Multipurpose Thermal Power Plant System

Abstract

To provide a multipurpose thermal power plant system capable of capturing moisture and carbon dioxide in large quantities at a low cost from exhaust gas of an oxygen combustion boiler.To use an oxygen combustion boiler 1, an oxygen separator 6, a coal fuel feed apparatus 7, a steam turbine 2, a generator 3, denitrification equipment 10, a gas heat exchanger 11, a condensate cooler 12 for cooling exit gas of the gas heat exchanger with a condensate at an exit of a condenser which is a part of steam cycle water of the turbine, a dust collector 13, a desulfurizer 14, a cooling water-desalination apparatus 15, and a carbon dioxide liquefier 16, to utilize the characteristic that main components of exhaust gas of the oxygen combustion boiler 1 after combustion are carbon dioxide gas and steam, and to simultaneously capture moisture and carbon dioxide in the gas by cooling and compressing the exhaust gas. And to install a water feed system for utilizing the captured moisture as cycle water of a steam-water cycle of the steam turbine.

Description

CLAIM OF PRIORITY[0001]The present application claims priority from Japanese patent application JP 2010-210356 filed on Sep. 21, 2010, the content of which is hereby incorporated by reference into this application.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a multipurpose thermal power plant system and more particularly to a fossil fuel combustion multipurpose thermal power plant system having a function for simultaneously performing the three great functions of water desalination, carbon dioxide capture, and power generation, or simultaneously performing the power generation function and water desalination function or carbon dioxide capture function.[0004]2. Description of Related Art[0005]A thermal power plant having the water desalination function for bleeding steam from the steam turbine cycle for generating power, thereby producing fresh water from seawater is already put into practical use. Furthermore, a coal fuel combustio...

AI Technical Summary

Benefits of technology

The present invention provides a multipurpose thermal power plant system that can capture moisture and carbon dioxide from the exhaust gas of an oxygen combustion boiler. This system can use various fuels such as liquefied natural gas, oxygen, or hydrogen as fuel and can be used in a variety of applications such as power generation and industrial heating. The system includes an oxygen combustion boiler, steam turbine, generator, and various heat exchangers to perform heat exchange and cooling. The captured moisture and carbon dioxide can be utilized as cycle water of the steam turbine or for other purposes. The system is designed to capture a large amount of moisture and carbon dioxide in a cost-effective manner.

Problems solved by technology

Regarding it, it is inferred that the quantity of moisture generated by the cooling and dehumidification equipment is not sufficient for effective use.

A large amount of moisture is included in the exhaust gas of the oxygen combustion boiler, though moisture generated by the conventional cooling and dehumidification equipment is not in a large amount, thus a large amount of moisture in the exhaust gas is discharged outside the system without being used effectively.

However, in the conventional system, the amount of water captured is not sufficient for utilization as cycle water of the steam-water cycle of the steam turbine.

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