Low-emission gas turbine plant for peak load and processes

By injecting water or ammonia water into the exhaust gas duct of gas turbines, the NOx emissions are reduced, and the gas turbines can operate efficiently and flexibly, addressing the challenges of peak loads and hydrogen fuel use while meeting stringent emission limits.

DE102023210753A1Inactive Publication Date: 2025-04-30SIEMENS ENERGY GLOBAL GMBH & CO KG
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Patent Information

Application Number
DE102023210753
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-10-30
Publication Date
2025-04-30
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Modern gas turbines face challenges in reducing NOx emissions, especially when operating at peak loads or using hydrogen as fuel, due to the high combustion temperatures and stringent emission limits.

Method used

The solution involves injecting water or ammonia water into the exhaust gas duct of the gas turbine to cool the exhaust gases, thereby reducing the NOx emissions and adapting the exhaust gas temperature to the optimal operating range of the SCR catalyst.

Benefits of technology

This approach effectively reduces NOx emissions, increases the flexibility and availability of gas turbines, and allows for efficient operation at low partial loads while maintaining high combustion temperatures, thus optimizing energy use and compliance with emission regulations.

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Abstract

The invention relates to a system comprising at least a gas turbine, a generator, a chimney (16) into which the hot exhaust gas of the gas turbine can be directed, a catalyst section (39) in the chimney (16), wherein nozzles (36) are arranged upstream of the catalyst section (39) which can inject a liquid in order to reduce the temperature of the hot exhaust gas of the gas turbine, optionally a steam turbine and heat recovery steam generator (HRSG).
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Citation Information

Patent Citations

  • Device for operating an incineration plant, in particular in the form of combined heat and power or a combined heat and power plant with an exhaust gas cleaning system, in particular for burning heavy fuel oil or heavy oil

    DE9308772U1

  • Gas turbine facility and method for suppressing discharge of ammonia in gas turbine facility

    JP2023012236A

  • Catalytic purification process and device for exhaust gas from a combustion system

    WO1997001387A1

  • JP002023012236A