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E-mail
925633677@qq.com
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15051989720
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Sanhekou Industrial Park, Zhenglu Town, Changzhou
Changzhou Xianzhu Drying Equipment Co., Ltd
Process principle of hollow blade dryer
Date: 2025-05-12Read: 8
The hollow blade dryer achieves efficient and energy-saving drying effects through dual conduction heating and a large heat transfer area design, combined with mechanical stirring and self-cleaning mechanisms. The process principle mainly includes the following points:
1、 Core structure
1. W-shaped shell design
The main body is a W-shaped shell with a jacket, which together with the internal hollow shaft forms the heating surface.
2. Hollow blade system
Wedge shaped hollow blades are densely arranged on paired low-speed rotating hollow shafts, both of which are connected to heat carriers (steam, thermal oil, or hot water).
2、 Heating and heat transfer mechanism
1. Dual heating mode
The heat carrier is heated simultaneously through the shell jacket and hollow blade shaft, forming a dual heat conduction surface.
2. Efficient heat conduction
The heat transfer area per unit volume is large (with wedge-shaped blades densely arranged), and the temperature range of the heat carrier covers -40~320 ° C. The heat directly acts on the material, and the heat loss carried by the gas is minimal.
3、 Material handling process
1. Material motion characteristics
The material moves in a spiral trajectory under the stirring of the blade, continuously flipping and fully contacting the heating surface.
2. Drying stage
Water evaporation: After wet materials come into contact with a hot surface, water evaporates, and the evaporation process is divided into two stages: constant rate and deceleration;
Self cleaning function: The relative movement between the material and the wedge-shaped blade generates shear force, automatically removing surface residues and maintaining heat transfer efficiency.
4、 Environmental Control and Energy Conservation
1. Closed system operation
Volatile gases are collected and processed through closed pipelines to reduce environmental pollution.
2. Thermal energy recycling
A small amount of gas carries away moisture, and the condensation system recovers solvent and waste heat, with a thermal efficiency of up to 80% -90%.
5、 Application Features
1. Suitable materials: granules, powders, pastes, and high viscosity sludge;
2. Operation mode: It can achieve continuous or intermittent operation, suitable for temperature sensitive or high-temperature materials.
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