Low-NOX air-coal-powder optimized burner group

Abstract

The invention provides a low-NOX air-coal-powder optimized burner group. Burners are arranged at four corners of a hearth. A secondary air I nozzle, a micro-oil ignition primary air nozzle I, an offset secondary air nozzle, an oil air chamber, a concentrated primary air nozzle, a secondary air I nozzle, an oil air chamber, a concentrated primary air nozzle, a secondary air I nozzle, an offset secondary air nozzle, a light primary air nozzle, a secondary air I nozzle, an oil air chamber, a light primary air nozzle, a secondary air I nozzle and an above-fire air nozzle are distributed in layered mode in the height direction from the bottom to the top. A primary air anti-tangential circle and a secondary air I tangential circle are arranged on the same layer, the diameter of the secondary air I tangential circle is larger than that of the primary air anti-tangential circle, and offset secondary air is closer to a water cooling wall compared with secondary air I. The low-NOX air-coal-powder optimized burner group has the advantage of being low in NOX emission, preventing slag-bonding in the hearth, preventing the hearth from being corroded at high temperature, and effectively protecting the water cooling wall.

Description

technical field [0001] The invention relates to a burner group of a pulverized coal boiler, in particular to a low NO X Air powder optimized burner group. Background technique [0002] In the combustion process of fuel, the generation of nitrogen oxides is part of the combustion reaction, and the nitrogen oxides generated by combustion are mainly NO and NO 2 etc., collectively referred to as NO X . Atmospheric NO X After dissolving in water, it will become nitric acid rain. Acid rain will cause extensive harm to the environment and cause huge economic losses, such as: corroding buildings and industrial equipment; destroying open-air cultural relics; damaging plant leaves, resulting in forest death; The fish and shrimps in the lake die; the soil composition is destroyed, and the crops are reduced or even die. Drinking the groundwater caused by acidification is also harmful to the human body. The damage of nitric acid rain to trees and crops under the same acid concentr...

AI Technical Summary

Problems solved by technology

At present, there are problems such as high NOX emissions during combustion of power plant boilers, easy slagging and corrosion of water walls, and single domestic low NOX combustion technology.

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