THE HORIZONTAL RETORT BENCH 107
No. II
Setting of “ Eights,” in three rows, 22 inches x 16 inches x 20 feet retorts. Say, 10 beds, carbonizing 90 tons of coal per diem. Capacity, 1| million cubic feet per diem, straight coal-gas.
£ s. d.
Foundations and excavations for bench and chimney . 6 0 0 per mouthpieoe.
Arches, spandrils, main flue . . . . 37 0 0 „ „
Buckstays and steel bracing . . . . .7 5 0,, „
Chimney: Brickwork, £4 12s. 6<Z. ; bracing, £2 12s. 6rf. 7 5 0 „ „
Mouthpieces, hydraulic mains, ascension pipes (both ends of
retorts), foul mains . . . . . . 45 0 0 „ „
Tar towers and fittings . . . . .3 0 0,, „
Retort settings, producers, prodcuer ironwork, etc. . 70 10 0 „ „
£176 0 0 per mouthpiece.
(Pre-war . £53 10 0 per mouthpiece.)
i.e., £313 per ton of coal per maximum day. (Pre-war £95.)
Or £22 10s. per 1,000 cubic feet of gas per maximum diem. (Pre-war £7 12-s.)
No. III
Setting of “ Six,” in three rows, 22 inches x 16 inches x 10 feet, stop-ended. Say, three beds, carbonizing 11 tons of coal per diem. Capacity, 130,000 cubic feet per diem, straight coal-gas.
£ s. d.
Foundations and excavations . . . . . 10 10 0 per mouthpiece.
Arches and spandrils . . . . . • . 44 0 0 „ „
Buckstays and steel bracing . . . . .900,, „
Chimney . . . . . . . ■ . 7 10 0 „ „
Mouthpieces, hydraulic mains, and all retort ironwork. 39 0 0 „ „
Retort settings, producer, and producer ironwork . 67 0 0 „ „
Tar tower and fittings, tar main, etc. . . 6 10 0 „ „
£183 10 0 per mouthpiece.
(Pre-war . £57 0 0 per mouthpiece.)
i.e., £300 per ton of coal pei* maximum day. (Pre-war £95.)
Or £25 10s. per 1,000 cubic feet of gas per maximum day. (Pre-war £7 17-s. 6<Z.)
INCLINED RETORT SETTINGS
Little attention need be given to inclined retorts, which, although. still employed, can scarcely be considered as appertaining to modern gasworks practice. The originator of the system, M. Coze, designed his settings with the retorts set at an angle of 32° with the horizontal—i.e., the theoretical angle of repose of coal. The cliief merits (also largely theoretical) were the absence of charging and discharging machin-ery and the wear and tear connected with this apparatus, also only one ascension pipe was employed, this being at the lower end of the retort. Other experimenters have worked with the retorts at various angles ranging up to 45° ; but it is now generally