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Further development of a mixed-dryer for wood biomass; Sekoituskuivurin jatkokehitys

Abstract

Imatran Voima Oy and IVO International Ltd are developing a new, advanced drying method for high moisture content fuels such as peat, biomass, and brown coal. The drying technology is based on using the heat of the fluidized bed directly for drying. The drying takes place at steam atmosphere, which makes it possible to recover the latent heat of evaporation back to process at high temperature level. This improves the thermal efficiency of the plant considerably. The technology is called bed mixing dryer. The pilot plant of the bed mixing dryer was built to IVO`s Kuusamo peat and wood fired power plant that was commissioned in the beginning of 1994. The Kuusamo district heating power plant has a fuel input of 27 MW that gives a power output of 6 MWe and district heat output of 17.5/21.2 MWth. As fuels are used peat, saw dust and wood wastes. The boiler is a bubbling fluidized bed boiler and the steam cycle is a conventional back pressure steam process. The unique feature in the plant is the new dryer that increases the overall thermal efficiency of the plant 10 to 15 units of percentage. In this project the operation and behaviour of  More>>
Authors:
Heinonen, O.; [1]  Parvio, E [2] 
  1. Imatran Voima Oy, Vantaa (Finland). Research and Development
  2. IVO International Oy, Vantaa (Finland)
Publication Date:
Dec 31, 1995
Product Type:
Technical Report
Report Number:
VTT-BIOENERGIA-11-Pt.3
Reference Number:
SCA: 090900; 010300; PA: FI-97:003068; EDB-97:019084; SN: 97001722296
Resource Relation:
Other Information: PBD: 1995; Related Information: Is Part Of Bioenergy Research Programme, Yearbook 1995. Utilization of bioenergy and biomass conversion; Alakangas, E. [ed.]; PB: 222 p.; Bioenergian tutkimusohjelma, vuosikirja 1995. Bioenergian kaeyttoe ja biomassan jalostus
Subject:
09 BIOMASS FUELS; 01 COAL, LIGNITE, AND PEAT; DRYERS; BIOMASS; DRYING; FLUIDIZED BED BOILERS; PEAT; WOOD; WOOD WASTES
OSTI ID:
419219
Research Organizations:
VTT Energy, Jyvaeskylae (Finland). Biofuels
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE97722473; CNN: Project TEKES-BIOENERGIA-Y308; ISBN 952-9500-77-7; TRN: FI9703068
Availability:
OSTI as DE97722473
Submitting Site:
FI
Size:
pp. 75-83
Announcement Date:
Feb 04, 1997

Citation Formats

Heinonen, O., and Parvio, E. Further development of a mixed-dryer for wood biomass; Sekoituskuivurin jatkokehitys. Finland: N. p., 1995. Web.
Heinonen, O., & Parvio, E. Further development of a mixed-dryer for wood biomass; Sekoituskuivurin jatkokehitys. Finland.
Heinonen, O., and Parvio, E. 1995. "Further development of a mixed-dryer for wood biomass; Sekoituskuivurin jatkokehitys." Finland.
@misc{etde_419219,
title = {Further development of a mixed-dryer for wood biomass; Sekoituskuivurin jatkokehitys}
author = {Heinonen, O., and Parvio, E}
abstractNote = {Imatran Voima Oy and IVO International Ltd are developing a new, advanced drying method for high moisture content fuels such as peat, biomass, and brown coal. The drying technology is based on using the heat of the fluidized bed directly for drying. The drying takes place at steam atmosphere, which makes it possible to recover the latent heat of evaporation back to process at high temperature level. This improves the thermal efficiency of the plant considerably. The technology is called bed mixing dryer. The pilot plant of the bed mixing dryer was built to IVO`s Kuusamo peat and wood fired power plant that was commissioned in the beginning of 1994. The Kuusamo district heating power plant has a fuel input of 27 MW that gives a power output of 6 MWe and district heat output of 17.5/21.2 MWth. As fuels are used peat, saw dust and wood wastes. The boiler is a bubbling fluidized bed boiler and the steam cycle is a conventional back pressure steam process. The unique feature in the plant is the new dryer that increases the overall thermal efficiency of the plant 10 to 15 units of percentage. In this project the operation and behaviour of the bed mixing dryer has been examined. Various components of the dryer were developed by the cold model tests carried out at IVO`s laboratory in Helsinki. Testing with the Kuusamo bed mixing dryer consisted of about 390 hours of drying tests with peat, bark and saw dust. The dryer operated well, and the drying was effective. The measured final moisture content varied from 7 to 19 % depending on the fuel particle size and the temperature level of the dryer}
place = {Finland}
year = {1995}
month = {Dec}
}