【摘 要】
：
In the present study,the effects of relative humidity on filtrating coal-fired fly ash with hydrophobic poly tetra fluoroethylene (PTFE) membranes were investigated.The intergranular force of particulate matter at different RH conditions was measured by a
【机 构】
：
Chemical Engineering Department,Nanjing Polytechnic Institute,Nanjing 210048,China;State Key Laborat
论文部分内容阅读
In the present study,the effects of relative humidity on filtrating coal-fired fly ash with hydrophobic poly tetra fluoroethylene (PTFE) membranes were investigated.The intergranular force of particulate matter at different RH conditions was measured by analyzing the critical angle between particles.Effects of humidity (from 30％ to 70％) on filtration pressure drop and membrane fouling conditions were charac-terized.It was found the membrane showed optimal filtration resistance of 530 Pa at RH of 60％ and the gas permeance can be maintained at 1440 m3·m-2·h-1·kPa-1.Moreover,to optimize the operation parameters for this filtration system,effects of fly ash concentration,diameter,membrane pore size,and gas velocities were systematically investigated.
其他文献
氧化铝用球磨机磨内矿浆碱性强、温度高,其工况较普通矿用球磨机更为恶劣.大型氧化铝用球磨机在使用中常出现主轴承油膜厚度不足、油温高、轴瓦寿命短,甚至烧瓦的事故;分瓣大齿轮紧固面张口,齿轮运转异响、振动大;高温碱性蒸汽外溢严重.因此在设计时必须注意与普通矿用球磨机的区别,对上述关键问题要深入研究,有针对性地进行优化设计.所设计的大型溢流型球磨机已成功应用于某氧化铝厂,并取得了较好的应用效果.
针对某公司转炉渣难选的特点,在考察及分析选矿厂原有工艺的基础上,开展现有流程的阶段磨矿阶段选别试验研究,确定了最佳的磨矿细度及药剂制度:一段磨矿细度为-0.074 mm占70％,捕收剂L-35用量为90 g/t,起泡剂2号油用量为65 g/t;二段磨矿细度为-0.045 mm占90％,捕收剂L-35用量为45 g/t,起泡剂2号油用量为20 g/t.在此条件下,可获得铜精矿品位为32.94％、尾矿回收率为0.19％ 的指标,为后期进一步优化技术参数、降低尾矿含铜品位提供了依据.
The need for sustainable fuels has resulted in the production of renewables from a wide range of sources,in particular organic fats and oils.The use of biofuel is becoming more widespread as a result of environ-mental and economic considerations.Several e
采用热法制氯化铵工艺处理部分过滤母液,工艺过程为纳滤、MVR蒸发、真空结晶,可制备纯度较好的氯化铵,并使热法工艺与冷法互补,达到控制母液膨胀,减小循环量的目的.
An analysis approach considering gas-solids hydrodynamics,reaction kinetics and reacting species non-uniformity together in a dual-reactor system is presented for better understanding its mass and energy balance.It was achieved by a 3-dimensional comprehe
主要介绍了重灰自身返碱煅烧炉炉头预混段结构及相关组件的作用,同时针对炉头预混段内抄板频繁脱落的问题分析原因并给出加固改进方法,以供同行参考.
2 ?014 年,青龙寺煤矿在工作面回风巷用两架一组 形式的超前液压支架代替单体支护,解决了单体支护推进速度慢、支护强度低、支护面积小、支设和回撤劳动强度大、安全系数低、维修成本高等问题.但是工作面运输巷由于巷道高度低、转载机短、配套设备体积大等因素,无法布置两架一组形式的超前液压支架,仍然采用单体支护.2021 年青龙寺煤矿与郑煤机集团合作研制了单列超前支架,解决了工作面运输巷的支护问题[1-4].
In this research gasoil desalting was investigated from mass transfer point of view in an eductor liquid-liquid extraction column (eductor-LLE device).Mass transfer characteristics of the eductor-LLE device were evaluated and an empirical correlation was
介绍了氯化铵的回转干燥工艺.从工艺、能耗、环保、非满负荷工况等方面对内加热流化床工艺和回转干燥工艺进行了对比分析.研究证明,回转干燥工艺的汽耗、电耗、尾气排放量均大幅度低于内加热流化床工艺.在非满负荷工况时,效果更加显著.
采用系统循环母液保温转化-冷结晶纯化工艺对国外某含氟天然碱进行除氟工艺技术研究,除氟率达到83.42％.经除氟后的转化母液冷却结晶得到十水碱,再通过热溶精制、蒸发结晶和煅烧分解得到高品质重质纯碱,纯度高达99.5％以上,解决了含氟天然碱精制提纯重质纯碱的关键技术难题.本技术成功回收了系统母液,提高了资源利用效率,同时副产的含氟渣通过精制也可制成NaF用于涂装工业等领域,为含氟天然碱的绿色开发奠定了理论基础.