Gas Turbine Intake Duct Segmented Water Mist Structure
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Solution Overview
Problem
The high rate of abrasion of atomization nozzles in gas turbines' air inlet ducts complicates maintenance and replacement, as they wear out quickly due to high-speed air jets, necessitating frequent maintenance or replacement.
Innovation Solution
The design includes self-supporting transition sections in the air inlet duct, allowing the water mist generation structure to be removable independently, facilitating maintenance and replacement by creating a partially or completely empty space between sections, enabling easy access and detachment of the structure and nozzles without demounting the duct sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If atomization nozzles are used in high-speed air flow, then water mist generation efficiency is improved, but nozzle durability deteriorates due to high rate of abrasion
Solution Approach 1:
The inlet duct is divided into multiple self-supporting transition sections that can be independently demounted. This segmentation allows access to nozzles located in different sections without dismantling the entire duct, facilitating easier maintenance and replacement of worn nozzles while maintaining high-speed air flow for effective water mist generation.
2Productivity
If nozzles are installed inside the air passage duct, then water mist injection is effective, but maintenance complexity increases due to difficult access
Solution Approach 1:
The inlet duct is segmented into multiple self-supporting transition sections that can be independently removed. Nozzles are distributed across these sections, allowing maintenance personnel to access and replace nozzles by demounting only the specific section containing the worn nozzle, rather than accessing all nozzles from within the confined space of the air passage duct.
Solution Approach 2:
The transition sections containing nozzles are extracted from the main inlet duct structure. These sections can be demounted and removed to provide external access to the nozzles, enabling maintenance operations to be performed outside the air passage duct where space and accessibility are significantly improved.
3Strength
If the inlet duct is designed as a single integrated structure, then structural integrity is improved, but maintenance time increases due to difficulty in accessing internal components
Solution Approach 1:
The inlet duct is segmented into multiple self-supporting transition sections that maintain structural integrity when assembled but can be independently demounted for maintenance. Each section is designed to support itself, allowing rapid removal and replacement without compromising the overall structural strength of the inlet duct system.
Solution Approach 2:
The inlet duct structure transitions from a static integrated design to a dynamic modular design where sections can be assembled and disassembled as needed. This dynamic capability allows the structure to maintain integrity during operation while enabling quick access to nozzles during maintenance, significantly reducing maintenance time.
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 design simplifies the maintenance and replacement process by allowing operations to be performed outside the air passage duct, reducing the complexity and labor required for nozzle replacement and maintenance, thus extending the lifespan of the nozzles and reducing downtime.
Implementation Method 1
The air is generally saturated with water in the form of a mist of fine droplets... Fast evaporation of the droplets (in approximately 10 milliseconds) inside an axial compressor enables the compressor to increase the air mass flow rate
Implementation Method 2
a source of demineralized water, feed pipes, control and isolating valves, a pump for compressing the water and a support structure with one or more atomization nozzles placed inside the air intake circuit
Data Source
AI summary
The invention concerns an air inlet duct (10) for a compressor (12) of a gas or fuel oil turbine, including:two transition sections (S3, S4) in fluid communication with one another for the circulation of a flow of air through said sections (S3, S4), each of said sections (S3, S4) being self-supporting,a structure (20) for injecting a mist of liquid particles, configured to be disposed between said sections (S3, S4) and in contact with said sections (S3, S4), the structure (20) being removable independently of demounting said sections (S3, S4).The invention also concerns a gas or fuel oil turbine assembly comprising an inlet duct (10) of this type and a method of maintaining an inlet duct (10) of this type.