• Product Details

Zhanghua is a reputable manufacturer known for its continuous rotary disc dryer, specifically designed for industrial sludge drying. This advanced technology, also known as the RVPD (rotary vacuum paddle dryer), offers efficient and cost-effective drying solutions for various sludge types.

The continuous rotary disc dryer utilizes a unique design with multiple discs arranged on a central shaft. These discs rotate at high speeds, creating a turbulent flow of hot air that effectively dries the sludge. The sludge is evenly distributed onto the discs, maximizing the contact surface area for efficient drying.

One of the key advantages of the Zhanghua continuous rotary disc dryer is its ability to handle high-moisture sludge. It achieves high evaporation rates, resulting in significantly reduced sludge volume and increased solid content. This not only reduces disposal costs but also allows for easier handling and transportation of the dried sludge.

The RVPD dryer is energy-efficient, incorporating advanced heat recovery systems that recycle the hot air, minimizing energy consumption. The system also includes an intelligent control system that ensures precise control of temperature, residence time, and other parameters, optimizing the drying process.

Type:Vacuum Drying EquipmentDrying Capacity (kg):26000kg
Application:Medicine Processing, Chemicals Processing, Pharmaceutical Processing, Chemicals ProcessingCondition:New
Place of Origin:Jiangsu, ChinaBrand Name:ZHANG
Voltage:Customization, 220-440VPower:Customization
Dimension(L*W*H):CustomizationKey Selling Points:High Productivity
Warranty:1 YearWeight (KG):Customization
Applicable Industries:Energy & Mining, Pharmaceutical CompanyShowroom Location:None
Marketing Type:New Product 2020Machinery Test Report:Provided
Video outgoing-inspection:ProvidedWarranty of core components:1 Year
Core Components:Pressure vesselMaterial:SUS304, SUS304L, SUS316, SUS316L, Ti, Other, SS304, SS316L, Titanium, Hastelloy, PTFE lined
Product name:Drying MachineKeywords:Harrow Type Vacuum Rake Dryer
After-sales Service Provided:Online support, Video technical support, Field installation, commissioning and training, Field maintenance and repair serviceAfter Warranty Service:Video technical support, Online support, Spare parts
Local Service Location:NoneCertification:GMP/CE/PED/ASME/GB150

Products Description


The RVPD (rotary vacuum paddle dryer) is a versatile drying technology that can be applied to various industrial sludge types. The RVPD dryer is particularly well-suited for drying sludge with high moisture content, which may be difficult to dry using other drying technologies.

1. Municipal wastewater sludge - The RVPD dryer is commonly used in municipal wastewater treatment plants to dry sludge generated during the treatment process. This results in reduced disposal costs and improved environmental outcomes.

2. Food waste - The RVPD dryer can effectively dry food waste, converting it into a valuable resource for use in animal feed or as a fuel source.

3. Pulp and paper sludge - The RVPD dryer is well-suited for drying pulp and paper sludge, resulting in reduced disposal costs and improved product quality.

4. Chemical sludge - The RVPD dryer is effective in drying chemical sludge, such as those generated in chemical manufacturing processes. The dryer can help minimize waste volume and reduce disposal costs.


The rotary vacuum paddle dryer (RVPD) is a specialized drying equipment used for drying heat-sensitive materials and substances with high moisture content. It operates under vacuum conditions and employs paddles or blades to facilitate efficient drying. The working principle of a rotary vacuum paddle dryer can be described as follows:

  1. 1. Loading: The material to be dried is loaded into the cylindrical drying chamber of the RVPD.

2. Vacuum: A vacuum pump is used to create a vacuum inside the drying chamber. The reduced pressure lowers the boiling point of the liquid in the material, enabling faster evaporation.

3. Heating: The heating medium, such as hot water or steam, is circulated through the jacket surrounding the drying chamber. This raises the temperature inside the chamber and facilitates the evaporation of moisture from the material.

4. Rotation and Mixing: Paddles or blades are mounted on a central shaft within the drying chamber. The shaft and paddles rotate at a controlled speed. As they rotate, the paddles lift and tumble the material, ensuring that it comes into direct contact with the heated surfaces. This promotes efficient heat transfer and uniform drying.

5. Evaporation: The combination of vacuum, heating, and mixing promotes the evaporation of moisture from the material. The evaporated moisture is removed by the vacuum pump.

6. Condensation: The evaporated moisture is condensed back into liquid form, usually in a separate condenser unit connected to the vacuum pump.

7. Discharge: Once the desired level of moisture removal is achieved, the dried material can be discharged from the drying chamber.

The rotary vacuum paddle dryer offers several advantages, including gentle and efficient drying, reduced drying time, and the ability to handle heat-sensitive materials. The vacuum reduces the boiling point of the liquid in the material, minimizing the risk of thermal degradation. The rotation and mixing action ensure even drying and prevent material buildup on the heated surfaces.


1. Being installed stirrer in the machine, it makes raw material form a state of continuous circle inside the body, so the heating uniformity of raw material is raised greatly.

2. Being installed stirrer in the machine, slurry and paste shape material can be dried easily.
3. Special design for discharging port, make better sealing and less material accumulation, discharge is easy.
4. There are two seal model, mechanical seal and packing seal. The design supply good seal and long life.
5. The special techniques of shaft and rake support high strength and concentric.
6. The medium in shaft and vibration adding equipment will be equipped by requirement
7. Use different filter form according to different material.
Product Details
Zhanghua - Continuous Rotary Disc Dryer Industrial RVPD Dryer for Sludge Drying
Zhanghua - Continuous Rotary Disc Dryer Industrial RVPD Dryer for Sludge Drying
Technical Parameter
Working volume(L)
Heating area(㎡)
Motor Power(kw)
Design / Calculation Software
Zhanghua - Continuous Rotary Disc Dryer Industrial RVPD Dryer for Sludge Drying

Company Profile

Basic Information
  • Year Established
  • Business Type
  • Country / Region
  • Main Industry
  • Main Products
  • Enterprise Legal Person
  • Total Employees
  • Annual Output Value
  • Export Market
  • Cooperated Customers


Send your inquiry


Please provide us with the information below to complete your request.    Just leave your email or phone number in the contact form so we can send you a free quote for our wide range of designs!    


The products cover the domestic market with its excellent quality and are exported to Europe, North America and other developed countries and developing countries in Southeast Asia, Africa, the Middle East and so on.

Send your inquiry

Choose a different language
Current language:English