Methods for determining the extrusion period of a coke oven, methods for estimating the time required for dry distillation, methods for estimating the amount of plastic that can be loaded, and methods for coke manufacturing.

Abstract

A method for determining the extrusion period in a coke oven is provided, which can directly and accurately determine the extrusion period during the pyrolysis of plastics in a coke oven without dust generation. One embodiment of the method for determining the extrusion period is a method for determining the extrusion period of a pyrolyzed product, wherein the pyrolyzed product is the product from the pyrolysis of plastics in a carbonization chamber of a coke oven without coal loading. The method involves: controlling the internal pressure of the carbonization chamber to a predetermined positive pressure value or higher while measuring the methane concentration in the exhaust gas from the carbonization chamber; in controlling the internal pressure, either blocking the airflow between the carbonization chamber and the main pyrolysis pipe branching from the riser pipe connected to the carbonization chamber, or setting the internal pressure of the carbonization chamber to a higher pressure than the pressure of the main pyrolysis pipe; and determining the extrusion start time as a point later than the point when the methane concentration decreases to a predetermined methane concentration threshold, which is equivalent to a predetermined extrusion grace time.

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