摘要:
为改善细粒煤产品水分指标偏高问题,通过试验分别研究了煤浆浓度、抽滤真空度、抽滤时间以及处理量对滤饼含水率的影响,确定了细粒煤过滤脱水的较佳工艺条件:煤浆浓度为300g/L、真空度为0.06MPa、抽滤时间为4min、细粒煤处理量为150 g,此时滤饼水分最低,为26.08%.不同种类表面活性剂对细粒煤过滤脱水助滤作用的研究结果表明:非离子表面活性剂Span-80助滤效果较好,且以煤油做溶剂所复配成的助滤剂其助滤效果明显优于单一的药剂,复配药剂作为助滤剂出现了协同效应,能更有效地降低滤饼水分,含水率较不加药剂下降6%.
Abstract:
In order to decrease the high moisture in fine coal, the tests were carried out to study the effect of concentration of coal slurry, filtration vacuum degree, filtration time on the moisture content of filter cake. The optimum conditions of dewatering of fine coal filtration were determined. The test results show that when the concentration of coal slurry is 300 g/L, the vacuum degree is 0.06 MPa and the filtration time is 4min, the fine coal processing capacity of 150 g, the lowest moisture content of filter cake is 26.08%. At the same time, the filtration effect of different types of surfactants on the dewatering of fine coal filtration was studied. The results show that nonionic surfactant Span-80 filter had the best effect, and is used for filter aid solvent mixed into the filter effect is better than single drug, drug combination as filter aid has synergistic effect that can effectively reduce the cake moisture, the water content is decreased by 6% without medicament.
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