. The Effect of two flame retardants on particulate and residue production. Fireproofing agents; Prescribed burning; Forest management. Burning Procedures The cribs were burned on a table placed on a weighing system similar to that described by George and Blakely6 (fig. 2). Two methods were used to control temperature buildup around the load cells. A layer of Zonolite in- sulation 3 inches ( cm.) deep was placed between the fuel and the weighing system. This material was found to be thermally stable up to 1,500°C. (2,700°F.); it is not hygroscopic. Streams of compressed air were continuousl
. The Effect of two flame retardants on particulate and residue production. Fireproofing agents; Prescribed burning; Forest management. Burning Procedures The cribs were burned on a table placed on a weighing system similar to that described by George and Blakely6 (fig. 2). Two methods were used to control temperature buildup around the load cells. A layer of Zonolite in- sulation 3 inches ( cm.) deep was placed between the fuel and the weighing system. This material was found to be thermally stable up to 1,500°C. (2,700°F.); it is not hygroscopic. Streams of compressed air were continuously directed around the load cells during the tests as a further safeguard against temperature changes that could cause elec- tronic drift. The procedure for burning began by condi- tioning the combustion chamber to a temper- ature of 90° F. (° C.) and a relative hu- midity of 20 percent. A slight positive pres- sure was maintained to insure removal of all of the effluent through the stack. The in- duced convection had no measurable effect on the burning characteristics of the fires. The test cribs, including the 4 by 4's, were placed on the weighing system and ignited at time zero using 100 ml. of a 50:50 mixture of ethanol and acetone contained in two trays. During the following 60 minutes, weight loss and radiant flux from the flame zone were continuously recorded and flame heights were photographed at 1-minute intervals. A Gier and Dunkle directional radiometer with a 15°-view angle placed 20 feet ( m.) from the fire was used to measure radiant flux. After the fire went out, the residues from the 4 by 4's and the cribs were collected and the dry weight Figure 2. — A schematic representation of the combustion facilities. (Note: not drawn to scale.) Particulate Sampling The particulate sampling system consisted of a Neucleonic Corporation of America Model HAS 69 high volume sampler and Gel- men type A glass filter paper. The sampler was connected to a
Size: 1490px × 1676px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, booksubjectforestmanagement
