Boiler steam temperature control method for secondary reheating unit

CN119532724APending Publication Date: 2025-02-28CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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Patent Information

Application Number
CN202411771207.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2025-02-28

AI Technical Summary

Technical Problem

The steam temperature control of the boiler of the secondary reheating unit is complex, and it is difficult for the existing technology to effectively control the two-stage reheating steam temperature, which affects the unit's thermal efficiency and usage time.

Method used

The two-stage water spray temperature reduction adjustment method is adopted, and the first-stage and second-stage temperature reduction water spray is controlled in the cascade structure. The sliding multi-model step prediction controller is used to automatically select the model for prediction and output according to the working conditions, and is implemented in the first-stage and second-stage reheater.

Benefits of technology

It improves the unit output, responds quickly to frequency regulation, enhances the accuracy and stability of steam temperature control, and reduces the impact of the primary frequency regulation capability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a boiler steam temperature control strategy for a secondary reheat unit, which is characterized in that the control strategy adopts an adjusting mode of swinging a burner for adjustment, and a second water spraying point is arranged on a low-temperature reheat steam inlet pipeline for accident water spraying; a second-stage temperature reduction set value of the control strategy is given according to a load function, and a first-stage temperature reduction set value is given through correction of a temperature superposition load function after a second-stage overheating desuperheater; the first-stage temperature reduction and the second-stage temperature reduction adopt a cascade structure; compared with the prior art, by changing the main steam temperature operation parameters, the output of the unit is improved, and the unit quickly responds to frequency modulation.
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