Incineration plant for solid material and method for replacing its nozzle insert

Abstract

An incineration plant for solid material, such as waste or biomass, includes a combustion material inlet through which the solid material is to be introduced, a combustion chamber into which the solid material is introduced and in which the solid material is combusted, whereby flue gases are produced, a combustion grate with which the solid material and combusted solid material can be conveyed through the combustion chamber, a primary air supply below the top of the combustion grate, and at least one nozzle arranged above the combustion grate with which a gaseous medium such as secondary air, tertiary air, and/or an oxygen poor carrier gas can be provided, the at least one nozzle having a gas inlet and a gas outlet.

1 . An incineration plant for solid material, the incineration plant comprising:
 a combustion material inlet through which solid material can be introduced;   a combustion chamber into which the solid material is introduced and in which the solid material is combusted;   a combustion grate configured to convey the solid material and combusted solid material through the combustion chamber;   a primary air supply below the top of the combustion grate; and   at least one nozzle arranged above the combustion grate and configured to provide a gaseous medium, the at least one nozzle having a gas inlet embodied by a nozzle pipe and a gas outlet embodied by an outlet insert;   wherein the outlet insert is at least partly inserted in the nozzle pipe and is connected to the nozzle pipe by a welded joint arranged on the outside of the nozzle pipe.   
     
     
         2 . The incineration plant according to  claim 1 , wherein the welded joint is accessible from the combustion chamber. 
     
     
         3 . The incineration plant according to  claim 1 ,
 wherein the outlet insert has a flange which abuts against an end face of the nozzle pipe, and   wherein the welded joint is provided between the flange and an outer circumference of the end face of the nozzle pipe.   
     
     
         4 . The incineration plant according to  claim 1 ,
 wherein the nozzle pipe is arranged in a wall delimiting the combustion chamber,   wherein the nozzle pipe protrudes into the combustion chamber, and   wherein the welded joint is arranged on a section of the nozzle pipe that extends into the combustion chamber.   
     
     
         5 . The incineration plant according to  claim 1 , wherein the welded joint is embodied by at least one of a continuous welding seam, multiple welding beads, and multiple welding points. 
     
     
         6 . The incineration plant according to  claim 1 , wherein the outlet insert comprises at least one of a multiple outlet part, a deflecting part, and a swirling part. 
     
     
         7 . The incineration plant according to  claim 1 , further comprising:
 an empty pass downstream of the combustion chamber;   a heat recovery steam generator downstream of the empty pass;   a flue gas purification device downstream of the heat recovery steam generator.   
     
     
         8 . A method for replacing a used outlet insert of a nozzle in an incineration plant, the method comprising:
 destroying a welded joint between the used outlet insert of the nozzle and a nozzle pipe, the welded joint arranged on the outside of the nozzle pipe;   removing the used outlet insert from the nozzle pipe;   inserting a new outlet insert into the nozzle pipe; and   welding the new outlet insert to the nozzle pipe.