Normal-temperature unloading system and unloading method for high-temperature superhigh-pressure container

Abstract

The application discloses a normal-temperature unloading system and method of high-temperature super-high-pressure container, and relates to the field of pressure container unloading. The system comprises a high-temperature oil tank for storing high-temperature oil and a normal-temperature oil tank for storing normal-temperature oil. The high-temperature oil tank is connected with the oil injection / outlet of the high-temperature container through a high-temperature oil charging and discharging pump group. The oil outlet of the high-temperature container is connected with the normal-temperature container through an oil conveying pipe. A cooler for cooling the high-temperature oil is arranged on the oil conveying pipe. The pressure relief port of the normal-temperature container is connected with the normal-temperature oil tank through a pressure relief pipe. The high-temperature oil in the high-temperature container is cooled to normal-temperature oil by the cooler and stored in the normal-temperature container. The normal-temperature container is relieved through the pressure relief pipe connected with the normal-temperature container. Since the high-temperature container is connected with the normal-temperature container and the pressure is equivalent, the high-temperature container is relieved. The application can effectively control the pressure in the high-temperature super-high-pressure container and measure the data. The high-temperature oil is effectively converted into normal-temperature oil and unloaded.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel unloading, and in particular to a normal temperature unloading system and method for a high-temperature and ultra-high-pressure vessel. Background Technology

[0002] For isostatic presses used in high-temperature and ultra-high-pressure environments, corresponding unloading valves and relief valves are usually installed in their hydraulic systems to ensure the stability and reliability of the hydraulic system. In this environment where high temperature and ultra-high pressure coexist, the temperature can reach 150℃-200℃ and the pressure can reach more than 600MPa. If unloading is performed directly in this environment, the performance requirements for the unloading valve are very high. However, conventional valves on the market are difficult to meet the requirements of this environment. Even if some valves can meet the requirements, their service life is short under such conditions. Therefore, there are two ways to solve this problem. One is to research new valves to meet the application requirements of this high-temperature and ultra-high-pressure environment. However, researching and customizing valves adapted to this working environment faces high technical barriers and high R&D and purchase costs. The second approach is to research new hydraulic systems.

[0003] Meanwhile, because the medium inside high-temperature and ultra-high-pressure containers is in a high-temperature state, many measuring components (such as pressure gauges and oil-water measuring instruments) cannot be used effectively. Therefore, in order to solve the above problems, a new hydraulic unloading system needs to be developed for containers used in high-temperature and ultra-high-pressure environments. Summary of the Invention

[0004] The purpose of this invention is to provide a room-temperature unloading system and method for high-temperature and ultra-high-pressure containers, which can effectively control the pressure inside the container and measure the data, and effectively convert the high-temperature oil to room temperature for unloading, in order to address the problems mentioned above.

[0005] The technical solution adopted in this invention is as follows: a normal temperature unloading system for a high-temperature and ultra-high pressure vessel, comprising a high-temperature oil tank for storing high-temperature oil and a normal temperature oil tank for storing normal temperature oil. The high-temperature oil tank is connected to the oil injection / discharge port of the high-temperature vessel through a high-temperature charging and discharging pump set. The oil outlet of the high-temperature vessel is connected to the normal temperature vessel through an oil delivery pipe. A cooler for cooling the high-temperature oil is provided on the oil delivery pipe. The pressure relief port of the normal temperature vessel is connected to the normal temperature oil tank through a pressure relief pipe.

[0006] Furthermore, the oil pipeline has a serpentine cooling section that passes through the cooler or is arranged next to the cooler.

[0007] Furthermore, the high-temperature container has a high-temperature overflow port, which is connected to the high-temperature oil tank through an overflow valve assembly.

[0008] Furthermore, the ambient temperature container has an ambient temperature overflow port, which is connected to the ambient temperature oil tank via an overflow valve assembly.

[0009] Furthermore, the overflow valve assembly includes a first pneumatic shut-off valve and a floating switch. Along the flow direction of the fluid, the first pneumatic shut-off valve and the floating switch are arranged in sequence, and the floating switch is linked with the first pneumatic shut-off valve. A vent valve is provided between the floating switch and the first pneumatic shut-off valve.

[0010] Furthermore, along the flow direction of the fluid, a primary unloading valve and a pneumatic unloading valve are sequentially installed on the pressure relief pipeline; the primary unloading valve is a normally open valve; and the pneumatic unloading valve is a normally closed valve.

[0011] Furthermore, the oil inlet of the high-temperature container is also connected to a hydraulic booster system. This hydraulic booster system includes a drive hydraulic cylinder and a booster cylinder fixedly and sealed at both ends of the drive hydraulic cylinder. The drive hydraulic cylinder has a drive piston, and piston rods are provided on both sides of the drive piston. One end of the piston rod is located inside the booster cylinder and connected to the booster piston. The drive piston divides the drive hydraulic cylinder into two chambers. The oil ports of both chambers are connected to the oil outlet of a reversing valve. The oil inlet of the reversing valve is connected to a normal temperature oil tank through a drive pump, and a proportional relief valve is provided between the oil inlet of the reversing valve and the drive pump. The oil return port of the reversing valve is connected to the normal temperature oil tank. The oil ports of the booster cylinder are all connected to the high-temperature oil tank through check valves, so that the oil inlet of the booster cylinder can only be obtained from the high-temperature oil tank. The oil ports of the booster cylinder are all connected to the oil inlet of the high-temperature container through check valves, so that the oil outlet of the booster cylinder can only enter the high-temperature container.

[0012] Furthermore, the radial cross-sectional area of ​​the drive piston is larger than that of the booster piston.

[0013] Furthermore, the oil inlet / outlet of the ambient temperature container is also connected to the ambient temperature oil tank via a second pneumatic shut-off valve and an ambient temperature supply pump group.

[0014] A method for unloading a high-temperature and ultra-high-pressure vessel at room temperature involves adding a room-temperature vessel, connecting the oil outlet of the high-temperature vessel to the oil inlet of the room-temperature vessel, adding a cooler to the pipeline connecting the room-temperature and high-temperature vessels, and relocating the pressure relief pipeline of the high-temperature vessel to the atmospheric pressure vessel. The cooler cools the high-temperature oil in the high-temperature vessel to room temperature and stores it in the room-temperature vessel. Pressure is then released from the room-temperature vessel through the pressure relief pipeline connected to it. Since the high-temperature vessel and the room-temperature vessel are connected and have equal pressure, pressure relief is achieved in the high-temperature vessel.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] This invention adds a room-temperature container and a cooler, connecting the room-temperature container to a high-temperature container. The cooler cools the high-temperature oil, effectively equivaling the non-temperature physical parameters (such as pressure) of the high-temperature oil in the high-temperature container to the non-temperature physical parameters of the room-temperature oil in the room-temperature tank. On the one hand, it effectively allows the installation of measuring instruments for non-temperature physical parameters on the room-temperature container to measure the non-temperature physical parameters of the high-temperature oil; on the other hand, it achieves the purpose of depressurizing the high-temperature container by depressurizing the room-temperature container, thereby reducing the requirements for the unloading valve and enabling the use of lower-performance unloading valves. Attached Figure Description

[0017] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the system structure;

[0019] Figure 2 This is a schematic diagram showing the location distribution of the cooler and cooling section;

[0020] The diagram shows the following markings: 1-Ambient temperature oil tank; 2-High temperature oil tank; 3-High temperature charging / discharging pump assembly; 4-Hydraulic booster system; 41-Drive piston; 42-Boosting cylinder; 43-Drive hydraulic cylinder; 44-Boosting piston; 45-Check valve; 46-Filter; 471-Boosting pump; 472-Drive pump; 48-Proportional relief valve; 49-Directional control valve; 5-Ambient temperature charging / discharging pump assembly; 6-High temperature container; 61-High temperature overflow port; 7-First pneumatic shut-off valve; 8-Vent valve; 9-Floating switch; 10-Temperature sensor; 11-Cooler; 12-Oil delivery pipe; 121-Cooling section; 13-Ambient temperature container; 131-Ambient temperature overflow port; 14-Pressure gauge; 15-First stage unloading valve; 16-Pneumatic unloading valve. Detailed Implementation

[0021] In the description of this specification, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0022] Furthermore, the use of terms such as "horizontal" or "vertical" in this specification does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this specification, it should also be noted that, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” should be interpreted broadly. For example, a link can be a fixed link, a detachable link, or an integral link; it can be a mechanical link or an electrical link; it can be a direct link or an indirect link through an intermediate medium; it can be a connection within two components.

[0024] Example 1

[0025] like Figures 1-2 As shown, a normal temperature unloading system for a high-temperature and ultra-high-pressure vessel includes a high-temperature oil tank 2 for storing high-temperature oil and a normal temperature oil tank 1 for storing normal temperature oil. The high-temperature oil tank 2 is connected to the oil injection / discharge port of the high-temperature vessel 6 via a high-temperature charging / discharging oil pump set 3. The oil outlet of the high-temperature vessel 6 is connected to the normal temperature vessel 13 via an oil delivery pipe 12. A cooler 11 for cooling the high-temperature oil is installed on the oil delivery pipe 12. The pressure relief port of the normal temperature vessel 13 is connected to the normal temperature oil tank 1 via a pressure relief pipe.

[0026] In this embodiment, as described in the background art, the temperature of the high-temperature oil is between 150°C and 200°C, while the temperature of the normal-temperature oil is at room temperature. The cooler 11 is actually a heat exchanger, which can be a surface heat exchanger. That is, the oil pipe 12 passes through the surface heat exchanger, and the cold flow medium flows on the outer surface of the surface heat exchanger and the oil pipe 12, realizing heat exchange between the cold flow medium and the high-temperature oil in the oil pipe 12, taking away the heat of the high-temperature oil, thereby converting the high-temperature oil into normal-temperature oil and supplying it to the normal-temperature oil tank 1.

[0027] In this embodiment, a room temperature container 13 and a cooler 11 are added. The room temperature container 13 is connected to the high temperature container 6, and the cooler 11 cools the high temperature oil. This effectively converts the non-temperature physical parameters (such as pressure) of the high temperature oil in the high temperature container 6 to the non-temperature physical parameters of the room temperature oil in the room temperature oil tank 1. On the one hand, this effectively allows the installation of non-temperature physical parameter measuring instruments on the room temperature container 13 to measure the non-temperature physical parameters of the high temperature oil. On the other hand, by depressurizing the room temperature container 13, the high temperature container 6 can be depressurized, thereby reducing the requirements for the unloading valve and enabling the use of lower-performance unloading valves. Thus, non-temperature measuring instruments such as pressure gauges 14 can be installed on the room temperature container 13.

[0028] In this embodiment, if the oil stored in the ambient temperature container 13 and the high temperature container 6 is high-pressure oil, the pressure can be released through the pressure relief port on the ambient temperature container 13 to convert the high-pressure oil in the ambient temperature container 13 and the high temperature container 6 into atmospheric pressure oil. Then, the liquid oil in the high temperature container 6 can be completely discharged through the oil injection / drainage port of the high temperature container 6.

[0029] Furthermore, temperature sensors 10 are installed on both the ambient temperature container 13 and the high temperature container 6 to obtain the liquid oil temperature inside the ambient temperature container 13 and the high temperature container 6, respectively.

[0030] Example 2

[0031] Based on Example 1, further feasible implementation methods are proposed.

[0032] like Figure 2 As shown, in one feasible implementation, the oil pipeline 12 has a serpentine cooling section 121. The cooling section 121 passes through the cooler 11 or is arranged next to the cooler 11. The serpentine cooling section 121 can arrange a pipe with a longer axial length in a limited space, thereby ensuring that the high-temperature oil can be completely cooled to room temperature, and that the liquid oil with a gradually changing temperature has sufficient length of cooling section 121 to accommodate it, so that the liquid oils with different temperatures on both sides of the cooling section 121 are independent of each other.

[0033] In one feasible implementation, the high-temperature container 6 has a high-temperature overflow port 61, which is connected to the high-temperature oil tank 2 via an overflow valve assembly. When the high-temperature container 6 is filled with oil, the overflow valve assembly at the high-temperature overflow port 61 is in the open state, so that the gas in the high-temperature container 6 can be discharged after passing through the high-temperature overflow port 61 and the overflow valve assembly during filling. As the liquid oil level in the high-temperature container 6 gradually rises, after the liquid oil fills the high-temperature container 6, it is discharged through the high-temperature overflow port 61 and the overflow valve assembly. The overflow valve assembly includes a first pneumatic shut-off valve 7 and a floating switch 9. The liquid oil flows through the floating switch 9 on the pipeline, causing the float to rise and triggering a valve closing signal. Closing the first pneumatic shut-off valve 7 confirms that the high-temperature container 6 has been filled.

[0034] In one feasible implementation, the ambient temperature container 13 has an ambient temperature overflow port 131, which is connected to the ambient temperature oil tank 1 via an overflow valve assembly. Similarly, when filling the ambient temperature container 13 with oil, the overflow valve assembly at the ambient temperature overflow port 131 is in the open state, so that the gas in the ambient temperature container 13 can be discharged after passing through the ambient temperature overflow port 131 and the overflow valve assembly during filling. As the liquid oil level in the ambient temperature container 13 gradually rises, after the liquid oil fills the ambient temperature container 13, it is discharged from the ambient temperature overflow port 131 and the overflow valve assembly. The overflow valve assembly includes a first pneumatic shut-off valve 7 and a floating switch 9. The liquid oil flows through the floating switch 9 on the pipeline, causing the float to rise and triggering a valve closing signal. Closing the first pneumatic shut-off valve 7 can confirm that the ambient temperature container 13 has been filled.

[0035] It should be noted that a manual shut-off valve is installed between the high-temperature container 6 and the ambient temperature container 13. During normal operation of the entire ambient temperature unloading system, the manual shut-off valve is normally open to ensure that the non-temperature physical parameters (such as pressure) of the liquid oil in the high-temperature container 6 and the ambient temperature container 13 are consistent. However, in some special cases, such as when the temperature in the ambient temperature container 13 rises due to repeated compression of the liquid oil, it is necessary to replace the liquid oil in the ambient temperature container 13. In such cases, the manual shut-off valve needs to be manually closed to prevent the liquid oil in the high-temperature container 6 from entering the ambient temperature container 13. In step 3, the pumping speed of the liquid oil in the ambient temperature container 13 is affected. After the liquid oil in the ambient temperature container 13 is discharged to a certain extent or completely pumped out, the manual shut-off valve can be opened to allow the liquid oil in the high temperature container 6 to replenish the liquid oil in the ambient temperature container 13. Alternatively, the liquid oil in the ambient temperature container 13 can be directly charged and discharged by the ambient temperature charging and discharging pump group 5 mentioned later to replace the liquid oil in the ambient temperature container 13. Or, when the high temperature container 6 is draining oil, the manual shut-off valve can be closed to prevent the liquid oil in the ambient temperature container 13 from flowing back into the high temperature container 6.

[0036] In fact, the room temperature container 13 needs to be installed higher than the high temperature container 6 in terms of space, so that the liquid oil fills the high temperature container 6 first, and then fills the room temperature container 13; in this installation state, the cooler 11 can be turned on after the high temperature container 6 is full.

[0037] Of course, based on actual operation, the liquid oil will only flow from the high-temperature container 6 to the room-temperature container 13. When replacing the liquid oil in the room-temperature container 13, without considering the pumping speed of the liquid oil in the room-temperature container 13, the manual shut-off valve between the high-temperature container 6 and the room-temperature container 13 can be replaced with a one-way valve. This one-way valve only allows the liquid oil in the high-temperature container 6 to flow into the room-temperature container 13, thus preventing the liquid oil in the room-temperature container 13 from flowing back into the high-temperature container 6 when the high-temperature container 6 is draining oil.

[0038] Furthermore, as can be seen from the above, it is necessary to set a high-temperature overflow port 61 for the high-temperature container 6 and a normal-temperature overflow port 131 for the normal-temperature container 13. Regardless of the arrangement, it is necessary to judge whether they are full. Setting only one overflow port for the two containers cannot ensure the stability of both containers being full.

[0039] To further clarify, during the pressurization stage of the high-temperature container 6 and / or the ambient temperature container 13, the overflow valve assembly at the high-temperature overflow port 61 of the high-temperature container 6 and the ambient temperature overflow port 131 of the ambient temperature container 13 needs to be kept closed.

[0040] Furthermore, the overflow valve assembly includes a first pneumatic shut-off valve 7 and a floating switch 9. Along the fluid flow direction, the first pneumatic shut-off valve 7 and the floating switch 9 are arranged sequentially, and the floating switch 9 is linked to the first pneumatic shut-off valve 7. A vent valve 8 is provided between the floating switch 9 and the first pneumatic shut-off valve 7. Wherein:

[0041] Gas is discharged to the air through vent valve 8; when the air is exhausted, the liquid oil cannot be discharged from vent valve 8, but can only pass through floating switch 9. The float in floating switch 9 rises and triggers an action signal, and the first pneumatic shut-off valve 7 is closed, thereby closing the corresponding overflow port (high temperature overflow port 61 or normal temperature overflow port 131).

[0042] In one feasible implementation, a primary unloading valve 15 and a pneumatic unloading valve 16 are sequentially installed along the fluid flow direction on the pressure relief pipeline. The primary unloading valve 15 is a normally open valve and is manually operated; the pneumatic unloading valve 16 is a normally closed valve and can be remotely controlled. The two-stage valve configuration for unloading aims to avoid excessive pressure differences between the inlet and outlet of each valve, preventing valve damage. Specifically, by controlling the opening of the primary unloading valve 15 to a smaller extent (controlling the flow area of ​​the primary unloading valve 15 to be smaller than the cross-sectional area of ​​the pipeline), the pressure at the inlet and outlet of the primary unloading valve 15, or the inlet and outlet of the pneumatic unloading valve 16, gradually decreases, reducing the possibility of valve damage due to excessive pressure differences. Furthermore, if the pneumatic unloading valve 16 malfunctions, the primary unloading valve 15, as a manual valve, can be closed in an emergency.

[0043] In one feasible implementation, the oil inlet of the high-temperature container 6 is also connected to a hydraulic booster system 4. This hydraulic booster system 4 includes a drive hydraulic cylinder 43 and a booster cylinder 42 fixedly and sealed at both ends of the drive hydraulic cylinder 43. The drive hydraulic cylinder 43 has a drive piston 41, with piston rods on both sides of the drive piston 41. One end of each piston rod is located inside the booster cylinder 42 and connected to a booster piston 44. The drive piston 41 divides the drive hydraulic cylinder 43 into two chambers, and the oil ports of both chambers are connected to the oil outlet of a reversing valve 49. The reversing valve 49... The oil inlet is connected to the ambient temperature oil tank 1 via the drive pump 472, and a proportional relief valve 48 is installed between the oil inlet of the reversing valve 49 and the drive pump 472; the oil return port of the reversing valve 49 is connected to the ambient temperature oil tank 1; the oil port of the booster cylinder 42 is connected to the high temperature oil tank 2 via the check valve 45, the filter 46, and the booster pump 471, so that the oil inlet of the booster cylinder 42 can only be obtained from the high temperature oil tank 2; and the oil port of the booster cylinder 42 is connected to the oil inlet of the high temperature container 6 via the check valve 45, so that the oil outlet of the booster cylinder 42 can only enter the high temperature container 6. The boosting working principle of this hydraulic booster system can be compared with the "Hydraulically Driven Gas Compressor" disclosed in Chinese Patent Publication No. "CN202360325U", and will not be described in detail in this specification.

[0044] However, it is important to emphasize that, in this embodiment, the difference from the Chinese patent with publication number "CN202360325U" lies in the fact that a proportional relief valve 48 is provided between the oil inlet of the reversing valve 49 and the drive pump 472. The performance of the proportional relief valve 48 is significantly affected by temperature. Placing it at the outlet of the drive pump 472, which is connected to the ambient temperature oil tank 1, ensures that the temperature of the oil passing through the proportional relief valve 48 is not high, thus guaranteeing the service life of the proportional relief valve 48. Furthermore, by adjusting the overflow pressure of the proportional relief valve 48, the oil pressure in the high-temperature container 6 and the ambient temperature container 13 can be precisely controlled. Specifically, if the overflow pressure of the proportional relief valve 48 is adjusted to 'a', the corresponding oil pressure in the high-temperature container 6 and the ambient temperature container 13 is 'b'. When the oil pressure is less than b, the pressure of the oil pump 472 pumping the oil does not need to reach a to move the drive piston 41 and the booster piston 44, thereby pushing the high-temperature oil into the high-temperature container 6. At this time, the proportional relief valve 48 will not overflow. When the oil pressure in the high-temperature container 6 and the ambient temperature container 13 reaches b, the pressure of the oil pumped by the drive pump 472 needs to reach a, or even be no less than a, to move the drive piston 41 and the booster piston 44. The overflow pressure of the proportional relief valve 48 is a. Therefore, the oil pumped by the drive pump 472 will overflow from the proportional relief valve 48, and the high-temperature container 6 will no longer receive oil. This prevents the oil pressure in the high-temperature container 6 and the ambient temperature container 13 from increasing, thereby achieving precise control of the oil pressure in the high-temperature container 6 and the ambient temperature container 13.

[0045] Furthermore, the radial cross-sectional area of ​​the drive piston 41 is larger than that of the booster piston 44, changing the pressure-bearing area. This allows the proportional relief valve 48 to achieve ultra-high pressure regulation of 600MPa even when the overflow pressure is relatively low, thereby reducing the requirements on the proportional relief valve 48 and enabling the conventional proportional relief valve 48 to also meet the control requirements.

[0046] Furthermore, the ambient temperature container 13 is also independently equipped with an oil inlet / outlet. The ambient temperature container 13 is connected to the ambient temperature oil tank 1 through the oil inlet / outlet, the second pneumatic shut-off valve, and the ambient temperature charging and discharging oil pump group 5, so that the ambient temperature container 13 can be supplied with oil and drained independently.

[0047] It should be noted that, in the case described above where "the temperature inside the room temperature container 13 rises due to repeated compression of the liquid oil, and the liquid oil inside the room temperature container 13 needs to be replaced", the room temperature filling and discharging oil pump set 5 can be used to drain the liquid oil inside the room temperature container 13 through the filling / draining port; if there is a one-way valve between the high temperature container 6 and the room temperature container 13, the room temperature container 13 / high temperature container 6 can be depressurized to normal pressure in advance before the liquid oil is replaced.

[0048] Example 3

[0049] A method for unloading a high-temperature and ultra-high-pressure vessel at room temperature involves adding a room-temperature vessel 13, connecting the oil outlet of the high-temperature vessel 6 to the oil inlet of the room-temperature vessel 13, adding a cooler 11 to the pipeline connecting the room-temperature vessel 13 and the high-temperature vessel 6, and relocating the pressure relief pipeline of the high-temperature vessel 6 to the atmospheric pressure vessel. The high-temperature oil in the high-temperature vessel 6 is cooled to room temperature by the cooler 11 and stored in the room-temperature vessel 13. The pressure relief pipeline connected to the room-temperature vessel 13 is used to relieve pressure. Since the high-temperature vessel 6 and the room-temperature vessel 13 are connected and have equal pressure, the high-temperature vessel 6 is thus depressurized.

[0050] In this embodiment, the ambient temperature unloading method can be applied to the ambient temperature unloading system of the high temperature and ultra-high pressure vessel described in any one of the embodiments of Examples 1-2.

[0051] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A normal-temperature unloading system for a high-temperature and ultra-high-pressure vessel, characterized in that: It includes a high-temperature oil tank (2) for storing high-temperature oil and a normal-temperature oil tank (1) for storing normal-temperature oil. The high-temperature oil tank (2) is connected to the oil inlet / outlet of the high-temperature container (6) through a high-temperature oil filling and discharging pump group (3). The oil outlet of the high-temperature container (6) is connected to the normal-temperature container (13) through an oil delivery pipe (12). A cooler (11) for cooling the high-temperature oil is provided on the oil delivery pipe (12). The pressure relief port of the normal-temperature container (13) is connected to the normal-temperature oil tank (1) through a pressure relief pipe. Along the flow direction of the fluid, a primary unloading valve (15) and a pneumatic unloading valve (16) are sequentially installed on the pressure relief pipeline; the primary unloading valve (15) is a normally open valve; the pneumatic unloading valve (16) is a normally closed valve. The installation position of the ambient temperature container (13) is higher than that of the high temperature container (6) in space. A one-way valve is provided between the high-temperature container (6) and the room-temperature container (13). This one-way valve only allows the liquid oil in the high-temperature container (6) to flow into the room-temperature container (13).

2. The ambient temperature unloading system according to claim 1, characterized in that: The oil pipeline (12) has a serpentine cooling section (121) that passes through the cooler (11) or is arranged next to the cooler (121).

3. The ambient temperature unloading system according to claim 1, characterized in that: The high-temperature container (6) has a high-temperature overflow port (61), which is connected to the high-temperature oil tank (2) through an overflow valve assembly.

4. The ambient temperature unloading system according to claim 1, characterized in that: The ambient temperature container (13) has an ambient temperature overflow port (131), which is connected to the ambient temperature oil tank (1) through an overflow valve group.

5. The ambient temperature unloading system according to any one of claims 3-4, characterized in that: The overflow valve group includes a first pneumatic shut-off valve (7) and a floating switch (9). Along the flow direction of the fluid, the first pneumatic shut-off valve (7) and the floating switch (9) are arranged in sequence, and the floating switch (9) is linked with the first pneumatic shut-off valve (7). A vent valve (8) is provided between the floating switch (9) and the first pneumatic shut-off valve (7).

6. The ambient temperature unloading system according to claim 1, characterized in that: The oil inlet of the high-temperature container (6) is also connected to a hydraulic booster system (4). The hydraulic booster system (4) includes a driving hydraulic cylinder (43) and a booster cylinder (42) fixedly and sealed at both ends of the driving hydraulic cylinder (43). The driving hydraulic cylinder (43) has a driving piston (41). Piston rods are provided on both sides of the driving piston (41). One end of the piston rod is located in the booster cylinder (42) and connected to a booster piston (44). The driving piston (41) divides the driving hydraulic cylinder (43) into two chambers. The oil ports of the two chambers are connected to the oil outlet of the reversing valve (49). The reversing valve (49) The oil inlet is connected to the ambient temperature oil tank (1) via the drive pump (472), and a proportional relief valve (48) is provided between the oil inlet of the reversing valve (49) and the drive pump (472); the oil return port of the reversing valve (49) is connected to the ambient temperature oil tank (1); the oil port of the booster cylinder (42) is connected to the high temperature oil tank (2) via the check valve (45), so that the oil inlet of the booster cylinder (42) can only be obtained from the high temperature oil tank (2); and the oil port of the booster cylinder (42) is connected to the oil inlet of the high temperature container (6) via the check valve (45), so that the oil outlet of the booster cylinder (42) can only enter the high temperature container (6).

7. The ambient temperature unloading system according to claim 6, characterized in that: The radial cross-sectional area of ​​the drive piston (41) is greater than that of the booster piston (44).

8. The ambient temperature unloading system according to claim 1, characterized in that: The oil inlet / outlet of the ambient temperature container (13) is also connected to the ambient temperature oil tank (1) through the second pneumatic shut-off valve and the ambient temperature charging and discharging pump group (5).

9. A method for unloading a high-temperature and ultra-high-pressure vessel at room temperature, using the room-temperature unloading system for high-temperature and ultra-high-pressure vessels as described in any one of claims 1-8, characterized in that: A room temperature container (13) is added, and the oil outlet of the high temperature container (6) is connected to the oil inlet of the room temperature container (13). A cooler (11) is added to the pipeline connecting the room temperature container (13) and the high temperature container (6), and the pressure relief pipeline of the high temperature container (6) is moved to the atmospheric pressure container. The high temperature oil in the high temperature container (6) is cooled to room temperature oil by the cooler (11) and stored in the room temperature container (13). The pressure relief pipeline connected to the room temperature container (13) is used to relieve the pressure of the room temperature container (13). Since the high temperature container (6) and the room temperature container (13) are connected, the pressure is equal, thereby relieving the pressure of the high temperature container (6).

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