Classified air distribution device and air distribution and slag removal method for high temperature and low NOx combustion of pulverized coal

Abstract

The invention provides a staged air distribution device for realizing high-temperature low-NOx combustion of pulverized coal. The staged air distribution device comprises a combustion device, an air chamber system, air inlet pipes and a visible slag removal device, wherein the multiple air inlet pipes are arranged on the side wall of the combustion device, the air chamber system is communicated with the inside of the combustion device through the air inlet pipes; the visible slag removal device is arranged at the position where the internal light of the combustion device can be observed through the air inlet pipes and communicated with the inside and the outside of the air chamber system. The invention also provides a corresponding air distribution method and a corresponding slag removal method. According to the invention, the air staging is reasonably realized, the generation of NOx is reduced to the greatest extent, the combustion of pulverized coal is enhanced and the combustion rate of pulverized coal is increased, meanwhile the problem of slagging at the air port of traditional cyclone furnaces is solved; the visible slag removal device has air intake, visualization and slag removal functions.

Description

technical field [0001] The invention belongs to the technical field of clean combustion of pulverized coal, in particular to high temperature and low NO of pulverized coal X Combustion graded air distribution device and method for air distribution and slag removal. Background technique [0002] In recent years, with the continuous development of industrial production, NO X Emissions are also increasing, especially NO from coal burning X , thus causing serious harm to the ecological environment and human health. In order to reduce NO X Generally, two methods of combustion process control and post-combustion control are used for the generation of combustion, and combustion process control is the most economical method. [0003] At present, combustion methods such as fuel staging and air staging are usually used for coal combustion. The basic principle of air staging combustion is to carry out the combustion process in stages. Then the remaining air required for pulverized...

AI Technical Summary

Problems solved by technology

[0011] In view of the defects in the existing technology, in order to reasonably realize air classification and minimize NO X The generation of pulverized coal can be enhanced, the combustion rate of pulverized coal can be improved, and at the same time, problems such as slagging at the tuyere of the traditional cyclone furnace can be solved. The present invention proposes a pulverized coal high-temperature low-NO X Combustion graded air distribution device and air distribution and slag removal method, the visible slag removal device of the air distribution device has three functions of air intake, visualization and slag removal

Images