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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
RESPONSE SURFACE METHODOLOGY FOR PROCESS PARAMETER OPTIMIZATION OF A COAL PULVERIZER DUE TO HIGH MOISTURE CONTENT: STUDY CASE OF PECEM
Submission Author:
Natalia de Assis Brasil Weber , RS
Co-Authors:
Natalia de Assis Brasil Weber, Augusto Delavald Marques, Paulo Smith Schneider, Julian Hunt
Presenter: Natalia de Assis Brasil Weber
doi://10.26678/ABCM.ENCIT2020.CIT20-0538
Abstract
Considering the evidence of the influence of humidity on the performance of a coal-fired power plant, this research aims to answer the following questions: Which parameters of the drying process of the coal in a vertical mill have more importance to the superheated steam generator (SSG) efficiency? Does humidity (fuel and air) affect the SSG efficiency of a coal-fired power plant? To answer these questions, the Response Surface Methodology (RSM) is used to analyze and optimize the coal pulverizing system and the experimental design method used is Box-Behnken. The experiments will be performed on a model developed in the Ebsilon Professional software. The first RSM results showed that the most important parameters for the lower moisture content coal are P2, P3, and P5; for the medium moisture content coal are P2 and P5, and for the high moisture content coal are P2 and the interactions of P3*P2 and P3*P4. Then, the second RSM results showed the efficiency decreases with the increase of the humidity in the coal, but it did not change with the humidity of the air.
Keywords
coal-fired power plant, Coal Pulverizer, Response Surface Methodology (RSM), Box-Behnken Design, moisture content
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