Boiler Spreader Nozzle Virtual Rotation Mechanism
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Solution Overview
Problem
In soda boilers and other combustion equipment, the existing spreader nozzles face challenges due to the corrosive and rapidly changing atmosphere, leading to short equipment lifetimes and difficulties in maintaining precise positioning, which affects the efficiency and safety of the combustion process.
Innovation Solution
A spreader nozzle system that can be rotated around a virtual center of rotation within the boiler wall, maintaining a fixed distance to the wall and allowing for precise angular positioning, reducing splashing and chemical/thermal attack, and enabling smaller boiler wall openings for installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the spreader nozzle is rotated around a pivot outside the reactor wall, then the angular position of the spreader nozzle can be changed, but the distance from the nozzle to the wall changes significantly and protection of the spreader becomes difficult
Solution Approach 1:
The invention changes the rotation mechanism from external pivot rotation to internal virtual center rotation. The spreader nozzle rotates around a virtual center located inside the reactor wall rather than around an external pivot, which keeps the nozzle at a substantially constant distance from the wall throughout rotation. This dimensional change in the rotation reference point resolves the contradiction by maintaining both angular adjustability and constant wall distance for protection.
Solution Approach 2:
The invention uses a virtual center of rotation as a conceptual copy or representation of the rotation reference point, rather than requiring a physical pivot outside the wall. This virtual center allows the spreader to rotate while maintaining constant distance from the wall, eliminating the need for complex external protection mechanisms and significantly improving spreader reliability and lifetime.
2Ease of manufacture
If the spreader nozzle is positioned closer to the furnace wall, then the opening in the wall can be smaller, but the risk of chemical and thermal attack increases
Solution Approach 1:
By changing the rotation reference to a virtual center inside the wall, the invention enables the nozzle to maintain a substantially constant, optimized distance from the wall during rotation. This allows the nozzle to be positioned closer to the wall (reducing opening size) while the virtual rotation mechanism ensures it doesn't come too close during angular adjustment, balancing manufacturing ease with protection from harmful factors.
3Adaptability or versatility
If the spreader nozzle is rotated around an external pivot, then angular adjustment is possible, but the region within which the nozzle moves becomes large causing deviations from ideal positioning
Solution Approach 1:
The invention relocates the rotation reference from an external pivot to a virtual center inside the reactor wall. This dimensional change in the rotation reference point dramatically reduces the arc of rotation and keeps the nozzle within a small, well-defined region close to the ideal positioning point, thereby maintaining high positioning precision while still enabling angular adjustment for different operating conditions.
4Reliability
If the spreader nozzle is positioned far from the wall, then protection from chemical attack is improved, but the opening in the boiler wall must be larger
Solution Approach 1:
By implementing rotation around a virtual center inside the wall rather than an external pivot, the invention allows the nozzle to be positioned at an optimized distance from the wall. The virtual rotation mechanism ensures the nozzle maintains this optimized distance throughout its angular range, enabling smaller wall openings while preserving adequate protection from chemical and thermal attack.
Data Source
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AI summary
The invention concerns an arrangement for positioning equipment in association with an opening in a boiler wall. The arrangement comprises a rotation mechanism (26, 34, 35) that rotates the equipment around a virtual rotation axis (27) that lies within the outer wall (8) of the boiler. It is preferable that the rotation mechanism is designed as a guide that has the form of an arc, either in the form of a guide track (26) that has the form of an arc or as a guide beam that has the form of an arc, arranged at a distance from the opening of the boiler, where the guide that has the form of an arc has its centre at the virtual rotation axis. The second part of the rotation mechanism is provided with glide means (34, 35) that run in the guide. During the use of a liquor spreader (2) for the introduction of combustible material, the opening (12) of the liquor spreader can be arranged in this virtual centre of rotation (27) whereby the point at which the combustible material is introduced can be retained constant independently of the angle of rotation. The liquor spreader (2) is united either with the glide means (34, 35/34b, 35b) or the guide (26/26b) in the rotation mechanism, and the second part is attached to a fixed bracket (20/2Ob).