Slag discharge system, gasification furnace equipped with the same, and operation method of slag discharge system

摘要

The slag cooling water W is stored at the bottom of the gasification furnace (2), and the slag hopper (5) that receives the slag (S), and the slag (S) and the slag cooling water (W) from the bottom of the slag hopper (5) A slag suction port (7p) and a slag cooling water feed line (7A) that suck out the slag and send it to the slag separator (10), a circulation pump (20) that forms a water flow that sucks out the slag (S), and a slag separator (10 ) And a slag cooling water circulation line (7B) connected to the slag hopper (5), and a reverse flow line (7R) for causing the slag cooling water (W) discharged from the circulation pump (20) to flow back to the slag cooling water supply line (7A). A selective supply unit (DA) for selectively supplying the slag cooling water (W) discharged from the circulation pump (20) to the slag cooling water circulation line (7B) and the backflow line (7R); Comprising the grayed cooling water supply line (7A) and a water supply line having one end connected (23), the.