转炉煤气回收系统优化改进

本文介绍某转炉厂煤气回收系统的优化措施,依托转炉煤气干法除尘设备调控功能,优化操作,不仅提高转炉煤气回收量,有效降低炼钢工序生产成本,解决了干法除尘与转炉冶炼工艺的相互配合及转炉炉口外溢烟气问题,极大降低钢厂污染物排放总量,实现清洁生产。     

转炉干法除尘灰在半钢冶炼中的回收利用

论述了转炉煤气干法除尘灰的产生及理化性质,并介绍了转炉干法除尘灰回收利用的工艺流程及应用实践情况。实践表明,采用炼钢干法除尘灰,配加少量锰矿和石英砂以及黏结剂制备的XG型复合造渣剂,作为转炉造渣剂用于炼钢;采用炼钢干法除尘灰,配加筛焦除尘灰以及黏结剂制备的铁碳复合球团用于炼钢,具有可观的经济效益、社会效益和环境效益。     

150 t转炉汽化冷却烟道的研究及应用

论述了转炉干法除尘系统及其汽化冷却烟道结构,结合150 t转炉干法除尘系统的应用,介绍了适应性的设计和实际效果。转炉干法除尘系统的应用,消除炼钢污泥及污泥运输的二次污染,大幅度提高了能源的利用效率和各种副产煤气的回收利用。     

干法除尘工艺在200 t半钢炼钢转炉上的应用

 针对攀钢集团西昌钢钒有限公司200 t半钢炼钢转炉采用干法除尘工艺时出现的泄爆率高、煤气回收量低、除尘效果差等问题,结合半钢炼钢生产实际,对干法除尘泄爆原理及其在半钢炼钢转炉应用的难点进行分析,在此基础上对转炉风机转速、供氧制度、造渣加料制度及氧枪枪位制度等工艺参数进行改进。改进后的应用效果表明,200 t半钢炼钢转炉泄爆率由7.60%降低到0.08%,煤气回收量由54.6 提高到123.6 m3/t ,除尘灰回收量显著增加;同时,转炉冶炼周期缩短4 min,氧耗降低2.4 m3/t,除尘效果更好,保证了转炉冶炼的顺行,大大降低了炼钢能耗。     

转炉干法除尘煤气回收自动控制系统的应用和分析

介绍了菜钢120 t转炉干法除尘煤气净化回收自动控制系统的应用,详细叙述了莱钢120 t转炉干法除尘系统煤气回收的自动控制过程,并对影响煤气回收的几个因素进行了分析。     

半钢炼钢干法除尘系统煤气回收应用

本文针对攀钢半钢炼钢条件下的干法除尘系统进行煤气回收的实践和应用。通过规范转炉冶炼操作和干法除尘主控操作,对装入制度、加料制度、造渣制度、控制系统等进行了调整和优化,成功地在干法除尘上进行煤气回收,达到了国内先进水平。     

210t转炉干法除尘煤气净化回收分析

包钢薄板厂210t转炉一次除尘改造为干法除尘后,转炉煤气质量和煤气回收量相对于湿法除尘均有了明显的改善,介绍了干法除尘煤气回收系统的可靠性和安全性。     

半钢炼钢转炉干法除尘工艺控制技术

针对西昌钢钒转炉干法除尘系统,在分析转炉干法除尘系统泄爆机理的基础上,通过转炉干法除尘系统装料制度控制、氧枪操作制度控制、造渣制度控制、联锁控制条件优化控制及干法除尘系统EC水量、温度控制等系列控制技术的开发应用,实现了转炉干法除尘零泄爆。系统放散烟气含尘量降到6.2mg/Nm3(4mg/Nm3~11mg/Nm3),煤气回收量提高到129Nm3/t钢,蒸汽回收量105kg/t钢,系统节约电耗为3.01kW/t钢,节约循环水消耗2.46t/t钢,净煤气含尘浓度<10mg/Nm3(0.1mg/Nm3~1.0mg/Nm3),炼钢除尘灰量16.4kg/t钢等技术经济指标,解决了除尘系统水污染问题,实现了烟气的无污染排放,具有显著的经济效益和社会效益。     

转炉煤气除尘技术比较和新干法除尘技术探析

转炉煤气是高温高含尘烟气,不论湿法除尘还是干法除尘都要对其直接喷水降温,消耗大量冷却水,同时转炉煤气900℃以下显热能也白白浪费。介绍了现有转炉煤气除尘技术,包括湿法、干法以及半干法除尘技术,比较各自能量消耗。提出转炉煤气新干法除尘技术,该技术能显著减少系统冷却水消耗,并提高系统蒸汽回收量。     

半导体激光气体分析仪在转炉煤气回收中的应用

分析了石钢公司转炉炼钢厂煤气磁氧分析仪故障频发的原因是设备老化问题。提出采用半导体激光分析仪,利用激光能量被气体分子“选频”吸收形成吸收光谱的原理,测量被测气体浓度,判断煤气回收条件,指导炼钢生产。项目运行半年来,分析仪未出现故障,煤气回收时间较改造前延长了40S,提高了煤气回收量,经济效益可观,同时减轻了维护、检修劳动强度。     

激光氧气浓度分析仪用于电除尘安全监控系统

针对转炉煤气柜后、电除尘装置前氧气浓度分析的重要性和目前分析系统的不足,介绍了半导体激光吸收光谱的技术原理和激光氧气浓度分析仪的性能特点和基本结构,给出了仪器现场应用的结果,证实了该仪器能很好地满足电除尘前氧气浓度监测的需要。     

120t转炉煤气干法除尘控制系统

针对莱钢120t转炉煤气干法除尘系统，简要介绍了其控制系统的硬件配置，详细阐述了蒸发冷却器喷水预设定控制、出口温度自学习控制、静电除尘器电场自记忆控制、转炉烟罩微差压阻尼控制、输灰系统双摆阀逻辑控制、引风机吸气自选择控制、切换站压力无扰动切换控制等功能。     

Latest developments for dry and wet dedusting systems for converter steel making

Environmental requirements world wide and in the P.R.of China in particular have increased and authorities are increasing the pressure on steelmakers to comply with always more stringent limits and standards. Modern converter steel making goes along with the innovation and new developments not only for the primary converter process itself but even more for the dedusting technologies.This paper describes the benefits and latest development of advanced off gas cleaning and recovery systems based on dry type cleaning with electrostatic precipitation and wet type gas cleaning based on wet scrubbers.Modern converter dedusting is based on suppressed combustion systems in order to reduce off gas amounts and to be able to use the gas for gas recovery.The dry type primary off gas treatment system based on electrostatic precipitator technology is the most advanced environmental solution available for converter steel making.Dry dedusting has been introduced in China successfully with a significant contribution by Siemens VAI being the market leader for converter dry dedusting systems.Siemens VAI has introduced several design improvements over the last years such as CFD modeling of flow conditions in evaporation cooler,design of chains for dust conveyors,design of ESP inlet,design and thickness of discharge electrodes and operation in energy saving mode.Additionally the DDS process has been successfully implemented in China for the De-P process.The gas recovery system for DDS has been optimized over the years with high quality equipment and integrated automation and control systems.Wet type dedusting for converter gas is a well proven technology for many years and is still widely used due to the simplicity of the process and the lower investment costs.SVAI has continuously improved it’s wet dedusting technologies to provide highly energy efficient systems which can achieve lowest levels of clean gas dust while still maintaining a moderate water and energy consumption with simplified process control and standardized process control packages.Main design and process improvements include expansion joints for connection of scrubber to cooling stack,new type of droplet separator,advanced hood pressure control package,ID fan washing system,ID fan speed control system etc.The focus for wet type gas recovery systems is still on maximum safety and reliability.SVAI has also successfully improved the technological packages for converter gas recovery for wet type dedusting systems.The comparison between the two system shows the advantages of dry dedusting mainly being the lowest clean gas dust content, lower operating costs,easier handling for recycling of residuals and no need for a water treatment plants.Wet type dedusting has it’s main advantages in the simple process and operation of the system,the flexible layout solutions inside the steel shop as well as generally lower investment costs.An overview on the numerous reference installations for dry- and wet type dedusting systems in China as well as world wide is given.     

转炉煤气干法除尘技术

简要介绍了国内外转炉煤气干法除尘技术及应用情况,重点介绍了系统运行中出现的问题及采取的控制措施。通过采取优化转炉吹炼操作及配置静电除尘器,保证蒸发冷却器喷嘴雾化效果,开发应用粉尘冷压块等工艺降低了回收成本,干法除尘系统运行稳定。国内外钢铁企业运行结果表明,采用干法除尘后,回收煤气含尘量可以控制在10mg/m3以下,与湿法除尘技术指标对比,干法除尘具有能耗低、投资回收期短等优点。     

转炉炼钢干法除尘系统泄爆率影响因素研究

转炉炼钢采用干法除尘是一种发展趋势.分析了转炉炼钢干法除尘系统泄爆产生的条件、原因.结合宣钢150 t转炉的实践,提出了吹炼前期合理控制枪位和供氧强度,密切关注EP内气体含量;二次下枪前延缓CO生成速度,避开泄爆点,二次下枪后严格执行相应吹炼模块;提前预知入炉原料成分和成色,避免前期泄爆等防泄爆措施,对转炉炼钢干法除尘安全使用提供了较好借鉴.     

张钢炼钢厂方坯连铸机水口结瘤研究及控制措施

通过对钢水夹杂物的分析,改善精炼过程中各环节的控制,初步解决了LF炉冶炼一些普通产品的结瘤问题。     

天铁热轧2×180t转炉干法除尘系统工艺技术改造

针对天铁热轧2×180t转炉干法除尘系统的除氧器加热、煤气冷却器供水、输灰机运行和静电除尘器轴瓦等所存在的问题进行技术改造。改造后,使蒸汽使用量、耗电量、耗水量明显减少,备品备件的消耗费用也相应降低,并确保了干法除尘系统的运行更加安全稳定。     

转炉煤气lt干法除尘水处理设施设计

近年来,转炉煤气LT干法除尘工艺得到了大力的推广。但LT干法除尘实际也须配套建设水处理设施。对转炉煤气LT干法除尘水处理设施设计方法进行了介绍,可作为相似工程中设计的借鉴和参考。     

高炉干式除尘喷水（碱液）降温系统

针对高炉煤气全干法除尘系统酸性气体含量高,容易造成煤气管网及其附属设备严重腐蚀的问题,首钢京唐公司采用了喷水（碱液）中和、降温方法,并加强管道保温和管道设备内的防腐等措施,对减少腐蚀取得了良好效果。     

激光原位气体分析仪在高炉过程控制中的应用

介绍了高炉炼铁过程中气体分析的重要性及传统采样方式气体分析系统的不足，阐述了激光原位气体分析仪的技术原理、性能优势和仪器结构。激光原位气体分析仪在高炉炼铁过程中的成功应用，表明了该仪器很好地满足了高炉炼铁过程气体检测的需要。