Document 4vMdwMY0Qyo4aZ6X4Vdw906yN

4oooti Tier Otemmtol TWO HEW STEAM GENERATORS ol 50,000-tb-pm-hr copodly odd Iho nested tlmm ol 0 prmiuro lovol Ihol pormln conomle ( HhA o*4mt&'urt-rttrvr faodmottr ftoetara '"'l L------------ A-iSTS"?----------------------- ~Cyn,m, IOA0 CHAHGCS mulling from seosonol vorioiicri* or* ttni Into tMj stcemflo* pottem by proper odfuitinent of fhs fig PULLMAN STANDARD CAR Better operoling economy plug additional steaming capacity results from a combined power pueily and alto additional electricgenerating capacity became highly important. To provide this needed ad ditional capacity and at the same timegive a better over-all operating econ per hr,a total beating surface of sq ft and a furnace volume of SOW cu ft. There Is no economizer bat 4050-sq-ft tubular air healer hu idS supplied. | Circulating system of these boilo* aj expansion and modernization program' carried out at this manufacturer's Chicago plant omy a plan for modernizing end ex panding power was put under way. Major steps in this modernization program involved: (1) installing two new 50,000-lb-per- eludes a radiant waierwall sectiea Is the furnace an^ a crois-boffled coaicc tion section, built around two ma drums. Upper or steam-release dnw has a 54-in. Inside diameter sad dj Tub 110th Street, Chicago plant ol hr steam generators,to deliver steam at 425 psi and 7S0 F. (2) removing one of the 1500-kw lower or mud drum has 42-b. diameter. A pendant superheater j 3500 sq ft robes steam temperiraraf the Pullman Standard Cor Manufacture ing Co had in 1945 the following major equipment In ft* power house; (1) two 175-pslg 450-F 60,000-lb-per- turbine-generators and installing in its place a 3000-kw turbine designed to take steam at 400 pal and 750 F with provision for extraction at 175 and 5 Stsom Distribution. Steam fw two new boilers enters a header si psig and 750 F< The quantity si ttt*j they deliver varies with the season! F hr steam generators (21 four 15-prig tetureted 20,000-lb- perhr steam generators (5) one 2000-kw turbine-generator operating with throttle conditions of psig (5) making certain necessary altera tions in the 2000-kw turbine (or opera tion with 400-psi 750-F steam (4) installing a new 300,000-lb-per- summer conditions steam load tl level averages about 9(1200 lb per fc and for winter with the plant head* load added. 120,000 lb per hr. Coming off this 400-psl header, .175 pels 460 F; 5-psJ extraction or induction; 27 in. vacuum (4) one mixed-pressure turbine-generator of 2500-kw capacity with throttle conditions of 175 psi. 450 F; 2,5-psi induction; exhausting to 27-in. vacuum (5) two ISOO-kw turbine-generators operating with throttle conditions of 175-psl 450-F exhausting to 27-In. Modernisation. This lineup of equip ment could no longer meet growing plant needs. Additional steaming ce- hr deaerating heater, new boiler-feed pumps and other ousiliery equipment (5) selling up the required switchgear and electric substations (6) fitting all old and new equip ment into a well-engineered and com pletely integrated plant so expected operating economies could be realised. Collar Unit*. The two new eieem gen erators, rated at 50,000 lb per hr, hove a heat release of 22,000 Btu per eu ft in flow dia&rom above, ora fl) denaing-turbine-generatort (2) feed pumps (31 a pressowrtdscn station. The 3000-kw machine base load. Its summer throttle 94,150 lb per hr, and of ibis. per hr are Med off at 175 psfo- j! Ing 19,060 lb per hr return j deaerating heater from the In winter, as in summer, both the/H and 2000-kw mochines ea/f J ?OWffl OctobwJ I OB (620) The 3000-kw unit takes 5300 lb Mr hr. ^ delivers 51,000 lb to the I5>pii bleed point and 2500 to the deheritor > condensate. The 2000-kw util receives 31,500 lb per br at the igfcttle; delivers 20,000 lb through the ISfil bleed point, returns 11,500 lb to deaerator as condensate. ' The boiler-feed pumps operating from the 400-psi level use 4050 lb per hr In summer and 4610 lb per hr in win ter. In both eases til steam exhausts t* ihs medium-pressure closed feedwster heater In the feed line to the new betters. Lsi major element off the 400-pal header, the preasure-reduclng station, handles oo steam under summer operate lag conditions, bat 50,390 lb per hr during the winter. latenwedlote Pressum. Next pressure level, the 175-psig 450-F header, has fcoDoectioni for steam from (1) two 60.000-lb-pcr-hr ousting steam genera tors (2) the preuur.reducing station from400-psi header (3) bleed from the 3000-kw turbine-generator. Summer and winter steam distribu tion differs. Summer load is such that ae steam eaters the 175-psl header from the 60,000-lb older boilers nor from the main pressure-reducing station be tween the 400- and 175-psi levels. All eatn tames from the 175-psi bleed point of the 3000-kw unit. Winter leading brings about a different bal ance. Tba 3000-kw high-pressure lurbias supplies no steam to ibis header at all The elder holler unite deliver rated capacity, 120,000 lb per hr, and add to the 30,390 lb coming through >be prouure-reducing station. .Us various elements depending upon l?5*pal header for steam, see flow "lagram above, are: (1) o 2500-kw turbine-generator (2) a .high-pressure closed feedwater heater (3) o pressurereducing vslve connecting to the 15-psI system (4) sir compressors tn the plant, shop special heating and process, forgohop'uses. In summer, 9230 lb per hr of the 74,290 lb coming off the bleed point of the high-pressure 5000-kw turbine go to the closed high-pressure feed water heater with exhaust passing on to the medium-pressure feedwater healer. Tbe 2500-kw turbine-generator takes 17,170 lb per hr of this supply to generate 2000 kw, Together with I5*psi steam entering st a later stage the 2S00-kw unit passes all steam through a condenser sad back to the deaerator. All the rest of the 175-psi team; 55,000 lb per hr,, goes to the forge shop and air compressors. Winter load produces the following rearrangement of steam flow at the.175psi level The 120,000 U> per hr de veloped by the older boilers supplying this header and the 30,390 lb from the reducing valve divide up this way: The high-pressure closed feedwater heater takes 12,410 lb per hr; 55,000 goes to the forge shop ond air compressors and the remainder passes through the reducing valve to meet the beating load. Low-Praiiura System. The only re maining operating steam system, is a 15-psl one. It has four 20,000-lb-per-hr boilers built to generate steam at this pressure. In addition, it connects with (1) the 175-psi steam through a pressure-reduelng valve (2) three turbines, the 3000, 2500 and 2000-kw units (3) extraction, forge shop uses ond air cotnpressora. Operating economy dictates (ha fol lowing balance. For summer, all steam entering the 15-pai system comes from the exhaust of air compressors and . forge-shop uses. This steam goes (1) to meet the process heating load, 11,000 lb per br, {D vo enter elthe laiet stage* (27,530 lb per hr) of the 2500-kw tur bine-generator, and (3) to raise the temperature in the deaerator, 10,970 lb per hr. Winter loading produces this distrib ution. The 15-pei boilers develop 76,710 lb per hr ol steam. To this Is added 62,980 lb per br from the protabra* reducing valve operating off the 175-paJ header and a total of 71,000 lb par-hr from the 3000-kw end 2000-kw turbinegenerators. Exhaust system from com pressors and forge shop sopply another 55,000 lb per hr. - The various users of steam from the 15-psi system handle available steam in this proportion: 32,930 lb per hr go to the deaerator to raise its tem perature; the plant heating load for winter needs amounts to 252,700 lb per hr. Condensate from this heating load joins with the 14,000 lb per hr com ing from the condensers ol the 3000-kw and 2000-kw turbine-generators when carrying full load. Tbe 2500-kw 175psl turbine-generator under normal win ter operation carries no toad. Water Cycle. All condensate returns, plus the exhaust from the medium-pres sure elosed feedwater heater, meat with the makeup at a 300,000-Ib-per-hr de aerator. Some steam from the 15-psi system goes to raise the deaerator tem perature. A series ol two different-site and pressure pumps deliver water from the deaerator to (1) the new 50,000-lbper-ht high-pressure boilers (2) tba two existing boilers supplying steam at 175 psi and (3) the lour boilers delivering 15-psi steam. PRINCIPAL NEW EQUIPMENT OF POWER PLANT Pullman Standard Car Manufacturing Co, Chicago, III. Tia GKNBHATORS AMD AUXILIARIES *vCv two, *5 p,|. 7jo p. l-erwn. Mvnw. MtimDi, 10,000 It br ................................................. !*P**4**r*. I, M St .................... Broi Briltf * Mff Co ** Setttto, *, m. par uli........... 5"* Uawata, tlr puff....................... '-** SkMeCncfa|i.................................................... ..Diamond Power Iptililtj Cv ................................W A Mtlchior ................. Unlttd Cenvayor Com * Uvtv-traia --..-........................................................................ ... Btobtr Co --.wM It ft S In,, J leader* **.4^a,.t7,Ug|..................................................... Lard* 4 Northrop Co ........................'.........................................Clangs Pn Co PWa,,#f **............................................. ..............Ctr|* Pte C* ^ ........................................................ Republic Plow Maura Co T*B4THSHr SYSTBU AMD AUXtUAtttKS: ^r*tot. ! ............................................................ Pa^ip'iod Maeby Com * <l a t, |j | * 11 in. dls a IS It S la. plus itenta'mtloa. ' * Oetobot I94g Pavdwotrr rafutaton................................................Northern Baolpowot Co Prtdmtcr b*air. I....................................................... Atborzvr Hvitar Co SIS to ft. I2S.S00 lb par br, aacb from >70 10 S70 P| ataam prMnm 40 d ttl pit, ivipocltvoty Boiler faad pump*. S........................................................ Ingarooll-Raad Co Tvrblnvdritea, -ato(* ccBtrlfogal pumpa, ISS |pm, isas.lt total bood BLBCfHlC OMMMHATOMS AMD AUXILlAPIMt/ Turblot-tiotfitor, eat. IS0O hw..................................Otntrtl Bloctrla Co SA pf, tractloa it ifS- and S-ptig, throult condltlonti 400 ptl, US P CondanMr, S-pau....................................................... Allio-Chalmm Mf| Co SMS *0 ft offactlva tcalios aorfoca gwltebstar. low olit|t......................................... Alllt-Chatman Mf| Co Per *la-MS.bva Indoor aubrtailoaa Unit aobttallont, S........................ ..........................Allla-Chilmvrt Mff Co tsatudoo main ISSS-amp. S6,S00.amp Inumtptini capacity air airroll braabart. ona par atatlon: 400-amp, SS,OOO.amp ` lotarnrpUoscapaehr f*dar braabart, S par atatlon CONSfl VMO BMOIMSBRS.................... Laramera A DosglatA Iao (621) <09