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A process for conditioning flue gases in waste material incineration plants with heat utilization. Secondary air is introduced into the combustion chamber above the combustion grate. The flue gases are moistened prior to entering the gas cleaner by water sprayed therein. Apparatus for performing the

A process for conditioning flue gases in waste material incineration plants with heat utilization. Secondary air is introduced into the combustion chamber above the combustion grate. The flue gases are moistened prior to entering the gas cleaner by water sprayed therein. Apparatus for performing the process is also disclosed.

대표청구항 ▼

A process for conditioning flue gases in waste material incineration plants with heat utilization having a combustion chamber with a combustion grate, sidewalls and a reflection wall, a flue gas cooler serving as the heat utilizer and a gas cleaner connected in series with said combustion chamber, s

A process for conditioning flue gases in waste material incineration plants with heat utilization having a combustion chamber with a combustion grate, sidewalls and a reflection wall, a flue gas cooler serving as the heat utilizer and a gas cleaner connected in series with said combustion chamber, said process comprising the steps of: introducing secondary air into said combustion chamber above the combustion grate and before said flue gas cooler at a plurality of injection points located at the same height through at least one of the two furnace sidewalls and through said reflection wall; and spraying water into said flue gases to moisten them before they enter said flue gas cooler at said plurality of injection points; said water and secondary air being regulatably introduced together into the reduction-oxidation zone of the combustion chamber thereby creating an oxygen excess sufficient for the subsequent burning of unburned combustible volatile material in said flue gases, the CO-oxidation of the unburned material is catalytically accelerated by a homogeneous water gas reaction and simultaneously the laminar flow of the combustible gases is converted into a turbulent flow to facilitate mixing the gases in the combustion chamber, and whereby a predetermined maximum gas temperature is maintained, and a flue gas water content of at least 10 Vol. % is maintained prior to its discharge from the combustion chamber. Apparatus for conditioning flue gases in waste material incineration plants with heat utilization having a combustion chamber with a combustion grate, sidewalls and a reflection wall, a flue gas cooler serving as the heat utilizer connected at the gas discharge of the combustion chamber, and a gas cleaner connected in series with said combustion chamber and said gas cooler, said apparatus comprising: a conduit adapted for connection to a source of secondary air; a conduit adapted for connection to a source of water; at least one first mixing nozzle opening into said combustion chamber from at least one of said side walls; at least one second mixing nozzle opening into said combustion chamber from said reflection wall, said reflection wall overlying the final combustion zone of said combustion grate; and means for connecting both said water and secondary air conduits to said first and second mixing nozzles for injection thereof into said combustion chamber; whereby an oxygen excess sufficient for the subsequent burning of unburned combustible volatile material in said flue gases is provided, the CO-oxidation of the unburned material is catalytically accelerated by a homogeneous water gas reaction, the laminar flow of the combustible gases is converted into a turbulent flow to facilitate mixing the gases in the combustion chamber, a predetermined maximum gas temperature is maintained, and a flue gas water content of at least 10 Vol. % is maintained prior to its discharge from the combustion chamber.