Evaporator System Horizontal Vertical Vessel Segmentation
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Solution Overview
Problem
Conventional evaporator systems for industrial boilers have large diameter vessels due to their functions, leading to thick walls that restrict temperature transients and slow load changes, limiting the system's ability to handle rapid changes in boiler load.
Innovation Solution
The system is redesigned with horizontal and vertical vessels of smaller diameters, where primary water-steam separation occurs in horizontal vessels and final steam drying in vertical vessels, optimizing the heat transfer section for minimal volume and allowing independent design of vessel numbers, enabling faster load changes and high temperature transients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the water-steam drum is designed with a relatively large diameter to contain minimum water and steam volume for guaranteed steam generation and separation, then the steam purity and water level compensation are improved, but the wall thickness increases which limits temperature transients and slows load changes
Solution Approach 1:
The patent divides the single large water-steam drum into multiple smaller horizontal vessels arranged in parallel. Each vessel has its own water-steam separator, creating distributed separation zones. This segmentation allows each vessel to have thinner walls while collectively providing the required steam purity through multiple separation stages, and enables faster load response due to reduced thermal mass.
Solution Approach 2:
The patent transitions from a single large vertical drum to multiple horizontal vessels arranged in parallel. This dimensional reconfiguration distributes the separation function across multiple units, reducing the diameter and wall thickness of individual vessels while maintaining or improving overall steam purity through enhanced separation surface area and distributed water level compensation.
2Reliability
If the water-steam drum is designed with a relatively large diameter to provide space for water-steam separator and steam dryer, then the steam drying capability is improved, but the device complexity and wall thickness increase
Solution Approach 1:
The patent separates the steam drying function from the water-steam separation function by using dedicated vertical vessels for drying. This functional segmentation allows the drying vessels to be optimized specifically for moisture removal with appropriate internals, while the horizontal vessels focus on water-steam separation. The result is improved steam drying capability without requiring a single overly complex large drum.
Solution Approach 2:
The horizontal vessels serve multiple functions: they contain the minimum water volume for steam generation, perform primary water-steam separation, and provide water level compensation. This multi-functionality in smaller units achieves the same capabilities as a large drum while reducing wall thickness and improving thermal response.
3Reliability
If the water-steam drum is designed with a relatively large diameter to contain minimum water volume for feed water interruption, then the steam generation reliability is improved, but the system response time to load changes decreases
Solution Approach 1:
The patent distributes the water storage function across multiple smaller horizontal vessels in parallel. Each vessel contains a portion of the minimum water volume required for steam generation during feed water interruptions. This segmentation reduces the water residence time in each vessel while maintaining total water volume, enabling faster thermal response to load changes while preserving steam generation reliability.
Solution Approach 2:
The patent enables dynamic water level control in each horizontal vessel through individual level sensors and control systems. This allows the system to rapidly adjust water levels in response to load changes and feed water interruptions, improving response time while maintaining the minimum water volume required for reliable steam generation.
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 reduces wall thickness, allowing for faster load changes and high temperature transients, while maintaining efficient steam purity and water level control, with minimal impact on the overall water content and level in the horizontal vessels.
Implementation Method 1
Water from the drum is transported to the heat transfer section where it is partly evaporated
Implementation Method 2
The water-steam mixture generated in the heat transfer section is first transported to these horizontal vessels, where the primary separation of water and steam is realized
Implementation Method 3
Subsequently the separated wet steam is transported to one or more vertical vessels connected in parallel, where the final steam drying takes place
Implementation Method 4
The water level in the vertical vessels is high enough to create the necessary pressure to force the separated water to flow back to the evaporator system
Data Source
AI summary
An evaporator system for an industrial boiler is provided and includes a heat-transfer system for generating a water-steam mixture. At least one horizontal vessel is provided for the primary separation of water and steam. At least one vertical vessel is provided and contains a water level great enough to create the necessary pressure to force the separated water to flow back from the vertical vessel to the evaporator system. The horizontal vessel and the vertical vessel are connected to one another by a piping through which the separated wet steam is transported from the horizontal vessel to the vertical vessel. The horizontal vessel has a connection to a piping for receiving water. The vertical vessel has a connection to piping for extracting dried steam from the vertical vessel.