A hydrogen unloading and hydrogen mixing process system for a gas-fired boiler

By adopting a dual closed-loop control strategy combining feedforward and feedback in the hydrogen unloading and mixing process system of a gas-fired boiler, the response lag problem caused by the reliance on calorimeter feedback adjustment in the existing technology has been solved, achieving precise blending of hydrogen and natural gas and combustion stability, and improving the continuity and reliability of the system.

CN122107280APending Publication Date: 2026-05-29CHINA COAL (NANJING) ELECTRIC POWER TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA COAL (NANJING) ELECTRIC POWER TECHNOLOGY CO LTD
Filing Date
2026-04-20
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing gas-fired boiler hydrogen unloading and mixing processes, the reliance on calorimeter feedback adjustment leads to response lag, making it difficult to accurately control the hydrogen ratio based on changes in natural gas flow in a timely manner. This results in large fluctuations in the mixed gas concentration and poor combustion stability.

Method used

A dual closed-loop control strategy combining feedforward and feedback is adopted. The hydrogen flow rate is controlled in real time by a natural gas flow meter, and the hydrogen flow rate is corrected by feedback from a hydrogen analyzer. This constructs a coordinated operation between the hydrogen unloading unit and the hydrogen mixing unit to ensure the precise mixing of hydrogen and natural gas.

Benefits of technology

It achieves safe, stable, and precise blending of hydrogen and natural gas, improves combustion stability and system reliability, ensures that the mixed gas concentration is within the set range, and enhances the continuity and availability of the system.

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Abstract

The present application belongs to hydrogen energy utilization technical field, disclose a kind of gas boiler hydrogen removal hydrogen mixing process system, including hydrogen removal unit and hydrogen mixing unit;Hydrogen removal unit is used to connect hydrogen transport equipment, receives hydrogen gas output by hydrogen transport equipment, and the hydrogen gas received is transported to hydrogen mixing unit after decompression;Hydrogen mixing unit includes hydrogen pipeline, natural gas pipeline, static mixer and control module;The inlet of hydrogen pipeline is connected with the outlet of hydrogen removal unit, for receiving the hydrogen gas after decompression;The inlet of natural gas pipeline is used to connect the natural gas source outside;Control module is configured to feed forward control hydrogen flow according to natural gas flow in natural gas pipeline, and correct hydrogen flow according to hydrogen concentration of static mixer outlet feedback;Effectively solve the problem that existing technology depends on calorimeter for feedback regulation, leading to response lag, difficult to accurately control hydrogen proportioning amount according to natural gas flow change in time, resulting in mixed gas concentration fluctuation, poor combustion stability.
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