Method for heating a high temperature winkler gasifier

Abstract

A method for heating a high-temperature Winkler gasifier during the start-up of the gasifier includes the use of at least one burner for heating purposes. A gasifier head of the Winkler gasifier is assigned a cyclone with a return conduit for returning the particles separated off in the cyclone into the fluidized bed in the lower region of the gasifier, by means of which method the heating of a high-temperature Winkler gasifier is simplified and made substantially independent of the structural size of the gasifier. The at least one burner, which is installed in the head region of the gasifier and which acts downward into the interior of the gasifier, allows gas flow to be generated in the reverse direction through the return conduit of the cyclone.

1 .- 10 . (canceled) 
     
     
         11 . A method for heating a high-temperature Winkler gasifier during the start-up of the gasifier, the gasifier comprising:
 a gasifier head having a cyclone with a return conduit for returning particles separated off in the cyclone into a fluidized bed in a lower region of the gasifier; and   at least one burner in the head region of the gasifier;   
       wherein:
 the at least one burner acts downward into the interior of the gasifier; and 
 a gas flow is generated in the reverse direction through the return conduit of the cyclone for heating the gasifier. 
 
     
     
         12 . The method of  claim 11 , wherein the burner is operated stoichiometrically or substoichiometrically. 
     
     
         13 . The method of  claim 12 , wherein, during substoichiometric operation of the burner, combustion air required in the lower region of the gasifier is additionally injected through different nozzle planes. 
     
     
         14 . The method of  claim 11 , wherein a flap located in a feed conduit from the gasifier to the cyclone is operated in temperature-regulated fashion to rotate between an open position and a closed position. 
     
     
         15 . The method of  claim 11 , wherein, when the required start temperature of the gasifier is reached, the at least one burner provided in the head of the gasifier is retracted into a region of relatively low particle concentration. 
     
     
         16 . The method of  claim 11 , wherein the at least one burner is supplied with coolant for preventing the formation of particle melt phases. 
     
     
         17 . A high-temperature Winkler gasifier having:
 a cyclone assigned to a head of the gasifier; and   a solids return conduit from the cyclone into a lower region of the gasifier;   wherein:
 at least one burner is provided in the gasifier head; and 
 the burner is configured to act into the interior of the gasifier. 
   
     
     
         18 . The high-temperature Winkler gasifier of  claim 17 , wherein a shut-off flap is provided in a conduit between the gasifier head and the cyclone. 
     
     
         19 . The high-temperature Winkler gasifier of  claim 17 , wherein the at least one burner is axially movable. 
     
     
         20 . The high-temperature Winkler gasifier of  claim 17 , wherein coolant is conducted through the burner for preventing the formation of particle melt phases.