석탄 유동층 연소로 내 수벽전열관의 열전달 특성

박영성; 손재익

HWAHAK KONGHAK, Vol.31, No.3, 287-294, June, 1993

Export Citation

석탄 유동층 연소로 내 수벽전열관의 열전달 특성

Heat Transfer Characteristics of Membrane Water Wall in a Fluidized Bed Coal Combustor

박영성, 손재익

초록

파이롯트 규모의 유동층 연소로에서 수벽전열관（membrane water wall）의 열전달 특성을 고찰하였다. 조업변수로서 유동화속도(2.2-3.2 m/s), 유동층온도(800-960℃)등이 적용되었으며, 주요 열전달 특성으로서 경막 전열계수(individual heat transfer coefficient), 열전달율(heat flux)이 측정 및 고찰되었다. 실험결과 유동층영역 내 수벽전열관의 열전달계수는 유동층온도에 비례하고 유동화속도에 따라 최대값과 함께 증감현상을 보였으며 일반 수평, 수직전열관에 비해 다소 낮은 값을 보였다. Freeboard영역 내 수벽전열관의 열전달계수는 유동층내 전열관의 30-40%에 해당되는 낮은 값을 가지며, 유동화속도 및 유동층온도가 증가할수록 증가하였다.

Heat transfer characteristics of membrane water wall have been determined in a pilot-scale fluidized bed coal combustor. The effects of fluidizing velocity（2.2-3.2 m/s） and bed temperature(800-960℃) on individual heat transfer coefficient and heat flux have been determined. The heat transfer coefficients of the in-bed membrane water wall increase with bed temperature, while it exhibits a maximum value with fluidizing gas velocity. Also, the heat transfer coefficients of membrane water wall were slightly lower than those of typical horizontal and vertical tube located in a fluidized bed. The heat transfer coefficients of free-board membrane water wall appeared to be 30-40% of those of in-bed membrane water wall and they increase with fluidizing velocity and bed temperature.

[References]

Well JM, Byrd JR, Krishnan RP, Proc. of the 7th Int. Conf. on FBC, 2, 1107 (1982)
Rajan RR, Wen CY, AIChE J., 26, 642 (1980)
Choi JH, Son JE, Kim SD, HWAHAK KONGHAK, 26(5), 494 (1988)
Park YS, Son JE, HWAHAK KONGHAK, 28(3), 320 (1990)
Kim SD, HWAHAK KONGHAK, 17(2), 85 (1979)
Saxena SC, Grewal NS, Gador JD, "Advances in Heat Transfer," Vol. 14, 149 (1979)
Kunii D, Levenspiel O, "Fluidization Engineering," Chapter 13, 2nd ed., John Wiley & Sons, New York, 313 (1991)
Botterill JSM, "Fluidized-Bed Heater," Academic Press, New York (1975)
George SE, Grace JR, AIChE J., 28, 759 (1982)
Hashimoto O, Mori S, Hiraoka S, Kojima T, Tsuji K, Int. Chem. Eng., 30, 254 (1990)
Biyikli S, Tualz Z, Chen JC, Powder Technol., 53, 187 (1987)
Farag IH, Tsai KY, Proc. of the 11th Int. Conf. on FBC, Vol.3, 1207 (1991)
Carson WR, Proc. of the 8th Int. Conf. on FBC, Vol. 1, 208 (1985)
Wu RL, Lim CJ, Chaouki J, Grace JR, AIChE J., 33, 1888 (1987)
Lee CK, Choi JH, Son JE, Energy R&D, 8(4), 16 (1986)
Gelperin NI, Einstein VG, "Fluidization," ed. by Davidson J.F. and Harrison, D., Academic Press, London, 471 (1970)
Zhang HC, Cen KF, Xie CL, Huang GQ, Proc. of the 7th Int. Conf. on FBC, Vol. 1, 819 (1982)
Choi JC, Kim YJ, Moon SH, Kim SD, HWAHAK KONGHAK, 23(3), 153 (1985)
Meulink JP, Haasteren AWMBV, Temmink HMG, Proc. of the 8th Int. Conf. on FBC, Vol. 1, 179 (1985)
Tuzla K, Biyikli S, Chen JC, Proc. of the 8th Int. Conf. on FBC, Vol. 1, 159 (1985)
Grewal NS, Zobeck BJ, Mann MD, Hajicek DR, Proc. of the 1987 Int. Conf. on FBC, Vol. 2, 1153 (1987)
Bak YC, Son JE, Kim SD, HWAHAK KONGHAK, 23(4), 213 (1985)
Basu P, AIChE Symp. Ser., 74, 187 (1978)
Vreedenburg HA, J. Appl. Chem., S26, 526 (1952)
Kharchenko NY, Makhorin KE, Int. Chem. Eng., 4, 650 (1964)
Gormar H, Renz U, Verweyen N, Proc. of the 10th Int. Conf. on FBC, vol. 2, 1241 (1989)

[Referenced By]

[1] Well JM, Byrd JR, Krishnan RP, Proc. of the 7th Int. Conf. on FBC, 2, 1107 (1982)

[2] Rajan RR, Wen CY, AIChE J., 26, 642 (1980)

[3] Choi JH, Son JE, Kim SD, HWAHAK KONGHAK, 26(5), 494 (1988)

[4] Park YS, Son JE, HWAHAK KONGHAK, 28(3), 320 (1990)

[5] Kim SD, HWAHAK KONGHAK, 17(2), 85 (1979)

[6] Saxena SC, Grewal NS, Gador JD, "Advances in Heat Transfer," Vol. 14, 149 (1979)

[7] Kunii D, Levenspiel O, "Fluidization Engineering," Chapter 13, 2nd ed., John Wiley & Sons, New York, 313 (1991)

[8] Botterill JSM, "Fluidized-Bed Heater," Academic Press, New York (1975)

[9] George SE, Grace JR, AIChE J., 28, 759 (1982)

[10] Hashimoto O, Mori S, Hiraoka S, Kojima T, Tsuji K, Int. Chem. Eng., 30, 254 (1990)

[11] Biyikli S, Tualz Z, Chen JC, Powder Technol., 53, 187 (1987)

[12] Farag IH, Tsai KY, Proc. of the 11th Int. Conf. on FBC, Vol.3, 1207 (1991)

[13] Carson WR, Proc. of the 8th Int. Conf. on FBC, Vol. 1, 208 (1985)

[14] Wu RL, Lim CJ, Chaouki J, Grace JR, AIChE J., 33, 1888 (1987)

[15] Lee CK, Choi JH, Son JE, Energy R&D, 8(4), 16 (1986)

[16] Gelperin NI, Einstein VG, "Fluidization," ed. by Davidson J.F. and Harrison, D., Academic Press, London, 471 (1970)

[17] Zhang HC, Cen KF, Xie CL, Huang GQ, Proc. of the 7th Int. Conf. on FBC, Vol. 1, 819 (1982)

[18] Choi JC, Kim YJ, Moon SH, Kim SD, HWAHAK KONGHAK, 23(3), 153 (1985)

[19] Meulink JP, Haasteren AWMBV, Temmink HMG, Proc. of the 8th Int. Conf. on FBC, Vol. 1, 179 (1985)

[20] Tuzla K, Biyikli S, Chen JC, Proc. of the 8th Int. Conf. on FBC, Vol. 1, 159 (1985)

[21] Grewal NS, Zobeck BJ, Mann MD, Hajicek DR, Proc. of the 1987 Int. Conf. on FBC, Vol. 2, 1153 (1987)

[22] Bak YC, Son JE, Kim SD, HWAHAK KONGHAK, 23(4), 213 (1985)

[23] Basu P, AIChE Symp. Ser., 74, 187 (1978)

[24] Vreedenburg HA, J. Appl. Chem., S26, 526 (1952)

[25] Kharchenko NY, Makhorin KE, Int. Chem. Eng., 4, 650 (1964)

[26] Gormar H, Renz U, Verweyen N, Proc. of the 10th Int. Conf. on FBC, vol. 2, 1241 (1989)