Ammonia Injector for Gas Turbine NOx Reduction
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Solution Overview
Problem
The existing combustion devices using ammonia as a reducing agent for NOx reduction in gas turbines do not achieve high efficiency in reducing nitrogen oxide emissions.
Innovation Solution
The combustion device incorporates a reducing agent injector with multiple injection holes around the flames to inject ammonia directly into the combustion chamber, optimizing the injection direction and velocity to enhance NOx reduction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If ammonia is supplied to the downstream side of the combustor to reduce NOx, then NOx reduction is achieved, but the reduction efficiency is not high because ammonia may not efficiently act as a reducing agent
Solution Approach 1:
The patent introduces a reducing agent injector that supplies ammonia to the upstream side of the combustor before the flames are fully formed. This preliminary action allows ammonia to mix with the combustion gases earlier in the process, ensuring it is present and active when NOx formation occurs, thereby improving reduction efficiency compared to downstream injection
Solution Approach 2:
The patent employs a reducing agent injector as an intermediary device that facilitates the interaction between ammonia and combustion gases. This injector is specifically designed with injection holes positioned to direct ammonia toward the flames, creating an effective intermediary mechanism that enhances the reducing action of ammonia on NOx
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly improves the reduction efficiency of nitrogen oxide emissions by ensuring ammonia effectively acts on the NOx within the flames, leading to better emission control.
Implementation Method 1
the nitrogen oxide (NOx) produced on the upstream side in the combustor is reduced to nitrogen (N 2 ) by being mixed with ammonia on the downstream side therein
Implementation Method 2
combustion device and a gas turbine that combust ammonia as fuel
Data Source
Figure 1
Figure 2A~2B
AI summary
The combustion device (C) is a combustion device in which fuel is combusted in a combustion chamber (N) using combustion air, the combustion device including a reducing agent injector that injects a reducing agent toward flames in the combustion chamber.