Panels & Furniture Asia March/April 2018

28 PANEL MANUFACTURING
Flash tube dryer
Dieffenbacher’s drum and flash tube dryers are recognised for their efficiency,
reliability and ability to meet high safety standards. In total, Dieffenbacher
(together with former Metso/Sunds and Schenkmann Piel Engineering) has
sold 85 drum dryers and 196 flash tube dryers over the last 40 years.
Energy systems from Dieffenbacher with capacities of up to 120 MW thermal
capacity can use a wide range of biomass fuels to generate hot gas for the dryer, or
produce steam or hot thermal oil for various heat consumers. Together with former
Teaford, Dieffenbacher has sold 36 energy systems around the world.
Drum dryer
DRUM DRYERS
Dieffenbacher recently sold two drum dryers with 100 t/h mechanical throughput
on a dry basis. These drum dryers are the ideal solution for drying wood fibre for
particleboard, strands for OSB production, disintegrated seasonal annual crops
and other biomass. The dryer internals are designed according to the material’s
characteristics for high thermal efficiency, low moisture fluctuation and low
emissions.
FLASH TUBE DRYERS
Flash tube dryers from Dieffenbacher
should be the first choice for efficiently
drying wood fibres for the production
of MDF, HDF and THDF. Dryers with
a dry fibre throughput of more than
60 t/h have been operating for many
years. In addition to single-stage dryers,
Dieffenbacher also offers two-stage
dryers and single-stage dryers with
air recycling system, offering energy
cost savings of up to 15 per cent and
a significant reduction in the exhaust
gas flow. Additional benefits can be
achieved by adding the EVOjet M and
SGF or Z-sifter to the dryer and energy
system package.
ENERGY SYSTEMS
With their robust design and
low maintenance requirements,
Dieffenbacher energy systems allow
long operation periods without forced
shutdown. This provides high availability
and reliable operation.
The firing system consists of an
air-cooled reciprocating grate using the
coarse biomass fractions of the wood
panel production process (eg: bark,
wood chips, coarse trimmings) as fuel.
The system can be equipped with various
injection nozzles for the combustion
of dust and granulate fractions from
screening, sawing and sanding as well
as additional gas burners. Generating
hot thermal oil and providing hot gas
to the dryer system can be controlled
independently of each other in order
to meet individual peak load demands.
Recirculating hot gas from downstream
March / April 2018 • Issue 2 • PANELS & FURNITURE ASIA