Wet desulphurization on-line pH meter and working method thereof

Abstract

The invention discloses a wet desulphurization on-line pH meter and a working method thereof, and aims to solve the problems of abrasion, scaling and the like of an existing power station coal-fired unit limestone-gypsum wet desulphurization process slurry pH meter, which affect the accuracy of the pH value of desulphurization slurry. The wet desulphurization on-line pH meter comprises a desulfurization slurry inlet pipe, a desulfurization slurry inlet pipe electric automatic valve, a desulfurization slurry cyclone, a desulfurization slurry underflow slurry discharge pipe, a cyclone slurry supernatant discharge pipe, a desulfurization slurry supernatant reservoir, a sleeve, a flushing water inlet pipe, a flushing water inlet pipe electric automatic valve, a waste liquid discharge pipe, a desulfurization slurry pH value sensor and a signal transmission line. A desulfurization slurry pH value display, a partition plate and an overflow pipe improve the accuracy and reliability of desulfurization slurry pH value data.

Description

technical field [0001] The invention relates to an on-line pH meter for wet desulfurization and its working method. Background technique [0002] Large-scale power plant boilers at home and abroad basically adopt the limestone-gypsum wet desulfurization process in order to meet the emission limit requirements of air pollutant sulfur dioxide. During the operation of this process, the pH value of the desulfurization slurry is mainly concerned, and its value directly affects the emission concentration of air pollutants at the outlet of the desulfurization system. [0003] At present, the limestone-gypsum wet desulfurization process adopted in the desulfurization process of large-scale power plants, the desulfurization slurry pH meter and the density meter are generally placed in the same external device, which can basically meet the operation requirements of the desulfurization system in the initial stage of operation, but with the increase of operating time , due to the probl...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies existing in the prior art, aiming at the problems such as wear and scaling of the slurry pH meter in the limestone-gypsum wet desulfurization process of the existing power station coal-fired unit, which affects the accuracy of the pH value of the desulfurization slurry, and Provides an online pH meter for wet desulfurization, which improves the accuracy and reliability of the pH value data of desulfurization slurry

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