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脉冲燃烧技术在工业炉上的应用
1  前言 

GONGYELUDERANSHAOKONGZHISHUIPINGZHIJIEYINGXIANGDAOSHENGCHANDEGEXIANGZHIBIAO,LIRU:CHANPINZHILIANG、NENGYUANXIAOHAODENG。MUQIANGUONEIDEGONGYELUYIBANDOUCAIYONGLIANXURANSHAOKONGZHIDEXINGSHI,JITONGGUOKONGZHIRANLIAO、ZHURANKONGQILIULIANGDEDAXIAOLAISHILUNEIDEWENDU、RANSHAOQIFENDADAOGONGYIYAOQIU。YOUYUZHEIZHONGLIANXURANSHAOKONGZHIDEFANGSHIWANGWANGSHOUDAORANLIAOLIULIANGDEDIAOJIEHECELIANGDENGHUANJIEDEZHIYUE,SUOYIMUQIANDADUOSHUGONGYELUDEKONGZHIXIAOGUOBUJIA。SUIZHEGONGYELUGONGYEDEXUNMENGFAZHAN,MAICHONGSHIRANSHAOKONGZHIJISHUYEYINGYUNERSHENG,BINGZAIGUONEIWAIDEDAOYIDINGCHENGDUDEYINGYONG,QUDELELIANGHAODESHIYONGXIAOGUO。 

2  GONGYELUXINGYECAIYONGMAICHONGRANSHAODEBIYAOXING 

MUQIANGAODANGGONGYECHANPINDUILUNEIWENDUCHANGDEJUNYUNXINGYAOQIUJIAOGAO,DUIRANSHAOQIFENDEWENDINGKEKONGXINGYAOQIUJIAOGAO,SHIYONGCHUANTONGDELIANXURANSHAOKONGZHIWUFASHIXIAN。SUIZHEKUANDUANMIAN、DARONGLIANGDEGONGYELUDECHUXIAN,BIXUCAIYONGMAICHONGRANSHAOKONGZHIJISHUCAINENGKONGZHILUNEIWENDUCHANGDEJUNYUNXING。 

3  MAICHONGRANSHAOKONGZHIDEYUANLIHEYOUSHI 

顾名思义,脉冲燃烧控制采用的是一种间断燃烧的方式,使用脉宽调制技术,通过调节燃烧时间的占空比(通断比)实现窑炉的温度控制。燃料流量可通过压力调整预先设定,烧嘴一旦工作,就处于满负荷状态,保证烧嘴燃烧时的燃气出口速度不变。当需要升温时,烧嘴燃烧时间加长,间断时间减小;需要降温时,烧嘴燃烧时间减小,间断时间加长。控制图见图1。
 

MAICHONGRANSHAOKONGZHIDEZHUYAOYOUDIANWEI: 

传热效率高,大大降低能耗。 
可提高炉内温度场的均匀性。 
无需在线调整,即可实现燃烧气氛的精确控制。 
可提高烧嘴的负荷调节比。 
系统简单可靠,造价低。 
减少NOx的生成。 

PUTONGSHAOZUIDEDIAOJIEBIYIBANWEI1:4ZUOYOU,DANGSHAOZUIZAIMANFUHEGONGZUOSHI,RANQILIUSU、HUOYANXINGZHUANG、REXIAOLVJUNKEDADAOZUIJIAZHUANGTAI,DANDANGSHAOZUILIULIANGJIEJINQIZUIXIAOLIULIANGSHI,REFUHEZUIXIAO,RANQILIUSUDADAJIANGDI,HUOYANXINGZHUANGDABUDAOYAOQIU,REXIAOLVJIJUXIAJIANG,GAOSUSHAOZUIGONGZUOZAIMANFUHELIULIANG50%YIXIASHI,SHANGSHUGEXIANGZHIBIAOJUSHEJIYAOQIUJIUYOULEJIAODADECHAJU。MAICHONGRANSHAOZEBURAN,WULUNZAIHEZHONGQINGKUANGXIA,SHAOZUIZHIYOULIANGZHONGGONGZUOZHUANGTAI,YIZHONGSHIMANFUHEGONGZUO,LINGYIZHONGSHIBUGONGZUO,ZHISHITONGGUODIAOZHENGLIANGZHONGZHUANGTAIDESHIJIANBIJINXINGWENDUDIAOJIE,SUOYICAIYONGMAICHONGRANSHAOKEMIBUSHAOZUIDIAOJIEBIDIDEQUEXIAN,XUYAODIWENKONGZHISHIRENGNENGBAOZHENGSHAOZUIGONGZUOZAIZUIJIARANSHAOZHUANGTAI。ZAISHIYONGGAOSUSHAOZUISHI,RANQIPENCHUSUDUKUAI,SHIZHOUWEIXINGCHENGFUYA,JIANGDALIANGYAONEIYANQIXIRENZHURANQINEI,JINXINGCHONGFENJIAOBANHUNHE,YANZHANGLEYANQIZAIYAONEIDEZHILIUSHIJIAN,ZENGJIALEYANQIYUZHIPINDEJIECHUSHIJIAN,CONGERTIGAOLEDUILIUCHUANREXIAOLV,LINGWAI,YAONEIYANQIYURANQICHONGFENJIAOBANHUNHE,SHIRANQIWENDUYUYAONEIYANQIWENDUJIEJIN,TIGAOYAONEIWENDUCHANGDEJUNYUNXING,JIANSHAOGAOWENRANQIDUIBEIJIARETIDEZHIJIERECHONGJI。 

RANSHAOQIFENDEDIAOJIESHITIGAOGONGYEYAOLUXINGNENGBIBUKESHAODEYIGEHUANJIE,ERCHUANTONGDELIANXURANSHAOKONGZHIZHINENGTONGGUOZAIXIANCELIANGYANQICANYANGLIANG,FANKUIJIRANSHAOQIFENKONGZHIQI,RANHOUSHISHIDIAOJIEKONGZHIZHURANKONGQILIULIANGZHIXINGQIDESHUCHU,CAINENGJINGQUEKONGZHILUNEIDERANSHAOQIFEN。YOUYUJIANCEYANQICANYANGDEYANGHUAGAOCHUANGANQIDEKEKAOXING、SHOUMINGHEJIAGEDEYUANYIN,ZAIGONGYEXIANCHANGDESHIYONGWANGWANGBULIXIANG。YOUXIEYAOLUZIKONGXITONGGANCUICAIYONGYITAIBILIGENSUIQI,SHIZHURANKONGQIDELIULIANGYURANLIAODELIULIANGCHENGGUDINGDEBILI,DANZHEIZHONGFANGFABUDEBUJIANGZHURANKONGQIDEFUYULIANGLIUDEHENDA,DABUDAOZUIJIADEJIENENGHEKONGZHIGUOSHENGYANGHANLIANG(HUOGUOSHENGKONGQIXISHU)DEYAOQIU。CAIYONGMAICHONGRANSHAOKONGZHIFANGSHI,KEYIJIANGYOUYAHEFENGYAYICIXINGDIAOZHENGDAOHESHIZHI,ZAIXITONGTOURENYUNXINGHOU,ZHIXUBAOCHIZHEILIANGGEYALIWENDINGJIKE。DUIYALIJINXINGCELIANGHEKONGZHIYAOBILIULIANGJIANDANDEDUO,KEYIGENJUXITONGDESHIJIQINGKUANGCAIQUQUANZIDONGKONGZHI,YEKEYICAIQURENGONGSHOUDONGKONGZHI。 

YULIANXURANSHAOKONGZHIXIANGBI,MAICHONGRANSHAOKONGZHIXITONGZHONGCANYUKONGZHIDEYIBIAODADAJIANSHAO,JINYOUWENDUCHUANGANQI、KONGZHIQIHEZHIXINGQI,SHENGLVELEDALIANGJIAGEANGGUIDELIULIANG、YALIJIANCEKONGZHIJIGOU。BINGQIE,YOUYUZHIXUYAOLIANGWEISHIKAIGUANKONGZHI,ZHIXINGQIYEYOUYUANLAIDEQIDONG(DIANDONG)FAMENBIANWEIDIANCIFAMEN,ZENGJIALEXITONGDEKEKAOXING,DADAJIANGDILEXITONGZAOJIA。 

4  MAICHONGRANSHAOKONGZHIJISHUZAIGONGYELUYAOZHONGDEYINGYONG 

WOGONGSIWEIZAIGONGYELUXINGYEZHONGPUJIMAICHONGRANSHAOKONGZHIJISHU,YANZHIKAIFACHULE“SHENWUMAICHONGRANSHAOXITONG”,YOUGAOSURANSHAOQIHEGONGYELUKONGZHIXITONGLIANGBUFENZUCHENG,CAIYONGMAICHONGRANSHAOJISHULAIWANCHENGGONGYELUDESHENGWEN、KONGWEN。DUIYURANQIYAOLUNEIBUWENDUCHANGHEWENDUBODONGLI±2°C,DUIYURANYOU(CHAIYOU)YAOLUNEIBUWENDUCHANGHEWENDUBODONGWEI±3°C,ZAISHIYONGZHONGCHAIYOUWEIRANLIAODEYAOLUSHANGXIAOGUOLIANGHAO。 

普通燃烧器当窑炉内部温度低于燃料自燃温度时,燃烧器燃料间断后火焰立即熄灭,无法继续燃烧,为此我公司研制开发了带有先导点火装的高速燃烧器,此先导点火装置的发热量只占燃烧器设计发热量的1/20~1/30,对炉内温度不会产生影响,解决了熄火这一问题,并采用当今最先进的雾化技术--气泡雾化技术,使燃烧器的雾化效果更好、雾化介质使用量更少,原来烧轻柴油的窑炉现可烧重柴油。见图2。
 

工业炉控制系统采用工业PC机作为控制单元,采用先进的现场总线体系结构,功能强大、画面丰富、用户界面友好。所有部件均选用进口产品,从而使系统更加可靠。系统结构见图3。
 


该系统具有以下功能: 

实时监测炉内各点的温度、烟气残氧、炉膛压力、油(煤气)压、助燃风压、燃料流量和助燃风流量等参数。 
具有上、下限报警功能,报警打印功能,报警上、下限由用户设定,并能将报警记录储存,用户可任意查询、打印。 
可按用户设定的温度值或温度曲线对炉内各区段进行升、降控制,其中升温采用脉冲燃烧控制,降温采用强制脉冲风冷控制。 
可按用户设定的燃烧气氛对炉内的烟气残氧进行控制。 
可对炉膛压力进行控制。 
可对窑炉的进出料进行控制。 
具有历史数据查询功能,可按用户需要存储、显示、打印历史数据。 
具有报表打印功能,实时脱机打印班报、日报、月报。 
具有动态工艺图,可显示整个窑炉的工艺流程图,实时动态显示炉内各点参数,实时动态显示炉内火焰燃烧状态。
 


在实际应用过程中,采用普通的脉宽调制的方法调节燃烧占空比时,当占空比接近0%或100%时,间断或燃烧的时间太短,现场的运行效果不理想,于是我们引人了最小时间这一概念,将间断和燃烧的最小时间定为3秒,当占空比接近0%或100%时,延长相应的燃烧和间断时间即可解决这一问题。 

5  JIELUN 

MAICHONGRANSHAOZUOWEIYIXIANGXINJISHUYOUZHEGUANGKUODEYINGYONGQIANJING,KEGUANGFANYINGYONGYUTAOCI、YEJIN、SHIHUADENGXINGYE,DUITIGAOCHANPINZHILIANG、JIANGDIRANHAO、JIANSHAOWURANJIANGFAHUIZHONGDAZUOYONG,SHIGONGYELUXINGYEZIDONGKONGZHIDEYICIGEXIN,JIANGCHENGWEIWEILAIGONGYELURANSHAOJISHUDEFAZHANFANGXIANG。

ZUOZHE:YUZHAOHUI WUDAOHONG

 
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