煤粉和矿粉复合喷吹时高炉风口回旋区数学模型

在气粉两相流运动方程基础上，联立气体循环流模型和煤粉，矿粉、焦炭和气相燃烧等反应的动力学方程及各相之间的传热方程，建立了高炉风口回旋区的一维数学模型。并对几个实际过程进行了模拟仿真计算，验证了备单元过程模型的适应性，并确定了模型参数。     

考虑燃烧反应的干熄炉内一维传热模拟

建立了干熄炉内焦炭层床、循环气体的传热模型，并耦合燃烧反应计算，分析了干熄炉冷却室内的温度变化，计算结果与实测数据基本一致。还进一步分析了化学反应活化能和风料比对于熄炉内传热的影响，以期为干熄炉的优化设计提供参考。     

煤的顺流层状燃烧过程的研究

介绍了煤层顺流燃烧的特点，以及将煤筛分后分级燃烧对层状燃烧过程的影响。从试验中得到在层状燃烧过程中，煤层内温度，通风阻力，废气中氧含量的变化规律，以及煤的粒度，水分和燃烧扩展速度之间的关系。     

循环流化床导热油炉的循环系统研究

分析了循环流化床导热油炉的煤颗粒燃烧闭路循环系统,讨论了固体颗粒循环流动特性和煤颗粒在循环回路中的循环燃烧过程,研究了循环流化床导热油炉的导热油循环供热系统,并且对注入式流程和抽吸式流程、单一用热设备与多个用热设备的工艺流程、一次循环系统或二次循环系统、气相加热方式及液相强制循环供热方式进行了讨论分析,总结了循环流化床导热油炉的设计方法与计算步骤。     

COREX熔融气化炉热模拟研究

以不同配矿，配煤方案和鼓风条件，研究了熔融气化炉熔炼过程产生的煤炭汉化床，海绵铁金属化率，煤质，炉渣碱度和成分，下料速度，燃烧强度，炉缸热量等对冶炼过程和铁水质量的影响。     

煤不稳态顺流式怪状燃烧数学模型的建立

介绍了一维不稳态煤的顺流式层状燃烧数学模型的建立过程，利用该模型可进行煤的顺流式层状燃烧特性及其影响因素的研究。     

喷吹炭化煤与铁矿粉混合物时炭化煤的燃烧

用实验室规模的试验装置和数学模型对带氧气套管的喷嘴喷吹粉状炭化煤和铁矿物的混合燃烧和熔化现象进行了研究。在炭化煤粒喷入后，观测到铁矿粉在燃烧室内被熔化和凝聚。试验表明，熔化的铁矿粉已被凝聚过程中的固体碳所还原。通过适当形式的奈维－斯托克方程和煤燃烧动力学，对流体流动、传热和炭化煤的燃烧行为已经数学模型化。对图示流线及燃烧室内局部温度及煤气成分的分布做了计算。     

充填床液泛规律及氧煤炼铁极限的探讨

描述了充填床内气，液两相逆向流的实验过程，得到模型实验的规律，并以此分析了高炉氧煤强化炼铁的优化条件，当采用固定风量操作时，理论极限为１５％富氧率，喷煤量３２０ｋｇ／ｔ铁；采用维持炉缸煤气量不变的操作手段时，理论极限为２０％富氧率，喷煤量３７０ｋｇ／ｔ铁。     

CFB锅炉结焦分析与预防

本文就韶关钢铁集团热电厂循环流化床锅炉出现的结焦问题，进行了原因分析：一是床料对结焦的影响。二是灰熔点对结焦的影响，三是燃料特性对结焦的影响，四是密相区的燃烧份额对结焦的影响。从而对结焦提出了十一种处理方法和预防措施。在实践应用中取得了良好的效果，为热电厂带来了经营效益，在同类型循环流化床锅炉运行中有很好的借鉴作用。     

高炉中焦碳循环运动对燃烧过程的影响及高炉内造渣过程中炉料相成分的变化

本部报告包括两部分即: 一、高炉中焦碳循环运动对燃烧过程的影响。二、高炉内造渣过程中炉料“相成分”的交化。关于焦碳的循环运动对高炉内焦碳燃烧过程的影呐以及炉料相成分的变化的研究工作是在不久以前才开始的,并且现在还在继续进行,这里谈的只是初步的材料,尚未作出最后结论。对高炉冶炼过程的研究,特别在炉缸内进行的研     

CFB锅炉结焦分析与预防

就热电厂循环流化床锅炉出现的结焦问题,进行了原因分析．一是床料对结焦的影响;二是灰熔点对结焦的影响;三是燃料特性对结焦的影响;四是密相区的燃烧份额对结焦的影响．从而对结焦提出了十一种处理方法和预防措施．     

Coal gasification in a system with a damped circulating fluidized bed

Experiments are conducted on the steam gasification of Borodino coal in a two-chamber gas generator. The generator is based on a circulating fluidized bed with damping of gas motion by the packing. The mean size of the coal particles is 0.2 mm. Heat from the combustion chamber is sent to the gasification chamber by the circulation of a disperse powder (electrocorundum) between the chambers. The chambers are filled with spherical packing (diameter 50 mm, porosity 0.5). The size of the electrocorundum particles is 0.3 mm. The heat of combustion of the gasification products is 8195 kJ/m³. The unburned residue is 5% in chemical terms and 2% in mechanical terms. The model proposed for the gas generator consists of one heat-balance equation each for the combustion and gasification chambers. The model is consistent with the experimental data. On the basis of the model, the optimal generator parameters are found: temperature 900°C in the gasification chamber and 1020°C in the combustion chamber; proportion of coal sent to the gasification chamber 36%; chemical efficiency 40%.     

气固流化床内锂颗粒停留时间影响因素研究

为提高锂精渣颗粒在气固流化床中的燃烧效率及延长颗粒的停留时间,基于CPFD理论详细研究了气流速度、质量流和压力等对颗粒在流化床中停留时间的影响,并分析锂精渣颗粒在流化床提升管内轴向高度颗粒浓度的分布情况。结果表明,在质量流一定的情况下可以通过增加气流速度来提高颗粒的停留时间;在相同气流速度下可以通过降低质量流来提高颗粒停留时间;进气压力对颗粒的停留时间影响很小;通过提高气流速度可以显著提高颗粒在密相区的停留时间。     

高炉下部气固湍流和煤粉燃烧的数值模拟与优化研究

高炉喷吹煤粉时,由于煤粉的不完全燃烧,在回旋区处会产生未燃煤粉,影响高炉的透气性。建立了气固两相湍流和煤粉燃烧的三维数学模型,并且验证了该模型的可靠性。用所建模型对由直吹管、风口、回旋区和焦炭床构成的高炉下部区域进行了喷吹煤粉流动与燃烧现象的模拟研究。模拟结果揭示了高炉炉内气固流动和煤粉燃烧的基本性质和特点;通过正交试验方法研究不同操作因素对评价指标煤粉燃尽率的影响,得到4个操作因素对燃尽率的影响程度依次分别为喷煤量、富氧率、鼓风量和鼓风温度。而工况(喷煤量1 25kg/t,鼓风量1 950m3/min,鼓风温度1 523K,富氧率5.0%)为最佳优化工况,可实现提高喷煤量和煤粉燃尽率的效果。     

Zinc smelting with coal as the principal heat source and reducing agent

Recent progress in fluidized bed coal combustion and gasification suggests possibilities for the substitution of coal for coke in metallurgical smelting processes. One such possibility was ex-plored in a laboratory study of zinc smelting with coal. A two-stage reactor was constructed, which gasified coal in the lower stage to produce a reducing gas mixture. In the upper stage, the reducing gas was passed through a fixed bed containing a mixture of ZnO and either coal or coke. The extent of reduction of the ZnO was measured as a function of reaction time, temperature, and gas composition. Temperature was found to be the most important variable. At temperatures of 1000 °C or higher in the fixed bed, more than 97 pct of the ZnO was reduced in a few hours. No difference was found between the uses of coal and coke in the fixed bed. An important remaining step in proving process feasibility is condensation of metallic Zn from the product gas.     

Processing Ash and Slag Wastes from Thermal Power Stations. Part 2

For existing coal-fired power plants, current methods of utilizing ash and slag waste may be considered in addressing new environmental and economic risks. However, for new power sources, environmental considerations are much more important in selecting the coal-combustion technology. Technology based on a circulating fluidized bed is sometimes cited as the most promising approach to environmentally sound coal combustion. It permits significant decrease in emissions of sulfur and nitrogen oxides beyond the boiler, but is of no help in processing ash and slag waste. For waste disposal, a different approach is recommended for new plants or the upgrading of coal-fired plants: instead of coal combustion in a gas flux or a fluidized bed, combustion in bubbling slag melt. Such methods are described. The basic characteristics of pulverized-coal combustion and combustion in slag melt are compared. Two basic approaches to the development of coal-based power generation are proposed: coal combustion with supercritical steam parameters; and gas generation with a hybrid (steam + gas) power-generating cycle based on gasification of solid fuels. The electrical efficiency of steam-based plants may be increased from 30–36 to 44–45% with supercritical steam parameters; and to 50–55% when using a hybrid steam–gas cycle. The proposed industrial system for coal gasification in slag melt increases the overall electrical efficiency. The environmental and economic efficiency of carbon gasification is demonstrated. It is simple to produce components from slag by casting. The cast slag–coal components are of considerably higher quality than analogous cement–sand components with added fly ash. The ease of switching from one type of casting to another permits rapid response to market demand.     

循环流化床锅炉炉内脱硫效率影响因素分析

介绍了煤在循环流化床锅炉燃烧过程中SO2生成机理和脱硫机理,分析了脱硫效率的影响因素,并提出了解决问题的几点建议。     

3D model study of coal/coke combustion in a blast furnace effects of coal properties

A three-dimensional mathematical model of the combustion of pulverized coal and coke has been developed.The model is applied to the blowpipe-tuyere-raceway-coke bed region in an ironmaking blast furnace in one computational domain,which includes two parts:pulverized coal combustion model in the blowpipe-tuyere-raceway cavity and the coal/coke combustion model in the surrounding coke bed.The effects of coal properties are examined comprehensively,in terms of coal burnout and gas species distributions.The ...     

Mathematical model of COREX melter gasifier: Part I. Steady-state model

The COREX melter gasifier is a countercurrent reactor to produce liquid iron. Directly reduced iron (DRI), noncoking coal, and other additives are charged to the melter gasifier at their respective temperatures, and O₂ is blown through the tuyeres. Functionally, a melter gasifier is divided into three zones: a moving bed, fluidized bed, and free board. A model has been developed for the moving bed, where the tuyere region is two-dimensional (2-D) and the rest is one-dimensional (1-D). It is based on multiphase conservation of mass, momentum, and heat. The fluidized bed has been treated as 1-D. Partial equilibrium is calculated for the free board. The calculated temperature of the hot metal, the top gas, and the chemistry of the top gas agree with the reported plant data. The model has been used to study the effects of bed height, injection of impure O₂, coal chemistry, and reactivity on the process performance.