Natural gas cooling and liquefying device

Abstract

The natural gas cooling and liquefying device comprises an outer tank, a heat preservation layer is arranged on the outer wall of the outer tank and can protect the temperature of liquid nitrogen, a partition plate is fixedly connected to the position, close to the bottom, of the circumferential surface of the inner wall of the outer tank, an inner tank is fixedly arranged in the middle of the partition plate in a sleeved mode, and a round hole matched with the inner tank is formed in the middle of the partition plate. A liquid discharging pipe is fixedly connected to the middle of the bottom of the inner tank, the bottom of the liquid discharging pipe penetrates through the outer tank and is provided with a second control valve, a round hole matched with the liquid discharging pipe is formed in the bottom of the outer tank, a rotating pipe is rotationally connected to the bottom of the outer side of the inner tank, the rotating pipe and the liquid discharging pipe are coaxial, and the outer wall of the rotating pipe is fixedly sleeved with a rotating plate and a first synchronous wheel. According to the utility model, the replacement frequency of the motor is reduced, the equipment maintenance cost is reduced, the downtime is shortened, the tank body does not need to be disassembled, the operation is simple and convenient, impurities and condensates on the inner tank wall can be removed in time, the interior of the device is kept clean, and the natural gas liquefaction purity and quality are ensured.

Description

Technical Field

[0001] This utility model relates to the field of liquefaction equipment technology, and in particular to a natural gas cooling liquefaction device. Background Technology

[0002] In the global energy structure, natural gas, as a clean and efficient energy source, is playing an increasingly important role. With the continuous growth in demand for natural gas, its storage and transportation have become key aspects of industry development. Natural gas cooling and liquefaction devices have emerged to address this need. A search revealed Chinese patent CN221908910U, which discloses a natural gas liquefaction device, relating to the field of liquefaction device technology. The device includes a shell and an inner liner disposed inside the shell. A natural gas pipe is connected to the top of the inner liner, an inlet pipe is located at the top of the shell, and a drain pipe is connected to the bottom of the shell, with one end of the drain pipe extending into the interior of the inner liner. A partition plate is connected to the outer wall guide rod of the inner liner, and an annular groove is provided inside the inner liner. A worm gear is installed inside the annular groove, and a support frame is fixedly installed inside the shell. This invention utilizes a scraper design. When cleaning the inner liner is required, to improve cleaning efficiency, the drive motor rotates the worm gear, which in turn rotates the worm wheel. As the worm wheel rotates, it drives the scraper to rotate via a connecting block. As the scraper moves, it scrapes away the adsorbed substances on the inner wall of the liner, achieving the purpose of quickly cleaning the inner liner and reducing labor intensity.

[0003] The natural gas liquefaction device in the aforementioned patent has the following shortcomings: the device drives the worm and worm wheel to rotate through a motor, so that the scraper on the top of the connecting block at the top of the worm wheel scrapes the inner wall of the inner tank to clean the inside of the inner tank. However, since the natural gas will come into contact with the motor after liquefaction, the motor is prone to damage over time. Therefore, a natural gas cooling liquefaction device has been designed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a natural gas cooling and liquefaction device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A natural gas cooling liquefaction device includes an outer tank with an insulation layer on its outer wall to protect the temperature of liquid nitrogen. A partition is fixedly connected to the inner circumferential surface of the outer tank near its bottom. An inner tank is fixedly fitted within the partition, and a circular hole adapted to the inner tank is formed in the middle of the partition. A drain pipe is fixedly connected to the middle of the bottom of the inner tank, and a second control valve is installed through the bottom of the drain pipe and penetrates the outer tank. A circular hole adapted to the drain pipe is formed at the bottom of the outer tank. A rotating pipe is rotatably connected to the bottom outer side of the inner tank, and the rotating pipe is coaxial with the drain pipe. A rotating plate and a first synchronous pulley are fixedly fitted on the outer wall of the rotating pipe. A motor is fixedly connected to the bottom inner side of the outer tank, and a second synchronous pulley is fixedly connected to the top output pipe of the motor. A synchronous belt is fitted between the first and second synchronous pulleys. Support frames are fixedly connected to both ends of the top of the rotating plate, and a first magnet is fixedly connected to the top of each of the two support frames. The two first magnets have the same magnetism on the side closest to each other.

[0007] Preferably, a connecting plate is fixedly connected between the two sides of the bottom of the inner tank, and a rotating plate is rotatably connected to the top middle of the connecting plate. A second magnet is fixedly connected to both ends of the top of the rotating plate. The two second magnets have the same magnetism on the side away from each other, and the magnetism is opposite on the side of the outer side of each second magnet that is close to the first magnet. Through the cooperation of the first magnet and the second magnet, the rotating plate can be rotated slowly to drive the rotating plate to rotate.

[0008] Preferably, a round rod is fixedly connected to the top center of the rotating plate, and three scrapers are provided on the circumferential surface of the round rod. The scrapers are adapted to the inner wall of the inner tank, and the scrapers can clean the inner wall of the inner tank when the rotating plate rotates.

[0009] Preferably, the top of the inner tank is fixedly connected to an air inlet pipe, and the top of the inner tank is provided with a first control valve that penetrates the outer tank. The top of the outer tank is provided with a round hole that matches the air inlet pipe.

[0010] Preferably, a pressure gauge is fixedly installed on one side of the top of the inner tank, and the top of the pressure gauge is fixedly inserted through the outer tank. The top of the outer tank has a round hole that matches the pressure gauge. The pressure gauge can monitor the pressure inside the inner tank in real time to avoid excessive pressure.

[0011] Preferably, an inlet pipe is fixedly connected to one side of the top of the outer tank, and a third control valve is provided on the inlet pipe; a bracket is fixedly connected to the bottom of the outer side of the outer tank.

[0012] The beneficial effects of this utility model are as follows:

[0013] By employing technologies such as a motor, synchronous belt, first magnet, rotating plate, second magnet, and scraper, the inner tank is only connected to the drain pipe and inlet pipe, thus improving the service life of the motor and synchronous belt. When cleaning the inner wall of the inner tank is required, the motor drives the rotating plate to rotate, which, under the action of the first and second magnets, causes the rotating plate to rotate, allowing the scraper to scrape the inner wall of the inner tank. This effectively solves the problem of easy motor damage mentioned in the background technology, thereby reducing the frequency of motor replacement, lowering equipment maintenance costs and downtime. The tank does not need to be disassembled, making operation simple. It can promptly remove impurities and condensates from the inner tank wall, maintain the cleanliness of the device, and ensure the purity and quality of natural gas liquefaction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a natural gas cooling liquefaction device proposed in this utility model;

[0015] Figure 2 This is a cross-sectional view of the outer tank of a natural gas cooling liquefaction device proposed in this utility model;

[0016] Figure 3 This utility model proposes a natural gas cooling liquefaction device. Figure 2 An enlarged structural diagram at point A;

[0017] Figure 4 This is a cross-sectional structural diagram of the inner tank of a natural gas cooling liquefaction device proposed in this utility model.

[0018] In the diagram: 1. Outer tank; 2. Support; 3. Drain pipe; 4. Air inlet pipe; 401. First control valve; 5. Liquid inlet pipe; 6. Pressure gauge; 7. Inner tank; 701. Partition plate; 702. Connecting plate; 703. Rotating plate; 704. Second magnet; 705. Round rod; 706. Scraper; 8. Rotating pipe; 801. Rotating plate; 802. First synchronous pulley; 804. Motor; 805. Second synchronous pulley; 806. Synchronous belt; 807. Support frame; 808. First magnet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figures 1-4A natural gas cooling liquefaction device includes an outer tank 1 with an insulation layer on its outer wall. A partition 701 is fixedly connected to the inner circumferential surface of the outer tank 1 near its bottom. An inner tank 7 is fixedly fitted into the middle of the partition 701, with a circular hole in the middle of the partition 701 that matches the inner tank 7. A drain pipe 3 is fixedly connected to the middle of the bottom of the inner tank 7, and a second control valve is installed at the bottom of the drain pipe 3, penetrating the outer tank 1. A circular hole in the bottom of the outer tank 1 that matches the drain pipe 3 is also present. A rotating pipe 8 is rotatably connected to the bottom outer side of the inner tank 7, and the rotating pipe 8 is coaxial with the drain pipe 3. The rotation does not affect the stability of the drain pipe 3. The outer wall of the rotating pipe 8 is fixedly fitted with a rotating plate 801 and a first synchronous wheel 802. The bottom of the inner side of the outer tank 1 is fixedly connected to a motor 804, and the top output pipe of the motor 804 is fixedly connected to a second synchronous wheel 805. The first synchronous wheel 802 and the second synchronous wheel 805 are fitted with the same synchronous belt 806. The top two ends of the rotating plate 801 are fixedly connected to support frames 807. The top of the two support frames 807 is fixedly connected to a first magnet 808, and the two first magnets 808 have the same magnetism on the side that is close to each other.

[0021] In this utility model, a connecting plate 702 is fixedly connected between the two sides of the bottom of the inner can 7. A rotating plate 703 is rotatably connected to the top middle of the connecting plate 702. A second magnet 704 is fixedly connected to both ends of the top of the rotating plate 703. The two second magnets 704 have the same magnetism on the side away from each other, and the magnetism is opposite on the side of the outer side of each second magnet 704 that is close to the first magnet 808. Through the cooperation of the first magnet 808 and the second magnet 704, when the first magnet 808 and the second magnet 704 are close, the movement of the first magnet 808 will drive the second magnet 704 and the rotating plate 703 to rotate.

[0022] In this utility model, a round rod 705 is fixedly connected to the middle of the top of the rotating plate 703, and three scrapers 706 are provided on the circumferential surface of the round rod 705. The scrapers 706 are adapted to the inner wall of the inner tank 7. By rotating the round rod 705, the scrapers 706 clean the inner tank 7. At the same time, there are no gaps at the bottom of the inner tank 7, which ensures the airtightness of the inner tank 7.

[0023] In this utility model, the top of the inner tank 7 is fixedly connected to the air inlet pipe 4, and the top of the inner tank 7 is connected to the outer tank 1. A first control valve 401 is provided, and the top of the outer tank 1 is provided with a round hole that matches the air inlet pipe 4.

[0024] In this utility model, a pressure gauge 6 is fixedly installed on one side of the top of the inner tank 7, and the top of the pressure gauge 6 is fixedly inserted through the outer tank 1. The top of the outer tank 1 has a round hole that matches the pressure gauge 6. The pressure gauge 6 can detect the pressure inside the inner tank 7 to ensure the safety of the equipment.

[0025] In this utility model, an inlet pipe 5 is fixedly connected to one side of the top of the outer tank 1, and a third control valve is provided on the inlet pipe 5. A bracket 2 is fixedly connected to the bottom of the outer side of the outer tank 1.

[0026] Working principle: Liquid nitrogen is added to the inner tank 7 through the inlet pipe 5 to cool the inner tank 7. Gaseous natural gas is transported to the inner tank 7 through the booster pump and the air inlet pipe 4. Under the action of low temperature, the natural gas gradually liquefies and is stored inside the inner tank 7. It can be discharged through the drain pipe 3. When it is necessary to clean the inner wall of the inner tank 7, the motor 804 is started. Through the setting of the second synchronous pulley 805, the synchronous belt 806 and the first synchronous pulley 802, the rotating plate 801 rotates with the two first magnets 808. The cooperation of the first magnets 808 and the second magnets 704 causes the rotating plate 703 inside the inner tank 7 to rotate with the rotating plate 801 under the action of attraction. This causes the three scrapers 706 to scrape the inner wall of the inner tank 7, thus cleaning the inner wall of the inner tank 7.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A natural gas cooling and liquefaction plant comprising an outer tank (1), characterized in that, The outer tank (1) outer wall is provided with a heat preservation layer, the outer tank (1) inner wall circumferential surface is fixedly connected with the baffle (701) near the bottom, the baffle (701) middle part is fixedly provided with the inner tank (7), the baffle (701) middle part is provided with a circular hole matched with the inner tank (7), the inner tank (7) bottom middle part is fixedly connected with the drain pipe (3), and the drain pipe (3) bottom is provided with a second control valve penetrating the outer tank (1), the outer tank (1) bottom is provided with a circular hole matched with the drain pipe (3), the inner tank (7) outside bottom is rotatably connected with the rotating pipe (8), and the rotating pipe (8) is coaxial with the drain pipe (3), the rotating pipe (8) outer wall is fixedly provided with the rotating plate (801) and the first synchronous wheel (802), the outer tank (1) inside bottom is fixedly connected with the motor (804), and the motor (804) top output pipe is fixedly connected with the second synchronous wheel (805), and the first synchronous wheel (802) and the second synchronous wheel (805) are provided with the same synchronous belt (806), the rotating plate (801) top both ends are fixedly connected with the support frame (807), the two support frames (807) top are fixedly connected with the first magnet (808), and the two first magnets (808) are magnetically identical on the side close to each other.

2. The natural gas cooling and liquefaction apparatus according to claim 1, characterized by, The inner tank (7) inside bottom between both sides is fixedly connected with the connecting plate (702), the connecting plate (702) top middle part is rotatably connected with the rotating plate (703), and the rotating plate (703) top both ends are fixedly connected with the second magnet (704), and the two second magnets (704) are magnetically identical on the side away from each other, and the outer side of each second magnet (704) is magnetically opposite to the side close to the first magnet (808).

3. The natural gas cooling and liquefaction apparatus according to claim 2, characterized in that, The rotating plate (703) top middle part is fixedly connected with the circular rod (705), and the circular rod (705) circumferential surface is provided with three scrapers (706), and the scraper (706) is matched with the inner wall of the inner tank (7).

4. The natural gas cooling and liquefaction apparatus according to claim 1, characterized by, The inner tank (7) top is fixedly connected with the air inlet pipe (4), and the top of the air inlet pipe (4) penetrates the outer tank (1) and is provided with a first control valve (401), and the top of the outer tank (1) is provided with a circular hole matched with the air inlet pipe (4).

5. The natural gas cooling and liquefaction apparatus according to claim 1, wherein, The inner tank (7) top is fixedly connected with the air inlet pipe (4), and the top of the air inlet pipe (4) penetrates the outer tank (1) and is provided with a first control valve (401), and the top of the outer tank (1) is provided with a circular hole matched with the air inlet pipe (4).

6. The natural gas cooling and liquefaction apparatus according to claim 1, wherein, The outer tank (1) top is fixedly connected with the air inlet pipe (4), and the top of the air inlet pipe (4) penetrates the outer tank (1) and is provided with a first control valve (401), and the top of the outer tank (1) is provided with a circular hole matched with the air inlet pipe (4). The outer tank (1) top is fixedly connected with the air inlet pipe (4), and the top of the air inlet pipe (4) penetrates the outer tank (1) and is provided with a first control valve (401), and the top of the outer tank (1) is provided with a circular hole matched with the air inlet pipe (4).

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