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Title	Pulse Firing Applied to Heat Treating
Creator	Chouinard, Jean-Guy
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1989
Spatial Coverage	presented at Short Hills, New Jersey
Abstract	This paper will present the results obtained during a demonstration project at Canadian Steel Foundry (CSF) in Montreal, where a conventional car bottom gas furnace was retrofitted with a pulse firing system. CSF is involved in melting and casting of metals followed by appropriate heat treament of the parts.The main objective of the demonstration project is to measure energy savings resulting from the following modifications brought to the heat treating furnace: - reconstruction of the furnace using ceramic fiber insulation. - reduction of the number of chimneys (from 10 to 2) and use of automatic flue dampers. - installation of a pulse firing system. The other objectives were to assess the product quality and productivity increase.We will first describe the characteristics of high temperature processes and how pulse firing systems are adapted to this application. Then we will present results and after the modifications. break down the energy fibers,automatic dampers and results will be discussed.
Type	Text
Format	application/pdf
Language	eng
Rights	This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications	Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician	Cliodhna Davis
ARK	ark:/87278/s6wq06bs
Setname	uu_afrc
ID	5496
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6wq06bs

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Title	Page 5
Format	application/pdf
OCR Text	Show actual widens principally because the treatment is much longer (37 hours instead of 17) thus emphasizing the effect of the continuous larger measured flue losses. Table 5 gives an allocation of the energy savings for both treatment.If we define: A: saving due to new insulation B: saving due to less infiltration (dampers effect) C: saving due to pulse firing (flue losses) we thus have the following results: A B C Treatment 84 18609794 BTU 49028639 36169549 13 36 26 Treatment 85 42838994 BTU 112771330 58477106 13 34 20 It must be realized that the damper effect also acts upon item C.Nevertheless the user has pointed out that pulse firing provides a precise control of the temperature in the furnace ·ensuring a good product quality; this is the main advantage of pulse firing. Table 6 shows the economic results.The simple payback period is about one year for the type of modifications brought to the furnace. TABLE 1 TEST DESCRIPTION A)Damper test: 1. 100°F to 500°F 2. 5000 F 3. SOOoF to 10000 F 4. 10000F B)Treatment N0 85: 1. 1000 F to 8000 F 2. 800°F to 14QOoF 3. 14000 F to 16500 F 4. 16500F C)Treatment N0 84: in 1.5 hour for 1.0 hour in 2.0 hour for .2 hour in 9.7 hours in 7.3 hours in 11 hours for 9.0 hours ----------------------------------------------------------------- 1. 100°F to 8000 F 2. 800°F to 11000F 3. 11000 F in 4.2 hours in 1.8 hour for 11 hours
Setname	uu_afrc
ID	5490
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6wq06bs/5490