Solar Boiler System
a solar collector and solar energy technology, applied in the field of solar collector systems, can solve the problems of not revealing any application of solar thermal energy and significant increase in so as to reduce the installation cost of solar collectors, improve gross thermal efficiency, and minimize the effect of air temperature ris
Inactive Publication Date: 2012-10-11
MITSUBISHI HITACHIPOWER SYST LTD
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Benefits of technology
The present invention is a solar boiler system that uses solar thermal energy to improve efficiency and minimize air temperature rise. The system includes a boiler, primary and secondary air systems, and a secondary air superheater. The secondary air superheater further superheats the preheated air for combustion with solar thermal energy. This system can suppress the installation cost for a solar collector and significantly improve gross thermal efficiency.
Problems solved by technology
Therefore, the conventional technology involves a problem contradictory to the increase in air temperature up to 1000° C. or higher in that the installation cost of the solar collector is significantly increased.
It should be noted that the above-mentioned conventional technologies do not disclose any application of solar thermal energy to a boiler system.
Method used
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[0012]An embodiment of a solar boiler system according to the present invention applied to a coal-fired thermal power boiler will hereinafter be described with reference to the drawings. Incidentally, equivalent constituent elements are denoted with like reference numerals throughout all figures.
[0013]The embodiment according to the present invention described below includes a smoke wind tunnel of a boiler in a steam power plant; a solar heat recovery apparatus; and a system for inputting solar heat energy recovered by the solar heat recovery apparatus to a boiler furnace via a secondary air superheater. The steam power plant corresponds to one mode of thermal power generation. Incidentally, the solar heat recovery apparatus is described by taking a trough type as an example. However, the same holds true for a tower type. Oil is here used as a heat medium for recovering solar thermal energy. However, the same hold true for other heat media containing water. Further, molten salt is e...
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It is an object of the present invention to provide a solar boiler system that can suppress the installation cost for a solar heat collector and significantly improve gross thermal efficiency while minimizing a rise in air temperature resulting from the collected solar heat.The solar boiler system of the present invention includes a boiler for burning fossil fuel; a primary air system for pneumatically transporting pulverized fossil fuel to a burner attached to the boiler; a secondary air system for supplying preheated air for combustion to the boiler; and a secondary air superheater provided at the secondary air system, the secondary air superheater further superheating the preheated air for combustion with solar thermal energy.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a solar boiler system to which solar thermal energy is applied.[0003]2. Description of the Related Art[0004]For example, a solar thermal gas turbine as disclosed in JP-2010-275997-A is used for a thermal power system equipped with a solar heat recovery apparatus. JP-2010-275997-A proposes the following system. A solar-heat receiving unit is installed on the leading end of a tower having a height of approximately 100 m from the ground. Solar light reflected from a large number of reflecting mirrors installed on the ground is collected in the solar-heat receiving unit. High-pressure air supplied from a compressor installed on the ground is superheated with the solar light thus collected, with the result that high-temperature air is produced. This high pressure and high temperature air is made to flow in a high temperature and high pressure expansion turbine installed on the leading end of ...
Claims
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IPC IPC(8): F23L15/00F23D1/00F23K3/02F24S90/00
CPCF23C7/08F23L2900/15044F23L15/045Y02E20/34
Inventor MISHIMA, NOBUYOSHISUGIURA, TAKASHISAKAKURA, TOSHIHIKO
Owner MITSUBISHI HITACHIPOWER SYST LTD