Novel refined carbon three material storage and transportation system

Abstract

The application discloses a novel refined carbon three material storage and transportation system, and designs a tank area composition and connection in the scheme, wherein the first BOG treatment system is mainly used for treating the gas phase components in the low-temperature propane tank, the second BOG treatment system is mainly used for treating the gas phase components in the refined carbon three spherical tank, and the third BOG treatment system is mainly used for treating the gas phase components in the mixed carbon four spherical tank. The whole system saves multiple sets of compression and cooling mechanisms, and the cost is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of petroleum gas storage and transportation technology, and specifically to a novel refined C3 material storage and transportation system. Background Technology

[0002] Our company previously proposed a C3 storage and transportation system in patent application CN216079324U, which mainly consists of an ambient temperature propane tank, a cryogenic propane tank, a refined C3 spherical tank, and a mixed C4 spherical tank. The refined C3 spherical tank is connected to the mixed C4 spherical tank for pressurization during the low-temperature season, and the cryogenic propane tank is connected to the ambient temperature propane tank to compensate for the vacuum condition of the cryogenic propane spherical tank. This storage and transportation system also includes a BOG processing system for the refined C3 spherical tank and corresponding BOG processing systems for the cryogenic propane tank, etc., to effectively recover flammable and explosive vapors and improve safety. Commonly used BOG processing systems generally compress first and then cool, and additional cooling is required to the required state when returning to the cryogenic propane tank. The installation and operation costs of this multi-set BOG processing system are relatively high and need to be improved. Summary of the Invention

[0003] To address at least one of the aforementioned technical deficiencies, the present invention provides the following technical solution:

[0004] This application discloses a novel refined C3 material storage and transportation system, including a refined C3 spherical tank, a mixed C4 spherical tank, an ambient temperature propane tank, and a cryogenic propane tank. A first gas phase transport pipeline is provided between the refined C3 spherical tank and the mixed C4 spherical tank. The system also includes a first BOG processing system, a second BOG processing system, and a third BOG processing system. The first BOG processing system includes a gas-liquid separator, a compressor, a cooling mechanism, a liquid separator, and a collection tank connected in sequence. The gas-liquid separator is connected to the cryogenic propane tank to transport gas phase components, and the collection tank is connected to the ambient temperature propane tank to transport liquid phase components. The second BOG processing system includes a second collection tank, a second compressor, a second cooling mechanism, and a second liquid separator connected in sequence. The third BOG processing system includes a cooling mechanism 3. The collection tank 2 is connected to the refined C3 spherical tank to transport gaseous components. The collection tank 1 is connected to the tube side 1 and shell side of the cooling mechanism 3 via branch pipes, and a throttling valve is installed on the pipe connected to the shell side. The shell side of the cooling mechanism 3 is connected to the gas-liquid separator. The liquid separator 2 is connected to the tube side 2 of the cooling mechanism 3. The cooling mechanism 3 is connected to the refined C3 spherical tank and the cryogenic propane tank to transport liquid components. The third BOG processing system includes a cooling mechanism 4. The inlet and outlet of the cooling mechanism 4 are connected to the gaseous outlet and liquid inlet of the mixed C4 spherical tank, respectively. The liquid separator 1 is connected to the cooling mechanism 4 to supply a cold source. The gaseous outlet of the cooling mechanism 4 is connected to the gas-liquid separator.

[0005] This design incorporates the tank farm composition and connections. The first BOG (Bottle-Off Gas) processing system primarily processes the gaseous components within the cryogenic propane tank. The second BOG processing system primarily processes the gaseous components within the refined C3 spherical tank. The third BOG processing system primarily processes the gaseous components within the mixed C4 spherical tank. Specifically, the first BOG processing system extracts the gaseous components from the cryogenic propane tank, first separating them using a gas-liquid separator. The gaseous components, after compression and cooling, enter a liquid separator. The liquid in the liquid separator enters a cooling mechanism four, which acts as a cold source to liquefy the gaseous components discharged from the mixed C4 spherical tank. The gaseous components in the cooling mechanism four... After liquefaction, the liquid phase is transported back to the mixing C4 spherical tank. The liquid phase component in the first separator enters the first collection tank, and the liquid phase component in the first collection tank enters the room temperature propane storage tank for easy extraction. The liquid phase component in the first collection tank acts as a cold source and is cooled by the throttling valve before being transported to the shell side of the third cooling mechanism. The liquid phase components in the first collection tank and the second separator are cooled as they pass through the corresponding tubes in the third cooling mechanism and are then transported back to the low-temperature propane tank and the refined C3 spherical tank, respectively. The components in the shell side of the third cooling mechanism are transported to the gas-liquid separator for recompression and liquefaction. The entire system saves multiple sets of compression and cooling mechanisms, significantly reducing costs.

[0006] Furthermore, the first liquid separator is connected to the gas-liquid separator to transport the gas phase components. The gas phase components separated in the first liquid separator re-enter the gas-liquid separator for further compression, cooling, and liquefaction.

[0007] Furthermore, it also includes a pre-storage tank, the outlet of which is connected to the collection tank 2 and the mixing C4 spherical tank respectively, and the inlet of which is connected to the separator tank 2 to transport gas phase components. The gas phase components are pre-stored in the pre-storage tank for a short time to facilitate pressurization of the mixing C4 spherical tank.

[0008] Furthermore, the low-temperature propane tank is connected to the room-temperature propane tank, and a heating mechanism is installed on the connecting pipe. After being heated, the low-temperature propane tank is brought to room temperature to replenish the room-temperature propane tank, which is convenient for use.

[0009] Furthermore, the ambient temperature propane tank and the cryogenic propane tank are connected, allowing the ambient temperature propane tank to replenish the vacuum condition of the cryogenic propane tank and to replace nitrogen, thereby improving energy utilization.

[0010] Furthermore, the ambient temperature propane tank is connected to the gas-liquid separator to transport gaseous components. The ambient temperature propane tank and the low temperature propane tank share the same BOG processing system, which helps to reduce costs.

[0011] Furthermore, it also includes a fuel gas buffer tank and a flare starter lamp. The first gas phase delivery pipeline is connected to the fuel gas buffer tank via a branch pipe. The fuel gas buffer tank is connected to the flare starter lamp. Propane gas phase is used to replace natural gas as the starter lamp dye, which helps to reduce the pressure in the spherical tank.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. This invention redesigns the tank farm composition and BOG handling system, saving multiple sets of compression and cooling mechanisms and reducing costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the process of the novel refined C3 material storage and transportation system in Example 1;

[0016] The attached figures are labeled as follows:

[0017] 1. Low-temperature propane tank; 2. Normal-temperature propane tank; 3. Mixed C4 spherical tank; 4. Refined C3 spherical tank; 5. Fuel gas buffer tank; 6. Flare lamp; 7. Gas-liquid separator; 8. Compressor I; 9. Cooling mechanism I; 10. Separator I; 11. Collection tank I; 12. Collection tank II; 13. Compressor II; 14. Cooling mechanism II; 15. Separator II; 16. Pre-storage tank; 17. Cooling mechanism III; 18. Cooling mechanism IV; 19. Transfer pump; 20. Branch pipe I; 21. Branch pipe II; 22. First gas phase transfer pipe 23. Second gas phase transport pipeline; 24. Liquid phase transport pipeline one; 25. Third gas phase transport pipeline; 26. Fourth gas phase transport pipeline; 27. Liquid phase transport pipeline two; 28. Heating mechanism; 29. ​​Liquid phase transport pipeline three; 30. Fifth gas phase transport pipeline; 31. Liquid phase transport pipeline four; 32. Liquid phase transport pipeline five; 33. Branch pipe three; 34. Throttling valve; 35. Branch pipe four; 36. Liquid phase transport pipeline six; 37. Sixth gas phase transport pipeline; 38. Liquid phase transport pipeline seven; 39. Seventh gas phase transport pipeline. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] like Figure 1 As shown, the novel refined C3 material storage and transportation system in this example includes a refined C3 spherical tank 4, a mixed C4 spherical tank 3, an ambient temperature propane tank 2, a cryogenic propane tank 1, a first BOG processing system, a second BOG processing system, and a third BOG processing system. A first gas phase conveying pipeline 22 is installed between the refined C3 spherical tank 4 and the mixed C4 spherical tank 3 to connect them.

[0021] The first BOG processing system includes a gas-liquid separator 7, a compressor 8, a cooling mechanism 9, a liquid separator 10, and a collection tank 11, connected sequentially by pipelines. The inlet of the gas-liquid separator 7 is connected via a pipeline to the gas phase outlet at the top or upper part of the cryogenic propane tank 1 to transport gas phase components. After gas-liquid separation, the separated gas phase components are compressed by the compressor 8, cooled and liquefied by the cooling mechanism 9, and then transferred to the liquid separator 10. The type of compressor 8 can be selected according to requirements, as can the cooling mechanism, such as an air cooler, water cooler, or liquefier, depending on the needs. A portion of the liquid phase in the liquid separator 10 enters the collection tank 11, which is connected to the liquid phase inlet of the ambient temperature propane tank 2 via a liquid phase transport pipeline 29 to transport the liquid phase components.

[0022] Optionally, the separator 10 and the gas-liquid separator 7 can be connected via a third gas phase delivery pipe 25. The gas phase components separated in the separator 10 enter the gas-liquid separator 7 for secondary compression and cooling liquefaction. Alternatively, the gas phase outlet of the ambient temperature propane tank 2 can be connected to the gas-liquid separator via a fourth gas phase delivery pipe 26 to deliver the gas phase components. The ambient temperature propane tank 2 and the low temperature propane tank 1 share the same BOG processing system, which helps reduce costs.

[0023] The second BOG processing system includes a collection tank 2 12, a compressor 2 13, a cooling mechanism 2 14, a liquid separator 2 15, and a cooling mechanism 3 17 connected in sequence by pipes. The collection tank 2 12 is connected to the upper or top gas phase outlet of the refined C3 spherical tank 4 to transport the gas phase components. The gas phase components in the collection tank 2 12 are compressed by the compressor 2 13 and liquefied by the cooling mechanism 2 14 before entering the liquid separator 2 15. The liquid phase outlet at the bottom of the liquid separator 2 15 is connected to the tube side 2 of the cooling mechanism 3 17 through the liquid phase transport pipe 5 32. The cooling mechanism 3 is a self-cooling evaporator, such as a kettle heat exchanger. The outlet of the tube side 2 of the cooling mechanism 3 17 is connected to the liquid phase inlet of the refined C3 spherical tank 4 through the liquid phase transport pipe 4 31.

[0024] The collecting tank 11 is connected to the first tube side of the cooling mechanism 17 via the third branch pipe 33. The first tube side and the second tube side are independent, and the lengths of the first tube side and the second tube side are different to meet different cooling requirements. The collecting tank 11 is connected to the shell side of the cooling mechanism 17 via the fourth branch pipe 35. Part of the liquid phase in the collecting tank 11 is used as a cold source. A throttling valve 34 is installed on the fourth branch pipe 35. After the liquid phase in the collecting tank 11 is throttled by the throttling valve 34, the pressure and temperature of the liquid phase in the collecting tank 11 are reduced at the same time. This can perform heat exchange and cooling on the liquid in the tube side. The liquid phase in the second tube side after heat exchange and subcooling enters the refined carbon 3 ball tank 4, and the liquid phase in the first tube side enters the cryogenic propane tank 1.

[0025] The outlet of the shell side of the cooling mechanism 317 is connected to the gas-liquid separator 7 through the sixth gas phase transport pipe 37 for further compression, cooling and liquefaction.

[0026] Optionally, a pre-storage tank 16 can be added. The gas phase outlet of the pre-storage tank 16 is connected to the collection tank 12 via a pipeline, and to the mixing C4 spherical tank 3 via the fifth gas phase delivery pipeline 30, to replenish the pressure of the mixing C4 spherical tank 3 under low pressure in winter. Optionally, the fifth gas phase delivery pipeline 30 can be connected to the first gas phase delivery pipeline 22, and corresponding valves can be added to control the on / off state, which is convenient for layout. The inlet of the pre-storage tank 16 is connected to the top gas phase outlet of the separator 15 via a pipeline to deliver gas phase components. The pre-storage tank 16 pre-stores gas phase components for short periods to facilitate pressurization of the mixing C4 spherical tank.

[0027] The third BOG processing system includes a cooling mechanism 418, such as a condenser for butane. The shell-side inlet of the cooling mechanism 418 is connected to the liquid phase outlet at the bottom of the separator 10 via a liquid phase transport pipe 636. The tube-side inlet of the cooling mechanism 418 is connected to the gas phase outlet of the mixed C4 spherical tank 3 via a second gas phase transport pipe 23. The shell-side outlet of the cooling mechanism 418 is connected to the gas-liquid separator 7 via a pipe. The liquid phase in the separator 10 serves as the cold source for the cooling mechanism 418, thereby cooling and liquefying the gas phase components in the mixed C4 spherical tank. Afterward, the components return to the gas-liquid separator, where they are compressed, cooled, and liquefied before entering the separator. The tube-side outlet of the cooling mechanism 418 is connected to the liquid phase inlet of the mixed C4 spherical tank 3 via a liquid phase transport pipe 124. A transport pump 19 or similar device can be installed on the liquid phase transport pipe 124 to provide power.

[0028] In this example, a fuel gas buffer tank 5 and a flare lamp 6 are added. The first gas phase delivery pipeline 22 is connected to the fuel gas buffer tank 5 through a branch pipe. The fuel gas buffer tank 5 is connected to the flare lamp 6. Propane gas phase is used to replace natural gas as the flare lamp dye, which helps to reduce the pressure of the spherical tank.

[0029] In this example, the cryogenic propane tank 1 and the ambient temperature propane tank 2 are connected. The gas phase outlet of the ambient temperature propane tank 2 is connected to the gas phase inlet of the cryogenic propane tank 1 via branch pipe 20, and to the fuel gas buffer tank 5 via branch pipe 21. Branch pipe 21 can optionally share a portion of its pipe body with the first gas phase delivery pipeline 22. The ambient temperature propane tank is used to replenish the vacuum in the cryogenic propane tank and to replace nitrogen, etc.

[0030] The liquid phase outlet of the low-temperature propane tank 1 is connected to the liquid phase inlet of the ambient temperature propane tank 2 by a liquid phase transport pipeline 27. A heating mechanism 28 is installed on this pipeline to heat the liquid phase in the low-temperature propane tank to ambient temperature to replenish the ambient temperature propane tank. The heating mechanism can be purchased directly from the market as needed.

[0031] In use, transfer pumps can be added to some pipelines and branch pipes to increase power, and valves, flow meters, pressure detectors, etc. with different functions can be installed on various gas phase and liquid phase transfer pipelines and branch pipes, which will not be elaborated further. The number of spherical tanks, storage tanks, and separators can also be increased as needed, such as single or multiple units.

[0032] In use, the first BOG processing system extracts the gaseous components from the cryogenic propane tank. The gaseous components are first separated into gas and liquid phases by a gas-liquid separator. After compression and cooling, the gaseous components enter the first liquid separator. Part of the liquid in the first liquid separator enters the fourth cooling mechanism as a cold source to liquefy the gaseous components discharged from the mixed C4 spherical tank. After liquefaction, the gaseous components in the fourth cooling mechanism are transported back to the mixed C4 spherical tank. Part of the liquid phase in the first liquid separator enters the first collection tank. Part of the liquid phase in the first collection tank enters the room temperature propane storage tank for easy extraction. Part of the liquid phase in the first collection tank is used as a cold source and is cooled by a throttling valve before being transported to the shell side of the third cooling mechanism.

[0033] The second BOG processing system extracts the gaseous components from the refined C3 spherical tank, buffers them in the second collection tank, compresses and cools them, and then enters the second liquid separator. Part of the liquid phase in the second liquid separator enters the tube side of the third cooling mechanism after passing through a throttling valve. Part of the liquid phase in the first collection tank enters the tube side of the third cooling mechanism. The liquid phase in the tube side is cooled to different degrees and then transported back to the cryogenic propane tank and the refined C3 spherical tank, respectively. The components in the shell side of the third cooling mechanism are transported to the gas-liquid separator for further compression and liquefaction. The entire system saves multiple sets of compression and cooling mechanisms, significantly reducing costs.

[0034] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A novel refined C3 material storage and transportation system, comprising a refined C3 spherical tank, a mixed C4 spherical tank, an ambient temperature propane tank, and a cryogenic propane tank, wherein a first gas phase conveying pipeline is provided between the refined C3 spherical tank and the mixed C4 spherical tank, characterized in that, It also includes a first BOG processing system, a second BOG processing system, and a third BOG processing system. The first BOG processing system includes a gas-liquid separator, a compressor, a cooling mechanism, a liquid separator, and a collection tank connected in sequence. The gas-liquid separator is connected to the low-temperature propane tank to transport gaseous components, and the collection tank is connected to the ambient temperature propane tank to transport liquid components. The second BOG processing system includes a second collection tank, a second compressor, a second cooling mechanism, a second liquid separator, and a third cooling mechanism connected in sequence. The second collection tank is connected to the refined C3 spherical tank to transport gaseous components, and the collection tank is connected to the third collection tank. The cooling mechanism three is connected to the tube side and shell side of the cooling mechanism three via branch pipes, and a throttling valve is installed on the pipe connected to the shell side. The shell side of the cooling mechanism three is connected to the gas-liquid separator, and the liquid separator two is connected to the tube side of the cooling mechanism three. The cooling mechanism three is connected to the refined C3 ball tank and the low-temperature propane tank to transport liquid phase components. The third BOG processing system includes a cooling mechanism four. The inlet and outlet of the cooling mechanism four are connected to the gas phase outlet and liquid phase inlet of the mixed C4 ball tank, respectively, and the liquid separator one is connected to the cooling mechanism four to supply a cold source. The gas phase outlet of the cooling mechanism four is connected to the gas-liquid separator. It also includes a pre-storage tank, the outlet of which is connected to the collection tank 2 and the mixing C4 spherical tank respectively, and the inlet of which is connected to the separator tank 2 to transport gas phase components; The low-temperature propane tank is connected to the normal-temperature propane tank, and a heating mechanism is installed on the connecting pipeline; the fourth cooling mechanism is a condenser for butane, and the tube outlet of the fourth cooling mechanism is connected to the liquid inlet of the mixed C4 ball through the first liquid phase conveying pipeline, and a conveying pump is installed on the first liquid phase conveying pipeline.

2. The novel refined C3 material storage and transportation system as described in claim 1, characterized in that: The liquid separator is connected to the gas-liquid separator to transport the gas phase components.

3. The novel refined C3 material storage and transportation system as described in claim 1, characterized in that: The ambient temperature propane tank and the cryogenic propane tank are connected.

4. The novel refined C3 material storage and transportation system as described in claim 1, characterized in that: The ambient temperature propane tank is connected to the gas-liquid separator to transport the gas phase components.

5. The novel refined C3 material storage and transportation system as described in claim 1, characterized in that: It also includes a fuel gas buffer tank and a flare lamp. The first gas phase delivery pipeline is connected to the fuel gas buffer tank through a branch pipe, and the fuel gas buffer tank is connected to the flare lamp.

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