Zero Purge Lose Heat Regenerated Adsorption Compressed Air Dryer – DMA Dryer

The outstanding feature of the DMA heated blower purge dryer utilize atmospheric air for regeneration of the desiccant bed. No process air is used during this phase of the overall dryer cycle. The complete drying system operates fully automatically and continuously. The DMA dryer can help you to achieve the operating cost saving up to 40% when delivery the ISO 8573.1 class 1, -70°C pressure dew point compressed dry air.

The heat-regenerated purification system consists of two vessels operating in parallel and connected together, to be cycled alternatively as adsorption and regenerating chambers. To ensure continuous operation while one vessel is adsorbing the water vapour from the incoming air, the other vessel is regenerated. The regeneration takes place by using an externally mounted blower and an electric heater. The operation of adsorption and regeneration takes place simultaneously, without interruption of the process. Regeneration is conducted by a blower inhaling ambient air which is heated up to the required temperature and led through the vessel. Flowing through the vessel from top to bottom the heated air desorbs water from the desiccant and leads it via the regeneration exhaust to the atmosphere. The temperature at the regeneration outlet increases when the adsorbed water is totally evaporated. The regeneration cycle is finished when the necessary desorption temperature is reached. Cooling takes place directly after desorption, using the closed loop (with an air/fresh water-heat exchanger) to avoid preloading of the desiccant by ambient air. The heaters are now switched off. After finishing cooling the freshly regenerated vessel rests in stand-by until change over is initiated by the control.
 

Air Quality The International Stands Organization (ISO) has established the following air quality classifications relating to maximum size and concentration of particles, maximum pressure dew point and maximum oil content.

ISO 8573.1 Air Quality Classes

The Principle of DMA Dryer

Adsorption from Bottom to Top - Incoming air flows to the dryer inlet via the inlet valve installed at the bottom, it then passes into the adsorber vessel via the stainless steel inlet gas distributor. The air is diffused homogenously across the desiccant bed, utilising all the adsorption material. During the adsorption process water vapour is attracted to the surface of the hydroscopic desiccant. The wet air is dried to the required dew point as it passes through the desiccant bed from bottom to top. The purified air then flows via the stainless steel diffuser screen, to the outlet.

Desorption from Top to Bottom

Air is taken in by a blower and heated up to the necessary regeneration temperature by an electrical heater. The temperature is set by thermostats. The heated air is led via the upper valve and a gas diffuser into the vessel which is to be regenerated. The air is diffused homogenously and vaporises the water from the desiccant. Via the lower gas diffuser and the outlet valve the saturated air is led to the atmosphere. Vaporising the water, the heated air is cooled down. Thus, the temperature of the humid exhaust air isn't higher than the temperature of vaporisation. When desorption is accomplished and the humidity is removed, temperature will rise at the regeneration outlet. At the regeneration outlet a temperature switch ends desorption phase as soon as a preset temperature value is attained.

Cooling from Bottom to Top

To avoid preloading of the regenerated adsorber by ambient air cooling takes place in a closed circuit. Air, conveyed by the blower, takes up the heat from the desiccant, the vessels and pipes and is led into the cooler, where it is cooled down before it is sucked again by the blower. As soon as a preset temperature value is attained, cooling is finished by a thermostate.
 

Name	:	ATS Air Solutions (M) Sdn Bhd
Business Type	:	Compressors - Air & Gas , Filters - Air & Gas - Commercial & Industrial
Main Product	:	ATS Zero Purge / Lost Heat Regenerated Air Dryer (DMA Series), ATS N2/O2 Generator, La-Man Extractor / Dryer, Internal & External Automation Drain Mechanical Auto Drain Trap, ATS Compressed Air Filter / Water Separator
Year Established	:
Location	:	Subang Jaya
Website	:	http://www.ats-malaysia.com

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