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Dual-optical-path oxynitride analyzer

A nitrogen oxide and analysis device technology, which is applied in the direction of measuring devices, analyzing materials, and material analysis through optical means, can solve problems such as large measurement errors, high failure rates, and slow responses, and achieve offsetting interference and failure rates, The effect of prolonging the service life and reducing interference

Inactive Publication Date: 2015-02-04
武汉怡特环保科技有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a dual optical path nitrogen oxide analysis device, which solves the slow response and large measurement error caused by the switching of nitrogen monoxide and nitrogen dioxide in the prior art; The technical problems of high cost, high failure rate and low precision caused by the use of dual photomultiplier tubes for two-way detection

Method used

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  • Dual-optical-path oxynitride analyzer

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Embodiment 1

[0040] Embodiment 1 of the present invention provides a dual optical path nitrogen oxide analysis device, please refer to figure 1 As shown, the device includes: a reaction part 1, an ozone generating part 16, a conversion part 17, an intake valve 18, a measuring part and a cutting part.

[0041] Wherein, the reaction part has a first reaction tank 8 and a second reaction tank 9 that are independent of each other; the air inlet valve 18 includes an air inlet, a first air outlet communicating with the first reaction tank 8, and a second reaction tank 9 The second air outlet; the conversion part 17 is provided between the first air inlet and the first reaction tank 8, for converting nitrogen dioxide into nitrogen monoxide. The first reaction tank 8 and the second reaction tank 9 are both semicircular cavities, and the reaction part 1 is also provided with an exhaust gas discharge port 6.

[0042] Among them, the first reaction tank 8 is provided with a first nitrogen oxide air inlet ...

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Abstract

The invention relates to the technical field of atmospheric monitoring and in particular relates to a dual-optical-path oxynitride analyzer. The analyzer comprises a reaction unit, an ozone generation unit, a gas inlet valve, a conversion unit, a measuring unit and a light chopping unit, wherein the reaction unit is provided with a first reaction tank and a second reaction tank, which are independent of each other; the light chopping unit comprises a chopper arranged between the reaction unit and the measuring unit. According to the dual-optical-path oxynitride analyzer, the reaction unit is provided with the two reaction tanks, gas switching is avoided, and therefore, the response time is greatly shortened, the interference of a pipeline to a gas to be tested is reduced, the measurement accuracy is improved and the service life of the analyzer is prolonged; as the light chopping unit of the dual-optical-path oxynitride analyzer is provided with the chopper which is switchable between two optical signals generated by the two reaction tanks, the arrangement of two measuring units is not required, and the interference and the fault rate due to two-path detection are avoided; meanwhile, the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of atmospheric monitoring, in particular to a dual optical path nitrogen oxide analysis device. Background technique [0002] Chemiluminescent nitrogen oxide analyzers in the prior art, such as the 42i nitrogen oxide analyzer of TE in the United States, and the T200 nitrogen oxide analyzer of API in the United States, all use a single optical path reaction and a single photomultiplier tube for detection way, this way NO and NO 2 The gas is switched by two two-position three-way solenoid valve groups, and alternately enters the reaction pool to realize NO, NO 2 Concentration measurement, this method is essentially switching between two gases, the disadvantage is that the response is slow, and measurement errors are prone to occur; long-term work, the gas circuit is easy to block, resulting in gas circuit failure. Another kind of nitrogen oxide analyzer in the prior art, such as a kind of 8840 nitrogen oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/03
Inventor 代波华郭婷郭鹏
Owner 武汉怡特环保科技有限公司
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