Sloped Baffle Layout in Vertical Vapor Generators
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Solution Overview
Problem
Conventional vertical vapor generators with horizontal baffles experience issues of vapor stagnation and fouling growth due to horizontal surfaces, leading to overheating and corrosion of exchanging tubes, particularly in high-temperature and high-pressure applications.
Innovation Solution
The use of sloped single-segment, multi-segment, cone, and truncated cone baffles with chords parallel to the ground and facing upwards, promoting an upward flow component to mitigate vapor stagnation and remove deposits, ensuring a two-dimensional shell-side flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If horizontal baffles are used in vertical vapor generators, then the structure is simple and easy to manufacture, but vapor stagnation and fouling growth occur leading to overheating and corrosion
Solution Approach 1:
The patent applies asymmetry by tilting the baffles at an angle between 5-45 degrees relative to the horizontal plane. This asymmetric orientation prevents vapor from stagnating on the upper surface and eliminates dead zones where fouling could accumulate, while still maintaining structural simplicity and ease of manufacture
Solution Approach 2:
The invention introduces a new dimensional aspect by tilting the baffles out of the horizontal plane. This creates a three-dimensional flow pattern that directs vapor and liquid phases along the tilted surface, preventing stagnation and promoting continuous flow, thereby eliminating the fouling issues associated with conventional horizontal baffles
2Reliability
If sloped baffles are used to prevent vapor stagnation, then reliability improves, but device complexity increases
Solution Approach 1:
The patent changes the geometric parameter of the baffle orientation from horizontal (0 degrees) to tilted (5-45 degrees). This parameter modification achieves the dual benefit of preventing vapor stagnation and fouling while maintaining structural simplicity, as the same baffle design can be used throughout the system with only the angle parameter varied
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 prevents vapor stagnation and fouling, enhancing the reliability and operating life of vertical vapor generators by maintaining efficient heat exchange and preventing corrosion.
Implementation Method 1
sloped single-segment, multi-segment, cone and truncated cone baffles with chords parallel to the ground and facing upwards, promoting an upward flow component
Implementation Method 2
shell-and-tube type vapor generator, substantially with cylindrical geometry and vertical longitudinal axis, to realize an indirect heat exchange between a tube-side fluid and a shell-side fluid
Implementation Method 3
where the shell-side fluid boils and moves upwards
Data Source
AI summary
Vertical vapor generator of shell-and-tube type, for an indirect heat exchange between a tube-side fluid to be cooled and a boiling shell-side fluid, and operating method thereof. The vertical vapor generator includes shell-side baffles having a slope to promote the upward outflow of vapor from the lower surface of the baffles and the downward outflow of gravity deposits from the upper surface of the baffles. In embodiments, the vertical vapor generator mitigates or eliminates overheating and corrosion phenomena near the baffles and provides increased reliability and operating life. Operating methods are also disclosed.