Pressurized Container Outlet Flow Centering to Reduce Wear
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Solution Overview
Problem
Current valve systems, such as gate-valves and ball-valves, face issues with wear and plugging when handling abrasive and hot materials during evacuation from pressurized processing containers, leading to maintenance and repair costs due to uneven flow and abrasive wear.
Innovation Solution
A biomass treatment system with a pressurized processing container and an outlet flow control arrangement featuring a rotatable disc with bores of varying sizes to center and control the flow of material, reducing wear and plugging by ensuring a centralized and adaptable flow through the use of an adaptor unit with a cylindrical or tapered bore configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gate-valve is used to control flow, then flow control is achieved, but larger particles are trapped due to plugging while smaller particles escape
Solution Approach 1:
The gate valve is segmented into multiple parallel flow paths with different opening sizes. The first flow path has a larger opening for larger particles, while the second flow path has a smaller opening for smaller particles. This segmentation allows simultaneous passage of particles of different sizes without plugging, while still enabling flow control through selective opening/closing of each path.
2Ease of operation
If a ball valve is used to control flow, then flow control is achieved, but severe wear and possible puncture of pipe walls occurs due to spraying flow
Solution Approach 1:
The valve structure is designed with localized flow control features where the first and second flow paths are positioned to direct flow in specific patterns. The larger opening in the first flow path allows centralized flow for larger particles, while the smaller opening in the second flow path provides controlled flow for smaller particles. This local quality differentiation eliminates the spraying effect that causes wear on pipe walls.
3Device complexity
If a simple outlet is used for material evacuation, then device complexity is low, but wear and plugging problems occur with abrasive hot material
Solution Approach 1:
The outlet is segmented into multiple parallel flow paths with different opening characteristics. The first flow path with larger opening handles larger abrasive particles, while the second flow path with smaller opening handles finer particles. This segmentation prevents plugging while reducing wear by distributing flow appropriately across different particle sizes, achieving reliable evacuation without excessive complexity.
Data Source
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AI summary
In an outlet flow control arrangement (1) arrangeable to control a flow of material through an outlet (2) with a predetermined diameter arranged at an end of a pressurized processing container (3), the outlet flow control arrangement (1) comprises an adaptor unit (4) configured so that a cross- section of a flow into the adaptor unit (4) is reduced as compared to a cross- section of the outlet (2), to enable the adaptor unit (4) to control and center a flow of processed material out of the processing container (3) and through the outlet (2) into a discharge pipe (5).