Method and device for high-temperature combustion using fuel and aqueous solution of organic compound

Abstract

A method and a device are disclosed with which high-temperature combustion is attained using a fuel and an aqueous solution of an organic compound, e.g., an aqueous alcohol solution. In a combustion chamber, a fuel is sprayed and burned with a first burner to elevate the interior temperature of the combustion chamber (and / or a heat-resistant reflector disposed inside the combustion chamber) to a high temperature of 700° C. or above, and an aqueous solution of an organic compound (e.g., an alcohol-water mixture) is subsequently sprayed with a second burner into the high-temperature combustion gas obtained with the first burner, thereby causing microexplosion of water vaper and further elevating the interior temperature. As such, the fuels and organic compounds (e.g., Alcoholic aqueous solution) are fully burned, and thus the fuel cost can be reduced. Thus, high-temperature superheated steam containing a large amount of water vapor is yielded.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a method and a device for combustion of an aqueous solution of an organic compound. In particular, it relates to a method and a device for high-temperature combustion in which an aqueous solution of an organic compound like an aqueous alcohol solution and fuel are used.[0003]2. Description of the Related Art[0004]With regard to a conventional method for combustion by using liquid fuel and adding hydrous fuel containing an organic compound, examples of the organic compound for an aqueous solution of an organic compound (hereinbelow, referred to as an “organic aqueous solution”) include alcohols, organic acids, and aldehyde ketones. Examples of the organic aqueous solution include organic waste water, which is an industrial waste.[0005]For combustion of an organic aqueous solution, a common practice includes that an organic aqueous solution is slowly added thereto for combustion while heav...

AI Technical Summary

Benefits of technology

[0016]According to the invention, in a combustion chamber, a fuel is sprayed and burned with a first burner to elevate the interior temperature of the combustion chamber to a high temperature of 700° C. or above, and an aqueous solution of an organic compound is subsequently sprayed with a second burner into the high-temperature combustion gas obtained with the first burner, consequently causing mixing and burning. Thus, compared to a case in which combustion is carried out by using only fuels or an aqueous solution of an organic compound, interior temperature of the combustion chamber and / or temperature of a chamber for heat treatment can be synergistically increased to high temperature. As such, the fuels and organic compounds are fully burned, and thus the fuel cost can be reduced.

Problems solved by technology

First, with regard to the condition at which water vapor microexplosion occurs, it involves instantaneous temperature increase of an organic aqueous solution to high temperature, and for example, water vapor microexplosion is caused by collision on surface of a solid at high temperature.

If no water vapor microexplosion occurs, only a simple aqueous gas reaction of water vapor and organic compounds contained in an organic aqueous solution and an oxidation reaction of air will occur, and therefore it is difficult to expect a significant increase in combustion efficiency.

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