CONTROL METHOD OF CALORIC VALUE OF COCKS OVEN

摘要

PURPOSE: A method for controlling the caloric value of a cocks oven is provided, to allow the caloric value supplied to each carbonization room to be controlled according to the amount of water when cocks is prepared by using the coals with different water content. CONSTITUTION: The method comprises the steps of measuring the water content of coal; determining if there is the change of water content by delivering the measured water content to a process computer; and injecting the coal of the amount corresponding to the caloric value calculated by the process computer according to the mathematical formula 1 when there is no change of water content, and injecting the coal of the amount corresponding to the caloric value calculated by the process computer according to the mathematical formula 2 when there is the change of water content. The mathematical formula 1 is represented by supply caloric value(kcal) = weight of coal(kg) x water content of coal x £specific heat of water(kcal/kg deg.C) x (b.p. of water(deg.C) - room temperature(deg.C)) + evaporation latent heat of water(kcal/kg) + specific heat of steam(kcal/kg deg.C) x (dry distillation termination temperature of coal(deg.C) - b.p. of water(deg.C))| + weight of coal(kg) x (1 - water content of coal) x specific heat of coal(kcal/kg deg.C) x(dry distillation termination temperature of coal(deg.C) - room temperature(deg.C)). The mathematical formula 2 is represented by supply caloric value (kcal) = {water content of coal x £specific heat of water(kcal/kg deg.C) x (b.p. of water(deg.C) - room temperature(deg.C)) + evaporation latent heat of water(kcal/kg) + specific heat of steam(kcal/kg deg.C) x (dry distillation termination temperature of coal(deg.C) - b.p. of water(deg.C))| + weight of coal(kg) x (1 - changed water content of coal) x specific heat of coal(kcal/kg deg.C) x(dry distillation termination temperature of coal(deg.C) - room temperature(deg.C))}.