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针对120万吨/年催化裂化装置AV56-12轴流风机静叶漂移、卡涩的问题,分析了射流管式伺服阀在主风机静叶控制中存在的问题,简述了比例电液执行机构的优点、性能及应用情况,这种智能型比例控制系统具有控制精度高、定位准确,操作方便、能故障锁位,推力大、寿命长、安全可靠等特点。比例控制系统平稳运行已超过3年,很好地解决轴流式主风机组静叶漂移、卡涩的问题,为机组及催化装置的平稳运行做出了一定的贡献。
Aiming at the problem of stator vane drift and jam in the AV56-12 axial flow fan with a capacity of 1200000 t / a catalytic cracking unit, the problems existing in the control of main vane stator blades of the jet tube servo valve are analyzed. The advantages and disadvantages of the proportional electro-hydraulic actuator The advantages, performance and application of this intelligent proportional control system with high control accuracy, accurate positioning, easy operation, fault lock position, thrust, long life, safe and reliable. The steady operation of the proportional control system has been more than 3 years, which can well solve the problem of stator vane drift and jam as well as make a certain contribution to the smooth operation of the unit and catalytic device.