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锅炉培训课件(FSSS系统).ppt

  • 2026-06-01 09:11:03
锅炉培训课件(FSSS系统).ppt
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什么是FSSS

是锅炉燃烧器的自动顺序控制系统。

是锅炉的自动保护系统。

是协调控制系统炉侧的一个子自动控制系统。

是一个逻辑控制系统。

FSSS逻辑控制系统结构

公用逻辑:油系统泄漏试验、炉膛吹扫、锅炉点火允许条件的判断、OFT、MFT、二次风门挡板的控制、燃油跳闸阀控制、再循环阀控制。

油层逻辑:油枪点火允许条件、油枪的启动、停止、吹扫、跳闸。

煤层逻辑:煤层点火允许条件、制粉系统的启动、停止、跳闸。

五、炉膛爆燃的原因

(一)爆燃必须满足的三个条件:

1、炉膛里堆积有大量的燃料和空气的混合物。

2、混合物的比例在可燃的范围内。

3、有足够的点火能量。

炉膛内最可能发生可燃混合物积存的几种危险情况

1、燃料、空气或点火能量中断,造成炉膛内瞬时失去火焰时,可燃物堆积,如接着点火或火焰恢复时,就有可能引起爆燃。

2、在多个燃烧器正常运行时,一个或几个突然失去火焰,也会堆积可燃混合物。

3、整个炉膛灭火,造成燃料和空气可燃混合物聚集,在再次点火或者有其他点火源存在时,这些可燃混合物就会爆炸。

4、在停炉检修期间,由于燃料关断设备失控或泄漏,燃料漏入炉膛,在遇到火源时也会造成爆燃。

5、炉膛顶部大量结焦,大片焦的下落冲击火焰中心,造成火焰熄灭或燃烧混乱。结焦物在冷灰池内与炉底水封产生反应,生成大量水蒸气和水煤气,也会造成爆燃。

6、由于煤种多变,所以风量不能适应,造成燃烧器灭火。

防止炉膛爆燃的原则性措施

1、在主燃料与空气混合物入口处要有足够的点火能源,点火器的火焰要稳定,具有一定的能量而且位置要恰当,能把主燃料点燃。

2、当有未点燃的燃料进入炉膛时,未点火时间应尽可能缩短,使积存的可燃物容积占炉膛容积的极小部分。

3、对于已进入炉膛的可燃物应尽快地冲淡,使之浓度不在可燃范围,并不断地把它吹扫出去。

4、当进入的燃料只有部分燃烧时,应继续冲淡,使之成为不可燃混合物。

5、注意燃料品种变化,及时调整风速和风煤比例,对于四角喷燃锅炉,应保持燃烧中心的稳定和各角火焰的稳定。

在点火、暖炉期间防止爆燃的措施

1、点火前,吹扫炉膛和烟道,换气量大于等于炉膛容积的四倍,空气流量为25—40%额定负荷空气量,吹扫时间最少为五分钟。

2、在此期间送的燃料量不大于10%额定负荷的燃料量。

3、在点火和暖炉期间,要求燃烧器要少,要集中使用,但在此同时应考虑炉膛加热的均匀,燃烧器要求对称。

4、要尽量缩短主燃烧器点火时间,若超时时,应果断切断燃料,再次吹扫,重新点火。

5、严禁利用所谓的“余热”再点火。

6、在点火初期要保证一定的混合物浓度及流量,而且流量应由小到大逐渐增大,以保证炉膛压力稳定。(炉膛压力不稳,说明存在小的局部燃烧。)

燃油回油速断阀及油角阀泄漏试验

最初状态, 燃油供油速断阀, 燃油回油速断阀均应为关闭状态.

打开燃油供油速断阀充油,油压建立后,关闭燃油供油速断阀.一定时间后,监视阀后压力.如果在90秒内母管压力一直保持高,则泄漏试验成功,否则泄漏试验失败。

燃油供油速断阀泄漏试验 

打开燃油回油速断阀(同时打开燃油供油调节阀,并一直处于开位),8秒后关闭.然后FSSS监视油母管压力,如果在90秒内母管压力一直低,则燃油供油速断阀没有泄漏;如果母管压力高,则表明油母管燃油供油速断阀有泄漏,泄漏试验失败 。 

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  1. CONNECT:[ UseTime:0.000978s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001802s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000724s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000682s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001539s ]
  6. SELECT * FROM `set` [ RunTime:0.000552s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001677s ]
  8. SELECT * FROM `article` WHERE `id` = 525074 LIMIT 1 [ RunTime:0.001996s ]
  9. UPDATE `article` SET `lasttime` = 1780282642 WHERE `id` = 525074 [ RunTime:0.003370s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000740s ]
  11. SELECT * FROM `article` WHERE `id` < 525074 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001280s ]
  12. SELECT * FROM `article` WHERE `id` > 525074 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001061s ]
  13. SELECT * FROM `article` WHERE `id` < 525074 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001898s ]
  14. SELECT * FROM `article` WHERE `id` < 525074 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004029s ]
  15. SELECT * FROM `article` WHERE `id` < 525074 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004964s ]
0.115702s