Temperature measurement in the glass industry: precise control throughout production
Precise temperature measurement is essential for quality, energy efficiency and safety in glass production. Infrared temperature measurement allows critical areas to be monitored without physical contact, from the moment the batch enters the furnace until the glass is melted and processed.
Temperature affects glass quality
Glass can be shaped, toughened, coloured, laminated and treated to meet various technical and visual requirements. Throughout the process, temperature influences the properties and quality of the finished product.
Inaccurate or incomplete measurements can make it harder to detect deviations, impurities and problems in the production plant. Reliable temperature monitoring therefore gives operators a better basis for controlling the process and responding before a deviation affects larger quantities of glass.
Infrared temperature measurement at high temperatures
Temperatures in glass production can be so high that traditional contact sensors are impractical. Infrared measuring instruments record the temperature from a distance and therefore do not come into direct contact with the hot material.
Non-contact measurement makes it possible to monitor glass, furnaces and production equipment safely and accurately. Measurements can also be taken continuously, allowing temperature changes to be tracked in real time.
In the production of container glass for bottles, jars and other items, precise measurements at critical points help ensure consistent quality throughout the process.
Critical measurement points in glass production
The relevant measurement points depend on the production plant and the type of glass being manufactured. In container glass production, it is particularly important to monitor the batch, melting tank and regenerators.
- Batch: The batch is a sand-based mixture of minerals that is melted in the furnace. Temperature measurement at the furnace entrance confirms that the batch is heating up and melting as expected.
- Impurities: Monitoring the batch can help detect impurities that may affect the quality of the finished glass.
- Melting tank: The highest temperatures occur in the melting tank. Real-time monitoring supports an efficient process and consistent glass quality.
- Tank structure: Thermal measurements can identify structural damage and areas of abnormal thermal stress before they develop further.
- Regenerators: Temperature measurement supports efficient heat transfer and can provide an early warning of incorrect or unbalanced firing.
- Flue gas: Emissions from the combustion process must be monitored and controlled to support compliance with applicable environmental requirements.
- Annealing and cooling: Controlled temperature monitoring helps ensure that the glass cools evenly and achieves the desired properties.
Better energy efficiency and less downtime
Real-time monitoring makes it possible to detect temperature deviations and damage at an early stage. This allows the process to be adjusted or maintenance to be planned before the problem leads to quality defects or unplanned production stoppages.
Monitoring the melting tank and regenerators can also contribute to more efficient energy use. Unbalanced firing or damage to the plant can increase energy consumption and affect glass quality.
Hans Buch offers measurement solutions from AMETEK Land for the glass industry. The solution is tailored to the specific temperatures, measurement points and conditions in the production plant.
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