Asphalt plants deal with a harsh environment and are subject to great mechanical and thermal constraints. Process monitoring and optimization is becoming an increasingly important issue for plants, especially in terms of energy savings.
Working closely with many of the world’s leading asphalt producers, ENVEA has developed an in-depth understanding of monitoring conditions faced by the plants.
As a result, ENVEA offers a specific package of rugged and reliable online measurement solutions helping plants to optimize their process : moisture measurement, filter performance monitoring, etc.
Moisture content of storage raw material is a key element to the plant gas consumption. Since it changes on a daily basis, the process operating parameters need to be adapted continuously.
The manufacturing process includes 2 main sources of raw material supply:
- aggregates of all sizes sent to the rotary kiln via cold conveyors
- recycled materials inserted in the mixing tower.
ENVEA’s solution: M-Sens
- Optimized boiler combustion, reduced gas consumption
- Time saving and product quality improvement thanks to online and continuous moisture measurement.
Material flow monitoring
Due to the harsh conditions within the process, material flow monitoring is essential to ensuring a better yield of the final product and thus increasing the productivity.
ENVEA’s solution: FlowJam
- Quick detection of production stoppages
- Reduced downtime and maintenance
Level and limit detection
Minimum and maximum level detection at various points within the asphalt plant is critical.
If silos, bucket elevators, chutes and hoppers are overfilled or insufficiently this will lead to blockages and plant downtime.
ENVEA’s solution: ProGap
- Online warning of materials level
- Quick detection of production jams
Filter performance monitoring
Optimizing filter performance is key to ensuring the smooth running of production facilities. The ability to identify or predict filter failure ensures production is kept at its required demand.
ENVEA’s solution: LEAK ALERT
- Reduced downtime
- Increased productivity
- Reduced filter replacement costs
Continuous measurement of particulate emission concentration enables to meet and exceed national and international standards.
That can be achieved through ENVEA’s ElectroDynamic™ range of products designed for use in harsh environments.
ENVEA’s solution: STACK or VIEW range, DUST TOOLS software
- Compliance with Emission Limit Values (ELV)
- Reduced environmental impact
Ambient air quality monitoring or/and process leak detection
Real-time odour monitoring (ex: H2S), particulate leaking and PM sizing can help to better identify environmental issues as well as protecting the workforce/neighbours from exposure to hazardous material.
ENVEA’s solution: Cairsens® micro-sensors (H2S and PM), AirSafe
- Help to reduce environmental impact on population
- Anticipate at-risk situations
- Reduce maintenance costs
TESTIMONIAL – MR. PIERRE BEAUQUESNE, EQUIPMENT MANAGER AT EUROVIA
The EUROVIA MPRO asphalt plant in Mitry Mory (France) was commissioned in 1988.
The site produces more than 120,000 tons of asphalt each year for road construction sites.
What is the context for upgrading the site in terms of emissions control?
“The installation is equipped with a bag filter covering a surface area of more than 1,100 m2, which is composed of more than 700 Nomex® type textile bags. It is intended to ensure the filtration of dust-laden raw gases in order to guarantee a weight index set by local authorities’ order at 50 mg of total dust/Nm3.
As the filter bags of this dust collector are highly strained, we were looking for a reliable measuring device to alert us immediately if the 50 mg threshold was exceeded.”
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