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Either of these approaches is quite satisfactory for applications involving constant pressure operation but is inadequate for variable pressure applications due to the variations in temperature within the superheater and the large changes in spray flow caused by variations in operating pressure.
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www.freepatentsonline.com/4969084.html
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Thus, in case of breakage, each tube may be plugged from both ends thereof without the necessity of opening the casing of the separator-superheater for the purpose (and without the necessity of entering the separator-superheater to perform the plugging operation), because both chambers 12 and 13, and, correspondingly,
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www.freepatentsonline.com/3693599.html
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US Patent 4969084 - Superheater spray flow control for variable pressure operation. US Patent Issued on November 6, 1990. Estimated Patent Expiration Date: ...
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www.patentstorm.us/patents/4969084/claims.html
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The required superheater absorption is also determined based on actual unit operating conditions including the pressures at various locations within the ...
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www.patentstorm.us/patents/4969084/description.html
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Title, Superheater Tube Corrosion in Changing Operation Conditions in Recovery Boilers. Authors, Martti Makipaa and Maria Oksa, VTT Manufacturing Technology ...
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www.onepetro.org/mslib/servlet/onepetropreview?id=NACE-...
www.onepetro.org/mslib/servlet/onepetropreview?id=NACE-01424&soc=NACE&speAppNameCookie=ONEPETRO
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Nizhnekamsk. During operation the whole line had to be stopped several times because of failure of the superheater for the ethyl benzene charge. ...
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www.springerlink.com/index/JK80218X237T4753.pdf
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After a 1-year and 2-year operation, the extent of the corrosion was examined and no significant corrosion nor any prominent deterioration of the tube thickness was observed. Thus, the superiority of the corrosion resistance of the new material "QSX5"was confirmed.
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www.hitachizosen.co.jp/english/lab/techrev/2003_e/6401o...
www.hitachizosen.co.jp/english/lab/techrev/2003_e/6401oer.html
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for modelling the platen superheater operation. In order to compute these transient values, the fuel mass flow should be determined first. To find it, a ...
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journals.pepublishing.com/index/2H1365K26642124H.pdf
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Note also that the path traversed by the steam is much smaller compared to that in the high pressure case and hence the lower pressure drop.In the future case of high pressure operation,1-10 in pipe for inlet and outelet and the steam enters and leaves the superheater in counter flow fashion as shown.
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vganapathy.tripod.com/hplpstm.html
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