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 geometry and large exposed metal areas, which complicates manufacturing and inventory management.
Innovation Solution
A modular thimble assembly using common, less expensive segments with refractory-covered steel plate cores and innovative mounting brackets, allowing for flexible installation on a wide range of cyclone sizes without site-specific verification, reducing manufacturing complexity and enabling pre-inventory production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If custom-built premium thimbles are manufactured for specific installations, then the thimble fits the separator unit perfectly, but manufacturing costs increase and delivery time extends
Solution Approach 1:
The thimble is divided into multiple segments that can be manufactured separately and assembled on-site. Each segment is made with standardized geometry (flat plates rather than complex arcuate shapes) that can be produced efficiently, while the segmented design allows the thimble to adapt to different separator sizes without requiring custom manufacturing for each installation.
Solution Approach 2:
The thimble segments are designed with universal mounting brackets and standardized dimensions that allow the same segment design to be used across multiple separator sizes. The segments can be configured in different arrangements to fit various cyclone separator diameters, eliminating the need for custom-built thimbles for each specific installation.
2Stability of the object's composition
If thimble segments are made with arcuate shapes to match cyclone geometry, then the thimble fits the separator unit, but manufacturing complexity and cost increase
Solution Approach 1:
The thimble is divided into multiple segments that can be manufactured separately and assembled on-site. Each segment is made with standardized geometry (flat plates rather than complex arcuate shapes) that can be produced efficiently, while the segmented design allows the thimble to adapt to different separator sizes without requiring custom manufacturing for each installation.
3Device complexity
If large exposed metal areas are used in thimble design, then the thimble structure is simple, but degradation rate increases in corrosive environments
Solution Approach 1:
The thimble segments incorporate refractory material applied to the inner surfaces that are exposed to corrosive materials. This creates different material properties in different locations: the outer structure remains simple metal segments for structural integrity, while the inner surfaces have refractory coating for corrosion resistance, thus protecting against degradation in harsh environments.
4Reliability
If premium materials are used for thimble construction, then the thimble resists degradation longer, but manufacturing cost increases
Solution Approach 1:
The thimble segments incorporate refractory material applied to the inner surfaces that are exposed to corrosive materials. This creates different material properties in different locations: the outer structure remains simple metal segments for structural integrity, while the inner surfaces have refractory coating for corrosion resistance, thus protecting against degradation in harsh environments.
Solution Approach 2:
The thimble is designed as a replaceable component with standardized segments that can be manufactured at lower cost using common materials and processes. Rather than using expensive premium materials throughout, the design accepts that the thimble will need replacement but makes the replacement process more economical through standardized, easily manufactured segments.
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 reduces production costs, extends thimble lifespan, eliminates the need for custom design and site visits, and streamlines the replacement process by using standardized parts that can be easily assembled and adapted to various cyclone sizes, thereby improving efficiency and reducing lead times.
Implementation Method 1
The thimble (which can also be referred to as a central tube, a vortex finder or a dip tube) is adjacent the outlet and extends from the shelf axially in the cyclone housing to a distal free open end. The thimble forces the incoming suspension to rotate around the outside of the cyclone creating rotation and a vortex in the center of the cyclone
Implementation Method 2
Cyclone separators are used in different applications where solid particulates suspended in a gas phase are to be separated from the gas phase
Implementation Method 3
Cyclone separators are used in different applications where solid particulates suspended in a gas phase are to be separated from the gas phase
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 a 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.