Method for correcting online monitoring data of flue gas desulfurization device

Abstract

The invention discloses a method for correcting online monitoring data of flue gas desulfurization device. The method comprises the following steps: (1) using a chimney flue gas monitoring site as a reference point; (2) using FGD (flue gas desulfurization) on-line monitoring data to calculate an average SO2 emission concentration of the FGD outlets of two units; (3) using chimney flue gas monitoring site as the reference point, calculating a SO2 emission concentration correction coefficient of the FGD outlets; (4) using the SO2 emission concentration correction coefficient to correct the SO2 emission concentrations at the FGD outlet 1 and outlet 2 obtained by FGD collection and calculation; (5) calculating the desulfurization efficiency after correction; calculating SO2 emission of the desulfurization device; substituting the original SO2 emission concentration of the system with the corrected SO2 emission concentration at the FGD outlets; and substituting the original desulfurization efficiency with the corrected desulfurization efficiency. The method eliminates the measuring the measurement deviation between the flue gas on-line monitoring systems and solves the problem of deviation between the measure result and real situation due to bypass flue leakage, so that FGD desulfurization efficiency of units, SO2 emission concentration and emission concentration are closer to reality.

Description

technical field [0001] The invention relates to a method for correcting online monitoring data of flue gas desulfurization, which belongs to the field of online monitoring of flue gas desulfurization in thermal power plants. Background technique [0002] At present, coal-fired generating units are basically equipped with flue gas desulfurization devices, and an online monitoring system for desulfurization flue gas is installed to conduct online monitoring of the flue gas at the inlet and outlet of the desulfurization device. The measuring points of the flue gas desulfurization online monitoring device are generally installed on the original flue of the flue gas desulfurization device and the clean flue of the outlet. It is a means for the power plant to monitor the operation of the desulfurization device. The basis for scheduling, sorting, etc. At the same time, in accordance with the requirements of the competent environmental protection department, an online flue gas moni...

AI Technical Summary

Problems solved by technology

During the monitoring process, due to the influence of the sealing of the desulfurization flue gas bypass baffle, the flue gas leakage caused the unit desulfurization online monitoring data and the chimney emission monitoring data to be inconsistent, and the difference in volume data affected the actual desulfurization efficiency of the unit, SO 2 The statistics of emission concentration and emission affect the judgment of unit desulfurization effectiveness, desulfurization electricity price subsidies and energy-saving scheduling

Images