Device for realizing waste heat recovery by directly calcining lime through primary high-temperature flue gas of converter

Abstract

The invention provides a device for realizing waste heat recovery by directly calcining lime through primary high-temperature flue gas of converters. The device comprises converters. The converters are connected with gasification cooling flues. Gas inlet pipes are connected with flue gas distribution pipes. A feed inlet is arranged at the tops of lime kiln shells. Annular flue gas collection pipes are installed at the upper parts of the outer walls of the lime kiln shells. Guide blocks are arranged in the internal centers of the lime kiln shells. The circumferences of the guide blocks are connected with the lime kiln shells through air supply pipes and air collection pipes. A plurality of through holes are horizontally arranged on the side walls of the air supply pipes and the air collection pipes. The air supply pipes are communicated with the flue gas distribution pipes. The air collection pipes are communicated with the flue gas collection pipes. The flue gas collection pipes are connected with purification pipes. Gravitational dust collectors, a bag-type dust collector and a draft fan are installed on the purification pipes. The device for realizing waste heat recovery by directly calcining lime through primary high-temperature flue gas of converters has the advantages that the waste heat of the high-temperature flue gas of the converters can be used to calcine the lime, the purification and the recovery of the primary high-temperature flue gas of the converters are realized, a water treatment system is not required to be arranged, the operating cost of equipment is greatly reduced and no environmental pollution is caused.

Description

technical field [0001] The invention relates to a converter flue gas waste heat recovery device, in particular to a converter high-temperature flue gas directly calcining lime to realize the waste heat recovery device. Background technique [0002] At present, there are two ways to purify and recover the primary flue gas of the converter. One is the wet purification recovery system, which adopts saturated cooling. The high-temperature flue gas passes through the "two papers and one tower", and the temperature is cooled from 800-1000 ℃ at the outlet of the vaporization cooling flue to about 70 ℃, and then enters the primary fan room The other is the dry purification recovery system, which uses evaporative cooling. The high-temperature flue gas passes through the evaporative cooler, electrostatic precipitator, and gas cooler, and the temperature is cooled from 800-1000 °C at the outlet of the vaporization cooling flue to After about 70°C, the switching station chooses recove...

AI Technical Summary

Problems solved by technology

In the above two methods, the heat of the converter flue gas from 800°C to about 70°C is absorbed by water through saturation or evaporative cooling and further directly cooled. Treatment system, equipment operation cost is high, and cause pollution to the environment

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