High capacity burner

Abstract

The invention comprises a burner comprising a burner head and supply openings for a fuel and an oxygen containing gas, a central tubular passage for the oxygen containing gas and a radially outward positioned passage for the fuel. The passage for fuel is fluidly connected to one or more fuel discharge openings at the burner head wherein the fuel discharge openings are directed inwardly such that in use, the fuel is injected into the stream of oxygen containing gas. The central passage is provided with an obstruction located between the supply opening for oxygen containing gas and the fuel discharge openings. The invention is also directed to a process using said burner.

1 . A burner comprising a burner head and supply openings for a fuel and an oxygen containing gas, a central tubular passage for the oxygen containing gas and a radially outward positioned passage for the fuel, wherein the passage for the fuel is fluidly connected to one or more fuel discharge openings at the burner head and wherein the fuel discharge openings are directed inwardly such that in use, the fuel is injected into the stream of oxygen containing gas and wherein the central passage is provided with an obstruction located in the flow path for oxygen and wherein at least part of the fuel discharge openings are located such that, in use, fuel is discharged in a stagnant zone as present at the downstream end of the obstruction. 
     
     
         2 . A burner according to  claim 1 , wherein the obstruction is a swirl imparting means located between the supply opening for oxygen containing gas and the fuel discharge openings, which swirl imparting means provide, in use, a swirling motion to the oxygen containing gas at the burner head. 
     
     
         3 . A burner comprising a burner head and supply openings for a fuel and an oxygen containing gas, a central tubular passage for the oxygen containing gas and a radially outward positioned passage for the fuel, wherein the passage for fuel is fluidly connected to one or more fuel discharge openings at the burner head and wherein the fuel discharge openings are directed inwardly such that in use the fuel is injected into the stream of oxygen containing gas and wherein the central passage is provided with swirl imparting means located between the supply opening for oxygen containing gas and the fuel discharge openings, which swirl imparting means provide, in use, a swirling motion to the oxygen containing gas at the burner head, wherein at least part of the fuel discharge openings are located such that in use, fuel is discharged in a stagnant zone as present at the downstream end of the swirl means. 
     
     
         4 . A combined tubular apparatus comprising a burner according to  claim 1 , an ignition burner and a flame detector. 
     
     
         5 . A process to operate a burner by injecting a fuel into a stream of an oxygen containing gas in a stagnant zone as present downstream from an obstruction present in the stream of oxygen located at a burner head of the burner. 
     
     
         6 . A process according to  claim 5 , wherein the velocity of the oxygen containing stream is between 100 and 350 m/s. 
     
     
         7 . A process to start-up a pressurized gasification reactor, which reactor is comprised of a vessel, an outlet conduit for product gas, which conduit is provided with a valve, a start-up burner and a burner for performing the gasification reaction, by
 (i) performing the process according to  claim 5  making use of the start-up burner and simultaneously increasing the pressure in the vessel by throttling the valve, and   (ii) starting the gasification burner once the pressure and the temperature in the vessel has reached a target pressure level by introducing a solid carbonaceous feed and an oxygen containing gas to the burner while performing the process according to  claim 5 .   
     
     
         8 . A process according to  claim 7 , wherein the target pressure level is above 10 bar and wherein the target temperature level is above 1200° C. 
     
     
         9 . A process according to  claim 7 , wherein after step (ii) is performed the pressure is increased to the desired operating pressure in the range of from 30 to 80 bars.