Steam-Generator Furnace

Abstract

The invention relates to furnace devices for powerful power-generating units and can be used for the heat and electric-power industry. The inventive steam-generator furnace comprises a vertical annular combustion chamber, which is formed by external and internal tubular screens, embodied in the form of concentrically arranged equilateral prisms. Burners and secondary air nozzles are placed in the bottom part of the furnace on the external screen faces tangentially to a conventional circle. Said burners and nozzles are movably arranged on the same plane and unidirectionally oriented in such a way that it makes it possible to adjust the conventional circle diameter. Additional secondary air nozzles are mounted in the top part of the furnace on the faces of the external and internal screens oppositely with respect to the burners.

1 . A steam generator furnace with a vertical annular combustion chamber consisting of external and internal tubular screens that are designed as concentrically mounted, equilateral prisms, wherein the lower portion of the screen face incorporates burners situated tangentially to a conditional periphery, and secondary air nozzles, characterized in that the burners are movably mounted with the capability of regulating the diameter of the conditional periphery, and the secondary air nozzles are arranged over the furnace height in two tiers. 
   
   
       2 . The steam generator furnace according to  claim 1 , characterized in that the range of regulation for the conditional periphery measures 0.4-0.7 D, where D is the diameter of the periphery entered in the cross section of the prism of the external screen. 
   
   
       3 . The steam generator furnace according to  claim 1 , characterized in that the first tier of secondary air nozzles is located at the burner level on the faces of the external screen. 
   
   
       4 . The steam generator furnace according to  claim 3 , characterized in that the nozzles are directed in line with the burners. 
   
   
       5 . The steam generator furnace according to  claim 1 , characterized in that the second tier of secondary air nozzles is situated in the upper portion of the furnace on the faces of the external and internal screens. 
   
   
       6 . The steam generator furnace according to  claim 5 , characterized in that the nozzles run counter to the burners.