Plant, Equipment and Furnace Design Set 2

Preheating the combustion air ✘ Oxygen enrichment of combustion air ✘ Preheating the fuel gas ✘ All (a), (b) & ✔

Tunnel kiln ✘ Rotary kiln ✘ Soaking pit ✘ Reheating furnace ✔

Premix ✘ Outside mixing type ✘ Rotary ✘ Diffusion ✔

Horizontal ✘ Vertical ✘ Tangential ✘ All (a), (b) and ✔

Thermal efficiency of the process ✘ Sources of heat losses ✘ Scope of reduction of heat losses ✘ All (a), (b) and ✔

Gate ✘ Butterfly ✘ Globe ✘ None of these ✔

Fans ✘ Arrangement of heating stock in the furnaces ✘ Location of outlet ports and heating & combustion devices ✘ All (a), (b) and ✔

Should be as low as possible i.e., 1 : 2 ✘ Should be 1:1 for a batch type furnace ✘ Is the ratio of maximum to minimum permissible heat input rates ✘ Is normally much more for a continuous furnace as compared to a batch furnace ✔

< 2

✘

< 5

✘

< 8

✘

< 10

✔

Glass tank furnace ✘ Open hearth furnace ✘ Cupola ✘ Reheating furnace ✔