Patent GB-509104-A (GB)
Title: Improvements in or relating to the hydraulic disruption of solids
IPC: C10B33/00
Filed: 1938-10-13
Abstract: 509,104. Rotary spray-producers. FIFE, J. G. (Naamlooze Vennootschap de Bataafsche Petroleum Maatschappij). Oct. 13, 1938, No. 29720. [Class 69 (iii)] [Also in Group III] Coke formed in the reaction or coking chambers of cracking plant is removed therefrom by directing against the body of coke a confined jet of water i.e. a jet which does not break .up or spread before impact, with a velocity sufficient to break the coke into lumps and removing the lumps from the chamber. The operation is preferably carried out in three stages as shown in Figs. 4-6 comprising (1) cannulating the coke, i.e., forming a channel therethrough (2) widening the channel (3) removal of the main body of coke in lumps. A jet velocity of 200-300 feet per second is used under a pressure of 1,200 lbs. The coking vessel 1 is mounted on a support 2 under which' rails 34 for coke cars are provided. Water is supplied from a tank 10 and pumped through lines 12, 14 to a vertical supply pipe 9 having a sliding movement in a supporting tower 4. The water, after passing through the vessel 1, collected by a shield and aprons 33 and fed through a trough 29 to a settling basin 30. The pipe 9 passes through a perforated plate 19 fitting in a manhole 3. A spear nozzle 35, Fig. 7, is first fitted to the end of the pipe 9 and water is directed therethrough under pressure of 1,200 1bs. until a vertical hole is cut through the coke. This step may also be effected by drilling. The width of the hole is then increased by fitting a rotating reaming head, Fig. 8, comprising a hollow body 39 with nozzles arranged on elbows 41 so that the body is rotated by the reaction of the water jets. The main body of coke is then removed by substituting on the pipe. 9 cutting nozzles, Fig. 10, comprising upper and lower groups 47, 47a, the latter being supported adjustably by chains 56 on swivels 55. The reaming and cutting operations may be carried out in one operation. The second and third steps may also be carried out in one operation by means of a composite nozzle head, Fig. 14, comprising three sections (1) a rotor section 117, 120, 102 mounted on ball bearings and provided with elbow nozzles 129 fed from ports 108, Fig. 17, and scrapers 132, 133 (2) a first cutting section comprising a pair of curved pipes leading to nozzles 145 and covered by a shield plate 152 (3) a second cutting section comprising a pipe 154 connected by swivel joints to adjustable nozzle pipes 159 which may be folded upwards for entry into the chamber. A modified cutting head for the first operation comprises a water pipe 170, Fig. 20, welded to an enlarged housing 171 having a central cone 171a, and depending curved conduits 175, 176 provided with pairs of nozzles 145 at different levels, connection being made to the next section by a pair of pipes 172. The nozzles are arranged to rotate the head in opposite directions but with different strengths and magnitude of the turning movement can thus be adjusted. The first two operations can be carried out together by means of the modified head, Fig. 28, provided with four sector shaped cutting blades 222 through which project elbow nozzles 226, and a centrally disposed spear nozzle or star shaped drill 237.