Radial Adsorber Corrosion Resistance via Localized Material Selection
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Solution Overview
Problem
Existing radial adsorbers made of carbon steel face corrosion issues when dealing with corrosive impurities in gas streams, particularly in industrial sites with high pollution levels, leading to equipment damage and the need for costly pretreatment and water washing processes.
Innovation Solution
A radial adsorber design featuring a carbon steel casing with internal and external perforated grids made of corrosion-resistant materials, allowing centrifugal gas circulation and centripetal regeneration, along with corrosion-resistant equipment and adsorbents, to effectively handle corrosive impurities like HCl, NOx, and SOx, while collecting and recycling liquids for acid water washing or production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If carbon steel is used for the radial adsorber casing, then manufacturing cost is reduced, but corrosion resistance against corrosive impurities deteriorates
Solution Approach 1:
The patent applies different material qualities to different parts of the adsorber system. The casing and external structures use carbon steel for cost-effectiveness, while the internal grids and components directly contacting corrosive impurities use corrosion-resistant materials. This localized differentiation resolves the contradiction by providing corrosion resistance only where needed while maintaining overall manufacturing economy.
Solution Approach 2:
The system employs a composite material strategy where carbon steel forms the primary structure and corrosion-resistant materials (such as stainless steel or coated metals) are applied to specific internal components. This creates a hybrid system that leverages the cost advantages of carbon steel while incorporating corrosion protection where required by the technical environment.
2Reliability
If extensive pretreatment and water washing installations are added, then corrosion protection is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the corrosion protection function from complex external pretreatment systems and integrates it directly into the adsorber structure itself. By incorporating corrosion-resistant materials within the adsorber, the system eliminates the need for separate pretreatment and water washing installations, thereby reducing device complexity while maintaining corrosion protection.
Solution Approach 2:
The adsorber system provides its own corrosion protection through internally integrated corrosion-resistant components. This self-service approach eliminates dependence on external protective systems, simplifying the overall equipment configuration while ensuring reliable corrosion resistance where impurities contact the system.
3Ease of manufacture
If carbon steel is used for internal grids, then manufacturing cost is reduced, but service life deteriorates due to corrosion
Solution Approach 1:
The patent applies corrosion-resistant materials specifically to the internal grids that contact corrosive impurities, while other non-critical components may use carbon steel. This localized application ensures extended service life for corrosion-prone parts without unnecessarily increasing manufacturing costs across the entire system.
Solution Approach 2:
By incorporating corrosion-resistant materials in the internal grids from the design stage, the system preemptively protects against corrosion before it can degrade the components. This preliminary protective measure extends service life and reduces long-term maintenance costs.
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 extends the service life of the equipment beyond 10 years, reduces costs and energy consumption, and minimizes water pollution, effectively purifying gas streams with corrosive impurities without the need for extensive pretreatment or water washing installations.
Implementation Method 1
Facility and method for purification by adsorption of a gaseous flow comprising at least one corrosive impurity
Implementation Method 2
allowing centrifugal gas circulation
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a facility for purification by adsorption of a gaseous flow (1) comprising at least one impurity which has a corrosive effect on carbon steel, comprising a radial adsorber (10) comprising: a housing (11) with an outer envelope made of carbon steel; a vertical perforated inner grating (15) consisting of a corrosion-resistant material; a vertical perforated outer grating (14); an adsorbent (30) which is held vertically by the outer grating and the inner grating, allowing the partial blockage of said corrosive impurity; and means allowing a centrifugal circulation of the gaseous flow.