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高速氣體燃燒器研制

摘要 介紹一種高速氣體燃燒器的技術特點、設計要點和具體的設計方法,并利用液體火箭發動機的燃燒技術,為工業加熱爐開發了一種高效、節能、低污染的新型高速氣體燃燒器,填補了我國民用燃燒器技術的一項空白,已成功地應用在油田、鋼鐵、陶瓷等行業。
關鍵詞 液體火箭發動機,燃燒器,燃燒試驗。

1 前 言

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 高速氣體燃燒器的技術特點

a) 精確組織燃燒,燃燒效率99.9%;
b) 寬運行工況:熱負荷調節比1∶20, 空氣系數0.5~10;
c) 采用分級燃燒,有害氣體(NOx)排放符合國家環保標準;
d) 具有煙氣引射回流功能,可以將廢煙氣從爐后引回重新投入爐內;
王中王正版四不像图 e) 全金屬結構,連續使用壽命3年。

1.2 高速燃燒器提高換熱效率的機理

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

王中王正版四不像图SHIZHONG NUXIEERTESHUNu=0.332Pr1/3*Re1/2;PrWEIPULANGTESHU;ReWEILEINUOSHU;λWEIQITIDEDAOREXISHU;dWEILIUDAODANGLIANGZHIJING。

CAIYONGGAOSUQITIRANSHAOQI, HUOYANPENSHESUDUGAO(100 m/s~300 m/s),BEIJIARETIBIAOMIANLIUDONGYIWENLIUWEIZHU,WENLIUFUMIANCENGJUBUFANGREXISHUWEI

h2=Nu*λ/d

王中王正版四不像图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

CAIYONGGAOSUQITIRANSHAOQI,RANSHAOCHANWULIUSUWEI150 m/sSHI,RANSHAOCHANWUYUBEIJIARETIBIAOMIANZHIJIANDEDUILIUHUANREBIRELIUWEI

王中王正版四不像图q2=h2(tg-tw)=10685X4.18kJ/h*m2

q2SHIq1DE4BEI。

王中王正版四不像图GUOWAICENGJIUFUSHEJIARELUHEGAOSUDUILIUJIARELUJINXINGGUOBIJIAOSHIYAN,ZAI0 ℃~1 200 ℃DEJIAREGUOCHENGZHONG,FUSHEJIARELUSUOXUJIARESHIJIANSHIGAOSUDUILIUJIARELUDE6BEI,ZAI750 ℃~1 200 ℃DEJIAREGUOCHENGZHONG,FUSHEJIARELUSUOXUJIARESHIJIANSHIGAOSUDUILIUJIARELUDE10BEI。

1980NIAN,GUONEIYINJINGAOSUQITIRANSHAOQIZAIJINGSHIJIARELUSHANGJINXINGJISHUGAIZAO,YUANYOUDEFUSHEJIARELUCONG0 ℃~650 ℃SHENGWENXUYAO24 h,ERCAIYONGLEGAOSUQITIRANSHAOQIDEJIARELUCONG0 ℃~650 ℃SHENGWENZHIXU4 h,BINGQIERANLIAOXIAOHAOLIANGYEYOUYUCAIYONGLEGAOSUQITIRANSHAOQIKEYIJIESHENG25%~30%。

王中王正版四不像图ZAIYOUTIAN,YONGGAOSUQITIRANSHAOQIGAIZAOCHENGSANHEYIJIARELU,JIAREXIAOLVTIGAOLE1BEI,ERRANLIAOXIAOHAOLIANGJIEYUELE20%。

GAOSUQITIRANSHAOQIDERANSHAOCHANWUGAOSUCHONGJINJIARELUNEI,JIAODONGDUOBEIDELUNEIQITISUIZHICHANHUN,KEYIDADATIGAOLUNEIWENDUJUNYUNDU。GUOWAIYIJIAGONGCHANGYONGGAOSUQITIRANSHAOQIGAIZAOJIARELUHOU,LUNEIWENDUJUNYUNDUKEYOU±15 ℃TIGAODAO±2 ℃。GUONEIJINGSHIJIARELUCAIYONGGAOSUQITIRANSHAOQIHOU,LUWENJUNYUNDUDADAO±7 ℃。

2 高速氣體燃燒器設計要點

2.1 精確組織燃燒

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

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

2.2 燃燒室室壁冷卻

RANSHAOSHINEICHONGMANGAOWENDERANSHAOCHANWU,QIJINSHUSHIBIBIXUYOUZUGOUDELENGQUE,CAINENGANQUANGONGZUO。XIAOFANGYETIHUOJIANFADONGJIDEZAISHENGLENGQUE,ZAIGAOSUQITIRANSHAOQIDESHEJIZHONG,LIYONGKONGQIZAIRANSHAOSHIWAIQIANGLIUDONG,XISHOUSHIBICHUANDAODERELIANG,BAOZHENGSHIBIZAIANQUANDEWENDUFANWEINEIGONGZUO。TONGSHIJIANGKONGQIYURENENGGOUCUJINWANQUANRANSHAOHETIGAOLILUNRANSHAOWENDU。

ZAIRANSHAOSHIPENKOUJUBUGAOWENQU,ZHUANMENSHEJIYOUKONGQIMOBAOHUJINSHUBI。

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

2.3 流阻設計

ZAIGAOSUQITIRANSHAOQISHEJIZHONG,WEILESHIRANSHAOCHANWUJUYOUZUGOUDEDONGLIANG,RANSHAOSHIYINGGAIYOUYIDINGDEYALI。GENJUYONGHUTIGONGDERANQIWULIHUAXUECANSHUHESUDUYAOQIU,JINXINGRANSHAOJISUANQUEDINGRANSHAOCHANWUDEGEGERELICANSHUHOU,RANSHAOSHINEIRANSHAOCHANWUDEYALIKEYIQIUCHU,JI

pc=pa/[1-(k-1)w2/2kRT]k/(k-1)

SHIZHONGpcWEIRANSHAOSHIYALI;paWEIHUANJINGYALI;kWEIRANSHAOCHANWUJUEREZHISHU;RWEIRANSHAOCHANWUQITICHANGSHU;TWEIRANSHAOWENDU;wWEIRANSHAOCHANWUZAIPENKOUCHUDELIUSU。

KONGQIHERANQIJINRURANSHAOQI,LIUJINGGEZIDETONGDAO,JINGGUOPENKONGJINRURANSHAOSHI,YANTUCUNZAIYIDINGDELIUZU。TU1GEICHULERANSHAOQIKONGQILIULIANGQkHEKONGQIYAJIANGΔpkDEGUANXI;TU2GEICHULERANSHAOQIRANQILIULIANGQrHERANQIYAJIANGΔprDEGUANXI。

 

圖1 燃燒器空氣流路流量與壓降的關系(20 ℃) 圖2 燃燒器<a href=http://zqxinhe.com.cn/ranshaoqi/index178_list_t1_1.html target=_blank class=infotextkey>天然氣</a>流路流量與壓降的關系(20 ℃)
圖1 燃燒器空氣流路流量與壓降的關系(20 ℃) 圖2 燃燒器天然氣流路流量與壓降的關系(20 ℃)

RANSHAOQIDEKONGQIRUKOUYALIpkSHIRANSHAOSHIYALIpcHEKONGQIYAJIANGΔpkZHIHE,RANSHAOQIDERANQIRUKOUYALIprSHIRANSHAOSHIYALIpcHERANQIYAJIANGΔprZHIHE。JI:

pk=pc+Δpk
pr=pc+Δpr

pkHEprBUNENGGUOGAO,YINGGAIMANZUYONGHUTIGONGDESHIYONGTIAOJIAN。

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

3 設計計算

3.1 燃燒計算

TONGGUORANSHAOJISUANQUEDINGRANQIRANSHAODEKONGQIXUYAOLIANGL0、RANSHAOCHANWULIANGVα、RANSHAOCHANWUMIDUρ、QITICHANGSHUR、JUEREZHISHUKHELILUNRANSHAOWENDUT。

a) 根據選定的燃氣,確定低位熱值Qyd和組成成份的容積百分比。
b) 確定燃燒1m3燃氣所需的理論空氣量L0為

王中王正版四不像图L0=4.672/100*[1/2*CO+1/2*H2+(n+m/4)CnHm+3/2*H2S-O2]

SHIZHONG CO,H2,CnHmWEIRANQICHENGFENRONGJIBAIFENBI。

王中王正版四不像图c) QUEDINGRANSHAO1m3RANQICHANSHENGDERANSHAOCHANWULIANGVyWEI

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

王中王正版四不像图SHIZHONG QWEIRANSHAOCHANWUSUOHANDERELIANG。

Q=3022Xco + 2581Xh2

SHIZHONG Xco、Xh2WEIRANSHAOCO、H2DERONGJIBAIFENBIHANLIANG)。

王中王正版四不像图f) QUEDINGRANSHAOCHANWUMIDUWEI

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

王中王正版四不像图α<1 SHI ρy=(44Xco2 + 28Xco + 18XH2O + 2XH20 + 28XN2)/22.4

SHIZHONGXco2、Xco、Xh2O、Xh2、Xn2FENBIEWEICO2、CO、H2O、H2、N2ZAIRANSHAOCHANWUZHONGDERONGJIBAIFENBIHANLIANG。

g) QUEDINGRANSHAOCHANWUQITICHANGSHURWEI

王中王正版四不像图R=8.314/Meq

王中王正版四不像图SHIZHONGMeqWEIRANSHAOCHANWUDEZHEHEFENZILIANG。

式中Xi為第i種成分在燃燒產物中的容積百分比含量

 

SHIZHONGXiWEIDIiZHONGCHENGFENZAIRANSHAOCHANWUZHONGDERONGJIBAIFENBIHANLIANG;MiWEIDIiZHONGCHENGFENDEFENZILIANG。

h) QUEDINGRANSHAOCHANWUJUEREZHISHUkWEI

式中Cpi為燃燒產物中第i種成份的比熱

 

王中王正版四不像图SHIZHONGCpiWEIRANSHAOCHANWUZHONGDIiZHONGCHENGFENDEBIRE。

3.2 燃燒室結構設計計算

a) 選定燃燒器的熱負荷Q0。
b) 確定燃氣消耗量Vr(體積)、Gr(質量)為

式中 ρr為燃氣密度

 

SHIZHONG ρrWEIRANQIMIDU。

c) QUEDINGKONGQIXIAOHAOLIANGVk(TIJI)、Gk(ZHILIANG)WEI

Vk=L0Vr
王中王正版四不像图 Gk=Vkρk

王中王正版四不像图SHIZHONGρkWEIKONGQIMIDU。

d) 確定燃燒產物生成量Gy為 Gy=Gr+Gk
e) 根據使用條件選定燃燒產物在噴口的速度we。

王中王正版四不像图f) QUEDINGRANSHAOSHICHUKOUJIEMIANJIFe、ZHIJINGdeWEI

Fe=GyWe/ρy(1+T/273)

g) QUEDINGRANSHAOSHIYUANTONGDUANJIEMIANJIF1、ZHIJINGd1WEI

確定燃燒室圓筒段長度L1為 L1=(1~1.4)d1

 

王中王正版四不像图h) QUEDINGRANSHAOSHIYUANTONGDUANCHANGDUL1WEI L1=(1~1.4)d1

3.3 燃燒室噴孔設計計算

3.3.1 燃氣噴孔設計計算

王中王正版四不像图a) RANQIPENSHESUDUwrjDEXUANDING。

王中王正版四不像图XUANDINGDEYUANZESHI:RANQISHELIUYUXIANGYINGDEKONGQISHELIUZHUANGJIHOU,HECHENGSHELIUFANGXIANGYURANSHAOSHIZHOUXIANPINGXING。

b) 確定燃氣噴孔總面積Frj為 Frj=Vr/wrj
c) 確定燃氣噴射流量沿燃氣噴管長度的百分比分布。

 

GENJUTU3,RANQILIULIANGZAIRANSHAOSHIHUNRANQUDEBAIFENBIFENBU,QUEDINGRANQIPENSHELIULIANGYANRANQIPENGUANCHANGDUDEBAIFENBIFENBU。

 

燃燒室內空氣燃氣流量的分配

王中王正版四不像图TU3 RANSHAOSHINEIKONGQIRANQILIULIANGDEFENPEI

d) QUEDINGRANQIPENKONGYANRANQIPENGUANCHANGDUDEFENBU。

王中王正版四不像图YANRANQIPENGUANCHANGDUFANGXIANGGONGYOUnZURANQIPENKONG,JIANJUYUEWEI20 mm;YANRANQIPENGUANYUANZHOUFANGXIANG,MEIZUGONGYOUmGEPENKONG,m=12~24。

王中王正版四不像图e) QUEDINGGEZURANQIPENKONGZHIJING。

王中王正版四不像图GENJURANQILIULIANGYANPENGUANCHANGDUDEBAIFENBIFENBU,KEYIZHIDAOPENKONGDEMIANJIBAIFENBIFENBU,ZHIDAOMEIZUPENKONGDEZONGMIANJI,SHETONGZUPENKONGZHIJINGXIANGTONG,ZEGAIPENKONGZHIJINGKEQIU。

3.3.2 空氣噴孔設計計算

a) KONGQIPENSHESUDUwkjDEXUANDING。

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

b) 確定空氣噴孔總面積Fkj為 Fkj=Vk/wkj
c) 確定空氣噴射流量在燃燒室內壁的分布。

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

燃燒室內氣體流程圖

 

TU4 RANSHAOSHINEIQITILIUCHENGTU

王中王正版四不像图d) HUNRANQUKONGQIPENKONGFENZU。

GENJURANLIAOPENKONGFENZUQUEDINGKONGQIPENKONGFENZU,MEIZUKONGQIPENKONGGESHUWEIm。

e) WEIRANQUKONGQIPENKONGDEQUEDING。

王中王正版四不像图WEIRANQUKONGQILIULIANGYUEZHANKONGQIZONGLIULIANGDE20%~30%,KONGQIPENKONGYINGGAIZHIJINGXIAO、SHULIANGDA,ZAIWEIRANQUTONGNEIBIXINGCHENGJUNYUNDEKONGQILENGQUEMO。

4 燃燒試驗

GAOSUQITIRANSHAOQIJINGTIANRANQIRANSHAOSHIYAN,ZHENGMINGQIGONGZUOKEKAO、CAOZUOJIANBIAN。

4.1 點火方式

RANSHAOSHIYANCAIYONGLELIANGZHONGDIANDIANHUOFANGSHI,YIZHONGSHIGAONENG

DIANHUOQIDHZ-103,DIANHUOPINLV1.5CI/s,ZHUNENG12J/CI;LINGYIZHONGSHIHUOYANJIANCEDIANHUOQIHJ-1,DIANHUODIANYA15 000 V,DIANHUOZUIWEIQICHEHUOHUASAI。

4.2 點火程序

a) 按額定負荷所需總空氣量的1/4供風;
b) 電點火器通電;
王中王正版四不像图 c) 打開天然氣開關,在α≈0.6時,即可成功點火。

4.3 熱負荷調節

王中王正版四不像图EDINGREFUHEWEI30 m3/hDERANSHAOQI,ZAISHIYANZHONG,TIANRANQILIANGJIANSHAOZHI1.6 m3/hSHI,RENGNENGWEICHIRANSHAO(α≈14)。

4.4 空氣系數調節

SHIYANZHONG,RANSHAOQIDEKONGQIXISHUDIAOJIEFANWEIWEI0.5~20,JUNKEWEICHIRANSHAO。

4.5 燃氣溫度調節

王中王正版四不像图SHIYANZHONG,RANSHAOQICHUKOUSHICEWENDUBIANHUAFANWEIWEI90 ℃~1 300 ℃(α≥2)。

5 結 論

GAOSUQITIRANSHAOQISHILIYONGYETIHUOJIANFADONGJIDERANSHAOJISHUWEIGONGYEJIARELUKAIFADEYIZHONGGAOXIAO、JIENENG、DIWURANRANSHAOQI。JINGTIANRANQIRANSHAOSHIYAN,ZHENGMINGQIGONGZUOKEKAO、CAOZUOJIANDAN、REFUHEDIAOJIEFANWEIDA、KONGQIGUOSHENGXISHUJIRANQIWENDUDIAOJIEFANWEIDA。GAIRANSHAOQIMUQIANYICHENGGONGDIYINGYONGZAIYOUTIAN、TAOCI、GANGTIEDENGXINGYEDEJIARELUSHANG。



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