Accurate predication control and energy saving system and method in wet-process desulfurization technology

Abstract

The invention relates to an accurate predication control and energy saving system and method in a wet-process desulfurization technology. The accurate predication control and energy saving system comprises a field instrument signal acquisition system, an outlet concentration predication model, an optimization control system of an executing mechanism, and a continuous adjustment system of the executing mechanism, which are communicated in sequence, wherein the field instrument signal acquisition system is connected with a desulfurization tower; the field instrument signal acquisition system iscommunicated with the optimization control system of the executing mechanism; the continuous adjustment system of the executing mechanism is communicated with the field instrument signal acquisition system. According to the accurate predication control and energy saving system, intelligent control of a desulfurization process is realized by utilizing model predication and optimization calculation;a control level is improved and stable operation of the system is ensured; meanwhile, the energy consumption is reduced and the cost is reduced, so that energy saving and efficiency increasing of a wet-process desulfurization technology system are realized; the accurate predication control and energy saving system and method are applicable to fields adopting the wet-process desulfurization technology, such as thermal power plants, steel works and industrial coal-fired boilers.

Description

technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, and in particular relates to an accurate predictive control and energy saving system and method in a wet desulfurization process. Background technique [0002] In recent years, air pollution problems such as smog have occurred frequently, and people are paying more and more attention to the air environment and pollution problems. Thermal power plants, iron and steel plants, coal-fired industrial boilers and other fields with large total flue gas emissions have become the focus of national air pollution control. Taking thermal power plants as an example, the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China issued the "Emission Standards of Air Pollutants for Thermal Power Plants" (GB 13223-2011) in 2011, requiring coal-fired boilers in thermal power plants to ex...

AI Technical Summary

Problems solved by technology

[0005] 1. The desulfurization system of the desulfurization tower is a typical multiple-input multiple-output (MIMO) system, and due to the time-lag and nonlinear characteristics of the system, the traditional control effect is not ideal;

[0006] 2. The traditional strategy of controlling the number of slurry circulating pumps and oxidation fans is discrete, which often leads to a dilemma in the selection of control strategies: pumps that are turned on less can not meet the emission limit requirements, and more pumps that are turned on will cause power consumption. waste of

[0007] 3. In the process of industrial operation, the parameters of the inlet of the absorption tower change, and the speed of the circulating pump can only keep running at high speed, which will cause waste of electric energy under low load of the system; similarly, the oxidation fan will also be turned on. Can only keep running at high speed all the time, resulting in waste of electric energy

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