Waste heat recovery device for steel ingot extraction

Abstract

The invention discloses a waste heat recovery device for steel ingot extraction. The waste heat recovery device comprises an extraction furnace; steel ingot extraction heating is performed in the extraction furnace; a solenoid valve for controlling the medium flow direction and speed is mounted at the bottom of the extraction furnace; a liquid-gas separator communicates with a heat exchange modulecapable of realizing mutual transferring and exchange of temperatures of cold and hot media; a preheater for increasing the heat of the extraction furnace is connected below the heat exchange module;the solenoid valve is connected with a coil pipe; and the coil pipe communicates with a dust removal box. According to the waste heat recovery device for steel ingot extraction, a flow guiding pipe and the coil pipe are arranged to transfer air flows and conduct the heat, the electric energy is saved, the complete combustion degree is guaranteed, the probability of incomplete combustion is completely eradicated, the temperature difference change is used as the driving force during sensible heat exchange of a phase-change heat exchanger, and better heat transfer is realized.

Description

technical field [0001] The invention relates to waste heat recovery equipment, in particular to a waste heat recovery device for refining steel ingots. Background technique [0002] Hot metal and scrap steel contain impurities such as C, Mn, Si, P, S, etc. During the low-temperature melting process, C, Si, P, and S are oxidized, even if the impurities in the single substance state become the impurities in the combined state, so as to facilitate further removal in the later stage Impurities. The oxidation process is a reaction of decarburization, dephosphorization, degassing, and impurity removal at high temperature. At the end of oxidation, the steel contains a large amount of excess oxygen. Remove the excess oxygen in the molten steel, and the harmful gas CO produced is discharged with the furnace gas, and the molten steel smelted from the steelmaking furnace contains a small amount of gas and impurities. Generally, the molten steel is injected into the refining ladle for ...

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Problems solved by technology

[0003] In view of the above situation, the technical problem to be solved by the present invention is to provide a waste heat recovery device for steel ingot refining. , so as to increase the loss of smoke exhaust and power consumption in vain, and the temperature of the burning material will also be reduced due to the gas that is instantly incorporated, resulting in a substantial increase in the incomplete combustion of the material; on the other hand, when the temperature of the heat exchange module The temperature is lower than the temperature when the air itself is cooled to saturation. Even under a certain air pressure, the water vapor in the air will condense and condense into water on the heat exchange equipment, causing film condensation, which affects the overall heat exchange efficiency.

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