What are fluidized bed used for?
Fluidized beds have been used in technological processes such as: cracking and reforming of hydrocarbons (oil), carbonization and gasification of coal, ore roasting, Fischer-Tropsch synthesis, polyethylene manufacturing, limestone calcining, aluminum anhydride production, granulation, vinil-chloride production.
What are the applications of fluidization?
Typical food processing applications of fluidization include freezing and cooling, drying, puffing, freeze drying, spray drying, classification and blanching and cooking. These processes involve heat and mass transfer to or from the food material, which can be rapidly achieved from fluidization.
What is fluid bed technology?
Fluid bed technology is used for cooling, heating and drying of bulk solids materials. Fluid bed heat exchange takes place by passing a gas (most commonly air) through a perforated distributor plate which then flows through a layer (bed) of solids.
What are the advantages of fluidized bed combustion?
Advantages of Fluidized Bed Combustion Boilers:-
- High Combustion Efficiency.
- Reduction in Boiler Size.
- Fuel Flexibility.
- Ability to Burn Low Grade Fuel.
- Ability to Burn Fines.
- Pollution Control.
- Low Corrosion and Erosion.
- Easier Ash Removal – No Clinker Formation.
Why is fluidization important?
These chemical reactions are highly exothermic and fluidization ensures a uniform temperature, minimizing unwanted side reactions, and efficient heat transfer to cooling tubes, ensuring a high productivity.
Why fluidization is required?
Fluidized bed technology in dryers increases efficiency by allowing for the entire surface of the drying material to be suspended and therefore exposed to the air. This process can also be combined with heating or cooling, if necessary, according to the specifications of the application.
How is the temperature maintained in a bubbling fluidized bed?
4. How is the temperature maintained in a bubbling fluidized bed? Explanation: A bubbling fluidized bed gasifier applies inlet from the bottom and moves the bed of fine-grained materials. The temperature is maintained by manipulating the ratio of biomass and gasification agent.
What is minimum fluidization?
Abstract. The minimum fluidization velocity (Umf), defined as the superficial gas velocity at which the drag force of the upward moving gas becomes equal to the weight of the particles in the bed, is one of the most important parameters associated with a fluidized bed system.
Which is an example of fluidized bed technology?
In this chapter, the additional applications of fluidized bed technology are discussed. Examples include uses in the environmental, chemical, and process industries. Fluidized bed technology can be seen to contribute significantly to the high efficiencies and low emissions of these processes.
What are the applications of fluidized bed reactors?
Current Applications for Fluidized Bed Reactors. FBRs are everywhere in the Process Industries. They find broad use in the petroleum and petrochemical industries, as well as numerous chemical industries.
What can a fluidized bed dryer be used for?
Fluidized bed dryers are frequently used with granulation systems and spray dryers for effective drying, blending, granulation, completing and cooling of powdered and granule substances. Fluidized bed dryers are regularly favored over most traditional drying techniques because of their high levels of effectiveness.
