纯水支架用反冲洗过滤装置污染控制特性仿真
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摘要
针对采煤工作面纯水支架液压系统介质污染控制问题,开发了一种具有自洁净功能的自动反冲洗过滤装置,可实现正向过滤及在不拆除滤芯的前提下对滤芯上游污染物的反向清洗,分析了该反冲洗过滤装置的工作过程,应用污染控制平衡理论建立了正向过滤及反向冲洗2个阶段的污染控制模型,利用AMESim软件建立了仿真模型。仿真结果表明:在相同过滤时间内,过滤器出口污染浓度随污染重复过滤因子的增大而增大,而过滤器前后压差随污染重复过滤因子的增大而减小;当过滤器前后压差达到反冲设定压力后,仅用时2.51 s即可完成反向冲洗;过滤装置出口污染浓度可稳定在49个/mL,满足NAS9级要求,反冲洗瞬间输出流量达336 L/min,可满足支架系统使用需求。
Aiming at the dielectric pollution control in the hydraulic system of pure water support in coal mining face, an automatic backwash filtration device with self-cleaning function has been developed to achieve forward filtration and reverse cleaning of pollutants upstream of the filter core without removing the filter core. The working process of the backwash filtration device was analyzed,the pollution control model of the two stages of forward filtration and reverse washing were established by applying the pollution control balance theory, and the simulation model was established by using AMESim software. The simulation results show that the filter outlet concentration increases with the increase of pollution repeat filter factor and the pressure difference between front and rear of filter decreases with the increase of pollution repeat filter factor. When the pressure difference between the front and rear of the filter reaches the recoil setting pressure, the reverse flushing can be completed only with in 2.51 s. The exit pollution concentration of the filtration device can be stabilized at 49 null/mL,which meets the requirements of the NAS9 level. The backwash instantaneous output flow reaches 336 L/min, which can meet the needs of the bracket system.
Aiming at the dielectric pollution control in the hydraulic system of pure water support in coal mining face, an automatic backwash filtration device with self-cleaning function has been developed to achieve forward filtration and reverse cleaning of pollutants upstream of the filter core without removing the filter core. The working process of the backwash filtration device was analyzed,the pollution control model of the two stages of forward filtration and reverse washing were established by applying the pollution control balance theory, and the simulation model was established by using AMESim software. The simulation results show that the filter outlet concentration increases with the increase of pollution repeat filter factor and the pressure difference between front and rear of filter decreases with the increase of pollution repeat filter factor. When the pressure difference between the front and rear of the filter reaches the recoil setting pressure, the reverse flushing can be completed only with in 2.51 s. The exit pollution concentration of the filtration device can be stabilized at 49 null/mL,which meets the requirements of the NAS9 level. The backwash instantaneous output flow reaches 336 L/min, which can meet the needs of the bracket system.
引文
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[2]宋建勋,廉自生.乳化液自动反冲洗高压过滤站的设计与仿真[J].煤矿机械,2011,32(6):28-30.
[3]张磊,秦海初,赵东升.煤矿井下用高压自动反冲洗过滤装置的研究[J].机械工程与自动化,2013(2):112-114.
[4]耿泽昕,许春雨,宋建成,等.液压支架乳化液高压反冲洗过滤站自动控制系统开发[J].煤矿机械,2015,36(12):178-182.
[5]于忠臣,王松,吴国忠,等.压力过滤器理论反冲洗时间的确定[J].哈尔滨工业大学学报,2006,38(8):1 267-1 269.
[6]李福章,夏剑军.粒状滤料反冲洗周期和纳污量关系研究[J].应用能源技术,2012(6):13-17.
[7]王炉平,弓乐,贾瑞清.基于有效过滤比的液压润滑过滤器模型的研究[J].润滑与密封,2010,35(7):71-73.
[8]仇博.液压系统油液污染与过滤器设计[J].煤炭科学技术,2015,43(S1):117-119.
[9]夏志新.液压系统污染控制[M].北京:国防工业出版社,1992.