I-shaped self-preheating burner with grading function

Abstract

The invention discloses an I-shaped self-preheating burner with a grading function. The I-shaped self-preheating burner with the grading function is characterized in that a heat exchange cylinder sleeves an inner pipe; spray holes are distributed at the head end of the heat exchange cylinder; the tail end of the heat exchange cylinder is opened; the head end of the inner pipe is hermetically connected to the inner side of the head end of the heat exchange cylinder; the tail end of the inner pipe is closed; a grading ring slidably sleeves the inner pipe; the head end of the grading ring is located in an annular space between the tail end of the heat exchange cylinder and the inner pipe; an operating component at the tail end of the grading ring hermetically extends out of a shell; a combustion chamber is located in the head end of the inner pipe and hermetically penetrates out of the heat exchange cylinder; a central pipe hermetically penetrates into the inner pipe and extends to the head end of the combustion chamber; a grading pipe sleeves the central pipe; the head end of the grading pipe extends into the combustion chamber; the tail end of the grading pipe is hermetically mounted on the shell; an ignition electrode hermetically penetrates through the shell and extends into the inner pipe to enter the combustion chamber; a coal gas inlet, an air inlet and a smoke outlet are formed in the shell; the coal gas inlet communicates to an annular space between the tail end of the grading pipe and the central pipe; and a communication hole is formed in the side face near the tailend of the inner pipe. According to the burner, grading combustion in a high-temperature mode and a low-temperature mode is achieved, and NOx generation is reduced.

Description

technical field [0001] The invention relates to a burner, in particular to an I-type self-preheating burner with a grading function. Background technique [0002] The flame sprayed out by type I self-preheating burner is direct flame sub-high velocity flame. Compared with ordinary direct flame burner, it has the advantages of good flame stability, good rigidity, high flame speed, strong turbulence, and fast workpiece heating. In the iron and steel metallurgy industry, the burner is arranged on the side of the annealing furnace, trolley furnace, normalization furnace and heat treatment furnace with conventional combustion methods. The power range of this type of burner is large, generally in the range of 20-200kw, and it can be heated by open flame and radiant tube indirect heating technology. [0003] As the requirements for environmental protection become more and more stringent, the existing I-type self-preheating burners can no longer meet the requirements of environment...

AI Technical Summary

Problems solved by technology

[0003] As the requirements for environmental protection become more and more stringent, the existing I-type self-preheating burners can no longer meet the requirements of environmental protection for NOx emissions, especially the space in the I-type radiant tube is limited, and it is more technically difficult to reduce NOx emissions

Images