. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 12 BULLETIN 509, U. S. DEPARTMENT OF AGEICULTTJRE. conduct it back to the pump, the water being recirculated through the sprays. G is a pipe condenser for use toward the end of the drying operation. K is a baffle plate for diverting the heated air and at the same time shielding the under layer of boards from direct radiation of the steam pipes. The operation of the kiln is simple. The heated air rises above the pipes H H at the sides of the piles of lumber. As it comes in con- tact with the piles portions of it are coo
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 12 BULLETIN 509, U. S. DEPARTMENT OF AGEICULTTJRE. conduct it back to the pump, the water being recirculated through the sprays. G is a pipe condenser for use toward the end of the drying operation. K is a baffle plate for diverting the heated air and at the same time shielding the under layer of boards from direct radiation of the steam pipes. The operation of the kiln is simple. The heated air rises above the pipes H H at the sides of the piles of lumber. As it comes in con- tact with the piles portions of it are cooled and pass downward and inward through the layers of boards into the space between the con-. FiG. 2.—Diagrammatic section of improved dry kiln with spray cliambers on sides. Double- truck form. densers G G. Here the column of cooled air descends into the spray flue B, where its velocity is increased by the force of the water spray. It then passes out from the baffle plates to the heaters and repeats the cycle. Various modifications of this arrangement may be made. For instance, a single-track kiln lanj be used. This-form would be repre- sented by simply dividing the diagram vertically into two parts by extending the wall G (on the left side) upward to represent the outer wall, and the part to the left of this line. Or, again, the spray chambers may be kept on the sides as shown in figure 2. The lumber would then slope in the opposite direction with respect to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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