Direct and indirect air heating for the pharmaceutical industry

Air Solutions Holland designs and supplies direct and indirect fired air heaters for the pharmaceutical industry. All kinds of process steps often require warm, sometimes even hot air. The most efficient way of heating is of course directly with a gas or oil burner, but the combustion air is then mixed with the process air to be heated. For some processes this is not advisable because of the combustion residues that may come into contact with the pharmaceutical end product.

To prevent this contamination Air Solutions Holland has developed an indirect heating system that also works with fuels such as natural gas, biogas or diesel and even fuel oil. However, the process air never comes into contact with the flue gases that are discharged directly to the outside via the chimney.

The unique shape and design of the combustion chamber in combination with the flue gas heat exchanger gives an enormously high efficiency. The combustion air is cooled down as much as possible in the flue gas heat exchanger and even condensed to transfer extra energy to the process air stream. In this case, the combustion chamber and flue gas heat exchanger are made of stainless steel to prevent unwanted corrosion. The combustion chamber can be built into various components, from air handling unit to duct version to room circulation unit. Ideal for locations or processes where there is no hot water or steam available as a heating medium. The indirect air heaters are also used to keep large production halls at a desired temperature in winter.

• Capacity range from 40 to 4,000 kW
• Capacity is adjustable in steps
• Process air volume up to 200,000 m³/h
• Air recirculation, outside air or mixed air system possible
• High efficiency, up to 96% of energy value transferable
• Including complete gas control line