水泉选煤厂煤泥干燥系统改造实践
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摘要
为了解决水泉选煤厂煤泥干燥系统中缓冲给料机堵料和滚筒式干燥机粘料的问题,结合选煤厂生产现状,对缓冲给料机的前挡板、尾煤泥刮板机下料漏斗和电机、干燥机尾部扬料板进行改造。在对相关设备和部件改造后,缓冲给料机不再堵料,干燥机粘料次数减少;干燥煤泥水分由19.60%降至14.80%,发热量由17.60 MJ/kg提高到19.20 MJ/kg,达到了企业内定的质量指标,且干燥设备所排尾气满足环保要求。煤泥干燥系统的稳定运行,为同步处理生产系统的煤泥提供了技术保障,并为企业带来了良好经济效益、社会效益及环境效益。
Plugging-up of the buffer feeder and sticking of material inside rotary drum dryer are the problems confronted by the coal slurry drying system of Shuiquan Coal Preparation Plant.To tackle these problems,and in the light of the plant's existing operating conditions,work is made on the technical reform of the front baffle of the buffer feeder,the discharging hopper and motor of scraper conveyor,and drum dryer's tail-end material lifting plate.Since the technical transformation of the equipment and parts as listed above,there has been seen an elimination of blocking of feeder,reduced frequency of occurrence of material sticking up inside dryer,a reduction of moisture of dried product from 19.60% to14.80% and a rise of calorific value of dried product from 17.60 MJ/kg to 19.20 MJ/kg.The dried product is well up to the quality standard set by the plant.Moreover,the gas emission of the drying system can meet the environmental protection requirement.The stable operation of the drying system not only provides a technical guarantee for the treatment of the slime in step with the operation of the coal cleaning process,but also brings forth favorable economic,social and environmental benefits.
Plugging-up of the buffer feeder and sticking of material inside rotary drum dryer are the problems confronted by the coal slurry drying system of Shuiquan Coal Preparation Plant.To tackle these problems,and in the light of the plant's existing operating conditions,work is made on the technical reform of the front baffle of the buffer feeder,the discharging hopper and motor of scraper conveyor,and drum dryer's tail-end material lifting plate.Since the technical transformation of the equipment and parts as listed above,there has been seen an elimination of blocking of feeder,reduced frequency of occurrence of material sticking up inside dryer,a reduction of moisture of dried product from 19.60% to14.80% and a rise of calorific value of dried product from 17.60 MJ/kg to 19.20 MJ/kg.The dried product is well up to the quality standard set by the plant.Moreover,the gas emission of the drying system can meet the environmental protection requirement.The stable operation of the drying system not only provides a technical guarantee for the treatment of the slime in step with the operation of the coal cleaning process,but also brings forth favorable economic,social and environmental benefits.
引文
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[2]郑汝,吴伟伟.煤泥低温干燥提质技术的研究与应用[J].节能,2013,32(10):55-57.
[3]寇建玉,刘丰,王振华.大型洗选煤中心废弃物综合利用分析[J].电力勘测设计,2010(2):36-39.
[4]李丽峰.火电厂CFB锅炉掺烧环保煤泥型煤系统设计及应用分析[D].太原:中北大学,2015:1-2.
[5]邵伟,袁隆基,郭晓勇,等.440 t/h循环流化床锅炉大比例掺烧煤泥试验研究[J].热力发电,2013,42(4):89-93.
[6]徐建礼.试论煤泥干燥技术对实现低质煤泥的综合利用[J].中国化工贸易,2014(29):201.
[7]程川,何屏.煤泥利用现状及分析[J].新技术新工艺,2012(9):66-69.
[8]司玉成,杜美利.煤泥利用研究进展[J].广东化工,2017,44(4):79-80.
[9]姚文进.浅析粗煤泥的处理与利用[J].能源与节能,2015(4):176-178.
[10]施勇刚,马云龙.国内煤泥燃烧循环流化床锅炉研究现状[J].应用能源技术,2012(6):25-
[11]曹清杰.精煤泥回收创新工艺系统研究及应用[J].河南理工大学学报(自然科学版),2016,35(S2):217-219
[12]KARHTIKEYANM M,WU Z H,MUJUMDARA A S.Low-rank coal drying technologies current status and new developments[J].Drying Technology,2009,27(3):403-415.
[13]WANG M J.Land application of sewage sludge in China[J].The Science of the Total Environment,1997,197(1-3):149-160.
[14]熊树宝.水泉选煤厂洗选产品转型后生产系统的技术改造[J].内蒙古科技与经济,2009(23):102-103.
[15]李明.采用干燥技术实现低质煤泥的综合利用[J].煤炭加工与综合利用,2012(5):27-30.