Document Dv4yNYEr2zzy8rrMZbaVoXJoQ

CROSS SECTION shows new 3-drum rodiant boiler No. 3 with on eomo level at Induced, behind air hooter; *5,00Wwjg economlxer and regenerative olr hooter. Foraed-drolf fan it No. 2.hot condenser ocrass It* auto. Note vertical etw Locates n&ah Pokca City, center o( 'western Oklahoma's petroleum industry, Lincoln Beerbower Station was orig inally designed to burn petroleum coke from a local refinery, with coal and goe as supplementary fade. Later, gas be came available and petroleum coke was the stendby iueL In the initial in stallation, made in 1929, two 150,000lb-per-hr steam generators supplied a 15,000-kw turbine-generator. Provisions were made for handling and firing both solid and gaseous fuels, and the prob lems of burning fuels of such different characteristics were solved by suitable furnace design. With relatively low-cost fuels, and at the then-existing state of the art, most economical steam condi tions for the first unit worked out to be 400 psl and 698 P. Changed Conditions. Since then, im portance of petroleum coke as a foe! for this plant has declined. Costs of coal and gas have risen. Thus, when postwar extension of this plant was studied, higher pressure and tempera- lure wero indicated. When extension was authorized, economical balance be tween fuel and investment casta dic action condenses part of the stesa trolling quality of steam entetlolr superheater as a means of mtiatl" tated relatively modest pressure in crease, to 650 psl, and going to 900 F. The extension, which goes into opera tion some time this fall, consists of a desired temperature at the sup< outlet. Because water flow throuiB tube bundles may, under sontej tlons, represent a substantia] pern single 250,000-lb-per-hr steam generator of total feedwater flow, two reft and a 25,000-kw turbine-generator. The existing building was extended approxi mately 60 ft. Operated essentially as a unit installation, the new steam gener ator end turbine make use of watertreatment and fuel-handling facilities in stalled for the 6rst unit. The section elves'are installed: one in the tube bundles and one in nuin ' feed line just ahead of economic The fully wstereooled fumseeM hopper bottom, from which !*s sluiced by s hydraulic syiteuSj also serves tho soot hopper. The fjj above shows tho general arrangement of the new unit, while tbs plan on the feeing page indicates relation of new equipment to old. Steem Generator. No. 8 steam gen erator is o 5-drum radiant design, with pendant superheaters having condenser temperature control. Tube bundlee in volume of 17,000 eu ft yields s live heat release of 18,850 8to t>' per hr. Two ball-mill pulverlKgjj ply (our burners, which also fi^ Sj gas- Draft system consists forced- and induced-draft famll the boiler at the level of the jjji toI regenerative air heater. HJaT superheater Inlet header receive cooling - couplings provide volume ooo?S water from the boiler-feed discharge constant-speod-molor drives. A)? line, ahead of the economizer. Cooling combustion control is afr sctu*^| 40 ($93) POWER < ceives steam from the lowest bleed point --12.8 psla et full load. The middle bleed point--45 psis--supplies the de aerator. The three motor-driven boiler- feed pumps take suction from the de aerator hotwell and discharge through the high-preMure closed heater. The deaerator receives drains Iron both closed heaters; ejector drains go back to the condenser hotwell. Boiler steam, through pressure-reducing valve, holds deaerator at 2 psl minimum. In the simplified evaporator hookup, both drains and evaporation go to the deaerator. Steem supply comes from the top bleed point (1&4 pile), which also serves the high-pressure heater. Continuous blowdown is automatically controlled by a conductivity cell. Sam ple water Row goes through o cooling unit, which is thermostatically^-con trolled, and thence to theconductivlty cell, which actuates the blowdown valve. Concentration in the evaporator thus regulates rate of blowdown. Water Treatment, Makeup for. the evaporator comes from filters and softeners installed for. boilers 1 end 2. Wells and springs supply raw water. For internal treatment In boiler 3, a portable air-motor-driven mixer and dis solving tank discharge into a feed tank supplied with water from the main boiler-feed Una ahead of the regulating valve. Sufficient pressure differential is thus available to Inject' chemical feed into the boiler drum. A complete sam pling system Is provided for main pieam line, superheater inlet header, front and mud drums, condenser hotwell, boiler- feed-suction, lino and evaporator ynpor (I ' __I tieottr ^T^ \ A line. Degassers and conductivity colls ere Installed for main-steam, evaporator* ....... * ! L- vspor and boilcr-feed-euction samples; s pH cel) Is also provided for the boiler* - (____ t___J feed-suction samples. Cooling-water |I!huZ Now turbine has throe bleed points supplying low-pressure closed L ' eorQ*or ond high-pressure hooter. Note simplified hookup of evaporator valves are all thermostatically con trolled. latoka System. Circulating water for Control Room.The extension houses a Klin boiler control room for all three fttctm generators. Three dust-tight jpaeh panels carry indicators, recorders Epd controls (or each steam generator. EQathe panel for No. 3, tho upper verRfe*)-section mount* the various operRdng meters, tho top bench slope am- [?**. snd the main bench elope se- Jjpto* valves and switches. Relays and auxiliary devices are under the The full complement of oper- Ey?I Instruments includes a steam-tern- MkVt0fe ,eeorder and Indicator with V?|h*ttiBperature alarms and a boilerIw^lcvel recorder end controller pro* vided with high- and low-level alarms. Coal from Oklahoma fields, and the local petroleum coke, come to the plant by roil. Care discharge into a track hopptr. Coal is crushed and raised by skip hoist to'a tramway running over the sus pended steel bunkers (sea section). The tramway was extended for the new unit. Fosdtiooitnp Cyrlo. Turbine-generator No. 2 has three bleed points and the feedwater-heating cycle (see diagram) is relatively simple end straightforward. A vertical hotwell pump discharges con densate through an ejector condenser and generator hydrogen cooler to the low-pressure closed heater, which re the horizontal cross-flow 2-pst* con denser comes from the Arkansas River. The new unit has its owr, intake, a con crete basin having s trash rack. Stop logs precede end leilow the traveling screen. Monorail hoists, on steelwork above the building section bousing the circulator and screens, serve to Uft out equipment for servicing. Roof hatches give access. The vertical propeller-type circulat ing pump discharges into s 36-In. con* de&ser-inlel line. Located across the turbine axis, the condenser discharges into a 48-in. line, which is joined by e line from No. l condenser. Discharge Is downstream from the pleoL Octobsr 1918 I591) It