WO2022252292A1 - Difference method-based ozone and voc content measuring system and method - Google Patents
Difference method-based ozone and voc content measuring system and method Download PDFInfo
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- WO2022252292A1 WO2022252292A1 PCT/CN2021/100533 CN2021100533W WO2022252292A1 WO 2022252292 A1 WO2022252292 A1 WO 2022252292A1 CN 2021100533 W CN2021100533 W CN 2021100533W WO 2022252292 A1 WO2022252292 A1 WO 2022252292A1
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims description 120
- 238000005259 measurement Methods 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000011088 calibration curve Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000005375 photometry Methods 0.000 claims 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052753 mercury Inorganic materials 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 103
- 239000003570 air Substances 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 7
- 239000012080 ambient air Substances 0.000 description 6
- 239000002243 precursor Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 206010008479 Chest Pain Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000004199 lung function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
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- 208000024891 symptom Diseases 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the invention relates to a differential ozone and VOC monitoring system, which can simultaneously and accurately monitor the concentrations of ozone and VOC in real time, effectively avoiding the interference of water vapor, gaseous mercury, organic matter, etc. on the measurement system.
- Ozone is an important trace gas in the earth's atmosphere, which has an important impact on the human living environment.
- Ozone itself is a harmful gas to the human body. Higher ozone concentrations can cause harm to human health. High concentrations of ozone can irritate the mucous membranes of the eyes, nose, and throat, and affect the respiratory system such as the bronchi and lungs, especially damage the Lung function in children, causing symptoms such as chest pain, nausea, and fatigue. In severe cases, it can also cause death.
- Tropospheric ozone is also a greenhouse gas, and its direct climate effect leads to an average annual warming of 0.3°C in the Arctic. The increase of ground ozone concentration will pose a huge threat to the sustainable development of human society. Therefore, it is of great significance to study ozone.
- ozone pollution has been used as one of the routine indicators for ambient atmospheric environment monitoring, especially with the acceleration of industrialization in my country and the deepening of environmental protection, the primary pollutants in the ambient air have changed from PM2.5 to PM2.5 and ozone
- the monitoring data shows that the ozone concentration in most areas of my country has been increasing year by year in recent years, so it has attracted more and more scholar' attention.
- the new "Ambient Air Quality Standard” (GB 3095-2012) implemented in China has added ozone (0 3 ) monitoring items.
- Ozone is a typical secondary pollutant, and controlling the emission of its precursors is the key to governance.
- the precursors of ozone are mainly nitrogen oxides and volatile organic pollutants, and these two pollutants are also precursors of secondary fine particles. Therefore, effective control of the emission of these two precursors is not only very important for the control of ozone pollution, but also for the prevention and control of PM2.5.
- Ultraviolet absorption ozone monitoring equipment does not require special reagents, is safe and convenient, and can monitor and analyze in real time. It can accurately and effectively monitor the ozone concentration in ambient air in real time. It has been widely used in various local ambient air monitoring stations.
- a kind of ozone and VOC content detection system based on difference method comprises intake assembly, and described intake assembly comprises calibration gas intake assembly for calibration gas, zero gas intake assembly for zero gas, sample gas intake assembly for sample gas
- the sample gas inlet assembly, the standard gas inlet assembly, the zero gas inlet assembly and the sample gas inlet assembly are connected to the detection device after passing through the four-way valve.
- the detection device includes an ozone heating device and an ultraviolet light connected to the ozone heating device. Photometric detection device.
- the ultraviolet photometric detection device of the detection device includes a gas detection gas chamber, two ends of the gas detection gas chamber are provided with detection windows, and one end window is provided with an ultraviolet The light source, the window at the other end is provided with a signal receiving and detecting component, and the two ends of the upper end surface of the gas detection chamber are respectively provided with an air inlet and an air outlet.
- the standard gas intake assembly includes the calibration gas intake pipe A, the sample gas intake assembly includes the sample gas intake pipe C, and the zero air intake assembly includes the zero air intake pipe B;
- the detection device also includes a three-way valve; the four-way valve is connected to the three-way valve through a common pipe and connected to the ultraviolet photometric detection device after the heating pipe D is connected to the ozone heating device; the four-way valve is also connected to the three-way valve through the public pipe After connection, it is connected to the ultraviolet photometric detection device through the normal temperature tube E.
- the ozone heating device includes a hollow heat-conducting cylinder, and the sample gas inlet pipe is connected to the three-way valve and spirally wound from one end of the outer wall of the hollow heat-conducting cylinder to the hollow heat-conducting cylinder The other end of the outer wall is connected to the air inlet of the ultraviolet photometric detection device, and the heating rod electrically connected to the heating controller is arranged in the hollow heat conducting cylinder.
- the signal receiving and detecting component includes an ultraviolet light receiver and a sensor module connected with the ultraviolet light receiver.
- an optical filter is also provided between the ultraviolet light receiver and the window at the other end.
- the ozone heating device further includes a protective cover, and a part of the sample gas inlet pipe spirally wound on the outer wall of the hollow heat conducting cylinder is wrapped in the protective cover.
- ozone and VOC content detection system based on the differential method, it also includes a gas cooling and constant temperature component, which is arranged between the ozone heating device and the ultraviolet photometric detection device, and is used to cool the sample gas after heating treatment to room temperature or After the set temperature is maintained at a constant temperature, it is transported to the ultraviolet photometric detection device.
- a gas cooling and constant temperature component which is arranged between the ozone heating device and the ultraviolet photometric detection device, and is used to cool the sample gas after heating treatment to room temperature or After the set temperature is maintained at a constant temperature, it is transported to the ultraviolet photometric detection device.
- the ultraviolet photometric detection device further includes a heating wire spirally wound on the outer wall of the gas detection gas, and the heating wire includes an insulation layer outside.
- a method for detecting ozone and VOC content based on a differential method comprising:
- Measurement steps including:
- Zero gas measurement the zero gas that does not contain the gas components to be measured is passed through the zero gas intake pipe B and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero (measurement) corresponding to the current concentration;
- Sample gas measurement pass the sample gas of unknown concentration through the sample gas inlet pipe C and enter the ultraviolet photometric detection device after passing through the heating tube D to obtain the detection voltage value V sample (measurement) corresponding to the current concentration; pass the sample gas of unknown concentration through the sample gas After the intake pipe C, enter the ultraviolet photometric detection device to obtain the detection voltage value V ' sample (testing) corresponding to the current concentration after passing through the normal temperature pipe E;
- the zero gas passes through the zero gas inlet pipe B and then enters the ultraviolet photometric detection device through the normal temperature pipe E; when the sample gas is measured, the three-way valve presses Switch the heating tube D and the normal temperature tube E at the set interval time, so that the sample gas automatically enters the heating tube D or the normal temperature tube E after passing through the common tube.
- the present invention has the following advantages:
- the present invention adopts double differential ultraviolet absorption method to measure the concentration of ozone and VOC simultaneously.
- the ultraviolet absorption method is susceptible to the influence of various environmental interference factors as the classic method of ambient air ozone concentration measurement, and the technology and method that the present invention adopts have overcome all kinds of interference factors (the photochemical product of water, gaseous mercury, aromatic compound, VOC, etc.), can achieve accurate measurement of ozone.
- the continuous measurement process is not disturbed by common air pollutants.
- the technology adopted in the present invention does not need additional dangerous and polluting special reagents and consumables, and has high safety and strong practicability.
- the invention relates to an ozone and VOC content detection system based on a differential method.
- the sample gas inlet assembly for the sample gas, the standard gas inlet assembly, the zero air inlet assembly and the sample gas inlet assembly are connected to the detection device after passing through the four-way valve.
- the detection device includes an ozone heating device and an ozone heating device. Connect the UV photometric detection device.
- the standard gas inlet assembly includes a standard gas inlet pipe A, the sample gas inlet assembly includes a sample gas inlet pipe C, and the zero air inlet assembly includes a zero air inlet pipe B;
- the detection device also includes a three-way valve; the four-way valve passes through the common pipe It is connected to the three-way valve and connected to the ozone heating device through the heating pipe D, and then connected to the ultraviolet photometric detection device; the four-way valve is also connected to the three-way valve through a common pipe, and then connected to the ultraviolet photometric detection device through the normal temperature pipe E.
- the ultraviolet photometric detection device of the detection device includes a gas detection gas chamber. There are detection windows at both ends of the gas detection gas chamber. One end of the window is equipped with an ultraviolet light source, and the other end of the window is equipped with a signal receiving and detection component. The two ends of the gas detection gas chamber are There are air inlets and outlets respectively.
- the ultraviolet photometric detection device also includes a heating wire spirally wound on the outer wall of the gas detection gas, and the heating wire includes an insulation layer outside.
- the thermal insulation layer may be thermal insulation materials such as asbestos, sponge or glass wool.
- the ozone heating device includes a hollow heat conduction cylinder, the sample gas inlet pipe is connected with the three-way valve, and then spirally wound from one end of the outer wall of the hollow heat conduction cylinder to the other end of the outer wall of the hollow heat conduction cylinder, and then connected to the inlet port of the ultraviolet photometric detection device, and connected to the heating
- the heating rod electrically connected to the controller is arranged in the hollow heat conduction cylinder.
- the ozone heating device also includes a protective cover, which wraps part of the sample gas inlet pipe spirally wound on the outer wall of the hollow heat conducting cylinder in the protective cover.
- the signal receiving and detecting component includes an ultraviolet light receiver and a sensor module connected with the ultraviolet light receiver, and an optical filter is also arranged between the ultraviolet light receiver and the window at the other end.
- it also includes a gas cooling and constant temperature component, which is arranged between the ozone heating device and the ultraviolet photometric detection device, and is used to cool the sample gas after heating treatment to room temperature or a set temperature and keep it in a constant temperature state before transporting into the UV photometric detection device.
- a gas cooling and constant temperature component which is arranged between the ozone heating device and the ultraviolet photometric detection device, and is used to cool the sample gas after heating treatment to room temperature or a set temperature and keep it in a constant temperature state before transporting into the UV photometric detection device.
- the present invention also relates to a method for detecting VOC and ozone content based on a differential method.
- the ultraviolet photometric detection device In the atmosphere, only VOC and ozone will have a strong reaction to ultraviolet light. Therefore, when the gas contains VOC or ozone or a mixture of the two, the ultraviolet photometric detection device will feed back different voltage values according to the gas concentration, but not For gases containing VOC or ozone or a mixture of the two, the ultraviolet photometric detection device only has a weak voltage value feedback. Based on this principle, the above-mentioned device in the inventive invention of the present invention can simultaneously measure the concentration of VOC or ozone.
- the present invention involves Gases are defined as follows:
- Zero air includes: treated air that does not contain impurities such as ozone and VOC;
- Standard gas includes: standard gas containing only filling gas with known concentration and no interference to measurement;
- Sample gas includes: ambient air to be measured, mixed gas containing VOC, ozone, oxygen, nitrogen, etc.
- Measurement steps including:
- Zero gas measurement the zero gas that does not contain the gas components to be measured is passed through the zero gas intake pipe B and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero (measurement) corresponding to the current concentration;
- Sample gas measurement the sample gas with unknown concentration passes through the sample gas inlet pipe C, then passes through the heating pipe D, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V sample (measurement) corresponding to the current concentration.
- the ozone is heated , converted into oxygen, therefore, the sample gas after heating does not contain ozone;
- the sample gas of unknown concentration passes through the sample gas inlet pipe C, then passes through the normal temperature pipe E, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V' corresponding to the current concentration sample (test) ;
- the three-way valve automatically switches back and forth between the heating pipe B and the normal temperature pipe E every 5 seconds. Therefore, in the zero gas measurement, the zero gas passes through the zero gas inlet pipe B and then enters the normal temperature pipe E.
- Ultraviolet photometric detection device when the sample gas is measured, the three-way valve switches the heating tube D and the normal temperature tube E according to the set interval time, so that the sample gas automatically enters the heating tube D or the normal temperature tube E after passing through the common tube.
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
A difference method-based ozone and VOC content measuring system and method, which may simultaneously and accurately monitor in real time the concentration of ozone and VOC and effectively prevent the interference of water vapor, gaseous mercury, organic matter and the like on the measuring system. The measuring system comprises gas intake assemblies, the gas intake assemblies include a standard gas intake assembly for standard gas, a zero gas intake assembly for zero gas, and a sample gas intake assembly for sample gas, wherein the standard gas intake assembly, the zero gas intake assembly and the sample gas intake assembly are connected to a measuring device after passing through a four-way valve; and the measuring device comprises an ozone heating device and an ultraviolet light intensity measuring device that is connected to the ozone heating device.
Description
本发明涉及一种差分法臭氧和VOC的监测系统，可同时实时、准确监测臭氧和VOC的浓度，有效避免了水汽、气态汞、有机物等对测量系统的干扰。The invention relates to a differential ozone and VOC monitoring system, which can simultaneously and accurately monitor the concentrations of ozone and VOC in real time, effectively avoiding the interference of water vapor, gaseous mercury, organic matter, etc. on the measurement system.
臭氧是地球大气中的一种重要痕量气体，对人类生活环境有着重要的影响。臭氧本身是一种对人体有害的气体，较高的臭氧浓度会对人体健康产生危害，高浓度臭氧会刺激眼、鼻、喉咙的黏膜，对支气管及肺等呼吸系统造成影响，特别是会损伤儿童的肺功能，引发胸疼、恶心、疲乏等症状。在严重情况下，还会造成死亡事件。对流层臭氧同时也是一种温室气体，其直接气候效应导致北极地区增温年均达0.3℃。地面臭氧浓度升高将对人类社会可持续发展产生巨大威胁。因此，研究臭氧具有非常重要的意义。Ozone is an important trace gas in the earth's atmosphere, which has an important impact on the human living environment. Ozone itself is a harmful gas to the human body. Higher ozone concentrations can cause harm to human health. High concentrations of ozone can irritate the mucous membranes of the eyes, nose, and throat, and affect the respiratory system such as the bronchi and lungs, especially damage the Lung function in children, causing symptoms such as chest pain, nausea, and fatigue. In severe cases, it can also cause death. Tropospheric ozone is also a greenhouse gas, and its direct climate effect leads to an average annual warming of 0.3°C in the Arctic. The increase of ground ozone concentration will pose a huge threat to the sustainable development of human society. Therefore, it is of great significance to study ozone.
近年来，臭氧污染作为环境大气环境监测的常规指标之一，尤其是随着我国工业化进展的加快和环境保护的深入，环境空气中的首要污染物已经由PM2.5向PM2.5和臭氧交替出现的局面，监测数据表明，近年来我国大部分地区臭氧浓度逐年上升的趋势，因此受越来越多学者的重点关注。针对日益凸显的臭氧污染，我国实施的新《环境空气质量标准》(GB 3095-2012)中，增加了臭氧(0
3)监测项目。臭氧是典型的二次污染物，控制其前体物排放是治理的关键。臭氧的前体物主要是氮氧化物和挥发性有机 污染物，而这两种污染物同样也是二次细颗粒物的前体物。因此，有效控制这两项前体物的排放不仅对控制臭氧污染非常重要，对防治PM2.5同样重要。
In recent years, ozone pollution has been used as one of the routine indicators for ambient atmospheric environment monitoring, especially with the acceleration of industrialization in my country and the deepening of environmental protection, the primary pollutants in the ambient air have changed from PM2.5 to PM2.5 and ozone The monitoring data shows that the ozone concentration in most areas of my country has been increasing year by year in recent years, so it has attracted more and more scholars' attention. In response to the increasingly prominent ozone pollution, the new "Ambient Air Quality Standard" (GB 3095-2012) implemented in China has added ozone (0 3 ) monitoring items. Ozone is a typical secondary pollutant, and controlling the emission of its precursors is the key to governance. The precursors of ozone are mainly nitrogen oxides and volatile organic pollutants, and these two pollutants are also precursors of secondary fine particles. Therefore, effective control of the emission of these two precursors is not only very important for the control of ozone pollution, but also for the prevention and control of PM2.5.
由于臭氧的高氧化性，对它进行高灵敏度监测分析的方法仍是一项极具挑战性的任务。紫外吸收法臭氧监测设备无需特殊试剂、安全方便、实时监测分析，能够准确有效的进行环境空气臭氧浓度实时监测，现已被广泛用于各地方环境空气监测站中。Due to the high oxidizing properties of ozone, a highly sensitive monitoring and analysis method for it is still a very challenging task. Ultraviolet absorption ozone monitoring equipment does not require special reagents, is safe and convenient, and can monitor and analyze in real time. It can accurately and effectively monitor the ozone concentration in ambient air in real time. It has been widely used in various local ambient air monitoring stations.
发明内容Contents of the invention
本发明的上述技术问题主要是通过下述技术方案得以解决的：Above-mentioned technical problem of the present invention is mainly solved by following technical scheme:
一种基于差分法的臭氧及VOC含量检测系统，包括进气组件，所述进气组件包括用于标气的标气进气组件、用于零气的零气进气组件、用于样气的样气进气组件，标气进气组件、零气进气组件以及样气进气组件经过四通阀后与检测装置连接，所述检测装置包括臭氧加热装置以及与臭氧加热装置连接的紫外光度检测装置。A kind of ozone and VOC content detection system based on difference method, comprises intake assembly, and described intake assembly comprises calibration gas intake assembly for calibration gas, zero gas intake assembly for zero gas, sample gas intake assembly for sample gas The sample gas inlet assembly, the standard gas inlet assembly, the zero gas inlet assembly and the sample gas inlet assembly are connected to the detection device after passing through the four-way valve. The detection device includes an ozone heating device and an ultraviolet light connected to the ozone heating device. Photometric detection device.
在上述的一种基于差分法的臭氧及VOC含量检测系统，所述检测装置的紫外光度检测装置，包括气体检测气室，所述气体检测气室两端设有检测窗口，一端窗口设有紫外光源，另一端窗口设有信号接收检测组件，气体检测气室上端面的两端分别设有进气口和出气口。In the above-mentioned ozone and VOC content detection system based on the differential method, the ultraviolet photometric detection device of the detection device includes a gas detection gas chamber, two ends of the gas detection gas chamber are provided with detection windows, and one end window is provided with an ultraviolet The light source, the window at the other end is provided with a signal receiving and detecting component, and the two ends of the upper end surface of the gas detection chamber are respectively provided with an air inlet and an air outlet.
在上述的一种基于差分法的臭氧及VOC含量检测系统，标气进气组件包括标气进气管A，样气进气组件包括样气进气管C，零气进气组件包括零气进气管B；检测装置还包括三通阀；四通阀经公共管与三通阀连接并经过加热管D与臭氧加热装置连接后与紫外光度检测装置连接；四通阀还经公共管与三通阀连接后经过常温管E与紫外光度检测装置连接。In the above-mentioned ozone and VOC content detection system based on the differential method, the standard gas intake assembly includes the calibration gas intake pipe A, the sample gas intake assembly includes the sample gas intake pipe C, and the zero air intake assembly includes the zero air intake pipe B; the detection device also includes a three-way valve; the four-way valve is connected to the three-way valve through a common pipe and connected to the ultraviolet photometric detection device after the heating pipe D is connected to the ozone heating device; the four-way valve is also connected to the three-way valve through the public pipe After connection, it is connected to the ultraviolet photometric detection device through the normal temperature tube E.
在上述的一种基于差分法的臭氧及VOC含量检测系统，所述臭氧加热装置包括一个空心导热筒，样气进气管与三通阀连接后从空心导热筒外壁的一端螺旋缠绕至空心导热筒外壁的另一端后与紫外光度检测装置的进气口连接，与加热控制器电连接的加热棒设置在空心导热筒内。In the above-mentioned ozone and VOC content detection system based on the differential method, the ozone heating device includes a hollow heat-conducting cylinder, and the sample gas inlet pipe is connected to the three-way valve and spirally wound from one end of the outer wall of the hollow heat-conducting cylinder to the hollow heat-conducting cylinder The other end of the outer wall is connected to the air inlet of the ultraviolet photometric detection device, and the heating rod electrically connected to the heating controller is arranged in the hollow heat conducting cylinder.
在上述的一种基于差分法的臭氧及VOC含量检测系统，信号接收检测组件包括紫外光接收器以及与紫外光接收器连接的传感器模块。In the above-mentioned ozone and VOC content detection system based on the differential method, the signal receiving and detecting component includes an ultraviolet light receiver and a sensor module connected with the ultraviolet light receiver.
在上述的一种基于差分法的臭氧及VOC含量检测系统，所述紫外光接收器和另一端窗口之间还设有滤光片。In the above-mentioned ozone and VOC content detection system based on the differential method, an optical filter is also provided between the ultraviolet light receiver and the window at the other end.
在上述的一种基于差分法的臭氧及VOC含量检测系统，所述臭氧加热装置还包括一个保护套，将螺旋缠绕在空心导热筒外壁的部分样气进气管包裹在保护套内。In the above-mentioned ozone and VOC content detection system based on the differential method, the ozone heating device further includes a protective cover, and a part of the sample gas inlet pipe spirally wound on the outer wall of the hollow heat conducting cylinder is wrapped in the protective cover.
在上述的一种基于差分法的臭氧及VOC含量检测系统，还包括气体降温及恒温组件，设置在臭氧加热装置和紫外光度检测装置之间，用于将加热处理后的样气降温至室温或设定的温度并保持恒温状态后输送至紫外光度检测装置内。In the above-mentioned ozone and VOC content detection system based on the differential method, it also includes a gas cooling and constant temperature component, which is arranged between the ozone heating device and the ultraviolet photometric detection device, and is used to cool the sample gas after heating treatment to room temperature or After the set temperature is maintained at a constant temperature, it is transported to the ultraviolet photometric detection device.
在上述的一种基于差分法的臭氧及VOC含量检测系统，紫外光度检测装置还包括螺旋缠绕在气体检测气室外壁的加热丝，所述加热丝外包括有保温层。In the above-mentioned ozone and VOC content detection system based on the differential method, the ultraviolet photometric detection device further includes a heating wire spirally wound on the outer wall of the gas detection gas, and the heating wire includes an insulation layer outside.
一种基于差分法的臭氧及VOC含量检测方法，包括：A method for detecting ozone and VOC content based on a differential method, comprising:
标定步骤：将不同浓度的标气经标气进气管A后进入紫外光度检测装置得到不同浓度对应的检测电压值V
标；将不同浓度的零气经零气进气管B后进入紫外光度检测装置得到不同浓度对应的检测电压值V
零；从而得到气体浓度标定曲线：Q
标＝aV，其中，Q
臭氧(标)为标定状态下气体浓度，a为标定系数；
Calibration steps: put the calibration gas of different concentrations into the ultraviolet photometric detection device through the calibration gas inlet pipe A to obtain the detection voltage value V standard corresponding to different concentrations; put the zero gas of different concentrations into the ultraviolet photometric detection device through the zero gas inlet pipe B Obtain the detection voltage value V zero corresponding to different concentrations; thereby obtain the gas concentration calibration curve: Q standard =aV, wherein, Q ozone (standard) is the gas concentration under the calibration state, and a is the calibration coefficient;
测量步骤，包括：Measurement steps, including:
零气测量：将不含待测气成份的零气经零气进气管B后进入紫外光度检测装置得到当前浓度对应的检测电压值V
零(测)；
Zero gas measurement: the zero gas that does not contain the gas components to be measured is passed through the zero gas intake pipe B and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero (measurement) corresponding to the current concentration;
样气测量：将未知浓度的样气经样气进气管C后通过加热管D后进入紫外光度检测装置得到当前浓度对应的检测电压值V
样(测)；将未知浓度的样气经样气进气管C后通过常温管E后进入紫外光度检测装置得到当前浓度对应的检测电压值V′
样(测)；
Sample gas measurement: pass the sample gas of unknown concentration through the sample gas inlet pipe C and enter the ultraviolet photometric detection device after passing through the heating tube D to obtain the detection voltage value V sample (measurement) corresponding to the current concentration; pass the sample gas of unknown concentration through the sample gas After the intake pipe C, enter the ultraviolet photometric detection device to obtain the detection voltage value V ' sample (testing) corresponding to the current concentration after passing through the normal temperature pipe E;
浓度计算：臭氧浓度Q
臭＝a(V′
样(测)-V
样(测)-V
零(测))；VOC浓度Q
voc＝a(V
样(测)-V
零(测))。
Concentration calculation: ozone concentration Q odour =a(V'sample (test) -V sample (test) -V zero (test) ); VOC concentration Q voc =a(V sample (test) -V zero (test) ).
在上述的一种基于差分法的臭氧及VOC含量检测方法，标定步骤的具体过程是：在T
标时间内，将相对湿度为10％-100％的不同浓度的标气经标气进气管A后通过三通阀经常温管E或加热管D后进入紫外光度检测装置得到不同浓度对应的检测电压值V
标；在T
零时间内，将相对湿度为10％-100％的不同浓度的零气经零气进气管b后通过三通阀经常温管E或加热管D后进入紫外光度检测装置得到不同浓度对应的检测电压值V
零；从而得到气体浓度标定曲线：Q
标＝aV，其中，Q
臭氧(标)为标定状态下气体浓度；
In the above-mentioned ozone and VOC content detection method based on the differential method, the specific process of the calibration step is: within the T calibration time, the calibration gas of different concentrations with a relative humidity of 10%-100% is passed through the calibration gas intake pipe A After passing through the three-way valve, the constant temperature tube E or the heating tube D, enter the ultraviolet photometric detection device to obtain the detection voltage value V corresponding to different concentrations; After the gas passes through the zero gas intake pipe b, it passes through the three-way valve constant temperature pipe E or the heating pipe D, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero corresponding to different concentrations; thereby obtaining the gas concentration calibration curve: Q standard = aV, where , Qozone (standard) is the gas concentration in the calibration state;
在上述的一种基于差分法的臭氧及VOC含量检测方法，零气测量中，零气经零气进气管B后通过常温管E后进入紫外光度检测装置；样气测量时，三通阀按设定的间隔时间切换加热管D和常温管E，使样气经公共管后自动进入加热管D或常温管E中。In the above-mentioned ozone and VOC content detection method based on the differential method, in the zero gas measurement, the zero gas passes through the zero gas inlet pipe B and then enters the ultraviolet photometric detection device through the normal temperature pipe E; when the sample gas is measured, the three-way valve presses Switch the heating tube D and the normal temperature tube E at the set interval time, so that the sample gas automatically enters the heating tube D or the normal temperature tube E after passing through the common tube.
因此，本发明具有如下优点：Therefore, the present invention has the following advantages:
1.本发明采用双差分紫外吸收法同时测量臭氧和VOC的浓度。1. The present invention adopts double differential ultraviolet absorption method to measure the concentration of ozone and VOC simultaneously.
2.紫外吸收法作为环境空气臭氧浓度测量的经典方法易受各种环境干扰因素的影响，本发明采用的技术和方法克服了各类干扰因素(水、气态汞、 芳香族化合物的光化学产物、VOC等)的影响，可实现对臭氧的准确测量。连续测量过程不受常见空气污染物的干扰。2. the ultraviolet absorption method is susceptible to the influence of various environmental interference factors as the classic method of ambient air ozone concentration measurement, and the technology and method that the present invention adopts have overcome all kinds of interference factors (the photochemical product of water, gaseous mercury, aromatic compound, VOC, etc.), can achieve accurate measurement of ozone. The continuous measurement process is not disturbed by common air pollutants.
3.本发明采用的技术不需要另外增加具有危险性和具有污染的特殊试剂和耗材，安全性高，实用性强。3. The technology adopted in the present invention does not need additional dangerous and polluting special reagents and consumables, and has high safety and strong practicability.
附图1是本发明的一种原理图。Accompanying drawing 1 is a kind of schematic diagram of the present invention.
附图2是本发明中臭氧加热装置的结构图。Accompanying drawing 2 is the structural diagram of ozone heating device among the present invention.
附图3是本发明中紫外光度检测装置的结构图。Accompanying drawing 3 is the structural diagram of the ultraviolet photometric detection device in the present invention.
下面通过实施例，并结合附图，对本发明的技术方案作进一步具体的说明。The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.
实施例：Example:
本发明涉及一种基于差分法的臭氧及VOC含量检测系统，包括进气组件，所述进气组件包括用于标气的标气进气组件、用于零气的零气进气组件、用于样气的样气进气组件，标气进气组件、零气进气组件以及样气进气组件经过四通阀后与检测装置连接，所述检测装置包括臭氧加热装置以及与臭氧加热装置连接的紫外光度检测装置。The invention relates to an ozone and VOC content detection system based on a differential method. The sample gas inlet assembly for the sample gas, the standard gas inlet assembly, the zero air inlet assembly and the sample gas inlet assembly are connected to the detection device after passing through the four-way valve. The detection device includes an ozone heating device and an ozone heating device. Connect the UV photometric detection device.
标气进气组件包括标气进气管A，样气进气组件包括样气进气管C，零气进气组件包括零气进气管B；检测装置还包括三通阀；四通阀经公共管与三通阀连接并经过加热管D与臭氧加热装置连接后与紫外光度检测装置连接；四通阀还经公共管与三通阀连接后经过常温管E与紫外光度检测装置连接。The standard gas inlet assembly includes a standard gas inlet pipe A, the sample gas inlet assembly includes a sample gas inlet pipe C, and the zero air inlet assembly includes a zero air inlet pipe B; the detection device also includes a three-way valve; the four-way valve passes through the common pipe It is connected to the three-way valve and connected to the ozone heating device through the heating pipe D, and then connected to the ultraviolet photometric detection device; the four-way valve is also connected to the three-way valve through a common pipe, and then connected to the ultraviolet photometric detection device through the normal temperature pipe E.
检测装置的紫外光度检测装置，包括气体检测气室，气体检测气室两端设有检测窗口，一端窗口设有紫外光源，另一端窗口设有信号接收检测 组件，气体检测气室上端面的两端分别设有进气口和出气口。紫外光度检测装置还包括螺旋缠绕在气体检测气室外壁的加热丝，加热丝外包括有保温层。在本实施例中，保温层可以是石棉、海绵或者玻璃棉等保温材料。The ultraviolet photometric detection device of the detection device includes a gas detection gas chamber. There are detection windows at both ends of the gas detection gas chamber. One end of the window is equipped with an ultraviolet light source, and the other end of the window is equipped with a signal receiving and detection component. The two ends of the gas detection gas chamber are There are air inlets and outlets respectively. The ultraviolet photometric detection device also includes a heating wire spirally wound on the outer wall of the gas detection gas, and the heating wire includes an insulation layer outside. In this embodiment, the thermal insulation layer may be thermal insulation materials such as asbestos, sponge or glass wool.
臭氧加热装置包括一个空心导热筒，样气进气管与三通阀连接后从空心导热筒外壁的一端螺旋缠绕至空心导热筒外壁的另一端后与紫外光度检测装置的进气口连接，与加热控制器电连接的加热棒设置在空心导热筒内。臭氧加热装置还包括一个保护套，将螺旋缠绕在空心导热筒外壁的部分样气进气管包裹在保护套内。The ozone heating device includes a hollow heat conduction cylinder, the sample gas inlet pipe is connected with the three-way valve, and then spirally wound from one end of the outer wall of the hollow heat conduction cylinder to the other end of the outer wall of the hollow heat conduction cylinder, and then connected to the inlet port of the ultraviolet photometric detection device, and connected to the heating The heating rod electrically connected to the controller is arranged in the hollow heat conduction cylinder. The ozone heating device also includes a protective cover, which wraps part of the sample gas inlet pipe spirally wound on the outer wall of the hollow heat conducting cylinder in the protective cover.
信号接收检测组件包括紫外光接收器以及与紫外光接收器连接的传感器模块，紫外光接收器和另一端窗口之间还设有滤光片。The signal receiving and detecting component includes an ultraviolet light receiver and a sensor module connected with the ultraviolet light receiver, and an optical filter is also arranged between the ultraviolet light receiver and the window at the other end.
在本实施例中，还包括气体降温及恒温组件，设置在臭氧加热装置和紫外光度检测装置之间，用于将加热处理后的样气降温至室温或设定的温度并保持恒温状态后输送至紫外光度检测装置内。In this embodiment, it also includes a gas cooling and constant temperature component, which is arranged between the ozone heating device and the ultraviolet photometric detection device, and is used to cool the sample gas after heating treatment to room temperature or a set temperature and keep it in a constant temperature state before transporting into the UV photometric detection device.
本发明还涉及一种基于差分法的VOC及臭氧含量检测方法，在本方法中，先介绍一下本发明基于原理：The present invention also relates to a method for detecting VOC and ozone content based on a differential method. In this method, first introduce the principle of the present invention:
大气中，仅有VOC以及臭氧会对于紫外光会有强反应，因此，当气体中包含有VOC或臭氧或两者混合物时，紫外光度检测装置会根据气体浓度反馈不同的电压值，而对不包含VOC或臭氧或两者混合物的气体，紫外光度检测装置仅有微弱的电压值反馈，基于这一原理，本发明创造性的发明上上述的装置可以同时测量VOC或臭氧的浓度，本发明涉及的气体定义如下：In the atmosphere, only VOC and ozone will have a strong reaction to ultraviolet light. Therefore, when the gas contains VOC or ozone or a mixture of the two, the ultraviolet photometric detection device will feed back different voltage values according to the gas concentration, but not For gases containing VOC or ozone or a mixture of the two, the ultraviolet photometric detection device only has a weak voltage value feedback. Based on this principle, the above-mentioned device in the inventive invention of the present invention can simultaneously measure the concentration of VOC or ozone. The present invention involves Gases are defined as follows:
零气包括：经过处理后不含臭氧、VOC等杂质的空气；Zero air includes: treated air that does not contain impurities such as ozone and VOC;
标气包括：只含已知浓度和对测量不产生任何干扰的填充气的标准气体；Standard gas includes: standard gas containing only filling gas with known concentration and no interference to measurement;
样气包括：需要测量的环境空气，含有VOC、臭氧、氧气、氮气等的混合气体。Sample gas includes: ambient air to be measured, mixed gas containing VOC, ozone, oxygen, nitrogen, etc.
下面介绍结合上述装置进行测量的具体方法，主要包括：The following describes the specific method of measurement combined with the above-mentioned devices, mainly including:
标定步骤：在T
标时间内，将相对湿度为10％-100％的不同浓度的标气经标气进气管A后通过三通阀经常温管E或加热管D后进入紫外光度检测装置得到不同浓度对应的检测电压值V
标；在T
零时间内，将相对湿度为10％-100％的不同浓度的零气经零气进气管b后通过三通阀经常温管E或加热管D后进入紫外光度检测装置得到不同浓度对应的检测电压值V
零；从而得到气体浓度标定曲线：Q
标＝aV，其中，Q
臭氧(标)为标定状态下气体浓度；
Calibration steps: within the T calibration time, the calibration gas with a relative humidity of 10%-100% of different concentrations passes through the calibration gas inlet pipe A, then passes through the three-way valve constant temperature pipe E or heating pipe D, and then enters the ultraviolet photometric detection device to obtain The detection voltage value V corresponding to different concentrations is marked ; within T zero time, the zero gas of different concentrations with a relative humidity of 10%-100% passes through the zero gas inlet pipe b and then passes through the three-way valve constant temperature pipe E or heating pipe D After entering the ultraviolet photometric detection device to obtain the detection voltage value V zero corresponding to different concentrations; thereby obtaining the gas concentration calibration curve: Q mark =aV, wherein, Q ozone (mark) is the gas concentration under the calibration state;
测量步骤，包括：Measurement steps, including:
零气测量：将不含待测气成份的零气经零气进气管B后进入紫外光度检测装置得到当前浓度对应的检测电压值V
零(测)；
Zero gas measurement: the zero gas that does not contain the gas components to be measured is passed through the zero gas intake pipe B and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero (measurement) corresponding to the current concentration;
样气测量：将未知浓度的样气经样气进气管C后通过加热管D后进入紫外光度检测装置得到当前浓度对应的检测电压值V
样(测)，在本步骤中，臭氧经过加热后，转化为氧气，因此，经过加热后的样气不包含臭氧；将未知浓度的样气经样气进气管C后通过常温管E后进入紫外光度检测装置得到当前浓度对应的检测电压值V′
样(测)；
Sample gas measurement: the sample gas with unknown concentration passes through the sample gas inlet pipe C, then passes through the heating pipe D, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V sample (measurement) corresponding to the current concentration. In this step, the ozone is heated , converted into oxygen, therefore, the sample gas after heating does not contain ozone; the sample gas of unknown concentration passes through the sample gas inlet pipe C, then passes through the normal temperature pipe E, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V' corresponding to the current concentration sample (test) ;
浓度计算：臭氧浓度Q
臭＝a(V′
样(测)-V
样(测)-V
零(测))；VOC浓度Q
voc＝a(V
样(测)-V
零(测))。
Concentration calculation: ozone concentration Q odour =a(V'sample (test) -V sample (test) -V zero (test) ); VOC concentration Q voc =a(V sample (test) -V zero (test) ).
在本实施例中，三通阀每隔5秒回自动在加热管B和常温管E中来回切换，因此，在零气测量中，零气经零气进气管B后通过常温管E后进入紫外光度检测装置；在样气测量时，三通阀按设定的间隔时间切换加热管D和常温管E，使样气经公共管后自动进入加热管D或常温管E中。In this embodiment, the three-way valve automatically switches back and forth between the heating pipe B and the normal temperature pipe E every 5 seconds. Therefore, in the zero gas measurement, the zero gas passes through the zero gas inlet pipe B and then enters the normal temperature pipe E. Ultraviolet photometric detection device; when the sample gas is measured, the three-way valve switches the heating tube D and the normal temperature tube E according to the set interval time, so that the sample gas automatically enters the heating tube D or the normal temperature tube E after passing through the common tube.
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明 所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.
Claims (12)
- 一种基于差分法的臭氧及VOC含量检测系统，其特征在于，包括进气组件，所述进气组件包括用于标气的标气进气组件、用于零气的零气进气组件、用于样气的样气进气组件，标气进气组件、零气进气组件以及样气进气组件经过四通阀后与检测装置连接，所述检测装置包括臭氧加热装置以及与臭氧加热装置连接的紫外光度检测装置。A kind of ozone and VOC content detection system based on differential method, it is characterized in that, comprise air intake assembly, described air intake assembly comprises the calibration gas intake assembly for calibration gas, the zero air intake assembly for zero gas, The sample gas inlet assembly for sample gas, the standard gas inlet assembly, the zero gas inlet assembly and the sample gas inlet assembly are connected to the detection device after passing through the four-way valve. The detection device includes an ozone heating device and an ozone heating device. The ultraviolet photometric detection device connected to the device.
- 根据权利要求1所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，所述检测装置的紫外光度检测装置，包括气体检测气室，所述气体检测气室两端设有检测窗口，一端窗口设有紫外光源，另一端窗口设有信号接收检测组件，气体检测气室上端面的两端分别设有进气口和出气口。A kind of ozone and VOC content detection system based on differential method according to claim 1, it is characterized in that, the ultraviolet photometry detection device of described detection device comprises gas detection gas chamber, and described gas detection gas chamber two ends are provided with The detection window is equipped with an ultraviolet light source at one end of the window, and a signal receiving and detecting component at the other end of the window. The two ends of the upper end surface of the gas detection gas chamber are respectively equipped with an air inlet and an air outlet.
- 根据权利要求1所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，标气进气组件包括标气进气管A，样气进气组件包括样气进气管C，零气进气组件包括零气进气管B；检测装置还包括三通阀；四通阀经公共管与三通阀连接并经过加热管D与臭氧加热装置连接后与紫外光度检测装置连接；四通阀还经公共管与三通阀连接后经过常温管E与紫外光度检测装置连接。A kind of ozone and VOC content detection system based on differential method according to claim 1, it is characterized in that, standard gas inlet assembly comprises calibration gas inlet pipe A, sample gas inlet assembly includes sample gas inlet pipe C, zero gas The air intake assembly includes zero air intake pipe B; the detection device also includes a three-way valve; the four-way valve is connected to the three-way valve through a common pipe and connected to the ozone heating device through the heating pipe D, and then connected to the ultraviolet photometric detection device; the four-way valve It is also connected to the three-way valve through the common pipe and then connected to the ultraviolet photometric detection device through the normal temperature pipe E.
- 根据权利要求1所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，所述臭氧加热装置包括一个空心导热筒，样气进气管与三通阀连接后从空心导热筒外壁的一端螺旋缠绕至空心导热筒外壁的另一端后与紫外光检测装置的进气口连接，与加热控制器电连接的加热棒设置在空心导热筒内。A kind of ozone and VOC content detection system based on differential method according to claim 1, it is characterized in that, described ozone heating device comprises a hollow heat conduction cylinder, after the sample gas inlet pipe is connected with three-way valve, from the hollow heat conduction cylinder outer wall One end of the tube is spirally wound to the other end of the outer wall of the hollow heat-conducting cylinder and then connected to the air inlet of the ultraviolet light detection device, and the heating rod electrically connected to the heating controller is arranged in the hollow heat-conducting cylinder.
- 根据权利要求2所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，信号接收检测组件包括紫外光接收器以及与紫外光接收器连接的传感器模块。The ozone and VOC content detection system based on the differential method according to claim 2, wherein the signal receiving and detecting component includes an ultraviolet light receiver and a sensor module connected with the ultraviolet light receiver.
- 根据权利要求5所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，所述紫外光接收器和另一端窗口之间还设有滤光片。A kind of ozone and VOC content detection system based on differential method according to claim 5, it is characterized in that, also be provided with filter between described ultraviolet receiver and the other end window.
- 根据权利要求1所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，所述臭氧加热装置还包括一个保护套，将螺旋缠绕在空心导热筒外壁的部分样气进气管包裹在保护套内。The ozone and VOC content detection system based on the differential method according to claim 1, wherein the ozone heating device also includes a protective cover, which wraps a part of the sample gas inlet pipe that is spirally wound on the outer wall of the hollow heat conducting cylinder Inside the protective case.
- 根据权利要求1所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，还包括气体降温及恒温组件，设置在臭氧加热装置和紫外光度检测装置之间，用于将加热处理后的样气降温至室温或设定的温度并保持恒温状态后输送至紫外光度检测装置内。A kind of ozone and VOC content detection system based on differential method according to claim 1, is characterized in that, also comprises gas cooling and constant temperature component, is arranged between ozone heating device and ultraviolet photometric detection device, is used for heat treatment The final sample gas is cooled to room temperature or the set temperature and kept at a constant temperature before being transported to the ultraviolet photometric detection device.
- 根据权利要求1所述的一种基于差分法的臭氧及VOC含量检测系统，其特征在于，紫外光度检测装置还包括螺旋缠绕在气体检测气室外壁的加热丝，所述加热丝外包括有保温层。The ozone and VOC content detection system based on the differential method according to claim 1, wherein the ultraviolet photometric detection device also includes a heating wire spirally wound on the outer wall of the gas detection gas, and the heating wire includes a thermal insulation Floor.
- 一种基于差分法的臭氧及VOC含量检测方法，其特征在于，包括：A kind of ozone and VOC content detection method based on difference method, it is characterized in that, comprising:标定步骤：将不同浓度的标气经标气进气管A后进入紫外光度检测装置得到不同浓度对应的检测电压值V 标；将不同浓度的零气经零气进气管B后进入紫外光度检测装置得到不同浓度对应的检测电压值V 零；从而得到气体浓度标定曲线：Q 标＝aV，其中，Q 臭氧(标)为标定状态下气体浓度，a为标定系数； Calibration steps: put the calibration gas of different concentrations into the ultraviolet photometric detection device through the calibration gas inlet pipe A to obtain the detection voltage value V standard corresponding to different concentrations; put the zero gas of different concentrations into the ultraviolet photometric detection device through the zero gas inlet pipe B Obtain the detection voltage value V zero corresponding to different concentrations; thereby obtain the gas concentration calibration curve: Q standard =aV, wherein, Q ozone (standard) is the gas concentration under the calibration state, and a is the calibration coefficient;测量步骤，包括：Measurement steps, including:零气测量：将不含待测气成份的零气经零气进气管B后进入紫外光度检测装置得到当前浓度对应的检测电压值V 零(测)； Zero gas measurement: the zero gas that does not contain the gas components to be measured is passed through the zero gas intake pipe B and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero (measurement) corresponding to the current concentration;样气测量：将未知浓度的样气经样气进气管C后通过加热管D后进入紫外光度检测装置得到当前浓度对应的检测电压值V 样(测)；将未知浓度的样气经样气进气管C后通过常温管E后进入紫外光度检测装置得到当前浓度对应的检测电压值V′ 样(测)； Sample gas measurement: pass the sample gas of unknown concentration through the sample gas inlet pipe C and enter the ultraviolet photometric detection device after passing through the heating tube D to obtain the detection voltage value V sample (measurement) corresponding to the current concentration; pass the sample gas of unknown concentration through the sample gas After the intake pipe C, enter the ultraviolet photometric detection device to obtain the detection voltage value V ' sample (testing) corresponding to the current concentration after passing through the normal temperature pipe E;浓度计算：臭氧浓度Q 臭＝a(V′ 样(测)-V 样(测)-V 零(测))；VOC浓度Q voc＝a(V 样(测)-V 零(测))。 Concentration calculation: ozone concentration Q odour =a(V'sample (test) -V sample (test) -V zero (test) ); VOC concentration Q voc =a(V sample (test) -V zero (test) ).
- 根据权利要求10所述的一种基于差分法的臭氧及VOC含量检测方法，其特征在于，标定步骤的具体过程是：在T 标时间内，将相对湿度为10％-100％的不同浓度的标气经标气进气管A后通过三通阀经常温管E或加热管D后进入紫外光度检测装置得到不同浓度对应的检测电压值V 标；在T 零时间内，将相对湿度为10％-100％的不同浓度的零气经零气进气管b后通过三通阀经常温管E或加热管D后进入紫外光度检测装置得到不同浓度对应的检测电压值V 零；从而得到气体浓度标定曲线：Q 标＝aV，其中，Q 臭氧(标)为标定状态下气体浓度。 A kind of ozone and VOC content detection method based on difference method according to claim 10, it is characterized in that, the specific process of calibration step is: within the time of T marking , the relative humidity is 10%-100% different concentrations After the standard gas passes through the standard gas inlet pipe A, it passes through the three-way valve, the constant temperature pipe E or the heating pipe D, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V standard corresponding to different concentrations; within T zero time, the relative humidity is 10%. -100% zero gas with different concentrations passes through the zero gas intake pipe b, then passes through the three-way valve, constant temperature pipe E or heating pipe D, and then enters the ultraviolet photometric detection device to obtain the detection voltage value V zero corresponding to different concentrations; thereby obtaining the gas concentration calibration Curve: Q standard = aV, wherein, Q ozone (standard) is the gas concentration in the calibration state.
- 根据权利要求10所述的一种基于差分法的臭氧及VOC含量检测方法，其特征在于，零气测量中，零气经零气进气管B后通过常温管E后进入紫外光度检测装置；样气测量时，三通阀按设定的间隔时间切换加热管D和常温管E，使样气经公共管后自动进入加热管D或常温管E中。A kind of ozone and VOC content detection method based on differential method according to claim 10, it is characterized in that, in the zero gas measurement, zero gas enters the ultraviolet photometric detection device after passing through the normal temperature tube E after the zero gas inlet pipe B; During gas measurement, the three-way valve switches the heating pipe D and the normal temperature pipe E according to the set interval time, so that the sample gas automatically enters the heating pipe D or the normal temperature pipe E after passing through the common pipe.
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