Dezumidifcatoare - De la dispozitive portabile la sisteme industriale DST
World leaders in dehumidification.
Dehumidifiers –
From portable devices
to industrial systems
SEIBU GIKEN DST
Seibu Giken DST AB
was established 1985,
in Sweden
- DRY AIR SPECIALISTS
Moisture is found everywhere. Air moisture is usually referred to as relative humidity (RH). The
”relative” in relative humidity expresses the relation between the amount of water vapour present
and the amount that is physically possible at that temperature. In other words, relative humidity
expressed as a percentage, is the ratio of the actual partial pressure exerted by water vapour in air
to the maximum partial pressure that would be exerted by the water vapour if that air were saturated, at that temperature.
Seibu Giken DST are experts in the field and provide dehumidifiers for all applications. DST dehumidifiers are characterised
by their high reliability, low power consumption and service-friendly design. With our help problems that moisture can
cause will be avoided.
SILICA GEL ROTOR -
THE HEART OF A DST DEHUMIDIFIER
At the heart of every DST dehumidifier there is a D-MAX rotor from Seibu Giken Co.
Japan. The first in the world to manufacture silica gel rotors, they remain the world
leaders in this technology. The rotor is the most important single component in a
desiccant dehumidifier. It is the rotor that determines the capacity, efficiency and
lifetime of the dehumidification equipment. After 10 years of operation, the D-MAX
rotor still retains more than 90% of its original capacity.
Section of a D-MAX rotor
from Seibu Giken Co. Due
to the number of flutes
in the rotor it adsorbs
moisture with high
efficiency.
MOISTURE RELATED PROBLEMS
- AND HOW DEHUMIDIFICATION PREVENTS THEM
Condensation
Mould
Corrosion
Bacteria
Frost and ice fouling
Product sticking
No condensation droplets and subsequent problems with
wet products, short circuits in control devices, repainting
and puddles on the floor.
Extend the lifetime of tools, machines and steel structures
by pr
otecting untreated steel against corrosion without
painting or greasing.
No ice fouling on products, floors and ceilings. Also,
extended times between defrosting and thereby increased
operating time of freezers.
Mould and fungus formation is prevented if the
surrounding air is kept below 70%RH.
If the relative humidity is kept below 50%RH bacteria will
not thrive.
Moisture sensitive products do not stick together and
problems with clogged pneumatic transport and lump
formation in silos are removed.
SORPTION DEHUMIDIFICATION
- HOW DOES IT WORK?
In sorption dehumidification, the basic
principle is that a rotating rotor in the
dehumidifier continuously adsorbs moisture
from the process air. Then through a
regeneration cycle the moisture is driven out
of the rotor and exhausted in different ways,
the principle pictures are demonstrating how.
Incoming moist air
Outgoing dry air
Outgoing wet air, either passed or
condensed out
The Consorb principle is best
used at lower regeneration
temperatures, typically where
waste heat is available or where
the air inlet moisture content
is very high. The Consorb principle is also used in balanced
‘closed’ type systems where the
dry process air is recirculated.
Aquasorb basically functions as a Consorb but moisture
Recusorb DR has an internal
heat recovery with one fan that
produces both the dry airflow
and the wet airflow. Used for
introducing dry fresh air into a
process or to an ‘open’ or ‘total
loss’ system where the dehumidified air is ducted into the
object. Can be used on both
‘open’ and ‘closed’ type systems.
in the wet air is condensed through an air cooled condenser. One centrifugal fan is used for both the dry air and the
condenser cooling air, so all energy released during the
process accumulates in the room. Commonly used where it
is impractical to use ducting for the reactivation air system.
Recusorb R has an internal heat recovery to improve
operating efficiency. Heat transferred to the r
otor during
regeneration is effectively recovered by the incoming regeneration air, thus reducing the amount of energy required
by the regeneration heater. The process air outlet is both
cooler and drier when compared to other desiccant dryers.
Econosorb combines a heat pump with the sorption
Frigosorb is used in applications where it is difficult to
rotor in a unique way, providing very low energy consumption with a low dry air temperature. It’s probably the most
energy efficient dehumidifier on the market, with approximately 25% of the total energy consumption of regular
sorption dehumidifiers. Econosorb has both condensation
and wet air flow.
remove a wet air flow. Thanks to the heat pump function
Frigosorb is very energy efficient, using approximately
33% of the total energy consumption of regular sorption
dehumidifiers.
DST DEHUMIDIFIERS
Consorb CS
Consorb
Recusorb DR
Consorb
Aquasorb
Recusorb DR
CS-5/5L
DC-5
DR-010B
DC-10
AQ-30B/31B/31L
DR-20B/30D
0.35
0.4
0
.5
0.6
0.6
0.85
1.15
1.55
0.8
1.1
65
90
120
190
190
330
330
370
330
360
Consorb
Recusorb DR
Recusorb DR
Consorb
Recusorb DR
Consorb
DC-20/30 T10, T16
DR-31 T10
DR-40 T10, T16
DC-31 T10, T16
DR-50R
DC-50R
1.1
1.3
1.5
1.6
1.6
2.3
1.4
2.1
2.8
3.0
310
400
400
310
600
550
300
490
600
550
Recusorb R
Recusorb R
Recusorb R
Recusorb R
Consorb
RL-60/60LR
R-51R/61R
RL-61/61L RL-71/71LR
RLZ-81/82/101/102/102L/104
CZ-82/102/102L/104
4
5
7.3
10
850
1000
1250
1450
7.5
8
11
11.5
13
14
17
1300 1600 1800 2100 2500
3000
3200
19
20
25
27
30.5
22
23
36
39
34
49.5
57
70
54
50
55
65
69
4500
4600
6000
3200
5200
7200
8000
2900 3500
7000 9000 10000 10500 12000
Consorb, Econosorb,
Frigosob, Recusorb
Flexisorb
LARGER
Capacity kg/h
(20˚C/60%RH)
Airflow m³/h
10000 12000
DEHUMIDIFIERS FOR INDUSTRIAL
APPLICATIONS
The Flexisorb dehumidifier system can be
tailored to suit individual requirements.
Everything fr
om basic desiccant dehumidification to a complete climatic control
system is offered. With total flexibility in
design, these highly efficient industrial
atmospheric air dryers are structured
around the rotor to conform precisely to
customers’ specifications. Dehumidification is the prime objective of Flexisorb,
and whilst pre-cooling is often required,
post cooling and post heating can also be
included. The Flexisorb system offers one
of the most versatile air drying systems
available today.
Rotor
Heater
Cooler
Filter
Fan
Example of configuration for a Flexisorb
A FLEXISORB’S QUALITIES
All Flexisorb dehumidifiers are designed to be energy-efficient
and environmentally friendly. Regeneration heaters are available
for use with natural gas, LPG, steam, hot water and electric - or
a combination of two. Flexisorb units are constructed with an
anodized aluminium frame and a smooth interior that makes
it easy to wash to maintain good hygiene levels. Stainless steel
panels are available
as options for dehumidification in demanding
environments.
In the Flexisorb
dehumidifiers the Consorb,
Econosorb, Frigosorb or
Recusorb principles can be
used.
HUMIDITY AND TEMPERATURE
CONTROL
Humidistat and
controller EH3 T2
Humidistat EH4
PLC C4 with 5.7” graphic touch display.
Advanced PLC control with large expansion options
DST can deliver dehumidifiers with complete control systems for both humidity and temperature control. By having
integrated control of the output temperature, the total energy consumption is reduced in the air handling process. This is
due in part to the optimized controls that regulate the dehumidification process and temperature requirements and in part
by setting the right configuration and using fresh air and exhaust air to suit each case. PLC C4 is used for advanced control
of our larger dehumidifiers. The features are tailored to fit the customers’ requirements and can be set to communicate with
higher-level systems with Modbus. There is also
as options for dehumidification in demanding
environments.
In the Flexisorb
dehumidifiers the Consorb,
Econosorb, Frigosorb or
Recusorb principles can be
used.
HUMIDITY AND TEMPERATURE
CONTROL
Humidistat and
controller EH3 T2
Humidistat EH4
PLC C4 with 5.7” graphic touch display.
Advanced PLC control with large expansion options
DST can deliver dehumidifiers with complete control systems for both humidity and temperature control. By having
integrated control of the output temperature, the total energy consumption is reduced in the air handling process. This is
due in part to the optimized controls that regulate the dehumidification process and temperature requirements and in part
by setting the right configuration and using fresh air and exhaust air to suit each case. PLC C4 is used for advanced control
of our larger dehumidifiers. The features are tailored to fit the customers’ requirements and can be set to communicate with
higher-level systems with Modbus. There is also
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