. Electric railway journal . ng them with plastic cement? Is there leakage because the iron doors on the boiler-setting have not been packed with abestos to make themair tight? Are the baffle walls tight so that gases areproperly deflected over the boiler surface instead ofescaping directly to the flue? Are you guessing at thedraft over the fuel bed or do you have a draft gage?Do you, also, have a draft gage at the flue damper?Is the fire level and free from holes ? Are the air spacesin the grates clogged? Do you periodically clean theboiler tubes of soot, clinkers and scale? Is the fuel bedke
. Electric railway journal . ng them with plastic cement? Is there leakage because the iron doors on the boiler-setting have not been packed with abestos to make themair tight? Are the baffle walls tight so that gases areproperly deflected over the boiler surface instead ofescaping directly to the flue? Are you guessing at thedraft over the fuel bed or do you have a draft gage?Do you, also, have a draft gage at the flue damper?Is the fire level and free from holes ? Are the air spacesin the grates clogged? Do you periodically clean theboiler tubes of soot, clinkers and scale? Is the fuel bedkept too thick or too thin for proper combustion? Doyou constantly see places where steam is visibly wasted?Have you ever consulted a combustion engineer? Haveyou ever lived in a house heated with coal stoves ineach room, and ventilated through the cracks in thewindows and doors, and is a similar system economy ina power plant? December 21, 1918 Electric Railway Journal 1087 The Control of Concejitaiated BoilerWater Is Ewflial. THE concentrated water in theboilers of steam power plantsvery often receives no con-sideration whatever, even thoughthe plant engineer may be duly con-cerned about the quality of feedwater with respect to scale forma-tion and corrosive properties. Thisis due to ignorance. Very often it is not known that invariably analy- sis of water samples taken fromthe feed lines and from the boiler drums will showdifferences not only of degree but total differences ofkind. It is the feed water, to be sure, which containsthe ingredients potentially capable of causing scaleformation or corrosive attack on the boiler steel, orboth. But the actual deposition of the scale, its physicalform if deposited and the evidence of the corrosion, ifcorrosion actually occurs, are due solely to the chemicalnature of the water in the drums and tubes. This istotally different from that of the feed water and is nota mere difference of concentration. Illustrations of the above are easily
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