共查询到20条相似文献,搜索用时 15 毫秒
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D.A. Froelich G.M. Graves 《Journal of the Air & Waste Management Association (1995)》2013,63(3):314-321
The Clean Air Act Amendments of the early 1970s required coal burning utilities to reduce their emissions of sulfur dioxide. Lime or limestone based wet systems were employed for flue gas desulfurization (FGD). These systems reduced flue gas temperatures to below acid dew point conditions. Concerned about the prospect of ductwork exposed to a saturated, acid-rich environment, most utilities turned to stack gas reheat (SGR) to increase flue gas temperatures. By 1980, 82 percent of all FGD facilities employed SGR. Today there are about 130 FGD systems of which 101 employ some form of stack gas reheat. 相似文献
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《Journal of the Air & Waste Management Association (1995)》2013,63(11):1369-1372
This article describes an electrochemical corrosion monitoring system developed in England that offers utilities the capability of continuously measuring power plant corrosion activity for a wide range of operating conditions. 相似文献
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Dewatering of wastewater sludge by heat treatment 总被引:1,自引:0,他引:1
J G Everett 《Journal - Water Pollution Control Federation》1972,44(1):92-100
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脱硫废水水质复杂、含有重金属,处理难度很大,为此开发了一种新型的脱硫废水处理技术——蒸发塔技术,可以实现脱硫废水的零排放。在实验室搭建了小型蒸发塔实验台,对脱硫废水的蒸发特性、热量衡算进行了研究。研究表明:导流板角度一定的情况下,脱硫废水主蒸发区在塔体中心位置,随着脱硫废水处理量的增加,主蒸发区域向塔壁和塔体下部偏移;导流板角度减小,高温区下移;雾矩受给液量和雾化器转速的双重影响,给液量越大,雾矩越大,转速越大,雾矩越小;塔径一定的条件下,适当调节进风量和导流板角度可增加脱硫废水的处理量;模拟计算表明,蒸发系统抽取热烟气量较少,不会对电厂热系统产生明显影响。 相似文献
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A. A Reisinger D.C. Gehri 《Journal of the Air & Waste Management Association (1995)》2013,63(4):419-421
The results of the Kansas City-Wyandotte County Department of Health study of operation and maintenance ( O &; M) practices at a fiberglass manufacturing facility and a secondary metals smelter demonstrate the substantial impact of O &; M practices on particulate emissions. Both facilities have a history of O &; M problems leading to excessive particulate emissions. Over a period of time, detailed O &; M information was obtained from facility management and operating personnel. Extended periods of in plant observation of O &; M procedures were correlated with simultaneous outside observations of visible emissions. O &; M related excessive emission problems at the secondary metals smelter were found usually to be caused by operator errors, compounded by marginally effective control equipment. In contrast, the excessive emissions problems at the fiberglass plant were almost always caused by actual process or control equipment malfunctions. These malfunctions appear to be almost inherent in the types of control equipment used, e.g. water washed high voltage electrostatic precipitators, and occurred despite a comprehensive O &; M program at the fiberglass plant. 相似文献
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多级雾化超重力旋转床是一种新型的强化传质设备 ,适合于大流量的废气处理。本文选择NaOH Ca(OH) 2双碱法烟气脱硫工艺进行了实验研究 ,考察了再生液的PH0 值、液气比及气体中的SO2 初始浓度等对脱硫率的影响 相似文献
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NID半干法脱硫灰生产蒸压砖中试实验研究 总被引:1,自引:0,他引:1
为了实现NID半干法脱硫灰综合利用,对利用吉林某电厂NID半干法脱硫灰作为主要原料在现有生产线生产蒸压砖进行研究,中试实验结果表明,在对现有生产线的各工艺参数进行调整及配方优化下,可以解决直接利用NID半干法脱硫灰为蒸压砖主要原材料所产生的诸如层裂、龟裂、强度低等问题,生产出30%NID半干法脱硫灰添加量的蒸压砖。并在对NID半干法脱硫灰进一步预处理下,生产出40%NID半干法脱硫灰添加量的蒸压砖。产品满足国家M15标准规定的外观、强度及抗冻融性等指标。 相似文献
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Jonas S. Klingspor 《Journal of the Air & Waste Management Association (1995)》2013,63(7):801-806
A laboratory size spray dry scrubbing unit consisting of a spray dryer and a pulse Jet baghouse was used to study the effect of grinding recycle waste on SO2 removal across the spray dryer and on sorbent utilization. The equipment treats simulated flue gas with a dry flow rate of 1.5 m3 h?1 (stp) and utilizes an ultrasonic nozzle for atomization. The apparatus was initially tested over a broad range of operating conditions; a close agreement in SO2 removal was found with data from much larger units. The effect of grinding the FGD recycle material on the SO2 removal across the spray dryer was found to be great. Grinding the recycle material can enhance the SO2 removal efficiency to a level comparable to operation with a large excess of fresh lime. 相似文献
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利用烧结脱硫灰制备胶凝材料的研究 总被引:3,自引:0,他引:3
研究了烧结烟气半干法脱硫灰复掺矿渣、钢渣,辅之外加剂,制备胶凝材料的可行性。结果表明,采用改性脱硫灰(GXTLH)、钢渣、矿渣及水泥熟料再混磨制备的复合胶凝材料,具有良好的安定性等水化性能和力学性能;当GXTLH 掺入量为20%、CFII 1.5%、减水剂0.5%及水泥熟料23%时,矿渣掺量在12%~44%、钢渣掺量11%~44%之间制备的胶凝材料初凝时间、终凝时间、力学性能满足GB13592-92《钢渣矿渣水泥标准》;矿渣与钢渣比、水泥熟料及外加剂等掺量一定,GXTLH掺量超过30%时,GXTLH胶凝材料的抗压抗折强度均有所下降。 相似文献
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循环流化床烟气脱硫技术及其环境经济可行性探讨 总被引:1,自引:0,他引:1
简要介绍了循环流化床烟气脱硫技术的原理和国内外研发的现状,并与目前得到广泛应用和继续发展的其它3种烟气脱硫工艺进行比较,得出循环流化床烟气脱硫净化工艺具有投资相对较低、脱硫效率较高、运行可靠、操作维护方便等优点。再通过实例,从投资、技术、运行成本等方面论述其环境经济的可行性,得出循环流化床烟气脱硫技术符合江阴现阶段经济发展状况,能满足中、小型锅炉脱硫要求,是一种较为可行的大气污染控制技术。 相似文献
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为进一步认识污泥脱水的机理,寻找更为有效的污泥脱水方法,提出了一种新的污泥中水分存在形式的划分方法,同时进行了自重、离心、盐溶液渗析脱水3种实验,并利用光学显微镜和扫描电镜等手段,对原状污泥与3种脱水后污泥的微观结构进行形态学及定量分析。自重、离心、盐溶液渗析脱水后污泥的最终含水率分别为89.4%、78.0%、28.4%,且不同脱水方式会影响污泥的微观结构,进而影响脱水效率;污泥中微生物、絮团、褶皱、裂隙及物质成分等方面是污泥中水分难以脱除的重要原因。污泥在不同的脱水阶段,水分的存在形式不同,脱水的难易程度也不同;脱水程度越高的脱水手段,其脱水后污泥的结构越紧密,孔隙率及等效孔径明显降低,可通过减小污泥内部孔隙的方式进一步提高脱水效率。 相似文献
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微波辐照糠醛渣制备活性炭及其性能研究 总被引:3,自引:0,他引:3
以糠醛渣及废炭粉为原料,通过掺合活化剂K2CO3成形后,在微波辐照下活化制备活性炭.研究K2CO3掺合比、辐照功率、活化气体CO2流量、辐照时间对活性炭结构与脱硫性能的影响,并设计正交实验优化工艺条件.结果表明,在最佳工艺条件下,即K2CO3掺合比为1.0:2.0(质量比)、辐照功率为640 W、CO2流量为200 mL/min、辐照时间为10 min时,活性炭的吸附和脱硫性能较佳.扫描电镜和脱硫实验表明,后处理前后的活性炭在结构和脱硫性能以及脱硫机制上差异较大. 相似文献