Modern Gasworks Practice

INDEX 809 Oxygen in coal gas, 412, 420, 423, 736, 738 in complete gas, 757 in dry purification, 578, 579 in waste producer gases, 64 in water gas, 736, 738 Paraffin hydrocarbons, 399, 424 Parkinson and Cowan’s retort house govemor, 277 Parr, S. W., 373, 395 Parrish, P., 534 Paterson, J618 Paterson, R. O., 618 Peebles oil gas process, 698 Pclouze and Audouin tar extractor, 453 Perkin, M., 432 Perkin, Sir William, 3 Petit liquor process, 537 Phenol, 400, 503 Piles, 42 Pintsch regenerator, 99 Pitch, in hydraulic mains, 273 Poker, mechanical fumace, 305 Pole’s formula for flow of gas, 792 Porosity of fireclay articles, 202, 206, 210 Porteous, J. W., 394 Porter, 383 Powéll, 395 Power plant, cost of, 28 electrical, 342 Pressure, allowable on soils, 47 effect of level on, 10 Grille grate, 67, 69 in various parts of plant, 479 statutory gas, 5 Pi’ice of gas, 13, 763 Primary adjustment, 67 admission of, 82 air, 57 Primary products of carbonization, 381, 416 Pi’ojectors, coal stop for use with, 289 de Brouwer, 288 Drake’s, 292, 295 Propane in coal gas, 413, 422 Propylene, calorific power of, 402 in coal gas, 413, 422 in oil gas, 732 Provisional Order, 7 Proximate analysis of coal, 363 Prussian blue in oxide of iron, 551 Public Health Act (1875), 8 Puddled gasholder tanks, 673 Pumps, size and capacity of, 789, 790 tar and liquor, cost of, 31 Purchase Clause, 9 Pushers (see under Charging and Disoharging Machines) Purification (see also under Wet Purification) absorption processes, 616 Adam’s process, 616 affeoted by cyanogen, 552 air admission during, 578, 581, 582 ammonia admission to, 578 amount of air required for, 579 arrangement for remo ving CO2, H2S, and CS2, 593 artificial materials for, 572 Athion process, 619 backward rotation, 580, 588, 591 “Brownox” for, 574 Burkheiser process, 539 by means of liquor, 533 Carpenter-Evans process, 611 catalytic processes, 610 Cobb’s process, 545 delayed catalysis and, 573 diluent effect of adding air, 582 disorganization of, 577, 582 dry, 570 effect of adding air, 582 effect of semi-direct aminonia recovery on, 576 evolution of heat during, 581 Feld process, 542 “ Ferrox ” for, 574 for sulphur compounds, 594, 610 forward rotation, 588, 591 general working points on, 585 influence of temperature on, 577 Laming’s mass for, 574 lime, 592, 594 liming coal and, 618 “ Lux ” for, 573 Metroxide for, 574 point of admission of air, 581 reactions, 572 removal of H2S, 571 reversal of flow in, 581 revivification of material, 572, 578 revivification reactions, 573 Rideal-Taylor process, 614 secondaiy reaction during, 577 steam admission for, 577 unoommon materials for, 575 Weldon mud for, 573 Purifiers (dry), air admission to, 578 centre valves for, 607 concrete, 598 construction of, 595 cost of, 29, 606 covers for, 601 depth of, 21, 600 depth of material in,’ 578 formation of ferrous sulphate in, 578 grids for, 6C5