Modern Gasworks Practice

806 INDEX Glover-West Vertical Retorts, 155 waste heat boiler for, 95 yield from, 18, 157 Gold recovery by cyanide process, 550 Governors, cost of, 31 exhauster, 485 retort house, 275 station, 22 water gas steam, 717 Grabs for coal and coke handling, 306 Grates, area required, 82 area required for bollers, 752 Grille type, 67, 69, 84 step, 83 Gravity bucket conveyors, 316 Gray, Thos., 391 Griffiths, E., 228 Grille grate, 67, 69, 84 Grog in fireclay materials, 195 Ground, nature and suitability of, 41 required for gas works, 14, 17 required for water gas plant, 690 Guest-Gibbons discharging charger, 299 Gumey’s jet, 527 Haber, F„ 409 Hahn, 214 Hamor, 373 Harper, JR. B., 740 Heat, balances of retort settings, 138 curtailment of losses of, 141 efficiency of various gasmaking processes, 759, 760 efficiency of water gas plant, 745 losses in ohimneys, 88 losses in producers, 66, 74 recovery of waste, 88, 743 units, yield of gaseous, 415, 427, 430 Heath, C. S., 452 Helps’ anti-dip, 261 complete gasification plant, 783 on gaseous mixtures, 782 Herring’s system of vertical retorts, 172 Hirsch fumace, 2C2 Hohmann and Maurer thermometer, 231 Hollings, H„ 391, 406, 408 Holmes-Winstanley system of vertical retorts, 174 Horizontal retorts (see under Retort Settings), 61 charging maehines for, 281 continuous, 109 control of, 125 light and heavy charges for, 418 manufacture of, 210 Rew’s system, 113 steaming in, 112, 424 Horizontal retorts, temperature of, 63, 411, 433 weight and duration of coal charge in, 418 West and Wild system, 109 Horse power, calculation of for conveyors and elevators, 337 electrical equivalent of, 354 for electrical retort house plant, 346 for exhausters, 19, 491, 493 for washer serubbers, 521,522 relation to kilowatts, 347 required for conveyors, 312, 318, 341 required for telphers, 328 thermal equivalent of, 354 Hot coke handling plant, .318 Hourly load curve, 14 Howe, R., 215 Hydraulic main, 253 agitators for, 274 Bloor and Fenwick’s, 256 continuous, 255 Drory, 256 funetions of, 258 methods of fixing, 257 Reflux Pressure System and, 268 reinforced concrete, 257 seal in, 258 sight gauges for, 272 Smith and Pearson’s arrangement for, 273 Hydrocarbons, aromatic, 399 chemistry of, 399 composition of in coal gas, 421 effeet of degradation on, 385, 401 effeet of radiant heat on, 385 efiect of steaming on, 427, 429 effeet of temperature on, 385, 401, 413 evolved from coal, 381 in coal, 358 in coal gas, 413, 420, 736, 738 in complete gas, 757 in oil gas, 698, 372 in water gas, 420, 736, 738 olefine, 399 paraffin, 399 saturated, 399 unsaturated, 399 Hydrocyanic acid (see under Cyanogen), 390, 501, 506, 551, 570 Hydrogen, as gaseous fuel, 70 atmosphere in retorts, 431 calorific power of, 402 effeet of on benzene, 410 effeet of steaming on, 429 effeet of temperature on, 413 in coal, 359, 361 in coal gas, 413, 416, 420, 422, 736, 738 in complete gas, 757 in mixed coal and water gas, 736, 738 in primary coal gas, 415