Document YDKOBxaq7qd5b5z65NDkLaVv8

R1 effc-alwbdW-Z.O-Sf'OOb' Power LAN ELECTRIC DRIVE UNITS OPERATE "weafher or no)- i? i'i CAREER OPPORTUNITIES AT UN Expansion program of thi* kins-cslnhlishcd firm ho* many features io miract nuisiiinriing fccem gmduulcx in engineering am) science. Oppor tunities arc in Miles field engineering, product and application engineering, research, advcr* tiling, market development. Widely-respected policies assure recognition of progress and achievement. Address Personnel Manager for/ interview at nearest of 17 LAN offices. JiMd NUvru.<ro(f> Exposed to ice, sleet or blazing sun, this L&N Electric Drive Unit pro vides indoor performance on outdoor appli cations. Because the drive unit is such n vital link in a combustion control system, the weather-free operation of Electric Drive Units is u real advantage for LAN Metermnx Combustion Control on outdoor-type plants. In addition, the L&N Electric Drive Unit provides many more benefits which make it equally valuable for indoor applications. For example: Indicates true position--small indicat ing meters on control board show actual drive unit movement, rather than a loading pressure which should produce a movement. Can't be backdrlven--self-locking double worm gear docs away with additional locking devices. Transfers instantly--from automatic to remote manual control; there is no inter mediate, reset or balancing position required. Uses auxiliary power--remote control is as reliable as station auxiliary power. The unit releases itself after a service interruption . . . operator docs not have to unlock or reset the various units. Works manually--gcared-down hand wheel makes manual operation easy. Write to Leeds & Northrop Company, 4910 Stenton Avenue, Philadelphia 44, Pa. LLUiil LEEDS |N NORTHRUP inInurnmtnu Automatic Contndt Purnac** JANUARY 1953 VOLUME 97 NUMBER 1 ENGINEERING AND MANAGEMENT W J Nool Station In North Dakota burns pulverized lignite Do plant air systems need a new look? How we investigated and cured condenser-tube corrosion Structural support for power-plant loads Danger! Boiler scale ot work Both waste-heat and new boilers supply bigger steel mills Unattended cold-storage plont runs smooth with remote signals Hew methods speed lorge coal stockpiling operations .Consider h-t woter for your next process or space-heating job Dota sheet: Maximum allowable working presture--6 71 75 78 80 84 87 90 94 96 99 PLANT OPERATION AND MAINTENANCE MAINTENANCE: Eleven' timely articles on repairs and upkeep Pad with neoprene to save critical parts from corrosion, wear , Programing: Surest way to better boiler-room maintenance .less steam maintenance now Smart setup chores fuel-tank sludge ' Repalr*sprung crankshaft In place and save $$$ Overhaul that pump at the right tlmo Planned bell maintenance for longer life Refrigoratlon maintenance: Key to better cold-job results . Checking on unit parts gives bost heat output Electrical maintenance: Coming through In a pinch How to ground portable electrical equipment Practical Ideas 124 Howto . Plant problems 130 Headwork Argument corner 136 Marmoduke Surfoceblow 103 106 108 109 110 112 114 116 118 120 122 138 140 142 READER SERVICE SECTION Defense digest ` ` Power news Technical briefs V.I: 146 Plont equipment news 148 New free bulletins 150 George Edwards 154 163 166 IIONITC Is a major fuel in the northern prairie Hale* but it usually haa been fired on grete*. Thus apeoia] interest attachee to the new William j Neel Station ol Central Power Electric Cooperative, where lignite la pulveritcr fired. Some 90 miles eotith* east of Minot, S. D., the plant is practically ei mine mouth, receiving fuel by a short haul over o private railroad. Cover photo show* another feature of , the station--use of Insulated steinleioeteel curtain wells. Severe climate made It seem wise to enclose all equipment except hightension iwitcbgear. Thua, denied the sav ing* possibilities of outdoor construction, the designer* turned le Ihl* economical and eesy-to-maintain enclosure to keep building costs to minimum. Nexf month ... * Plenty of new ideas have Ireen com ing along in greasea, fluid and solid lubricants. To get up lo date quickly, scan our February lube roundup. With reheat now uandard practice for large central stations, we're ready lo take s look ftl what may he the next step--double reheat. .Next month Shan non and Selby give you results of n study comparing double reheat with the familiar single-reheat oycle. * How well vertical pumps perform.de pend# to a large extent on inlet condi tions. Testa on model* prove an eco nomical way of apotting inlet layout defects and correcting them. Over at Charles Pfiter & Co, they're ( January 1953 POWER bursting with good ideas on electrical Vol 97--No. 1 mointenonce, as Associate Editor Jim :K : hhh s coftMtldiitd Stitrut and htdutttr. Tht Kntfmttt Pith*. Tht EmUttt, Tht O'Connor found out on a recent visit. In February he'll tell you how they de BXe'CUTIve. BDITOBIaL *M ADVERTISING OFFICES: J JO W 4Jmd Si. N-- York JS. N. V. sign and select equipment to keep ' `V Mtdrsw. jpjldtm: WllUrd CTitwIict. Eicvuiiw Vke-FiwMcnu lotah a OcmsOI, VlcvJ**# Treufi[ Jabn J Cooke. Seerturyi F*ul MonifOmtrr. Senior Vlct-rie*idrnl. KiWirailoM maintenance to a minimum, and then TTTM8*1 fttlnh B Smith. VJcc-PmlOtM eod Eaiiortal Dfrwion Ncton Bond. Vkc-Prcildcnt and Director of '`wjWoti i B DltckWm. VlM-Prctidcnt and Dlrcrtor of Clrailaiton. how they go about doing the needed .: *\c ,fV0SCKIPTlONS; Addrro cormpondMca lo Fowts. Sutocrtptfon Sarrfce. ITS W 4fnd Sr. New York work in the best way. i, .rjv1*1- v. Allow ona ftiomh for chain ot addren. Subscription ira toilettes onto (tom etcemiwa. cMineci* .. 7* *JF*rnn paraortnd cn**fvS in OcsJfft. optnUon and malnrcoanca of power. Ilftit. heal and other i.. - w In uttliclci. rmumwilnn amu. Induttrlal and service pianu. Fotliion and company connection . f. L` * -- and future. . .ndlealed on tubtcrlpilon order*. mplci: U. S. cm potaqjiaei, Ctnade SOfi *11 oUcr Si.SB. Subscription rit-U. 9. and U. S. monfhs ' S4.W lor enejretr, la.os lor Iwo yean. M.OO tor (Brce mn. Cbmtfs: tt.00 for one year, f lu'iS ITM lwo F**re. 1(2.00 for three year*. AR ocher countries; S: 100 tor one year. 121.00 lor two year*. r three yean. Entered U iccand-clm mailer January 20. 1*4* tl the poll office at New York. N, V. v^ADrf^.^ * March i, (ST*. Prinlcd (a U.S.A. Cen^pil ill) hy McOraw.Jlili Pubttenlni Company,' Inc. You'vo liked Sheppard T Powell's - i \T `JP** **ierved. 4, 'l*,C?w*a article* ate Indeacd In both the ImduitiM Ant Index and the Eejinerrhtp Jndra. Fowl* articles on basic water-treatment proc y* *n annual Indet. which ti available tor J0< from tba edltortal offices. esses, so you'll be glad to know that we have moro on the way. JANUARY 1933