Expandable Injection Lance for Sorbent Dispersion
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Solution Overview
Problem
Existing dry sorbent injection systems face challenges in achieving thorough mixing and dispersion of alkaline materials into gas streams due to limited turbulence and buildup issues, requiring multiple lance systems and structures that can create transient turbulent zones without increasing pressure drop.
Innovation Solution
A removable lance assembly with a expandable or rotating blade or wing structure that increases the diameter of the turbulence zone beyond the access point, preventing particulate buildup and allowing for adjustable placement without permanent baffles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simple ejection nozzles are used to disperse solid particles, then the device complexity is low, but the dispersion effectiveness and mixing thoroughness are insufficient
Solution Approach 1:
The lance assembly incorporates movable wings or blades that can rotate or expand from a retracted position to a deployed position. This dynamic mechanism allows the assembly to create a larger diameter turbulence zone than the access port size would normally permit, thereby improving dispersion effectiveness without requiring a permanently large structure
Solution Approach 2:
The lance assembly is divided into separate functional components: the lance body, the shroud, and the movable wings or blades. This segmentation allows each component to perform its specific function independently while working together to achieve thorough mixing, resolving the contradiction between simplicity and effectiveness
2Productivity
If permanently deployed baffles are added at multiple points to create turbulent flow, then the dispersion effectiveness improves, but the pressure drop increases deleteriously
Solution Approach 1:
The movable wings or blades can be deployed only when needed for injection operations and retracted otherwise, creating turbulence on-demand rather than continuously. This dynamic approach achieves effective dispersion when required while minimizing energy loss and pressure drop during normal operation
Solution Approach 2:
The system changes the flow regime parameter dynamically by deploying the wings or blades only during injection operations. This allows the system to maintain laminar or low-turbulence flow during normal operation (minimizing pressure drop) while transitioning to high-turbulence flow when dispersion is needed
3Adaptability or versatility
If the blade or barrier diameter is increased to fit through limited access points, then the adaptability to access points improves, but the turbulence generation capability becomes insufficient
Solution Approach 1:
The blade or barrier is designed with movable wings or blades that can expand or rotate to a larger diameter after passing through the limited access point. This dynamic expansion allows the system to adapt to small access points while still generating sufficient turbulence for effective dispersion
Solution Approach 2:
The movable wings or blades are nested within the shroud or lance body during insertion, allowing the entire assembly to pass through limited access points. Once in position, the wings or blades can be deployed outward to create a larger effective diameter for turbulence generation
4Productivity
If multiple lance systems are installed to maximize treatment efficiency, then the productivity improves, but the device complexity and cost increase
Solution Approach 1:
The enhanced lance assembly with movable wings or blades serves multiple functions: it provides effective dispersion, creates turbulence zones larger than the access point, and can be positioned at various locations in the ductwork. This multi-functionality reduces the need for multiple separate lance systems, thereby lowering overall complexity and cost
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
Enhances the dispersion and mixing of sorbent particles in the fluid stream, improving treatment efficiency while minimizing pressure drop and reducing the need for multiple lance systems and structures.
Implementation Method 1
creates a higher degree of turbulence and dispersion of a treating agent into a fluid stream
Data Source
AI summary
The system and method for preventing air leakage from the process side to the bearing side of a mill. The system includes a labyrinth seal ring comprising a series of knives defining first and second labyrinth paths from an air inlet to the process side and the bearing side of the system, respectively. The differences in the two paths such as provided by the number of knives used in each path creates a differential pressure drop which biases air from the air inlet to the process side. The labyrinth seal thus provides a reliable and superior method for reducing the potential for particulate in the process side of the mill from damaging the bearing system.