Method for recycling flue gas waste heat of alumina roasting furnace
A flue gas waste heat and recovery method technology, which is applied in heat exchange equipment, lighting and heating equipment, etc., can solve the problems that the temperature of hot water is not easy to control and affect the recovery effect of waste heat, so as to avoid flue gas temperature fluctuations and achieve good recovery effect Effect
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Embodiment 1
[0027] The recovery process adopts the method of direct heat exchange between water and flue gas, and the temperature of the water for direct heat exchange with the flue gas is 20°C, and the temperature difference between the temperature of the flue gas discharged after the heat exchange is 0.8°C, and the flue gas treatment capacity 1500Nm 3 / h, the inlet flue gas temperature is 156°C, and the water flow rate is 6.1 m 3 / h, the outlet water temperature is 76°C.
Embodiment 2
[0029] The recovery process adopts the method of direct heat exchange between water and flue gas, and the temperature of the water that directly exchanges heat with the flue gas is 21°C, and the temperature difference between the temperature of the flue gas discharged after the heat exchange is 1.0°C, and the flue gas treatment capacity 1505Nm 3 / h, the inlet flue gas temperature is 150°C, and the water flow rate is 6.4 m 3 / h, the outlet water temperature is 77°C.
Embodiment 3
[0031] The recovery process adopts the method of direct heat exchange between water and flue gas, and the temperature of the water for direct heat exchange with the flue gas is 35°C, and the temperature difference between the temperature of the flue gas discharged after the heat exchange is 1.5°C, and the flue gas treatment capacity 1510Nm 3 / h, the inlet flue gas temperature is 160°C, and the water flow rate is 14.5 m 3 / h, the outlet water temperature is 73°C.
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