Flue gas cooling and cleaning system
AssigneeALSTOM Technology Ltd
InventorsGeir Wedde, Ole K. Bockman
Life of this patent
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Abstract
An improved flue gas cooler 10, or bank of coolers 10, handles flue gas G from aluminum reduction cells in an aluminum smelter plant. Each flue gas cooler 10 has a gas inlet chamber 14, a gas outlet chamber 16, and a matrix of gas cooling tubes 18 extending between the inlet chamber and the outlet chamber. Each cooling tube 18 has a bell-shaped inlet end 19 comprising an aerodynamically curved gas-accelerating profile effective to facilitate streamlined flow of flue gas G into the tube. The improved flue gas cooler makes it possible to connect the flue gas cooler to receive flue gas G direct from the aluminum reduction cells without getting clogged by dust and sublimates present in the flue gas.
Claims11
A gas cooler constructed to handle hot, raw flue gas from aluminum reduction cells in an aluminum smelter plant, comprising:
- (a) a gas inlet chamber;
- (b) a gas outlet chamber;
- and
- (c) a matrix of spaced-apart, mutually parallel gas cooling tubes, each cooling tube having an inlet end projecting into the inlet chamber and an outlet end projecting into the outlet chamber, the inlet ends being bell-shaped and comprising an aerodynamically curved gas-accelerating profile effective to facilitate streamlined flow of hot raw flue gas into the cooling tubes, the projecting inlet ends being in one piece with the cooling tubes.
A gas cooler configured to receive hot, raw flue gas discharged from aluminum reduction cells in an aluminum smelter plant, comprising:
- a gas inlet chamber;
- a gas outlet chamber;
- a plurality of spaced apart, parallel gas cooling tubes, each gas cooling tube including a first axial end, a second axial end and an inner circumferential surface extending along an entire length of the gas cooling tube, the first axial end of the gas cooling tube extending through a wall bounding the gas inlet chamber and protruding into the gas inlet chamber, the second axial end of the gas cooling tube extending through a wall bounding the gas outlet chamber and protruding into the gas outlet chamber, the first axial end of the gas cooling tube being bell-shaped so that a portion of the inner circumferential surface of the first axial end of the gas cooling tube curves outwardly, the projecting inlet ends being in one piece with the cooling tubes.
Dependencies are inferred from the claim text.