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【精选工艺安全课件】——安全阀、爆破片的使用与管理

  • 2026-06-14 22:18:38
【精选工艺安全课件】——安全阀、爆破片的使用与管理
实用的化工工艺计算表合集-按专业分类(2023~2026年)
关于安全阀和爆破片的设定压力、泄放量、泄放面积,管道背压的计算,本公众号发布了很多篇实用的文章,如需了解更多信息可点击计算表合集。
安全阀&爆破片&呼吸阀泄放量/泄放面积计算表

01 安全阀的使用与管理

1.1 安全阀分类和结构特点

弹簧式安全阀

杠杆重锤式安全阀

先导式安全阀

全启式、微启式安全阀结构特点

1.2 安全阀密封面、阀体、弹簧材料的选择

1.3 安全阀的应用范围

安全阀选型不当可能带来的风险

1.4 安全阀形式的选择

1.5 安全阀应用范围

1.6 安全阀安装要求

1.7 安全阀校验周期

1.8 弹簧式安全阀工作过程

1.9 弹簧式安全阀起跳曲线

1.10 容器安全阀整定压力遵循的原则

1.11 安全阀使用中常见的问题

1.12 安全阀定期检查内容

02 爆破片的使用与管理

2.1 爆破片型式及使用特点

2.1.1 爆破片分类

2.1.2 爆破片代号及命名

2.1.3 爆破片使用特点正拱形爆破片
      凹面处于高压侧,动作原理为超压时膜片产生塑性变形,压力到达设定值拉伸破裂泄压。常用一种型号为正拱开缝型(LF)爆破片,通过开缝后的桥长控制压力,可用于低压大口径泄 放工况,在负压或者背压情况下,要注意防止膜片反转失稳破裂。

反拱形爆破片
      凸面处于高压侧,工作原理为超压时膜片受力反转失稳或剪切而破裂泄压。如反拱鳄齿型(YE)爆破 片压力到达设定值时膜片发生反转失稳,环形鳄齿破裂泄压。应注意的是此型号的爆破片对安装要求较高, 使用时务必和夹持器配套使用,以防止膜片反转失稳后环形鳄齿无法致破的情况发生。

平板型爆破片
      膜片呈平板形,系统超压或者压力到达一定值时膜片拉伸或剪切破裂泄压。此形式的爆破片标准 结构一般不耐负压,其中平板开缝型为三层复合型结构,如确有背压产生可将进口的金属换成非常规 的带+字型托架结构。

石墨爆破片
      最大工作压力不能超过最小爆破压力的0.8倍;爆破有碎片,耐疲劳性较差;具有良好耐各种介质腐蚀性,但不能用于强氧化性酸;适用于气、液相。

2.2 爆破片选用与安装

a.爆破片选用注意事项

(1) 压力 a.压力较高时,爆破片宜选择正拱型;b.压力较低时,爆破片宜选用开缝型或反拱型;c.系统有可能出现真空或爆破片可能承受背压时,要配置背压托架;d.有循环压力或脉冲压力则选用反拱型。
(2) 温度 高温对金属材料和密封膜的影响。
(3) 使用场合 a.在安全阀前使用,爆破片爆破后不能有碎片;b.用于液体介质,不能选用反拱型爆破片。

b. 爆破片的选用与安装

c. 爆破片主要术语

爆破压力
      爆破片装置在相应的爆破温度下动作时,爆破片两侧的压力差值 设计爆破压力 爆破片设计时由需方提出的对应于爆破温度下的爆破压力。
最高压力
      容器最大工作压力加上流程中工艺工作系统附加条件后,容器顶部可能达到的压力。
制造范围

      为方便爆破片制造,设计爆破压力在制造时允许变动的压力范围。此种允许变动的压力范围须 由供需双方协商确定。

2.3 爆破片相关的压力关系图

2.4 爆破片与容器相关的压力关系表

2.5 爆破片安装

爆破片安装注意事项

2.6 爆破片日常维护管理

2.7 爆破片装置使用中常见的问题

2.8 爆破片装置定期检查

2.9 爆破片定期更换

3 安全阀与爆破片安全装置组合的使用与管理

3.1 安全阀与爆破片串联

3.2 安全阀与爆破片并联

3.3 安全阀与爆破片组合装置的检查

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END

    本文部分内容来自“中国化学品安全协会”官网 “化危为安”线上讲堂第85期 | 安全阀、爆破片的使用与管理

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  1. CONNECT:[ UseTime:0.001036s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001260s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.015074s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003339s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001309s ]
  6. SELECT * FROM `set` [ RunTime:0.009638s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001445s ]
  8. SELECT * FROM `article` WHERE `id` = 508966 LIMIT 1 [ RunTime:0.004093s ]
  9. UPDATE `article` SET `lasttime` = 1781886696 WHERE `id` = 508966 [ RunTime:0.037626s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000624s ]
  11. SELECT * FROM `article` WHERE `id` < 508966 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001121s ]
  12. SELECT * FROM `article` WHERE `id` > 508966 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006029s ]
  13. SELECT * FROM `article` WHERE `id` < 508966 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001391s ]
  14. SELECT * FROM `article` WHERE `id` < 508966 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001616s ]
  15. SELECT * FROM `article` WHERE `id` < 508966 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.012914s ]
0.262049s