About Zhanghua Vertical Dryer- Nauta Conical Dryer user manual | Zhanghua

March 01, 2023

Nauta Conical Dryer of Wuxi Zhanghua Pharmaceutical Equipment is suitable for various drying and evaporation processes in batch operation. The nauta conical dryer consists of a conical container with agitating screws mounted close to the container wall, specially developed to reduce processing time and maximize material protection.

The agitating screw in the shape of a double-leaf (or single-leaf) conical spiral shape is connected to the shaft through a connecting piece. The screw pushes the material up along the heated container wall. At the same time, the material then goes down into the interior of the chamber. Effect: The entire chamber achieves uniform temperature and material humidity. To further reduce drying time, it is also possible to heat the screw and vacuum technology. In the convection drying equipment, heated steam or hot air is fed into the interior of the mixing unit andcan heat up the drying unit components.



Nauta Conical Dryerof Wuxi Zhanghua Medical equipment can be used in various fields, including laboratory operations, large-scale production, highly sensitive pharmaceutical industry and robust and environmentally friendly products. Based on these variable device types, Wuxi Zhanghua Medical equipment are constantly developing solutions for new areas for customers. Due to the very wide range of possible applications, only a few can be mentioned here: API drying in the pharmaceutical industry, sterilization of seasonings in the food industry, drying of ion exchange resins in the chemical industry, evaporation of slurry containing solvent in environmental protection technology and coating of iron powder and additives in the metallurgical industry. Numerous process steps can be replicated in nauta conical dryer.



System Features


- One side fixed, self-centering spiral structure

- The homogenization produced by the double-line powder mixing spiral is particularly fine and rapid

- Drives and bearings don’t contact with the mixed material directly, so there is no risk of product contamination by lubricants and others.

- The sealing devicedoesn’t touch the mixed/dry product directly, thereby minimizing maintenance costs.

- Drying temperature is from –20° to +800° C.

- Heat transfers through double jacket, half pipe, shaft and screw

- Thanks to the construction, the heating surface is larger, and the drying time required is shorter.

- Through persistent stirring and close contact between the product and the heating wall, the heat transfer performance exceeds the average level

- Heating medium: steam, hot oil, water or electric heating for high temperature, refrigerant: brine or water

- Pressure in product and heating: -1 to +40 bar

- Raw materials: carbon steel, high-quality stainless steel, such as Hastelloy

- Compared with other series, the speed is lower

- Larger effective volume and better residual emptying performance

- Excellent gasification performance - the evaporation process is almost continuously controllable

- Compared with conical spiral powder mixing equipment, it has less interference and lower maintenance cost.



Model and Design


As a result of Wuxi Zhanghua Pharmaceutical Equipment of nauta conical dryer application field is rich and diverse, it is necessary to find a suitable solution according to specific needs. The structure of the equipment is solid and durable, which is essential in environmental technology, but not important in pharmaceutical industry, while FDA-compliant sealing devices are necessary in pharmaceutical industry, but not important in environmental technology.


- Structural design: single or double spiral

- Special specification design for the pharmaceutical industry is available

- It is designed and manufactured according to GMP and CIP standards, in compliance with FDA, EHEDGE and HACCP standards

- Automation and certified CIP technology for closed machines

- Types of shaft sealing systems: seal box and shaft seal ring, maintenance-free professional lip-shaped seal ring, seal slip ring

- End mills/lump breakers and other types of end mills for different products are applied

- Valves, sliders, ball-segment valves or spheres are used as discharge components.

- Build-in sampler, temperature sensor and other devices

- Containment system included

Case Introductio of Wuxi Zhanghua Pharmaceutical Equipment 

Successful Case of Nauta Conical Dryer

Model: 2000L

Industry: Pharmaceutical

Task: API Drying

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