CONTROLLING METHOD FOR RECOVERING OF CONVERTER WASTE GAS

摘要

PURPOSE:To suppress the combustion of converter waste gases as far as possible and to recover the waste gases of high calorific value stably in the stage of recovering the waste gases by the use of noncombustion type treating installations for waste gases by controlling the pressure in the furnace port in accordance with the patterns of the concn. of the gaseous Co in the waste gases to be set in association with the materials to be blown. CONSTITUTION:A hood 3 is mounted between the port 1a and flue 2 of a converter 1, and further a skirt 4 is provided between the hood 3 and the converter 1. The skirt 4 is used to shut off the intrusion of air through the port 1a into the converter 1 and the flue 2 by closing the port 1a. Now, the measured value of the pressure in the furnace port measured with a pressure gage P0 mounted to the upper hood 3a constituting the hood 3 is converted to an electric signal with a transmitter 5 for the pressure in the furnace port. Said signal is transmitted to a control device 100 for recovering of waste gases. The measured value of the concn. of the gaseous CO in the waste gases meausred with a gas analyzer Q1 provided on the converter 1 side in the position where a primary dust collector 2b of the flue 2 is installed is converted to an electric signal with a transmitter 8 for the concn. of the gaseous CO. Said signal is transmitted to the device 100. The pressure in the furnace port of the cascade is set in a control circuit for the pressure in the furnace port in accordance with the feedback signal from the transmitter 8.