Drying of pulverized material with heated condensible vapor

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865878

Carlson, Larry W ^[1]

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1. Oswego, IL

Apparatus for drying pulverized material utilizes a high enthalpy condensable vapor such as steam for removing moisture from the individual particles of the pulverized material. The initially wet particulate material is tangentially delivered by a carrier vapor flow to an upper portion of a generally vertical cylindrical separation drum. The lateral wall of the separation drum is provided with a plurality of flow guides for directing the vapor tangentially therein in the direction of particulate material flow. Positioned concentrically within the separation drum and along the longitudinal axis thereof is a water-cooled condensation cylinder which is provided with a plurality of collection plates, or fins, on the outer lateral surface thereof. The cooled collection fins are aligned counter to the flow of the pulverized material and high enthalpy vapor mixture to maximize water vapor condensation thereon. The condensed liquid which includes moisture removed from the pulverized material then flows downward along the outer surface of the coolant cylinder and is collected and removed. The particles travel in a shallow helix due to respective centrifugal and vertical acceleration forces applied thereto. The individual particles of the pulverized material are directed outwardly by the vortex flow where they contact the inner cylindrical surface of the separation drum and are then deposited at the bottom thereof for easy collection and removal. The pulverized material drying apparatus is particularly adapted for drying coal fines and facilitates the recovery of the pulverized coal.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4594793
• OSTI ID: 865878
• Country of Publication: United States
• Language: English

Related Subjects

drying
pulverized
material
heated
condensible
vapor
apparatus
utilizes
enthalpy
condensable
steam
removing
moisture
individual
particles
initially
wet
particulate
tangentially
delivered
carrier
flow
upper
portion
vertical
cylindrical
separation
drum
lateral
wall
provided
plurality
guides
directing
therein
direction
positioned
concentrically
longitudinal
axis
water-cooled
condensation
cylinder
collection
plates
fins
outer
surface
cooled
aligned
counter
mixture
maximize
water
thereon
condensed
liquid
removed
flows
downward
coolant
collected
travel
shallow
helix
due
respective
centrifugal
acceleration
forces
applied
thereto
directed
outwardly
vortex
contact
inner
deposited
bottom
easy
removal
particularly
adapted
coal
fines
facilitates
recovery
coal fines
individual particle
condensable vapor
vapor mixture
pulverized material
applied thereto
cylindrical surface
vapor flow
particularly adapted
pulverized coal
water vapor
particulate material
outer surface
upper portion
longitudinal axis
vortex flow
forces applied
inner cylindrical
condensed liquid
vertical cylindrical
individual particles
lateral surface
removing moisture
drying apparatus
particles travel
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