What is the principle of fluidized bed reactor?

At lower fluid velocities, the solids remain in place as the fluid passes through the voids in the material. This is known as a packed bed reactor. As the fluid velocity is increased, the reactor will reach a stage where the force of the fluid on the solids is enough to balance the weight of the solid material.

How does a CFB boiler work?

In the cyclone the heavier particles separate from the gas and falls to the hopper of the cyclone. This returns to the furnace for recirculation. Hence the name Circulating Fluidized Bed combustion. The hot gases from the cyclone pass to the heat transfer surfaces and go out of the boiler.

What is PF boiler?

A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal (also known as powdered coal or coal dust since it is as fine as face powder in cosmetic makeup) that is blown into the firebox.

Where is fluidization used?

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 are the applications of circulating fluidized bed reactors?

The circulating fluidized bed reactors have been widely used in various industrial processes such as gasification and coal combustion.

How many holes does a fluidized bed reactor have?

An experimental fluidized bed reactor has a 2.5 cm in diameter and 230 cm in height, and the distributor has 32 holes and each hole was 2 mm in diameter. 200 mesh net was put on the distributor to prevent particles from falling down. The cyclone was made by standard proportion to collect fine particles.

What is the difference between a fluidized bed reactor and membrane?

The first investigated case is a fluidized bed reactor with several membrane tubes, which are introduced from the bottom of the reactor. The second case is a fluidized bed reactor with submerged membranes, while in the third one membranes are introduced horizontally.

Who invented the fluidized bed reactor?

One of the first United States fluidized bed reactors used in the petroleum industry was the Catalytic Cracking Unit, created in Baton Rouge, LA in 1942 by the Standard Oil Company of New Jersey (now ExxonMobil ). This FBR and the many to follow were developed for the oil and petrochemical industries.