Spray Rotary Dryer-Granulator

The All-in-One Solution for Direct Transformation of Liquid Slurries into Dry, Uniform Granules

The Spray Rotary Dryer-Granulator is an innovative, all-in-one solution that integrates spray drying with rotary granulation. Designed for slurry or high-moisture feedstock, it efficiently dries and forms uniform, spherical granules in a single, continuous process, significantly reducing energy consumption and plant footprint compared to separate drying and granulation units.

Spray Rotary Dryer-Granulator

Key Features

  • Combined Process

    Unifies drying and granulation within a single, sealed drum for streamlined operation.

  • Hot Air Spray System

    Utilizes high-efficiency nozzles and controlled hot air flow for rapid moisture evaporation.

  • Rotary Tumbling Action

    The rotating drum provides gentle lifting and cascading of particles, forming uniform granules through coalescence.

  • Adjustable Parameters

    Granule size can be influenced by adjusting rotation speed, air temperature, feed rate, and slurry viscosity.

  • Closed-Loop Design

    Minimizes dust emissions and heat loss, promoting environmental compliance and energy efficiency.

Advantages

  • Space & Cost Saving

    Eliminates the need for a separate dryer, reducing equipment investment and factory layout requirements.

  • Energy Efficient

    Recovers and utilizes heat effectively within the combined process, lowering thermal energy consumption per ton of product.

  • High-Quality Granules

    Produces strong, spherical, dust-free granules with excellent solubility and handling properties.

  • Ideal for Slurries

    Perfect for liquid raw materials, waste streams, or formulations requiring liquid binding agents.

  • Reduced Fines

    Integrated process minimizes the generation of fine particles, improving overall yield.

Applicable Raw Materials

  • Fertilizer Slurries

    Such as ammonium nitrate, urea, or NPK compound fertilizer slurries.

  • Wet Organic Materials

    Manure slurries, biogas residue, or moist organic waste.

  • Mineral Suspensions

    Clay-based or other mineral mixtures in slurry form.

  • Formulations Requiring Liquid Binders

    Materials where liquid binders (e.g., molasses, certain acids) are essential for granule formation.

Basic Structure & Components

Spray Rotary Dryer-Granulator
Rotary Drum

The main, slightly inclined cylinder where drying and granulation occur.

Hot Air Furnace & Ducting

Provides controlled, high-temperature air flow.

Spray Nozzle System

Centrally located for atomizing the feed slurry into fine droplets.

Lifting Flights (Internals)

Attached to the drum’s inner wall to lift and cascade material for optimal heat transfer and granule growth.

Drive Unit

Comprising motor, reducer, and trunnion wheels for smooth drum rotation.

Feed System

Includes slurry pump and pipeline for consistent material supply.

Exhaust & Dust Collection System

Removes moist air and captures any fine particles.

Control Panel

For monitoring and adjusting temperature, speed, and feed rate.

Technical Data

Specification

Shell

Production Capacity

Flow Direction

Reducer

Motor

Size (LxWxH)

Weight

I.D. mm

L mm

Slope (°)

Rev r/min

Downstream

Downstream

Model

Ratio

Model

Power

φ3×13

3000

13000

1.7

5

6-8

ZLH85

35.50

Y250M-4

55

16500x5500x5200

75.3

φ3.2×14

3200

14000

1

4.9

15

Zl100

35.50

Y280M-4

90

17000x5600x5500

110.5

φ4.25×14

4250

14000

1.5

4.1

12-16

ZSY500

40.00

Y315M2-4

160

18400x6510x8000

152.0

φ4.25×16

4250

16000

1.5

4.1

13-18

ZSY500

40.00

Y355M-4

185

20400x6540x8000

160.0

φ4.5×16

4500

16000

1

4.1

17-20

ZSY560

40.00

Y-355M1-4

220

20835x5048x8035

185.0

φ4.5×18

4500

18000

1.5

4.1

18-21

ZSY560

40.00

Y-355M1-4

220

23342x5048x8150

197.0

φ4.75×18.5

4750

18500

1.5

4.1

19-24

ZSY560

25.00

YKK4501-4

250

23500x6300x9623

232.0

Key Differentiators vs. Other Granulators

Offers a compact, integrated process that saves significant space, capital cost, and energy by eliminating material transfer between two separate units.

Has an integrated high-temperature spray drying system, making it uniquely suited for liquid/slurry feeds, whereas standard rotary drums typically require pre-moistened solid powder.

Capable of handling much higher initial moisture content directly, while disc and extrusion granulators require feedstock to be at a suitable agglomeration moisture level beforehand.

Provides the most direct and efficient route from liquid/slurry to dry granules in one step, offering superior process simplicity for specific wet raw materials.