CN203240268U - Self-support type LNG (Liquefied Natural Gas) storage tank - Google Patents
Self-support type LNG (Liquefied Natural Gas) storage tank Download PDFInfo
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- CN203240268U CN203240268U CN 201320124687 CN201320124687U CN203240268U CN 203240268 U CN203240268 U CN 203240268U CN 201320124687 CN201320124687 CN 201320124687 CN 201320124687 U CN201320124687 U CN 201320124687U CN 203240268 U CN203240268 U CN 203240268U
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Abstract
The utility model discloses a self-support type LNG (Liquefied Natural Gas) storage tank, which comprises a main storage tank body, wherein the main storage tank body is arranged on a pile foundation. The main storage tank body comprises an outer concrete tank and an inner tank with a composite structure, and the inner tank is sheathed in the outer concrete tank. The outer concrete tank comprises a concrete bearing platform, a concrete tank wall and a concrete tank top, and the concrete bearing platform is arranged on the pile foundation. The tank top of the outer concrete tank is communicated with a LNG feed pipeline and a LNG transportation-out system, and the concrete tank top is also communicated with a pressure protection system. Inner tank wallboards achieve the purpose of bearing hydraulic pressure at different positions and heights from top to bottom through a thickening fin and reinforcing ring structure, so the wallboards are thin, the utilization rate of materials is high due to the composite structure, and the cost of investment of the LNG storage tank is reduced to a great degree. The inner tank wallboards are thin, most of precast installation work can be completed in advance in workshops or construction sites through the composite structure of the inner tank wallboards, thickening fins and reinforcing rings, and the amount of high-altitude welding installation is reduced. Compared with a traditional LNG storage tank, the self-support type LNG storage tank has the advantage that the construction period is shortened.
Description
Technical field
The utility model relates to a kind of LNG storage tank, is specifically related to a kind of self-support type LNG storage tank.
Background technique
LNG Liquefied natural gas (LNG) is that rock gas changes liquid state into by gaseous state when being cooled to-162 ℃ of low temperature by rock gas under normal pressure, and volume is about with 1/600 of amount rock gas volume, and density is about 450kg/m
3LNG is colourless, and is tasteless, nontoxic and non-corrosiveness.
LNG is usually by professional cargo ship, and by the mode of sea-freight, factory is transported to LNG receiving station by liquefaction, is stored in the LNG storage tank, after gasifying, is delivered to the user by pipeline again.In LNG Industry Chain, the storage of LNG is a very important link.
No matter be natural gas liquefaction plant, or the LNG receiving terminal, the investment of LNG storage tank all occupies higher proportion, especially in the LNG receiving terminal, the investment of storage tank accounts for 30～40% of its gross investment, and visible LNG storage tank is an extremely important constituent element in the whole LNG industrial chain.
Among European norm EN14620, the GB GB/T26978, the common tank type of Large LNG storage tank has and single holds tank, double volume tank, entirely holds tank, several tank types of film tank.There are some researches show, along with the increase of tank volume, above-mentioned tank type unit volume storage tank construction cost is all on a declining curve, and scale effect is more obvious.The increase that storage tank maximization economic advantages are mainly reflected in the tank appearance can improve land use capability and reduce more storage tank BOG relative evaporation.The increase of holding along with LNG industrial chain cargo ship ship in addition, the increase of quantity and LNG increase the increase of receiving station's quantity newly, also need the LNG storage tank of supporting with it more volume.In general, maximization (160,000 sides, the above storage tank of 200,000 sides) is present Large LNG Tank Capacity development trend place.But standard has been brought bottleneck to the large scale development that the construction technologies such as the restriction of primary tank wallboard thickness, large volume welding limit to above-mentioned existing tank type.
The model utility content
The purpose of this utility model provides a kind of self-support type LNG storage tank, and this storage tank is a kind of field-installed vertical cylinder plain base LNG(LNG Liquefied natural gas) storage tank, can be used for the LNG that normal pressure stores (manometer pressure is less than 50kPa) low temperature-165 ℃.
A kind of self-support type LNG storage tank provided by the utility model, it comprises the storage tank main body, described storage tank main body is located on the pile foundation; Described storage tank main body comprises the concrete outer tank and is sheathed on the interior composite steel structure inner canister of described concrete outer tank;
Described concrete outer tank comprises concrete bearing platform, concrete tank skin and concrete tank deck, and described concrete bearing platform is located on the described pile foundation;
The tank deck of described concrete outer tank is connected with the LNG feeding pipe;
The tank deck of described concrete outer tank is connected with the outer communication system of LNG;
The tank deck of described concrete outer tank also is connected with pressure protective system.
Be to rigidly fix between the above-mentioned self-support type LNG storage tank, described concrete bearing platform and described concrete tank skin, described concrete tank skin and described concrete tank deck and be connected;
Described concrete bearing platform is fixedly connected on the described pile foundation, and described concrete bearing platform is used for transmitting with distributing described concrete tank skin, described concrete tank deck and liquid and heavily waits load on described pile foundation.
Above-mentioned self-support type LNG storage tank, described concrete tank skin peripheral hardware has at least 4 buttresses, can set gradually every 90 °,
Be provided with prestressing tendon in the described concrete tank skin, described prestressing tendon is anchored on the described buttress.
Above-mentioned self-support type LNG storage tank, the inboard inboard and described concrete tank deck of the upper surface of described concrete bearing platform, described concrete tank skin is provided with the lining steel plate, can be used to guarantee the tightness of described storage tank main body.
Above-mentioned self-support type LNG storage tank, the thin-walled part of described composite steel structure inner canister is provided with several stiffening rings and several strengthen fin, described reinforcement fin is along the circumferential array of described composite steel structure inner canister, described composite steel structure inner canister can be largely in the workshop or the job site fulfil ahead of schedule prefabricatedly, reduced the overhead welding installation.
Above-mentioned self-support type LNG storage tank is provided with ceiling board between the opening end of described concrete tank deck and described steel structure inner canister, and concrete material can be selected aluminum alloy or stainless steel;
Described ceiling board is provided with thermal insulation layer, so that the design temperature that the temperature of described concrete tank deck can not be cooled to be lower than it occurs with the phenomenon that prevents from freezing, makes simultaneously the BOG steam output controlled; The material of described thermal insulation layer may be selected to be glass wool or expanded perlite material, and installing needs to consider to compress the impact that causes the cold insulation thickness reduction because deadweight produces after cold insulation material uses for a long time.
Above-mentioned self-support type LNG storage tank, be provided with thermal insulation layer at the bottom of the tank at the bottom of the tank of described concrete outer tank, Main Function is to keep the LNG evaporation to be lower than specific limit, the outside non-low temperature parts of protection storage tank, it is under the desired ambient temperature, and prevents and the water vapor condensation that reduces as far as possible the storage tank outer surface and icing;
Thermal insulation layer is generally the multi cellular glass brick with certain bearing capacity at the bottom of the described tank, usually which floor foam glass brick is made of, and foam glass brick interlayer interlaced arrangement is avoided existence to run through the slit and caused reducing the cold insulation effect.The asphalt felt buffer layer that the upper and lower layer of foam glass brick all spreads one deck protection against the tide crackle do not occur so that the upper and lower layers foam glass brick can both reach in best compressive strength and the permanent using process.
Above-mentioned self-support type LNG storage tank is provided with the tank skin thermal insulation layer between the tank skin of described concrete tank skin and described steel structure inner canister.
Above-mentioned self-support type LNG storage tank; the internal surface of described concrete tank skin is provided with the hot angle of TCP protective system; be used for protecting when LNG leaks the bottom body of wall of described concrete outer tank and cushion cap to avoid low temperature to damage, it is made of two layers of base plate of 9%Ni, riser and back foam glass brick thermal insulating material.
Above-mentioned self-support type LNG storage tank, described LNG storage tank also comprises the BOG processing system, the generation of BOG boil-off gas mainly is because the input of outside energy causes in this storage tank, cause the reasons such as variation of LNG volume in the tank to produce during such as the impact of pump running, the importing of external heat, atmospheric variation, environment and LNG charging, BOG produces the excessive rising that will cause pressure of storage tank, need the compressor of suitable unlatching described BOG processing system to get rid of excessive BOG boil-off gas in order to keep the normal pressure range of storage tank this moment.
Above-mentioned self-support type LNG storage tank, the outer communication system of described LNG comprises latent liquid type centrifugal pump, pump sump and outer defeated pipeline, and described latent liquid type centrifugal pump is located in the described pump sump, and described outer defeated pipeline is connected with described pump sump.
Above-mentioned self-support type LNG storage tank, described pressure protective system comprises pressure relief valve and the antivoid valve of being located on the described concrete outer tank.
The self-support type LNG storage tank that the utility model provides has the following advantages:
(1) tank shell reaches the purpose of bearing diverse location height hydraulic pressure by encrypting fin and stiffening ring structure from top to bottom in it, so wallboard is thinner, and composite structure has reduced LNG storage tank cost of investment largely so that stock utilization is high.
(2) tank shell is thinner in it, interior tank shell, fin and stiffening ring composite structure can be in the workshop or the job site fulfil most of prefabricated installment works ahead of schedule, reduced the overhead welding installation, more traditional LNG storage tank has shortened construction period.
(3) upper interior tank shell is thinner, has broken through the aspects restrictions such as traditional LNG storage tank inner canister wall thickness, welding difficulty, so that LNG storage tank large development becomes possibility.
(4) pump sump and other pipeline, ladder adopt in tank the integral body mode that is connected in the tank, and the weight Load Transfer is born responsibility by concrete to the concrete dome and is subjected to, large vibration when the bottom is connected to interior pot bottom and avoids pump operation by embedded part.
Description of drawings
Fig. 1 is the structural representation of the utility model self-supporting LNG storage tank.
Fig. 2 is the structural representation of the composite steel structure inner canister of the utility model self-supporting LNG storage tank.
Each mark is as follows among the figure: thermal insulation layer, 6 tank skin thermal insulation layers, the hot angle of 7TCP protective system, 8 tank gut lines, ladder Integral connection structure, 9LNG feeding pipe, the outer communication system of 10LNG, 11BOG processing system, 12 pressure relief valves, 13 antivoid valves, 14 thin-walled parts, 15 are strengthened fins, 16 stiffening rings at the bottom of 1 pile foundation, 2 concrete outer tanks, 3 composite steel structure inner canisters, 4 ceiling boards (on lay the glass wool thermal insulation layer), 5 tanks.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further, but the utility model is not limited to following examples.
As shown in Figure 1, self-supporting LNG storage tank of the present utility model comprises the storage tank main body, and this storage tank main body comprises concrete outer tank 2 and the composite steel structure inner canister 3 that is sheathed in this concrete outer tank 2; Wherein, concrete outer tank 2 comprises concrete bearing platform (not shown), concrete tank skin (not shown) and the concrete tank deck (not shown) that rigidly fixes connection, and this concrete bearing platform is fixedly connected on the pile foundation 1, and this concrete bearing platform is used for transmitting with distributing concrete tank skin, concrete tank deck and liquid and heavily waits load on pile foundation 1.As shown in Figure 2, be provided with a plurality of reinforcement fins 15 and stiffening ring 16 at the thin-walled part 14 of composite steel structure inner canister 3, wherein strengthen circumferentially evenly distributed along composite steel structure inner canister 3 of fin 15.Have 4 along its buttress (not shown) that circumferentially is evenly arranged at concrete tank skin peripheral hardware, and also be provided with the tendon (not shown) outside the concrete tank skin, it is anchored on the buttress.Be equipped with the lining steel plate in the upper surface of concrete bearing platform, the inboard of concrete tank skin and the inboard of concrete tank deck, can be used to guarantee the tightness of storage tank main body, and can bear various operating mode loads.Between the opening end of concrete tank deck and composite steel structure inner canister 3, be provided with ceiling board 4, its material is aluminum alloy or stainless steel, be provided with thermal insulation layer thereon, so that the design temperature that the temperature of concrete tank deck can not be cooled to be lower than it occurs with the phenomenon that prevents from freezing, make simultaneously the BOG steam output controlled; The material of described thermal insulation layer may be selected to be glass wool or expanded perlite material, and installing needs to consider to compress the impact that causes the cold insulation thickness reduction because deadweight produces after cold insulation material uses for a long time.
Thermal insulation layer 5 at the bottom of being provided with tank at the bottom of the tank of concrete outer tank, Main Function is to keep the LNG evaporation to be lower than specific limit, the outside non-low temperature parts of protection storage tank, it is under the desired ambient temperature, and prevents and the water vapor condensation that reduces as far as possible the storage tank outer surface and icing; Thermal insulation layer 5 is generally the multi cellular glass brick with certain bearing capacity at the bottom of this tank, usually which floor foam glass brick is made of, and foam glass brick interlayer interlaced arrangement is avoided existence to run through the slit and caused reducing the cold insulation effect.The asphalt felt buffer layer that the upper and lower layer of foam glass brick all spreads one deck protection against the tide crackle do not occur so that the upper and lower layers foam glass brick can both reach in best compressive strength and the permanent using process.Between the tank skin of concrete tank skin and composite steel structure inner canister 3, be provided with tank skin thermal insulation layer 6.Internal surface at the concrete tank skin is provided with the hot angle of TCP protective system 7, and the bottom body of wall of protection concrete outer tank 2 and cushion cap are to avoid low temperature to damage when being used for the LNG leakage, and it is made of two layers of base plate of 9%Ni, riser and back foam glass brick thermal insulating material.
The tank deck of concrete outer tank 2 is connected with LNG feeding pipe 9, when coming ship LNG density to store LNG density in less than tank, also can be from bottom feed, adopting this kind feed mode mainly is in order to prevent that layering from appearring in tank inside, by the control feed entrance point unloading LNG to be mixed fully with tank inside LNG.The tank deck of concrete outer tank 2 is connected with the outer communication system 10 of LNG, be used for the outer defeated of LNG, wherein the outer communication system of this LNG comprises latent liquid type centrifugal pump (not shown), pump sump (not shown) and outer defeated pipeline (not shown), and the latent liquid type centrifugal pump is located in the pump sump, outer defeated pipeline is connected with pump sump, for delivery of LNG.
This LNG storage tank also comprises BOG compression system 11, the generation of BOG boil-off gas mainly is because the input of outside energy causes in this storage tank, cause the reasons such as variation of LNG volume in the tank to produce during such as the impact of pump running, the importing of external heat, atmospheric variation, environment and LNG charging, BOG produces the excessive rising that will cause pressure of storage tank, need suitable unlatching BOG compressor to get rid of excessive BOG boil-off gas in order to keep the normal pressure range of storage tank this moment.
This LNG storage tank also comprises pressure relief valve 12 and the antivoid valve 13 of being located on its tank deck, and decapacitation provides outside the pressure protect for storage tank, also can provide certain protection when storage tank produces superpressure and negative pressure condition.
Pump sump, feeding line and inside ladder in this storage tank link together by support, tank gut line as shown in fig. 1, ladder Integral connection structure 8 have been formed, the weight Load Transfer is born responsibility by concrete to the concrete dome and is subjected to like this, large vibration when the bottom is connected to interior pot bottom and avoids pump operation by embedded part.
When using LNG storage tank of the present utility model, should be noted that following technique:
During the LNG charging, cause the risk of " rolling " for avoiding the LNG layering, can select LNG from top supply pipe charging according to the density of LNG in the storage tank, or by bottom feed pipe underfeed.Generally speaking, heavier LNG is from the top charging, and lighter LNG is from underfeed.
During normal running, pressure of storage tank is by the operation control of BOG compressor.During unloading a ship, because the impact of the factors such as heat input that discharging causes, produce more BOG in the storage tank and be in the operation with high pressure state, can and regulate the compressor operating load according to actual pressure situation startup compressor this moment storage tank is within the routine operating pressure scope.Without unloading ship time, the storage tank operation pressure should maintain low-pressure state, in case control pressurer system breaks down, low-pressure state makes storage tank that certain space of boosting be arranged, and BOG need not to arrange immediately torch.
The pressure protect of storage tank is take gauge pressure as benchmark.First order overpressure protection row torch, when pressure of storage tank generally reached 26kPa.G, control valve was opened, and the superpressure portion gas enters flare system.Second level overpressure protection row atmosphere; When pressure of storage tank reaches 29kPa.G, the tank roof pressure relief valve is opened, and the superpressure portion gas directly enters atmosphere.Storage tank is provided with the negative pressure protection, is undertaken by the vacuum valve on the storage tank.
Claims (10)
1. self-support type LNG storage tank, it is characterized in that: described LNG storage tank comprises the storage tank main body, described storage tank main body is located on the pile foundation; Described storage tank main body comprises the concrete outer tank and is sheathed on the interior composite steel structure inner canister of described concrete outer tank;
Described concrete outer tank comprises concrete bearing platform, concrete tank skin and concrete tank deck, and described concrete bearing platform is located on the described pile foundation;
The tank deck of described concrete outer tank is connected with the LNG feeding pipe;
The tank deck of described concrete outer tank is connected with the outer communication system of LNG;
Described concrete tank deck also is connected with pressure protective system.
2. LNG storage tank according to claim 1 is characterized in that: be to rigidly fix between described concrete bearing platform and described concrete tank skin, described concrete tank skin and the described concrete tank deck and be connected;
Described concrete bearing platform is fixedly connected on the described pile foundation.
3. LNG storage tank according to claim 1 and 2, it is characterized in that: described concrete tank skin peripheral hardware has at least 4 buttresses;
Be provided with prestressing tendon in the described concrete tank skin, described prestressing tendon is anchored on the described buttress.
4. LNG storage tank according to claim 1 and 2 is characterized in that: the inboard inboard and described concrete tank deck of the upper surface of described concrete bearing platform, described concrete tank skin is provided with the lining steel plate.
5. LNG storage tank according to claim 1 and 2 is characterized in that: the tank skin of described composite steel structure inner canister is provided with several stiffening rings and several strengthen fin, and described reinforcement fin is along the circumferential array of described composite steel structure inner canister.
6. LNG storage tank according to claim 1 and 2 is characterized in that: be provided with ceiling board between the opening end of described concrete tank deck and described composite steel structure inner canister;
Described ceiling board is provided with thermal insulation layer.
7. LNG storage tank according to claim 1 and 2 is characterized in that: be provided with thermal insulation layer at the bottom of the tank at the bottom of the tank of described concrete outer tank;
Be provided with the tank skin thermal insulation layer between the tank skin of described concrete tank skin and described composite steel structure inner canister;
The internal surface of described concrete tank skin is provided with the hot angle of TCP protective system.
8. LNG storage tank according to claim 1 and 2, it is characterized in that: described LNG storage tank also comprises the BOG compression system.
9. LNG storage tank according to claim 1 and 2 is characterized in that: the outer communication system of described LNG comprises latent liquid type centrifugal pump, pump sump and outer defeated pipeline, and described latent liquid type centrifugal pump is located in the described pump sump, and described outer defeated pipeline is connected with described pump sump.
10. LNG storage tank according to claim 1 and 2, it is characterized in that: described pressure protective system comprises pressure relief valve and the antivoid valve of being located on the described concrete outer tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320124687 CN203240268U (en) | 2013-03-19 | 2013-03-19 | Self-support type LNG (Liquefied Natural Gas) storage tank |
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| CN 201320124687 CN203240268U (en) | 2013-03-19 | 2013-03-19 | Self-support type LNG (Liquefied Natural Gas) storage tank |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162085A (en) * | 2013-03-19 | 2013-06-19 | 中国海洋石油总公司 | Self-supporting type LNG (Liquefied Natural Gas) storage tank |
| CN104061432A (en) * | 2014-06-26 | 2014-09-24 | 大连理工大学 | Independent liquefied natural gas (LNG) experiment tank device |
| CN104295885A (en) * | 2014-09-30 | 2015-01-21 | 中国海洋石油总公司 | Tank wall heat-preservation system applied to novel LNG storage tank |
| CN104456059A (en) * | 2014-10-21 | 2015-03-25 | 中国海洋石油总公司 | Mounting method for inner tank wallboards of self-supporting LNG storage tank |
| CN104456062A (en) * | 2014-11-27 | 2015-03-25 | 中国海洋石油总公司 | LNG (liquefied natural gas) storage tank provided with support column |
| CN108027109A (en) * | 2015-06-30 | 2018-05-11 | 林德股份公司 | Tank and the method for manufacturing tank |
| CN110260146A (en) * | 2019-07-01 | 2019-09-20 | 中海石油气电集团有限责任公司 | A kind of low temperature full appearance tank that more material divide tank to store |
| CN110469765A (en) * | 2019-09-04 | 2019-11-19 | 中海石油气电集团有限责任公司 | A kind of LNG storage tank of point of makings storage |
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2013
- 2013-03-19 CN CN 201320124687 patent/CN203240268U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162085A (en) * | 2013-03-19 | 2013-06-19 | 中国海洋石油总公司 | Self-supporting type LNG (Liquefied Natural Gas) storage tank |
| CN103162085B (en) * | 2013-03-19 | 2015-03-04 | 中国海洋石油总公司 | Self-supporting type LNG (Liquefied Natural Gas) storage tank |
| CN104061432A (en) * | 2014-06-26 | 2014-09-24 | 大连理工大学 | Independent liquefied natural gas (LNG) experiment tank device |
| CN104061432B (en) * | 2014-06-26 | 2015-11-18 | 大连理工大学 | A kind of independent LNG experimental tank device |
| CN104295885A (en) * | 2014-09-30 | 2015-01-21 | 中国海洋石油总公司 | Tank wall heat-preservation system applied to novel LNG storage tank |
| CN104295885B (en) * | 2014-09-30 | 2016-01-13 | 中国海洋石油总公司 | Be applicable to the tank skin heat-insulation system of novel LNG storage tank |
| CN104456059A (en) * | 2014-10-21 | 2015-03-25 | 中国海洋石油总公司 | Mounting method for inner tank wallboards of self-supporting LNG storage tank |
| CN104456062A (en) * | 2014-11-27 | 2015-03-25 | 中国海洋石油总公司 | LNG (liquefied natural gas) storage tank provided with support column |
| CN108027109A (en) * | 2015-06-30 | 2018-05-11 | 林德股份公司 | Tank and the method for manufacturing tank |
| CN108027109B (en) * | 2015-06-30 | 2020-07-24 | 林德股份公司 | Tank and method for manufacturing a tank |
| CN110260146A (en) * | 2019-07-01 | 2019-09-20 | 中海石油气电集团有限责任公司 | A kind of low temperature full appearance tank that more material divide tank to store |
| CN110469765A (en) * | 2019-09-04 | 2019-11-19 | 中海石油气电集团有限责任公司 | A kind of LNG storage tank of point of makings storage |
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Granted publication date: 20131016 Effective date of abandoning: 20150304 |
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