The present invention discloses a wet continuous
slag discharge and conveying
system for a gasifier, comprising a high-pressure
slag tank, a variable-pressure
slag tank and a low-pressure slag tank. A slag receiving
pipe is vertically arranged on the top of the high-pressure slag tank, the lower end of the slag receiving
pipe penetrates the slag receiving port of the high-pressure slag tank and is placed in the high-pressure slag tank, and a plurality of spray heads are circumferentially arranged at the bottom end of the slag receiving
pipe; a low-pressure slag valve is arranged on the slag outlet of the low-pressure slag tank; the variable-pressure slag tank is also connected to the low-pressure slag tank through a variable-pressure straight-
discharge pipe, and a variable-pressure straight-
discharge valve is arranged on the variable-pressure straight-discharge pipe. The present invention is a wet continuous slag discharge and conveying
system for a gasifier, the slag discharge
system has a low temperature, small environmental
pollution, various process pipelines of the slag discharge system are not easy to be blocked, the slag discharge system is stable, and the four processes of frequent pressure relief, discharge,
stamping and material connection of traditional dry slag discharge and wet slag discharge are avoided, the valve does not need to be frequently opened and closed, and the
system failure rate is reduced.