Predecomposition kiln by pass air relief and coal gangue dewatering technology
A technology of precalcining kiln and bypass ventilation, which is applied in the field of coal gangue dehydration process, and can solve the problems of clinker and cement quality decline, alkali-aggregate reaction, and deterioration of calcination conditions, etc.
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[0016] Example 1, such as figure 1 , The exhaust gas discharged from the first-stage cyclone separator 2 directly enters the quenching chamber, sprays water and mixes with cold air, and directly enters the electrostatic precipitator after reducing the temperature. The waste gas from the secondary and tertiary cyclone separators 3 and 4, that is, the coal gangue powder cooling system, has a temperature of about 150°C, and can be directly used for coal gangue grinding and drying.
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[0017] Example 2: Such as figure 2 , The waste gas discharged from the first-stage cyclone separator 2 is introduced into the humidification tower 7 for humidification, and then collected by the electrostatic precipitator 8, and then discharged by the exhaust fan 9 and the chimney 10.
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[0018] Example 3: Such as figure 2 , The waste gas discharged from the first-stage cyclone separator 2 directly enters the 14 to 15-stage cyclone coupling pipe of the decomposition kiln, and then enters the preheater system of the precalciner kiln again.
[0019] The invention can also be used for the hot gas of the precalcining kiln grate cooler, and other hot gases can also be used.
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