Afterheat recycling device for continuous cast secondary cooling section

Abstract

The invention discloses an afterheat recycling device for a continuous cast secondary cooling section. The afterheat recycling device comprises an afterheat recycling system and a steam generation system, wherein the afterheat recycling system comprises an intermediate-temperate salt bath pool (3) in which a roller shaft (2) is arranged and an intermediate-temperate salt dissolving furnace (5) connected with the intermediate-temperate salt bath pool; according to the afterheat recycling system, molten salt is used as a heat exchange medium; the steam generation system comprises a water tank (9), a water feed pump (10), a deaerator (11), a heat exchanger (6), a steam pocket (12) and a steam accumulator (13); and the heat exchanger is respectively connected with the intermediate-temperate salt bath pool and the intermediate-temperate salt dissolving furnace of the afterheat recycling system. By adopting the system, the afterheat recycling device for the continuous cast secondary cooling section can convert heat energy of steel billets into steam heat energy and is high in heat energy recycling rate.

Description

technical field [0001] The invention relates to the field of devices for utilizing waste heat, in particular to a device for producing steam by using the waste heat of the secondary cooling section of continuous casting. Background technique [0002] In the continuous casting process, in order to make the slab solidify faster and pull the slab smoothly, a secondary cooling system is set after the crystallizer. Secondary cooling is mainly to spray cooling water directly onto the surface of the slab, so that the slab is rapidly cooled and solidified. The cooling strength, nozzle structure and configuration are directly related to the quality and output of the slab. Therefore, in the modern slab production It is inevitable that the air-water cooling system will replace the ordinary water cooling system. In the second cooling section of continuous casting, the liquid molten steel is initially cooled to form a hard shell on the outside, the temperature drops to about 1300°C, and...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to improve the design of the existing waste heat recovery and utilization device in order to overcome the shortcomings of the existing waste heat recovery and utilization device, such as low waste heat utilization rate and poor heat exchange effect in the high temperature section, to obtain a Heat energy is converted into steam heat energy, waste heat recovery and utilization device in the secondary cooling section of continuous casting with high heat recovery and utilization rate in the high temperature section

Images