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Freon gas detection warning device and detection method thereof

A gas detection alarm and freon technology, applied in the field of analysis and detection, can solve the problems of bulky gas chromatography instruments, not suitable for portable detection, and unsatisfactory results, and achieve the effects of ensuring reproducibility, improving instrument stability, and reasonable design

Inactive Publication Date: 2014-05-21
NAVY MEDICINE RES INST OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, domestic Freon monitoring equipment such as refrigerant leak detectors generally use semiconductors as probes to analyze the total Freon, which cannot be qualitative; in some environments where multiple Freon (such as refrigerants, fire extinguishing agents) are used The instrument cannot report the leakage of freon in real time, and subsequent investigation procedures are required one by one, which is time-consuming and labor-intensive; most foreign freon monitoring adopts gas chromatography or gas chromatography-electron capture detection (GC-ECD) method, and gas chromatography instruments are bulky and expensive Expensive and not suitable for portable detection. At the same time, in gas chromatography analysis, capillary columns and porous silica gel-packed columns are often used for chromatographic columns. However, due to the wide variety of Freon in general detection of atmospheric samples, the chromatographic column products on the market are not suitable for separation in a short period of time. The detection results of F-1301, F-12 and F-11 are not satisfactory

Method used

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  • Freon gas detection warning device and detection method thereof
  • Freon gas detection warning device and detection method thereof
  • Freon gas detection warning device and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation of embodiment 1 freon chromatographic column

[0021] The specific implementation of the production process of the chromatographic column

[0022] (1) Material: stainless steel tube (outer diameter Wall thickness 0.5mm), DG-2 (80-100 mesh), ApiezonL (Apiezon-L), acetone

[0023] (2) Manufacture of chromatographic column body: cut off the outer diameter A stainless steel tube with a wall thickness of 0.5mm and a length of 1600mm, with a flat and neat fracture, no burrs, no closing or flaring, and the tube material is wound into a spiral chromatographic column.

[0024] (3) Cleaning: Soak the chromatographic column body in a mixture of industrial detergent and pure water, clean it with an ultrasonic cleaner for about half an hour, then clean it with an ultrasonic cleaner for 40 minutes, rinse it with pure water, and then put it into the Oven dry. Use compressed air to blow out impurities in the pipe wall.

[0025] (4) Chromatographic filler treatm...

Embodiment 2

[0032] Example 2 Separation Verification Test of Freon Chromatographic Column

[0033] Analysis conditions: ECD detector, column temperature 70°C, carrier gas is high-purity nitrogen, column front pressure is 0.2MPa;

[0034] Standard gas: F-1301 (24ppm), F-12 (52ppm), F-11 (25ppm) mixed standard;

[0035] Turn on the power of the instrument, adjust the front pressure of the high-purity nitrogen column to 0.2MPa, set the column temperature to 70°C, keep the column temperature constant for 2 hours, and then enter the standard gas for analysis.

[0036] seperate effect:

[0037] signal peak F-1301 F-12 F-11 Peak time (s) 73 95 232 Peak area 1016 351 284 2115

[0038] The column prepared in embodiment 1 and the commercially available column check the standard gas, and the results are as follows:

[0039]

[0040]

Embodiment 3

[0041] Embodiment 3 Freon gas detection alarm device

[0042]A Freon gas detection and alarm device, 320mm×410mm×220 (L×H×W), which includes a detection and analysis system, a gas circuit system, a control system and a power supply system, the detection and analysis system, the gas circuit system, and the control system are connected to each other, and the power supply The system supplies power to all three; ( figure 1 )

[0043] 3.1 Gas system design

[0044] The gas circuit system is divided into two routes, one is sample gas, and the other is carrier gas (high-purity nitrogen), mainly composed of sampling pump, tee, sample air resistance, nitrogen air resistance, pressure controller, ten-way valve, etc. composition. For the flow chart of the air system, see figure 2 .

[0045] A. The sample gas enters the three-way block from the air pump, and enters the halogen sensor through the air resistance, solenoid valve and dehydrogenation tube all the way. The response of the...

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Abstract

The invention belongs to the technical field of analysis and detection, and particularly relates to a Freon gas detection warning device. The invention discloses the Freon gas detection warning device which comprises a detection and analysis system, a gas path system, a control system and a power supply system, wherein the detection and analysis system, the gas path system and the control system are connected with one another, and the power supply system is used for supplying power to the detection and analysis system, the gas path system and the control system. The Freon gas detection warning device disclosed by the invention has the characteristics of good separation effect, accuracy in measurement, high interference resistance, good repeatability and the like, and can be used for qualitative analysis as well as quantitative analysis of F1301, F-11, F-12 and F22; the adopted technical principle is advanced; the Freon gas detection warning device is reasonable in design, convenient to use and maintain, and high in standardization level and universalization level.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a freon gas detection and alarm device and a detection method thereof. Background technique [0002] Freons, also known as chlorofluorocarbons (CFCs), are several fluorochloromethanes and fluorochloroethanes that are entirely produced by humans, the most common being monofluorotrichloromethane (F-11), difluorodichloromethane (F-12), Trifluorotrichloroethane (F-113), Bromotrifluoromethane (F-1301). Freon is a gas or a volatile liquid at room temperature. It has stable chemical properties, is non-flammable and has extremely low toxicity. It is widely used in refrigerants, fire extinguishing agents, cleaning agents and aerosol propellants. Freon is quite stable after being discharged into the atmosphere, and hardly degrades in the troposphere, so that their concentration in the troposphere atmosphere rises sharply. Freon is a chemically inert gas in the ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/60
Inventor 潘沪湘肖存杰张建陈茜鲁毅钧许林军徐新宏燕锐袁海霞江璐
Owner NAVY MEDICINE RES INST OF PLA
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