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干冰清洗在提高聚酯热煤炉热效率中的应用……
- 2019-01-26-

前言 
中国石化仪征化纤股份公司自80年代初引进8条聚酯生产线(年生产能力6万t/线)分布于涤纶一、二、三厂,同时引进辅助生产装置立式热媒炉9台(每厂3台)。投产至今,运行状况一直良好。但是,随着运行时间的延长。热媒炉的热效率下降,已由运行初期的85%(设计值85%)降到目前的76%~80%。相对于后期引进的卧式热媒炉(热效率高达90%以上),热效率明显太低,原油消耗偏高。通过理论分析,结台生产实际,对热媒炉热效率影响因素进行优化,最终实现降低油耗,减少生产成本,提高企业竞争力,具有重要意义。本文通过选定的关键影响因素烟道气温度偏高作为研究对象,用干冰清洗体育外围新技术去除炉内结碳污垢,达到降低烟气温度,提高热媒炉热效率的目的。

体育外围1 REMEILUREXIAOLVYINGXIANGYINSUFENXI

GENJUYANGZHOUSHIJIENENGJIANCEZHANDUIWOCHANGDE3TAIREMEILUCESHIJIEGUOKEYIKANCHU:REMEILUREXIAOLVYUE76% ~8o% ,PAIYANRESUNSHI18.2% ~22.2% ,SANRERESUNSHIYUE0.7% ,HUAXUEBUWANQUANRANSHAORESUNSHIYUE0.1%,QITARESUNSHIYUE1.0%(JIASHEHOU3XIANGBUBIAN)。YOUCIKEJIAN,PAIYANRESUNSHISHIREMEILUZHUYAORESUNSHI,SHIYINGXIANGREMEILUREXIAOLVDEZHUYAOYINSU。YINCITIGAOREMEILUREXIAOLVBIXUJIANGDIYANQIWENDU。GONGSHI

Qr=B·q=d·F·q,                (1)

Qy=B·V=d·F·V(C·t-Co·to),   (2)

体育外围V= 10.68a+0.43,                (3)

a≈21/[21-φ(Q2)]。             (4)

SHIZHONG:QrWEIYUANYOUFARELIANG(kJ/h);QyWEIPAIYANRESUNSHI(kJ/h);qWEIYUANYOUZHILIANGLIULIANG(kg/h);dWEIYUANYOUMIDU(kg/m3)(t=55℃,d=896kg/m3]);FWEIYUANYOUTIJILIULIANG(m3/h);qWEIYUANYOUDIWEIFAREZHI41900kJ/ kg;VWEIDANWEIYUANYOUYANQILIANG(m3/kg);aWEIKONGQIGUOSHENGXISHU;CWEIYANQIBIRE(kJ/m3·℃);tWEIYANQIWENDU℃;C0WEICHANGWENBIRE1.34 kJ/m3·℃;t0WEICHANGWEN25℃;O2WEIYANGDETIJIFENSHU(%)。PAIYANRESUNSHI:

qy=Qy/Qt=V·(C·t-C0·t0)/q=(10.68a+0.43)×(C·tYI33.5)/q。  (5)

体育外围YOUSHI(5)KEYIKANCHU:YINGXIANGPAIYANRESUNSHIDEZHUYAOYINSUSHIPAIYANWENDUtHEKONGQIGUOSHENGXISHUa,TONGGUODUIBUTONGtHEaQUZHI,FAXIANqySUIaDAERDA,SUItDAERDA,JIaHEtDUIqyYINGXIANGJUNTAI。YINCI,JIANGDIPAIYANRESUNSHIqyZHUYAOSHIJIANGDIPAIYANWENDUtHEJIANGDIKONGQIGUOSHENGXISHUa,DANZAISHIJISHENGCHANZHONG,YIBANJIANGYANGDETIJIFENSHUGUDINGWEI7% 。GUGONGSHI(5)KEJIANXIEWEI:

a=1.50.

体育外围qy=3.926×10-4(C·t-33.5),            (6)

体育外围DANGt=350℃,C=1.40 kJ/m3·℃SHI,qy =17.92% ;

DANGt=250℃,C=1.38 kJ/m3·℃SHI,qy =12.23% 。

KEJIAN,RUYANQIWENDUYOU350℃JIANGDAO250℃SHI,PAIYANRESUNSHIqyYOU17.92%JIANGDAO12.23%,REMEILUREXIAOLVSHANGSHENGLE5.7%,REMEILUREXIAOLVYOU80.28%SHANGSHENGDAO85.98% 。

2 PAIYANWENDUYINGXIANGYINSUFENXI

YOUYUREMEILUNEIDEPANGUANJIEGOUTESHU,NEIWAIPANGUANJIACENGJIANXIHENXIAO,HENNANYONGCHANGGUIFANGFAQINGXIJIETANWUGOU,10DUONIANLAIYIZHIWEIDUIQIQINGHUICHUGOU,SHIJISHANG,NEIWAIPANGUANJIACENGYIJIETANWUGOUWEIZHU,JIHUIBUDUO。JIETANWUGOUFUGAIGUANBI,YINGXIANGDUILIUCHUANRE。YINCI,JIETANWUGOUSHIYINGXIANGPAIYANWENDUDEZHUYAOYINGXIANGYINSU。

体育外围3 GANBINGQINGXICHUWUJISHUYUANLI

干冰清洗是使用于冰介质(颗粒)通过压缩空气加速度来撞击所需清洗的表面,干冰撞击瞬时结合能量的损失及非常迅速的热能传递,使污物表面降温脆化,干冰颗粒机在污物与表面之间瞬时从CO2固体变成气体,千分之几秒时间内CO2体积膨胀8O0倍,使污物脱离表面。清洗下来的污垢,减少了后道工序的热损失,提高了效率。干冰粒子的硬度相对于其他材料低,清洗过程中依赖粒子高速度来达到撞击能量,粒子高速度是通过超音速推进器来实现的。干冰粒子为低温(-78.5℃)介质,清洗过程中干冰对被清洗污物表面热感应产生热效应,使清洗

体育外围WUWUBIAOMIANYUGANBINGZHIJIANCHANSHENGWENCHA,BUTONGCAIZHIZHIJIANWENDUXIAJIANGSHIBIAOMIANWUGOUGUILIE,CISHIGANBINGZHUANGJIERPOHUAILEBIAOMIANWUWUDEWANZHENGXING,WUWUBOLIBIAOMIAN,TONGSHIGANBINGQIHUAJIANGWUWUDAIZOU,DADAOQINGXIZHIMUDE。GANBINGQINGXIJISHUSHUYUHUASHIDAICHUGOUDEXINJISHU,MUQIANYINGYONGYUMOJUQINGXI、DIANQICHUGOU、FADIANJIZUJIJINGDIANCHUWUDENG。GANBINGQINGXIREMEILUJUYOURUXIAYOUDIAN:

(1)GANSHICHUGOU,LIYONGTINGCHEJIHUIJINXING,BUYINGXIANGSHENGCHAN:

体育外围(2)GANBINGQINGXIHOUDUANSHIJIANQIHUAWUCANLIUWU,BUCHANSHENGERCIFEILIAO:

(3)GANBINGQINGXIWEIFEIPOHUAIXINGCHUGOU,BUSUNSHEBEI。

体育外围4 REMEILUGANBINGQINGXIKEXINGXING

GANBINGQINGXIXIAOLVJIAOGAO,YOUBIEYUGAOYASHUIQINGXIHEPENSHAQINGXI,SHIYONGO.6 MPaDEYASUOKONGQIYINSHEGANBINGLIZI,DUIPANGUANDESUNSHANGJIAOXIAO,QINGXICHULAIDETANHUAWUGOUCONGLUDI4GEQINGHUIKONGZHONGRENGONGQINGCHU。QINGXIXUYAODETIAOJIAN(YAKONG、DIAN)MANZU,YOUYULUGUANTESHUJIEGOU,PENZUIJIGONGZHUANGQIJUXUQINGXIGONGSIZHUANMENSHEJIZHIZAO,JINGGUOXIANCHANGQINGXISHIYAN,GANBINGQINGXIDUIQINGXIREMEILUXIAOGUOFEICHANGHAO。

5 GONGCHENGFEIYONG

WEITUOGANBINGQINGXIGONGSIFUWU,QINGXI1TAIREMEILUSUOXUFEIYONGZAI10WANYUANYINEI。GOUJINGANBINGQINGXISHEBEI,PEIBEIGANBINGQINGXIJI(GANBINGPENSHEQI、XIMOJI)HEGANBINGZHIZAOJI(GANBINGZAOLIJI、GANBINGZHILIJI)JINKOUSHEBEIDAYUEZAI30WANYISHANG,GUOCHANJIQIDAYUE20WANYINEI。

体育外围6 QINGXIQIANHOUJINGJIJISHUSHUJUBIJIAO

WOCHANGJUEDINGDUI3TAILAOLUQUANBUYONGYUBINGQINGXI1CI,ZAIBADANYUANTINGCHEXIANJIEJIANXIUQIJIAN(6YUE15RI~7YUE1RI)XI2TAI(1HE3HAO),ZAIQIDANYUANTINGCHEJIANXIUQIJIAN(7YUE25RI~ 8YUE1RI)XI1TAI(2HAO)。YI1HAOLUWEILI,QINGXIZHOUQIYUE4d,JIETANWUGOUYUE100k。

ZAIFUHEWEI40%SHI,YOULIULIANGF=0.6m3/h;

QINGXIQIANPAIYANWENDUt=330℃ ;a=1.5;Qy=16.82 %

体育外围QINGXIHOUPAIYANWENDUt=240℃ ;a=1.5:Qy=11.69%,REMEILUREXIAOLVSHANGSHENGLE5.13%。

MEITIANJIEYOULIANGWO=F·d·0.0513×24=0.6x896×0.0513x24=662 kg

MEINIANJIEYOULIANGWW=WO x 350d=662×350=231 700kg=231.7t

MEINIANJIEYOUFEICC=WWx1100YUAN/t=231.7×1100=254 870YUAN=25.5WANYUAN

体育外围3TAILUMEINIANJIEYOUFEI76.5WANYUAN,XIAOYITOUZIBIDAYU3,SHUOMINGJUECESHIZHENGQUEDE。

7 JIELUN

体育外围(1)TIGAOREMEILUREXIAOLVGUANJIANSHIJIANGDIPAIYANRESUNSHI,YINGXIANGPAIYANRESUNSHIDEZHUYAOYINSUSHIPAIYANWENDUtHEKONGQIGUOSHENGXISHUa,KONGQIGUOSHENGXISHUaYOUYANGHANLIANGQUEDING(JIANYIZUIJIAZHI7%),JIETANWUGOUSHIYINGXIANGPAIYANWENDUDEZHUYAOYINGXIANGYINSU.GANBINGQINGXIREMEILUSHIQUCHUJIETANWUGOUDEZUIJIAJISHUFANGAN。

(2)效益投资比大于3,表明投资费用仅100d就可回收.经济效益显著。

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