Upward-drawing type dense-lean burner

Abstract

The invention provides an upward-drawing type dense-lean burner. A burning sheet fixing plate is provided with a burning sheet set; the burning sheet set is composed of a plurality of single-sheet fire holes; the side face of each single-sheet fire hole is provided with a lean air inlet and a dense air inlet; the lean air inlets are communicated with auxiliary flame holes in the tops of the single-sheet fire holes; the dense gas inlets are communicated with main flame holes in the tops of the single-piece fire holes; the auxiliary flame holes are symmetrically formed in the two sides of the main flame holes; and a fan is arranged above a heat exchanger and used for discharging nitrogen oxides generated by a burner assembly and increasing oxygen for flames of the single-piece fire holes so as to promote combustion. According to the upward-drawing type dense-lean burner in the invention, the air inflow proportion of the lean air inlets and the dense air inlets can be flexibly adjusted according to needs, a filter screen is cleaned, the adjusted air inlet amount is kept stable, the problem that the difference between the adjusted amount and the actual amount is too large due to the fact that the filter screen is blocked by dust is solved, the adjusted amount and the actual amount promote each other, and the using effect is good. The upward-drawing type dense-lean burner is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to an updraft rich-lean burner. Background technique [0002] The principle of the rich-lean burner is to make a part of the fuel burn too richly, and another part of the fuel burn too lightly, but the overall air volume remains unchanged. Since the two parts are burned at a deviation from the stoichiometric ratio, because the NO X This combustion is also known as deviated combustion or non-stoichiometric combustion. [0003] In the prior art, a rich-lean burner with the application number "201811401114.1" includes two outer shells, an inner shell is connected between the two outer shells, and the inner shell is fixedly provided with a first injection channel for introducing gas and air , the inner casing is fixed with the first mixing chamber communicating with the first injection channel, the casing is provided with a main fire hole at the position corresponding to the upper end...

AI Technical Summary

Problems solved by technology

[0004] However, in its use, there are still relatively obvious defects: 1. In the above-mentioned device, the intake air volumes of rich combustion and lean combustion are constant, and the intake ratio of rich and lean combustion cannot be adjusted according to different processing needs. Therefore, The above-mentioned device has poor versatility and is only suitable for the treatment of a single working condition; 2. After a long time of use of the thick-lean burner, the air intake end is easily blocked by dust adhesion, and the dust will even adhere to the thick and light air intake ports On the inner wall of the burner, after a period of use, it is necessary to remove the single-piece burners of the burner one by one and then clean them. The disassembly and installation are cumbersome and inconvenient to use.

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