interchangeing the states of the two chambers through the scraper's movement direction, the device of this invention can always be supplied with natural gas during the state changes and interchanges of the two chambers with variable space, and the hydrate synthesis and granulation can be carried out at the same time, so as to make full use of the equipment.

[0038] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0039] Figure 1 A schematic diagram of a method for solidifying, storing, and transporting deep-sea raw natural gas using the hydrate method;

[0040] Figure 2 This is a schematic diagram of the integrated hydrate synthesis and storage device.

[0041] Figure 3 Here are schematic diagrams of the interior of the hydrate synthesis chamber: (a) schematic diagram of the hydrate synthesis chamber, and (b) schematic diagram of the internal structure of the hydrate synthesis chamber.

[0042] Figure 4 A top view showing the positions of the scraper and gravity-sensored opening / closing door in the hydrate synthesis chamber;

[0043] Figure 5 Here are schematic diagrams of the scraper: (a) schematic diagram of the scraper structure, and (b) side view of the scraper.

[0044] Figure 6 This is a schematic diagram of the sealing baffle structure;

[0045] Figure 7 This is a schematic diagram of the electromagnetic chamber. Detailed Implementation

[0046] The embodiments of this application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0047] Hydrate-based solidification storage and transportation of natural gas is a method that utilizes gas hydrate technology to synthesize solid natural gas hydrates from natural gas and aqueous solutions under low temperature and high pressure before storage and transportation. Due to its advantages such as high theoretical gas storage density (1 volume of natural gas hydrate can store 164 volumes of natural gas), mild storage conditions (atmospheric pressure, -5℃ to -15℃), simple equipment, and low storage and transportation costs, this method is a highly promising commercial application for natural gas storage and transportation. Conventional hydrate-based solidification storage and transportation of natural gas typically includes four processes: raw natural gas purification, natural gas hydrate synthesis, safe storage and transportation of hydrates, and decomposition gas production. However, the raw natural gas purification process based on offshore floating gas production platforms results in numerous and complex equipment on the offshore production platform, leading to a sharp increase in extraction difficulty and costs. Furthermore, the complexity of the equipment may reduce the stability of the extraction platform.

[0048] Based on this, in one embodiment, according to Figure 1 As shown, the present invention describes a method for solidifying and transporting deep-sea natural gas using the hydrate method. The equipment used in implementing the method includes an offshore gas production platform 1, a solidified natural gas transport vessel 2, a natural gas hydrate storage tank 3, a hydrate gasification tower 4, a natural gas purification device 5, a natural gas storage tank 6, an impurity gas recovery tank 7, and a natural gas transport vehicle 8.

[0049] In a specific example, the method for solidifying and transporting deep-sea raw natural gas using the hydrate method of the present invention utilizes natural gas hydrate technology to directly synthesize raw natural gas hydrate (containing methane, ethane, propane, carbon dioxide, sulfur dioxide, hydrogen sulfide, etc.) produced from deep-sea gas fields under low-temperature and high-pressure conditions. The hydrate is then granulated into spherical hydrates, transported at low temperatures by solidified natural gas transport vessels to onshore, where it is further decomposed, recovered, purified, and redistributed. The specific steps of the method for solidifying and transporting deep-sea natural gas using the hydrate method include:

[0050] S101. Direct Synthesis and Storage of Solid Natural Gas Hydrate from Raw Natural Gas: Raw natural gas extracted from the offshore gas production platform 1 of the deep-sea gas field is directly injected into the integrated raw natural gas hydrate synthesis and storage device inside the solidified natural gas transport vessel 2. The pressure in the hydrate synthesis chamber of this device is maintained at 10 MPa and the temperature at -10℃, allowing the raw natural gas hydrate to be rapidly synthesized and granulated into spherical hydrates with a diameter of 10-20 mm, which are then stored in hydrate storage tanks 23-1 and 23-2. The raw natural gas contains more than 75% methane and less than 25% other hydrocarbon gases and acidic gases. The aqueous solution is a compound solution of 5.56 mol% tetrahydrofuran and 100 ppm sodium dodecyl sulfate. The raw natural gas is a mixture of methane as the main gas and small amounts of ethane, propane, carbon dioxide, sulfur dioxide, and hydrogen sulfide.

[0051] S102. Cryogenic storage and transportation of raw natural gas hydrates by solidified natural gas transport vessel: Long-distance storage and transportation of raw natural gas hydrate spheres is carried out using solidified natural gas transport vessel 2. During the storage and transportation process, the pressure inside the hydrate storage silo is maintained at 1 standard atmosphere, and the internal temperature of hydrate storage silos 23-1 and 23-2 is maintained at -10℃ using the storage refrigeration system.

[0052] S103. Transfer of raw natural gas hydrate to onshore hydrate storage: After the solidified natural gas storage and transportation vessel 2 arrives at the onshore natural gas hydrate storage and transportation station, the natural gas hydrate balls in hydrate storage silos 23-1 and 23-2 are transferred to hydrate storage tank 3.

[0053] S104. Efficient decomposition of raw natural gas hydrate: The raw natural gas hydrate stored in the natural gas hydrate storage tank 3 is transported at constant pressure to the hydrate gasification tower 4. The pressure in the gasification tower 4 is maintained at 1 standard atmosphere and the temperature is 50°C to rapidly decompose the raw natural gas hydrate. The raw natural gas obtained after decomposition is injected into the natural gas purification device 5. The 5.56 mol% tetrahydrofuran and 100 ppm sodium dodecyl sulfate compound solution obtained from the decomposition is injected again into the solution storage tank 27 in the hydrate transport ship 2 for reuse.

[0054] S105. Purification and Storage of Raw Natural Gas: The raw natural gas in purification device 5 undergoes "three-stage removal" (dehydration, hydrocarbon removal, and acid gas removal) to remove impurity gases (ethane, propane, carbon dioxide, sulfur dioxide, hydrogen sulfide, etc.) to obtain standard-compliant natural gas. The purified standard natural gas is then injected into natural gas storage tank 6 for storage, and the separated impurity gases are injected into impurity gas recovery tank 7 for recovery. The impurity gases are ethane, propane, carbon dioxide, hydrogen sulfide, etc.

[0055] S106. Secondary transportation and distribution of natural gas: Natural gas in natural gas storage tank 6 is transported and secondary distributed through natural gas storage and transportation vehicle 8 according to user needs.

[0056] According to the proposed method, compared to existing technologies that first purify (three-stage dehydrogenation) extracted natural gas on the extraction platform before synthesizing solid hydrates, the present invention directly synthesizes raw natural gas hydrates from deep-sea raw natural gas (containing methane, ethane, propane, carbon dioxide, sulfur dioxide, hydrogen sulfide, etc.) without first undergoing the three-stage purification process (dehydration, hydrocarbon removal, and removal of acidic gases). Granulation, storage, transportation, decomposition and recovery, purification, and secondary distribution are then carried out. Compared to existing technologies, this invention has the advantages of two aspects: First, the raw natural gas does not require complex purification treatment before storage and transportation; the purification process is conducted onshore, greatly simplifying extraction equipment and reducing extraction costs. Second, the ethane, propane, and acidic gases carbon dioxide and hydrogen sulfide contained in the synthesized raw natural gas promote the synthesis of natural gas hydrates, improving the temperature and pressure conditions for hydrate synthesis and accelerating the synthesis rate. This reduces the refrigeration and pressurization energy consumption required for natural gas hydrate synthesis compared to existing hydrate-based solidification and storage methods, thus lowering the storage and transportation costs of deep-sea natural gas.

[0057] In a specific instance, according to Figure 2 As shown, the solidified natural gas transport vessel 2 integrates a hydrate synthesis and storage device. Specifically, the hydrate synthesis and storage device includes a solid hydrate synthesis unit and a storage system. The solid hydrate synthesis unit enables the direct synthesis of solid hydrates on the transport vessel, and the storage system enables the storage of natural gas in solid hydrate form under demand conditions, which is then transported by the solidified natural gas transport vessel 2. Specifically, the integrated hydrate synthesis and storage device includes a gas supply system, a solution spraying system, a hydrate synthesis system, a granulation system, and an industrial control computer 32.

[0058] The gas supply system includes a shut-off valve 9, a natural gas buffer tank 10, a safety valve 11, a pressure gauge 12, a back pressure valve 13, a first solenoid valve 14-1, a second solenoid valve 14-2, and pipelines. It is used to pre-cool the raw natural gas produced from deep-sea natural gas wells and deliver it at constant pressure to the hydrate synthesis chamber.

[0059] The solution spraying system includes a solution storage tank 27, a liquid booster pump 28, a high-pressure flow controller 29, a first sprayer 16-1, a second sprayer 16-2, and a solenoid valve 30. It is used to spray a constant flow rate of aqueous solution into the hydrate synthesis chamber.

[0060] The hydrate synthesis system includes a hydrate synthesis chamber 15, a first pressure sensor 18-1, a second pressure sensor 18-2, a scraper 17, a gravity-sensing opening switch door, a first hydrate conduit 20-1, and a second hydrate conduit 20-2. It is used to continuously synthesize raw natural gas hydrate from raw natural gas and an aqueous solution, wherein the sealing method between the scraper 17 and the hydrate synthesis chamber 15 is a dynamic seal.

[0061] The granulation system includes a first screw conveyor 21-1, a second screw conveyor 21-2, a first granulator 22-1, and a second granulator 22-2. The seal between the scraper 17 and the hydrate synthesis chamber 15 is a dynamic seal. The refrigeration system includes a jacketed constant temperature chamber 24, a temperature sensor 31, and a temperature control circulation device 26. It is used to transport raw natural gas hydrates and store spherical hydrates with uniform granulation diameter in the hydrate storage tank.

[0062] The hydrate storage chamber 23 includes a refrigeration system, which comprises a jacketed constant temperature chamber 24, a temperature sensor 31, and a temperature control circulation device 26. It is used to provide a constant low-temperature environment for hydrate synthesis and granulation. The jacketed constant temperature chamber can be temperature-set, and the hydrate storage chamber is used to store raw natural gas hydrate pellets.

[0063] The industrial control computer is used to control the opening and closing of the solenoid valve, the opening and closing of the sprayer, and the moving direction and speed of the scraper. It provides instructions to the high-pressure flow controller and receives signals from the pressure sensor and temperature sensor to monitor the temperature inside the jacketed constant temperature chamber and the pressure in the hydrate synthesis system.

[0064] In a preferred embodiment, according to Figure 2 As shown, the solid hydrate synthesis apparatus includes a hydrate synthesis system, a gas supply system, a liquid spraying system, and a granulation system.

[0065] The hydrate synthesis system is used to synthesize hydrates from natural gas. The hydrate synthesis system includes a shell, which forms a hydrate synthesis chamber 15. The shell of the hydrate synthesis chamber 15 is provided with a discharge port.

[0066] The gas supply system is connected to the hydrate synthesis chamber 15 and supplies the natural gas to the hydrate synthesis chamber 15.

[0067] The spray system is connected to the hydrate synthesis chamber 15 and supplies coolant to the hydrate synthesis chamber 15.

[0068] The granulation system is connected to the discharge port of the hydrate synthesis chamber 15 and granulates the hydrate output from the discharge port.

[0069] The hydrate synthesis chamber 15 is provided with a scraper 17, which is configured to move within the hydrate synthesis chamber 15. The moving scraper 17 scrapes the inner shell of the hydrate synthesis chamber 15, and pushes the hydrate in the chamber space through which the scraper 17 passes to the discharge port by the movement of the scraper 17.

[0070] According to the aforementioned scheme, the present invention achieves solid-state treatment of natural gas, and by moving a scraper, thoroughly removes the hydrates generated in the hydrate synthesis chamber 15 from the chamber.

[0071] In one specific implementation, according to Figure 3 a and Figure 3 As shown in Figure b, the inner shell of the hydrate synthesis chamber 15 is provided with a sliding groove, and the scraper 17 is provided with a sliding part that cooperates with the sliding groove. Figure 5 As shown in Figure a, the scraper 17 moves and scrapes the inner shell of the hydrate synthesis chamber 15 by sliding in the sliding groove via the sliding part. According to the above scheme, the present invention realizes the movement of the scraper 17 by the sliding part that cooperates with the sliding groove.

[0072] In one specific implementation, according to Figure 3 a and Figure 4 As shown, the scraper 17 divides the hydrate synthesis chamber 15 at its initial position into a first chamber and a second chamber in a first state, which are relatively sealed and isolated. The first chamber in the first state includes a first discharge port, which is equipped with a first gravity-sensing opening switch door, which has an open state and a closed state. The second chamber in the first state includes a second discharge port, which is equipped with a second gravity-sensing opening switch door, which also has an open state and a closed state.

[0073] according to Figure 2 As shown, the scraper 17 is configured to move between the first discharge port and the second discharge port. The two chambers separated by the scraper 17 are such that the chamber space of the first chamber in the first state and the chamber space of the second chamber in the first state are variable as the scraper 17 moves. In the variable chamber space state, the two chambers separated by the scraper 17 include the first chamber in the second state and the second chamber in the second state.

[0074] The granulation system includes a first granulator 22-1 and a second granulator 22-2. The first granulator 22-1 is connected to the first discharge port, and the second granulator 22-2 is connected to the second discharge port.

[0075] In the second state, the first chamber stops synthesizing the hydrate. The scraper 17 moves from the second outlet toward the first outlet, pushing the hydrate in the chamber space it passes through to the first outlet. The first gravity-sensor opening switch is in the open state, and the first granulator 22-1 receives the hydrate output from the first outlet. The first gravity-sensor opening switch is in the closed state. At this time, the second chamber in the second state synthesizes the hydrate, and the second gravity-sensor opening switch is in the closed state.

[0076] In the second state, the second chamber stops synthesizing the hydrate. The scraper 17 moves from the first outlet toward the second outlet, pushing the hydrate in the chamber space it passes through to the second outlet. The second gravity-sensored opening switch is in the open state, and the second granulator 22-2 receives the hydrate output from the second outlet. The second gravity-sensored opening switch is in the closed state. At this time, the first chamber in the second state synthesizes the hydrate, and the first gravity-sensored opening switch is in the closed state.

[0077] According to the aforementioned scheme, existing single-chamber hydrate synthesis and granulation systems require that the chamber be opened only after synthesis is complete to allow the hydrate to be cleaned into the granulator. This necessitates intermittent natural gas supply, and hydrate synthesis and granulation cannot be performed simultaneously, impacting their efficiency. This invention utilizes a scraper to separate two variable-space chambers, moving and scraping between the first and second discharge ports. This not only cleans but thoroughly removes the hydrate from the hydrate synthesis chamber. Furthermore, due to the variable space, the cleaning stroke in a single cleaning process can exceed that of a single chamber. The variable space also allows for a gradual increase in the generation space during hydrate formation, accommodating more natural gas. This, in turn, allows the preferred spray-form aqueous solution to react more fully with the natural gas. Furthermore, the scraper for hydrate removal moves within the chamber, dividing the chamber space into two chambers with variable states. This allows for simultaneous hydrate formation in the second chamber while the first chamber is being scraped to remove hydrate, ensuring an uninterrupted natural gas supply. Thus, when the scraper 17 begins moving towards the second chamber to remove hydrate, the first chamber is in a hydrate formation state, and the corresponding first granulator is operational. During the hydrate formation process in the first chamber, the first granulator is also in granulation mode, while the second chamber is being scraped to remove hydrate. In the next reciprocating phase, the first granulator is either in the process of granulation or has just completed granulation, allowing the next batch of hydrate to be supplied to the first granulator, ensuring a essentially continuous granulation process and full utilization of the granulator.

[0078] In one specific implementation, according to Figure 2 As shown, at the initial position of the hydrate synthesis chamber 15, the scraper 17 stops synthesizing the hydrate in the second chamber of the first state. The scraper 17 moves from the initial position toward the second discharge port, and the second chamber of the first state transitions to the second chamber of the second state. The scraper 17 pushes the hydrate in the chamber space of the first chamber of the first state through which the scraper 17 passes to the second discharge port. The second gravity-sensor opening switch is set to the open state, and the second granulator 22-2 receives the hydrate output from the second discharge port. The second gravity-sensor opening switch is set to the closed state. At this time, the first chamber of the first state transitions to the first chamber of the second state, and the first chamber synthesizes the hydrate during this period. The first gravity-sensor opening switch is set to the closed state. According to the above scheme, it describes the structure and operation of the device of the present invention starting from the initial position.

[0079] In one specific implementation, according to Figure 2 As shown, the spraying system includes a first nozzle and a second nozzle. The first nozzle is installed in the chamber space of the first chamber in the first state, and the second nozzle is installed in the chamber space of the second chamber in the first state. The air supply system includes a first air supply line, the first air supply line interface being disposed in the housing of the first chamber in the first state, and the second air supply line interface being disposed in the housing of the second chamber in the first state.

[0080] In one specific embodiment, the granulation system further includes a first screw conveyor, a second screw conveyor 21-2, a first discharge port connected to the first screw conveyor, the first screw conveyor connected to the first granulator 22-1, a second discharge port connected to the second screw conveyor 21-2, and the second screw conveyor 21-2 connected to the second granulator 22-2.

[0081] In one specific implementation, according to Figure 2 As shown, the gravity-sensing opening switch door includes a first gravity-sensing opening switch door 19-1 and a second gravity-sensing opening switch door 19-2.

[0082] In one specific embodiment, the hydrate solid synthesis apparatus further includes

[0083] Permanent magnet, according to Figure 5 As shown in b, it is set on the scraper 17, according to Figure 5 As shown in figure a, the upper part of the scraper 17 includes at least one venting through hole. According to the design, the venting through hole can prevent the gas in one side chamber from being compressed during movement.

[0084] The sealing baffle includes a first sealing baffle and a second sealing baffle. The first sealing baffle and the second sealing baffle have openings for hydrates to pass through. The first sealing baffle is disposed at the front end of the first discharge port and is located between the first discharge port and the scraper 17. The second sealing baffle is disposed at the front end of the second discharge port and is located between the second discharge port and the scraper 17.

[0085] according to Figure 7 As shown, the magnetic field generating unit includes a coil, which controllably generates a magnetic field to attract or repel the permanent magnet of the scraper 17 with magnetic force in different directions. The magnetic field generating unit includes a first magnetic field generating unit and a second magnetic field generating unit. The first magnetic field generating unit is disposed at the rear end of the first discharge port, so that the first discharge port is located between the first magnetic field generating unit and the first sealing baffle. The second magnetic field generating unit is disposed at the rear end of the second discharge port, so that the second discharge port is located between the second magnetic field generating unit and the second sealing baffle.

[0086] In this configuration, the scraper 17 moves from the second discharge port toward the first discharge port. The first magnetic field generating part generates an attractive force on the permanent magnet of the scraper 17, while the second magnetic field generating part generates a repulsive force on the permanent magnet of the scraper 17.

[0087] The scraper 17 abuts against the first sealing baffle, with the first sealing baffle blocking the ventilation hole of the scraper 17. The first gravity-sensored opening switch is in the open state, and hydrates in the first chamber are released from the first chamber. The first gravity-sensored opening switch is then in the closed state. The scraper 17 abuts against the second sealing baffle, with the second sealing baffle blocking the ventilation hole of the scraper 17. The second gravity-sensored opening switch is in the open state, and hydrates in the second chamber are released from the second chamber. The second gravity-sensored opening switch is then in the closed state.

[0088] According to the aforementioned scheme, the sealing baffle can block the vent of the scraper after contacting it. Therefore, even if the gravity-sensored opening door of one chamber opens at this time, it will not affect the supply of natural gas to the other chamber for synthesis. That is, the scraper reaches and abuts against the sealing baffle of the first chamber. Before this, the outlet of the first chamber is in a sealed state due to the gravity-sensored opening door. At this time, if the gravity-sensored opening door of the first chamber opens, the hydrate from the first chamber enters the corresponding granulator. Subsequently, if the gravity-sensored opening door of one chamber closes, the scraper will move to the other chamber. The scraper thereby changes and interchanges the states of the two chambers. The above scheme, in conjunction with the scraper, enables the two chambers to have variable space and variable state, and ensures that this change is free from unacceptable disturbances. According to the above scheme, the present invention changes and interchanges the states of the two chambers by moving the scraper, so that the device of the present invention can always be supplied with natural gas during the state changes and interchanges of the two spatially variable chambers, and the hydrate synthesis and granulation can be carried out at the same time, so as to make full use of the equipment.

[0089] In one specific implementation, according to Figure 3 b and Figure 5 As shown in Figure a, the top of the inner shell is provided with a first liner plate covering the top of the inner shell and having a certain thickness. The first liner plate is provided with a top sliding groove. The top sliding groove includes a first groove opening, a first receiving portion, and a limiting portion. The first groove opening is a groove with a certain thickness provided in the first liner plate. The first receiving portion is a groove extending from the groove opening to both sides of the first liner plate. The limiting portion is a groove extending from the first receiving portion in the thickness direction of the first liner plate towards the groove opening. The limiting portion does not penetrate the first liner plate in the thickness direction of the first liner plate. The groove width of the first receiving portion is greater than the groove width of the first groove opening.

[0090] The scraper 17 has a first sliding part at its top. The first sliding part includes a first groove fitting part, a first receiving fitting part, and a limiting groove fitting part. The first groove fitting part is fitted with the first groove fitting part, the first receiving part is fitted with the first receiving fitting part, and the limiting part is fitted with the limiting groove fitting part. The width of the first receiving fitting part is greater than the width of the first groove fitting part. The limiting groove fitting part is provided on at least one side of the width direction of the first receiving fitting part. The limiting fitting part extends toward the top plate of the scraper 17.

[0091] according to Figure 3 b and Figure 5As shown in Figure a, a second liner with a certain thickness is provided on the left side of the inner shell, covering the left side of the inner shell. The second liner is provided with a sliding groove on the left side, which includes a second groove opening and a second receiving portion. The second groove opening is a groove with a certain thickness provided on the second liner. The second receiving portion is a slot from the groove opening to both sides of the second liner. The slot width of the second receiving portion is greater than the slot width of the second groove opening.

[0092] The scraper 17 has a second sliding part on its left side. The second sliding part includes a second groove fitting part and a second receiving fitting part. The second groove fitting part is fitted with the second groove fitting part, and the second receiving part is fitted with the second receiving fitting part. The width of the second receiving fitting part is greater than the width of the second groove fitting part.

[0093] according to Figure 3 b and Figure 5 As shown in Figure a, a third liner with a certain thickness is provided on the right side of the inner shell, covering the right side of the inner shell. The third liner is provided with a sliding groove on the right side, which includes a third groove opening and a third receiving portion. The third groove opening is a groove with a certain thickness provided on the third liner. The third receiving portion is a slot extending from the groove opening to both sides of the third liner. The slot width of the third receiving portion is greater than the slot width of the third groove opening.

[0094] The scraper 17 is provided with a third sliding part on its right side. The third sliding part includes a third groove fitting part and a third receiving fitting part. The third groove fitting part is provided to fit the third groove fitting part, and the third receiving part is provided to fit the third receiving fitting part. The width of the third receiving fitting part is greater than the width of the third groove fitting part.

[0095] The top edge of the scraper 17 abuts against the first liner, the left side edge of the scraper 17 abuts against the second liner, the right side edge of the scraper 17 abuts against the third liner, and the top edge of the scraper 17 abuts against the bottom plate of the hydrate synthesis chamber 15.

[0096] The integrated hydrate synthesis and storage device enables the direct and continuous synthesis and storage of raw natural gas hydrates from offshore gas production platforms in deep-sea gas fields. The integrated hydrate synthesis and storage method for this process includes the following steps:

[0097] Step 1: Connect the gas pipeline of the offshore gas production platform 1 to the natural gas buffer tank 10 via a pipeline. Open the high-pressure shut-off valve 9 to allow raw natural gas to enter the natural gas buffer tank 10. After the raw natural gas in the natural gas buffer tank 10 is pre-cooled to the temperature set by the jacketed constant temperature chamber 24, open the back pressure valve 13 and the first solenoid valve 14-1 and the second solenoid valve 14-2 to allow the natural gas to enter the left and right chambers of the hydrate synthesis chamber 15. The natural gas buffer tank 10 is arranged inside the jacketed constant temperature chamber 24 and is equipped with a safety valve 11 and a pressure gauge 12. The opening and closing of the first solenoid valve 14-1 and the second solenoid valve 14-2 are programmed by the industrial control computer 32.

[0098] Step 2: The pre-cooled aqueous solution in the solution storage tank 27 is pressurized by the liquid booster pump 28 and flows to the liquid flow controller 29. After the solenoid valve 30 is opened, the aqueous solution flows to the first sprayer 16-1 and the second sprayer 16-2 at the flow rate set by the flow controller 29. After passing through the first sprayer 16-1 and the second sprayer 16-2, the aqueous solution is sprayed into the hydrate synthesis chamber 15 in a mist form. Then, the temperature and pressure conditions in the hydrate synthesis chamber 15 are maintained at -20℃ and 10MPa to allow the raw natural gas to quickly synthesize raw natural gas hydrate and accumulate at the bottom of the chamber. The solution storage tank 27 is located at the bottom of the jacketed constant temperature box 24, and the hydrate synthesis chamber 15 is located inside the jacketed constant temperature box 24.

[0099] Step 3: Start the DC generator 35 and turn on the multi-function switch 36 to allow current to flow through the coils 38 inside the first electromagnetic chamber 34-1 and the second electromagnetic chamber 34-2, generating a magnetic field. The magnetic fields generated by the first electromagnetic chamber 34-1 and the second electromagnetic chamber 34-2 create a magnetic force in the same direction on the scraper 17, which is equipped with a permanent magnet inside. This causes the scraper 17, located in the middle of the hydrate synthesis chamber, to move to the left at a constant speed. During the leftward movement of the scraper, the hydrate accumulated in the left chamber is scraped off and moves to the left with the scraper, achieving the purpose of removing the hydrate. At the same time as the scraper 17 moves to the left, the first sprayer 16-1 and the first air intake solenoid valve 14-1 in the left chamber are closed, and the hydrate synthesis process in the left chamber is paused. Simultaneously, during the leftward movement of the scraper, the gas in the left chamber is compressed and flows into the right chamber of the scraper 17 through the air holes opened on the scraper 17. After the scraper 17 moves to the left first sealing baffle 33-1 and the first gravity sensor... At the opening switch 19-1, the scraper 17 and the first sealing baffle 33-1 are tightly fitted under the action of magnetic force, so that the chamber on the right side of the scraper 17 forms a sealed space. At this time, the first gravity-sensing opening switch 19-1 automatically opens under the gravity of the hydrate. The original natural gas hydrate falls into the first screw conveyor 21-1 through the first hydrate conduit 20-1. After the hydrate has fallen, the first gravity-sensing opening switch 19-1 automatically closes. At this time, the multi-function switch 36 switches and changes the current direction under the program control of the industrial control computer 32, so that the current direction flowing through the coils inside the first electromagnetic chamber 34-1 and the second electromagnetic chamber 34-2 changes, forming a magnetic force to the right with the scraper. Under the action of this magnetic force, the scraper 17 begins to move to the right. When the scraper 17 moves to the middle position of the hydrate chamber, the first sprayer 16-1 and the first solenoid valve 14-1 in the left chamber open, and the left chamber continues to synthesize hydrate.Under the influence of the magnetic field, scraper 17 continues to move to the right after passing the middle position, scraping away the hydrate accumulated at the bottom of the right chamber. At this time, the second sprayer 16-2 and the second solenoid valve 14-2 in the right chamber close, suspending the hydrate synthesis in the right chamber. During the rightward movement of the scraper, the gas in the right chamber is compressed and flows into the left chamber of scraper 17 through the air holes opened on scraper 17. Scraper 17 continues to move until it reaches the second sealing baffle 33-2 and the second gravity-sensing opening switch 19-2 in the right chamber. Similarly, baffle 17 and the second sealing baffle 33-2... 2. Under the influence of magnetic force, the two parts fit tightly together, forming a sealed space in the left chamber of baffle 17. Simultaneously, the second gravity-sensing opening switch 19-2 opens under the gravity of the hydrate. The original natural gas hydrate falls through the second hydrate conduit 20-2 to the second screw conveyor 21-2. After the hydrate has fallen completely, the second gravity-sensing opening switch 19-2 automatically closes. Then, the automatic switch 36 switches between the first electromagnetic chamber 34-1 and the second electromagnetic chamber 34-2 under the program control of the industrial control computer 32. The direction of the current in coil 38 creates a magnetic field force pointing to the left, causing scraper 17 to move to the left under the action of this magnetic field force. When the scraper moves to the middle position, the second sprayer 16-2 and the second solenoid valve 14-2 of the air intake electric valve in the right chamber open, and hydrate begins to form in the right chamber. Afterward, scraper 17 continues to move to the left under the action of the magnetic field force and repeats the above steps to scrape away the hydrate in the left and right chambers. Under the action of alternating electromagnetic forces, scraper 17 achieves reciprocating motion in the left and right chambers and works in conjunction with the first sprayer 16- 1. The continuous synthesis of hydrates is achieved by opening and closing the second sprayer 16-2 and the first and second solenoid valves 14-1 and 14-2. After entering the screw conveyor 22, the hydrates are transported to the first granulator 22-1 and the second granulator 22-2 to form hydrate balls with a diameter of 10-20 mm. Then, they enter the first hydrate storage silo 23-1 and the second hydrate storage silo 23-2 through the third hydrate conduit 20-3, the fourth hydrate conduit 20-4, the third gravity-sensing opening switch 19-3, and the fourth gravity-sensing opening switch 19-4. The scraper 17 is connected to the hydrate synthesis chamber through slide rails at the upper and side ends. The movement direction of the scraper 17 and the opening and closing of the first sprayer 16-1, the second sprayer 16-2, the air inlet valve 14-1, and the second solenoid valve 14-2 are all controlled by the industrial control computer 32 program. The first and second gravity-sensor opening switch 19-1 and the second gravity-sensor opening switch 19-2 are respectively arranged at the left and right ends of the bottom of the hydrate synthesis chamber. The multi-functional switch 36 is controlled by an industrial control computer program and can realize the opening and closing of the circuit and the switching of the current flow direction. The permanent magnet 37 is cuboid and is installed inside the scraper 17.

[0100] According to the scheme, in step three, the hydrate synthesis chamber 15 is maintained in a low-temperature and high-pressure environment for rapid hydrate synthesis. When hydrate is generated and accumulated in the left chamber, the scraper 17 located in the middle of the hydrate synthesis chamber moves to the left at a constant speed and scrapes away the hydrate in the left chamber. As the scraper 17 moves to the left, the first sprayer 16-1 in the left chamber closes, and the first solenoid valve 14-1 controlling the left chamber closes, stopping hydrate synthesis in the left chamber. When the scraper 17 moves to the left first gravity-sensing opening switch 19-1, the first gravity-sensing opening switch 19-1 opens under the gravity of the hydrate, and the hydrate falls through the first hydrate conduit 20-1 to the first screw conveyor 21-1. After the hydrate has fallen completely, the first gravity-sensing opening switch 19-1 closes, and the scraper 17 moves to the right. When the scraper 17 moves to the middle position of the hydrate chamber, the first sprayer 16-1 in the left chamber opens, the first solenoid valve 14-1 opens, and hydrate synthesis begins in the left chamber. As scraper 17 continues to move right after passing the middle position, scraping the hydrate in the right chamber, the second sprayer 16-2 in the right chamber closes, and the second solenoid valve 14-2 closes, stopping hydrate synthesis in the right chamber. When scraper 17 moves to the second gravity-sensored opening switch 19-2 in the right chamber, the second gravity-sensored opening switch 19-2 opens under the action of gravity of the hydrate, and the hydrate falls through the second hydrate conduit 20-2 to the second screw conveyor 21-2. After the hydrate has fallen completely, the second gravity-sensored opening switch 19-2 closes, and scraper 17 begins to move left. When the scraper moves left to the middle position, the second sprayer 16-2 in the right chamber opens, and the second electric valve 14-2 opens, allowing hydrate synthesis to begin in the right chamber. Scraper 17 continues to move left, repeating the above steps to continuously scrape the hydrate. The scraper 17 reciprocates at a certain speed, coordinating with the opening and closing of the first sprayer 16-1, the second sprayer 16-2, and the first solenoid valve 14-1 and the second solenoid valve 14-2 to achieve continuous synthesis of hydrates. After entering the screw conveyor 22, the hydrates are transported to the first granulator 22-1 and the second granulator 22-2 to form hydrate spheres with a diameter of 10-20 mm. Then, they pass through the third hydrate conduit, the fourth hydrate conduit, and the third gravity-sensor opening / closing gate 19-3 and the fourth gravity-sensor opening / closing gate 19-4 into the first hydrate storage silo 23-1 and the second hydrate storage silo 23-2. The direction and speed of movement of the scraper 17, as well as the opening and closing of the first sprayer 16-1, the second sprayer 16-2, and the first and second air inlet valves 14-1 and 14-2, are all controlled by the industrial control computer 32 program.

[0101] Step 4: The hydrates entering the screw conveyor are transported to the granulation device and granulated into hydrate balls of the same diameter. These granules then pass through a hydrate conduit and a gravity-sensored opening door into a hydrate storage silo for low-temperature storage. The diameter of the hydrate balls is 10-20 mm. In a preferred embodiment, the gravity-sensored opening door is equipped with a gravity sensor, and the door includes an electromagnetic lock and a spring-loaded hinge.

[0102] Step 5: Maintain the pressure of the hydrate storage chamber at 1 standard atmosphere, and use the storage chamber refrigeration system 25 to maintain the temperature inside the hydrate storage chamber 23 at -15℃ to store the spherical hydrates inside the hydrate storage chamber. According to the above scheme, the storage chamber refrigeration system (25) is used to maintain the hydrate storage chamber (23) in a low-temperature environment to prevent hydrate decomposition. According to the above scheme, the temperature of the jacketed constant temperature box 24 is set to -20 to -10℃, the pressure of the hydrate synthesis chamber is 7 to 10 MPa, and the aqueous solution in the solution storage tank is a compound solution of 5.56 mol% tetrahydrofuran and 100 ppm sodium dodecyl sulfate. The aqueous solution obtained after decomposition is re-injected into the hydrate storage tank for secondary use.

[0103] The integrated hydrate synthesis and storage device of the present invention utilizes the reciprocating motion of scrapers and the interaction between sprayers, opening and closing mechanisms, granulators, and hydrate storage silos to achieve continuous and efficient synthesis, granulation, and storage of raw natural gas hydrates. This not only significantly improves the synthesis efficiency of raw natural gas hydrates but also fully leverages the "self-protection effect" of hydrates to prevent hydrate decomposition, greatly saving refrigeration energy consumption during the storage and transportation of natural gas hydrates, which is conducive to promoting the commercial exploitation of deep-sea natural gas.

[0104] According to the present invention, a method for solidifying and storing deep-sea raw natural gas using the hydrate method is employed to directly and continuously synthesize natural gas hydrates from raw natural gas (containing gases such as methane, ethane, propane, carbon dioxide, sulfur dioxide, and hydrogen sulfide) produced in deep-sea gas fields without undergoing "three-stage" purification. The hydrates are then granulated, stored, transported, decomposed, recovered, and purified before secondary distribution. This method solves the problems of numerous equipment on offshore production platforms, complex processes, high extraction difficulty, and poor economic efficiency faced by conventional hydrate-based solidification and storage methods. It significantly simplifies extraction equipment, improves the efficiency of raw natural gas hydrate synthesis, and reduces energy consumption and costs in synthesis, storage, and transportation. Specifically, the integrated hydrate synthesis and storage device utilizes the reciprocating motion of scrapers, the opening and closing of sprayers and air intake solenoid valves, and the coordination between the granulator and the hydrate storage tank to achieve continuous and efficient synthesis, granulation, and storage of raw natural gas hydrates, significantly improving hydrate synthesis efficiency. By using a granulator to form hydrate pellets from raw natural gas hydrates for storage, the self-protective effect of the hydrates can be fully utilized to prevent their decomposition, significantly reducing refrigeration energy consumption during the storage and transportation of natural gas hydrates. This provides a favorable guarantee for the storage and transportation of deep-sea natural gas using the hydrate method. This invention can reduce the difficulty of deep-sea natural gas extraction and storage, and is conducive to promoting the commercial extraction of deep-sea natural gas.

[0105] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0107] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0108] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0109] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one" refers to one or more; "at least one of A and B," similar to "A and / or B," describes the relationship between related objects, indicating that three relationships can exist. For example, at least one of A and B can represent: A existing alone, A and B existing simultaneously, or B existing alone.

[0110] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0111] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydrate solid-state synthesis apparatus, comprising: The hydrate solid synthesis device includes a hydrate synthesis system for synthesizing hydrates from natural gas. The hydrate synthesis system includes a shell forming a hydrate synthesis chamber, and the shell of the hydrate synthesis chamber is provided with a discharge port. A gas supply system is connected to the hydrate synthesis chamber and supplies the natural gas to the hydrate synthesis chamber. A liquid spraying system is connected to the hydrate synthesis chamber and supplies coolant to the hydrate synthesis chamber; The granulation system is connected to the outlet of the hydrate synthesis chamber and granulates the hydrate output from the outlet. The hydrate synthesis chamber is equipped with a scraper, which is configured to move within the hydrate synthesis chamber. The moving scraper scrapes the inner shell of the hydrate synthesis chamber, pushing the hydrate in the chamber space that the scraper passes through to the discharge port. The inner shell of the hydrate synthesis chamber of the hydrate solid synthesis device is provided with a sliding groove, and the scraper is provided with a sliding part that cooperates with the sliding groove. The scraper moves and scrapes the inner shell of the hydrate synthesis chamber by sliding in the sliding groove through the sliding part. The scraper of the hydrate solid synthesis device divides the hydrate synthesis chamber into a first chamber and a second chamber in a first state, which are relatively sealed and isolated, at the initial position of the hydrate synthesis chamber. The first chamber in the first state includes a first discharge port, and a first gravity-sensing opening switch door is installed at the first discharge port. The first gravity-sensing opening switch door has an open state and a closed state. The second chamber in the first state includes a second discharge port, and a second gravity-sensing opening switch door is installed at the second discharge port. The second gravity-sensing opening switch door has an open state and a closed state. The scraper is configured to move between the first discharge port and the second discharge port. The two chambers separated by the scraper can vary in the first state and the second state as the scraper moves. In the variable chamber state, the two chambers separated by the scraper include the first state in the second state and the second state in the second state. The granulation system includes a first granulator and a second granulator, wherein the first granulator is connected to the first discharge port and the second granulator is connected to the second discharge port; In the second state, the first chamber stops synthesizing the hydrate. The scraper moves from the second outlet toward the first outlet, pushing the hydrate in the chamber space it passes through to the first outlet. The first gravity-sensored opening switch is set to the open state, and the first granulator receives the hydrate output from the first outlet. The first gravity-sensored opening switch is set to the closed state. At this time, the second chamber in the second state synthesizes the hydrate, and the second gravity-sensored opening switch is set to the closed state. In the second state, the second chamber stops synthesizing the hydrate. The scraper moves from the first outlet toward the second outlet, pushing the hydrate in the chamber space it passes through to the second outlet. The second gravity-sensored opening switch is set to the open state, and the second granulator receives the hydrate output from the second outlet. The second gravity-sensored opening switch is set to the closed state. At this time, the first chamber in the second state synthesizes the hydrate, and the first gravity-sensored opening switch is set to the closed state. The liquid spraying system of the hydrate solid synthesis device includes a first nozzle and a second nozzle. The first nozzle is installed in the chamber space of the first chamber in the first state, and the second nozzle is installed in the chamber space of the second chamber in the first state. The gas supply system includes a first gas supply pipeline. The interface of the first gas supply pipeline is disposed in the shell of the first chamber in the first state, and the interface of the second gas supply pipeline is disposed in the shell of the second chamber in the first state. The hydrate solid synthesis device also includes a permanent magnet, which is disposed on the scraper. A sealing baffle includes a first sealing baffle and a second sealing baffle. The first sealing baffle and the second sealing baffle have openings for hydrates to pass through. The first sealing baffle is disposed at the front end of the first discharge port and is located between the first discharge port and the scraper. The second sealing baffle is disposed at the front end of the second discharge port and is located between the second discharge port and the scraper. The magnetic field generating unit includes a coil, which controllably generates a magnetic field to attract or repel the permanent magnet of the scraper with magnetic force in different directions. The magnetic field generating unit includes a first magnetic field generating unit and a second magnetic field generating unit. The first magnetic field generating unit is disposed at the rear end of the first discharge port, so that the first discharge port is located between the first magnetic field generating unit and the first sealing baffle. The second magnetic field generating unit is disposed at the rear end of the second discharge port, so that the second discharge port is located between the second magnetic field generating unit and the second sealing baffle. Wherein, the scraper moves from the second discharge port toward the first discharge port, the first magnetic field generating part generates an attractive force on the permanent magnet of the scraper, and the second magnetic field generating part generates a repulsive force on the permanent magnet of the scraper; the scraper moves from the first discharge port toward the second discharge port, the first magnetic field generating part generates a repulsive force on the permanent magnet of the scraper, and the second magnetic field generating part generates an attractive force on the permanent magnet of the scraper. The scraper abuts against the first sealing baffle, which blocks the vent hole of the scraper. The first gravity-sensing opening switch is set to the open state, and the hydrate in the first chamber is released from the first chamber. The first gravity-sensing opening switch is then set to the closed state. The scraper abuts against the second sealing baffle, which blocks the vent hole of the scraper. The second gravity-sensing opening switch is set to the open state, and the hydrate in the second chamber is released from the second chamber. The second gravity-sensing opening switch is then set to the closed state.

2. The hydrate solid-state synthesis apparatus according to claim 1, characterized in that, The scraper of the hydrate solid synthesis device is initially positioned in the hydrate synthesis chamber. The second chamber in the first state stops synthesizing the hydrate, and the second gravity-sensored opening switch is in the open state. The scraper moves from the initial position toward the second discharge port, and the second chamber in the first state transitions to the second chamber in the second state. The scraper pushes the hydrate in the chamber space of the first chamber in the first state to the second discharge port. The second gravity-sensored opening switch is in the open state, and the second granulator receives the hydrate output from the second discharge port. The second gravity-sensored opening switch is then in the closed state. At this time, the first chamber in the first state transitions to the first chamber in the second state, and the first chamber synthesizes the hydrate during this period. The first gravity-sensored opening switch is then in the closed state.

3. The hydrate solid-state synthesis apparatus according to claim 1, characterized in that, The granulation system of the hydrate solid synthesis device further includes a first screw conveyor, a second screw conveyor, a first discharge port connected to the first screw conveyor, the first screw conveyor connected to the first granulator, a second discharge port connected to the second screw conveyor, and the second screw conveyor connected to the second granulator.

4. The hydrate solid-state synthesis apparatus according to claim 1, characterized in that, The gravity-sensing opening switch door of the hydrate solid synthesis device includes a first gravity-sensing opening switch door and a second gravity-sensing opening switch door.

5. The hydrate solid-state synthesis apparatus according to claim 1, characterized in that, The inner shell of the hydrate solid synthesis device is provided with a first liner plate covering the top of the inner shell and having a certain thickness. The first liner plate is provided with a top sliding groove. The top sliding groove includes a first groove opening, a first receiving part, and a limiting part. The first groove opening is a groove with a certain thickness provided in the first liner plate. The first receiving part is a groove extending from the groove opening to both sides of the first liner plate. The limiting part is a groove extending from the first receiving part in the thickness direction of the first liner plate towards the groove opening. The limiting part does not penetrate the first liner plate in the thickness direction of the first liner plate. The groove width of the first receiving part is greater than the groove width of the first groove opening. The top of the scraper is provided with a first sliding part, which includes a first groove fitting part, a first receiving fitting part, and a limiting groove fitting part. The first groove fitting part is provided with the first groove fitting part, the first receiving part is provided with the first receiving fitting part, and the limiting part is provided with the limiting groove fitting part. The width of the first receiving fitting part is greater than that of the first groove fitting part. The limiting groove fitting part is provided on at least one side of the width direction of the first receiving fitting part, and the limiting groove fitting part extends toward the top plate of the scraper. The left side of the inner shell is provided with a second liner plate covering the left side of the inner shell and having a certain thickness. The second liner plate is provided with a left side sliding groove. The left side sliding groove includes a second groove opening and a second receiving part. The second groove opening is a groove with a certain thickness provided in the second liner plate. The second receiving part is a groove extending from the groove opening to both sides of the second liner plate. The groove width of the second receiving part is greater than the groove width of the second groove opening. The scraper is provided with a second sliding part on the left side. The second sliding part includes a second groove fitting part and a second receiving fitting part. The second groove fitting part is fitted with the second groove fitting part, and the second receiving part is fitted with the second receiving fitting part. The width of the second receiving fitting part is greater than the width of the second groove fitting part. The right side of the inner shell is provided with a third liner plate covering the right side of the inner shell and having a certain thickness. The third liner plate is provided with a right side sliding groove. The right side sliding groove includes a third groove opening and a third receiving part. The third groove opening is a groove with a certain thickness provided on the third liner plate. The third receiving part is a groove extending from the groove opening to both sides of the third liner plate. The groove width of the third receiving part is greater than the groove width of the third groove opening. The scraper is provided with a third sliding part on the right side. The third sliding part includes a third groove fitting part and a third receiving fitting part. The third groove fitting part is provided to fit the third groove fitting part, and the third receiving part is provided to fit the third receiving fitting part. The width of the third receiving fitting part is greater than the width of the third groove fitting part. The top edge of the scraper abuts against the first liner, the left side edge of the scraper abuts against the second liner, the right side edge of the scraper abuts against the third liner, and the top edge of the scraper abuts against the bottom plate of the hydrate synthesis chamber.

6. An integrated device for hydrate synthesis and storage, characterized in that, The invention includes the solid hydrate synthesis apparatus and hydrate storage tank as described in any one of claims 1-5, wherein the hydrate storage tank is used to store solid hydrates.

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