双膛竖窑教材20140624

湛江钢铁ZhanjiangSteelProjectCommandHeadquarter炼钢项目组石灰单元2014年6月石灰双膛竖窑工艺设备湛江钢铁ZhanjiangSteelProjectCommandHeadquarter目录双膛窑工艺概述1双膛窑工艺参数计算2双膛窑设备组成33总结44湛江钢铁ZhanjiangSteelProjectCommandHeadquarter窑膛数量:２个窑生产能力:600吨/日喷枪数量:每窑膛33个，共66个单位产品热耗:3540kJ/kg石灰石灰石粒度:40～80mm燃料种类:混合煤气燃料低发热值:～10450kJ/Nm3燃料用量:0.69×108Nm3/a(平均量)年工作日:340d年生产能力:20.4万t1.1规格及主要技术参数湛江钢铁ZhanjiangSteelProjectCommandHeadquarter双膛窑拥有最长的并流带，石灰活性度高，活性度≥350ml；两个窑膛交替操作，热能得到充分的利用，单位热耗在所有石灰窑型中最低，热效率超过85%，热耗低于850kCal/kg石灰；废气中粉尘和温度都较低，废气中含尘浓度一般为5～8g/m3，废气温度正常情况下为70～130ºC，易于废气净化处理，减轻环境污染；耐火材料设计异形砖少，砌筑简单，大修费用低；产量调节范围广，可以在50%～105%之间自动调节控制；1.2双膛窑的技术特点湛江钢铁ZhanjiangSteelProjectCommandHeadquarter双膛竖窑是由两个窑膛组成，在窑膛煅烧带的下端以环形通道相连。埋设于预热带石灰石中的燃料喷枪向燃烧带供热。助燃空气从窑的顶部送入。窑膛1中的石灰石以并流方式加热煅烧；产生的烟气与分解的气体经连接通道经窑膛2的冷却带、预热带后流向窑顶，与膛2内石灰石进行热交换，使其加热到分解温度，然后排出。换向操作时，助燃空气流经窑膛2的预热带进行热交换。1.3双膛竖窑煅烧工艺工艺简介湛江钢铁ZhanjiangSteelProjectCommandHeadquarter预热带，6.5m煅烧带，8.1m冷却带，6.78m流程图湛江钢铁ZhanjiangSteelProjectCommandHeadquarter石灰石料位的移动运行制度黑色长方体表示燃烧状态，时间间隔为t1，白色长方体表示蓄热状态，时间间隔t1。t2为换向时间。换向期间向刚刚结束燃烧的窑身装料（从L料位装到H1料位）。即当窑身B开始燃烧时窑身A料位为H1，窑身B为H2，随T1的进行窑身A料位降到H2，窑身B的料位降到L，然后进行换向。换向期间窑身B料位由L加到H1。1.4燃烧控制湛江钢铁ZhanjiangSteelProjectCommandHeadquarter湛江钢铁ZhanjiangSteelProjectCommandHeadquarter生产量设定：600T/D单位热耗设定:烧混合煤气：845Kcal/Kg.cao烧转炉煤气：870Kcal/Kg.cao运行方式：自动成品冷却风：0.7m3/Kg.cao悬挂缸冷却风：5800m3/Hr原料装入量设定：4000-5000kg/次.个膛1.5双膛窑操作参数设定湛江钢铁ZhanjiangSteelProjectCommandHeadquarter炉号（1）2011年3月7日时间设定日产量t石灰石量过剩空气系数冷却空气系数单位燃耗助燃风机转速冷却风机转速风机房压力kpa风机房温度℃燃烧时间秒液压油温度℃压力kpa温度（℃）煤气加压机燃烧空气悬挂钢冷却空气喷枪冷却空气冷却空气窑堂通道悬挂钢石灰废气煤气压力kpa煤气流量煤气发热值开度（％）窑堂1光学仪窑堂2窑堂1窑堂2窑堂1窑堂2中心冷却窑堂1窑堂2除尘器入口12312345678窑堂1窑堂255098501.080.653661405815278423638.242.143.630.128.6828962819163158170208172160209191223201578613514713048.1690065.268.255098501.080.653661411818278423639.343.245.330.629.8828972809162157180206178177205190195191658013515013659.2710061.665.655098501.080.653661412818278423639.843.744.831.929.2828962814161157168207185173206182209186668213114413749.3690060.662.655098501.080.6536614098182784236394344.43129.3822970813162155167205187164213180207189578912413711849.3690063.666.855098501.080.653661409818278423639.243.244.63128.9826970816162154167239211196224194202197618412413711749.5670069.767.855098501.080.653661409818278423639.243.543.83029.2828968813160154170227227188255211221209608013114413549.4680066.869.855098501.10.653661430817278423636.240.541.130.128.1833970821160154200245234209256227226208598513815812046.7670062.36555098501.10.653661440804278423637.142.443.531.729.5835957823159154225264244222252235233218608813245011245.1670062.16555098501.10.653661450810278423538.442.344.23028.3837958823160156228247236233255240232236607814314512649.3650068.367.255098501.10.653661433796278423535.939.940.527.525.9832975823162153248235237229260268245242586314215912447.6650066.272.955098501.10.673661441800268423538.242.244.229.527.8829976826158153222217218199252249237246565714915514248.5660066.169.955098501.10.673661457麦尔兹窑主控操作记录825278423539.743.344.630.929.1827970820163157187218217205268237243225575715015815150.1640071.671.755098501.10.673661443805278423535.839.940.93126828925816164158184216196189253230247206545415215912342.6660068.771.355098501.10.673661475819288423539.94445.531.128828963816166161183194183165255230221200545515016615251640072.273.255098501.10.673661483825298423539.943.845.330.829.1821972815167162166187165150243228217206536615016114651.4630072.875.845080501.10.673661855472298423626.731.142.320.619.4832912819166160180203165142257235211198555814816214331.8610060.262.145080501.10.673661869676288423626.234.438.822.821.8842941832165160182196192167257245226217546013517213241.6560066.769.5KG/周期m/kgkj/kgrpmrpmkj/m0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:0033100.9100.8101.8101.9101.9101.1101.1101.1101.1101.2101.2101.2101101.1100.8100.7100.5m/h15989162031602416015164331647316619164891690416863163101669016501168321702011136158403湛江钢铁ZhanjiangSteelProjectCommandHeadquarterCaCO3CaO＋CO2↑－422Kcal/KG1005644X0.01544X＝100X0.015X=1.5/44=0.034理论烧成率：56/100=0.56考虑到参与CO2以CaCO3方式留在成品中，所以理论烧成率：B=0.56+0.034=0.594也就是说1T原石可以烧成1000KG×0.594=594KG的CaO。2.1石灰焙烧的物料平衡湛江钢铁ZhanjiangSteelProjectCommandHeadquarter双膛窑是一种工艺制度切换烧成的并流、蓄热的形式进行生产，炉膛切换时间的设定如下：a.每一个循环中投入原石量：10000Kgb.日生产石灰量：600×103Kg/Dc.烧成率：0.5942.21每天切换次数天次/01.101594.0101010600332.2烧成工艺制度湛江钢铁ZhanjiangSteelProjectCommandHeadquarter2.22每个循环时间注：14.256分包括切换时间约1分钟（切换时加料，约35S），切换时间可以在设备调试中基本确定。出去1分钟切换时间，实际一个炉膛焙烧时间约13.256分钟。2.23每次循环燃料消耗a.混合煤气发热值：2500Kcal/Nm3b.成品热单耗：845Kcal/Kg·CaOc.混合煤气场合=次分天次分/256.14/01.1016024HrmK35.9087256.13250060845g5940分湛江钢铁ZhanjiangSteelProjectCommandHeadquarter双膛窑采用燃料是混合煤气，由COG（焦炉煤气）和LDG（转炉煤气）按比例混合成2500Kcal/Nm3热值的煤气。2.31热值计算转炉煤气干煤气成分（%）COCO2H2N2CH4C2H2O2合计58.515.13.721.51.00.10.1100焦炉煤气干煤气成分（%）COCO2H2N2CH4C2H4C2H6C3H6O2合计5.92.158.83.825.62.30.90.20.41002.3理论风量湛江钢铁ZhanjiangSteelProjectCommandHeadquarter转炉煤气热值计算（QLKcal/Nm3）QL=3020×58.5%+2580×3.7%+8561×1%+13397×0.1%=1766.7+95.46+85.61+13.397=1961Kcal/Nm3焦炉煤气热值计算（QcKcal/Nm3）Qc=3020×5.9%+2580×58.8%+8561×