Product Introduction
  The disc continuous dryer is an efficient conduction-type continuous drying equipment. Its unique structure and working principle determine its characteristics such as high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, and good operating environment. It is widely used in drying operations in industries such as chemicals, pharmaceuticals, pesticides, food, feed, and agricultural product processing. It has been well-received in practical applications across various industries. Currently, it is manufactured in three types: atmospheric, sealed, and vacuum, with four specifications: 1200, 1500, 2200, and 3000. Three material options are available: A (carbon steel), B (stainless steel for parts in contact with materials), and C (based on B, with stainless steel for steam pipelines, main shaft, and support, and stainless steel lining for the cylinder and top cover). The drying area ranges from 4 to 180 m², with hundreds of models in the series, and supporting auxiliary equipment can be provided to meet users' drying needs for various materials.
Working Principle
  Wet materials are continuously fed from the feeder to the first drying disc at the top of the dryer. The rake arm with rake blades rotates to continuously turn and spread the materials. The materials flow across the surface of the drying disc along an exponential spiral path. On the small drying disc, materials are moved to the outer edge and fall onto the outer edge of the large drying disc below. On the large disc, materials move inward and fall from the central discharge port to the next small disc below. The small and large drying discs are arranged alternately up and down, allowing materials to continuously flow through the entire dryer. Heating media, such as saturated steam, hot water, or thermal oil, are introduced into the hollow drying discs from one end and discharged from the other. Dried materials fall from the last drying disc to the bottom of the shell and are finally moved by the rake blades to the discharge port. Moisture escapes from the materials and is discharged through the moisture exhaust port on the top cover. For vacuum-type disc dryers, moisture is discharged through the vacuum pump port on the top cover. Dry materials discharged from the bottom can be directly packaged. By adding auxiliary equipment such as fin heaters, solvent recovery condensers, bag filters, dry material recirculation mechanisms, and induced draft fans, the drying capacity can be enhanced, paste-like and heat-sensitive materials can be dried, solvents can be conveniently recovered, and pyrolysis and reaction operations can be performed.

Performance Features
(I) Easy Control and Strong Applicability
◎ By adjusting the material layer thickness, main shaft speed, number of rake arms, and rake blade type and size, the drying process can be optimized.
◎ Each drying disc can be individually supplied with hot or cold media to heat or cool the materials, allowing accurate and easy temperature control.
◎ The residence time of the material can be adjusted.
◎ The material flow is unidirectional with no back-mixing, resulting in uniform drying, stable quality, and no need for re-mixing.
(II) Simple and easy operation
◎ The start-up and shutdown operations of the dryer are very simple.
◎ After stopping the feed, the rake blades for material conveying can quickly empty the material inside the dryer.
◎ Through the sight glass of the special large inspection door, the interior of the equipment can be carefully cleaned and observed.
(III) Low energy consumption
◎ The material layer is very thin, the main shaft speed is low, the power required for the material conveying system is small, and the electricity consumption is low.
Conductive heat drying ensures high thermal efficiency and low energy consumption.
(4) Good operating environment: solvent can be recovered, and dust emissions meet requirements.
◎ Atmospheric type: Due to low airflow velocity inside the equipment and a humidity distribution that is higher at the top and lower at the bottom, dust rarely floats to the top, so the exhaust gas from the top moisture discharge port contains almost no dust.
◎ Sealed type: Equipped with a solvent recovery device, organic solvents in the moisture-carrying gas can be easily recovered. The solvent recovery device is simple with high recovery efficiency. For flammable, explosive, toxic, and easily oxidized materials, nitrogen can be used as the moisture-carrying gas for closed-loop circulation, ensuring safe operation. Particularly suitable for drying flammable, explosive, and toxic materials.
◎ Vacuum type: The disc dryer operating under vacuum conditions is especially suitable for drying heat-sensitive materials.
(5) Easy installation and small footprint.
◎ The dryer is shipped and transported as a complete unit, requiring only hoisting and positioning, making installation very easy.
◎ Due to the layered arrangement of drying discs and vertical installation, even with a large drying area, the footprint remains very small.

Technical Features
(I) Drying Discs
◎ Design Pressure: Typically 0.4MPa, maximum up to 1.6MPa.
◎ Maximum Operating Pressure: Generally ≤0.4MPa, maximum up to 1.6MPa.
◎ Heating Medium: Steam, hot water, thermal oil. Use hot water for drying disc temperatures of 100°C; use ≤0.4MPa saturated steam or superheated steam for 100°C to 150°C; use thermal oil for 150°C to 320°C; for temperatures >320°C, use electricity, thermal oil, molten salt, etc.
(II) Material Conveying System
◎ Main Shaft Speed: 1 to 10 rpm, with electromagnetic or variable frequency stepless speed regulation.
◎ Rake Arms: Each layer of drying discs has 2 to 8 rake arms fixed to the main shaft.
◎Rake blades: Hinged on the rake arms, they can float up and down with the disc surface to maintain contact, available in various forms.
◎Rollers: For materials prone to caking or requiring crushing, rollers are added at appropriate positions to enhance heat transfer and drying processes.
(3) The shell has three types: atmospheric, sealed, and vacuum.
◎Atmospheric type: Cylindrical or octagonal prism shape, with integral and split structures. The main inlet and outlet pipes for the heating medium can be inside or outside the shell.
◎Sealed type: Cylindrical shell, capable of withstanding an internal pressure of 5 KPa. The main inlet and outlet pipes for the heating medium can be inside or outside the shell.
◎Vacuum type: Cylindrical shell, with a design pressure of 0.1 MPa. The main inlet and outlet pipes for the heating medium are inside the shell.
(4) Air heater
Generally used in cases with large evaporation rates to enhance drying efficiency.
Applicable Materials
Drying, Pyrolysis, Combustion, Cooling, Reaction, Sublimation
Organic chemical products, Inorganic chemical products, Pharmaceuticals, Food, Feed, Fertilizer