Description
FOX Ejectors for Maintenance-Free Pneumatic Conveying of Solids without Moving Parts
FOX Venturi ejectors are utilized to inject bulk solids such as powders, pellets, flakes, and particles into positive pressure conveying systems. They provide end-users and system designers with a reliable way to eliminate rotary valves from conveying systems where rotary valves simply cannot adequately operate, especially with very fine, abrasive, fragile, or high-temperature materials.
Why are fox eductors for solids conveying used in pneumatic conveying systems?
FOX Venturi ejectors have no moving parts, enabling maintenance-free handling of bulk materials. This is particularly advantageous in applications involving fine, abrasive, or irregularly shaped products. Replacing existing rotary airlocks with venturi ejectors results in simpler, more reliable conveying systems. Designing with ejectors from the outset ensures the most reliable product feed.
No Backflow – All rotary airlocks/valves experience backflow – also known as fugitive dust or leakage. When the transported product is fine or abrasive, backflow can cause severe wear issues. Even with free-flowing products, backflow can lead to bridging, cleaning problems, or even explosion hazards. Installed under filter houses, screw conveyors, or dust collectors, rotary airlocks can be a significant source of fugitive dust emissions, which are eliminated with the adoption of FOX ejectors.
Applications by Industry:
Power Generation / Combustion Plants:
- Transport of activated carbon, lime, calcium carbonate, Trona, and other additives for flue gas desulfurization (FGD).
- Coal, coke, biomass, shredded tires, and other alternative fuels.
- Absorbents for SOx reduction.
Food Industry:
- Transport of milk and non-dairy powders from spray dryers.
- Coffee beans, starch, sugar from bulk bags, tea powder from sifters.
- Rice, cereals from extruders and dryers, extrudate for snacks from extruders, frozen peas, whole peanuts from sorters.
- Small ingredients for mixing/batching such as salt, sugar, spices, vitamins, flavors, etc.
- Recycled product from packaging areas.
Cement Industry:
- Transport of CKD up to 420°C; Portland cement up to 9,000 kg/hour.
- Alternative fuel injection (shredded carpet/plastic/tires/paper; biomass, rice husks) in combustion furnaces up to 870°C.
Plastic Processing Industry:
- Transport: plastic pellets with reduced angel hair and fine particles from hundreds of extruders and compounding lines.
- Glass fiber/mica-filled pellets with ceramic-coated, wear-resistant ejectors.
- Reliable transport of plastic regrind, chips, and flakes without moving parts.
Pollution Control:
- Transport of: activated carbon, sodium bicarbonate, hydrated lime, Trona, pulverized limestone to channels.
- Injection of sorbent into fluidized bed boilers for SOx reduction.
Mineral Resources:
- Transport of copper and nickel alloys at 530°C.
- Mica, talc, quartz, and perlite ore from dust collectors.
- Copper pellets with a bulk density of 6400 kg/m3.
Ceramics/Glass:
- Transport of silica, crushed glass, ceramic powder, mica.
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