反应器高度对气体发生器中炭粉燃烧的影响  

The Effect of Reactor Height upon Combustion of Pulverized Coke in Gas Generator

作　　者：游国强[1] 王进峰[1] 刘汉周[2] 左旭东[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]重庆大学动力工程学院,重庆400044

出　　处：《材料导报》2012年第16期141-144,148,共5页Materials Reports

基　　金：重庆市科技攻关项目(CTCS2010AA4045);广东省科技攻关项目(2010A090100033)

摘　　要：将炭粉与空气按比例预混后在发生器中燃烧生成N2+CO2混合气体是经济制备镁熔体气体保护用载流气体的一种新方法。对自行开发的管状载流气体发生器中空气-炭粉两相流燃烧进行了数值模拟,结果表明,炭粉燃烬程度(用碳浓度表示)可以近似为反应器高度的递减对数函数;总存在一个临界值H0,当反应器高度H≥H0时,炭粉燃烬,在所模拟的工况下,H0≈1000mm。It is a novel economic technology to produce carrying gas consisting of N2 and COx for protecting Mg melt from ignition by on-site combustion of premixed air and pulverized coke in a gas generator. The combustion of the two-phase flow in the self-designed tubular gas generator was studied by numerical simulation. The results showed that the carbon concentration, which reflected the combustion extent of the pulverized coke, can be approximately expressed as a monotone decreasing logarithmic function of the gas-generator height; the pulverized coke will burn off if the gas-generator heightH≥1000mm.

关 键 词：两相流 炭粉 燃烧 数值模拟 载流气体发生器 镁熔体保护 

分 类 号：TQ038[化学工程]