Turbidity Sensing Filter Plate for Cloth Damage Detection
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Solution Overview
Problem
Conventional filter presses require extensive and costly maintenance to detect damaged filter cloths, leading to inefficient operation and premature cloth replacement, which affects production efficiency and profitability due to the time-consuming process of visually inspecting numerous filter plates.
Innovation Solution
Integration of turbidity sensing modules with optical emitters and detectors between filter plate assemblies to monitor filtrate turbidity independently, triggering alarms when threshold levels are reached, allowing for real-time identification of cloth damage without disassembling the filter press.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual inspection of filter cloths is performed manually, then damaged cloths can be detected, but the process becomes extremely time-consuming and labor-intensive with hundreds of filter plates
Solution Approach 1:
The patent replaces manual visual inspection with an automated optical detection system. Turbidity sensors mounted on the filter press frame continuously monitor the clarity of filtrate passing through each filter plate, automatically detecting cloth damage without human intervention. This substitution of mechanical/manual inspection with an automated sensing system resolves the contradiction by maintaining reliable damage detection while eliminating time-consuming manual inspection.
Solution Approach 2:
The patent introduces turbidity sensors as an intermediary between the filter cloths and the inspection process. Instead of directly observing filter cloths, the system monitors the turbidity of filtrate as an indirect indicator of cloth integrity. When filtrate becomes turbid, it indicates cloth damage upstream. This intermediary measurement approach enables automatic, continuous monitoring without requiring direct access to or manual inspection of each filter cloth.
2Reliability
If all filter cloths are replaced simultaneously at scheduled intervals, then the risk of operational failure is reduced, but production time is lost and costs increase due to replacing still-serviceable cloths
Solution Approach 1:
The patent implements preliminary detection of filter cloth degradation through continuous turbidity monitoring. The system detects cloth damage at the moment it occurs, allowing operators to replace only the affected cloths immediately rather than waiting for scheduled maintenance. This preliminary detection capability enables condition-based maintenance, replacing filter cloths based on actual need rather than predetermined time intervals, thus maintaining reliability while maximizing production efficiency.
Solution Approach 2:
The patent establishes a feedback loop where turbidity sensors continuously monitor filtrate quality and provide real-time information about filter cloth performance. When turbidity exceeds thresholds, the system alerts operators to specific problematic filter plates. This feedback mechanism replaces the open-loop scheduled replacement approach with a closed-loop condition-based maintenance system, enabling timely intervention only when necessary and eliminating unnecessary replacements of serviceable cloths.
3Productivity
If filter presses operate with damaged filter cloths, then production continues, but turbidity in filtrate increases and downstream processes are negatively affected
Solution Approach 1:
The patent uses turbidity sensors to create a real-time feedback system that monitors filtrate quality and immediately detects when filter cloths become damaged. When turbidity exceeds predetermined thresholds, the system generates alerts indicating which specific filter plates require attention. This feedback enables operators to maintain production continuity by quickly identifying and addressing only the problematic filter cloths, preventing widespread quality issues while minimizing production interruptions.
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 solution enables real-time monitoring of filter cloth performance, reducing unnecessary replacements, minimizing maintenance time, and maximizing production efficiency by identifying damaged cloths promptly, thus optimizing filter operation and reducing labor and maintenance costs.
Implementation Method 1
The optical detector is configured to measure an intensity of light transmitted through the stream of filtrate
Implementation Method 2
determining, by the amount of electromagnetic radiation received by the at least one optical detector, a turbidity level of the filtrate
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A filter press having a plurality of stackable filter plate assemblies comprises at least one turbidity sensing module [20, 220, 320, 420] coupled to a first filter plate assembly [1] within the plurality of stackable filter plate assemblies. The turbidity sensing module [20, 220, 320, 420] is generally positioned between a filtrate drain opening [8a-d] communicating with a filter chamber [14], and either a filtrate port [7, 13] or filtrate discharge tube [4g, 15], in order to determine a level of turbidity of filtrate [50] exiting said first filter plate assembly. Turbidity levels may be determined independently of turbidity levels of filtrate [50] exiting other filter plate assemblies [1] within the filter press. When turbidity levels reach a predetermined threshold, and alarm [80] is activated, which informs an operator of the need to replace a filter cloth associated with the affected filter plate assembly [1].