Removal of gas-side particulate fouling layers by foreign particles as a function of flow direction

被引：21

作者：

Abd-Elhady, M. S. ^{[1
]}

Abd-Elhady, S. ^{[2
]}

Rindt, C. C. M. ^{[3
]}

Steenhoven, A. A. V. ^{[3
]}

机构：

[1] Beni Suief Univ, Dept Mech Engn, Beni Suief, Egypt

[2] S Valley Univ, Dept Mech Engn, Aswan, Egypt

[3] Eindhoven Univ Technol, Dept Mech Engn, NL-5600 MB Eindhoven, Netherlands

来源：

APPLIED THERMAL ENGINEERING | 2009年 / 29卷 / 11-12期

关键词：

Particulate fouling; Heat exchangers; Deposition; Non-heating fouling; CROSS-FLOW; CIRCULAR-CYLINDER; HEAT-EXCHANGERS; DEPOSITION; FRICTION; VELOCITY; SURFACE; NUMBER;

D O I：

10.1016/j.applthermaleng.2008.11.020

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Removal of particulate fouling layers by externally injected particles as a function of flow direction with respect to gravity is investigated experimentally. Three orientations of flow have been investigated, horizontal flow, upward flow and a downward flow. It is found that fouling starts at the point of stagnation irrespective of the flow direction, and also starts at the top point of the heat exchanger tubes. Particulate fouling grows from these two points except for the downward flow, were the flow stagnation point coincides with the top point of the heat exchanger tubes and the growth of the fouling layer starts only from one point. It was not possible to remove the fouling layer in case of a horizontal and an upward flow by the externally injected particles, however in case of a downward flow most of the fouling layers were removed by the external particles. It can be concluded that the downward flow is the best flow orientation to linger particulate fouling and for removal of fouling layers by externally injected particles. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2335 / 2343

页数：9

共 43 条

[1] Modelling the impaction of a micron particle with a powdery layer [J].

Abd-Elhady, M. S. ;

Rindt, C. C. M. ;

Wijers, J. G. ;

van Steenhoven, A. A. .

POWDER TECHNOLOGY, 2006, 168 (03) :111-124

[2] Influence of sintering on the growth rate of particulate fouling layers [J].

Abd-Elhady, M. S. ;

Clevers, S. H. ;

Adriaans, T. N. G. ;

Rindt, C. C. M. ;

Wijers, J. G. ;

van Steenhoven, A. A. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2007, 50 (1-2) :196-207

[3] Particulate fouling in waste incinerators as influenced by the critical sticking velocity and layer porosity [J].

Abd-Elhady, MS ;

Rindt, CCM ;

Wijers, JG ;

van Steenhoven, AA .

ENERGY, 2005, 30 (08) :1469-1479

[4] Minimum gas speed in heat exchangers to avoid particulate fouling [J].

Abd-Elhady, MS ;

Rindt, CCM ;

Wijers, JG ;

van Steenhoven, AA ;

Bramer, EA ;

van der Meer, TH .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2004, 47 (17-18) :3943-3955

[5] Writing the rules of global finance: France, Europe, and capital liberalization [J].

Abdelal, R .

REVIEW OF INTERNATIONAL POLITICAL ECONOMY, 2006, 13 (01) :1-27

[6]

ABEL ATM, 2005, THERM SCI, V9, P85

[7] DISTRIBUTION OF LOCAL PRESSURE AND SKIN FRICTION AROUND A CIRCULAR CYLINDER IN CROSS-FLOW UP TO RE=5X106 [J].

ACHENBAC.E .

JOURNAL OF FLUID MECHANICS, 1968, 34 :625-&

[8] ASH DEPOSITION DURING BIOMASS AND COAL COMBUSTION - A MECHANISTIC APPROACH [J].

BAXTER, LL .

BIOMASS & BIOENERGY, 1993, 4 (02) :85-102

[9]

BENSON SA, 1993, FUNDAMENTAL COAL COM, V4, P299

[10]

Bohnet M., 1987, CHEM ENG TECHNOL, V10, P113, DOI DOI 10.1002/CEAT.270100115

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