Reduction of PCDD/PCDF emissions from a waste incineration facility by a full scale DeNox-unit

Boos, R.; Scheidl, Katharina S.; Prey, Theodor; Wurst, Friedrich Martin; Kuna, R.-P.

doi:10.1016/0045-6535(91)90068-o

Cited by 6 publications

(1 citation statement)

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“…The combinations of dry scrubber/fabric filter (16), wet scrubber/fabric filter (17,18), or spray absorber/ESP (19) and wet gas scrubbing (20) have also been used successfully to decrease PCDD/F emissions. PCDD/F reduction accompanied with NOx reduction by ammonia injection (21) or ammonia radical injection and by using SCR unit or some other DENOX unit are well-known methods for PCDD/F reduction (22)(23)(24)(25). The injection of different sorbents and absorption materials to the flue gases are also potential methods for reducing the emissions of PCDD/Fs and related compounds.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gaseous Inhibitors on PCDD/F Formation

Ruokojärvi

Halonen

Tuppurainen

et al. 1998

Environ. Sci. Technol.

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Emissions of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) from municipal waste incineration are currently a subject of considerable public concern because of their extreme toxicity. PCDD/F formation in incineration processes is being studied widely, but studies on inhibition are quite sparse, especially in a pilot-plant scale. In this work, the effect of four gaseous inhibitors (sulfur dioxide, ammonia, dimethylamine, and methyl mercaptan) on PCDD/PCDF formation in the combustion of liquid fuel was studied using a pilot-scale plant. The inhibitors were injected into the flue gas stream after the first economizer at a temperature of 670 °C and just before the second economizer at 410 °C. Both the chlorophenol and PCDD and PCDF concentrations decreased when inhibitors were added. Particle-phase PCDD/F concentrations in particular decreased by up to 98%. The results suggest that the formation of PCDD/Fs is hindered in the particle phase at the early stages of the PCDD/F formation chain, probably even before precursors such as chlorophenols have been formed.

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