Patent GB-902299-A (GB)
Title: Improvements relating to gas producers
IPC: C10J3/00
Filed: 1960-05-05
Abstract: 902,299. Gasefying carbonaceous material; charging and discharging gas producers. FERDINAND LENTJES STIFTUNG, [trading as FERDINAND LENTJES KESSELSCHMIEDE UND MASCHINENBAU]. May 5, 1960 [May 21, 1959], No. 15977/60. Addition to 884,740. Classes 51 (2) and 55 (1). In a gas producer for producing CO-containing gas in accordance with the parent Specification, the charging device comprises a shaft 5 forming an extension of and in line with the reaction chamber 7 and having the same cross-section into which a fuel-supply passage 6 opens laterally and in which is a movable fuel-compressing piston 8, and an oxygen-containing gas is supplied laterally at 17 to the chamber 7 from the outside, the gas produced passing through a wall 19 of the chamber 7 having intersecting gas-outlet slots 27 running longitudinally and transversely. In the form shown, the wall 19 consists of tubular bars 20, preferably trapezium-shaped in cross-section, with a longitudinal bore 21 for water passage in the narrower part remote from the chamber 7 whereas the slots 27 in the wider surface 26 of the bars 20 facing the chamber 7, enter at the rear ends into transverse bores 28 forming the gas outlet. The bars 20 are made in one piece by machining from solid material. The parts of the bars 20 between the slots 27 are slightly bevelled at 20 so that the parts which follow in the direction of feed of the fuel are somewhat set back relative to those before them. The piston 8 is hydraulically driven and its forward movement, taking place considerably more slowly than its backward movement, is controlled to suit the feed of the fuel or the speed of operation of the slag-discharge device. The piston 8 is directly connected to a double-acting piston 8<SP>1</SP> moving in a cylinder 30 connected through pipes 31 and 32 to a reversing valve 33 communicating through a pressure-pipe 34 with a pump 35, and from which leads a pipe 37 acting as the return pipe to an oil supply container 36. In the pipe 31 is interposed a throttle valve 38 in which and in the pressure-pipe 34 there are excess pressure-valves, e.g. 39, communicating through pipes 41 and 40 with the return-pipe 37, and the valve 33 has a reversing slider 42 co-operating with end-stops 43 and 44 connected to and moving with the piston 8<SP>1</SP>. When the stop 43 meets the end 42<SP>1</SP> towards the end of one movement of the piston 8<SP>1</SP>, the valve 33 is reversed and pressure medium flows through the pipe 31 and throttle valve 38 into the cylinder 30 to move the piston 8<SP>1</SP> outwards and pipe 32 is connected to the return-pipe 37 to assist the movement. The stop 44 then meets the slider end 42<SP>11</SP>, the valve 33 is again reversed, and the medium flows through the pipe 32 to the cylinder 30 on the outside of the piston and away from the lower side thereof through the pipe 31 and the pipe 37. The slag-discharge device consists of a rotary slag-discharge drum 9 closing the bottom of the chamber 7 and formed like a milling cutter, co-operating with a slag-retarding device 10, pressed against it by spring-actuated pistons 11, and having below it a slag container 12 closed to the outside by a double-closure means. The wall at 17 consists of plates 17<SP>1</SP> of heat-resistant metal, arranged in grate-like form and transversely adjustable relative to the fuel bed. The inlet passage 14 for the incoming gas from a blower 13 is subdivided into zones 15 with slidable closuremembers 16 for individual regulation of the amount of gas therefor.