密闭空间内有机化学品挥发动力学在线检测系统

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密闭空间内有机化学品挥发动力学在线检测系统

更新时间：2025-07-09

- 密闭空间内有机化学品挥发动力学在线检测系统
- Issue 12, Pages: 177-182(2019)
- 作者机构：
  
  1. 大亚湾核电运营管理有限责任公司中长期改造项目部
  2. 中广核研究院有限公司系统工程与改造中心
  3. 西安交通大学环境科学与工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM623
- Published：2019
- 稿件说明：
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[J]. 2019, (12): 177-182.
DOI：

[J]. 2019, (12): 177-182. DOI：

摘要

针对核电安全壳检修实验期间难以动态定量测定多种挥发性有机化学品、进而难以评估其火灾风险的问题

构建了一种密闭空间内有机化学品挥发动力学在线检测系统。采用密封腔体为化学品挥发腔、以气相色谱仪为气相中有机化学品浓度的在线检测仪、以气体循环泵为系统内气体循环的驱动单元、以质量流量计为气体循环流速的精确控制器来提供化学品挥发所需的气相对流条件;通过在线的自动六通阀采集密封腔体内的气体样品并实现对气相色谱仪进行自动进样

实现了气相中有机物浓度的在线定量测定;整个样品挥发和循环管路系统置于恒温箱内

可实现温度和气压的可调控制。测定了正丁醇和乙苯的挥发动力学特性及平衡蒸气压

并将平衡蒸气压与理论值进行对比

结果表明:在20～30℃的范围内

气相中的正丁醇和乙苯挥发曲线遵循准一级挥发动力学方程

且所测得的平衡蒸气压与理论值相近。该测试系统稳定性好、测试结果准确度较高

利用该系统测定的化学品挥发速率值可用于计算评估核电安全壳内挥发性化学品在打压期间的累积情况

进而评估其火灾风险。

Abstract

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references

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