A Practical Manual On Sea Water Distillation
With A Description Of The Necessary Machinery For The Process

MULTIPLE DISTILLATION. 197 stated. The expression “ horse-power ” is sometimes misunderstood. 56. The following Table N, giving a list of boilers (Cornish and Lancashire type) suitable for sea water evaporation, which has been found to answer well after many years" use. The coal consumption is given without multiple effect. TABLE N . Evaporation from Sea Water, in Practice (lbs. per Hour). Size of Boiler. Diam. x Length. Ft. In. X Ft. Heating Surface in Sq. Ft. Grate Surface for Coal in Sq. Ft. Coal Consumed per Hour, Lbs. Approx. Weight Boilers of 100 Lbs. W.P. Tons Avdp. 480 3’8 x 12 148 6’5 60 25 630 4-6 x 12 186 7-2 80 31 720 4-6 x 15 216 8'5 85 3-7 850 4-9 x 15 246 10 90 41 1,000 4'9 x 18 292 11 105 5 1,100 5'0 x 20 323 12 110 5'5 1,300 5'6 x 21 373 135 134 6-9 1,500 5'6 x 24 420 15 150 7'9 1,700 5-9 x 26 476 17 170 9-4 1,900 6 x 22 481 19 190 9-5 2,200 6’3 x 24 558 22 220 10-25 j 2,580 6'6 x 26 656 25 255 12'0 1 2,820 6’9 x 28 725 28 280 12'85 3,100 7 x 30 800 31 310 15-25 3,300 7-6 x 30 853 33 330 19-25 3,600 8 x 30 924 36 360 21-0 4,000 8-6 x 30 962 40 400 23'0 4,500 8'6 x 35 1,116 45 450 25-0 5. Boiler Fittings. 57. The usual fittings and mountings included are as follows :— (1) A pair of safety valves (usually weight and lever type) fitted to the top of the steam dome. (2) A steam valve in combination with the safety valves (1).