METHOD AND APPARATUS OF MEASURING THE RATES AT WHICH GASES ARE BLOWN INTO A ROTARY KILN

摘要

A method of measuring the rate at which gases are blown in streams into a rotary kiln, said method comprising the steps of: introducing said gases into said kiln in respective streams; intercepting each of said streams with a constriction before the stream enters said kiln; pneumatically tapping each stream behind the respective constriction to generate a differential pressure between the pressure of each stream upstream of the respective constriction and a static second gas presssure, said differential pressures representing the flow rate of the respective streams into said kiln; transducing each differential pressure into respective electrical signals on said rotary kiln whereby each signal represents the flow rate of the respective streams; and tapping said electrical signals from said rotary kiln by slip rings on said kiln and stationary tape engaging said slip rings. And an apparatus to carry out this method.