CN214663685U - Heating and pressurizing recovery device for evaporated gas of normal-pressure liquid nitrogen storage container - Google Patents
Heating and pressurizing recovery device for evaporated gas of normal-pressure liquid nitrogen storage container Download PDFInfo
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- CN214663685U CN214663685U CN202022751244.7U CN202022751244U CN214663685U CN 214663685 U CN214663685 U CN 214663685U CN 202022751244 U CN202022751244 U CN 202022751244U CN 214663685 U CN214663685 U CN 214663685U
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- heating
- liquid nitrogen
- gas
- pressure
- storage container
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 173
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 78
- 238000010438 heat treatment Methods 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 title claims abstract description 54
- 239000007789 gas Substances 0.000 title claims abstract description 50
- 238000011084 recovery Methods 0.000 title claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims abstract description 28
- 230000008020 evaporation Effects 0.000 claims abstract description 28
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 17
- 230000000630 rising effect Effects 0.000 claims abstract description 3
- 239000006200 vaporizer Substances 0.000 claims description 9
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses an ordinary pressure liquid nitrogen storage container evaporation gas adds heat and pressure recovery unit, including ordinary pressure liquid nitrogen storage container, heating device, pressure device and be used for preparing the nitrogen system device of nitrogen gas, the top or the lateral part of ordinary pressure liquid nitrogen storage container are offered and are used for supplying its inside evaporation gas exhaust's evaporation gas eduction port, the evaporation gas eduction port with heating device's entry intercommunication, heating device's export with pressure device's entry intercommunication, pressure device's export with nitrogen system device's export is linked together, heating device is used for heating the evaporation gas to normal atmospheric temperature, pressure device is used for rising the pressure of the normal atmospheric temperature nitrogen gas after the heating to 8 barG. The utilization rate of liquid nitrogen can be improved, and meanwhile, normal gas supply of the nitrogen making device can be reduced, so that the gas supply cost is effectively reduced, and the purposes of energy conservation and consumption reduction can be achieved.
Description
Technical Field
The utility model relates to an ordinary pressure liquid nitrogen storage container boil-off gas retrieves technical field, especially relates to an ordinary pressure liquid nitrogen storage container boil-off gas adds heat and pressure recovery unit.
Background
With the development of modern industry and society in China, the demand of industrial production for industrial nitrogen is increasing day by day, and industrial nitrogen has better price advantage no matter as self-use in production or as product export, so that air separation device manufacturers for producing nitrogen attach more and more importance to the potential of excavating equipment to improve the product application rate to the maximum extent.
Wherein, air separation plant not only can produce nitrogen gas, can also produce the liquid nitrogen, satisfy the technological requirement that needs the liquid nitrogen, the liquid nitrogen that produces mainly stores in the liquid nitrogen storage container of air separation device, because there is great difference in temperature between the liquid nitrogen storage container that stores the liquid nitrogen and the external environment, although liquid nitrogen storage container adopts pearlite evacuation cold insulation or ordinary pressure pearlite cold insulation, but still can not avoid liquid nitrogen storage container and external environment heat transfer, cause the inside partial low temperature liquid nitrogen of liquid nitrogen storage container to evaporate easily, for avoiding the inside superpressure of liquid nitrogen storage container, the inside boil off gas of liquid nitrogen storage container must discharge to the external world, the waste of product gas has been caused, the rate of utilization of cryogenic liquids is lower.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a normal pressure liquid nitrogen storage container evaporation gas heating and pressurizing recovery device, which can improve the utilization rate of liquid nitrogen, and simultaneously, can also reduce the normal gas supply of a nitrogen making device, effectively reduce the gas supply cost and achieve the purposes of energy saving and consumption reduction.
The purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides an ordinary pressure liquid nitrogen storage container evaporation gas adds heat and pressurizes recovery unit, includes ordinary pressure liquid nitrogen storage container, heating device, pressure device and is used for preparing the nitrogen system device of nitrogen gas, the top or the lateral part of ordinary pressure liquid nitrogen storage container are offered and are used for supplying its inside evaporation gas exhaust's evaporation gas exhanst outlet, the evaporation gas exhanst outlet with heating device's entry intercommunication, heating device's export with pressure device's entry intercommunication, pressure device's export with nitrogen system device's export is linked together, heating device is used for heating the evaporation gas to normal atmospheric temperature, pressure device is used for rising the pressure of normal atmospheric temperature nitrogen gas after the heating to 8 barG.
Further, the internal pressure of the atmospheric liquid nitrogen storage vessel is 0.1 to 0.2 barG.
Further, the heating device is a vaporizer.
Further, the heating device is an air-temperature vaporizer.
Further, a first pipeline is arranged between the evaporation gas outlet and the inlet of the heating device, and a valve is arranged in the first pipeline.
Further, a second pipeline is arranged between the outlet of the heating device and the inlet of the pressurizing device, a third pipeline is arranged at the outlet of the pressurizing device, a fourth pipeline is arranged at the outlet of the nitrogen making device, and the outlet of the fourth pipeline is communicated with the third pipeline.
Further, the pressurizing device is a compressor.
Compared with the prior art, the beneficial effects of the utility model reside in that:
by arranging the heating device, and communicating an evaporation gas exhaust port at the top or the side of the normal pressure liquid nitrogen storage container with an inlet of the heating device, low temperature evaporation gas (namely low temperature nitrogen gas) formed by evaporation in the normal pressure liquid nitrogen storage container is led into the heating device, the low temperature evaporation gas is heated to normal temperature nitrogen gas by using the heating device, waste gas utilization is realized, and the utilization rate of the low temperature liquid nitrogen is improved, meanwhile, the arrangement of the pressurizing device can pressurize the nitrogen gas heated to normal temperature to 8barG, so that the normal temperature nitrogen gas can be directly put into use, in addition, because the outlet of the pressurizing device is communicated with the outlet of the nitrogen making device, the heating, pressurizing and recycling of the liquid nitrogen evaporation gas and the simultaneous or separate gas supply of the nitrogen making device can be realized, thus, the evaporation gas in the normal pressure liquid nitrogen storage container can be effectively utilized, and the normal gas supply amount of the nitrogen making device can be reduced, effectively reduces the air supply cost and can achieve the purposes of energy conservation and consumption reduction.
Drawings
Fig. 1 is a schematic structural diagram of the device for heating, pressurizing and recovering the boil-off gas in the normal-pressure liquid nitrogen storage container of the present invention.
In the figure: 1. a normal pressure liquid nitrogen storage container; 2. a heating device; 3. a pressurizing device; 4. a nitrogen making device; 5. a first conduit; 6. a valve; 7. a second conduit; 8. a third pipeline; 9. a fourth conduit.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
Referring to fig. 1, there is shown an apparatus for heating and pressurizing recovery of evaporated gas from an atmospheric liquid nitrogen storage container according to a preferred embodiment of the present invention, comprising an atmospheric liquid nitrogen storage container 1, a heating apparatus 2, a pressurizing apparatus 3, and a nitrogen generator 4 for producing nitrogen gas, specifically, the atmospheric liquid nitrogen storage container 1 has an internal pressure of 0.1-0.2barG (i.e. 10kpa-20kpa), the top or side of the atmospheric liquid nitrogen storage container 1 is provided with an evaporated gas outlet for discharging evaporated gas therein, the evaporated gas outlet is communicated with an inlet of the heating apparatus 2 through a first pipe 5, the first pipe 5 is provided with a valve 6 for controlling on-off thereof, the heating apparatus 2 is used for heating low-temperature evaporated gas to normal temperature, the outlet of the heating apparatus 2 is communicated with the inlet of the pressurizing apparatus 3 through a second pipe 7, the outlet of the pressurizing device 3 is provided with a third pipeline 8, the outlet of the nitrogen making device 4 is provided with a fourth pipeline 9, the outlet of the fourth pipeline 9 is communicated with the third pipeline 8, so that the fourth pipeline 9 and the third pipeline 8 can be converged and are communicated with an external nitrogen supply pipeline, wherein the pressurizing device 3 is used for increasing the pressure of the heated normal-temperature nitrogen to 8barG so as to ensure that the normal-temperature nitrogen can be directly put into use.
By arranging the heating device 2 and communicating the evaporation gas exhaust outlet at the top or the side of the normal pressure liquid nitrogen storage container 1 with the inlet of the heating device 2, the low temperature evaporation gas (namely low temperature nitrogen gas) formed by evaporation in the normal pressure liquid nitrogen storage container 1 is led into the heating device 2, the low temperature evaporation gas is heated to normal temperature nitrogen gas by using the heating device 2, thereby realizing waste gas utilization, improving the utilization rate of the low temperature liquid nitrogen, meanwhile, the arrangement of the pressurizing device 3 can pressurize the nitrogen gas heated to normal temperature to 8barG, so that the normal temperature nitrogen gas can be directly put into use, in addition, as the outlet of the pressurizing device 3 is communicated with the outlet of the nitrogen making device 4, the heating, pressurizing and recycling of the liquid nitrogen evaporation gas and the simultaneous or separate gas supply of the nitrogen making device 4 can be realized, thus, the evaporation gas in the normal pressure liquid nitrogen storage container 1 can be effectively utilized, but also can reduce the normal air supply quantity of the nitrogen making device 4, effectively reduce the air supply cost and achieve the purposes of energy conservation and consumption reduction.
In a preferred embodiment, the heating device 2 is a vaporizer, and is preferably an air-temperature vaporizer, after low-temperature vapor (i.e., low-temperature nitrogen gas) is introduced into the air-temperature vaporizer, the low-temperature vapor exchanges heat with water vapor in the air inside the air-temperature vaporizer, which may cause frosting of the air-temperature vaporizer, and a thermal insulation layer may be formed when the frosting is frosted to a certain extent. Of course, in other embodiments, the heating device 2 may be a heat exchanger such as a circulating hot water heater, a steam-water bath heater, an electric heat tracing type heater, or a heating device such as a heat transfer oil heating boiler or a steam heating boiler.
In a preferred embodiment, the atmospheric liquid nitrogen storage vessel 1 is a liquid nitrogen flat-bottomed storage tank and the pressurizing means 3 is a compressor.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (7)
1. The utility model provides an ordinary pressure liquid nitrogen storage container evaporation gas adds heat pressurization recovery unit, its characterized in that, includes ordinary pressure liquid nitrogen storage container, heating device, pressure device and is used for preparing the nitrogen system device of nitrogen gas, the top or the lateral part of ordinary pressure liquid nitrogen storage container are offered and are used for supplying its inside evaporation gas exhaust outlet, the evaporation gas exhaust outlet with heating device's entry intercommunication, heating device's export with pressure device's entry intercommunication, pressure device's export with nitrogen system device's export is linked together, heating device is used for heating the evaporation gas to normal atmospheric temperature, pressure device is used for rising the pressure of the normal atmospheric temperature nitrogen gas after the heating to 8 barG.
2. The apparatus for recovering vapor under heat and pressure from an atmospheric-pressure liquid nitrogen storage vessel as defined in claim 1, wherein the internal pressure of said atmospheric-pressure liquid nitrogen storage vessel is 0.1 to 0.2 barG.
3. The apparatus for heating and pressurizing recovery of boil-off gas from an atmospheric liquid nitrogen storage vessel as claimed in claim 1, wherein the heating means is a vaporizer.
4. The apparatus for heating and pressurizing recovery of boil-off gas from an atmospheric liquid nitrogen storage container as claimed in claim 3, wherein the heating means is an air-temperature vaporizer.
5. The apparatus for heating and pressurizing recovery of boil-off gas from an atmospheric liquid nitrogen storage container as claimed in claim 1, wherein a first pipe is provided between the boil-off gas discharge port and the inlet of the heating means, and the first pipe is provided with a valve.
6. The apparatus according to claim 1, wherein a second pipeline is arranged between the outlet of the heating apparatus and the inlet of the pressurizing apparatus, a third pipeline is arranged at the outlet of the pressurizing apparatus, a fourth pipeline is arranged at the outlet of the nitrogen making apparatus, and the outlet of the fourth pipeline is communicated with the third pipeline.
7. The apparatus for heating and pressurizing recovery of boil-off gas from an atmospheric liquid nitrogen storage vessel as claimed in claim 1, wherein the pressurizing means is a compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022751244.7U CN214663685U (en) | 2020-11-24 | 2020-11-24 | Heating and pressurizing recovery device for evaporated gas of normal-pressure liquid nitrogen storage container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022751244.7U CN214663685U (en) | 2020-11-24 | 2020-11-24 | Heating and pressurizing recovery device for evaporated gas of normal-pressure liquid nitrogen storage container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214663685U true CN214663685U (en) | 2021-11-09 |
Family
ID=78469801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022751244.7U Active CN214663685U (en) | 2020-11-24 | 2020-11-24 | Heating and pressurizing recovery device for evaporated gas of normal-pressure liquid nitrogen storage container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214663685U (en) |
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2020
- 2020-11-24 CN CN202022751244.7U patent/CN214663685U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 27-28, 7th floor, building 12, Shenzhen Bay science and technology ecological park, No. 18, South Keji Road, high tech community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Haige Jingu Industrial Technology Co.,Ltd. Address before: No. 27-28, 7th floor, building 12, Shenzhen Bay science and technology ecological park, No. 18, South Keji Road, high tech community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN THRESHOLD INDUSTRIAL TECHNOLOGY CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |