共查询到18条相似文献,搜索用时 62 毫秒
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利用压电式压力传感器测定了滤管外的压力波形,分析了喷吹压力、脉冲宽度等因素对滤管外压力的影响。实验结果表明,在脉冲反吹时滤管外附近区域的压力波衰减轻快,而离滤管壁一定距离后压力波则在过滤器内均匀传播。同时证明在脉冲及吹过程中,集气室对相邻滤管间相互影响具有重要作用。 相似文献
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对共用一个喷嘴和引射器的联箱式陶瓷滤管排的喷吹性能进行了实验研究并得出结论,认为扩压管式引射器动态性能优于文氏管引射器和直管引射器,且喷嘴至引射器有一最佳距离 相似文献
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陶瓷过滤器脉冲反吹系统引射性能的实验测定(Ⅰ)──喷吹气体流量的测定和分析 总被引:1,自引:1,他引:0
采用热线风速仪测量陶瓷过滤器脉冲反吹喷嘴出口的流场得到了喷吹气体流量,分析了喷吹压力和脉冲宽度对喷吹气体流量的影响。实验结果表明,喷吹气体流量随喷吹压力的增加而显著增加,而脉冲宽度的增加对喷吹气体流量的影响较小,只是增加了气体喷吹持续时间。同时证明由热线风速仪测得的一次脉冲反吹的压缩气体耗量与将储气罐排气过程简化为绝热排气过程所计算出的结果非常吻合,推荐采用绝热排气过程估算压缩气体耗量。 相似文献
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刚性过滤器脉冲反吹过程中滤管内动态压力特性 总被引:1,自引:0,他引:1
催化汽油吸附脱硫(S-Zorb)装置中反应器过滤器的脉冲反吹性能直接影响吸附剂的分离与循环。利用建立的滤管过滤性能实验装置,采用高频动态压力传感器,测定脉冲反吹过程中沿滤管长度方向不同位置处滤管内动态压力随时间的变化特性,分析了滤管长度、反吹压力和脉冲宽度对滤管内动态压力特性的影响规律。结果表明:自开口端至盲端,滤管内动态压力的压力峰值先逐渐变大后基本不变;相同反吹条件下,随着滤管长度的增加,滤管内沿长度方向各位置处的压力峰值均降低。实验范围内,1750~2000 mm滤管开口端附近的动态压力在达到压力峰值后降低为负压,并在反吹气流和脉冲压力波的共同作用下持续振荡。适当提高反吹压力以及增加脉冲宽度可以改善长滤管的反吹效果。 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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操作参数对陶瓷过滤管脉冲反吹清灰过程的影响 总被引:6,自引:0,他引:6
在由单根陶瓷过滤管组成的实验装置上,利用U形管压差计及压阻式压力传感器分别测定了过滤含粉煤灰气体时滤管内外压差和脉冲反吹时滤管内的瞬态压力. 结果表明,在进入连续稳定循环过程后,单根滤管在各个循环的清灰效率仍存在较大的波动.在过滤参数不变而仅改变反吹参数的情况下,可依据反吹压力波形正压峰值来判断清灰效率的优劣. 同时分析了重要操作参数对反吹压力波形及清灰效率的影响. 指出脉冲宽度对清灰效率几乎没有影响;在满足清灰要求的前提下,再提高反吹压力对清灰并没有明显的改善效果;而过高的过滤速度对清灰效率极为不利,会导致过滤循环操作无法正常进行. 相似文献
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陶瓷过滤器脉冲反吹系统引射性能的实验测定(Ⅰ):喷吹气体?… 总被引:1,自引:1,他引:0
采用热线风速铁瓷过滤器脉冲反吹喷同口的流场得以了喷吹气体流量,分析了喷吹压力和脉冲宽度对喷吹气体流量的影响。实验结果吹气体流量随喷吹压力的增加而显著增加,而脉冲宽度的增加对喷吹气体流量的影响较小,只是增加了所体喷吹持续时间。同时证明由热线风速仪测得的一次脉冲反映的压缩气体耗量与将储气罐排气过程简化为绝热排气过程所计算出的结果非常吻合,推荐采用绝热排气过程估算压缩气体耗量。 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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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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In the commercial utilization of rigid ceramic filters, the performance of pulse cleaning has crucial effects on the long-term stable operation. In order to get a clear insight into the nature of this cleaning process and provide a solid basis for industrial applications, the flow in ceramic candle filter was investigated. The flow in the pulse-jetspace and inside the ceramic candle is regarded as two- dimensional, unsteady, compressible flow, and numerical simulation is carried out by computational fluid dynamics. The numerical predictions of flow field are in good agreement with the experimental measurements. Effects of the candle diameter, the separation distance between the nozzle and the candle injector and the length of the candle on the flowfield have been numerically analyzed to provide the basis for the optimum design of the pulse cleaning system. 相似文献
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介绍了云南云天化股份有限公司壳牌煤气化装置过滤器在运行中出现的滤芯断裂故障情况,从气化炉温度控制、反吹气压力、反吹气温度、滤芯质量、设备负荷等方面进行了原因分析并提出了相应的解决措施和建议,希望对以后壳牌煤气化装置过滤器内件滤芯折断故障的解决有所启示和帮助。 相似文献
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本文详细介绍了泡沫陶瓷过滤器的生产工艺,并简单介绍了其过滤机理。对海绵加工、浆料调节及产品烧结等生产工序分别作了阐述,并提出了生产过滤器的技术要求和铸造使用过程中的注意事项。 相似文献