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GASO                            Adsorption Technique


 
Adsorption, the wonder process, is the focal point of our company.
We strive hard to design adsorption systems to meet your every requirement - be it Air, Gas or Liquid.

In the process industry most of the times they may become-

"ONE OF ITS KIND - CUSTOMER DESIGNED UNIT."

Hence this calls for minute detailing of each part of engineering - be it Concept or Detailed.

To take the challenge, we are geared up with the right kind of
                                 - People
                                 - Technology
                                 - Tools like computer simulation
                                 - 3D modelling, etc.

Call or drop in a line, so that we can contribute positively to your decision process.

 

AIR DEHYDRATION PACKAGES.

Heatless Dryer

This series operate on the "Pressure Swing" Principle. Pressure swing dryers regenerate desiccant bed by expanding a portion of dried air to atmospheric pressure. This swing in pressure when passed through the desiccant, picks up moisture from the desiccant pores which were loaded with moisture in the previous adsorption cycle.

Pressure Bar- (g) Temperature Deg - C

Flow Nm3/hr.

Dew Point Deg. - C
5 to 12 40 to 60 5 to 9000 -40 to -70


Internally Heated Dryer.

These are heat regenerative dryers. Heater is installed in the desiccant bed. Wet inlet air is directed through the drying tower where moisture is absorbed on the desiccant. A small portion of the dry outlet air is diverted to the regenerating tower. It flows the dry outlet air is diverted to the regenerating tower. It flows downward over the heater and then upward through the bed where it collects moisture from the desiccant. Wet air is exhausted to atmosphere through the purge valve.

Pressure
Bar- (g)
Temperature Deg - C

Flow Nm3/hr.

Dew Point Deg. - C
5.5 to 11 40 to 60 20 to6000 -40 and lower

 


Blower Reactivated Dryers.

Wet air form compressor is passed through one of the bed which is in adsorption mode and thus dries the air.

For regeneration, normally atmospheric air is used, through the blower. (Regeneration at pressure in closed loop is also possible.

Blower starts and the air is passed through heater, where it gets heated up to the designed temperature and then enters the bed. After regeneration moisture laden air is exhausted to the atmospheric through silencer.

When the regeneration temperature is reached at outlet of the bed, then heater will be switched off and blower now continues blowing air through the same tower to cool down the reactivated desiccant.

These can also be designed for counter current heating and co-current cooling.

Pressure Bar- (g) Temperature Deg - C

Flow Nm3/hr.

Dew Point Deg. - C
1 to 12 40 to 60 350 to10000 -4 and lower

 

Split Stream No-Loss Dryer.

The compressed air coming from compressor is split into two different streams.

Regeneration flow is the fixed, calculated flow. With the help of flow transmitter, required regeneration flow is maintained, irrespective of the demand.

Regeneration air is then passes over an electric heater and this hot air is diverted to pass through the bed, in counter current mode where it picks up moisture from the bed and the same is passed separated out of the cooler and separator.

Then this air gets mixed up with the other stream and then enters the tower which is in adsorption mode. The moisture is adsorbed and dry air goes out to the net.

During cooling the heater is switched off and the air is diverted to enter bed in co-current mode.

These can also be designed for counter current heating and co-current cooling.

Pressure
Bar- (g)
Tempereture Deg - C

Flow Nm3/hr.

Dew Point Deg. - C
5.5 to 12 40 to 60 350 to 25000 -40 and lower


Heat of Compression Dryer.

In this type of dryers hot air from the last stage of compressor is fed to one of the towers (May be partially or fully depending on the design.), which desorbs the previously loaded bed, and the same is passed through the properly sized intermediate cooler and high efficiency separator.

The air in case of full flow system, goes straight to other tower, gets dried and goes to the systems.

In Case of partial flow, only a part of air goes through the regeneration bed, and after cooling, it gets mixed up with the main incoming air.

Control of this dryer has to be perfect one, as no preset time is taken for regeneration; moreover the regeneration depends on compressed air demand and hence in each cycle, the flow has to be measured and the cycle time has to extended proportionately, in case flow required per unit time is lower than the design flow.

Pressure
Bar- (g)
Temperature Deg - C

Flow Nm3/hr.

Dew Point Deg. - C
5 to 12 150 and above 350 to40000 -40 and lower

GAS & LIQUID DEHYDRATION PACKAGES

The typical dehydration system consists of two fixed adsorber beds, with one bed in the adsorption mode while the other bed is being regenerated. Since drying is typically a continuous operation, the beds are continuously switched back and fourth between the adsorption and regeneration modes of operation.

With a two bed system, the entire wet gas or liquid stream flows through the particular bed which is in the adsorption. Simultaneously, the bed which is in the regenerating, is being reactivated by flowing hot gases from various sources through bed for a specific period of time (heating period). This is followed by a cooling phase in order to make it ready for further adsorption.

Our capability in Gas and Liquid dehydration system.

A) Removal of water, carbon dioxide and Hydrogen Sulfide from gases such as

Air  Chlorine Methane
Hydrogen Ammonia Methylene Chloride
Oxygen Carbon Dioxide Mixed Hydrocarbon Gases
Nitrogen Carbon Monoxide Natural Gas
Argon Mixed Gases Propane
Acetylene Butadiene Propylene
Butane Ethane Sulfar Dioxide
Ethers Ethylene Hellium

B) Removal of water from solvents such as:

Acetone Toluene Benzene
Xylene Methanol Trichloroethylene
Ethanol Isopropanol Cyclonexane

C) Removal of water, carbon dioxide, and sulfur from liquefied petroleum gases.

Propane Ethane Heptane
Butane Ethylene Isobutane
Isopentane Naphtha Pentane
Hexane Propylene Kerosene

 

VARIOUS GAS/LIQUID DRYERS OPTIONS




Purge gas regeneration.

Counter current heating and Cooling.
Low dew point regen gas preferable.

Purge gas regeneration.
Co-Current heating and cooling.

 

Closed loop regeneration.
Counter current heating and Co-Current Cooling.
Saving on regeneration gas.


Closed loop regeneration.
Counter current heating. Co-Current cooling.


Dry gas regeneration.
Counter-current heating and co-current cooling.

Split stream.                              
Counter current heating and co-current cooling.  
Wet gas regeneration.


Dry gas regeneration.
Regeneration gas at different pressure.
Counter current heating and cooling.

Split stream.
Wet gas regeneration.
Counter-current or co-current heating and cooling.


Three bed configuration.
To reduce bed height.
To have flexibility.

Lead/guard configuration.
Lead bed is operated up to the complete equilibrium to remove olefin/di-olefins.
Good system to be used for contaminated gas.

 

Liquid dryer.
Regeneration with dry nitrogen.
Nitrogen can be recycled in a "semi closed loop."

Liquid dryer-single tower.
Regeneration with wet natural gas.





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