Numerical Simulation of Secondary Air Distribution Optimization for a 700t/d Waste Incinerator
In order to reveal the influence of secondary air distribution of waste incinerator on the combustion process of waste in the furnace,for a waste incinerator-waste heat boiler with a daily capacity of 700 t/d in Zhengzhou city,the method of coupling computational fluid dynam-ics software Fluent and FLIC was used to study the combustion characteristics of waste in the furnace under different forms of secondary air ar-rangement and wind distribution velocity,and the temperature field and the mass fraction distribution of each gas were calculated for the fur-nace under nine working conditions respectively.The temperature field in the furnace and the mass fraction distribution of each gas were calcu-lated under nine working conditions.The results show that the region with the largest turbulence energy is mainly concentrated in the throat of the incinerator.In the case of increasing the upper secondary air velocity,the flames in the chamber are biased toward the right water-cooled wall,which is easy to cause corrosion of the right water-cooled wall;in the case of increasing the lower secondary air velocity,the temperature distribution in the chamber is uniform,and the phenomenon of the flame adhering to the wall is alleviated;in the case of arranging the second-ary winds in parallel and increasing the upper secondary air velocity,the average concentration of NO in the outlet of the chamber is the low-est,and it is 328.84 mg/m3.
air distribution optimizationwaste incinerationsecondary airnumerical simulation
万方数据
维普
