LNG cold energy temperature difference power generation system based on seawater gasifier

Abstract

The invention relates to an LNG cold energy temperature difference power generation system based on a seawater gasifier. The system comprises an LNG inlet pipe, a natural gas outlet pipe, a seawater inlet pipe, seawater showers, thermoelectric modules, a heat transfer pipe bundle and a temperature equalizing plate. The bottom of the heat transfer pipe bundle is connected with the LNG inlet pipe. The top of the heat transfer pipe bundle is connected with the natural gas outlet pipe. A number of thermoelectric modules are laid on the outer surface of the whole plane of the heat transfer pipe bundle. Uniform temperature plates are laid on the outer surface of a number of thermoelectric modules. Seawater showers are arranged at the top of the heat transfer pipe bundle and on left and right sides below the natural gas outlet pipe. Each seawater shower is connected with the seawater inlet pipe. The spray tip of each seawater sprayer faces the heat transfer pipe bundle. According to the invention, the seawater gasifier and the thermoelectric modules are combined; temperature difference power generation of cold energy is realized without affecting normal gasification of LNG; the system hasthe advantages of convenient maintenance and high power generation efficiency, can effectively alleviate the problem of icing on the surface of a gasification pipe during LNG gasification, and can adapt to fluctuations in LNG flow.

Description

technical field [0001] The invention relates to the field of thermoelectric power generation combined with LNG cold energy recovery and utilization, in particular to an LNG cold energy thermoelectric power generation system based on a seawater gasifier. Background technique [0002] With the increasingly severe environmental problems and the enhancement of people's awareness of energy conservation and environmental protection, natural gas, as a clean energy, has been widely used in the production and life of the people. Liquefied natural gas (LNG) has become the main mode of marine transportation of natural gas due to its high energy density and convenient storage and transportation. At the LNG receiving station, LNG with a temperature of -162°C needs to be gasified before it can be transported to users. During the LNG gasification process, about 830-860MJ of cold energy will be released per ton of LNG. The traditional gasification method directly discharges the cold energ...

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Problems solved by technology

Although these methods can recycle LNG cold energy, they need to build a power cycle system, the system equipment is complicated, the cost is high, and the equipment operation and maintenance are inconvenient, which restricts its application and promotion.

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