CAJ | 학술논문

将炭粉与空气按比例预混后在栽流气体发生器中燃烧生成N~2+CO_2混合气体是经济制备镁熔体气体保护用栽流气体的一种新方法.对发生器中连续进行的空气-炭粉两相流燃烧进行了数值仿真分析,并采用正交方法对反应器直径、反应器高度、炭粉粒度和空气过剩系数这4个主要参数进行了优化,结果表明,当炭粉粒度为100～250μm、反应器高度为1000mm、反应器直径为200mm、空气过剩系数为1.05时,燃烧反应程度最理想.
장탄분여공기안비례예혼후재재류기체발생기중연소생성N~2+CO_2혼합기체시경제제비미용체기체보호용재류기체적일충신방법.대발생기중련속진행적공기-탄분량상류연소진행료수치방진분석,병채용정교방법대반응기직경、반응기고도、탄분립도화공기과잉계수저4개주요삼수진행료우화,결과표명,당탄분립도위100～250μm、반응기고도위1000mm、반응기직경위200mm、공기과잉계수위1.05시,연소반응정도최이상.
It is a novel economic technology to produce carrying gas of N_2 and CO_2 for protecting Mg melt by combusting premixed air and pulverized coke in a gas generator. The combustion of air-pulverized coke two-phase flow in the gas generator is numerically simulated in this paper. Moreover, the main parameters are optimized by orthogonal method. The results show that the combustion is optimal when the parameters are as follows: Diameter of reactor 200mm, height of reactor 1000mm, size of pulverized coke 100～250μm and coefficient of excess air 1. 05.