A liquid carbon dioxide high-pressure and high-temperature gasification device

Abstract

The present invention provides a high-pressure, high-temperature liquid carbon dioxide gasification device, comprising a liquid carbon dioxide storage tank connected to a liquid carbon dioxide supply pipe. The device is characterized in that the liquid carbon dioxide storage tank is connected to a low-temperature liquid carbon dioxide booster pump via a first pipeline, which in turn is connected to a U-shaped liquid carbon dioxide vaporizer via a first pipeline. The U-shaped liquid carbon dioxide vaporizer is connected to a high-pressure gaseous carbon dioxide storage tank assembly via a second pipeline, which in turn is connected to downstream users via pipelines. The U-shaped liquid carbon dioxide vaporizer is connected to a high-temperature wastewater pipe, and the high-pressure gaseous carbon dioxide storage tank assembly is wrapped with a water jacket connected to the high-temperature wastewater pipe. This device improves the gasification rate and utilization rate of liquid carbon dioxide, and reduces energy consumption in enterprises.

Description

Technical Field

[0001] The present invention relates to a gasification device, in particular to a liquid carbon dioxide high-pressure and high-temperature gasification device, belonging to the technical field of gas preparation and storage. Background Art

[0002] There are many types of liquefied gas vaporization devices, including steam-heated vaporizers, forced-draft vaporizers, and electrically heated vaporizers. Most are used for the conventional vaporization of LNG, liquefied petroleum gas, liquid oxygen, and liquid carbon dioxide. These vaporization devices require a large amount of heat energy during operation. To ensure the efficiency of the vaporization devices, companies use steam generators, boilers, and other equipment to provide heat. This not only results in a large amount of heat energy consumption, but also requires companies to divert a portion of the already scarce thermal energy medium to the vaporization devices, further increasing energy consumption. In addition, existing liquid carbon dioxide vaporization devices are complex in structure and costly, making subsequent repair and maintenance inconvenient. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0003] In order to solve the problems of high energy consumption, complex structure, inconvenient maintenance and other problems existing in the existing liquid carbon dioxide gasification device, the present invention provides a liquid carbon dioxide high-pressure and high-temperature gasification device.

[0004] The present invention is completed by the following technical solutions: a liquid carbon dioxide high-pressure and high-temperature gasification device, comprising a liquid carbon dioxide storage tank connected to a liquid carbon dioxide supply pipe, characterized in that the liquid carbon dioxide storage tank is connected to a low-temperature liquid carbon dioxide booster pump through a first pipeline, the low-temperature liquid carbon dioxide booster pump is connected to a U-shaped liquid carbon dioxide gasifier through a first pipeline, the U-shaped liquid carbon dioxide gasifier is connected to a gaseous carbon dioxide high-pressure storage tank group through a second pipeline, and the gaseous carbon dioxide high-pressure storage tank group is connected to downstream users through a pipeline, wherein: the U-shaped liquid carbon dioxide gasifier The device is connected to the high-temperature wastewater pipe, and the gaseous carbon dioxide high-pressure storage tank group is wrapped with a water jacket connected to the high-temperature wastewater pipe, so that the liquid carbon dioxide can be pressurized to the required pressure by a low-temperature liquid carbon dioxide booster pump and then sent to the U-shaped liquid carbon dioxide gasifier to complete gasification. While improving the gasification rate of liquid carbon dioxide, pressurized carbon dioxide gas is transported outward for pressure difference energy storage power generation or to drive mechanical work, thereby realizing the effective utilization of carbon dioxide. The high-temperature wastewater generated by gasification is used to insulate the gaseous carbon dioxide high-pressure storage tank group, making full use of thermal energy and reducing enterprise energy consumption.

[0005] The liquid carbon dioxide storage tanks are arranged in multiple numbers in parallel, and the inlet end of each liquid carbon dioxide storage tank is connected to the liquid carbon dioxide supply pipe, and the outlet end is connected to the corresponding U-shaped liquid carbon dioxide gasifier through a first pipeline with a low-temperature liquid carbon dioxide booster pump, and a bypass pipe connecting the liquid carbon dioxide supply pipe and the first pipeline is provided next to the liquid carbon dioxide storage tank, and the bypass pipe is provided with an emptying valve; the liquid carbon dioxide storage tank is provided with a pressure relief valve, a safety valve, a manhole, a sewage outlet, a pressure sensor, a temperature sensor, and a liquid level sensor in sequence, so that the liquid carbon dioxide delivered by the upstream equipment can be stored through the liquid carbon dioxide storage tank, the safety of the tank body is ensured by the pressure relief valve, the safety valve, the pressure sensor, the temperature sensor, and the liquid level sensor, and the carbon dioxide is easily discharged through the bypass pipe and the emptying valve.

[0006] The first pipeline is provided with a liquid carbon dioxide shut-off valve and a pipeline high-pressure low-temperature compensator in sequence, so as to compensate the pressure of the liquid carbon dioxide entering the low-temperature liquid carbon dioxide booster pump through the pipeline high-pressure low-temperature compensator.

[0007] The cryogenic liquid carbon dioxide booster pump is a conventional product and is arranged in one-to-one correspondence with the liquid carbon dioxide storage tank. The driving motor in each cryogenic liquid carbon dioxide booster pump is set as a variable frequency speed regulation motor, so that the liquid carbon dioxide pressure can be adjusted in time through the design of variable frequency speed regulation and pressure regulation, thereby ensuring the maximization of the gasification rate.

[0008] The U-shaped liquid carbon dioxide gasifier is adaptable to the liquid carbon dioxide storage tank and is provided in multiple configurations. The U-shaped gasifier comprises a vertical U-shaped shell with a cavity therein, openings at both ends of the top, and a sewage outlet at the bottom. The openings at both ends of the top are provided with sealing plates with a plurality of through holes thereon, wherein:

[0009] A plurality of U-shaped heat exchange tubes of corresponding shapes are provided in the cavity of the vertical U-shaped shell. The top ends of the plurality of U-shaped heat exchange tubes are connected to the through holes of the sealing plate on the opening in a one-to-one correspondence. In addition, the openings at the top ends of the vertical U-shaped shell are respectively provided with end caps with a liquid inlet and an air outlet thereon. The liquid inlet is connected to the outlet of the low-temperature liquid carbon dioxide booster pump through a pipeline, and the air outlet is connected to the inlet of the gaseous carbon dioxide high-pressure storage tank group through a second pipeline.

[0010] The vertical U-shaped shell is provided with a first water inlet, a second water inlet and a water outlet connected to the cavity, wherein: the first water inlet and the second water inlet are connected to the high-temperature wastewater tank through a first hot water supply pipe and a second hot water supply pipe respectively, and the water outlet is connected to the return water tank through a return pipe;

[0011] By transporting high-temperature wastewater into the cavity of the vertical U-shaped shell, the liquid carbon dioxide passing through the U-shaped heat exchange tube absorbs heat and gradually vaporizes. The entire gasification process is under a high-temperature and high-pressure environment, with high gasification efficiency. When the first stage of heat supply is insufficient, the second stage of heat supply is started to ensure the gasification temperature.

[0012] The first pipeline is sequentially provided with a pipeline high-pressure low-temperature compensator, a low-temperature check valve, a liquid carbon dioxide shut-off valve, a liquid carbon dioxide flowmeter, a flow regulating valve, a pressure sensor, a temperature sensor, a vent valve and a safety valve; the second pipeline is sequentially provided with a safety valve, a pressure sensor, a temperature sensor and a vent valve; so as to ensure the safety of pipeline operation through various valves and sensors and regulate the medium running in the pipeline.

[0013] The first-stage hot water supply pipe and the second-stage hot water supply pipe are respectively provided with a regulating valve, a flow meter, a pressure sensor and a temperature sensor, and the return pipe is provided with a temperature sensor.

[0014] The gaseous carbon dioxide high-pressure storage tank group includes: a plurality of horizontal long storage tanks arranged in parallel above and below, and a water jacket sleeved on the outer wall of each long storage tank and provided with a water supply port and a drain port. The inlet end and outlet end of the plurality of horizontal long storage tanks are respectively provided with an inlet end ring pipe and an outlet end ring pipe, wherein: the inlet end ring pipe is connected to a plurality of U-shaped liquid carbon dioxide gasifiers through a second pipeline, the outlet end ring pipe is connected to a downstream user through a high-pressure carbon dioxide gas supply pipe, the water supply port is connected to a high-temperature wastewater pool through a water supply pipe, and the drain port is connected to a return water pool through a drain pipe, so that the high-pressure gaseous carbon dioxide in the gaseous carbon dioxide high-pressure storage tank group is reheated by the high-temperature wastewater in the water jacket, thereby generating pressurized gas with greater kinetic energy, which is provided for downstream users to perform pressure difference energy storage power generation or drive machinery to perform work.

[0015] A safety valve is provided on the inlet ring pipe, a pressure sensor, a temperature sensor, a check valve, a flow meter and an outlet shut-off valve are provided on the second pipeline in sequence, a regulating valve, a pressure sensor, a temperature sensor and a flow meter are provided on the water supply pipe in sequence, and a temperature sensor is provided on the drainage pipe to ensure the safe operation of the pipeline.

[0016] The present invention has the following advantages and effects: Using the above scheme, liquid carbon dioxide is pressurized to the required pressure by a low-temperature liquid carbon dioxide booster pump and then fed into a U-shaped liquid carbon dioxide vaporizer for gasification. While increasing the gasification rate of the liquid carbon dioxide, pressurized carbon dioxide gas is transported outward for use in pressure differential energy storage to generate electricity or drive mechanical work, thereby achieving effective utilization of carbon dioxide. The high-temperature wastewater generated by gasification is used to insulate the gaseous carbon dioxide high-pressure storage tank group, fully utilizing thermal energy, improving the liquid carbon dioxide gasification rate and utilization rate, and reducing enterprise energy consumption. By utilizing the large latent heat of vaporization of liquid carbon dioxide and the greater specific heat capacity per unit volume of gaseous carbon dioxide than air, the waste heat of the high-temperature wastewater can be effectively recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 for Figure 1 The structure diagram of the liquid carbon dioxide storage tank;

[0019] Figure 3 for Figure 1 The structural diagram of the U-shaped liquid carbon dioxide gasifier;

[0020] Figure 4 for Figure 3 AA view;

[0021] Figure 5 for Figure 1 The structural diagram of the gaseous carbon dioxide high-pressure storage tank group;

[0022] Figure 6 for Figure 5 Right view;

[0023] Figure 7 for Figure 1 The U-shaped liquid carbon dioxide vaporizer heating structure diagram;

[0024] Figure 8 for Figure 1 Heating structure diagram of gaseous carbon dioxide high-pressure storage tank group. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] The liquid carbon dioxide high-pressure and high-temperature gasification device provided by the present invention includes a liquid carbon dioxide storage tank 4 connected to a liquid carbon dioxide supply pipe 1, the liquid carbon dioxide storage tank 4 is connected to a low-temperature liquid carbon dioxide booster pump 6 through a first pipe 5, the low-temperature liquid carbon dioxide booster pump 6 is connected to a U-shaped liquid carbon dioxide gasifier 7 through a first pipe 5, the U-shaped liquid carbon dioxide gasifier 7 is connected to a gaseous carbon dioxide high-pressure storage tank group 10 through a second pipe 8, and the gaseous carbon dioxide high-pressure storage tank group 10 is connected to downstream users through a pipe, wherein: the U-shaped liquid carbon dioxide gasifier 7 is connected to the high-temperature wastewater pipe The gaseous carbon dioxide high-pressure storage tank group 10 is wrapped with a water jacket 36 connected to the high-temperature wastewater pipe, so that the liquid carbon dioxide is pressurized to the required pressure (such as 6-7 MPa) by the low-temperature liquid carbon dioxide booster pump 6 and then sent to the U-shaped liquid carbon dioxide gasifier 7 for gasification. While improving the gasification rate of the liquid carbon dioxide, the pressurized carbon dioxide gas is transported outward for pressure difference energy storage power generation or driving mechanical work, thereby realizing the effective utilization of carbon dioxide. The high-temperature wastewater generated by gasification is used to keep the gaseous carbon dioxide high-pressure storage tank group 10 warm, fully utilizing the thermal energy and reducing the energy consumption of the enterprise.

[0027] There are multiple liquid carbon dioxide storage tanks 4 arranged in parallel, the inlet end of each liquid carbon dioxide storage tank 4 is connected to the liquid carbon dioxide supply pipe 1, and the outlet end is connected to the corresponding U-shaped liquid carbon dioxide gasifier 7 through a first pipeline 5 with a low-temperature liquid carbon dioxide booster pump 6, and a bypass pipe 2 connecting the liquid carbon dioxide supply pipe 1 and the first pipeline 5 is provided next to the liquid carbon dioxide storage tank 4, and the bypass pipe 2 is provided with an emptying valve; the liquid carbon dioxide storage tank 4 is provided with a pressure relief valve 16, a safety valve 14, a manhole 15, a sewage outlet 19, a pressure sensor 17, a temperature sensor 18, and a liquid level sensor 20 in sequence, so that the liquid carbon dioxide delivered by the upstream equipment can be stored through the liquid carbon dioxide storage tank 4, and the safety of the tank body is ensured by the pressure relief valve 16, the safety valve 14, the pressure sensor 17, the temperature sensor 18, and the liquid level sensor 20, and the carbon dioxide is easily discharged through the bypass pipe 2 and the emptying valve. Figure 1 、 Figure 7 ;

[0028] The first pipeline 5 is provided with a liquid carbon dioxide shut-off valve and a pipeline high-pressure low-temperature compensator (not shown in the figure) in order to compensate the pressure of the liquid carbon dioxide entering the low-temperature liquid carbon dioxide booster pump 6 through the pipeline high-pressure low-temperature compensator;

[0029] The cryogenic liquid carbon dioxide booster pumps 6 are conventional products and are provided in a one-to-one correspondence with the liquid carbon dioxide storage tanks 4. The drive motor in each cryogenic liquid carbon dioxide booster pump 6 is a variable frequency speed regulating motor. This allows for timely adjustment of the liquid carbon dioxide pressure through variable frequency speed regulation and pressure regulation, thereby maximizing the gasification rate.

[0030] The U-shaped liquid carbon dioxide vaporizer 7 is adaptively provided with multiple liquid carbon dioxide storage tanks 4, which include a vertical U-shaped shell 21 with a cavity 24, open ends at the top, and a sewage outlet 30 at the bottom. The open ends at the top are provided with sealing plates 31 with a plurality of through holes 32, wherein:

[0031] A plurality of U-shaped heat exchange tubes 23 of a corresponding shape are disposed within the cavity 24 of the vertical U-shaped shell 21. The top ends of the plurality of U-shaped heat exchange tubes 23 are in one-to-one communication with the through holes 32 of the sealing plate 31 on the open portion. Furthermore, end caps 28 with a liquid inlet 26 and an air outlet 27 are respectively disposed on the open ends of the top of the vertical U-shaped shell 21. The liquid inlet 26 is connected to the outlet of the cryogenic liquid carbon dioxide booster pump 6 via a pipe 5, and the air outlet 27 is connected to the inlet of the gaseous carbon dioxide high-pressure storage tank group 10 via a second pipe 8.

[0032] The vertical U-shaped shell 21 is provided with a first water inlet 29, a second water inlet 22 and a water outlet 25 connected to the cavity 24, wherein: the first water inlet 29 and the second water inlet 22 are connected to the high-temperature wastewater tank through a first hot water supply pipe 11 and a second hot water supply pipe 13 respectively, and the water outlet 25 is connected to the return water tank through the return pipe 12. Figure 3 、 Figure 1 、 Figure 7 ;

[0033] By transporting high-temperature wastewater into the cavity of the vertical U-shaped shell 21, the liquid carbon dioxide passing through the U-shaped heat exchange tube 23 absorbs heat and gradually vaporizes. The entire gasification process is under a high-temperature and high-pressure environment, and the gasification efficiency is high. When the first stage of heat supply is insufficient, the second stage of heat supply is activated to ensure the gasification temperature.

[0034] The first pipeline 5 is provided with a pipeline high-pressure low-temperature compensator, a low-temperature check valve, a liquid carbon dioxide shut-off valve, a liquid carbon dioxide flow meter, a flow regulating valve, a pressure sensor, a temperature sensor, a vent valve and a safety valve (not shown in the figure), as shown in the following sequence: Figure 1 ;

[0035] The second pipeline 8 is provided with a safety valve, a pressure sensor, a temperature sensor and a vent valve in sequence. Figure 1 ;

[0036] The first stage hot water supply pipe 11 and the second stage hot water supply pipe 13 are respectively provided with a regulating valve 39, a flow meter 40, a pressure sensor 17 and a temperature sensor 18, and the return pipe 12 is provided with a temperature sensor. Figure 7 ;

[0037] In order to ensure the safety of pipeline operation through various valves and sensors, and to regulate the medium running in the pipeline;

[0038] The gaseous carbon dioxide high-pressure storage tank group 10 includes: a plurality of horizontal long storage tanks 34 arranged in parallel above and below, and a water jacket 36 sleeved on the outer wall of each long storage tank 34 and provided with a water supply port 37 and a drain port 35. The inlet and outlet ends of the plurality of horizontal long storage tanks 34 are respectively provided with an inlet ring pipe 38 and an outlet ring pipe 33, wherein: the inlet ring pipe 38 is connected to the plurality of U-shaped liquid carbon dioxide vaporizers 7 through a second pipeline 8, the outlet ring pipe 33 is connected to the downstream user through a high-pressure carbon dioxide gas supply pipe, the water supply port 37 is connected to the high-temperature wastewater pool through the water supply pipe 3, and the drain port 35 is connected to the return water pool through the drain pipe 9, so that the high-pressure gaseous carbon dioxide in the gaseous carbon dioxide high-pressure storage tank group 10 is reheated by the high-temperature wastewater in the water jacket 36, thereby generating pressurized gas with greater kinetic energy, which is provided to the downstream user for pressure difference energy storage power generation or driving mechanical work;

[0039] A safety valve 14 is provided on the inlet ring pipe 38, a pressure sensor, a temperature sensor, a check valve, a flow meter and an outlet shut-off valve are provided on the second pipeline 8 in sequence, a regulating valve 39, a pressure sensor 17, a temperature sensor 18 and a flow meter 40 are provided on the water supply pipe 3 in sequence, and a temperature sensor is provided on the drain pipe 9 to ensure the safe operation of the pipeline.

Claims

1. A liquid carbon dioxide high-pressure and high-temperature gasification device, comprising a liquid carbon dioxide storage tank connected to a liquid carbon dioxide supply pipe, characterized in that The liquid carbon dioxide storage tank is connected to the cryogenic liquid carbon dioxide booster pump through a first pipeline, the cryogenic liquid carbon dioxide booster pump is connected to the U-shaped liquid carbon dioxide vaporizer through a first pipeline, the U-shaped liquid carbon dioxide vaporizer is connected to the gaseous carbon dioxide high-pressure storage tank group through a second pipeline, and the gaseous carbon dioxide high-pressure storage tank group is connected to downstream users through pipelines, wherein: the U-shaped liquid carbon dioxide vaporizer is connected to the high-temperature wastewater pipe, and the gaseous carbon dioxide high-pressure storage tank group is wrapped with a water jacket connected to the high-temperature wastewater pipe; The U-shaped liquid carbon dioxide gasifier is adaptable to the liquid carbon dioxide storage tank and is provided in multiple configurations. The U-shaped liquid carbon dioxide gasifier comprises: a vertical U-shaped shell having a cavity therein, openings at both ends of the top, and a sewage outlet at the bottom. The openings at both ends of the top are provided with sealing plates with a plurality of through holes thereon, wherein: A plurality of U-shaped heat exchange tubes of corresponding shapes are provided in the cavity of the vertical U-shaped shell. The top ends of the plurality of U-shaped heat exchange tubes are connected to the through holes of the sealing plate on the opening in a one-to-one correspondence. In addition, the openings at the top ends of the vertical U-shaped shell are respectively provided with end caps with a liquid inlet and an air outlet thereon. The liquid inlet is connected to the outlet of the low-temperature liquid carbon dioxide booster pump through a pipeline, and the air outlet is connected to the inlet of the gaseous carbon dioxide high-pressure storage tank group through a second pipeline. The vertical U-shaped shell is provided with a first water inlet, a second water inlet and a water outlet connected to the cavity, wherein: the first water inlet and the second water inlet are connected to the high-temperature wastewater tank through a first hot water supply pipe and a second hot water supply pipe respectively, and the water outlet is connected to the return water tank through a return pipe; The multiple liquid carbon dioxide storage tanks are arranged in parallel, the inlet end of each liquid carbon dioxide storage tank is connected to the liquid carbon dioxide supply pipe, and the outlet end is connected to the corresponding U-shaped liquid carbon dioxide gasifier through a first pipeline with a low-temperature liquid carbon dioxide booster pump, and a bypass pipe connecting the liquid carbon dioxide supply pipe and the first pipeline is provided next to the liquid carbon dioxide storage tank, and the bypass pipe is provided with an emptying valve; the liquid carbon dioxide storage tank is provided with a pressure relief valve, a safety valve, a manhole, a sewage outlet, a pressure sensor, a temperature sensor, and a liquid level sensor in sequence.

2. The liquid carbon dioxide high-pressure and high-temperature gasification device according to claim 1, characterized in that The first pipeline is provided with a liquid carbon dioxide shut-off valve and a pipeline high-pressure and low-temperature compensator in sequence.

3. The liquid carbon dioxide high-pressure and high-temperature gasification device according to claim 1, characterized in that The cryogenic liquid carbon dioxide booster pumps are arranged in a one-to-one correspondence with the liquid carbon dioxide storage tanks, and the driving motor in each cryogenic liquid carbon dioxide booster pump is configured as a variable frequency speed regulating motor.

4. The liquid carbon dioxide high-pressure and high-temperature gasification device according to claim 1, characterized in that The first pipeline is sequentially provided with a pipeline high-pressure low-temperature compensator, a low-temperature check valve, a liquid carbon dioxide shut-off valve, a liquid carbon dioxide flowmeter, a flow regulating valve, a pressure sensor, a temperature sensor, a vent valve and a safety valve; the second pipeline is sequentially provided with a safety valve, a pressure sensor, a temperature sensor and a vent valve.

5. The liquid carbon dioxide high-pressure and high-temperature gasification device according to claim 1, characterized in that The first-stage hot water supply pipe and the second-stage hot water supply pipe are respectively provided with a regulating valve, a flow meter, a pressure sensor and a temperature sensor, and the return pipe is provided with a temperature sensor.

6. The liquid carbon dioxide high-pressure and high-temperature gasification device according to claim 1, characterized in that The gaseous carbon dioxide high-pressure storage tank group includes: multiple horizontal long storage tanks arranged in parallel above and below, and a water jacket sleeved on the outer wall of each long storage tank with a water supply port and a drain port provided thereon. The multiple horizontal long storage tanks are respectively provided with an inlet ring pipe and an outlet ring pipe at the inlet end and the outlet end, wherein: the inlet ring pipe is connected to multiple U-shaped liquid carbon dioxide gasifiers through a second pipeline, the outlet ring pipe is connected to downstream users through a high-pressure carbon dioxide gas supply pipe, the water supply port is connected to a high-temperature wastewater pool through a water supply pipe, and the drain port is connected to a return water pool through a drain pipe.

7. The liquid carbon dioxide high-pressure and high-temperature gasification device according to claim 6, characterized in that The inlet ring pipe is provided with a safety valve, the second pipeline is provided with a pressure sensor, a temperature sensor, a check valve, a flow meter and an outlet shut-off valve in sequence, the water supply pipe is provided with a regulating valve, a pressure sensor, a temperature sensor and a flow meter in sequence, and the drainage pipe is provided with a temperature sensor.

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