Influence of memory effect caused by aged bag filters on the stack PCDD/F emissions

Li, Hsing-Wang; Wang, Lin‐Chi; Chen, Chun‐Chi; Yang, Xiaoyun; Chang-Chien, Guo-Ping; Wu, Edward Ming-Yang

doi:10.1016/j.jhazmat.2010.10.025

Cited by 65 publications

(36 citation statements)

References 32 publications

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“…The HCl concentration increased during normal operation, related to the release of chlorine in hazardous waste. CO concentration is a good indicator for the sum of the PAH (Blumenstock et al, 2000), which can be co-formed by similar mechanisms with PCDD/Fs (Blumenstock et al, 2000), and PAH memory effect like those of PCDD/Fs that release from APCDs and flue duct ash have also been observed (Chang and Lin, 2001;Zimmermann et al, 2001;Wang et al, 2007a;Li et al, 2011), so consequently CO concentration might be applied as good indicator of PCDD/F formation, despite the time delays affecting this link (Weber et al, 2002). CO concentrations were higher during start-up 1 and 2 when temperatures were still comparatively low, and then dropped significantly during start-up 3 and during normal operation, which implies wellcontrolled combustion conditions.…”

Section: Combustion Conditions and Gas Pollutants Emissionsmentioning

confidence: 96%

PCDD/F and PCBz Emissions during Start-up and Normal Operation of a Hazardous Waste Incinerator in China

Lin

Huang

Chen

et al. 2014

Aerosol Air Qual. Res.

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The PCDD/F emissions from incinerator start-up are a major contributor to the total amount of such emissions, as has been reported in studies of numerous municipal solid waste incinerators. However, very few studies have examined the start-up process at hazardous waste incinerators (HWIs). In this work we studied the emissions of PCDD/Fs and other pollutants, such as PCBz, at the stack during start-up and normal operations in a HWI. We found that the PCDD/F emissions during start-up were greater than during normal operations, and were comparable to the annual emissions during the normal combustion regime. The emissions of PCDD/Fs were highest during start-up when the temperature was around 500°C, reaching 59.5 ng/Nm 3 (5.49 ng I-TEQ/Nm 3 ) when no APCDs were applied. The emission values of PCDD/Fs during start-up with the application of APCDs and during normal operations were very low, which indicates the importance of APCDs when starting up a HWI, as well as before feeding waste. The chlorination degree, the ratio of PCDFs/PCDDs and the congener profiles were also discussed during start-up and normal operations, with the results suggesting different formation mechanisms of PCDD/Fs. PCBz emissions are two or three orders of magnitude higher than those of PCDD/Fs, and 1,2,4,5-TeCBz was the best correlated PCBz used as a PCDD/F indicator in real HWI flue gas.

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Section: Combustion Conditions and Gas Pollutants Emissionsmentioning

confidence: 96%

PCDD/F and PCBz Emissions during Start-up and Normal Operation of a Hazardous Waste Incinerator in China

Lin

Huang

Chen

et al. 2014

Aerosol Air Qual. Res.

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“…The elevated PCDD/F emissions during start-up procedures of incinerators have been attributed to incomplete combustion of diesel and feeding wastes, state of cleaning of boiler section as well as furnace temperature passing through PCDD/F formation window inevitably (Wang et al, 2007). Consequently, high PCDD/F emission during start up procedure will result in de novo based memory effect, that is, the surfaces of the boiler and pipe are contaminated by soot particles containing high PCDD/F contents as well as hydrocarbons, which improve PCDD/F formation via de novo synthesis of at these locations (Li et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Reduction of Persistent Organic Pollutant Emissions during Incinerator Start-up by Using Crude Waste Cooking Oil as an Alternative Fuel

Chen

Lee

Mwangi

et al. 2017

Aerosol Air Qual. Res.

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Illegal harvesting and recycling of waste cooking oil, also referred to as "gutter oil" in many countries, poses a great food safety threat. Thus, in this study the feasibility of using waste cooking oil as an auxiliary fuel in the furnace of laboratory waste incinerator was evaluated in terms of toxic pollutant emissions. Two fuel blends (W20D80 and W40D60) were blended from varying proportions of diesel fuel (D100), and waste cooking oil (W100) and their physio-chemical characteristics were subsequently determined and compared. Thermogravimetry analysis (TGA) and derivative thermogravimetry (DTG) of D100, W100, W20D80 and W40D60 showed that diesel fuel consist of more volatile short aliphatic hydrocarbons, while the waste cooking oil and its blends had more thermal stable unsaturated long chain molecules. After the de novo synthesis window of 200-400°C, 40% of waste cooking oil and 60% of diesel (W40D60) was injected at around 500-700°C, and reduced the toxicity concentrations of PCDD/Fs and PCBs by an average of 86% and 94%, respectively. This study demonstrated that, by using waste cooking oil as a fuel blend, not only can reduce the possibility of "gutter oil" being put in the food to damage the health of human beings, but also can be recycled as a kind of green fuel to reduce the emissions of persistent organic pollutants (POPs).

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“…"Dioksinler" olarak adlandırılan ve PCDD/Fs şeklinde kısaltılan bu kirletici grubunun en toksik 17 17 PCDD/Fs konjenerinin atık yakma tesislerindeki gaz akışlarındaki varlığı ilk olarak Olie vd.…”

Section: Introductionunclassified

“…Bir arada ya da ayrı ayrı gerçekleşebilecek olan bu iki mekanizma sonucunda oluşan ilave oluşumlara ilişkin olarak atık yakma tesisleri üzerinde kurulu bulunan soğutma ve APCD ekipmanları için ayrı ayrı veya bir arada değerlendirmeler sunan bazı çalışmalar mevcuttur. Sözü edilen APCD ekipmanları için yapılan çalışmalar; boiler ve economizer gibi soğutma araçları [13,14], ıslak yıkayıcılar [15], aktif karbon enjeksiyonu sonrası üniteler [16], bez filtreler [17], aktif karbon yatakları (AC) [18] ve elektrostatik çöktürücüler (ESP) [10] şeklinde örneklendirilebilir. Bununla birlikte sistem üzerinde kurulu bulunan APCD ekipmanlarının her hangi bir "memory effect" etkisinin görülmediğini belirten Tejima vd.…”

Section: Introductionunclassified

Tehli̇keli̇ Atik Yakma Tesi̇sleri̇ni̇n Duruş Peri̇yodunda Gaz Akişi PCDD/F Emi̇syonlari: İzaydaş İçi̇n Bi̇r Araştirma

Korucu¹

2017

deufmd

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Özet: Bu çalışmada, Türkiye'nin ilk tehlikeli atık yakma tesisi olan İZAYDAŞ'ın bir duruş periyodundaki PCDD/Fs emisyonları incelenmiştir. Bu amaçla, tesisin bir duruş periyodunun 3 farklı sıcaklık rejimi için atık gaz akımından alınan numuneler gaz ve partikül faz konsantrasyonları için ayrı ayrı analiz edilmiştir. Örneklemeler, her bir sıcaklık rejimi için boiler çıkışı, elektrostatik filtre çıkışı, yıkayıcı çıkışı ve aktif karbon ünitesi çıkışı olmak üzere 4 farklı noktada gerçekleştirilmiştir. Çalışmada elde edilen bulgular, duruş periyodundaki emisyon davranışlarının yalnızca normal işletim periyodu değil işletmeye alma periyotlarındaki davranışlardan da önemli oranda farklı olabildiğini işaret etmektedir. Özetle, tesisin farklı işletim koşullarında farklı yönetim stratejileri uygulamak yöneticiler için bir zorunluluk olarak görünmektedir. PCDD/F Emissions of Gas Stream at Shutdown Period of HazardousWaste Incinerators: A Case Study for IZAYDAS Keywords Waste Incineration, Dioxins, Shutdown Period, "Memory Effect"Abstract: In this study, it was investigated that PCDD/Fs emissions of a shutdown period of the IZAYDAŞ which is the first hazardous waste incinerator of Turkey. For this purpose, the samples of the waste gas stream obtained in three different temperatures of a shutdown period of the facility were analyzed for the gas and the particulate phase concentrations separately. Samplings were obtained from four different points like boiler outlet, electrostatic filter outlet, scrubber outlet, and activated carbon bed outlet, for every temperature regimes. The findings indicated that the emission characteristics of the shutdown periods of the facility could be different from not only the characteristics of the normal operations but also the startup periods of the same facility. In conclusion, to perform different management strategies for different operation conditions of the facility seems like an obligation for the managers.

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Influence of memory effect caused by aged bag filters on the stack PCDD/F emissions

Cited by 65 publications

References 32 publications

PCDD/F and PCBz Emissions during Start-up and Normal Operation of a Hazardous Waste Incinerator in China

PCDD/F and PCBz Emissions during Start-up and Normal Operation of a Hazardous Waste Incinerator in China

Reduction of Persistent Organic Pollutant Emissions during Incinerator Start-up by Using Crude Waste Cooking Oil as an Alternative Fuel

Tehli̇keli̇ Atik Yakma Tesi̇sleri̇ni̇n Duruş Peri̇yodunda Gaz Akişi PCDD/F Emi̇syonlari: İzaydaş İçi̇n Bi̇r Araştirma

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