Document MJOEKJZB4qOD5eXmNQpGKz5Rz

steam, just about enough exhaust steam to meet feed water heating re quirements. Any additional steam required for this purpose will route from the 30-11) steam system through a reducing valve, ft is contemplated that one of the existing smaller feedwater pmnps will carry the plant load during most of the summer season, or the two in parallel will carry the loads in the winter season. This will always leave one or more feed-pumps idle, ample time being provided for main tenance and stand-by capacity. The coal-handling system, con tinuous blowdown equipment, ash- fuel Itoilers. This was done in order to provide two methods of getting coal from the car to the main boiler coal bunkers, permitting maintenance on any of the coal-hoisting equip ment at any time and promoting continuity of operation. New Turbine The steam loading diagrams show ed the maximum required steam load ing upon which a new turbine size might be selected. Conditions of minimum hydrogeneration over the past ten years, minimum steam re quirements over the calendar year, maximum steam available from wood refuse (which reduces by-product power available from turbine ex traction), no steam flow to dryers of paper machines but full power requir ed to keep paper machines running, and peak electrical loads on system were considered. The important by product power, previously discussed, received utmost consideration. Final ly studies of electrical power require ments of the new paper machine and pulp requirements were superim posed upon the electrical loads of the existing system to determine the total electrical requirements. Under the most extreme condi tions it was considered that 6400 kw would be required for the expansion program. An .8 power factor 6000-kw turbine-generator was selected with extraction at 30-lb pressure. This size provides no expansion for future growth conditions; however, varia tions in river flow conditions should provide ample time for planned main tenance and overhaul periods so that the equipment can be kept in best condition for low-water periods. Load studies further indicated that handling equipment, combustion control, feedwater regulation, venti lation, coal scales, and feedwater treatment were, in general, extensions of existing systems. The installation of the equipment and clearing of the site involved the removal of two stokerfired boilers, their coal bunkers, re moval of their induced-draft fans, duct work, and relocation of an ex isting bucket elevator in front of the stoker-fired boilers. The latter boilers were then equip ped with a small coal silo, anti the ex isting bucket elevator adapted for use with this silo. Further adaptation was made to transfer coal from the old bucket elevator to the new bunkers supplying the two large puwdered- POWERFAX. SPRING WSJ PAGE.