CN216619329U - Perlite supplementing and filling system before large-volume LNG storage tank commissioning - Google Patents
Perlite supplementing and filling system before large-volume LNG storage tank commissioning Download PDFInfo
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- CN216619329U CN216619329U CN202123311687.5U CN202123311687U CN216619329U CN 216619329 U CN216619329 U CN 216619329U CN 202123311687 U CN202123311687 U CN 202123311687U CN 216619329 U CN216619329 U CN 216619329U
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Abstract
The utility model relates to a perlite supplementing and filling system before large-volume LNG storage tank commissioning, which comprises: the top of the storage tank is communicated with an annular space between the inner tank and the outer tank, and a plurality of perlite filling pipes are arranged on a concentric circle along a radial coordinate; the perlite filling connection ball valve is connected with the perlite filling pipe and used for controlling the filling of perlite; the filling port valve box system is connected with the perlite filling connection ball valve, is used for supplying power and perlite, and is arranged at the top of the storage tank; a filling hose connected to the filling port valve box system for transporting perlite to the filling port valve box system. The method can ensure the effect of the filling uniformity of the perlite on the wall of the storage tank along the circumferential direction, and improves the cold insulation performance and the operation efficiency of the storage tank.
Description
Technical Field
The utility model relates to the technical field of low-temperature storage of liquefied natural gas, in particular to a system for supplementing and filling expanded perlite cold insulation material before a large-volume LNG storage tank is put into operation.
Background
In order to assist the establishment of the national double-carbon and production, supply, storage and sale system, during the period of fourteen five and fifteen, the nation plans to establish a large amount of storage equipment and infrastructure in coastal areas. Due to increasingly scarce site resources and land utilization, the utilization of the existing planned site extension and the new construction of 20 ten thousand-square (or more) large-volume LNG storage tanks is beneficial to improving the land utilization efficiency and reducing the unit construction and operation cost, has obvious advantages of scale and intensification, and is a necessary choice for the construction of future LNG infrastructures.
And a tank wall cold insulation layer of the LNG storage tank consists of an inner side elastic felt and outer side expanded perlite. The expanded perlite is filled for the first time in the construction stage of the storage tank. In the operation process of the storage tank, the perlite expands outside and is influenced by the precooling and shrinking of the storage tank, the high-low liquid level circulation, the vibration of a pump and other factors, so that the expansion can be accelerated, and the perlite settles due to natural gravity. If the pearlite subsides behind furred ceiling aluminum plate below, the jar wall cold insulation leaks cold phenomenon will appear, causes outer jar upper portion surface to appear wet trace or moss, and this is long before will influence storage tank cold insulation performance and health status to bring the hidden danger for storage tank safe operation.
The perlite filling is generally carried out 3-8 years after the domestic conventional 16-ten thousand-square LNG storage tank is built and put into operation. For a large-volume LNG storage tank with 20 ten thousand square (and more), the diameter of the inner tank is continuously increased along with the tank volume, the radial shrinkage of the inner tank is increased under the working condition of cooling, and the risk of perlite sedimentation in the service period is higher.
Therefore, how to ensure the filling effect of perlite to improve the cold insulation performance and the operation efficiency of the storage tank becomes a hot research direction in the field.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a perlite supplementing and filling system before the large-volume LNG storage tank is put into operation so as to ensure the filling effect of perlite and improve the cold insulation performance and the operation efficiency of the storage tank.
The utility model provides a perlite supplementing and filling system before the operation of an LNG storage tank, which comprises:
the top of the storage tank is communicated with an annular space between the inner tank and the outer tank, and a plurality of perlite filling pipes are arranged on a concentric circle along a radial coordinate;
the perlite filling connection ball valve is connected with the perlite filling pipe and used for controlling the filling of perlite;
the filling port valve box system is connected with the perlite filling connection ball valve, is used for supplying power and perlite, and is arranged at the top of the storage tank;
a fill hose connected to the fill port valve box system for transporting perlite to the fill port valve box system.
According to one embodiment of the utility model, the perlite filled tubes are arranged on concentric circles along a radial coordinate with the arc length of every 2-5 m.
According to one embodiment of the utility model, a perlite filling pipe orifice is arranged in the annular space between the inner tank and the outer tank, and the lower edge of the perlite filling pipe extends into the lower part of the dome of the storage tank by 5-10 cm.
According to one embodiment of the utility model, the perlite filled tubes are arranged at a radial position at an intermediate position between the inner and outer tanks.
According to one embodiment of the claimed invention, the perlite filled junction ball valve is bolted to the upper portion of the perlite filled tube.
According to one embodiment of the utility model, the perlite filled junction ball valve has a diameter corresponding to the diameter of the perlite filled tube.
According to one embodiment of the utility model, the upper end of the perlite filling pipe is provided with a bolt connection blind plate, and when the perlite filling pipe is in operation, the blind plate is detached so as to connect the perlite filling pipe with the perlite filling connection ball valve.
According to one embodiment of the utility model, the diameter of the filling hose corresponds to the diameter of the perlite filling tube.
According to one embodiment of the utility model, the system further comprises a material tank and a conveying device, which together with the filling hose, is used for storing and feeding perlite.
According to an embodiment of the utility model, the position of the material tank and the conveying device is arranged at the bottom height of the storage tank.
The method can ensure the effect of the filling uniformity of the perlite on the wall of the storage tank along the circumferential direction, and improves the cold insulation performance and the operation efficiency of the storage tank.
Drawings
FIG. 1 is a schematic diagram of a perlite filling system according to an embodiment of the utility model;
FIG. 2 is a schematic top view of a perlite filling system including perlite filling tubes according to one embodiment of the utility model;
reference numerals: 1 pile foundation, 2 prestressed concrete outer tank, 3 inner tank, 4 jar inboard heat preservation (elastic felt), 5 jar wall outside heat preservation (expanded perlite), 6 jar bottoms heat preservation, 7 furred ceiling structure (including the furred ceiling heat preservation), 8 perlite filled tube, 9 perlite fill connect ball valve, 10 top fill mouthful valve box system, 11 fill hose, 12 bottom material jars and conveyor.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
The utility model provides a perlite supplementing and filling system which is suitable for a large-volume Liquefied Natural Gas (LNG) storage tank after cooling and before commissioning, and mainly aims at the large-volume LNG storage tank to ensure the supplementing and filling uniformity effect of perlite on the wall of the storage tank along the circumferential direction so as to improve the cold insulation performance and the operation efficiency of the storage tank.
The utility model is mainly suitable for the ultra-low temperature liquefied natural gas medium with the normal pressure storage (the gauge pressure is less than 50kPa) of the large-volume LNG storage tank with 20 ten thousand square (or more).
Wherein, the storage tank cooling is for the even precooling that carries out storage tank inner tank before the storage tank fills ultra-low temperature LNG to avoid the inner tank that the large amount of feed liquor of direct operation brought to break because of the inner tank that the low temperature shrink is uneven probably brought, the cooling of coping inner tank among the cooling process is controlled, prevents to appear great difference in temperature among the cooling process.
The storage tank and the filling system mainly comprise a storage tank main body structure (a pile foundation, a prestressed concrete outer tank, an inner tank, a suspended ceiling structure, a heat insulation system and a perlite filling pipe orifice); perlite filled tubes; perlite is filled and connected with the ball valve; a top fill port valve box system; a filling hose; bottom material jar and conveyor.
Wherein, storage tank major structure mainly includes: pile foundations 1; a prestressed concrete outer tank 2; an inner tank 3; an insulating layer (elastic felt) 4 on the inner side of the tank wall; an insulating layer (expanded perlite) 5 on the outer side of the tank wall; a tank bottom heat-insulating layer 6; a suspended ceiling structure (comprising a suspended ceiling heat-insulating layer) 7; perlite fills the orifice.
1) Pile foundation
The pile foundation 1 adopts an overhead or ground-based reinforced concrete structure to bear the weight loads of the concrete outer tank, the concrete inner tank, the LNG liquid weight and the like.
2) Prestressed concrete outer tank
The concrete outer tank 2 is composed of a reinforced concrete bearing platform, a post-tensioning type prestressed concrete tank wall and a reinforced concrete tank top, wherein the tank bottom bearing platform and the tank wall as well as the tank wall and the tank top are in rigid fixed connection or flexible connection with a shock insulation pad so as to transfer and distribute loads of the upper tank body, liquid weight and the like to the pile foundation 1.
3) Inner pot
The inner tank 3 is composed of a 9% Ni steel tank bottom, tank walls and a supplement bottom, and the thickness of inner tank wall plates is continuously increased from top to bottom so as to bear the LNG hydraulic pressure at different position heights.
4) Inner insulating layer of tank wall (elastic felt)
The tank wall annular 1 space heat preservation layer of the LNG storage tank is composed of a tank wall inner side heat preservation layer 4 (tightly attached to one side of the inner tank wall plate and can be an elastic felt) and outer side expanded perlite powder, wherein the elastic felt is used for absorbing the side pressure of the outer side perlite powder to the inner tank wall plate.
5) Tank wall outside insulating layer (expanded perlite)
The tank wall annular space heat preservation layer of the LNG storage tank is composed of an inner side (one side close to the inner tank wall plate) elastic felt and outer side expanded perlite powder, and the tank wall outer side heat preservation layer 5 can be filled with perlite raw ore in-situ expanded foam.
6) Tank bottom heat-insulating layer
Tank bottom heat preservation 6 of LNG storage tank generally is the foam glass brick material that has certain bearing strength, forms by multilayer foam glass brick staggered arrangement usually to avoid appearing the through gap, reduce cold insulation effect.
7) Suspended ceiling structure
The plate material of suspended ceiling structure 7 is aluminum alloy or stainless steel construction, can be assembled buckled plate composite construction, and the suspended ceiling board upper strata covers the heat preservation. The cooling and support structure should allow for the circulation of air from below to above the ceiling. Furred ceiling aluminum plate and edge board are seal structure, prevent solid-like cold insulation material in annular space and furred ceiling top from falling into the jar. The heat-insulating layer on the upper part of the suspended ceiling plate is made of glass wool or expanded perlite, and the installation needs to consider the influence of the reduction of the cold insulation thickness caused by the compression of the cold insulation material due to self weight after long-term use.
8) Perlite filled pipe orifice
As shown in fig. 2, the perlite filling pipe orifice is used for perlite filling construction of an annular space between an inner tank and an outer tank of a large-scale LNG storage tank, the radial position of the perlite filling pipe orifice is generally arranged at the middle position of the inner tank and the outer tank, in order to ensure perlite filling effect of the tank wall in the circumferential direction of the storage tank, a plurality of perlite filling pipe orifices are required to be arranged on a concentric circle of a radial coordinate, and one perlite filling pipe orifice is generally arranged with an arc length of 2-5 m.
The LNG storage tank filling system mainly comprises:
the top of the storage tank is communicated with an annular space between the inner tank and the outer tank, and a plurality of perlite filling pipes are arranged on a concentric circle along a radial coordinate;
the perlite filling connection ball valve is connected with the perlite filling pipe and used for controlling the filling of perlite;
the filling port valve box system is connected with the perlite filling connection ball valve, is used for supplying power and perlite, and is arranged at the top of the storage tank;
a fill hose connected to the fill port valve box system for transporting perlite to the fill port valve box system.
The perlite filled tube 8 is typically a carbon steel tube with a nominal diameter of 4-6 inches and the lower edge of the perlite filled tube typically extends 5-10cm below the dome. Preferably, one perlite filled tube is placed every 2-5m arc length.
The perlite filled connecting ball valve 9 is generally a carbon steel or stainless steel valve, and has a diameter consistent with that of the perlite filled pipe 8. The perlite filling pipe can be used as a permanent part and connected to the upper part of a perlite filling pipe opening through bolts (the upper end surface of a ball valve is connected with a blind plate through bolts), or used as a temporary filling part (the upper end surface of the perlite filling pipe opening is connected with the blind plate through bolts).
Before the additional filling, the filling port valve box system 10 is temporarily conveyed to the top of the storage tank by a crane and is used for additional filling of perlite on the upper part of the annular space of the tank top after the large-volume LNG storage tank is cooled and before the large-volume LNG storage tank is put into operation.
The filling hose 11 is typically of a metallic or non-metallic material and has a diameter corresponding to the perlite filling nozzle. As temporary components, a temporary material tank at the bottom of the storage tank, a conveying device and a top temporary filling port valve box system are connected.
When material jar and conveyor 12 are used for on-spot LNG storage tank expanded perlite to mend and fill, temporarily hold the pearlite powder after the inflation, lie in LNG storage tank bottom ground department during filling.
The filling method comprises the following steps: after the liquid level establishment and the storage tank cooling are finished in a large-volume LNG storage tank with 20 ten thousand square (and more) square (and the liquid level reaches 0.5m-2.0 m), the supplementary filling of an expanded perlite cold insulation layer on the outer side of the wall of the storage tank is immediately carried out; after the perlite is filled, the storage tank continues to feed liquid until the liquid level is high; keeping the liquid level unchanged, and completing the evaporation rate performance test of the low-pressure pump and the storage tank; and after all the test runs are finished, the LNG storage tank is put into operation formally.
Specifically, after the large-volume LNG storage tank is cooled, when the storage tank is at a lower liquid level (the liquid level height is 0.5-2.0m), expanded perlite filling construction is immediately carried out, and the storage tank construction is formally finished after the expanded perlite filling construction is finished.
The liquid level reaches 0.5m-2.0m, so that the storage tank is in a stable state after being cooled, the liquid level of the inner tank is prevented from being cleared due to continuous evaporation of low-temperature LNG within a period of time, and basic conditions are provided for carrying out the implementation, performance test and other work of the method before the subsequent storage tank is put into operation.
The general operating pressure of a large-volume LNG storage tank with 20 ten thousand square (or more) is 12-24kPa (gauge pressure), when the method is adopted for filling, the operating pressure of the LNG storage tank is controlled to be less than or equal to 12kPa (gauge pressure) by an external BOG (boil off gas) low-pressure compressor, and the perlite filling operation requires that the pressure in the storage tank is kept stable (the pressure change is less than 1.0 kPa/hour).
The operating pressure of the LNG storage tank is controlled to be less than or equal to 12kPa (gauge pressure), the pressure in the storage tank is required to be kept stable in the perlite filling operation (the pressure change is less than 1.0 kPa/hour), and the filling implementation effect is prevented from being influenced by perlite dust floating in the annular space of the storage tank caused by too large operating pressure of the storage tank.
Preferably, the perlite filling pipe orifices are filled according to 1 pipe orifice at clockwise intervals or anticlockwise intervals, and after the first round of filling is completed and height measurement is completed, filling of the spaced pipe orifices is carried out. In this way, the filling effect is prevented from being affected by the interference such as dust floating between adjacent nozzles due to the filling of the nozzles one by one.
After the large-volume LNG storage tank is cooled and before the large-volume LNG storage tank is put into operation, perlite is filled in the large-volume LNG storage tank in a supplementing mode, and the large-volume LNG storage tank is continuously filled with liquid until the liquid level is high; keeping the liquid level unchanged, and completing the evaporation rate performance test of the low-pressure pump and the storage tank; and after all the test runs are finished, the LNG storage tank is put into operation formally.
The method can ensure the effect of the filling uniformity of the perlite on the wall of the storage tank along the circumferential direction, and improves the cold insulation performance and the operation efficiency of the storage tank.
Examples
In an embodiment of the present invention, a perlite filling system suitable for use after cooling and before commissioning of a large-volume Liquefied Natural Gas (LNG) storage tank is shown in fig. 1, and the corresponding storage tank and filling system are composed of a storage tank main structure, a perlite filling pipe, a perlite filling connection ball valve, a top filling port valve box system, a filling hose, a bottom material tank, and a conveying device.
1. Storage tank main body structure
The main structure of the storage tank consists of 8 parts: pile foundations 1; a prestressed concrete outer tank 2; an inner tank 3; an insulating layer (elastic felt) 4 on the inner side of the tank wall; an insulating layer (expanded perlite) 5 on the outer side of the tank wall; a tank bottom heat-insulating layer 6; a suspended ceiling structure (comprising a suspended ceiling heat-insulating layer) 7; perlite fills the orifice.
1) Pile foundation
The pile foundation 1 adopts an overhead or ground-based reinforced concrete structure to bear the weight loads of the concrete outer tank, the concrete inner tank, the LNG liquid weight and the like.
2) Prestressed concrete outer tank
The concrete outer tank 2 is composed of a reinforced concrete bearing platform, a post-tensioning type prestressed concrete tank wall and a reinforced concrete tank top, wherein the tank bottom bearing platform and the tank wall as well as the tank wall and the tank top are in rigid fixed connection or flexible connection with a shock insulation pad so as to transfer and distribute loads of the upper tank body, liquid weight and the like to the pile foundation 1.
3) Inner pot
The inner tank 3 is composed of a 9% Ni steel tank bottom, tank walls and a supplement bottom, and the thickness of inner tank wall plates is continuously increased from top to bottom so as to bear the LNG hydraulic pressure at different position heights.
4) Inner insulating layer of tank wall (elastic felt)
The tank wall annular 1 space heat preservation layer of the LNG storage tank is composed of a tank wall inner side heat preservation layer 4 (tightly attached to one side of the inner tank wall plate and can be an elastic felt) and outer side expanded perlite powder, wherein the elastic felt is used for absorbing the side pressure of the outer side perlite powder to the inner tank wall plate.
5) Tank wall outside insulating layer (expanded perlite)
The tank wall annular space heat preservation layer of the LNG storage tank is composed of an inner side (one side close to the inner tank wall plate) elastic felt and outer side expanded perlite powder, and the tank wall outer side heat preservation layer 5 can be filled with perlite raw ore in-situ expanded foam.
6) Tank bottom heat-insulating layer
Tank bottom heat preservation 6 of LNG storage tank generally is the foam glass brick material that has certain bearing strength, forms by multilayer foam glass brick staggered arrangement usually to avoid appearing the through gap, reduce cold insulation effect.
7) Suspended ceiling structure
The plate material of suspended ceiling structure 7 is aluminum alloy or stainless steel construction, can be assembled buckled plate composite construction, and the suspended ceiling board upper strata covers the heat preservation. The cooling and support structure should allow for the circulation of air from below to above the ceiling. Furred ceiling aluminum plate and edge board are seal structure, prevent solid-like cold insulation material in annular space and furred ceiling top from falling into the jar. The heat-insulating layer on the upper part of the suspended ceiling plate is made of glass wool or expanded perlite, and the installation needs to consider the influence of the reduction of the cold insulation thickness caused by the compression of the cold insulation material due to self weight after long-term use.
8) Perlite filled pipe orifice
As shown in fig. 2, the perlite filling pipe is used for perlite filling construction of an annular space between an inner tank and an outer tank of a large-scale LNG storage tank, the radial position is preferably arranged at the middle position of the inner tank and the outer tank, in order to guarantee perlite filling effect of the tank wall in the circumferential direction of the storage tank, a plurality of perlite filling pipe openings are arranged on a radial coordinate concentric circle, and a perlite filling pipe is arranged with an arc length of 2-5 m.
The filling system comprises a perlite filling pipe, a perlite filling connection ball valve, a top filling port valve box system, a filling hose, a bottom material tank and a conveying device.
The perlite filling pipe is a carbon steel pipe, the nominal diameter of the perlite filling pipe is 4-6 inches, and the lower edge of the filling pipe extends into the lower part of a dome of the perlite filling pipe orifice by 5-10 cm.
The perlite filled junction ball valve 9 is preferably a carbon steel or stainless steel valve, with a diameter consistent with the perlite filled tube 8. The perlite filling pipe can be used as a permanent part and connected to the upper part of a perlite filling pipe opening through bolts (the upper end surface of a ball valve is connected with a blind plate through bolts), or used as a temporary filling part (the upper end surface of a perlite filling pipe is connected with a blind plate through bolts).
Before the supplement filling, the filling port valve box system 10 is temporarily conveyed to the top of the storage tank by a crane, is used for supplement filling of perlite on the upper part of the annular space of the tank top after the large-volume LNG storage tank is cooled and before the large-volume LNG storage tank is put into operation, and is connected with a perlite filling connection ball valve 9 for supplying power and perlite.
The filling hose 11 is made of metal or nonmetal material and has the same diameter as the perlite filling pipe orifice. As temporary means for connecting the temporary material tank and conveyor 12 at the bottom of the tank to the top temporary fill port valve box system 10.
When material jar and conveyor 12 were used for on-spot LNG storage tank expanded perlite to mend and fill, the pearlite powder after the temporary holding expansion was located LNG storage tank bottom ground department during the filling.
The filling operation of the above embodiment is explained as follows:
the specific procedures used in the following examples are conventional unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
After the inerting displacement of nitrogen in the large-volume LNG storage tank of 20 ten thousand square (and more) is completed, the storage tank is cooled by the low-temperature LNG. When the liquid level is established and the storage tank is cooled, the liquid level reaches 0.5m to 2.0m and the temperature reaches about minus 160 ℃, and then the additional filling of the expanded perlite cold insulation layer on the outer side of the tank wall of the storage tank is carried out.
The general operating pressure of a large-volume LNG storage tank with 20 ten thousand square (or more) is 12-24kPa (gauge pressure), when the method is adopted for filling, the operating pressure of the LNG storage tank is controlled to be less than or equal to 12kPa (gauge pressure) by an external BOG (boil off gas) low-pressure compressor, and the perlite filling operation requires that the pressure in the storage tank is kept stable (the pressure change is less than 1.0 kPa/hour).
And (3) detecting the loose density, the tap density, the granularity and the water content in a field laboratory when the expanded perlite enters a field. And connecting a filling hose to a filling port valve box system and a perlite filling connection ball valve, and taking an anti-static grounding measure.
And filling the expanded perlite powder qualified by detection into a material tank and a conveying device on the ground, and replacing air in the material conveying tank, the conveying hose and the filling port valve box system by using dry nitrogen.
Any perlite filling pipe orifice is selected at the top of the storage tank to start filling, the influence of the angle of repose under the action of natural gravity of expanded perlite is considered, 1 pipe orifice is preferably filled at the perlite filling pipe orifice at a clockwise interval or a counterclockwise interval at each time, and after the first round of filling is completed and height measurement is completed, filling of spaced pipe orifices is carried out.
And after finishing all perlite filling pipe orifices and the height measurement is qualified, feeding the LNG storage tank to a high liquid level, and after the field conditions have the performance tests of the remaining low-pressure pump, the evaporation rate and the like and finishing all the test run work, putting the LNG storage tank into operation formally.
It should be noted that, in the present document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In addition, in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The foregoing embodiments are merely illustrative of the present invention, and various components and devices of the embodiments may be changed or eliminated as desired, not all components shown in the drawings are necessarily required, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, and all equivalent changes and modifications based on the technical solutions of the present invention should not be excluded from the scope of the present invention.
Claims (10)
1. The utility model provides a system is filled to pearlite benefit before large volume LNG storage tank is put into operation which characterized in that, the system includes:
the top of the storage tank is communicated with an annular space between the inner tank and the outer tank, and a plurality of perlite filling pipes are arranged on a concentric circle along a radial coordinate;
the perlite filling connection ball valve is connected with the perlite filling pipe and used for controlling the filling of perlite;
the filling port valve box system is connected with the perlite filling connection ball valve, is used for supplying power and perlite, and is arranged at the top of the storage tank;
a fill hose connected to the fill port valve box system for transporting perlite to the fill port valve box system.
2. The pre-commissioning perlite filling system of claim 1, wherein said perlite filling tubes are arranged on concentric circles on a radial coordinate with arc lengths of every 2-5 m.
3. The system of claim 1 or 2, wherein a perlite filling pipe orifice is arranged in the annular space between the inner tank and the outer tank, and the lower edge of the perlite filling pipe extends into the lower part of the dome of the storage tank by 5-10 cm.
4. The pre-commissioning perlite filling system of claim 1 or 2, wherein the perlite filling tubes are arranged at a radial position at an intermediate position between the inner and outer tanks.
5. The pre-commissioning perlite filling system of claim 1 or 2 wherein said perlite fill connection ball valve is bolted to the upper portion of said perlite fill tube.
6. The pre-commissioning perlite filling system of claim 1 or 2 wherein the perlite filled connection ball valve has a diameter that corresponds to the diameter of the perlite filled tube.
7. A system as claimed in claim 1 or claim 2, wherein the perlite filling pipe is provided with a bolted blind plate at its upper end, which blind plate is removed during operation to allow the perlite filling pipe to be connected to the perlite filled connecting ball valve.
8. The pre-commissioning perlite filling system of claim 1 or 2, wherein the diameter of the filling hose is consistent with the diameter of the perlite filling tube.
9. The pre-commissioning perlite filling system of claim 1 or 2 further comprising a material tank and transfer means, in combination with said filling hose, for storage and supply of perlite.
10. The pre-commissioning perlite filling system of claim 9, wherein the material tank and the conveyor are located at a bottom height of the storage tank.
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| CN202123311687.5U CN216619329U (en) | 2021-12-27 | 2021-12-27 | Perlite supplementing and filling system before large-volume LNG storage tank commissioning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508689A (en) * | 2021-12-27 | 2022-05-17 | 中海石油气电集团有限责任公司 | Perlite supplementing and filling method before large-volume LNG storage tank commissioning |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508689A (en) * | 2021-12-27 | 2022-05-17 | 中海石油气电集团有限责任公司 | Perlite supplementing and filling method before large-volume LNG storage tank commissioning |
| CN114508689B (en) * | 2021-12-27 | 2024-02-02 | 中海石油气电集团有限责任公司 | Perlite filling method before operation of large-volume LNG storage tank |
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