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A plant for regasification of LNG

A regasification and equipment technology, which can be applied to equipment discharged from pressure vessels, mechanical equipment, and equipment discharged from non-pressure vessels, etc. It can solve the problems of expensive heat exchangers and unfavorable maintenance of all-welded heat exchangers.

Inactive Publication Date: 2015-03-25
WARTSILA OIL & GAS SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a solution with an all-welded heat exchanger is disadvantageous, for example in terms of maintenance
The use of seawater as a medium includes titanium heat exchangers which become very expensive when this heat exchanger must be constructed to resist as high a pressure as possible

Method used

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  • A plant for regasification of LNG
  • A plant for regasification of LNG
  • A plant for regasification of LNG

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Embodiment Construction

[0025] The regasification plant basically includes two circuits: a coolant circuit and an NG circuit. Propane is generally preferred as the coolant due to thermodynamic properties and freezing point, but any suitable liquid with an evaporation temperature of about 0°C at a pressure in the range of 200 kPa to 250 kPa is suitable.

[0026] For example in figure 1 As illustrated in , LNG is fed from tanks (not shown) on board the ship and into at least one high-pressure pump A1, A2 that increases the pressure of the LNG, and the pressurized LNG is pumped from said high-pressure pumps A1, A2 Flow into LNG / coolant heat exchanger B. For example, each pump is a submerged pot mounted multistage centrifugal pump. The LNG temperature is typically -160°C upon entry to the LNG / coolant heat exchanger and is preheated to -20°C and higher before exiting. Preheating is achieved by phase change for liquefied coolant similar to US Patent No. 6,945,049. The LNG / coolant heat exchanger can be...

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Abstract

A plant for regasification of LNG includes at least one pump boosting LNG pressure; an LNG / coolant heat exchanger producing NG from LNG being flowed from the boosting pumps; a closed coolant loop extending through the LNG / coolant heat exchanger and including at least one heat exchanger, a coolant from the respective heat exchanger being passed through the LNG heat exchanger as a gas and leaving in a condensed state as to produce NG by thermal exchange; and a heating medium being used within the respective heat exchanger as to provide coolant in a gaseous state. An NG / coolant heat exchanger is arranged in connection with the LNG / coolant heat exchanger and is connected to the closed coolant loop, whereby LNG is preheated within the LNG / coolant heat exchanger and NG is trim heated within the NG / coolant heat exchanger using liquid coolant from at least one heat exchanger.

Description

technical field [0001] The present invention relates to the regasification of liquefied gases, and in particular to a plant for the regasification of liquefied gases, such as liquefied natural gas (LNG), which is primarily but not exclusively intended to be installed on board sea vessels. Background technique [0002] Natural gas is produced from underground reservoirs throughout the world. Such gas, for example in the form of methane, is a valuable commodity, and a variety of methods and devices exist for extracting, processing, and transporting natural gas from the actual reservoir to consumers. The transport is usually via pipelines in which gaseous gases are transported onshore from reservoirs. However, many reservoirs are located in remote areas or areas with limited accessibility, including the utilization of pipelines, which are either technically very complex or economically uneconomical. A very common technique, then, is to liquefy the natural gas at or near the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C7/04
CPCF17C2223/0161F17C2227/0323F17C2223/033F17C2227/0185F17C2227/0135F17C2221/033F17C2227/0318F17C2270/0105F17C2227/0341F17C2265/05F17C2227/0355F17C2227/0178F17C2250/0626F17C7/04F17C2225/0123F17C2227/0393F17C9/04F17C9/02
Inventor 佩尔·海尔格·S·马德森
Owner WARTSILA OIL & GAS SYST
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