摘要
煤泥脱水是煤炭洗选过程中的重要环节。脱水后的煤泥能够减轻运输成本,提高热值,并减少对环境的影响。利用半工业高压隔膜压滤机研究压滤压力、压滤时间、矿浆浓度和煤泥中大于0.045 mm粒级的含量对煤泥脱水效果的影响。结果表明:压滤压力的增加能够显著降低滤饼水分,提升脱水效率,在压滤时间为180 s、矿浆浓度300 g/L时,压滤压力从1 MPa增加到5 MPa,滤饼的水分从29.89%减少到23.78%,初始脱水速率从3.5 mL/s增加到8.7 mL/s。在压滤压力3 MPa、压滤时间180 s的条件下,当大于0.045 mm的粒级含量从25%增加到100%时,滤饼的水分从29.89%降低到23.78%,压滤初始脱水速率从2.6 mL/s增加到6.3 mL/s。研究结果对选煤厂现场压滤系统的操作改善提供试验基础。
Slime dewatering is an important part of the coal washing process.Dewatered slime reduces transportation costs,increases calorific value,and reduces environmental impact.In this paper,the semi-industrial high-pressure diaphragm filter press is used to study the effects of filter press pressure,filter press time,slurry concentration and content greater than 0.045 mm in slime on the dewatering effect of slime.The results show that the increase of filter pressure can significantly reduce the moisture of the filter cake and improve the dehydration efficiency,and when the filtration time is 180 s and the slurry concentration is 300 g/L,the pressure of the filter press increases from 1MPa to 5 MPa,the moisture of the filter cake is reduced from 29.89%to 23.78%,and the initial dewatering rate is increased from 3.5 mL/s to 8.7 mL/s.Under the condition of filter pressure of 3 MPa and filter press time of 180 s,when the particle size content greater than 0.045 mm increased from 25%to 100%,the moisture content of the filter cake decreased from 29.89%to 23.78%,and the initial dewatering rate of the filter press increased from 2.6 mL/s to 6.3 mL/s.The research results provide a test basis for the operation improvement of on-site filter press system in coal preparation plant.
作者
张建华
张国营
吉日格勒
孙鑫
何梦琦
马金庆
ZHANG Jianhua;ZHANG Guoying;JIRI Gele;SUN Xin;HE Mengqi;MA Jinqing(Shenhua Junneng Group Co.,Ltd.,Coal Preparation Plant,Ordos 010300,China;College of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S02期713-720,共8页
Clean Coal Technology
关键词
煤泥水
高压压滤
脱水
滤饼水分
压力
slime stone water
high pressure filtration
dehydration
cake moisture
pressure
