Define the following terms:

Question

a. Pilot
b. Stack
c. Burner
d. Firebox
e. Induced draft furnace
f. Natural draft furnace
g. Air register
h. Vertical furnace
i. Shock bank
j. Radiant tube
k. Cabin furnace
l. Radiant section
m. Refractory lining

Answer 1

a. A pilot is an initiating device used to ignite the burner fuel.
b. A stack is a cylindrical outlet, located at the top of a furnace, through which flue (combustion) gas is removed from the furnace.
c. A burner is a device with an open flame used to provide heat to the firebox; there may be one or many depending on the furnace’s size and capacity.
d. A firebox is the combustion area and hottest section of the furnace where burners are located and radiant heat transfer occurs.
e. An induced draft furnace is a furnace that uses fans, located in the stack, to pull air up through the furnace and induce airflow by creating a lower pressure in the firebox.
f. A natural draft furnace is a furnace that has no mechanical draft or fans; instead, the heat in the furnace causes draft.
g. An air register is a device located on a burner that is used to adjust the primary and secondary airflows to the burner; air registers provide the main source of air entry to the furnace.
h. A vertical furnace is a type of furnace that provides even temperature control to process fluids.
i. A shock bank is a row of tubes (shock tubes) located directly above the firebox in a furnace that receives both radiant and convective heat; it protects the convection section from exposure to the radiant heat of the firebox.
j. Radiant tubes are tubes located in the firebox that receive heat primarily through radiant heat transfer.
k. A cabin furnace is a cabin-shaped furnace designed to heat process fluids or to generate steam.
l. The radiant section is the lower portion of a furnace where heat transfer is primarily through radiation.