. The Street railway journal . then empties above thedam, and it eventually re-enters the intake tunnel againand in this manner it is used an indefinite number of times,the creek forming a large cooling basin for the dischargewater. In connection with the intake and discharge tun-nels, it is to be noted that both of them form an integralpart of the power house foundations and are provided withpockets for the collection of sediment and foreign particles. gravity into chutes terminating over the narrow-gage rail-way in the ash tunnel above referred to. Each battery of boilers is supplied with an
. The Street railway journal . then empties above thedam, and it eventually re-enters the intake tunnel againand in this manner it is used an indefinite number of times,the creek forming a large cooling basin for the dischargewater. In connection with the intake and discharge tun-nels, it is to be noted that both of them form an integralpart of the power house foundations and are provided withpockets for the collection of sediment and foreign particles. gravity into chutes terminating over the narrow-gage rail-way in the ash tunnel above referred to. Each battery of boilers is supplied with an independentEpping-Carpenter 12-in. and 7 x 12-in. feed pump, and isfed by duplicate feed-water pipes, so arranged that eitherpump can be used to feed either or both batteries of system of water supply is the only one which is dupli-cated in the power plant, but it has been found advisable todo so in this instance in order to insure a constant supply ofwater to the boilers in case of accident to one set of supply. SCHEMATIC DIAGRAM OF CONNECTIONS OF SYSTEM Each of these pockets has a manhole rendering it acces-sible for cleaning. BOILERS The boiler plant at present consists of four 350-hp Bab-cock & Wilcox water-tufte boilers set in batteries of twoboilers each. Provision, however, has been made for anadditional battery of boilers to take care of the future ex-tensions of the turbine plant. They are designed for aworking pressure of 160 lbs. per sq. in., and each boiler hasa total heating surface of 3500 sq. ft. The boilers are of thedouble-deck type and have 4-in. tubes. They are providedwith a superheater capable of superheating the steam125 degs. F. when working under normal pressure. Atpresent firing is done by hand, but provision has been madeso that stokers can be installed if it is decided to do so at alater date. The contents of the ash pits are deposited by _pipes. Each feed line is equipped with a Worthingtonwater meter. The boiler gases are conveyed to t
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
