Page 33 - Boiler plant and distribution system optimization manual

18 Boiler Plant and Distribution System Optimization Manual

HIGH EFFICIENCY BOILER OPERATIONS

In this book you will find a chapter with over
60 ways to improve boiler efficiency, the follow-
ing list contains the key items to reducing the en-
ergy costs of boilers.

THE kEy TO
EFFICIENT BOILER OPERATIONS

1. [2M] Measure and Manage. Change
Figure 1.20—The turndown ratio of a boiler is from an operational to management
important for efficiency and operations. If a boiler philosophy.
has to cycle on and off because of low load conditions
energy will be lost during the shutdown and purge 2. Operate with minimum excess air
cycles before and after the firing sequence. levels.

3. Reduce boiler exhaust temperature
industrial applications allows them to have a turn- to minimum levels corresponding
down around 4 to 1. Large industrial boilers must to fuel sulfur content.
respond to large demand requirements and chang-
es so a large turndown is desirable. 4. Capture latent heat energy from
boiler exhaust with condensing heat
recovery technology.
BOILER CASUALTIES

The insurance companies insuring boilers
and property are very interested in the causes of
boiler casualties as they have millions of dollars
at risk in many plants. So, when a major loss oc-
curs, they investigate the cause very thoroughly.
Here is the result of one such study:

BOILER CASUALTIES

Percentage Cause
%
54 Maintenance
10 Operational
7 External
5 Construction
4 Design
4 Application
2 Repair
14 Undetermined