Patent ID: 8863675
Filing Date: 2014-10-21
Classification: F22B,F22G

Abstract:
1. A steam generator for producing superheated steam in a waste incineration plant, the steam generator comprising: a boiler housing having an evaporator housing section and a wall-superheater housing section, said boiler housing including a first vertical flue and a second flue for flue gas, said second flue connected flow-wise to said first vertical flue, for conducting a flow of the flue gas in an upwards direction in said first flue and in a downwards direction in said second flue; said wall-superheater housing section being spatially separated from said evaporator housing section, movable relative to said evaporator housing section and disposed downstream of said evaporator housing section in a flow direction of flue gas from an incineration process, said wall-superheater housing section having a shape of an outwardly closed hood upwardly gas-tightly closing off said first flue and said second flue and deflecting the flue gas discharging from said first flue into said second flue; a combustion chamber disposed in said first flue of said boiler housing and having walls with an evaporator, said evaporator having tubes exposed to a throughflow of water and acted upon by heat energy released during incineration of waste for producing superheated steam, said tubes exposed to a throughflow of water being disposed in said evaporator housing section; and a wall superheater for increasing temperature of the superheated steam, said wall superheater including a plurality of tubes exposed to a throughflow of the superheated steam and plate-shaped elements formed of a corrosion-proof material for protecting said tubes exposed to a throughflow of the superheated steam against the flue gas, said tubes exposed to a throughflow of the superheated steam being disposed in said wall-superheater housing section.