Journal . r in immediate vicinity to theflame, and tire-brick shields in front of the first tubes,if the boiler is of a Calloway type. The grate alsowants covering with either a dense bed of ashes orlire tiles, and the lower half of the flue below thegrate should be closed with a metal shield. I aminclined to think that it would be preferable, if theuse of oil were intended to be permanent, to employa fire-box of firebrick outside the boiler, with a fur-nace of the type to be described hereafter, and leadthe flame into the boiler flues. The attention of gas engineers has been forciblydirected
Journal . r in immediate vicinity to theflame, and tire-brick shields in front of the first tubes,if the boiler is of a Calloway type. The grate alsowants covering with either a dense bed of ashes orlire tiles, and the lower half of the flue below thegrate should be closed with a metal shield. I aminclined to think that it would be preferable, if theuse of oil were intended to be permanent, to employa fire-box of firebrick outside the boiler, with a fur-nace of the type to be described hereafter, and leadthe flame into the boiler flues. The attention of gas engineers has been forciblydirected to the use of tar as a fuel for the firing ofretorts, now that this once high-priced material issuffering like everything else, perhaps even to a moremarked extent, from what is called depression in track,it has in many places reached so low a commercialvalue that it is profitable to burn it as a , at Nottingham this is not the case, and ourinterest in tar as a fuel is more experimental in view. A GUARD TILE. B TAR TILE. C Cleaning tils O FRAME E. FIRE BARS neighbourhood of Nottingham ; but as I have noinformation about the boilers employed, a close com-parison is not possible. Creosote is an excellentfuel for boiler firing, and easy to manipulate. Itrequires to be warmed if it contains much tarsalts, to dissolve the naphthalene, etc. Tar is rathermore difficult to manage with ordinary forms ofinjectors, as the peculiar orifices employed areextremely liable to obstruction with this viscousfluid, and there is a tendency to produce smoke ifthe flow of tar is irregular. For the purpose of injecting these liquid fuels intofurnaces, a great number of injectors have beeninvented, and if they materially differed in prin-ciple the study of them would be perfectly bewil-dering, but as they are almost all alike their studyis really very simple. The one on the talle beforeyou is perhaps the simplest form, and is one 1designed, and have called a spray burner, andconsists of one
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
