Partially premixed gas fuel burner of bi-layer porous foamed ceramic plate

Abstract

The invention discloses a partially premixed gas fuel burner of a bi-layer porous foamed ceramic plate. The partially premixed gas fuel burner comprises a shell, a macroporous foamed ceramic plate, a microporous foamed ceramic plate, a top air distributor and a bottom air distributor, wherein the shell comprises a cooling cavity in an annular structure and a shell base-plate arranged on the cooling cavity, the cooling cavity is provided with a cooling cavity used for providing secondary air to pass through, and the bottom of the cooling cavity is provided with a secondary air inlet communicated with the cooling cavity; the inner side wall of the cooling cavity is provided with a secondary air outlet communicated with the cooling cavity, an annular frame formed by the cooling cavity is sequentially provided with the macroporous foamed ceramic plate, the microporous foamed ceramic plate and the top air distributor from top to bottom; the bottom air distributor and a shell base-plate, the secondary air outlet is located between the microporous foamed ceramic plate and the top air distributor, and the shell base-plate is provided with a mixed gas inlet for providing mixed gas of fuel and air to enter. According to the burner provided by the invention, the heating efficiency can be improved, and the heating uniformity can be improved.

Description

technical field [0001] The invention relates to the technical field of burner structures, in particular to a partially premixed gas fuel burner with double-layer porous foam ceramic plates. Background technique [0002] At present, the combustion of gaseous fuels in my country's industrial production is mainly space combustion characterized by free flames. This combustion method requires a large space, and the temperature gradient around the flame is large, which is prone to local high temperatures. The existence of local high temperature areas has caused a large number of NOx is generated, the combustion is incomplete, the thermal efficiency is low, and the combustion stability is poor. Due to the high toxicity of NOx, it is also very important to reduce its emission. For example, for silicon steel, galvanized and other coated products, the dry quality of the surface coating is directly related to the surface quality of the product, and the surface quality of the strip stee...

AI Technical Summary

Problems solved by technology

The traditional strip steel drying furnace uses high-speed burners and flat-flame burners to meet the process requirements. Due to the limitation of the working principle of high-speed burners and flat-flame burners, it is easy to cause local high temperature during the working process, which makes the surface of the strip steel heated unevenly. , so as to affect the drying or sintering quality of the coating, and this kind of combustion has obvious flames, which will cause quality defects on the surface of the strip. At the same time, this kind of combustion method has high pollutant emissions and low heating efficiency

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