PARAMETRIC STUDY OF THE NON-PREMIXED COAL COMBUSTION IN FURNACE FOR HEAT TRANSFER AND EMISSION CHARACTERISTICS

Satish Kumar Dewangan,Vivek Deshmukh,Moode Praveen Kumar Nai̇k

doi:10.18186/thermal.833556

Abstract

Steady-state turbulent non-premixed combustion of pulverized coal has been modeled in the two-dimensional furnace. Pulverized coal of three different types, low volatiles coal, medium volatile coal and high volatile coal, has been considered. The coal is injected through the center of the furnace and air is being supplied with two inlets (top inlet and bottom inlet) at different velocities. Taking advantage of the symmetry, only one half of the domain is considered. Results have been validated with the experimental data for furnace temperature distribution. Effect of variation of parameters such as top air velocity, bottom air velocity, air temperature, furnace wall temperature and mass flow rate of coal are discussed for all three different types of coal. The effect of these various parameters has been discussed upon peak temperature inside the furnace, heat transfer to/from the system to surroundings and emission of gases like compounds of NO, CO and CO2. The analysis has been carried out using Ansys-Fluent software.

Highlights

In the present day, energy scenario coal stands as the main source for power generation and process industries.Effective utilization of the thermal content of the coal depends primarily upon its proper combustion
Considering the same, present investigation have been focused on the analysis of the effect of different parametric variation on different parameters for different types of coal viz., low volatiles, medium volatile and high volatile coal and comparison between them
Effect of the furnace wall temperature variation on peak temperature inside the furnace and total heat transfer rate to/from the system for different air temperatures for different types of coal are shown in figure and figure

Summary

Introduction

Energy scenario coal stands as the main source for power generation and process industries.Effective utilization of the thermal content of the coal depends primarily upon its proper combustion. Based on the above-detailed literature review of investigations of different authors, it was found that combustion analysis of different types of coal, comparison between them and effect of parametric variation on different parameters like temperature, heat transfer rate, emission of gases, etc.

Results

Conclusion