Abstract: A method and apparatus for conveying preheated coal particles to a coking chamber through an enclosed pipeline by means of a pressurized inert carrier gas, wherein the coal particles are charged into the top of the coking chamber through a portion of the pipeline wherein at least the end of which is disposed vertically or not more than 30.degree. from vertical. The advantages of the top charging technique include one or more of the following: reduced carryover of fine coal during charging, increased density of the charge of coal to be coked, reduced weight of carrier gas per unit weight of coal, improved uniformity of coal bed level throughout the coking chamber, and reduced carbon deposits on surfaces of the chamber above the coal charge and in the gas off-takes.

Abstract: The invention is a new design of chuck door which has a knife-edge sealing strip that fits tightly in a slot of the door and is adjustable longitudinally by jacking screws. The strip is locked in position also by screws. The inside of the chuck door is provided with a cavity within which heat insulating refractory material is retained. A pivoted heat shield hangs from extended side heat shields in the coke oven and pivots up to allow entry of the leveler bar through the opening closed by the chuck door. The design is readily adaptable to new and to existing oven doors.

Abstract: The invention is a new design of chuck door which has a knife-edge sealing strip that fits tightly in a slot of the door and is adjustable longitudinally by jacking screws. The strip is locked in position also by screws. The inside of the chuck door is provided with a cavity within which heat insulation refractory material is retained. A pivoted heat shield hangs from extended side heat shields in the coke oven and pivots up to allow entry of the leveler bar through the opening closed by the chuck door. The design is readily adaptable to new and to existing oven doors.

Abstract: The apparatus comprises a driven rotatable shaft carrying at its working end rotary scraper means and a tapered centering device in advance of the scraper means which is freely rotatable with respect thereto. The shaft end carrying the scraper means and the centering device is connected to the driven portion of the shaft by a universal joint. The scraper means are connected to the shaft behind the universal joint by several circumferentially spaced spring-loading means which normally keep the scraper means and centering device normal to the shaft but which permit those means to tilt relative to the shaft if the latter is angularly misaligned with a clean-out opening. Thus, the scraper tools are always in contact with a flat cover seat. The centering means have outwardly extending stops which make contact with the cover seat and limit the penetration of the centering means into the ascension pipe opening.

Abstract: A heating system for tall horizontal slot type coke ovens wherein the heating walls are provided with flues in which combustion occurs at multiple levels. The improvement lies in having a single flue stack of two channel design, each channel having port openings located at corresponding different heights or levels above the flue floor. When lead gas is employed for fuel, lean gas and air are supplied from different regenerator chambers to the separate channels respectively whereby a mixture of fuel gas and air is effected and combustion occurs at the port exit openings at each successive level. When rich gas is employed as a fuel, both regenerator chambers are employed to supply air for combustion through both channels of the stack and rich fuel gas is supplied by a separate distribution system to each vertical flame flue. Regulation of the flow of rich gas or lean gas from the two channels is provided by an adjustable brick means, such as a slide brick at the top of the two channels.

Abstract: A coke oven battery of the type that is underfired with coke oven gas, wherein a system of horizontal bus flues and valve controls therefor is provided for controlling the supply of lean gas fuel, such as blast furnace gas or any other lean gas, selectively to the gas flues in heating zones of the coke oven chamber walls and the recirculation of waste gas therefrom, so as to achieve the optimum fuel consumption under varying bulk density conditions of the coal mass in the coke oven chamber from the coke side to the pusher side.

Abstract: Coke oven emission control system comprising a traveling hood for collecting the emissions arising from the quench car into which hot coke is pushed from the coke ovens. The hood has a U-shaped snorkel at the top of the hood extending longitudinally of the hood, which connects to an exhaust duct via a water trough. Within the hood are a number of nozzles which are adjusted to provide a fogging mist of atomized water particles at the time a coke oven is "pushed" which cools the emissions which rise from the quench car and thereby reduces their volume as they flow into the exhaust duct. In a modification, a venturi type scrubber in the snorkel tube serves to separate the particulates, and cool the gases as they flow to the exhaust duct. In a further modification, high pressure jets are mounted on the snorkel tube within the water trough to agitate the particulates and solids on the bottom of the water trough to assist in their removal by draining from the trough.

Abstract: The specification discloses an automatic sequencing control system for operating a unit consisting of a pair of oil gas-producing generators in staggered sequence, each generator of which comprises a cooperating pair of reactor shells functioning alternately in a forward direction of product gas flow and in a reverse direction of product gas flow. The control system includes a start-up control, a burner control, a burner fuel ignition control, and an electric power failure control for heat and make periods of operation. An individual reverse flow wash box is provided for each generator and also a waste heat boiler common to both generators, valving for which is under control of sequencing control apparatus.The method of operation of a pair of generators disclosed enables operation within a narrow range of temperatures for long periods of time and without necessity for repair or rebuilding of reactor chambers.

Abstract: A knife edge type of sealing means for coke oven doors having edgewise flexibility permitting the knife edge strip to adjust inwardly and outwardly with respect to the plane of the seating surface of the door jamb as the door jamb warps under service conditions due to exposure to oven heat. A number of different forms are disclosed, in several of which the knife edge strip is made up of end-butting or overlapping sections jointed for relative expansive and contractive movement, the strip being tightly held in a transversely slotted retainer support of U-shape in cross-section, which is in turn sealingly secured to a flexible diaphragm member, of either of two forms, attached to the coke oven door. Another form of knife edge sealing strip is partially slotted from the inner edge outwardly while the U-shaped retainer member is expansively jointed.

Abstract: The specification discloses apparatus and methods for recovery of coal fines and for recycling thereof incidental to a self-contained system for charging preheated coal into coke ovens. The apparatus enables a system for charging preheated coal into coke ovens to meet pollution control regulations. The apparatus comprises four circulating streams of liquid for carrying coal fines in a slurry, namely, the charge main liquor circuit, the excess recycle gas scrubber circuit, the charge line condenser circuit and the charge bin vent condenser circuit. The -28 mesh coal with the liquor from the various circuits goes to a clarifier or thickener. Floating fines from top and settled fines from the bottom of the thickener are pumped via a fines tank to filters from which the solid or coagulated fines are restored to the wet coal feed to the heaters.

Abstract: A coke oven emission control system comprising a traveling hood for the quench car into which hot coke is pushed from the coke oven. The hood is independently supported by wheels traveling on rails and is of a length to cover the entire length of the quench car. The hood is moved by the movement of the quench car to and from a quench station, through beams at opposite ends of the quench car that are selectively raised and lowered into and out of a position for engagement with the hood. The top of the hood is provided with a central elongate hollow neck which projects upwardly into a longitudinally slotted exhaust duct paralleling the battery of ovens. The slot in the duct has a pair of parallel extending flexible sealing strips which are biased toward sealing engagement with each other across the slot and which separate to seal on the neck of the hood as it slides longitudinally along the duct. Selective communication is thus provided for flow of fumes, gas, smoke, particulates, etc.

Abstract: Apparatus and process for removing coal dust from gases evolved from coke ovens while they are being charged comprehends a common duct for both charging gas and coking gas leading to a common gas collecting main, means in the duct for spraying the charging gas with a charging liquor to scrub out solid particles therefrom, means in the duct for spraying the coking gas with flushing liquor, and means for withdrawing liquor and solid particles from that duct.

Abstract: Coke oven gas collecting apparatus includes separate gas and liquor collecting mains for charging gas and coking gas connected to the standpipe through a rotary vane liquor seal valve.

Abstract: Apparatus adapted to reduce emissions from the doors of coke ovens and the like includes a separate fume collecting hood positioned above each oven door, manifolds connected therewith and with a suction fan and gas cleaner, a valve in each hood, a series of nozzles for an aspirating fluid spaced along each oven door jamb, supply pipes therefore and a supply main, valves in the supply pipes, a closed coke guide adapted to be positioned against an oven being pushed, and spring-urged means carried by the end of the coke guide adapted to seal the guide to the oven.