Preventing particle agglomeration inside pellet mill equipment
OHMVO engineered a custom thermal solution for a pellet mill machinery manufacturer, combining flexible heaters, tailored insulation and automatic control systems to help reduce food and biomass particle buildup on pellet mill walls.
Our customer, pellet mill machinery manufacturer facing a real process challenge
They develop industrial pelletizing equipment for sectors where process reliability, material flow and production continuity are essential. In pelletizing applications, small thermal imbalances can quickly become operational issues.
The project focused on a practical industrial problem: particle agglomeration on internal machinery walls when cooler surfaces encouraged material buildup.
OHMVO’s role was not to provide a standard heater from a catalogue. The challenge required a co-designed thermal architecture adapted to machinery geometry, process behavior, insulation needs and production constraints.
When cold machine walls create particle buildup
In cold or cool production facilities, pellet mills can face agglomeration of food, biomass or organic particles on machine walls. Once material starts sticking, the issue can expand into clogging, uneven feed distribution, additional cleaning and reduced process stability.
The challenge was not simply to add heat. The real objective was to stabilize critical wall temperatures, reduce cold spots and help maintain a more consistent material flow without delaying production.
Typical symptoms in pellet processing equipment
Custom thermal insulation, flexible heaters and automatic control
OHMVO designed a tailored thermal solution combining insulation, high-precision flexible heaters and automatic control systems to help maintain a stable working temperature on selected pellet mill wall surfaces.
The heaters and insulation components had to be adapted to the exact shape, size and function of complex machinery parts. The solution also had to be delivered under time pressure, without delaying production schedules.
Thermal solution architecture
Co-designed with engineers, not selected from a catalogue
Pellet mill machinery rarely offers perfect flat surfaces or standard heater geometries. OHMVO approached the project as a co-design challenge, adapting heating, insulation and control logic to the real machine architecture.
Technical features that made the solution possible
Reducing agglomeration risk requires more than heating power. It requires contact quality, thermal uniformity, stable measurement, insulation reliability and long-term identification in demanding industrial environments.
| Production constraint | Technical risk | OHMVO response | Business value |
|---|---|---|---|
| Cold machine walls | Food or biomass particles adhere to cooler surfaces. | Custom flexible heaters combined with thermal insulation. | Reduced buildup risk and more stable material flow. |
| Complex machinery geometry | Standard heaters do not match the real shape or function of parts. | Co-designed heater and insulation geometry for each critical zone. | Better thermal contact and easier integration. |
| Uneven temperature | Cold spots become sticking points for particles. | Etched-foil circuit design for more uniform surface heating. | More consistent temperature distribution. |
| Process variability | Temperature drift affects material behavior and cleaning frequency. | Embedded sensors and automatic control systems. | Improved process stability and lower manual adjustment. |
| Harsh industrial environment | Moisture, contaminants and mechanical stress can reduce heater reliability. | Industrial-grade silicone protection and electrical validation. | Longer service reliability and reduced replacement risk. |
| Maintenance identification | Labels can fade, peel off or become unreadable over time. | Laser engraving with part number, voltage, QR code or OEM marking. | Improved traceability for maintenance crews and OEM service teams. |
Temperature control where the process actually needs it
Automatic control systems are especially valuable in pellet mill applications because the target is not simply to heat more. The goal is to maintain a stable wall temperature that helps reduce sticking while avoiding inefficient overheating.
OHMVO can integrate temperature sensors directly into the flexible silicone matrix. By placing the sensing element close to the heated area, the control system can reduce measurement lag and respond more accurately to process conditions.
Built for long-term industrial service
Pellet mill environments can expose heating systems to moisture, dust, contaminants, vibration, cleaning cycles and mechanical stress. A heating solution must therefore be designed for the real maintenance environment, not only for laboratory conditions.
Permanent laser engraving can help OEMs and service teams identify voltage, power rating, part number, wiring reference, QR code or white-label information long after traditional labels would have disappeared.
What engineers should define before designing a pellet mill heating system
The quality of the final thermal solution depends heavily on the input data shared during the design phase. For applications involving particle buildup, the most useful information usually combines process, geometry, electrical and maintenance constraints.
From sticky particles to more stable production
Despite the complexity of the machinery parts and a tight timeline, OHMVO delivered a custom thermal solution aligned with Customer’s expectations. The result was a more controlled process environment, with reduced cold-wall risk and a better foundation for stable production.
Quantification framework to strengthen the case
To make the case study even stronger, future updates should include before / after operational data from the production environment.
| Metric to collect | Why it matters | Expected business value | Status |
|---|---|---|---|
| Cleaning frequency before / after | Shows whether the solution reduced buildup-related cleaning. | Lower maintenance time and fewer interruptions. | To be confirmed |
| Production stops linked to buildup | Measures the operational impact of particle agglomeration. | Reduced downtime and more predictable production. | To be confirmed |
| Wall temperature stability | Validates that the heating system reduced cold spots. | More stable material behavior. | To be confirmed |
| Energy consumption | Confirms whether insulation and control reduced wasted heating. | Better energy efficiency. | To be confirmed |
| Operator feedback | Adds credibility from the production floor. | Stronger trust for future machinery projects. | To be collected |
Similar heating logic for hoppers, feeders, silos and processing equipment
The same thermal reasoning can apply to many industrial systems where material behavior changes with temperature: hoppers, feeders, dosing equipment, silos, chutes, mixers, dryers or packaging systems.
If cold spots, condensation, viscosity changes or particle buildup are affecting your process, OHMVO can help define a custom heating and insulation approach adapted to the surface, geometry and production constraints.
Questions about custom heaters for pellet mills and particle agglomeration
Why do particles agglomerate on pellet mill walls?
Particle agglomeration can occur when machine walls are too cold or when surface temperature is unstable. In food, biomass or organic material processing, cooler zones may encourage particles to stick, accumulate and disrupt material flow.
How can flexible heaters help reduce buildup inside pellet mills?
Flexible heaters can stabilize selected wall surfaces by providing controlled heat where particles tend to accumulate. When combined with insulation and automatic control, they help reduce cold spots and improve process consistency.
Why is etched-foil technology useful for this application?
Etched-foil technology allows more complex circuit patterns and broader contact areas, helping distribute heat more evenly across the target surface than basic wire layouts.
Can OHMVO heaters be adapted to complex machinery shapes?
Yes. OHMVO designs custom flexible heaters and insulation parts to match the shape, size and function of specific machinery components, including curved or constrained surfaces.
What sensors can be integrated into a flexible heater?
Depending on the application, OHMVO can integrate PT100 RTDs, thermocouples, thermostats or thermal limiters to support accurate measurement, automatic control and safety redundancy.
What information is needed to design a custom pellet mill heating solution?
Useful data includes machine geometry, material behavior, target temperature, ambient temperature, available voltage, power constraints, mounting method, insulation requirements, cleaning conditions and maintenance access.
Can the heaters include permanent part identification?
Yes. Laser engraving can be used to add part numbers, voltage, power rating, QR codes, wiring references or OEM white-label identification directly onto the silicone surface.
Can this approach be used outside pellet mills?
Yes. Similar heating and insulation strategies can be used for hoppers, feeders, silos, chutes, tanks, dosing systems and other processing equipment where temperature affects material behavior.
Need to reduce particle buildup, condensation or cold spots in your processing equipment?
If your pellet mill, feeder, hopper or industrial processing equipment suffers from material buildup, unstable wall temperature or cold-environment production issues, OHMVO can help design a custom heating and insulation system adapted to your machinery.