High-temperature billet waste heat recovery and utilization system and method based on phase change heat storage

CN117190722BActive Publication Date: 2026-07-07SHANDONG UNIV
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Patent Information

Application Number
CN202311377382.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-23
Publication Date
2026-07-07
Estimated Expiration
2043-10-23

AI Technical Summary

Technical Problem

In the steel production process, the residual heat during the cooling of high-temperature steel billets is wasted. Existing waste heat recovery and utilization schemes have low utilization rates and cannot achieve refined utilization of waste heat.

Method used

A waste heat recovery and utilization system based on phase change heat storage is adopted. Through components such as water-cooled walls, heat transfer oil radiant heat exchange tubes, multi-stage heat accumulators and air preheaters, the waste heat of high-temperature steel billets is recovered and utilized for the preparation of domestic hot water and grain drying.

Benefits of technology

Without affecting the cooling of high-temperature steel billets, the waste heat was reused, the fuel utilization rate was improved, and a more comprehensive utilization of waste heat was achieved through a multi-stage waste heat recovery device.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a waste heat recovery system and method for high-temperature steel billets based on phase change heat storage. A downcomer is arranged on the outer wall of the cooling chamber, with its first end connected to the boiler drum and its second end connected to a water collection tank. The inner cavity of the water-cooled wall is connected to both the boiler drum and the water collection tank. A heat-conducting oil radiant heat exchanger connected to a medium-temperature phase change heat storage device is arranged in the upper part of the cooling chamber. A flue connected to the cooling chamber is arranged above the steel billet inlet / outlet channel of the cooling chamber. A hot water tube bundle, a feedwater preheater, an air preheater, and an air filter are arranged sequentially within the flue. The outlet of the air preheater is connected to the air duct of the cooling chamber via a pipeline. A cold water source is connected to the feedwater preheater. The outlet of the feedwater preheater is connected to the inlet of the hot water tube bundle. The outlet of the hot water tube bundle is connected to the boiler drum. The outlet of the air filter is connected to a grain drying tower via an induced draft fan. This invention realizes the reuse of waste heat from high-temperature steel billets.
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Citation Information

Patent Citations

  • Power-generating boiler capable of cooling steel products and recovering afterheat in steelmaking and steel-rolling process

    CN101793466A

  • Radiation waste heat recycling system based on phase change heat storage and operation method thereof

    CN115876020A