Energy Plants for Biomass Fuel
Today's plant for the conversion of biomass fuel into energy should
be designed to meet the stringent technical, environmental and financial
demands of tomorrow.
Combustion Chamber for optimum performance
Saxlund International has more than 40 years experience in the design
and construction of biomass fuel energy plants. Today's environmental
requirements
have made efficient, complete combustion vital to a successful installation.
Saxlund has participated in an ongoing research and development
program with KTH (Royal Institute of Technology) to optimize the
combustion process.
This technology has resulted in a new furnace geometry that achieves
complete
combustion while meeting all environmental emission requirements.
Patented fuel feed system
A fundamental requirement for ensuring optimum combustion in grate
fired systems
is that the fuel be accurately metered across the entire width of
the moving grate system at varying loads. Saxlund International
has applied its vast experience
with bulk solids handling techniques to this challenge. The result
is a new patented grate feeding system that minimizes the possibility
of "burn through" and associated uncontrolled air supply
to the grate.
The feeding system design is dependent upon several factors:
- Fuel type
- Fuel moisture content and range
- Particle size
- Grate width
- Furnace output
The system can be optimized by incorporating the following:
- Simplex or duplex design
- Single or double fire protection dampers
- Surge capacity in the fuel chute
- Water cooled feeder
- Water cooled frame
Saxlund International AB har utvecklat ett nytt styrsystem för
inmatningen i
kombination med roströrelsen.
The Reciprocating Grate
Saxlund International has many years of experience in the design
of reciprocating
grates. This knowledge has been used to develop a completely new
design that has resulted in the best system available. The new grate
has following
major advantages:
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The new patented grate bars may be rotated to
double their service life. |
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Grate side cooling prevents slag formation which
means less maintenance. |
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The grate bars are machined to tight tolerances
and then bolted together
to give a uniform air flow over the entire grate resulting in
better combustion
and no hot spots. |
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Stable combustion can be achieved even at very
low outputs. |
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The grate design is modular; it can be retrofitted
easily into existing boilers or
furnaces |
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All actuators are placed at the front of the grate.
This means that there is no
maximum width limitation. |
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When combined with the patented fuel feed system,
the whole grate is only
used for combustion, not feeding fuel.
This means the heat release is maximized. |
Unique Control System
Saxlund International has developed a unique control system that
controls fuel feed, grate reciprocation speed, and airflow to achieve
optimum per-formance of the system with widely varying loads. The
system works especially well with multiple users, such as with a
thermal oil heating system and direct fired dryer in combination.
Ease of operation is enhanced by utilizing the latest man machine
interface (MMI) technology, showing all operating parameters in
real time. The automatic energy plant will measure-up to all demends
on periodic checking.
Ash and Slag Handling System
Saxlund International has wide experience with many types of ash
and slag handling systems.
Wet Ash System
Our standard system uses submerged ash conveyers to create a furnace
seal without the use of expensive rotary airlocks. It also cools
and conditions the ash for storage and transport.
Dry Ash Handling
Saxlund International supplies many types of equipment for dry ash
handling:
• Screw Conveyors
• Water Cooled Screws Conveyors
• Chain Conveyors
• Water Cooled Chains Conveyors
• Chain Elevators
• Bucket Elevators
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