Patent GB-791781-A (GB)
Title: Improvements in apparatus for producing combustible gases
IPC: C10G9/00
Filed: 1956-01-03
Abstract: 791,781. Producing combustible gases from liquid and gaseous fuels. COMPAGNIE GENERALE DE CONSTRUCTION DE FOURS, and CASSAN, J. H. F. Jan. 3, 1956 [Jan. 6, 1955], No. 201/56. Class 55 (2). Apparatus for the production of combustible gases from gaseous or liquid fuels comprises at least three independent sector-shaped reaction chambers A, B and C (Figs. 1 and 2) filled with refractory or catalytic material and which open at their upper ends into a common dome-like chamber 2 and at their lower ends have pipes TA, TB and TC (the latter not shown) used in turn for the supply of gaseous fuels and gasefying agents and the exhaustion of combustible gas and flue gases. In use two chambers are employed to produce combustible gas while the other is being reheated. Thus in converting gaseous fuels the gaseous fuel and gasefying agent (steam of CO 2  with or without air) are e.g. introduced by pipe TA into the chamber A, the partly reacted mixture enters the chamber 2 and passes downwardly through e.g. chamber B leaving by pipe TB. During this period the chamber C is being reheated by injecting air from a nozzle 7C so that a combustion mixture passes down into the chamber C through an opening 6C (not shown), flue gases are withdrawn at TC (not shown). Chambers A and B are in turn reheated, air injecting nozzles 7A and 7B being provided in alignment with openings 6A and 6B respectively. When liquid fuels are gasefied the dome-like chamber 2 is provided as shown in Fig. 9 with an injecting nozzle 45 liquid fuel being supplied by the pipe 46 and, an atomizing fluid by pipe 47. In this case the first of the two reaction chambers preheats the gasefying agent (steam or a mixture of steam and air) and the liquid fuel is gasefied in the dome and during downward passage in the second chamber. The sequence and duration of the phases of operation may be controlled by a set of electrically or pneumatically operated valves remotely controlled. The regulating valve shown in Figs. 4 and 5 comprises a stator 9 and a rotor 10 constructed as a plug cock having a plurality of separate ways. The stator is divided diametrically by a wall 11 (Fig. 5), one half of the stator being further divided as shown in Fig. 4 into semi-annular chambers 12, 13, 14 and 15 while the other half is divided into sector-shaped chambers 16, 17, 18, 161, 171 and 181 (16<SP>1</SP> and 181 not shown). The chamber 16 is connected to the pipe TA of the gas-producing apparatus; the chamber 17 is connected to the pipe TB and the chamber 18 to the pipe TC ; the chambers 161, 17<SP>1</SP> and 18<SP>1</SP> are connected to the air injection pipes 8A, 8B and 8C respectively. The rotor has four ports 19, 20, 21 and 22, ports 19, 20 and 21 connecting chambers 12, 13 and 14 optionally with chambers 16, 17 and 18, and port 22 connecting chamber 15 optionally with chambers 161, 171 and 181; ports 19, 20 and 21 are so placed that their axes form with one another angles of 60 degrees, while ports 21 and 22 are .parallel. The rotor is rotated through 60 degrees by the shaft 23 to effect a change in the production phase. In a modified change-over valve, a rectangular box is divided into two sections by a horizontal partition. One section has two longitudinal partitions and one transverse partition forming air compartments, one each being connected to the pipes TA, TB, TC, 8A, 8B and 8C, while the other section has three transverse partitions, one being coplanar with the transverse partition in the first section, forming four compartments connected respectively to the source of basic fluid to be converted, the collector for the combustible gas produced, the discharge flue and a source of air under pressure. The horizontal partition is provided with twelve valved ports connecting the compartments on either side of the partition, the valves being operated in the desired sequence by three cam-shafts rotated synchronously.