Pulverized coal coupled combustion device and combustion method

Abstract

The invention discloses a pulverized coal coupled combustion device and a combustion method. The device comprises a gas combustion chamber, and a pulverized coal combustion chamber arranged in the gascombustion chamber; a gas flameless combustor is mounted at the top of the gas combustion chamber; gas is combusted in a flameless mode in a cavity inside the gas combustion chamber and outside the pulverized coal combustion chamber through the gas flameless combustor; a pulverized coal flameless combustor is mounted at the top of the pulverized coal combustion chamber, and penetrates through thetop of the gas combustion chamber; and pulverized coal is combusted in a flameless mode in the pulverized coal combustion chamber through the pulverized coal flameless combustor. The pulverized coalcoupled combustion device can spontaneously maintain the pulverized coal flameless combustion with an uniform temperature field, generated by the gas flameless combustion, as an uniform radiation heatsource, and can stabilize the oxidation under a low-temperature and low-oxygen atmosphere, so that the generation quantity of nitric oxides is greatly reduced, and the ultralow emission of the nitricoxides in the pulverized coal combustion is realized.

Description

technical field [0001] The invention relates to the technical field of pulverized coal combustion, in particular to a pulverized coal coupled combustion device and a combustion method. Background technique [0002] With the growth of human society's demand for energy, especially fossil energy, the constraints of energy on economic and social development and the impact on resources and the environment are becoming more and more obvious. In recent years, global air pollution has become increasingly serious, and environmental protection has become a very important topic for the development of the world today. Nitrogen oxides (NO x ) is one of the main reasons for the formation of acid rain and PM2.5, which has caused great harm to human life and health. Coal is one of the main energy sources used by the human world, and the combustion of pulverized coal produces a lot of nitrogen oxides, and the country's requirements for related emissions are becoming more and more stringent...

AI Technical Summary

Problems solved by technology

However, in this atmosphere, pulverized coal cannot carry out self-sustaining and stable combustion, which will cause problems such as incomplete combustion and low burnout, and even the reaction temperature will gradually drop and eventually lead to flameout.

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