Single air regenerative burner for roller hearth furnace

Abstract

The invention discloses a single air regenerative burner for a roller hearth furnace, which belongs to the technical field of regenerative heating furnace equipment and is used for heating plate blanks. According to the technical scheme, air and smoke are subjected to heat storage and heat discharge in an upper box body, a coal gas spray gun is mounted in a lower box body, the central line of the coal gas spray gun coincides with that of a burner brick, and an air spraying hole and a coal gas spraying hole are formed in the burner brick. When the single air regenerative burner is used, coal gas and the air are sprayed out to form a concentric jet-flow state and are premixed and burnt in the burner brick. The best combustion effect of the regenerative burner can be ensured, the purpose of quickly heating steel billets can be achieved, the requirements for the tapping temperature and temperature difference of the plate blanks in a steel rolling process can be met, and the characteristics of high efficiency and energy conservation of a regenerative combustion technology are fully reflected. Meanwhile, the combustion temperature of the coal gas can be effectively reduced, and the highest combustion temperature of a hearth can be controlled to be less than 1280 DEG C, so that the generation of NOx can be effectively reduced; the environment cannot be polluted; the regenerative burner has remarkable social benefits.

Description

technical field [0001] The invention relates to an air single heat storage burner used in a heat storage type roller bottom heating furnace on a thin slab continuous casting and rolling production line, and belongs to the technical field of heat storage type heating furnace equipment. Background technique [0002] The thin slab continuous casting and rolling production line is a compact hot-rolled wide-band steel production line. After the continuous casting and pouring is completed, the slab directly enters the roller hearth furnace. , the continuous casting slab is mainly subjected to supplementary heating and temperature equalization process in the roller hearth furnace. When the slab temperature reaches 1150°C and the temperature difference is ≤10°C, it can meet the technical requirements of steel rolling. At the same time, the roller hearth furnace is also used for continuous casting and rolling mill Different production processes provide buffer time, that is, when the ...

AI Technical Summary

Problems solved by technology

However, the gas and air of this air-only regenerative burner adopt an external mixed combustion method, that is, after the gas and air are ejected from their respective nozzles, they are mixed and burned inside the furnace. The flame of the burner is longer, and the unburned The gas is easily drawn away by the opposite burner, and secondary combustion occurs in the smoke exhaust burner, resulting in low combustion efficiency and poor combustion effect of the regenerative burner. The low heat storage temperature of the air will also reduce the combustion efficiency of the heating furnace. At the same time, due to the existence of secondary combustion, the life of the honeycomb body in the regenerative burner is short and the operating cost is high.

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