HRSG Exhaust Flow Regulator With Guide Plate for Uniform Gas Distribution
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Solution Overview
Problem
Conventional heat recovery steam generators (HRSGs) face inefficiencies due to non-homogenized exhaust gas flows, leading to uneven flow rates and temperatures, which can cause damage to heat transfer tubes and reduce efficiency.
Innovation Solution
An exhaust gas flow regulator comprising a plurality of first tubes, a support plate, and a second tube with a guide plate that redirects exhaust gases to homogenize the flow, ensuring even distribution and reducing thermal expansion issues through bolt connections that absorb expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If exhaust gases flow directly into the HRSG without regulation, then the heat recovery process can proceed, but the flow becomes completely turbulent and uneven, causing damage to heat transfer tubes and reducing efficiency
Solution Approach 1:
The exhaust gas flow is divided into multiple separate flow paths by the plurality of first tubes. This segmentation transforms the single turbulent flow into multiple controlled flow streams, reducing turbulence and preventing damage to heat transfer tubes while maintaining effective heat recovery.
Solution Approach 2:
The support plate with multiple first tubes acts as an intermediary structure between the exhaust gas inlet and the heat recovery system. It mediates the flow by distributing exhaust gases uniformly across multiple paths, preventing direct turbulent impact on heat transfer tubes.
2Productivity
If the flow of exhaust gases is not homogenized, then the structure remains simple, but the flow rate and temperature become highly uneven, reducing HRSG efficiency
Solution Approach 1:
Each first tube provides a localized controlled flow path with specific characteristics. The guide plates on second tubes locally redirect exhaust gases to specific first tubes, creating localized flow homogenization that collectively improves overall HRSG efficiency.
Solution Approach 2:
The support plate with multiple first tubes serves as an intermediary that distributes exhaust gases uniformly. This intermediate structure homogenizes the flow before it enters the heat recovery section, improving efficiency without requiring complex active control systems.
3Ease of operation
If guide plates are added to redirect exhaust gases, then flow distribution improves, but the assembly complexity increases
Solution Approach 1:
The guide plates are merged with the second tubes as integrated components. This combining of functions reduces the number of separate parts and simplifies assembly while maintaining effective flow redirection and distribution uniformity.
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
The solution effectively diffuses exhaust gases, reduces resistance, and prevents damage to heat transfer tubes by ensuring a uniform flow, enhancing the efficiency of the HRSG and reducing assembly complexity.
Implementation Method 1
a guide plate configured to redirect exhaust gases flowing around or on the second tube toward the plurality of first tubes
Implementation Method 2
The solution effectively diffuses exhaust gases, reduces resistance, and prevents damage to heat transfer tubes by ensuring a uniform flow
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
An exhaust gas flow regulator and a heat recovery steam generator including the same are provided. The exhaust gas flow regulator includes a plurality of first tubes spaced apart from each other in a vertical direction, a support plate disposed in a direction perpendicular to the extension direction of the first tubes and through which the plurality of first tubes penetrates, and a second tube disposed at one or both ends of the support plate so as to be coupled to the support plate and extending parallel to the first tubes, wherein the second tube is provided with a guide plate disposed to redirect exhaust gases flowing adjacent to the second tube toward the first tube.