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高速气体燃烧器研制

摘要 介绍一种高速气体燃烧器的技术特点、设计要点和具体的设计方法,并利用液体火箭发动机的燃烧技术,为工业加热炉开发了一种高效、节能、低污染的新型高速气体燃烧器,填补了我国民用燃烧器技术的一项空白,已成功地应用在油田、钢铁、陶瓷等行业。
幸运飞艇主页双彩网 关键词 液体火箭发动机,燃烧器,燃烧试验。

1 前 言

幸运飞艇主页双彩网GAOSUQITIRANSHAOQISHIXIANDAIRANSHAOJISHUZAIGONGYERANSHAOQICHANYEDETIXIAN,QICHUKOUCHUGAOWENRANSHAOCHANWUDEPENSHESUDUKEDA100 m/s~300 m/s,JUYOUJIENENG、GAOXIAO、HUOYANDONGLIANGKEKONGDENGJISHUYOUSHI,ZAIFADAGUOJIAYIJINGGUANGFANDIYINGYONGZAIHANGKONG、GANGTIE、HUAGONG、QINGGONGDENGXINGYEDEGEZHONGJIARELUSHANG。WOGUOZAI80NIANDAIYINJINCIXIANGJISHU,BINGYOUYIXIEFANGZHIDECHANPINTOURUSHICHANG,DANSHIYOUYUQICHENGBENGAO、NAIHUOCAILIAONEICHENYIHUAI、SHIYONGSHOUMINGDUAN,YINGXIANGLETUIGUANG。

GAOSUQITIRANSHAOQISHIYIZHONGBARANLIAODEHUAXUENENGZHUANHUANCHENGRANSHAOCHANWUDESHINENGHEDONGNENGDEZHUANGZHI,YETIHUOJIANFADONGJISHIYIZHONGBATUIJINJIDEHUAXUENENGZHUANHUANCHENGRANSHAOCHANWUDERENENGHEDONGNENGDEZHUANGZHI,LIANGZHEZAIGONGZUOYUANLISHANGYOUXIANGSIZHICHU。LIYONGZAIYETIHUOJIANFADONGJIYANZHIFANGMIANDEFENGFUJINGYAN,KAIFAYANZHILEYIZHONGQUANJINSHUJIEGOU,CAIYONGZAISHENGLENGQUEDEGAOXINGNENGDEGAOSUQITIRANSHAOQI。

1.1 高速气体燃烧器的技术特点

a) 精确组织燃烧,燃烧效率99.9%;
b) 宽运行工况:热负荷调节比1∶20, 空气系数0.5~10;
c) 采用分级燃烧,有害气体(NOx)排放符合国家环保标准;
d) 具有烟气引射回流功能,可以将废烟气从炉后引回重新投入炉内;
e) 全金属结构,连续使用寿命3年。

1.2 高速燃烧器提高换热效率的机理

幸运飞艇主页双彩网ZAICHUANTONGDEGONGYELUSHEJIZHONG,RANSHAOQIDEHUOYANSUDUDAYUEWEIMEIMIAOJIMI,DANGRANSHAOCHANWUWENDUZAI600 °C~800 °CSHI,LUNEIDUILIUHUANREYUFUSHEHUANREGEZHAN50%;ZAIRANSHAOCHANWUWENDUWEI800 ℃YISHANGSHI,YIFUSHEHUANREWEIZHU;ZAIRANSHAOCHANWUWENDUDADAO1 400 ℃SHI,FUSHEHUANRESHIDUILIUHUANREDE10BEI,SUOYIDABUFENLUYAOSHEJIZHONG,SHIYIFUSHEHUANREWEIJICHU。DANSHIZAICAIYONGGAOSUQITIRANSHAOQIHOU,JISHIZAIGAOWENQU,LUNEIBEIQIANGHUADEDUILIUHUANREZAIZONGHEHUANREZHONGSUOZHANDEBIZHONGDADATIGAO,JUTISHUOMINGRUXIA。

CAIYONGPUTONGRANSHAOQISHI,HUOYANSUDUDI,RANSHAOCHANWUZAIBEIJIAREWUBIAOMIANDELIUDONGWEICENGLIU,CENGLIUDEDUILIUHUANREXISHUWEI

h1-Nu*λ/d

SHIZHONG NUXIEERTESHUNu=0.332Pr1/3*Re1/2;PrWEIPULANGTESHU;ReWEILEINUOSHU;λWEIQITIDEDAOREXISHU;dWEILIUDAODANGLIANGZHIJING。

幸运飞艇主页双彩网CAIYONGGAOSUQITIRANSHAOQI, HUOYANPENSHESUDUGAO(100 m/s~300 m/s),BEIJIARETIBIAOMIANLIUDONGYIWENLIUWEIZHU,WENLIUFUMIANCENGJUBUFANGREXISHUWEI

幸运飞艇主页双彩网h2=Nu*λ/d

幸运飞艇主页双彩网SHIZHONGNu=Pr1/3(0.036Re0.8-836)

SHEJIARELUNEIQIANGCHICUNWEI6.45m×2.3m×2.9m,RANSHAOCHANWUWENDUWEI1 790 ℃,BEIJIARETIWENDUWEI900 ℃。

CAIYONGPUTONGRANSHAOQI,RANSHAOCHANWULIUSUWEI5 m/sSHI,RANSHAOCHANWUYUBEIJIARETIBIAOMIANZHIJIANDEDUILIUHUANREBIRELIUWEI

q1=h1(tg-tw)=2671X4.18kJ/h*m2

幸运飞艇主页双彩网CAIYONGGAOSUQITIRANSHAOQI,RANSHAOCHANWULIUSUWEI150 m/sSHI,RANSHAOCHANWUYUBEIJIARETIBIAOMIANZHIJIANDEDUILIUHUANREBIRELIUWEI

幸运飞艇主页双彩网q2=h2(tg-tw)=10685X4.18kJ/h*m2

q2SHIq1DE4BEI。

幸运飞艇主页双彩网GUOWAICENGJIUFUSHEJIARELUHEGAOSUDUILIUJIARELUJINXINGGUOBIJIAOSHIYAN,ZAI0 ℃~1 200 ℃DEJIAREGUOCHENGZHONG,FUSHEJIARELUSUOXUJIARESHIJIANSHIGAOSUDUILIUJIARELUDE6BEI,ZAI750 ℃~1 200 ℃DEJIAREGUOCHENGZHONG,FUSHEJIARELUSUOXUJIARESHIJIANSHIGAOSUDUILIUJIARELUDE10BEI。

幸运飞艇主页双彩网1980NIAN,GUONEIYINJINGAOSUQITIRANSHAOQIZAIJINGSHIJIARELUSHANGJINXINGJISHUGAIZAO,YUANYOUDEFUSHEJIARELUCONG0 ℃~650 ℃SHENGWENXUYAO24 h,ERCAIYONGLEGAOSUQITIRANSHAOQIDEJIARELUCONG0 ℃~650 ℃SHENGWENZHIXU4 h,BINGQIERANLIAOXIAOHAOLIANGYEYOUYUCAIYONGLEGAOSUQITIRANSHAOQIKEYIJIESHENG25%~30%。

ZAIYOUTIAN,YONGGAOSUQITIRANSHAOQIGAIZAOCHENGSANHEYIJIARELU,JIAREXIAOLVTIGAOLE1BEI,ERRANLIAOXIAOHAOLIANGJIEYUELE20%。

幸运飞艇主页双彩网GAOSUQITIRANSHAOQIDERANSHAOCHANWUGAOSUCHONGJINJIARELUNEI,JIAODONGDUOBEIDELUNEIQITISUIZHICHANHUN,KEYIDADATIGAOLUNEIWENDUJUNYUNDU。GUOWAIYIJIAGONGCHANGYONGGAOSUQITIRANSHAOQIGAIZAOJIARELUHOU,LUNEIWENDUJUNYUNDUKEYOU±15 ℃TIGAODAO±2 ℃。GUONEIJINGSHIJIARELUCAIYONGGAOSUQITIRANSHAOQIHOU,LUWENJUNYUNDUDADAO±7 ℃。

2 高速气体燃烧器设计要点

2.1 精确组织燃烧

XINYANZHIDEGAOSUQITIRANSHAOQI,WEILEDADAOWANQUANRANSHAO,SHIRANQIHEKONGQITONGGUOZHONGDUODEPENKONGFENBIEJINRURANSHAOSHI,RANQISHELIUYUKONGQISHELIUYIYIZHUANGJI,JUNYUNHUNHE,HECHENGSHELIUSHILIANGFANGXIANGYINGYURANSHAOSHIZHUZHOUXIANPINGXING,BIMIANYISHELIUCHUANTOULINGYISHELIU,ZAOCHENGHUNHEBUJUN。WEILEJIANSHAONOxDESHENGCHENG,CAIQUFENQURANSHAO,QIANQURANSHAOWENDUDIYUHOUQURANSHAOWENDU,ZAIRANSHAOSHICHUKOURANSHAOWENDUZUIGAO。QIANQUSHIPINYANGRANSHAO,HOUQUZENGJIAGONGYANG,ZAIRANSHAOSHICHUKOUDADAOGUOSHENGKONGQIXISHUα=1。

RUCISHEJI,JINENGGOUHELIPEIFENG,BAOZHENGWANQUANRANSHAO,FANGZHICOSHENGCHENG,YOUNENGGOUWEICHIJIAODIDERANSHAOWENDU,JIANSHAOYOUHAIQITINOxDESHENGCHENG。

2.2 燃烧室室壁冷却

幸运飞艇主页双彩网RANSHAOSHINEICHONGMANGAOWENDERANSHAOCHANWU,QIJINSHUSHIBIBIXUYOUZUGOUDELENGQUE,CAINENGANQUANGONGZUO。XIAOFANGYETIHUOJIANFADONGJIDEZAISHENGLENGQUE,ZAIGAOSUQITIRANSHAOQIDESHEJIZHONG,LIYONGKONGQIZAIRANSHAOSHIWAIQIANGLIUDONG,XISHOUSHIBICHUANDAODERELIANG,BAOZHENGSHIBIZAIANQUANDEWENDUFANWEINEIGONGZUO。TONGSHIJIANGKONGQIYURENENGGOUCUJINWANQUANRANSHAOHETIGAOLILUNRANSHAOWENDU。

ZAIRANSHAOSHIPENKOUJUBUGAOWENQU,ZHUANMENSHEJIYOUKONGQIMOBAOHUJINSHUBI。

YOUYUCAIQULEYISHANGDESHEJI,GAOSUQITIRANSHAOQIDESHIYONGSHOUMINGKEDA3NIAN,ERQITADANWEISHEJISHENGCHANDEGAOSUQITIRANSHAOQIDERANSHAOSHIYOUNAIHUOCAILIAOZUONEICHEN,SHIYONGSHOUMINGWEIJIGEYUE,SHENZHIYOUDECHANPIN,QINAIHUOCAILIAONEICHENGONGZUOBUZU3GEYUEJIUKAILIE。

2.3 流阻设计

幸运飞艇主页双彩网ZAIGAOSUQITIRANSHAOQISHEJIZHONG,WEILESHIRANSHAOCHANWUJUYOUZUGOUDEDONGLIANG,RANSHAOSHIYINGGAIYOUYIDINGDEYALI。GENJUYONGHUTIGONGDERANQIWULIHUAXUECANSHUHESUDUYAOQIU,JINXINGRANSHAOJISUANQUEDINGRANSHAOCHANWUDEGEGERELICANSHUHOU,RANSHAOSHINEIRANSHAOCHANWUDEYALIKEYIQIUCHU,JI

幸运飞艇主页双彩网pc=pa/[1-(k-1)w2/2kRT]k/(k-1)

幸运飞艇主页双彩网SHIZHONGpcWEIRANSHAOSHIYALI;paWEIHUANJINGYALI;kWEIRANSHAOCHANWUJUEREZHISHU;RWEIRANSHAOCHANWUQITICHANGSHU;TWEIRANSHAOWENDU;wWEIRANSHAOCHANWUZAIPENKOUCHUDELIUSU。

KONGQIHERANQIJINRURANSHAOQI,LIUJINGGEZIDETONGDAO,JINGGUOPENKONGJINRURANSHAOSHI,YANTUCUNZAIYIDINGDELIUZU。TU1JICHULERANSHAOQIKONGQILIULIANGQkHEKONGQIYAJIANGΔpkDEGUANXI;TU2JICHULERANSHAOQIRANQILIULIANGQrHERANQIYAJIANGΔprDEGUANXI。

 

图1 燃烧器空气流路流量与压降的关系(20 ℃) 图2 燃烧器<a href=http://hlsx658.com/ranshaoqi/index178_list_t1_1.html target=_blank class=infotextkey>天然气</a>流路流量与压降的关系(20 ℃)
图1 燃烧器空气流路流量与压降的关系(20 ℃) 图2 燃烧器天然气流路流量与压降的关系(20 ℃)

RANSHAOQIDEKONGQIRUKOUYALIpkSHIRANSHAOSHIYALIpcHEKONGQIYAJIANGΔpkZHIHE,RANSHAOQIDERANQIRUKOUYALIprSHIRANSHAOSHIYALIpcHERANQIYAJIANGΔprZHIHE。JI:

pk=pc+Δpk
pr=pc+Δpr

pkHEprBUNENGGUOGAO,YINGGAIMANZUYONGHUTIGONGDESHIYONGTIAOJIAN。

GAOSUQITIRANSHAOQIZAISHIYONGTIANRANQIZUORANQISHI,RANSHAOCHANWUSUDUWEI100 m/s,QITIANRANQIRUKOUYALIWEI2 500 Pa,KONGQIRUKOUYALIWEI2 100 Pa。

3 设计计算

3.1 燃烧计算

幸运飞艇主页双彩网TONGGUORANSHAOJISUANQUEDINGRANQIRANSHAODEKONGQIXUYAOLIANGL0、RANSHAOCHANWULIANGVα、RANSHAOCHANWUMIDUρ、QITICHANGSHUR、JUEREZHISHUKHELILUNRANSHAOWENDUT。

a) 根据选定的燃气,确定低位热值Qyd和组成成份的容积百分比。
b) 确定燃烧1m3燃气所需的理论空气量L0为

幸运飞艇主页双彩网L0=4.672/100*[1/2*CO+1/2*H2+(n+m/4)CnHm+3/2*H2S-O2]

幸运飞艇主页双彩网SHIZHONG CO,H2,CnHmWEIRANQICHENGFENRONGJIBAIFENBI。

c) QUEDINGRANSHAO1m3RANQICHANSHENGDERANSHAOCHANWULIANGVyWEI

幸运飞艇主页双彩网Vy=αL0+0.38+0.075Qyd/1000

e) QUEDINGLILUNRANSHAOWENDUTWEI

T=(Qyd+CrTr+CkTkLα)/(VyCy) (α>1)
T=(Qy+CrTr+CkTkLα)/(VyCy) (α<1)

SHIZHONG Cr,Ck,CyFENBIESHIRANQI、KONGQI、RANSHAOCHANWUDEPINGJUNBIRE;Tr、TkFENBIESHIRANQIHEKONGQIDEQISHIWENDU;QyWEIRANQIDEYOUXIAOFARELIANG。

Qy=Qyd-QVy

幸运飞艇主页双彩网SHIZHONG QWEIRANSHAOCHANWUSUOHANDERELIANG。

幸运飞艇主页双彩网Q=3022Xco + 2581Xh2

SHIZHONG Xco、Xh2WEIRANSHAOCO、H2DERONGJIBAIFENBIHANLIANG)。

f) QUEDINGRANSHAOCHANWUMIDUWEI

幸运飞艇主页双彩网α=1 SHI ρy=(44Xco2 + 18XH2O +28XN2)/22.4

α<1 SHI ρy=(44Xco2 + 28Xco + 18XH2O + 2XH20 + 28XN2)/22.4

幸运飞艇主页双彩网SHIZHONGXco2、Xco、Xh2O、Xh2、Xn2FENBIEWEICO2、CO、H2O、H2、N2ZAIRANSHAOCHANWUZHONGDERONGJIBAIFENBIHANLIANG。

g) QUEDINGRANSHAOCHANWUQITICHANGSHURWEI

幸运飞艇主页双彩网R=8.314/Meq

SHIZHONGMeqWEIRANSHAOCHANWUDEZHEHEFENZILIANG。

式中Xi为第i种成分在燃烧产物中的容积百分比含量

 

幸运飞艇主页双彩网SHIZHONGXiWEIDIiZHONGCHENGFENZAIRANSHAOCHANWUZHONGDERONGJIBAIFENBIHANLIANG;MiWEIDIiZHONGCHENGFENDEFENZILIANG。

h) QUEDINGRANSHAOCHANWUJUEREZHISHUkWEI

式中Cpi为燃烧产物中第i种成份的比热

 

SHIZHONGCpiWEIRANSHAOCHANWUZHONGDIiZHONGCHENGFENDEBIRE。

3.2 燃烧室结构设计计算

a) 选定燃烧器的热负荷Q0。
幸运飞艇主页双彩网 b) 确定燃气消耗量Vr(体积)、Gr(质量)为

式中 ρr为燃气密度

 

幸运飞艇主页双彩网SHIZHONG ρrWEIRANQIMIDU。

幸运飞艇主页双彩网c) QUEDINGKONGQIXIAOHAOLIANGVk(TIJI)、Gk(ZHILIANG)WEI

Vk=L0Vr
Gk=Vkρk

幸运飞艇主页双彩网SHIZHONGρkWEIKONGQIMIDU。

d) 确定燃烧产物生成量Gy为 Gy=Gr+Gk
e) 根据使用条件选定燃烧产物在喷口的速度we。

f) QUEDINGRANSHAOSHICHUKOUJIEMIANJIFe、ZHIJINGdeWEI

Fe=GyWe/ρy(1+T/273)

幸运飞艇主页双彩网g) QUEDINGRANSHAOSHIYUANTONGDUANJIEMIANJIF1、ZHIJINGd1WEI

确定燃烧室圆筒段长度L1为 L1=(1~1.4)d1

 

h) QUEDINGRANSHAOSHIYUANTONGDUANZHANGDUL1WEI L1=(1~1.4)d1

3.3 燃烧室喷孔设计计算

3.3.1 燃气喷孔设计计算

幸运飞艇主页双彩网a) RANQIPENSHESUDUwrjDEXUANDING。

XUANDINGDEYUANZESHI:RANQISHELIUYUXIANGYINGDEKONGQISHELIUZHUANGJIHOU,HECHENGSHELIUFANGXIANGYURANSHAOSHIZHOUXIANPINGXING。

b) 确定燃气喷孔总面积Frj为 Frj=Vr/wrj
c) 确定燃气喷射流量沿燃气喷管长度的百分比分布。

 

GENJUTU3,RANQILIULIANGZAIRANSHAOSHIHUNRANQUDEBAIFENBIFENBU,QUEDINGRANQIPENSHELIULIANGYANRANQIPENGUANZHANGDUDEBAIFENBIFENBU。

 

燃烧室内空气燃气流量的分配

幸运飞艇主页双彩网TU3 RANSHAOSHINEIKONGQIRANQILIULIANGDEFENPEI

幸运飞艇主页双彩网d) QUEDINGRANQIPENKONGYANRANQIPENGUANZHANGDUDEFENBU。

幸运飞艇主页双彩网YANRANQIPENGUANZHANGDUFANGXIANGGONGYOUnZURANQIPENKONG,JIANJUYUEWEI20 mm;YANRANQIPENGUANYUANZHOUFANGXIANG,MEIZUGONGYOUmGEPENKONG,m=12~24。

e) QUEDINGGEZURANQIPENKONGZHIJING。

幸运飞艇主页双彩网GENJURANQILIULIANGYANPENGUANZHANGDUDEBAIFENBIFENBU,KEYIZHIDAOPENKONGDEMIANJIBAIFENBIFENBU,ZHIDAOMEIZUPENKONGDEZONGMIANJI,SHETONGZUPENKONGZHIJINGXIANGTONG,ZEGAIPENKONGZHIJINGKEQIU。

3.3.2 空气喷孔设计计算

a) KONGQIPENSHESUDUwkjDEXUANDING。

XUANDINGDEYUANZETONG3.3.1,ZAIEDINGSHEJIZHUANGTAIXIA,JIANYIwkj≈15m/s。

b) 确定空气喷孔总面积Fkj为 Fkj=Vk/wkj
c) 确定空气喷射流量在燃烧室内壁的分布。

GENJUTU3QUEDINGKONGQILIULIANG,ZAIEDINGSHEJIZHUANGTAIXIA,JIANYIZAIDIANHUOQUDEKONGQIGUOSHENGXISHUα≈0.6;ZAIHUNRANQUMODUANα≈0.8;ZAIWEIRANSHIMODUANα≈1。TU4WEIRANSHAOSHINEIQITILIUCHENGTU。

燃烧室内气体流程图

 

TU4 RANSHAOSHINEIQITILIUCHENGTU

d) HUNRANQUKONGQIPENKONGFENZU。

幸运飞艇主页双彩网GENJURANLIAOPENKONGFENZUQUEDINGKONGQIPENKONGFENZU,MEIZUKONGQIPENKONGGESHUWEIm。

幸运飞艇主页双彩网e) WEIRANQUKONGQIPENKONGDEQUEDING。

WEIRANQUKONGQILIULIANGYUEZHANKONGQIZONGLIULIANGDE20%~30%,KONGQIPENKONGYINGGAIZHIJINGXIAO、SHULIANGDA,ZAIWEIRANQUTONGNEIBIXINGCHENGJUNYUNDEKONGQILENGQUEMO。

4 燃烧试验

GAOSUQITIRANSHAOQIJINGTIANRANQIRANSHAOSHIYAN,ZHENGMINGQIGONGZUOKEKAO、CAOZUOJIANBIAN。

4.1 点火方式

RANSHAOSHIYANCAIYONGLELIANGZHONGDIANDIANHUOFANGSHI,YIZHONGSHIGAONENG

幸运飞艇主页双彩网DIANHUOQIDHZ-103,DIANHUOPINLV1.5CI/s,ZHUNENG12J/CI;LINGYIZHONGSHIHUOYANJIANCEDIANHUOQIHJ-1,DIANHUODIANYA15 000 V,DIANHUOZUIWEIQICHEHUOHUASAI。

4.2 点火程序

a) 按额定负荷所需总空气量的1/4供风;
b) 电点火器通电;
c) 打开天然气开关,在α≈0.6时,即可成功点火。

4.3 热负荷调节

EDINGREFUHEWEI30 m3/hDERANSHAOQI,ZAISHIYANZHONG,TIANRANQILIANGJIANSHAOZHI1.6 m3/hSHI,RENGNENGWEICHIRANSHAO(α≈14)。

4.4 空气系数调节

SHIYANZHONG,RANSHAOQIDEKONGQIXISHUDIAOJIEFANWEIWEI0.5~20,JUNKEWEICHIRANSHAO。

4.5 燃气温度调节

幸运飞艇主页双彩网SHIYANZHONG,RANSHAOQICHUKOUSHICEWENDUBIANHUAFANWEIWEI90 ℃~1 300 ℃(α≥2)。

5 结 论

幸运飞艇主页双彩网GAOSUQITIRANSHAOQISHILIYONGYETIHUOJIANFADONGJIDERANSHAOJISHUWEIGONGYEJIARELUKAIFADEYIZHONGGAOXIAO、JIENENG、DIWURANRANSHAOQI。JINGTIANRANQIRANSHAOSHIYAN,ZHENGMINGQIGONGZUOKEKAO、CAOZUOJIANDAN、REFUHEDIAOJIEFANWEIDA、KONGQIGUOSHENGXISHUJIRANQIWENDUDIAOJIEFANWEIDA。GAIRANSHAOQIMUQIANYICHENGGONGDIYINGYONGZAIYOUTIAN、TAOCI、GANGTIEDENGXINGYEDEJIARELUSHANG。



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