Combined Steam Drum Layout for Oxygen-Depleted Process Steam
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Solution Overview
Problem
Existing water treatment systems for high-temperature solid oxide electrolysis are complex and inefficient, leading to increased construction costs and operational complexity, with untreated water causing corrosion and impurities that affect the quality of the product gas.
Innovation Solution
A simplified water treatment system combining a stripper and steam drum into a single combined vessel, using a heating arrangement to produce oxygen-depleted, dried process steam by vaporizing liquid water and removing entrained droplets, thereby reducing the need for separate reactors and control instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional water treatment system with separate stripper, surge vessel, and steam drum is used, then water can be treated to remove oxygen and impurities, but the system complexity and construction costs increase due to multiple vessels and piping requirements
Solution Approach 1:
The patent combines the surge vessel and steam drum into a single combined vessel that performs both functions. The vessel has a steam generation zone at the bottom and a surge storage zone at the top, eliminating the need for separate vessels while maintaining water treatment effectiveness through integrated design
Solution Approach 2:
The combined vessel serves multiple functions simultaneously: it acts as both a surge vessel for water storage and a steam drum for steam generation and separation. This multi-functional design reduces the overall number of components while maintaining the necessary water treatment capabilities
2Reliability
If multiple separate vessels and equipment are used for water treatment, then complete water treatment can be achieved, but construction costs and metal usage increase
Solution Approach 1:
By merging two separate vessels (surge vessel and steam drum) into one combined vessel, the total metal usage is reduced while still achieving complete water treatment. The integrated structure eliminates redundant components and reduces overall material requirements
3Ease of operation
If separate control instruments for each vessel are used, then precise control can be maintained, but operational complexity and cost increase
Solution Approach 1:
The combined vessel integrates the control functions for both surge water level and steam generation into a single integrated control system, reducing the number of separate control instruments while maintaining effective process control through unified management
4Device complexity
If untreated water is used in the electrolysis process, then the system is simpler, but corrosion and impurities affect product gas quality
Solution Approach 1:
The water treatment system performs preliminary treatment of the water stream before it enters the electrolysis process. The stripper removes oxygen and the combined vessel ensures proper water quality, preventing corrosion and impurities from affecting the product gas while maintaining reasonable system complexity
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 simplification reduces construction costs and operational complexity by minimizing metal usage and piping requirements, while ensuring high-purity steam production for solid oxide electrolysis, enhancing the efficiency and reliability of the electrolysis process.
Implementation Method 1
a heating arrangement for vaporizing liquid water to steam
Implementation Method 2
a stripper for stripping oxygen from water
Implementation Method 3
a fluid separator for separating water from steam
Data Source
AI summary
The present invention regards an improved water treatment system and a water treatment process for producing an oxygen depleted, dried process steam suitable for use in high-temperature solid oxide electrolysis. The system and the process has been simplified compared to prior art systems and processes.