Inductor Drying Apparatus with Direct Heating and Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for drying inductors in rolling plants are inefficient, requiring long downtimes, inadequate temperature control, and high energy consumption, with risks of damaging the refractory material and incomplete drying.
Innovation Solution
An apparatus and method for drying inductors outside the rolling line, using a heating device with temperature control sensors and a control unit to regulate the drying cycle, ensuring precise temperature management and complete drying of refractory material without indirect temperature monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inductor is dried using the state of the art method by installing it along the rolling line and making a hot billet pendulate inside it, then the drying treatment can be performed, but the machine downtime of the rolling line increases significantly (20-30 hours)
Solution Approach 1:
The drying treatment is extracted from the rolling line environment and performed in a dedicated drying facility. The inductor is removed from the rolling line and placed in a controlled drying chamber where heating elements can directly heat the refractory material without requiring billet pendulation, thus eliminating the need for rolling line downtime.
Solution Approach 2:
The drying treatment is performed as a preliminary action before the inductor is installed on the rolling line. By completing the drying process in advance in a dedicated facility with precise temperature control, the inductor is fully dried before deployment, eliminating the need for extended drying periods that would halt production.
2Ease of operation
If the drying treatment is performed by indirect temperature monitoring using a thermal imaging camera on the billet, then the process can be monitored, but the temperature control precision is insufficient
Solution Approach 1:
A feedback control system with multiple temperature sensors is implemented to continuously monitor the temperature of the refractory material at various locations. The sensors provide real-time temperature data to a control unit that automatically adjusts the heating power to maintain the desired temperature profile, ensuring precise temperature control throughout the drying process.
Solution Approach 2:
The indirect optical measurement method (thermal imaging camera) is replaced with direct thermal contact measurement using temperature sensors embedded in or attached to the refractory material. This substitution provides accurate, direct temperature readings of the refractory material itself rather than inferring temperature from billet surface observations.
3Reliability
If the inductor is dried by making a billet oscillate for 24-28 hours, then the drying treatment can be completed, but the risk of blocking and melting the billet increases
Solution Approach 1:
The billet is extracted from the drying process entirely. Instead of using a billet as the heating medium, the drying facility uses dedicated heating elements that directly heat the refractory material. This eliminates all risks associated with billet blocking, melting, or damage while completing the drying treatment.
Solution Approach 2:
Dedicated heating elements serve as an intermediary between the power source and the refractory material. These heating elements directly transfer thermal energy to the refractory material without requiring a billet as an intermediate heat transfer medium, thereby eliminating the harmful effects of billet blocking and melting while achieving complete drying.
4Reliability
If the inductor is dried using multiple forward and backward displacements of the billet, then the drying treatment can be performed, but the operational complexity and costs increase
Solution Approach 1:
The complex billet displacement operations are extracted and replaced by a stationary heating system. The inductor remains fixed in the drying facility while heating elements move along its length or heat it uniformly, eliminating the need for repeated forward and backward billet movements and associated operational complexity.
Solution Approach 2:
The system transitions from dynamic billet displacement (requiring repeated movement operations) to a static inductor position with dynamic heating. The heating elements can move along the inductor length or the heating intensity can be dynamically adjusted at different locations, achieving uniform drying without mechanical displacement of the heavy inductor or billet.
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
Reduces machine downtimes, allows effective temperature control of refractory material, lowers energy consumption, and ensures complete and homogeneous drying of the inductor, reducing the risk of damage and costs.
Implementation Method 1
a heating device (20) having an oblong development along a longitudinal axis and configured to be located, during use, inside the transit channel of the inductor
Implementation Method 2
a control and command unit (31) configured to command the supply devices (28) and regulate the functioning of the heating device (20) according to a predefined program
Data Source
AI summary
An apparatus for the off-line drying treatment, or dry out, of an inductor for billets that includes a coil and a protection body made of refractory material that defines a transit channel for the billets.