SENSIBLE HEAT RECOVERING SYSTEM OF MOLTEN SLAG IN BLAST FURNACE

摘要

PURPOSE: A sensible heat recovering system of molten slag in blast furnace is provided to effectively recover sensible heat and waste heat of high temperature molten slag that are emitted without recovery and reduce environmental problems compared with a conventional granulation facility. CONSTITUTION: The sensible heat recovering system of molten slag in blast furnace comprises a blast furnace molten slag atomization apparatus (A) for atomizing molten slag injected after being generated from the blast furnace in the high temperature state; a pipeline(109) which is constructed in a way that heat is transferred to a heat exchanger(108) connected to the pipeline(109) as the fallen particulate is being naturally transferred along the inclined lower surface after particulate of slag is fallen down; a direct heat exchange unit(111) into which the particulate of slag fallen down the lower part of the pipeline(109) is flown to be direct contact heat exchanged with air blown from the lower part to the upper part; a particle separator(113) for emitting the air introduced from the direct heat exchange unit(111) to the upper side and separation discharging the particulate after transferring heat to a heat exchanger(114) by dropping the particulate to the lower side; a heat exchange chamber(118) for releasing the air after transferring heat to a heat exchanger(119) inside the heat exchange chamber(118) from high temperature air introduced from the particle separator(113); a blower(116) for circulating the air released from the heat exchange chamber(118) to the direct heat exchange unit(111); and an electricity generating cycle system (B) for continuously generating electricity by circulating the operating fluid again after generating electricity by receiving operating fluid of high temperature and high pressure from the heat exchangers(114,108) and the heat exchanger(119).