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Title: Drying of pulverized material with heated condensible vapor

Abstract

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 cylindricalmore » 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.« less

Inventors:
 [1]
  1. Oswego, IL
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
865878
Patent Number(s):
4594793
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /34/

Citation Formats

Carlson, Larry W. Drying of pulverized material with heated condensible vapor. United States: N. p., 1986. Web.
Carlson, Larry W. Drying of pulverized material with heated condensible vapor. United States.
Carlson, Larry W. Wed . "Drying of pulverized material with heated condensible vapor". United States. https://www.osti.gov/servlets/purl/865878.
@article{osti_865878,
title = {Drying of pulverized material with heated condensible vapor},
author = {Carlson, Larry W},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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