Re: Methods of Improving Boiler Efficiency

On Feb 9, 1:48 am, ellis gibb <epnxrkohn...@xxxxxxxxx> wrote:
With the rising cost of fuel prices, industries that use steam boilers
for heating or power generation are hard pressed to operate at peak
efficiencies.
While steam consumption, leakages, and other heat transmission losses
can contribute to the overall energy bill, this article focuses on the
heart of the steam generator - the boiler.
Controlling the boiler is of utmost importance in any steam generation
energy saving program. Below are some ways to improve boiler
efficiencies:

Reducing excess air
Installing economizer
Reducing scale and deposits
Reducing blow down
Recovering waste heat from blow down
Stopping dynamic operation
Reducing boiler pressure
Operating at peak efficiency
Preheating combustion air
Switching from steam to air atomization
Switching to lower cost fuel

Reducing Excess Air
By far the most common reason for energy inefficiencies in a boiler
can be attributed to the use of excess air during combustion at the
burners. When there is more air than is required for combustion, the
extra air becomes heated up and is finally discharged out to the
atmosphere. However, there are reasons for putting in some extra air
for combustion - to compensate for imperfect burner fuel-air mixing
conditions, air density changes, control system "slop", burner
maintenance, fuel composition and viscosity variation, and imperfect
atomizing steam or air controls for burners....

http://groups.google.com/group/waterforfueld

What is all this about. Boiler efficiencies have been known about
forever. They always try to reduce these inefficiencies...this is
nothing new. The biggest stoppage on efficiency is pollution control
equipment, like selective catalytic converters, now required on coal
and gas plants. Reduce NOx, increase heat rate...no two ways about it.

David
.

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