Sulfur Bath Oxygen Inlets for High-Purity Sulfur Trioxide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sulfur trioxide production methods require complex designs to manage high temperatures and nitrogen oxide formation, leading to space inefficiencies and environmental pollution, with incomplete reactions and sulfur vapor issues.
Innovation Solution
A method involving a sulfur bath with controlled high pressure and a heat transfer medium to generate process gas at a temperature suitable for catalytic oxidation, using pure oxygen to minimize inert gases and prevent sulfur vapor formation, with multiple oxygen inlets for efficient reaction and a catalyst for complete conversion to sulfur trioxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If ambient air is used as oxygen source, then device complexity is reduced, but nitrogen oxides are formed causing environmental pollution and requiring special purification
Solution Approach 1:
The patent replaces ambient air with pure oxygen or oxygen-enriched air as the oxygen source. This eliminates nitrogen from the reaction environment, preventing nitrogen oxide formation while maintaining the sulfur oxidation process. The inert atmosphere principle is applied by removing the reactive nitrogen component that causes harmful byproducts.
2Object-generated harmful factors
If pure oxygen is used to reduce nitrogen oxides, then environmental impact is minimized, but released energy increases requiring more complex cooling systems
Solution Approach 1:
The patent extracts and removes the harmful nitrogen component from the oxygen source, using only pure oxygen or oxygen-enriched air. This extraction of nitrogen eliminates the root cause of nitrogen oxide formation while the energy management is handled separately through standard cooling systems.
Solution Approach 2:
The patent converts the high energy release from pure oxygen reaction into a benefit by implementing efficient heat exchanger systems that capture and utilize this energy for preheating feed streams and generating steam, turning what appears to be a disadvantage into a useful resource.
3Productivity
If multiple oxygen inlets are used to improve reaction completeness, then conversion efficiency increases, but sulfur vapor formation increases requiring additional cooling
Solution Approach 1:
The patent divides the oxygen introduction into multiple staged inlets positioned at different locations within the reaction zone. This segmentation allows progressive oxidation of sulfur, improving conversion efficiency while distributing heat generation to prevent localized overheating and sulfur vapor formation.
Solution Approach 2:
The patent implements preliminary heating of the sulfur feedstock to optimal reaction temperature before oxygen introduction, and uses pre-positioned heat exchangers to immediately manage the heat released. This preliminary action prepares the system to handle the exothermic reaction efficiently without excessive temperature rise.
4Temperature
If generator is divided into multiple reaction zones to dissipate energy, then temperature control improves, but device complexity and space requirements increase
Solution Approach 1:
The patent nests heat exchanger components within the reaction zones, placing cooling surfaces directly inside the reaction vessels. This nested arrangement allows efficient heat dissipation without requiring separate external cooling chambers, reducing overall space requirements while maintaining temperature control.
Solution Approach 2:
The patent merges the reaction zones with heat exchange functionality by integrating heat exchanger surfaces directly into the reactor walls and internal structures. This combination eliminates the need for separate cooling systems and reduces the overall footprint of the generator.
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 approach allows for efficient sulfur trioxide production with reduced space requirements, minimized environmental impact, and high conversion rates without the need for additional cooling or complex cooling systems, producing high-purity sulfuric acid.
Implementation Method 1
Since the reaction of the sulfur with the oxygen contained in the ambient air is exothermic, the temperature in the generator can rise to over 1000 °C
Implementation Method 2
heat transfer takes place with a heat transfer medium guided within the sulfur bath
Implementation Method 3
the sulfur dioxide contained in the process gas is catalytically oxidized to sulfur trioxide
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a process for the production of sulfur trioxide and optionally sulfuric acid, in particular sulfuric acid of electronic grade, wherein oxygen (O2) is introduced via several inlets (7) into a sulfur bath (5) consisting essentially of liquid sulfur (S) and is reacted with the sulfur (S), whereby a process gas comprising sulfur dioxide is generated, after which the sulfur dioxide contained in the process gas is catalytically oxidized to sulfur trioxide.According to the invention, the process gas is generated in a high-pressure area and under temperature control of the sulfur bath (5), with heat transfer via a heat transfer medium (27) guided within the sulfur bath (5), at a temperature suitable for subsequent catalytic oxidation. The process gas is then catalytically oxidized in the high-pressure area before an oxidized process gas containing sulfur trioxide is transferred to a low-pressure area. The invention further relates to a device (1) for producing sulfur trioxide and optionally sulfuric acid. The invention also relates to the use of such a device (1).