矿井通风

  • 优化通风能改善健康和安全、节约大量运行成本。

    可靠的通风对矿场工人的健康和安全至关重要,能确保全部排除柴油机的微粒物质等。对于地下开采,通风运行成本在总电能成本中一般都占有很大比例。

    众所周知,使用变频器是控制矿井通风风机最灵活、最节能且维修成本最低的方法。用于控制住地面通风风机、辅助通风装置,地下增压鼓风机的空气流量,易于集成于 Ventilation on Demand (VOD) 控制系统。VLT® 和 VACON® 变频器集成多种功能,尤其适用于矿井通风风机设备。

     确保风机即使在异常工况下仍能够充分利用能量、保持稳定正常运行,包括:

    • 能量自动优化 (AEO) 和磁通优化 – 确保电动机在各种负荷下都能保持最佳磁化强度、尽可能减少电动机能耗,变频器可在电机整个运行区间内实现灵活的电机优化。在电机处于部分负荷时自动补偿功率下降因数。在各种负荷和速度下提高变频器和电动机组合的总体效率,降低运行成本。

    • 直驱风机 –VLT 和 VACON 变频器安装简便,使风机在其设计点达到最佳性能,并在低于该设计点的各种流量下启用 AEO/磁通优化功能。确保在各种负荷/流量下实现最优能效,无需电机降容,或不必要的低速运行,或另部分负荷的电机过励磁。

    • 快速启动 – 两个方向都固定旋转发动机可最大幅度减少冲击荷载、机械应力和磨损。

    • 旁路频率 – 防止设置电动机旁路频率时在某些速度下出现共振。

    • 自动降容功能 – 对于矿井通风系统,风机的持续运行非常重要。因此,通常使用冗余风机系统,某些系统的设计基础是:在低空气流量时运行优于无空气流量运行。确保有时间采取纠正措施处理异常工况。变频器都带防护功能,可保护变频器、电动机和风扇不出现过载。这些防护功能通常会阻止变频器因运行后发出警报而使通风风扇停止运行。VLT® HVAC Drive FC 102 集成许多可编程功能,使风扇在需要低负荷(低空气流量)时持续运行,并向监控系统发出警报信号。可设置这些功能以尽可能长时间阻止变频器在过温、主电源过度不平衡或主电源输入相完全断失等情况下运行。

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