面向钢铁烧结烟气NOx吸附净化的吸附剂特性

吸附法是有望同时实现烟气NO_x超低排放深度净化与资源化的关键技术,高效NO_x吸附剂是其核心关键,然而目前针对满足应用需求的NO_x吸附剂仍缺乏系统认识。本文基于烟气NO_x净化效率及材料热稳定性实际需求,分析挑选了沸石、金属氧化物、硅铝胶等代表性吸附剂,研究了NO_x在各吸附剂上的吸附穿透、吸附量、程序升温脱附等关键特性,结合吸附剂孔道特性对比发现,中低硅H-ZSM-5沸石兼具较高NO_x净化深度、NO_x吸附量、较低脱附温度且可获得更易于资源化的NO_x解吸气,因而可作为优选NO_x吸附剂。进一步地,随着吸附温度升高,硅铝比(w(SiO₂)/w(Al₂O₃) )为25、38的H-ZSM-5的NO_x吸附量均降低,其中低硅H-ZSM-5的NO_x吸附量较高,但吸附传质系数较低。本文可为烟气NO_x吸附净化的效益环保技术提供指导。      

世界铝电解烟气干式净化法近期的技术进步

世界铝电解烟气干式净化法近期的技术进步湘乡铝厂胡忠一、前言在铝电解生产过程中，要散发出以氟化氢为主的气态物质和以氧化铝、碳和冰晶石粉尘、氟化铝升华物等为主的固态物质，这些物质均是对人体和动植物很有害的污染物，按照环保要求，必须加以净化。这些物质特别是...     

浅谈铝电解生产的烟气净化技术

本文浅析了铝冶炼工业生产存在的环境问题，介绍了国内外铝冶炼工业烟气净化技术现状，论述了铝冶炼烟气净化技术，即“烟气收集、烟气净化、物料循环”能从根本上解决铝冶炼生产污染问题，实现铝冶炼工业的可持续发展。     

低温SCR烟气脱硝技术在湛江钢铁烧结工序的应用

“活性炭脱硫+低温SCR脱硝”组合式净化工艺在宝钢湛江钢铁实现了工业化应用,各污染物排放质量浓度达到国家超低排放标准限值。本文详细阐述了低温SCR脱硝系统的主要组成,分析并解决了运行中出现的结晶物堵塞、温度场不均的问题,为低温SCR脱硝技术在烧结工序烟气超低排放改造提供借鉴与参考。     

铝电解烟气干式净化技术的新进展

本文介绍了铝电解烟气干式净化在炼铝厂实际运用的几种典型方案，并从改进铝电解工艺、净化工艺设备，提高吸附介质性能等方面评述了这种干式净化法近期的新进展。     

冶炼烟气制酸净化工序改造实践

针对3.9m2熔炼炉和9 m2吹炼炉设计的制酸净化工序,采用绝热增湿稀酸洗涤工艺.为适应熔炼炉扩大到6 m2和吹炼炉扩大到11.2 m2的需要,对设备和工艺进行了局部改造和改进,最终实现了制酸与冶炼的配套,硫酸产量提高的同时减少了污酸排放量,节能减排效果明显.     

烟气脱硫与宝钢SO2控制

简要叙述烟气脱硫（ＦＧＤ）的现状和钢铁企业的硫污染及其特点，着重介绍了宝钢的ＳＯ２排放状况与控制对策。通过全公司硫平衡计算和分析，可清楚了解宝钢的硫的来源，分布和从而为制订适宜的控制措施，正确选定ＦＧＤ工艺装置提供依据。     

3吨电炉烟气净化

新余钢铁厂采用半封闭罩正压反吸袋式除尘器的3吨电炉烟气净化系统运行2年多来性能稳定,除尘效率高(>99％),操作简单,维修方便。木文介绍该系统的工艺造型、设备设计及环境效益。     

Development and commercial application of Baosteel sintering flue gas recirculating process

Because of the low temperature,large waste gas volume,high pollutant content,and complicated compositions,waste heat recovery and emission gas treatment of sintering flue gas have always presented a challenge in the steel industry,and this issue has attracted widespread attention both locally and abroad. Recently,based on the first domestic pilot plant and demonstration project,Baosteel has performed a series of innovative research and development investigations on its sintering flue gas recirculating( SFGR) process,in which the system design and optimization,dioxin-related contaminant source suppression,ore matching structure optimization,wear-resistant design of cycling fans and pipelines,high-efficiency dust removal equipment,system control and stable operation strategy,flue gas mixing and switching control,circular hood sealing,oxygen content conditioning,recirculation sintering system process control,and model development have been studied,and a complete set of equipment and technology for the SFGR process has been initially developed. The investigation results suggest that the SFGR process can not only significantly reduce exhaust gas volume and pollutant emissions but also recover low-temperature waste heat and reduce the energy consumption of sintering; therefore,the overall technologies possess great value in energy savings,pollution emission reduction,and sintering ore quality / yield improvement.     

宝钢炼铁节水途径与成效

宝钢铁前系统新水消耗量占公司吨钢水耗27．8％。近年来，炼铁厂通过积极探索多种节水途径，铁前系统新水单耗不断下降，节约了水资源，改善了环境，取得了明显的经济和社会效益。促进了炼铁系统的可持续发展。     

电解烟气净化工艺优化探讨

为解决电解烟气净化设备能耗高的问题,在达到净化系统的集气效率以及环保要求的条件下,对净化东、中、西部三套系统的工艺配置及设备运行方式进行分步优化,达到了节能减排的目的。     

Practice of flue gas desulfurization application technology in Baosteel No.3 Sinter Plant

With the enhancement of domestic steel production capacity,iron and steel enterprises have become one major source of SO2 emissions especially in the sintering process.Based on its own characteristics and combined with the experience of desulfurization,Baosteel No.3 Sinter Plant has independently developed the gas spout-swriling limestone-gypsum desulfurization technology,which includes processes,controls and equipments.The theory,process and control of the sintering desulfurization systems are described in this study.Through process monitoring,control and adjustment of operating parameters,the new desulfurization system fit in with the original sintering system.And the quality of the gypsum products is stable,which can be reused as by-product.This method can not only significantly reduce SO2 emissions,but also effectively reduce the cost of desulfurization.     

Development and applications of Baosteel sintering flue gas desulphurization technology

The research background and technical features of Baosteel sintering flue gas desulphurization(FGD)—swirl-jet-absorbing wet limestone-gypsum sintering FGD technology,process and equipment are introduced in this paper.Main contents and achievements of the pilot experiment and the engineering practice of Baosteel FGD are analyzed and discussed systematically.Past engineering practice experiences indicate that Baosteel FGD has the following merits:wide applicability to sintering flue gas features,such as frequently changing temperatures,unstable SO2 concentration,intensively fluctuating flow rates,etc.,high pollutants removal efficiency,low investment and energy consumption;stable and reliable operation,utilizable byproduct(gypsum),etc.It indicates that Baosteel sintering FGD is of extensive application value for the FGD of large and medium-scaled sintering machines.     

烧结烟气二恶英减排控制技术研究进展

二恶英作为毒性最强的持久性有机污染物之一,造成的环境污染问题已引起了国际社会的广泛关注。在钢铁冶炼过程中,二恶英主要产生于烧结工序。根据烧结过程中二恶英的生成机理和烧结烟气的排放特征,分别从烧结工序的源头治理、过程控制及烟气处理三个方面对现有的烧结过程二恶英控制技术进行了论述和分析,提出应根据烧结烟气排放量大且成分复杂的特点,采取将源头氯源控制、过程中废气循环和末端治理相结合的综合节能减排措施,而不是单一的二恶英控制技术。     

新型炼钢转炉煤气净化回收系统

分析了目前国内外炼钢转炉烟气除尘采用的两种方法,即LT法和OG法,这两种方法都没有对炼钢转炉800～1000℃以下余热进行回收.提出采用新型除尘器处理炼钢转炉烟气,可回收炼钢转炉烟气的余热,实现节能减排.     

宝钢炼铁技术的进步

１９９８年高炉生产稳定顺行，产量上升，喷吹煤量已达到２００ｋｇ／ｔ，烧结实现了低ＳｉＯ２生产，原料实现了智能化混匀矿堆积，焦炭质量保持良好，使宝钢炼铁的总体水平达到了世界先进水平。     

富氧侧吹直接炼铅烟气特性及净化除尘

以某公司铅冶炼项目工程设计为实例,着重介绍了“富氧侧吹氧化熔炼—富氧侧吹还原熔炼”生产工艺,并对富氧侧吹氧化炉出口烟气的特性进行了分析归纳,同时对其烟气净化除尘工艺的设计、设备选型、生产运行状况等进行了阐述和总结.      

迁钢球团烟气超低排放关键技术集成与应用

针对迁钢球团工序在实施烟气超低排放改造过程中面临的问题,提出了球团半干法提效技术耦合SCR高效脱硝的一体化污染物脱除工艺。通过工业试验进一步优化脱硫剂种类,开发出了以消石灰为脱硫剂的高效脱硫超低排放工艺;同时利用流体仿真技术,开发出与工艺相适应的导流板和整流器,实现了SCR脱硝装置内的流场和温度场的均匀化和氨逃逸的控制,最终实现了球团工艺烟气颗粒物排放浓度、SO₂排放浓度和NO_x排放浓度分别小于5、25和40 mg/m3的实绩,长期稳定满足超低排放要求。