Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 678
rage of heat shall be utilized to itsbest extent. 331. Cleaning the Heating-surface Outside.—The metalof the heating-surface in most boilers becomes coated with ascale of some non-conducting character caused by the lightdust and ashes attaching themselves to the plate, and particu-larly when tarry… … Fig. 496. at any rate rendering them less efficient. The cleansing ofthese exterior surfaces from the soft scale is done eitherwith scrapers, or by brushes (Fig. 496), or by means of a 620 MECHANICAL ENGINEERING OF POWER PLANTS jet of high-pressure steam or air directed upon the surface tobe…
Mechanical engineering · Steam power plants
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