Method and device for improving liquefied natural gas gasification energy-saving efficiency

A technology of liquefied natural gas and energy-saving efficiency, which is applied in the field of improving the energy-saving efficiency of liquefied natural gas gasification and gasification of liquefied natural gas receiving stations, can solve the problems of titanium alloy pipeline equipment load being difficult to meet the use requirements, cold energy not being utilized, and high price. , to achieve the effect of improving long-term continuous operation capacity, reducing cleaning and maintenance, and reducing investment

Inactive Publication Date: 2015-10-07
JIANGSU SUNPOWER TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the seawater gasification of the existing liquefied natural gas receiving station needs to use a large number of expensive titanium alloy pipes so that the equipment load to ensure the work of the receiving station under the influence of the cooling method is difficult to meet the use requirements, and the cooling energy wasted without being used

Method used

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  • Method and device for improving liquefied natural gas gasification energy-saving efficiency

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Embodiment 1

[0024] Such as figure 1 shown.

[0025] A method and device for improving the energy-saving efficiency of gasification of liquefied natural gas. Firstly, the liquefied natural gas vaporized by the gasifier E-2 is introduced into an independent superheater E-3 for superheating, and the liquefied natural gas that is vaporized by the gasifier E-1 is sucked The heated seawater is directly discharged, and the requirements for the use of seawater are lowered, so it can be used even in winter; secondly, the natural gas in the superheater is heated to the required temperature with fresh water, and the fresh water becomes low-temperature cold water after heat absorption by liquefied natural gas; the low-temperature cold water Introduced into the cold energy utilization equipment, the cold energy is fully utilized and then returned to the superheater to heat natural gas, realizing the recycling of fresh water, improving the working efficiency of the whole system, and increasing the ener...

Embodiment 2

[0027] A liquefied natural gas receiving station process device capable of circulating cooling system equipment, which includes:

[0028] A seawater system, which is composed of a seawater intake, a seawater pump, a seawater pipeline, a heat exchange tube bundle at the lower part of a gasifier, a drainage channel and a pipeline system, is used to provide the heat required for heating and vaporizing liquefied natural gas, and the seawater flow rate, temperature Very easy to adjust;

[0029] A propane system, which consists of a propane tank, a propane pump and a pipeline system, is used to absorb the heat of seawater in the seawater system to provide the required heat energy for the primary gasification of liquefied natural gas; during normal operation, the propane system is gasifying The gasifier is closed, neither input nor discharged. The propane in the gasifier is heated and vaporized by the lower seawater heat exchange tube bundle, and the vaporized propane rises to th...

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Abstract

A method and device for improving liquefied natural gas gasification energy-saving efficiency is characterized in that firstly, introducing liquefied natural gas which is gasified through a gasifier E-2 into an independent superheater E-3 for superheating, and then directly discharging seawater of which the heat is absorbed through a gasifier E-1, wherein the requirement on the using condition of the seawater is lower, and the seawater can be used even in winter; secondarily, heating natural gas to a required temperature by using fresh water in the superheater, and changing the fresh water into low-temperature cool water after absorbing the heat of the fresh water by the liquefied natural gas; thirdly, introducing the low-temperature cool water into a cold energy utilization device, and enabling the low-temperature cool water to return back into the superheater to heat the natural gas after the cold energy is utilized thoroughly, so as to realize the cyclic utilization of the fresh water, and improve the working efficiency of the whole system, and the energy-saving efficiency is improved by over 50 percent.

Description

technical field [0001] The invention relates to a natural gas process equipment, in particular to a gasification technology of a liquefied natural gas receiving station, in particular to a method and a device for improving energy-saving efficiency of liquefied natural gas gasification. Background technique [0002] As a cleaner, better and more economical clean energy and chemical raw material, natural gas has been recognized by the international community, and vigorous development of natural gas is in line with the trend of world energy development. In China, where environmental problems are becoming increasingly prominent, increasing natural gas consumption will also be the general trend. However, my country's energy structure is rich in coal, low in oil, and poor in gas. Therefore, it is inevitable to rely on imports of natural gas. As an important aspect of natural gas imports, the development of LNG receiving stations in recent years can be said to be spring after the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C7/04
Inventor 严涛郭宏新刘丰李晖李奇
Owner JIANGSU SUNPOWER TECH
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