A Study on the Ignition Temperature and Ignition Induction Time According to Storage Amount of Wood Pellets

Abstract In the production, transport, storage and use of wood pellets forming a flammable and explosive dust. To assess the fire risk of wood pellets was determined ignition temperature of dust layers and dust clouds. We used two commercially produced pellets from wood waste and wood and studied the dependence of ignition temperature on the thickness of dust layer and also observed the ignition temperature dependence of dust clouds from the weight and pressure of air in combustion chamber.

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Hazards of Explosibility Dust from Wood Pellets

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1001.324 ◽

2014 ◽

Vol 1001 ◽

pp. 324-329

Author(s):

Jozef Horváth ◽

Karol Balog ◽

Domenico Scarafilo

Keyword(s):

Ignition Temperature ◽

Dust Cloud ◽

Dust Particles ◽

Wood Pellets ◽

Experimental Part ◽

Dangerous Situation ◽

Fire And Explosion ◽

Fire And Explosion Hazards ◽

Minimum Ignition Temperature

The main purpose of this publication is to determine minimal ignition temperature of dust cloud. The flammable and explosive dust is formed during the production, transport, storage and usage of the wood pallets. The examined samples in experimental part of the work were made from different kind of pallets. Contribution deals with analysis of fire and explosion hazards of dust particles generated during transportation and handling of wood pellets. Minimum ignition temperature of dust cloud were performed according to STN EN 50281-2-1. In terms of forensic approach, by using of selected methods, the conditions in which initiation and explosion of dust can be occurred were simulated the exposibility for wood pellets dust was tested under different condition using various pressures and various weight to samples. Defining the conditions in which the risk of formation of dangerous situation exists, helps to predict the fire and explosion in the premises where the pellets are used.

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Evaluation of A TGA Method to Predict the Ignition Temperature and Spontaneous Combustion Propensity of Coals of Different Rank

International Conference on Advances in Science, Engineering, Technology and Natural Resources (ICASETNR-16) Nov. 24-25, 2016 Parys (South Africa) ◽

10.15242/iae.iae1116404 ◽

2016 ◽

Keyword(s):

Ignition Temperature ◽

Spontaneous Combustion

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Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixture

Chemical and Process Engineering ◽

10.2478/v10176-012-0020-3 ◽

2012 ◽

Vol 33 (2) ◽

pp. 231-242 ◽

Cited By ~ 4

Author(s):

Marek Juszczak ◽

Katarzyna Lossy

Keyword(s):

Carbon Monoxide ◽

Pollutant Emission ◽

Heat Output ◽

Wood Pellets ◽

Wood Pellet ◽

Carbon Monoxide Concentration ◽

Heat Efficiency ◽

Air Stream ◽

Fuel Mixtures ◽

Lower Carbon

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixtureTests for combustion of hay and sunflower husk pellets mixed with wood pellets were performed in a horizontal-feed as well as under-feed (retort) wood pellet furnace installed in boilers with a nominal heat output of 15 and 20 kW, located in a heat station. During the combustion a slagging phenomenon was observed in the furnaces. In order to lower the temperature in the furnace, fuel feeding rate was reduced with unaltered air stream rate. The higher the proportion of wood pellets in the mixture the lower carbon monoxide concentration. The following results of carbon monoxide concentration (in mg/m3presented for 10% O2content in flue gas) for different furnaces and fuel mixtures (proportion in wt%) were obtained: horizontal-feed furnace supplied with hay/wood: 0/100 - 326; 30/70 - 157; 50/50 - 301; 100/0 - 3300; horizontal-feed furnace supplied with sunflower husk/wood: 50/50 - 1062; 67/33 - 1721; 100/0 - 3775; under-feed (retort) furnace supplied with hay/wood: 0/100 - 90; 15/85 - 157; 30/70 - 135; 50/50 - 5179; under-feed furnace supplied with sunflower husk/wood: 67/33 - 2498; 100/0 - 3128. Boiler heat output and heat efficiency was low: 7 to 13 kW and about 55%, respectively, for the boiler with horizontal-feed furnace and 9 to 14 kW and 64%, respectively, for the boiler with under-feed furnace.

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