Method for reducing comminution energy of a biomass fuel

Furnaces – Process – Burning pulverized fuel

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

110222, 110224, 110232, F23D 100

Patent

active

045893578

ABSTRACT:
The present invention relates to the preparation and burning of biomass-derived fuels such as wood waste or peat. Wood waste or "hog fuel" from the forest industries is of particular interest. Normally the entire stream of this material must be finely ground if it is to be successfully burned in an air suspension burner without any fossil fuel support. It has now been discovered that a bimodally sized fuel can be used. Only about 10-20% of the total heat energy is provided from a portion ground to a size less than about 100 .mu.m. This serves as an ignition component for a principal fuel which may be of much larger size. The usual hog fuel pile contains both bark and wood. Of these two materials, bark is much more friable and easily ground to fine particle size than wood. A major reduction in grinding energy is achieved by selecting the more friable material to be ground to fine size as the ignition fuel. The more resistant material is used as the principal fuel. When using a bimodal system, best results are obtained when the amount of ignition fuel sent to the burner is maintained constant. Load swings are accommodated by varying only the principal fuel component.

REFERENCES:
patent: 3229651 (1966-01-01), Wasp
patent: 3831535 (1974-08-01), Baardson
patent: 4229183 (1980-10-01), Eneroth et al.
patent: 4235174 (1980-11-01), Spurrell
patent: 4249470 (1981-02-01), Vatsky
patent: 4333405 (1982-06-01), Michelfelder et al.
patent: 4423689 (1984-01-01), Merz et al.
patent: 4426938 (1984-01-01), Leikert et al.
patent: 4436038 (1984-03-01), Leikert et al.
patent: 4532873 (1985-08-01), Rivers et al.
Fagerlund, Bertil, "How Some Scandinavian Mills Get Higher Fuel Value From Bark", TAPPI, vol. 63, No. 3, pp. 35-36, (1980).
Schwieger, Bob, "Power From Wood", Power, 124(2): S1-S 32 (1980).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for reducing comminution energy of a biomass fuel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for reducing comminution energy of a biomass fuel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing comminution energy of a biomass fuel will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2103037

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.