Online classification evaluation method, system and device for slurry quality of desulfurization system

Abstract

The invention discloses an online classification evaluation method, system and device for the slurry quality of a desulfurization system. The method comprises the steps: collecting historical operation data of related parameters of a desulfurization system and a corresponding slurry quality evaluation label, obtaining an original data sample D, and carrying out the data cleaning; carrying out steady-state screening according to steady-state judgment conditions, and carrying out standardization pretreatment; carrying out dimension reduction processing on the dimension-standardized sample BD by adopting a local preserving projection (LPP) algorithm, carrying out pattern clustering and identification on the dimension-reduced sample JD by adopting a cohesion k-means clustering method, and analyzing a clustering result to obtain a slurry quality classification evaluation library N; and obtaining a new sample S of related parameters of the desulfurization system, adding the new sample S into the steady-state operation data sample set SD for iterative calculation to obtain a dimension standardized sample BDS and a dimension-reduced sample JDS, performing mode clustering on the sample JDS, and comparing the sample JDS with a typical sample label of N in the classification evaluation library to obtain an evaluation category of the new sample S.

Description

technical field [0001] The invention relates to the technical field of power station desulfurization, in particular to an online classification and evaluation method, system and device for slurry quality in a desulfurization system. Background technique [0002] In the existing technology, the wet desulfurization system is the most widely used desulfurization system in power stations, and the limestone-gypsum wet flue gas desulfurization technology is dominant in wet flue gas desulfurization, and its main process is flue After the gas is boosted by the booster fan, it enters the absorption tower from the bottom, flows through the absorption tower to the chimney from bottom to top, and the limestone slurry is transported to the spray layer by the slurry circulation pump, and is sprayed from top to bottom through the nozzle to complete the process of desulfurization flue gas. Countercurrent contact and desulfurization reaction occurs, the reaction product CaSO3 enters the slur...

AI Technical Summary

Problems solved by technology

However, the chemical composition of the slurry in the absorption tower is extremely complex, and the deterioration of slurry quality is a frequent problem

When the quality of the slurry deteriorates, it will not only make it difficult to control the pH value of the slurry, but also reduce the desulfurization efficiency of the system, and at the same time, it will also cause problems such as difficult dehydration and substandard quality of the by-product gypsum of the desulfurization system.

In addition, the deterioration of slurry quality is likely to cause the filter screen and nozzle of the slurry circulation pump to be blocked, which will increase the flow resistance of the entire pipeline, and the impact, wear and corrosion of the deteriorated slurry on the inner shell and impeller of the slurry circulation pump will also increase. It will increase the weight and shorten the life of other equipment, so it is very important to monitor the slurry quality

At present, the judgment of the quality of the slurry is mostly through the post-test, so there is a certain delay and hysteresis. Therefore, it is urgent to develop an online and continuous monitoring method, which can monitor and evaluate the quality of the slurry in real time, and maintain the high efficiency of the desulfurization system. It is of great significance to run and prolong the working life of related equipment

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