煤粉输送的稳定性和煤循环.pdfVIP

Coal line stability and coal circulation 煤粉输送的稳定性和煤循环 Advanced SCGP operating Training CONFIDENTIAL December 2010 1 Agenda Scope范围 Equipment overview 粉煤系统设备概述 Installation commissioning guidelines速度计密度计安装试运行指导 Coal Circulation 煤循环 CONFIDENTIAL December 2010 2 Scope范围 Summarize experience from commissioning of the coal mass flow measurement system (CMFMS) 煤流量测量系统运行和试车的经验综述 Provide overview of encountered difficulties and possible solutions 遇到的问题和可能的解决方案 Guidelines shall be used in addition to the normal installation manuals as provided by the equipment vendors. 密度计速度计的调试基于设备供应商提供的安装手册 Coal circulation and instrument calibration is dealt 煤循环经验分享和测量校正。 CONFIDENTIAL December 2010 3 Importance of stable coal flow 煤流量稳定的重要性 To ensure gasification conditions are within operating window, to prevent: 确保气化在运行窗口中, 以防止  Temperature excursions 温度波动  SGC inlet blockage SGC入口堵  Slag tap blockage 渣口堵塞 To prevent local over firing / fluctuating heat loads, which can cause damage to: 防止局部过热/热负荷波动，导致以下毁坏  Coal burners 煤烧嘴  Coal burner muffles 烧嘴罩  Coal feed line and associated equipment (aerators, instrumentation, valves, etc) 煤线 及相关设备（通气锥，仪表，阀门等） CONFIDENTIAL December 2010 4 Parameters affecting coal line stability 影响煤线稳定性的因素 1. Coal requirements: 对煤的要求: a. Ensure no dirt and foreign material in pulverized coal 确保粉煤中 没有杂质和异物 b. Ensure pulverized coal out of coal mill within right PSD and moisture content range, typically particle size (d5μm 5%wt) moisture content ( 1-2 %wt) 确保磨好的粉煤具有正确的颗粒分布和 水分含量, 通常颗粒分布为(d5μm 5%wt), 水分含量在( 1-2 %wt) c. Not using too soft coal (HGI 100) 不要使用过于软的煤中(可磨系 数100) d. Ensure sufficient tracing and insulation, especially V120