Suction gas plants . Fio. 52.—Rowe, 1903. air supply is so reduced that decomposition only of the tar cantake place. In the Rowo producer the outer chamber containsthe bituminous coal, while the central retort contains coke. The. Fig. 63.—Sutherland, 1882. distillates formed in the upper part of the outer chamber aredecomposed in the central retort. Sutherlands producer consists of two chambers, which are used 190 SUCTION GAS PLANTS. alternately for gas production and tar decomposition. Bellemploys three chambers, connected together in series. By anarrangement of valves the order of the chambe
Suction gas plants . Fio. 52.—Rowe, 1903. air supply is so reduced that decomposition only of the tar cantake place. In the Rowo producer the outer chamber containsthe bituminous coal, while the central retort contains coke. The. Fig. 63.—Sutherland, 1882. distillates formed in the upper part of the outer chamber aredecomposed in the central retort. Sutherlands producer consists of two chambers, which are used 190 SUCTION GAS PLANTS. alternately for gas production and tar decomposition. Bellemploys three chambers, connected together in series. By anarrangement of valves the order of the chambers can be variedso that the chamber which has previously been heated up bycombustion is employed for the decomposition of the tar. Forthe decomposition of the tar to be satisfactorily carried out, thelayer of coke must be of considerable depth, and hence thoseproducers which most nearly carry out those conditions wouldprobably give the best results. Those producers which depend for their action on the drivingforce of a jet of steam are not suitable for use with very bituminouscoal, as the reduction of the steam lowers the temperature too
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