Patent ID: 6145453
Filing Date: 2000-11-14
Classification: F23G,F23N

Abstract:
A method for controlling the firing rate of combustion installations, in particular refuse combustion installations, comprising the steps of:depositing combustible material at the beginning of a fire grate;subjecting the combustible material on said fire grate to a stoking and forward motion; andremoving resulting slag at an end of the fire grate,the stoking and forward motion of the combustible material being at least influenced as a function of a permeability to combustion air of fire grate and firebed,a control signal corresponding to the permeability to combustion air is determined by recording a free air outlet area of a total combustion air resistance body, composed of grate surface structure and firebed, in accordance with an equation ##EQU7## where R is the control siinal, PLB is a primary airflow througth the firebed under operating conditions and V is a flow velocity in the combustion air resistance body, composed of the grate surface structure and the firebed, and which is calculated from an equation ##EQU8## where g is the gravitational acceleration, .gamma..sub.L is a specific weight of the air under the operating conditions and .DELTA.p is a static pressure difference between an undergrate zone and a furnace space.