CN215427388U - Low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device - Google Patents
Low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device Download PDFInfo
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- CN215427388U CN215427388U CN202121447686.0U CN202121447686U CN215427388U CN 215427388 U CN215427388 U CN 215427388U CN 202121447686 U CN202121447686 U CN 202121447686U CN 215427388 U CN215427388 U CN 215427388U
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Abstract
The utility model discloses a low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device which comprises a tank body, wherein a support rod is fixedly connected to the upper surface of the tank body, a cross rod is fixedly connected to the right surface of the support rod, a second telescopic rod is fixedly connected to the lower surface of the cross rod, the output end of the second telescopic rod extends into the tank body, a sleeve is fixedly connected to the outer surface of the second telescopic rod, and a lifting head is slidably connected to the inner surface of the sleeve. According to the utility model, by designing the lifting head, the telescopic rod and the electromagnetic valve, the purpose that the pressure in the tank body is prevented from being rapidly reduced and the vaporization speed is prevented from being accelerated when the device recovers nitrogen is realized, by designing the second electromagnetic valve, the third electromagnetic valve and the pressure valve, the nitrogen moves up and down through the partition plate, the pressure above and below the tank body is controlled without other power, the liquefaction efficiency is increased, and by designing the third electromagnetic valve and the partition plate, the pressure range in the tank body is wider.
Description
Technical Field
The utility model relates to the field of gas recovery devices, in particular to a low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device.
Background
After liquid nitrogen products produced by the steel-making oxygen-making plant through air separation are sent into the low-temperature normal-pressure liquid nitrogen storage tank, although the low-temperature storage tank is insulated by adopting low-temperature expanded perlite, the low-temperature normal-pressure liquid nitrogen storage tank is low in pressure and limited in heat insulation effect due to external heat transfer, a partial liquid nitrogen gasification phenomenon still exists, the vaporization emptying rate is designed to be 2.7 per thousand, and the pressure of the low-temperature normal-pressure liquid nitrogen storage tank is low and is only 40 kPa. The nitrogen gas discharged from the storage tank is not recycled, and the vaporized nitrogen gas is completely and directly discharged. Because the pressure of the low-temperature liquid nitrogen storage tank is not high, most low-temperature liquid nitrogen storage tanks are designed with certain gasification emptying nitrogen which has the characteristics of cleanness, dryness (dew point is about minus 190 ℃) and the like, but the gasification nitrogen is difficult to recover, so that common manufacturers can directly empty the gasification nitrogen. The daily gasification rate of the large normal-pressure liquid nitrogen storage tank is about 0.27 percent.
1. The existing low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device is influenced by pressure, so that the recovery efficiency is poor;
2. at present, the low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device can affect the vaporization of liquid nitrogen gas due to the liquefaction of the nitrogen gas, so that the workload of gas recovery is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a device for recovering evaporation diffused gas of a low-temperature normal-pressure liquid nitrogen storage tank.
In order to achieve the purpose, the utility model adopts the following technical scheme: a recovery device for evaporation and diffusion gas of a low-temperature normal-pressure liquid nitrogen storage tank comprises a tank body, wherein a support rod is fixedly connected to the upper surface of the tank body, a cross rod is fixedly connected to the right surface of the support rod, a second telescopic rod is fixedly connected to the lower surface of the cross rod, the output end of the second telescopic rod extends into the tank body, a sleeve is fixedly connected to the outer surface of the second telescopic rod, and a lifting head is slidably connected to the inner surface of the sleeve;
the right fixed surface of the tank body is connected with an air duct, the internal surface of the air duct is fixedly connected with a second solenoid valve, the lower surface of the air duct is fixedly connected with a third solenoid valve, the lower surface of the air duct is located at the lower surface of the second solenoid valve, the right fixed surface of the air duct is connected with a box body, the top inner wall of the box body is fixedly connected with a first telescopic rod, the output end of the first telescopic rod is fixedly connected with a partition plate, and the upper surface of the partition plate is fixedly connected with a pressure valve.
As a further description of the above technical solution:
the lower fixed surface of the tank body is fixedly connected with supporting legs, and the number of the supporting legs is a plurality of and is evenly distributed.
As a further description of the above technical solution:
the upper surface of the lifting head is fixedly connected with the output end of the second telescopic rod, and a sealing ring is arranged between the lifting head and the sleeve.
As a further description of the above technical solution:
the second electromagnetic valve and the third electromagnetic valve are both in a one-way type, and a partition plate is arranged between the second electromagnetic valve and the third electromagnetic valve.
As a further description of the above technical solution:
the left surface of the box body is fixedly connected with a return pipe, and the inner surface of the return pipe is fixedly connected with a first electromagnetic valve.
As a further description of the above technical solution:
the left fixed surface of the jar body is connected with the inlet pipe, the lower fixed surface of the jar body is connected with the outlet pipe.
As a further description of the above technical solution:
the output end of the return pipe extends to the interior of the outlet pipe.
As a further description of the above technical solution:
the lower surface and the supporting leg fixed connection of box, the inside packing of jar body has liquid.
The utility model has the following beneficial effects:
1. compared with the prior art, the low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device has the advantages that by designing the lifting head, the telescopic rod and the electromagnetic valve, the pressure in the tank body is prevented from dropping sharply when the device recovers nitrogen, and the purpose of accelerating the vaporization speed is avoided.
2. Compared with the prior art, the recovery device for the evaporated and diffused gas in the low-temperature normal-pressure liquid nitrogen storage tank has the advantages that through the design of the second electromagnetic valve, the third electromagnetic valve and the pressure valve, nitrogen gas moves up and down through the partition plate, the pressure above and below the tank body is controlled without other power, and the liquefaction efficiency is increased.
3. Compared with the prior art, the low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device realizes a larger pressure range in the tank body by designing the third electromagnetic valve and the partition plate.
Drawings
FIG. 1 is a schematic view of the internal structure of a low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device provided by the utility model;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a top view of an evaporative emission gas recovery unit for a cryogenic normal pressure liquid nitrogen storage tank according to the present invention;
FIG. 4 is a schematic view of the overall structure of a low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device provided by the utility model.
Illustration of the drawings:
1. a tank body; 2. a feed pipe; 3. supporting legs; 4. a liquid; 5. an outflow tube; 6. a return pipe; 7. a first solenoid valve; 8. a box body; 9. a pressure valve; 10. a partition plate; 11. a first telescopic rod; 12. a support bar; 13. a cross bar; 14. a second telescopic rod; 15. a lifting head; 16. a sleeve; 17. a seal ring; 18. an air duct; 19. a second solenoid valve; 20. and a third solenoid valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, the utility model provides a low-temperature normal-pressure liquid nitrogen storage tank evaporation diffusion gas recovery device: including a jar body 1, the lower fixed surface of the jar body 1 is connected with supporting leg 3, the quantity of supporting leg 3 is a plurality of and evenly distributed, the last fixed surface of the jar body 1 is connected with bracing piece 12, the right fixed surface of bracing piece 12 is connected with horizontal pole 13, the lower fixed surface of horizontal pole 13 is connected with second telescopic link 14, the 14 output of second telescopic link extends to the inside of the jar body 1, the fixed surface of second telescopic link 14 is connected with sleeve 16, sleeve 16's internal surface sliding connection has lift head 15, the upper surface of lift head 15 and the output fixed connection of second telescopic link 14, be provided with sealing washer 17 between lift head 15 and the sleeve 16.
The right surface of the tank body 1 is fixedly connected with an air duct 18, the inner surface of the air duct 18 is fixedly connected with a second electromagnetic valve 19, the second electromagnetic valve 19 and a third electromagnetic valve 20 are all of a one-way type, a partition plate 10 is arranged between the second electromagnetic valve 19 and the third electromagnetic valve 20, the lower surface of the air duct 18 is fixedly connected with the third electromagnetic valve 20 and positioned on the lower surface of the second electromagnetic valve 19, the right surface of the air duct 18 is fixedly connected with a tank body 8, the lower surface of the tank body 8 is fixedly connected with a supporting leg 3, liquid 4 is filled in the tank body 1, the left surface of the tank body 8 is fixedly connected with a return pipe 6, the return pipe 6 is used for the backflow of liquid nitrogen, the output end of the return pipe 6 extends to the inside of the outflow pipe 5, the inner surface of the return pipe 6 is fixedly connected with a first electromagnetic valve 7, the top inner wall of the tank body 8 is fixedly connected with a first telescopic rod 11, and the output end of the first telescopic rod 11 is fixedly connected with the partition plate 10, the baffle 10 is used for compressing nitrogen gas, and the last fixed surface of baffle 10 is connected with pressure valve 9, and pressure valve 9 is used for the flow of nitrogen gas, and the left fixed surface of the jar body 1 is connected with inlet pipe 2, and the lower fixed surface of the jar body 1 is connected with outflow pipe 5.
The working principle is as follows: the liquid nitrogen is injected into the tank body 1 through the feeding pipe 2, when the liquid 4 is evaporated, the gas is positioned on the upper side of the tank body 1, the second electromagnetic valve 19 is opened, the gas flows into the tank body 8 through the gas guide pipe 18, the lifting head 15 is lowered, the pressure inside the tank body 1 is adjusted, the phenomenon that the liquid nitrogen is vaporized due to the fact that the pressure drops sharply is avoided, the first telescopic rod 11 is shortened, the gas flows to the lower side of the partition plate 10 through the pressure valve 9, the first telescopic rod 11 is extended to compress the gas, meanwhile, the tank body 8 provides low temperature, and the liquid nitrogen flows into the tank body 1 or is discharged through the first electromagnetic valve 7.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (8)
1. The utility model provides a gaseous recovery unit is diffused in evaporation of low temperature ordinary pressure liquid nitrogen storage tank, includes jar body (1), its characterized in that: a support rod (12) is fixedly connected to the upper surface of the tank body (1), a cross rod (13) is fixedly connected to the right surface of the support rod (12), a second telescopic rod (14) is fixedly connected to the lower surface of the cross rod (13), the output end of the second telescopic rod (14) extends into the tank body (1), a sleeve (16) is fixedly connected to the outer surface of the second telescopic rod (14), and a lifting head (15) is slidably connected to the inner surface of the sleeve (16);
the right side fixed surface of the jar body (1) is connected with air duct (18), the internal surface fixed connection of air duct (18) has second solenoid valve (19), the lower surface of air duct (18) just is located lower fixed surface of second solenoid valve (19) and is connected with third solenoid valve (20), the right side fixed surface of air duct (18) is connected with box (8), the first telescopic link of top inner wall fixedly connected with (11) of box (8), output fixedly connected with baffle (10) of first telescopic link (11), the last fixed surface of baffle (10) is connected with pressure valve (9).
2. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 1, characterized in that: the lower fixed surface of the tank body (1) is fixedly connected with supporting legs (3), and the number of the supporting legs (3) is a plurality of and is uniformly distributed.
3. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 1, characterized in that: the upper surface of the lifting head (15) is fixedly connected with the output end of the second telescopic rod (14), and a sealing ring (17) is arranged between the lifting head (15) and the sleeve (16).
4. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 1, characterized in that: the second electromagnetic valve (19) and the third electromagnetic valve (20) are both in a one-way type, and a partition plate (10) is arranged between the second electromagnetic valve (19) and the third electromagnetic valve (20).
5. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 1, characterized in that: the left surface of the box body (8) is fixedly connected with a return pipe (6), and the inner surface of the return pipe (6) is fixedly connected with a first electromagnetic valve (7).
6. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 1, characterized in that: the left fixed surface of the tank body (1) is fixedly connected with an inlet pipe (2), and the lower fixed surface of the tank body (1) is fixedly connected with an outlet pipe (5).
7. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 5, characterized in that: the output end of the return pipe (6) extends to the interior of the outlet pipe (5).
8. The recovery device of evaporative emissions gas from a cryogenic atmospheric liquid nitrogen storage tank according to claim 1, characterized in that: the lower surface and the supporting leg (3) fixed connection of box (8), the inside packing of the jar body (1) has liquid (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121447686.0U CN215427388U (en) | 2021-06-29 | 2021-06-29 | Low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121447686.0U CN215427388U (en) | 2021-06-29 | 2021-06-29 | Low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215427388U true CN215427388U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121447686.0U Active CN215427388U (en) | 2021-06-29 | 2021-06-29 | Low-temperature normal-pressure liquid nitrogen storage tank evaporation and diffusion gas recovery device |
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| Country | Link |
|---|---|
| CN (1) | CN215427388U (en) |
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2021
- 2021-06-29 CN CN202121447686.0U patent/CN215427388U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A low-temperature atmospheric pressure liquid nitrogen storage tank evaporation and release gas recovery device Effective date of registration: 20230321 Granted publication date: 20220107 Pledgee: Hunan Shuangpai rural commercial bank Limited by Share Ltd. Pledgor: Hunan Shengyu Technology Development Co.,Ltd. Registration number: Y2023980035454 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |