. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Fig. 14. the grate bars from below. Theportion below the bars is calledthe ash pit. The flame and hotgasses, when formed, first strikeon the bottom of the boiler, andare then carried forward by thedraft, to the so-calljd bridge wall0, which is a projecting piece ofbrick work which contracts thearea of the flue n and forces all. Fig. 15, Maxims and Instructions^ 5^- THE GROWTH OF THE STEAM BOHLEE. the products of combustion to keep close to the bottom of theboiler. Thence the
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Fig. 14. the grate bars from below. Theportion below the bars is calledthe ash pit. The flame and hotgasses, when formed, first strikeon the bottom of the boiler, andare then carried forward by thedraft, to the so-calljd bridge wall0, which is a projecting piece ofbrick work which contracts thearea of the flue n and forces all. Fig. 15, Maxims and Instructions^ 5^- THE GROWTH OF THE STEAM BOHLEE. the products of combustion to keep close to the bottom of theboiler. Thence the gasses pass along the flue n, and return part oneside of the cylinder in the flue m (fig. 15) and back again bythe other side flue m to the far end of the boiler, whence theyescape up the chimney. This latter is provided with a dooror damper p, which can be closed or opened at will, so asto regulate the draught. This boiler has been in use for nearly one hundred years, buthas two great defects. The first is that the area of heatingsurface, that is the parts of the boiler in contact with theflames, is too small in jiroportion to the bulk of the boiler ; thesecond is, that if the water contains solid matter in solution,as nearly all the water does to a greater or less extent, thismatter becomes deposited on the bottom of the boiler justwhere the greatest evaporation takes place. The deposit,being a non-conductor, prevents the heat of the f
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
