Maintaining the running cost of a plant at a low level is often the difference between profit and loss. By saving the excess energy which is normally wasted during the drying process on a drum dryer, the mill profits twice: In the first place by the simple savings of energy; and secondly, by maintaining a constant moisture level. The latest Mahlo Atmoset shows how. For more information, visit www.ategroup.com.

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Save energy with the Mahlo Atmoset SMT-15
A.T.E. Enterprises Private Limited
V2.1 Mar 2018

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 Vertical drying ranges or VDRs can be found in every textile processing unit. All continuous textile
processing machines are equipped with VDRs. Standalone VDRs are common even in batch
processing units.
 VDRs have multiple drying cylinders, which are designed to dry wet fabric down to the required
moisture level in the fabric
 Manufacturers of continuous process lines calculate the number of drying cylinders required based on
the highest speed and the heaviest fabric
 In most cases there is no scope for controlling the drying process, which means that while heavy
products are dried adequately, lighter products are over dried
 Continuous high demand for steam, even when not needed, leads to excessive energy consumption
Vertical drying ranges (VDRs) – challenges

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Mahlo Atmoset SMT-15 allows
manufacturers to control the
steam used for drying according
to the residual moisture of the
fabric
Solution – Mahlo Atmoset SMT-15

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Depending on the total number of cylinders of VDR, the dryers are split into 4 groups
Atmoset SMT-15 – working principle
Entrance group
Centre group
Exit group
Cooling area

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For each group the temperature is registered by a PT 1000 temperature sensor
The cylinder temperature is measured indirectly through the condensate temperature
Atmoset SMT-15 – working principle

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Humidity measurement is by a residual moisture sensor (RMS)
The relative humidity of the fabric is measured by an RMS installed at the exit group of
the drying cylinders
Atmoset SMT-15 – working principle

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Controlling the steam using steam valves
The inlet of the steam in the cylinder is
through proportionate valves, which enables
effective heat transfer control
Atmoset SMT-15 – working principle

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 The first control loop is used to measure
and control the condensate temperatures
of the drum dryers combined in groups
 The deviation of the condensate
temperature from a preset point is used
to directly calculate the amount of energy
required for drying
 The steam supply is adjusted to the
moisture of the incoming product
 The second control loop uses a RMS to
capture the residual moisture of the
product after leaving the dryer
 The intelligent controller algorithms used
take all input variables into account and
provide rapid yet stable control of the
residual moisture
Atmoset SMT-15 – working principle

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Atmoset SMT-15 – advantages
Production of high quality fabric
 Prevents over drying; improves the dyeing
solidity, evenness, and overall appearance of
the dyed fabric as uniform moisture is
maintained across the width of the fabric
 Always achieves the optimal degree of drying,
regardless of the weight of the product or the
web speed
 The fabric feel is very good as the fabric
structure does not become flat
 The dyeing machine cooling requirement
relatively decreases since even moisture is
maintained across the width of the fabric
 Enables a stable and effective drying process

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Atmoset SMT-15 – advantages
Excellent return on investment
 The energy consumption of the dryers
drops significantly due to the optimised
heat output
 Higher savings leads to faster pay back
 Avoids additional cost of non-
performance and reprocesses or
claims, which leads to immediate pay
back
 Can be easily retrofitted into any
existing vertical drying ranges

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Successful installations

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Case study: Auro Textiles, Baddi – saving using Atmoset SMT-15

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