METHOD FOR DETERMINING OPTIMAL COMPOSITION OF COAL CHARGE FOR COKING Russian patent published in 2007 - IPC C10B57/04 G01N33/22 

FIELD: chemical technological processes for producing solid fuel, possibly in coal-tar chemical industry for selecting coal charges for coking.

SUBSTANCE: method for determining optimal composition of stable type coal charge for coking comprises steps of receiving reference charge; calculating and determining optimal composition of charge; preparing charge with optimal content of its components for further coking while performing all investigation processes in industrial coke ovens; taking as reference charge several types of charge with different composition; preliminarily selecting large number of reference basic types and admissible relations of components for each type of charge; according to data of passive or active experiments plotting inlet-outlet model of fluctuations of coking process for each type of charge; adjusting relay- exponential predicting device; effectively measuring coal masses present in silos and towers of coal-tar chemical production; measuring current properties of coal charge components for coking, current parameters of coking mode, type and content of charge of previous day, selected for usage type and components of charge for future operation period of coke batteries. If both types of charge are matched, according to history data for selected type of charge, finding sampled variations of percentage content of each component of charge; ranging found row of variations; in said ranged row selecting stable components of charge with less value of variations among non-stable components with high value of variations in order to provide realization of relation 2 ≥ n_c/n_i≤ 1 where n_c - number of stable components; n_i - number of non-stable components that is to be no less than 2; setting mass values of stable components of charge according to levels of previous operation period of coke ovens; predicting coke quality by means of relay-exponential predicting device; finding deviation of predicted value of coke quality factor from predetermined one; in inlet-outlet mathematical model of coking process with use of regular or irregular searching procedures, optimizing relations of non-stable components in order to provide equality of both values (predicted and predetermined ones); combining found relations of non-stable components with predetermined relations of stable components in order to provide optimal composition of charge.

EFFECT: possibility for obtaining results of optimization of coal charge composition almost equal to parameters of actual production process, improved reliability of accelerated optimizing process, possibility for predicting coke quality.

1 note, 1 tbl, 1 dwg