Heat accumulating type burner for heating furnace

Abstract

The invention discloses a heat accumulating type burner for a heating furnace. The heat accumulating type burner comprises a burner block part, an air inlet unit, a thermal storage tank, a first flange arranged between the burner block part and the furnace wall, second flanges arranged on the two sides of the air inlet unit and a third flange arranged between the air inlet unit and an air pipeline, wherein the air inlet unit is arranged between the burner block part and the thermal storage tank; the burner block part comprises a burner block prepared from high temperature resistant and flushing resistant mullite castabale, and a metal shell part; during production, the two parts are poured to form an integral body; an air channel and a coal gas channel are combined on the separate burner block; the structure of the burner is the same as that of the conventional burner, namely, the inner ring is a coal gas nozzle, and the outer ring is an air nozzle, so that combustion is effectively implemented. According to the invention, the heat accumulating type burner is high in combustion efficiency, changeable and good in temperature uniformity, and solves a plurality of defects of the conventional heat accumulating type burner; the product quality is improved; the enterprise cost is reduced; the working condition of workers is improved.

Description

technical field [0001] The invention belongs to the technical field of heating equipment, and relates to a heating furnace, in particular to a regenerative burner used in the heating furnace. Background technique [0002] Blast furnace gas is a by-product produced in the ironmaking process of iron and steel plants. The content of combustible components in blast furnace gas is only ~30%, and its calorific value is low. When it is used directly, it cannot reach the temperature required for heating billets. It can only be used with some high calorific value gas. Furnace gas is mixed and used, and the utilization rate is low. In iron and steel enterprises, a large amount of blast furnace gas is discharged into the atmosphere through direct ignition, which not only wastes a lot of energy, but also seriously pollutes the environment. [0003] In the 1980s, regenerative combustion technology began to appear, which can store heat from blast furnace gas to 1000°C, so as to achieve th...

AI Technical Summary

Problems solved by technology

In view of the limitations of on-site construction, it can only be designed as a relatively simple burner brick nozzle type. Even so, the nozzle size is difficult to meet the design requirements during construction. A fatal shortcoming of this kind of burner is that after the burner brick is damaged , cannot be repaired and replaced

Air and gas are sprayed into the furnace for diffuse combustion, no flame shape to speak of, and low combustion efficiency

[0005] In addition, another disadvantage of the traditional regenerative burner is that the life of the burner is low and maintenance is difficult

Since the burner shell and the furnace wall steel plate are directly welded together, the local high temperature of the furnace wall will cause cracking of the weld seam, which will easily cause high-temperature flue gas overflow and fire leakage. The welding part must be cut during maintenance, which will not only damage the furnace wall steel plate , and the maintenance takes a long time and is difficult, which is one of the reasons why regenerative heating furnaces are often criticized

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