scholarly journals Three-Dimensional Modelling on the Hydrodynamics of a Circulating Fluidised Bed

2009 ◽  
pp. 1-10
Keyword(s):  
Three Dimensional ◽  
Fluidised Bed ◽  
Circulating Fluidised Bed

Effects of pressure on flow regimes transition velocities and bubble properties in a pilot-scale pressurised circulating fluidised bed

2021 ◽  
Vol 410 ◽  
pp. 128438
Author(s):  
Xiaoli Zhu ◽  
Pengfei Dong ◽  
Zhiping Zhu ◽  
Raffaella Ocone ◽  
Wuqiang Yang ◽  
...  
Keyword(s):  
Flow Regimes ◽  
Pilot Scale ◽  
Fluidised Bed ◽  
Circulating Fluidised Bed ◽  
Bubble Properties

Operation of a Circulating Fluidised Bed Biomass Gasifier

2004 ◽  
Author(s):  
Guanyi Chen ◽  
Gang Li ◽  
Michel P. Glazer ◽  
Chunlei Zhang ◽  
J. Andries
Keyword(s):  
Large Scale ◽  
Fixed Bed ◽  
Calorific Value ◽  
Producer Gas ◽  
Fluidised Bed ◽  
Fuel Gas ◽  
Promising Alternative ◽  
Tar Cracking ◽  
Shift Reaction ◽  
Circulating Fluidised Bed

Energy generation from the use of biomass is gaining an increasing attention. Gasification of biomass at present, is widely accepted as a popular technical route to produce fuel gas for the application in boilers, engine, gas/micro turbine or fuel cell. Up to now, most of researchers have focused their attentions only on fixed-bed gasification and fluidised bed gasification under air-blown conditions. In that case, the producer gas is contaminated by high tar contents and particles which could lead to the corrosion and wear of blades of turbine. Furthermore, both the technologies, particularly fixed bed gasification, are not flexible for using multiple biomass-fuel types and also not feasible economically and environmentally for large scale application up to 10∼50 MWth. An innovative circulating fluidised bed concept has been considered in our laboratory for biomass gasification thereby overcoming these challenges. The concept combines and integrates partial oxidation, fast pyrolysis (with an instantaneous drying), gasification, and tar cracking, as well as a shift reaction, with the purpose of producing a high quality of gas, in terms of low tar level and particulates carried out in the producer gas, and overall emissions reduction associated with the combustion of producer gas. This paper describes our innovative concept and presents some experimental results. The results indicate that the gas yield can be above 1.80Nm3/kg with the calorific value of 4.5–5.0MJ/Nm3, and the fluctuation of the gas yield during the period of operation is 3.3%–3.5% for the temperature of 750–800 °C. In genera, the results achieved support our concept as a promising alternative for the gasifier coupled with micro/gas turbine to generate electricity.

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