Heating furnace pulse control system and method

Abstract

The invention provides a heating furnace pulse control system and method and belongs to the technical field of metallurgy. The upper section of the system conducts heat supply through flat flame burners, and the lower section of the system conducts heat supply through NOx burners. The three burners are arranged at the south end of the lower section, and the three burners are arranged at the northend of the lower section. The heating furnace pulse control system integrates the double-cross amplitude limit technology and the pulse control technology. Every two crossed burners of the six burnersof the lower section serve as a group, and the three groups of the burners work in sequence. According to the heating furnace pulse control system, the pulse combustion technology is adopted; as allthe burners work under high-load conditions, extrusive flames are long, and the thermal radiation capacity is high; thus, steel blanks can be heated uniformly, and the burners can be protected againstbackfire; moreover, through periodic switching of the pulse burners, the furnace atmosphere can be blended sufficiently, the gas thermal convection capability is enhanced at high radiation, and the heating uniformity of the plate blanks is further improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a heating furnace pulse control system and control method. Background technique [0002] The heating furnace is one of the important equipment in the metallurgical industry. Its function is to heat the billet to meet the requirements of subsequent rolling treatment. The performance of the heating furnace directly affects the rolling quality of the billet. The combustion atmosphere in the furnace, the temperature of the slab out of the furnace, the temperature uniformity of the slab, and the gas consumption have always been important indicators to measure the performance of the heating furnace for steel burning. These parameters are closely related to the combustion control system of the heating furnace. Therefore, the research on the combustion system of the heating furnace is a must very necessary. [0003] At present, the combustion process of the heating furnace has a doub...

AI Technical Summary

Problems solved by technology

After the temperature regulator calculates the rated gas flow rate, it cannot ensure that the burner is always in a high-load combustion state when it is distributed to each burner, so that the flame emitted by the burner is short and the heat radiation ability is weak, and only local high temperature will be generated near the furnace wall , the temperature in the middle of the furnace body is relatively low, the billet is heated unevenly, and the predetermined heating temperature may not be reached in the center

[0005] (2) The utilization rate of flue gas waste heat is low, and the energy consumption per ton of steel is large

When the flow rate is small, the air pressure of the burner pipeline is low, which may cause the burner to backfire, posing a safety hazard, damaging the burner and pipeline, and even causing uncontrollable accidents such as explosions

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