The layer-flame method of bark burning
- Polytechenergo ltd, St. Petersburg (Russian Federation)
At the present time many countries including Russia have at their disposal a considerable number of abled boiler installations designed for an utilization of different biomasses and wastes of the timber industry (such as peat, bark, sawdust, chips and so on). The traditional technology of burning with the application of layer or flame processes, especially in case of unstable heat-technical characteristics of a fuel to be used does not guarantee a reliable and economical performance of a boiler installation. For example, dampness of bark used in enterprises of the pulp and paper industry as an energetic fuel may vary from 50 till 70 per cent during a short period of time. Operation of the boiler installation is also complicated by variable composition of a fuel. Fuel particles may be either very small or very coarse, that is, they may differ from one another, according to their sizes, by thousand times. To flatten the heat-technical and fractional characteristics of a fuel there is used a difficult and cumbersome equipment the performance of which is complicated by the possibility that some of coarse metallic or mineral fractions can penetrate together with a fuel into the process. There is needed a search for new ways of updating the efficiency of energetic application of such fuels. Investigations of this problem are being carried out in a few directions including different variations of thermal treatment of the described material (pyrolysis, gasification and so on). A lot of works is connected with the exploration of boiler installations equipped with diverse modifications of the fluid bed furnaces. However, as a result of their having proven to be too expensive, difficult to create, unreliable and for they also take too much electricity on their own needs, these furnaces have not yet found wider spreading as for the burning of such hard-combustible fuels as bark and other highly damp wastes of timber industry.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- OSTI ID:
- 115273
- Report Number(s):
- NREL/CP-200-8098; CONF-9508104-; ON: DE95009230; TRN: 95:006736-0054
- Resource Relation:
- Conference: 2. meeting on biomass of the Americas, Portland, OR (United States), 21-24 Aug 1995; Other Information: PBD: [1995]; Related Information: Is Part Of Second biomass conference of the Americas: Energy, environment, agriculture, and industry. Proceedings; PB: 1741 p.
- Country of Publication:
- United States
- Language:
- English
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