Regenerative burners for heating furnaces

Abstract

The invention discloses a regenerative burner for a heating furnace, comprising a burner brick part, an air inlet unit, a heat storage box, a first flange arranged between the burner brick part and the furnace wall, and a The second flanges on both sides of the air inlet unit are arranged on the third flange between the air inlet unit and the air duct; the air inlet unit is arranged between the burner brick part and the heat storage tank; the burner brick part includes Burner brick and metal shell part made of high temperature and erosion-resistant mullite castable; the two parts are cast together during production, and the air and gas passages are combined on a separate burner brick with the same structure. Like conventional burners, the inner ring is a gas nozzle and the outer ring is an air nozzle, which effectively organizes combustion. The regenerative burner of the invention has high combustion efficiency, can be replaced, and has good temperature uniformity, solves many disadvantages of the traditional regenerative burner, improves product quality, reduces enterprise costs, and improves working conditions of workers.

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 for the heating furnace. Background technique [0002] Blast furnace gas is a by-product produced in the ironmaking process of steel plants. The content of combustible components in blast furnace gas is only -30%. It has a low calorific value. When used directly, it cannot reach the temperature required for heating billets. It can only be combined with some high-calorific value gas such as coke. The mixed use of furnace gas has low utilization rate. In iron and steel enterprises, a large amount of blast furnace gas is discharged into the atmosphere by 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 blast furnace gas to 1000°C, thereby achieving the purpose of using blast furnace g...

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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