Advanced drying systems heated with sludge granulate as fuel

• Autorzy: Hohnecker H. , Krebs G.
• Konferencja: Proceedings of the German-Chinese-Polish Symposium Environmental Engineering
• Języki publikacji: EN

Abstrakty

EN

The paper deals with the optimum features of a sewage sludge drying system and outlines ED directives on the use of organic substances. Details of two sludge drying systems are presented. Obringheim, Germany was built for a community, which accepts also dewatered sludge from other local sewage systems. This is an advanced drying technology, which combines sewage sludge drying and hot gas production in a cyclone furnace. The dried granulate is burnt directly in the cyclone furnace, the hot gas thus produced is reused for drying. The fluidized bed dryer is indirectly heated via a heat exchanger. The cyclone furnace off-gas and also the uncondensated dryer gases are treated and the values of the German off-gas (17th BIMSchV) standards are not only met but some actual values are far better. The plant in Pecs, Hungary was originally designed as a drum dryer but was later supplemented with equipment for thermal granulate use (EcoDry). This was not a costly investment, only major units being added and in cooperation with local companies. The paper reports some, especially emission, data. The basics for supplementing existing sludge drying systems are explained, as are the possibilities of operating flexibly with variable calorific value of sludge feed.

Słowa kluczowe

EN

sludge drying systems; drying technology; fuels; organic substances; sludge granulate

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska
• Rocznik: 2003
• Tom: Vol. 291, z. 4
• Strony: 33--50
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Hohnecker H.

• HfT Stuttgart, Schellingstr. 24, 70174 Stuttgart

autor

Krebs G.

• HfT Stuttgart, Schellingstr. 24, 70174 Stuttgart

Bibliografia

• Hohnecker, H. G.: Thermische Schlammtrocknung unter dem Aspekt der umweltfreundlichen Verwertung des Trockenguts, Korrespondenz Abwasser 10/1987, 34. Jahrgang
• Hohnecker, H. G. / Krebs, G.: Praktische Versuche mit konvektiven Trocknern zur Herstellung von Futtermittel aus Groftmarktabfallen, 1988.
• Hohnecker, H. G.: Praxis der direkten und indirekten Trocknung von Klarschlammen - Abwagungsprozesse und Beurteilungen, awt Abwassertechnik 1992.
• Hohnecker, H. G.: Grundlagen und Stand der Entwicklung von Trommeltrocknern, Technische Akademie Wuppertal; 3/1991
• Hohnecker, H. G. / Todzi, K.: Konzeptstudie uber die Anwendung der Klarschlamm- Vergasung bei der Klarschlammtrocknung des AZV Wiesental, Baden-Wurttemberg, 1991
• Expertenanhórung Bundesumweltamt Berlin zu den Chancen der Trocknung und Verwertung von Klarschlammen, Berlin 1993.
• Expertenanhórung des Landes Vorarlberg, Ósterreich, zur ókologischen Verwertung von Klarschlammen, Bregenz 1994.
• Hohnecker, H. G.: „Materiał and thermical utilization of dried sludges - the worldwide stand of the art", Vortrag an der Beijing Polytechnic University 29.04.2002.
• Hohnecker, H. G.:„Advanced technics of sewage sludge drying in the year 2002", Lecture at Beijing University of Technology 08.10.2002.
• Hohnecker, H. G.: „Environmental hazard by physical utilization of sewage sludges ? - Historical development. balances and futurę prospects for China", Lecture at Beijing University of Technology 08.10.2002.