Transactions of the Institution of Civil Engineers of Ireland Volume 32-33

Transactions of the Institution of Civil Engineers of Ireland Volume 32-33

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...there are many forms, but they all come under one of three heads, t'.e.:1. Injectors working under a head of oil, or by compression on the oil (viz., a pump). 2. Injectors for spraying oil by means of, or in conjunction with, compressed air. 3. Injectors for spraying oil by means of steam. In the first case, working under a head or by pressure, the pressure serves to eject the oil, which on ejection is broken up by auxiliary means. The pressure required to eject.crude oils is very considerable, and varies from 30 to 60 lbs. per square inch or more, and is generally applied by pumping air into the tanks above the surface of the oil. The devices.for breaking up the jet into spray are many. In some is thrown, or directed, upon baflle plates, and in others thrown with circular motion all round the furnace bed. In.these forms, owing to the viscidity of the crude oils, it is necessary to heat the oils to a temperature of from 250 to i300 Fahr. to enable it to flow easily and send it in in a con.dition to ensure a fair combustion. But this heating has to-be done prior to spraying (generally with steam coils), and as all the crude oils are a compound of many oils, some of a very low flash point, these vaporising before the others, and being exceedingly inflammable, are a source of explosive danger if they get mixed with air; and the system is also wasteful, as..a large percentage of the oil is not burned to the best advantage. The second method, wherein the oil is sprayed by means of compressed air and pulverised before it enters the furnace, .is an advance upon No. 1, by reason of the fact that It carries the air for its combustion along with it, and at first sight should appear to be an excellent, if not perfect, form of burning...
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Product details

  • Paperback | 134 pages
  • 189 x 246 x 7mm | 254g
  • United States
  • English
  • black & white illustrations
  • 1236800761
  • 9781236800763