Thimble for cyclone separator
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Solution Overview
Problem
Cyclone separators in high-temperature, corrosive environments suffer from premature thimble degradation, leading to costly and time-consuming custom replacement processes due to complex and expensive manufacturing of arcuate-shaped thimble segments.
Innovation Solution
A thimble assembly constructed from common, less expensive segments with a modular design using steel plate cores and refractory encasements, allowing for flexible installation on a wide range of cyclone units without site-specific verification, reducing manufacturing complexity and enabling pre-inventorying of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If custom-built premium thimbles are used, then manufacturing precision and reliability are improved, but manufacturing cost and lead time increase
Solution Approach 1:
The thimble is divided into multiple segments that can be manufactured separately and assembled together. This allows for standardized mass production of individual segments while maintaining the ability to create custom-sized thimbles by combining different numbers of segments, thereby reducing lead time while preserving reliability.
Solution Approach 2:
The thimble segments are designed with universal mounting brackets and standardized interfaces that allow the same segments to be used across different thimble sizes and configurations. This universal design enables inventorying of common segments while still accommodating custom requirements, reducing both lead time and manufacturing cost.
2Manufacturing precision
If custom-built premium thimbles are used, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the thimble into standardized modules, the manufacturing process can use common tooling and molds for each segment type. This reduces the cost of custom manufacturing while maintaining precision through standardized production processes that can be repeatedly applied to each segment.
Solution Approach 2:
The design allows adjustment of thimble dimensions by changing parameters such as the number of segments, segment length, or mounting bracket configuration, rather than requiring completely custom tooling for each variation. This parameter-based customization maintains manufacturing precision while reducing costs through economies of scale.
3Manufacturing precision
If arcuate-shaped segments are used, then thimble geometry accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The thimble is segmented into multiple straight or slightly curved panels that approximate a circular shape when assembled. This segmentation allows each panel to be manufactured with simpler geometry using standard tooling, while the overall circular geometry is achieved through the arrangement of multiple segments rather than requiring complex arcuate shaping of each segment.
Data Source
AI summary
A thimble assembly for a cyclone separator comprising a plurality of carrier brackets separately mountable on a shelf of the separator along the perimeter of a circular exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of row immediately above, each bracket exclusively serving a chord of an arc concentric with the circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.