Modern Gasworks Practice

812 INDEX Specific gravity of gas oil, 729 of various gases, 787 of water gas, 737 Sperm, Ib. per ton of coal, 364 Stage retort house, 55 cost of, 52 Standard price, 5 Station, governors, 22 meters, cost of, 40 Statutory Company, 5 Steam boilers, cost of, 31 general points on, 752 grate area for, 752 position of, 24 types of, 752 Steam, meters, 720 controller for water gas plant, 717 downward in vertioals, 165, 430 effect on gas yield, 113 effect on nitrogen yield, 387 exhaust for water gas manufacture, 741 for dry purifiers, 577 in direct fired furnace, 74 in horizontal retorts, 112, 424 in Woodall-Duckhani retorts, 155, 424 reactions, 69 required for water gas, 734 use in producers, 68, 85 Steel in concrete, 46 Stefan-Boltzman law, 239 Steinle thermometer, 230 Step grate, 83 Stopes, M„ 360, 382 Stopped ascension pipes, 248 Storage, of coal, 18, 26, 53 of gas, 22, 30 of oil, 732 of tar and liquor, 22 Stourbridge fireclay, 195 Stripped gas, 423, 432, 470, 732 Sturtevant exhausters, 499 Subway retort house, 55 cost of, 52 Suction gas, 738 Sulphate of ammonia, Burkheiser prooess, 539 Cobb’s process, 545 cost of plant, 32 direct recovery of, 539 Feld process, 542 liquor, etc., required for making, 789 plant capacity, 23 recovered at gasworks, 533, 789 space occupied by, 363 yield of, 386, 392, 427, 428, 789 Sulphur compounds (CS2, etc.), 395, 506, 570 Absorption processes for, 616 Adam’s process, 616 aniline absorption, 617 Sulphur compounds (CS2, etc.), Athion process, 619 Berk’s process, 615 Carpenter-Evans process, 610 charcoal absorption of, 616 in water gas, 737 Leamon’s process, 615 nature of in coal gas, 614 reduction by various processes, 610 removal with lime, 594 Rideal-Taylor prooess, 614 Soddy’s process, 617 Sulphur, distribution of, 397. in coal, 361, 394 in coal gas, 506 in gas liquor, 505 in waste gases, 95 Sulphuretted hydrogen, evolution from coal, 395 catalysis and, 616 contamination by in gasholders, 688 in coal gas, 570 in gas liquor, 505 in water gas, 737 reaction with ammonia, 502 reaction with lime, 594 reactions with oxide of iron, 572 removal of, 571 Sulphuric acid required for sulphate manufacture, 789 Sunday stoppage of gasmaking, 133 Switches, electric, 349 Tar, box, 263 composition of coal, 452 effect on naphthalene, 451 electrical precipitation of, 456 estimation of in gas, 458 extractors, 450, 453 fog, 449, 458 from complete gasifioation of coal, 768 quantity yielded by various processes, 760 Reflux Pressure System for removal of, 268 removal from hydraulic main, 261 solvent action of, 450 storage of, 22, 31 towers, 263, 271 washing, 423, 451 water gas, 468, 469, 736 yielded in oondensers, 449, 452 Taussig, 215 Taylor, H. S., 614 Tees producer, 119 Telphers, characteristics of, 328 comparison with conveyors, 333 cost of, 336 for coal, 326