BLAST FURNACE SLAG GRANULATION AND WASTE HEAT RECOVERY AND UTILIZATION DEVICE AND METHOD

摘要

Disclosed are a blast furnace slag granulation and waste heat recovery and utilization device and method, the device comprising an aerosol granulation nozzle assembly, a deflector (7), a cyclone separator (8) and a waste heat recovery device. The aerosol granulation nozzle assembly comprises a slag flow controller (2), a compressed air flow control valve (3), a water volume control valve (4) and an aerosol spray gun (5). Mixed heat exchange between medium temperature gas and high temperature granular slag (6) and the solidification of the high temperature granular slag are achieved in the deflector, and the medium and high temperature gas and high temperature granular slag after heat exchange are introduced into the cyclone separator. The cyclone separator completes the separation of the medium and high temperature gas and high temperature granular slag, and transports the medium and high temperature gas and the high temperature granular slag to the waste heat recovery device. The present invention completes the granulation of blast furnace slag, and organically couples slag sensible heat recovery with sludge drying, high-temperature steam preparation, power generation and low-temperature hot water preparation, thereby recovering the waste heat of medium temperature gas and high temperature particles in the process of slag granulation and improving the efficiency of waste heat recovery and utilization.