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Heat of Compression Air Dryer

Summits Heat of Compression Air Dryers (HOC Air Dryer) remove the moisture to a level of 80 ppm(w) by using Heated regeneration technology. The hot air directly from the compressor discharge (140oC to 220oC) enters into one desiccant tower, regenerates the saturated desiccant, enters into an heat exchanger and gets dried by the high performance desiccant adsorbent while passing through the other desiccant tower. The dry air passes through a post filter to the utility. A reliable programmable logic controller controls the valve operations effectively therby ensures continuous dry air output to the utility.

hoc air dryer


  • Automobile

  • Power Plants

  • Cement

  • Co-generation Plants

  • Chemical

  • Food Processing

  • Instrumentation

  • Packaging

  • Paper

  • Pharmaceutical

  • Textiles

Operating Principle


Like all desiccant dryers the principle of drying is adsorption. But unlike desiccant dryer HOC dryer makes use of heat generated during compression of air to regenerate the saturated alumina thus consumes less power in terms of electrical energy and loss of compressed air.

Regeneration of saturated desiccant is accomplished by two different, consequent process called heating and cooling of desiccant. Heating is accomplished by the hot air coming out of air compressor discharge. Cooling is accomplished by the dry air coming out of drying tower.

Cool Dry air turns to hot dry air once it passes through the regeneration tower. This hot dry air is cooled to ambient temperature by Regeneration cooler.

Process-Generation of dry air needs temperature of air to be not more than ambient temperature. This temperature reduction is accomplished by after cooler (intercooler) and bulk moisture is separated in Moisture separator. Regeneration cooler and after cooler can either be water cooled or air cooled.

Thus the Drying and regeneration is carried out automatically by Pneumatic actuator driven valves.

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