Feedwater heater pressure. Indicates whether the
proper deaerating temperature can be maintained in the
Feedwater heater temperature. Shows the
effectiveness of the feedwater heater. A drop in
steam-supply pressure or insufficient venting may
cause low heater temperature.
Feed pump pressure. Indicates the effectiveness
of the boiler feed pumps. If the feedwater supply fails,
the pressure reading enables the operator to determine
whether the trouble is in the feed pumps. Pumps are
defective when the feed pump pressure reading is below
Last-pass draft. Indicates the actual draft
produced by the stack or the induced-draft fan. A
decrease in the last-pass draft with other conditions
constant indicates leaking baffles. An increase shows
gas passages are becoming clogged.
Percent CO2 flue gas. This value is a measure of
relative quantities of air supplied with fuel. It is kept at a
value that has been established as most satisfactory for
the plant, fuel, firing rate, and other related factors. In
plants not equipped with CO2 recording meters, this
value is determined with a hand gas analyzer.
Flue gas temperature. Shows the quantity of heat
leaving the boiler with flue gases. This heat represents a
direct energy loss in fuel. Dirty heating surfaces or
leakage of baffles causes high flue gas temperatures.
Excessive fouling of firesides of boilers increases draft
loss, while leaking baffles decrease draft loss. Either
condition raises the temperature of flue gas above
Fuel. Fuel oil quantities are determined by the
use of a measuring stick and tables supplied with a given
tank. Some tanks are equipped with gauges to show the
fuel volume. Always determine the quantity of fuel
used, as this represents a major operating cost.
Outside temperature. The load on a heating plant
is greatly influenced by outside temperature. Record
this temperature for comparison with steam generated
and fuel used. These comparative values are useful in
finding abnormal fuel consumption and in estimating
Makeup water. Record the quantity of makeup
water used to enable the operator to note an abnormal
increase before a dangerous condition develops. Return
all possible condensate to the boiler plant to save water
and chemicals used to treat water.
Water pressure. Indicates whether water is
Hot-water supply temperature. Insufficiently
heated water can cause scaling or deposits in a
Water softeners. Where softeners are used, a
decrease in the quantity of time used for runs between
regeneration indicates either an increase in hardness of
incoming water or a deterioration of softening
Total and average. Space is provided for
recording the total and average quantities per shift.
Steam flowmeter. The steam flowmeter
integrator reading at the end of a shift and multiplied by
the meter constant gives the quantity of steam
generated. Dividing steam generated by fuel burned
(gallons of oil) yields a quantity that shows the economy
obtained. If a plant does not have a steam flowmeter,
pumps can be calibrated for flow and a record kept of
their operating time or condensate and makeup water
can be metered.
Boiler feed pumps in service. Makes it possible
to determine operating hours and to ensure that various
pumps are used for equal lengths of service.
Phosphate, caustic soda, and tannin added. Is
valuable in keeping the correct boiler water analysis and
in determining total chemicals used.
Remarks. The Remarks column is used to record
various types of information for which space is not
provided elsewhere on the log sheet. Note irregularities
that are found during inspections, dates boilers are
drained and washed out, equipment to be checked daily,
and so forth.
Other personnel. Names of personnel
responsible for specific tasks and data must be entered
on the log sheet, if required.
Q13. Why are prewatch assumption checks
Q14. What is the next step after completing
What is the first step to be taken when cutting in
Q16. What are the two major responsibilities of
boiler operators during normal boiler