Method for inhibiting the formation of dioxins
OwnerChristopher A. Hazen, James I. Myers +2inventors
InventorsChristopher A. Hazen, James I. Myers, Anand Srinivasan, Bernhard Wilhelm Vosteen
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Abstract
A method for reducing dioxin levels from a sludge disposal process comprising: (a) adding a halogenation supressant to a composition containing dioxin precursors, (b) incinerating the composition containing dioxin precursors, thereby forming a gaseous medium, (c) reducing heat in the gaseous medium formed in step (b), (d) removing ash from the gaseous medium, (e) adding an adsorbent to the gaseous medium formed in step (d), and (f) removing acid gases and particulates from the gaseous medium formed in step (e).
Claims20
A method comprising:
- (a) adding sulfur, or another halogenation suppressant, or mixtures thereof to a composition containing dioxin precursors,
- (b) incinerating the composition containing dioxin precursors, thereby forming a gaseous medium,
- (c) reducing heat in the gaseous medium formed in step (b),
- (d) removing ash from the gaseous medium,
- (e) adding an adsorbent to the gaseous medium formed in step, (d), and
- (f) removing acid gases and particulates from the gaseous medium formed in step (e).
A method comprising:
- (a) adding sulfur, or another halogenation suppressant, or mixtures thereof to a composition containing dioxin precursors that comprises (i) a wastewater treatment sludge (ii) solid organic residues and (iii) a mixture of halogenated solvents,
- (b) incinerating the composition containing dioxin precursors at a temperature that is at least about 800° C., thereby forming a gaseous medium,
- (c) reducing heat in the gaseous medium formed in step (b) to a temperature that is below about 200° C.,
- (d) removing ash from the gaseous medium,
- (e) adding activated powder to the gaseous medium formed in step (d) at a rate that is at least about 0.0007 kg, per about 100 m3 of gaseous medium,
- (f) removing acid gases and particulates from the gaseous medium formed in step (e).
Dependencies are inferred from the claim text.