Cyclone Separator Supporting Element Thermal Stress Reduction
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Solution Overview
Problem
Cyclone separators used in high-temperature applications, such as cement manufacture, face significant thermal stress due to radial temperature gradients in the supporting elements, which can lead to structural damage and risk of collapse from excessive heat transmission between the central tube and the cyclone housing/discharge duct.
Innovation Solution
The cyclone separator design reduces heat transmission by minimizing the contact area between the supporting element and the cyclone housing/discharge duct, using shelf brackets and an annular disc with a reduced contact area and a heat-insulating layer, and dividing the upwardly protruding flange to distribute thermal stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the supporting element has a large contact area with the cyclone housing and discharge duct, then the structural stability is improved, but the heat transmission increases causing significant thermal stress
Solution Approach 1:
The supporting element is divided into multiple segments (first supporting segment, second supporting segment, etc.) that are distributed around the central tube. This segmentation reduces the continuous contact area while maintaining structural support, thereby reducing heat transmission and thermal stress while preserving stability.
Solution Approach 2:
The supporting elements are strategically positioned at specific locations (e.g., at angles of approximately 45°, 135°, 225°, and 315°) around the central tube. This localized placement optimizes the distribution of support while minimizing the total contact area, reducing thermal stress concentration in any single region.
2Object-affected harmful factors
If the contact area between the supporting element and cyclone housing is reduced, then the thermal stress is reduced, but the structural support capability may be compromised
Solution Approach 1:
The supporting element is divided into multiple segments that collectively provide structural support. While each segment has a smaller contact area, the cumulative effect of multiple segments distributed around the central tube maintains adequate structural support capability while reducing localized thermal stress.
Solution Approach 2:
The supporting elements extend in the axial direction (vertical dimension) in addition to providing radial support. This multi-dimensional configuration allows the supporting elements to distribute loads more effectively while maintaining reduced contact area, thus preserving structural support capability without requiring large contact surfaces.
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
This design achieves a uniform temperature across the radial cross-section of the supporting element, significantly reducing thermal stresses and preventing structural damage from excessive heat, ensuring the cyclone separator's integrity in high-temperature environments.
Implementation Method 1
The annular disc is provided with a heat-insulating layer on its upper side in order to reduce the heat transmission from the central tube
Implementation Method 2
a significant reduction in the heat transmission from the supporting element to the cyclone housing and/or the discharge duct so that the radial temperature gradient in the supporting element is reduced
Data Source
Figure 1~2
AI summary
Described is a cyclone separator comprising a cyclone housing (1), a discharge duct (5) and a central tube (3) for diverting gases, said central tube (3) extends axially into the cyclone housing (1) and being composed by a number of segments (3a) which are suspended on a supporting element (15) provided in the area between the cyclone housing (1) and the discharge duct (5). The cyclone separator is peculiar in that it comprises a number of carrying means (17) which are evenly distributed and fixed to the inner side of the cyclone housing (1) and/or the discharge duct (5), and in that the supporting element (15) comprises an annular disc which is loosely fitted on top of the carrying means (17) and having an outer diameter which is smaller than the inner diameter of the cyclone housing (1) and/or the discharge duct (5) so that a clearance (18) is provided between the annular disc (15) and the cyclone housing (1) and/or the discharge duct (5). Hereby is obtained a significant reduction in the heat transmission from the supporting element to the cyclone housing and/or the discharge duct so that the radial temperature gradient in the supporting element is reduced with an approximately uniform temperature over the radial cross section of the element. Hence the thermal stresses in the supporting element will be substantially reduced. This is mainly ascribable to the reduction in the contact area between the supporting element and the cyclone housing and/or the discharge duct.