LNG cold energy gradient utilization method for conducting power generation by adopting cold energy

Abstract

The invention discloses an LNG cold energy gradient utilization method for conducting power generation by adopting cold energy. The LNG cold energy gradient utilization method comprises the followingsteps that S1, power generation is conducted by utilizing the LNG cold energy; S2, oilfield associated gas condensate recovery or preparation of liquefied CO2 and dry ice or cryogenic pulverization ofwaste rubber is conducted by utilizing the LNG cold energy which completes power generation; and S3, warehouse refrigeration or sea water desalination is conducted by utilizing the LNG cold energy which completes oilfield associated gas condensate recovery or preparation of the liquefied CO2 and the dry ice or cryogenic pulverization of the waste rubber. The LNG cold energy gradient utilization method has the beneficial effects that under the premise that the requirements of different users for the operating characteristics are met, optimal configuration of the cold energy among the multipleusers is arranged, and gradient utilization of the cold energy is achieved. A three-level utilization scheme is formulated according to the requirements of various cold energy utilization technologiesfor the temperature levels, the LNG cold energy recovery rate is increased, the LNG vaporization cost is reduced, and the LNG cold energy gradient utilization method is of great significance for saving the energy and improving the energy utilization efficiency.

Description

technical field [0001] The invention relates to the technical field of LNG cold energy utilization, in particular to a cascaded utilization method of LNG cold energy for power generation using 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 transportation. The ...

AI Technical Summary

Problems solved by technology

At present, in the utilization of cold energy of LNG, there are low utilization efficiency of cold energy, Due to the large loss phenomenon, most of the cold energy carried by LNG has not been rationally utilized

[0006] At present, the design of some cascade cold energy utilization processes lacks strong theoretical arguments, or there is a disconnect between theory and actual utilization. The cascade utilization of LNG cold energy is only studied from the perspective of energy, while the quality of LNG cold energy is ignored, resulting in the actual Cold st...

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