Document 5LXM8LmqY1Oqb372pX6Rw4yz0

INTER-OFFICE CORRESPONDENCE Et h y l Ga s o l in e Co r p o r a t io n CHRYSLER BUILDING 405 Le x in g t o n Av e n u e Ne w Yo r k December 5, 1941 .AEHO TO jffi. H. W. KALEY Attached is a report which Ellis Locher prepared covering the work which he did in cooperation with the Schutte & Koerting Company on the operation of an eductor used for tank cleaning. Ellis advises that he still has two of these eductors at home, and he has Schutte & Koerting*s permission to keep these as long as we continue to make experiments with them.. JACsk Att. N22501 .01 TAM CLEANING SUCTOH The following is a brief description of certain equipment which appears could be used for the cleaning of small storage tanks-- that is to say, the typical type tanks found in bulk plants, either vertical or horizontal. These tanks usually have a maximum dimension of 10|- feet by 30 feet and capacities in the neighborhood of 20,000 gallons or less. The purpose of using this equipment is to enable a tank cleaning job to be done without the necessity of men entering tanks. EQUIPMENT Equipment consists primarily of a water actuated, specially designed, eductor. The one used for experimental purposes is manufactured by the Schutte-Koerting Special 2" Eductor (3rass) (Water Jet Cesspool Pump - Eig. 222). Water under pressure is introduced in the inlet side of the eductor. A hose connected to the suction side of the eductor is placed in the tank and the combined discharge would again go through a length of hose to a pit. OPERATING CHARACTERISTICS In practise a v/orking pressure at the inlet side of the eductor at 4o#/sq. in., and a maximum flow of 23 GPM has given satisfactory re sults. However, as this pressure increases up to a certain point the suction capacity increases at a much higher rate. For the purpose of this equipment the suction capacity may be defined as the quantity of material removed from the tank and for convenience measured in gallons per minute. 0022410 Curve Sheet I shows the relationship between Pressure Capacity, or the quantity of water entering the eductor, and Suction Capacity plotted against Working Pressure* These curves were plotted for water only, hut the manufacturer of the eductor uses as a rule of thumb to measure the solid material handling capacity of the eductor, 4 pounds of sand per gallon of water. Ho accurate tests have been made to measure the rate at which solids can be removed. Prom crude tests which I have run, it is apparent that there is little advantage in operating the eductor at pressures above 60 pounds per square inch, although if pressures in excess of this amount were available throttling is not necessary. Curve Sheet II shows the Suction in Inches of Mercury as well as the computed Suction Lift in Peet, plotted against operating pres sures at the eductor. This curve will indicate the height at which material can be lifted under various working pressures and it is significant to note that the equipment would be applicable to the usual type of underground horizontal storage tank. MISCELLANEOUS NOTES OH REQUIREMENTS POP OPERATION Water Pressure Prom a preliminary check, it is evident that most bulk plants have a municipal supply of water available, with a main in excess of 2" and an outlet no smaller than Pressure is usually in excess of 30#/sq. in. Pump A pump is recommended as part of the equipment, to be ulaced in the line between the water connection and the eductor, to boost pressure as required. Sven though a minimum pressure is available without.the pump, its use, by boosting pressure, will increase Suction Capacity and decrease Time required to do job. 0022411 Hose 2a hose has been selected in order to keep to a minimum the pressure drop due to friction losses* G-uage The manufacturer of the eductor will make a guage having a nozzle the duplicate of that in the Eductor. With a pressure guage attached, working pressure at any point can he determined in advance. EQjJIPMMT AITO APP5.0XIMA.TjIl COST 1 - Schutte-Xoerting Special 2" Eductor (Brass) ('Water Jet Cesspool Pump - Pig* 222). $ 69.00 1 - Motor Pump - Centrifugal Type - 25 - 65 Pt. Head 1 HP Explosion Proof Motor 100.00 200 Pt. 2" Smooth lined non-kinking hose, suitable for pressure or vacuum 170.00 Miscellaneous valves, fittings, gages, probe, nozzles, etc. Botind figure cost $450,00 100.00 $439.00 SUMMARY 1. Experience has shown that the fundamental principle described is applicable to tank cleaning. So far no tanks have been cleaned on this basis, primarily because the equipment necessary was not available at the time of an actual tank cleaning. In spite of this, material heavier than normal sludge, and of approximately the same consistency, has been successfully removed from an underground tank. 2. There is need for further experimental Work to refine equipment. 3. The probe and tools designed and developed by Jim Boudreau would be used to advantage on the suction side of the eductor. 4. There is need of an accurate survey of operating conditions at various representative bulk plants in order to determine the limitations 0022412 of the use of the equipment of this type. (A rough estimate indicates that more than 75$ of hulk plants have suitable conditions). I would recommend that a complete set of equipment he assembled for use and then made available to various oil companies for use under actual tank cleaning conditions. 5. It is significant to note that the Shell Oil Company has for a number of years been using a completely equipped truck for the clean ing of underground service station tanks and fuel oil tanks. She equipment they use is somewhat similar to that described in this re port. That is to say, the principle used for removing material is an eductor. In this connection they have offered their cooperation which insures the loan of one of their trucks for any experimental work which we may wish to do. 0022413 SCHUTTE & KOERTING COMPANY IV & WATER JET CESSPOOL PUMPS HE 6 Water Jet Evacuator or Cesspool The & Water Jet Evacuator has no moving TPump, Fig. 222, is used to handle liquids parts and little attention is required, as the containing solid matter. The arrangement of operation can be closely regulated by a single suction and discharge connections allows pas valve in the pressure water line. These jet sage of this solid matter through the pump. pumps are better suited for cesspool cleaning or similar service than pumps of other types. Water under pressure is used as the operating Where there is a large amount of solid matter medium and the entrainment action of the jet in the liquid to be handled, a mushroom of pressure water draws in the liquid to be strainer should be used on Evacuator suction pumped. line. CAPACITIES AND PRICES OF WATER JET CESSPOOL PUMPS, FIG. 222 Size P/2 2 3 4 Suction Capacity Gals. Per Hour 720 1,350 3,600 6,600 Connections, Inches Pressure Water Suction and Discharge 34 l i'/2 2. ... .M...... 2 3 4 List Price Brass Iron S52.00 69.00 104.00 173.00 S 16.00 58.00 81.00 104.00 Code Word Brass Iron Cyanic Cyclic Cycling Cyclist Cycloid Cyclometer Cydonal Cyclone Page 2230 2-M K* 0022414 WATER JET EDUCTORS R WATER JET SAND AND MUD EDUCTORS FIG. 224 SAND AND MUD EDUCTORS are recom mended for pumping out wells, pits, etc., where there is an accumulation of sand, mud, slime, or other material of a nature not easily handled bv the standard Water Jet Eductors. Mud Eductors are likewise well suited to handle the heavy sludges forming the residue from refining operations in oil plants or from other industrial processes. CAPACITIES, PRICES AND DIMENSIONS OF A WATER JET SAND AND MUD EDUCTORS, FIG. 224 Size Suction Capacity Gals. Per Hour Connections, Indies Pressure Water Discharge List Price Code Word Weight Lhs. Dimensions (Inches) AB U/2 2% 3 4 *5 *6 750 2,600 4,000 7,000 11,000 15,500 i 2 -V2 3 4 5 W2 S58.00 Cystic m 69.00 Cystose 3 95.00 Cytode 10 9% 35 16% 75 16% 4% 77b m 4 160.00 Cyv 120 251/a n 5 250.00 Cyvas 200 301/j 17% 6 360.00 Cyvor 300 39% 19% * Have flanged ends. A Sand and Mud Eductors are usually made in cast iron with bronze pressure nozzles. For handling pickling solutions and other corro- sive liquids, they can be made of Everdur or of other suitable metals, 2-M Page 2229 Ki 0022415 HE 0022416 Kt? 002241 v rv cr v rx