Anti-surge control method of blast furnace blower

Abstract

The invention relates to the anti-surge control of a blower and aims at providing an anti-surge control method of a blast furnace blower. The anti-surge control method comprises the steps of: 1) conducting dimensionless treatment to an anti-surge curve to obtain the anti-surge curve which is not changed with an inlet condition and a structure; 2) obtaining real-time operating parameters, making a comparison with the dimensionless value of an anti-surge point after the dimensionless treatment and determining whether a current operating point is in a safe area or not; 3) determining the distance between the current operating point and the anti-surge curve and change speed in the current dimensionless flow direction and determining proportional-integral-derivative (PID) control parameters by taking the change speed as an input valve; and 4) transmitting the PID control parameters to the controller of an anti-surge valve to realize the control over the anti-surge valve. The anti-surge control method of the blast furnace blower has the advantages that the anti-surge curve offset caused by the change of the inlet condition and the structure is eliminated and the safe operating area can be accurately judged during operation; and the problems of pressure fluctuation and energy wastage caused by a reason that the anti-surge valve is opened too large or too small because the control parameters are fixed can be eliminated.

Description

technical field [0001] The invention relates to a blast furnace blower anti-surge method. More specifically, it is anti-surge control for blast furnace blowers in ironmaking blast furnaces. Background technique [0002] The blast furnace blower is the core power equipment in the ironmaking process, and the blast furnace blower is the heart of the blast furnace equipment. The high-pressure air flow delivered by the blower is heated to 1100-1200°C by the hot blast stove, and is blown into the blast furnace through the circular air duct installed in the lower abdomen of the blast furnace through the tuyeres installed around the blast furnace. On the one hand, it supports the charging bell from the furnace top. On the other hand, molten iron and slag are formed at the bottom of the furnace through chemical reduction reaction. If the air supply is cut off, the blast furnace cannot continue to produce molten iron. At the same time, because the force supporting the charge in the ...

AI Technical Summary

Problems solved by technology

If the opening is too large and too fast, it will not only produce large flow and pressure fluctuations, which are unacceptable in the normal production of the blast furnace, but also waste energy

If the opening is too small and too slow, it cannot be guaranteed that the fan will not enter the surge area when the operating point rises rapidly

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