Screen Vibration Control for Recycling Plant Overload Prevention
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Solution Overview
Problem
Existing treatment plants for recycling or disposing of construction and processing residues face significant productivity losses and require frequent manual intervention due to vibration frequency decreases and material overload issues, leading to machine downtime and increased operational costs.
Innovation Solution
A control method and system for a treatment plant that includes accelerometric sensors to measure vibration intensity, a control circuit to adjust screen rotation speed, and a conveyor belt speed controller to manage material flow, ensuring optimal vibration frequency and minimizing downtime by preventing overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the screen processes excessive amount or too large material, then the material can be handled, but the vibration frequency decreases and the screen slows down, leading to accumulation and eventual shutdown
Solution Approach 1:
The control system performs preliminary action by detecting vibration frequency changes and adjusting shaft rotation speeds before material accumulation causes shutdown. The system proactively responds to vibration decreases by increasing shaft speeds to maintain screening effectiveness, preventing the harmful effect of material accumulation and ensuring continuous operation.
Solution Approach 2:
The control system implements feedback by continuously monitoring screen vibration frequency and using this information to adjust shaft rotation speeds. When vibration frequency decreases indicating material accumulation, the system automatically increases shaft speeds to restore proper screening function, creating a closed-loop control that maintains reliable continuous operation.
2Reliability
If the shaft rotation speed is increased to maintain vibration frequency, then screening effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system applies dynamics by making shaft rotation speeds adjustable and variable rather than fixed. The control system dynamically modifies shaft speeds based on real-time vibration frequency measurements, allowing the system to adapt to changing material conditions and maintain optimal screening effectiveness while managing energy consumption through intelligent speed adjustment.
Solution Approach 2:
The control system implements parameter changes by modifying shaft rotation speeds in response to vibration frequency changes. When material accumulation causes vibration decrease, the system changes the operational parameters (shaft speeds) to restore screening effectiveness, balancing performance requirements with energy consumption through controlled parameter adjustment.
3Ease of operation
If manual intervention is provided to clear material accumulation, then the screen can be freed, but the plant must shut down and specialized personnel are required
Solution Approach 1:
The control system implements self-service by automatically detecting and responding to material accumulation conditions through vibration monitoring. The system independently adjusts shaft rotation speeds to prevent and clear accumulations without requiring manual intervention or specialized personnel, maintaining continuous plant operation and maximizing productivity through autonomous problem resolution.
4Productivity
If the plant operates continuously without shutdown, then productivity is maximized, but material accumulation and overload issues cause vibration frequency decreases
Solution Approach 1:
The control system ensures continuity of useful action by continuously monitoring vibration frequency and automatically adjusting shaft speeds to maintain effective screening operation. This prevents material accumulation from causing shutdowns, allowing the plant to operate continuously at maximum productivity while maintaining stable vibration frequencies through real-time control adjustments.
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 increases plant productivity by reducing machine downtime and minimizing the need for specialized personnel, thereby lowering operational costs and maintaining efficient processing.
Implementation Method 1
said screen comprising also: one or more accelerometric sensors for measuring the vibration intensity of said screen
Data Source
Figure 1~2
Figure 3
AI summary
A control method of a treatment plant (1) for elements to be recycled or disposed of, comprising a crushing roll (2) for a reduction in size of the elements to be recycled or disposed of and a screen (4) provided with one or more rotary shafts (6) for the generation of its vibration and operatively arranged upstream of the crushing roll (2) to allow passage to the crushing roll (2) only of elements to be recycled or disposed of having a larger size than predetermined sizes. The method includes: a measuring step of the vibration intensity of the screen (4); a comparing step of the measured vibration intensity to a desired value; an increasing step of the rotation speed of the shafts (6) of the screen (4) in order to increase the vibration intensity in case the difference between the measured and desired vibration intensities exceeds a predetermined threshold value.