Crude gas generated by a gasification furnace of the European
smelting furnace is subjected to coarse dust removal through gravity dust removal, the dust removal ash is discharged to a gravity dust
storage tank on the lower portion through a dust discharging valve, a material level meter of a tank body is remotely observed, a high material level is achieved, the dust discharging valve is closed, and the dust removal ash is discharged to the gravity dust
storage tank through the dust discharging valve. A tank body pressure
display device is remotely observed, a tank body blow-off valve is closed, the
nitrogen pressure of a
nitrogen source is adjusted to 0.8 MPa through a
nitrogen pressure adjusting device, an in-tank
stamping device 10 is started to stamp the interior of the tank to 0.8 MPa, a lower
fluidization ash conveying device is started to adjust nitrogen to 0.6 MPa, the
nitrogen pressure is adjusted to 0.1-0.3 MPa through an ash conveying
pipe and an ash conveying device, and the
nitrogen pressure is adjusted to 0.8 MPa through a
nitrogen pressure adjusting device. And dense phase conveying is started, gravity ash is conveyed to a raw
coal bunker of the
coal injection
system, and ash conveying is stopped after the ash is conveyed to the low material level. And ash conveying nitrogen is connected to the environment dust removal bag box body through a pipeline and is discharged by the environment dust removal bag box body.