Control method and control system for energy saving of dust removing fan for mains frequency melting furnace

Abstract

The invention discloses a control method for energy saving of a dust removing fan for a mains frequency melting furnace. The control method comprises the following steps of: (1) acquiring an image in the melting furnace in real time; (2) processing the image and extracting characteristic information; (3) judging the grade of smog concentration in the furnace according to the characteristic information; (4) judging the output frequency according to the grade of the smog concentration; and (5) controlling the rotating speed of the dust removing fan according to the output frequency. According to the control method disclosed by the invention, the rotating speed of the dust removing fan is adjusted by acquiring information about the fire brightness and background definition in the mains frequency melting furnace in real time; and energy consumption of mains frequency melting when the dust removing fan is positioned under high-speed rotating work condition for a long time is avoided. The invention further discloses a control system for energy saving of the dust removing fan for the mains frequency melting furnace, which comprises an image acquisition unit, an image processing unit and a frequency converting and speed regulating unit; the rotating speed of the dust removing fan is automatically adjusted by acquiring the information about the fire brightness and background definition in the mains frequency melting furnace in real time; energy consumption for mains frequency melting is reduced; and the labor intensity of an operator is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a control method and a control system for energy-saving of a dedusting fan of a power frequency smelting furnace. Background technique [0002] Copper is a basic material and an important strategic material for the development of the national economy, national defense and military industry. Reducing energy consumption in the smelting process is of great strategic significance for improving my country's energy utilization efficiency. Scrap copper is a raw material that does not directly depend on the development of new copper mines. The power frequency smelting technology for its smelting and recycling has been greatly promoted in recent years. Accurately controlling the energy consumption of scrap copper in the process of power frequency smelting will greatly improve copper production efficiency. The resource recycling rate and resource utilization rate are in line...

AI Technical Summary

Problems solved by technology

However, due to the lack of an effective instrument for detecting the smoke concentration of the power frequency melting furnace, the frequency conversion speed regulation of the dust removal fan is still at the stage of manual speed regulation based on the workers' visual inspection of the smoke in the furnace

Because the workers are busy with feeding, stirring, and removing slag, they cannot adjust the speed of the dust removal fan in a timely and accurate manner. At the same time, because the speed adjustment increases the actual work intensity, the workers are not motivated to frequently adjust the fan speed.

Therefore, in actual production, the dust removal fan runs at a constant high speed, and the frequency conversion speed controller becomes a decoration, which cannot achieve the purpose of energy saving

[0007] Although the constant high-speed operation of the dust removal fan can ensure the rapid discharge of the smoke from the air-introduction channel, when the smoke concentration is small, the low speed can realize the rapid discharge of the smoke; Not only the dust removal fan itself wastes a lot of electric energy, but also takes away a lot of heat for smelting and heating, prolonging the time of smelting, resulting in a huge waste of power frequency heating electric energy; at the same time, the second half of the smoke exhaust channel is in a constant high wind Pressure environment will reduce the service life of the smoke recovery bag

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