Abstract:
The present technology is generally directed to horizontal heat recovery and non-heat recovery coke ovens having monolith crowns. In some embodiments, an HHR coke oven includes a monolith crown that spans the width of the oven between opposing oven sidewalls. The monolith expands upon heating and contracts upon cooling as a single structure. In further embodiments, the crown comprises a thermally-volume-stable material. The crown may be an oven crown, an upcommer arch, a downcommer arch, a J-piece, a single sole flue arch or multiple sole flue arches, a downcommer cleanout, curvilinear corner sections, and/or combined portions of any of the above sections. In some embodiments, the crown is formed at least in part with a thermally-volume-stable material. In further embodiments, the crown is formed as a monolith (or several monolith segments) spanning between supports such as oven sidewalls. In various embodiments, the monolith and thermally-volume-stable features can be used in combination or alone. These designs can allow the oven to be turned down below traditionally feasible temperatures while maintaining the structural integrity of the crown.
Abstract:
The present technology is generally directed to systems and methods of controlling or reducing the output rate of a coke oven through gas sharing providing an extended process cycle. In some embodiments, a method of gas sharing between coke ovens to decrease a coke production rate includes operating a plurality of coke ovens to produce coke and heated exhaust gases. In some embodiments, a first coke oven is offset in operation cycle from a second coke oven. The method further includes directing the heated exhaust gases from the first coke oven to the second coke oven while the second coke oven is mid-cycle. The heat transfer allows the second coke oven to extend its cycle while staying above a critical operating temperature. By extending the operational cycle while generally maintaining output per cycle, overall production is decreased.
Abstract:
A volatile matter sharing system includes a first stamp-charged coke oven, a second stamp-charged coke oven, a tunnel fluidly connecting the first stamp-charged coke oven to the second stamp-charged coke oven, and a control valve positioned in the tunnel for controlling fluid flow between the first stamp-charged coke oven and the second stamp-charged coke oven.
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Abdeckung von und Dosierung von primärer Verbrennungsluft, die durch eine Luftzuführung in den primären Verbrennungsraum eine Koksofenkammer strömt und diese Vorrichtung beispielsweise als umgedrehter Becher, als nach unten offener Hohlkegel oder als massiver Kegel geartet ist, und diese Vorrichtung manuell oder automatisiert in die Vorrichtung zur Luftzuführung ein- oder aufgelassen wird, so dass die Vorrichtung zur Dosierung und Abdeckung die Luftzuführung in einer Stufenzahl von zwei bis unendlich schließt. Durch die Vorrichtung kann die Belüftung eines Kokskammerofens mit Primärluft so gesteuert werden, dass die Primärluft genau dosiert und je nach Aufstellungsort genau verteilt in den Primärheizraum einer Koksofenkammer eingelassen wird.
Abstract:
Die Erfindung betrifft ein Verfahren zum zyklischen Betrieb einer Koksofeneinrichtung, wobei diese aus einer geraden Anzahl aus Koksofenbänken besteht, die wiederum eine gerade Anzahl von Koksofenkammem enthalten. Den Koksofenbänken sind Boilereinrichtungen nachgeschaltet, die mit den heißen Abgasen aus den Koksofenbänken Turbinen antreiben. Auf diese Weise wird Energie gewonnen. Die Koksofenkammem werden in einem genau festgelegten Zyklus ausgedrückt und befüllt, so dass die Produktion von heißem Abgas über das zeitliche Mittel vergleichmäßigt werden kann.
Abstract:
Die Erfindung betrifft einen Koksofen in horizontaler Bauweise (Non-/Heat Recovery Typ), mindestens eine Verkokungskammer, seitlich hierzu angeordnete vertikale Abgaskanäle ("Down-Comer") sowie horizontal und unterhalb der Verkokungskammer angeordnete Bodenkanäle zur indirekten Erwärmung der Verkokungskammer umfasst, wobei mindestens ein Teil der Innenwände der Verkokungskammer als sekundäre Heizfläche ausgebildet sind, indem diese mit einer Hochemissionsbeschichtung (HEB) beschichtet sind, wobei der Emissionsgrad dieser Hochemissionsbeschichtung gleich oder größer als 0,9 ist. Diese HEB besteht bevorzugt aus den Stoffen Cr 2 O 3 oder Fe 2 O 3 oder aus einer diese Stoffe enthaltenen Mischung, wobei der Anteil an Fe 2 O 3 in einer Mischung mindestens 25 Gew.-% und der Anteil von Cr 2 O 3 in einer Mischung mindestens 20 Gew.-% beträgt.
Abstract:
Verfahren zur Verkokung von Kohle, insbesondere solche mit hohem oder wechselndem Flüchtigengehalt in Verkokungsanlagen mit Verkokungskammern nach dem Non-Recovery-Verfahren oder dem Heat-Recovery-Verfahren, ferner eine Vorrichtung, mit der dieses Verfahren auf sehr einfache Weise betrieben werden kann, indem die Überhitzung des Koksofens durch die Einspeisung von Wasserdampf verhindert wird. Das vorgestellte Verfahren ist dabei unabhängig von der Anzahl der zum Einsatz kommenden Verkokungsöfen, sofern sie eine Batterie bilden.
Abstract:
This invention comprises a complete arrangement of ovens, underflues, cooling air ducts under the oven, the feeder flue, to control dampers in the feeder flues, the common flues, the charge car operating over the ovens the ram car operating on one side of the ovens and the hot coke car operating on the other side of the ovens, the oven doors, the door opening/closing mechanism, the coal bin tower with the weighbridge, the quench tower and the feed of the flue gases to boilers of the power plant. The oven is a specially designed structure made of various qualities and shapes of refractory bricks designed to withstand the high temperatures. The combustion is controlled by allowing air in and the hot waste gases are led to a common flue refractory lined inside to withstand the high temperature. The waste gases are led to the boiler for producing steam and electric power in a turbine/generator for energy recovery or alternatively led to an oven stack of sufficient height to maintain a draft in the oven to sustain the coking process.
Abstract:
The present invention relates to a process for the preparation of coke from coal in a coke oven, to a coke oven and to the use of this coke oven to prepare coke from coal. The process for the preparation of coke from coal in a heat recovery coke oven comprises at least the following steps: (A) Providing coal (1) in the at least one primary chamber of the coke oven, (B) At least partial combustion of gas released from the coal in the at least one primary chamber by introducing air through the at least one moiety for providing air (4) to the at least one primary chamber, and carbonization of the coal to obtain coke at a temperature T1, (C) Combustion of the remaining gas released from the coal in the secondary chamber (6) at a temperature T2, wherein this remaining gas has been guided to the at least one secondary chamber (6) through the connection (5) between the at least one primary chamber (2) and the at least one secondary chamber (6), by introducing air through the at least one moiety for providing air (8) to the at least one secondary chamber and (D) Removing the off-gas obtained from steps (B) and (C) through the at least one collector (9), wherein temperature T2 is measured in predefined time intervals during steps (B), (C) and (D) and the at least one moiety for providing air (60) to the at least one secondary chamber is adjusted depending on a comparison of T2 with a value SP2 calculated from T2 of the foregoing time interval, wherein the first value SP2 is predefined at the beginning of step (B). According to a preferred embodiment of the process according to the present invention, SP2 is calculated according to the following method: The first value of SP2 is set by the operator. After certain a certain time interval, for example 20 minutes, temperature T2 is measured and the central processing unit calculates if the difference of SP2 and T2 (SP2 - T2) has increased or decreased during the time interval. For example, if SP2 - T2 has increased more than 2°C, SP2 is recalculated and the new SP2 is the old SP2 + 5 to 14 °C. Further, if SP2 - T2 has decreased more than 1 to 5 °C, SP2 is recalculated and the new SP2 is the old SP2 - 10 to 25 °C.
Abstract:
The present technology is generally directed to methods of increasing coal processing rates for coke ovens. In various embodiments, the present technology is applied to methods of coking relatively small coal charges over relatively short time periods, resulting in an increase in coal processing rate. In some embodiments, a coal charging system includes a charging head having opposing wings that extend outwardly and forwardly from the charging head, leaving an open pathway through which coal may be directed toward side edges of the coal bed. In other embodiments, an extrusion plate is positioned on a rearward face of the charging head and oriented to engage and compress coal as the coal is charged along a length of the coking oven. In other embodiments, a false door system includes a false door that is vertically oriented to maximize an amount of coal being charged into the oven.