我国烟气脱硫技术的开发工作

不久以前,上海市环保所与宝钢环保处曾组织协作,对国外烟气脱硫(Flue Gas Desulfurization,FGD)技术的发展与应用状况作了资料调查,对各种FGD流程特别是得到工业规模应用的流程作了比较详细的技术经济评价,目的是借助国外的发展经验,供国内从事FGD决策与实际工作的同志参考。这一点之     

烟气脱硫技术经济评价

<正> 烟气脱硫(Flue Gas Desulfurigafion,简称FGD)技术在大气污染控制方面居于显要地位。然而,在实际应用中,经济问题往往成了制约因素。工业上对于这项技术的采用深感棘手,主要原因在于它的投资和运行费用太大。一般火电厂的FGD投资约占总     

环境系统学(环境系统工程)

XI{)2 9502」08湿法石灰石排烟脱硫系统成本简化模型/杜嘉陵(贵州工学院)//环境保护/国家环保局一1994,(11)一8一9环信X一7 湿法石灰石排烟脱硫(FGD)系统是控制502的一种有效方法。本文介绍了FGD系统经济模型的总体结构,并详细地讨论系统设备的模型方程。所得结论:FGD系统经济模型、可以估算用湿法石灰石FGD系统控制502的成本。根据其他详细模型的数据和工程的系统分析,确定了FGD系统的模型公式。开发这些模型的主要准则是:①详细资料用量少,计算简单而且使用经济;②对50:排放规定,煤特性、电厂大小和重要的技术设计参数敏感;③规定…     

FGD取消GGH对区域环境的影响研究——以洛河电厂为例

介绍了湿法烟气脱硫系统取消气气换热器的国内外现状,阐述FGD系统设置GGH的负面影响,在对洛河电厂大气污染源监测的基础上,预测FGD系统中取消GGH装置对研究区域大气污染物扩散的影响。结果表明：在静风条件下,FGD系统取消GGH装置大气污染物的扩散对关心点的影响不甚明显;污染源对各关心点日均浓度贡献最大的为上窑镇;不同气候条件下,FGD系统取消GGH装置对研究区域环境空气质量贡献值仅是很小一部分。     

燃煤电厂FGD系统中石灰石粉制备技术及在浙江的应用

主要结合浙能乐清发电厂2×600 MW+2×660 MW机组的烟气脱硫所需的石灰石粉的制备技术,对FGD系统中石灰石粉的制备技术的原理、系统流程、石灰石粉制备工艺中需考虑的主要因素等进行一些分析,为燃煤电厂FGD系统石灰石粉的制备技术提供了参考.     

烟道气脱硫装置的结构材料

在烟道气脱硫装置(FGD)中,以石灰或石灰石灰浆洗涤电厂烟道气可脱除SO_2。一座新建的规模为1,000兆瓦(MW)电厂,FGD设备的费用约占其投资和运行费用的25％。预计在未来的十年中,电力部门在FGD设备上将花费10亿美元/年。FGD设备结构材料如果选用不当将会造成重大浪费,     

烟气同时脱硫脱硝技术进展

化石燃料在燃烧过程中排放大量酸性污染物,如SO2和NOx,对环境产生严重的污染,使之成为世界性的环境污染问题。目前,最有效的脱硫技术之一是烟气脱硫（FGD）。湿法FGD工艺已经被广泛的使用,此工艺费用较低、易于操作,具有较高的SO2去除效率。但此法不能有效地脱除NOx,因为NOx极难溶于水。去除NOx的技术主要分为两大类：燃烧过程控制和燃烧后处理。     

Modification of FGD gypsum in hydrothermal mixed salt solution

A novel utilization way of the sludge from wet calcium-based flue gas desulfurization （FGD） processes has been developed in this paper. This study focused on the conversion of the FGD gypsum into α-hemihydrate calcium sulfate by a hydrothermal salt solution method at atmospheric pressure. Experimental study has been carried out in a batch reactor. Qualitative and quantitative analyses were made by DSC/TG thermal analysis, SEM, XRD, metalloscope and chemical analysis. The experimental results showed that the modification of FGD gypsum was controlled by the dissolution and recrystallization mechanisms. With the introduction of FGD gypsum the salt solution was supersaturated, then crystal nucleus of α-hemihydrate calcium sulfate were produced in the solution. With the submicroscopic structure of FGD gypsum crystal changed, the crystal nucleus grew up into α-hemihydrate calcium sulfate crystals. Thus ,the modification of FGD gypsum was fulfilled.     

燃煤电厂烟气脱硫技术及其主要工艺

简要介绍了我国二氧化硫的排放及其污染现状、燃煤电厂湿法、半干法、干法、可回收工艺和联合SO2／NOx工艺等五类烟气脱硫（FGD）技术及其主要的工艺，并对我国烟气脱硫技术的发展进行了探讨，指出我国烟气脱硫技术的发展应走国产化的道路，在具体的脱硫工艺的选择上应具体问题具体分析。     

火力发电厂烟气脱硫技术问题初探

本文综合分析了国内外火力发电厂烟气脱硫(FGD)工艺及设备，提出了建立烟气脱硫示范工程．推荐采用双碱法烟气脱硫技术。     

湿法脱硫中石灰石耗量的经济性分析

石灰石耗量是烟气脱硫系统(FGD)性能试验中较为重要的测试项目,主要考核FGD中吸收剂的利用效率,它的高低将直接影响FGD的运行成本。主要介绍了钙硫比和石灰石耗量的测试方法,对运行中石灰石耗量的影响因素进行了分析,并通过对盘电公司脱硫系统运行参数的分析比较,提出了降低石灰石耗量的可行性运行方案。     

Fate of mercury in flue gas desulfurization gypsum determined by Temperature Programmed Decomposition and Sequential Chemical Extraction

A considerable amount of Hg is retained in flue gas desulfurization(FGD) gypsum from Wet Flue Gas Desulfurization(WFGD) systems. For this reason, it is important to determine the species of Hg in FGD gypsum not only to understand the mechanism of Hg removal by WFGD systems but also to determine the final fate of Hg when FGD gypsum is disposed. In this study, Temperature Programmed Decomposition(TPD) and Sequential Chemical Extraction(SCE) were applied to FGD gypsum to identify the Hg species in it. The FGD gypsum samples were collected from seven coal-fired power plants in China, with Hg concentrations ranging from 0.19 to 3.27 μg/g. A series of pure Hg compounds were used as reference materials in TPD experiments and the results revealed that the decomposition temperatures of different Hg compounds increase in the order of Hg_2Cl_2 HgCl_2 black HgS Hg_2SO_4 red HgS HgO HgSO_4. The Hg compounds existing in FGD gypsums identified by TPD included HgCl_2, Hg_2Cl_2, Hg_2SO_4, black HgS and red HgS, of which mercury sulfides were the primary compounds. The results of SCE indicated that Hg was mainly distributed in the strongly complexed phase. The low Hg content in FGD gypsum increases the ambiguity of assigning extraction fractions to certain Hg species by SCE. The fact that the primary compounds in FGD gypsum are HgS phases leads the leaching of Hg in the natural environment to be quite low, but a considerable amount of Hg may be released during the industrial heating process.     

一种提高石灰石-石膏法脱硫效率的方法-托盘塔

全面介绍了石灰石-石膏法脱硫工艺（FGD法）的发展情况及特点,提出了-种提高石灰石-石膏法脱硫效率的方法即托盘塔,通过与常规方法相比较,详细说明了托盘塔技术的特点和优势,为石灰石-石膏法脱硫工艺技术改造提供了新思路,开拓了新途径。     

Mercury transportation in soil via using gypsum from flue gas desulfurization unit in coal-fired power plant

The mercury flux in soils was investigated, which were amended by gypsums from flue gas desulphurization (FGD) units of coal- fired power plants. Studies have been carried out in confined greenhouses using FGD gypsum treated soils. Major research focus is uptakes of mercury by plants, and emission of mercury into the atmosphere under varying application rates of FGD gypsum, simulating rainfall irrigations, soils, and plants types. Higher FGD gypsum application rates generally led to higher mercury concentrations in the soils, the increased mercury emissions into the atmosphere, and the increased mercury contents in plants (especially in roots and leaves). Soil properties and plant species can play important roles in mercury transports. Some plants, such as tall fescue, were able to prevent mercury from atmospheric emission and infiltration in the soil. Mercury concentration in the stem of plants was found to be increased and then leveled off upon increasing FGD gypsum application. However, mercury in roots and leaves was generally increased upon increasing FGD gypsum application rates. Some mercury was likely absorbed by leaves of plants from emitted mercury in the atmosphere.     

湿法石灰石排烟脱硫系统成本简化模型

根据国外的经验湿法石灰石排烟脱硫(FGD)系统是控制SO_2的一种有效方法.因此,越来越多的注意力集中到湿法FGD系统的成本上.这就要求有适当的方法来系统地评估这类成本,并定量地确定能源、环境、和经济因素之间的重要协调.本文首先介绍湿法FGD系统经济模型的总体结构,然后详细地讨论系统设备的模型方程.     

活性碳对汞的吸附作用(续)

图1显示出PC—100,FGD和HGR孔径大小的分布。这些曲线的获得来自于氮的等温吸附线。由图1可以看出,FGD的孔径大多大于HGR和PC—100,而HGR(25～25μm)具有一个孔隙直径小于5.0nm的重要的孔隙比值,呈现了最小的     

Dissimilatory reduction of Fe~III (EDTA) with microorganisms in the system of nitric oxide removal from the flue gas by metal chelate absorption

IntroductionThecombustionoffossilfuelsgeneratesSO2 andNOxpollutantswhichcauseairpollutionandacidrain .Existingfluegasdesulfurization(FGD)scrubbersinvolvelimestoneprocesses,whichareefficientforcontrollingSO2 emission ,butareincapableofremovingalmostwater i…     

脱硫旁路烟道封堵及应对措施

根据国家环保部十二五规划,持续推进污染物总量减排工作,燃煤发电机组必然将取消旁路,文章主要根据我公司实际情况分析了影响取消FGD旁路烟道的因素、如何对旁路烟道进行封堵以及封堵后为保证脱硫系统正常运行所采取的技术措施.     

火电厂湿烟囱排放的可行性探讨

在石灰／石灰石-石膏法湿法烟气脱硫（FGD）工艺中,是否安装烟气热交换器（GGH）的问题一直受到关注。本文介绍了湿法烟气脱硫工艺中GGH的作用,设置GGH的弊端,以及湿烟囱排放对工艺和设备所提出的更高的设计要求。从安全和经济角度考虑,对于FGD工艺采用湿烟囱排放代替GGH是可行的。     

脱硫旁路烟道封堵及应对措施

根据国家环保部十二五规划，持续推进污染物总量减排工作，燃煤发电机组必然将取消旁路，文章主要根据我公司实际情况分析了影响取消FGD旁路烟道的因素、如何对旁路烟道进行封堵以及封堵后为保证脱硫系统正常运行所采取的技术措施。