Rotary Disk Filter Modular Replacement and Spindle Protection
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Solution Overview
Problem
Existing rotary disk filters face challenges in efficiently connecting and maintaining filter modules, requiring the replacement of entire modules when one filter surface is damaged, and lack a secure and efficient method to prevent oxidation of threaded spindles during operation.
Innovation Solution
The rotary disk filter employs threaded spindles extending radially through filter modules, allowing for independent fixation to the central pipe with nuts, and detachable clip or screw connections between filter frames, enabling modular replacement and preventing spindle oxidation through internal guides and seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If filter modules are connected to the central pipe with screw connections in the contact area, then the filter modules are securely fixed, but the entire filter module must be replaced when one filter surface is damaged
Solution Approach 1:
The filter module is segmented into a base frame and detachable filter elements. Each filter element can be independently removed from the base frame, allowing replacement of only the damaged filter surface rather than the entire filter module. This segmentation enables selective maintenance while preserving the overall module structure.
Solution Approach 2:
The connection structure is localized to specific areas: the base frame has connection elements at predetermined positions that engage with corresponding elements on the filter elements. This localized connection approach provides secure fixation while enabling easy disassembly and reassembly of individual filter elements.
2Ease of operation
If threaded spindles extend through filter modules for fixation, then independent fixation to the central pipe is enabled, but oxidation of threaded spindles occurs during operation
Solution Approach 1:
A seal element is introduced as an intermediary component between the threaded spindle and the wastewater environment. This seal element prevents direct contact between the spindle and corrosive liquid, thereby preventing oxidation while maintaining the functional connection. The seal acts as a protective barrier that preserves spindle durability.
3Productivity
If filter modules are tightly connected to reduce scooping effect, then fluid-tight sealing is improved, but assembly and maintenance difficulty increases
Solution Approach 1:
The filter elements are pre-assembled with the base frame using detachable connections before being mounted on the filter disk. This preliminary assembly with easy detachment features allows for simple maintenance operations while maintaining the tight sealing required for efficient filtration during operation.
Data Source
AI summary
A rotary disk filter has a central pipe and multiple filter disks arranged around and connected to the central pipe., wherein each filter disk includes multiple filter modules arranged adjacent to one another in the circumferential direction of the central pipe, each having a base frame and two filter elements, which include a filter surface connected to a filter frame. The base frame and the two filter elements delimit a cavity fluidically connected to the central pipe. The filter frames are detachably connected to both sides of the base frame, and removable from the base frame and replaceable with new filter elements. Each filter module is fixed at the central pipe with a threaded spindle independently of the remaining filter modules, wherein the threaded spindle extends through the filter module in the radial direction with respect to the central pipe.