Biomass boiler slag treatment system and process

摘要

Disclosed are a biomass boiler slag treatment system and a process therefor. The biomass boiler slag treatment system comprises: a slag trough (1) a slag transport apparatus (2) and a re burning apparatus (5). The re burning apparatus (5) is sealedly provided between the slag trough (1) and the slag transport apparatus (2) and is able to move horizontally. The re burning apparatus (5) is controlled to be closed and then slag falls down the slag trough (1) onto the re burning apparatus (5) achieving the re burning of carbon in the slag with the heat produced by the combustion of carbon in the slag being returned to the hearth. The re burning apparatus (5) is controlled to be opened and then slag falls onto the slag transport apparatus (2) and is discharged. The biomass boiler slag treatment process comprises: closing the re burning apparatus (5) vibrating slag by means of a grate (9) to fall onto the re burning apparatus (5) stopping vibrating the grate (9) and re burning carbon in the slag on the re burning apparatus (5) and then returning the heat produced to the hearth; opening the re burning apparatus (5) such that the slag falls onto the slag transport apparatus (2) and is discharged; and repeating the above mentioned steps to achieve re burning of carbon in the slag and recovery of heat. By re burning incompletely burnt carbon in the slag through the re burning apparatus (5) slag heat recovery is achieved and boiler efficiency is improved.