Nicos - TFT AirDry

AirDry Dehumidifier

The TFT AirDry is designed with advanced features to ensure optimal performance, safety, and efficiency in various industrial environments.

Dehumidifier components

The dehumidifier’s structure is made from durable materials such as galvanized steel and AISI_304 steel. The top panel of the unit can be removed for easy access during maintenance of electrical components and other internal mechanical parts. Connections for the dehumidifier can be made with standard spiral ducts, ensuring flexibility during installation.

Fans

The dehumidifier is equipped with fans that are directly coupled to either single-phase or three-phase motors, rated at IP55, ISO F, class B. These fans are accessible for maintenance through the top panel and start the dehumidification process immediately upon operation. Both the process and regeneration fans work in tandem to ensure effective dehumidification.

Rotor

The rotor is a key component for the adsorption process. It is made of a desiccant material with a honeycomb structure formed from corrugated, heat-resistant sheets. The rotor contains silica gel, which provides a high absorption surface area in a compact volume. It is designed to withstand saturated air without sustaining damage. Even if the process or regeneration fan stops due to failure, the rotor remains intact. Additionally, the rotor is non-combustible and non-flammable, ensuring safety during operation.

Transmission System

The rotor is rotated using a belt drive system that operates between 6 and 12 revolutions per hour (rph). The direct drive motor and reduction gearbox provide efficient movement through frictional contact with the outer rim of the rotor. A belt tensioning system is used to maintain the correct belt tension and prevent slippage. The rotor’s rotation is visible by removing the front access panel, allowing for easy monitoring of its operation. The rotor is suspended on ball bearings attached to a central steel shaft.

Regeneration Air Heating Coil

TFT AirDry Dehumidifiers can be supplied with various types of regeneration air heating coils, according to the utilities available on site. The two most commonly used options are electric and steam-based systems:

Electric Coils: Equipped with star-connected steel elements, the electric regeneration coil is divided into two, three, or more sequential control banks to allow for staged power modulation. For enhanced energy efficiency, continuous modulation with proportional power control is also available upon request.
Steam Coils: Constructed from 304-grade stainless steel tubes with aluminum fins (alternative materials available upon request), the steam regeneration coil includes a 2-port valve with a modulating actuator to control the steam flow and thus the dehumidifier performance.

Additionally, we can offer hybrid configurations combining steam and electric sources, as well as systems utilizing gas or hot water.

Filters

The dehumidifier has two separate G4 filters: one located on the process air inlet and one located on the high temperature regeneration air inlet. On request, higher grade filters can be supplied. These filters help maintain the efficiency of the system by preventing dust and debris from entering the airflow.

PLC control with touchscreen terminal

All standard units from model AD1000 and above are provided with PLC control. The PLC controls the following functions:

Regeneration temperature regulation
Thermal protection
Regeneration cool-down timing
Component start-up sequence
Alarm reset
RH or dewpoint control (depending on control required)
Control of pre- and post-cooling or heating

The user interface display can be installed remotely for convenience. The PLC is set for heater control from an external humidistat. Upon request, it can be adapted for connection to remote BMS systems.

If required by your process, compatibility with various MODBUS protocols can be discussed with our technical department.

Electrical Panel

The electrical panel is made in compliance with European Directives 73/23 and 89/336. Access to the electrical panel is from the top, after removal of the cover. All units include the following components as standard: