电袋复合除尘器在烧结机机尾除尘中的应用

针对龙钢原265 m2烧结机机尾电除尘系统除尘效果差、达不到国家排放标准的情况,通过现场分析,结合目前国内电袋复合除尘器的研究和应用成果,决定在除尘改造中采用电袋复合除尘器。改造后取得了良好效果,为电袋除尘器在烧结系统中的应用提供了借鉴。     

电袋复合除尘器在烧结除尘系统中的应用

简单介绍了电袋复合除尘器结构、工作原理、性能特点以及在莱钢烧结除尘系统中的应用。采用电袋复合除尘器对烧结机尾除尘及成品除尘系统进行改造,取得了较好的效果。     

山东铝布袋除尘改造完成

4^#锅炉是山东铝热电厂容量最大的设备之一,改造前,4^#炉采用静电除尘,耗电量大,收尘效果不理想。为实现最佳环保效益,该厂在资金异常紧张的情况下,利用“一大三小”非满负荷弹性生产的有利时机,投资260余万元,淘汰静电除尘器,改造安装复合式电袋除尘器。日前,44^#锅炉布袋除尘改造项目全面竣工,复合式电袋除尘器投运后,锅炉排放物烟气入口含尘浓度将由35000mg／标准m^3降低至出口含尘浓度45mg／标准m^3,     

烧结机尾除尘改造方案的对比分析

为满足国家钢铁行业大气污染物新颁标准排放限值要求,对265m~2烧结机尾除尘器进行改造,从烟尘特性、工程投资、运行费用、维修费用等几个方面,将电袋复合式除尘器和脉冲布袋除尘器方案进行比较,选择合理的除尘器改造方案,改造后达到了环保要求,取得了较好的经济效益。     

烧结机机尾电袋复合除尘技术应用

山钢股份莱芜分公司炼铁厂1~#105 m~2烧结机机尾电除尘器改造为电袋复合除尘,电袋复合除尘器具有占地小、投资省、除尘效果好等技术优势,投产后经检测,烟尘排放浓度为15.6 mg/m~3,年经济效益约194万元。     

电-袋复合除尘技术的应用实践

通过梅钢能源公司1号除尘技术改造的实例，阐述了燃煤品种杂及掺烧高炉煤气的火电厂将电除尘器改造为电一袋复合除尘器的可行性。     

电袋除尘技术的研究进展

电袋复合除尘器已成为具有良好应用前景的高效除尘器.论文综述了电袋除尘技术的研究进展,阐述了其工作原理及性能优势,并指出了电袋除尘技术发展中可行的研究技术方法和需解决的关键问题,为该技术理论及应用基础研究提供了参考.     

电袋除尘技术的研究进展

电袋复合除尘器已成为具有良好应用前景的高效除尘器.论文综述了电袋除尘技术的研究进展,阐述了其工作原理及性能优势,并指出了电袋除尘技术发展中可行的研究技术方法和需解决的关键问题,为该技术理论及应用基础研究提供了参考.     

烧结机尾除尘改造

莱钢1#105m2烧结机通过增加1级121m2电除尘器,设计选用滤料和袋笼,改善供气系统,控制除尘清灰,改造集气罩、除尘管道等措施,将机尾电除尘器改造为电袋复合除尘器。改造后,实现了粉尘达标排放,粉尘排放浓度30mg/m3以下,布袋的完好率保持在99%以上,年节约运行费用47.5万元。     

电袋除尘器静电区内静电场及荷电粒子的数值模拟

运用FLUENT对电袋除尘器电场区域内流场、电晕电场、荷电粒子运动轨迹进行数值模拟,确定静电区捕集粉尘的最小粒径,优化静电区集尘板的最佳开孔范围.首先数值模拟了电袋除尘器静电区的流场分布和电场分布,在此基础上,分别数值模拟了粒径为0.5、1.5和2.5μm的粒子在外加电压为45 k V的电场中的运动轨迹和速度分布,并进行了数值分析.模拟结果表明:在该除尘器结构及模拟条件下,除尘器静电区通道内最小捕集粒径为1.5μm;在静电区通道内集尘板X方向的最佳开孔范围是0.324~1.25 m.研究结果为电袋除尘器静电区内结构的设计和优化提供理论参考.     

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.     

锌冶炼工厂含硫尾气采用氧化锌法脱硫的技术分析

分析了有色冶炼厂处理含硫尾气通常采用的方法和特点,介绍了锌冶炼厂采用氧化锌法的脱硫原理、工艺流程、吸收设备选择及PH值控制、吸收剂比较、亚硫酸锌处理等,提出了使用氧化锌法脱硫技术应注意的问题。     

石灰湿法烟气脱硫给液系统设计和工程实践

阐述了石灰湿法烟气脱硫给液系统工艺设计特点。采用间歇消化、两次定量稀释和三级连续沉砂工艺制备消石灰稀液 ,供给三台 6 5t/h锅炉烟气脱硫。工程实践表明 :消石灰稀液质量浓度稳定 ,易操作 ,易控制和易监督 ,证明了给液系统是湿法烟气脱硫的重要部分     

宝钢烧结烟气脱硫石膏质量控制及资源化利用

烧结烟气脱硫石膏的质量是石膏综合利用的关键因素之一.介绍了宝钢烧结烟气脱硫石膏的特性,分析了石膏质量的影响因素和控制措施,提出了烧结烟气脱硫石膏资源化的利用途径和注意事项.     

气喷旋冲烧结烟气脱硫技术及其应用效果

介绍了宝钢气喷旋冲烧结烟气脱硫技术的研发背景,工艺与关键设备研发情况,并系统阐述了工业试验研究与工程化技术总成情况。详细介绍了工程化应用情况,以实际烧结脱硫工程为例,对干湿法烧结烟气脱硫装置的运行情况和技术经济指标进行了对比分析。     

我国烟气脱硫技术的发展及应用现状

扼要介绍了国内目前正在运行或研究的烟气脱硫技术,阐述了湿法、半干法、干法和生产脱硫技术在我国的发展及应用情况,并对对各种技术对加分析比较,提出了半干法烟气脱硫比较适合我国国情,值得加以深入研究和推广。     

钢铁联合企业控制二氧化硫污染的探讨

针对钢铁联合企业各工序排放二氧化硫的特点,指出烧结和自备电站是主要污染对象。在肯定利用碱性物质的ＦＧＤ技术是当前最经济可行的脱硫技术前提下,分析了钢铁联合企业中碱性物质的用途和流失情况,提出将可回收的碱性废水直接用于ＦＧＤ的可能性和减少资源消耗的重要意义     

CDC42 and FGD1 cause distinct signaling and transforming activities

Activated forms of different Rho family members (CDC42, Rac1, RhoA, RhoB, and RhoG) have been shown to transform NIH 3T3 cells as well as contribute to Ras transformation. Rho family guanine nucleotide exchange factors (GEFs) (also known as Dbl family proteins) that activate CDC42, Rac1, and RhoA also demonstrate oncogenic potential. The faciogenital dysplasia gene product, FGD1, is a Dbl family member that has recently been shown to function as a CDC42-specific GEF. Mutations within the FGD1 locus cosegregate with faciogenital dysplasia, a multisystemic disorder resulting in extensive growth impairments throughout the skeletal and urogenital systems. Here we demonstrate that FGD1 expression is sufficient to cause tumorigenic transformation of NIH 3T3 fibroblasts. Although both FGD1 and constitutively activated CDC42 cooperated with Raf and showed synergistic focus-forming activity, both quantitative and qualitative differences in their functions were seen. FGD1 and CDC42 also activated common nuclear signaling pathways. However, whereas both showed comparable activation of c-Jun, CDC42 showed stronger activation of serum response factor and FGD1 was consistently a better activator of Elk-1. Although coexpression of FGD1 with specific inhibitors of CDC42 function demonstrated the dependence of FGD1 signaling activity on CDC42 function, FGD1 signaling activities were not always consistent with the direct or exclusive stimulation of CDC42 function. In summary, FGD1 and CDC42 signaling and transformation are distinct, thus suggesting that FGD1 may be mediating some of its biological activities through non-CDC42 targets.     

Beneficial Reuse of FGD Material in the Construction of Low Permeability Liners: Impacts on Inorganic Water Quality Constituents

In this paper, we examine the water quality impacts associated with the reuse of fixated flue gas desulfurization (FGD) material as a low permeability liner for agricultural applications. A 0.457-m-thick layer of fixated FGD material from a coal-fired power plant was utilized to create a 708?m2 swine manure pond at the Ohio Agricultural Research and Development Center Western Branch in South Charleston, Ohio. To assess the effects of the fixated FGD material liner, water quality samples were collected over a period of 5?years from the pond surface water and a sump collection system beneath the liner. Water samples collected from the sump and pond surface water met all Ohio nontoxic criteria, and in fact, generally met all national primary and secondary drinking water standards. Furthermore it was found that hazardous constituents (i.e., As, B, Cr, Cu, and Zn) and agricultural pollutants (i.e., phosphate and ammonia) were effectively retained by the FGD liner system. The retention of As, B, Cr, Cu, Zn, and ammonia was likely due to sorption to mineral components of the FGD liner, while Ca, Fe, and P retention were a result of both sorption and precipitation of Fe- and Ca-containing phosphate solids.     

宝钢FGD工艺抉择之我见

论述了国外ＦＧＤ（烟气脱硫）的发展和国内的进展以及ＦＧＤ工艺选择原则。较详细地介绍了湿式氨法、干式氨法以及钢渣法的ＦＧＤ流程。同时就宝钢实施ＦＧＤ的可能性作了分析。