A chemical solution to a chemical problem
Flue side fouling causes heat resistant bonded deposits on
the heat transfer surfaces of the boiler. The heat transfer rate is reduced and
the boiler must operate for a longer period to generate the same output, using extra fuel.
Prevention and control of these deposits using SAPEC fuel
treatment achieves a significant fuel saving in addition to the savings
resulting from easier and less frequent boiler cleaning.
The SAPEC treatment is injected into the combustion zone only.
Unlike some products, the treatment is too heavy to be carried in the flue
gases and remains in the combustion zone.
The boiler fouling
Reduction in heat
Increase in fuel
Trials conducted with the assistance of British Coal
demonstrated that using SAPEC fuel treatment could produce the following
- reduce deposit build up from 2.5mm
- reduce carbon deposit content from
19% to 6.8%
- increase the period between
cleaning from 330 hours to 700 hours
Controlled test ash analysis using the SAPEC fuel treatment
bonded deposits became detached from flue-side
heat transfer surfaces and were easy to remove
- No bonded deposits were formed on
the flue-side heat transfer surfaces subsequent
to SAPEC treatment
- Deposits in the SAPEC boiler were softer and lighter in colour than those in the untreated
- The carbon content of the deposits
were as much as 64% lower in
the SAPEC treated boiler than in the control boiler
- Clinker formations in the ash did
not fuse into hard slag and broke
treated boilers doubled operating
periods yet still had a minimum of 50% less deposition on the heat
In South Africa,
SAPEC has helped users achieve grade A performance from grade B coals.
This can represent a cost reduction of up to 25% with no difference in
In one major UK manufacturer, boiler operating periods were increased by 50% as a
direct result of using SAPEC.