A method for controlling the air volume of a blower

Abstract

The invention relates to a method for controlling the air volume of a blower, which proposes for the first time the idea of ​​using the air volume at the inlet of the blower to automatically control the stator blades, and provides a calculation method for the air volume at the inlet, which can accurately use existing measuring devices that are all indoors , The measurement signal that is less restricted by environmental factors is used to calculate the inlet air volume, to achieve the same measurement effect as the outlet air volume, and to improve the stability and automatic input rate of the air volume automatic control loop.

Description

A method for controlling the air volume of a blower technical field The invention relates to a control method, in particular to a control method for stably supplying air to a blast furnace by controlling the air volume at the inlet or outlet of a blower. Background technique The blower is a power station that uses a gas compressor to pressurize the atmosphere to supply the air required for blast furnace smelting. When the blower supplies air to the blast furnace, stable air supply is very important for blast furnace tapping. Production experience shows that a constant air volume into the furnace is beneficial to the blast furnace to maintain the normal falling speed of the charge, uniform combustion, and active hearth, which is an important condition for the stable, high-quality and high-yield of the blast furnace. Therefore, the use of constant air volume automatic control is a necessary measure to improve the quality of air supply. Most domestic blast furnace blowers a...

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Problems solved by technology

The devices and control methods used in the above two patents have been widely used in blower units, but they have not solved the problem that the measuring device is susceptible to environmental influences and signal distortion, causing fluctuations in the control loop, resulting in sudden changes in the air supply volume of the blast furnace and even causing the blower unit to enter surge running technical problems

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