scholarly journals Axial Concentration Profiles and NO Flue Gas in a Pilot-Scale Bubbling Fluidized Bed Coal Combustor

2004 ◽  
Vol 18 (6) ◽  
pp. 1615-1624 ◽  
Author(s):  
Luís A. C. Tarelho ◽  
Manuel A. A. Matos ◽  
Fernando J. M. A. Pereira
Keyword(s):  
Fluidized Bed ◽  
Flue Gas ◽  
Pilot Scale ◽  
Concentration Profiles ◽  
Bubbling Fluidized Bed ◽  
Axial Concentration

Fireside Deposit Formation in Biomass Fired FBC: A Comparison Between Tests Performed in Three Significantly Different Sized Combustors

2003 ◽  
Author(s):  
Bengt-Johan Skrifvars ◽  
Patrik Yrjas ◽  
Mikko Hupa ◽  
Martti Aho ◽  
Jaani Silvennoinen ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Flue Gas ◽  
Pilot Scale ◽  
Full Scale ◽  
Small Scale ◽  
Deposition Rates ◽  
Stable Conditions ◽  
Bubbling Fluidized Bed ◽  
Main Components ◽  
Fluidized Bed Boilers

This paper deals with the prediction of ash related problems in fluidized bed boilers during co-firing of various bio-fuels. A study was performed where the slagging and fouling behavior was monitored in three different sized bubbling fluidized bed combustors, a 20 kW semi-pilot reactor, a 2 MW pilot-scale device and a 105 MW full-scale boiler. The aim of the study was to learn about how well slagging and fouling in a small-scale device compares to a full-scale boiler and to see how well the slagging and fouling can be predicted with a small-scale device. Various types of Scandinavian bio-fuels as well as peat were used both separately and mixed. From all three devices ash and deposit samples were collected during as uniform and stable conditions as possible. The fuels used in the three devices during the test campaigns were carefully chosen so that they would be as similar as possible. Bed, furnace and flue gas temperatures were monitored as well as flue gas emissions. The fuels, ashes and deposits were analyzed on their main components and deposition rates were calculated based on the deposit measurements. These data were finally used for assessing the slagging and fouling propensity of the fired fuel. The paper compares and discusses the results from the three different size classes.

Combustion Characteristics of Heavy Liquid Fuels in a Bubbling Fluidized Bed

2002 ◽  
Vol 124 (1) ◽  
pp. 40-46 ◽  
Author(s):  
E. J. Anthony ◽  
D. Y. Lu ◽  
J. Q. Zhang
Keyword(s):  
Heavy Metals ◽  
Fluidized Bed ◽  
Flue Gas ◽  
Liquid Fuel ◽  
Pilot Scale ◽  
Liquid Fuels ◽  
Feeding System ◽  
Fluidized Bed Combustion ◽  
Fuel Flexibility ◽  
Bubbling Fluidized Bed

Liquid fuels such as bitumen, tars, and pitches are byproducts of heavy oil upgrading processes, and are usually contaminated with high sulphur and sometimes heavy metals contents as well. Fluidized bed combustion (FBC) appears to be a promising technology for the combustion of such fuels due to its inherent fuel flexibility and low emissions characteristics. The combustion of three liquid fuels, i.e., no. 6 oil, bitumen and pitch was investigated in a pilot-scale bubbling FBC unit. An efficient liquid fuel feeding system was developed and a bubbling FBC was successfully used to combust all three liquid fuels. The proportion of fuel escaping in the form of unburnt hydrocarbons in the flue gas was less than 0.4 percent and combustion efficiencies higher than 98.5 percent were achieved. However, combustion of liquid fuels tended to occur in the freeboard and, therefore, good mixing of the fuels in the bed was critical in achieving satisfactory combustion performance.

Co-gasification of refused derived fuel and biomass in a pilot-scale bubbling fluidized bed reactor

2020 ◽  
Vol 206 ◽  
pp. 112476 ◽  
Author(s):  
D.T. Pio ◽  
L.A.C. Tarelho ◽  
A.M.A. Tavares ◽  
M.A.A. Matos ◽  
V. Silva
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Pilot Scale ◽  
Bubbling Fluidized Bed

Pollutant emissions in a bubbling fluidized bed combustor working in oxy-fuel operating conditions: Effect of flue gas recirculation

2013 ◽  
Vol 102 ◽  
pp. 860-867 ◽  
Author(s):  
L.F. de Diego ◽  
M. de las Obras-Loscertales ◽  
A. Rufas ◽  
F. García-Labiano ◽  
P. Gayán ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Flue Gas ◽  
Operating Conditions ◽  
Pollutant Emissions ◽  
Flue Gas Recirculation ◽  
Bubbling Fluidized Bed ◽  
Gas Recirculation ◽  
Fluidized Bed Combustor
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