A dual-function system for circulating cooling and waste heat conversion in a cast pipe annealing furnace

By using a dual-function system of circulating cooling and waste heat conversion in the annealing furnace for cast pipes, the problems of increased oxide scale and energy waste caused by the cooling method of the annealing furnace are solved, thereby improving the surface quality of cast pipes and achieving efficient energy utilization, resulting in zero emissions and green production.

CN224280372UActive Publication Date: 2026-05-26DALIAN WANTONG ENERGY EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DALIAN WANTONG ENERGY EQUIP CO LTD
Filing Date
2025-07-11
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing cooling method of annealing furnaces leads to an increase in oxide scale on cast pipes, high flue gas emission temperature, and serious energy waste and environmental pollution.

Method used

The system employs a dual-function system of circulating cooling and waste heat conversion for the annealing furnace of cast pipes, including a cooling air circulation system, a hot flue gas emission system, and a steam conversion system. Through circulating cooling and multiple heat exchanges, the hot flue gas from the annealing furnace is converted into hot air and steam for use by other equipment.

Benefits of technology

This has resulted in improved surface quality of cast iron pipes, reduced energy consumption, reduced pollution, and the achievement of zero emissions and green production.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the technical field of pipe casting production equipment, and provides a dual-function system for circulating cooling and waste heat conversion in a pipe casting annealing furnace, comprising: a cooling air inlet circulation system, a hot flue gas exhaust system, a heat exchange system, and a steam conversion system. This utility model meets the process requirements for rapid cooling in the quenching and slow cooling sections of the annealing furnace, and simultaneously converts excess hot flue gas from both sections into hot air and steam for use in other equipment requiring hot air and steam. While meeting process requirements, it significantly saves costs, conserves energy, and reduces consumption, achieving green production.
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