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System using chemiluminescence method to execute nitrous oxides analysis

A chemiluminescence, nitrogen oxide technology, applied in chemiluminescence/bioluminescence, analysis by chemical reaction of materials, preparation of samples for testing, etc. Stability, failure analysis and other problems, to achieve the effect of good anti-interference, less quantity, fast response speed of the instrument

Inactive Publication Date: 2008-04-16
SHENYANG DONGYU GRP CO LTD
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Problems solved by technology

[0004] The electrical structure of the existing analysis system is complicated, the fault is not easy to analyze, and the poor ventilation performance leads to the unstable operation of the photomultiplier tube. The on-site communication method is the RS-232 bus, which is the earliest bus used in the environmental monitoring system. Its communication protocol is relatively simple and the price is low. low

Method used

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  • System using chemiluminescence method to execute nitrous oxides analysis
  • System using chemiluminescence method to execute nitrous oxides analysis
  • System using chemiluminescence method to execute nitrous oxides analysis

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Embodiment Construction

[0035] This system (see Figure 14 and Figure 15 ) consists of four functional subsystems: gas system, optical system, electronic system and computer system

[0036] 1. Gas system (such as figure 1 shown)

[0037] The gases used for the analysis (zero gas, calibration gas, sample gas) are fed into the system through a dust filter. There are three different gases in different operating modes: ambient air (sample gas), zero gas and calibration gas. The pipelines in the system are made of Teflon, kynar or stainless steel, which can better ensure the purity of the measured gas. In addition, the Teflon tube is also used to connect the standard gas and zero gas to the system to ensure its purity.

[0038] After the air passes through the particle filter to filter out particles above 5 μm, it must pass through the infiltration dryer in the system to filter out water vapor. This is because on the one hand, water vapor can collide with excited nitrogen dioxide molecules to quen...

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Abstract

The invention relates to a gas analysis system and belongs to the nitrogen oxide analysis field. The system detects the concentration of nitric oxide in the atmosphere by using the power of light generated in the gaseous phase reaction between O3 and nitric oxide (NO) gas. The method is called as a chemiluminescence method. The system is used to measure the concentration of NO, NO2 and the concentration NOX in the atmosphere continuously, reacts rapidly when the concentrations of NO, NO2 and NOX change and can measures stably for a long time; the system can be applied in many conditions of different temperatures and humidity without any impact on the measurement precision. All operation control can be accomplished on an operation panel. The concentration of gas is displayed on the LCD display screen on the operation panel. In addition to the display screen on the operation panel, terminals are also provided to provide measurement output signals. A filter and a sampling instrument are arranged at accessible positions and the whole system is reliable in design and convenient to maintain.

Description

technical field [0001] This system relates to a gas analysis system, especially a chemiluminescence method for NO, NO in the ambient air 2 , NO X A system for component analysis. Background technique [0002] With the deterioration of environmental conditions and the improvement of people's environmental awareness, higher requirements are put forward for environmental supervision. As an important means of environmental supervision, environmental monitoring instruments are getting more and more attention from the government and enterprises. my country has already promulgated the "Ambient Air Quality Standards" and "Comprehensive Emission Standards of Atmospheric Pollutants", and has established more than 6,000 ambient air quality monitoring stations. However, my country's ambient air quality monitoring is basically in the stage of on-site sampling and laboratory analysis, and sampling instruments are mainly manual and semi-automatic. Due to the lack of continuous automati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N1/28G06F17/00
Inventor 庄宇洋李劲松
Owner SHENYANG DONGYU GRP CO LTD
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