凤凰棋牌

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不同热交换结构中小型燃气式蒸汽发生器优缺点比较

 

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     ZHONGSUOZHOUZHI,ZHONGXIAOXINGRANQISHIZHENGQIFASHENGQIZHUYAOYOURANQIGONGJIYUKONGZHIXITONG、JINSHUIYUZHENGQIWENDUKONGZHIHEANQUANBAOZHANGXITONG、REJIAOHUANXITONG、SHUIGOUQINGCHUYUQINGXIXITONG、WEIQICHOUPAIXITONGDENGZUCHENG,XIANJINYIDIANDEHAIJUYOUWEIQIYUREHUISHOUXITONGJIEGOU。MUQIAN,RANQIGONGJIYUKONGZHIXITONG、JINSHUIYUZHENGQIWENDUKONGZHIHEANQUANBAOZHANGXITONGHEWEIQICHOUPAIXITONGDOUJIBENSHIJINGGUOYOUHUAHOUDEBIAOZHUNHUACHANPIN,RUOZAIGAIJINSHEJIDUIXIAOLVYINGXIANGYEHENXIAO,WOMENGENGYINGZHUZHONGGAILEIBUJIANZHILIANGDEHUANJINGSHIYIXINGHENAIJIUXING。

凤凰棋牌     SHICHANGSHANGBUTONGRANQISHICHANPINCHAYI,ZHUYAOYINSUSHIZHENGQIFASHENGCHUSHUIJIEGOUTEZHENG、SHIFOUDAIYOUSHUIGOUQINGCHUHUOQINGXIXITONGHEWEIQIYUREHUISHOULIYONGXITONG。

凤凰棋牌     WOMENZHIDAO,ZHENGQICHANSHENGYUSHUI。ZHONGXIAOXINGRANQISHIZHENGQIFASHENGQISUOYONGSHUIYUANYIBANWEIPUTONGZILAISHUI。WOGUO1986NIANSHISHIDEYINYONGSHUIGUOJIABIAOZHUNSHIGB 5749-85。BIAOZHUNGUIDINGSHUIZHONGDERONGJIEXINGZONGGUTIWUYINGXIAOYU1000HAOKE/SHENG。YUEWEIMEIQIANKESHUIZHONGRONGJIEXINGZONGGUTIWUYINGXIAOYU1KE。NANFANGDUOWEIDIBIAOSHUI,ZILAISHUIZHONGDERONGJIEXINGZONGGUTIWUYIBANZAI650-850HAOKE/SHENGZHIJIAN,BEIFANGDUOWEIDIXIASHUI,ZILAISHUIZHONGDERONGJIEXINGZONGGUTIWUYIBANZAI700-950HAOKE/SHENGZHIJIAN。YEJISHISHUO,CHANSHENG1QIANKEZHENGQI,NANFANGDIQUJIANGYULIUXIA0.65-0.85KEGUTIWU,BEIFANGDIQUJIANGYULIUXIA0.70-0.95KEGUTIWU。GUTIWUZHONGDEGAIMEILEIGUTIWU(SUCHENGSHUIGOU)YUEZHAN70-80%。LEJIEZHEIXIEZHISHIHOU,WOMENJIUNENGJIAOHAODEBIJIAOZHENGQIFASHENGQIREJIAOHUANJIEGOULEIXINGDEYOUQUEDIAN。

 

     蒸汽发生器热交换结构主要分为水冷壁管道式、翅片管道式、水冷壁容积式和内热容积式四种。

 

     1、水冷壁管道式凤凰棋牌结构就是我们常见的早期家用热水器热交换结构,即是用紫铜片包围成燃烧室,并在紫铜外周螺旋绕并焊接上铜管,下端进水,上端出蒸汽。由于管道总容积小,容水垢能力小,无法设置除水垢结构,因此,该类结构由于需要极其严格的除钙镁离子系统,但仍然不能保证较长的使用寿命,同时其传热效率不高,而费用较高,除早期产品,在市场上已难觅其踪影。

     2、翅片管道式结构凤凰棋牌是水冷壁管道式结构改进形式,是在水冷壁管道式结构顶端加入了多层翅片管道,大大提高了传热效率。由于管道总容积小,从启动到产生蒸汽时间之间的时间可以极短,几秒钟就可以产生所需蒸汽。但这种结构也继承了水冷壁管道式的缺点,即需要极其严格的除钙镁离子系统,但仍然不能保证较长的使用寿命。我们知道高纯度除钙镁离子系统使用费用是高昂的,但除钙镁离子一般是用更为活泼的轻质元素或有机物替代法去除。这种去除法要么会增加水中水溶性非钙镁离子固体物含量,要么就会使蒸汽质量和纯净度产生影响。尽管进行了钙镁离子去除,不说新加入的非钙镁离子固体物,但水中原有的20-30%左右的非钙镁离子固体物仍然不可能去除,仍然会在管道蒸发段上形成沉淀层,经过时间积累将直接影响传热效率,使蒸汽机寿命过早终结。因此,该类产品会偏重宣传其产气时间短的优势,而尽量模糊甚至不提其使用成本和产品寿命问题。

     3、水冷壁容积式凤凰棋牌是将环矩形或环形水箱作为热交换结构,该结构的特点是水容积大,容水垢能力强,可安装排水垢装置。进水只需简单处理,使用寿命长,整体使用费用低。但该结构的热传递效率一般,启动到产气时间较长。因此,该类产品会偏重宣传其使用成本和产品寿命的优势,而尽量模糊甚至不提其产气时间和热效率的问题。

     4、内热容积式是水冷壁容积式的改进形式,其最大特点是将环矩形或环形水箱改进为阵列环矩形,即按照火排数相应设计多个环矩形,并在火焰通过的环矩形空隙中设置若干扰流隔环,达到热交换的最优状态。其传热效率超过翅片管道式结构,但这种结构形式又继承了水冷壁容积式容水垢能力强、可安装排水垢装置、进水只需简单处理、使用寿命长、整体使用费用低的优点,而其从启动到产生蒸汽时间之间的时间比冷壁容积式大大缩短,仅低于翅片管道式。由于其技术的先进性明显,因此,该类产品的宣传比较全面清晰。

凤凰棋牌     ZONGSHANGSUOSHU,CONGJISHUCENGMIANLAIJIANG,CAIYONGNEIRERONGJISHIREJIAOHUANJIEGOU,BINGDAIYOUSHUIGOUQINGCHUYUQINGXIXITONGHEWEIQIYUREHUISHOULIYONGXITONGDEZHONGXIAOXINGRANQISHIZHENGQIFASHENGQI,SHIMUQIANGAILEICHANPINZHONGZHENGTISHIYONGSHOUMINGZUIZHANG、XINGJIABIZUIGAOHEJISHUZUICHENGSHUWANMEIDECHANPIN。GAILEICHANPINJISHUZUIWEICHENGSHUDEDIANXINGDAIBIAOSHIWUHANHONGJIANRENENGKEJIYOUXIANGONGSIDEZHONGXIAOXINGRANQISHIZHENGQIFASHENGQICHANPIN,QICHANPINDENEIRERONGJISHIJIEGOUSHIYUWUHANDAXUEGONGTONGYANFA,CAIYONGQUANSHUZIHUALIUTAIFENXIJISHUYOUHUADEJIEGUO,YONGYOUDUOGEZIZHUZHISHICHANQUANDEGUOJIAZHUANLI。

 

武汉大学动力与机械学院

博士导师、教授:程志毅

 
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