Contact us
 |
[email protected] |
 |
3275638434 |
 |
 |
| Paper Publishing WeChat |
Useful Links
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Removal of Acid Gases in an Incinerator of Hospital Waste
Author(s)
Václav Veselý1, Petr Jirsa2, Zbyszek Szeliga3 and Dušan Kovač4
Full-Text PDF
XML 530 Views
DOI:10.17265/1934-8975/2016.11.005
Affiliation(s)
1. Institute of Chemical Processes Fundamentals of the CAS, v.v.i., Prague 6,16502, Czech Republic
2. SMS CZ Rokycany, Rokycany-Střed, 337 01, Czech Republic
3. VŠB Technical University Ostrava-CENET, Ostrava-Poruba, 708 00, Czech Republic
4. Czech University of Life Sciences, Prague 6, 16512, Czech Republic
ABSTRACT
At combustion of hospital waste numerous harmful pollutants were formed inclusive
persistent PCDD/F (polychlorinated
dibenzodioxines and dibenzofuranes) compounds. To eliminate these substances an existing incinerator consisting
of the furnace heat exchanger with flue gas cleaning was used. This incinerator
had a capacity of 250 kg of waste per hour. Elimination od acid gases was executed
by dosing of solid sorbents (calcium hydrate and bicarbonate) at two points of the
waste gases duct. Local temperatures of waste gases at these two points were different.
Sorbents were dosed at different distances from the textile filter by which ash
and sorbent were separated from the stream of waste gases. By this arrangement it
was possible to alter the residence time of sorbents in waste gases. The effect
of addition of bicarbonate on dechlorination and desulphurisation was also studied.
The executed experiments indicated that at dosing of calcium hydroxide into waste
gases at higher temperatures sulphur oxides reacted preferably to hydrogen chloride.
The strong effect of HCl in waste gases on formation of PCDD/F was proved. For sufficient
elimination of persistent compounds from waste gases it was necessary to add beside
calcium hydrate also active carbon. Two types of sorbents based on carbon were tested,
namely Norit and Chezacarb B. Both were macroporous. Chezacarb B was
carbon black from the process of hydrogen production by partial oxidation. Efficiency
of both sorbents for removal of PCDD/F was similar.
KEYWORDS
PCDD/F, adsorption, desulphurisation, dechlorination, active carbon.
Cite this paper
References