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Fluid Bed Granulator

The fluid bed granulator is a method for making free-flowing granulate from liquids. Laboratory fluid bed granulators can be used in different applications in various industries since the product properties can be varied in many ways by setting process technical parameters and configurations. The granules made by the lab fluid bed granulator are suitable for making tablets, and the granules are also for final coating by the laboratory liquid bed coating machine.
Many industrial applications require converting liquid substances into a stable product form with precisely defined properties – whether for further processing as a solid for Pharmaceutical, food products, animal feed, or cleansing agents, for increasing stability in chemical substances, or for handling thermally sensitive products such as enzymes, proteins or micro-organisms. Lab spray granulation in the fluidized bed permits liquids to be directly made into free-flowing granulate with specific product properties. Generally, the granules also have instant properties.
  • FL
  • 8479899990
  • SUS304/SUS316L/Titanium
  • Food/Pharmaceutical/Chemical

Fluid Bed Granulator Introduction

The lab model fluidized bed granulator use liquids containing solids, such as solutions, suspensions, or melts, are sprayed into a 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.

Hywell Machinery also has industrial fluid bed granulator from 15kg to max 500 kg if high-volume fluid bed granulators are required.

Fluid Bed Granulator Specifications














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Air volume

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1.Hywell machinery reserves the right to the design without notice

2.All specifications are as accurate as is reasonably possible, but they are not binding.

Fluid Bed Granulator Application

The FL series lab model fluid bed granulator is widely used in pharmaceutical, chemical, foodstuff and electronic industries.

1. Western medicine

granulating and drying before tableting.

2. Chinese medicine

granulating and drying of concentrated granule.

3. Food

Granulating and drying of instant food, instant health food, coffee, cocoa, milk powder, fruit flavor powder, seasoning.

4. Chemical

Granulating and drying of pigment, dye, synthesis raw material.

Fluid Bed Granulator Description

Heated and purified air flows into the column by a suction fan, the pellet or powder will be in uniform fluid condition inside the column, use one set of filter bags to prevent the leak of powder, and discharge the evaporated water to get drying purposes. If add one more spray gun can spray the binder or active ingredient downward into the uniform fluid powder, whenever the powder combined in granules will be dried to get the required moisture content.

Laboratory Fluid Bed Granulator

The lab top-spray granulator agglomerates finer particles into larger, free flowing granulates in a one-pot process. Ingredients are mixed and preheated by an upward flow of heated air. Granulation occurs by spraying liquid into the fluidized powder. The granules are subsequently dried with heated air. The top-spray granulator can also be used for top-spray coating, layering from liquids and instantizing. Special features include a selection of air distributors and one-pot processing.

Drying of Lab Scale Fluid bed granulator

Warm air is blown through a perforated distributor to rapidly and gently dry the formulation until the required residual moisture content is reached. Moisture evaporated from the product is exhausted with the drying air. Special features include a selection of air distributors and short processing times.

Fluid Bed Granulators Construction Material

Hywell Machinery is able to offer our FL series lab scale fluid bed granulators with contact parts to be built in SS304, SS316L, Titanium, Duplex stainless steel, etc. For the control system of Laboratory scale fluid bed granulators, Hywell machinery has choices on push button, PLC+HMI, and so on, and For the main electrical components of the fluid bed dryer granulator, it can choices the famous brand.

How do the Fluid Bed Granulator works

In a Hywell machinery FL series fluid bed granulator, The powder granule in a vessel (fluid bed) appears in the state of fluidization. It is preheated and mixed with clean and heated air. At the same time, the solution of adhesive is sprayed into the container. It makes the particles become granulating that contain adhesive. Being of unceasingly dry through hot air, the moisture in the granulating is evaporated. The process is carried out continuously. Finally, it forms ideal, uniform, and porous granules.

Fluid Bed Dryer Granulator Advantages

Hywell machinery lab fluid bed dryer granulator had the following advantages over conventional solutions.

1. Use for both drying and granulating processes.

2. Inlet air temperature probe.

3. Product temperature probe (optional).

4.100-micron screen (screens of different sizes upon request).

5. This machine adopts PLC automatic control, all the operations according to the requirements of the user to set the process parameters automatically, it can print all the process parameters (optional), and the original record is true and reliable.

6. Highly polished inner and outer surfaces of the barrel, no dead comer, easy to discharge materials, easy to clear, no cross-contamination.

7. The fluid bed dryer granulator has an enclosed structure, without overflow of power dust

8. The fluid bed dryer granulation have smooth running, reliable performance, and easy operation.

9. The processes of mixing, granulation, and drying are completed in one step inside the machine.

10. Repeated cartridge filter cleaning by compressed air counterblows while drying or granulation processes keep taking place.

11. Easy and quick filter disassembling.


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