. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. der, while the coolingwater is running in the oppositedirection, cooling the outside ofthe pipes. With good circula-tion of the water, a fairly goodcooling is obtained; but it isobvious that with this method,the cooling water is not used toits fullest advantage, since thewater nearest to the pipes willreceive most of the heat. 35. A more efficient cooler is acombination of the submerged,horizontal-pond cooler and a ver-tical cooler consisting of verticallead pipes connected at the topby U bends. The water
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. der, while the coolingwater is running in the oppositedirection, cooling the outside ofthe pipes. With good circula-tion of the water, a fairly goodcooling is obtained; but it isobvious that with this method,the cooling water is not used toits fullest advantage, since thewater nearest to the pipes willreceive most of the heat. 35. A more efficient cooler is acombination of the submerged,horizontal-pond cooler and a ver-tical cooler consisting of verticallead pipes connected at the topby U bends. The water isspra3ed onto the pipes at thetop, and flows down along thepipes, forming a thin film aroundthe pipes. With this cooler, thegas may be cooled nearly to thetemperature of the water. Acooling system of this type isshown at D in Fig. 13. 36. A still more efficient cooleris the patented cooler, Fig. 7,in which a great number of1-inch lead pipes A are arranged vertically, and are connected to headers at top ami bottom. Thecooling water enter- at (, at the top of the cooler, and leaves at. 7. §4 PREPARATION OF THK COOKING ACID 21 D, at the bottom of the cooler; the gas enters the bottom headerat E, leaving through the top header at F. This cooler offers alarger cooling surface for the gas and uses much less water thanthose already mentioned. It may be considered a disadvantageof this cooler that the rather narrow pipes may be plugged, incase of much sublimation of sulphur. 37. In order to obtain an effective mixing, and consequentcooling of the gas, a new cooler has recently been developed. It 1 I Solubility of JOztff Wafer at Various TerQperafurea 4030200 0 3 It » /J h J Z 5 Fig. 8. consists of corrugated lead plates, connected up to headers andforming chambers, through which the gases pass while the waterflows on the outside. The corrugated sides effect an intimatemixing of the gases and afford a large cooling surface. The important point with a cooler is that it have suff
Size: 880px × 2840px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
