连续退火炉余热回收技术应用与节能方案

nullnull/null 2009 M2 连续退火炉余热回收技术应用与节能方案王null 鲁,王家真(宝钢新日铁汽车板有限公司,上海null 200941)null nullK1:冷轧带钢连续退火炉机组排烟温度高a耗能大是普遍存在的问题b为了提供一些退火炉节能降耗技术方面的参考方案, 以宝钢四冷轧为分析对象,对冷轧带钢连续退火炉的几种余热回收方式进行了比较,并讨论了各种余热回收形式的优缺点,认为null过热水回收技术null是比较便捷的余热回收方式,并通过分析一个热平衡测试实例, 找出余热回收以外的几种在退火炉本体可以实施的节能方法bnull null1oM:连续退火炉; 余热回收; 节能技术ms |: TG155. 1nullDS : BnullcI|: 1008- 0716( 2009) 02- 0070- 05Application of Residual H eat R ecovery Technology of theContinuous Annealing Furnace and the Energynullsaving Schem esWANG Lu and WANG Jiazhen( BaosteelnullN SC /A celor Automotive Steel Sheets C o. , Ltd. , Shanghai 200941, China)null null Abstract: It is a comm on problem that the tem perature of flue gases from cold strip annealingfurnaces is high and the energy consumption is grea.t In order to provide som e schem es for referencein energy saving and consum ption reducing for annealing furnaces, BaosteelN o. 4 cold m ill plan tw as taken as an analytical object and the existing residual heat recovery m ethods for cold strip annullnealing furnacesw ere com pared. A fter strong and w eak points of each m ethod had been d iscussed,the null over hot w ater recovery techniquenull w as considered them ost conven ient of al.l Through analynullzing a heat balance sam p le, som e other energynullsaving m ethods that cou ld be im plem ented in anneanullling furnaces w ere d iscovered.K ey w ords: continuous annealing furnace; residual heat recovery; energynullsaving technology0null -“E# “d,“d !9 1. 2 MPa, f /, , -90null , 140null ,5 1 ,yNV ? ,7 A i5 =b YV ,F b b! !# 2 b l ?ZE Q VM, ! e,g9l, MBtbV “d B“d, T P, b7 Q V 3 L= 1hB ,yNV “d1 Q V1zb l Te1 nV3b图 3null 过热水余热回收系统F ig. 3null Residual heat recovery system of over hot w ater72王null 鲁等null | V l/ ?ZV3null l Te1 Tab le 3null Com parison of three types ofresidual heat recovery system s1 “ Q VV g KK!1 e lrTBKz z l ? BKz zV l1 A, Q VrTKz,gv,bV “d Bgla lr qKD4b3null | V ?Z) l !, V lBs ?, , l ? 8K,BKvl q ?r13% 14%,yNA H I n| V8 L ?/ b1 | VF L ?n ,K1 15| V k,9 ,YV k,s ? ,i 1 v | ?n bV4 F kTbV4null F kTTable 4null The test results of heat balance on a CGL line % /(M Jnull t- 1 ) l F V : 8 CQnull720 809 6. 0 51. 9 11. 5 0. 9 3. 4 26. 3 13. 4DQnull760 891 6. 1 51. 3 11. 3 0. 9 3. 3 27. 2 20. 5DDQnull780 931 6. 1 51. 0 11. 5 0. 9 3. 4 27. 2 13. 8DDQnullOUTnull780 926 5. 9 51. 4 12. 7 1. 0 3. 8 25. 1 14. 0EDDQnull780 966 6. 1 50. 5 11. 6 0. 9 3. 4 27. 4 14. 1EDDQnullOUTnull780 965 6. 0 50. 9 12. 4 1. 0 3. 7 25. 9 14. 3SEDDQnull840 1 038 6. 2 49. 6 11. 6 0. 9 3. 4 28. 3 14. 3SEDDQnullOUTnull840 1 038 6. 2 50. 0 12. 0 1. 0 3. 6 27. 3 14. 5H SSnullCQnull750 867 6. 0 51. 6 10. 8 0. 9 3. 2 27. 4 13. 8HSSnullDQnull800 961 6. 2 50. 7 11. 0 0. 9 3. 3 28. 0 14. 3H SSnullDDQnull800 965 6. 1 50. 7 11. 2 0. 9 3. 3 27. 8 14. 3H SSnullDDQnullOUTnull800 977 6. 0 50. 8 12. 6 1. 0 3. 7 25. 8 14. 3HSSnullBHnull850 1 055 6. 2 49. 6 11. 8 0. 9 3. 5 27. 9 14. 8H SSnullBHnullOUTnull850 1 057 6. 2 49. 6 12. 4 1. 0 3. 7 27. 2 14. 9 M ( FT ) 946 6. 2 49. 6 12. 7 1. 0 3. 8 26. 7 13. 6null nullV V b# A b( 26. 7% ) V : ( 12. 7% ) v, l“d l 13. 6%b3. 1null4 b null “ - ?/ 1 T / b T / Vvv4 b ,V7 , 30%bB/ A | VS ,F !,g ,S !#p91 ,yN, ( 12. 7% )91 v,.d# V : ! m6b图 6null 传统及新型的炉墙保温棉铺设结构Fig. 6null Norm al and new types ofcotton structures forw all insulation.d V : m6( a) U, %|# % V T 2b“ V = “ %. V T,B| V % ,/ V : vb V : m6( b) U,(L8 vS , %|(L8 v% V T b“, %V = r(,vvh ./ V T bN, (L8 v, 0 h b h V 01 200null ,.dM1 MaZLb V : V T1nm7b“ V =800null f /,.d V : ( b), V T70 80null ,7 V : ( a) H, V T40 50nullb图 7null 两种炉墙保温结构炉壳温度F ig. 7null Tem perature of furnace shell w ithtw o kinds of w all insulation structures4null “ g A p v,|y !