A method and device for online detection of chlorine dioxide gas concentration

A chlorine dioxide and gas concentration technology, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as unsuitable continuous detection, loss of chlorine dioxide gas, small range, etc., to reduce photochemical reaction time, reduce corrosion and staining Attachment, the effect of reducing the detection error

Inactive Publication Date: 2011-11-30
SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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Problems solved by technology

The electrochemical sensor has the following problems: the range is small, the maximum detection concentration is 100PPM; the life is short, the longest life is only two years; it is not suitable for online continuous detection; the sensor may fail when it exceeds the range
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  • A method and device for online detection of chlorine dioxide gas concentration
  • A method and device for online detection of chlorine dioxide gas concentration
  • A method and device for online detection of chlorine dioxide gas concentration

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] refer to figure 1 with figure 2 , implementing a method for on-line detection of chlorine dioxide gas concentration of the present invention, said method may further comprise the steps:

[0031] A. The mixed gas containing chlorine dioxide gas to be measured flows through the gas chamber 7 from the gas inlet 6 to the gas outlet 12 under the effect of external power;

[0032] B. The control unit 16 outputs a pulse with a certain period and a certain duty ratio to the light source driving circuit 15 through the output port;

[0033] C. The light source driving circuit 15 drives the light source 1;

[0034] D. The light emitted by the light source 1 is converged into approximately parallel rays through the collimator lens 2;

[0035] E. A part of the parallel light is reflected by the beam splitter 3, and then passes through the reference focus...

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Abstract

The invention discloses a method and a device capable of detecting the concentration of chlorine dioxide gas on-line and in real time. The device of the present invention is that the centers of the light source, collimating lens, beam splitter, gas chamber, detection focusing lens and detection detector are arranged sequentially on the same horizontal plane, the beam splitter is installed at 45 degrees to the incident parallel light rays, and the beam splitter is arranged below the beam splitter in sequence Referring to the focusing lens and the reference detector, the upper and lower surfaces of the gas chamber are respectively provided with a gas inlet and a gas outlet; the light source drive circuit is connected to the light source, the signal processing circuit is respectively connected to the reference detector, the detection detector and the analog-to-digital conversion circuit, and the control unit The analog-to-digital conversion circuit, the light source driving circuit and the auxiliary function unit are respectively connected. The method of the present invention is that the mixed gas containing chlorine dioxide gas to be measured flows through the gas chamber directionally from the gas inlet to the gas outlet under the action of external power, and the concentration of the chlorine dioxide gas is obtained through the signal transmission and calculation of the above-mentioned device. The invention can continuously detect on-line, and the concentration detection range can be from PPM level to mg/L level.

Description

technical field [0001] The invention relates to the field of gas concentration detection, in particular to a method and device for online detection of chlorine dioxide gas concentration. Background technique [0002] Chlorine dioxide is the only high-efficiency disinfectant among internationally recognized chlorine-containing disinfectants, and was registered as a disinfectant by the US Environmental Protection Agency in 1998. Experiments have proved that chlorine dioxide gas disinfection has the characteristics of broad spectrum, high efficiency, rapidity, and no three causes (carcinogenic, teratogenic, mutagenic), and is mainly used in space disinfection, water treatment, fruit preservation and other fields. [0003] When chlorine dioxide gas is used for disinfection, it is emphasized that its concentration must be kept within a certain range to ensure the disinfection effect. Therefore, a chlorine dioxide gas concentration detection device is needed to detect, feed back, ...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 衣颖吴金辉祁建城李艳菊
Owner SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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