MODULARIZED NATURAL CONVECTION BOILER SYSTEM FOR RECOVERING WASTE HEAT OF LIQUID SLAG

摘要

Disclosed is a modularized natural convection boiler system for recovering waste heat of liquid slag. A granulating bin, a mobile bed and a hot air duct of each operation module are each provided with a water-cooling heating surface; and generated steam is gathered into a shared boiler steam drum, enters the hot air duct and the granulating bin in each operation module separately for reheating after being subjected to steam-water separation, and finally is formed into superheated steam for subsequent use. After entering each operation module, air sequentially passes through the mobile bed and the granulating bin to form hot air, the hot air enters a water-cooling hot air duct and then is subjected to full heat exchange therein, and cooled air is finally gathered on a shared main flue, and is discharged from a chimney after passing through a dust remover and an induced draft fan. The present invention can be flexibly combined according to different processing amounts and different field areas; multiple modules can be used and prepared, and the reliability of the system is thus improved; heat exchange units are compactly arranged, the heat exchange efficiency is improved by means of countercurrent heat exchange, and the loss of available energy is reduced; and the steam drum is used in the system, so that natural convection is realized, and the consumption of a water pump is reduced.