A combined natural gas and steam power generation device for power generation ships

Abstract

The invention discloses a natural gas and steam combined power generation device used on a power generation ship, and aims to solve the problem of low waste heat utilization rate of the existing marine gas-fired power generation unit. The invention includes a liquefied natural gas storage tank, a regasification buffer tank, a natural gas generator, a steam generator, a waste heat exchanger, a gasification pipeline connected between the liquefied natural gas storage tank and the regasification buffer tank, and the regasification buffer tank The natural gas generator supplies natural gas for the power generation of the natural gas generator. The flue gas discharged by the natural gas generator first heats the waste heat heat exchanger to generate steam, and then the flue gas heats the natural gas in the gasification channel, and the waste heat heat exchanger The steam generated in the steam generator is used for power generation of the steam generator, and the waste heat of the steam generator heats the natural gas in the gasification channel. The waste heat generated by the natural gas generator is used for the waste heat exchanger to generate steam, and the steam drives the steam generator to work to form a combined power generation of natural gas and steam, with high utilization rate of waste heat.

Description

technical field [0001] The present invention relates to a power generating device, more particularly, it relates to a natural gas and steam combined power generating device used on a power generating ship. Background technique [0002] The energy conversion efficiency of traditional marine gas generator sets is only about 38%, and a large amount of calorific value is taken away by cooling water or discharged into the atmosphere with flue gas, resulting in waste of heat. Existing technologies also utilize waste heat, such as using heat to produce fresh water and using heat to regasify liquefied natural gas. Although energy loss is reduced, most of the remaining heat value cannot be fully utilized. Contents of the invention [0003] The invention overcomes the deficiency of the low waste heat utilization rate of the existing marine gas-fired generator sets, and provides a natural gas and steam combined power generation device for power generation ships. The waste heat genera...

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Problems solved by technology

[0003] The invention overcomes the deficiency of the low waste heat utilization rate of the existing marine gas-fired generator sets, and provides a natural gas and steam combined power generation device for power generation ships. The waste heat generated by the natural gas generator is used for the waste heat exchanger to generate steam, and the steam drives The steam generator works to form a combined power generation of natural gas and steam, and the utilization rate of waste heat is high

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