Original title: Fluidní spalování suchého stabilizovaného čistírenského kalu v režimu oxy-fuel.
Translated title: Fluidized-bed Combustion of Dry Stabilized Sewage Sludge in Oxy-fuel Mode
Authors: Moško, Jaroslav ; Pohořelý, Michael ; Durda, Tomáš ; Zach, Boleslav ; Šyc, Michal ; Svoboda, Karel
Document type: Papers
Conference/Event: Sborník přednášek konference CHEO 11, Praha (CZ), 20160907
Year: 2016
Language: cze
Abstract: [cze] [eng]
Tento příspěvek popisuje vliv provozních parametrů na koncentraci NOx, N2O a SO2 ve spalinách (plynu opouštějícím reaktor) ze spalování suchého anaerobně stabilizovaného čistírenského kalu v reaktoru se stacionární fluidní vrstvou v simulovaném režimu oxy-fuel. Bylo zjištěno, že s rostoucí teplotou spalování od 750 °C do 930 °C ve spalinách roste koncentrace NOx a klesá koncentrace N2O. Dále bylo zjištěno, že koncentrace SO2 ve spalinách s rostoucí teplotou nejdříve klesá a pak roste, kdy nejnižší koncentrace byla při teplotě kolem 810 °C. Současně bylo zjištěno, že s rostoucím obsahem kyslíku ve spalovacím médiu klesají emise NOx a rostou emise SO2. Sewage sludge is an inevitable waste stream from wastewater treatment and its disposal is complicated due to specific characteristics of its composition. Sewage sludge combustion/incineration is the only suitable way for disposal of large volumes of sewage sludge containing POPs and some heavy metals. Sewage sludge combustion reduces the volume of such waste and causes destruction of organic contaminants. Oxy-fuel combustion is a technology for simplifying CO2 sequestration from the flue gas by using nearly pure oxygen instead of air for the combustion. In order to control the combustion temperature, part of the flue gas is recycled to combustion chamber. The paper brings information about investigation of the effects of combustion temperature and concentration of oxygen in inlet combustion media on the emissions of NOx, N2O and SO2 in FB combustion of sewage sludge. The experimental results have shown that an increase in combustion temperature leads to an increase in NOx and to a decrease in N2O emissions in the temperature range 750–930 °C. The lowest SO2 emissions were measured in the temperature interval from 800 to 820 °C in all experiments with different oxygen concentration in inlet gas. It was found that when the oxygen concentration in inlet gas increased, the emissions of SO2 increased while emissions of NOx slightly decreased.
Keywords: fluidized-bed combustion; oxy-fuel; sewage sludge
Project no.: TE02000236 (CEP)
Funding provider: GA TA ČR
Host item entry: Sborník přednášek konference CHEO 11, ISBN 978-80-7080-971-6
Note: Související webová stránka: http://cheo.vscht.cz/home?cookie%5Bonly_desktop%5D=
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.

Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: http://hdl.handle.net/11104/0264173

Permalink: http://www.nusl.cz/ntk/nusl-261511


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