Agglomeration process in the fluidized bed, the effecting parameters and some applications

Abstract

The agglomeration process has been commonly used to improve the functional properties of powder products to form larger agglomerates. Agglomeration provides a granular structure to powders, reduce the dusting and improving their characteristics, such as storage stability, wettability, dispersibility, and solubility. This process can be performed by different methods, one of which is fluidized bed agglomeration widely used in food processing since the agglomerates produced by this technique have high porosity, low density, and good mechanical resistance. At the same time, this process is influenced by many factors; e.g., inlet air temperature, air velocity, mixing rate, and properties of the binder agents. Inlet air temperature affects the mass and heat transfer; air velocity prevents caking and accelerates mass and heat transfer; mixing rate allows mixing the binder agent uniformly over the particles; and the properties of the binder agent, such as concentration and viscosity have an impact on the properties of the final product. These four factors should be well known and controlled so that the agglomerates produced have the desired properties. Furthermore, the use of fluidized bed agglomeration results in products that can be used in widespread areas and in high quantities, and this method also creates the opportunity to utilize excess foods not consumed.

Electrically Heated Fluidized Beds─A Review

“…EHFB agglomeration processes are widely used in the food industry for producing staples, such as powdered milk and instant coffee. Typically, the inlet air is resistance heated . It is important to control the temperature of the inlet air, because if the inlet air temperature is too low, the agglomeration process will take too long, and if the temperature is too high, sufficient wetting cannot be achieved to adequately agglomerate the particles.…”

Hydraulic Regularities of Fluidized Bed During Encapsulation of Organo-mineral Fertilizers

“…In [19], the authors studied the influence of factors such as inlet air temperature, gas flow rate, moisture content, mixing rate, and binding agent properties on the fluidized bed agglomeration process.…”

Encapsulation by complex coacervation of total flavonoids and total phenols of methanol extract of Anacardium occidentale L. (Anacardeaceae) obtained by microwave assisted extraction

“…In order to minimize the negative aspects, several techniques have been developed to implement different formulations to suit different applications. Nowadays, powder formulation has become one of the most attractive methods for immobilization and protection of active ingredients (Yuksel et al, 2018). To achieve this powder formulation, two main techniques have been developed following the example of adsorption and coacervation encapsulation (Yuksel et al, 2018).…”

“…Nowadays, powder formulation has become one of the most attractive methods for immobilization and protection of active ingredients (Yuksel et al, 2018). To achieve this powder formulation, two main techniques have been developed following the example of adsorption and coacervation encapsulation (Yuksel et al, 2018). Coacervation can be simple or complex: Simple coacervation involves only a single polymer with the addition of strongly hydrophilic agents into the colloidal solution and complex coacervation, two or more polymers are used (Lv et al, 2012).…”