共查询到18条相似文献,搜索用时 109 毫秒
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详细介绍了轴流风机风量控制的形式及原理,分析了生产中风机风量理论计算值与转炉实际产生烟气量相差较大的原因,并提出了解决办法,通过对风机风量控制模型参数的优化,降低了风机的能耗,避免了配水量失真,粉尘湿度大等问题,为干法除尘系统的稳定运行打下了坚实的基础。 相似文献
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宝钢分公司6#转炉干法烟气除尘系统运行分析 总被引:1,自引:0,他引:1
介绍宝钢分公司6#转炉干法烟气除尘系统(DDS)的基本设备情况和设计参数.6#转炉的干法烟气除尘系统在4#,5#转炉使用的基础上做了一些改进,如增大除氧水箱的容量和除氧能力,提高静电除尘系统中电场功率等等.为保证6#转炉干法烟气除尘系统的稳定运行,达到良好的除尘效果,分析了热负荷试车中的问题,并结合4#,5#转炉烟气净化系统的运行情况,指出了干法烟气除尘系统运行、维护的重点,提出相应的建议及优化措施. 相似文献
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针对钢铁厂转炉一次烟气含尘浓度高、颗粒物细的特点,提出一种声波耦合旋流除尘新技术,用于降低转炉一次烟气细颗粒物浓度。采用单因素试验和响应面法研究了声压级、声频率、停留时间及烟气进气方式对颗粒物浓度降低率的影响。单因素试验结果表明,转炉一次烟气颗粒物团聚效率随声压级升高而增大,但存在最佳团聚频率。相比单一声波团聚,声波耦合旋流除尘技术对细颗粒物有很好的团聚效果。响应面法优化试验得出,当声压级为140 dB、声频率为1 400 Hz、停留时间为8 s时,采用旋流进气方式颗粒物浓度降低率最高,达33%。研究结果为提高转炉一次烟气中细颗粒物的去除效率及工艺开发提供参考。 相似文献
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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。 相似文献
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国内转炉煤气回收利用技术的现状及发展 总被引:8,自引:0,他引:8
从烟气冷却及净化系统、引风机及切换、放散系统、转炉煤气贮存及输配系统等方面论述了我国炼钢转炉煤气净化回收、储存及利用技术的现状和发展趋势。 相似文献
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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。 相似文献
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针对济钢能源动力厂使用的AI180-11型煤气鼓风机频繁粘灰和结垢、对生产造成诸多影响的问题,系统地分析了转炉风机积灰的原因。通过采用向煤气鼓风机内喷加积灰分散剂除垢、防垢的方法,可使转炉风机的检修周期延长,减轻检修人员的劳动强度,降低设备运行成本。 相似文献
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《Baosteel Technical Research》2010,(Z1):133
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. 相似文献
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本文介绍了完美无谐波变频装置的工作原理及在风机上的技术应用,提出了变频装置保护配置和冷却系统的要领,验证了风机变频调速是冶炼企业有效的节能措施。 相似文献