Patent GB-780766-A (GB)
Title: Coke oven battery
IPC: C10B21/20
Filed: 1955-03-22
Abstract: 780,766. Coke ovens. KOPPERS CO., Inc. March 22, 1955 [April 20, 1954], No. 8324/55. Class 51 (2). In a twin flue, regeneratively heated, compound coke oven battery, regenerators 14 disposed across the battery beneath each coking chamber 4 are separated by walls 16 divided by a vent space or passage 18, which extends down to the concrete mat 2, and is supplied with air through controllable inlets 20 and associated ducts 22 extending through the mat 2. A plurality, e.g. four, of ventilating ducts 24 extend from each vent space 18 to the tops 10 of twin flues 8 in the corresponding heating wall, thereby maintaining a pressure in the vent spaces substantially equal to that in the upflow regenerators or in the rich gas risers when in use, and thus preventing leakages of lean or rich gas into the downflow regenerators. The rich gas risers 36 are disposed in each wall 16 on either side of the vent space 18 and are supplied from headers 38 in the battery basement. The regenerators 14 are divided into compartments 28 by walls 30, each compartment being connected by ducts 31 with two of the twin flues 8 in the two heating walls on opposite sides of each coking chamber. Each regenerator is associated with a pair of sole flues 32 connected to the regenerator compartments by ports 34, one sole flue being connected to every alternate compartment in each regenerator, and the other sole flue to the remaining compartments. One limb of each twin flue 8 is connected by the ducts 31 with two compartments of a regenerator in one side of a wall 16, and the other limb with two compartments of the regenerator on the other side of the said wall. Expansion joints 40 are provided in staggered relationship across the battery and below adjacent twin flues, so that ducts 31 and the rich gas risers 36 which are connected to the limbs of the twin flues, do not pass through the joints. In a modification, Figs. 46 (not shown), further expansion joints are provided lengthwise of the battery between the twin flues and also in the dividing walls 30. Another modification, Fig. 7, has a pair of air and lean gas headers 48 disposed beneath each pair of sole flues 32 and connected to the regenerator compartments above, independently of the sole flues, by ducts 50 having throttling devices 52 accessible from the battery basement. Each throttling device, Fig. 11 (not shown), incorporates a bushing carrying a flexible pressure measuring tube, which can be inserted through the ducts 50 into the base of the regenerator compartments. Waste gas ducts, similar to the ducts 50, connect alternate regenerator compartments to a header independent of the sole flues, the other compartments being connected to one of the sole flues. Throttling devices 56 are associated with each of the aforesaid waste gas ducts, and are also operable from the basement. A final modification, Fig. 10, has the by-pass ducts 50, and the air and lean gas headers 48 prefabricated together with steel pedestals 62 and steel plates 64 provided with expansion joints 66, the whole assembly being placed as a unit on beams 68 supported by columns 69. This assembly forms a support for the concrete pad 2 which is cast around it. Specification 171,117, [Class 51 (ii)], is referred to.