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Title: Adiabatic radiant hot-air burner. Annual report, September 1988-September 1989

Abstract

Hot air is a dominant means of industrial product heating or drying and is commonly used for processes such as: agricultural dehydrating, greenhouse and form space heating, paper and textile drying, and pharmaceutical production. Direct gas-fired burners are the preferred method of generating the hot air. Direct systems have a higher thermal efficiency than indirect gas alternatives and have a lower operating cost than electric designs. The major disadvantage of direct gas drying or heating is that the byproducts of combustion (mainly NOx and CO) can damage products. The CO and NO and NOx emissions of existing hot air equipment can be significantly reduced through the use of high excess air radiant burners. During this past year, two fundamentally different low NOx/CO radiant burner concepts were tested. One was a conventional outward fired ceramic fiber burner placed inside a refractory chamber, and the other was a newly designed inward fired ceramic fiber burner. Bench scale burners near 100 MBtu/hr in capacity were fabricated and tested. Both burner styles exhibited near adiabatic operation which permitted high excess air operation (near 100 percent) and subsequently low emissions (CO < 5 ppm, NOx < 1 ppm). Both the inward and outward fired benchmore » scale burner concepts were life tested for approximately 1000 hours with no unusual signs of degradation. The inward fired burner was scaled-up to 300 MBtu/hr for laboratory testing, and these tests are now in progress. In conjunction with the bench scale and lab scale testing, fundamental burner improvement work was performed to increase the durability and lower the cost of ceramic fiber radiant burners.« less

Authors:
; ;
Publication Date:
Research Org.:
Alzeta Corp., Santa Clara, CA (USA)
OSTI Identifier:
6367071
Alternate Identifier(s):
OSTI ID: 6367071
Report Number(s):
PB-91-112748/XAB; ALZETA--89-7037-153
CNN: GRI-5088-234-1741
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CARBON MONOXIDE; AIR POLLUTION ABATEMENT; GAS BURNERS; DESIGN; NITROGEN OXIDES; AIR HEATERS; BENCH-SCALE EXPERIMENTS; CERAMICS; DRYING; EMISSION; FABRICATION; FUEL-AIR RATIO; GREENHOUSES; INDUSTRIAL PLANTS; NITRIC OXIDE; PERFORMANCE TESTING; PROCESS HEAT; PROGRESS REPORT; SPACE HEATING; BUILDINGS; BURNERS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DOCUMENT TYPES; ENERGY; HEAT; HEATERS; HEATING; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; POLLUTION ABATEMENT; TESTING 034000* -- Natural Gas-- Combustion; 320303 -- Energy Conservation, Consumption, & Utilization-- Industrial & Agricultural Processes-- Equipment & Processes

Citation Formats

Tidball, R.K., Marshall, B.N., and Nikzad, A.A. Adiabatic radiant hot-air burner. Annual report, September 1988-September 1989. United States: N. p., 1990. Web.
Tidball, R.K., Marshall, B.N., & Nikzad, A.A. Adiabatic radiant hot-air burner. Annual report, September 1988-September 1989. United States.
Tidball, R.K., Marshall, B.N., and Nikzad, A.A. Fri . "Adiabatic radiant hot-air burner. Annual report, September 1988-September 1989". United States.
@article{osti_6367071,
title = {Adiabatic radiant hot-air burner. Annual report, September 1988-September 1989},
author = {Tidball, R.K. and Marshall, B.N. and Nikzad, A.A.},
abstractNote = {Hot air is a dominant means of industrial product heating or drying and is commonly used for processes such as: agricultural dehydrating, greenhouse and form space heating, paper and textile drying, and pharmaceutical production. Direct gas-fired burners are the preferred method of generating the hot air. Direct systems have a higher thermal efficiency than indirect gas alternatives and have a lower operating cost than electric designs. The major disadvantage of direct gas drying or heating is that the byproducts of combustion (mainly NOx and CO) can damage products. The CO and NO and NOx emissions of existing hot air equipment can be significantly reduced through the use of high excess air radiant burners. During this past year, two fundamentally different low NOx/CO radiant burner concepts were tested. One was a conventional outward fired ceramic fiber burner placed inside a refractory chamber, and the other was a newly designed inward fired ceramic fiber burner. Bench scale burners near 100 MBtu/hr in capacity were fabricated and tested. Both burner styles exhibited near adiabatic operation which permitted high excess air operation (near 100 percent) and subsequently low emissions (CO < 5 ppm, NOx < 1 ppm). Both the inward and outward fired bench scale burner concepts were life tested for approximately 1000 hours with no unusual signs of degradation. The inward fired burner was scaled-up to 300 MBtu/hr for laboratory testing, and these tests are now in progress. In conjunction with the bench scale and lab scale testing, fundamental burner improvement work was performed to increase the durability and lower the cost of ceramic fiber radiant burners.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {6}
}

Technical Report:
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