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高压主汽门执行机构PPT

  • 2026-03-31 06:43:57
高压主汽门执行机构PPT

两篇

润滑油温过高过低对汽机有什么影响

1油温过高会降低润滑油的黏度,破坏油膜的承载能力,导致轴瓦磨损甚至烧瓦;

2油温过低则会使润滑油黏度增大,流动阻力增加,轴瓦油膜过厚,可能引发油膜振荡

给水泵汽化的原因
1.除氧器压力异常
2.流量过低或再循环未开启
3.入口滤网堵塞
4.除氧器水位过低
5.泵长时间超负荷运行


凝泵运行中打不上水的原因

1、误操作(凝结水泵入口或出口误关)
2、凝结水泵入口滤网堵塞,漏空气
3、凝汽器热水井水位低
4、凝结水流量低,再循环门未开

1、凝结水泵入口滤网脏或堵塞

2、凝汽器热井水位过低
3、凝结泵入口流量少或流量不稳定
4、凝结泵出现故障,不打水,打闷泵
5、误操作造成凝结水泵入口或出口关闭(再循环未开)
6、真空异常下降,排气温度升高,凝结水温度异常升高"

零起升压,投入“假并网试验”按钮,机组并网后使用转速控制加负荷操作步骤

1、确认机组转速3000rpm/min,电气人员回复机组已并网,可以升负荷;

2、打开DEH画面总图中控制设定点,设定升速率10;高调门未全开,设定目的转速3070rpm/min,点击“进行”,调门开大,负荷上升;3

负荷升至目标负荷,点击“保持

1凝结水系统启动

2检查凝结水系统检修结束,工作票终结,压力表、温度表完善,保温恢复;

3凝结水系统电动门、调整门送电,阀门传动试验合格,A、B凝结水系统静态联锁试验合格;

4联系电气确认A、B凝泵电动机绝缘合格,送上电源;

5关闭凝汽器底部汽侧放水手动门,关闭A、B入口滤网底部放水门及出口母管放水门;

6检查凝结水系统#4低加出口电动门前启动放水手动门、电动门关闭;

7检查凝结水至各用户手动门/电动门关闭;

8检查冷渣器进回水手动总门关闭;

9检查凝结水系统轴加、#4、#5、#6低加进出水手动门开启,旁路手动门关闭;

10开凝汽器补水调整门,凝汽器补水至700-800mm;(机组停运大于7天,对凝汽器进行补水冲洗1次)

11检查A、B凝结水泵入口手动门开启,出口电动门关

12检查A、B凝结水泵轴承冷却水、密封水进出水手动门全开;

13检查A、B凝结水泵抽空气门开启;

14检查除盐水压力 Mpa(≥0.4Mpa);

15检查凝结水再循环调整门开启30%以上,除氧器上水调整门全关;

16查询凝结水泵上一周期运行情况:启动电流 A,运行电流 A,电机轴承温度 、 ℃;

17启动凝结水泵,启动电流 A,运行电流 A(标准:电流≤30.4A),出口压力 MPa,凝结水泵振动 μm,电机轴承温度 、 ℃;

18检查凝泵出口电动门联开正常,并调整凝结水压力在1.5-1.8MPa;

19开启凝泵出口电动门,投入 凝结水泵联锁;(若出口电动门开启过程中凝结水泵倒转,立即关闭该凝结水泵出口电动门)

20凝结水系统启动操作完毕。

1 A凝泵切换至B凝泵;
2 检查B凝泵具备启动条件,密封水、轴承冷却水进出水门全开,凝泵抽空气门开启3圈
3 查询B凝泵上一周期运行情况:运行电流 A,电机轴承温度 、 ℃;
4关闭B凝泵出口电动门,退出B凝泵联锁;
5 开启凝结水系统再循环电动门,降低凝结水压力至1.4-1.6Mpa且运行凝结水泵电流不超30.4A;
6 启动B凝结水泵运行,出口电动门联开正常;
7 调整凝结水系统再循环电动门,保持凝结水压力在1.6—1.8Mpa;
8 检查B凝结水泵电流 A,母管压力 Mpa;
9 检查B凝结水泵密封水、轴承冷却水进回水门开启正常;
10 关闭A凝结水泵出口电动门;
11 调整凝结水系统再循环电动门,保持凝结水压力在1.6—1.8Mpa,全关再循环电动门;
12 停止A凝结水泵运行;
13 检查凝汽器水位 mm,B凝结水泵电流 A,凝结水压力 Mpa;
14 检查A凝泵转子静止,投入A凝结水泵联锁,A凝结水泵出口电动门联开;(若出口电动门开启过程中凝结水泵倒转,立即关闭该凝结水泵出口电动门)
15 A凝泵切换至B凝泵操作完毕。

凝结水用户

1,低压汽封减温水
2,给水泵机械密封水
3,乏汽回收冷却水
4,高加联成阀控制水
5,低压缸喷淋
6,轴加多级水封,给水泵回水多级水封注水
7,疏水扩容器减温水
8,真空泵汽水分离器补水
9凝结水泵自密封水
10、低旁减温水
11、三级减温水

“低级的欲望通过放纵即可获得,高级的欲望却需要克制才能达成。”

期凝结水用户

1.给水泵机械密封水冷却水
2.真空泵前置冷却器工作水,
3.低旁减温水
4.低压疏扩减温水
5.高压疏扩减温水
6.辅联至汽封供汽减温水
7.低压缸喷水
8.真空破坏门水封
9.低压轴封减温水
10.锅炉冷渣器用水
11.锅炉低省循环水
12.三级减温水
13.轴加水封筒
14.6号低加水封筒

盘车启动允许条件及跳闸条件?

"启动允许条件(以下条件全部满足):

1、顶轴油压正常

2、汽机盘车无事故跳闸信号

3、盘车装置齿轮齿合到位

4、润滑油压≥0.035MPa

5、汽机零转速

跳闸条件:

1、转速<4.5rpm

2、润滑油压<0.03MPa

高压加热器安装注水门的原因

(1)便于检查水侧是否泄漏;
(2)便于打开进水联成阀;
(3)为了预热钢管,减少热冲击。

①启动时控制升温升压速率,避免转子和汽缸膨胀不均;

②调整轴封供汽温度,匹配汽缸温度(热态启动时用高温轴封汽,冷态启动时用低温轴封汽);

③控制汽轮机负荷变化速率,避免负荷骤升骤降;

④保持润滑油温、汽缸冷却水温度稳定,减少汽缸变形。

抗燃油箱油位下降的原因

1,EH油系统管路、接头及其附件漏油(包括但不限于以下原因:EH油冷油器漏油、油箱底部取样门误开、高压油管法兰接头漏油、油动机伺服阀的密封圈漏油、油泵机械密封处漏油等)
2、EH油温下降
3,蓄能器气囊破裂,气囊漏气
4、EH油位测点显示不正确

给水泵汽化的原因?


1.除氧器压力异常
2.流量过低或再循环未开启
3.入口滤网堵塞
4.除氧器水位过低
5.泵长时间超负荷运行

DCS操作原则:

1、操作前清楚操作任务及操作过程中的危险点和预控措施。
2、严格遵守操作票制度,执行一人监护一人操作,唱票复诵制度,不跳项,不漏项。
3、操作中遇到疑问应询问清楚后再继续操作。
4、操作时与就地人员时刻保持信息畅通。

5、操作前核对设备双重名称。
6、操作前后严密监视设备参数变化及报警信息。
7、需要多岗位协作完成的操作任务,要明确各自的职责和操作顺序,确保操作协调一致。
8、操作完毕后准确记录数据。



1.除氧器压力异常
2.流量过低或再循环未开启
3.入口滤网堵塞
4.除氧器水位过低
5.泵长时间超负荷运行


高加泄露预防措施

1、加减负荷率控制在2MW/min,防止负荷大幅度变化导致漏点增大。

2、进行抽汽逆止门进行活动试验,确定高加抽汽逆止门活动正常无卡涩。
3、
高加危急疏水手动门保持全开禁止将危急疏水气动门打禁操。
4、监视#2高加液位和#2高加正常疏水调整门开度关系,现状:
1)100MW负荷,#2高加正常疏水调整门46-47%可维持#2高加液位在350-400mm:2)

120MW负荷,#2高加正常疏水调整门51-52%可维持#2高加液位在350-400mm:3)2高加正常疏水调整门开度每增加1%,必须汇报值长、专业。
5、#2高加正常疏水调整门开至60%,汇报值长、专业,申请退出化2机组高加。
6、运行中发现#2高加液位无法维持在350-400mm,2高加正常疏水调整门开度已大于70%或#2高加液位高Ⅱ值危急疏水气动门开启,立即解列#1、#2高加(汽侧、水侧全部解列),以10MW/m1n的速率降负荷至100MW,通知告知锅炉专业解列高加,调整燃烧,汇报值长。

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  1. CONNECT:[ UseTime:0.000437s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000561s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000252s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000275s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000520s ]
  6. SELECT * FROM `set` [ RunTime:0.000235s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000525s ]
  8. SELECT * FROM `article` WHERE `id` = 473015 LIMIT 1 [ RunTime:0.000538s ]
  9. UPDATE `article` SET `lasttime` = 1775437455 WHERE `id` = 473015 [ RunTime:0.000490s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000278s ]
  11. SELECT * FROM `article` WHERE `id` < 473015 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000414s ]
  12. SELECT * FROM `article` WHERE `id` > 473015 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003897s ]
  13. SELECT * FROM `article` WHERE `id` < 473015 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.008682s ]
  14. SELECT * FROM `article` WHERE `id` < 473015 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003074s ]
  15. SELECT * FROM `article` WHERE `id` < 473015 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.020367s ]
0.110812s