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McWane UT Cupola 2011.JPG

Steady production with cost savings

Blast Air Dehumidification

Blast Air Dehumidification does exactly what its name implies: It takes the water out of your blast air. This saves energy and cost and provides a very stable operation that is not impacted by seasonal climate. Just consider having "winter air" all year round. 

Blast air dehumidification with desiccant wheel regeneration.

Why Blast Air Dehumidfication

Dehumidification offers a new range of performance for your cupola.

As the melting process is very much affected by the humidity of the blast air, the dehumidification allows for stable process conditions year-round.

How it Works

Similar to the dehumidification of large quantities of air for building air conditioning or drying processes, the blast air dehumidifier consists of a rotating desiccant wheel and is divided into two sealed sections. 

On one side, the blast air to be dehumidified passes through the dehumidifying wheel, and the moisture in the air is absorbed by the wheel. On the other side, the moisture absorbed in the wheel is removed with heated regenerative air. 

Honey-comb desiccant wheel is regenerated with waste heat energy from thermal-oil, or with natural gas.
Example of the desiccant media used in the dehumidification system

The energy to heat up the regenerative air to "dry out" the desiccant ideally comes from thermal oil, that has been used for process gas cooling.  For plants without thermal oil, natural gas combustion can provide a steady source of heat for this purpose.

The energy balance of drying air with natural gas, and the related coke-savings, is still advantageous compared to the higher coke rate in the charge during humid weather.


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