洁净煤技术
潔淨煤技術
길정매기술
Clean Coal Technology
2015年
5期
35-37,41
,共4页
自动采样系统%采样偏差%煤样损失%采样精度
自動採樣繫統%採樣偏差%煤樣損失%採樣精度
자동채양계통%채양편차%매양손실%채양정도
automatic sampling system%sampling deviation%coal sample loss%sampling precision
为了提高自动采样系统的采样精度,分析了斜沟选煤厂自动采样系统存在的问题,并提出改造措施,最后对自动采样系统进行偏差分析,验证改造效果. 结果表明,自动采样系统存在故障率高、卡堵严重、系统偏差大等问题,通过调整采样系统初采刮煤板衬垫和输送带架托辊位置,加强设备维护,调节采样系统中二级采样下料口处挡煤板为倾斜45 °的导流板,调节输送带中部平煤高度和输送带运转速度等措施对选煤厂自动采样系统进行改造. 改造后自动采样系统总均方差为0. 313 ,提高了采集煤样的代表性.
為瞭提高自動採樣繫統的採樣精度,分析瞭斜溝選煤廠自動採樣繫統存在的問題,併提齣改造措施,最後對自動採樣繫統進行偏差分析,驗證改造效果. 結果錶明,自動採樣繫統存在故障率高、卡堵嚴重、繫統偏差大等問題,通過調整採樣繫統初採颳煤闆襯墊和輸送帶架託輥位置,加彊設備維護,調節採樣繫統中二級採樣下料口處擋煤闆為傾斜45 °的導流闆,調節輸送帶中部平煤高度和輸送帶運轉速度等措施對選煤廠自動採樣繫統進行改造. 改造後自動採樣繫統總均方差為0. 313 ,提高瞭採集煤樣的代錶性.
위료제고자동채양계통적채양정도,분석료사구선매엄자동채양계통존재적문제,병제출개조조시,최후대자동채양계통진행편차분석,험증개조효과. 결과표명,자동채양계통존재고장솔고、잡도엄중、계통편차대등문제,통과조정채양계통초채괄매판츤점화수송대가탁곤위치,가강설비유호,조절채양계통중이급채양하료구처당매판위경사45 °적도류판,조절수송대중부평매고도화수송대운전속도등조시대선매엄자동채양계통진행개조. 개조후자동채양계통총균방차위0. 313 ,제고료채집매양적대표성.
To improve sampling precision of sampling system,the automatic sampling system was transformed and the effects was analyzed through variance analysis. The system had the problems of high failure rate,frequent blockage and large deviation. The transforming meas-ures were that adjusting the position of squeegee gasket and conveying belt roller,improving maintenance frequency,setting the angle of guide plate at feed opening of secondary sampling process to 45°,regulating coal thickness in the middle of conveying belt and speed of conveying belt. After transformation,the total mean square error of system was 0. 313%.
