激光诱导等离子体煤炭全组分测量系统的研究  

Study on the laser-induced plasma total coal ash-forming elements monitoring system

作　　者：刘舆帅 杨永强 朱正婷 剧殿臣 时宏杰 刘峰 董爱民 LIU Yushuai;YANG Yongqiang;ZHU Zhengting;JU Dianchen;SHI Hongjie;LIU Feng;DONG Aimin(Institute of Engineering Thermophysics,China Academy of Sciences,Beijing 100190,China;Beijing Intelligent Coal M ine Co.Ltd.,Beijing 100013,China;Business-Intelligence of Oriental Nations Co.Ltd.,Beijing 100032,China;Beijing YZH Coal Engineering Design Co.Ltd.,Beijing 100013,China;Coal Processing Plant of Lvlin Energy&Chemistry Co.Ltd.,Huozhou Coal Electric Group Co.Ltd.,Huozhou 033200,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]北京英特珂玛智能科技有限公司,北京100013 [3]北京东方国信科技股份有限公司,北京100032 [4]北京圆之翰工程技术有限公司,北京100013 [5]霍州煤电集团吕临能化有限公司选煤厂,山西霍州033200

出　　处：《选煤技术》2022年第1期7-14,共8页Coal Preparation Technology

摘　　要：煤炭灰分是选煤厂生产过程中的核心指标,实时在线获得煤炭灰分对选煤厂智能化建设具有重要意义。研究从研制基础核心元器件出发,在系统集成、系统控制、光谱-灰分计算模型和算法等方面开展研究,开发了空气冷却的Nd:YAG固体激光器、高效率反射光栅光谱仪、透射光栅光谱仪和适用于高基体效应条件下的光谱成像技术,建立了在线测量的光谱处理算法和光谱-灰分计算模型,最终研制出激光诱导等离子体煤炭全组分测量系统。吕临能化选煤厂工业性试验结果表明:该系统操作简单,维护方便,工作效果稳定,系统检测结果与化验结果最大误差为1.06%,平均误差为0.373%;对于同一煤样,系统检测结果与化验结果的平均误差在0.3%以下,再现性测试结果误差低于0.2%,准确度和测量精度均符合标准规定;使用该系统指导生产后,可使月平均浮选精煤产率提高0.7个百分点,月平均浮选药剂用量减少18 g/t。Ash content of coal is a core indicator in coal washing operation of a coal preparation plant.Realization of online ash monitoring is of vital significance for development of intelligent coal preparation plant.The R&D work in this respect starts from the development of basic core elements and then ex-tends to the study of system integration,system control,spectrum-ash computational model and algo-rithms.Through the research work,the air-cooled Nd:YAG solid state laser,the high-efficiency reflec-tion spectrometer and the transmission grating spectrometer,as well as the spectral imaging technology suitable for use under conditions with high matrix effect,the spectrum processing algorithm suitable for online measuring purpose,and the spectrum-ash computational model are successively developed.Based on the research-derived achievements,the laser-induced plasma total coal ash-forming elements detection system is finally developed.As evidenced by result of industrial test at Lvlin Energy&Chemistry Compa-ny's coal preparation plant,the system is easy to operate and maintain and can yield a reliable result.The maximum deviation between the measured value and analytical value is 1.06%with an average error of 0.373%;for the measurement of the same coal sample,the average dev iation between the system-measured value and analytical value is less than 0.3%with a repetitive error of smaller than 0.2%,which are well up to the specified standard in both precision and measuring accuracy.Compared to the case before the use of the system,the average monthly yield of flotation concentrate is increased by 0.7 percentage point,and the monthly average consumption of flotation agents is reduced by 18 g/t.

关 键 词：煤炭灰分测量 激光诱导等离子体煤炭全组分测量系统 ND:YAG固体激光器 光栅光谱仪 光谱成像技术 光谱-灰分计算模型 在线实时测灰 

分 类 号：TD948.9[矿业工程—选矿]