CYMIC{reg_sign} -- Boiler scale-up and full scale demonstration experiences

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:245012

Kokko, A ^[1]; Karvinen, R; Ahlstedt, H ^[2]

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1. Tampella Power Inc., Tampere (Finland)
2. Tampere Univ. of Technology (Finland)

This paper describes the CYMIC boiler scale-up principles, first full scale experiences from demonstration plant and results from mathematical modelling of the cyclones. CYMIC pilot testing was successfully completed with very positive results, the next step was a CYMIC scale-up and full scale demonstration. The 30 MWth demonstration plant was commissioned during the fall of 1994. The plant is owned by VAPO Oy and it is in the city of Lieksa, eastern Finland. The CYMIC has been scaled up by developing six different cyclones and the multiplication system to cover the capacity range from 30 to 600 MWth. The design of this CYMIC series and the first sold industrial scale CYMIC are presented in the paper. The scale-up of the cyclone was mathematically modelled by Professor Karvinen and his group at Tampere University of Technology. The model which uses Sflow-code was tested and the parameters were set using the pilot test results. The model operated well, so three bigger cyclones were calculated. The first was the cyclone for the Lieksa plant and the other two were bigger standard cyclones. Particles were also included in the model. The variables in the calculations were the cyclone diameter, inlet vane shape and position. Commissioning of the Lieksa plant began in August 1994. The process including operation of the cyclone and the gaslock were then verified at full scale. Flue gas emissions, the combustion efficiency and the performance of the cyclone were also measured. This paper discuss the most interesting results of the measurements.

• OSTI ID: 245012
• Report Number(s): CONF-950522--; ISBN 0-7918-1305-3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
09 BIOMASS FUELS
AIR POLLUTION
AIR POLLUTION CONTROL
CARBON MONOXIDE
CIRCULATING SYSTEMS
COAL
CYCLONE SEPARATORS
DEMONSTRATION PLANTS
DESIGN
FLOW VISUALIZATION
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
FLY ASH
MATHEMATICAL MODELS
NITROGEN OXIDES
NITROUS OXIDE
OPERATION
PEAT
PERFORMANCE
THERMAL EFFICIENCY
WOOD WASTES