Document evB3Xj1QweN5BmL0R5nOOpwXe

C/inOtr No. | c"OUP > C* I ll Ir I M a Clflndtr m.t ~ f a I,I 1*1 * I I I ~l CUhaal., Wf.X _ --- -- - i f 1 ii ii ri i r -J y~tihoun cft0UP2_________ I I1 f*I a~T*J Cffin4r M0.3 rMT8 T4 8 CytMb-MJB______________________ a J*1 ll~e e l *1 |T1 * empty mo fa B* Coding that. It-tOO pii the above chart on the b**U of 9 hr. per cylinder charge. Here we sea that as No. 1 cylinder completes the 100-Ib cooking operation it Is exhausted into No. 2 cylinder, 2 exhausts into 3; but 3 exhausts into 1, and the cycle repeats on group l. Note that the chart shows the six cylinders divided into two group* with group 2 delayed 1% hr after group I. This difference is to avoid the heavy steam flow required In warning the content* of the cylinder after the ex haust has been shut off. With the data HIP has supplied, my calculations indicate that his 200-hp boiler is sot operating at rated capacity. I suggest he look to that region for considerable improvement See Rock Product! of October 1944 for further information. John A Crohim, Pittsburgh, P excesa boiler capacity. At this point the valve may be opened, allowing steam to pats through the preasurereducing valve into the second pair cl cylinders, starting their 12-psl cooking before the first pair are through. This not only ss*es steam but by overlapping cycles, production is increased. Evidently //IT lias attempted to re cover some condensate, as he mentions using an injector. A boiler feedwater pump can he installed that draws water out of an open receiver. The. curing cylinders can be drained through steam Install Feedwater Neater % TllSIII ARE SEVERAL WAYS HV CEO steam. As it is exhausted (or oalj.40 min at the end of the curing eyel^ continuous operation of a (eedwstcT heater is. unwarranted. Condense* from the cylinders may be used for*1 heating purposes by piping it thrwgjft a counter-flow closed heater iniulMfl in the main condensate-discharge Uaa&a For a,steam-driven pump, t aggeit7 the method shown in above sketch. Iim entails a larger investment but p*yj5 for itself over a period oi time. Ron member that saving from tho installs-)? lion of a feedwater heater la the average^ plant is about JO to ]5<&. For every II# F added to temperature of the feed-^ water using exhaust steam, there results^ approximately 1% fuel saving. , As tho boiler has 2000 sq ft oi heal-)-; log surface we can assume its bp h*) Connect Cylinders Through Pressure-Reducing Valve about 200, evaporating between 60Wv and 6900 lb of ateam per hour at rated'] capacity. The storage heater would s Since HP's aottut has scarcely suf ficient capacity to cook two cylinders at once and each cycle requires 12 hr, each pair of cylinders is idle for several hours between cycles. Therefore it is not loo important that exhausting be done in 40 min.' Assuming this la true, have (o be largo enough (o handle 631 jj gal of water per hour. As the sketch'1 shows, provision Is mode to use the ^ steam that is exhausted at tho ead sf ^ the curing cycle. In this way, all avail-., able exhaust steam is used. J B Tb-' mao, Buffalo, N. Y. instead of exhausting to stmoaphere, ftp can exhaust through a pressurereducing valve into the next pair of cylinders to be cooked. When these cylinders are through with their 100-psl cooking they can be exhausted through the preasure-reducing valve, which is act at 12 psi. Into the third pair of cyl inders, and so on around. It is possible that before the 4-hr lOO-pti cooking is completed, the con crete blocks will be saturated with heat to the point where there will be some traps, as shown in above sketch, and their condensate allowed to flow Into this receiver. Additional makeup water can be pumped (com the river into this same receiver by a separate pump. R W Widget, Tulsa, Oklo. Rearrange Operating Time. ffJP CAff save steam from hia curiPI *; cylinders by rearrangement for proper coordination of his process on a con- ^ tinuous-flow basis. Fortunately sis hia cylinder* are Involved, making *** t^| rangement simple. During each 2-hoOJ ijr period a set function is being perform* ^ in each of the six cylinders. Letu4 ' . for the period between 12 noon ** _. 2 pm, cylinder 1 Is being filled, cylinder (Continued on page 146) Hi |ID*) FOWtR iRsenical admimitv ^!a4sH. uilt by The United States Hoffman Ma B chinery Corporation, Syracuse, New York, for use by dry denning plants in reclaiming cleaning solvent, this vacuum still contains AnacondaArsenical AdmiraltyCondenserTubes in its beat transfer elemenr. In this brass alloy, the inclusion of a small percentage of arsenic increases resistance to detinciftcation and pro motes longer life under corrosive conditions. Condenser tubes of Arsenical Admiralty alloy are noted for giving consistently satisfactory performance in almost every kind of service. For heat exchange Applications there are ten standard and several special Anaconda Tube Alloys--a range which makes it possible to sup ply Anaconda Tbbes for a wide variety of needs. Engineers and equipment manufacturers are invited to use the broad experience and metal lurgical knowledge of- our Technical Depart ment in determining the most suitable alloys Ah^^hoA for specific beat exchanger requirements. For c4mcwdx HEAT EXCHANGER TUBES general information on Anaconda Condenser and Heat Exchanger Tubes and TUbe Sheets, - * send for Publication 0-2. w** THE AMERICAN BRASS COMPANY General Offsets- Wambuty 88, Connecticut Subsidiary of AMooda Copp*r Mining Company ImCaoadat AnacoMTm AmiCan B*au Ltd. Kw.IWimi*, 0t. -OWE, May 1948 r ii; :i. rv 1. . 1->I