Solid fired hot gas generator with extended regulating range

Abstract

The invention relates to a solid fired hot gas generator which comprises a plurality of solid burners for extending the regulating range, which form a multiple solid burner with an enlarged regulating range. A solid feed and a combustion air feed are assigned to each solid burner and with the aid of a dosing means a separate, dosed solid feed to each solid burner is guaranteed. The firing power of the multiple solid burner which is in particular a multiple impulse burner extends from the minimum power of one of the solid burners to the maximum power of all solid burners so that a regulation of all necessary load regions of a plant unit to be supplied is covered.

1 . Solid fired hot gas generator with an extended regulating range,
 characterised in that   a plurality of solid burners are arranged in a burner muffle and a multiple solid burner is formed,   an independent solid feed and combustion air feed are assigned to each solid burner and   the firing power of the multiple solid burner can be regulated from the minimum power of a solid burner to the maximum power of all solid burners so that load regions of a subsequent installation unit, to which the hot gas produced in the hot gas generator is fed, are covered.   
     
     
         2 . Hot gas generator according to  claim 1 ,
 with a start burner which is arranged in a burner plate of the burner muffle,   with a feed means for gas to be heated and   with a mixing component arranged after the burner muffle, in which the combustion gas produced is mixed with the gas to be heated,   characterised in that   a plurality of solid burners are arranged coaxially to the start burner and are fixed in the burner plate of the burner muffle.   
     
     
         3 . Hot gas generator according to  claim 1 ,
 characterised in that   solid burners of the same size or different sizes form a multiple solid burner.   
     
     
         4 . Hot gas generator according to  claim 2 ,
 characterised in that   three solid burners are arranged with an equal angular distance from each other and with an equal radial distance from the start burner in the burner plate.   
     
     
         5 . Hot gas generator according to  claim 1 ,
 characterised in that   the solid burners are arranged at a defined angle to the longitudinal axis of the burner muffle.   
     
     
         6 . Hot gas generator according to  claim 1 ,
 characterised in that   a dosing means is provided for a separate, dosed solid feed to each solid burner.   
     
     
         7 . Hot gas generator according  claim 1 ,
 characterised in that   dust-form fuel, in particular coal dust or biomass dust, can be fed in fluidised form to the solid burners.   
     
     
         8 . Hot gas generator according to  claim 1 ,
 characterised in that   impulse burners, in particular for hard coal dust, brown coal dust, petroleum coke dust, biomass dust and dust mixtures, are arranged as solid burners, which respectively comprise a conically extending reaction chamber, possibly with a conically tapering flame accelerating nozzle, and an injection lance with deflection hood for the fluidised, dust-form fuel and a radial blade cascade for supplying combustion air.   
     
     
         9 . Hot gas generator according to  claim 8 ,
 characterised in that   the impulse burners used as solid burners can be switched to gas and operated for example with natural gas, synthesis gas or blast furnace gas.   
     
     
         10 . Hot gas generator according to  claim 1 ,
 characterised in that   a perforated jacket unit (LOMA) with a plurality of cylindrical and coaxial perforated jackets, with annular gaps between the perforated jackets and with an annular channel between the perforated jackets and an outer, closed sheet steel jacket is disposed as a mixing component.   
     
     
         11 . Hot gas generator according to  claim 1 ,
 characterised by   use in coal gasification plants, PCI plants in the steel industry and in non-ferrous metallurgical processes, in the cement industry and in general heat-based installations.