Method, system and device for online classification and evaluation of slurry quality in desulfurization system

Abstract

The invention discloses a method, system and device for online classification and evaluation of slurry quality in a desulfurization system. The method includes: collecting historical operation data of relevant parameters of the desulfurization system and corresponding slurry quality evaluation labels, obtaining an original data sample D, and performing data analysis. Cleaning; Steady-state screening with steady-state judgment conditions and standardized preprocessing; Dimensionality reduction processing for dimensionally standardized samples BD using local preservation projection LPP algorithm, and agglomerative k-means clustering method for dimensionality-reduced samples JD conducts pattern clustering and recognition, analyzes the clustering results, and obtains the slurry quality classification and evaluation library N; obtains a new sample S of relevant parameters of the desulfurization system, adds it to the steady-state operation data sample set SD for iterative calculation, and obtains a dimensionally standardized sample BDS and the sample JDS after dimensionality reduction, and pattern clustering of the sample JDS, compared with the typical sample labels of N in the classification evaluation library, to obtain the 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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