Watertube boilers

Book1 Chapter1
STUDY
PLAY

Terms in this set (...)

A reason for preferring copper tubing in a tubular boiler is
Faster heat transfer rate
In a longitudinal drum boiler the feedwater enters the drum
In the lower part of the longitudinal steam drum
When the furnace enclosure is formed by tubes, it's called
Waterwalls
A disadvantage of the watertube or tubular boiler is
Water treatment monitoring
Place the following longitudinal drum straight tube boiler components in the correct order which would follow the path of water in the boiler starting from the feed water inlet
1. Downcomer
2.Longitudinal steam drum
3.Riser
4.Tubes
Longitudinal steam drum
Downcomer
Tubes
Riser
The bent tube boiler design allows the tubes to be attached radially on the outside of the
Shell or drum
The combustion chamber of a serpentine tube watertube boiler is
Located below the tubes
An initial problem with the tubular boiler being used as a steam unit was
Dissolved impurities forming scale on the tubes
In a large generating unit the boiler is supported from the top to allow
For expansion
A packaged tubular steam boiler often has a steel sheathing in front of the waterwall tubes due to
The erosive action of the flame
In order to keep salt concentrations within safe limits the packaged tubular steam boiler utilises
An automatic blowdown
A membrane waterwall
Consists of a metal sheeting in front of the tubes
The use of a bent tube boiler designs allows the furnace wall to be lined with tubes thereby exposing more of the heating surface to
Convection heat
Large steam generating unit are often built to an approximate height of
12-14 stories