Direct Oxidizers


Direct oxidizers use a burner to preheat the incoming process air prior to entering the combustion chamber. The burner will provide enough energy to heat the process air to the combustion chamber temperature of ~1,400°F. In the combustion chamber, the VOC’s within the process exhaust will convert to CO2 and H2O. This 1,400°F air, now clean, will exhaust to the atmosphere. Direct thermal oxidizers can be designed in a vertical position or horizontal. Raw gas burners are common to reduce the overall energy consumption. A direct thermal oxidizer can be a low-cost solution for many applications.


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The TANN Advantage

  • Custom and standard direct oxidizer designs (5 SCFM to 20,000 SCFM)
  • Vertical or horizontal designs
  • 99%+ destruction efficiencies
  • Heat recovery options to utilize stack exhaust energy
  • Best warranty in the industry


  • Low Operating Hours – Low operating hours can keep the overall operating costs down.
  • Corrosive Environment – The oxidizer can be manufactured from corrosive resistant steels. The small footprint can keep the initial cost low.
  • High Solvent Concentration – Direct oxidizers are able to handle very high solvent concentrations, where other oxidizer technologies cannot.
  • Low Flow Rate – Direct oxidizers are common where the flow rate from the process exhaust is low, 5 to 1,000 SCFM. This low exhaust rate will keep the energy usage down and make the direct oxidizer the most economical solution.