Used Hollow Screw Dryers for Sale
Hollow screw dryers are indirect heat transfer systems designed to dry bulk materials by circulating a heating medium through hollow flighted screws while simultaneously conveying and agitating the product. This design allows for efficient thermal contact, uniform drying, and controlled processing of wet solids, sludges, and pastes. Used hollow screw dryers are widely utilized in chemical processing, wastewater treatment, food production, and environmental applications where energy efficiency and contained drying are important. Browse available inventory below to find systems that align with your material handling and drying requirements.
Stock No.:
10128075Used Twin Screw Stainless Steel Hollowscrew Dryer. Twin 12" diameter x 128" long scre
Used Twin Screw Stainless Steel Hollowscrew Dryer. Twin 12" diameter x 128" long screws. Trough is jacketed and insulated. The trough measures 142" long x 20.5" wide x 16" deep. The trough top has a 13.25" x 16" inlet, 6" x 9" inlet, and grating on the rest of the top. 6" diameter flanged outlet with gate valve. Screws are driven by a 1.5 hp 1140 rpm motor through a reducer down to 6.9 rpm. Dryer sits on a carbon steel frame with catwalk and ladder. Overall dimensions are 75" wide x 205" long x 120" tall. Requires 230/460 vac 3 phase electrical supply.
Stock No.:
53147051Used Anderson Dahlen Stainless Steel Dual Screw Holoflite Dryer – 24” x 20’ ASME Rated
Used- Anderson Dahlen Stainless Steel Dual Screw Holoflite Dryer, 24" diameter X 20' long. Constructed from 316L stainless steel. Screws and jacket are rated for 100 PSI/FV @ 350 degrees / -20 degrees Fahrenheit. Previously used to dehydrate food waste. Previously heated by hot oil. ASME code built.
MFR: Anderson Dahlen
Stock No.:
53912001Stainless Steel 24” U-Trough Screw Conveyor with Thermal Heating & Cooling
Used- S. Howes U-Trough Thermal Processing Screw Conveyor, Model 24U24-JS. 24" diameter screw, 24' Long inside dimension. Oversized 16" diameter shaft pipe, Journals thru-bored to allow heating fluid flow through shaft. 22' Overall jacket length; 14.9 psig design pressure. Designed for thermal fluid heating/cooling media or low pressure steam. 316 stainless steel construction in product contact and jacket areas. 3" inlet/outlet on main body; 1" on heated/cooling screw. Fulton control panel 120-VAC, 1-Phase, 60HZ with 6 digital PID temperature controllers. 3 x 3" pneumatic valves for inlet fluid control on main body of screw conveyor. 1 x 1" pneumatic valve for inlet fluid control on screw. 10 x 3" manual gate valves for support plumbing, Sectional covers. Driven by a 15 hp, 3/60/460V motor. Machine # 117390, New in 2012. Our freight specialists can assist you with door to door transportation and all customs documents needed to make the process go as smoothly as possible.
MFR: S Howes
Stock No.:
54447001Denver Sala Holo-Flite Dryer D24-24-6 | Refurbished Indirect Thermal Sludge Dryer System
Fully Refurbished Denver Sala Holo-Flite Dryer, Model D24-24-6. Indirect thermal sludge drying processor with dual holo-flite screws and vapor dome. Fully refurbished with new components. 316 Stainless Steel contact surfaces. (2) Screws 24'' diameter x 24' long, rated for 150 psi at 650 degrees F. Non-contact carbon steel exterior trough jacket rated 30 psi at 650 degrees F, Hot Oil or Water/Glycol heating medium. 10 HP Baldor motor. Contains Sumitomo Cyclo 6000 gearbox. Tomaso Built process control system provides fully automated operation of the Denver-Sala D24-24-6 dryer, ensuring consistent product quality, maximum throughput, and equipment protection across variable feed conditions; Product Temperature Protection, Residence Time Control, Feed Interlock System, Dynamic Safety Overrides, Vapor & Pressure Control, Mechanical Protection, Thermal Oil Control, Recipe-Based Operation, CIP Mode, HMI Interface. Fully refurbished 12/23/2025.
MFR: Denver
Hollow Screw Dryer Applications & Typical Use Cases
Used hollow screw dryers are well-suited for continuous drying of difficult or high-moisture materials. Typical applications include:
Drying wastewater sludge and biosolids
Processing chemical pastes, slurries, and filter cakes
Removing moisture from food byproducts and agricultural materials
Handling sticky or cohesive materials that require agitation during drying
Supporting thermal treatment of industrial byproducts and residuals
When to Choose a Hollow Screw Dryer
Hollow screw dryers are ideal for operations requiring indirect drying with efficient heat transfer and material movement in a single unit. They are often selected for materials that are difficult to fluidize or prone to clumping. Facilities working with viscous, sticky, or high-moisture content materials benefit from the self-cleaning action and continuous conveying provided by the screw design.
Used Hollow Screw Dryer Buying Considerations
When evaluating a used hollow screw dryer, consider the following:
Screw Diameter & Length: Determines capacity and residence time
Heating Medium: Steam, thermal oil, or other heat sources
Throughput & Moisture Reduction: Match drying performance to process requirements
Material Handling Characteristics: Suitability for sticky, abrasive, or fibrous materials
Sealing & Containment: Important for odor control or hazardous materials
Condition & Heat Transfer Surfaces: Inspect screw flights, shafts, and internal passages
Why Buy Used Hollow Screw Dryers
Used hollow screw dryers can be a strong fit for facilities looking to add drying capacity without committing to long equipment build cycles. Their compact footprint and integrated conveying design make them adaptable to existing plant layouts. For operations dealing with challenging materials, these systems provide a reliable approach to continuous drying and material handling.
Sell Your Used Hollow Screw Dryers
Facilities retiring sludge handling systems or upgrading drying technology can reposition hollow screw dryers through Aaron Equipment’s resale network. We review equipment details and align available units with buyers running similar material profiles and processing conditions.
A hollow screw dryer is an indirect drying system that uses heated, hollow screw flights to transfer heat to material while conveying it through the unit. It is commonly used for drying bulk solids, sludges, and pastes.
They are used to dry materials such as sludge, chemical pastes, food byproducts, and industrial residues. These dryers are particularly effective for materials that are sticky, high in moisture, or difficult to handle.
Hollow screw dryers combine drying and conveying in one system using indirect heat, whereas many other dryers rely on direct heat or separate material handling equipment. This makes them well-suited for contained and energy-efficient drying.
Pricing reflects factors such as screw size, heating configuration, throughput capacity, and overall condition. Units designed for higher volumes or specialized materials typically fall at higher price levels.
Yes. Aaron Equipment sources hollow screw dryers from facilities phasing out equipment or modifying process lines, helping place these systems into operations that require continuous indirect drying.