Mathematical modeling of heating of coal particle within the space between electrodes of arc-heating reactor

Oleksandr Zhevzhyk,Leonid Kholiavchenko,Vitalii Pertsevyi,Olena Gupalo,Liudmyla Kabakova,Nataliia Morozova,Iryna Potapchuk,Serhii Davydov,A Bulat,B Liu,O Zhevzhyk,O Voloshyn,Y Kryzhanivskyi,V Heyets

doi:10.1051/e3sconf/202016800069

Oleksandr Zhevzhyk, Leonid Kholiavchenko + Show 12 more

Open Access

https://doi.org/10.1051/e3sconf/202016800069

Copy DOI

Abstract

A mathematical model of heating of coal particles that move in the initial section of a submerged gas jet within the space between electrodes of reaction chamber of arc-heating reactor is created. The model takes into account convective heat transfer and heat transfer by radiation from a sphere (particle) – circle (anode) system. The temperatures of particles on mechanical trajectory are obtained depending on particle diameters and the initial coordinate of nozzle leaving.

Highlights

Today plasma-chemical processes and equipment are widely used in the processing and conversion of dispersed materials in metallurgy, energy, chemistry, in production of construction materials and mineral processing, as well as in the waste disposal and neutralization
Depending on the methods of energy supply into the reaction space, plasmajet reactors and arc-heating reactors are distinguished. These reactors can be used to produce the synthesis gas from carboncontaining raw materials to be used in direct burning of the product and in closed cycle coal gasification technology for electricity production, in the synthesis of liquid motor fuel, in the production of reducing atmospheres in metallurgy. Some processes such as atomization of fuel in the reactor chamber, evaporation of water droplets depending on their size, evolution and combustion of volatiles, heating of gas and coke particles in the chamber have been studied in terms of gas temperatures in the reaction chamber of up to 2000 K, and the results are described in [1, 2] for the case of the gasification process in a split type reactor
The purpose of the work is to create a mathematical model of heating of coal particles in gas jet that move within the space between electrodes of reaction chamber, and to determine the final temperatures of the particles depending on their diameters and the initial coordinate of nozzle leaving

Summary

Introduction

Today plasma-chemical processes and equipment are widely used in the processing and conversion of dispersed materials in metallurgy, energy, chemistry, in production of construction materials and mineral processing, as well as in the waste disposal and neutralization. Depending on the methods of energy supply into the reaction space, plasmajet reactors (split type reactors) and arc-heating reactors (combined type reactors) are distinguished These reactors can be used to produce the synthesis gas from carboncontaining raw materials to be used in direct burning of the product (boiler plants) and in closed cycle coal gasification technology for electricity production, in the synthesis of liquid motor fuel, in the production of reducing atmospheres in metallurgy. This improves the performance of the gasification process of carbon-containing fuels, hardware intensity and capital costs

Objectives

Methods

Results

Conclusion