Lab Fluid Bed Dryer

The lab fluidized bed granulator use liquids containing solids, such as solutions, suspensions, or melts, are sprayed into a lab fluidized bed system. Due to the high heat exchange, the aqueous or organic solutions evaporate immediately, and the solids form small particles as starter cores. These are sprayed with other liquids which, after evaporation, form a hard coating around the starter core.

This step is continuously repeated in the fluidized bed granulator so that the granulate grows layer by layer like an onion. Alternatively, a defined volume of suitable starter cores can be provided. In this option, the liquid only serves as a vehicle for the solids that are being applied.

This process variant is often used in a continuous lab fluid bed system with air-classifying discharge. Through the constant removal of the finished granules from the drying room, the amount of particles in the fluidized bed remains constant.

The granules can be very dense because they have grown in layers, and are thus resistant to abrasion. Parameters such as particle size, residual moisture, and solids content can be specifically adapted in order to achieve the most varying product properties. Using spray granulation, medium-sized particles of 50 micrometers to 5 millimeters can be produced.

The Laboratory Fluid Bed Granulator is also used as the dryer function, it is named the Lab fluid bed dryer granulator.

Rich Smart Tech also has industrial fluid bed granulator from 1kg to max 500 kg if high-volume fluid bed granulators are required.

Core Functionality

The material fluidizes in a hot, clean airstream (negative pressure), ensuring uniform heating and rapid heat exchange for high efficiency. With an optimized spray system and enhanced fluidized bed design, Lab Fluid Bed Dryer delivers superior granulation, drying, and coating performance-all in one versatile unit.

Process Flow

1.Air Handling: Cold air is filtered (primary + secondary), heated, and directed into the fluidized bed.

Fluidization & Spray: Powder/granules fluidize while a binder/coating liquid is atomized and sprayed (via two-fluid nozzle).

Granulation: Particles aggregate into granules.

Coating: Uniform thin films form on cores.

3.Drying & Exit: Moisture evaporates and is expelled with exhaust air.

Key Configurations

Top-Spray Granulation:

Binder sprayed onto fluidized powder for granule formation.

Integrated mixing, granulation, and drying; dual-filter dust removal.

High heat exchange accelerates drying.

Bottom-Spray Coating (Wurster Method):

Spray gun embedded at the bed base with a guide cylinder for precise particle trajectory.

Minimized spray distance eliminates material waste, ensuring even coating-ideal for capsules/microparticles.

Advantages of Lab Fluid Bed Dryer

Efficiency: Short processing time, low energy use.

Cost-Effective: No coating loss, reduced production costs.

Flexibility: Single-unit multi-functionality (granulation/coating/drying).

Our Lab Fluid Bed Dryer has following feature will benifits to you.

Enhanced Granulation: Powder granulation improves fluidity and minimizes dust.

Precision Coating: Bottom-spray coating ensures material efficiency and uniform coverage via controlled fluidization.

Multifunctional Design: Single-unit capability for spraying, mixing, granulation, coating, and drying, streamlining processes and supporting R&D.

GMP Compliance: Fully enclosed, modular structure prevents leaks and dust; tool-free disassembly simplifies cleaning and maintenance.

Automated Control: PLC-managed operations with real-time monitoring, alarms, and print-ready reports for parameters (temperature, pressure, fan speed, etc.). Three-level password protection ensures security.

Process Stability: Consistent granulation/coating parameters; quick (1–2 min) online spray gun replacement ensures uninterrupted, repeatable results.

Temperature Regulation: Online material temperature feedback adjusts inlet air and spray settings for optimal process stability.

Smart Spray System: Atomization pressure interlock prevents droplet formation; digital pressure display and auto-stop below thresholds avoid agglomeration.

Efficient Liquid Delivery: Refu pump's easy-install hose and embedded design offer stability, heat resistance (120°C), and OEM compatibility.

Uniform Mixing: Pneumatic stirring tank (SS304, mirror-polished) enables consistent medium blending with stepless speed control.

Air Filtration: Three-stage (primary/medium/HEPA) inlet filtration meets Class 100,000 cleanroom standards.

Optimized Fluidization: Space and airflow design prevent adhesion/accumulation; high-temp plexiglass chamber allows real-time observation.