Chemische Technik, Vol.48, No.2, 71-77, 1996
Combustion of chlorinated hydrocarbons in hydrogen chloride plants
Object of this work is to recover hydrochloric acid by combusting waste, which contains chlorinated hydrocarbons (CHCs), in hydrogen chloride burners. Hydrochloric acid, which is free of chlorine and soot, is obtained only if a precisely defined mixture of gases is fed to the burner. Because of the fuel-rich conditions the waste gas contains a high concentration of carbon monoxide. Therefore it has to be treated e.g. by means of afterburning to observe the emission value. A turbulent flame burner mixing gases and CHCs prevents formation of hazardous organic compounds effectively. At optimised conditions the flame exhibits a high destruction efficiency. The concentration of any detected CHC in the raw gas is distinctly below 1 mg/m(3). If pure oxygen is provided, the emission value according to the 17th Ordinance under the Federal Imission Control Act (17. BlmSchV) for PCDD/F is maintained. The hydrochloric acid produced is not lowered in quality.
Keywords:WASTE