Modern Gasworks Practice

814 INDEX Washer-scrubbers, Standard, 515 Whessoe, 517 Waste gases, from retort bench, 64 iron dust in, 196, 209 steam raised by, 90 sulphur in, 95 temperature of, 64, 65 Waste heat boilers, for retort settings, 88 for water gas plants, 743 Water Gas, advantages and disadvantages of, 690 amount made in U.K., 690 and naphthalene, 470 automatic Control of steam, 717 benzol recovery from, 423, 732 blow, 722 blue, 708, 734, 738 calorific power of, 34, 420, 736, 738 candle power of, 420, 736 carbon dioxide in, 694, 716, 719, 736, 738 carbon monoxide in, 694,716,719,736,738 carburetted, 734, 736 catalysis and, 695 Chemical equilibrium in, 693 Chemical reactions involved, 692 coke required for, 734 composition of blow gases, 712 composition of gas during run, 716 composition of mixed with coal gas, 420, 421, 736, 757 continuous process, 698 cost of manufacture, 734, 763 post of plant for, 33 cost of plant per therm, 33 depth of fuel bed, 715 effect of atmosphere on, 730 effect of stripping, 732 effect of temperature on reactions, 430, 693, 716 from exhaust steam, 740 fuel for steam raising for, 734, 762 history of, 689 impurities in, 737 industrial uses of, 751 intermitten! process, 698 made from coal, 740, 756 oil required for, 734, 736 oil used for enriching, 34, 420, 734, 736 oxygen process, 698 period of run and blow, 725 practical considerations affecting, 715 purifiers for, 21 refractories for plant, 216 relief holder, 34 steam required for, 716, 734 synthetic methane from, 695 tar, composition of, 468, 469, 736 temperatures, 423, £93, 716, 726 Water Gas, theory of manufacture of, 692 thermal efficiency of, 763 thermal nature of reactions, 693 value of, 137, 690 waste heat recovery and, 743, 761, 763 Water Gas Plant, air meters, 724 blowers for, 712 blue, 708 chequer brioks for, 216 Dellwik, 709 efficiency of, 743 fans for, 712, 723 fuel spreader, 721 Humphreys and Glasgow, 699 K. and A., 707, 708 Lowe, 701 Merrifield-Westcott-Pearson, 704, 706 modifications of, 747 oil sprays, 727 refractories for, 216 Simplex, 710 steam controller for, 717 steam meters for, 720 temperatures in, 423, 693, 716, 726 turbo-blowers for, 713 various types, 698 waste heat boilers for, 743 Water, as a lubricant for exhausters, 491 composition of coal washery, 217 contamination in gasholders, 688 data relating to, 791 pressure on gasholder tanks, 674 required in serubbers, 531 required in wet purification, 508 trouble from, 10, 55 vapour evolved from coal, 381 Watkin heat recorder, 232 Watson Smith, 387 Watts, 354 Wear and tear, extent of, 281 Weathering of fireclays, 195 Wedge pyrometer, 229 Weir valve, 263 Weldon mud, 573 Wells, for tar and liquor storage, 22, 31 Wendt, Karl, 66 West and Wild’s continuous retorts, 109 West, ■/., 320, 424, 432 West’s hot coke conveyor, 319, 321 Wet purification, 501 operation of plant, 507 plant for, 20 products removed by, 501 reactions involved, 502 rules for capacity, 20 Weyman, G., 577 Wheatstone’s bridge, 234 Wheeler, R., 360, 382, 406