BigPatents India

The present invention discloses a method of gasification burner online feeding for a coal-water slurry gasifier, wherein the pressure of the water-coal slurry is 0.05- 2.5MPa higher than the gasifier’s operating pressure, and the pressure of oxidizer is 0.05-4MPa higher than the gasifier’s operating pressure, by setting up the feed flows of coal-water slurry and oxidizer respectively. The coal-water slurry line and the oxidizer line between the cut-off valves and the gasification burners are both protected by shield gas. Upon determining that the pressure and flow parameters are normal, the gasification burners perform online pressurized feeding: closing the coal- water slurry circulating valve, opening the cut-off valve, closing the shield gas cut-off valve, and the coal-water slurry entering into the gasifier; closing the oxidizer vent valve, opening the cut-off valve, closing the shield gas cut-off valve, and the oxidizer entering into the gasifier. The operating load of the gasification burner is regulated to be normal. The present invention can realize online, pressurized and continuous feeding of the gasification burners which are fixed after they stalled for other reasons than their own, thus greatly reducing the probability of accidental shutdown of gasifiers and improving the reliability of long-term service of the multi-nozzle opposed gasifier. No. of Pages : 14 No. of Claims : 4