Fluid Bed Dryer in Pharma Industry

 Fluid bed dryers, as the name implies, are used to dry products such as granules, tablets, powders, fertilizers, and plastics. They can also be used to dry a variety of other materials.

 

FBD Fluid bed dryers operate on the principle of fluidization, which is the process by which a material is transformed from a static solid-like state to a dynamic fluid-like state. In this method, hot gas or air is injected into the region containing the material through a perforated distribution plate. This hot gas flows through the crevices between solid particles, causing them to expand and contract. In proportion to the rise in gas or air velocity, the upward forces exerted on the particles increase, forcing them to equalize with the gravitational forces exerted below them.

 

This results in a state of fluidization, in which the particles are suspended in what appears to be a boiling bed of liquid, creating the appearance of a bubble. Previously impermeable objects can now flow as easily as a liquid. Each particle is in direct touch with and surrounded by the hot gas or air, resulting in a drying process that is both efficient and consistent in its drying.

 

Fluidized bed granulation

 

Powders can be difficult to work within a variety of applications across a wide range of industries. They are poorly packed, lack homogeneity, and do not flow smoothly when it comes time to move them. Because of this, powders must be crystallized into granules that have a higher density while also having superior flowability and homogeneity. Granulation is used in pharmaceutical manufacture, to aggregate multiple raw powder materials to generate larger granules of drug substances or active pharmaceutical ingredients.

 

Granulation systems can be used in conjunction with fluid bed dryer granulator to complete the drying, mixing, granulation, finishing, and cooling activities all in the same process.

 

The Pharmaceutics Industry's reliance on Dryers

 

While it is true that fluidized bed drying may be applied in a range of industries, it is unquestionably having the greatest impact on the pharmaceutical industry. When pharmaceutical granules and powder are dried in a fluid bed dryer machine, the moisture content of the product can be reduced in a consistent fashion. Drying products using fluid bed drying technology has substituted the conventional method of drying products on trays, resulting in significantly faster drying durations and more consistent drying conditions, resulting in a more homogenous end product.

 

In many cases, fluid bed dryers are the most effective solution for drying materials, but this is especially true for products in the pharmaceutical business. When using the system, the temperature of the incoming air can be regulated to ensure that the proper amount of moisture is evaporated off the surface of the granule. The formation of a surface crust due to an excessively high inlet air temperature can prevent moisture from being transferred to the surface, hence delaying rather than speeding up the drying process.

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