CONJUGATE HEAT TRANSFER IN THE PRODUCTION OF GLASS MICROSPHERES IN A GAS-FLAME REACTOR

M Yu Liakh,A V Akulich,P S Grinchuk

doi:10.29235/1561-8323-2018-62-3-353-363

Abstract

A model for the process of glass microsphere production in a recuperative gas-flame reactor was proposed. Based on the described mathematical model of heating and motion of particles in a high-temperature gas stream, which takes into account conjugate heat exchange between the reactor’s operating environment and the recuperator, the appropriate processes were modeled and optimized by geometric and regime parameters. The particle location time in the reactor at a temperature above 1400 °С, which was determined by data of differential scanning colorimetry, was used as an optimized charac- С, which was determined by data of differential scanning colorimetry, was used as an optimized charac- , which was determined by data of differential scanning colorimetry, was used as an optimized characteristic.As a result of optimization calculations, the reactor parameters (diameter and height, natural gas flow rate, air flow rate in the recuperator) were found, as well as regime parameters (diameter and flow rate of glass particles), under which microspheres can be formed. The information obtained can be a basis for designing an effective gas-flame reactor for production of glass microspheres.

Highlights

As a result of optimization calculations, the reactor parameters were found, as well as regime parameters, under which microspheres can be formed
which takes into account conjugate heat exchange between the reactor's operating environment
The information obtained can be a basis for designing an effective gas-flame reactor for production

Summary

Introduction

As a result of optimization calculations, the reactor parameters (diameter and height, natural gas flow rate, air flow rate in the recuperator) were found, as well as regime parameters (diameter and flow rate of glass particles), under which microspheres can be formed. П о э т о й п р и ч и н е ц е л ь и с с л е д о в а н и я з а к л ю ч а л а с ь в о п т и м и з а ц и и п а р а м е тров системы, при которых время пребывания частиц стекла в реакторе при условиях, когда ее температура выше 1400 °С Δt1400 была бы достаточной для образования полых микросфер. При увеличении температуры происходит снижение характерного времени, но следует отметить, что температура, до которой можно нагреть частицу горячим потоком дымовых газов, теоретически ограничена адиабатической температурой горения (для природного газа 1960 °С).

Results

Conclusion