A low-cost collaborative removal modeling and optimization method for pollutants in a coal-fired power plant

Abstract

A low-cost collaborative removal modeling and optimization method for pollutants in a coal-fired power plant includes collecting operation parameters and related variable of each pollutant removal device, analyzing energy consumption and / or income generated in each pollutant removal process, and establishing operation cost models of denitrification, desulfurization and dust removal; establishing acollaborative model of pollutant removal, which includes three sub-disciplinary models and one system model. The three sub-disciplinary models are a denitrification sub-disciplinary model, a desulfurization sub-disciplinary model and a dust removal sub-disciplinary model. The objective function of the system-level model is to minimize the sum of the costs of denitrification, desulfurization and dust removal, and the objective function of each sub-discipline level is added to the system-level objective function as a penalty term. A dynamic penalty function collaborative optimization algorithmis adopted to optimize the pollutant collaborative removal model, and the operation parameters of each device that make the system operation cost lowest under the condition of meeting the emission standard are solved.

Description

technical field [0001] The invention relates to the field of emission reduction of coal-fired flue gas pollutants, in particular to a modeling and optimization method for low-cost collaborative removal of pollutants in coal-fired power plants. Background technique [0002] With the continuous improvement of environmental protection requirements, the ultra-low emission system of pollutants in coal-fired power plants (referred to as the environmental protection island) is also constantly updated and improved. In a typical environmental protection island process, key pollutant removal devices mainly include denitration devices (SCR, Selective Catalytic Reduction), dry electrostatic precipitators (ESP, Electrostatic Precipitator), wet flue gas desulfurization devices (WFGD, Wet Flue Gas Desulfurization) And wet electrostatic precipitator (WESP, Wet Electrostatic Precipitator). The SCR denitrification device uses the selective reduction function of ammonia gas on nitrogen oxides...

AI Technical Summary

Problems solved by technology

In the process of reducing coal-fired flue gas pollutants, flue gas denitrification, desulfurization, and dust removal devices have synergistic removal effects, which belongs to the field of multi-model complex system optimization, while common pollutant removal models only consider the main pollutants of each system. Removal, there is no modeling analysis on the effect of collaborative removal of each system, and there is no effective overall collaborative treatment method, so it is difficult to achieve low-cost and efficient removal of coal-fired flue gas pollutants

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