what are the 4 boiler systems
what does the feedwater system supplies
suitable water to the boiler at the temper-ature and pressure needed to sustain the steaming cycle
what does the fuel system supplies
fuel in the proper condition for the combustion process.
what does the draft system provides
provides air for combustion and discharges the gases of combustion into the atmosphere.
what does the steam system does
controls and directs the steam to the point where its energy is used for process operations, heating, or the generation of electricity.
vapor that forms when water is heated to its boiling point
If the pressure controls fail, what is the last resort to control pressure in the boiler
the safety valve
what kind of steam contains more heat energy superheated steam or saturated steam
when a steam header is used
when multiple boilers are in battery
Any time there is a reduction in steam pressure through a pressure-reducing station, there must be a ___to protect the devices designed to operate at the reduced pressure.
water supplied to a boiler.
_____protect boilers by preheating the feedwater to remove most dissolved gases.
Water weighs approximately
where deaerator tank is located
above the feedwater pumps
Each feedwater pump has its own _____to prevent hot water from the boiler from backing up if the check valve located close to the boiler fails.
what valve is closest to the boiler in the feedwater line
the stop valve
in the feedwater line why the stop valve is closest to the boiler
so that the check valve can be repaired without draining the boiler
A fuel system is
a boiler system that provides fuel for combustion to produce the heat needed to evaporate water into steam
Natural gas leaks must be located by
qualified in plant personnel or a gas company representative.
what is vaporstat
is a safety switch between the manual reset
valve and zero gas governor
In a low-pressure gas system, the rate of combustion is controlled by
the amount of air supplied to the venturi.
A typical high-pressure gas system is sized at about
____btu/hr to _____ Btu/hr
2,000,000 Btu/hr to 84,000,000 Btu/hr
what does the gas-pressure regulator does
controls the gas pressure supplied to the burner