共查询到20条相似文献,搜索用时 62 毫秒
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以氧化锆(ZrO2)粉为主要原料,氧化铝(Al2O3)粉和氧化钇(Y2O3)粉为烧结助剂,采用有机泡沫浸渍工艺制备出高性能氧化锆泡沫陶瓷过滤板。研究了烧成温度和保温时间对样品容重、抗热震性和抗压强度的影响。采用万能试验机、综合热分析仪、X射线衍射仪、扫描电镜等对样品性能进行了表征。实验结果表明,当烧成温度为1580℃,保温时间为120 min时,制备的氧化锆泡沫陶瓷过滤板性能最佳,其容重为0.452 g/cm3,抗热震性为12次,抗压强度为1.56 MPa。 相似文献
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SiC泡沫陶瓷过滤板具有气孔率高、热稳定性好等优良性能,被广泛应用于铸钢和铸铁领域。本文主要介绍了SiC泡沫陶瓷过滤板的工艺流程,综述了国内外SiC泡沫陶瓷过滤板的生产现状。 相似文献
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介绍了飞灰陶瓷过滤棒清洗再生工艺的研究过程。实际应用情况表明,采用自主研究的清洗再生工艺,可以有效清除陶瓷过滤棒表面及滤孔中的污垢,再生后的陶瓷过滤棒达到了使用的技术要求。 相似文献
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本文简单介绍了泡沫陶瓷过滤板的制备工艺、分类及应用领域,对氧化铝材质的泡沫陶瓷过滤板喷浆料的粒度、含水率、喷浆量等因素进行了分析.对比了手动喷浆和自动喷浆的优缺点,并研究了上浆后喷浆和干燥后喷浆的利弊及适用条件,以及对泡沫陶瓷喷浆工艺做了较为全面的分析,希望能帮助泡沫陶瓷过滤板厂家进一步了解喷浆工艺在泡沫陶瓷生产工艺中的作用. 相似文献
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The experimental study was carried out to optimize the nozzle shape and dimension for the pulse cleaning of a ceramic filter candle. A bench scale unit of ceramic filter consisting of four commercial filter elements was used to measure the traces of the transient pressure around the nozzle and the overpressure in the filter cavity during the pulse-jet injection of pulse gas. Overpressure in the filter cavity is related to the pulse cleaning force. Nozzle design is concerned to increase the overpressure at the open end of filter element of pulse cleaning inlet, as well as to minimize the consumption of pulse gas. Convergent nozzle induces more secondary flow and generates higher pulse cleaning effect than straight nozzle. Nozzles of different convergent ratio (ratio of outlet to inlet diameter of nozzle) by changing the convergent angle and height were tested. The outlet diameter of convergent nozzle seriously influences the cleaning effect. The optimum convergent ratio increases with the increase of pulse gas pressure The nozzle position (distance of nozzle tip from the open end of filter inlet) is also important to decide the nozzle dimension. Nozzle of large outlet diameter accepts high pressure of pulse gas to provide large overpressure in the filter cavity of top position by applying long distance. 相似文献
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李绍武 《硫磷设计与粉体工程》2011,(6)
介绍了HTG型陶瓷过滤机的工作原理、工艺流程,以及在磷矿浆脱水应用中存在的问题及改进措施。生产运行证明陶瓷过滤机真空度高,滤饼含水率低,产量高,是一种适用于湿磨磷矿粉的高效、环保节能的固液分离设备。 相似文献
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利用高频动态压力传感器测定脉冲反吹系统中各位置的压力特性,研究了反吹压力和喷嘴孔径对压力特性的影响,提出了解决反吹不均匀的设计方案,采用过滤循环实验进行验证. 结果表明,采用相同孔径的喷嘴时,喷吹管内、喷嘴出口及过滤管内的压力特性存在较大差异,各喷嘴的反吹不均匀性随反吹压力升高而增大,反吹强度随喷嘴孔径增大而减小,喷吹管内的静压沿喷吹方向逐渐增大. 沿喷吹方向将喷嘴孔径递减能改善反吹不均匀的状况,喷嘴截面积与喷吹管截面积之比s/S对脉冲反吹均匀性的影响较大,s/S=48%~55%较佳. 相似文献
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Based on the analysis of high-speed video images, the detachment behavior of dust cake from the ceramic candle filter surface during pulse cleaning process is investigated. The influences of the dust cake loading,the reservoir pressure, and the filtration velocity on the cleaning effectiveness are analyzed. Experimental results show that there exists an optimum dust cake thickness for pulse-cleaning process. For thin dust cake, the patchy cleaning exists and the cleaning efficiency is low; if the dust cake is too thick, the pressure drop across the dust cake becomes higher and a higher reservoir pressure may be needed. At the same time there also exists an optimum reservoir pressure for a given filtration condition. 相似文献
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通过计算可沉积在膜表面的临界(最大)粒径,确定了膜表面滤饼层结构与颗粒粒径的关系,并采用不同操作条件下渗透通量的数据进行验证,确定不同粒径的超细粉体系所适合的操作压力和错流速率。 相似文献