Document NGJjodpVnzgY0Gza0Y9YgJ0rb

.'ationil 'UstionT iM- m-L Fig. 4--New bolter's meter panel on which are mounted'meters for recording steam flow and air flow; steam, combuatlon-alr, flue-gas and feedwater tem peratures; Indicating draft pressure at five points In furnace, boiler and economizer; and for recording feedwater level In boiler to guide operator J* other schedule con be selected on the control if desired, to suit operation. Duplex drives are provided on the stoker, s 4-speed squirrel-cage motor and i constant-speed induction motor with a tsriable-speed transmission. Each con nects to the stoker-drive shaft by a roller chain and sprockets. Normally the in duction motor through the variablespeed transmission drives the stoker be cause it gives better speed control. By using forced- and induced-draft fans on the boiler the plant's original stack has ample capacity for the in creased load. These fans are driven by constant-speed motors, stoker draft be ing controlled manually by dampers in the stoker and extension-grate windbox connections. Furnace pressure is regu lated by automatic control that positions the uptake damper between the induceddraft fan and breeching.' Outside of furnace-draft control, auto matic control was not provided becauhd normally the boiler will supply a base load of about 100,000 lb of steam per hour. However, in the boiler and its combustion equipment,'' provisions have been made for the installation of auto matic combustion control if this becomes desirable. About 60% of the boiler's feedwater is condensate return and 40% raw river water filtered through sand with no treat ment. Condensate and makeup mix in a 300,000-lb-per-hr deaerating feedwater heater, are heated to 212 F and pumped (Continued on page 138) ^..vsZ .. & '1946 PRINCIPAL STEAM AND ELECTRICAL EQUIPMENT Boiler-Plant Extension of E B Eddy Co Consulting Engineers: Hardy S Ferguson & Co BOILER AND AUXILIARIES: /Btfff ....................................................... Babcock*Wilcox ft Ooldie-McCulloch Boiler; 2-drum bent-tube Integral furnace* watorwalla made up of bare tubes, atud tubes and Bailey block!; 12,297 aq ft of heating eurfaee in boiler and waterwaJIs; economiaer; 5720 aq ft of water-heating eurfaee; nted iteamlog capacity 100,000 lb per hr, continuous; 460-pal design pressure, 175-pal operating preseure at superheater outlet; 5800 cu ft furnace volume; 25,000 Btu maximum heat release per cu ft per hr; superbaatat; drainable, 130-F superheat, S08-F total steam temperature Boiler refractories.................................... Babcock-Wlleox A Ooldie-McCulloch BsOer heat Insulation...................................................................Atlas Asbestos Co loot blowers..................................................................................Diamond Specialty Ash gates ................. ......................................... ..................... ..............Link-Belt Co BoQer etee) casing, ducts, branchings.. Babcock-Wlleox A Ooldl^McCulloch COMBUSTION EQUIPMENT: Stoker............................................................................. American Engineering Co Taylor, watereooled', underfeed, 17 ft, S% in. wide by 16 ft, 8 In. long; 10 retorts; 45 tuyeres; actual grate area, 518 aq ft; projected grate ares, 116 tq ft; combustion rate, 10,400 lb per hr Stoker multispeed-motor drive................................................ Lincoln Electric Co Totally inclosed, 5 hp, 440 v, 450 to 1200 rpm, squirrel cage Motor control, remote............................................................. Cutler-Hammer, Inc Stoker motor on varloble-epeed drive...............-....Canadian General Elec Co Totally Inclosed, 5 hp, 440 v, 1160 rpm, squirrel cage Motor-starter pushbutton...................................... Canadian Qcneral Electric Co Bxteaalon-grata hydraulic dump........................... Logansport Machine Works Bstenslon-grate dump control.....................................................Eagle Sign Corp Pump motor on grate dump............. .................. Canadian General Electric Co Totally inclosed, 5 hp, 440 v, 1160 rpm, squirrel cage Motor starter, remote pushbutton......................Canadian General Electric Co Safety switches on stoker motors.................................................... 8quate D Co pomace pressure regulator............................... .................................AW Cash Co Rorted-draft fan, vans control........................................................... Sheldons, Ltd Motor driven, 49,000 lb per hr at 5.25-in. wg and 100 P Forced-draft fan motor........................................ 1 Canadian General Electric Co Totally Inclosed, 100 hp, 1150 rpm, 440 v, squirrel cage Induced-draft fan.................................................... Sheldons, Ltd One, 200,000 Jb per hr, 7.4 wg at 425 P........... ...........-........................... Induced-draft fan motor.......................................Canadian Oeneral Electric Co Totally Inclosed, 125 hp, 1160 rpm, 440 v, squirrel cage Motor starters, pushbutton.................. Canadian General Electric Co Safety switches.......................................................................................Square D Co VALVES, PIPING AND TRAPS: Safety valves, Consolidated....................................Manning, Maxwell ft Moore Nonreturn valves............................................... Crane, Ltd Blowdown valves..................................................................... Edward Valves, Inc .Drain valves.......................... Crane, Ltd High-pressure valves.................................................................................... Crane Ltd Feedwater valves........................................................................Edward Valvea, Inc Piping insulation............................. ...................................Insulation Products Co Traps ...................................................................................................Trevlce Mfg Co PEEDWATER SYSTEM: Feedwater chemists........................................................... W H and L D Beta Co Feedwater acid pumps........................................................... Milton Roy Pump Co Acid-feeder control................................................ Canadian General Electric Co Feedwater beater (Cochrane)...................................... Canadian Allls-Chalmera Deaerating, 500,000 lb per hr, from 65 to 212 F Feedwater automatic controls (Copes)........................................ .Peacock Bros Excese-pressure regulator (Copes)..................... ...........................'.Peacock Bros Water columns..................................................... ...................... Diamond Specialty Feed pumps, 2.......................................... Babcock-WUcox ft Ooldie-McCulloch One, turbine driven, 225,000 lb per hr, 550 pal One, motor driven, 150,000 lb per hr, 100 ptl (standby) METERS; Boiler meter and control panel.....................................................Bailey Mater Co Boiler meter (steam-flow air-flow), steam temperature and pressure re corders, flue-gas temperature recorders, 5-polnt draft gage and feedwaterlevel recorder................................................................................ Bailey Meter Co Steam-pressure gage................................................ Manning, Maxwell ft Moore Hydraulic-pressure gage......................... ........................................U. 8. Gauge Co POWER May 1946 (289) 67