Gasification Pump Interior Coating Abrasion Resistance
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Solution Overview
Problem
Pumps in gasification systems suffer from severe abrasion and damage, reducing their reliability and increasing costs due to short working life.
Innovation Solution
A pump with enhanced abrasion resistance is achieved by coating at least a portion of its interior feedstock-facing surface with a wear-resistant layer, using ion implantation and penetration processes to form a hardened, diffused layer with high adhesion and compressional stress, or applying MCrAlY coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump uses standard material construction without coating, then the device complexity is low and manufacturing is easier, but the abrasion resistance is poor and working life is short
Solution Approach 1:
The patent applies composite material construction by combining the base pump material (steel or cast iron) with a ceramic coating layer. This creates a composite structure where the ceramic coating provides superior abrasion resistance while the base material maintains structural integrity, directly resolving the contradiction between improved reliability and increased device complexity.
Solution Approach 2:
The patent changes the surface properties of the pump by applying a ceramic coating, fundamentally altering the material parameters of the surface layer. This parameter change enables the surface to resist abrasion from solid carbonaceous materials while maintaining the overall pump design simplicity, addressing the reliability-complexity contradiction.
2Duration of action of stationary object
If the pump operates without enhanced surface treatment, then the manufacturing cost is lower, but the working life is short due to severe abrasion damage
Solution Approach 1:
The patent implements preliminary action by applying the ceramic coating during the manufacturing stage before the pump enters service. This preliminary surface treatment ensures long working life by pre-establishing abrasion resistance, while the coating process is integrated into the manufacturing workflow to minimize additional complexity.
3Reliability
If the pump interior surface is coated with wear-resistant material, then the abrasion resistance increases and working life extends, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies local quality by coating only the interior surfaces of the pump that come into contact with solid carbonaceous materials, rather than coating the entire pump. This selective coating approach provides necessary abrasion resistance where needed while minimizing the complexity of the manufacturing process.
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 coating significantly increases the pump's hardness and abrasion resistance, extending its working life and reliability in transporting solid carbonaceous materials under fluctuating temperatures.
Implementation Method 1
at least a portion of the interior feedstock facing surface is coated with a coating
Data Source
AI summary
A pump used in a gasification system, the pump comprises a housing having an inlet and an outlet, a rotor supported within the housing for rotation relative to the housing, the rotor comprising a hub, a plurality of disks spaced apart by sections of the hub, and defining a plurality of transport channels for transporting solid carbonaceous feedstocks for the gasification system, and an interior feedstock facing surface adjacent to the solid carbonaceous feedstocks, wherein at least a portion of the interior feedstock facing surface is coated with a coating.