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Uploaded on:
13/02/2009 05:50:04
Digital Asset
File Size:
218.74 KB
1000 x 682 pixels
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P number: P000189
Old photograph number: OSLPlate6
Caption: Scottish oil-shale processing 4. Treating plant for crude distillate.
Description: Washers are vertical cylindrical steel tanks with a conical bottom and about 27 feet in diameter and 11.5 feet high with 4.4 inches brick for insulation. They have a 6 inch inlet pipe, a 12 inch outlet pipe and a 3 inch outlet pipe at the very bottom for removal of tar. The soda washer below is only 10 feet 3 inches high. The two sets of washers were capable of dealing with 74,000 gallons of oil daily. After washing the oil underwent a second distillation. The distillate undergoes chemical treatment to remove impurities. The oil is first stirred either mechanically or by compressed air in a 'washer' firstly with added sulphuric acid and then in a second washer beneath the first with added caustic soda. Both remove different impurities.
Date taken: 01/01/1927
Photographer: Unknown
Copyright statement: NERC
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
Orientation: Landscape
Size: 218.74 KB; 1000 x 682 pixels; 85 x 58 mm (print at 300 DPI); 265 x 180 mm (screen at 96 DPI);
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