A method for calculating the maximum wall temperature of different tube sections of a full-screen tube of a power plant boiler

By calculating the flow distribution in a single tube and extrapolating the heat transfer model, the problem of inaccurate wall temperature calculation in existing technologies has been solved. This enables accurate early warning of the highest wall temperature of different materials and sections of tubes in the entire power plant boiler, thereby improving the safety and economy of the boiler.

CN116105119BActive Publication Date: 2026-06-30HARBIN BOILER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN BOILER CO LTD
Filing Date
2022-12-29
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing methods for measuring and calculating boiler wall temperature do not take into account the characteristics of the boiler's heating surface and flue gas temperature, resulting in inaccurate wall temperature calculations and an inability to provide accurate early warnings.

Method used

By calculating the flow distribution of each tube and correcting the flow of the entire tube, and combining the on-site operating performance parameters, the heat transfer model of the heated surface is derived, and the maximum wall temperature of different materials and different sections of each tube in the entire screen is calculated.

Benefits of technology

It enables accurate early warning of the highest wall temperature of different materials and sections of tubes in the entire power plant boiler, improving the boiler's safety and economy and reducing unplanned shutdowns.

✦ Generated by Eureka AI based on patent content.

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Abstract

A method for calculating the maximum wall temperature of different sections of each tube in a power plant boiler's overall heating system is disclosed, relating to the field of boiler early warning technology. This invention addresses the problem that existing wall temperature measurement and calculation methods rely on large-scale data simulations, failing to consider the characteristics of different boiler heating surfaces, flow characteristics, and flue gas temperature characteristics, resulting in inaccurate wall temperature calculations and hindering precise early warning. This invention includes calculating the flow distribution of each individual tube and correcting the flow rate of the entire heating system; calculating the initial heat load based on the flow distribution and on-site operating performance parameters of the entire heating system, correcting the heat load of the entire heating system, and calculating the outlet steam temperature of the entire heating system; and using the heat load and on-site operating data, deriving the heat transfer model of the heating surface to accurately display the maximum wall temperature of different materials and sections of each tube in the entire heating system. This invention is used for early warning of the entire heating system wall temperature in boilers.
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