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探索了影响电解净化废液在低浓度二氧化硫烟气吸收脱硫过程中的关键因素,并摸索了最佳反应工艺条件,结果表明,烟气中二氧化硫初始浓度、吸收液pH、液气比和氧化反应时间等都对脱硫效率有明显的影响;在现场小试条件下,电解净化废液脱硫最佳工艺条件为:烟气中二氧化硫初始浓度≤4 000mg/m3、吸收液pH≥6、液气比(L/G)4.5L/m3、脱硫后液氧化时间控制10min。以该试验结论为依据,设计了以电解净化废液为主要脱硫介质,异常情况下氢氧化钠碱液进行保障吸收的双介质脱硫工艺,同时设计开发了具有双循环系统的脱硫塔并实施应用,吸收效果显著,尾气全时达标。 相似文献
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软锰矿、菱锰矿吸收烧结烟气中的SO2制取硫酸锰 总被引:1,自引:0,他引:1
现代钢铁联合企业的高炉-转炉流程是铁-煤化工过程,针对该流程中烧结工序排放含二氧化硫烟气的特点,采用软锰矿、菱锰矿脱硫制取硫酸锰.采用菱锰矿调节和控制矿浆的pH值,利用软锰矿中MnO2的氧化性和SO2的还原性,用软锰矿矿浆在填料吸收塔内进行脱硫试验.试验结果表明:二氧化硫的吸收率在95%以上,该工艺还具有湿法除尘的特性,对烟尘的吸收率达90%以上,且副产品硫酸锰的质量能达到工业级,是一种真正实现"综合治理、变废为宝"的脱硫新技术. 相似文献
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济钢400 m2烧结机选用SDA脱硫技术进行烟气脱硫,该技术系统主要包括脱硫及除尘系统,脱硫剂贮存、制浆及输送供给系统,循环灰贮存、制浆及输送供给系统,脱硫灰、除尘灰输送贮存及外排系统。应用实践证明,SDA脱硫技术运行稳定,脱硫效率高,且颗粒物排放浓度低,烟尘排放浓度小于20 mg/m3,二氧化硫和颗粒物同时达到排放标准。 相似文献
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为充分利用固废资源,降低脱硫成本,采用传统皮江法冶镁工艺中产生的金属镁渣为基质,利用实验室湿式脱硫系统,对不同镁渣粒径、烟气气体流速、二氧化硫浓度、固液质量比(简称固液比)以及氧气含量条件下的脱硫性能进行了研究。结果表明,样品粒径越小,流速越慢,二氧化硫流速越低,固液比越低,脱硫量越高;反之,则脱硫量越小。在粒径0.106 mm、烟气流速340 mL/min、二氧化硫流速10 mL/min、固液比0.1 g/g、饱和脱硫时间1 575 min的条件下,二氧化硫吸附量为1 354.62 mg/g。 相似文献
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叶乐饶 《有色冶金设计与研究》2013,(6):44-45
采用除尘脱硫塔对烟气进行脱硫除尘,吸收用碱液pH控制在8~9,此时S02去除率为90%以上,处理后烟气可以达到《锅炉大气污染物排放标准》GB13271-2001中的Ⅱ时段二类区排放标准。该工艺适合小型烟气处理,能有效地控制二氧化硫烟气对大气的污染。 相似文献
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某冶炼厂采用回转窑回收锌氧压浸出液针铁矿除铁产出铁渣中的氧化锌,原来采用传统的钙法脱硫工艺处理回转窑烟气,存在脱硫效果差、排放尾气不达标、石膏渣难处置、开工率低等问题.经多方考证后,决定改用氧化锌脱硫工艺进行处理,脱硫剂采用自产氧化锌烟尘或焙砂,产出的二氧化硫返回制酸系统,酸解液返电锌系统,不产生二次固体废物.新系统投... 相似文献
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焦化厂锅炉在燃烧过程中会产生大量的烟气,在这些烟气中含有对环境造成污染的烟尘颗粒、含硫和含硝等物质,为避免环境污染,需要采用科学合理的除尘和脱硫脱硝技术。主要对焦化厂锅炉脱硫脱硝与烟气除尘技术进行分析与探讨,并将脱硫脱硝及烟气除尘技术应用于某焦化厂锅炉生产中。应用结果表明:该技术的应用为焦化厂锅炉污染问题的综合治理提供了技术支持,加快了焦化厂锅炉向绿色生态方向发展速度,有效减轻了焦化厂锅炉运行对生态环境造成的污染。 相似文献
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干熄焦除尘技术在济钢的应用 总被引:1,自引:0,他引:1
济钢干熄焦工程采用陶瓷多管除尘器和湿凝聚式除尘器组合的水膜除尘技术,经合理设计,达到了同时去除烟尘和烟气中二氧化硫的目的,除尘效率达到98%,气体排放低于国家标准,年创效益25.69万元。 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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莱钢50t电炉采用屋顶大烟罩与电炉第四孔相结合的正压大寺器进行除尘,烟尘排放达到GB1629-1996标准要求,除尘风机采用防磨技术后,叶轮使用寿命达到2年以上。 相似文献
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山东球墨铸铁管有限公司在烧结机上采用双碱法脱硫技术,用NaOH作为脱硫剂,用Ca(OH)2作置换剂.主要消耗石灰,整个工艺由烟气除尘系统、烟气脱硫系统、脱硫渣处理系统3部分组成。该技术应用后,除尘及脱硫效果均达到国家排放标准,全年可减少SO2排放量1246.32t。 相似文献
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氨法HPF煤气脱硫工艺的应用与完善 总被引:2,自引:0,他引:2
介绍了氨法HPF煤气脱硫工艺指标控制和操作经验,并对部分脱硫工艺进行了技术改进,改造后不仅可将煤气的脱硫效率提高到90%-96%,而且脱硫成本可降低30%。 相似文献
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介绍了转炉煤气干湿法除尘现状.阐述了提高转炉煤气节能减排的干湿法技术措施.其中,湿法除尘装置和技术改进有塔-文结构除尘装置和近期研发的布袋除尘装置,前者包括:新一代一塔式煤气湿法除尘装置,塔-文分装式煤气湿法除尘装置,以及新型塔-文分装式煤气湿法除尘装置.干法除尘技术改进包括:转炉煤气LT干法电除尘和转炉煤气高温袋式除尘系统. 相似文献