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首页> 外文期刊>International Journal of Coal Preparation and Utilization >EVALUATION OF A PILOT-SCALE,PLATE-AND-FRAME FILTER PRESS FOR DEWATERING THICKENER UNDERFLOW SLURRIES FROM BITUMINOUS COAL-CLEANING PLANTS
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EVALUATION OF A PILOT-SCALE,PLATE-AND-FRAME FILTER PRESS FOR DEWATERING THICKENER UNDERFLOW SLURRIES FROM BITUMINOUS COAL-CLEANING PLANTS

机译：规模化清洁工厂中浓稠水流淤泥的中规模板框式压滤机的评估

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Laboratory testing was conducted to evaluate the performance of a pilot-scale, plate-and-frame filter press for dewatering bituminous coal slurries. The fully automated filter press is manufactured by T.H. Minerals and is equipped with a hydraulic system, which operates the plate and diaphragm feed pumps. The filter press is capable of achieving an operating pressure of up to 1035 kPa. The unit contains a single set of plates having a filtration area of 0.45×0.45m. Thickener underflow samples were collected from two bituminous coal-cleaning plants located in Pennsylvania. The first sample (Plant 1) was nominal -840μm and had an ash value of 39.2%. It contained approximately 34% of -25μm material with an ash value of 64.5%. The second sample (Plant 2) was nominal -150μm and had an ash value of 17.5%. It contained approximately 65% of -25μm material with an ash value of 20.9%. Testing was conducted to evaluate the effects of filter time, air-drying time, and air-blow pressure on filtrate flow, filtrate solids content, final cake moisture, and filter press unit capacity. For Plant 1, product moistures ranged from 23.5% to 25.6% with filtrate solids content ranging from 1 % to 2% solids by weight. The unit capacities ranged from 45kg/hr/m~2 to 70kg/hr/m~2. For Plant 2, product moistures ranged from 16.1% to 21.6% with filtrate solids less than 0.1% by weight. The unit capacities ranged from 117kg/hr/m~2 to 168kg/hr/m~2. In-both eases, low cake moistures were associated with lower unit capacities. The results indicate that the filter press is capable of producing handleablc filter cakes without the use of additional flocculants.
机译：进行了实验室测试，以评估中试规模的板框压滤机对烟煤浆脱水的性能。全自动压滤机由T.H.矿产，并配备有液压系统，用于操作板式和隔膜进料泵。压滤机能够达到高达1035 kPa的工作压力。该单元包含一组板，其过滤面积为0.45×0.45m。增稠剂底流样品是从宾夕法尼亚州的两个烟煤清洁工厂收集的。第一个样品（植物1）的标称值为-840μm，灰分值为39.2％。它包含约34％的-25μm材料，灰分值为64.5％。第二个样品（植物2）的标称值为-150μm，灰分值为17.5％。它包含约65％的-25μm材料，灰分值为20.9％。进行测试以评估过滤时间，风干时间和吹气压力对滤液流量，滤液固体含量，最终滤饼水分和压滤机单位容量的影响。对于工厂1，产品含水量在23.5％至25.6％之间，滤液中的固体含量按重量计在1％至2％固体之间。单位容量从45kg / hr / m〜2到70kg / hr / m〜2。对于工厂2，产品含水量为16.1％至21.6％，滤液固体含量小于0.1重量％。单位容量从117kg / hr / m〜2到168kg / hr / m〜2。两者兼具，蛋糕水分较低，单位容量较低。结果表明压滤机能够生产可处理的滤饼，而无需使用额外的絮凝剂。

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