CN205447250U - High high vacuum insulation low temperature storage tank - Google Patents
High high vacuum insulation low temperature storage tank Download PDFInfo
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- CN205447250U CN205447250U CN201620194063.XU CN201620194063U CN205447250U CN 205447250 U CN205447250 U CN 205447250U CN 201620194063 U CN201620194063 U CN 201620194063U CN 205447250 U CN205447250 U CN 205447250U
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- vacuum
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- storage tank
- inner bag
- temperature storage
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Abstract
The utility model relates to a low temperature pressure vessel technical field, concretely relates to high high vacuum insulation low temperature storage tank. High high vacuum insulation low temperature storage tank, including shell and inner bag, be formed with the vacuum shell between shell and the inner bag, be provided with an at least vacuum tube in the shell of vacuum, vacuum tube's one end is stretched out the shell, the other end to extend in the shell of vacuum, vacuum tube is last to have the aspirating hole along the pipe length direction distribution, the lateral wall cladding of inner bag has heat -insulating material, the inner bag with still be provided with the absorption molecular sieve between the heat -insulating material. The utility model discloses storage tank vacuum time is short, vacuum is high, adiabatic nature is good, can keep the high vacuum degree for a long time, has good sealed heat preservation effect.
Description
Technical field
This utility model relates to low-temperature pressure container field, is specifically related to a kind of low-temperature storage tank that vacuum shell carries out adiabatic optimization design, and 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 being cooled to-162 DEG C, being allowed to condense into liquid.After natural gas liquefaction can the biggest 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, the i.e. 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 with shell support and pipeline fittings device etc. inner pressurd vessel (inner bag), shell, vacuum heat-insulating layer, inner pressurd vessel.Existing ultravacuum be wound around LNG storage tank exist pumpdown time length and vacuum can not the problem such as ultravacuum degree holding for a long time, there is a need to improve further.
Utility model content
In order to solve above-mentioned technical problem, the purpose of this utility model is 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 technical scheme that this utility model employing is following:
High-vacuum insulation low-temperature storage tank, including shell and inner bag, is formed with vacuum shell, is provided with at least 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, has trapping and adsorption to gas；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 further preferably, described adiabator is that aluminium foil glass fibre carries out mechanism and adds charcoal and formed, and this material not only has absorption property to gas, 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 further preferably, 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 further preferably, being provided with hydrogen abstraction reaction material in described vacuum shell, it is uniformly placed and is fixed on adiabator outer surface.
This utility model has the 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 is placed on thermal chamber and be heated to uniform temperature, the hot-air in thermal chamber is blown in storage tank so that molecular motion aggravates, thus reduces 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 schematically illustrating this utility model and explaining, not limit scope of the present utility model.Wherein:
Fig. 1 is the structural representation of this utility model embodiment；
Fig. 2 is the partial structurtes schematic diagram of this utility model embodiment；
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 this utility model embodiment 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 the accompanying drawings and embodiment, this utility model is expanded on further.In the following detailed description, only by the way of explanation, some one exemplary embodiment of the present utility model is described.Undoubtedly, those of ordinary skill in the art will be consequently realised that, in the case of without departing from spirit and scope of the present utility model, can be modified described embodiment by various different modes.Therefore, accompanying drawing and description are inherently the most 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, in Fig. 3 as a example by four, 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；The micropore 5 of special construction (in cellular layout) is had along tube length direction, with reference to Fig. 4 and Fig. 5 on described vacuum-pumping tube 4；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；It is provided with in described vacuum shell 3 adsorbing N2And 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.
This utility model 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, as a example by 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 become, vacuum-pumping tube structure of the present utility model, the time of evacuation will be greatly reduced, improve its vacuum.
Refer to Fig. 6, this utility model storage tank, when evacuation, uses following methods to carry out:
S1. storage tank is placed in thermal chamber 10, in vacuum shell 3, is first passed through hot nitrogen 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. by the electric heater 12 arranged on floor in thermal chamber 10, temperature in thermal chamber 10 is heated 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 is passed through inner bag 2 and discharges from upper inlet；
S3. open vacuum pump 11, by storage tank being heated to uniform temperature in thermal chamber 10, 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., while evacuation, due to the thermal chamber heating to storage tank, binding molecule sieve is carried out further heat-activated, improves its absorption property.
This utility model 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 separate out hydrogen reaction generate H2O.Adiabator uses 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 separated out hydrogen of inner bag stainless steel material can be adsorbed by reaction in time.Molecular sieve is 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 heating evacuation before to shell in be passed through hot nitrogen to shell in air replace, in guaranteeing shell, gas is only nitrogen, during heating evacuation, nitrogen in shell is extracted out, molecular sieve is carried out denitrogenation activation, it is evacuated to meet the ultravacuum state required by vacuum in vacuum shell with vacuum pump, when LNG storage tank uses, minimal amount of nitrogen molecule will be by molecular sieve adsorption, and its vacuum also can decline further.Storage tank carbon steel material and rustless steel during using all have a small amount of hydrogen molecule and separate out.Hydrogen abstraction reaction material in vacuum shell not only has preferable adsorption, and and hydrogen reaction generation H to hydrogen2O 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 60M3As a example by storage tank, 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 this utility model, be not limited to scope of the present utility model.Any those skilled in the art, equivalent variations done on the premise of without departing from design of the present utility model and principle and amendment, the scope of this utility model protection all should be belonged to.
Claims (6)
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 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；Aspirating hole is had along tube length directional spreding on described vacuum-pumping tube；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 aluminium foil glass fibre and mechanism adds Carbon Materials.
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. the high-vacuum insulation low-temperature storage tank as described in any one of claim 1 to 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620194063.XU CN205447250U (en) | 2016-03-14 | 2016-03-14 | High high vacuum insulation low temperature storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620194063.XU CN205447250U (en) | 2016-03-14 | 2016-03-14 | High high vacuum insulation low temperature storage tank |
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| CN205447250U true CN205447250U (en) | 2016-08-10 |
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| CN201620194063.XU Expired - Fee Related CN205447250U (en) | 2016-03-14 | 2016-03-14 | High high vacuum insulation low temperature storage tank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715945A (en) * | 2016-03-14 | 2016-06-29 | 江苏德邦工程有限公司 | High-vacuum insulation low-temperature storage tank and manufacturing method thereof |
| CN112407643A (en) * | 2020-09-04 | 2021-02-26 | 中车西安车辆有限公司 | Low-temperature adsorption device for tank interlayer and working method |
| WO2022117013A1 (en) * | 2020-12-03 | 2022-06-09 | 江苏国富氢能技术装备股份有限公司 | Low-temperature vehicle-mounted liquid hydrogen cylinder |
-
2016
- 2016-03-14 CN CN201620194063.XU patent/CN205447250U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715945A (en) * | 2016-03-14 | 2016-06-29 | 江苏德邦工程有限公司 | High-vacuum insulation low-temperature storage tank and manufacturing method thereof |
| CN112407643A (en) * | 2020-09-04 | 2021-02-26 | 中车西安车辆有限公司 | Low-temperature adsorption device for tank interlayer and working method |
| CN112407643B (en) * | 2020-09-04 | 2022-04-12 | 中车西安车辆有限公司 | Low-temperature adsorption device for tank interlayer and working method |
| WO2022117013A1 (en) * | 2020-12-03 | 2022-06-09 | 江苏国富氢能技术装备股份有限公司 | Low-temperature vehicle-mounted liquid hydrogen cylinder |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| 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: 20160810 |