Control method for reducing gas consumption under long coking time of coke oven

Abstract

The invention discloses a control method for reducing gas consumption under long coking time of a coke oven, which belongs to the technical field of coke oven energy conservation, and is characterized in that temperature control and gas saving operation is started 4 hours before coke pushing of a carbonization chamber needing temperature control, and the heat supply amount of the carbonization chamber is reduced; the method at least comprises the following steps: S1, reducing the gas supply rate of a combustion chamber corresponding to a carbonization chamber to half of the initial state, reducing the gas supply rate of an adjacent combustion chamber to 1 / 3 of the initial state, and keeping for 2 hours; s2, recovering the coal gas supply rate of the corresponding combustion chamber of the carbonization chamber to the initial state, recovering the coal gas supply rate of the adjacent combustion chamber to the initial state, and heating for 2 hours; and S3, carrying out coke discharging operation on the carbonization chamber until the operation of one furnace number is completed. On the premise of not influencing the coke quality, the method can effectively reduce the coal gas consumption at the coking last stage of the coke oven, and is remarkable in energy-saving benefit.

Description

technical field [0001] The invention belongs to the technical field of coke oven energy saving, and in particular relates to a control method for reducing gas consumption under long coking time of coke ovens. Background technique [0002] When the coking time of large coke ovens is longer than 22 hours, it is in the low-load production state, which is called the production under the state of prolonging the coking time. The coke oven is basically in a stuffy state during the long coking time. In the hours before the coke is pushed, the coke cake is fully mature and basically absorbs no heat or absorbs very little heat. At this time, continuing to supply heat will waste a lot of gas and is easy Cause coke overfire phenomenon. Therefore, how to safely and effectively reduce gas consumption and save energy under the long coking time of coke ovens is a key concern of coke oven production practitioners. Contents of the invention [0003] The invention provides a control method...

AI Technical Summary

Problems solved by technology

The coke oven is basically in a stuffy state during the long coking time. In the hours before the coke is pushed, the coke cake is fully mature and basically absorbs no heat or absorbs very little heat. At this time, continuing to supply heat will waste a lot of gas and is easy cause coke overfire

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