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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018020698
pages 183-194

EFFECTS OF SCALING ON PRESSURE DROP AND TUBE WALL TEMPERATURE OF STEAM INJECTION BOILERS REUSING OIL FIELD PRODUCED WATER

Wei Zhang
College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, Shandong, P.R. China, 266580
Bin Li
College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, Shandong, P.R. China, 266580
Liang Gong
Department of Energy and Power Engineering, China University of Petroleum (East China), 66 West Changjiang Rd. Huangdao District, Qingdao 266580, PR. China

Краткое описание

Reusing produced water in steam boilers can save fresh water. However, because of the strong scaling characteristics of produced water, the operation condition of a steam injection boiler varies after reusing the produced water. A computing program is developed to theoretically study the effects of scaling on the pressure drop and the tube wall temperature of a steam injection boiler, and to finally find a key parameter used to monitor the operation safety of a steam injection boiler. The calculation results show that the thermal conductivity of water scale has almost no effect on the pressure drop and that the flow rate has a small effect on the wall temperature. The pressure drop is increased with increase of the scale thickness and flow rate and with decrease of the feed water pressure. While the wall temperature increases when the water scale thickness and feed water pressure increase, the thermal conductivity of water scale decreases. The maximal allowable pressure drop as a key parameter used to guide the boiler cleaning is obtained in this paper. It is not constant but depends on the thermal conductivity of water scale, the feed water pressure, and the flow rate. Once the pressure drop reaches the allowable value, the water scale must be removed by chemical cleaning to ensure the safe operation of a steam injection boiler.


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