KR810001203Y1 - Measuring device for hydrocarbon - Google Patents
Measuring device for hydrocarbon Download PDFInfo
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- KR810001203Y1 KR810001203Y1 KR7707404U KR770007404U KR810001203Y1 KR 810001203 Y1 KR810001203 Y1 KR 810001203Y1 KR 7707404 U KR7707404 U KR 7707404U KR 770007404 U KR770007404 U KR 770007404U KR 810001203 Y1 KR810001203 Y1 KR 810001203Y1
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Abstract
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Description
제1도는 종래의 샘플가스가 대기의 경우의 논메탄 탄화수소 측정장치를 표시한 설명도.1 is an explanatory diagram showing a non-methane hydrocarbon measuring device when the conventional sample gas is the atmosphere.
제2,3도는 본 고안에 관한 샘플가스가 자동차 배기가스의 경우의 논메탄 탄화수소 측정장치를 표시한 설명도.2 and 3 are explanatory diagrams showing a non-methane hydrocarbon measuring device when the sample gas according to the present invention is an automobile exhaust gas.
제4도는 산소농도와 C2H6및 CH4의 연소효율의 관계를 표시한 그래프.4 is a graph showing the relationship between oxygen concentration and combustion efficiency of C 2 H 6 and CH 4 .
본 고안은 자동차 배기가스중의 논메탄 탄화수소 측정장치에 관한 것이다.The present invention relates to an apparatus for measuring non-methane hydrocarbons in automobile exhaust gas.
종래 자동차 배기가스는, 전(全)탄화수소 농도로 규제가 되고 있으나, 배기가스중에 존재하는 메탄이 광화학(光化學)스모그에 무관계이므로, 전탄화수소에서 메탄을 제외한 논메탄 탄화수소 농도로 규제하는 방향에 있다.Conventionally, automobile exhaust gas is regulated by the total hydrocarbon concentration, but since methane present in the exhaust gas is irrelevant to photochemical smog, it is necessary to regulate the non-methane hydrocarbon concentration in all hydrocarbons except methane. have.
논메탄 측정법으로써는, 가스크로마그라피법에 의해 메탄을 분리하는 방법과 메탄의 연소온도가 다른 탄화수소 보다 높을 것을 이용한 선택 연소법이 있다.Non-methane measurement methods include a method of separating methane by gas chromatography and a selective combustion method in which the combustion temperature of methane is higher than that of other hydrocarbons.
그러나 전자는 장치가 고가이고, 본질적으로 배취 측정이므로, 실제의 검정작업에는 적합하지 않다.However, the former is not suitable for the actual assay because the device is expensive and essentially batch measurement.
한편 선택연소법은 메탄이외의 탄화수소를 반응기로 선택적으로 연소시켜, 메탄만을 수소염(炎) 이온화검출기(이하 FID라 칭한다)로 검출하고, 한편 미처리의 샘플가스를 FID에 보내, 전탄화수소를 검출하고, 양자의 차에 의해 논메탄 탄화수소 농도를 아는 방법이고, 가스그로마토그라피법에 비해서 염가이고 또한 연속 측정이 가능하다.On the other hand, the selective combustion method selectively burns hydrocarbons other than methane in a reactor, detects only methane with a hydrogen salt ionization detector (hereinafter referred to as FID), and sends untreated sample gas to the FID to detect all hydrocarbons. It is a method of knowing a nonmethane hydrocarbon concentration by the difference of both, and it is cheap compared with gas chromatography method, and continuous measurement is possible.
그러나, 자동차 배기가스를 직접법에 의해 측정할 경우는, 종래의 샘플가스가 대기에 있었던 장치를 그대로 적용할수는 없다.However, when the automobile exhaust gas is measured by the direct method, the apparatus in which the conventional sample gas is in the atmosphere cannot be applied as it is.
왜냐하면 선택연소법에서는 상기한 바와 같이, 반응기로 메탄 이외의 탄화수소를 연소하므로, 산소가 필요하고, 샘플가스가 대기의 경우와 다르고, 자동차 배기가스의 경우, 공연비(空燃比)가 릿치측으로 되면, 산소 농도가 낮고 연소가 불완전하게 되고 측정오차로서 나타나기 때문이다.In the selective combustion method, as described above, since hydrocarbons other than methane are combusted in the reactor, oxygen is required, and the sample gas is different from that in the atmosphere. This is because the concentration is low, the combustion is incomplete and appears as a measurement error.
본 고안은 이점을 해소하기 위해 샘플가스에 일정비율로 산소를 공급하는 구성으로 한것이고, 자동차의 광범위한 공연비의 변화에 무관계로 안정된 정도(精度)를 갖는 논메탄 탄화수소 측정장치를 제공하기 위한 것이다.The present invention is to provide a sample to supply oxygen at a constant rate to solve the advantages, and to provide a non-methane hydrocarbon measuring device having a stable degree irrespective of changes in the wide air-fuel ratio of the vehicle.
다음, 도면에 따라 구체적으로 설명한다.Next, it demonstrates concretely according to drawing.
제1도는 종래의 대기를 샘플가스로 하는 경우의 후로오시이트이고 정량펌프(1)에 의해 샘플가스입구(2)에서 샘프링된 대기의 일부는 제2샘플가스유로(流路)(3)에 보내져, 변(4)을 통해, 반응기(5)에서 메탄이외의 탄화수소는 연소되고, 제2FID(6)에기 메탄농도가 측정된다.FIG. 1 is a flow sheet in the case of using the conventional atmosphere as the sample gas, and a part of the atmosphere sampled at the sample gas inlet 2 by the metering pump 1 is transferred to the second sample gas flow path 3. Through the side 4, hydrocarbons other than methane are combusted in the reactor 5, and methane concentration is measured in the second FID 6.
한편 샘프링된 대기의 나머지는 제1샘프링가스유로(7)에 보내져, 변(8), 가스류(流) 저항조절부(9)를 통하고, 제1FID(10)에서 전탄화수소 농도가 측정된다.On the other hand, the remainder of the sampled atmosphere is sent to the first sampling gas flow path (7), through the side (8), the gas flow resistance control unit (9), the total hydrocarbon concentration in the first FID (10) Is measured.
여기서 변(8),(4)은 제1,제2샘플가스유로에 보내지는 대기의 유량을 동일하게 하기 위한 것이고, 가스류 저항조절부(9)는 양검출기(6),(10)의 동작개시를 동일하게 하기 위한것, 즉 샘플가스입구에서 샘플된 대기를 동시에 양검출기(6),(10)로 검출하기 위한 것이다.In this case, the sides 8 and 4 are for equalizing the flow rate of the air sent to the first and second sample gas flow paths, and the gas flow resistance adjusting unit 9 is used for the detection of both the detectors 6 and 10. In order to make the operation start to be the same, that is, to detect the atmosphere sampled at the sample gas inlet by both detectors 6 and 10 at the same time.
이것은 후술하는 감산(減算)처리에 대하여 필요한 것이다. 상기 양검출기에서의 신호는 감산기(11)로 감산되고 메탄탄화수소 농도에 대응되는 신호로 되어서, 지시계(12)로 지시된다.This is necessary for the subtraction process described later. The signal in both detectors is subtracted by the subtractor 11 and becomes a signal corresponding to the methane hydrocarbon concentration, which is indicated by the indicator 12.
또한(13)은 교정(校正)가스유로이고, 교정시에 삼방향전자변(14)이 절환되어 제로가스입구(15)나 스판가스입구(16)에서 제로가스 또는 스판가스가 공급된다.In addition, 13 is a calibration gas flow path, the three-way electromagnetic valve 14 is switched at the time of calibration, and zero gas or span gas is supplied from the zero gas inlet 15 or the span gas inlet 16.
그 절환은 전자변(17)으로 한다.The switching is made to the electron valve 17.
제2도는 본 고안에 관한 일실시예이다.2 is an embodiment of the present invention.
샘프링가스가 자동차 배기가스의 경우 공연비가 릿치측으로 되면 산소량이 적고 반응기(5)로 연소가 완전히 되지 않고, 측정 오차로 된다.When the sampling gas is an automobile exhaust gas, when the air-fuel ratio reaches the rich side, the amount of oxygen is small and combustion is not completely completed in the reactor 5, resulting in a measurement error.
이것을 방지하기 위해 제2샘플가스유로(3)에 산소가스유로(18)가 접속되고, 자동차 배기가스에 산소를 혼합한후 반응기에 보내지는 구조로 되어 있고, 산소는 산소통(19)을 나온후, 레규레이터(20), 압력계(21), 모세관(22)으로 되는 유량조절기를 지난후, 제2샘플 가스유로(3)를 흐르는 자동차 배기가스와 혼합된다.In order to prevent this, an oxygen gas flow path 18 is connected to the second sample gas flow path 3, and after the oxygen is mixed with the automobile exhaust gas, the oxygen gas flow path 18 is sent to the reactor. After passing through the flow regulators consisting of the regulator 20, the pressure gauge 21, and the capillary tube 22, they are mixed with the vehicle exhaust gas flowing through the second sample gas flow passage 3.
산소공급원으로서는 대기를 사용하는 것도 가능하다.It is also possible to use the atmosphere as an oxygen supply source.
또한, 제1도와 동일한 번호의 것은 동일부품을 표시하고 있다. 제3도는 본 고안의 다른 실시예이고 배압(背壓) 레규레이터(23), 모세관(24),(25)에 의해 유량조절이 보다 정확히 되어 있다.In addition, the same numbers as those in FIG. 1 denote the same parts. 3 is another embodiment of the present invention, and the flow rate is more precisely controlled by the back pressure regulator 23, the capillaries 24, 25.
또한 제1도와 동일한 번호의 것은 동일 부품을 표시하고 있다. 본 고안에 있어서는 산소의 혼합 비율을 계속 일정하게 하여 두면, 그 혼합 비율로 교정되기 때문에 정확한 혼합 비율은 몰라도 된다. 단, 제4도에서 아는 바와 같이 산소농도가 15% 이상으로 되게금할 필요는 있다.The same numerals in FIG. 1 indicate the same parts. In the present invention, if the mixing ratio of oxygen is kept constant, the mixing ratio is corrected so that the exact mixing ratio may not be known. However, as shown in FIG. 4, it is necessary to prevent the oxygen concentration to be 15% or more.
제4도에 있어서 횡축(橫軸)은 산소농도, 종축은 연소효율을 나타내고 있고 곡선(26)은 C2H610000ppm-c, 곡선(27)은 CH410000ppm-c의 산화 효율을 표시하고 있다.In Figure 4, the horizontal axis represents oxygen concentration, the vertical axis represents combustion efficiency, curve 26 represents C 2 H 6 10000 ppm-c, and curve 27 represents oxidation efficiency of CH 4 10000 ppm-c. have.
C2H6이외의 탄화수소는 보다 연소되기 쉬우므로, C2H6및 CH4와의 분리를 생각하면 좋다.Hydrocarbons other than C 2 H 6 are more likely to be combusted, so that separation from C 2 H 6 and CH 4 may be considered.
또한 촉매로서는 동(董), 망간의 산화물이나 백금, 파라디움등이 사용되고 있으나 제4도의 경우는 촉매로서 호프카라이트(주로 동, 망간의 산화물)를 사용 하였다.In addition, copper, manganese oxide, platinum, and palladium are used as catalysts, but in the case of FIG.
이상과 같이 본 고안에 있어서는 직접법에 의해 샘프링된 자동차 배기가스에 일정량의 산소를 혼합한후 반응기에 보내는 것에 의해 반응기를 안정되게 작동 시킬수가 있고, 정도(精度)좋게 자동차 배기가스중의 논메탄 탄화수소 농도를 측정할수가 있다.As described above, according to the present invention, the reactor can be stably operated by mixing a predetermined amount of oxygen with the automobile exhaust gas sampled by the direct method and sending it to the reactor, and the nonmethane in the automobile exhaust gas is precisely accurate. Hydrocarbon concentration can be measured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR7707404U KR810001203Y1 (en) | 1977-12-26 | 1977-12-26 | Measuring device for hydrocarbon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR7707404U KR810001203Y1 (en) | 1977-12-26 | 1977-12-26 | Measuring device for hydrocarbon |
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| KR810001203Y1 true KR810001203Y1 (en) | 1981-09-19 |
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| KR7707404U KR810001203Y1 (en) | 1977-12-26 | 1977-12-26 | Measuring device for hydrocarbon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147671A (en) * | 2023-10-30 | 2023-12-01 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on dilution technology |
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1977
- 1977-12-26 KR KR7707404U patent/KR810001203Y1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147671A (en) * | 2023-10-30 | 2023-12-01 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on dilution technology |
| CN117147671B (en) * | 2023-10-30 | 2024-02-06 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on dilution technology |
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