Design of Chamber in Continuous Furnace for Uniform Temperature Distribution

Abstract

Chambers in a continuous furnace were designed. A chamber consists of inlets and outlets of nitrogen gas which is used to discharge burned gas and heating pipes (HP) which are used to keep temperature of fired materials at 1,300 ℃. Design variables were numbers of inlets and outlets, distance between floor and lower HP (h1), distance between lower HP and fired materials (h2), distance between fired materials and upper HP (h3), temperature of HP, numbers of HP and distance between HP. The numbers of inlets and outlets were determined so that nitrogen gas formed a laminar flow for efficient discharge. All other design variables were determined so that temperature of fired materials is as uniform as possible near 1,300 ℃. Chambers were produced and temperature was measured at 21 points using thermocouples. The largest deviation from 1,300 ℃ was less than ±2.2 ℃.