Official Proceedings Volume 26

Official Proceedings Volume 26

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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. 1915 edition. Excerpt: ...the mechanical apparatus if you will look them over. While the mechanical apparatus es very important and deserves a lot of study it is not so important as the combustion in the furnace itself. In producing that combustion you start with dry coal of a certain degree of fineness, after which the gases must pass through the furnace at a certain velocity. You must regulate the air supply in the combustion chambers in such a manner that you can get the most effective use of the heat in the furnace proper, as well as throughout the boiler. In order to accomplish the best results it is my opinion that you are dependent upon a certain amount of nduction in steam generation. In a cement mill you have a rotary furnace which is from 6 to 12 feet diameter and from 5O to 250 feet long, and you blow the coal in at one end under high pressure and it is not so necessary to have the diffused combustion results in order to get the calcining action. Furthermore, it really does not make any difference whether there is any soot, slag or unconsumed powdered coal produced because it all goes into the finished product and is ground up and sold. Furthermore, there is no brick work in a cement furnace. Now, in a locomotive boiler we have only about sixteen feet instead of one hundred feet in which to complete combustion and we dare not produce the concentrated heat effect If we did that we would destroy the life of the firebox and its brick work. I think you will see the necessity of inducing the heat through the boiler flues instead of blowing it through as the combustion flame way and the products of combustion should always be drawn towards an opening to avoid impingement. The PRESIDENT--If there is no one else who desires to ask any questions, we will be glad...show more

Product details

  • Paperback | 188 pages
  • 189 x 246 x 10mm | 345g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236873904
  • 9781236873903