Adsorption dryer

Adsorption dryers are used wherever a pressure dew point of +3°C is not sufficient.

The drying of compressed air by adsorption is a purely physical process in which water vapor is bound (adsorbed) to a desiccant by deposition. For adsorption, the moist compressed air is passed through the adsorption dryer. As the compressed air flows through the vessel from bottom to top, the compressed air comes into contact with the hydrophilic desiccant. The desiccant thereby absorbs the moisture and dry compressed air flows out of the vessel.

COLD-REGENERATING ADSORPTION DRYERS

ADSORPTION DRYER ALM-CCDA

The ALM-CCDA series of compact adsorption dryers cost-effectively provides the highest air quality at the desired extraction point. With reliable technology, the ALM-CCDA offers the assurance that the production process will operate without interruption - without wear or faults on compressed air tools and with more safety for the downstream machines and manufacturing processes.
This ALM-CCDA series comes complete with built-in pre- and post-filters. The PCB controller with indicator lights is used to monitor the drying process.

The dryers are completely ready for use and only need to be connected to the power supply and the compressed air system. Alternatively, both a potential-free start/stop control and a load-dependent control are available to save energy.
The compact adsorption dryers of the ALM-CCDA series meet the requirements of ISO 8573.1 class 1.2.1 as standard. Higher quality classes are available on request.


Features and benefits:

  • Use at the extraction point: Air quality where it is needed.
  • Easy installation: Connection to power and compressed air supply only required.
  • Compact design: Designed for point-of-use, small footprint.
  • Easy maintenance: Designed for quick replacement of standard components.
  • Universal connection: Can be mounted on the wall or on the floor possible.

Application:

  • ALM-CCDA dryers provide clean air directly at the point of use.
  • Sensitive measuring instruments
  • Dental air
  • Medical air
  • Food packaging
  • Prefiltration for gas separation membranes
  • Breathing air without CO or CO2 removal
  • Paint spraying

 

ESSICCATORE AD ADSORBIMENTO ALM-CCDA C - SENZA OLIO

The ALM-CCDA C adsorption dryers with downstream activated carbon oil vapour adsorber are designed to dry compressed air down to a dew point of -70°C and a residual oil content of 0.003 mg/m³. The compact design allows them to be used directly where dry and technically oil-free compressed air is required.
All dryers are supplied ready for use with pre- and after-filter, desiccant and reliable PCB controller with indicator lights.
Optionally, both a potential-free start/stop control and a load-dependent control are available to save energy. The compact adsorption dryers meet the requirements of ISO 8573.1 class 1.2.1 as standard, and higher quality classes are available on request.

Features and benefits:

  • Adsorption dryer
  • Including additional activated carbon stage for oil-free compressed air with residual oil content up to 0.003mg/m³ (at 20°C)
  • Including pre-filter and after-filter already mounted on the dryer at the factory.
  • Particle separation 0.01 micron pre-filter, 1 micron post-filter
  • Cold regeneration design
  • Use at the point of extraction: air quality where it is needed.
  • Easy installation: Connection to power and compressed air supply only required.
  • Compact design: Designed for point-of-use, small footprint.
  • Easy maintenance: Designed for quick replacement of standard components.

Application:
ALM-CCDA C dryers provide clean and oil-free air directly at the point of use.

  • Sensitive instruments
  • Dental air
  • Medical air
  • Food packaging
  • Prefiltration for gas separation membranes
  • Breathing air without CO or CO2 removal
  • Paint spraying

ADSORPTION DRYER ALM-CDA

The ALM-CDA cold-regenerating adsorption dryers are used where compressed air has to be dried to a pressure dew point of -20°C, -40°C or optionally -70°C. The series offer compact design and simple operation.

Key data:

  • Pressure dew point: -20°C, -40°C, -70°C
  • Volume flow rates: up to 4200 m3/h
  • Operating pressure: 4 - 16 bar (g)
  • Ambient temperature: +1 - +50°C


ALMiG offers two control systems for the ALM-CDA adsorption dryers:

  1. PLC (time-based control)
    The HDD adsorption dryer has a time-based PLC control as standard. The standard cycle has five minutes of adsorption, followed by four minutes of desorption (removal of deposited water vapour from the desiccant) and one minute for pressure build-up.
  2. LCS (load dependent control)
    The LCS control is a load-dependent control that allows energy savings. Instead of the five-minute cycle of the time-based control, the LCS control has a dew point sensor that measures the moisture content at the dryer outlet. The dryer only regenerates when the set dew point is exceeded. This saves purge air and thus energy.

Features and benefits:

  • Welded vessels according to ASME or PED standard. Other standards and approvals on request
  • The use of self-cleaning wedge wire made of stainless steel in the humid area enables an even distribution of the air flow through the dryer with a low differential pressure
  • Indicator lights for on/off function, adsorption, desorption and LED indication of dew point (if a dew point sensor is installed)
  • Use of a high-performance molecular sieve for use in a wide range of conditions
  • Use of standard industrial valves for quick change or maintenance
  • Customised versions available on request
  • Easy maintenance

 

HEAT REGENERATING ADSORPTION DRYER 

ADSORPTION DRYER ALM-WDA

Two vessels connected in parallel are required for the continuous drying process by means of adsorption drying. Each vessel is filled with desiccants which act as a drying medium.
For ALMiG heat regenerating adsorption dryers ALM-WDA high performance desiccants are used, which have a long lifetime at high inlet temperatures and thus provide very low pressure dew points.
The advantage of a vacuum system over other heat regenerating systems is the lower evaporation temperature. Under vacuum conditions, water evaporates at a lower temperature than under pressure conditions. This shortens the heating time, which is cost effective in terms of energy savings.

Advantages:

  • The welded steel tanks are designed according to PED 2014/68/EU (other standards and approvals are available upon request).
  • A stainless steel slotted screen in the wet end of the vessel is a self-cleaning system that provides uniform distribution of airflow with low pressure differential throughout the system
  • Touch screen control for continuous monitoring to communicate with customer's control equipment via integration of Profibus and Modbus interfaces
  • Additional integrated monitoring of inlet and outlet temperatures
  • Features load sensing control (LCS) as a standard feature
  • Uses standard industrial valves for fast availability and easy maintenance
  • Low energy consumption, fast return on investment
  • No purge air is required for regeneration /
  • "ZERO PURGE"

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