Multi-stage combustion energy-saving environment-friendly burner

Abstract

The invention discloses a multi-stage combustion energy-saving environment-friendly burner, and belongs to the technical field of energy conservation and environmental protection. The burner comprises a burner overhaul cover plate, a combustion air inlet, a heat accumulator, a heat insulation material, a fire-resistant pouring material, a large-hole baffle brick, a high-temperature gas distribution chamber, a natural gas sprayer, a primary air spinning disk, an anchoring nail, a primary air inlet, a first connecting flange, a natural gas inlet, a grille plate, a second connecting flange, a bolt connector and a burner installation positioning plate, the burner overhaul cover plate is fixed on a low-temperature gas distribution chamber through the second connecting flange and the bolt connector, a steel pipe of the combustion air inlet is welded on the low-temperature gas distribution chamber, and the heat accumulator is mounted in a heat accumulation burner box. According to the burner, the advantages of air classifying combustion technique are sufficiently played, NOx generation is effectively restrained by the aid of oxygen-deficient combustion mechanism, and the discharge amount of pollutants such as nitrogen oxide is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, and more specifically relates to a multi-stage combustion energy saving and environmental protection burner. Background technique [0002] At present, most of the natural gas single regenerative burners used in industrial furnaces in China use natural gas pipes located in the center of the regenerative burner, or on the upper (lower) part of the air regenerative burner, or on the left side of the air regenerative burner ( Right) Insert natural gas nozzle. [0003] In the former form, the natural gas nozzle is completely located in the high temperature area. Although the material of the natural gas nozzle can be improved or the high temperature resistant non-metallic material can be used to make the natural gas nozzle, the actual use is that the natural gas pipe is extremely easy to burn and needs to be replaced regularly. Affects production, high cost, and this...

AI Technical Summary

Problems solved by technology

[0003] In the former form, the natural gas nozzle is completely located in the high temperature area. Although the material of the natural gas nozzle can be improved or the high temperature resistant non-metallic material can be used to make the natural gas nozzle, the actual use is that the natural gas pipe is extremely easy to burn and needs to be replaced regularly. Affects production, high cost, and this form is a casing structure in which air wraps gas. The gas is sprayed out from the central steel pipe, and the combustion air is sprayed into the furnace through the peripheral casing. The two are mixed and burned inside the furnace. A cylindrical or trumpet-shaped rotary flame is formed. The interior of the flame is a reducing atmosphere dominated by fuel, and the exterior is an oxidizing atmosphere dominated by combustion products such as air, carbon dioxide, and water vapor.

On the one hand, the billet is always surrounded by the oxidizing atmosphere during the heating process, resulting in serious oxidation and burning of the billet; on the other hand, the horizontal spread of the rotary flame is relatively short, resulting in the concentration of the high temperature zone in a small area , the vertical projection area on the heated billet is small and the radiation angle coefficient is low, which not only affects the heating effect of the billet, but also easily forms a local high temperature zone, and the existence of the local high temperature zone provides a source for the generation of thermal nitrogen oxides. Without convenient conditions, the content of nitrogen oxides in the combustion products is relatively high, which is very easy to cause environmental pollution

[0004] In the latter two forms, although the natural gas nozzle is no longer in the high-temperature zone, the natural gas and high-temperature combustion-supporting air enter the furnace through their respective nozzles before being mixed and combusted. Due to the huge difference in the volume ratio of natural gas and high-temperature air, the working conditions The lower volume ratio is about 1:50, which can easily lead to poor mixing of natural gas and combustion-supporting air, incomplete combustion, black smoke, high fuel consumption, and incompletely burned natural gas being sucked into the air heat storage tank during the reversing process , the secondary combustion in the heat storage tank has potential safety hazards, and causes damage to the heat storage body, affecting normal production and high production costs

[0005] Regardless of the above forms, during the reversing combustion process, the natural gas nozzle is prone to carbon formation and coking at the nozzle position under the high temperature radiation of the furnace gas, which will eventually cause the natural gas nozzle to be burned and blocked, affecting the use of the burner.

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