An ozone catalytic TOC analyzer

Abstract

This invention discloses an ozone-catalyzed TOC analyzer, comprising: a stripping tube, a sample injection pump, several reagent pumps, an eight-ring valve, an ozone supply unit, a heating device, and a detector. One end of the sample injection pump is connected to the sample inlet at the bottom of the stripping tube, and the other end is connected to the eight-ring valve. The common end on the reverse side of the eight-ring valve is connected to the sample injection pump, and several ports on the front side are respectively connected to pure water, sample, standard solution, and waste discharge. The top of the stripping tube is provided with several reagent ports, which are respectively connected to the reagent pumps and the ozone supply unit. The top of the stripping tube also has a CO2 outlet, and the detector is connected to the CO2 outlet. The heating device is mounted on the stripping tube. This invention, through the eight-ring valve sample injection and independent reagent pumps, can significantly improve the stability of TOC test data.

Description

Technical Field

[0001] This utility model relates to the field of remanufactured generator technology, specifically to an ozone catalytic TOC analyzer. Background Technology

[0002] Total organic carbon (TOC) is an important indicator for assessing the degree of organic pollution in water quality, and its result is expressed as the mass concentration of carbon (C). Currently, the principle of TOC determination is based on converting organic carbon in the sample into carbon dioxide using different oxidation methods, and then using the correspondence between carbon dioxide and TOC carbon content to calculate the TOC content.

[0003] The methods for measuring water quality can be divided into direct and indirect methods. Direct methods generally yield more accurate results, but because they rely on oxidation through combustion, they are less convenient for online monitoring. Therefore, indirect methods are mostly used in online water quality monitoring.

[0004] In the indirect determination of TOC, ozone is often used as an oxidant. The principle of ozone catalytic oxidation for TOC determination involves adding an ozone generator to the analytical flow path of a total organic carbon (TOC) analyzer. Utilizing the strong oxidizing properties of ozone, organic carbon is oxidized and decomposed into inorganic carbon. This method offers good accuracy. However, in existing TOC analyzers, only a single peristaltic pump is typically used to add reagents, which can easily lead to interactions between reagents, resulting in relatively poor stability of the test results. Utility Model Content

[0005] The purpose of this invention is to provide an ozone-catalyzed TOC analyzer that improves the stability of TOC test data through an eight-ring valve injection and an independent reagent pump. To achieve the above objective, this invention adopts the following technical solution:

[0006] This utility model discloses an ozone-catalyzed TOC analyzer, comprising: a stripping tube, a sample injection pump, several sets of reagent pumps, an eight-ring valve, an ozone supply unit, a heating device, and a detector. One end of the sample injection pump is connected to the sample inlet at the bottom of the stripping tube, and the other end is connected to the eight-ring valve. The common end on the reverse side of the eight-ring valve is connected to the sample injection pump, and several ports on the front side are respectively connected to pure water, sample and standard solution, and waste discharge.

[0007] The top of the stripping tube is provided with several reagent ports, which are respectively connected to the reagent pump and the ozone supply unit. The top of the stripping tube is also provided with a CO2 outlet, and the detector is connected to the CO2 outlet. The heating device is mounted on the stripping tube.

[0008] Furthermore, the ozone catalytic TOC analyzer also includes: an air pump and a CO2 absorber A, one end of which is connected to the CO2 absorber A and the other end is connected to the reagent port at the top of the stripping tube, and the other end of the CO2 absorber A is connected to air.

[0009] The reagent pump is provided in two sets, with the first reagent pump connected to the alkaline reagent bottle and the second reagent pump connected to the acidic reagent bottle.

[0010] Preferably, the top of the stripping tube has two reagent ports, wherein the first reagent port is connected to the first reagent pump and the ozone supply unit, and the second reagent port is connected to the second reagent pump and the air pump. A three-way valve Q1 is installed between the first reagent port and the first reagent pump and the ozone supply unit; the first reagent pump is connected to the NO terminal of the three-way valve Q1, the ozone supply unit is connected to the NC terminal of the three-way valve Q1, and the first reagent port is connected to the COM terminal of the three-way valve Q1. A three-way valve Q2 is installed between the second reagent port and the second reagent pump and the air pump; the second reagent pump is connected to the NO terminal of the three-way valve Q2, the air pump is connected to the NC terminal of the three-way valve Q2, and the second reagent port is connected to the COM terminal of the three-way valve Q2.

[0011] Furthermore, an adjustable flow meter is installed between the air pump and the stripping pipe, and the air pump is connected to the CO2 absorber A via a three-way connector, the other end of which is connected to one end of the eight-ring valve.

[0012] Preferably, a water sample detector is installed between the reagent pump and the stripping tube, and between the sample injection pump and the eight-ring valve.

[0013] Preferably, the detector is an NDIR detector, and a TOC reaction chamber is installed between the detector and the stripping tube, the TOC reaction chamber containing copper particles and a desiccant that does not absorb carbon dioxide.

[0014] Furthermore, the ozone catalytic TOC analyzer also includes an ozone absorber, and an ozone outlet is provided at the top of the stripping tube. The ozone absorber is connected to the ozone outlet, and a drying device is installed between the ozone absorber and the stripping tube.

[0015] Preferably, three-way valves Q3, Q4, and Q5 are sequentially connected between the CO2 outlet, the ozone outlet, the detector, and the ozone absorber. The COM terminals of three-way valves Q3 and Q4 are interconnected, and the NC terminal of three-way valve Q4 is connected to the COM terminal of three-way valve Q5. The NO and NC terminals of three-way valve Q3 are connected to the CO2 outlet and the ozone outlet, respectively. The NO terminal of three-way valve Q4 is connected to the detector, and the NC terminal of three-way valve Q5 is connected to the ozone absorber. The NO terminal is used to discharge waste.

[0016] Furthermore, the ozone supply unit includes an air compressor, an air source triplet, a solenoid valve, an oxygen generator, a CO2 absorber B, and an ozone generator. The air compressor, air source triplet, solenoid valve, oxygen generator, CO2 absorber B, and ozone generator are connected in sequence, and the other end of the ozone generator is connected to the stripping pipe.

[0017] After adopting the above technical solution, the present invention has the following effects:

[0018] 1. This utility model uses an eight-ring valve for sample introduction, and each reagent is equipped with an independent reagent pump, which greatly improves the stability of test data.

[0019] 2. This invention utilizes ozone catalysis and an external heating device on the stripping tube to fully oxidize the sample, causing organic carbon to be completely oxidized and decomposed into carbon dioxide, thereby improving the accuracy of the test results.

[0020] 3. This utility model absorbs excess ozone by setting up an ozone absorber, thus avoiding environmental pollution and achieving environmental protection requirements. Attached Figure Description

[0021] Figure 1 This is a frame diagram of the device of this utility model.

[0022] Figure 2 This is a structural diagram of the blowout tube of this utility model.

[0023] Figure 3 This is a diagram showing the connection lines at each end of the eight-ring valve of this utility model.

[0024] Figure 4 A block diagram of the ozone supply unit.

[0025] Main component symbols:

[0026] 1: Stripping tube; 1A: Sample inlet; 1B: First reagent inlet; 1C: Second reagent inlet; 1D: CO2 outlet; 1E: Ozone outlet; 2: Sample pump; 3: First reagent pump; 4: Second reagent pump; 5: Eight-ring valve; 6: Ozone supply unit; 61: Air compressor; 62: Gas source triplet; 63: Solenoid valve; 64: Oxygen generator; 65: CO2 absorber B; 66: Ozone generator; 7: Heating device; 8: Detector; 9: Air pump; 10: Adjustable flow meter; 11: CO2 absorber A; 12: TOC reaction chamber; 13: Ozone absorber; 14: Drying device; Q1-Q5: Three-way valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 3 As shown, this utility model discloses an ozone catalytic TOC analyzer, including: a stripping tube 1, a sample injection pump 2, several sets of reagent pumps, an eight-ring valve 5, an ozone supply unit 6, a heating device 7, and a detector 8.

[0029] One end of the injection pump 2 is connected to the injection port 1A at the bottom of the stripping tube 1, and the other end is connected to the eight-ring valve 5. The common end on the back of the eight-ring valve 5 is connected to the injection pump 2, and several ports on the front are respectively connected to pure water, sample and standard solution, and waste discharge.

[0030] The top of the stripping tube 1 is provided with several reagent ports, which are respectively connected to the reagent pump and the ozone supply unit 6. The top of the stripping tube 1 is also provided with a CO2 outlet 1D, and the detector 8 is connected to the CO2 outlet 1D.

[0031] Several sets of reagent pumps and the pipeline connecting the ozone supply unit 6 to the reagent port extend into the bottom of the stripping tube 1, ensuring that the relevant reagents and ozone are added below the sample liquid level to achieve a complete reaction. The pipeline connecting the detector 8 to the CO2 outlet 1D extends into the top of the stripping tube 1. Since CO2 is less dense than ozone, after the reaction, CO2 will be located on top of the excess ozone and thus discharged from the stripping tube 1.

[0032] The heating device 7 is mounted on the blow-off pipe 1.

[0033] In this embodiment, the ozone catalytic TOC analyzer further includes: an air pump 9 and a CO2 absorber A 11. One end of the air pump 9 is connected to the CO2 absorber A 11, and the other end is connected to the reagent port at the top of the stripping tube 1. The other end of the CO2 absorber A 11 is connected to air. The tubing connecting the air pump 9 to the reagent port extends into the bottom of the stripping tube 1. After the sample has fully reacted, the air pump 9 blows the CO2 generated in the reaction towards the top of the stripping tube 1.

[0034] At the same time, combined Figure 2 As shown, there are two sets of reagent pumps, with the first reagent pump 3 connected to the alkaline reagent bottle and the second reagent pump 4 connected to the acidic reagent bottle.

[0035] The top of the stripping tube 1 has two reagent ports. The first reagent port 1B is connected to the first reagent pump 3 and the ozone supply unit 6, and the second reagent port 1C is connected to the second reagent pump 4 and the air pump 9. A three-way valve Q1 is installed between the first reagent port 1B and the first reagent pump 3 and the ozone supply unit 6. The first reagent pump 3 is connected to the NO terminal of the three-way valve Q1, the ozone supply unit 6 is connected to the NC terminal of the three-way valve Q1, and the first reagent port 1B is connected to the COM terminal of the three-way valve Q1. A three-way valve Q2 is installed between the second reagent port 1C and the second reagent pump 4 and the air pump 9. The second reagent pump 4 is connected to the NO terminal of the three-way valve Q2, the air pump 9 is connected to the NC terminal of the three-way valve Q2, and the second reagent port 1C is connected to the COM terminal of the three-way valve Q2.

[0036] In this embodiment, an adjustable flow meter 10 is installed between the air pump 9 and the stripping pipe 1, which can accurately measure and effectively control the stripping airflow. The air pump 9 is connected to the CO2 absorber A 11 via a three-way connector, and the other end of the three-way connector is connected to one end of the eight-ring valve 5.

[0037] Furthermore, water sample detectors are installed between the reagent pump and the stripping tube 1, and between the sample injection pump 2 and the eight-ring valve 5.

[0038] Furthermore, in this embodiment, detector 8 is an NDIR detector. NDIR detectors employ non-dispersive infrared technology, enabling efficient and accurate monitoring and measurement of real-time CO2 concentration, obtaining peak CO2 concentration data. A TOC reaction chamber 12 is installed between detector 8 and the stripping tube 1. The TOC reaction chamber 12 contains copper particles and a desiccant that does not absorb carbon dioxide, absorbing moisture and other impurities entrained in the stripped CO2, leaving only CO2 to reach detector 8, thus making the measurement results more accurate.

[0039] Meanwhile, the ozone catalytic TOC analyzer also includes an ozone absorber 13, and an ozone outlet 1E is provided at the top of the stripping tube 1. The ozone absorber 13 is connected to the ozone outlet 1E, and a drying device 14 is installed between the ozone absorber 13 and the stripping tube 1. The connection between the ozone absorber 13 and the ozone outlet 1E extends into the heated end of the stripping tube 1, so that after the sample has fully reacted, excess ozone can be directly discharged outside the stripping tube 1.

[0040] In this embodiment, three-way valves Q3, Q4, and Q5 are sequentially connected between CO2 outlet 1D, ozone outlet 1E, detector 8, and ozone absorber 13. The COM terminals of three-way valves Q3 and Q4 are interconnected, and the NC terminal of Q4 is connected to the COM terminal of Q5. The NO and NC terminals of three-way valve Q3 are connected to CO2 outlet 1D and ozone outlet 1E, respectively. The NO terminal of three-way valve Q4 is connected to detector 8, and the NC terminal of three-way valve Q5 is connected to ozone absorber 13. The NO terminal is used to discharge waste.

[0041] Since this ozone catalytic TOC analyzer oxidizes the sample with ozone, the three-way valves Q1-Q5 are all corrosion-resistant two-position three-way valves.

[0042] like Figure 4 As shown, in this embodiment, the ozone supply unit 6 includes: an air compressor 61, an air source triplet 62, a solenoid valve 63, an oxygen generator 64, a CO2 absorber B 65, and an ozone generator 66. The air compressor 61, air source triplet 62, solenoid valve 63, oxygen generator 64, CO2 absorber B 65, and ozone generator 66 are connected sequentially, and the other end of the ozone generator 66 is connected to the stripping pipe 1. The air source triplet includes three air source processing components: an air filter, a pressure reducing valve, and an oil mist lubricator.

[0043] The steps for determining TOC using this ozone-catalyzed TOC analyzer are as follows:

[0044] S1. Cleaning: Pure water is injected into the injection pump 2 through one end of the eight-ring valve 5, and the injection pump 2 pumps the pure water into the stripping tube 1 for cleaning.

[0045] S2. Drainage: After cleaning the inner cavity of the stripping tube 1 with pure water, the sample pump 2 reverses to drain all the waste liquid in the stripping tube 1 through the eight-ring valve 5.

[0046] S3. Sample injection: The sample is injected into the injection pump 2 through one end of the eight-ring valve 5, and the injection pump 2 pumps the sample into the stripping tube 1 for injection.

[0047] S4. First stripping: Open the three-way valve Q2 and pump the acidic reagent R2 into the stripping tube 1 through the second reagent pump 4 to lower the pH value of the sample. Then, the relevant gas is drawn in by the air pump 9 to purge the inorganic carbon in the sample out of the stripping tube 1 in the form of CO2 and into the detector 8. At this time, the detector 8 will detect a peak value of inorganic carbon.

[0048] S5. Digestion: Close the three-way valve Q2 and open the three-way valve Q1. Pump the alkaline reagent R1 into the stripping tube 1 through the first reagent pump 3. At the same time, turn on the ozone supply unit 5 and introduce ozone for oxidation to fully convert the organic carbon in the sample into CO2.

[0049] S6. Second stripping: Close the three-way valve Q1 and open the three-way valve Q2. Pump the acidic reagent R2 into the stripping tube 1 through the second reagent pump 4 to lower the pH value of the sample after the reaction. Then, the relevant gas is drawn in through the gas pump 9 to purge the CO2 generated after the reaction of organic carbon in the sample out of the stripping tube 1 and into the detector 8. At this time, the detector 8 will detect a peak value of organic carbon.

[0050] S7. Calculation: Detector 8 calculates the concentration of total organic carbon in the sample by taking the inorganic carbon peak and organic carbon peak detected in the two detections, as well as the peak values ​​of the standard solution and the blank.

[0051] The above description is only a preferred embodiment of the present utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ozone catalytic TOC analyzer characterized by, include: The system includes a stripping tube, a sample injection pump, several sets of reagent pumps, an eight-ring valve, an ozone supply unit, a heating device, and a detector. One end of the injection pump is connected to the injection port at the bottom of the stripping tube, and the other end is connected to the eight-ring valve; the common end on the back of the eight-ring valve is connected to the injection pump, and several ports on the front are respectively connected to pure water, sample and standard solution, and waste discharge. The top of the stripping tube is provided with several reagent ports, which are respectively connected to the reagent pump and the ozone supply unit. The top of the stripping tube is also provided with a CO2 outlet, and the detector is connected to the CO2 outlet. The heating device is mounted on the blow-off tube.

2. An ozone catalytic TOC analyzer as claimed in claim 1, characterized in that: Also includes: An air pump and a CO2 absorber A are provided. One end of the air pump is connected to the CO2 absorber A, and the other end is connected to the reagent port at the top of the stripping tube. The other end of the CO2 absorber A is connected to air.

3. An ozone catalytic TOC analyzer as claimed in claim 2, characterized in that: The reagent pump is provided in two sets, with the first reagent pump connected to the alkaline reagent bottle and the second reagent pump connected to the acidic reagent bottle.

4. An ozone catalytic TOC analyzer as claimed in claim 3, characterized in that: The top of the stripping tube is provided with two reagent ports, wherein the first reagent port is connected to the first reagent pump and the ozone supply unit, and the second reagent port is connected to the second reagent pump and the air pump. Furthermore, a three-way valve Q1 is installed between the first reagent port and the first reagent pump and ozone supply unit. The first reagent pump is connected to the NO terminal of the three-way valve Q1, the ozone supply unit is connected to the NC terminal of the three-way valve Q1, and the first reagent port is connected to the COM terminal of the three-way valve Q1. A three-way valve Q2 is installed between the second reagent port and the second reagent pump and air pump. The second reagent pump is connected to the NO terminal of the three-way valve Q2, the air pump is connected to the NC terminal of the three-way valve Q2, and the second reagent port is connected to the COM terminal of the three-way valve Q2.

5. An ozone catalytic TOC analyzer as claimed in claim 2, characterized in that: An adjustable flow meter is installed between the air pump and the stripping pipe, and the air pump is connected to the CO2 absorber A via a three-way connector, the other end of which is connected to one end of the eight-ring valve.

6. An ozone catalytic TOC analyzer as claimed in claim 1, characterized in that: A water sample detector is installed between the reagent pump and the stripping tube, and between the sample injection pump and the eight-ring valve.

7. An ozone catalytic TOC analyzer as claimed in claim 1, characterized in that: The detector is an NDIR detector, and a TOC reaction chamber is installed between the detector and the stripping tube. The TOC reaction chamber contains copper particles and a desiccant that does not absorb carbon dioxide.

8. An ozone catalytic TOC analyzer as claimed in claim 1, characterized in that: Also includes: An ozone absorber is provided, and an ozone outlet is provided at the top of the stripping tube. The ozone absorber is connected to the ozone outlet, and a drying device is installed between the ozone absorber and the stripping tube.

9. An ozone catalytic TOC analyzer as claimed in claim 8, characterized in that: Three-way valves Q3, Q4, and Q5 are sequentially connected between the CO2 outlet, the ozone outlet, the detector, and the ozone absorber. The COM terminals of three-way valves Q3 and Q4 are connected to each other, and the NC terminal of three-way valve Q4 is connected to the COM terminal of three-way valve Q5. The NO and NC ends of the three-way valve Q3 are connected to the CO2 outlet and ozone outlet, respectively. The NO end of the three-way valve Q4 is connected to the detector. The NC end of the three-way valve Q5 is connected to the ozone absorber. The NO end is used to discharge waste.

10. An ozone-catalytic TOC analyzer according to any one of claims 1 to 9, characterized in that: The ozone supply unit comprises an air compressor, a gas source triad, a solenoid valve, an oxygen generator, a CO2 absorber B and an ozone generator, the air compressor, the gas source triad, the solenoid valve, the oxygen generator, the CO2 absorber B and the ozone generator are sequentially connected, and the other end of the ozone generator is connected with the blow-off pipe.

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