Filter-Press Cloth Damage Detection via Filtrate Turbidity
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Solution Overview
Problem
Conventional filter-press filter-cloth damage detection methods are inefficient, requiring multiple turbidity meters or detection rods, which are costly and prone to failure, and often necessitate visual inspection, making it difficult to accurately determine which filter cloth is damaged during operation.
Innovation Solution
A filter-press filter-cloth damage detection device that uses a detection path and a detection device to transmit irradiation waves or pulses along a collection pipe, measuring the propagation time to detect the interface between clear and turbid filtrate, allowing for accurate identification of damaged filter cloths without the need for multiple instruments or visual inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple turbidity meters are provided for each filtration chamber, then detection accuracy is improved, but device cost and complexity increase
Solution Approach 1:
The patent combines multiple detection functions into a single turbidity meter by collecting filtrate from all filtration chambers into one common collection pipe. This single instrument can detect damage in any filter cloth by measuring turbidity at different time points, eliminating the need for multiple separate detectors while maintaining detection accuracy.
Solution Approach 2:
The single turbidity meter serves multiple functions: it detects damage in any of the multiple filtration chambers, identifies the specific location of damage through timing, and monitors the overall filtration system performance. This multi-functional approach replaces what would traditionally require multiple specialized instruments.
2Device complexity
If visual inspection is used to determine damaged filter cloth, then device complexity is reduced, but detection time increases
Solution Approach 1:
The patent replaces manual visual inspection with an automated optical detection system. The turbidity meter automatically measures filtrate clarity and the control unit processes timing data to identify damaged filter cloths, eliminating the need for operators to manually inspect each chamber while significantly reducing detection time.
Solution Approach 2:
The system provides immediate feedback through automated detection and identification of damaged filter cloths. The control unit receives timing data from the turbidity meter and automatically determines which specific filter cloth is damaged, providing real-time information without requiring manual inspection of each chamber.
3Device complexity
If three-way valves are used to switch filtrate for single turbidity meter measurement, then device cost is reduced, but operational complexity and time increase
Solution Approach 1:
The patent extracts the valve switching mechanism from the system entirely. Instead of using three-way valves to redirect filtrate to a single detection point, the design collects filtrate from all chambers into a common collection pipe where a single turbidity meter continuously monitors all streams simultaneously, eliminating the need for manual or automated valve operations.
4Measurement precision
If detection rod protrusion method is used, then detection capability is improved, but device cost and reliability worsen
Solution Approach 1:
The patent replaces the mechanical detection rod protrusion system with an optical detection method using a turbidity meter. Instead of relying on mechanical rods that can fail, wear, or malfunction, the system uses optical measurement of filtrate turbidity, which is more reliable and requires no moving parts in the harsh filtration environment.
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
Enables high-accuracy detection of filter cloth damage and determination of the affected chamber without stopping the filter press or switching filtrate, reducing operational downtime and environmental impact by accurately identifying damaged cloths using a single measuring instrument.
Implementation Method 1
transmit, from an end portion of the detection path, an irradiation wave or a pulse that reflects on an interface between a clear filtrate and a filtrate with a prescribed turbidity
Implementation Method 2
convert a propagation time from the transmission until reception of a reflected wave into a distance
Data Source
AI summary
A filter-press filter-cloth damage detection device for a filter press includes a detection path and a detection device. In the filter press, a filtrate produced by solid-liquid separation operation of a filter cloth nipped between filter plates is discharged into a collection pipe via a filtrate passage of each of the filter plates. The detection path extends in a straight line. A filtrate discharged from each of filtration chambers formed between adjacent filter plates is collected to the detection path. The detection device is configured to transmit, from an end portion of the detection path, an irradiation wave or a pulse that reflects on an interface between a clear filtrate and a filtrate with a prescribed turbidity, convert a propagation time from the transmission until reception of a reflected wave into a distance, and output the distance.