Lumber, its manufacture and distribution . 166 THE SAWMILL POWER PLANT. Fig. By permission Gordon Hollow Blast Grate Co. 121.—A Form of Forced Draft Equipmentadapted to burning Sawmill Refuse. air under forced draft to the fire through a special form of hollow grate, one type of which is shown in Fig. 121. The surface of the grate bars are fiat and have smallrectangular holes cut intheir surface throughwhich the air passes. Another type of forced-draft grate, known as thegriddle-bar grate, has sev-eral circular lids or tuyeres,7 inches in diameter, whichare seated on a shouldercut into the gra
Lumber, its manufacture and distribution . 166 THE SAWMILL POWER PLANT. Fig. By permission Gordon Hollow Blast Grate Co. 121.—A Form of Forced Draft Equipmentadapted to burning Sawmill Refuse. air under forced draft to the fire through a special form of hollow grate, one type of which is shown in Fig. 121. The surface of the grate bars are fiat and have smallrectangular holes cut intheir surface throughwhich the air passes. Another type of forced-draft grate, known as thegriddle-bar grate, has sev-eral circular lids or tuyeres,7 inches in diameter, whichare seated on a shouldercut into the grate barsurface. The tuyeres haveoutlets on their rimsthrough which the forceddraft passes. The griddlebars are alternated withsome form of grate bar which permits air to pass from the ash pit into the combustion chamber, and also permits ashes to drop through the grates. In addition to the equipment mentioned a mud drum is required under the boiler for collecting boiler sediment; a steam drum above the boiler for the collection of dry steam; a safety and a blow-off
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
