Bergwerksverband Gmbh

Didier Engineering Gmbh

Kurt-Gunther Beck

Wolfgang Rohde

Werner Siebert

Diethard Habermehl

Heinrich Echterhoff

Gerd Nashan

Dieter Stalherm

Werner Kucharzyk

Horst Schumacher

Volker Kolitz

Wolfgang Simonis

Kurt Hedden

Glowing coke descending through a cooling duct in a coking plant is quenched by two gas flows respectively traversing an upper compartment and a lower compartment of the duct, the two compartments meeting at a restricted gate for the passage of the coke. At least the lower gas flow, passing in countercurrent to the descending coke charge, is also circulated through a drying and preheating oven for coal to be fed to a coke-oven battery of the plant, thus containing some water vapor. When the upper flow is also constituted by coal-drying gas, it is passed downward through the upper compartment in order to reduce the height of a high-temperature zone in which combustion and thus loss of coke could occur. The coke gate is formed by a funnel-shaped upper partition and an upwardly pointing conical lower partition between which a scavenger gas passes in cross-flow.

Process and system for the dry quenching of coke

To increase the temperature at which a tar separator operates which separates tar from condensate obtained by cooling coking gas produced by coking preheated coal, the condensate is preheated by heat exchange with the coking gas entering a raw gas cooler and is then admitted into the coking gas collecting main of the coking ovens, from which it passes to the tar separator. A method and an apparatus are disclosed.

Method and apparatus for tar recovery from raw coking gas

Coal to be supplied to a coking oven is pre-heated, in a single pre-heating zone, such as in a conveying riser, first by heat yielded to it by a gaseous carrier medium entraining the coal for joint passage through the riser, and then additionally pre-heated by heat yielded to it by a gaseous fluid, such as hot combustion products, introduced into the pre-heating zone at a region thereof at which the temperature of the coal has already risen to a predetermined value, such as 80.degree. to 100.degree. C. The additional pre-heating of the coal results in a final temperature of the latter at the exit of the riser of more than 130.degree. C, preferably between 150.degree. and 250.degree. C. The stream of the carrier medium with the coal entrained therein flows upwardly through the riser which is substantially vertical, the coal being entrained at the lower end and separated from the mixture of the carrier medium with the gaseous fluid at the upper end of the riser. A part of the above-mentioned mixture may be circulated to the lower end of the riser for use as the carrier medium. The flow-through cross-sectional area of the pre-heating zone may be larger downstream than upstream of the region at which the gaseous fluid is introduced for maintaining the speed of flow through the pre-heating zone constant despite the addition of the gaseous fluid.

Method of and an arrangement for pre-heating coking coal

In a coking process wherein coal is subjected to coking in chamber furnaces by means of combustion of a fuel gas in the heat flues of the furnace and transfer of the generated heat through the walls of the furnace, the heat supply is effected, during the entire course of the coking operation, according to a preestablished programmed control scheme related to a uniform or mean rate of heat supply, the supply of heat being at a maximum at the commencement of the coking operation and being gradually reduced during the continuing coking operation.

Coking method and arrangement

A cokable substance such as coal is admitted into a coking chamber. A quantity of heat which is sufficient to cause coking of the cokable substance is supplied to the chamber during preselected time intervals within the coking period in which coking of the cokable substance progresses in response to the supply of heat. On the other hand, during other time intervals within the coking period in which coking of the cokable substance is essentially unaffected by the supply of heat, the quantity of heat supplied to the chamber is reduced to a level below that required to sustain coking of the cokable substance during the preselected time intervals. In this manner, savings in energy may be realized. The supply of heat to the chamber during those time intervals in which coking of the cokable substance is unaffected by the supply of heat may be discontinued completely.

Method of operating coke ovens

A method for inhibiting dust formation while feeding coal into a coking chamber, comprising preheating coal and subsequently contacting the coal with an aqueous solution of 30-70% by weight of waste sulfite liquor in amounts of about 0.5 to 1.0 parts by weight of said solution per 1000 parts by weight of said coal.

Method of restricting the formation of dust when feeding coal into coke

Improvements in the process of producing coke from bituminous coal in high-efficiency coking ovens, whereby the size of the lumps of coke and their strength are both increased, which comprises maintaining a coking rate between 1.2 and 2.8, and preferably between 1.44 and 2.0, inches per hour, based upon the width in inches of the coking chamber and the time required to complete the coking operation, and maintaining a rate of temperature increase between 1.6 and 3.3 centigrade degrees per minute during the heating of the coal while it is in the plastic range. The coal preferably is also preliminarily heated to a temperature between 160.degree. and 250.degree.C, preferably between 180.degree. and 200.degree.C, before being charged to the high-efficiency coking oven, and the width of the coking chamber of the high-efficiency oven that is used is at least 500 millimeters (19.7 inches).

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Essen, Germany

Kurt-Gunther Beck