Chemistry of pulp and paper making . Fig. 22. Sulphur Burner installing rakes which travel slowly back and forth, breaking upthe scum and presenting fresh surfaces for combustion. Withthis device the flat burners give excellent results. Modern sulphur burners are of two quite dissimilar forms —one a horizontal rotary furnace and the other vertical and sta-tionary. In the rotary burner, illustrated in Fig. 22, the sulphurenters from the hopper at the front end and gradually workstoward the back. As the burner revolves the sulphur is carriedup the sides and thus presents a large and cont
Chemistry of pulp and paper making . Fig. 22. Sulphur Burner installing rakes which travel slowly back and forth, breaking upthe scum and presenting fresh surfaces for combustion. Withthis device the flat burners give excellent results. Modern sulphur burners are of two quite dissimilar forms —one a horizontal rotary furnace and the other vertical and sta-tionary. In the rotary burner, illustrated in Fig. 22, the sulphurenters from the hopper at the front end and gradually workstoward the back. As the burner revolves the sulphur is carriedup the sides and thus presents a large and continually renewedsurface for combustion. A highly successful modification of thesulphur feed is to introduce it in the molten condition through apipe entering at the axis of the burner. A continuous supply of PREPARATION OF SULPHUR DIOXIDE 163 molten sulphur may be obtained by placing the crude sulphurin a steam jacketed tank and also surrounding the delivery pipewith a steam jacket so that the sulphur will not soUdify before it. Fig. 23. Vesuvius Sulphur BurnerCourtesy of Valley Iron Works Company reaches the burner. Users of this type of burner claim that it isthe best if it is fitted with self-feeding device and a large com-bustion chamber because it makes stronger and more uniformgas and starts and stops very quickly in case of shutdowns. 164 THE SULPHITE PROCESS
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1920
