. American engineer and railroad journal . by means of the airblast. It is claimed that whatever be the pressure of the air-blast, the delivery of the coal ilust is perfectly regular, andthat no smoke whatever arises from its combustion. The finencss of the coal dust used depends on the kind of coal ; themaximum is that passed through a nun. mesh screen, thebest results being, however, obtained with dual passed througha mm. mesh screen. A certain degree of moisture mayalso be given to the air-blast, according to the kind of fuelused. One of the first installations of this coal dust bu
. American engineer and railroad journal . by means of the airblast. It is claimed that whatever be the pressure of the air-blast, the delivery of the coal ilust is perfectly regular, andthat no smoke whatever arises from its combustion. The finencss of the coal dust used depends on the kind of coal ; themaximum is that passed through a nun. mesh screen, thebest results being, however, obtained with dual passed througha mm. mesh screen. A certain degree of moisture mayalso be given to the air-blast, according to the kind of fuelused. One of the first installations of this coal dust burning ar-rangement was carried out in the early part of this year at theworks of Messrs. Arndt Bros., in Beriiu. This is a small-sizeapparatus, and has been working ever since, giving entire sat-isfaction. Since then two sets of a larger size have been fittedto a Cornish boiler, having two furnaces, at the glass worksof Messrs. Ebert A: Neumann, at near Berlin, andthese are still in successful operation. The hitter installation. THROTTLE VALVE. PENNSYLVANIA KAILliOAl). is shown in fig. 1 in our issue of the 12th inst. In the firstexample quoted, the boiler is of the Paucksch tubular typeworking up to Hi , at a pressure of in.) lbs. per squareinch. It supplies steam to a engine, 715 lbs. of coaldust being consumed on an average per 21 hours, equal toabout 4.!t5 lbs. of fuel per per hour, including tin; coalconsumed at the start for heating up the boiler. In the Bee-ond case, the boiler has a heating surface of 901 square metres,and works at a pressure of 90 lbs. per square inch. It suppliessteam to a engine. In this case ground English steamsmalls are used, the consumption per 24 hours amounting to5,610 lbs. The economy in fuel in the hitler case is shown bythe statement that the consumption of fuel—of a much belterquality than at present—before the arrangement was lilted up,was about 6,930 11k. It is uot only in connection with the firin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
