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谈谈如何操作小蒸汽锅炉的排污工作
发起人:dajiangjunwang  回复数:1  浏览数:4539  最后更新:2012/2/9 8:46:21 by asasd6

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2011/6/1 8:31:10
dajiangjunwang





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谈谈如何操作小蒸汽锅炉的排污工作
对小蒸汽锅炉进行排污的话,它的安全排污操作工作需要注意以下几方面的内容:
(1)泥鼓和水冷壁的定期排污,宜在炉水中的沉淀物容易下沉的低負荷時進行。在燃煤蒸汽锅炉正常負荷下,允許泥水鼓經直徑50亳来或更小的排污门进行排污,而水冷壁下联鼓径直徑25亳来(應根据現場具設备的情况予以規定)的排污門進行排污。
(2)开始对小蒸汽锅炉排污前,必須檢查排污門的情况(每处應裝兩个串聯排污門)。如情況正常,才可排污。進行定期排污时,最好調整炉內的水位,使水位稍高以后再进行排污。
(3)在排污前,还必須查明檢修中的蒸汽锅炉已经和排污管道系統隔絕。
(4)如果二台小蒸汽锅炉使用同一个排污总管的话,而排污管上又無逆止门的時候,則禁止这两台锅炉同时進行排污。
(5)安裝排污設备的地点,以及通向該处的通道,均应有量够的照明,否則不允許進行排污。
(6)排污門若具有难于修理的缺陷,如門桿彎曲、截门卡紧及漏洩严重,則不容許再利用其进行排污。但有小缺陷時,如法蘭盘根漏水等,可以在小蒸汽锅炉运行時修理。
(7)禁止利出任何槓桿來延長手輪直徑以开啟排污门。
(8)排污的程序如下:首先完全开启第二个排污门(从离开小蒸汽锅炉算起)。然后微开第一个排污門,以便預熱排污管这系统。在管这系統预熱完畢后,再緩慢地开大第一个排污門。这时排污管系統內必須無冲击声。如發現有沖击声時,应將第一个排污門关小,直至冲击声消失为止,然后再緩慢地开启。
(9)排污完毕,必須首先关閉第一全排污門,再关閉第二个排污门(都从离开小蒸汽锅炉算起)。根据排污管內的声音,确定排污是否已停止。排污門关閉若干时間后,應用手測試排污管的溫度,以檢查排污門关閉的严密性。
(10)排污门的开度和排污時問的長短,應由化學試驗室規定。允其是水冷壁下聯箱排污时間的長短,更應严格限制(根据小蒸汽锅炉具体情況規定),以免破环水冷壁內的水循环。
(11)定期排污时,每排污点排污时間不得超过0,5~1.0分鐘。排污时,第一排污截門應全部开启,应避免截門局部开件而延長排污時間的排污方式。
(12)当进行排污时,座特別密切注意炉內水位。如有任何不正常情况,應立即停止排污。
(13)如在进行定期排污時,發电在厂內發生事故,则應立即停止排污。但如該炉水位是高時,則屬例外。
(14)在即將停炉前进行排污是很有效的。
(15)对小蒸汽锅炉高壓爐来說,为了避免在锅炉运行中循环的中断,可以允许它在高負荷時定期排污工作,但是每一点应该不超过0.5分钟,还有在小蒸汽锅炉排污时截门应该全开或者全关。

2012/2/9 8:38:54
asasd6





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