. Factory and industrial management. Co., Chicago, 111. for the purpose of steam raising; the last column gives the per cent,of additional weight of the various grades that must be burned toequal in fuel value the best anthracite and bituminous coals. Kind of Coal. Per cent. Value. To add. Bituminous coal, good quality 100 Bituminous slack, 9° H-i Anthracite, steamboat, good quality 95 5-3 broken 97 3- egg 100 stove 100 chestnut lOO pea well cleaned 95 mixed with bone slate 90 buckwheat, No. i, good quality 93 7-5 2, 85 3. .• ? 83 culm, mixed with 20 per cent, soft slack, go
. Factory and industrial management. Co., Chicago, 111. for the purpose of steam raising; the last column gives the per cent,of additional weight of the various grades that must be burned toequal in fuel value the best anthracite and bituminous coals. Kind of Coal. Per cent. Value. To add. Bituminous coal, good quality 100 Bituminous slack, 9° H-i Anthracite, steamboat, good quality 95 5-3 broken 97 3- egg 100 stove 100 chestnut lOO pea well cleaned 95 mixed with bone slate 90 buckwheat, No. i, good quality 93 7-5 2, 85 3. .• ? 83 culm, mixed with 20 per cent, soft slack, good quality 83 No. 2 77 I alone, good quality 75 33-3 2 • 70 720 THE ENGINEERING MAGAZINE. Diminished production of smoke is a necessary result of uniformfiring, and so far as this condition is complied with the mechanicalstoker may be regarded as a means toward the abatement of thesmoke nuisance. At the same time it must be understood that smokeproduction is a result of imperfect combustion, and that mechanical. AN INSTALLATION IN TilL j;wlLEK PLANT OF THE SUPERIOR SHIP-BUILDING CO., WEST SUPERIOR, WIS., BURNING RUN-OF-MINE COAL. Duluth Stoker Co., Duluth, Minn. stokers are not smokeless when hard pushed. In this connection itmay be noted that the evaporative power of a boiler is not materiallyinfluenced by the admission of surplus air, as will be shown by thefollowing table: Absolute Steam Evaporative Power in a Perfect Boiler as from and at 212 Pressure, tbs. sq. inch. Air I. Air 1%. Air 2. 147 15-67 15-24 30 15-56 50 15-48 75 15-4 100 15-34 ISO 15-26 200 15-19 14-28 250 15-13
Size: 1705px × 1466px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
