Document o98Bo0QOnzNddBp90XD1nJYp7

!<j grounded fa 1943 and 1946. k repair* were made locally. E f these accidents, most turbine rrere due to condenser dean- , 5000- and 10,000-kw units are jg&jed with totally enclosed generJ^^jcoolers, sad some outages have io broken tubes in the air Hgjji i,, iplte of these difficulties, Bi&Kifid 10,000-kw turbines have an ivsilebiiity factor of 93.7 and during their nine and seven fejS* sperstion, respectively. "^rbiaoblsde fouling has never been Jreblem. This may be a tribute to Sr feedwater treatment, which we fol- |ij*^|cli|jouft]y, and to the efficient op[jps&o of drum internals fa boilers fey? and 3. The 10,000-kw turbine' is fijJewd once every two years for In- |jwiyqipn Bkfbe operating staff consists of one nvtpaeer, oae fireman, one oiler and BOIUR FANS: Forecd- and induced-droit fans ore on the Wler-ptont floor. F-d fon discharges through tho otr preheater end the -d fan to the stock joeooal operator per shift who, fa ad- wfidis to their other duties, maintain an aecvsie leg of hourly meter readiogs. Rfbese, together with meter charts, are H(trpt ea file in the plant offices lor JO*I -- . r ... ..t. 1' einss /romeaadttur PLANT CROSS SECTIONS 80,000-lb-per-hr 250-pst 600-F boiler hot air heoter (or 375-F combustion oir. Primary air, 'jO*i ttchon te nndmtw t**t taetkn fo Ho J cwmWuv 'f! token from pniheated-olf duct. Is heated in tubular heater tea 600-F. At this temperature it goes to the cool-pulveriting Heady reference. ffipPewer-plant construction began on fjesmry 15,1937, when the temperature ^n 30 F below tero. The first turbine started March 23, the second during RtHjfirft week in April, and the third loeity in this pets. We find 4-bour eoot mine. Therefore, investment (or auto blowing necessary. When burning some matic combustion control, CO* record coals, the first-pas* tubes require hand ers and similar equipment *** not war lancing also. On the pulverited-coal- ranted. Since then, rising coal prices fired boilers, adjusting the secondary' have altered the picture and the time air dampen in the burners lo reduce is at band when installation of some of flame length also reduces slagging on this equipment can be justified. the alag>acrcen tubes. This operation Is quito restricted. As mentioned, -from 1937 to 1940 Slock Dump. In 1944, faced with cos) scarcity end high prices, a huge dump of discarded slack, some of it power was purchased from the utility over 30 years old, was purchased at an serving the district. But since tbe plant abandoned mine 10' miles from the expansion in 1940, the utility, pressed plant InslsHing a Bradford breaker by wartime demands, has frequently and suitable conveyors to load rail ears purchased power from the Granby Co. makes it possible lo reclaim this waste Ao interesting fact is that power pur dump by bulldozer, at the rate of about chased from the utility, 14,000,000 20,000 tons t year. Because of snow kwhr, is almost equal to power sold to . conditions, reclamation can be carried it. Therefore, Granby steam plant and out only in summer. Coal not immedi tbe utility hydro plant are of mutual benefit ately burned is stockpiled in the yard adjacent to the power planL Some 'Even though we are doing a pretty analyte moisture 7.66%; ash' 56.20%; good Job with what we have, the eflv Blu 6600 as received and 7150 dry. We . ciency of Granby plant cannot compare have displayed a lot of ingenuity St with that of a modem utility steam Cranby, getting steam out of coal that, plant The second-hand turbines limit according to the experts, could not be steam conditions to 250 psi, super burned. heated to 600 F. Moreover, when the plant was first built cheap coal was readily available si the company's own Since evaporation per lb of coal means little without the calorific value of the fuel, coal-testing apparatus was added to the mine concentrator susy office st Ailenby in 1942. Since then the firemen have taken hourly sample! from the coal feeders, which sre sub-' sequently made up into composite daily samples for the assay office. Prosimtts analysis is made daily and reports re turned to the plant. Operation during 1942 ie( s record for the plant, beeaaie it was the first year we had a complete coal-analyiis record; we burned 84,110 tons of$j 8303-Btu coal, generated. 70,690,280 kwbr at on over-ail heat rate of 19,761Blu per kwhr. Next year tbe heat rate dropped to 18,217-Btu per kwbr, which is the lowest in the plant's history. From 1943 to 1945, plant output wa* below normal because of wartime labor shortage at the mine, resulting is re* duced ore output. Power-plant output, in 1946 dropped lit 28,200,000 kwhr because of a lengthy hardrock-mfaen strike, but in 1947 il returned to nortnil with 70,000,000-kwhr generation. Turbines. We have had the uwal difficulties operating our turbines. Dur ing Its first year's service No. 3 had to be rcbladed. No. 1, 3 and 4 have been rebalanced at diAerenl limes. The SsW |/2f 1, 1937. They took full load on ^AofMi 14, seven months after construe- ijfea'iiarted. AC R Yulll of Vancouver ^'consulting engineer on plant coo- r IreWl jfcroction and J Southfa was-the first rj^dntendent. The writer fi indebted jke management of the Granby CooWidsbd Mining, Smelting A Power Co .miHe A C R Yuill for much of the history of the construction, operalflCT fcalarea lho plant TURBINE ROOM, Urges, uni, In the 17.500-kw plan,, o 10.000-kw turWn.,/ Is In foreground with elecldc Crone o, upper censer ond boiler cool bunkers o> right BOILER miUBIUTY. STUK PRODUCED, IONS OF COAL BORNEO, AND EVAPORATION Tin-Teas Potted, 1937 lo 19d ,____ fu. I Miltn <S,0M lb Pr i CSota-frti-lt*!w PtrW Sf--m CmE I bUUy, prWacarf, rnerf, ft /MO IS tons i.a sa.a 91.0 111,ass iis.no sot.441 ta.TM is. sec S3,ISO 4.04 4.30 4.14 .------ N*. 3 Mhn M.OOO lb Mr hr--* Pu/taWs4-Mf Rrcd 4m(F }ltm CmI S*mp, bUity, M* (6 ft 1900 lb foev cwl 33.9 91.4 94.0 143,831 179.917 413.BTJ 9,144 7.00 43.484 '4.00 39,419 3.30 87.a 91.J 99.7 113.084 17.014 19,841 14.100 3,411 1,390 4.40 3.07 4.09 47.0 13.3 89.1 179,114 310,*13 319.114 14.103 34.470 19,090 3.33 S.ll 3.31 47.3 100.0 140.0 190.0 3.340 8.903 I.33B 1,019 703 1.190 439 SIS 3.47 3 73 1.63 1.94 94.3 97.3 99.3 47.3 114.097 304.130 79.443 111,118 11.393 11.744 7,171 10,319 3.33 3.90 S.49 3.33 91.9 443,917 99,333 4.39 19.9 3.17S.434- 194,083 NflUi In 1943, oatat* of No. I batter m i due to replacement </ tbe mod drum. *--N. 3 bolt**t 39,099 Ik Mr * fujHpUtW-RMJ |p3 3Mftf. .Stmmm Cml " St biutfi ModtKod, bamd, m- -lb ft 1000 lb 37.0 94.7 97.0 7B.190 403,947 373.911 97.3 44.1 94.4 93.1 309.911 S3S.I04 473.319 308.111 7.9 3,780.933 7,300 34,110 S3.370 47,440 34.741 33,933 14,439 144,344 1.13 3.SI 3.43 3.37 3.91 4.04 s.ss 3.43 .71 1278) POWER M.r lW,-l8H8aV't May IMS f279| 79