การวิเคราะห์ปัจจัยที่ส่งผลต่อการเผาไหม้เชื้อเพลิงของหม้อกําเนิดไอน้ำแบบท่อน้ำ ระบบสโตกเกอร์สําหรับโรงไฟฟ้าชีวมวล

Abstract

This research focuses on factor analysis for biomass combustion of traveling grate stoker boiler. The regression showed that the moisture content, fuel feed rate, air feed rate, boiler pressure, and boiler temperature affect high-pressure steam production rate, excess oxygen percentage, NOx content, and chimney temperature. By using stepwise quadratic regression for high pressure steam production rate and excess percentage of oxygen and using full quadratic regression for NOx content and chimney temperature, the R – Squared Adjusted: (R2adj) of high pressure steam production, excess percentage of oxygen, NOx content and chimney temperature were 95.60%, 90.60%, 47.21% and 60.51% respectively. The optimum factor was determined using the response optimizer function. It was found that the high-pressure steam production was increased from 91.941 t/h to 100.2877 t/h as a 9.078% improvement. The excess oxygen percentage was decreased from 9.226% to 7.7639% as a 15.848% improvement. Also, the NOx content improved 37.768% by increased from 118.870 ppm to 163.7648 ppm. Furthermore, the chimney temperature improved 8.369% by increased from 158.160 ºC to 171.3961 ºC. From this regression model, it is possible to predict the optimum conditions of biomass fuel humidity, fuel feed rate and FD fan feed rate of biomass power plant based on historical production data. It can be used in this biomass power plant production in the future and also applied for the same chain biomass power plant.