LNG cold energy gradient utilization method for recovering light hydrocarbon by adopting cold energy

A light hydrocarbon recovery and cold energy technology, which is applied in the direction of cold treatment separation, refrigeration and liquefaction, liquefaction, etc., can solve the problems of unreasonable utilization of cold energy, reduced effect of cold energy utilization, and large losses, so as to improve energy utilization efficiency, The effect of improving the recovery rate of cooling capacity and reducing the cost of vaporization
CN107940893AInactive Publication Date: 2018-04-20SICHUAN JINYING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN JINYING TECH CO LTD
Publication Date
2018-04-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a LNG cold energy gradient utilization method for recovering light hydrocarbon by adopting cold energy. The method comprises the following steps: (S1) the light hydrocarbon isrecovered by using LNG cold energy; (S2) the oil field associated gas condensate recovery or the liquefied CO2 and dry ice preparation or the low-temperature crushing of waste rubber is performed by using the LNG cold energy after recovery of the light hydrocarbon; and (S3) the warehouse refrigeration or the seawater desalination is performed by using the LNG cold energy after the oil field associated gas condensate recovery or the liquefied CO2 and dry ice preparation or the low-temperature crushing of the waste rubber. The method has the following beneficial effects: under the precondition of meeting different user operation characteristics, optimal configuration of the cold energy among multiple users is arranged to realize gradient utilization of the cold energy. According to demands of various cold energy utilization processes on temperature levels, three grades of utilization schemes are formulated, so that the LNG cold energy recovery rate is increased, the LNG vaporization costis reduced, and important significance on improvement of the energy utilization efficiency is achieved.
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Description

technical field

[0001] The invention relates to the technical field of LNG cold energy utilization, in particular to a method for cascaded utilization of LNG cold energy by recovering light hydrocarbons from the cold energy. Background technique

[0002] Since the beginning of the 21st century, the world's oil prices have soared, and energy and electricity costs have increased significantly. In the form of China's rapid economic development, it is imperative to save energy and improve energy utilization. As a clean and efficient energy source, LNG is favored by countries all over the world, which has also brought about the rapid development of the LNG industry (an average annual growth rate of 20%).

[0003] LNG is a low-temperature (-162°C) liquid mixture made of low-pollution natural gas after deacidification and dehydration treatment, and freezing and liquefaction through a low-temperature process. Its density is increased by about 600 times to facilitate long-distance tr...

Claims

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