CN110902178A - Low-temperature storage device and installation method thereof - Google Patents
Low-temperature storage device and installation method thereof Download PDFInfo
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- CN110902178A CN110902178A CN201911409687.3A CN201911409687A CN110902178A CN 110902178 A CN110902178 A CN 110902178A CN 201911409687 A CN201911409687 A CN 201911409687A CN 110902178 A CN110902178 A CN 110902178A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/028—Wall construction hollow-walled, e.g. double-walled with spacers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a low temperature storage device, includes metal inner tank, outer jar and heat preservation, the heat preservation is located between inner tank and the outer jar, its characterized in that: adopt anchor plate, double-deck heated board and fold metal film structure at the tank bottoms and jar wall, accompany one deck secondary shielding layer between the double-deck heated board, below secondary shielding layer, install temperature sensor and seepage detecting system between heated board and the heated board for monitoring system's operation conditions and security. And to provide a method of installing a cryogenic storage device. The invention provides a low-temperature storage device which is simplified in structure, simpler and more convenient in installation and construction process and lower in cost and an installation method thereof.
Description
Technical Field
The invention relates to a low-temperature storage device and an installation method thereof.
Background
The investment of the LNG storage tank is higher in both a natural gas liquefaction plant and an LNG receiving terminal, especially in the LNG receiving terminal, the investment of the storage tank accounts for about 30-40% of the total investment, and the LNG storage tank is a very important component in the whole LNG industry chain.
The LNG storage tank is used for storing ultralow-temperature LNG (liquefied natural gas) liquid at the temperature of 162 ℃ below zero, and in order to enable the liquid in the storage tank to be in an ultralow-temperature state, heat insulation materials are arranged on the tank wall, the tank bottom and the tank top of the storage tank. Due to the outer rib structure of the inner tank of the novel self-supporting LNG storage tank composite structure, the traditional insulation scheme of the inner side elastic felt and the outer side expanded perlite tank wall has the problems of loose materials, settlement deformation, unstable long-term insulation performance, short service life and the like.
The existing storage tank is mainly a single-capacity tank, a double-capacity tank and a full-capacity tank:
the single-vessel tank is usually a vertical flat-bottomed cylindrical storage tank, and consists of an inner tank and an outer tank. The inner tank material is low temperature resistant stainless steel for store microthermal LNG, outer jar generally by the carbon steel preparation, the insulating layer of work is maintained at the inner tank low temperature to mainly used fixed and protection, nevertheless can not hold LNG. When the storage tank is in accident and the inner tank storing LNG is leaked, LNG damages the outer tank and spreads to a larger area, thus causing larger harm. Therefore, the single-container tank is required to be provided with the cofferdam, and the single-container tank needs a larger safety protection interval and occupies a larger area in the engineering design according to the standard requirement. The bottom and the side wall of the storage tank are provided with connecting pipes, so that the hidden danger of gas and liquid leakage is easily caused by the lack of construction quality in the engineering construction. In contrast, the leakage probability is high, the strength is low, and the safety performance is poor. Single-tank tanks have been used less frequently in large LNG production plants in recent years due to their lower safety than other types of tanks.
The design pressure of the storage tank of the double-container tank is the same as that of the single-container tank (both are lower), and a return gas compressor is also required to be arranged. The investment of the double-container tank is slightly higher than that of the single-container tank, about 110 percent of that of the single-container tank, and the construction period is slightly longer than that of the single-container tank.
Compared with a full-capacity tank, the double-capacity tank has about the same investment and delivery cycle, but the safety level is lower, and the existing storage tank is designed to be old and not selected. In addition, although the full-capacity tank has good safety and small occupied area, the structure is complex, the construction period is long, and the construction cost is high.
The conventional large-scale low-temperature storage tank is composed of a metal inner tank, a concrete outer tank and a heat insulation layer between the inner tank and the outer tank. The bottom of the tank body is sequentially composed of a concrete outer tank metal bottom plate, a concrete layer, a foam glass layer, a concrete layer, a secondary bottom plate, a prestressed concrete layer and an inner tank metal bottom plate from bottom to top; the tank wall part sequentially comprises structures such as a concrete outer tank, an outer tank metal lining plate, a foam glass layer, a thermal angle protection wall plate, a perlite heat insulation layer, an elastic felt heat insulation layer and a metal inner tank from outside to inside, the whole structure is very complex, the installation and construction process is complicated and has high requirements, and construction in each step must be completed on site sequentially, so that the site construction quality requirement is high, the quality control is difficult, and the construction period is long. A secondary bottom plate is arranged between the metal inner tank and the outer tank bottom plate at the bottom of the tank body, a thermal angle protection is arranged between the metal inner tank and the outer tank at the tank wall part, the metal inner tank, the secondary bottom plate and the thermal angle protection are generally made of low-temperature steel with the thickness of 1-2 cm, the manufacturing cost is very high, and the construction welding requirement is very high. The whole inner tank and the secondary bottom plate are flat, and the hot corner protection, the metal outer tank and the secondary bottom plate are welded into a sealed whole. Take a 16 ten thousand cubic LNG storage tank as an example, its inner tank diameter is 80 meters more, when driving, can have nearly 200 ℃ temperature variation, and different structural layers all can produce the shrink of different degree, and the inner tank has the shrink of about 25 centimetres, and the inner tank is a smooth whole, and the shrink can produce the displacement between the different layers, and the effort each other is very big, in case cause the destruction, will exert an influence to the heat preservation effect, causes the running cost height, can have the safety problem even.
Disclosure of Invention
In order to overcome the defects of complex structure, complex installation and construction process, extremely high requirement and high cost of the existing large-scale low-temperature storage tank, the invention provides the low-temperature storage device which has the advantages of simplified structure, simpler and more convenient installation and construction process and lower cost and the installation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a low temperature storage device, includes metal inner tank, outer jar, furred ceiling and insulation construction, insulation construction is located between inner tank and the outer jar its characterized in that: adopt anchor plate, outer insulation construction layer, interior insulation construction layer and fold metal film inner tank structure at tank bottoms and tank wall, accompany one deck shielding layer between the inner and outer insulation construction layer, below the secondary shielding layer, install gaseous transport and monitoring system for low temperature storage device's operation protection and monitoring.
Further, the anchoring plate is fixed on the tank bottom and the tank wall through an anchoring part or an adhesive, and a cross-shaped fixing part is fixed on the upper surface of the anchoring plate and used for fixing the heat insulation structure layer adjacent to the anchoring plate and simultaneously fixedly connecting the metal inner tank.
And furthermore, the secondary shielding layer between the inner and outer heat-insulating structural layers is connected with the tank bottom and the tank wall to form a whole with air tightness, the secondary shielding layer is of a high-strength composite membrane structure, and the secondary shielding layer can be combined with the outer heat-insulating layer.
The anchor plate is double-deck insulation system layer structure, accompanies one deck seepage protective structure between two insulation system layers, and this seepage protective structure and secondary shielding layer sealing connection become one and have the whole of gas tightness ability.
The cross fixing piece is made of low-temperature-resistant metal materials, is in a cross shape, extends towards four sides, is embedded into a groove of the inner heat-insulating structure layer adjacent to the cross fixing piece, and is made of fireproof heat-insulating materials or is partially filled and fixed with the fireproof heat-insulating materials which are located right below a metal inner tank welding seam in contact with the inner heat-insulating structure layer.
A method of installing a cryogenic storage device, the method comprising the steps of:
1) detecting and correcting concrete at the bottom of the outer tank and the tank;
2) installing a suspended ceiling;
3) installing a tank wall ascending operation platform;
4) embedding an anchoring part;
5) hardening and moisture-proof treatment of concrete;
6) the fixed mounting of anchor board, the installation of outer insulation structure layer, temperature sensor and seepage detection system installation, secondary shielding layer installation and sealed, the installation of interior insulation structure layer, the installation of cross mounting, the installation welding of metal film inner tank.
In the step 6), the anchoring plate is fixedly installed, and the base is used for fixedly supporting the auxiliary equipment implementation.
In the step 6), the installation process of the outer heat-insulating structure layer is as follows: irregular parts and non-standard size parts are installed first.
And 6), carrying out air tightness test on the installation and sealing of the secondary shielding layer, and repairing and retesting parts which do not meet the requirements until the whole secondary shielding layer meets the air tightness requirement.
And 6), carrying out a weld leakage test on the installation and welding of the metal film inner tank, and repairing and retesting parts which do not meet the requirements until the whole metal inner tank has no leakage point.
The invention has the following beneficial effects: compare in traditional metal inner tank, secondary bottom plate and hot angle protection, the great saving of material, manufacturing cost can practice thrift more than 10%, and result of use and security obviously promote. And the whole system unit can be processed in a factory modularization mode, field splicing is carried out, and the construction efficiency is extremely high.
Drawings
Fig. 1 is a schematic structural view of a low temperature storage device.
Fig. 2 is a structural view at a of fig. 1.
Fig. 3 is a structural view at B of fig. 1.
Wherein, 1 is outer jar, 2 is the dome, 3 is the furred ceiling, 4 is top heat preservation, 5 is outer insulation structure layer, 6 is interior insulation structure layer, 7 is the secondary shielding layer, 8 is the metallic film inner tank.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, a low temperature storage device includes a metal film inner tank 8, an outer tank 1, a ceiling 3 and a heat insulation structure, the heat insulation structure is located between the inner tank and the outer tank, and is characterized in that: adopt anchor plate 9, outer insulation construction layer 5, interior insulation construction layer 6 and fold metal film inner tank 8 structure at tank bottoms and tank walls, accompany one deck shielding layer 7 between the inner and outer insulation construction layer, below secondary shielding layer 7, install gaseous transport and monitoring system for low temperature storage device's operation protection and monitoring.
Further, the anchoring plate 9 is fixed on the tank bottom 10 and the tank wall 11 through an anchoring part or an adhesive, and a cross-shaped fixing part is fixed on the upper surface of the anchoring plate 9 and used for fixing the heat insulation structure layer adjacent to the anchoring plate and simultaneously used for fixedly connecting the metal inner tank.
Still further, the secondary shielding layer 7 between the inner and outer heat-insulating structural layers is connected with the tank bottom 10 and the tank wall 11 to form a whole with air tightness, the secondary shielding layer 7 is of a high-strength composite membrane structure, and the secondary shielding layer 7 can be combined with the outer heat-insulating structural layer 5.
The anchoring plate 9 is a double-layer heat insulation system structure, a layer of leakage protection structure is clamped between two heat insulation system layers, and the leakage protection structure and the secondary shielding layer are hermetically connected into a whole with air tightness.
The cross fixing piece is made of low-temperature-resistant metal materials, is in a cross shape, extends towards four sides, is embedded into a groove of the inner heat-insulating structure layer adjacent to the cross fixing piece, and is made of fireproof heat-insulating materials or is partially filled and fixed with the fireproof heat-insulating materials which are located right below a metal inner tank welding seam in contact with the inner heat-insulating structure layer.
A method of installing the cryogenic storage device of claim 1, the method comprising the steps of:
1) detecting and correcting concrete of the outer tank 1 and the tank bottom 10;
2) installing a suspended ceiling 3;
3) installing a tank wall ascending operation platform;
4) embedding an anchoring part;
5) hardening and moisture-proof treatment of concrete;
6) the fixed mounting of anchor board 9, the installation of outer insulation structure layer 5, temperature sensor and seepage detection system installation, secondary shielding layer 7 installation and sealed, the installation of interior insulation structure layer 6, the installation of cross mounting, the installation welding of metallic film inner tank.
In the step 6), the anchoring plate is fixedly installed, and the base is used for fixedly supporting the auxiliary equipment implementation.
In the step 6), the installation process of the outer heat-insulating structure layer is as follows: irregular parts and non-standard size parts are installed first.
And 6), carrying out air tightness test on the installation and sealing of the secondary shielding layer, and repairing and retesting parts which do not meet the requirements until the whole secondary shielding layer meets the air tightness requirement.
And 6), carrying out a weld leakage test on the installation and welding of the metal film inner tank, and repairing and retesting parts which do not meet the requirements until the whole metal inner tank has no leakage point.
The invention thoroughly changes the structure and the installation and fixation mode of the existing low-temperature storage tank, only needs the metal inner tank with the thickness of 1-2 mm, directly cancels the secondary bottom plate and the hot angle protection steel plate, and adopts the secondary shielding layer with a composite film structure to protect leakage. By adopting the low-temperature metal film with longitudinal and transverse folds, the metal film can change the size change in a plane through the size change of the longitudinal and transverse folds in a temperature change range from normal temperature to-196 ℃ through stress analysis and fatigue experiments.
Compared with the traditional metal inner tank, secondary bottom plate and hot corner protection, the scheme of the embodiment has the advantages that the material is greatly saved, the manufacturing cost can be saved by more than 10%, and the using effect and the safety are obviously improved. And the whole system unit can be processed in a factory modularization mode, field splicing is carried out, and the construction efficiency is extremely high.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, which are intended for purposes of illustration only. The scope of the present invention should not be construed as being limited to the particular forms set forth in the examples, but rather as being defined by the claims and the equivalents thereof which can occur to those skilled in the art upon consideration of the present inventive concept.
Claims (10)
1. The utility model provides a low temperature storage device, includes metal inner tank, outer jar, furred ceiling and insulation construction, insulation construction is located between inner tank and the outer jar its characterized in that: adopt anchor plate, outer insulation construction layer, interior insulation construction layer and fold metal film inner tank structure at tank bottoms and tank wall, accompany one deck shielding layer between the inner and outer insulation construction layer, below the secondary shielding layer, install gaseous transport and monitoring system for low temperature storage device's operation protection and monitoring.
2. The cryogenic storage device of claim 1, wherein the anchor plate is fixed to the tank bottom and the tank wall by an anchor or an adhesive, and the cross fixing member is fixed to the upper surface of the anchor plate for fixing the thermal insulation structure layer adjacent to the anchor plate and for fixing and connecting the metal inner tank.
3. A cryogenic storage device according to claim 1 or claim 2, wherein the secondary barrier between the inner and outer insulating structural layers is a high strength composite film structure joined to form a gas tight integral with the tank bottom and tank wall.
4. A cryogenic storage device according to claim 2 wherein the anchor plate is a double insulation system layer with a leakage protection structure sandwiched between the two insulation system layers, the leakage protection structure and the secondary barrier being sealingly connected as a single unit having gas tight properties.
5. A cryogenic storage device as claimed in claim 2 or claim 4, wherein the cross fixture is made of a low temperature resistant metal material and is in a cross shape, the cross fixture extends to four sides and is embedded in a groove of the inner thermal insulation structure layer adjacent to the cross fixture, the inner thermal insulation structure layer is made of a fireproof thermal insulation material, or is partially filled and fixed with a fireproof thermal insulation material, and the fireproof thermal insulation material is located right below a welded joint of the inner metal tank in contact with the inner thermal insulation structure layer.
6. A method of installing a cryogenic storage device according to claim 1, the method comprising the steps of:
1) detecting and correcting concrete at the bottom of the outer tank and the tank;
2) installing a suspended ceiling;
3) installing a tank wall ascending operation platform;
4) embedding an anchoring part;
5) hardening and moisture-proof treatment of concrete;
6) the fixed mounting of anchor board, the installation of outer insulation structure layer, temperature sensor and seepage detection system installation, secondary shielding layer installation and sealed, the installation of interior insulation structure layer, the installation of cross mounting, the installation welding of metal film inner tank.
7. The method of claim 6, wherein the step 6) of fixedly installing the anchorage plate further comprises a base for fixedly supporting the auxiliary equipment implementation.
8. The method for installing a low-temperature storage device according to claim 6, wherein in the step 6), the process of installing the outer thermal insulation structure layer comprises the following steps: irregular parts and non-standard size parts are installed first.
9. The method of claim 6, wherein in step 6), the mounting and sealing of the secondary shielding layer are tested for airtightness, and the parts which do not meet the requirements are repaired and retested until the whole secondary shielding layer meets the airtightness requirement.
10. The method for mounting a cryogenic storage device as claimed in claim 4, wherein in step 6), the mounting welding of the metallic thin film inner tank is subjected to a weld leakage test, and the parts which do not meet the requirements are subjected to repair and retest until no leakage points exist in the whole metallic inner tank.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409687.3A CN110902178A (en) | 2019-12-31 | 2019-12-31 | Low-temperature storage device and installation method thereof |
| CN202080007070.3A CN113412389A (en) | 2019-12-31 | 2020-12-15 | Low-temperature storage device and installation method thereof |
| PCT/CN2020/136331 WO2021135917A1 (en) | 2019-12-31 | 2020-12-15 | Low-temperature storage device and installation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409687.3A CN110902178A (en) | 2019-12-31 | 2019-12-31 | Low-temperature storage device and installation method thereof |
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| CN110902178A true CN110902178A (en) | 2020-03-24 |
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| CN201911409687.3A Pending CN110902178A (en) | 2019-12-31 | 2019-12-31 | Low-temperature storage device and installation method thereof |
| CN202080007070.3A Pending CN113412389A (en) | 2019-12-31 | 2020-12-15 | Low-temperature storage device and installation method thereof |
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| WO (1) | WO2021135917A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547395A (en) * | 2020-05-15 | 2020-08-18 | 北京中储能能源设备有限公司 | Hazardous chemical liquid storage device |
| CN112944203A (en) * | 2021-03-22 | 2021-06-11 | 中海石油气电集团有限责任公司 | Heat preservation cold insulation circulation system based on phase change heat insulation material |
| CN112944202A (en) * | 2021-03-22 | 2021-06-11 | 中海石油气电集团有限责任公司 | LNG storage tank cold insulation structure based on metal reflection type heat insulation layer and installation method thereof |
| WO2021135917A1 (en) * | 2019-12-31 | 2021-07-08 | 浙江振申绝热科技股份有限公司 | Low-temperature storage device and installation method therefor |
| WO2021135916A1 (en) * | 2019-12-31 | 2021-07-08 | 浙江振申绝热科技股份有限公司 | Anchoring plate for low-temperature storage device |
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| CN112944202A (en) * | 2021-03-22 | 2021-06-11 | 中海石油气电集团有限责任公司 | LNG storage tank cold insulation structure based on metal reflection type heat insulation layer and installation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021135917A1 (en) | 2021-07-08 |
| CN113412389A (en) | 2021-09-17 |
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