MPS型中速辊式磨煤机制粉系统中德热力计算实例分析

Case Analysis for Heat Calculation of a MPS Medium-speed Roller Coal Mill Pulverizing System with Chinese/German Standards

理论分析了DL/T 5145—2012《火力发电厂制粉系统设计计算技术规定》中所述热力计算方法与德国标准MPS型中速磨煤机热力计算的主要区别,并通过4个实际工程案例进行对比。结果表明:造成两种标准不同的因素主要有机械热、通风率和散热损失系数,与干燥剂始端温度基本无关。

A theoretical analysis was conducted on the main difference of heat calculation ways respectively specified in DL/T 5145—2012 ＂Technical code for design and calculation of pulverized coal preparation system of fossil-fired power plant＂and corresponding German standard,and subsequently a comparison was made among 4 actual engineering cases.Results show that the main difference between above two standards lies in the aspects of mechanical energy,ventilation rate and heat loss coefficient,which basically has no relationship with the start temperature of the drying agent.