Thermal imaging cameras can effectively detect any uncooled areas within the coke and identify potential hot spots. Continuous temperature monitoring of the coke on the conveyor ensures rapid response to hot spots thereby protecting the conveyor belt from damage and reduces fire risk from hot inclusions reigniting coke. |
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Fire Safty of running Sinter on Conveyor Belt
Pilger mill in tube rolling mills - hot and cold pipe detection
Online continuous monitoring of running Sinter
- Improved safety level: Prevents fire and reduces risk of damage
- Enables Preventive Maintenance: Real time system running 365 / 24/ 7 days
- Avoids unscheduled downtime: and costly machinery damage and clean time
Challenges
- Sinter runs on conveyor belt at certain temperature. If sinter reaches very high temperatures it can cause fire at upcoming stage of production
- At the installation point lot of dust is also present and ambient temperature is high
Solution
- System Features for the prevention of fire in Sinter conveyor:
- Continuous monitoring of the thermal profile of running Sinter and with real-time temperature data (Analog Output)
- Reliable alarm release at defined thresholds and snapshot on that event.
- Easy hot spot detection.
- Reduced risk of damage to personnel & plant equipment.
- Camera with water cooled housing, air purge system for harsh environment.
Specifications
- Special Spectral range: 8 – 14 µm.
- Resolution: 382×288 pixels
- Frame rate: 80 Hz
- Signal Output:4-20 mA/ 0-10 V
- Available interface: USB/optional
- USB to PoE
Products and Accessories
Case Study Number
- TP3
Challenge
- The increasing flexibility of production lines requires a high adaptability of sensors. Continually changing object geometries, different temperatures and very high radiation or surrounding temperatures are no rarity.
- In a pilger mill those rough conditions can be found, among others in the production of seemless steel pipes. The raw steel blocks, each weighing a few tons are heated up first in a round oven at a temperature of 1300 °C.
- After descaling of the surface, the steel block is prepunched in a hole press with a strength from a converted 2000 t. In the next sloping rolling mill the growing pipe rotates between two rollers that are positioned at an angle to each other. The punching is widened to the size of the mandrel diameter.
Previous solution / Competitor product
- N/A
Solution
- The sensor that was installed at this application is the HMD OKA 2038.38 G with tube OL 19.
- The signal of the infrared sensors controls the movement of centering device and abutment. The point of view is restricted by the tube and prevents disturbances by steam in the cooling phase.
- An optimum adaptation to the operating conditions is given due to the adjustable response temperature. The HMD with self-learning response temperature (Auto-Teach function) is suited to continually changing conditions.
- The compact sensor with a stainless steel housing can withstand surrounding temperatures of up to 75° C. The use of a cooling jacket raises this up to 200° C.
- Alternatively sensors with fibre optic cables are available which permit an application at ambient temperatures up to 600° C without cooling.
Customer Benefits
- Maintenance-free
- High temperature stability
- Recognition of hot objects at big distances
- Self adjustment with Auto-Teach or step switch for the response temperature
Product Part number
- OKA 2038.38 G
Brand
- Proxitron
Accessories
- Piros swivel stand HM2
- Tube OL 19
- Pilot light unit (for alignment) DAK 308 + OL 26
- Different cable lengths (e.g. 15 m)
Customer Testimonial
compared to previous solution or competition
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