Filter Press Weighing Device for Precise Cake Monitoring
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Solution Overview
Problem
Existing filter press technologies face challenges in achieving precise monitoring and optimization of filter cake formation due to variations in slurry density, requiring sensitive instrumentation that is prone to errors and maintenance issues, especially when using weighing sensors that measure the entire filter press rather than the filter cakes themselves.
Innovation Solution
A filter press design where weighing sensors are positioned between the stack of filter plates and the body, allowing only the stack of filter plates to be weighed, thereby enhancing precision and reducing horizontal forces on the sensors, enabling accurate monitoring of filter cake formation and facilitating easier maintenance and attachment to the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If weighing sensors measure the entire filter press, then the monitoring covers all components, but the measurement precision is reduced due to the large mass of the filter press body
Solution Approach 1:
The weighing measurement is segmented to measure only the stack of filter plates separately from the filter press body. The stack is designed to be movable relative to the body, allowing independent weighing of the filter plates which contain the filter cakes, thus eliminating the interference of the large filter press body mass and achieving precise measurement of filter cake formation.
2Measurement precision
If weighing sensors are positioned to measure the entire filter press, then the structure is simplified, but horizontal forces affect the sensor readings
Solution Approach 1:
The system is segmented into a stationary body and a movable stack of filter plates. The weighing sensors are positioned to measure only the movable stack, separating the measurement system from the large stationary body. This segmentation isolates the sensors from horizontal forces generated during filtration operations, ensuring accurate mass measurements of the filter cakes.
3Stability of the object's composition
If the filter press is firmly attached to the ground, then stability is improved, but weighing sensors cannot accurately measure filter cake formation
Solution Approach 1:
The filter press is segmented into a firmly ground-attached body and a movable stack of filter plates that rests on weighing sensors. The body provides stability through firm attachment, while the movable stack can be independently weighed. This segmentation allows the stable body to remain fixed while the lighter stack moves freely on the sensors, enabling accurate measurement without compromising overall stability.
Solution Approach 2:
The stack of filter plates is designed to be movable relative to the body during filtration operations. This dynamic design allows the stack to respond to filtration forces while maintaining contact with the weighing sensors, enabling continuous mass measurement. The movability ensures the stack remains in equilibrium on the sensors without requiring firm ground attachment of the entire filter press.
4Reliability
If weighing sensors measure the entire filter press, then comprehensive monitoring is achieved, but maintenance becomes more difficult
Solution Approach 1:
The weighing system is segmented to measure only the movable stack of filter plates rather than the entire filter press. This segmentation isolates the weighing sensors to a specific, accessible location where they can easily support the movable stack. The sensors are positioned in a maintenance-friendly environment separate from the large, complex filter press body, making inspection, calibration, and repair of the weighing sensors significantly easier while maintaining reliable monitoring of filter cake formation.
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 approach provides more precise monitoring of filter cake formation, reduces the load on weighing sensors, and simplifies maintenance and attachment, leading to improved filtration results and cost-effectiveness compared to traditional methods.
Implementation Method 1
a weighing device (30) disposed between the body (11) and the stack of filter plates (20) for supporting and carrying the weight of said stack of filter plates (20)
Implementation Method 2
The pressing is applied in a horizontal direction. The vertical plates and filter cloth adhere to each other and form watertight filtration chambers
Implementation Method 3
Slurry is pumped to the filtration chambers with high pressure
Implementation Method 4
solid part of the slurry is retained in the filtration chambers to form filter cakes. The liquid part of the slurry passes through the filter cloth
Implementation Method 5
apply membrane pressure, in which pressure medium is conducted to a space between flexible membranes and the bodies of filter plates to compress the membranes such that they swell and remove liquid from the filter cake
Implementation Method 6
compressed air is passed through the filter cakes to reduce the moisture content of the filter cakes
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a filter press (1) comprising a body (11) and a stack of filter plates (20). The filter press (1) further comprises a weighing device (30) disposed between the body and the stack of filter plates (20) for supporting and carrying the weight of said stack of filter plates (20). The invention also relates to a body (11) for supporting a stack of filter plates (20) comprising plurality of filtering plates (21). The body (11) comprises a weighing device (30) for weighing the stack of filter plates (20). And further the invention relates to an arrangement in a filter press (1), said filter press (1) comprising a stack of filter plates (20) comprising plurality of filtering plates (21) arranged side by side in the stack of filter plates (20) and a body (11) for supporting said stack of filter plates (20). The stack of filter plates (20) and the body (11) are in connection to each other through a weighing device (30) for weighing the stack of filter plates (20).