OPERATION METHOD OF BURNING FURNACE IN CEMENT CLINKER BURNING APPARATUS

摘要

PURPOSE:To enable the continuous stable operation of a burning furnace by controlling the volume of forced air to primary and secondary cooling device in accordance with the measured grain diameters of granulated material discharged from a jet stream fluidized bed granulating furnace. CONSTITUTION:The granulated material discharged from a granulating furnace 3 is sampled and a grain dicmeater is measured by a grain size measuring instrument 13, and the measured signal is inputted to an arithmetic processor 14. For example, in the case a desired grain diameter is 2.5+ or -0.5mm, when the grain size is=2.0mm, the agglomeration temp. of burning furnace 6 is calculated from the measured grain diameter and the superficial velocity U0 of burning furnace 6 calculated from the layer temp. T2 of the burning furnace 6 and a Roots blower 12. When the temp. is lower than a burning temp. +alpha, the air flow of Roots blower 12 is increased, in accordance with this, the fuel to the burning furnace 6 is increased so that the burning temp. may become constant. The superficial velocity U0 and Umf of a fluidized bed cooler 7 is calculated, and when U0KXUmf and the temp. of fluidized bed cooler 7 is =1100 deg.C, the air flow of a Roots blower 11 is reduced. And the fuel guantity to granulating furnace 3 is controlled so that the temp. of the granulating furnace 3 may become constant.