Mobile Worm Trommel Screen

Zhengzhou Sinolion Machinery Co., Ltd. is one of the most credible manufacturers and suppliers of mobile worm trommel screen in China. Please feel free to buy high quality mobile worm trommel screen for sale here from our factory. Good service and reasonable price are available.

 

Sorting and classifying bulk materials can quickly become a significant operational bottleneck across industries ranging from commercial composting and vermiculture to mining and topsoil production. Sticky, wet, or highly fibrous materials frequently clog standard vibrating screens, leading to costly downtime, manual intervention, and reduced product purity.

 

The Mobile Worm Trommel Screen offers an engineered solution to this persistent challenge. By combining the on-site flexibility of a mobile chassis with the high-torque continuous material advancement of internal worm (screw) flights and robust worm gear systems, this equipment provides dependable separation where traditional screening technologies fail.

 

 

What is a Mobile Worm Trommel Screen?

At its most basic level, a trommel screen is a rotating cylindrical sieve that separates materials based on physical size. However, incorporating the "worm" designation introduces specific mechanical features that fundamentally alter its performance capabilities:

 

• Internal Worm Flights: Inside the cylindrical drum, a continuous spiral or screw-like rib runs along the inner wall. As the drum rotates, these flights act as an internal conveyor mechanism, physically pushing material forward. This design prevents heavy or wet loads from piling up at the feed inlet, ensuring an even distribution across the entire screening surface.

 

• Worm Gearbox Reducers: Heavy-duty separation tasks require immense torque at low rotational speeds, typically between 10 and 20 RPM. High-quality mobile trommels utilize robust worm gearboxes. These reducers convert high motor speeds into steady, dependable rotational force capable of handling sudden shocks and dense, packed materials without stalling the motor.

 

• The Mobile Chassis: Built on a wheeled, towable frame or a heavy-duty crawler track system, these units can be easily moved across a job site, driven between agricultural fields, or transported via trailers to new contract locations. This mobility eliminates the need to haul raw, unseparated materials over long distances, lowering logistical costs.

 

 

Technical parameters

Model	Trommel Diameter (mm)	Trommel Length (mm)	Capacity Reference Range (ft³/h)	Transport Dimensions (Excluding Towing Parts) (mm)	Working Dimensions (Excluding Towing Parts) (mm)	Net Weight (kg)	Net Weight (LB)	Trommel Speed (r/min)	Trommel Inclination Angle Adjustable Range	Brush Included (Yes/No)
WTS0820	∅800	2000	177-707	2750*1214*1805	2750*1214*1805	650	1431.7	16-22	0-4°	Yes
WTS1022	∅1000	2200	530-1413	4400*1920*2100	4400*4500*2450	2750	6057.3	16-22	0-4°	Yes
WTS1025	∅1000	2500	530-1413	5400*1880*2100	5400*4350*2420	2900	6387.7	16-22	0-4°	Yes
WTS1230	∅1200	3000	1060-2473	5500*2200*2200	5550*4800*2530	3210	7070.5	16-22	0-4°	Yes
WTS1560	∅1500	6000	1413-3887	8400*2480*2500	8400*5700*2926	7200	15859.0	16-22	0-4°	Yes
WTS2050	∅2000	5000	2120-6184	8900*3200*3400	8900*7550*3828	13600	29955.9	12-16	0-4°	Yes
WTS2055	∅2000	5500	2120-6184	9350*3200*3384	9350*7525*3828	10560	23259.9	12-16	0-4°	Yes
Note: Technical data is subject to change without notice.

 

 

How the Screening Process Works

The operational logic of a mobile worm trommel screen relies on a clean combination of gravity, centrifugal force, and mechanical conveyance.

 

1. Feeding Phase

Raw material-such as un-screened compost, raw topsoil, mineral ore, or biomass-is deposited into the feed hopper using an excavator, skid steer, or an integrated loading conveyor belt.

 

2. Conveyance

As the material enters the slightly inclined rotating drum, the internal worm flights catch the bulk mass. The combination of the drum's rotation and the spiral flight design causes the material to continuously tumble, roll, and flip over itself. This constant agitation breaks apart compacted clumps, exposing all facets of the material to the screen mesh.

 

3. Sizing and Separation

Particles smaller than the screen apertures fall through the mesh into an underflow collection area or directly onto a discharge conveyor belt; these are known as the fines. Oversized materials-such as branches, plastics, large rocks, or unseparated masses-cannot pass through the mesh. Guided by the internal worm flight, they travel the full length of the cylinder and exit through the discharge chute at the tail end, known as the overs.

 

4. Continuous Self-Cleaning

To prevent material blinding (clogging) caused by damp soil or fibrous material, advanced units feature an external rotary nylon brush or a mechanical scraper mounted at the highest point of the drum. This brush continuously pushes trapped particles back into the drum, maintaining an open screen area throughout extended production cycles.

 

 

Critical Applications Across Key Industries

The structural adaptability of the mobile worm trommel screen makes it a vital asset in several distinct sectors.

 

Vermiculture and Insect Farming

In commercial earthworm and black soldier fly (BSF) larvae farming, separating live organisms and cocoons from finished compost or castings is a delicate task. Standard vibratory screens can easily injure the worms or become completely gummed up by the highly sticky, moisture-rich castings. A specialized worm trommel screen gently tumbles the mixture. The fine, nutrient-rich castings pass smoothly through a fine mesh (2 mm to 6 mm), while the live worms and unconsumed organic matter travel down the drum safely, ready for harvesting or re-population.

 

Commercial Composting and Mulch Production

Compost facilities handle raw inputs with highly variable moisture levels and irregular geometries. Plastic debris, stones, and oversized wood chips must be completely removed before marketing the final product. The internal screw conveyor mechanism of a worm trommel handles these sticky aggregates without blinding, cleanly separating premium fine compost from the structural overs that can be recycled back into the composting piles.

 

Topsoil and Aggregate Processing

Excavated topsoil is rarely ready for immediate commercial use; it typically contains clay clumps, root systems, and rocks. A mobile worm trommel screen breaks down clay binders through intense tumbling action, producing a uniform, high-value topsoil product directly at construction, landscaping, or environmental remediation sites.

 

Mining, Sand, and Industrial Slurry

For alluvial gold mining, sand washing, or industrial waste separation, these machines function as robust pre-screeners. Equipped with thick carbon steel or stainless steel plates, they withstand the abrasive wear of gravel and rock while separating the valuable fine fractions for downstream processing.

 

 

Key Engineering Advantages

Investing in a mobile worm trommel screen provides clear operational advantages over alternative screening methods like vibrating decks:

 

• Minimized Material Blinding: Vibrating screens rely entirely on rapid vertical or circular motion, which can pack wet, cohesive materials tighter into the screen openings. The rolling, tumbling action of a trommel, paired with an internal screw flight, distributes the material load dynamically, dramatically lowering clogging risks.

 

• Direct Processing at the Source: Transporting raw, unrefined material to a centralized plant adds unnecessary fuel, labor, and equipment wear. Processing material directly where it is excavated or generated means only final, high-value products need transport.

 

• Variable Speed and Flow Regulation: By pairing the worm drive with a Variable Frequency Drive (VFD), operators can adjust both the drum rotation speed and the internal material transit speed. This allows for real-time optimization when transitioning between bone-dry sand and wet, heavy organic compost.

 

• High Purity Output: The extended retention time provided by the internal worm flights ensures that material is thoroughly agitated before reaching the exit, yielding exceptionally clean separation and maximizing product yield.

 

 

Strategic Buyer's Considerations

Procuring industrial equipment requires careful evaluation of long-term operational variables. Before finalizing a configuration, consider the following factors:

 

• Corrosion vs. Abrasion Resistance: If processing food waste, chemical products, or wet vermicompost, choose a stainless steel (SUS304) build to combat organic acids and rust. For heavy rocks, sand, and gravel, opt for high-tensile carbon steel drums or modular polyurethane screen segments that resist abrasive wear.

 

• Power Availability: Determine whether your mobile site favors a self-contained diesel generator drive system or a localized 3-phase electrical connection. Many modern mobile units feature hybrid power setups, allowing operators to run on grid power when available or switch to onboard diesel power in remote environments.

 

• Maintenance Accessibility: Look for designs with quick-access side panels or removable upper hoods. Because screens are wear components, being able to change a mesh section in under an hour rather than a full day minimizes operational downtime.

 

The mobile worm trommel screen represents a practical fusion of rugged mechanical engineering and site flexibility. By combining heavy-torque worm gear systems and internal material-advancing screw flights, this equipment effectively resolves the historic challenges of handling sticky, high-moisture, and varied-size materials. Investing in a properly specified, robustly manufactured unit ensures long-term operational resilience across any demanding screening application.

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