Chemical Engineering April 2023 - 57

Solids Processing 2023 Special Advertising Section
45% saving in heating energy with
new drying process
D
rying means evaporation of liquids,
often water from sludges or similar
products. This process duty requires much
input of energy.
Unfortunately, traditional drying processes
do not satisfy today´s requirements
of energy use and efficiency. They use the
heating energy only once although more efficient
process principles are well known. In
evaporation technology it is common practice
to apply multiple effect evaporation.
The process is split into sequential steps.
In each step vapours are generated and
condensed. The energy which is set free during condensation is recovered and is re-used to
heat a previous step.
This process scheme is introduced to drying technology by Buss-SMS-Canzler. A
2-stage drying process is provided. Stage 2 is operated at atmospheric conditions - as in
traditional drying. Stage 1 is operated under vacuum conditions, which results in a lower
evaporation temperature than in stage 2. At such low evaporation temperature, the temperature
level of the condensation of stage 2 is sufficient to heat stage 1. In this way, the condensation
energy from stage 2 can be used a second time.
As a result, approximately 45% of heating energy can be saved in the drying process.
Like the multiple-effect evaporation, the evaporation and the drying under vacuum is
also well known to Buss-SMS-Canzler. The operating principle of applying the product in a
thin film on the heating wall allows the thin film dryer to perform very well under vacuum.
An example of this application is the drying of sewage sludge.
Modular Design for Maximum
Flexibility
The modular platforms
of the HMI portfolio from
Pepperl+Fuchs offer
individual solutions for
applications ranging from
non-hazardous areas to Zone 1.
T
he VisuNet GXP and VisuNet FLX HMI device families enable maximum flexibility for
use in the process industry. The modular design allows HMI systems to be configured
to meet precise individual needs, providing extremely quick, simple service options in the
field. This means that a comprehensive range of technologies, installation options, and peripherals
is available for customers. Each HMI system consists of at least one computer unit
and one display unit, each of which can be individually configured. The operator workstations
from Pepperl+Fuchs are designed and certified for use in ATEX/IECEx Zone 1/21, Zone
2/22, and Div 1 applications. In addition, all products can be used in non-hazardous areas.
The VisuNet RM Shell 5 firmware developed by Pepperl+Fuchs for VisuNet thin clients
is based on Windows 10 IOT 2019 LTSC and offers a simple way to make individual adjustments.
The highest safety standards and flexible configuration options allow connection to
numerous virtualized and conventional process control systems.
The product range is rounded off by rugged box thin clients for use in control rooms and
switch cabinets. In addition, mobile tablet thin clients from Pepperl+Fuchs ensure a complete
portfolio for virtualized and conventional process control systems. With the VisuNet
Control Center software, the thin clients can be managed seamlessly and centrally - from
Zone 1 to the control room.
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM APRIL 2023
www.sms-vt.com
Contaminationfree
drying of
HAPI products
Customized containment
systems by PINK GmbH
Thermosysteme
T
he drying of highly active and toxic substances
in test centers, laboratories and
production calls for protective measures for
the operator as well as the product.
To ensure the best protection for both
and for the safe handling of HAPIs, PINK has
combined its vacuum drying oven type VSD
with an isolator and mobile pressure nutsch.
The developed system type VSDIN is ideal
for drying
these
substances.
Due
to its construction
concept,
the
drying
oven VSD
offers an
ideal basis
for GMPprocesses
and
for extremely pure and contaminationfree
terms for producing sensible and even
high toxic products. The interior has rounded
edges with no jointings and no hidden surfaces.
All surfaces are visually controllable
for the operator. The heated shelves as well
as the top and the bottom are constructed
double-walled and are connected to the side
walls absolutely jointless.
The integrated isolator is equipped with
ergonomic arranged gloves for safe handling
of the product. The inside is also designed
according to GMP. A CIP-device as well as
spray guns grant a proper cleaning in order
to avoid any cross contamination.
For applications in which the filling and
filtration of the product takes place outside
the isolator, PINK offers a mobile pressure
nutsch for contamination-free docking. This
enables the prefiltration of liquid products
before the drying process proper, thus optimizing
work processes.
The GMP-compliant system VSDIN features
a main and lock chamber, RTPs for
product infeed and discharge, an integrated
vacuum drying oven VSD as well as a weighing
system and sieve mills.
The operator and the product are protected
at all times, no cross-contamination, no
product loss.
www.pepperl-fuchs.com/hmi
www.pink.de/en
57

http://www.sms-vt.com http://www.pink.de/en http://www.pepperl-fuchs.com/hmi http://WWW.CHEMENGONLINE.COM

Chemical Engineering April 2023

Table of Contents for the Digital Edition of Chemical Engineering April 2023