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A steam dried municipal solid waste gasification and melting process
State Key Laboratory of Clean Energy Utilization, Zhejiang University.
Thermo-Energy Engineering Research Institute, School of Energy and Environment, Southeast University, Nanjing.
State Key Laboratory of Clean Energy Utilization, Zhejiang University.
State Key Laboratory of Clean Energy Utilization, Zhejiang University.
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2011 (English)In: Frontiers of Environmental Science & Engineering in China, ISSN 1673-7415, E-ISSN 1673-7520, Vol. 5, no 2, p. 193-204Article in journal (Refereed) Published
Abstract [en]

Considering high-moisture municipal solid waste (MSW) of China, a steam dried MSW gasification and melting process was proposed, the feasibility was tested, and the mass and energy balance was analyzed. Preliminary experiments were conducted using a fixed-bed drying apparatus, a 200 kg per day fluidized-bed gasifier, and a swirl melting furnace. Moisture percentage was reduced from 50% to 20% roughly when MSW was dried by slightly superheated steam of 150A degrees C-350A degrees C within 40 min. When the temperature was less than 250A degrees C, no incondensable gas was produced during the drying process. The gasifier ran at 550A degrees C-700A degrees Cwith an air equivalence ratio (ER) of 0.2-0.4. The temperature of the swirl melting furnace reached about 1240A degrees C when the gasification ER was 0.3 and the total ER was 1.1. At these conditions, the fly ash concentration in the flue gas was 1.7 g center dot(Nm(3))(-1), which meant over 95% fly ash was trapped in the furnace and discharged as slag. 85% of Ni and Cr were bound in the slag, as well as 60% of Cu. The mass and energy balance analysis indicates that the boiler heat efficiency of an industrial MSW incineration plant reaches 86.97% when MSW is dried by steam of 200A degrees C. The boiler heat efficiency is sensitive to three important parameters, including the temperature of preheated MSW, the moisture percentage of dried MS Wand the fly ash percentage in the total ash.

Place, publisher, year, edition, pages
2011. Vol. 5, no 2, p. 193-204
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-10677DOI: 10.1007/s11783-010-0268-0ISI: 000291252500006Scopus ID: 2-s2.0-79958051830Local ID: 984d3a48-781c-4276-95a7-6fe60d78366aOAI: oai:DiVA.org:ltu-10677DiVA, id: diva2:983623
Note

Validerad; 2011; 20110620 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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