Steam hydration of CFBC bottom ashes in a rotary kiln

被引：4

作者：

Cheng, Chung-Yu ^{[1
]}

Yang, Yi-Ning ^{[1
]}

Huang, An-Ni ^{[1
]}

Kuo, Hsiu-Po ^{[1
,2
]}

机构：

[1] Chang Gung Univ, Dept Chem & Mat Engn, Tao Yuan 333, Taiwan

[2] Chang Gung Univ, Green Technol Res Ctr, Tao Yuan 333, Taiwan

来源：

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS | 2013年 / 44卷 / 06期

关键词：

Bottom ash; Steam hydration; Rotary kiln; Sorbent reactivation; Desulfation; FLUIDIZED-BED COMBUSTION; SO2; CAPTURE; REACTIVATION; SULFATION; LIMESTONE; SORBENT; SEGREGATION; FBC;

D O I：

10.1016/j.jtice.2013.05.025

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Circulating fluidized bed combustion boiler bottom ashes (BA) are hydrated in a 15 rpm rotary kiln using 200 C steam. After different hydration time, BA particles are characterized by the particle size distribution, the BET specific surface area, the pore size distribution and the thermogravimetry analysis. Calcium oxide in the BA core reacts with steam and produces calcium hydroxide. The molar volume expansion of this reaction breaks the calcium sulfate shell, causing the reduction of the particle size, the increasing of the specific surface area and the total pore volume. The reaction conversion increases with the increasing of the steam hydration time and reaches ca. 90% after 5 min hydration time. The pore size distribution of BA after the hydration reaction affects its desulfation reactivity. After 5 mm steam treatment, the hydrated BA shows the greatest desulfation reactivity, which is comparable to that of the fresh limestone particles. (C) 2013 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：1060 / 1066

页数：7

共 21 条

[1] Reactivation of limestone sorbents in FBC for SO2 capture [J].

Anthony, E. J. ;

Bulewicz, E. M. ;

Jia, L. .

PROGRESS IN ENERGY AND COMBUSTION SCIENCE, 2007, 33 (02) :171-210

[2] CFBC ash hydration studies [J].

Anthony, EJ ;

Jia, LF ;

Wu, YH .

FUEL, 2005, 84 (11) :1393-1397

[3] Sulfation phenomena in fluidized bed combustion systems [J].

Anthony, EJ ;

Granatstein, DL .

PROGRESS IN ENERGY AND COMBUSTION SCIENCE, 2001, 27 (02) :215-236

[4] Advanced fluidized bed combustion sorbent reactivation technology [J].

Anthony, EJ ;

MacKenzie, A ;

Trass, O ;

Gandolfi, E ;

Iribarne, AP ;

Iribarne, JV ;

Burwell, SM .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2003, 42 (06) :1162-1173

[5] An examination of the exothermic nature of fluidized bed combustion (FBC) residues [J].

Anthony, EJ ;

Jia, L ;

Caris, M ;

Preto, F ;

Burwell, S .

WASTE MANAGEMENT, 1999, 19 (04) :293-305

[6] The enhancement of hydration of fluidized bed combustion ash by sonication [J].

Anthony, EJ ;

Jla, L ;

Cyr, L ;

Smith, B ;

Burwell, S .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (20) :4447-4453

[7] Simulation study of droplet vaporization effects on gas-solid fluidized bed [J].

Behjat, Yaghoub ;

Shahhosseini, Shahrokh ;

Marvast, Mahdi Ahmadi .

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS, 2011, 42 (03) :419-427

[8]

Blondin J, 1993, P INT C FLUID BED CO

[9] REACTIVATION OF PARTIALLY-SULFATED LIMESTONE PARTICLES FROM A CFB COMBUSTOR BY HYDRATION [J].

COUTURIER, MF ;

MARQUIS, DL ;

STEWARD, FR ;

VOLMERANGE, Y .

CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1994, 72 (01) :91-97

[10] An industrial comparative study of cement clinker grinding systems regarding the specific energy consumption and cement properties [J].

Hosten, Cetin ;

Fidan, Berkan .

POWDER TECHNOLOGY, 2012, 221 :183-188

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