. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. ffect; and when it leaves thelast effect in its finally concentrated form, it is delivered to astorage tank, from which it is fed to the disk evaporators or to therotary incinerators. The water condensed from steam in the first effect is con-ducted to the boiler supply or diffuser hot-water tank; from thesecond effect, directly or through the vacuum pump, to thedrain; from third and fourth effects, also to the drain. The firstcondensate is pure water; the others are contaminated by liquidsand gases derived
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. ffect; and when it leaves thelast effect in its finally concentrated form, it is delivered to astorage tank, from which it is fed to the disk evaporators or to therotary incinerators. The water condensed from steam in the first effect is con-ducted to the boiler supply or diffuser hot-water tank; from thesecond effect, directly or through the vacuum pump, to thedrain; from third and fourth effects, also to the drain. The firstcondensate is pure water; the others are contaminated by liquidsand gases derived from the wood. At the bottom and side of each effect is a manhole T, to affordaccess to the tube sheet E, for cleaning and replacing tubes. 74 MANUFACTURE OF SULPHATE PULP §6 However, the rapid circulation of liquor makes cleaning hardlynecessary, beyond an occasional boiling out with water, exceptunder conditions which permit a hard scale to form (see Art. 94).92. In Fig. 22, is shown a partial vertical section and partialelevation of an evaporator having horizontal tubes. In this. TX ccccc _ _ occcccccccccccccccccc. ooooooooooooocoooc ccccccccccccc : roceecocceccc:occcccccccccccccc OQOOOQOOOOQQOQOC c DOOOOOOOOOC oooooccccccccc^: ^Condensation Puller Concentrated Liquor to next effectELEVATION. Fig. 22. ^ D ele\:: -: - PLATE-: apparatus, the steam is inside and the liquor is outside the courses of the vapors and the liquor are essentially the sameas for the vertical type shown in Figs. 20 and 21, and the lettersare the same for corresponding parts in all three figures. 93. Above the liquor side, Fig. 20, of the first effect, is a vaporspace C that is directly connected to the steam space of the second §6 THE EVAPORATORS 75 effect; and if the connections between the two parts are suffi-ciently large, practically the same conditions as to temperatureand pressure will prevail in both places. Hence, the condensa-tion of the vapors in the steam chamber of the se
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
