Explosion-proof FID

An explosion-proof, cylindrical component technology, applied in the field of FID, can solve the problems of low signal-to-noise ratio of FID, water accumulation inside the online instrument, damage to the signal board, etc., and achieve safe and reliable structure, high signal-to-noise ratio and low detection limit Effect

Pending Publication Date: 2021-05-28
HANGZHOU PUYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The FID has a low signal-to-noise ratio and a detection limit. It is applied to an online instrument. The repeatability, stability, response factor and other parameters of the instrument do not meet the standard requirements.
[0006] 2. The skin of the ignition wire wire is melted and damaged due to excessive local temperature, resulting in a short circuit, resulting in irreversible damage
[0007] 3. The temperature at the position of the ignition wire is too high, causing the ignition wire to be blown
[0008] 4. If the inside of the detector is used for online instruments for a long time, there will be internal water accumulation, resulting in short circuit, signal board damage, etc.

Method used

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  • Explosion-proof FID

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 A schematic structural diagram of the explosion-proof FID of the embodiment of the present invention is given, as figure 1 As shown, the explosion-proof FID includes:

[0026] The first cylindrical part 20, and the ignition wire 7, the collecting pole 28 and the polarizing pole 14 arranged in the first cylindrical part 20 are prior art in this field;

[0027] The second cylindrical part, the second cylindrical part is arranged inside the first cylindrical part 20, and is respectively connected with the upstream part and the downstream part, and isolates the inside of the first cylindrical part 20 as the first cylindrical part. The part inside the second cylindrical part, and the interlayer part between the second cylindrical part and the first cylindrical part;

[0028] a nozzle 31, the nozzle 31 is arranged in the second cylindrical part, and is used for transmitting sample gas;

[0029] The polarized pole 14, the collecting pole 28 and the ignition wire 7 ...

Embodiment 2

[0062] An application example of the explosion-proof FID according to Embodiment 1 of the present invention.

[0063] In this application example, if figure 1 As shown, the explosion-proof FID includes:

[0064] a first cylindrical member 20 having a larger inner diameter portion and a smaller inner diameter portion;

[0065] The upstream part includes a first end cover 21, a pipe fixing part 18, a bracket 34, a gas mixing part 17 and an adapter 16 arranged sequentially from outside to inside: the gas mixing part 17 is arranged on the first cylindrical part 20 The inner side of the larger part of the inner diameter has a gas passage arranged along the central axis of the gas mixing part. One end of the first gas pipe 43 is inserted into the gas passage and extends to the outside of the first cylindrical part 20; the nozzle 31 is inserted into the The gas channel passes through the air nozzle 32 and the adapter 16; the air nozzle 32 is arranged in the gas mixing part 17; the ...

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Abstract

The invention provides an explosion-proof FID. The explosion-proof FID comprises a first cylindrical part, and an ignition wire, a collector and a polarization electrode which are arranged in the first cylindrical part. A second cylindrical part is arranged on the inner side of the first cylindrical part and connected with an upstream part and a downstream part respectively, and the interior of the first cylindrical part is separated into a portion on the inner side of the second cylindrical part and an interlayer portion between the second cylindrical part and the first cylindrical part. A nozzle is arranged in the second cylindrical part and is used for transmitting sample gas. The polarization electrode, the collector and the ignition wire are sequentially fixed on the second cylindrical part, and are insulated and sealed with the second cylindrical part. The polarization electrode, the collector and the ignition wire which extend into the second cylindrical part are arranged in sequence, and the polarization electrode is connected with the nozzle. The explosion-proof FID has the advantages of high signal-to-noise ratio, good reliability and the like.

Description

technical field [0001] The present invention relates to a FID, in particular to an explosion-proof FID. Background technique [0002] FID, or Flame Ionization Detector, is the most widely used of all gas chromatographic detectors. The performance of the detector itself directly affects the performance of the instrument, such as the repeatability, stability, response factor and many other indicators of the instrument. [0003] The existing flameproof FID detector is designed for the application mode of leak detection in the petrochemical industry. According to the experiment and long-term application data, the hydrogen flow rate of the FID detector is 15-17.5ml / min, the air flow rate is 380-420ml / min, and the hydrogen-to-air ratio is 1:25. The detector cannot be used continuously for a long time, and the signal-to-noise ratio of the detector is low and the detection limit is poor, which cannot meet the normal use requirements of on-line instruments. [0004] The hydrogen-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/68
CPCG01N30/68
Inventor 傅佳沣李永强陈鉴李天麟王琳琳
Owner HANGZHOU PUYU TECH DEV CO LTD
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