Open AccessAgglomeration of bed material: Influence on efficiency of biofuel fluidized bed boiler
Author(s) -
A Georgy Ryabov,
S Dmitry Litoun,
P Eduard Dik
Publication year - 2003
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci0301005r
Subject(s) - boiler (water heating) , economies of agglomeration , waste management , drum , environmental science , combustor , flash boiler , fluidized bed combustion , fluidized bed , boiler blowdown , fly ash , combustion , steam drum , engineering , mechanical engineering , superheated steam , chemistry , organic chemistry , chemical engineering , inlet
The successful design and operation of a fluidized bed combustor requires the ability to control and mitigate ash-related problems. The main ash-related problem of biomass filing boiler is agglomeration. The fluidized bed boiler with steam capacity of 66 t/h (4 MPa, 440 °C) was started up at the Arkhangelsk Paper-Pi dp-Plant in 2001. This boiler was manufactured by the Russian companies "Energosofin" and "Belenergomash" and installed instead of the existing boiler with mechanical grate. Some constructional elements and steam drum of existing boiler remained unchanged. The primary air fan was installed past the common air fan, which supply part of the air into 24 secondary airports. First operating period shows that the bed material is expanded and then operator should increase the primary air rate, and the boiler efficiency dramatically decreases. Tills paper presents some results of our investigations of fuel, bed and fly ash chemical compositions and other characteristics. Special experiments were carried out to optimize the bed drain flow rate. The influence of secondly air supply improvement on mixing with the main flow and boiler efficiency are given