The design of the furnace consists of a cylindrical shell constructed from steel. The inner walls are lined with a refractory brick.
The furnace has only a radiant sec-tion which contains two rows of tubes situated around the wall of the furnace.
Six burners are placed at the bottom of the of the furnace and arran- ged in a circular way to maintain an even spread of heat.
Tubes inside the furnace are arranged in tow rows around the wall with centres forming an equilateral triangle shape.
The front row and back row tubes are connected to main feed supplier by two cylindrical rings.(fig 4.11) The front ring supplies the front row tubes and the back ring supplies the back row tubes.
The cylindrical rings are connected To each tube from the top.(fig 4.12) The front row and back row tubes are connected also to two cylindrical rings from the bottom which collects the product and transfer it to the main
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