CN208459313U - LNG ship storage tank thermal insulation layer is cold to inspect experiment device - Google Patents
LNG ship storage tank thermal insulation layer is cold to inspect experiment device Download PDFInfo
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- CN208459313U CN208459313U CN201821005081.4U CN201821005081U CN208459313U CN 208459313 U CN208459313 U CN 208459313U CN 201821005081 U CN201821005081 U CN 201821005081U CN 208459313 U CN208459313 U CN 208459313U
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Abstract
The utility model relates to LNG storage tank technical fields, and in particular to a kind of LNG ship storage tank thermal insulation layer is cold to inspect experiment device.LNG ship storage tank thermal insulation layer is cold inspects experiment device for this, comprising: cryogenic media container, for storing cryogenic media, boiling point≤- 163 DEG C of cryogenic media；The first branch, input end and cryogenic media reservoir, outlet end with LNG storage tank for being connected to；Gasifier and the first regulating valve are provided in the first branch；Gasifier is for gasifying liquid phase cryogenic media for gas phase cryogenic media；First regulating valve is connected to the output end of gasifier, for controlling the transmission of the gas phase cryogenic media circulated in the first branch；Second branch, input end and cryogenic media reservoir, outlet end with LNG storage tank for being connected to, to transmit liquid phase cryogenic media to LNG storage tank；The second regulating valve is provided in second branch, for controlling the transmission of the liquid phase cryogenic media circulated in second branch.It is effectively detected conducive to insulating layer of the technical staff to LNG storage tank.
Description
Technical field
The utility model relates to LNG storage tank technical fields, and in particular to a kind of LNG ship cold seizure test dress of storage tank thermal insulation layer
It sets.
Background technique
The main component of liquefied natural gas (Liquefied Natural Gas, LNG) is methane.Pass through cryogenic refrigeration skill
Art drops natural gas under normal pressure and is cooled to < -164 DEG C, makes its liquefaction.Since the critical-temperature of LNG is far below environment temperature, institute
Transport and storage under conditions of full freezing can only be used, i.e., transported at a temperature of atmospheric boiling point (- 164 DEG C).LNG storage tank is low
Warm holding vessel, for storing liquefied natural gas.
The insulating layer of LNG storage tank in the prior art is usually storage tank manufactory is constructed, room temperature is examined and provides 5
The guarantee in year；And the construction period of storage tank manufactory manufacture LNG storage tank is longer, up to one month sometimes, and be easy by such as
The influence of the environmental factors such as cooling, precipitation, and construction team to the quality control of LNG storage tank be mostly from thickness and appearance into
Row checks, and is difficult to carry out cold seizure test to the insulating layer of LNG storage tank.
Storage tank manufactory is when LNG storage tank loads progress LNG loading test onto ship, then fills liquid natural to LNG storage tank on one side
Gas carries out the cold seizure test of Cold-keeping Layer on one side.At this point, the insulating layer of LNG storage tank once goes wrong, the insulating layer of LNG storage tank
Reparation difficulty ratio many is increased in storage tank manufactory, and the repair time for leaving storage tank manufactory for is very short, it is likely that meeting
The normal delivery for influencing ship, causes economic loss.
Utility model content
To overcome drawbacks described above, the purpose of this utility model is to provide that a kind of LNG ship storage tank thermal insulation layer is cold to be inspected
Experiment device.
The purpose of this utility model is achieved through the following technical solutions:
The utility model provides that a kind of LNG ship storage tank thermal insulation layer is cold to inspect experiment device, comprising:
Cryogenic media container, for storing cryogenic media, boiling point≤- 163 DEG C of cryogenic media；
The first branch, input end are connected with the cryogenic media container, and outlet end with LNG storage tank for being connected
It is logical；Gasifier and the first regulating valve are provided in the first branch；The gasifier is used for
Gas phase cryogenic media；First regulating valve is connected with the output end of the gasifier, circulates in described first for controlling
The transmission of gas phase cryogenic media in branch；
Second branch, input end are connected with the cryogenic media container, and outlet end with LNG storage tank for being connected
It is logical, to transmit liquid phase cryogenic media to LNG storage tank；It is provided with the second regulating valve in the second branch, is circulated in for controlling
The transmission of liquid phase cryogenic media in the second branch.
Preferably, the liquid phase cryogenic media is liquid nitrogen.
Preferably, pressure charging system is provided on the cryogenic media container.
Preferably, cold inspection temperature measuring instrument, the cold inspection temperature measuring instrument and institute are provided in the first branch
The input terminal for stating gasifier is connected；Cold inspection pressure measuring instruments is additionally provided in the first branch, the cold inspection pressure is surveyed
Amount instrument is connected with the output end of the gasifier；The first branch also on be provided with cold inspection safety valve, the cold inspection peace
Full valve is connected with the output end of the gasifier.
Preferably, a cold inspection exhaust pipe being connected with the output end of the gasifier is provided in the first branch,
Cold inspection exhaust-valve is provided on the cold inspection exhaust pipe.
Preferably, the cryogenic media container is tank car.
Preferably, the gasifier is air-heating type gasifier.
As shown from the above technical solution, the advantages of the utility model and have the active effect that the utility model LNG ship use
Cryogenic media in the cold cryogenic media container for inspecting experiment device of storage tank thermal insulation layer is sent into gasifier by the first branch, by gas
Change device and cryogenic media is gasificated into cryogenic gas, then cryogenic gas is sent into LNG storage tank by the first branch, is originally present in
Most of air in LNG storage tank is replaced by cryogenic gas to external environment；Cryogenic media in cryogenic media container passes through the
Two branches input in LNG storage tank, gasify heat absorption using cryogenic media the temperature in LNG storage tank is reduced to suitable setting temperature
Degree；Since the boiling point of cryogenic media is lower than the boiling point of LNG, set temperature is enabled to be lower than the boiling point of LNG；At this time if LNG is stored up
There is fog flow or has condensate in the insulating layer of tank, then represents insulating layer cold draining, conversely, then representing the insulating layer of LNG storage tank
Well；The insulating layer of LNG storage tank is effectively detected in time convenient for technical staff.
Detailed description of the invention
The utility model is described in detail by following preferred embodiments and attached drawing for ease of explanation,.
Fig. 1 is the cold structural schematic diagram for inspecting experiment device of the utility model LNG ship storage tank thermal insulation layer；
Fig. 2 is the flow chart of the cold seizure test method of the utility model LNG ship storage tank thermal insulation layer.
Label declaration: 1, cryogenic media container；11, outlet valve；2, the first branch；22, the first regulating valve；3, gasifier；
5, LNG storage tank；51, storage tank exhaust-valve；52, tank body；53, storage tank exhaust pipe；54, pressure of storage tank measuring instrumentss；55, tank temperature
Measuring instrumentss；56, tank safety valve；6, second branch；61, the second regulating valve；71, cold inspection temperature measuring instrument；81, cold inspection pressure
Force measuring instrument；92, cold inspection exhaust pipe；93, cold inspection exhaust-valve；94, cold inspection safety valve.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only used to explain this reality
With novel, it is not used to limit the utility model.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise " be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " first ",
" second " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicates indicated technology
The quantity of feature.Define " first " as a result, the feature of " second " can explicitly or implicitly include it is one or more
The feature.The meaning of " plurality " is two or more in the description of the present invention, unless otherwise clearly specific
It limits.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection.It can be mechanical connection, be also possible to be electrically connected.Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements or the interaction relationship of two elements.For those of ordinary skill in the art and
Speech, can understand the concrete meaning of above-mentioned term in the present invention as the case may be.
The utility model provides that a kind of LNG ship storage tank thermal insulation layer is cold to inspect experiment device, for LNG storage tank 5 to be reduced to
Set temperature carries out detection test with the thermal insulation property of the insulating layer to LNG storage tank 5.Wherein, referring to Fig. 1, LNG storage tank 5 is wrapped
Include tank body 52, the storage tank exhaust pipe 53 that is set on tank body 52, the storage tank exhaust-valve 51 being set on storage tank exhaust pipe 53, setting
In on tank body 52 pressure of storage tank measuring instrumentss 54, the tank temperature measuring instrumentss 55 that are set on tank body 52 and be set to tank body
Tank safety valve 56 on 52.
In the present embodiment, the cold experiment device of inspecting of LNG ship storage tank thermal insulation layer includes being stored with cryogenic media (not shown)
Cryogenic media container 1, the first branch 2 being in parallel and second branch 6, the first branch 2 are connected to the input end of second branch 6
Cryogenic media container 1, the first branch 2 and the outlet end of second branch 6 are connected to LNG storage tank 5 to be tested.Cryogenic media container
1 conveys gas phase cryogenic media to LNG storage tank 5 by the first branch 2, and cryogenic media container 1 passes through second branch 6 to LNG storage tank 5
Convey liquid phase cryogenic media.
Pressure charging system (not shown) is provided on cryogenic media container 1, to adjust the pressure in cryogenic media container 1.It is low
Outlet valve 11 is provided on warm media Containers 1.Further, cryogenic media container 1 is preferably tank car；The boiling point of cryogenic media is not
Higher than -163 DEG C, cryogenic media is preferably liquid nitrogen, and the boiling point of liquid nitrogen is -196.25 DEG C, be it is inert, it is colourless, it is odorless, it is corrosion-free
Property, non-combustible, temperature is extremely low, has good safety and economy.More preferably, which is from pressure charging system, packet
Pressurization gasifier (not shown) is included, cryogenic media container 1 first is discharged in the liquid nitrogen of part in pressurization, through being pressurized gasifier gasification
Afterwards, it returns again to the gas-phase space of cryogenic media container 1, to achieve the purpose that cryogenic media container 1 from pressurization.
The input end of the first branch 2 is connected with cryogenic media container 1, and outlet end is used for and 5 phase of LNG storage tank to be tested
It is connected to, is provided with gasifier 3 and the first regulating valve 22 in the first branch 2, wherein gasifier 3 uses air-heating type gasifier, tool
Have the advantages that strong excellent heat transfer effect, corrosion resistance, long service life, Operation and maintenance are convenient.First regulating valve 22 and gas
The input terminal for changing device is connected, for controlling the transmission of the liquid nitrogen circulated in the first branch 2.
Cold inspection temperature measuring instrument 71, cold inspection pressure measuring instruments 81, cold inspection exhaust pipe are also equipped in the first branch 2
92, cold inspection exhaust-valve 93 and cold inspection safety valve 94.
Specifically, cold inspection temperature measuring instrument 71 is between outlet valve 11 and gasifier 3, cold inspection pressure measuring instruments 81
Between the first regulating valve 22 and gasifier 3, cold inspection safety valve 94 is between the first regulating valve 22 and gasifier 3；Cold inspection
Temperature measuring instrument 71 and it is cold inspection pressure measuring instruments 81 be conducive to technical staff understand in time gasifier 3 input terminal temperature and
The pressure condition of output end matches, it is ensured that LNG ship storage tank thermal insulation layer is cold to inspect experiment device with the first cold inspection safety valve 94
Safety.
For cold inspection exhaust pipe 92 between the first regulating valve 22 and gasifier 3, cold inspection exhaust-valve 93 is installed on cold inspection exhaust
On pipe 92.Cold inspection row when being replaced using low temperature nitrogen to the air in LNG storage tank 5, on openable cold inspection exhaust pipe 92
Quickly the air in the first branch 2 is discharged conducive to nitrogen for empty valve 93.
The input end of second branch 6 is connected with cryogenic media container 1 and outlet end is for being connected to LNG storage tank to be tested
5；Second regulating valve 61 is installed, for controlling the transmission of the liquid nitrogen circulated in second branch 6 in second branch 6.
In the present embodiment, the input end of the first branch 2 and second branch 6 passes through outlet valve 11 and cryogenic media container 1
Connection.Certainly, the input end of the first branch 2 and second branch 6 can also be directly connected to cryogenic media container 1.2 He of the first branch
Cryogenic hose transmission cryogenic media can be used in second branch 6.
It is illustrated below for the LNG ship of the utility model with the cold seizure test method of storage tank thermal insulation layer.Wherein, this method
It can inspect experiment device based on above-mentioned LNG ship with storage tank thermal insulation layer is cold and carry out.
Referring to figure 2., the utility model also provides a kind of cold seizure test method of LNG ship storage tank thermal insulation layer, wherein the party
Method can inspect experiment device and carry out based on above-mentioned LNG ship with storage tank thermal insulation layer is cold.For ease of understanding, referring to Fig. 1,
It is described in detail below in conjunction with LNG ship with the cold specific structure for inspecting experiment device of storage tank thermal insulation layer, also using liquid nitrogen as low temperature
For medium.
A kind of LNG ship cold seizure test method of storage tank thermal insulation layer, comprising steps of
S1, cryogenic media is exported from cryogenic media container, is inputted in LNG storage tank after cryogenic media is gasified, LNG is stored up
Air in tank is replaced；Wherein, the boiling point of the cryogenic media is not higher than -163 DEG C；
Specifically, the second regulating valve 61 is closed, the storage tank row in outlet valve 11, the first regulating valve 22 and LNG storage tank 5 is opened
Empty valve 51 adjusts the pressure of cryogenic media container 1 by pressure charging system, so that the liquid nitrogen in cryogenic media container 1 passes through first
Branch 2 be sent into gasifier 3 in, by gasifier 3 by liquid nitrogen gasification be nitrogen, then by second branch 6 by nitrogen be sent into LNG storage tank 5
In, to complete displacement of the nitrogen in LNG storage tank 5 to air, the air being originally present in LNG storage tank 5 is vented by storage tank
Storage tank exhaust-valve 51 on pipe 53 is discharged to the outside environment.When dew point≤- 40 DEG C for the nitrogen being discharged by storage tank exhaust pipe 53, close
Outlet valve 11 and the first regulating valve 22 are closed, displacement of the nitrogen to air is stopped.For dew point when -40 DEG C, nitrogen will be big
Partial air displacement is gone out, and is reduced the moisture more than 90% compared to room temperature, is prevented steam from damaging to storage tank.
S2, liquid phase cryogenic media is inputted in LNG storage tank from cryogenic media container, reduces the temperature in LNG storage tank
To set temperature, the condensate state of the insulating layer of LNG storage tank is checked；Minimum set temperature is not higher than -163 DEG C.
Specifically, the pressure that cryogenic media container 1 is improved by pressure charging system, when cryogenic media container 1 and LNG storage tank 5
Between pressure difference when being greater than the pressure in 3barg and LNG storage tank 5 and being no more than 9barg, open outlet valve 11 and the second regulating valve
61, cryogenic media container 1 conveys liquid nitrogen to LNG storage tank 5 by second branch 6, wherein can be by controlling outlet valve 11 and second
The aperture of regulating valve 61 prevents liquid nitrogen from concentrating and enters tank so that the cooling rate of storage tank is not more than 10 DEG C/h, preferably 10 DEG C/h
Body 52 causes tank body 52 to damage so that the decline of 52 temperature of tank body is uneven.Pressure of storage tank measuring instrumentss 54 are conducive to technical staff
Solve the pressure condition in tank body 52；Tank temperature measuring instrumentss 55 are conducive to the temperature conditions in technical staff's understanding tank body 52, from
And control the aperture of outlet valve 11 and the second regulating valve 61.
After the temperature of LNG storage tank 5 reaches -40 DEG C, stablize 10 minutes, closes outlet valve 11 or the second regulating valve 61, just
Step checks the state of the insulating layer of LNG storage tank 5.
If not finding that the insulating layer of LNG storage tank 5 fog flow occurs or has condensate, reopen outlet valve 11 or
Second regulating valve 61 continues to input liquid nitrogen to LNG storage tank 5, and cooling rate is preferably 10 DEG C/h, and temperature reaches -120 DEG C in tank
Afterwards, stablize 10 minutes, close outlet valve 11 or the second regulating valve 61, check again for the state of insulating layer.
If not finding that the insulating layer of LNG storage tank 5 fog flow occurs or has condensate, opening reopens outlet valve
11 or second regulating valve 61, continuing to spray into liquid nitrogen to LNG storage tank 5 makes LNG storage tank 5 cool down, and cooling rate is preferably 10 DEG C/h, directly
Temperature to LNG storage tank 5 is -163 DEG C, and is stablized 10 minutes, and outlet valve 11 or the second regulating valve 61 are closed, and checks LNG storage tank 5
Insulating layer state, see whether insulating layer outer surface has fog flow or have condensate.
In above-mentioned detecting step, if insulating layer has fog flow or has condensate to prove insulating layer cold draining, carry out
Label and record, are repaired, and repeat cold seizure test again after LNG storage tank 5 is warming up to room temperature.Conversely, then the representative is set
The insulating layer of LNG storage tank 5 when temperature is good.
The storage tank exhaust-valve 51 in LNG storage tank 5 is closed after cold inspection, the first branch 2 is separated with LNG storage tank 5, and
External protection blind plate and pressure gauge are installed to LNG storage tank 5 according to shipping status.With LNG storage tank 5 after the nitrogen heat absorption in tank
Pressure will be slow rising, in due course open LNG storage tank 5 on storage tank exhaust-valve 51 nitrogen is discharged, maintain room temperature under LNG storage tank
Gas pressure in 5 is in 0.5barg or so, the internal protection gas that nitrogen is shipped as LNG storage tank 5.
The utility model at least has the following advantages:
1, the cold experiment device of inspecting of the LNG ship storage tank thermal insulation layer of the utility model is beaten by first closing the second regulating valve 61
Outlet valve 11 and storage tank exhaust-valve 51 are opened, so that the liquid nitrogen in cryogenic media container 1 is sent into gasifier 3 by the first branch 2,
By gasifier 3 by liquid nitrogen gasification at nitrogen, then by the first branch 2 by nitrogen be sent into LNG storage tank 5 in, with complete nitrogen to LNG store up
The displacement of air in tank 5, the air being originally present in LNG storage tank 5 pass through 51 row of storage tank exhaust pipe 53 and storage tank exhaust-valve
External environment is arrived out；After the completion of most of air in LNG storage tank 5 is replaced by nitrogen, the first regulating valve 22 is closed, opens the
Two regulating valves 61 control the aperture of outlet valve 11 and the second regulating valve 61, to control the cooling rate of LNG storage tank 5 in 10 DEG C/h
Interior, the liquid nitrogen in cryogenic media container 1 is inputted in LNG storage tank 5 by second branch 6, and the temperature in LNG storage tank 5 is reduced
To set temperature；Since the boiling point of liquid nitrogen is lower than the boiling point of LNG, set temperature is enabled to be lower than the boiling point of LNG；At this time if
There is fog flow or has condensate in the insulating layer of LNG storage tank 5, then represents insulating layer cold draining, conversely, then representing LNG storage tank 5
Insulating layer is good；It is effectively detected conducive to insulating layer of the technical staff to LNG storage tank 5；It can be to independent c-type LNG storage tank
Carry out cold seizure test.
2, guarantee to be tested the safety of storage tank and equipment by the displacement of nitrogen and controllable cooling rate, it can also be same
When complete filling for the drying of storage tank, inerting and shipping protection gas, corresponding expense and time can be saved.
3, cold inspection temperature measuring instrument 71, cold inspection pressure measuring instruments 81 and cold inspection safety valve 94 ensure that LNG ship is stored up
The cold safety for inspecting experiment device of tank insulating layer.When being replaced using nitrogen to the air in LNG storage tank 5, openable cold inspection
Quickly the air in the first branch 2 is discharged conducive to gaseous nitrogen for cold inspection exhaust-valve 93 on exhaust pipe 92.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means embodiment or example is combined to describe specific
Feature, structure, material or feature are contained at least one embodiment or example of the utility model.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of LNG ship storage tank thermal insulation layer is cold to inspect experiment device characterized by comprising
Cryogenic media container, for storing cryogenic media, boiling point≤- 163 DEG C of cryogenic media；
The first branch, input end are connected with the cryogenic media container, and outlet end with LNG storage tank for being connected；Institute
It states and is provided with gasifier and the first regulating valve in the first branch；The gasifier be used for by liquid phase cryogenic media gasify for gas phase it is low
Warm medium；First regulating valve is connected with the output end of the gasifier, circulates in the first branch for controlling
Gas phase cryogenic media transmission；
Second branch, input end are connected with the cryogenic media container, and outlet end is used to be connected with LNG storage tank, with
Liquid phase cryogenic media is transmitted to LNG storage tank；It is provided with the second regulating valve in the second branch, circulates in described for controlling
The transmission of liquid phase cryogenic media in two branches.
2. LNG ship storage tank thermal insulation layer according to claim 1 is cold to inspect experiment device, which is characterized in that the liquid phase is low
Warm medium is liquid nitrogen.
3. LNG ship storage tank thermal insulation layer according to claim 1 is cold to inspect experiment device, which is characterized in that the low temperature is situated between
Pressure charging system is provided on matter container.
4. LNG ship storage tank thermal insulation layer according to claim 1 is cold to inspect experiment device, which is characterized in that described first
Road is provided with cold inspection temperature measuring instrument, and the cold inspection temperature measuring instrument is connected with the input terminal of the gasifier；Institute
It states and is additionally provided with cold inspection pressure measuring instruments in the first branch, the output end of cold the inspection pressure measuring instruments and the gasifier
It is connected；Cold inspection safety valve, the output end phase of cold the inspection safety valve and the gasifier are additionally provided in the first branch
Connection.
5. LNG ship storage tank thermal insulation layer according to claim 1 is cold to inspect experiment device, which is characterized in that described first
Road is provided with a cold inspection exhaust pipe being connected with the output end of the gasifier, is provided with cold inspection on the cold inspection exhaust pipe
Exhaust-valve.
6. LNG ship storage tank thermal insulation layer according to claim 1 is cold to inspect experiment device, which is characterized in that the low temperature is situated between
Matter container is tank car.
7. LNG ship storage tank thermal insulation layer according to claim 1 is cold to inspect experiment device, which is characterized in that the gasifier
For air-heating type gasifier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821005081.4U CN208459313U (en) | 2018-06-27 | 2018-06-27 | LNG ship storage tank thermal insulation layer is cold to inspect experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821005081.4U CN208459313U (en) | 2018-06-27 | 2018-06-27 | LNG ship storage tank thermal insulation layer is cold to inspect experiment device |
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| CN208459313U true CN208459313U (en) | 2019-02-01 |
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| CN201821005081.4U Active CN208459313U (en) | 2018-06-27 | 2018-06-27 | LNG ship storage tank thermal insulation layer is cold to inspect experiment device |
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| Country | Link |
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2018
- 2018-06-27 CN CN201821005081.4U patent/CN208459313U/en active Active
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