CN213900703U - Liquid nitrogen storage tank - Google Patents
Liquid nitrogen storage tank Download PDFInfo
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- CN213900703U CN213900703U CN202022486189.3U CN202022486189U CN213900703U CN 213900703 U CN213900703 U CN 213900703U CN 202022486189 U CN202022486189 U CN 202022486189U CN 213900703 U CN213900703 U CN 213900703U
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- valve
- tank body
- tank
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 239000007788 liquid Substances 0.000 title claims abstract description 96
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 78
- 239000010410 layer Substances 0.000 claims abstract description 29
- 239000011229 interlayer Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 239000011888 foil Substances 0.000 claims abstract description 5
- 239000012774 insulation material Substances 0.000 claims abstract description 5
- 229920002635 polyurethane Polymers 0.000 claims abstract description 5
- 239000004814 polyurethane Substances 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 11
- 239000011810 insulating material Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 230000007306 turnover Effects 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A liquid nitrogen storage tank belongs to the technical field of pressure vessels and comprises a tank body, a functional valve and a liquid nitrogen evaporator. The tank body is cylindrical, two ends of the tank body are arched end sockets, the tank body is made of special low-temperature-resistant stainless steel materials through welding, the tank body comprises a tank shell, a middle liner and an inner container, a heat insulation layer is arranged between the tank shell and the middle liner, polyurethane heat insulation materials are filled in the tank shell and subjected to vacuumizing treatment, a vacuum heat insulation layer is arranged between the inner container and the middle liner, and an aluminum foil layer is arranged on the outer surface of the tank shell. The functional valve comprises a safety valve, a pressure gauge valve, a liquid level meter valve, a liquid discharge valve, a vacuum pumping valve, a middle interlayer feeding valve, a nitrogen inlet and outlet valve, a cryopump control valve, a liquid outlet valve and an air return valve. The liquid nitrogen storage tank can be made into a vertical type or a horizontal type according to the shape of the tank body, and can be divided into a movable type and a fixed type according to the installation mode. The utility model is suitable for fire fighting in industries such as industry, civil use, military industry and the like, the storage tank does not leak, extinguishes fire rapidly, does not pollute the environment, and does not damage the material in the fire place.
Description
Technical Field
The utility model belongs to the technical field of pressure vessel, concretely relates to liquid nitrogen storage tank of fire control usefulness of putting out a fire.
Background
At present, fire extinguishing agents used for fire fighting at home and abroad mainly comprise water, foam, alkyl halide series, high-pressure carbon dioxide, low-pressure carbon dioxide and the like. The existing fire extinguishing agent has serious pollution and damage to secretary files and valuables, the halogenated alkane series fire extinguishing agent also has a damage effect on the atmospheric ozone layer, is eliminated in a global range, and high-pressure and low-pressure carbon dioxide has certain influence on the atmospheric greenhouse effect. The liquid nitrogen is used as a fire extinguishing agent, a large amount of heat can be absorbed in the gasification process, the fire is rapidly cooled, the effect of rapidly extinguishing fire is achieved, the environment is not polluted, and the secretary files and valuables are protected. Although nitrogen is known to have the best fire extinguishing effect, liquid nitrogen is difficult to store for a long time and is rarely applied in special emergency occasions. Hitherto, the existing steel cylinders are of single-layer structures, the heat insulation performance is poor, the liquid state can be seriously leaked after long-term storage, and the performance of the storage tank can not meet the specified requirement when a fire disaster happens.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, it is an object of the present invention to provide a liquid nitrogen storage tank, which can compress nitrogen into-196 ℃ liquid for long-term storage without loss and leakage, and can effectively solve the above problems.
The technical scheme of the utility model is that: a liquid nitrogen storage tank is composed of a tank body, a functional valve and a liquid nitrogen evaporator.
The tank body is cylindrical, and two ends of the tank body are arched end sockets and are formed by precision welding. The tank body is made of special low-temperature resistant steel plate materials and comprises a tank shell, an inner container and a middle container. A heat insulating material layer is arranged between the tank shell and the middle liner, polyurethane heat insulating material is filled between the layers, and vacuumizing treatment is carried out; a vacuum heat insulation layer is arranged between the inner container and the middle container, vacuumizing treatment is carried out, and the outer surface of the tank shell is polished and then is subjected to electrostatic spraying treatment by using aluminum foil powder to form an aluminum foil layer, so that the functions of reflection and heat insulation are achieved.
The tank body is welded with a functional valve outlet which is connected with a functional valve, and the functional valve comprises a safety valve, a pressure gauge valve, a liquid level meter valve, a liquid discharge valve, a vacuum pumping valve, a middle interlayer feeding valve, a nitrogen inlet and outlet valve, a cryopump control valve, a liquid outlet valve and a gas return valve.
The safety valve is arranged at the upper part of the tank body and is communicated with the interior of the tank body, and when the pressure in the tank exceeds a limited pressure, the safety valve is automatically opened to ensure the safety of the storage tank; the pressure gauge valve is arranged at the upper position of the lower part of the tank body, is communicated with the inside of the tank body and is externally connected with a pressure gauge, so that the pressure in the tank can be displayed in real time; the liquid level meter valve, the liquid discharge valve, the vacuum pumping valve, the middle interlayer feeding valve, the nitrogen inlet and outlet valve and the low-temperature pump control valve are all arranged at the sealing end of the tank body, the liquid level meter valve is communicated with the inside of the tank body, and a liquid level meter is arranged outside the tank body and can display the storage amount of liquid nitrogen in the tank body in real time; the liquid discharge valve is communicated with the inside of the tank body, is opened when the tank body is filled with liquid nitrogen, is convenient for discharging air in the tank, and is closed when the tank is filled with the liquid nitrogen; the vacuumizing valve is communicated with the heat insulation material layer and the vacuum heat insulation layer and is externally connected with a vacuum pump, and after the tank body is manufactured, the heat insulation material layer and the vacuum heat insulation layer are vacuumized and are in a closed state at ordinary times; the interlayer feeding valve is communicated with the interlayer between the tank shell and the interlayer liner and is used for filling heat-insulating materials, the interlayer is externally connected with a temporary feeding hopper, and the interlayer is closed at ordinary times after the interlayer is filled with the heat-insulating materials and is vacuumized; one end of the nitrogen inlet and outlet valve is communicated with the tank body, and the other end of the nitrogen inlet and outlet valve is connected with a liquid nitrogen filling pipe or a fire hose at any time through a special pipe joint, is opened during filling or fire extinguishing and is in a closed state at ordinary times; one end of a cryogenic pump control valve is communicated with the interior of the tank body, the other end of the cryogenic pump control valve is connected with the cryogenic pump, when the pressure in the tank is insufficient during fire extinguishing, and liquid nitrogen in the tank is not sprayed smoothly, the cryogenic pump is started to increase the pressure in the tank; the liquid outlet valve and the air return valve are respectively communicated with the inside of the storage tank and are connected with two interfaces of the evaporator through pipelines, the liquid outlet valve is arranged at the lower part of the tank body, and the air return valve is arranged at the upper part of the tank body.
The evaporator is of a plate structure and is positioned outside the tank body, a circulating pipe is arranged in the evaporator, the inlet end of the circulating pipe is connected with the liquid outlet valve, the outlet end of the circulating pipe is connected with the gas return valve, the liquid outlet valve and the gas return valve are opened during fire extinguishing, liquid nitrogen is vaporized through the evaporator, pressure in the tank is increased after vaporized nitrogen enters the tank body, the nitrogen in the tank body is conveniently sprayed out from the nitrogen inlet and outlet valve, and the liquid outlet valve and the gas return valve are in a closed state at ordinary times.
The liquid nitrogen storage tank can be made into a vertical type or a horizontal type according to the shape of the tank body, and the installation mode of the storage tank can be divided into a movable type installed on a vehicle or a fixed type installed at a fixed position.
The use method of the liquid nitrogen storage tank comprises the following steps:
before filling liquid nitrogen, the heat insulation material layer and the vacuum heat insulation layer are ensured to be in a vacuum state, and all valves are ensured to be in a closed state.
When filling liquid nitrogen, firstly, the safety valve, the liquid level meter valve, the pressure gauge valve and the liquid discharge valve are opened, then the nitrogen inlet and outlet valve is opened to fill the liquid nitrogen, when the liquid discharge valve overflows the liquid nitrogen outwards, the nitrogen inlet and outlet valve is closed, and meanwhile, the liquid discharge valve is closed, so that the filling is completed.
When the fire extinguishing work is carried out, the fire hose is connected with the nitrogen inlet and outlet valve, the liquid outlet valve and the gas return valve are opened, liquid nitrogen is vaporized through the evaporator, the vaporized nitrogen enters the tank body through the gas return pipeline, and after sufficient pressure is formed in the tank body, the liquid nitrogen inlet and outlet valve is opened to spray the nitrogen to a fire extinguishing site. When the nitrogen spraying pressure of the fire hose is insufficient, the cryogenic pump control valve is opened to increase the pressure in the tank and ensure normal fire extinguishing. When the liquid level meter displays that the liquid nitrogen is used up, the low-temperature pump control valve, the nitrogen inlet and outlet valve, the liquid outlet valve and the gas return valve are closed, and the fire extinguishing work is finished.
After the fire extinguishing work is finished, liquid nitrogen is refilled for reuse.
The utility model provides a liquid nitrogen storage tank, its beneficial effect is: compared with the existing fire extinguishing agent and the storage tank thereof, the utility model has the advantages of rapid fire extinguishing, no environmental pollution, no damage to the fire place materials, low cost and the like. The utility model can be fixedly arranged on fire-fighting vehicles, ships and airplanes, and can put out fire for high-rise buildings, offshore targets, forests and the like; the utility model discloses portable needs assembly running gear can install in the colliery underworkings, prevents the gas explosion. In addition, the utility model discloses still can install on the refrigerated transport vechicle and keep fresh to medicine or food, can also be used to all places that need the cooling such as power plant, nuclear power station.
The utility model discloses simple structure, economical and practical, the enterprise that has pressure vessel and makes the qualification can make. The fire-fighting cooling agent is applied to fire-fighting and cooling in industries such as industry, civil use, military industry and the like, and can generate remarkable economic benefit and social benefit.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-tank body, 101-tank shell, 102-intermediate tank, 103-inner tank, 104-heat insulating layer, 2-pressure gauge valve, 3-liquid level meter valve, 4-liquid discharge valve, 5-vacuum pumping valve, 6-safety valve, 7-intermediate interlayer feed valve, 8-nitrogen inlet and outlet valve, 9-low temperature pump valve, 10-liquid outlet valve and 11-air return valve.
Detailed Description
The following describes the embodiments of the liquid nitrogen storage tank provided by the present invention in further detail with reference to the accompanying drawings.
As shown in figure 1, the liquid nitrogen storage tank is composed of a tank body 1, various functional valves and a liquid nitrogen evaporator.
The tank body 1 is cylindrical, two ends of the tank body are arched end sockets, and the tank body is formed by precision welding. The tank body is made of special low-temperature-resistant steel plate materials and comprises a tank shell 101, a middle liner 102 and an inner liner 103, wherein a heat insulating layer 104 is arranged between the tank shell 101 and the middle liner 102, and polyurethane heat insulating materials are filled in the tank shell and subjected to vacuumizing treatment; a vacuum heat insulation layer is arranged between the inner container 103 and the middle container 102, and vacuumizing treatment is carried out; the outer surface of the can shell 101 is polished and then electrostatically sprayed with aluminum foil powder.
The tank body 1 is welded with a pipe joint and is provided with various functional valves, including a safety valve 6, a pressure gauge valve 2, a liquid level gauge valve 3, a liquid discharge valve 4, a vacuum pumping valve 5, a safety valve 6, a middle interlayer feed valve 7, a nitrogen inlet and outlet valve 8, a low-temperature pump control valve 9, a liquid outlet valve 10 and a gas return valve 11.
The pressure gauge valve 2 is arranged at the upper position of the lower part of the tank body 1, is communicated with the inside of the tank body 1 and is externally connected with a pressure gauge; the liquid level meter valve 3, the liquid discharge valve 4, the vacuumizing valve 5, the safety valve 6, the interlayer feeding valve 7, the nitrogen inlet and outlet valve 8 and the low-temperature pump control valve 9 are all arranged at the upper part of the tank body 1, wherein the liquid level meter valve 3 is communicated with the inside of the tank body 1, and a liquid level meter is arranged outside; the drain valve 4 is communicated with the inside of the tank body 1; the vacuum pumping valve 5 is communicated with the heat insulating layer 104 and the vacuum heat insulating layer and is externally connected with a vacuum pump; the safety valve 6 is communicated with the inside of the tank body 1, and a safety device is arranged on the safety valve 6; the middle interlayer feed valve 7 is communicated with a heat insulating layer 104 between the tank shell 101 and the middle liner 102, is used for filling heat insulating materials and is externally connected with a temporary feed hopper; one end of the nitrogen inlet and outlet valve 8 is communicated with the tank body 1, and the other end is temporarily connected with a liquid nitrogen filling pipe or a fire hose through a special pipe joint; one end of the cryopump control valve 9 is communicated with the tank body, and the other end of the cryopump control valve is connected with the cryopump; the liquid outlet valve 10 is arranged at the lower part of the tank body, the air return valve 11 is arranged at the upper part of the tank body, one end of the air return valve is communicated with the inside of the tank body 1, and the other end of the air return valve is connected with the evaporator through a pipeline.
The liquid nitrogen storage tank can be divided into a vertical type or a horizontal type according to the shape structure of the tank body 1, and can be divided into a movable type or a fixed type according to the installation mode of the storage tank.
The use method of the liquid nitrogen storage tank comprises the following steps:
before filling liquid nitrogen, the polyurethane thermal insulation layer 104 and the vacuum thermal insulation layer are ensured to be in a vacuum state, and all valves are ensured to be in a closed state.
When filling liquid nitrogen, firstly, the safety valve 6, the liquid level meter valve 3, the pressure gauge valve 2 and the liquid discharge valve 4 are opened, then the nitrogen inlet and outlet valve 8 is opened to fill the liquid nitrogen, when the liquid discharge valve 4 overflows the liquid nitrogen outwards, the nitrogen inlet and outlet valve 8 is closed, and meanwhile, the liquid discharge valve 4 is closed, so that filling is completed.
When the fire extinguishing work is carried out, the fire hose is connected to the nitrogen inlet and outlet valve 8, the liquid outlet valve 10 and the gas return valve 11 are firstly opened, liquid nitrogen is vaporized through the evaporator, vaporized nitrogen enters the tank body 1, and after sufficient pressure is formed in the tank body 1, the nitrogen inlet and outlet valve 8 is opened to spray the nitrogen to a fire extinguishing site. When the pressure of the sprayed nitrogen is insufficient, the cryogenic pump is started again to increase the pressure in the tank, and when the liquid level meter displays that the liquid nitrogen in the tank is insufficient, the nitrogen inlet and outlet valve 8, the cryogenic pump control valve 9, the liquid outlet valve 10 and the air return valve 11 are closed, so that the fire extinguishing work is finished.
After the fire extinguishing work is finished, liquid nitrogen is refilled for reuse.
It should be pointed out that this embodiment is one of the preferred aspects of the present invention, and all simple improvements made according to this embodiment all belong to the protection scope of the present invention.
Claims (3)
1. A liquid nitrogen storage tank is composed of a tank body (1), a functional valve and a liquid nitrogen evaporator, and is characterized in that the tank body (1) is cylindrical, two ends of the tank body are arched end sockets, the tank body is made of special low-temperature-resistant steel plate materials through precision welding, the tank comprises a tank shell (101), a middle liner (102) and an inner liner (103), a heat insulation layer (104) is arranged between the tank shell (101) and the middle liner (102), polyurethane heat insulation materials are filled in the tank shell, and vacuumizing treatment is carried out; a vacuum heat insulation layer is arranged between the inner container (103) and the middle container (102), and vacuumizing treatment is carried out; the outer surface of the tank shell (101) is provided with an aluminum foil layer.
2. The liquid nitrogen storage tank is characterized in that a pipe joint is welded on the tank body (1) and a functional valve is installed on the tank body, the functional valve comprises a safety valve (6), a pressure gauge valve (2), a liquid level gauge valve (3), a liquid discharge valve (4), a vacuumizing valve (5), the safety valve (6), a middle interlayer feeding valve (7), a nitrogen inlet and outlet valve (8), a low-temperature pump control valve (9), a liquid outlet valve (10) and a gas return valve (11), the pressure gauge valve (2) is installed on the upper lower portion of the tank body (1) and is communicated with the inside of the tank body (1) and externally connected with a pressure gauge; level gauge valve (3), flowing back valve (4), evacuation valve (5), safety valve (6), intermediate layer feed valve (7), business turn over nitrogen gas valve (8), cryogenic pump control valve (9) all install in the head outside of jar body (1), wherein: the liquid level meter valve (3) is communicated with the inside of the tank body (1), and a liquid level meter is arranged outside; the drain valve (4) is communicated with the inside of the tank body (1); the vacuum pumping valve (5) is communicated with the heat insulating layer (104) and the vacuum heat insulating layer and is externally connected with a vacuum pump; the safety valve (6) is communicated with the inside of the tank body (1), and a safety device is arranged on the safety valve (6); the middle interlayer feed valve (7) is communicated with a heat insulating layer (104) between the tank shell (101) and the middle liner (102) for filling heat insulating materials and is externally connected with a temporary feed hopper; one end of the nitrogen inlet and outlet valve (8) is communicated with the inside of the tank body (1), and the other end is provided with a special pipe joint for connecting a liquid nitrogen filling pipe or a fire hose; one end of a cryogenic pump control valve (9) is communicated with the interior of the tank body, and the other end is connected with a cryogenic pump; the liquid outlet valve (10) is arranged at the lower part of the tank body, the air return valve (11) is arranged at the upper part of the tank body, one end of the air return valve is communicated with the inside of the tank body (1), and the other end of the air return valve is connected with the evaporator through a pipeline.
3. The storage tank for liquid nitrogen according to claim 1, wherein the storage tank for liquid nitrogen is made in a vertical or horizontal type according to the shape of the tank body (1), and is divided into a movable type mounted on a movable vehicle or a fixed type mounted in a fixed position according to the installation mode of the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022486189.3U CN213900703U (en) | 2020-10-30 | 2020-10-30 | Liquid nitrogen storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022486189.3U CN213900703U (en) | 2020-10-30 | 2020-10-30 | Liquid nitrogen storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213900703U true CN213900703U (en) | 2021-08-06 |
Family
ID=77116052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022486189.3U Expired - Fee Related CN213900703U (en) | 2020-10-30 | 2020-10-30 | Liquid nitrogen storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213900703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405850A (en) * | 2022-07-05 | 2022-11-29 | 沪东中华造船(集团)有限公司 | Liquid hydrogen storage tank for independent cabin transport ship |
-
2020
- 2020-10-30 CN CN202022486189.3U patent/CN213900703U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405850A (en) * | 2022-07-05 | 2022-11-29 | 沪东中华造船(集团)有限公司 | Liquid hydrogen storage tank for independent cabin transport ship |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210806 |