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 dry distillation of plastics in a coke oven without dust generation. In one embodiment, the method for determining the extrusion period is provided in a coke oven carbonization chamber where plastics are loaded after coal and the coal and plastics are dry distilled. 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 dry distillation main 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 dry distillation main 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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