Study of Bed Material Agglomeration in A Horizontal Circulating Fluidized Bed Boiler Burning Rice Husk
Paper in proceedings, 2012

During combustion of potassium containing biomass, there is a risk for bed material agglomeration when using circulating fluidized bed boilers (CFB). Tsinghua University has developed a new type of CFB Boiler, a so called horizontal circulating fluidized bed boiler (HCFBB). Instead of having one high combustion chamber, it consists of three combustion chambers with low height but placed in parallel horizontally. The alkali related bed material agglomeration was studied in one of such boilers in Xiamen, China, burning rice husk. Ash samples from the bottom of the bed, from the bottom of the join part of the secondary and burnout chamber and from the cyclone have been taken and they have been studied by SEM-EDX analysis. The results show some interesting correlation among potassium, aluminum, phosphorus. The collection of deposit on heat exchange tubes in the convection section of the boiler was attempted using a deposit probe situated in the flue gas channel during combustion, however no deposit was formed.

Bed Material Agglomeration

Horicontal Cisculating Fluidized Bed Boiler

Alkali

Biomass

Author

Dongmei Zhao

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Jesper Pettersson

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Britt-Marie Steenari

Chalmers, Chemical and Biological Engineering

Lars-Erik Åmand

Chalmers, Energy and Environment, Energy Technology

Yanguo Zhang

Qinghai Li

Proceedings of the 21:st International Conference on Fluidized Bed Combustion

Driving Forces

Sustainable development

Subject Categories

Other Engineering and Technologies not elsewhere specified

Chemical Engineering

Chemical Sciences

Areas of Advance

Energy

More information

Latest update

10/15/2018