subject: fluid bed dryer and all kinds drying equipment [print this page] fluid bed dryer and all kinds drying equipment
A fluid bed dryer for processing a particulate material includes a series of chambers separated by longitudinally extending common walls and connected by turn-around sections to provide a serpentine path for the material. Each turn-around section is open to adjacent chambers at one end of one of the common walls to receive and turn particulate material distributed across the width of one of the chambers through an arcuate path and deliver the material to the other chamber. Each of the chambers and turn-around sections have a base including a number of gas introduction openings oriented to introduce gas in a specific direction to fluidize and move the particulate material in that direction. The gas introduction openings in the turn-around sections are oriented to successively receive and turn incremental vertical columns of the particulate material in accordance with the distance each incrmental vertical column is spaced from the common wall.drying equipment.
A fluid bed dryeras defined by claim 1, wherein the base of each of said chambers is comprised of at least one plate having lateral edges parallel to said common wall and an end edge at said one end of each chamber open to a turn-around section and the base of said turn-around section includes at least three bottom plates having a pair of edges that intersect at an angle and said at least three bottom plates are inset with each of said intersecting edges of each bottom plate abutting an edge of an adjacent plate at the base of said turn-around section and said chambers.
This invention teaches an improved fluid bed dryer design and more specifically, an improved fluid bed base or bottom plate design wherein each incremental volume of the material being processed adjacent an incremental area of the gas distribution bottom plate is provided with that energy required to maintain the bed in a fluid condition and to transport the material adjacent the plate in a specific desired direction away from that incremental area of the plate and to an area from which additional material is being removed in a specific direction with a minimum loss of fines.
The object of the present invention is to provide an improved fluid bed dryer particularly suited for drying a readily decrepitateable, feed material of broad particle size distribution which is capable of sustained operation without process interruption because of fluidization or material transport failure while continuously producing a product having a minimum of fines.
