2004 - ANDRITZ Vertical volute pumps

generate electricity from wood-based fuels (black
liquor from the cooking process) while reducing
emissions.
A new development, the Andritz LMD-Filter
(special disc filter for separating, washing, and
drying lime mud) offers superior washing results. It
lowers the amount of sulphur residuals which enter
the lime kiln and should result in lower sulphur
emissions into the air.
There is a strong demand in the market to
reduce water consumption. Andritz, as a market
leader in large pulp drying machines, has developed
machines with closed water loops so water
can be reused. These machines also incorporate
sub-systems for the collection of spill water and
the reuse of cooling water such that the total
amount of fresh water required can be reduced to
an extremely low 1.5 m 3/ton of pulp.
In terms of true energy conservation, RTS
mechanical pulping technology produces highquality
mechanical pulp at up to 30% lower specific
energy consumption. This results in huge
energy savings for paper producers with a major
impact on reduction of greenhouse gas emissions.
For an RTS TM-TMP system with an annual production
of 175,000 tons, energy savings can amount
to 70,000 MWh a year. If an oil-fired power plant
is utilized to provide electrical energy for the refiner,
the savings are equivalent to 17,000 tons of oil per
year. At the same time, the emissions of CO2, a
major contributor to greenhouse gases worldwide,
are reduced by 48,000 tons per year. Thus, the
RTS TM-TMP system can make a major contribution
to the objectives of the Kyoto protocol.
P-RC APMP is a chemi-mechanical pulping
process that minimizes energy consumption and
the consumption of bleaching chemicals. The
high-consistency peroxide bleaching technology of
Andritz (PHC) also minimizes the consumption of
bleaching chemicals. By eliminating chlorine and
sulphur-containing chemicals, the bio-degradability
of process effluents is significantly improved.
Papermakers have the opportunity to save considerable
energy and minimize effluents with the
new Andritz FibreSolve LC and HC pulpers, as
well as the CompaDis disperser system.
In Rolling Mills and Strip Processing Lines,
many process materials are used that would be
harmful to the environment if they were not prop-
GLOBAL SERVICES/ACTIVITIES
ENVIRONMENTAL PROTECTION
erly recycled or disposed of. Andritz systems
are designed to make maximum use of, and to
recycle, such materials as rinse waters, rolling
emulsions, and pickling acids. Evaporation is
used in some processes to avoid the generation
of wastewater. A process was developed for the
complete recycling of the electrolyte (sodium sulphate)
used in electrolytic pickling. In this recycling
step, hexavalent chromium (formed during the
pickling operation) is completely eliminated.
Sundwig, an Andritz affiliate company, developed,
and has continually improved, “no-rinse
coaters” over the years. The application of
hexavalent chromium coating to the strip can now
be carried out in a closed chemical fluid circuit
which prevents contamination of the surrounding
environment.
The Environment and Process Business
Area supplies complete process lines which convert
liquid sewage sludge into a fuel granulate.
With a calorific value of approximately 11 to 13
MJ/t, this granulate can be used as a substitute for
fossil fuels in heat and power generation systems,
reducing CO2 emissions.
The Feed Technology Business Area is a
leading supplier of equipment for the production of
environmentally-friendly, renewable fuels. Biofuel
production is expanding beyond its established
base in North America and Western Europe to new
regions where there are surplus raw materials from
forestry and other industries. Andritz equipment
is being utilized to produce biofuel from wood,
peat, and other agricultural by-products. In this
way, highly valuable fuels are generated from surplus
materials, which would otherwise have to be
disposed of. Andritz also supplies waste pelleting
equipment which can offer an environmentallyfriendly
alternative to landfills.
Hydropower is an essential renewable energy
source which does not pollute the environment
and produces no waste. Only 20% of the world’s
hydropower potential has been developed so far.
The Hydraulic Machines Business Area has
been providing state-of-the-art equipment and
comprehensive services to hydropower plants for
more than 130 years.
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