Modern Gasworks Practice

INDEX 803 Constructional points, 58 Consumption of gas per head of population, 12, 17 Continuous horizontal retorts, 109 Conveyors, band, 310 coal, 310 cost of, 336 power required for, 312, 318, 336 speed and capacity of, 312, 316 tclpher, 326 tightening device for chains, 309 travellmg skip, 324 types of, 308 Cooking stoves, cost of, 35 Coppée coal washei-, 369 Corrosion of Steel in concrete, 45 Corrosion, prevention of, 58, 671 Cort’s anti-dip, 261 Costs (see under each particular process or plant) Cmiddou, M., 249, 452 Creosote, as naphthalene solvent, 468 Cresol, resulting from decomposition, 410 Cripps, F. S., 628, 685 Cristobalite, 198 Curphey, W. S., 547, 653, 576, 577 Cyanogen, Bartlett Hayward process, 561 British Cyanides Co.’s process, 555 Bueb’s process, 560 conversion into ammonia, 564 Davis-Neill process, 558 effect on oxide of iron, 552, 578 extraction from spent oxide, 563 Foulis process, 554 hydrolysis of, 564 in coal gas, 570 objections to, 652 recovery by Davidson’s process, 536 recovery of, 550 South Metropolitan Gas Co.’s process, 560 test for in coal gas, 566 uses of, 550 various processes for recovery, 551 Williams polysulphide process, 556 Wilton process, 554 yield of, 388 Cyclone tar extractor, 450 Daily load curve, 14 Darwen ascension pipe, 249 chamber ovens, 189 Davidson, J. G., 457 Davidson, F7. B., 260, 414, 434, 582 Davidson’s anti-dip, 260 purification process, 536 De Brouwer hot coke conveyor, 320 De Brouwer projector, 288 pusher, 290 Declared calorific value, 6, 24 Degradation of hydrocarbons, 401, 415 Dellwik water gas plant, 710 Dempster’s complete gasification plant, 784 hot coke conveyor, 322 tar extractor, 454 washer, 510 Dempster-Toogood vertical retort system, 169 Density of various gases, 787 Depreciation, charge for, 281 Diatomaceous earths, 227 Dillamore tar tower, 263, 271 Diluents, combustible, 421 Dinas fireclay, 197 Dip pipes, 247, 252 anti-dips for, 258 Bergmann joint for, 253 chamfered, 252 joints for, 248 seal on, 258 serrated, 252 Diphenyl, 400, 410 Diphenyl benzene. 410 Direct ammonia recovery processes, 539 Direct-fired fumaces, 60 construction of, 70 fuel used in, 61 points on, 73 steam in, 74 Discharge of gas through pipes, 792 Discharging-chargers, 295 Distribution plant, expenditure on, 17, 35 DonTcin, E. B., 493 Doppelgas, 767 Downing and Pohlman, 730 Downward steaming, 165, 430 Dowson gas, 736 Drake’s complete gasification plant, 783 hydraulic main, 267 projector and pusher, 292, 295 travelling skip conveyor, 324 tray conveyor, 323 Draper coal washer, 369 “Draw,” regulation of, 134, 270 constant, 270 Dry maitis, 259 Reflux Pressure System and, 268 Dry purification (see under Purification) Dry purifiers (see under Purifiers) Dry well for gasholders, 677 “Dumpling” in gasliolder tanks, 674 Dundonald, 1 Dye industry, 3 Dynamo, 345