Manual/automatic switching device for fan stator blades and process interlocking method for stator blades

Abstract

The invention relates to the field of automatic control of blast furnace blowers, disclosing a manual / automatic switching device and a process interlocking method for a fan stationary blade. The manual / automatic switching device of the fan stationary blade is used for receiving a signal output by a process interlocking logic unit; when the fan normal operates, the manual / automatic switching device of the fan stationary blade is positioned at the automatic level and a stationary blade servo valve outputs a signal to directly control the fan stationary blade; when a fan stationary blade control system loop has faults, a manual / automatic switching solenoid is controlled by using the process interlocking signal to be switched to a manual position; and a signal output by the stationary blade servo valve has little action, thus the fan stationary blade is operated by manually increasing or reducing buttons. According to the manual / automatic switching device and the process interlocking method for the fan stationary blade, which are disclosed by the invention, the mistuning of the fan stationary blade caused by faults of the fan stationary blade control system loop can be prevented and the fan is prevented from being surged so as to protect the fan blade; and accidents such as slag irritation and stamping of a blast furnace and the like are avoided, so that the fan stationary blade control system is safer and more reliable.

Description

technical field [0001] The invention relates to the field of automatic control of blast furnace blower. Background technique [0002] Generally, the control of the vane of the blast furnace fan is directly controlled by the output signal of the constant air volume / constant air pressure regulator or the control signal of the DCS system. There is no manual / automatic switching device for the local stationary vane; or there is a manual / automatic switching device for the local stationary vane. The switching device is only used to debug the stator blades of the fan, and does not directly participate in the process interlocking. When any equipment in the stator blade control system loop or DCS system fails, it will cause the fan stator blades to be out of adjustment, and the outlet air volume and wind speed of the fan will be damaged. The pressure will fluctuate violently, which will affect the production of the blast furnace, and may even cause damage to the stator blades of the ...

AI Technical Summary

Problems solved by technology

[0002] Generally, the control of the vane of the blast furnace fan is directly controlled by the output signal of the constant air volume / constant air pressure regulator or the control signal of the DCS system. There is no manual / automatic switching device for the local stationary vane; or there is a manual / automatic switching device for the local stationary vane. The switching device is only used to debug the stator blades of the fan, and does not directly participate in the process interlocking. When any equipment in the stator blade control system loop or DCS system fails, it will cause the fan stator blades to be out of adjustment, and the outlet air volume and wind speed of the fan will be damaged. The pressure will fluctuate violently, which will affect the production of the blast furnace, and may even cause damage to the stator blades of the fan in severe cases.

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