共查询到20条相似文献,搜索用时 929 毫秒
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论述了变风量除尘系统的主要节能方式,对于单点除尘变风量除尘系统一般采取调节风机转数方式;而对于多点除尘变风量除尘系统则多采用调节风机转数和改变除尘系统风量相结合方式。文中详细分析了影响除尘风机寿命的主要因素,提出了提高除尘风机使用寿命的技术措施。 相似文献
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介绍了一套粉料自动配料装置除尘系统的结构、工作原理和各具体技术参数的选取方法。该除尘系统由回收除尘系统和集中除尘系统两部分组成 ,分别用于完成大批量投料和自动称量投料两个区域的粉尘回收工作。该除尘系统除尘效果较好 ,工作性能稳定 相似文献
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除尘系统是捕集、输送、净化含尘气体直至干净气体排放的整个系统,它由集气吸尘罩、除尘管路、除尘设备、除尘风机等组成。提出了除尘系统的设计原则和计算方法,为正确选择、合理配置除尘系统提供了设计依据 相似文献
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介绍了负压旋风气流干燥工艺流程和基本原理,给出了24万t/aPVC负压旋风气流干燥系统的详细设计计算过程,并简要介绍了该系统的应用情况。 相似文献
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An inverted cyclone gasifier and secondary cyclone combustor have been developed for use in a biomass fired small-scale cogeneration plant. The gasifier was designed with a vortex collector pocket (VCP) and a central collector pocket (CCP) to maximise particle and ash separation from the flow, and remove alkali and other heavy metal traces that agglomerate with the ash particles. The gasifier design was robust and suitable for firing with varying input conditions. The gasifier exhaust gas is suitable for directly firing into the secondary cyclone combustor without any complex hot gas clean up systems. The cyclone combustor produces a strong swirling flow with good mixing and burnout patterns, creating stable combustion conditions. The use of an additional VCP situated before the combustor exit removes the need for additional cyclone separators. An exhaust mounted tangential off-take on the combustor reduces pressure drop across the system and gives near uniform exhaust velocity profiles. The gasifier achieved 98–99% burnout with good separation/retention rates and 50% alkali, Na and K removal. A good quality low calorific value (LCV) gas was produced that could be effectively utilised in the cyclone combustor. The cyclone combustor produces a stable flow, with good mixing and burnout rates, and uniform exit conditions and could be operated in a lean mode to minimize NOx. The additional use of a VCP removed particles above 5 μm, as specified by turbine inlet conditions. The gas was suitable for directly firing into the gas turbine. Low pressure drop was found across the system. 相似文献
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This paper uses a quantity of moment of momentum to combine various parameters interacting in a separation cyclone. Due to construction features and flow characteristics, the swirl flow in the cyclone is essentially frictionless and, hence, the incoming momentums of both the transporting fluid and suspended particles are conserved. Visualizing a 50%-separation screen installed, and employing a stability-radius theory, the momentums are expressed in terms of distributed masses in the cyclone. Further, in conjunction with the continuity equation, the collection efficiency is determined. The predicted value differs from the experimental one by about 6%. 相似文献
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环流循环除尘系统是旋风分离技术上的一个重要突破,它成功地解决了用旋风分离器高效捕集亚微米粉尘(≤2μ)的问题,同时还具有压降低、操作弹性大等优点。而分离柱作为环流循环除尘系统的主要组成部分,对分离效果起着重要的作用。因此,对分离柱内部流场进行系统的研究十分必要。文章从柱坐标下理想流体的N-S方程和连续性方程出发,对环流循环除尘系统分离柱内旋风流场进行了系统的理论分析,推导出分离柱内理想流体的径向速度、切向速度和轴向速度的基本表达式,并将计算值和试验值进行了比较。研究结果表明,所采用的数学模型和计算公式是可行的。 相似文献
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分析了影响环己酮氨肟化装置蒸馏系统稳定运行和中间产品环己酮肟质量的主要原因,结合装置现有的工艺、设备情况,经过进行甲苯-肟混合物旋液分离侧线试验,实施了采用旋液分离净化技术的改造方案,提高了己内酰胺产品质量。 相似文献
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重介质旋流器选煤工艺的探讨 总被引:5,自引:0,他引:5
介绍了我国重介质选煤工艺的发展概况及采用重介旋流器分选的 5种选煤工艺 ;重点论述了 5种分选工艺的主要优缺点及重介旋流器的直径对其分选效果的影响 ,旋流器直径加大 ,必然提高分选下限。重介旋流器运行成本较高 ,单机处理能力较低 ,适宜处理末煤。 相似文献