湘钢 750 m3 高炉热风炉故障原因及解决办法

湘钢750m^3高炉3座热风炉先后存在炉壳表面温度偏高，开裂，热风短管的波纹管膨胀变形并导致热风主管移位等问题，经过采取对3座热风炉分段灌浆及对变形波纹管进行换型，并对热风炉与热风主管之间增加拉紧装置等措施后，热风炉系列故障基本解决，大大降低了休风率，提高了风温，保证了高炉生产顺利。     

直流法克劳斯过程最佳化计算的初步研究

本文针对直流法克劳斯硫磺回收反应炉、转化器关联化学平衡,物料平衡及热平衡建立了两个非线性方程组,用求导数的牛顿——拉夫森法进行数值计算,求反应炉及转化器出口组成,并计算出最佳空气配给量及最佳反应温度。对有关问题进行了讨论并附有计算实例。     

基于燃池的新型灶连炕系统的实验研究

通过对北方农村地区供暖方式的调查,在以火炕为主要供暖方式的既有农宅基础上提出了一种基于燃池的新型灶连炕系统。该新型灶连炕系统的创新点在于将小型燃池放入灶下部,利用燃池阴燃的原理改善了夜间炕面温度下降速度快的问题。针对该系统进行不同工况下的热源特性分析,并将其与传统炕在炕面温度、炕面温度标准差、炕体蓄放热特性、炕体散热能力方面进行对比分析。结果表明燃池实际阴燃燃烧过程中出现逆向阴燃,这与燃池内部空气量的多少有关;该新型系统能有效维持夜间炕面温度处于人体热舒适范围内,采用阴燃后可使炕面温度分布更加均匀,炕面所提供的散热量有78.1%满足房间热负荷,避免了人们夜间重新填料,为该系统的推广应用提供依据。     

Influence of calcium and magnesium content of coconut oil on deposit and performance of plant oil pressure stoves

The influence of calcium and magnesium content of plant oil on performance and formation of deposits in plant oil pressure stoves was the objective of this study. Refined coconut oil of pharmaceutical quality was used as base for fuel blends. Enriched oils comprising four different concentrations of calcium CC and five different concentrations of magnesium MC were prepared by adding single element organometallic standards. During burning tests, the specific fuel consumption, the required frequency of nozzle cleaning and the amount of deposits in the vaporizer were measured.Deposits DEP increased as the level of calcium in the fuel blends increased to 0.17 g/kg for the control and reached 10.08 g/kg for the test fuel CC42. The same was also valid for magnesium-enriched fuel blends. However, reduced concentrations of earth alkaline lead to a higher amount of deposits with 11.94 g/kg for MC18.For CC5, CC10 and CC26 the specific fuel consumption was in a range between 0.266 and 0.294 kg/h, with CC42, being significantly reduced to 0.207 kg/h. Test fuels enriched with magnesium showed a similar behaviour, where a reduction of the specific fuel consumption for the high magnesium contents of MC18 and MC26 was observed.     

Design and performance evaluation of biogas stove for community cooking application

Matured biogas production technology has led to the development of a number of biogas appliances for lighting, power generation, and cooking. The most promising among them is the biogas stove, to meet the energy requirement for cooking application at domestic as well as at the community level. In this paper, an attempt has been made to design and develop a community biogas stove for baking chapatti (bread) or other food items on a hotplate for canteen or community purposes. The performance of the stove was evaluated by using a 25 m³ floating type biogas plant at Asha Dham Asharm, Udaipur, India. The gas consumption rating of the developed stove was 1 m³ (19 MJ/h) and the cooking efficiency of the stove was recorded to be about 43.96%.     

太钢4350m3高炉热风炉的设计

在新建的太钢4350m^3高炉新日铁外燃式热风炉的设计中,围绕高风温长寿命采取了一系列措施：蓄热室、燃烧室、混风室内墙体与拱顶的拱角相接处,采用迷宫式结构,防止独立砌体间窜风;在开孔部位采用组合砖,以提高这些关键部位的气密性和结构稳定性;蓄热室内采用带凹凸槽的小孔径七孔高效格砖,提高加热面积;采用分离型余热回收装置预热助燃空气和煤气等。     

承钢2500 m~3高炉热风炉工艺优化

介绍了承钢2 500 m3高炉顶燃式热风炉存在的问题,分析了影响热风炉利用效率提高的原因。通过对热风炉工作制度进行优化、改进热风炉燃烧器,进一步提高了热风炉的风温和煤气利用效率,使承钢高炉生产实现了高效、节能、环保、长寿的良好循环。     

热风炉节能模拟系统的UML建模与分析

以UML技术和软件工程为理论依据,结合某钢铁厂的热风炉节能模拟系统开发实例,使用UML对该系统进行建模,给出了对此基于UML的热风炉节能模拟系统的分析.     

温度继电器温度特性自动检测系统的研究

研究设计了基于空气测定法原理,简单实用、高精度的温度继电器温度特性自动检测系统。该检测系统,是用电阻加热炉模拟温度继电器周围的环境温度,通过控制加热炉内温度的变化,从而测得温度继电器的动作温度。系统按设定的控温曲线对温场温度进行控制,并采用模糊算法,采取最小二乘法误差校准,将电阻加热炉炉丝按功率进行分组,并在试验腔的检测段放置孔板,使测试区域的温度均匀,有效提高了系统检测精度。经测试该系统测试精度满足要求,具有良好的使用效果。     

提升炊事热效率的实验研究和数值模拟

当前炊事活动中热量从燃气燃烧传至食物总热效率一般在50％左右,有较大提升余地.通过对炊事活动传热过程进行分析,可以确定影响炊事热效率的主要因素,设计制作了节能灶圈.通过使用平底锅和圆底锅对其进行实验测定并改进,最终可实现将炊事热效率提升5％～12％.同时还对一般炊事过程和使用节能灶圈的情况进行了数值模拟,验证了节能灶圈的原理.确定了高温烟气大量卷吸环境空气是造成炊事效率不高的最主要因素,使用节能灶圈可有效减少这种现象的影响.