Vacuuming up coarse debris and heavy dust—robust solutions for high material loads

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Rock fragments, granules, pellets, metal parts, swarf, broken glass, production waste, and other heavy residues present different challenges than pure Fine Dust. The decisive factors are not just motor power or maximum vacuum, but the interplay of vacuum, airflow, intake geometry, hose diameter, conveying length, and material properties.

EVOTEC tailors the suction unit, pre-separation system, filter, hopper, and discharge system to the specific bulk material—for both mobile cleaning tasks and stationary collection and conveying stations.

Benefits for dealing with coarse dirt and heavy dust:

Reliably handle heavy materials

Vacuum pressure, flow rate, hose cross-section, and collection accessories are combined in such a way that material is transported from the collection point to the container.

Take both coarse and fine components into account together

Pre-separation, the filter surface, and the discharge system protect the system from overload, wear, and unwanted dust release.

Clearly Separate Mobile and Stationary Tasks

Mobile vacuum cleaners offer flexible cleaning; stationary systems handle recurring collection and transport tasks at fixed locations.

What kind of footage would you like to shoot—and from what distance? Please provide us with the particle size, density, quantity, moisture content, discharge height, hose run, and operating time. We will work with you to evaluate suction capacity, pre-separation, filtration, and discharge.

What counts as coarse dirt and heavy dust?

“Coarse contaminants” does not refer to a uniform group of substances. It refers to particles and bulk materials that, due to their size, density, or shape, place higher demands on collection and pneumatic conveying. At the same time, many residues contain a portion of fine dust, which remains critical for filtration and occupational safety.

Coarse, heavy, and angular components

Typical examples include granules, pellets, rock and concrete debris, broken glass, sand, metal parts, swarf, blasting media, and compact production waste. Sharp-edged and abrasive components can place greater strain on hoses, elbows, separators, and containers.

Don't Overlook Fine Particles and Chemical Hazards

Even a material that is predominantly coarse can contain fine dust. The dust class and filter design are not based on the visible coarse fraction, but rather on the constituents, occupational exposure limits, fine fraction, and risk assessment.

Before processing, the material density, particle size distribution, shape, abrasiveness, moisture content, temperature, and any foreign matter are recorded. For varying mixtures, a representative sample or a practical test is often more informative than a general description.

Where do coarse dirt and heavy residues form?

Heavy material loads occur in manufacturing, recycling, construction, metalworking, bulk material handling, and maintenance. The appropriate solution depends on whether residues lie loosely on surfaces, accumulate in specific locations on machines, or are regularly transported between process stages.

Production, Processing, and Treatment

Cutting, milling, turning, blasting, crushing, sorting, and deburring produce swarf, abrasion particles, splinters, and heavy dust mixtures. Near machines, dedicated connections and short distances are advantageous; in open work areas, the nozzle and operating controls determine the intake.

Floors, areas surrounding facilities, and collection points

Routine cleaning involves traffic areas, machine foundations, pits, containers, and hard-to-reach areas. Large volumes or long distances require durable hoses, appropriate diameters, and a discharge system compatible with the facility’s waste disposal process.

How can heavy materials be effectively loaded and transported?

Reliable material conveyance depends on the correct operating point. Negative pressure overcomes resistance and helps lift heavy particles; sufficient airflow and air velocity keep the material moving inside the hose. The cross-sectional area, length, bends, and elevation differences significantly affect the achievable transport capacity.

Consider Negative Pressure and Flow Rate Together

High vacuum pressure alone does not guarantee good flow rate. For dense or compact materials, the suction unit must also provide sufficient airflow when connected to the actual hose system. Cross-sections that are too large can reduce flow velocity; cross-sections that are too small increase resistance and the risk of clogging.

Hose Routing and Mounting Accessories

Short, straight conveying paths with few tight bends reduce pressure losses and wear. Floor nozzles, suction tubes, machine connections, and handpieces are adapted to the particle size, surface, and shape of the material so that coarse parts can enter without unnecessarily restricting the system.

Pre-separation and wear-resistant components

When dealing with large volumes of material, pre-separators or collection tanks help reduce the load on the filter stage. For abrasive or sharp-edged materials, reinforced hoses, sturdy elbows, and suitable separators may be required. Foreign objects and hot components must be evaluated in advance.

Containers, Discharge, and Disposal

Tipping containers, collection carts, big-bag, airlock, or drum solutions are selected based on material volume, weight, and disposal method. The design takes into account the permissible container load, ergonomic handling, and low-dust container changes.

The entire conveying system is critical: the intake, hose or pipe network, suction unit, pre-separator, filter, hopper, and discharge must function as a single system. Bottlenecks or unsuitable transitions can limit performance even if the vacuum cleaner is adequately sized.

Extraction Concepts by Application Type

Mobile Cleaning and Changing Work Locations

Mobile industrial vacuum cleaners are suitable for floors, areas around machinery, pits, maintenance, and spot material collection. They are transported to the work site and, with the right hoses, pre-separators, and containers, can flexibly handle varying volumes.

Stationary installation at fixed process points

Stationary systems are suitable for recurring tasks on machines, transfer points, or collection points. The piping network, suction points, simultaneous operations, and discharge are permanently tailored to the process. This reduces setup times and enables controlled operating conditions.

Large quantities and a continuous flow of material

In the event of high or continuous throughput, pre-separation, larger collection volumes, and automatic discharge can ease the operational load. The required reserve is determined by the conveying rate, peak loads, and discharge intervals.

Moist Materials and Liquid Content

Moist residues or mixtures of solids and liquids require suitable wet/dry systems. Filters, containers, seals, and drainage systems must be compatible with the substances being handled. Dry hazardous substances must not be mixed with liquids without first being tested.

Related Applications: Learn more about the extraction of abrasive dust, metal chip extraction, and extraction technology for recycling facilities.

What factors determine the design for coarse debris?

The selection process begins with the material and ends with discharge. A description such as “heavy dust” is not sufficient: Specific information is required regarding the most challenging material, the longest transport distance, and the maximum simultaneous volume.

Material and Hazards

Particle size, shape, density, and bulk density
Particle size, abrasiveness, humidity, and temperature
Ingredients, Limit Values, and Required Dust Class
Flammability, Ignition Sources, and Potentially Explosive Atmospheres

Conveyor Path and Operating Mode

Hose or pipe diameter, length, bends, and delivery head
Intake Type, Suction Points, and Simultaneously Active Connections
Amount of material per operation or hour
mobile, intermittent, or continuous operation

Avoid common mistakes: Conveyor paths that are too long or too narrow, unsuitable nozzles, overfilled containers, lack of pre-separation, and clogged filters reduce performance. According to TRGS 500, dry sweeping or blowing away dust deposits is generally not permitted.

Which solution is right for your material?

A material sample, photos of the collection site, and information on quantity, conveying distance, operating time, and disposal enable a reliable preliminary selection. For critical or variable materials, a field test can validate the design.

Assess hazardous or flammable fine particles separately

Coarse residues do not rule out the presence of hazardous fine particles. The dust class is selected based on the specific substance; the IFA explains dust classes L, M, and H. If flammable dusts can occur in hazardous concentrations, the substance’s characteristics, ignition sources, zone classification, and protective measures must be assessed separately. Equipment labeling does not replace this hazard assessment.

Mobile devices are suitable for flexible cleaning tasks, maintenance, and spot collection at varying locations. The products shown here are designed for use with coarse debris and heavy dust; their specific suitability depends on the material, quantity, conveying path, proportion of fine particles, and potential hazards.

ECODustPro

High-performance industrial vacuum cleaner with a combination filter system ("M" + "H") for all types of dry dust, also available in explosion-proof or asbestos-safe models.

Vacuuming up coarse debris and heavy dust—robust solutions for high material loads

Extraction of coarse debris and heavy dust—tailored to the material, conveying path, and operating mode

Reliably handle heavy materials

Take both coarse and fine components into account together

Clearly Separate Mobile and Stationary Tasks

What counts as coarse dirt and heavy dust?

Coarse, heavy, and angular components

Don't Overlook Fine Particles and Chemical Hazards

Where do coarse dirt and heavy residues form?

Production, Processing, and Treatment

Floors, areas surrounding facilities, and collection points

How can heavy materials be effectively loaded and transported?

Consider Negative Pressure and Flow Rate Together

Hose Routing and Mounting Accessories

Pre-separation and wear-resistant components

Containers, Discharge, and Disposal

Extraction Concepts by Application Type

Mobile Cleaning and Changing Work Locations

Stationary installation at fixed process points

Large quantities and a continuous flow of material

Moist Materials and Liquid Content

What factors determine the design for coarse debris?

Material and Hazards

Conveyor Path and Operating Mode

Which solution is right for your material?

Assess hazardous or flammable fine particles separately

Mobile industrial vacuum cleaners for coarse debris and heavy residues

Stationary extraction system for fixed extraction points and recurring tasks

Frequently Asked Questions About the Extraction of Coarse Debris and Heavy Dust (FAQ)

What counts as coarse dirt and heavy dust?

Is the highest possible vacuum sufficient for heavy materials?

When is a mobile device the better choice—and when is a stationary system?

What dust class is required for coarse dirt?

When must fire or explosion hazards be taken into account?

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Which extraction solution is right for your coarse debris?