Equipment test
Match each of the parts of the furnace to the correct name.
1 damper 2 convection section 3 shock bank 4 refractory 5 radiant tubes 6 burners
Steam is used in:
distillation column, turbines drivers, and heat exchanges
The inlet line to the lower (drum)header.
downcomer
Liquid water is separated from steam in the upper drum by which of the following methods.
dry pipes, centrifugal moisture separators, and plate dryers
A section of the boiler utilized to preheat feed water before it enters the main boiler system.
economizer section
An economizer preheats air usually by waste heat from flue gases.
false
The air register controls draft in a furnace.
false
The damper in a process furnace controls the amount of combustion air and excess oxygen in the burners.
false
A type of boiler that passes hot gases through tubes to heat up and vaporize water.
fire tube boiler
The section of the furnace that reaches the highest temperature is the:
firebox
When a section of a furnace tube gets too hot from coke beginning to form:
flame impingement
Ensuring proper air concentration is critical because:
fuel burns cleaner and hotter if air mixture is correct. fuel burns poorly and cooler if air mixture is incorrect
If flames impinge on the tubes within a furnace what is likely to happen.
hot spots will begin to form
Four draft types utilized on furnace designs are:
induced, balanced, natural, and mechanical
A steam trap that operates by opening or closing a bellows as the temperature changes. This movement opens and closes a valve.
mechanical steam trap
Most fired furnaces use:
natural gas and kerosene
Boiler load is most closely defined as a:
pants demand for steam
Furnaces are used in processes such as:
preheating process fluids
Carbon deposits are most likely to be found in the:
radiant tubes
What is the primary method of heat transfer in the firebox of a boiler? Choose one answer.
radiation
Process furnaces areinsulated by a brick-like material called ____. Choose one answer.
refractory
Flow moves in the opposite direction in these tubes.
riser and downcomer
The downcomer is connected to:
steam generating drum and mud drum
Steam that is separated from liquid water and heated to a higher temperature is called ________. This type of steam is usually used to drive turbines.
super heated
What is the purpose of a steam trap?
to remove condensate
An air preheater heats air usually by using waste heat from flue gases
true
Some furnaces and boilers are equipped with soot blowers. The purpose of the soot blower is to remove soot.
true
Scale buildup on the inside of boiler tubes is caused by dissolved solids in the boiler feed water. What can happen if the scale buildup goes unchecked?
tube rupture
Select three operating problems associated with steam generation.
tube rupture, soot buildup, and flame impingement
What is a stoker used for?
used to burn solid fuels for heat energy
There are two types of boilers. They are _____ tube and ____ tube.
water and fire
Slugs of water can damage equipment and lead to a condition known as:
water hammer
Following are the steps to take when starting up a furnace. Put them in the proper order. Each correct response is worth 1 point.
1.inspect the furnace 2.Purge any raw fuel from the furnace with air or steam 3.Light-off the pilots in the proper order 4.Light-off the burners in the proper order 5.Adjust the burner registers and the stack dampener for proper operation
What is normally the maximum rate of temperature change that should not be exceeded when a boiler or a furnace is started up or shut down?
150 per hour
An air preheater is a:
Cost saving system used to heat the air before it enters the burner
Identify each of the parts of the boiler.
a. boiler stack b. desuperheated steam c. steam drum d. super heated steam e. risers f. mud drum g. down comers economizer
Fired furnaces may have single or multiple burners mounted either in the floor or in the wall.
burner
Used to evenly distribute air and fuel vapors over an ignition source and into a boiler firebox.
burner
When coke forms on the inside of the tubes of a fired furnace how is it normally removed the majority of the time?
by introducing super heated steam to burn off the coke
Fired furnaces come in three design types, select these three types.
cabin, box,and cylindrical
Carbon deposits found inside furnace tubes:
coking
As steam flows from the boiler to the plant it begins to cool and become a liquid. What is the technical name for this material?
condensate
Tubes located above the shock bank.
convection tubes
