Document ymr2earyOz4RXzJ7k2LbD2BpX

More PLANT PROBLEMS. n-jrry > -YOUR NEW PROBLEMS__- 1 What's Best Way to Remove Ammonfa? We hovo 2000 1b of ammonia (q our refrigerating system, which serves a large eold-atorag* plant Because we hove a large number of employes In the basements we need same quick way of dltposlog of this ammonia in an emergency. We have adequate water sup. ply from on outside source as well os u 50,000-gal, basement storage tank. What method, if any, could we use to mix this ammonia with water In the slot* age lank, or mix It ond then die. charge It to waslef We'd like to be able to gel rid of the ammonia In about 10 minutes. Can Power readers suggest some rapid mixing method, per mitting safe disposal of our am monia T--TS Burn'Foundation Holes tar,you can pierce rock, concrete, stone, granite, asbestos j^'other refractory with eleoiric are and welding machine 4400 amp, up. Flame oi 5 to 8 In. Is over 8000 F. Double jib electrode end holder make grounding unnecessary, fjertlng speed: 1 to 3 in. per min; ii depends on material. (0tstTi totocth Welding Alleys Corp Set the welding moehtne of ony conventional design to 400 omp or over. This depends on the matertol to bo pierced FOR OOOO RESUIT5, both brick and steel stacks must be eorefully designed, built NEW BREECHINGS were recently intilled in onr twin, I SO*ft stock*. Dur ing construction we decided out of curiosity to check stack size. Of course, there wasn't too moch we could do if calculations showed size was wrong, but we went ahead anyway. Here are some things we learned.' Many stack types and sizes may do the job. Cost ond economy may be the deciding factor in the long run. Stack type, its height and diameter ere im portant factors in cost end capacity. Stack must be high enough to prevent oot and smoke from becoming objec tionable to the neighborhood. Edward Delnick Brooklyn, JV. Y. STACK IS OK for roted output of 20,000 Ih per hr, but may be o trifle under sized for greaier outputs. John B Thuman Buffalo, H. Y. E J Anderson Cleveland, Okie Max Snotnrrr Huntington, IT. Va. Editor's note: Some reodtrs disagree with Reader Mott and the other con tributor!. Here are their commentt. Size IS WRONG. It should be: height 155 ft, dismeter 40 in. E Molina Cordero Buenot Airet, Argentina HEIOHT is too great. With a 50-in.diameter stack on this job, its height need be only about 120 ft above the boiler-room floor. This will give enough draft to run at full load with a wideopen control damper. F M Brunn IF. Englewood, H. J. MINIMUM DIAMETER should be 3914 in. with a height of 250 ft to meet draft requirements on this job. Draft with stack proportions proposed by CK Is only 0.90 inn while calculated draft is 1.25 in., according to my figures. P J Caroer Forest Hilts, H. Y. 2 What Causei These Burn Spats on Bars? The commutator on e 25-hp 6pola 70-rpm de shunt-wound elevator motor has six equally distributed bum spots corre sponding to the brush spacing. Each bum eovers an area of four commutator bars, and begins to appear a few days after resorfeeing the commutator. We hove had this trouble since we replaced a few coils several years ago. Believing the cause might be in the eoils, I checked them repeatedly without finding ny troubto. When elevntor ascends oe sparks oeeur, but slight spsrktng appears when U descends. Thera Is somewhot more sparking dur ing starting and stopping. We hove several other ma* ehines In service and though they spark there are no burned areas on their commutators. What causes this trouble? Mow can we cure It?--K/V Don't mlts next month problem*. Another chance to ute your ingenuity (Pill you help readers who tent as terns? Extra pay {or photos or row* 139 PUNT OPERATION AND MAINTENANCE SECTION \ f btert rod In speciol holder. Rod A Place end of rod on concrete to be J With the current on, Is 18 to 20 In. long -- may be longer V pierced lor bolls, turn on current through the concrete to | Move rod in ond out of hole while burning. For hole larger |ban rod diameter, use o slow, spiral downward motion Place the anchors in holes, move machine, ond screw down bolls Into the anchors. This job was dona in few minutes '*33 fUNT OPERATION ANO MAINTENANCE SECTION