Apparatus and method for cooling liquefied gas
A technology for liquefied gas and liquefied natural gas, which is applied in chemical instruments and methods, methods for container discharge, installation devices for container structures, etc., and can solve problems such as the inability to significantly reduce natural evaporation.
Active Publication Date: 2020-08-07
GAZTRANSPORT & TECHNIGAZ SA
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- Application Information
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Problems solved by technology
However, although this method makes it possible to evaporate the boil-off gas in the tank, it cannot significantly reduce the natural evaporation
Method used
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[0080] In the description and claims, the term "gas" is of a general nature and designates without preference a gas consisting of a single pure substance or a gas mixture consisting of several components. Thus, a liquefied gas describes a chemical entity or a mixture of chemical entities that has been placed in the liquid phase at low temperatures and would appear in the vapor phase under normal conditions of temperature and pressure.
[0081] figure 1 A liquefied gas storage and cooling device 1 according to a first embodiment is shown. Such a device 1 can be installed on shore or on a floating structure. In the case of onshore structures, the device can be used to store liquefied natural gas with units consuming the gas in vapor form. These consuming units may be generator sets, steam generators, burners or any other unit consuming gas in the form of steam, whether adjacent to a storage or a steam distribution network supplied by said storage.
[0082] In the case of floa...
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The invention relates to an evaporation device (4) for cooling a liquefied gas, said evaporation device (1) comprising an evaporation chamber (14) arranged inside a container (2, 19) filled with a liquefied gas (3) In space, the evaporation chamber (14) includes heat exchange walls (6) that allow heat exchange between the interior space of the evaporation chamber (14) and the liquefied gas (3) present in the interior space of the container (2, 19). exchange; an inlet circuit (5) comprising an inlet formed in the inner space of the vessel (2,19) for drawing a stream of liquefied gas in liquid phase from the vessel (2,19), and formed in the evaporation chamber ( 14) head loss component (13) in the internal space to expand the extracted air flow; the outlet circuit (7) is used to discharge the extracted air flow from the evaporation chamber (14) to the vapor phase gas use circuit (8) in gas phase The outlet circuit (7) includes a vacuum pump (9), which can suck the airflow into the evaporation chamber (14), discharge the airflow to the vapor phase gas use circuit (8), and be able to maintain the airflow in the evaporation chamber (14) Absolute pressure is less than atmospheric pressure.
Description
technical field [0001] The present invention relates to the field of cooling of gases stored in liquefied form, and in particular to the cooling of fuel gases such as liquefied natural gas (LNG). Background technique [0002] LNG is stored at cryogenic temperatures in tightly insulated tanks. Such tanks may form part of onshore storage, or be installed in floating structures such as methane tankers. [0003] The insulation of LNG storage tanks is inevitably in a position of heat flux, tending to reheat the contents of the tank. This reheating reflects an increase in the heat content of the tank contents, thereby isolating all or part of the cargo from equilibrium conditions at sub-atmospheric pressure. Therefore, this increase in heat content can lead to vaporization of LNG and loss of natural gas stored in liquid form. [0004] In order to limit the increase in the heat content of the LNG, the insulation of the tanks is regularly increased. However, despite the trend to...
Claims
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IPC IPC(8): F17C1/12F17C9/02B01D1/00B01D1/16
CPCB01D1/0082B01D1/16F17C1/12F17C9/02F17C2221/033F17C5/06F17C6/00F17C9/04F17C2201/0104F17C2201/0128F17C2201/0152F17C2201/0157F17C2201/052F17C2201/054F17C2203/0358F17C2203/0631F17C2205/0338F17C2205/0341F17C2205/0355F17C2221/032F17C2221/035F17C2223/0161F17C2223/0169F17C2223/033F17C2223/041F17C2223/046F17C2223/047F17C2225/0123F17C2225/033F17C2225/038F17C2227/0114F17C2227/0135F17C2227/0178F17C2227/0306F17C2227/0339F17C2227/036F17C2227/0372F17C2227/0374F17C2227/0379F17C2227/0393F17C2227/0397F17C2250/01F17C2250/03F17C2250/043F17C2250/0443F17C2250/0626F17C2250/0636F17C2260/031F17C2265/066F17C2265/07F17C2270/0105F17C2270/0107F17C2270/0136F17C13/004
Inventor 布鲁诺·德莱特雷
Owner GAZTRANSPORT & TECHNIGAZ SA