CN105715945A - High-vacuum insulation low-temperature storage tank and manufacturing method thereof - Google Patents
High-vacuum insulation low-temperature storage tank and manufacturing method thereof Download PDFInfo
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- CN105715945A CN105715945A CN201610142813.3A CN201610142813A CN105715945A CN 105715945 A CN105715945 A CN 105715945A CN 201610142813 A CN201610142813 A CN 201610142813A CN 105715945 A CN105715945 A CN 105715945A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
- F17C13/006—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure for Dewar vessels or cryostats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/032—Orientation with substantially vertical main axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/056—Small (<1 m3)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0345—Fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0391—Thermal insulations by vacuum
- F17C2203/0395—Getter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/238—Filling of insulants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
Abstract
The invention relates to the technical field of low temperature pressure vessels, in particular to a high-vacuum insulation low-temperature storage tank and a manufacturing method thereof. The high-vacuum insulation low-temperature storage tank comprises an outer shell and an inner container. A vacuum shell is formed between the outer shell and the inner container. At least one vacuumizing pipe is arranged in the vacuum shell, one end of each vacuumizing pipe stretches out of the outer shell, and the other end of each vacuumizing pipe extends into the vacuum shell. Air bleeding holes are distributed in each vacuumizing pipe in the pipe body length direction. The outer side wall of the inner container is coated with a thermal insulation material, and an adsorption molecular sieve is further arranged between the inner container and the thermal insulation material. The storage tank is short in vacuumizing time, high in vacuum degree and good in thermal insulation, the high vacuum degree can be kept for a long time, and a good sealing and heat preservation effect is achieved.
Description
Technical field
The present invention relates to low-temperature pressure container field, be specifically related to a kind of low-temperature storage tank that vacuum shell carries out adiabatic optimization design and manufacture method thereof, this storage tank can be used for storing LNG.
Background technology
LNG (i.e. liquefied natural gas) is by the natural gas of gaseous state under normal pressure is cooled to-162 DEG C, so as to condense into liquid.After natural gas liquefaction can very big saving storage and transportation space and cost, and have that calorific value is big, performance high.
Ultravacuum multi-lay winding LNG storage tank is the key equipment in gas station, and the quality of its thermal insulation and sealing directly influences evaporation and the leakage rate of LNG, i.e. the loss rate of LNG and utilization rate.The performance parameter of storage tank mainly has vacuum, leak rate, static evaporation rate.This equipment is made up of the support of inner pressurd vessel (inner bag), shell, vacuum heat-insulating layer, inner pressurd vessel and shell and pipeline fittings device etc..Existing ultravacuum be wound around LNG storage tank exist pumpdown time length and vacuum can not the problem such as ultravacuum degree maintenance for a long time, there is a need to further improvement.
Summary of the invention
In order to solve above-mentioned technical problem, an object of the present invention is in that to provide a kind of vacuum height, thermal insulation is good, have excellent sealing heat insulation effect, it is possible to the long-term high-vacuum insulation low-temperature storage tank keeping condition of high vacuum degree.
For realizing above-mentioned technical purpose, the present invention adopts following technical scheme:
High-vacuum insulation low-temperature storage tank, including shell and inner bag, is formed with vacuum shell, is provided with at least one vacuum-pumping tube in described vacuum shell between described shell and inner bag, described shell is stretched out in one end of described vacuum-pumping tube, and the other end extends in described vacuum shell；Described vacuum-pumping tube is made up of special material, inner hollow, and tube wall is multi-cellular structure, and gas has trapping and adsorption；The lateral wall of described inner bag is coated with adiabator, is additionally provided with binding molecule sieve between described inner bag and described adiabator.
As preferably, some (at least one) vacuum-pumping tubes circumferentially it are evenly arranged with in described vacuum shell, the head end of described shell is stretched out in corresponding one end of described vacuum-pumping tube after converging mutually, the other end extends and respectively near the tail end to described shell in described vacuum shell.
As it is preferred that, described adiabator is that aluminium foil glass fibre carries out mechanism and adds charcoal and formed, and gas is not only had an absorption property by this material, and heat-insulating property is more preferably simultaneously.
The correction data of adiabator such as table 1 below.
The contrast of the different adiabator performance of table 1
| Sequence number | Material | Thermal conductivity λc/W·(m·K)-1 | Heattransfer rate q/W cm2 |
| 1 | 0.0087mm aluminium foil+mechanism adds carbon | 1.53×10-6 | 1.09×10-5 |
| 2 | 0.004mm aluminium foil+0.035mm heavy sheet glass | 0.971×10-4 | 0.416×10-4 |
As it is preferred that, the gas absorption molecular sieve after being sufficiently activated is evenly distributed on inner bladder outer wall, adiabator wrap up, and described adiabator is evenly distributed with pore.
As it is preferred that, be provided with hydrogen abstraction reaction material in described vacuum shell, it is uniformly placed and is fixed on adiabator outer surface.
Another object of the present invention is to provide the method manufacturing the above high-vacuum insulation low-temperature storage tank, the present invention shortens the pumpdown time by the following method and improves the vacuum of storage tank；
S1. storage tank is placed in thermal chamber, and the external part of vacuum-pumping tube in storage tank is connected vacuum extractor；
S2. the electric heater by arranging on heat treatment indoor floor, improves the temperature in thermal chamber, and after then a certain amount of air being heated to uniform temperature, from storage tank, feed tube passes into inner bag and discharges from upper inlet；
S3. open vacuum extractor, by storage tank being heated in thermal chamber to uniform temperature, make the temperature in vacuum shell raise, molecular motion aggravation in vacuum shell, reduce the time of evacuation, when storage tank uses at low temperature state, its vacuum will be enhanced；
S4. at evacuation simultaneously as the thermal chamber heating to storage tank, binding molecule sieve is carried out further heat-activated.
It addition, before to storage tank heat evacuation, it is desirable in the vacuum shell of storage tank, pass into hot nitrogen, so that air in vacuum shell to be replaced.
The present invention has at least following beneficial effect:
(1) by optimizing structure, utilize the vacuum tube of special construction can greatly reduce the time of storage tank evacuation, and improve its vacuum.
(2) by storage tank being placed in thermal chamber and heating to uniform temperature, the hot-air in thermal chamber is blown in storage tank so that molecular motion aggravates, thus reducing the time of evacuation, and improves vacuum.
(3) the long-term vacuum degree of storage tank can be kept by optimizing filling adsorption material and activation fill method；By optimizing adiabator, employing carries out mechanism at aluminium foil glass fibre and adds charcoal, improves inner bag heat-insulating property.
Accompanying drawing explanation
The following drawings is only intended to, in the present invention being schematically illustrated and explaining, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the partial structurtes schematic diagram of the embodiment of the present invention；
Fig. 3 is the right TV structure schematic diagram of Fig. 2；
Fig. 4 is the partial structurtes schematic diagram between shell and inner bag；
Fig. 5 is the partial structurtes schematic diagram of vacuum-pumping tube；
Fig. 6 is assembling structural representation during embodiment of the present invention evacuation.
In figure: 1-shell；2-inner bag；3-vacuum shell；4-vacuum-pumping tube；5-micropore；6-adiabator；7-pore；8-binding molecule sieves；9-hydrogen abstraction reaction material；10-thermal chamber；11-vacuum pump；12-electric heater；13-air heater；14-heat-insulation layer；15-nitrogen cylinder；16-nitrogen heater；17-blower fan；18-filter.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is expanded on further.In the following detailed description, some one exemplary embodiment of the present invention is only described by the mode of explanation.Undoubtedly, those of ordinary skill in the art will be consequently realised that, when without departing from the spirit and scope of the present invention, it is possible to by various different modes, described embodiment is modified.Therefore, accompanying drawing and description are inherently illustrative, rather than are used for limiting scope of the claims.
As shown in Figures 1 to 6, high-vacuum insulation low-temperature storage tank, may be used for storing LNG, including shell 1 and inner bag 2, it is formed with vacuum shell 3 between described shell 1 and inner bag 2, vacuum-pumping tube 4 circumferentially it is evenly arranged with in described vacuum shell 3, for four in Fig. 3, the head end (one of them end socket) of described shell 1 is stretched out in corresponding one end of described vacuum-pumping tube 4 after converging mutually, the other end extends and respectively near the tail end (i.e. another end socket) to described shell 1 in described vacuum shell 3；Described vacuum-pumping tube 4 has the micropore 5 of special construction (in cellular layout) along tube length direction, with reference to Fig. 4 and Fig. 5；The lateral wall of described inner bag 2 is coated with adiabator 6, and described adiabator 6 carries out mechanism for aluminium foil and glass fibre and adds charcoal formation, and is evenly distributed with pore 7 on described adiabator 6；Absorption N it is provided with in described vacuum shell 32And H2The binding molecule sieve 8 of O, binding molecule sieve 8 is wrapped between storage tank inner bag 2 and described adiabator 6, is additionally provided with hydrogen abstraction reaction material 9 outside described adiabator 6.
The present invention reduces the time of evacuation by optimization structure and vacuum pumping method, improves its vacuum.Referring again to Fig. 2 to Fig. 6, it is uniformly distributed circumferentially in the vacuum shell 3 formed between shell 1 and inner bag 2 and vacuum-pumping tube 4 is installed, for four, when starting vacuum pump and the gas in shell 1 being evacuated to ultravacuum state, in shell, gas molecule is changed into collision movement by Brownian movement, and evacuation is extremely difficult by what become, the vacuum-pumping tube structure of the present invention, the time of evacuation will be greatly reduced, improve its vacuum.
Refer to Fig. 6, storage tank of the present invention, when evacuation, adopts following methods to carry out:
S1. storage tank is placed in thermal chamber 10, first in vacuum shell 3, passes into hot nitrogen and air in shell is replaced, then vacuum-pumping tube in storage tank 4 is connected vacuum pump 11；In order to improve heat insulation effect, thermal chamber 10 is provided with heat-insulation layer 14；
S2. the electric heater 12 by arranging on floor in thermal chamber 10, by the heating temperatures in thermal chamber 10 to 400 DEG C, then, after a certain amount of air being heated to uniform temperature by air heater 13, from storage tank, feed tube passes into inner bag 2 and discharges from upper inlet；
S3. open vacuum pump 11, by storage tank being heated in thermal chamber 10 to uniform temperature, make the temperature in vacuum shell 3 raise, molecular motion aggravation in vacuum shell, reduce the time of evacuation, when storage tank uses at low temperature state, will be enhanced according to its vacuum of Clapyron Equation；
S4. at evacuation simultaneously as the thermal chamber heating to storage tank, binding molecule sieve is carried out further heat-activated, improves its absorption property.
The present invention keeps the long-term vacuum degree of vacuum shell also by optimization filling adsorption material and activation fill method: select N2And H2O is respectively provided with higher characterization of adsorption under cryogenic, in hot conditions can analytic properties binding molecule sieve 8 and hydrogen abstraction reaction material 9 be packed in vacuum shell 3.Hydrogen abstraction reaction material 9 not only hydrogen is had stronger adsorptivity but also can and equipment precipitate out H-H reaction generate H2O.Adiabator adopts laminated aluminium foil and glass fibre, and carries out mechanism between glass fibre and fill out charcoal, and the heat-insulating property of adiabator is improved.Adiabator 6 wraps up on inner bag, and is uniformly distributed with pore 7 on adiabatic village material 6, and the precipitated out hydrogen of inner bag stainless steel material can in time by reaction absorption.Molecular sieve has activated before filling, the heating-up temperature to storage tank when evacuation, controls the optimal activation temperature for molecular sieve, molecular sieve has been carried out re-activation, to improve its absorption property.Vacuum shell heat before evacuation in shell pass into hot nitrogen to shell in air replace, guarantee that in shell, gas is only nitrogen, during heating evacuation, nitrogen in shell is extracted out, molecular sieve is carried out denitrogenation activation, with vacuum pump, vacuum in vacuum shell is evacuated to the ultravacuum state meeting requirement, when LNG storage tank uses, minimal amount of nitrogen molecule will by molecular sieve adsorption, and its vacuum also can decline further.Storage tank all has a small amount of hydrogen molecule in the process mild steel material used and rustless steel and precipitates out.Hydrogen is not only had good adsorption and hydrogen reaction generation H by the hydrogen abstraction reaction material in vacuum shell2O molecule, H2The molecular sieve that O molecule can be loaded in shell adsorbs.Optimize filling adsorption material and optimize activation fill method, thus keeping the long-term vacuum degree of vacuum shell, with 60M3Storage tank is example, and in 5 years, vacuum can remain less than 10-2Pa, Daily boil-off-rate is less than 0.08%.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.Any those skilled in the art, equivalent variations done under without departing from the design of the present invention and the premise of principle and amendment, all should belong to the scope of protection of the invention.
Claims (8)
1. high-vacuum insulation low-temperature storage tank, including shell and inner bag, between described shell and inner bag, it is formed with vacuum shell, it is characterised in that: it is provided with at least one vacuum-pumping tube in described vacuum shell, described shell is stretched out in one end of described vacuum-pumping tube, and the other end extends in described vacuum shell；Described vacuum-pumping tube there is aspirating hole along tube length directional spreding；The lateral wall of described inner bag is coated with adiabator, is additionally provided with binding molecule sieve between described inner bag and described adiabator.
2. high-vacuum insulation low-temperature storage tank as claimed in claim 1, it is characterized in that: in described vacuum shell, be circumferentially evenly arranged with some vacuum-pumping tubes, the head end of described shell is stretched out in corresponding one end of described vacuum-pumping tube after converging mutually, the other end extends and respectively near the tail end to described shell in described vacuum shell.
3. high-vacuum insulation low-temperature storage tank as claimed in claim 2, it is characterised in that: described vacuum-pumping tube inner hollow, tube wall is multi-cellular structure.
4. high-vacuum insulation low-temperature storage tank as claimed in claim 3, it is characterised in that: described adiabator is that aluminium foil glass fibre carries out mechanism and adds charcoal and formed.
5. high-vacuum insulation low-temperature storage tank as claimed in claim 4, it is characterised in that: binding molecule sieve is evenly distributed on inner bladder outer wall, adiabator wrap up, described adiabator is evenly distributed with pore.
6. high-vacuum insulation low-temperature storage tank as claimed in claim 5, it is characterised in that: it is provided with hydrogen abstraction reaction material in described vacuum shell, is uniformly placed and is fixed on adiabator outer surface.
7. manufacture the method for high-vacuum insulation low-temperature storage tank as described in any one of claim 1 to 6, it is characterised in that: shorten the pumpdown time by the following method and improve the vacuum of storage tank；
S1. storage tank is placed in thermal chamber, and vacuum-pumping tube in storage tank is connected vacuum extractor；
S2. the electric heater by arranging on heat treatment indoor floor, improves the temperature in thermal chamber, and after then a certain amount of air being heated to uniform temperature, from storage tank, feed tube passes into inner bag and discharges from upper inlet；
S3. open vacuum extractor, by storage tank is heated control uniform temperature in thermal chamber, make the temperature in vacuum shell raise, molecular motion aggravation in vacuum shell, reduce the time of evacuation, when storage tank uses at low temperature state, its vacuum will be enhanced；
S4. at evacuation simultaneously as the thermal chamber heating to storage tank, binding molecule sieve is carried out further heat-activated.
8. method as claimed in claim 7, it is characterised in that: before to storage tank heat evacuation, in the vacuum shell of storage tank, pass into hot nitrogen, so that air in vacuum shell to be replaced.
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| CN201610142813.3A CN105715945A (en) | 2016-03-14 | 2016-03-14 | High-vacuum insulation low-temperature storage tank and manufacturing method thereof |
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| CN201610142813.3A CN105715945A (en) | 2016-03-14 | 2016-03-14 | High-vacuum insulation low-temperature storage tank and manufacturing method thereof |
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Cited By (10)
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| CN107774098A (en) * | 2017-12-09 | 2018-03-09 | 芜湖瑞德机械科技有限公司 | A kind of insulated gas cylinder molecular sieves compound material and preparation method |
| CN107965661A (en) * | 2017-12-08 | 2018-04-27 | 芜湖市海格瑞德科技有限责任公司 | A kind of high stability liquefied natural gas mounted gas cylinder |
| CN107983296A (en) * | 2017-12-09 | 2018-05-04 | 芜湖瑞德机械科技有限公司 | Insulated gas cylinder palladium oxide compound and preparation method |
| CN108006430A (en) * | 2017-12-09 | 2018-05-08 | 芜湖瑞德机械科技有限公司 | A kind of automobile-used air tank of liquefied natural gas |
| CN108006431A (en) * | 2017-12-09 | 2018-05-08 | 芜湖瑞德机械科技有限公司 | Insulated gas cylinder with excellent service life |
| CN110238608A (en) * | 2018-03-07 | 2019-09-17 | 恩凯 | The ultra-high purity gas filling assemble method of gas cylinder |
| CN110918025A (en) * | 2019-12-19 | 2020-03-27 | 靖江神驹容器制造有限公司 | Horizontal reaction kettle with molecular sieve adsorption function |
| CN111779975A (en) * | 2020-08-13 | 2020-10-16 | 王栋 | Combined polytetrafluoroethylene liquid hydrogen storage tank |
| CN111810829A (en) * | 2020-07-20 | 2020-10-23 | 江苏建业化工装备有限公司 | High vacuum heat insulation method for small low-temperature multilayer storage tank |
| CN116293407A (en) * | 2022-12-03 | 2023-06-23 | 杭州富士达特种材料股份有限公司 | Active nitrogen replacement vacuum multilayer heat insulation low-temperature container and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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