模块式结构设计在阳光选煤二厂的应用

Application of modular structure design in Yangguang coal preparation plant NO.2

通过对阳光选煤厂原煤性质的分析,说明选煤厂入选原煤煤种复杂多变,原生煤泥含量波动较大。针对选煤一厂存在的设备台数多,煤泥水处理能力不足,循环水浓度高,介耗高等问题,提出了选煤二厂模块式结构设计的优势。从设备选型、煤泥水系统选型、产品综合回收率、自动化控制程度和经济效益5个方面对选煤一厂和选煤二厂进行了对比分析。结果表明:选煤二厂主厂房设备选型实现了集中化、大型化、单台化、系统简单化,运行成本明显降低;煤泥水系统设备选型较一厂有所扩大,系统负荷减轻,生产运行稳定、可靠;基本实现了排纯矸,压滤尾煤灰分、产品回收率明显增加;自动化控制程度明显提高;吨煤电耗、介耗分别降低了0.9 kWh和1 kg,每年节省电费108万元,节省成本120万元。最后针对选煤二厂实际运行中存在的中矸带精煤量大,总精煤灰分不稳定等问题,提出了相应的解决措施。

The analysis of raw coal characteristics in Yangguang coal preparation plant（CPP） indicates that coal types of this plant are quite complicated and variable,and the content of primary slime varys greatly.In order to solve the following problems existed in coal preparation plant No.1,such as more needed equipments,poor slurry treatment ability,high concentration of circulating water,increasing medium consumption and the like,analyze the advantages of structural and modular CPP for plant NO.2.Through comparison and analysis in the following five aspects,equipment selection,slurry systemic selection,overall recovery of products,automation control level and economic benefits,the results shows that,in plant NO.2,the equipment selection in the main building has realized the centralization,large-scale,single set and system simplification,and the operation cost has sharply reduced.Moreover,the range of equipment selection has expanded,which decrease the load of coal slurry system and guarantee production more stable and reliable.It basically realizes pure reject discharge,and dramatically increased ash content of filter press tailings and the product recovery.It also significantly improves automation control level of CPP.Power consumption and heavy medium consumption have been reduced by 0.9 kWh/t and 1 kg/t respectively, that means that have saved electric charge 1.08 million yuan and total cost 1.2 million yuan per year.Finally,put forward corresponding measures for operation problems in Yangguang coal preparation plant NO.2,such as great amounts of clean coal missing in middlings and rejects,unstable clean coal ash and so on.