Uhde Gmbh

Thyssenkrupp Uhde Gmbh

Tyssenkrupp Uhde Gmbh

Thyssen Krupp Ag

Thyssenkrupp Industrial Solutions Ag

Frank Krebber

Ronald Kim

Helmut Dobert

Ralf Schumacher

Ulrich Kochanski

Friedrich Huhn

Joerg Brix

Helmut Schulte

Kerstin Ueberschaer

Manfred Stier

Kerstin Überschär

Sebastian Bialek

Jörg Brix

The invention relates to a method for reducing nitrogen oxides from the exhaust gas of a coke oven, which has a plurality of coking chambers and heating walls, arranged between the coking chambers, with heating flues (') for the indirect heating of the coking chambers. A combustible gas (), which consists entirely or partially of coke oven gas, is burned in the heating flues (&#x2032;), thereby producing an exhaust gas which contains nitrogen oxides. A reducing agent is fed to the exhaust gas at a temperature between 700&#xb0; C. and 1100&#xb0; C. and the proportion of nitrogen oxide in the exhaust gas is reduced by a homogeneous gas reaction between the reducing agent and the nitrogen oxides. The exhaust gas is subsequently passed through a regenerator () for heat recovery. Furthermore, carbon deposits on hot parts of the combustible gas feed are burned with decarbonizing air, wherein, during a regenerator half-period in which the combustible gas feed to one heating flue (&#x2032;) is stopped, the decarbonizing air is introduced into this heating flue (&#x2032;) through the associated burner supply line and combustible gas nozzle (&#x2032;) and is discharged from another heating flue () with the hot exhaust gas. According to the invention, metered amounts of the reducing agent are fed into the decarbonizing air and, together with it, brought into contact with the hot exhaust gas.

Method of reducing nitrogen oxides from coke-oven flue gas

A device for compensating deviations from a coaxial arrangement of components of a regulating organ, said regulating arrangement being comprised of a regulating organ, a crown pipe, and an immersion cup which serve for controlling the gas pressure of a coke oven chamber, with the regulating arrangement being comprised of an immersion cup with a water immersion that seals the gas space of a coke oven chamber versus the gas collecting main and/or plant units downstream, and wherein the height of the water level of the water immersion represents a regulating means to control the gas pressure, and wherein said regulating arrangement is furthermore comprised of an immersion pipe that configures a specially shaped crown pipe at its end submerging into the water of the immersion cup, and that is comprised of a regulating organ to regulate the water level.

Device for compensating deviations from a coaxial arrangement of components of a regulating organ to control the gas pressure of a coke oven chamber

A method is provided for operating a coke oven battery including many identical coking chambers, a raw gas receiver, and throttle devices arranged in the receiver for individually controlling the gas pressure in the chambers. Each throttle device includes an immersion bucket acted upon by water. Gas lines terminating in immersion pipes in the immersion buckets connect the chambers with the receiver. Throttle devices are employed that include an overflow that can be vertically adjusted by an actuating drive for controlling the liquid level in the immersion bucket. For a coking chamber to which a pressure control device is allotted, the setting signals for the actuating drive allocated to the time pressure curve in the process of carbonizing coal to coke are recorded as a position-time curve. The actuating drives of throttle devices that are allocated to coking chambers without pressure control devices are controlled according to the position-time curve.

Method for operating a coke-oven battery

A device for controlling the gas pressure in a coke oven chamber, has an immersion cup, to which water is supplied, and with an immersion pipe which is connected to the gas space of the coke oven chamber and terminates in the, immersion cup. The immersion cup has an overflow and a closeable outflow. To control the liquid level, an outflow pipe for water is provided, the inflow-side end of which projects into the immersion pipe and contains casing-side inflow orifices for the inflow of water. Within the outflow pipe is arranged a slide which is open on both end faces and which closes the inflow orifices of the outflow pipe in the longitudinal direction according to the position of said slide and forms a vertically adjustable overflow for the water flowing into the outflow pipe. The inflow-side end of the outflow pipe is surrounded by a siphon pipe which closes the outflow pipe on the top side and which forms an annular duct for the inflow of water, this annular duct issuing into the immersion cup below the immersion pipe.

Device for controlling the gas pressure in a coke oven chamber

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Essen, Germany

Frank Krebber