CN221076125U - Tank wagon tank high vacuum pumping equipment - Google Patents
Tank wagon tank high vacuum pumping equipment Download PDFInfo
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- CN221076125U CN221076125U CN202322855907.3U CN202322855907U CN221076125U CN 221076125 U CN221076125 U CN 221076125U CN 202322855907 U CN202322855907 U CN 202322855907U CN 221076125 U CN221076125 U CN 221076125U
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- tank
- pipe
- drying room
- nitrogen
- inner tank
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- 238000005086 pumping Methods 0.000 title claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 132
- 238000001035 drying Methods 0.000 claims abstract description 70
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 66
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 239000011229 interlayer Substances 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 5
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses tank car tank high vacuum equipment, which comprises a tank and a drying room; the tank box comprises an outer tank and an inner tank, and an interlayer is arranged between the inner tank and the outer tank; the drying room is provided with a drying room heating system, a vacuumizing pipeline and a nitrogen charging pipeline; the vacuumizing pipe is provided with a vacuumizing valve, and the nitrogen charging pipe is provided with a nitrogen adding valve; the vacuumizing pipeline and the nitrogen charging pipeline are jointly connected with a charging and sucking main pipe, and the charging and sucking main pipe is communicated with an interlayer of the tank; a nitrogen heater is arranged in the nitrogen charging pipeline; the drying room is provided with a closed-loop heating system, and the closed-loop heating system comprises an inner tank gas heater, a circulating pipe gas inlet pipe and a circulating pipe gas outlet pipe; the circulating air inlet pipe is communicated with the lower part in the inner tank, and the circulating air outlet pipe is communicated with the upper part in the inner tank. The operation process comprises a preparation step, a heating step, a primary vacuumizing step, a nitrogen filling step, a secondary vacuumizing step, a cyclic vacuumizing step and a vacuumizing end. The utility model has simple operation and low energy consumption, shortens the high vacuum operation time and improves the utilization rate of the drying room.
Description
Technical Field
The utility model relates to the technical field of high vacuum pumping, in particular to vacuum pumping equipment for a tank box of a low-temperature liquid tank car, and particularly relates to high vacuum pumping equipment for the tank box of the tank car.
Background
The tank box of the cryogenic liquid tank car is a pressure vessel for transporting cryogenic liquid and is generally composed of an outer tank and an inner tank installed in the outer tank, the inner tank being used for Cheng Fangdi degrees celsius liquid. An interlayer is formed between the inner tank and the outer tank, and the purpose of vacuum insulation is achieved in the interlayer through vacuumizing.
The conventional tank car tank vacuumizing process is to place the tank in a drying room, and air in the drying room is heated by an external heater and applied to an outer tank of the tank. The inner tank of the tank box is heated by introducing hot air in the drying room into the inner tank through the circulating fan, so that the temperature of gas in an interlayer between the inner tank and the outer tank is increased, volatile substances are released, nitrogen is filled in the interlayer, and the mixed gas in the interlayer is pumped out by the vacuum pump after standing and absorption. The process is repeated until the vacuum degree in the interlayer reaches the requirement. The whole high vacuum operation time of the traditional vacuumizing equipment needs about 7 days, the energy consumption is high, and the drying room utilization rate is low.
Disclosure of Invention
Aiming at the current state of the art, the utility model provides the tank car tank high vacuum equipment which has reasonable structure, saves energy consumption, is simple to operate, shortens the high vacuum operation time and improves the drying room utilization rate.
The technical scheme adopted for solving the technical problems is as follows:
Tank car tank high vacuum equipment, including the baking house used for placing tank; the tank box consists of an outer tank of the outer layer and an inner tank of the inner layer, and an interlayer is formed between the inner tank and the outer tank; the drying room is provided with a drying room heating system for circularly heating air in the drying room, a vacuumizing pipeline and a nitrogen charging pipeline; the vacuumizing pipe is provided with a vacuumizing valve, and the nitrogen charging pipe is provided with a nitrogen adding valve; the vacuumizing pipeline and the nitrogen charging pipeline are communicated with a charging and sucking main pipe through a tee joint, and the charging and sucking main pipe is communicated with an interlayer of the tank; a nitrogen heater for heating nitrogen to form high-temperature nitrogen is additionally arranged in the nitrogen charging pipeline; the drying room is provided with a closed-loop heating system for independently and circularly heating the gas in the inner tank, and the closed-loop heating system comprises an inner tank gas heater, a circulating pipe air inlet pipe connected with the air inlet end of the inner tank gas heater and a circulating pipe air outlet pipe communicated with the air outlet end of the inner tank gas heater; the circulating pipe air inlet pipe is communicated with the lower part in the inner tank, and the circulating pipe air outlet pipe is communicated with the upper part in the inner tank.
In order to optimize the technical scheme, the specific measures adopted further comprise:
A top inlet and outlet pipe is arranged at the top of the inner tank, and a circulating pipe outlet pipe is communicated into the inner tank through the top inlet and outlet pipe; the bottom of the inner tank is provided with a bottom inlet and outlet pipe, and the air inlet pipe of the circulating pipe is communicated with the inner tank through the bottom inlet and outlet pipe.
The drying room heating system comprises a drying room heater arranged outside the drying room, and a circulating air inlet pipe and a circulating air outlet pipe which are both arranged in the drying room; the air inlet end of the drying room heater is communicated with the circulating air inlet pipe through an air inlet pipe, and the air outlet end of the drying room heater is communicated with the circulating air outlet pipe through an air outlet pipe.
The circulating air inlet pipe is provided with a plurality of air inlets at equal intervals along the length direction, and the circulating air outlet pipe is provided with a plurality of air outlets at equal intervals along the length direction.
Compared with the prior art, the nitrogen heater for heating the nitrogen to 150 ℃ to form high-temperature nitrogen is additionally arranged in the nitrogen charging pipeline, so that the high-temperature nitrogen can be filled into the interlayer, the temperature of the mixed gas in the interlayer is higher, and the volatile substances in the interlayer are easier to release and absorb. More rapid release. The drying room is provided with an independent closed-loop heating system, and the closed-loop heating system is used for independently and circularly heating the gas in the inner tank, so that the temperature of the gas in the inner tank is raised to a temperature higher than that of the gas in the drying room, and the air and filled nitrogen in the interlayer are heated again through heat conduction of the inner tank and the outer tank. Because the nitrogen heater and the closed-loop heating system are additionally arranged, the temperature of the inner tank is higher, and volatile substances in the interlayer are easier to release and absorb, so that the times of standing and absorbing nitrogen are reduced, and the time of high vacuum operation is shortened. By adopting the equipment and the process, the whole high-vacuum operation time can be completed only by about 4 days, so that the energy consumption is saved, more importantly, the utilization rate of a drying room is improved, and the productivity of the equipment is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the tank of FIG. 1;
Fig. 3 is a process diagram illustrating the operation of the present utility model.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.
Fig. 1 to 3 are structural and process diagrams of the present utility model.
Wherein the reference numerals are as follows: the air inlet K1, the air outlet K2, the drying room 1, the tank box 2, the outer tank 21, the inner tank 22, the interlayer 23, the top inlet and outlet pipe 24, the bottom inlet and outlet pipe 25, the vacuumizing pipeline 3, the vacuumizing valve 31, the nitrogen charging pipeline 4, the nitrogen charging valve 41, the charging and sucking main pipe 5, the nitrogen heater 6, the closed-loop heating system 7, the inner tank gas heater 71, the circulating pipe air inlet pipe 72, the circulating pipe air outlet pipe 73, the drying room heating system 8, the drying room heater 81, the circulating air inlet pipe 82, the circulating air outlet pipe 83, the air inlet pipe 84 and the air outlet pipe 85.
As shown in fig. 1 to 2, the utility model discloses a tank car tank high-vacuum equipment, which has the advantages of short high-vacuum operation time, energy consumption saving and high drying room utilization rate compared with the traditional high-vacuum equipment. The tank car tank high vacuum equipment comprises a drying room 1 for placing a tank 2. Tank 2 is a container for storing a low-temperature liquid, and as shown in fig. 2, is composed of an outer tank 21 of an outer layer and an inner tank 22 of an inner layer, and an interlayer 23 is formed between inner tank 22 and outer tank 21. The interlayer 23 is evacuated to ensure heat insulation between the inner tank 22 and the outer tank 21. The outer tank 21 is provided with a valve joint communicated with the interlayer 23 so as to be convenient for connection and use during vacuumizing. The drying room 1 is provided with a drying room heating system 8, a vacuumizing pipeline 3 and a nitrogen charging pipeline 4. The drying room heating system 8 is used for circularly heating air in the drying room 1 to heat the outer tank 21 of the tank 2 through the drying room 1. The vacuum-pumping pipeline 3 can vacuum the interlayer 23 through a connected vacuum-pumping pump so as to ensure the heat insulation performance of the interlayer 23. In order to facilitate the control of the pipeline, a vacuumizing valve 31 for controlling the on-off of the pipeline is arranged in the vacuumizing pipeline 3. The nitrogen charging pipeline 4 is used for connecting nitrogen charging equipment to charge nitrogen into the interlayer 23 so as to absorb volatile substances in the interlayer 23 by utilizing the nitrogen, thereby improving the vacuum degree of the interlayer 23. Similarly, in order to facilitate the control of the pipeline, a nitrogen adding air valve 41 for controlling the on-off of the pipeline is arranged in the nitrogen charging pipeline 4.
The vacuumizing pipeline 3 and the nitrogen charging pipeline 4 are connected with the charging and sucking main pipe 5 through the tee joint, so that vacuumizing and nitrogen charging can be completed by using the charging and sucking main pipe 5 together. The filling and pumping main 5 is composed of a hard pipe and a spring hose, and can be conveniently connected with a valve joint of the interlayer 23 through the spring hose. The nitrogen charging pipeline 4 is additionally provided with the nitrogen heater 6, so that the nitrogen to be charged is heated to a higher temperature through the nitrogen heater 6 to form high-temperature nitrogen, and the high-temperature nitrogen can absorb volatile substances in the interlayer 23 more easily. The drying room 1 of the present utility model is also provided with a separate closed loop heating system 7. The closed loop heating system 7 is only used for the individual cyclic heating of the gas in the inner tank 22, the heating temperature of the gas in the inner tank 22 being twice the heating temperature of the gas in the drying room 1. As shown in fig. 1, the closed-loop heating system 7 includes a tank gas heater 71, a circulation pipe gas inlet pipe 72 connected to the gas inlet end of the tank gas heater 71, and a circulation pipe gas outlet pipe 73 connected to the gas outlet end of the tank gas heater 71. The inner tank gas heater 71 is used to heat the gas in the inner tank 22 cyclically. The circulation pipe air inlet pipe 72 is communicated with the lower part in the inner tank 22 so that the inner tank air heater 71 can extract the air in the inner tank 22, and the circulation pipe air outlet pipe 73 is communicated with the upper part in the inner tank 22 so as to convey the air heated by the inner tank air heater 71 into the inner tank 22.
In the embodiment, as shown in fig. 2, a top inlet and outlet pipe 24 is installed at the top of the inner tank 22, and a bottom inlet and outlet pipe 25 is installed at the bottom of the inner tank 22. The top inlet and outlet pipe 24 and the bottom inlet and outlet pipe 25 are both pipes for liquid inlet and liquid discharge installed in the tank 2. After the top inlet and outlet pipe 24 and the bottom inlet and outlet pipe 25 pass through the interlayer 23 and the outer tank 21, a joint is left at the outer end of the outer tank 21. The utility model herein makes direct use of the top inlet and outlet pipe 24 and the bottom inlet and outlet pipe 25 of the tank 2. The circulating pipe air outlet pipe 73 is communicated with the inner tank 22 through the top inlet and outlet pipe 24; the circulation pipe air intake pipe 72 is communicated with the inner tank 22 through the bottom inlet and outlet pipe 25.
In the embodiment, as shown in fig. 1, the drying room heating system 8 includes a drying room heater 81 disposed outside the drying room 1, and a circulation air inlet pipe 82 and a circulation air outlet pipe 83 both disposed in the drying room 1. The drying room heater 81 is used to extract air in the drying room 1 and heat the extracted air. The air inlet end of the drying room heater 81 is communicated with the circulating air inlet pipe 82 through an air inlet pipe 84, and the air outlet end of the drying room heater 81 is communicated with the circulating air outlet pipe 83 through an air outlet pipe 85.
In the embodiment, the circulating air inlet pipe 82 is formed with a plurality of air inlets K1 at equal intervals along the length direction, and the circulating air outlet pipe 83 is formed with a plurality of air outlets K2 at equal intervals along the length direction.
The utility model also provides an operation process of the tank car tank high-vacuum-pumping equipment, which comprises the following steps:
The preparation steps are as follows: the tank 2 to be vacuumized is sent into a drying room 1, then a filling and pumping main pipe 5 is connected with a valve joint of an interlayer 23 of the tank 2, a circulating pipe air outlet pipe 73 of a closed-loop heating system 7 is connected with a top inlet and outlet pipe 24 of the tank 2, and after a circulating pipe air inlet pipe 72 of the closed-loop heating system 7 is connected with a bottom inlet and outlet pipe 25 of the tank 2, a room door is closed;
And a heating step: setting the heating temperature of the drying room heater 81 to 145-155 ℃ and the heating temperature of the inner tank gas heater 71 to 290-310 ℃; then, the drying room heater 81 is started again, the outer tank 21 of the tank 2 is heated by circularly heating the air in the whole drying room 1, and the inner tank gas heater 71 is started at the same time, and the inner tank 22 of the tank 2 is heated by circularly heating the air in the inner tank 22; conducting heating of the air inside the interlayer 23 is performed by using the surface of the outer tank 21 and the surface of the inner tank 22;
Primary vacuumizing: after the temperature in the inner tank 22 reaches the set temperature, maintaining for a period of time, and then opening the vacuumizing valve 31 to vacuumize the interlayer 23;
And (3) nitrogen filling: when the vacuum in the interlayer 23 meets the set requirement, closing the vacuumizing valve 31, starting the nitrogen heater 6, opening the nitrogen adding valve 41, and filling high-temperature nitrogen into the interlayer 23, wherein the set temperature of the high-temperature nitrogen is 145-155 ℃;
And vacuumizing: when the filling pressure reaches the requirement, standing for a period of time, and closing the nitrogen adding valve 41; opening the vacuumizing valve 31, and vacuumizing the interlayer 23 again;
And (5) circularly vacuumizing: repeating the steps of filling nitrogen and vacuumizing again until the vacuum degree in the interlayer 23 reaches the standard of product design;
and (5) vacuumizing is finished: closing the drying room heater 81, the inner tank gas heater 71 and the nitrogen heater 6, opening the drying room 1 after the temperature in the drying room 1 is reduced, removing all pipelines connected in the preparation step, moving the tank 2 out of the drying room 1, cooling the tank 2 to normal temperature and standing for a period of time, and then re-measuring the vacuum degree of the interlayer to finish high vacuumizing operation.
Examples
The utility model relates to an operation process of tank wagon tank high vacuum-pumping equipment, which comprises the following steps:
The preparation steps are as follows: the tank 2 to be vacuumized is sent into a drying room 1, then a filling and pumping main pipe 5 is connected with a valve joint of an interlayer 23 of the tank 2, a circulating pipe air outlet pipe 73 of a closed-loop heating system 7 is connected with a top inlet and outlet pipe 24 of the tank 2, and after a circulating pipe air inlet pipe 72 of the closed-loop heating system 7 is connected with a bottom inlet and outlet pipe 25 of the tank 2, a room door is closed;
and a heating step: the heating temperature of the drying room heater 81 was set to 150 ℃ and the heating temperature of the inner tank gas heater 71 was set to 300 ℃; then, the drying room heater 81 is started again, the outer tank 21 of the tank 2 is heated by circularly heating the air in the whole drying room 1, and the inner tank gas heater 71 is started at the same time, and the inner tank 22 of the tank 2 is heated by circularly heating the air in the inner tank 22; conducting heating of the air inside the interlayer 23 is performed by using the surface of the outer tank 21 and the surface of the inner tank 22;
Primary vacuumizing: after the temperature in the inner tank 22 reached 300 ℃, maintaining for 5 hours, then opening the vacuumizing valve 31 to vacuumize the interlayer 23; before vacuum pumping, a cold well is started.
And (3) nitrogen filling: when the vacuum in the interlayer 23 meets the set requirement, closing the vacuumizing valve 31, starting the nitrogen heater 6, opening the nitrogen adding valve 41, filling high-temperature nitrogen into the interlayer 23, wherein the set temperature of the high-temperature nitrogen is 150 ℃;
And vacuumizing: when the filling pressure reaches the requirement, standing for 5 hours, and closing the nitrogen adding valve 41; opening the vacuumizing valve 31, and vacuumizing the interlayer 23 again;
And (5) circularly vacuumizing: repeating the steps of filling nitrogen and vacuumizing again until the vacuum degree in the interlayer 23 reaches the standard of product design;
And (5) vacuumizing is finished: closing the drying room heater 81, the inner tank gas heater 71 and the nitrogen heater 6, opening the drying room 1 after the temperature in the drying room 1 is reduced, removing all pipelines connected in the preparation step, moving the tank 2 out of the drying room 1, and repeating the measurement of the interlayer vacuum degree after the temperature of the tank 2 is reduced to normal temperature and the tank is kept stand for 1-2 days to finish high vacuumizing operation.
The preferred embodiments of this utility model have been described so far that various changes or modifications may be made by one of ordinary skill in the art without departing from the scope of this utility model.
Claims (4)
1. The tank car tank high vacuumizing equipment comprises a drying room (1) for placing the tank (2); the tank (2) consists of an outer tank (21) at the outer layer and an inner tank (22) at the inner layer, and an interlayer (23) is formed between the inner tank (22) and the outer tank (21); the drying room (1) is provided with a drying room heating system (8) for circularly heating air in the drying room (1), a vacuumizing pipeline (3) and a nitrogen charging pipeline (4); the vacuumizing pipeline (3) is provided with a vacuumizing valve (31), and the nitrogen filling pipeline (4) is provided with a nitrogen adding valve (41); the method is characterized in that: the vacuum pumping pipeline (3) and the nitrogen charging pipeline (4) are communicated with a suction filling pipe (5) through a tee joint, and the suction filling pipe (5) is communicated with an interlayer (23) of the tank (2); a nitrogen heater (6) for heating nitrogen to form high-temperature nitrogen is additionally arranged in the nitrogen charging pipeline (4); the drying room (1) is provided with a closed-loop heating system (7) for independently and circularly heating the gas in the inner tank (22), and the closed-loop heating system (7) comprises an inner tank gas heater (71), a circulating pipe air inlet pipe (72) connected with the air inlet end of the inner tank gas heater (71) and a circulating pipe air outlet pipe (73) communicated with the air outlet end of the inner tank gas heater (71); the circulating pipe air inlet pipe (72) is communicated with the lower part in the inner tank (22), and the circulating pipe air outlet pipe (73) is communicated with the upper part in the inner tank (22).
2. The tank car tank high vacuum apparatus of claim 1, wherein: a top inlet and outlet pipe (24) is arranged at the top of the inner tank (22), and the circulating pipe outlet pipe (73) is communicated into the inner tank (22) through the top inlet and outlet pipe (24); the bottom of the inner tank (22) is provided with a bottom inlet and outlet pipe (25), and the circulating pipe air inlet pipe (72) is communicated with the inner tank (22) through the bottom inlet and outlet pipe (25).
3. The tank car tank high vacuum apparatus of claim 2, wherein: the drying room heating system (8) comprises a drying room heater (81) arranged outside the drying room (1), and a circulating air inlet pipe (82) and a circulating air outlet pipe (83) which are all arranged in the drying room (1); the air inlet end of the drying room heater (81) is communicated with the circulating air inlet pipe (82) through an air inlet pipe (84), and the air outlet end of the drying room heater (81) is communicated with the circulating air outlet pipe (83) through an air outlet pipe (85).
4. A tank car tank high vacuum apparatus according to claim 3, characterized in that: a plurality of air inlets (K1) are formed in the circulating air inlet pipe (82) at equal intervals along the length direction, and a plurality of air outlets (K2) are formed in the circulating air outlet pipe (83) at equal intervals along the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322855907.3U CN221076125U (en) | 2023-10-24 | 2023-10-24 | Tank wagon tank high vacuum pumping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322855907.3U CN221076125U (en) | 2023-10-24 | 2023-10-24 | Tank wagon tank high vacuum pumping equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221076125U true CN221076125U (en) | 2024-06-04 |
Family
ID=91272834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322855907.3U Active CN221076125U (en) | 2023-10-24 | 2023-10-24 | Tank wagon tank high vacuum pumping equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221076125U (en) |
-
2023
- 2023-10-24 CN CN202322855907.3U patent/CN221076125U/en active Active
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