CN112923236A - Steam system for FSRU regasification process - Google Patents
Steam system for FSRU regasification process Download PDFInfo
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- CN112923236A CN112923236A CN202110274923.6A CN202110274923A CN112923236A CN 112923236 A CN112923236 A CN 112923236A CN 202110274923 A CN202110274923 A CN 202110274923A CN 112923236 A CN112923236 A CN 112923236A
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- regasification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a steam system for an FSRU regasification process, which comprises a regasification boiler system, a cabin heat energy utilization system and a seawater preheating system, wherein the steam system comprises a steam inlet, a steam outlet, a steam; the regasification boiler system comprises a regasification boiler, an auxiliary boiler and a fresh water tank; the cabin heat energy utilization system comprises a feed water preheater and a cabin waste gas economizer, and the seawater preheating system comprises a seawater preheating heat exchanger; a high-pressure steam outlet on the regasification boiler is communicated with the seawater preheating heat exchanger and/or the feed water preheater, and a flue gas outlet on the regasification boiler is communicated with the feed water preheater; a flue gas outlet on the auxiliary boiler is communicated with the feed water preheater; a water outlet on the fresh water tank is communicated with the feed water preheater; and a water outlet of the feed water preheater is communicated with the engine room waste gas economizer and the regasification boiler, and a water outlet of the engine room waste gas economizer is communicated with the auxiliary boiler.
Description
Technical Field
The invention relates to a steam system for an FSRU regasification process, and belongs to the technical field of FSRUs.
Background
An FSRU (Floating Storage and Re-gasification Unit) is a special marine device that integrates functions of Liquefied Natural Gas (LNG) Storage, transportation, gasification export, and LNG carrier sailing, and the regasification system is particularly important. With the expansion of the world LNG market and the improvement of the FSRU core gasification process technology, the sea area range to which the FSRU is adapted is wider, the corresponding process condition is more complicated, and higher requirements are put forward on the FSRU regasification system.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a steam system for FSRU regasification process, which can utilize excess BOG and flue gas generated by combustion thereof, effectively reducing the overall energy consumption of the FSRU regasification process.
In order to achieve the purpose, the invention adopts the following technical scheme: a steam system for an FSRU regasification process includes a regasification boiler system, a cabin heat energy utilization system, and a seawater preheating system; the regasification boiler system comprises a regasification boiler, an auxiliary boiler and a fresh water tank; the cabin heat energy utilization system comprises a feed water preheater and a cabin waste gas economizer, and the seawater preheating system comprises a seawater preheating heat exchanger;
a high-pressure steam outlet on the regasification boiler is communicated with the seawater preheating heat exchanger and/or the feed water preheater, and a flue gas outlet on the regasification boiler is communicated with the feed water preheater;
a flue gas outlet on the auxiliary boiler is communicated with the feed water preheater;
a water outlet on the fresh water tank is communicated with the feed water preheater;
and a water outlet of the feed water preheater is communicated with the engine room waste gas economizer and the regasification boiler, and a water outlet of the engine room waste gas economizer is communicated with the auxiliary boiler.
In some embodiments, the regasification boiler system further comprises an atmospheric evacuation condenser, the high pressure steam outlet on the regasification boiler is communicated with the atmospheric evacuation condenser, the steam outlet on the feed water preheater is communicated with the atmospheric evacuation condenser, and the steam outlet of the seawater preheating heat exchanger is communicated with the atmospheric evacuation condenser; the normal pressure emptying condenser is communicated with the fresh water tank.
In some embodiments, a low pressure steam outlet on the auxiliary boiler communicates with an external system and/or an atmospheric evacuation condenser.
In some embodiments, the external system includes other steam systems onboard the supply vessel.
By adopting the technical scheme, the invention has the following advantages: the system comprises a regasification boiler system, a cabin heat energy utilization system and a seawater preheating system, wherein the regasification boiler system comprises a regasification boiler, an auxiliary boiler, a normal-pressure emptying condenser and a fresh water tank; the regasification boiler system can preheat heat source seawater of the regasification module in the FSRU, so that the applicable sea area range of the FSRU is widened; the steam generated by the regasification boiler system and the flue gas generated by combustion of the BOG can also preheat the feed water for the engine room waste gas economizer, the temperature of the feed water is increased after the heat energy of the engine waste gas is utilized, the feed water enters the auxiliary boiler, in addition, the excess BOG can also supply energy to the auxiliary boiler, and the feed water is converted into low-pressure steam in the auxiliary boiler and is supplied to other systems on the ship for use.
Drawings
FIG. 1 is a schematic illustration of a steam system for an FSRU regasification process provided by an embodiment of the present invention;
in the figure, 1-a regasification boiler, 2-an auxiliary boiler, 3-a normal pressure emptying condenser and 4-a fresh water tank; 5-feed water preheater, 6-cabin waste gas economizer; 7-seawater preheating heat exchanger.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", "transverse", "vertical", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in 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 in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated have no special meaning and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 disclosed embodiment provides a steam system for an FSRU regasification process, comprising a regasification boiler system, a cabin heat energy utilization system and a seawater preheating system; the regasification boiler system comprises a regasification boiler, an auxiliary boiler and a fresh water tank; the cabin heat energy utilization system comprises a feed water preheater and a cabin waste gas economizer, and the seawater preheating system comprises a seawater preheating heat exchanger; a high-pressure steam outlet on the regasification boiler is communicated with the seawater preheating heat exchanger and/or the water supply preheater, and a flue gas outlet on the regasification boiler is communicated with the water supply preheater; the smoke outlet on the auxiliary boiler is communicated with the water supply preheater; a water outlet on the fresh water tank is communicated with the feed water preheater; the water outlet of the feed water preheater is communicated with the cabin waste gas economizer and the regasification boiler; the water outlet of the engine room waste gas economizer is communicated with the auxiliary boiler.
In view of the characteristic that low-temperature LNG is easy to evaporate to generate excessive boil-off gas (BOG), the excessive BOG is used for supplying energy to a regasification boiler, and high-pressure steam is used as a heating medium to preheat heat source seawater of a regasification module in the FSRU, so that the applicable sea area range of the FSRU can be widened; meanwhile, the steam of the regasification boiler and the flue gas generated by combustion of the BOG can also preheat the feed water for the engine room exhaust gas economizer, the temperature of the feed water is increased after the heat energy of the engine exhaust gas is utilized, the feed water enters the auxiliary boiler, in addition, the Excess BOG can also supply energy to the auxiliary boiler, and the feed water is converted into low-pressure steam in the auxiliary boiler to be supplied to a system on a ship for use, so that the invention realizes effective utilization of Excess boil-off gas (Excess boil-off gas) and the flue gas generated by combustion of the Excess boil-off gas, improves the steam system of the FSRU, and can effectively reduce the overall energy consumption and the.
A steam system for an FSRU regasification process according to embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the invention provides a steam system for FSRU regasification process, comprising a regasification boiler system, a cabin heat energy utilization system and a seawater preheating system; the regasification boiler system comprises a regasification boiler 1, an auxiliary boiler 2, a normal-pressure emptying condenser 3 and a fresh water tank 4; the cabin heat energy utilization system comprises a feed water preheater 5 and a cabin waste gas economizer 6, and the seawater preheating system comprises a seawater preheating heat exchanger 7;
a high-pressure steam outlet on the regasification boiler 1 is communicated with a feed water preheater 5, a normal-pressure emptying condenser 3 and/or a seawater preheating heat exchanger 7, and a flue gas outlet on the regasification boiler 1 is communicated with the feed water preheater 5; a low-pressure steam outlet on the auxiliary boiler 2 is communicated with an external system and/or a normal-pressure emptying condenser 3, and a flue gas outlet on the auxiliary boiler 2 is communicated with a feed water preheater 5; the normal pressure emptying condenser 3 is communicated with a fresh water tank 4; a water outlet on the fresh water tank 4 is communicated with a feed water preheater 5; a water outlet of the feed water preheater 5 is communicated with the cabin waste gas economizer 6 and the regasification boiler 1, and a steam outlet on the feed water preheater 5 is communicated with the normal-pressure emptying condenser 3; the water outlet of the engine room waste gas economizer 6 is communicated with the auxiliary boiler 2; the steam outlet of the seawater preheating heat exchanger 7 is communicated with the atmospheric evacuation condenser 3.
When the steam system provided by the invention works, the regasification boiler 1 burns excessive BOG (Excess boil-off gas) generated in the cabin, so that fresh water in the regasification boiler 1 is vaporized to generate high-pressure steam, the high-pressure steam can be supplied to the seawater preheating heat exchanger 7 to exchange heat with seawater entering the seawater preheating heat exchanger 7, and the temperature of the seawater entering the LNG regasification unit is increased. When the steam generated by the regasification boiler 1 is excessive, the high-pressure steam can supply seawater to the preheating evaporator 7 and also can supply water to the feed water preheater 5, when the high-pressure steam is introduced into the feed water preheater 5, the high-pressure steam heats the fresh water supplied from the fresh water tank 4 into the feed water preheater 5, so that the water temperature of the regasification boiler 1 and the engine room waste gas economizer 6 is increased, meanwhile, the flue gas generated by the regasification boiler 1 is led to the feed water preheater 5, the water temperature in the feed water preheater 5 is increased, and the water temperature in the regasification boiler 1 and the engine room waste gas economizer 6 is proper. In addition, the high-pressure steam outlet of the regasification boiler 1 is communicated with the normal-pressure evacuation condenser 3, so that pressure protection of a steam system can be realized, and when the high-pressure steam is introduced into the normal-pressure evacuation condenser 3, the high-pressure steam is condensed and liquefied in the normal-pressure evacuation condenser 3 and is conveyed to the fresh water tank 4, so that recycling of fresh water is realized.
The auxiliary boiler 2 simultaneously burns the excessive BOG generated by the cabin, so that the water supplied to the auxiliary boiler 2 by the cabin waste gas economizer 6 is vaporized to generate low-pressure steam, the low-pressure steam can be used for an external system (for example, other steam systems on a supply ship), the redundant low-pressure steam can be led into the normal-pressure emptying condenser 3, and the fresh water generated by condensation and liquefaction is conveyed into the fresh water tank 4, so that the fresh water can be recycled. The flue gas generated by the auxiliary boiler 2 can supply energy to the feed water preheater 5, and the water temperature in the feed water preheater 5 is increased, so that the water temperature in the waste gas economizer 6 of the re-gasification boiler 1 and the engine room is proper.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A steam system for an FSRU regasification process, characterized by: the system comprises a regasification boiler system, a cabin heat energy utilization system and a seawater preheating system; the regasification boiler system comprises a regasification boiler, an auxiliary boiler and a fresh water tank; the cabin heat energy utilization system comprises a feed water preheater and a cabin waste gas economizer, and the seawater preheating system comprises a seawater preheating heat exchanger;
a high-pressure steam outlet on the regasification boiler is communicated with the seawater preheating heat exchanger and/or the feed water preheater, and a flue gas outlet on the regasification boiler is communicated with the feed water preheater;
a flue gas outlet on the auxiliary boiler is communicated with the feed water preheater;
a water outlet on the fresh water tank is communicated with the feed water preheater;
and a water outlet of the feed water preheater is communicated with the engine room waste gas economizer and the regasification boiler, and a water outlet of the engine room waste gas economizer is communicated with the auxiliary boiler.
2. The steam system for an FSRU regasification process of claim 1, wherein: the system comprises a seawater preheating heat exchanger, a feed water preheater, a normal-pressure emptying condenser, a high-pressure steam outlet, a steam outlet and a steam outlet, wherein the high-pressure steam outlet is communicated with the normal-pressure emptying condenser; the normal pressure emptying condenser is communicated with the fresh water tank.
3. A steam system for an FSRU regasification process in accordance with claim 2, wherein: and a low-pressure steam outlet on the auxiliary boiler is communicated with an external system and/or a normal-pressure emptying condenser.
4. A steam system for an FSRU regasification process in accordance with claim 3, wherein: the external system includes other steam systems on the supply vessel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274923.6A CN112923236A (en) | 2021-03-15 | 2021-03-15 | Steam system for FSRU regasification process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110274923.6A CN112923236A (en) | 2021-03-15 | 2021-03-15 | Steam system for FSRU regasification process |
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| CN112923236A true CN112923236A (en) | 2021-06-08 |
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| CN202110274923.6A Pending CN112923236A (en) | 2021-03-15 | 2021-03-15 | Steam system for FSRU regasification process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101057101A (en) * | 2004-11-08 | 2007-10-17 | 国际壳牌研究有限公司 | Liquefied natural gas floating storage regasification unit |
| US20120048215A1 (en) * | 2010-09-01 | 2012-03-01 | Hicks Timothy E | Steam cycle efficiency improvement with pre-economizer |
| CN103842626A (en) * | 2011-10-24 | 2014-06-04 | 三菱重工业株式会社 | Liquefied gas treatment system, control method therefor, liquefied gas carrier provided therewith, and liquefied gas storage facility provided therewith |
| CN109386316A (en) * | 2017-08-08 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of LNG cold energy and BOG Combustion Energy joint utilize system and method |
| CN111623232A (en) * | 2020-05-31 | 2020-09-04 | 华南理工大学 | BOG and LNG cold energy comprehensive recycling system and process |
| CN111878701A (en) * | 2020-08-25 | 2020-11-03 | 中海石油气电集团有限责任公司 | Regasification system and method for offshore liquefied natural gas |
-
2021
- 2021-03-15 CN CN202110274923.6A patent/CN112923236A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101057101A (en) * | 2004-11-08 | 2007-10-17 | 国际壳牌研究有限公司 | Liquefied natural gas floating storage regasification unit |
| US20120048215A1 (en) * | 2010-09-01 | 2012-03-01 | Hicks Timothy E | Steam cycle efficiency improvement with pre-economizer |
| CN103842626A (en) * | 2011-10-24 | 2014-06-04 | 三菱重工业株式会社 | Liquefied gas treatment system, control method therefor, liquefied gas carrier provided therewith, and liquefied gas storage facility provided therewith |
| CN109386316A (en) * | 2017-08-08 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of LNG cold energy and BOG Combustion Energy joint utilize system and method |
| CN111623232A (en) * | 2020-05-31 | 2020-09-04 | 华南理工大学 | BOG and LNG cold energy comprehensive recycling system and process |
| CN111878701A (en) * | 2020-08-25 | 2020-11-03 | 中海石油气电集团有限责任公司 | Regasification system and method for offshore liquefied natural gas |
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