Thermal performance of the “Rohini”—An improved wood cookstove

A detailed thermal analysis of the “Rohini”, a new damperless, three-pot, L-shaped improved cooking stove, developed by the authors, is reported. The stove was designed for an optimum power output at a wood-burning rate of 1.0 kg/h, which is the average rating of the stove used in rural areas. The performance of this stove has been evaluated at different power outputs. The study shows that the thermal efficiency of the stove is not unduly affected by operation at burning rates lower than the design value but shows a fall at the higher burning rate of 1.5 kg/h. The rate of heat gained by the individual pots and the various heat losses, such as convection, radiation and flue gas losses, at different burning rates, are also discussed. This study shows that widespread use of this stove in India could save nearly 150 MT wood/yr.     

宣钢3#高炉保温方法的创新与应用

高炉冬季施工面临保温问题,如果保温措施不到位,将会给高炉开炉后的安全生产留下隐患。宣钢3#高炉利用高度差、温度差形成的气体流动,使空气自然吸人热风炉加热,再进入高炉进行保温,既保证了热风炉正常烧炉,又实现了高炉保温,值得同行借鉴。     

论燃烧强度对高炉冶炼的影响及高炉高产节能技术措施

推进技术创新、促进节能降耗是转变经济发展的重要途径。本文通过增加节能装置,将热风炉入炉风温由130℃提高到380℃,提高近2倍。生产1 t钙镁磷肥,可以节约标煤10.6 kg、焦炭25kg,在规模生产中取得了明显的节能降耗效果。     

八钢4号高炉热风炉修复方案

文章对八钢400m^3级4号高炉三座热风炉破损现状进行描述,并制定了修复方案,经过修复使热风炉各项技术参数恢复正常,保证高炉的正常生产。     

变频技术在热风炉的应用

热风炉鼓引风及送风机系统安装了变频器,改变了过去靠人工对热风炉的风门进行调节来满足热风炉的需风量的状况。通过采集井口混合温度到热风炉房,司炉人员可直观观测井口混合温度,通过风机电机变频调速来调节热风炉运行工况,提高了风机的工作效率,1台4.2MW的热风炉1个采暖期可节电10万kW.h,实现了安全经济运行,提高了安全可靠性     

酸性感应电炉炼钢技术

利用感应电炉熔炼周期短、热效率高、操作简单且合金烧损较少的特点,通过控制废钢种类,在6t酸性感应电炉上冶炼ZG270-500、ZG310-570等多种牌号的铸钢产品,其力学性能均超过了其相应标准要求,取得了较好的效果。     

高炉热风炉悬链线拱顶砖计算软件开发

本文介绍了高炉热风炉悬链线拱顶砖多段圆弧拟合计算新方法,用计算机语言编程计算砖的尺寸,砖的层教,每层砖的类型、数量,每层砖组合误差等,并用C#编写界面.提高热风炉拱顶砖计算精度,减少了设计计算时间,便于使用.     

铜精矿预干燥工艺中尾气指标的优化

In 2020, a call of “To build a green development model pioneer, the major pollutant emission is 50% better than the national standard”was proposed by Jiangxi Copper Guixi Smelter. The upgrading transformation of natural gas hot-blast stove to replace coal-fired hot-blast stove were completed in material preparation workshop of Guixi Smelter respectively in 2015 and 2016. After nearly 5 years of operation, the concentration of SO₂ decreased significantly compared with coal-fired hot-blast stove, the average concentration of SO₂ in the tail gas is always 50% higher than that in the National Standard (400mg/Nm³) , but the concentration of SO₂ in the tail gas still fluctuates greatly, which is not consistent with the goal of "making a green development model as a pioneer and major pollutants discharge is 50% higher than that in the national standard" . Therefore, the material preparation workshop of Guixi Smelter responded positively, through improving the burner of natural gas hot-blast stove, further optimized the tail gas emission index, strictly controlled the SO₂ concentration within 5 minutes the average value does not exceed 100mg/Nm³.