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Investigation of straw handling and feeding equipment; Undersoegelse af halmhaandterings- og indfoedningsudstyr

Technical Report:

Abstract

A study of commercially available pretreatment and feeding equipment for straw fuel was performed. It was found that biomass dividing devices comprise a great fire risk. Fast revolving cutters consume 100-500 kJ pr. kg biomass, and are sensitive to moisture. The energy consumption of slow revolving cutters is between 20 and 60 kJ pr kg of biomass suited for screw transport. Balebreakers use less energy, but are sensitive to moisture, and foreign bodies, especially rotating ones (energy consumption = 10-30 kJ per kg biomass). Reciprocating balebreakers have a tendency to pull out slices of the bale and so stopping flow. Screw conveyers are cheaper and can be made airtight and robust. Energy consumption is higher. For densification of biomass, pill and briquette presses can be used, but it can be expensive and energy requirements are very high. The crankshaft rampress is very sensitive to varying conditions in the biomass. Screwfeeders are designed to feed into combustion chambers with a pressure very close to atmospheric pressure. Pistonfeeders for small boilers are made to feed only small bales. (AB) (28 refs.)
Authors:
Publication Date:
Oct 01, 1993
Product Type:
Technical Report
Report Number:
NEI-DK-1388
Reference Number:
SCA: 092000; 320603; PA: DK-93:002096; EDB-94:017598; NTS-94:008357; ERA-19:006407; SN: 94001129688
Resource Relation:
Other Information: DN: Cover title: Undersoegelse af halmhaandterings- og indfoednings udstyr; PBD: Oct 1993
Subject:
09 BIOMASS FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; FUEL FEEDING SYSTEMS; STRAW; ENERGY CONSUMPTION; COMPARATIVE EVALUATIONS; DESIGN; EFFICIENCY; 092000; 320603; COMBUSTION; PUBLIC UTILITIES
OSTI ID:
10116682
Research Organizations:
Koch (T.) Energi, Vanloese (Denmark)
Country of Origin:
Denmark
Language:
Danish
Other Identifying Numbers:
Other: ON: DE94730336; CNN: Contract ENS-51161-93.0004; TRN: DK9302096
Availability:
OSTI; NTIS
Submitting Site:
DK
Size:
72 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Koch, T. Investigation of straw handling and feeding equipment; Undersoegelse af halmhaandterings- og indfoedningsudstyr. Denmark: N. p., 1993. Web.
Koch, T. Investigation of straw handling and feeding equipment; Undersoegelse af halmhaandterings- og indfoedningsudstyr. Denmark.
Koch, T. 1993. "Investigation of straw handling and feeding equipment; Undersoegelse af halmhaandterings- og indfoedningsudstyr." Denmark.
@misc{etde_10116682,
title = {Investigation of straw handling and feeding equipment; Undersoegelse af halmhaandterings- og indfoedningsudstyr}
author = {Koch, T}
abstractNote = {A study of commercially available pretreatment and feeding equipment for straw fuel was performed. It was found that biomass dividing devices comprise a great fire risk. Fast revolving cutters consume 100-500 kJ pr. kg biomass, and are sensitive to moisture. The energy consumption of slow revolving cutters is between 20 and 60 kJ pr kg of biomass suited for screw transport. Balebreakers use less energy, but are sensitive to moisture, and foreign bodies, especially rotating ones (energy consumption = 10-30 kJ per kg biomass). Reciprocating balebreakers have a tendency to pull out slices of the bale and so stopping flow. Screw conveyers are cheaper and can be made airtight and robust. Energy consumption is higher. For densification of biomass, pill and briquette presses can be used, but it can be expensive and energy requirements are very high. The crankshaft rampress is very sensitive to varying conditions in the biomass. Screwfeeders are designed to feed into combustion chambers with a pressure very close to atmospheric pressure. Pistonfeeders for small boilers are made to feed only small bales. (AB) (28 refs.)}
place = {Denmark}
year = {1993}
month = {Oct}
}