Dürr VOC abatement: The Right Process for Ideal Emission Control

The pharmaceutical, chemical and petrochemical industries in particular, as well as carbon-fiber production and recycling plants, produce exhaust gases and residual liquids with high or low calorific values. These wastes can include problematic, environmentally hazardous constituents such as halogenated hydrocarbons, sulfur, phosphorous, and NOx, etc., and could be present in the form of explosive mixtures. The Ecopure^® VAR direct fired thermal oxidizer is designed for cleaning and incinerating such gases and residues.

Waste gases and residual fluids are fed into a combustion chamber equipped with a high-temperature-resistant lining. This is done, as required; via one or more exhaust air devices, double or multiple lances. The hydrocarbons are converted mostly into water vapor and carbon dioxide in the combustion chamber at temperatures from 800 to 1,300 °C. Substances such as HCl and SO2, which can also be formed during combustion, are eliminated in downstream fume scrubbers when necessary.

Heat can be recovered by producing hot air, hot water, steam or thermal oil. When substances forming NOx are treated, the SNCR (selective non-catalytic reduction) process integrated in the combustion chamber or the SCR process downstream of combustion is used.

The VAR direct fired thermal oxidizer is available in various versions, depending on the composition of the pollutants:

• For Substances Containing Nitrogen
• Acid Recovery
• Inorganic Constituents (e.g. HCl, SO2 or Dust)
• salty liquid waste
• Explosive Exhaust Gases
• Acid-Forming Constituents

The range of services runs from conception through realization as a turnkey project and on to plant support.

Heat recovery
The hot flue gases from a VAR plant can be used for production processes. For this purpose, the flue gases are cooled in suitable heat exchangers and their thermal energy is used to produce steam, hot water or electrical energy or to heat thermal oil or air.

At certain preconditions, Dürr also offers more technologies for a sustainable usage of energy power generation e.g. power generation through ORC or micro gas turbines.

For further information please visit our product website, download our product brochure or request information now!