Transactions of the American Society of Mechanical Engineers Volume 41

Transactions of the American Society of Mechanical Engineers Volume 41

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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. 1920 edition. Excerpt: ...for CO2, O2, CO, H2, CH" and unsaturated hydrocarbons. 35 Fig. 3 is a diagram of the three-pass boiler as originally designed. After the first few tests the baffles were extended, making smaller the gas passages between the ends of the bafiies and the water legs, as indicated in Fig. 8. Other changes were also made as the investigation indicated the need for them. The points at which gas samples were collected are indicated by the small circles designated by the capital letters A, A', B, C, D, E, F, G, H, and I. 36 During the first six tests a large amount of combustible gas passed out of the furnace and either burned at the base of the stack, causing high flue-gas temperature, or escaped unburned. It was apparent that not enough air was admitted over the fuel bed, Fro. 3 Drxcasm SHOWING Mmrron Ussn IN Tssrmo THREE-PASS TYPE or Bornaa. and that the air which did find its way into the furnace through the firing door was not sufficiently mixed with the combustible gases to cause them to burn completely in the furnace. 37 Some of the air admitted into the furnace through the firing door found its way out of the furnace through the opening at I, between the first baffle and the front water leg, as indicated by the arrow in Fig. 3. A large part of the air also passed around the end of the first bafile without mixing thoroughly with the combus tible gases rising from the fuel bed. As the gases and air passed through the boiler they formed a better mixture which tended to burn at the base of the stack. Evidently the combustion space was too small and the path of the gases and the air through the furnace too short for the two to form an intimate mixture. ADMISSION OF AIR OVER FUEL BED 38 It was apparent that more air had to more

Product details

  • Paperback | 426 pages
  • 189 x 246 x 22mm | 757g
  • United States
  • English
  • black & white illustrations
  • 1236886011
  • 9781236886019