Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...tubes. There is a handhole in each of the front bends or connecting boxes b. The muddrum d stands vertically, and is located in front of the boiler and below the lowest tubes. The top of the mud-drum is connected to the bottom of the steam drum by a vertical pipe e. From the side of the mud-drum, a rectangular feedpipe / extends across the front of the boiler, joining each vertical tier of water tubes a. The mud-drum has a handhole on the side near the bottom, and the blow-off is attached at the center of the lower head. The boiler is enclosed in a steel casing. The fire-box is arranged below the tubes and runs their full length; the grate bars g slope downwards toward the rear. The products of cornbustion pass upwards between the tubes, thence about a superheater, and out near the top of the casing, as indicated by the arrows. Baffle plates / of steel or tile are fitted in the nest of tubes to deflect the hot gases, in order that the entire surface of the tubes may receive the benefit of the heat. The feedwater enters at one end of the steam drum and flows into a shallow pan h, then downwards through the external circulating pipe e to the mud-drum, and into the rectangular feedpipe /; thence it continues through the steam coils to the steam drum. The outlets of the water tubes in the steam drum are several inches above the bottom of the drum, so that the steam will not mingle with the comparatively cool water in the drum. The water passes into the mud-drum through a non-return valve, and then to the bottom and up around a vertical baffle plate. The bottom of the drum forms a settling chamber, into which much of the sediment is deposited. The non-return valve keeps the water circulating in the same direction through the water tubes when the ship, is rolling...
