Pressure Filter Moisture Control via Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pressure filters lack effective process control and require significant manual intervention, leading to inefficiencies in solid-liquid separation due to changes in feed characteristics and filter media conditions, resulting in suboptimal energy consumption and output quality.
Innovation Solution
Implementing a system that measures moisture content and operating capacity of the filter cake to automatically adjust parameters such as drying time, feed amount, and pressing amount using multivariable control and model predictive control, reducing the need for manual operation and improving response to process changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual operation with recipe-based control is used, then device complexity is reduced, but manufacturing precision and output quality consistency deteriorate due to inability to respond to feed characteristics changes
Solution Approach 1:
The patent implements automated feedback control by measuring moisture content of the filter cake and using this measurement to adjust operating parameters (drying time, feed amount, pressing amount) in real-time. This closed-loop feedback system maintains output quality consistency by automatically compensating for variations in feed characteristics without requiring complex manual intervention or highly complex control systems.
Solution Approach 2:
The pressure filter system performs self-adjustment by automatically measuring its own output quality (moisture content) and self-correcting operating parameters based on these measurements. This self-service capability enables the system to maintain manufacturing precision while keeping the control system architecture relatively simple, avoiding the need for external complex control mechanisms.
2Manufacturing precision
If automated measurement and control operations are implemented, then manufacturing precision and response time improve, but device complexity increases
Solution Approach 1:
The system uses straightforward feedback control where moisture content measurements directly inform adjustments to drying time, feed amount, and pressing amount. This direct feedback approach achieves high manufacturing precision while keeping the control logic relatively simple and transparent, avoiding overly complex control architectures.
Solution Approach 2:
The patent controls quality by adjusting key operating parameters (drying time, feed amount, pressing amount) based on moisture content measurements. This parameter-based control approach achieves manufacturing precision through straightforward parameter adjustment rather than complex control mechanisms, balancing precision with system simplicity.
3Manufacturing precision
If drying time is increased to reduce moisture content, then manufacturing precision improves, but productivity and energy consumption worsen
Solution Approach 1:
The patent dynamically adjusts drying time based on real-time moisture content measurements and feed characteristics variations. Instead of using a fixed, conservative drying time that ensures quality but reduces productivity, the system adaptively optimizes drying duration, achieving manufacturing precision while minimizing unnecessary cycle time extension and energy consumption.
Solution Approach 2:
The system optimizes the drying time parameter by adjusting it according to actual moisture content measurements and feed conditions. This dynamic parameter adjustment achieves moisture content control (manufacturing precision) while avoiding excessive drying time that would reduce productivity and increase energy consumption.
4Device complexity
If manual operation is used, then device complexity is reduced, but loss of time increases due to delayed response to process changes
Solution Approach 1:
The automated feedback control system immediately detects process changes through continuous moisture content measurement and rapidly responds by adjusting operating parameters. This eliminates the delayed response inherent in manual operation while keeping the control system architecture relatively simple and transparent.
Solution Approach 2:
The patent replaces manual mechanical operation with automated measurement and control systems. This substitution eliminates human response delays while maintaining relatively simple system architecture, achieving rapid response to process changes without requiring overly complex control mechanisms.
Data Source
AI summary
Disclosed is an arrangement and method for controlling a pressure filter. The arrangement comprises the pressure filter for solid-liquid separation for producing a filter cake and a moisture analyzer for providing an indication of moisture content of the filter cake. One or more controllers may be used for utilizing the indication of moisture content to set a drying time for the solid-liquid separation.