Document BQ6nj3KJa11jj0QEakng9R7k

PROBLEMS FROM THE PLANT m,K r; ' '-txercisa.your. engineering wlt< by submitting ortiwtrs to this question, fresh from the plant. Suitable materiel will be paid lor; ontwers attomponled by sketches or photographs command additional pay I -1 low S-A bulk material handling systems i Jlili cut easts, solve problems in many fields | Hot* Can We Insulate and Waterproof Concrete Tank? We plan building a hot-water tank to store water lor our laundry. The tank, to be constructed o( reinforced con crete, will be located underground. We intend to insulate nod waterproof it. A pump will be installed to pump water from the tank into a hot-water line that feeds the various laundry units. Pressure in this line is 50 psi. The pump will be required to lift a 10-ft alalia bead. Normal water tem perature varies between 160 and 190 P. Can PowM readers suggest methods of waterproofing and insulating the tank? What type pump is best suited for this application?--<4IP fHOtytCHr tine, SOpsi garths Sufpfr wo/e/yj . Water tonh t80-(90F ^Asmtoresd concrete 'I N gentle handling Is assured for the grain procf essed in this plant. The weather-tight R60f.BR all s uniform load at the railroad track, elevates to the floor, end discharges to various bins ... In single, tomSarryor unit... without contamination, spillage or dust, erfat an information on S-A conveyor systems for food 2||s f|jyg 5orting Conveyors with end sections hinged, "HI*VllC to lower clean coal Into cert, with mini mum breakage at this Indians preparation plant- The S-A psa conveyors shown, permit removal of slate and foreign materials. Another conveyor beneath disposes of the refuse. Write for Information on S-A conveying end screening equipment for handling coal, ore, and stone at lowest cost. Readers' Answers How Can I Save Steam From Curing Cylinders? To cure concrete blocks tee use six cylinders, each 65 ft long and 6 ft in diameter. The blocks are stacked in the cylinders, which are then filled with five steam. The curing cycle consists of cooking for 2 hr at 12 psi, then gradually bringing pressure up to 100 psi and cooking for 4 hr. Steam is then exhausted to atmosphere in about 40 min. Only turn cylinders are cooking at one time; the ethers are being filled or emptied. Each operation takes about hr. Steam is generated in an hrt boiler haring 2000 tq ft of heating surface. We draw raw water from the Detroit River for feedwater. At timet toe do not use the feedwater pump because we cannot keep tteam op with cold water going into the boiler. We tried using an Injector bar it wastes a lot of tune. At present toe are using about 4^% tons 'of I2fi00 Btu coat in 24 hr. Coal .is fired by an underfeed stoker. Can Power readers suggest some way of using the exhaust steam so ft toil! not be a total toss? I thought of using it to heat feedwater but don't know how to make use of it in the short exhaust period of 40 min out of each 12 hr. Maybe some engineer knows of a sim ilar setup that has a good method for using waste steam--// W, chief engi neer. Preheat Cylinders With Exhaust Steam I assume HW`s curing cylinders are trapped. II not, they should bo, eo os to return coodensato to o receiver or open beetcr. t suggest his cylinders be piped la such o manner that when two cylinders era coming off the line the stesm be exhausted over to the two cylinders go ing on the line. Cylinders will then be partly heated before starting. Feedwater Is probably treated, so every pound of steam returned os con densate is a saving, both In (eedwster treatment and labor. William T Mul let*, Philadelphia, Pa. Regulate Exhaust Time And Feedwater Flow It sums os though HW could reduce coal consumption and improve boiler operation with a well-insulated feed- water storage tank, h should biyj sufficient colls in the bottom to condet steam end pick up a greater part o heat before dumping condensate. mention dumping os It Is unlikely t" condensate would be fit for boiler ( purposes because sand and cement picked up during the curing perk when steam is in contact with < blocks. Just before blowing down steam f curing tanks, water In feed tank wool be st a low love). When steam is f leased, raw water should be fed t and continued for duration of bbwdowi period. Tank site is determined by amount of steam released during b! down period, having sufficient water tel condense steam and transfer best- 3a E Fontaine, Buffalo, N. Y. ifilftT dust has been eliminated from many bolter rooms with compsct, dust-tight ?AER conveyor units like this. One conveyor draws coal HU. ||jmg reliable operation and low maintenance for many years was guaranteed for this S-A belt conveyor by the use of "Pacific" carrier*. Timken tapered roller bearings take the punishment of heavy loads of Reschedule Curing Periods I succor that HIP schedule pl*cl .j operations so, on completion of 3>e F natigt, derates, and fills several stoker hoppers. In other * dosetLcircuU REDLERS store tod reclaim from any pert I* Kongo bunkers, Write for suggestions on a compact, lolal conveyor system for your power plant. itone and gravel. Pressure lubrioulon end labyrinth seals pro tect from dlft and weather. Write for data on S-A belt conveyors for dependable, Urge volume, low cost handling. __ 100-lb cooking period, the steam i* **V| housted into another cylinder- Tfce second cylinder has been filled, closed i sad is standing ready for the vorfl-up J |ITE P HEN d-A DAMSONand 12-)b cooking operation. TbU rt`-| quires that he shorten the exhaust j gt^goiwar Avenue. AUoA. iiuhoii v Mr0t / tot anoius, cans. amevutt, ont. by using larger pipes and votves. *"#;j proposed plant operation is show* 88J 114 (308) POWER * Msy ----- -' rsi:,-n>;\n, rn^\CTrv)j.j,0K?'i3 BG?Q[pffilO).g?g "