共查询到18条相似文献,搜索用时 312 毫秒
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针对原锅炉除尘系统不具备脱硫功能的问题,采用钠钙双碱法烟气脱硫除尘技术对煤粉锅炉除尘装置进行了改造.对比了干法脱硫、半干法脱硫、湿法脱硫的工艺流程、脱硫效率、脱硫成本和污染程度;介绍了双碱法烟气脱硫除尘技术的脱硫原理、再生过程、除尘机理和工艺改造参数;对改造后的运行效果、经济效益和存在的问题进行了分析和论证. 相似文献
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综合喷淋洗涤、文丘里高效混合、旋风分离、拦截除雾等功能结构特点,研究开发出一种高效率的除尘脱硫一体化设备。实验和工程实例表明,该设备除尘脱硫效率高,投资运行费用低,除尘效率达98%,脱硫效率大于80%。高效除尘脱硫一体化设备适用于中小锅炉的烟气除尘脱硫处理。 相似文献
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洗涤器FGD技术的过去、现在和未来 总被引:1,自引:0,他引:1
洗涤器烟气脱硫(FGD)技术是燃煤锅炉烟气脱硫使用最早的一项环保技术,为大气的SO_2污染控制作出了巨大的贡献。本文通过对洗涤器FGD技术使用初期诸多不足之处的回顾和目前技术现状的介绍,阐明了燃煤电厂目前仍然大量使用洗涤器FGD技术的原因,介绍了洗涤器FGD未来发展方向。 相似文献
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伞形罩除尘脱硫器性能模拟和实验研究 总被引:1,自引:0,他引:1
针对中小型燃煤锅炉的粉尘和二氧化硫等有害气体的污染问题,自行研制一种新型伞形罩烟气除尘脱硫器。利用计算流体力学通用软件,选择雷诺应力模型(RSM)和离散相模型(DPM)模拟其中的气固相流动;并在入口气速为10.6 m/s,粉尘质量浓度为2—22 g/m3时,对其性能进行预测;再通过实验验证模拟值,结果表明:数值模拟可视化装置内的速度、压力、DPM浓度分布;模拟预测的压降值为230—250 Pa,除尘效率为84%—86%;压降与除尘效率的模拟值和实验值吻合较好,相对误差分别为4%和10%。因此,用数值模拟来预测评价新型伞形罩洗涤器的性能方便且可行。 相似文献
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针对水膜除尘器的功能和结构特点,综合运用喷淋洗涤、文丘里高效混合、拦截碰撞等洗涤混合原理,应用一种高效低阻力气体洗涤吸收装置对水膜除尘器进行脱硫改造。工程实践表明,应用该装置对水膜除尘器进行脱硫改造,可以做到除尘脱硫效率高,系统阻力低,投资运行费用低,除尘效率达到98%,脱硫效率大于80%。 相似文献
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对煤粉锅炉水膜除尘器及文丘里结垢、堵塞的原因进行了分析,主要原因为排烟温度高、除尘水量低、滤灰池效果差。介绍了水膜除尘器除尘脱硫一体化技术改造的原则和方案,并对改造后水膜除尘器的运行情况进行了总结。 相似文献
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The effects of operating parameters on desulfurization efficiency of a dual-alkali FGD process in a rotating-stream-tray (RST) scrubber are investigated. A dimensionless factor, e, is proposed in this study to predict desulfurization efficiency of this dual-alkali FGD system. e represents the desulfurization ability of a dual alkali FGD system, determined by five main operating parameters such as sodium ion concentration, ratio of absorbent flow rate to flue gas flow rate, pH value of absorbent solution, ratio of sulfate ion to total sulfur ion in absorbent solution, and sulfur dioxide concentration of inlet flue gas. The empirical expression for predicting desulfurization efficiency at different temperatures is obtained through the experimental study and theoretical calculation. It provides useful guide for engineering design. 相似文献
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S. Zarei E. JamshidiA. Afshar Ebrahimi 《Chemical Engineering and Processing: Process Intensification》2010
Removal of the poly vinyl chloride (PVC) dust particles by a new dynamical scrubber in a PVC manufacturing plant is presented in this work. The effects of inlet air flow rate (containing PVC particles) and water flow rate (the physical absorber of particles) on the PVC dust removal efficiency were investigated. The size of the PVC particles which have been treated in this study was ranging from 0.5 up to 20 μm. The experimental results showed approximately 100% removal efficiency for particles larger than 1 μm and 73% for 0.5 μm particles while employing low water flow rates. The results of these experimental tests indicate a good performance of the scrubber in a short residence time (about 2 s) which is also completely economic for removing fine particles. 相似文献
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通过理论分析,对大型文丘里式脱硫除尘器的设计和操作条件进行优化,推导出最佳气速与液气比的计算公式,并已应用于工业生产 相似文献
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V.G. Guerra J.A.S. Gonçalves J.R. Coury 《Chemical Engineering and Processing: Process Intensification》2011,50(11-12):1137-1142
It has been reported by previous studies [1], [2], [3], [4], [5], [6], [7] that droplet size in a Pease-Anthony Venturi scrubber depends on the jet atomization conditions, such as jet velocity and gas velocity. The assumption of this paper is that actual collector-droplet size in a confined tube such as the Venturi scrubber also depends significantly on preferential droplet deposition on the tube walls, which remove preferentially droplets of a certain size from the core, modifying the mean droplet size of the remaining droplets. To account for this effect, the present study is focused on the experimental measurement of the liquid deposition on the walls of a Pease-Anthony Venturi scrubber and the droplet size remaining in the core. The experiments were carried out varying jet penetration and the number of the injection orifices. A correlation, using dimensionless numbers, was proposed to quantify the influence of each experimental condition. The results showed that liquid deposition has a significant influence in actual collector-droplet size inside a Venturi scrubber. 相似文献