KR102176595B1 - Toc measuring system using high frequency heating combustion - Google Patents

Abstract

The present invention relates to a TOC measuring system using high-frequency heating combustion, the TOC measuring system using high-frequency heating combustion according to an embodiment of the present invention, a sample supply unit for storing a sample; An air supply unit for supplying air from which carbon dioxide has been removed together with a sample supplied from the sample supply unit; A high frequency combustion device for supplying a sample and air from the sample supply unit and the air supply unit, and generating carbon dioxide by burning the supplied sample at high frequency; And a carbon dioxide detector for detecting carbon dioxide discharged from the high frequency combustion device, wherein the high frequency combustion device includes: a sample heating unit to which a sample containing carbon is supplied and disposed; A heating unit disposed to surround the sample heating unit and applying heat to the sample heating unit; An insulating part disposed to surround the heating part; And a high frequency part that is disposed to surround the insulating part and generates a high frequency with the supplied power. According to the present invention, since the measurement sample is heated at a high frequency to oxidize the organic material, energy consumption can be reduced, and the oxidation time is reduced, thereby minimizing the TOC measurement time.

Description

TOC measurement system using high frequency heating combustion {TOC MEASURING SYSTEM USING HIGH FREQUENCY HEATING COMBUSTION}

The present invention relates to a TOC measurement system using high-frequency heating combustion, and more particularly, high-frequency heating capable of measuring the amount of organic matter contained in the sample by oxidizing organic matter by high-frequency heating of a sample to be measured to generate CO2. It relates to a TOC measurement system using combustion.

TOC (total organic carbon), COD (chemical oxygen demand), and BOD (biological oxygen demand) are all items that can determine water pollution caused by organic matter. Because TOC, COD and BOD have different test conditions and oxidation rates, each of them has different application items and standards.

Among these, TOC and COD are physicochemical measurement methods, and BOD is a biochemical measurement method, so when applying various water quality standards in most countries, BOD is applied as a basis. And by applying one of TOC and COD together with BOD, a complementary system is formed.

Currently, Korea is applying BOD5 and CODMn as organic matter pollution indicators, and these two items can measure the oxygen demand required for oxidation of approximately 60-80% of carbon-based organic matter. On the other hand, TOC and TOD (total oxygen demand) can measure the oxygen demand required for oxidation of about 95% or more, so in the United States, Germany, and Japan, the concentration of organic pollutants is introduced by introducing TOC items other than the existing BOD or COD Are measuring. In addition, the TOC analyzer has the advantage of taking only a short time of about 1 to 2 minutes to analyze the measured value.

The TOC can calculate the total amount of organic carbon by oxidizing organic matter contained in a sample to CO2 at high temperature and measuring the amount of the generated by an analysis device. Therefore, all general TOC analyzers are measured in two steps. The first step is a process of oxidizing all organic compounds in the sample to CO2, and the second step is a detection process in which CO2 generated by oxidation of organic matter is quantified using conductivity or other methods such as non-dispersive infrared spectroscopy (NDIR). to be.

At this time, the process of oxidizing all organic compounds into CO2 in the sample may be performed using ultraviolet (UV) and an oxidizing agent method, a method using an oxidizing agent and a heating method, a high-temperature combustion oxidation method, and a method using ultraviolet rays. Among these methods, the high-temperature combustion oxidation method is widely used because it has excellent oxidation efficiency and can analyze particulate samples and high-concentration organic wastewater. In the high-temperature combustion oxidation method, a sample is oxidized by heating a sample at a high temperature of about 680°C. In this case, a platinum catalyst may be used because air and high-purity gas of CO2 are required.

Korean Registered Patent No. 10-1587559 and Korean Registered Patent No. 10-1531395 disclose a method of oxidizing organic matter in a sample by a high-temperature combustion oxidation method. However, most conventional high-temperature combustion oxidation methods mainly use a method of heating a sample using a heating coil, and the heat generated from the coil takes a long time to be transferred to the sample, and the power consumed to generate heat at high temperature is reduced. There are many drawbacks.

Korean Patent Registration No. 10-1587559 Korean Patent Registration No. 10-1531392

The problem to be solved by the present invention is to provide a TOC measurement system using high-frequency heating combustion capable of generating CO2 by high-frequency heating of a measurement sample to oxidize organic matter.

A TOC measurement system using high-frequency heating combustion according to an embodiment of the present invention includes: a sample supply unit for storing a sample; An air supply unit for supplying air from which carbon dioxide has been removed together with a sample supplied from the sample supply unit; A high frequency combustion device for supplying a sample and air from the sample supply unit and the air supply unit, and generating carbon dioxide by burning the supplied sample at high frequency; And a carbon dioxide detector for detecting carbon dioxide discharged from the high frequency combustion device, wherein the high frequency combustion device includes: a sample heating unit to which a sample containing carbon is supplied and disposed; A heating unit disposed to surround the sample heating unit and applying heat to the sample heating unit; An insulating portion disposed to surround the heating portion; And a high frequency part disposed to surround the insulating part and generating a high frequency with the supplied power.

Further comprising a cooling unit for cooling the gas containing carbon dioxide generated in the high frequency combustion device, the high frequency unit included in the high frequency combustion device may be formed in the shape of a tube so that water contained in the cooling unit can pass. have.

The high-frequency part may be arranged so that the shape of the tube is wrapped in a spiral shape along the outer peripheral surface of the insulating part.

The high-frequency part may be disposed to surround the outer peripheral surface of the insulating part in two or more layers.

The heating unit may be disposed to surround the lower end of the sample heating unit, and the sample heating unit may include a sample supply pipe extending through an upper portion of the sample heating unit and extending to an inner lower end of the sample heating unit.

A water supply unit for supplying water to the high frequency combustion device may be further included, and the water supply unit may supply water through the sample supply pipe to clean the inside of the sample heating unit.

Air supplied from the air supply unit together with water supplied from the water supply pipe to the sample supply pipe may be supplied to the sample heating unit through the sample supply pipe.

According to the present invention, since the measurement sample is heated at a high frequency to oxidize the organic material, energy consumption can be reduced, and the oxidation time is reduced, thereby minimizing the TOC measurement time.

Moreover, a cooling tube through which cooling water can flow is formed in the high frequency part provided to apply the high frequency so as to cool the heating part, so that stability can be maintained even if the sample is repeatedly measured.

1 is a view showing a TOC measurement system using high-frequency heating combustion according to an embodiment of the present invention.
2 is a view showing a high-frequency combustion apparatus of a TOC measurement system using high-frequency heating combustion according to an embodiment of the present invention.
3 is an exploded perspective view showing a high frequency combustion apparatus of a TOC measuring system using high frequency heating combustion according to an embodiment of the present invention.
4 is a view for explaining a sample heating unit included in the high frequency combustion device of the TOC measurement system using high frequency heating combustion according to an embodiment of the present invention.
5 is a view for explaining a sample heating unit included in the high-frequency combustion device of the TOC measurement system using high-frequency heating combustion according to another embodiment of the present invention.

A preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a diagram showing a TOC measurement system using high-frequency heating combustion according to an embodiment of the present invention.

Referring to FIG. 1, a TOC measurement system using high-frequency heating combustion according to an embodiment of the present invention will be described.

First, before supplying a sample to the high-frequency combustion device 100, a calibration liquid is supplied to the high-frequency combustion device 100. To this end, the correction liquid from the first and second correction liquid supply units 11 and 12 is supplied to the high-frequency combustion device 100 through the first to sixth intermediate liquid supply units 15 to 20 and the merging unit 22. I can. In addition, the air supplied from the air supply unit may be supplied to the high frequency combustion apparatus 100 together with the calibration liquid from the merging unit 22 through the first filter 24 and the first and second carbon dioxide removal units 25 and 26. have.

The first to sixth intermediate liquid supply units 15 to 20 are respectively connected to the manifold 60, and the manifold 60 may be connected to the dehumidifier 70. In addition, the manifold 60 may remove moisture from the gas supplied to the dehumidifier 70 as air is injected to the outside.

The first and second carbon dioxide removal units 25 and 26 are provided to remove carbon dioxide contained in the air, and the first and second carbon dioxide removal units 25 and 26 are sequentially passed through the air while carbon dioxide is Can be removed. In this way, the air from which oxygen dioxide has been removed may be supplied to the high-frequency combustion apparatus 100 in a state mixed with the calibration liquid in the merging unit 22.

In addition, the high-frequency combustion device 100 may be driven and oxidized by burning the supplied calibration liquid. Accordingly, the gas generated while the calibration solution is burned may measure the amount of carbon dioxide contained in the gas through the carbon dioxide detector 80 through the dehumidifier 70. In this case, the gas supplied to the carbon dioxide detector 80 may be supplied through the second filter 72.

In this case, as the amount of carbon dioxide is measured by the calibration solution, errors occurring in the test process of the TOC measurement system may be corrected when measuring the amount of carbon dioxide included in the sample afterwards. The corrective solution may contain certain organic substances.

Here, the high-frequency combustion device 100 may be electrically connected to the high-frequency generator 40. Accordingly, high frequency is generated in the high frequency combustion device 100 by the power supplied from the high frequency generator 40 to burn the sample.

As described above, after calibration is performed, an off-line liquid and a dilution water are supplied from the offline liquid supply unit 13 and the dilution solution supply unit 14, respectively, and can be supplied to the high frequency combustion device 100. have.

In addition, a sample to be measured may be supplied to the high frequency combustion apparatus 100 from one or more of the first and second sample supply units 31 and 32. In this case, the sample supplied from one or more of the first and second sample supply units 31 and 32 may be supplied to the high frequency combustion apparatus 100 through the same path as the calibration solution.

Therefore, the sample supplied to the high-frequency combustion device 100 is supplied to the high-frequency combustion device 100 together with the air from which carbon dioxide has been removed from the merging unit 22. Further, as the high-frequency combustion device 100 is driven, the sample is combusted to generate gas, and the generated gas is discharged from the high-frequency combustion device 100 and supplied to the cooling unit 50 to be cooled. And the cooled gas is supplied to the dehumidifier 70, and after removing moisture contained in the gas cooled by the dehumidifier 70, the carbon dioxide detector 80 measures the amount of carbon dioxide contained in the gas from which the moisture was removed. I can. At this time, by measuring the amount of carbon dioxide, the amount of carbon included in the carbon dioxide may be calculated, and the amount of organic matter included in the sample may be measured through the calculated amount of carbon.

Here, as air from which the sample and carbon dioxide have been removed is supplied to the high frequency combustion apparatus 100, carbon generated while the sample is burned may be combined with oxygen of the air to generate carbon dioxide. Accordingly, carbon included in the carbon dioxide detected by the carbon dioxide detector may be carbon included in the organic material.

And when the measurement of the sample is complete, since the high-frequency combustion device 100 is maintained at a high temperature, water is formed in the high-frequency part 150 in the water supply unit 33 to cool the high-frequency combustion device 100 Can be supplied as 152. Accordingly, while water moves along the cooling pipe 152, the temperature of the heating unit 160 generated by the high frequency unit 150 can be lowered. And the water discharged from the cooling pipe 152 is supplied to the cabinet, the water of the cooling unit 50 is supplied back to the water supply unit 33, and the water flowing through the cooling pipe 152 is supplied to the water supply unit 33, It may be configured to circulate the high-frequency combustion device 100 and the cooling unit 50.

In addition, if necessary, water supplied from the water supply unit 33 may fill the sample heating unit 140 through the sample supply pipe 142. Accordingly, the water supplied to the sample supply pipe 142 may be cleaned with the supplied water to the inside of the sample heating unit 140. In addition, as air from which carbon dioxide has been removed from the merging part 22 is supplied together with water, the interior of the sample heating part 140 may be cleaned using water and air.

2 is a diagram showing a high-frequency combustion apparatus of a TOC measuring system using high-frequency heating combustion according to an embodiment of the present invention, and FIG. 3 is a high-frequency combustion device of a TOC measuring system using high-frequency heating combustion according to an embodiment of the present invention. It is an exploded perspective view showing a combustion device. 4 is a view for explaining a sample heating unit 140 included in the high-frequency combustion device of the TOC measurement system using high-frequency heating combustion according to an embodiment of the present invention.

2 to 4, a description will be given of a high-frequency combustion device 100 according to an embodiment of the present invention. In this embodiment, the high frequency combustion device 100, the lower housing 110, the upper housing 120, the inner housing 130, the inner cover 132, the sample heating unit 140, the high frequency unit 150, It includes a heating unit 160, an insulating unit 170, a protection unit 180, and a cooling fan 190.

The lower housing 110 and the upper housing 120 form the exterior of the high frequency combustion device 100, and therein, a material heating unit, a high frequency unit 150, a heat generating unit 160, an insulating unit 170, a protection unit An accommodation space in which the 180 and the cooling fan 190 can be disposed is provided.

The inner housing 130 is disposed inside the lower housing 110 and the upper housing 120, and is provided to separate the sample heating unit 140 from other components. The inner cover 132 may be coupled to the inner housing 130 and is formed to cover the sample heating unit 140.

The sample heating unit 140 is disposed inside the inner housing 130, and a sample may be supplied therein, and the supplied sample may be heated and burned. The sample heating unit 140, in this embodiment, may be a quartz tube whose material is made of quartz, and may have durability that is not deformed or broken even when the temperature is increased to about 1200°C by the heating unit 160. .

In the sample heating unit 140, as shown in FIGS. 3 and 4, a sample supply pipe 142 and a carbon dioxide discharge pipe 144 may be disposed thereon. The sample supply pipe 142 may pass through the upper end of the sample heating unit 140 and extend into the sample heating unit 140, and may extend to an inner lower end of the sample heating unit 140. Therefore, the sample supplied to the sample heating unit 140 through the sample supply pipe 142 may be supplied to the inner bottom of the sample heating unit 140. In addition, carbon dioxide generated while the sample is burned may rise above the sample heating unit 140 and be discharged through the carbon dioxide discharge pipe 144.

Here, the carbon dioxide generated when the sample is burned does not flow back through the sample supply pipe 142, but since air is continuously supplied from the merging unit 22 together with the sample, the carbon dioxide generated by the combustion of the sample is transferred to the sample supply pipe 142 It is not discharged through, but may be discharged through the carbon dioxide discharge pipe 144.

The protective part 180 may be provided to surround the sample heating part 140 and the heating part 160 may be disposed outside the protective part 180. As shown in FIG. 4, the heating unit 160 may be disposed to surround a position including the lower end of the sample heating unit 140. As described above, since the sample may be concentrated and disposed at the lower end of the sample heating unit 140, the heating unit 160 is disposed to surround the lower end of the sample heating unit 140, Heat may burn the sample located in the sample heating unit 140 more quickly.

In this embodiment, the heating unit 160 may be made of a graphite material. Therefore, when a high frequency is supplied through the high frequency unit 150, heat may be generated by the high frequency. In this embodiment, the heating unit 160 may generate heat at a temperature ranging from about 600°C to 1200°C.

In addition, the insulating part 170 may be disposed to surround the outside of the heating part 160. The insulating unit 170 may be applied with AC power to the high frequency unit 150, and is provided to block the power applied to the high frequency unit 150 from affecting the heat generating unit 160. That is, the insulating part 170 is disposed to electrically insulate the heating part 160 and the high frequency part 150. In addition, the insulating part 170 may be made of a material having low thermal conductivity. Accordingly, the heat generated by the heating unit 160 may be partially blocked by the insulating unit 170, and accordingly, the high frequency unit 150 may be affected by the heat generated by the heating unit 160 to a minimum.

The high frequency part 150 may have a tube shape as shown. The high frequency unit 150 may be disposed so that both ends thereof are electrically connected to the first and second terminals 154 and 156, respectively, and surround the outer circumferential surface of the insulating unit 170 in a spiral shape. In this case, the location where the high frequency unit 150 is disposed includes a location where the heating unit 160 is disposed, and may be disposed larger than the length of the heating unit 160. Of course, the insulating part 170 may be formed larger than the heat generating part 160 and the high frequency part 150.

The first and second terminals 154 and 156 may be electrically connected to the high frequency generator 40, respectively.

Accordingly, the high-frequency unit 150 generates vibration having a high-frequency frequency due to the applied power, and transmits the vibration to the heating unit 160. Accordingly, the heating unit 160 may be heated by the transmitted high-frequency vibration.

In addition, in the present embodiment, the high frequency unit 150 may be formed in the shape of a tube. Accordingly, water supplied from the water supply unit 33 in FIG. 1 may be supplied through the cooling pipe 152 of the high frequency unit 150, and the water flows through the cooling pipe 152 to cool the heating unit 160. I can. That is, after the carbon measurement for the sample is completed, the heating unit 160 can rise to about 1200° C., as described above, so the insulating unit 170 is a material that the protection unit 180 can withstand at high temperatures. Even if the high temperature is maintained, durability of the insulating part 170 and the protection part 180 may be deteriorated. Therefore, when the carbon measurement for the sample is completed, water is supplied through the cooling pipe 152 formed in the high frequency unit 150 to cool the heating unit 160.

5 is a view for explaining a sample heating unit 140 included in the high frequency combustion device of the TOC measurement system using high frequency heating combustion according to another embodiment of the present invention.

At this time, FIG. 5 is an enlarged view of area A of FIG. 4, but is a view showing another modified embodiment.

5, a description will be given of a high-frequency combustion apparatus 100 according to another embodiment of the present invention. In this embodiment, the high frequency combustion device 100, the lower housing 110, the upper housing 120, the inner housing 130, the inner cover 132, the sample heating unit 140, the high frequency unit 150, It includes a heating unit 160, an insulating unit 170, a protection unit 180, and a cooling fan 190. While describing this embodiment, the same description as in the embodiment will be omitted.

In this embodiment, referring to FIG. 5, the high-frequency portion 150 is formed in a shape in which the outer peripheral surface of the insulating portion 170 is double wound. Accordingly, a high frequency of a relatively high frequency may be generated at a position in which the high frequency unit 150 is double disposed, and accordingly, heat generated from the heating unit 160 may be heated at a relatively high temperature.

As the heating unit 160 generates heat at a relatively high temperature, the sample disposed on the sample heating unit 140 may be burned faster, and thus, the test time for the sample may be shortened. In addition, since the sample can be quickly burned at a high temperature, complete combustion can be achieved, thereby increasing the accuracy of the measurement of the amount of carbon contained in the sample.

As described above, a detailed description of the present invention has been made by an embodiment with reference to the accompanying drawings, but the above-described embodiment has been described with reference to a preferred example of the present invention, so that the present invention is limited to the above embodiment. It should not be understood, and the scope of the present invention should be understood as the following claims and equivalent concepts.

11: first calibration liquid supply
12: second calibration liquid supply
13: Offline liquid supply
14: diluent supply unit
15 to 20: first to sixth intermediate liquid supply unit
21: water middle
22: merge part
23: air supply
24: first filter
25: first carbon dioxide removal unit
26: second carbon dioxide removal unit
31: first sample supply unit
32: second sample supply unit
33: water supply
40: high frequency generator
50: cooling unit
60: manifold
70: dehumidifier
72: second filter
80: carbon dioxide detector
100: high frequency combustion device
110: lower housing
120: upper housing
130: inner housing
132: inner cover
140: sample heating unit
142: sample supply pipe
144: carbon dioxide discharge pipe
150: high frequency part
152: cooling pipe
154: first terminal
156: second terminal
160: heating part
170: insulation
180: protection unit
190: cooling fan

Claims (7)

A sample supply unit for supplying a sample;
An air supply unit for supplying air from which carbon dioxide has been removed together with the sample supplied from the sample supply unit;
A high frequency combustion device for supplying a sample and air from the sample supply unit and the air supply unit, and generating carbon dioxide by burning the supplied sample at high frequency;
A carbon dioxide detector for detecting carbon dioxide discharged from the high-frequency combustion device;
A cooling unit that cools the gas containing carbon dioxide generated by the high frequency combustion device; And
And a water supply unit for supplying water to the high frequency combustion device,
The high-frequency combustion device,
A sample heating unit disposed to supply a sample containing carbon;
A heating unit disposed to surround the sample heating unit and applying heat to the sample heating unit;
An insulating portion disposed to surround the heating portion; And
It is disposed so as to surround the insulating portion, and includes a high-frequency portion for heating the heating portion by generating high-frequency vibration with the supplied power,
The high frequency part is formed in the shape of a tube so that water can pass,
The heating unit is disposed to surround the lower end of the sample heating unit,
The sample heating unit is provided with a sample supply pipe extending to an inner lower end of the sample heating unit through an upper portion of the sample heating unit to supply a sample,
The high frequency unit and the sample supply pipe are respectively connected to the water supply unit so that water can be supplied to the high frequency unit and the sample supply pipe,
Water may be supplied to and circulated from the water supply part to the high frequency part to cool the high frequency part, and water may be supplied to the sample heating part from the water supply part through the sample supply pipe to clean the inside of the sample heating part,
In the process of supplying water from the water supply unit to the sample supply pipe, air from the air supply unit is simultaneously supplied to the sample heating unit through the sample supply pipe, and the inside of the sample heating unit is cleaned using water and air. system. delete The method according to claim 1,
The high frequency part is a TOC measuring system arranged so that the shape of the tube is wrapped in a spiral shape along the outer peripheral surface of the insulating part. The method of claim 3,
The high-frequency part is a TOC measuring system disposed to surround the outer circumferential surface of the insulating part in two or more layers. delete delete delete

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