A method and system for optimal control of wet desulfurization and oxidation fan

Abstract

The invention discloses an optimization control method and system for a wet desulfurization oxidation blower, and relates to the technical field of wet desulfurization. The method includes: constructing a sample data set based on desulfurization historical data and the oxidation rate of limestone slurry; using the sample data set to perform ANN neural network model Training and optimization; input the desulfurization data at the current moment into the optimized ANN neural network model to obtain the predicted value of the oxidation rate of limestone slurry; determine the total amount of sulfurous acid coefficient at the current moment according to the predicted value of the oxidation rate of limestone slurry; judge whether the current moment is full During the load operation period; if yes, then control the opening or closing of the oxidation fan according to the operating state of the oxidation fan at the current moment; if not, control the opening or closing of the oxidation fan according to the total amount of sulfurous acid coefficient at the current moment. The invention can significantly reduce the energy consumption of the oxidation blower on the premise of ensuring sufficient oxidation under all working conditions.

Description

technical field [0001] The invention relates to the technical field of wet desulfurization, in particular to a method and a system for optimal control of a wet desulfurization and oxidation fan. Background technique [0002] At present, the limestone-gypsum wet desulfurization process is mostly used in coal-fired power plants. This process has the advantages of high desulfurization efficiency, mature technology and wide application. The wet desulfurization reaction process is a gas-liquid reaction. During the reaction process, oxygen needs to be introduced into the tower to oxidize the sulfite in the slurry to sulfate, so as to promote the effect of limestone slurry on SO in the flue gas. 2 absorption and improve desulfurization efficiency. This process is equipped with at least one oxidizing fan, and the oxidizing fan is equipped with a power frequency motor, which runs at 100% load under any working condition. However, in the desulfurization design, a certain margin is u...

AI Technical Summary

Problems solved by technology

However, in the design of desulfurization, a certain margin is usually set, and the original SO 2 The concentration and flue gas volume are both lower than the design value, and the load changes will also occur when the unit is running. At the same time, there is no mature online measuring instrument for sulfite, which leads to waste of energy consumption of the oxidation fan.

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