半干法烟气脱硫中SO2排放控制研究

以某135MW机组循环半干法脱硫系统的SO2控制为例，分析了循环半干法烟气脱硫系统中SO2排放控制问题，提出了一种基于前馈加反馈的SO2排放控制方案。     

火电厂干法脱硫灰再利用的研究

随着干法脱硫技术的推广,其副产物脱硫灰的综合利用成为亟待解决的问题。介绍了干法脱硫副产物脱硫灰的利用现状,根据脱硫灰的性质对各种利用方式存在问题进行了分析探讨。     

半干法脱硫技术在220MW机组脱硫改造中的应用

介绍了半干法脱硫技术在国电靖远电厂220MW机组脱硫升级改造项目中的应用,分析了脱硫改造选型的依据和过程,探讨了半干法脱硫设备的结构、特点及优势,为同类脱硫改造提供了参考。     

烟气脱硫副产物资源化利用现状与发展方向

简述了我国燃煤电厂湿法、半干法烟气脱硫副产物——脱硫石膏、脱硫灰渣的利用现状，针对利用过程中所遇到的问题，提出了烟气脱硫副产物资源化利用的新技术方向，并对新技术的可行性进行了论证。     

半干法烟气脱硫袋式除尘器设计初探

介绍了半干法烟气脱硫工艺及脱硫后烟尘的特点,针对半干法脱硫后烟尘的特点,袋式除尘器设计时采取了一系列的技术措施,从而保证了脱硫系统的正常运行。     

循环半干法烟气脱硫装置脱硫效率的回归分析

以循环半干法烟气脱硫机理为基础，推导了脱硫效率的表达式。对主要影响因素与脱硫效率的关系进行了回归分析，建立了数学模型，为循环半干法脱硫装置的设计、运行和脱硫效率的预测提供依据。     

半干法脱硫配套电除尘器选型分析

某新建135MW机组锅炉为循环化床锅炉,其烟气处理系统采用半干法脱硫工艺加电除尘器。由于半干法脱硫后电除尘器入口的粉尘浓度非常高,且烟尘理化性质发生较大变化,除尘难度大,常规电除尘器的选型很难适应。分析了半干法脱硫后电除尘器选型的影响因素及各系数取值。     

钙法烟气脱硫技术研究进展

综述了湿法、干法与半干法3种钙法烟气脱硫技术的主要特点、脱硫机理及主要影响因素。对3种方法在脱硫过程中出现的问题进行了分析并提出了相应的对策。     

循环半干法工艺在高硫煤脱硫中的应用分析

通过对荆门热电厂4号炉循环半干法脱硫的试验分析,讨论了Ca/S、脱硫操作温度对脱硫效率及电除尘器出口粉尘排放浓度的影响,为循环半干法工艺在高硫煤脱硫中的实际应用提供参考.     

几种半干法脱硫工艺机理探讨

通过循环半干法、烟道流化床、炉内喷钙炉后增湿活化、喷雾半干法等脱硫工艺的工程应用，就反应时间、操作温度、钙硫化、可靠性、燃料适应性、装置占地、性价比等进行了综合分析比较，并对4种半干法工艺的脱硫机理进行了探讨。     

脱硫石膏液相法生产高强度α-石膏的工艺研究

脱硫石膏是火电厂烟气脱硫副产物,由于其粒径较细、颗粒分配不均,煅烧生产比天然石膏困难,而液相法工艺适合脱硫石膏生产高强度α-石膏。对脱硫石膏液相法生产高强度α-石膏的工艺参数进行了研究,通过对反应转晶剂添加量、转化温度、压力及反应时间等参数调整,得到了脱硫石膏生产的合理参数。     

石灰石/石灰-石膏湿法脱硫几种反应塔的比较

石灰石／石灰－石膏湿法烟气脱硫是控制二氧化硫排放的最常用方法。通过对该方法几种主要工艺及反应塔的比较,研究了喷淋塔,格栅塔,鼓泡塔和液柱塔在结构与工艺上的差异,以及它们在中国的实际应用,分析了各种脱硫反应塔的优缺点,并由此归纳出脱硫反应塔发展的趋势,研究结果将为脱硫工艺以及脱硫塔的选择提供依据和参考。     

半干法脱硫工艺的影响因素分析

介绍了半干法LIFAC脱硫工艺的特点及在浙江钱清发电有限责任公司的实际应用情况。通过对该工艺实际运行状况的分析和提高脱硫效率的试验，提出了将炉前喷射改为四角切圆喷射技术，从而达到较稳定的运行状态，并提高脱硫效率。半干法脱硫工艺具有投资少，占地面积小的优点，运行5年多采，已累计削减SO2 20396t，取得了良好的社会效益。     

Effect of organic residues addition on the technological properties of clay bricks

The objective of this study is to investigate the utilization potential of several organic residues in clay bricks. Sawdust, tobacco residues, and grass are widespread by-products of industrial and agricultural processes in Turkey. These residue materials have long cellulose fibres. Sawdust and tobacco residues generally are used as fuel, and the grass is utilized for agricultural purposes. The insulation capacity of brick increases with the increasing porosity of the clay body. Combustible, organic types of pore-forming additives are most frequently used for this purpose. For this reason, increasing amounts of organic residues (0%, 2.5%, 5% and 10% in wt.) were mixed with raw brick-clay. All samples were fired at 900 degrees C. Effects on shaping, plasticity, density, and mechanical properties were investigated. The organic residue additions were found to be effective for pore-forming in the clay body with the clay maintaining acceptable mechanical properties. It was observed that the fibrous nature of the residues did not create extrusion problems. However, higher residue addition required a higher water content to ensure the right plasticity. As a result, sawdust, tobacco residues, and grass can be utilized in an environmentally safe way as organic pore-forming agents in brick-clay.     

湿法烟气脱硫石膏制备硫酸铵

采用湿法烟气脱硫石膏为原料,与( NH4)2CO3反应,制备(NH4)2SO4.通过X射线衍射仪表征可知:脱硫石膏的主要成分为CaSO4,反应后CaSO4中的Ca2+大部分以CaCO3形式存在于固体沉淀物中,CaCO3粉末平均粒径为80 nm;而原先CaSO4中的不溶性SO2-4则与NH+4结合生成(NH4)2SO4,...     

Influence of flue-gas desulfurization systems on coal combustion by-product quality at kentucky power stations burning high-sulfur coal

Two Kentucky power plants burning similar blends of high-sulfur western Kentucky and southern Indiana coal provide a unique opportunity to examine the variations in coal combustion by-products due to differences in the method of wet flue-gas desulfurization (FGD). One plant employed carbide lime-based scrubbing for two units and a dual-alkali process for the third unit. The second plant employed a Mississippian limestone from Kentucky for all four units. This study provides an example of optical and SEM petrographic techniques, supplemented by chemical analyses, applied to the study of, at least from the geologic perspective, non-traditional materials. The coal sources comprise a blend of high volatile C and B bituminous, high vitrinite (85–90%, mmf), high-sulfur (> 3%, dry) coals. The fly ash is dominated by glassy phases (70–80%) with about 5–10% spinel (predominately magnetite), 3–10% quartz, and 4–10% isotropic coke comprising the remaining portion of the ash. SEM observations indicate that the glassy particles exhibit a bimodal size distribution with sub-micron glass spheres and a population of larger (several 10s of microns) spheres. The bottom ash has higher proportions of spinels and mullite, with negligible carbon forms, compared to the fly ash from the same units. Fly ashes were observed to be lower in Fe and higher in Al, Si, and S compared to the bottom ashes. Carbide lime, a by-product of acetylene manufacture, soda ash, and limestone were the reagents used in the flue-gas desulfurization processes. The primary FGD by-product is a calcium sulfite slurry which is vacuum filtered and mixed with fly ash and, usually, lime, to form a stable product for disposal. The FGD by-products have some potential, as yet unrealized, for utilization.