CN113236959A - Fixing and mounting mode of low-temperature film land storage tank insulation board for liquefied natural gas storage - Google Patents

Fixing and mounting mode of low-temperature film land storage tank insulation board for liquefied natural gas storage Download PDF

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Publication number
CN113236959A
CN113236959A CN202110612314.7A CN202110612314A CN113236959A CN 113236959 A CN113236959 A CN 113236959A CN 202110612314 A CN202110612314 A CN 202110612314A CN 113236959 A CN113236959 A CN 113236959A
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China
Prior art keywords
plate
bottom plate
natural gas
outer tank
concrete outer
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CN202110612314.7A
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Chinese (zh)
Inventor
魏颖
陈世福
何炜
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China Pacific Maritime Technology Shanghai Co ltd
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China Pacific Maritime Technology Shanghai Co ltd
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Priority to CN202110612314.7A priority Critical patent/CN113236959A/en
Publication of CN113236959A publication Critical patent/CN113236959A/en
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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
    • 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
    • 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
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/081—Mounting arrangements for vessels for large land-based storage vessels
    • 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
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • 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
    • F17C2203/0621—Single wall with three layers
    • 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
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • 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
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • 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
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0678—Concrete
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/0126—One vessel
    • 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
    • F17C2209/21—Shaping processes
    • F17C2209/219—Working processes for non metal materials, e.g. extruding
    • 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
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2209/22—Assembling processes
    • F17C2209/227—Assembling processes by adhesive means
    • 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
    • F17C2209/22—Assembling processes
    • F17C2209/228—Assembling processes by screws, bolts or rivets
    • 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
    • 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

Abstract

The invention discloses a fixing and mounting mode of an insulating plate of a low-temperature film land storage tank for storing liquefied natural gas, which comprises a concrete outer tank, a bottom plate, a pre-embedded metal plate, an anchoring bolt, an insulating plate fixing stud, a heat-insulating plate and a moisture-proof isolating layer. The pre-buried metal plate is pre-selected, laid and installed during construction of the concrete outer tank and the bottom plate, the inner surfaces of the concrete outer tank and the bottom plate are provided with the moisture-proof isolation layers, the insulation plate fixing studs are installed on the pre-buried metal plate through a resistance welding machine, resin glue is coated on the back surface of the insulation plate, and the insulation plate is installed and fixed on the inner walls of the concrete outer tank and the bottom plate through the insulation plate fixing studs. The invention replaces the installation mode of drilling holes in the concrete and on the bottom plate and installing expansion bolts, and the design not only improves the safety of the low-temperature film storage tank, but also lightens the construction workload, shortens the construction period, improves the equipment safety, and can realize the concept of environmental protection.

Description

Fixing and mounting mode of low-temperature film land storage tank insulation board for liquefied natural gas storage
Technical Field
The invention relates to the technical field of Liquefied Natural Gas (LNG) low-temperature storage devices, in particular to a fixed mounting mode of a low-temperature film land storage tank insulating plate for liquefied natural gas storage.
Background
Liquefied Natural Gas (LNG) has been the first choice of energy for petroleum substitution due to its advantages of being green, environment-friendly and efficient, and has become one of the most rapidly developing energy industries in the world. With the rapid development of economy and the continuous improvement of the requirement on environmental management in China, the application and development of LNG are more and more emphasized by all parties, and particularly under the condition of frequent haze weather, the importance of LNG is more and more prominent, thereby causing the rapid increase of the demand of the society on clean energy. LNG is one of the key directions for the development of clean energy in China in the future. Data from claxon show that over the past five years, the sea traffic of LNG imports in china has been increasing: 3826 ten thousand tons in 2017, 4869 ten thousand tons in 2018, and the growth rate is 27 percent on the same scale.
The LNG receiving station mainly comprises dock unloading, LNG storage, process treatment and export, and the LNG storage tank which has the storage task has the longest construction period, the most advanced technology and the most difficult point in the engineering construction process, and is always managed as a critical path of the whole engineering. The full-capacity 9% Ni steel type LNG storage tank is the most widely applied storage tank type, and with the falling of the first-seat land-based LNG thin-film tank construction project in China, the internal structure form and technological innovation of the thin-film type LNG storage tank are also the key points of attention of people in the same industry in China and abroad.
Disclosure of Invention
The invention provides a fixing and mounting mode of a low-temperature film land storage tank insulating plate for liquefied natural gas storage, which solves the problem that the integrity of a moisture-proof isolation layer and a concrete outer tank needs to be damaged by the existing fixing bolt of the film land storage tank insulating plate, improves the safety of a low-temperature film storage tank, reduces the construction workload, shortens the construction period, improves the safety of equipment, and can realize the concept of environmental protection.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fixed mounting mode that is used for low temperature film land storage tank insulation board that liquefied natural gas stored, includes concrete outer tank and bottom plate, pre-buried metal sheet, anchor bolt, insulation board fixing stud, heat preservation insulation board and dampproofing isolation layer are constituteed. The pre-buried metal plate is pre-selected and laid and installed during construction of the concrete outer tank and the bottom plate, moisture-proof isolation layers for isolating water vapor by epoxy are installed on the inner surfaces of the concrete outer tank and the bottom plate, the insulation plate fixing studs are installed on the pre-buried metal plate through a resistance welding machine, resin glue is coated on the back of the insulation plate, and the insulation plate is installed and fixed on the inner walls of the concrete outer tank and the bottom plate through the insulation plate fixing studs.
As a preferred embodiment of the invention, the material of the embedded metal plate can be low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel, the thickness of the embedded metal plate is 3mm-50mm, and the width of the embedded metal plate is 10-1000 mm.
In a preferred embodiment of the present invention, the pre-buried metal plate must be pre-buried during the construction of the concrete outer tank and the bottom plate, and the back surface of the pre-buried metal plate is welded with different types of anchor bolts, such as L-shaped, I-shaped, H-shaped, J-shaped, T-shaped, etc., and is buried in the concrete to perform anchoring and fixing functions.
As a preferred embodiment of the present invention, the embedded metal plates are divided into different grid forms and arranged on the inner walls of the concrete outer tank and the bottom plate.
As a preferred embodiment of the invention, the surface of the embedded metal plate is exposed on the inner surfaces of the concrete outer tank and the bottom plate, and moisture-proof isolation layers for isolating water vapor are arranged on the inner surfaces of other concrete outer tanks and the bottom plate.
As a preferred embodiment of the invention, the moisture-proof isolation layer can be sprayed with epoxy glue, and an adhesion test is required to ensure that the glue is complete and does not fall off, so that the moisture-proof isolation layer has reliable air tightness. Or low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel with the thickness of 2mm-15mm can be selected, and flaw detection is needed to ensure the air tightness.
According to a preferred embodiment of the invention, insulating plate fixing studs are welded on the surfaces of the embedded metal plates, the studs are M8-M16, and each embedded metal plate is welded with 6-12 studs for fixing the heat-insulating plate.
As a preferred embodiment of the invention, the back surface of the heat-insulating plate is leveled with the concrete outer tank and the bottom plate by coating resin glue, and the coating thickness of the resin glue is 3-50 mm.
As a preferred embodiment of the present invention, the embedded metal plates should be subjected to corresponding tensile tests in the concrete outer tank and the bottom plate.
As a preferred embodiment of the present invention, the insulation board fixing stud is fixed on the embedded metal plate by resistance welding or manual welding, and the fixing method should perform a corresponding tensile test.
Compared with the prior art, the invention has the following beneficial effects:
1. the fixing and mounting mode of the insulation board of the low-temperature film land storage tank for storing liquefied natural gas is different from the mounting mode of the existing insulation board fixing bolt, the existing fixing bolt needs to drill holes in the concrete outer tank and the inner part of the bottom board, damage the moisture-proof isolation layer, mount the embedded expansion bolt, and then smear the sealing glue. The embedded metal plates are well installed when the concrete outer tank and the bottom plate are constructed, the inner wall structure of the concrete outer tank, the water tightness of the moisture-proof isolation layer and the concrete inner reinforcing steel bar structure cannot be damaged due to the fact that holes are drilled in the existing installation mode, the use of sealing glue in the installation process of the stud and the expansion bolt is reduced, the integrity of the concrete outer tank and the inner wall of the bottom plate, the moisture-proof isolation layer and the reinforcing steel bar structure is guaranteed, and the safety and the environmental friendliness of the film storage tank are further improved.
2. The fixing and mounting mode of the insulating plate of the low-temperature film land storage tank for storing liquefied natural gas saves the mounting time of drilling and coating sealing glue, saves the workload, directly mounts the insulating plate fixing stud on the embedded metal plate through the resistance welding machine after the bolt position is well positioned by marking the whole tank, reduces the construction workload and shortens the construction period.
Drawings
FIG. 1 is a schematic view of the installation of the low temperature thin film land tank insulation panel of the present invention;
FIG. 2 is a structural view of a pre-buried metal plate according to the present invention;
FIG. 3 is a structural diagram of different anchor bolts of the pre-buried metal plate according to the present invention;
in the figure: 1. concrete outer tank and bottom plate, 2, pre-buried metal plate, 3, anchor bolt, 4, insulation board fixing stud, 5, heat preservation insulation board, 6, dampproof isolation layer
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1 to 3, the present invention provides a fixing and mounting method for an insulation plate of a low-temperature thin-film land tank for liquefied natural gas storage, which is designed to ensure the integrity of a concrete outer tank and a bottom plate 1, improve the safety of the low-temperature thin-film storage tank, reduce the construction workload, shorten the construction period, improve the safety of equipment, and realize the concept of environmental protection.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fixed mounting mode that is used for low temperature film land storage tank insulation board that liquefied natural gas stored, includes concrete outer tank and bottom plate 1, pre-buried metal sheet 2, anchor bolt 3, insulation board fixing stud 4, heat preservation insulation board 5 and dampproofing isolation layer 6 constitution. The pre-buried metal plate is pre-selected and laid and installed during construction of the concrete outer tank and the bottom plate, the epoxy moisture-proof isolation layer 6 for isolating water vapor is installed on the inner surfaces of the concrete outer tank and the bottom plate 1, the insulation plate fixing studs 4 are installed on the pre-buried metal plate 2 through a resistance welding machine, resin glue is coated on the back surface of the heat-insulating insulation plate 5, and the heat-insulating insulation plate 5 is installed and fixed on the inner walls of the concrete outer tank and the bottom plate 1 through the insulation plate fixing studs 4.
As a preferred embodiment of the invention, the material of the embedded metal plate 2 can be low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel, the thickness of the embedded metal plate is 3mm-50mm, and the width is 10-1000 mm.
In a preferred embodiment of the present invention, the pre-buried metal plate 2 must be pre-buried during the construction of the concrete outer tank and the bottom plate 1, and the back surface of the pre-buried metal plate 2 is welded with different types of anchor bolts 3, such as L-shaped, I-shaped, H-shaped, J-shaped, T-shaped, etc., and is buried in the concrete to perform anchoring and fixing functions.
As a preferred embodiment of the present invention, the embedded metal plates 2 are divided into different grid forms and arranged on the inner walls of the concrete outer tank and the bottom plate 1.
As a preferred embodiment of the invention, the surface of the embedded metal plate 2 is exposed on the inner surfaces of the concrete outer tank and the bottom plate 1, and the moisture-proof isolation layer 6 for isolating water vapor is arranged on the inner surfaces of other concrete outer tanks and the bottom plate 1.
As a preferred embodiment of the invention, the moisture-proof isolation layer 6 can be sprayed with epoxy glue, and an adhesion test is required to ensure that the glue is complete and does not fall off, so that the moisture-proof isolation layer has reliable air tightness. Or low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel with the thickness of 2mm-15mm can be selected, and flaw detection is needed to ensure the air tightness.
According to a preferred embodiment of the invention, insulating plate fixing studs 4 are welded on the surfaces of the embedded metal plates 2, the studs are selected from M8-M16, and 6-12 studs are welded on each embedded metal plate 2 and used for fixing the heat-insulating plate 5.
As a preferred embodiment of the invention, the back surface of the heat-insulating plate 5 is leveled with the concrete outer tank and the bottom plate 1 by coating resin glue, and the coating thickness of the resin glue is 3-50 mm.
As a preferred embodiment of the present invention, the embedded metal plate 2 should be subjected to corresponding tensile tests in the concrete outer tank and the bottom plate 1.
As a preferred embodiment of the present invention, the insulating plate fixing stud 4 is fixed on the embedded metal plate 2 by resistance welding or manual welding, and the fixing method should perform a corresponding tensile test.
The fixing and mounting mode of the insulation board of the low-temperature film land storage tank for storing liquefied natural gas is different from the mounting mode of the existing insulation board fixing bolt, the existing fixing bolt needs to punch holes in the concrete outer tank and the bottom board, damage the moisture-proof isolation layer, mount the embedded expansion bolt, and then smear the sealing glue. The embedded metal plates are well installed when the concrete outer tank and the bottom plate are constructed, so that the integrity of the inner walls of the concrete outer tank and the bottom plate 1 and the integrity of the moisture-proof isolation layer 6 are ensured, and the safety of the film storage tank is further improved.
The invention saves the installation time of punching and coating sealing glue, saves the workload, directly installs the insulation board fixing stud 4 on the embedded metal plate 2 by the resistance welding machine after the bolt position is well positioned by the whole tank marking, lightens the construction workload and shortens the construction period.
Example 1
The design that a construction platform scaffold needs to be erected when the concrete outer tank and the bottom plate 1 are built is as follows: a whole set of modularized scaffold needs to be designed in the construction process, a corresponding working platform and a corresponding storage platform are provided, and the designed strength and safety performance stress need to meet the standard requirements.
Before the concrete outer tank and the bottom plate 1 are poured, the embedded metal plate 2 needs to be fixed and fixed in a concrete reinforcement framework, the anchor bolt 3 is fixed on one side of concrete, one side of a flat plate is flush with the inner wall of the tank body, the levelness and the verticality of the flat plate are guaranteed to meet certain requirements, the basic positioning allowable deviation cannot exceed +/-20 mm, and the pouring work of the concrete outer tank and the bottom plate can be carried out after measurement and inspection.
Example 2
Installation of the moisture-proof isolation layer 6: considering to keep the airtight of intermediate layer, preventing that the gaseous entering inner tank heat insulation layer space of jar outside, playing the isolation simultaneously and preventing it to pass through the concrete seepage to the outside after the thin film inner tank heat insulation layer is revealed to LNG, need carry out the installation of dampproofing isolation layer 6 to it after concrete outer tank and the completion of bottom plate 1 inner wall are complete. Considering the tightness of the embedded metal plate 2, the concrete outer tank and the inner wall of the bottom plate 1, the coating of the moisture-proof isolation layer is carried out after the fixing stud 4 is installed.
Spraying epoxy glue can be selected for use to dampproofing isolation layer 6, need do the adhesion test and guarantee that glue is complete and not fall off, has reliable gas tightness. Or low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel with the thickness of 2mm-15mm can be selected, and flaw detection is needed to ensure the air tightness.
After the moisture-proof isolation layer is inspected to be qualified, the inner surface of the concrete tank needs to be cleaned and dedusted well, and grease, rust, dust and other garbage are avoided. After the moisture-proof isolation layer 6 is installed, the concrete outer tank should be subjected to a hydrostatic test.
Example 3
Welding of the insulating fixing bolt 4: the heat insulation board 5 of the low-temperature film land storage tank consists of a prefabricated glass fiber reinforced polyurethane foam insulation board, and is paved on the concrete outer tank and the inner wall of the bottom plate 1 and fixed through the insulation board fixing studs 4 to transfer the liquid gravity.
Through laser marking off and location, fix a position all insulating fixing bolt 4 in the jar, because the existence of pre-buried metal sheet 2, all insulating fixing bolt 4 location all fall on the dull and stereotyped region of pre-buried metal sheet 2, through resistance welder, directly with insulating fixing bolt 4 welding on pre-buried metal sheet 2, through corresponding tensile test at last, guarantee welded firm performance, accomplished insulating fixing bolt 4's welding promptly.
Example 4
Installation of the heat-insulating plate 5: the heat-insulating plate is fixed on the concrete outer tank and the bottom plate 1 through insulating fixing bolts 4, and resin glue with the thickness of 3mm-50mm is bonded on the contact surface of each insulating panel and the tank body in consideration of the contact strength of the insulating panels and the outer tank, so that the requirement of the insulating panels on the flatness is met. As the resin glue has compressibility before hardening, the resin glue can be fully contacted with the concrete outer tank and the bottom plate 1 in an extruding mode in the process of installing the heat-insulating plate 5, so that the gravity in the tank can be fully pressed on the tank body. And the insulating plate is initially screwed and fixed by a stainless steel gasket or a pressing plate and a nut, whether the insulating plate is completely contacted and attached with the wedge block is checked, the final position and the height of the insulating plate are adjusted by a special tool, the height difference between two adjacent insulating plates is controlled to be less than +/-0.5mm, and a complete secondary insulating plate plane is finally formed. The torque wrench is used for ensuring that the locking force of each bolt is within the design range, so that the heat-insulating plate 5 is not damaged, and the installation strength is also ensured.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The utility model provides a fixed mounting mode that is used for low temperature film land storage tank insulation board that liquefied natural gas stored, includes outer jar of concrete and bottom plate (1), pre-buried metal sheet (2), anchor bolt (3), insulation board fixing stud (4), heat preservation insulation board (5) and dampproofing isolation layer (6) are constituteed. The pre-buried metal plate (2) is pre-selected and laid and installed during construction of the concrete outer tank and the bottom plate (1), a moisture-proof isolation layer is installed on the inner surface of the concrete outer tank, the insulation plate fixing studs (4) are installed on the pre-buried metal plate through a resistance welding machine, resin glue is coated on the back of the insulation plate (5), and the insulation plate (5) is installed and fixed on the inner walls of the concrete outer tank and the bottom plate (1) through the insulation plate fixing studs (4).
2. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the material of the embedded metal plate (2) can be low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel, the thickness of the embedded metal plate (2) is 3mm-50mm, and the width of the embedded metal plate is 10-1000 mm.
3. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the pre-buried metal plate (2) is pre-buried in the construction period of the concrete outer tank and the bottom plate (1), the reverse side of the pre-buried metal plate (2) is welded with anchoring bolts (3) of different types, such as L-shaped, I-shaped, H-shaped, J-shaped or T-shaped, and the pre-buried metal plate is buried in the concrete to play a role in anchoring and fixing.
4. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the embedded metal plates (2) are divided into different grid forms and are arranged on the inner walls of the concrete outer tank and the bottom plate (1).
5. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the surface of the embedded metal plate (2) is exposed on the inner surfaces of the concrete outer tank and the bottom plate (1), and the inner surfaces of the concrete outer tank and the bottom plate (1) are provided with a moisture-proof isolation layer (6) for isolating water vapor.
6. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: spraying epoxy glue can be selected for use to dampproofing isolation layer (6), need do the adhesion test and guarantee that glue is complete and not drop, has reliable gas tightness. Or low-temperature carbon steel or stainless steel or 9 nickel steel or low-temperature high manganese steel with the thickness of 2mm-15mm can be selected, and flaw detection is needed to ensure the air tightness.
7. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: insulating plate fixing studs (4) are welded on the surfaces of the embedded metal plates (2), the studs are selected from M8-M16, and 6-12 studs are welded on each embedded metal plate (2) and used for fixing the heat-insulation insulating plates (5).
8. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the back of the heat-insulating plate (5) is leveled with the inner walls of the concrete outer tank and the bottom plate (1) by coating resin glue, and the coating thickness of the resin glue is 3-50 mm.
9. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the embedded metal plate (2) is subjected to corresponding tension tests in the concrete outer tank and the bottom plate (1).
10. The fixed mounting of the cryogenic membrane land tank insulation panel for liquefied natural gas storage according to claim 1, wherein: the insulating plate fixing stud (4) is fixed on the embedded metal plate (2) in a resistance welding or manual welding mode, and a corresponding tension test is carried out in the fixing mode.
CN202110612314.7A 2021-06-02 2021-06-02 Fixing and mounting mode of low-temperature film land storage tank insulation board for liquefied natural gas storage Pending CN113236959A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115854249A (en) * 2022-11-24 2023-03-28 沪东中华造船(集团)有限公司 Method for adhering stainless steel in 173.6-degree angle area of film tank
CN117028827A (en) * 2023-10-09 2023-11-10 中太海碳(上海)环保科技有限公司 Fixing module of low-temperature film storage container and low-temperature film storage container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115854249A (en) * 2022-11-24 2023-03-28 沪东中华造船(集团)有限公司 Method for adhering stainless steel in 173.6-degree angle area of film tank
CN117028827A (en) * 2023-10-09 2023-11-10 中太海碳(上海)环保科技有限公司 Fixing module of low-temperature film storage container and low-temperature film storage container

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