CN210831402U - Online compensation device of cold insulation system of LNG storage tank - Google Patents
Online compensation device of cold insulation system of LNG storage tank Download PDFInfo
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- CN210831402U CN210831402U CN201921473525.1U CN201921473525U CN210831402U CN 210831402 U CN210831402 U CN 210831402U CN 201921473525 U CN201921473525 U CN 201921473525U CN 210831402 U CN210831402 U CN 210831402U
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- storage tank
- lng storage
- perlite
- tank
- cold insulation
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Abstract
The utility model discloses an LNG storage tank cold insulation system online compensation arrangement includes: the LNG storage tank comprises a perlite material storage tank arranged on the LNG storage tank and a conveying pipe communicated with a discharge port of the perlite material storage tank and a perlite filling port of the LNG storage tank, wherein a control valve for ensuring the perlite material storage tank and the LNG storage tank to be isolated when the LNG storage tank is in a normal working condition is arranged on the conveying pipe; the LNG storage tank wall is provided with a perlite settlement monitoring device capable of controlling the control valve to be closed and opened, the perlite stock tank is a closed container, and the perlite stock tank is provided with a nitrogen replacement drying device. The utility model discloses can guarantee under the normal operating mode that pearlite in the LNG storage tank has when subsiding, the pearlite in the pearlite feed preparation jar can supply in real time.
Description
Technical Field
The utility model belongs to Liquefied Natural Gas (LNG) warehousing and transportation field, specifically speaking relates to an online compensation arrangement of LNG storage tank cold insulation system.
Background
LNG storage tank mainly comprises inner tank and outer tank, need fill thermal-insulating materials such as expanded perlite in order to guarantee the cold insulation effect of LNG storage tank between inner tank and the outer tank, the realistic conditions is LNG storage tank operation a period of time after, because storage tank internal pressure fluctuates, the inside expanded perlite who fills of LNG storage tank can produce uneven settlement in tank internal vibration etc. leads to, storage tank wall top space cold insulation effect can descend, the dewfall often can appear, phenomenons such as frost or freeze, this can cause LNG steam loss in the storage tank in a large number, can bring serious hidden danger for the safe operation of LNG storage tank even.
SUMMERY OF THE UTILITY MODEL
Because the internal pressure fluctuation of storage tank, the inside expanded perlite differential settlement of LNG storage tank that leads to such as tank internal equipment vibration in order to solve current LNG storage tank, storage tank headspace cold insulation effect descends and leads to the dewfall that LNG storage tank top appears, technical problem such as frosting or freezing, the utility model provides an LNG storage tank cold insulation system online compensation arrangement.
The utility model provides an online compensation arrangement of LNG storage tank cold insulation system includes: the LNG storage tank comprises a perlite material storage tank arranged on the LNG storage tank and a conveying pipe communicated with a discharge port of the perlite material storage tank and a perlite filling port of the LNG storage tank, wherein a control valve for ensuring the perlite material storage tank and the LNG storage tank to be isolated when the LNG storage tank is in a normal working condition is arranged on the conveying pipe; the LNG storage tank wall is provided with a perlite settlement monitoring device capable of controlling the control valve to be closed and opened, the perlite stock tank is a closed container, and the perlite stock tank is provided with a nitrogen replacement drying device.
When the LNG storage tank is in normal operating mode, pearlite settlement monitoring devices real-time supervision pearlite settlement volume, it reaches more than 200mm to settle the volume, pearlite settlement monitoring devices sends the alarm signal that needs supply pearlite, the automatic opening of the control valve on the alarm signal control conveyer pipe, the pearlite in the pearlite stock tank is filled the LNG storage tank, after alarm signal eliminates, control valve self-closing, thereby can realize the real-time replenishment to pearlite in the LNG storage tank, guarantee the normal operating of LNG storage tank.
When the perlite material preparation tank needs to be supplemented with materials, the influence of external environmental factors (mainly oxygen and water vapor) on the LNG storage tank can be thoroughly removed through the nitrogen replacement drying device arranged on the perlite material preparation tank.
The LNG storage tank comprises a prestressed concrete full-capacity tank, a bimetal single-capacity tank and the like.
Adopt the utility model discloses, following beneficial effect has:
1) be equipped with the pearlite on the LNG storage tank jar wall and subside monitoring devices, can real-time supervision pearlite settlement volume to can feed back the alarm signal that needs supply the pearlite.
2) The perlite material preparing tank is a closed container, the inner space of the perlite material preparing tank is completely isolated from the outside, and the adverse effect of external environmental factors (mainly oxygen and water vapor) on the LNG storage tank during perlite supplement can be completely avoided.
3) The control valve of installation on the conveyer pipe can open automatically, for example when the pearlite settlement monitoring devices sends the warning signal that needs supply the pearlite.
4) The control valve installed on the delivery pipe can be manually closed, for example, when the perlite preparation tank needs to be supplemented with perlite.
5) The nitrogen replacement drying device is arranged on the perlite preparation tank, so that the perlite supplemented in the perlite preparation tank can be prevented from being adversely affected by external environmental factors (mainly oxygen and water vapor).
Drawings
FIG. 1 is a schematic diagram of the novel structure of the experiment.
In the figure: the system comprises a perlite preparation tank 1, a feed supplementing port 2, a nitrogen replacement drying device 3, a perlite preparation tank discharge port 4, a conveying pipe 5, a control valve 6, a perlite filling port 7, an LNG storage tank 8, a perlite settlement monitoring device 9 and perlite 10.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the on-line compensation device of the LNG storage tank cold insulation system of the present invention mainly includes a perlite stock tank 1 installed on an LNG storage tank 8, and a conveying pipe 5 communicating a discharge port 4 of the perlite stock tank with a perlite filling port 7 of the LNG storage tank, wherein a control valve 6 for ensuring that the perlite stock tank 1 is isolated from the LNG storage tank 8 when the LNG storage tank 8 is in a normal working condition is installed on the conveying pipe 5; the 8 jar walls of LNG storage tank are equipped with the pearlite settlement monitoring devices 9 that can control valve 6 to close and open, and pearlite preparation tank 1 is airtight container, is equipped with nitrogen gas replacement drying device 3 on the pearlite preparation tank 1.
The perlite stock tank 1 may be a metal container or a glass fiber reinforced plastic container. The feed supplement port 2 arranged on the perlite preparation tank 1 is used for supplementing perlite 10 into the perlite preparation tank 1.
The conveyer pipe 5 can be the metal pipeline, also can be glass steel pipeline, and LNG storage tank 8 normal operating, control valve 6 on the conveyer pipe 5 is closed state, and pearlite preparation jar 1 and LNG storage tank 8 are isolated.
The pearlite settlement monitoring devices 9 that set up on 8 jar walls of LNG storage tank can real-time supervision pearlite settlement volume, and settlement volume reaches more than 200mm, and pearlite settlement monitoring devices 9 sends the alarm signal that needs supply pearlite 10, and control valve 6 on the alarm signal control conveyer pipe 5 is automatic to be opened, and the pearlite 10 in the pearlite material preparing tank 1 is filled LNG storage tank 8 in, and after alarm signal eliminated, control valve 6 self-closing.
1 jar of pearlite ready-to-use material jar sets up feed supplement mouth 2, can the repacking pearlite 10, and 1 feed supplement of pearlite ready-to-use material jar is ended and airtight back, gets rid of the adverse effect of external environment factor (mainly oxygen and steam) when opening the jar through nitrogen gas replacement drying device 3 on the pearlite ready-to-use material jar 1. 1 evenly arranged of pearlite material preparing jar is installed on 8 upper portions of LNG storage tank, and the volume of pearlite material preparing jar 1 can be 1 ~ 100 cubic meters, according to 8 sizes of LNG storage tank, can set up one, two or more.
Claims (5)
1. The utility model provides an online compensation arrangement of LNG storage tank cold insulation system which characterized in that: the LNG storage tank comprises a perlite material storage tank arranged on an LNG storage tank and a conveying pipe communicated with a discharge port of the perlite material storage tank and a perlite filling port of the LNG storage tank, wherein a control valve for ensuring the perlite material storage tank and the LNG storage tank to be isolated when the LNG storage tank is in a normal working condition is arranged on the conveying pipe; the LNG storage tank wall is provided with a perlite settlement monitoring device capable of controlling the control valve to be closed and opened, the perlite stock tank is a closed container, and the perlite stock tank is provided with a nitrogen replacement drying device.
2. The LNG storage tank cold insulation system online compensation device of claim 1, wherein: the perlite material preparing tank is a metal container or a glass fiber reinforced plastic container.
3. The LNG storage tank cold insulation system online compensation device of claim 1, wherein: the conveying pipe is a metal pipeline or a glass fiber reinforced plastic pipeline.
4. The LNG storage tank cold insulation system online compensation device of claim 1, wherein: the perlite material-preparing tank is evenly arranged and installed on the upper portion of the LNG storage tank, and two or more perlite material-preparing tanks are arranged.
5. The LNG storage tank cold insulation system online compensation device of claim 1, wherein: the LNG storage tank is a prestressed concrete full-capacity tank, a bimetal full-capacity tank or a bimetal single-capacity tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921473525.1U CN210831402U (en) | 2019-09-06 | 2019-09-06 | Online compensation device of cold insulation system of LNG storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921473525.1U CN210831402U (en) | 2019-09-06 | 2019-09-06 | Online compensation device of cold insulation system of LNG storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210831402U true CN210831402U (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921473525.1U Active CN210831402U (en) | 2019-09-06 | 2019-09-06 | Online compensation device of cold insulation system of LNG storage tank |
Country Status (1)
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| CN (1) | CN210831402U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970066A (en) * | 2020-07-21 | 2022-01-25 | 上海液化天然气有限责任公司 | A device that is used for inside heat preservation of LNG storage tank to subside on-line measuring |
| 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 |
-
2019
- 2019-09-06 CN CN201921473525.1U patent/CN210831402U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970066A (en) * | 2020-07-21 | 2022-01-25 | 上海液化天然气有限责任公司 | A device that is used for inside heat preservation of LNG storage tank to subside on-line measuring |
| 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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