Heat supply system and heat supply method for soaking pit furnace

Abstract

The invention discloses a heat supply system and a heat supply method for a soaking pit furnace. A long coal gas flame burner is replaced by a high velocity burner, and double-cross limit control is replaced by pulse control. The heat transfer mode between a steel ingot and burner gas is changed due to the high velocity burner, the traditional single heat transfer mode of heating the steel ingot by flame radiation of the burner is changed into convection and radiation two heat transfer modes, so that the steel ingot heating time is shortened, hot furnace gas in a hearth is intensively disturbed by the high-velocity hot air sprayed from the high-velocity burner, so that the furnace air in the furnace can be more uniform, the temperature field of the hearth can be more uniform, and the heating quality of the steel ingot can be improved. Due to the pulse control, full-automatic operation, full-automatic ignition, automatic flame monitor, flameout alarm cutoff and automatic temperature control can be realized on the high-velocity burner, the high-velocity burner can be in an optimized work state, hot air intensive disturbance, intensified convection and radiation heat transfer can be guaranteed, the burner is guaranteed to be in an optimized work station in each startup, the shape and performance of flame cannot be influenced by regulation of heat supply amount, and uneven temperature field in the furnace cannot happen.

Description

Technical field [0001] The invention relates to a heat treatment system and a heat treatment method of a steel billet, in particular to a heat supply system and a heat supply method of a soaking furnace. Background technique [0002] At present, the heat exchange type upper single-side burner soaking furnace is widely used in various countries, and its structure is as figure 1 Shown. The hearth 104 of the soaking furnace is a pit type, also called a pit-type soaking furnace. The upper part of the soaking furnace is a movable furnace cover, and several furnace pits are a group, and the tong-type crane is used to load and discharge materials from the upper mouth of the furnace pit. The burner 101 is arranged on one end wall of the rectangular furnace pit, the flame is U-shaped, and the flue gas is discharged from the exhaust port under the burner 101 at the heating end and enters the heat exchanger 103 through the flue 102. A temperature measuring hole 105 is provided on the end w...

AI Technical Summary

Problems solved by technology

The disadvantage of the conventional double-crossing limiter control is that the change of the heat load causes the change of the amount of fuel supplied to the burner, so that the flame ejected from the burner changes.

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