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Title: Overview of industrial drying needs and competing technologies

Abstract

The drying of solids is a common unit operation throughout industry accounting for about 9 percent of the total energy use in manufacturing. Analyzing the drying equipment selection process and associated energy use is complicated by the wide variety of products dried in industry and the numerous variations in drier designs used to meet those needs. Exact product specifications greatly influence both selection of a drier design and an energy source. Most often the complex mass and heat transfer mechanisms are studied only through pilot or full scale tests, and past successful operating experience is given much greater weight than the prospects for cost savings with an unconventional technology. Energy use in drying is dominated by the use of indirect steam-based technologies. These systems are less efficient than direct fired alternatives, but they assure fuel flexibility and a clean product. They also minimize the chances of product overheating. Natural gas is the second most common energy source providing quick and clean drying, suitable even for food products. Gas is particularly competitive in large volume drying of liquids in spray driers. Coal, oil, and electricity are used in selected markets; coal and oil when contamination is not an issues (ore, wastes)more » and electricity where radiant heating or precise small applications occur. Several new technologies (gas-fired pulsed combustor, electric microwave, and gas or electric infra-red) are entering the drying markets with mixed results. Each provides opportunities to dry certain products more simply, quickly or cleanly.« less

Authors:
; ;
Publication Date:
Research Org.:
Energy and Environmental Analysis, Inc.
OSTI Identifier:
6375446
Alternate Identifier(s):
OSTI ID: 6375446
Report Number(s):
CONF-861146-
Resource Type:
Conference
Resource Relation:
Conference: AIChE winter annual meeting, Miami, FL, USA, 2 Nov 1986
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; DRYERS; REVIEWS; INDUSTRIAL PLANTS; COST BENEFIT ANALYSIS; DESIGN; DRYING; ENERGY EFFICIENCY; FOOD PROCESSING; INFORMATION NEEDS; INFRARED RADIATION; MICROWAVE EQUIPMENT; NATURAL GAS; OPERATION; PULSE COMBUSTORS; RADIANT HEAT TRANSFER; SOLIDS; SPECIFICATIONS; SPRAYS; STEAM; COMBUSTORS; DOCUMENT TYPES; EFFICIENCY; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; ENERGY SOURCES; ENERGY TRANSFER; EQUIPMENT; FLUIDS; FOSSIL FUELS; FUEL GAS; FUELS; GAS FUELS; GASES; HEAT TRANSFER; PROCESSING; RADIATIONS 320303* -- Energy Conservation, Consumption, & Utilization-- Industrial & Agricultural Processes-- Equipment & Processes

Citation Formats

Holmes, J.G., Hedman, B.A., and Salama, S.Y. Overview of industrial drying needs and competing technologies. United States: N. p., 1986. Web.
Holmes, J.G., Hedman, B.A., & Salama, S.Y. Overview of industrial drying needs and competing technologies. United States.
Holmes, J.G., Hedman, B.A., and Salama, S.Y. Wed . "Overview of industrial drying needs and competing technologies". United States.
@article{osti_6375446,
title = {Overview of industrial drying needs and competing technologies},
author = {Holmes, J.G. and Hedman, B.A. and Salama, S.Y.},
abstractNote = {The drying of solids is a common unit operation throughout industry accounting for about 9 percent of the total energy use in manufacturing. Analyzing the drying equipment selection process and associated energy use is complicated by the wide variety of products dried in industry and the numerous variations in drier designs used to meet those needs. Exact product specifications greatly influence both selection of a drier design and an energy source. Most often the complex mass and heat transfer mechanisms are studied only through pilot or full scale tests, and past successful operating experience is given much greater weight than the prospects for cost savings with an unconventional technology. Energy use in drying is dominated by the use of indirect steam-based technologies. These systems are less efficient than direct fired alternatives, but they assure fuel flexibility and a clean product. They also minimize the chances of product overheating. Natural gas is the second most common energy source providing quick and clean drying, suitable even for food products. Gas is particularly competitive in large volume drying of liquids in spray driers. Coal, oil, and electricity are used in selected markets; coal and oil when contamination is not an issues (ore, wastes) and electricity where radiant heating or precise small applications occur. Several new technologies (gas-fired pulsed combustor, electric microwave, and gas or electric infra-red) are entering the drying markets with mixed results. Each provides opportunities to dry certain products more simply, quickly or cleanly.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Conference:
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