隔膜压滤机入料方式的研究

Research on feed ways of diaphragm filter press

介绍了单一泵送入料、高低压双泵入料和单一泵变频入料等压滤机传统入料方式的工作原理,并对其优缺点进行了分析。为了进一步提高压滤机产率,提出了高位二级入料系统新工艺,并以小康选煤厂煤泥为实验煤样对单一泵送入料方式和高位二级入料方式的应用效果进行了对比分析。结果表明:高位二级入料系统对于难过滤煤泥具有很强的适应性,与单一泵送入料方式相比,高位二级入料系统总装机功率明显减少,压滤机入料时间由40 min缩短至25 min,总循环时间由60 min降至34 min,产能提高了1.54倍,滤饼水分下降2%,入料系统吨煤泥电耗由9.26 kWh降至1.85 kWh,总体节能效果显著。高位二级入料系统配套的滤布自更生系统可实现滤板、滤布的封闭式自动清洗,而滤液清浊分排回用系统则使得清液回用,浊液回浓缩机,不但大大节约水资源,而且减轻了浓缩机负荷。

Introduce the working principles of filter presses which adopt traditional feed ways, involving single feed pump, high and low pressure two feed pumps, single frequency conversion feed pump, also analyze their advantages and disadvantages. In order to further improve yield of filter press, put forward a high level and two steps feed system,whose feed way was compared with that of single feed pump based on coal slime of Xiaokang coal preparation plant. The results show that the new system readily adapts itself to the difficult filtering slime, compared with single feed pump, total installed power has been reduced obviously, feeding time and circulation time have been decreased from 40 minutes to 25 minutes and from 60 minutes to 34 minutes, productivity of high level and two steps feed system has been increased by 1.54 times, and filter cake moisture of which has been reduced 2% , power consumption each ton coal slime has been decreased from 9. 26 kwh to 1.85 kwh. High level and two steps feed system has remarkable overall energy-saving effect. This system supporting the cloth renewable system can achieve the plates and cloth closed self-cleaning. And the filtrate identify system makes clear liquid reused and turbid liquid back to the concentrator, and greatly saves water and reduces the concentration load.