Solid fuel high-temperature oxygen-deficient combustion method and device

Abstract

The invention provides a solid fuel high-temperature oxygen-deficient combustion method. The method is a process of placing solid fuel in a solid fuel high-temperature oxygen-deficient combustion device for combustion; a grate-fired fire grate and a hearth high-temperature oxygen supplementing pipe are arranged in a hearth of the high-temperature oxygen-deficient combustion device; the lower partof the hearth communicates with the lower part of a gas combustion chamber through a combustor; the combustor is connected with the oxygen supplementing pipe; the high-temperature oxygen-deficient combustion device is divided into three combustion areas; the first combustion area is in upper and lower areas of the grate-fired fire grate; the second combustion area is in an area between the lower surface of the grate-fired fire grate and the combustor; the third combustion area is in the combustor and the gas combustion chamber; the oxygen supply quantity is adjusted to enable the solid fuel tobe in semi-gasification combustion in the first combustion area; combustible matters not fully combusted are continuously combusted in the second combustion area; generated combustible mixed gas is fully combusted in the third combustion area; and the combustion process is in a negative-pressure state for oxygen supply combustion step by step in different areas, so that the combustion under low-oxygen-content condition is realized, the generation of nitrogen oxides is reduced, the fuel is fully combusted, and the combustion efficiency is high.

Description

technical field [0001] The invention relates to the technical field of solid fuel combustion, in particular to a method and device for solid fuel high-temperature lean oxygen combustion. Background technique [0002] With the development of the world's industrial economy, the rapid increase of population, the unlimited rise of human desires and the unrestrained production and lifestyle, the world's climate is facing more and more serious problems, and the emission of carbon / nitrogen oxides is increasing. The earth's ozone layer We are suffering from an unprecedented crisis, and global catastrophic climate changes have occurred repeatedly, which have seriously endangered the living environment and health of human beings. Even the high-speed growth or expansion of GDP that human beings were once proud of has been greatly reduced due to environmental pollution and climate change (and therefore, countries have called for the development model and statistical method of "green GDP...

AI Technical Summary

Problems solved by technology

[0005] However, in the process of direct combustion of solid fuel in the existing solid combustion device, the solid fuel adopts layer combustion, normal combustion, and oxygen-enriched combustion methods, which has insufficient fuel combustion, low heat conversion efficiency, and uneven temperature field , It is easy to cause problems such as excessive atmospheric emissions such as nitrogen oxides

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