Abstract: A nozzle plate construction for underjet coke ovens for distributing and metering combustion-supporting air supplied upwardly to regenerators through a sole flue extending parallel to the chamber axis. The sole flue is closed at the top by plate elements having apertures therein. In accordance with the invention, the various plate elements are in the form of troughs having plane base plates each formed with one longitudinal gap therein. Associated with each longitudinal gap is a metering element so mounted at its ends so as to be adjustable in its distance from the plane of the base plate. In this manner, the air flowing upwardly into the regenerator sections can be accurately controlled and uniformly distributed. At the same time, the nozzle plate construction of the invention is light in weight while being very stable and easy to assemble.

Abstract: Coking chambers in a coke oven battery are disposed in an alternate relationship with heating flues. At the top of each coking chamber there is a top arch having an inner-arched surface defined by a segment of a circle whose diameter is greater than the internal width of the coking chamber. The coking chamber is bounded by two heating walls which are extended to the spring of the arch where wall portions extend in an inclined manner upwardly and outwardly to form a mushroom-shaped gas-collecting chamber above the coke oven chamber. These wall portions extend at an angle of approximately 30.degree. to 50.degree. to the horizontal. The diameter of the arched wall portions for the arch is approximately between 30% and 60% greater than the internal width of the coking chamber.

Abstract: A coal-leveling apparatus includes a leveling rod supported by a pressing machine for movement through a leveling opening into a mushroom-shaped gas-collecting space to level the coal charged in the coking chamber of a coke oven. The leveling rod includes a head element that carries two support members that can move on pivot levers between an operative position wherein the support members are extended from the head element for support by upwardly-inclined wall surfaces in the mushroom-shaped gas-collecting space. In the inoperative position, the support members are retracted toward both sides of the head element. An actuating rod extends through the leveling rod to the head element. In one embodiment, the actuating rod can be moved in opposite directions of its length. An end of each of the first pivot levers is connected to the actuating rod and the opposite ends of the first levers are connected to second pivot levers.

Abstract: Burner tubes for coke oven heating flues and method and apparatus for inserting and/or removing the same from burner nozzles. The burner tubes themselves can be inserted or removed from burner nozzles permanently installed in the sole of a heating flue and comprise thin-walled alumina elements provided with external fins adapted to engage the top edges of the burner nozzles. The apparatus for inserting and removing the tubes comprises two pivotally-connected rods, the lower of which is adapted to carry either a fixture which can insert a burner tube into a burner nozzle or a fixture which can remove a burner tube. In either case, the fixture is such that it can be engaged with, or disengaged from, a burner tube by manipulation of the uppermost pivotally-connected rod without manual contact with the tube in the heating flue itself.

Abstract: A coke oven adapted to be regeneratively heated by lean gas or rich gas at choice, characterized in that control flaps are disposed in air inlet chests for the coke oven regenerator and are connected through linkages to a common actuating rod extending along the coke oven battery. Reciprocation of the actuating rod in one direction or the other will open or close all flaps essentially simultaneously to rapidly change the quantity of combustion-supporting air supplied to the regenerator, depending upon whether lean or rich gas is being used.

Abstract: Thin-walled corundum tubes form smooth and pore-free surfaces for supplying non-preheated gas to the burners in heating flues between coking chambers of a coke oven. Silica blocks forming a burner in the heating flues have an enlarged opening to receive the tube so that the tube projects a short distance from the top of the burner and extends therealong below the floor of the heating flue. The tube is made of corundum or similar refractory material to prevent the accretion of carbon which precipitates at a high temperature from the rich gas.

Abstract: Regenerative changeover of a coke oven battery is designed for operation according to a method wherein each regenerative half period is broken down into a time when gas is supplied at a constant pressure to the burners in heating flues and a time when no gas is supplied. A final control facility acts on the regenerative changeover facility to enable the regenerative half period to be broken down into these two time periods. A controller is responsive to variations in gas properties, such as the calorific value, density, humidity and temperature, to bring about operation of the final control element so that the heating time and the pause in every regenerative half period have values such that the heat supplied to the battery in each half period remains constant.

Abstract: The operation of a battery of coke ovens with regenerative change of draught on heating flues includes adjustably controlling the combustion of gases in the heating flues to insure uniform vertical heating of the coking coal in the coke oven chambers. Control elements for the operation of discrete heating flues in each heating wall are adjusted to insure uniform heating of the coking coal along the length of the heating walls. A gas supply rate is selected for the delivery of gas into the heating flues to define a carbonizing time corresponding to a high output capacity of coke from the coke oven battery. The heat consumption by the coking coal in the coke oven chambers is reduced during each regenerative half period by interruptions to the supply of gas at the gas supply rate without modifying or adjusting the control elements employed to insure uniform heat distribution in the heating flues.

Abstract: Gas-flow resistance elements are incorporated in each of the rich-gas distribution lines, the lean-gas distribution ducts and the smoke-gas ducts forming part of a battery of coke ovens. The flow resistance elements are employed to insure uniform and adequate distribution of combustion media along the individual rows of heating flues of the coke oven battery. Substantially identical gas-flow resistance elements in the rich-gas distribution lines reduce the flow of rich-gas by an amount which is greater than 50 mmWG whereby, for example, a rich-gas head pressure of 120 mmWG is reduced to approximately 70 mmWG. Substantially identical gas-flow resistance elements in the lean-gas distribution branch ducts reduce the lean-gas pressure therein by an amount greater than 100 mmWG. Substantially identical gas-flow resistance elements in the smoke-gas ducts reduce the flow of smoke-gas therein by an amount corresponding to a loss of head pressure which is greater than 15 mmWG.