·940 北京科技大学学报 第35卷 个辐射管换热器改造后由于压损增加每年将会多消 36(2):53 耗353kg标准煤.改造前后的换热器使烟气热量损 (李同杰。高温空气燃烧技术在蓄热式燃气辐射管中的应 失降低14.07kW(见表2中1#和5#),辐射管以 用.有色金属加工,2007,36(2):53) 70%的热负荷计算则每年可节约燃料10801kg标准 [5 Nasiruddin,Siddiqui M H K.Heat transfer augmentation 煤.因此对于整个辐射管而言,换热器改造后每根 in a heat exchanger tube using a baffle.Int J Heat Fluid 辐射管每年可节约燃料10.45t标准煤. Flo,2007,28(2):318 [6]Zhang J F,He Y L,Tao W Q.3D numerical simulation 4结论 on shell-and-tube heat exchangers with middle-overlapped (1)把现有W型辐射管换热器中心空气管径由 helical baffles and continuous baffles.Part I.Numerical model and results of whole heat exchanger with middle- 一根φ79mm粗管改为六根Φ33mm细管,增加了 overlapped helical baffles.Int J Heat Mass Transfer,2009, 换热面积,有效提高了换热量. 52(23/24):5371 (2)增设烟气第二行程后,烟气流动距离加倍, [7]Tu W G,Liu YY,Feng J X,et al.Summary of radiant 并实现了空气套管的双侧受热,明显增强了换热 tube heating Technology.Ind Furnace,2007,29(3):15 效率。 (涂卫国,刘赞赞,冯俊小,等.辐射管加热技术综述.工业 (3)密封折流板与多孔折流板的强化换热效果 炉,2007,29(3):15) 相当,密封折流板结构的热阻变化幅度较大,多孔 [8]Huang W J,Zhang J F,Tao W Q.The effect of baffle 折流板结构的热阻波动幅度较小,能够有效消除换 parameters on the performance of segmental-baffle heat 热死区,同时大幅度降低压损. exchangers.J Eng Thermophys,2007,28(6):1022 (黄文江,张剑飞,陶文铨.弓形折流板换热器中折流板对 换热器性能的影响.工程热物理学报,2007,28(6):1022) 参考文献 [9]Yu J Y,Wang Z W,Feng X K.Experimental research on a [1]Yuan T,Tao QY,Yao X F.Summary on equipment tech- single segmental baffle drilling.Petro-Chem Equip,2004, 33(2):3 nology of heat treatment for medium and heavy plate Heat Treat Technol Equip,2009,30(2):59 (喻九阳,王泽武,冯兴奎.单弓形折流板开孔试验研究.石 (袁涛,陶齐印,姚雪飞.中厚板热处理装备技术概况.热处 油化工设备,2004,33(2):3) 理技术与装备,2009,30(2):59) [10]Qian C F,Gao H Y,Sun H Y.Shell-side fluid flow and [2]Marino J A,Zhang Y.New burner technology for indirect heat transfer in curved baffle heat exchanger.CIESC J, firing continuous annealing furnaces.Ind Furnace,2005, 2011,62(5):33 27(6):19 (钱才富,高宏宇,孙海阳.曲面弓形折流板换热器壳程流 (Marino J A,张弈.间接加热新技术在连续退火炉上的应 体流动与传热.化工学报,2011,62(5):33) 用.工业炉,2005,27(6):19) [11]Chen G D,Chen Q Y,Zeng M,et al.Numerical studies [3]Rafidi N,Blasiak W,Jewartowski M,et al.Increase of on combined multiple shell-pass shell-and-tube heat ex- the effective energy from the radiant tube equipped with changer with helical baffles.J Eng Thermophys,2009, regenerative system in comparison with conventional re- 30(8):1357 cuperative system.IFRF Combust J,2005(3):1 (陈贵冬,陈秋炀,曾敏,等.组合式多壳程螺旋折流板管 [4]Li T J.Application of high temperature air combustion 壳式换热器数值模拟研究.工程热物理学报,2009,30(8): to regenerative gas tube.Nonferrous Met Process,2007, 1357)· 940 · 北 京 科 技 大 学 学 报 第 35 卷 个辐射管换热器改造后由于压损增加每年将会多消 耗 353 kg 标准煤. 改造前后的换热器使烟气热量损 失降低 14.07 kW (见表 2 中 1#和 5#),辐射管以 70%的热负荷计算则每年可节约燃料 10801 kg 标准 煤. 因此对于整个辐射管而言,换热器改造后每根 辐射管每年可节约燃料 10.45 t 标准煤. 4 结论 (1) 把现有 W 型辐射管换热器中心空气管径由 一根 φ79 mm 粗管改为六根 φ33 mm 细管,增加了 换热面积,有效提高了换热量. (2) 增设烟气第二行程后,烟气流动距离加倍, 并实现了空气套管的双侧受热,明显增强了换热 效率. (3) 密封折流板与多孔折流板的强化换热效果 相当,密封折流板结构的热阻变化幅度较大,多孔 折流板结构的热阻波动幅度较小,能够有效消除换 热死区,同时大幅度降低压损. 参 考 文 献 [1] Yuan T, Tao Q Y, Yao X F. Summary on equipment technology of heat treatment for medium and heavy plate. Heat Treat Technol Equip, 2009, 30(2):59 (袁涛, 陶齐印, 姚雪飞. 中厚板热处理装备技术概况. 热处 理技术与装备, 2009, 30(2): 59) [2] Marino J A, Zhang Y. New burner technology for indirect firing continuous annealing furnaces. Ind Furnace, 2005, 27(6): 19 (Marino J A, 张弈. 间接加热新技术在连续退火炉上的应 用. 工业炉, 2005, 27(6): 19) [3] Rafidi N, Blasiak W, Jewartowski M, et al. Increase of the effective energy from the radiant tube equipped with regenerative system in comparison with conventional recuperative system. IFRF Combust J, 2005(3): 1 [4] Li T J. Application of high temperature air combustion to regenerative gas tube. Nonferrous Met Process, 2007, 36(2):53 (李同杰. 高温空气燃烧技术在蓄热式燃气辐射管中的应 用. 有色金属加工, 2007, 36(2): 53) [5] Nasiruddin, Siddiqui M H K. Heat transfer augmentation in a heat exchanger tube using a baffle. Int J Heat Fluid Flow, 2007, 28(2): 318 [6] Zhang J F, He Y L, Tao W Q. 3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles. Part I. Numerical model and results of whole heat exchanger with middleoverlapped helical baffles. Int J Heat Mass Transfer, 2009, 52(23/24): 5371 [7] Tu W G , Liu Y Y, Feng J X, et al. Summary of radiant tube heating Technology. Ind Furnace, 2007, 29(3): 15 (涂卫国, 刘赟赟, 冯俊小, 等. 辐射管加热技术综述. 工业 炉, 2007, 29(3): 15) [8] Huang W J, Zhang J F, Tao W Q. The effect of baffle parameters on the performance of segmental-baffle heat exchangers. J Eng Thermophys, 2007, 28(6): 1022 (黄文江, 张剑飞, 陶文铨. 弓形折流板换热器中折流板对 换热器性能的影响. 工程热物理学报, 2007, 28(6): 1022) [9] Yu J Y, Wang Z W, Feng X K. Experimental research on a single segmental baffle drilling. Petro-Chem Equip, 2004, 33(2): 3 (喻九阳, 王泽武, 冯兴奎. 单弓形折流板开孔试验研究. 石 油化工设备, 2004, 33(2): 3) [10] Qian C F, Gao H Y, Sun H Y. Shell-side fluid flow and heat transfer in curved baffle heat exchanger. CIESC J, 2011, 62(5): 33 (钱才富, 高宏宇, 孙海阳. 曲面弓形折流板换热器壳程流 体流动与传热. 化工学报, 2011, 62(5): 33) [11] Chen G D, Chen Q Y, Zeng M, et al. Numerical studies on combined multiple shell-pass shell-and-tube heat exchanger with helical baffles. J Eng Thermophys, 2009, 30(8): 1357 (陈贵冬, 陈秋炀, 曾敏, 等. 组合式多壳程螺旋折流板管 壳式换热器数值模拟研究. 工程热物理学报, 2009, 30(8): 1357)