Rich-oxygen and pure oxygen burning tunnel kiln

Abstract

The invention provides an oxygen-enriched and total-oxygen burning tunnel kiln, comprising a preheating area (2), a sintering area (3), a fuel and combustion-supporting medium feeding system (4), a smoke exhaust system (5), a quench area, a cooling area, a temperature control system, a burning system and a waste heat system. The tunnel kiln is used for a combustion-supporting medium with the volume concentration of at least 21 percent of oxygen and the fuel to burn together inside a burner (6), no air combustion-supporting fan is required, the burner (6) is installed at the position of a burner brick (7). In order to solve the problem that the exhaust emission quantity of a ceramic tunnel kiln is large, the invention adopts the high concentration oxygen burning tunnel kiln which has high thermal efficiency, so compared with the combustion which considers the air as the combustion-supporting medium, the burning product quantity is reduced more than 50 percent, the nitrogen oxide produced by the invention is reduced greatly, the invention can reduce the energy consumption more than 10 percent, and the harmful substance emission can be reduced to the minimum.

Description

technical field [0001] The invention relates to a ceramic kiln, in particular to a pure oxygen combustion tunnel kiln using high-concentration oxygen including pure oxygen as a combustion-supporting medium. Background technique [0002] Global warming has become increasingly serious, and the emission of greenhouse gases has attracted the attention of countries all over the world and the Chinese government. The acceleration of climate warming has seriously affected economic development. China is the world's largest producer of ceramics and refractory materials. The total output of ceramics is close to 50% of the world's total output. The emissions of carbon dioxide, nitrogen oxides and waste gas are also large in the world's ceramic industry. Reducing the energy consumption, carbon dioxide, nitrogen oxides and waste gas emissions of ceramic and refractory kilns, that is, tunnel kilns and tunnel kilns, has become the research and development direction of countries all over th...

AI Technical Summary

Problems solved by technology

The combustion of traditional industrial furnaces uses air as the combustion-supporting medium. The oxygen content in the air is 21%, and the nitrogen content is 78%. During the combustion process with air as the combustion-supporting medium, a large amount of heat generated by combustion is used to heat nitrogen. Low thermal efficiency, high energy consumption, large amount of combustion products, especially the large amount of nitrogen oxides that are extremely harmful to the atmosphere

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