Higher efficiency thanks to new
control system for waste incineration
and district heating in Zurich
Reference – Control System
Instrumentation, Controls & Electrical
SPPA-T3000 Control System
optimizes operation and efficiency of the
Hagenholz waste incineration plant and the
Aubrugg wood-fueled CHP plant in Zürich.
The Result
■ Increased efficiency by
control of processes across
multiple facilities in
coordination with the
Aubrugg wood-fueled CHP
plant
■ Easier plant control due to
the usage of a single
operation and monitoring
system for all components
■ No shutdowns during
the modernization thanks
to top-class project
management
The Plant
The Hagenholz waste incineration plant
includes waste incineration, co-incineration of
sewage sludge and flue gas treatment. The
plant generates steam and power as well as
supplies hot water to the district heating
network – with a total thermal output of
84 MW. District heating and heat for industrial
processes are provided to the northern part of
Zurich, where the university and the Swiss
Federal Institute of Technology are located.
Any extra demand in the Zurich district heating
network during winter is covered by the
Aubrugg wood-fueled CHP plant.
SPPA-T3000. By using the same I&C system
throughout, it is possible to optimize the
coordination of heat production in both plants.
The control systems of the turbine, power
facilities and sewage sludge incineration system
have also been integrated. With its shared
operation and monitoring system, the global
solution can be used to operate all the facilities
from one control room with big screens.
Plant efficiency is significantly improved by
optimizing the control of the incineration
process and by using a single operator control
and monitoring system. A total efficiency of up
to 70 % is achieved.
The control technology modernization took
place over several years. Existing components
remained in use until their replacements were
up and running, ensuring uninterrupted
operation. Thus expensive and time-consuming
plant shutdowns were avoided.
The Task
In line with a uniform concept, it was decided to
equip the waste incineration plant, the woodfueled CHP plant and all auxiliary systems with
the same control system. The modernization
was to take place without affecting operations,
and should moreover improve efficiency.
Our Solution
The existing I&C system of the Hagenholz
waste incineration plant and the Aubrugg
wood-fueled CHP plant was replaced by
SPPA-T3000 Control System. SPPA-T3000
controls the incineration of supplied waste in
the optimum operating point, regardless of the
quantity and quality of the various materials.
In case that additional heat is required or at
times of peak load in the district heating
network, the required extra capacity is
generated by the Aubrugg wood-fueled CHP
plant or by using gas or oil. The incineration
processes are controlled and monitored by
"We are very satisfied with the
new control system. The plants
are stable in operation and we
have managed to increase
efficiency even further.“
Erich Züst, manager of the modernization project
Entsorgungs und Recycling Zürich
Answers for energy.
Published by and copyright © 2012:
Siemens AG, Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
For more information contact
sppa-t3000.energy@siemens.com
www.siemens.com/energy/sppa-t3000
Siemens Energy, Inc.
Instrumentation, Controls, & Electrical
1345 Ridgeland Parkway, Suite 116
Alpharetta, GA 30004, USA
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