Gas Dryer

Gas-Dryer

Gas Dryers are classified based on the mode of regeneration for reactivation of the desiccant.



“KILBURN, in more than 39 YEARS, has DESIGNED, MANUFACTURED, SUPPLIED & INSTALLED more than 150 CUSTOMIZED GAS DRYING SYSTEMS  for VARIOUS APPLICATIONS “

WORKING OF
ADSORPTION

The agglomeration of gaseous or liquid molecules to the surface of a solid is known as adsorption. The solid is called the adsorbent or desiccant.
Adsorption is a surface phenomenon and is directly proportional to surface exposed and concentration, pressure, and polarity of the substance to be adsorbed. Adsorption generates heat proportional to the combination of heat of condensation and wetting. The Static equilibrium adsorption capacity is higher than that of dynamic condition for a particular relative humidity.

ADVANTAGES
AND SPECIAL FEATURES

• Designed for consistent product quality.
• Optimum design for longer period of operation without change of adsorbent.
• Lower Utility Consumption.
• Minimum Pressure Drop.
• Use of standard makes of components such as filters, Coalescer, valves etc.
• In-house Laboratory facility for testing of adsorbent and quality control.

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SPECIAL DESIGNS

HEATLESS PRESSURE SWING TYPE

A part of the product dry gas is depressurised and passed through the loaded adsorber for reactivation.
The pressure of the feed gas should be around 7 kg/ cm2g or above.
Regeneration gas quantity depends on feed gas pressure and temperature. In order to avoid pressure shock, the adsorber is pressurised before change over.

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Salient Features
Low capital cost.
No heater.
Power for control purpose only.
Ideally suited for hazardous area.
Desiccant does not experience thermal shock- hence longer life.
Minimum maintenance as no heater. blower or motor.
Very compact plant- hence less area required for installation.
No contamination from foreign gases.

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NO LOSS PURGE TYPE

A part of the feed gas is heated and used for reactivation . Then reactivation gas is cooled, moisture separated and finally mixed with the feed stream in a distributor from where gas is passed into adsorber under adsorption.

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Salient Features
No blower.
No pressurisation and depressurisation.
No pressure difference across tour way valve.
No contamination from foreign gas.
No loss of dry Air.
Ideally suited for large capacity plant.

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OPEN LOOP BLOWERTYPE

While one adsorber is kept under adsorption the other is regenerated by passing hot air by means of a blower through a heater and finally vented to atmosphere. There is provision for pressurisation and depressurisation.

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Salient Features
Adsorbers can be kept regenerated before commissioning.
Adsorption is independent of regeneration.
No Joss of compressed air.

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CLOSED LOOP BLOWER TYPE

Operation of this system is similar to open loop blower type except that reactiva tion is done through a cooler and moisture separator in a closed loop.

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Salient Features
No contamination from atmosphere.
Desiccant bed can be thoroughly cooled.
No appreciable change in quality of dry gas just after change over.

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PRODUCT PURGE TYPE

This process is specially suited for high pressures as only small quantity of product gas is to be purged for reactivation.For reactivation saturated adsorber is depressurised. A small quantity of dried gas is throttled, heated by means
of a heater and passed through the adsorber. For gases other than air, the purge gas can be recycled back to the suction of the compressor.

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Salient Features
No moving parts such as Blowers and motors.
No contamination with foreign gases.
Longer cycle time.
Due to depressurisation, regeneration can be done with nominal heating.

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