Outlet smoke temperature control system and method for converter dry method dust removing evaporative cooler

Abstract

The invention provides an outlet smoke temperature control system for a converter dry method dust removing evaporative cooler. The system comprises a cooling water flow adjusting valve, an outlet temperature detecting device detecting the outlet smoke temperature of the evaporative cooler, and a fuzzy controller. The fuzzy controller divides the converter dry method dust removing process into a first stage and a second stage, the one-dimension fuzzy control rule is used for controlling the aperture of the cooling water flow adjusting valve at the first stage, and the at least two-dimension fuzzy control rule is used for controlling the aperture of the cooling water flow adjusting valve at the second stage. In the first stage starting from oxygen blowing of a converter to rising of outlet temperature to the stable state, the one-dimension fuzzy control rule is used for controlling the aperture of the cooling water flow adjusting valve according to the difference value between the outlet temperature and the set outlet temperature. At the second stage from the stable state to lowering of the outlet temperature to the specified temperature of a dust remover, the at least two-dimension fuzzy control rule is used for controlling the aperture of the cooling water flow adjusting valve according to multiple parameters, wherein the multiple parameters at least include the difference value and the outlet temperature rising rate. The system is easy to control, high in precision and capable of saving cost.

Description

technical field [0001] The invention relates to the technical field of converter dry dedusting, and more specifically, to a system and method for controlling the temperature of flue gas at the outlet of a converter dry dedusting evaporative cooler. Background technique [0002] Converter dry dust removal is to cool the flue gas generated by the converter during the smelting process to about 1000°C through the vaporization cooling flue, and then introduce it into the evaporative cooler, and cool the converter flue gas at about 1000°C to about 250°C by atomizing and spraying water. Electrostatic precipitators. If the cooled flue gas temperature is too high, it will affect the service life of the electrostatic precipitator, and if it is too low, the wet ash will stick to the wall of the evaporative cooler. The traditional adjustment mode calculates the water injection volume based on the flue gas flow rate and the flue gas temperature difference between the inlet and outlet of...

AI Technical Summary

Problems solved by technology

If the cooled flue gas temperature is too high, it will affect the service life of the electrostatic precipitator, and if it is too low, it will cause wet ash to stick to the wall of the evaporative cooler

The traditional adjustment mode calculates the water injection volume based on the flue gas flow rate and the flue gas temperature difference between the inlet and outlet of the evaporative cooler for PID adjustment. Well adapted to the working conditions of each site

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