Carbonization chamber usable period predicting method and carbonization chamber repairing method
AssigneeJef Steel Corporation
InventorsSeitaro AKIYAMA, Yasumasa FUKUSHIMA
Life of this patent
Estimating the term…
Abstract
A carbonization chamber usable period predicting method predicts bulging amount and chamber usable period. The method applies to chambers with oven walls constructed from tongue-and-groove bricks. It includes: measuring oven wall shape to identify bulges from initial hot-state dimensions; performing multiple measurements over time to determine a first regression equation for bulging amounts≤minimum threshold D1 and a second regression equation for bulging amounts≥maximum threshold D2, where D1 and D2 account for brick tolerances and measurement errors; and calculating when bulging will reach a predetermined threshold using the appropriate regression equation to predict usable period.
Claims4
A carbonization chamber usable period predicting method for predicting a usable period of a carbonization chamber of a coke oven, the carbonization chamber having an oven wall constructed by stacking bricks with tongue and groove, the method comprising:
- measuring an oven wall shape of the carbonization chamber with a shape measuring device to identify a bulge bulging inward from an initial position based on hot-state dimensions upon completion of construction of the coke oven;
- measuring the oven wall shape for the bulge multiple times at different measurement dates and times to determine a first regression equation representing a correspondence between time and the amount of bulging within a range where the amount of bulging is less than or equal to D1 calculated by the following equation (1) and a second regression equation representing a correspondence between time and the amount of bulging within a range where the amount of bulging is greater than or equal to D2 calculated by the following equation (2);
- and
- calculating a date and time at which the amount of bulging calculated using the first regression equation or the second regression equation reaches a predetermined threshold to predict a usable period of the carbonization chamber,
- D
- 1
- =
- g
- -
- (
- dR
- 1
- +
- dL
- 1
- )
- ;
- and
- (
- 1
- )
- D
- 2
- =
- g
- +
- (
- dR
- 2
- +
- dL
- 2
- )
- ,
- (
- 2
- )
- where, in the equations (1) and (2), g is a distance (mm) from a side of the brick with tongue and groove to a tongue and groove, dR1 is a negative manufacturing error value (mm) from the side to the tongue and groove, dR2 is a positive manufacturing error value (mm) from the side to the tongue and groove, dL1 is a negative measurement error value (mm) of the shape measuring device, and dL2 is a positive measurement error value (mm) of the shape measuring device.
Dependencies are inferred from the claim text.