Rotary Disc Filter Bag Reinforcement to Prevent Cloth Slippage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The filter cloth in existing rotary disc filters can slip relative to the support frame during operation, leading to potential bypass of wastewater and contamination of the filtrate.
Innovation Solution
A filter bag with a reinforcement at the mounting opening, designed to securely fix the filter bag to the support frame using a clamping strip and additional features like a thicker material edge or wire reinforcement, ensuring stable attachment and preventing slippage during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the filter cloth is simply placed over the support frame and fixed by clamps, then the assembly is simple and easy to manufacture, but the filter cloth can slip relative to the support frame during operation, causing wastewater to bypass the filter surface and contaminate the filtrate
Solution Approach 1:
The filter cloth is folded over the support frame edges before operation, creating preliminary mechanical interlocking. This preliminary action of folding and tucking the filter cloth over the frame edges prevents slippage during operation while maintaining simple assembly procedures.
Solution Approach 2:
The solution moves from a two-dimensional planar attachment (clamps on flat surfaces) to a three-dimensional spatial arrangement where the filter cloth is folded over and around the frame edges. This dimensional change creates mechanical interlocking that prevents slippage while keeping the assembly simple.
2Reliability
If the filter cloth is securely fixed to prevent slippage, then the filtration reliability is improved, but the assembly complexity and manufacturing difficulty increase
Solution Approach 1:
The filter cloth itself serves as the securing mechanism through its own material properties. By folding the filter cloth over the frame edges, the cloth's tension and flexibility create self-securing attachment without requiring additional complex fastening systems, thereby maintaining reliability while minimizing assembly complexity.
Solution Approach 2:
The filter cloth, as a flexible thin film, is utilized to its full potential by folding it over the rigid frame edges. This creates a flexible-rigid-flexible sandwich structure that secures the filter cloth reliably through simple geometric arrangement rather than complex mechanical fasteners.
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 effectively prevents slippage of the filter bag, maintaining the integrity of the filtration process and ensuring that wastewater is properly filtered without contaminating the filtrate.
Implementation Method 1
When the wastewater to be treated is introduced into the container, it flows from the outside through the filter surface of the individual filter modules, into the interior of the filter modules, and from there into the central tube. Solids present in the wastewater are retained by the filter surface of the filter modules
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a filter bag (1) for a rotary disc filter, which serves to filter wastewater, wherein the filter bag (1) has a filter material (2) with a mounting opening (3) through which the filter bag (1) can be placed over a support frame (4) of the rotary disc filter during an assembly step to form a filter module (5), wherein the filter material (2) has an outlet opening (6), preferably opposite the mounting opening (3), which in the intended use of the filter bag (1) serves to allow filtrate to escape from the interior of the filter module (5) into a central tube (7) of the rotary disc filter after the filter module (5) has been connected to the central tube (7). According to the invention, a reinforcement (26), in particular connected with the filter material (2), is arranged in the area of an edge (8) limiting the mounting opening (3), which serves to fix the filter bag (1) to the support frame (4).Furthermore, a filter module (5) and a rotary disk filter are described.