KR20000010711A - Method and device for measuring oxide material out of hydrogenous liquid - Google Patents
Method and device for measuring oxide material out of hydrogenous liquid Download PDFInfo
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- KR20000010711A KR20000010711A KR1019980708812A KR19980708812A KR20000010711A KR 20000010711 A KR20000010711 A KR 20000010711A KR 1019980708812 A KR1019980708812 A KR 1019980708812A KR 19980708812 A KR19980708812 A KR 19980708812A KR 20000010711 A KR20000010711 A KR 20000010711A
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- 239000007788 liquid Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 title claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 239000000567 combustion gas Substances 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000012159 carrier gas Substances 0.000 abstract description 11
- 239000002351 wastewater Substances 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1826—Water organic contamination in water
- G01N33/1846—Total carbon analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
-
- 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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1886—Water using probes, e.g. submersible probes, buoys
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/02—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
- G01N7/06—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder by combustion alone
Abstract
Description
전술한 방법의 중요한 용도는 폐수 중의 탄소 함량 및/또는 질소 함량을 측정하는 것이다. 산화성 물질은 일반적으로 하기와 같이 표시한다:An important use of the aforementioned method is to determine the carbon content and / or nitrogen content in the waste water. Oxidizing substances are generally indicated as follows:
TC (Total Carbon): 수성 액체 중에 함유된 총 탄소;TC (Total Carbon): total carbon contained in the aqueous liquid;
TOC (Total Organic Carbon): 수성 액체 중에 유기 화합물의 형태로 함유된 총 탄소;TOC (Total Organic Carbon): Total carbon contained in the form of an organic compound in an aqueous liquid;
TIC (Total Inorganic Carbon): 수성 액체 중에 무기 화합물의 형태로 함유된 총 탄소;TIC (Total Inorganic Carbon): Total carbon contained in the form of an inorganic compound in an aqueous liquid;
TN (Tatal Nitrogen): 수성 액체 중에 함유된 총 질소.TN (Tatal Nitrogen): Total nitrogen contained in the aqueous liquid.
에프. 에렌버거의 논문 "Zur Bestimmung von Sauerstoffbedarfs- und Kohlenstoff-Kennzahlen in der Wasserqualitaetsbestimmung", GIT Fachz. Lab. 23 Jg 8/79, 페이지 738-747에는 유기 물질의 습식 화학적 또는 열적 변환 및 양적 산화에 의하여 TOC를 측정하는 여러 가지 방법이 기재되어 있다.F. Erenberger's paper "Zur Bestimmung von Sauerstoffbedarfs- und Kohlenstoff-Kennzahlen in der Wasserqualitaetsbestimmung", GIT Fachz. Lab. 23 Jg 8/79, pages 738-747, describes various methods for measuring TOC by wet chemical or thermal conversion and quantitative oxidation of organic materials.
전술한 바와 같은 공지의 방법에서는 액체 샘플을 마이크로필터로 여과하여 100-200μm 이상의 큰 입자들을 분리하도록 되었다. 액체 샘플의 TOC를 측정할 때는 필요에 따라 무기 화합물을 분리하기 위한 중간 처리를 한 후에 액체 샘플을 연소로에 공급하고 가열하여 유기물질을 이산화탄소(CO2)로 변화시킨다. 발생된 이산화탄소는 일반적으로 필요한 연소 산소를 공급하는 운반 가스에 의하여 수분을 분리하기 위한 응축기, 가스 필터 및 적외선 평가장치로 공급된다. 연소시 발행하는 이산화탄소는 적외선 측정에 의하여 측정되며, 이 측정치로부터 TOC가 계산된다.In the known method as described above, the liquid sample is filtered through a microfilter to separate large particles of 100-200 μm or more. When measuring the TOC of the liquid sample, if necessary, an intermediate treatment for separating the inorganic compound is followed by supplying the liquid sample to the combustion furnace and heating to change the organic material into carbon dioxide (CO 2 ). The carbon dioxide generated is generally fed to a condenser, gas filter and infrared evaluation device for separating water by means of a carrier gas supplying the necessary combustion oxygen. Carbon dioxide emitted during combustion is measured by infrared measurement, from which the TOC is calculated.
전술한 방법에서 액체 샘플은 그 부피가 단위 시간 또는 개별 샘플 당 20-100μl로 되도록 극히 적은 량을 사용하고 있다. 미량의 샘플을 공급하기 위하여는 공급관이 극히 작은 구경을 갖고 있어야 하므로 액체 샘플을 공급하는데 장시간이 소요되었다.In the method described above, the liquid sample uses an extremely small amount so that its volume is 20-100 μl per unit time or individual sample. In order to supply a small amount of sample, the supply tube had to have a very small diameter, so it took a long time to supply a liquid sample.
촉매를 사용하지 않으면서 TOC를 측정하기 위한 또 다른 공지의 방법(게베하-물/폐수 120 (1979) H. 5)은 높은 온도(1100 내지 1200℃)를 필요로 하고 노 내에서의 유지 시간도 장시간을 필요로 한다. 그러나, 노 내에서의 유지 시간을 길게 유지하기 위하여는 노를 크게 형성하여야 하므로 시설비의 문제가 있고 처리시간도 길어진다는 문제점이 있다. 공지된 방법에서는 샘플을 노에서 배출한 다음 적외선 측정장치에서 측정하기 전에 캐리어 가스와 혼합하여 연소로를 통과시킬 때 안내판(차단판)을 이용하여 여러 번 노 내부의 가장 뜨거운 구역을 통과하도록 유도함으로써 동일한 효과를 얻으려고 시도하였다.Another known method for measuring TOC without using a catalyst (Gebeha-water / wastewater 120 (1979) H. 5) requires high temperatures (1100 to 1200 ° C.) and retention time in the furnace. It also requires a long time. However, in order to maintain a long holding time in the furnace, a large furnace must be formed, which causes a problem of facility cost and a long processing time. In known methods, the sample is discharged from the furnace and then mixed with a carrier gas before passing through the furnace to guide the furnace through the hottest zone several times using a guide plate (blocking plate). Tried to achieve the same effect.
샘플은 캐리어 가스 및/또는 미세 분사장치에 의하여 노 내로 유입되도록 되었다. 이 경우에는 다음과 같은 문제점이 있다.Samples were allowed to enter the furnace by carrier gas and / or microinjectors. In this case, there are the following problems.
샘플 부피는 분 당 또는 개별 샘플 당 20-100μl로 극히 적어야 하고, 샘플은 캐리어 가스와 함께 연소로에 분사되어야 한다. 캐리어 가스는 연소에 의하여 발생하는 CO2가스를 연소로로부터 적외선 측정장치까지 운반하는데, 이러한 캐리어 가스의 량은 연소로에서 CO2-치환 시간을 결정하므로 TC, TOC 등을 검출하는 CO2의 결과 신호를 감소시킨다.The sample volume should be extremely low, 20-100 μl per minute or per individual sample, and the sample should be injected into the furnace with the carrier gas. The carrier gas carries CO 2 gas generated by combustion from the combustion furnace to the infrared measuring device. The amount of carrier gas determines the CO 2 -substitution time in the combustion furnace, and thus the result of CO 2 detecting TC, TOC, etc. Reduce the signal
전술한 조건하에서 폐수 샘플을 연소로내로 양호하게 공급하기 위하여는 샘플이 미세한 노즐을 갖는 기계장치에 의하여 높은 에너지로 연소로내로 공급되거나, 또는 액체 샘플이 캐리어 가스에 의하여 매우 미세한 노즐(매우 작은 횡단면을 가진 노즐)을 통해 연소로내에 분사되어야 한다.In order to ensure a good supply of wastewater samples into the furnace under the above-mentioned conditions, the sample may be fed into the furnace at high energy by a mechanism having a fine nozzle, or the liquid sample may be a very fine nozzle (a very small cross section by a carrier gas). Must be injected into the furnace through a nozzle with
전술한 조건으로 액체 샘플을 공급할 때 사용하는 분사 노즐은 매우 작은 직경(50-250μm)을 갖고 있으므로 작업 중 분사 노즐이 쉽게 폐쇄될수 있다. 반면, 직경이 큰 노즐을 사용하는 경우에는 혼합물이 충분한 에너지로 연소로에 분사되도록 하기 위하여 많은 캐리어 가스가 사용되어야 한다. 이와 같이 다량의 캐리어 가스를 사용하는 경우에는 CO2의 결과 신호가 감소된다.The spray nozzles used to supply liquid samples under the above-mentioned conditions have very small diameters (50-250 μm) so that the spray nozzles can be easily closed during operation. On the other hand, when using a large diameter nozzle, many carrier gases must be used to inject the mixture into the furnace with sufficient energy. As such, when a large amount of carrier gas is used, the resultant signal of CO 2 is reduced.
본 발명은 액체 샘플을 연소로에 공급하고 가열하여, 산화성 물질을 연소시켜 가스상 산화물로 얻고, 얻어진 배출 가스의 샘플로부터 적외선 측정에 의하여 가스상 산화물의 함량을 측정하는 수성 액체 중의 산화성 물질의 함량을 측정하는 방법에 관한 것이다.The present invention supplies a liquid sample to a combustion furnace and heats it to burn an oxidizing substance to obtain a gaseous oxide, and to measure the content of the oxidizing substance in an aqueous liquid which measures the content of the gaseous oxide by infrared measurement from a sample of the obtained exhaust gas. It is about how to.
도 1은 본 발명에 사용되는 장치의 한 예를 개략적으로 도시한 종단면도이다.1 is a longitudinal sectional view schematically showing an example of an apparatus used in the present invention.
본 발명의 목적은 캐리어 가스를 사용하지 않고 작은 직경의 공급관 사용에 따른 공급관 폐쇄의 위험이 없이 정확한 측정에 필요한 최소량의 샘플을 간단하게 연소로내로 공급할수 있는 방법을 제공하는 것이다.It is an object of the present invention to provide a method in which the minimum amount of samples necessary for accurate measurement can be simply fed into a furnace without the use of carrier gas and the risk of supply tube closure due to the use of small diameter feed tubes.
전술한 본 발명의 목적은 액체 샘플을 연소로 내로 공급하여 연소로 내에 위치하는 가열 표면에 묻도록 한 다음, 액체샘플을 연소로로부터 배출하고 연소로를 폐쇄하여 가열 표면에 묻은 액체 샘플을 증발시킴과 동시에 산화성 성분을 연소시켜 적외선 측정에 공급되는 배출 가스 샘플을 얻고, 증발 시 발생하는 연소로 내의 압력 상승 또는 가스 중의 습도 상승을 측정하여 이 측정치로부터 샘플 량을 계산하여 두 측정치로부터 액체 샘플 중의 산화성 물질의 량을 계산하도록 된 본 발명의 방법에 의하여 달성된다.The object of the present invention described above is to feed a liquid sample into the furnace to bury it on a heating surface located within the furnace, then discharge the liquid sample from the furnace and close the furnace to evaporate the liquid sample on the heating surface. At the same time, the oxidizing component is combusted to obtain an exhaust gas sample supplied for infrared measurement, and the pressure increase in the combustion furnace or the humidity rise in the gas generated during evaporation is measured, and the sample amount is calculated from the measured values to determine the oxidative properties in the liquid sample from the two measured values. It is achieved by the method of the invention adapted to calculate the amount of substance.
정확한 측정에 필요한 최소량의 액체 샘플을 분리하는 것은 액체시료가 가열 표면에 적셔진 후 가열 표면에 묻은 상태로 유지되도록 하는 간단한 방법에 의하여 이루어진다. 전술한 액체 샘플의 부피는 증발 시 발생하는 압력 상승 또는 습도 상승을 측정함으로써 매우 간단한 방법으로 정확하게 측정된다. 즉, 액체의 량은 전술한 압력 상승 또는 습도 상승에 대한 측정치로부터 간단한 계산에 의하여 얻어진다.Separating the minimum amount of liquid sample necessary for accurate measurement is accomplished by a simple method that allows the liquid sample to remain on the heating surface after it has been soaked on the heating surface. The volume of the liquid sample described above is accurately measured in a very simple way by measuring the pressure rise or humidity rise that occurs upon evaporation. That is, the amount of liquid is obtained by simple calculation from the above-mentioned measurement of pressure rise or humidity rise.
미량의 액체 샘플을 분리시키는 것은 액체 샘플을 연소로 내로 공급하여 액체 샘플이 가열 표면에 묻도록 한 다음 연소로 내로 가스를 주입하여 가스 압력으로 연소로 내의 액체 샘플이 배출되도록 하는 간단한 방법에 의하여 달성된다. 액체 시료를 배출시켰을 때 연소로의 벽에 액체 샘플이 묻어 있으나 가열기에 묻은 액체의 증발을 위한 가열이 단시간 내에 이루어지므로 벽에 묻은 액체는 증발하지 않게 되어 압력상승이나 수분 함량에 영향을 미치지 아니하므로 수분함량을 계산하는데 영향을 미치지 아니한다.Separation of trace liquid samples is accomplished by a simple method of supplying a liquid sample into the furnace to bury the liquid sample on the heating surface and then injecting gas into the furnace to discharge the liquid sample in the furnace at gas pressure. do. When the liquid sample is discharged, the liquid sample is attached to the wall of the furnace, but since the heating for evaporation of the liquid on the heater is performed within a short time, the liquid on the wall does not evaporate and does not affect the pressure rise or the moisture content. It does not affect the calculation of moisture content.
전술한 방법에 사용하는데 적당한 본 발명의 장치는 연소로가 밀폐할 수 있는 노 챔버를 포함하고, 가열기가 챔버 내로 돌출되게 연장되도록 설치되었으며, 연소로에 연결된 압력 측정 장치와 적외선 측정장치를 포함한다.Apparatus of the present invention suitable for use in the method described above includes a furnace chamber in which the furnace can be sealed, a heater is installed to protrude into the chamber, and includes a pressure measuring device and an infrared measuring device connected to the furnace. .
본 발명의 바람직한 실시예는 청구범위 종속항에 기재한다.Preferred embodiments of the invention are described in the dependent claims.
이하 본 발명의 한 예를 도면에 의하여 상세하게 설명한다.Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
도 1은 수성 액체 중의 산화성 물질의 함량, 특히 폐수 중의 탄소 또는 질소의 함량을 측정하기 위한 본 발명에 의한 액체 샘플 중의 산화성 물질을 측정하는 장치의 한 예를 보인 종단면도이다. 본 발명에 의한 측정장치는 분석하려는 폐수 내로 삽입되는 측정 부표(2)를 갖고 있으며, 이 측정 부표(2) 내에 샘플 챔버(1)가 형성되었다. 샘플 챔버(1)는 챔버 바닥(3)에 밸브(4)에 의해 개폐될 수 있는 주입구(5)를 갖고 있다. 측정 부표(2)에는 산소 및/또는 CO2-없는 가스를 챔버(1) 내로 공급하는 샘플 챔버(1)내로 연장된 가스 공급관(7)과 가스 유입 밸브(6)가 설치되었으며, 압력 측정 장치인 압력 게이지(8)가 샘플 챔버(1) 내부의 압력을 측정할수 있도록 설치되었다. 본 발명의 장치에는 전술한 압력측정 장치 대신에 습도 측정장치가 설치될수도 있다. 또한 측정 부표(2)에는 샘플 챔버(2) 내로 분석할 폐수가 유입될 때 폐수의 유입이 용이하게 이루어지도록 챔버(2) 상단부의 가스를 배출시키는 가스 배출 밸브(9)가 설치되고, 폐수를 가열하여 산화시키는 전열선으로 구성된 가열기(10)가 샘플 챔버(1) 내부로 돌출되게 설치되었으며, pH-값을 조정하기 위한 산을 첨가하는 산 공급 장치(11)도 설치되었다.1 is a longitudinal sectional view showing an example of an apparatus for measuring an oxidizing substance in a liquid sample according to the present invention for measuring the content of an oxidizing substance in an aqueous liquid, in particular carbon or nitrogen in waste water. The measuring device according to the invention has a measuring buoy 2 inserted into the wastewater to be analyzed, in which a sample chamber 1 is formed. The sample chamber 1 has an inlet 5 that can be opened and closed by a valve 4 on the chamber bottom 3. The measurement buoy 2 is provided with a gas supply line 7 and a gas inlet valve 6 extending into the sample chamber 1 for supplying oxygen and / or CO 2 -free gas into the chamber 1. A pressure gauge 8 was installed to measure the pressure inside the sample chamber 1. The humidity measuring device may be installed in the device of the present invention instead of the pressure measuring device described above. In addition, the measurement buoy (2) is provided with a gas discharge valve (9) for discharging gas at the upper end of the chamber (2) to facilitate the inflow of wastewater when the wastewater to be analyzed into the sample chamber (2), A heater 10 composed of a heating wire for heating and oxidizing was installed to protrude into the sample chamber 1, and an acid supply device 11 for adding an acid for adjusting pH-value was also installed.
샘플 챔버(1)는 분석할 샘플인 폐수가 채워지는 반응실 또는 연소로로 이용된다. 분석할 샘플인 폐수는 밸브(4) 및 가스 배출 밸브(9)의 개방시 측정 부표(2)를 둘러싸는 폐수의 유체 정압에 의해 주입구(5)를 통해 샘플 챔버(1)내로 유입되어 일정한 높이까지 샘플 챔버(1)내에 채워진다. 폐수가 샘플 챔버(1) 내에 설치된 가열기(1)의 표면에 묻을 정도로 채워진 다음에는 밸브(4)를 폐쇄하고, 이어서 산 공급 장치(11)로 산을 첨가하여 폐수의 pH를 2-3 정도로 되게 조정하고, 가스 유입 밸브(6)를 통하여 샘플 챔버(1)에 가스를 공급한다.The sample chamber 1 is used as a reaction chamber or a combustion furnace in which wastewater, which is a sample to be analyzed, is filled. The waste water, which is a sample to be analyzed, is introduced into the sample chamber 1 through the inlet 5 by the constant pressure of the fluid of the waste water surrounding the measurement buoy 2 upon opening of the valve 4 and the gas discharge valve 9 and is of constant height. Until it is filled in the sample chamber (1). After the wastewater is filled to the surface of the heater 1 installed in the sample chamber 1, the valve 4 is closed, and then acid is added to the acid supply device 11 so that the pH of the wastewater is about 2-3. The gas is supplied to the sample chamber 1 through the gas inlet valve 6.
이 때 밸브(4)를 개방하면 주입되는 가스 압력에 의하여 샘플 챔버(1) 내의 액체 샘플이 주입구(5)를 통해 배출되는데, 샘플 챔버(1)내의 폐수가 모두 배출되었을 때 챔버 바닥(3)의 밸브(4)와 가스 유입 밸브(6)를 폐쇄시킨다.At this time, when the valve 4 is opened, the liquid sample in the sample chamber 1 is discharged through the inlet port 5 by the gas pressure injected. When all the wastewater in the sample chamber 1 is discharged, the chamber bottom 3 is discharged. The valve 4 and the gas inlet valve 6 are closed.
가열기(10)는 단시간 내에 1000-2000℃로 가열되도록 되었다. 가열기(10)는 샘플 챔버 내에 채워졌다가 배출되면서 표면에 묻은 미량의 폐수에 적셔진 상태로 있는데, 이러한 상태에서 가열기(10)가 전술한 바와 같은 고열로 가열되면, 가열기(10)에 묻어 있는 산화성 물질이 CO2또는 NO로 연소됨과 동시에 가열기(10)에 묻어 있는 물도 순식간에 증발되어 샘플 챔버(1)내의 압력이 상승되게 된다.The heater 10 was allowed to heat to 1000-2000 ° C. in a short time. The heater 10 is filled with a small amount of waste water on the surface as it is filled in the sample chamber and discharged. In this state, when the heater 10 is heated to a high temperature as described above, the heater 10 is buried in the heater 10. At the same time as the oxidizing material is burned with CO 2 or NO, the water buried in the heater 10 is also evaporated in an instant, so that the pressure in the sample chamber 1 is increased.
증발에 의해 발생된 압력 상승을 압력 게이지(8)에 의해 측정하거나 또는 가스 중의 수분 함량을 측정하여, 전술한 측정 데이타로부터 연산장치(도시되지 않았음)에 의하여 증발된 물의 양이 계산된다.The pressure rise generated by evaporation is measured by the pressure gauge 8 or by measuring the water content in the gas, and the amount of water evaporated by the computing device (not shown) is calculated from the above-described measurement data.
이어서 가스 배출 밸브(9)와 가스 유입 밸브(6)를 개방하여 가스 유입 밸브(6)로 가스를 유입시켜 샘플 챔버(1) 내에서 생성된 CO2및/또는 NO 가스를 포함하는 연소 가스를 가스 배출 밸브(9)를 통하여 적외선 측정장치(도시되지 않았음)로 공급하고 함유된 CO2및/또는 NO 의 양을 측정한다. 이렇게 해서 얻어진 값은 압력 상승 또는 습기 상승으로부터 측정된 증발된 샘플의 부피와 함께 산화성 물질의 함량, 예를 들면 탄소 및/또는 질소의 함량을 계산하는데 이용된다.Subsequently, the gas discharge valve 9 and the gas inlet valve 6 are opened to introduce gas into the gas inlet valve 6 so as to burn combustion gas including the CO 2 and / or NO gas generated in the sample chamber 1. The gas discharge valve 9 is fed to an infrared measuring device (not shown) and the amount of CO 2 and / or NO contained is measured. The value thus obtained is used to calculate the content of the oxidizing material, for example carbon and / or nitrogen, together with the volume of the evaporated sample measured from the pressure rise or the moisture rise.
전술한 설명은 폐수 중에 잠기는 측정 부표를 사용하여 측정하는 예를 설명한 것이다. 그러나, 분석할 폐수가 관 또는 펌프를 통해 샘플 챔버에 공급되는 경우에는 본 발명의 방법이 다른 형태의 측정 장치에도 바람직하게 이용될 수 있다.The foregoing description illustrates an example of measuring using a measurement buoy submerged in wastewater. However, when the waste water to be analyzed is supplied to the sample chamber via a tube or a pump, the method of the present invention can be preferably used for other types of measuring devices.
Claims (6)
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| KR10-1998-0708812A KR100466303B1 (en) | 1996-05-03 | 1997-04-26 | Method and apparatus for measuring the content of oxidizing substances in aqueous liquids |
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| DE19617910.6 | 1996-05-03 | ||
| KR10-1998-0708812A KR100466303B1 (en) | 1996-05-03 | 1997-04-26 | Method and apparatus for measuring the content of oxidizing substances in aqueous liquids |
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| KR20200068023A (en) * | 2018-02-28 | 2020-06-15 | 아나테크 엔터프라이즈 씨오 엘티디 | Water Quality Analysis Instrument |
| KR20230099090A (en) * | 2021-12-27 | 2023-07-04 | 광주과학기술원 | Measurement System and Method for Various Oxidative Toxicity of Fine Particles in a Rapid Manner |
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| KR100880871B1 (en) | 2007-08-28 | 2009-01-30 | 한국해양연구원 | Apparatus and method for automatic picking of a sample using headspace |
| DE102018105611A1 (en) * | 2018-03-12 | 2019-09-12 | Lar Process Analysers Ag | Measuring arrangement and measuring method for determining an ingredient or quality parameter of water or wastewater |
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| KR20200068023A (en) * | 2018-02-28 | 2020-06-15 | 아나테크 엔터프라이즈 씨오 엘티디 | Water Quality Analysis Instrument |
| KR20230099090A (en) * | 2021-12-27 | 2023-07-04 | 광주과학기술원 | Measurement System and Method for Various Oxidative Toxicity of Fine Particles in a Rapid Manner |
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