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Lowest emission values and low energy demand

Waste air purification

Waste Air Purification

The SAACKE product portfolio includes both individual and complete solutions for waste air purification with simultaneous energetic use in disposal of exhaust air and exhaust vapors. The main goals are to minimize the energy requirement for heating the exhaust air and reduce the relevant emission values. SAACKE has the right products, the necessary experience and comprehensive engineering know-how to achieve these goals.

The SAACKE portfolio includes:

  • Turnkey systems with burners, combustion chambers and downstream waste heat boilers
  • Firing systems for use with exhaust air with low odor load

Energy-efficient products and special engineering

SAACKE solutions combine waste air purification with use of heat produced in the process. The odor-laden exhaust air is heated and post-combusted. The heat produced in the process is used thermally in a downstream boiler. Exhaust air, for example from sites that process meat products and potatoes, is not just disposed of, but also replaces other energy sources by supplying process heat.

SAACKE offers you the complete package for thermal waste air purification. Our engineers plan and optimize the entire process, which frequently consists of an SSB series burner, a combustion chamber and a downstream waste heat boiler. The burner combusts standard or special fuels and features outstanding mixing properties for combustion air and exhaust air. This makes it possible to significantly reduce the amount of fuel needed to oxidize the pollutants. A waste heat boiler is located downstream from the combustion chamber. This makes it possible to use the heat produced by post-combustion of the exhaust air for the entire process.

This complete solution minimizes the emission values of carbon monoxide, NOx as well as uncombusted hydrocarbons: the environmentally friendly and efficient solution for your waste air purification.

Using exhaust air as combustion air

Some processes generate only small quantities of exhaust air, so that there is no need to use a combustion chamber with a downstream waste heat boiler. Instead the SSB burner with a special muffle can be installed on a boiler, for example on a shell boiler. The exhaust air is directed tangentially into the muffle with reduced pressure need.

If the exhaust air contains only small amounts of odorous substances, small amounts of exhaust air can be used as combustion air, thus replacing in part the use of additional fresh air. SAACKE engineers are also responsible in this case for controlling the ratio of fresh air – of course always with the overall plant in view.

SAACKE also offers a solution for disposal of the exhaust vapors in very heavy exhaust air, for example in animal carcass disposal plants. This highly laden exhaust air, which is rich in water vapor and odorous substances and has a very low heat value, is directed into the combustion chamber. In these cases the accumulated animal fat is then often used as a less expensive fuel with an SKVG series burner.

Where is waste air purification used?

Waste air purification is used to remove unpleasant odors from odor-laden exhaust air before it is released into the environment, for example in the food industry, chemical industry or refineries.

There are essentially two processes for purifiying waste air: thermal and biological waste air purification. The advantage of the first process is that it can be used even with a fluctuating composition of exhaust air and with large quantities of exhaust air. For thermal waste air purification, the exhaust air is heated to over 750°C because odor-laden organic substances do not oxidize into CO2 and water with a sufficient dwell time in the combustion chamber until this temperature is exceeded. The challenge is thus to reach high temperatures with the lowest possible expenditure of energy. Therefore each plant must be considered individually based on qualified engineering backed up by experience.