Firma Carl Still Gmbh & Co Kg

Rheinische Braunkohlenwerke Ag

Firma Carl Still

Rheinische Braunkohlwerke Ag

Roman Kurtz

Horst Dungs

Kurt Lorenz

Heinrich Weber

Hans-Joachim Kersting

Hans B Koenigs

Peter Speich

Abrasion-proof coke forms are produced from bituminous coal, brown coal, or peat in the form of briquets, by preheating the briquets, dehydrating or predrying them, carbonizing them and then cooling them in at least three separate stages in which the briquets are dehydrated indirectly by subjecting them to indirect temperature conditions, producing a temperature gradient in the briquets. The briquets are automatically fed into a shaft tower which includes an upper drying shaft portion made up of a plurality of stacked radiators which include tube elements for the passing of a heating fluid, such as steam, therethrough and which define vertical shaft passages through which the briquet forms are passed downwardly and into a carbonizing shaft which has separate gas channels for directing heating gases therethrough and to a heating flue and which subsequently includes a lower cooling zone through which the briquets pass and then into a discharge channel where they are delivered for classification.

Apparatus for producing abrasion-proof coke forms from bituminous coal,

A method of producing abrasion resistant coke from brown coal briquets in a shaft furnace comprises charging the coke briquets into the top of the furnace and removing coke from the bottom of the furnace while directing inert hot combustion gases into the furnace and through the briquets at a plurality of vertically spaced levels throughout the height of the shaft furnace. Gases are directed at temperatures to effect and successively lower stages of the furnace the preheating, predrying, carbonization, and cooling of the charge. In accordance with a feature of the invention, gases are collected in each of the preheating and predrying stages by the use of a tubular suction arm which extends substantially across the width of the furnace and includes a performated bottom and sidewalls which extend partly below the bottom and are provided with a saw-tooth configuration so as to withdraw the gases through the space below the bottom and through the perforations of the bottom and to effect entrainment of dust from the charge in so doing. The shaft furnace construction for carrying out the method includes means for circulating the hot gases into each of the stages and the closed tubular suction arm which extends substantially across the whole width of the furnace in each of the preheating and predrying stages includes a bottom perforated wall and side walls which extend downwardly beyond the bottom and arranged so as to draw off a percentage of the gases from the associated stage and in so doing prevent the outflow dust along with the gases. The construction is such that about 10% of the gases is evacuated below the perforated bottom and then up through the bottom and withdrawn through the suction arm.

Apparatus for producing abrasion resistant coke from brown coal briquets

Method of producing abrasion-proof coke forms from bituminous coal,

A method of producing abrasion resistant coke from brown coal briquets in a shaft furnace comprises charging the coke briquets into the top of the furnace and removing coke from the bottom of the furnace while directing inert hot combustion gases into the furnace and through the briquets at a plurality of vertically spaced levels throughout the height of the shaft furnace. Gases are directed at temperatures to effect and successively lower stages of the furnace the preheating, predrying, carbonization, and cooling of the charge. Gases are collected in each of the preheating and predrying stages by the use of a tubular suction arm which extends substantially across the width of the furnace and includes a performated bottom and sidewalls which extend partly below the bottom and are provided with a saw-tooth configuration so as to withdraw the gases through the space below the bottom and through the perforations of the bottom and to effect entrainment of dust from the charge in so doing. The shaft furnace includes means for circulating the hot gases into each of the stages. Hot inert combustion gases are introduced into the circulating gases to avoid condensation of liquids.

Method and apparatus for producing abrasion resistant coke from brown

The coke forms are produced in four stages, each constituted by a respective oven chamber, and in which the briquets are, respectively, preheated, dehydrated or dried, carbonized and cooled. Hot gas circuits are provided, in which the hot gas is composed substantially of burnt lean gas of the carbonization, and, for each stage, the hot gases are recirculated in a separate respective circuit. In the preheating, dehydrating and carbonization stages, the hot gases are heated and produced, or supplemented, in a respective separate combustion chamber with the recirculating hot gas in the carbonization stage being supplemented with cooled lean gas from this stage. The recirculating hot gases are dedusted separately in a dust settling chamber in which their flow velocity is reduced to approximately 0.2 to 2.0 m/sec, with the dust being collected. Steam may be added to the recirculating hot gas of the preheating stage, drying stage, or both, and the pressure in the hot gas circuits is maintained at a level slightly higher than atmospheric pressure. The oven chambers are arranged as a vertical oven block plant and the oven chambers are interconnected with each other by transition zones which are conically narrowed to approximately one half of the cross section of the chamber and then widened up to the full cross section. The hot gas inlets are provided in the transition zones at the lower ends of the oven chambers, and the hot gas outlets are provided in the transition zones at the upper ends of the chambers. The dust settling chambers are provided immediately adjacent the hot gas outlets, and the carbonization chamber is surrounded by its combustion chamber to form an operating unit.

Apparatus for producing non-abrasive coke forms from brown-coal briquets

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Frechen, Germany

Roman Kurtz