Patent GB-281221-A (GB)
Title: Improvements in or relating to coking retort ovens of the vertical chamber type
IPC: C10B3/02
Filed: 1927-05-27
Abstract: 281,221. Koppers Co., (Assignees of Ackeren, J. van). Nov. 27, 1926, [Convent'ion date]. Retort furnaces; discharging. - In a vertical coke oven of the kind in which the heating walls 7 between the retorts 6 are formed with separately-fined primary and secondary combustion zones, each combustion flue of which is in series with a section conveymg hot gases, the two zones are provided with separate waste-gas outlets and the combustion flues are arranged to cover substantially the whole area of the heating wall. As shown, the upper combustion flues 28, which receive preheated air and gas direct from flues 31, 32 leading from regenerators 8, alternate with vertical passages 33 connected alternately to the air and gas flues 31, 32 respectively, and having, in the brickwork 30 separating the upper and lower combustion flues 28, 29, branches 34 so that each passage 33 serves two of the lower flues 29. The connections between the flues 28, 33 and the air and gas supply flues 31, 32 are controlled by sliding bricks manipulated through holes in the top of the wall 7. Where rich gas is used, it is supplied without preheating through conduits 37 having connections 38, 49, Fig. 8, delivering into the upper ends of the respective combustion flues 28, 29. The products of combustion from the upper flues 28 are withdrawn through ducts 40, 41, Fig. 3, formed in the brickwork 30 and communicating with passages 42 arranged between the lower flues 29, these passages delivering into an horizontal bottom flue 43. The waste gases from the lower flues 29 pass into a second bottom flue 44 which extends parallel to the flue 43 and joins with it at the end 3 of the heating wall to form a crossaround flue 45 connected to the bottom flues 43, 44 of the adjacent heating wall. The waste gases are thus distributed to the flues 28, 29 of the adjacent heating wall and passing upwardly therethrough to the flues 31, 32, enter the regenerators 8 associated with that wall, from which they escape to the stack. Reversing-means are provided in connection with each pair of heating walls. Each flue 44 is fitted with a sliding brick 46 which regulates the quantity of waste gases flowing therethrough and thus provides an additional control of the distribution of gas and air between the primary and secondary combustion flues. As shown in Fig. 2, the lower end of each retort 6 is provided with a rotary extractor 23 which delivers the coke, after quenching, into a collecting chamber 24, from which it is periodically discharged through a water-sealed door 25. The retorts 6 and heating walls 7 are arranged between one outer wall 3 of the setting and an intermediate wall 5, Fig. 1, while between the latter and the other outer wall are disposed the regenerators 8; unequal heating of the wall 4 is prevented by the provision, at the end of each regenerator, of a flue 52 through which, during heating-up of the battery, the hot gases are allowed to flow, these flues being, after the operating temperature has been attained, either closed by bricks 53 or filled with refractory material. Each retort 6 is provided, at the top, with a gas-offtake 15 leading to the primary gas main 16, and, at a lower level, with an additional offtake 17 communicating with the secondary gas main 18.