Estimation method and system for measurement properties of CEMS (Continuous Emission Monitoring System) of denitration system

Abstract

The embodiment of the invention discloses an estimation method and system for measurement properties of a CEMS (Continuous Emission Monitoring System) of a denitration system. The method comprises thefollowing steps: calculating various pre-set performance indexes of the CEMS according to a plurality of paths of measurement data of a denitration control system under standard working conditions and a dynamic operation process of working conditions to be evaluated; evaluating current measurement properties of the CEMS in the denitration control system according to the differences of all the performance indexes of the standard working conditions and the working conditions to be evaluated, wherein the standard working conditions are working condition with normal dynamic properties of the denitration control system and and the measurement data comprises an inlet NOx concentration, an outlet NOx concentration and an FGD outlet NOx concentration of a reactor of the denitration control system. The estimation method can be used for effectively evaluating the measurement properties of the CEMS, so that whether the measurement properties of the CEMS are worsened or not and the seriousness ofa worsening degree can be known, and furthermore, problems of the CEMS can be rapidly found and eliminated in time, which is conducive to ensuring and improving the denitration performance and reliability of the denitration control system and improving the control performance of the denitration control system of a thermal power unit.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of automatic monitoring of industrial pollutants, in particular to a method and system for evaluating measurement characteristics of CEMS of a denitrification system. Background technique [0002] SCR (Selective Catalytic Reduction, Selective Catalytic Reduction) technology is a treatment process for NOx (nitrogen oxides) in thermal power units, that is, under the action of a catalyst, the reducing agent ammonia or urea is injected to reduce the NOx in the exhaust gas into N2 and H2O to achieve ultra-low emissions of nitrogen oxides in industrial production. The flue gas SCR denitrification control system includes control systems such as the SCR reactor area, steam and sonic blowing, dust removal and reducing agent areas, etc. The control of the flue gas SCR denitrification system is realized by using the data acquisition system, analog control system, and sequence control system. , SC...

AI Technical Summary

Problems solved by technology

However, in the existing technology, more attention is paid to the construction of the SCR denitrification control system and the control methods of the system, and there are few or no evaluation methods for the measurement characteristics of the SCR denitrification control system, that is, there is no real-time evaluation of the CEMS measurement characteristics to detect Whether the CEMS measurement characteristics have deteriorated

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