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An online environmental monitoring system and online monitoring method for fluorine chemical industry

A monitoring system and environment technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of unintuitive, unfavorable human protection, low degree of automation, etc., achieve good reproducibility and accuracy, avoid direct contact, good reproducibility

Active Publication Date: 2019-01-22
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Manual on-site sampling and then analysis by gas chromatography. The disadvantages of this method are: labor-intensive, on-site sampling is necessary, and people have to directly contact the site, which is not conducive to the protection of people, and the degree of automation is low
[0005] 2. Raise mice on site. The disadvantage of this method is that a special person is required to be responsible for raising the mice. It is greatly affected by external factors such as individual differences in the mice, on-site wind direction, and environmental temperature and humidity. It is not intuitive and cannot accurately judge the type of leakage and Quantity, even unnecessary panic caused by misjudgment

Method used

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  • An online environmental monitoring system and online monitoring method for fluorine chemical industry
  • An online environmental monitoring system and online monitoring method for fluorine chemical industry
  • An online environmental monitoring system and online monitoring method for fluorine chemical industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Environmental online monitoring system for the fluorine chemical industry

[0036] The environmental online monitoring system of the fluorine chemical industry in this embodiment includes a sample collection unit, a multi-channel comprehensive analysis unit and a data collection control center, the sample collection unit is connected to the multi-channel comprehensive analysis unit through pipelines, and the multi-channel comprehensive analysis unit Connect to the data acquisition control center;

[0037] The online collection system includes a collection port, a bundle tube, and a multi-channel switching valve, the collection port is connected to the bundle tube, and a multi-channel switching valve is set on the pipeline formed by the bundle tube;

[0038] The multi-channel comprehensive analysis unit includes an adjustable distributor 5 electronic flowmeter 2, a silent oil-free diaphragm pump 3 and a gas chromatography-mass spectrometer, see figure 1 , is ...

Embodiment 2

[0043]In this example, a comparison is made with the mainstream material bundle tubes currently available on the market (the deactivated copper tubes are purchased from Agilent), and the results are listed in Table 1. The other components of the online monitoring device used are as described in Example 1, and the standard gas used is chlorodifluoromethane with a content of 5 ppb diluted with nitrogen.

[0044] Table 1 Main tube material

[0045]

J1

J2

J3

J4

Tube material

polyethylene

PTFE

Fusible tetrafluororesin

Deactivated copper tube

Tube length

160 meters

160 meters

160 meters

160 meters

[0046] According to the order of J1 to J5, cycle test 5 times, the results are as follows:

[0047] Table 2: Standard gas detection reproducibility

[0048]

[0049] From the experimental data in this embodiment, it can be known that the fluorine-containing resin bundle tube of polytetrafluoroethylene and fusibl...

Embodiment 3

[0051] In this embodiment, an experiment is carried out on the importance of the polytetrafluoroethylene biaxially stretched gas permeable membrane treated with oil-repellent technology at the collection port as the filter membrane. The present embodiment has carried out two experiments: experiment pair three kinds of filter modes are compared, and adopt the system of embodiment 1 to the standard gas that the content of nitrogen dilution is 10ppb to carry out five repeated monitoring experiments, filter mode is as table 3, The experimental data are shown in Table 4; Experiment 2: The three filtering methods were monitored for three consecutive months in a machine room with heavy oil and gas, and the experimental results are shown in Table 5.

[0052] Table 3: List of filtering methods

[0053]

[0054] Table 4: Standard gas detection reproducibility

[0055]

[0056]

[0057] Table 5: List of on-site monitoring results

[0058]

[0059] From the experimental data...

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Abstract

The invention provides an online environment monitoring system in a fluorine chemical industry. The system comprises a sample collection unit, a multi-channel comprehensive analysis unit and a data acquisition control center, wherein the sample collection unit is connected with the multi-channel comprehensive analysis unit through a pipeline; and the multi-channel comprehensive analysis unit is connected with the data acquisition control center. An online collection system comprises a collection port, bundle tubes and a multi-channel switching valve, wherein the multi-channel switching valve is arranged on a pipeline composed of the bundle tubes; and the multi-channel comprehensive analysis unit comprises an adjustable distributor electronic flow controller, an air pump and gas chromatography-mass spectrometric equipment. The monitoring system and the monitoring method disclosed by the invention overcome the defects in the prior art such as large labor amount, high dangerousness, inaccurate animal monitoring and the like, can be applied to online monitoring of fluorine chemical industry production sites, fluorine chemical industry raw product storage areas and the like, avoid direct contact between personnel and toxic substances, can intuitively reflect the varieties and contents of leaking substances and have excellent reproducibility and accuracy.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and in particular relates to a system for monitoring organic fluorine, chlorine and sulfur gases and its application. Background technique [0002] my country's fluorine chemical industry began in the late 1950s, and has made great progress after more than 50 years of development. Fluorine chemical industry involves a wide range of fields and a long process flow. The starting point is to refine fluorite into hydrogen fluoride, and then use hydrogen fluoride as raw material to divide into four directions: ODS (ozone depleting substances) substitutes (that is, refrigerants), fluoropolymers ( polyvinylidene fluoride, fluorine rubber, polytetrafluoroethylene, etc.), fluorine-containing fine chemicals and fluoride salts. The overall characteristics of the fluorine chemical industry are: complex process, high degree of difficulty, high corrosiveness, high risk in the reaction process, intermedi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/8804
Inventor 蔡醇洋张建新李慧
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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