. Electric railway journal . 21 ft. long, with a capacity of 1,600,000lb. per hour has been added to do the work of the dis-placed economizers, there being now a good supply of 748 ELECTRIC RAILWAY JOURNAL [Vol. XLV, No. 16 steam from the turbine-driven auxiliaries. It con-tains 240 pans, each 4 ft. long, having a total area of3400 sq. ft. In this heater the surplus heat is beingabsorbed to such an extent that an occasional gentlepuff of steam from the relief valve on the heater indi-cates how little heat is wasted in this part of thesystem. As the remodeled boiler plant provides only super-he
. Electric railway journal . 21 ft. long, with a capacity of 1,600,000lb. per hour has been added to do the work of the dis-placed economizers, there being now a good supply of 748 ELECTRIC RAILWAY JOURNAL [Vol. XLV, No. 16 steam from the turbine-driven auxiliaries. It con-tains 240 pans, each 4 ft. long, having a total area of3400 sq. ft. In this heater the surplus heat is beingabsorbed to such an extent that an occasional gentlepuff of steam from the relief valve on the heater indi-cates how little heat is wasted in this part of thesystem. As the remodeled boiler plant provides only super-heated steam, provision had to be made for the auxil-iary supply of saturated steam for the reciprocatingengines. In the line connecting the old and new boilerplants is connected a receiver from one of the oldengines. This is placed in a vertical position and thesuperheated steam is led in at the top, passing down-ward nearly to the bottom through a 15-in. tube. Nearthe top water is sprayed into the steam through a Boiler N?5. m INTERBOROUGH POWER PLANT—FIG. 10—PIPING FOR ONE UNIT spraying nozzle, the surplus collecting in the bottomfrom whence it is returned to the water system. Thewet steam rises in the space between the tube and thecasing, drying as it rises, and saturated steam is takenoff near the top. This device is known as an attemper-ator. In the boiler-room basement much space has beensaved by the removal of four triplex pumps, accommo-dating three turbine-driven centrifugal pumps sufficientin capacity for the entire plant, and the stoker fansand turbines. For each pair of boilers there is oneturbine driving two stoker fans direct and the stokersalso through helical reduction gears from the blowershafts. In the ashpit section of the basement, ashpitsof expanded metal plastered with cement have been re-cently put in. The electrical distribution of the plant has been en-tirely remodeled with a view to providing adequatelylarge switches, feeders, etc., and to protectin
Size: 1310px × 1908px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
