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In-position gas analyzing system with in-position calibrating function

A gas analysis system and function technology, which is applied in the direction of analyzing materials, material analysis by optical means, measuring devices, etc., can solve the problems of complex devices, difficult installation and debugging, and high requirements for processing and installation accuracy, and achieves simple device and calibration. Reliable results and low assembly accuracy requirements

Active Publication Date: 2006-03-01
FOCUSED PHOTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention provides an on-site gas analysis system with an on-site calibration function, which overcomes the shortcomings of the existing on-site gas analysis system with an on-site calibration function, such as complex devices, high processing and installation precision requirements, and difficult installation and debugging.

Method used

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  • In-position gas analyzing system with in-position calibrating function
  • In-position gas analyzing system with in-position calibrating function
  • In-position gas analyzing system with in-position calibrating function

Examples

Experimental program
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Embodiment 1

[0035] Such as figure 2 , Figure 7 As shown, the on-site gas analysis system is a non-dispersive infrared spectroscopy (NDIR) gas analysis system. The light emitting device 1 and the light receiving device 9 are connected to the measured process gas pipeline 4 through a mechanical connection structure, including a flange matching body 2 and a valve 3 . The optical path between the light-emitting device 1 and the light-receiving device 9 can be adjusted by adjusting the bolt 10 on the mechanical connection structure to squeeze the O-ring in the middle of the flange mating body 2 .

[0036] The additional tube, that is, the telescopic tube 5 is installed inside the first inner tube 13 connected with the mechanical connection structure, and the telescopic tube 5 is pneumatically driven. The cross section of the telescopic tube is circular, and this structure is easy to process and install. The control device is: the detachable end block 52 is installed on the inner wall of th...

Embodiment 2

[0039] Such as figure 2 , Figure 7 As shown, the measuring tube is the first extension tube 13 and the second extension tube 14 with a mechanical connection structure on both sides of the measured gas pipeline; the additional tube is the telescopic tube 5 installed in the first extension tube, and the telescopic tube 5 is slidably sleeved on the first extension tube 13, and the protruding end of the telescopic tube 5 cooperates with the second extension tube 14; the control device is used to control the telescopic tube to extend into the second extension tube or retract into Drive for the first extension tube.

[0040] All the other structures and working processes of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0042] Such as image 3 , Figure 7 As shown, the on-site analysis system with on-site calibration function described in Embodiment 1 is provided with a gas chamber 8 near the light receiving device 9, and there are ventilation joints 44, 48 on the chamber, and a calibration gas source 57 (including Zero gas and standard gas) are connected through the valve 47 and the ventilation joint 44.

[0043] The working process is as follows: during measurement, control the telescopic tube 5 to retract into the inner cylinder 13 on the side of the light emitting device, and fill the internal aperture of the mechanical connection structure and the inner cylinder 13, 14 through the ventilation joint 41 with a pressure higher than the internal pressure of the process gas pipeline to be measured. Powerful zero gas protects the optical window from contamination and ensures the accuracy of the optical path measurement; the valve 47 is used to control the filling of zero gas into the chamber ...

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Abstract

The gas analysis system includes light-emitting device, light-receiving device, signal analysis device, mechanical connection structure and measuring pipe. The light-emitting device and light-receiving device are mounted on the tested gas pipeline by means of mechanical connection structure. Said system also includes an additional pipe, a control device and a gas replacement device. Said additional pipe and measuring pipe are formed into a basically-closed pipeline which is isolated from tested gas. Said invention also provides the concrete structure of the gas replacement device.

Description

(1) Technical field [0001] The invention relates to an on-site gas analysis system, in particular to an on-site gas analysis system with an on-site calibration function. (2) Background technology [0002] The on-site gas analysis system is different from the traditional sampling method gas analysis system. It does not require sampling and pretreatment process, overcomes many defects of the traditional sampling method gas analysis system, and has the advantages of simple system, high reliability, fast measurement response speed, and analysis It has the advantages of high precision, can measure the concentration and speed of gas, and has been widely used in modern industry, scientific research, environmental protection and other fields. On-site gas analysis systems can be implemented using a variety of absorption spectroscopy techniques, such as non-dispersive infrared spectroscopy (NDIR) technology, differential optical absorption spectroscopy (DOAS) technology, and tunable s...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/01
Inventor 王健熊志才钟安平
Owner FOCUSED PHOTONICS
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