Total carbon reactor and carbon content detection system
By using a three-way valve in the total carbon reactor to control the oxygen flow, the backflushing function of the combustion chamber is realized, which solves the problems of low detection efficiency and connection blockage, and improves detection efficiency and system stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN CENT OF GEOLOGICAL SURVEY CGS
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-09
AI Technical Summary
In existing technologies, carbon content detectors require waiting for the baseline to stabilize after sample replacement before starting detection, resulting in low detection efficiency. Furthermore, the connection between the combustion chamber and the gas pipe is prone to blockage, affecting detection efficiency.
A total carbon reactor was designed, which uses a three-way valve to control the oxygen flow direction. By introducing oxygen into the combustion chamber, carbon dioxide is driven out, achieving a backflushing function, avoiding waiting for the baseline to stabilize, and alleviating the blockage problem through oxygen backflushing.
It improves the efficiency of carbon content detection, reduces waiting time, decreases the frequency of manual unclogging of connections, and enhances the operational stability of the detection system.
Smart Images
Figure CN224341496U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of organic carbon detection technology, and in particular to a total carbon reactor and a carbon content detection system. Background Technology
[0002] When analyzing organic carbon content, an acidic reagent is usually added to the sample first. The acidic reagent reacts with the inorganic carbon in the sample to generate carbon dioxide, thus avoiding interference from inorganic carbon on the organic carbon content. The sample is then placed in the sample boat of the total carbon (TC) reactor and burned at high temperature in the presence of a catalyst and oxygen, oxidizing all the organic carbon in the sample into carbon dioxide. The carbon dioxide generated is then passed into a carbon content detector to determine the organic carbon content in the sample. However, during the process of placing the sample into the sample boat of the TC reactor, outside air also enters the TC reactor. The carbon dioxide contained in the air is passed into the carbon content detector, causing baseline fluctuations in the carbon content detector's evaluation of carbon content. Therefore, after each sample change, it is necessary to wait for the carbon content detector to return to a stable state before starting high-temperature combustion of the sample and monitoring the carbon dioxide produced by the combustion, which reduces the detection efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a total carbon reactor and a carbon content detection system to solve the problems existing in the prior art and improve the efficiency of carbon content detection.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] This invention provides a total carbon reactor, comprising: a combustion chamber containing a sample, capable of heating the sample; one end of the combustion chamber being connected to a carbon content detector via a first gas pipe, the first gas pipe having a first valve; the other end of the combustion chamber being connected to one end of a second gas pipe and one end of a third gas pipe, the third gas pipe having a second valve, and the other end of the third gas pipe being connected to the outside; and a three-way valve, comprising an inlet, a first outlet, and a second outlet; the inlet of the three-way valve being used to introduce oxygen; the first outlet of the three-way valve being connected to the first gas pipe located between the combustion chamber and the first valve; and the second outlet of the three-way valve being connected to the end of the second gas pipe away from the combustion chamber; when the three-way valve is in a first state, the inlet is connected to the first outlet, at which time the first valve is closed and the second valve is open; when the three-way valve is in a second state, the inlet is connected to the second outlet, at which time the first valve is open and the second valve is closed.
[0006] In some embodiments, when the three-way valve is in the first state, the air inlet is connected to the first air outlet, at which time the first valve is closed and the second valve is open; when the three-way valve is in the second state, the air inlet is connected to the second air outlet, at which time the first valve is open and the second valve is closed.
[0007] In some embodiments, a flow meter is connected to the air inlet of the three-way valve, and the flow meter is capable of measuring the flow rate of oxygen introduced into the air inlet.
[0008] In some embodiments, the combustion chamber is provided with a sampling port on the inner wall of the sampling area. The sampling port can be opened or closed. When the sample boat is placed in the sampling area and the sampling port is open, the sample can be placed in the sample boat.
[0009] In some embodiments, the sample boat is slidably connected to the side wall of the combustion chamber via a push-pull rod.
[0010] In some embodiments, a seal is provided at the sliding connection between the push-pull rod and the side wall of the combustion chamber.
[0011] In some embodiments, a controller is also included, which is signal-connected to the first valve, the second valve, and the three-way valve. The controller is capable of controlling the opening and closing of the first valve, the opening and closing of the second valve, and switching the three-way valve between the first state and the second state.
[0012] This utility model also provides a carbon content detection system, including a carbon content detector and a total carbon reactor as described in any of the above, wherein one end of the combustion chamber is connected to the carbon content detector through a first gas pipe.
[0013] In some embodiments, a condenser is also provided between the first valve and the total carbon reactor, the condenser being capable of condensing the gas generated after the sample is heated.
[0014] In some embodiments, the carbon content detector is a non-dispersive infrared detector.
[0015] The present invention achieves the following technical advantages over the prior art:
[0016] This invention provides a total carbon reactor and a carbon content detection system. First, the three-way valve is in its first state. The first valve is closed and the second valve is opened, connecting the inlet and outlet of the three-way valve. Oxygen enters the combustion chamber through the first gas pipe. When a sample is placed in the combustion chamber, the oxygen in the chamber carries carbon dioxide out through the third gas pipe. Then, the three-way valve is in its second state. The first valve is opened and the second valve is closed, connecting the inlet and outlet. Oxygen enters the combustion chamber through the second gas pipe, heating and burning the sample. The oxygen carries the carbon dioxide generated by heating the sample in the combustion chamber out through the first gas pipe to the carbon content detector for detection. Before combustion, oxygen is introduced into the combustion chamber to quickly release the carbon dioxide out, backflushing the chamber. After backflushing, the experimenter can directly begin high-temperature combustion of the sample without waiting for the carbon content detector to return to a stable state, saving detection time and improving detection efficiency.
[0017] Furthermore, with the testing of a large number of samples, the sample powder after combustion is prone to accumulate at the connection between the combustion chamber and the first gas pipe with the airflow, causing blockage at the connection. By allowing oxygen to enter the combustion chamber through the first gas pipe to backflush the combustion chamber, the blockage at the connection between the combustion chamber and the first gas pipe can be alleviated, reducing the need for test personnel to perform separate unblocking operations at the connection between the combustion chamber and the first gas pipe after the total carbon reactor has cooled down. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a carbon content detection system in one embodiment of this invention;
[0020] Figure 2 This is a schematic diagram showing the three-way valve in its first state in one embodiment of this invention;
[0021] Figure 3 This is a schematic diagram showing the three-way valve in its second state in one embodiment of this invention;
[0022] In the diagram: 1-Total carbon reactor; 11-Combustion chamber; 111-Sampling area; 112-Heating zone; 113-Sample boat; 114-Sampling port; 115-Push-pull rod; 12-Three-way valve; 121-Air inlet; 122-First air outlet; 123-Second air outlet; 124-Flow meter; 2-First gas pipe; 21-First valve; 3-Second gas pipe; 4-Third gas pipe; 41-Second valve; 5-Carbon content detector; 6-Condenser. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] The purpose of this invention is to provide a total carbon reactor and a carbon content detection system to solve the problems existing in the prior art and improve the efficiency of carbon content detection.
[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] Example 1
[0027] This embodiment provides a total carbon reactor 1, such as... Figures 1-3As shown, the device includes a combustion chamber 11 and a three-way valve 12. The combustion chamber 11 contains a sample and is capable of heating the sample. One end of the combustion chamber 11 is connected to a carbon content detector 5 via a first gas pipe 2, which is equipped with a first valve 21. The other end of the combustion chamber 11 is connected to one end of a second gas pipe 3 and one end of a third gas pipe 4, respectively. A second valve 41 is installed on the third gas pipe 4, and the other end of the third gas pipe 4 is connected to the outside. The three-way valve 12 includes an air inlet 1. 21. A first air outlet 122 and a second air outlet 123; the air inlet 121 of the three-way valve 12 is used to introduce oxygen; the first air outlet 122 of the three-way valve 12 is connected to the first air pipe 2 located between the combustion chamber 11 and the first valve 21; the second air outlet 123 of the three-way valve 12 is connected to the end of the second air pipe 3 away from the combustion chamber 11; in use, the three-way valve 12 is first in the first state, the first valve 21 is closed and the second valve 41 is opened, at which time the air inlet 121 of the three-way valve 12 is open. 1. The inlet 121 is connected to the first outlet 122. Oxygen enters the combustion chamber 11 through the first gas pipe 2. When the sample is placed in the combustion chamber 11, the oxygen in the combustion chamber 11 can drive carbon dioxide to be discharged to the outside through the third gas pipe 4. Then, when the three-way valve 12 is in the second state, the first valve 21 is opened and the second valve 41 is closed. The inlet 121 is connected to the second outlet 123. Oxygen enters the combustion chamber 11 through the second gas pipe 3. The combustion chamber 11 heats and burns the sample. The oxygen drives the carbon dioxide generated by heating the sample in the combustion chamber 11 to be discharged to the carbon content detector 5 through the first gas pipe 2 for detection. Before the sample is burned, oxygen is introduced into the combustion chamber 11 to drive the carbon dioxide in the combustion chamber 11 to be discharged to the outside in a short time, which backflushes the combustion chamber 11. After the discharge is completed, the experimenter can directly start the high-temperature combustion of the sample without waiting for the carbon content detector 5 to return to a stable state, saving detection time and improving detection efficiency.
[0028] Furthermore, with the testing of a large number of samples, the sample powder after combustion is prone to accumulate at the connection between the combustion chamber 11 and the first gas pipe 2 with the airflow, causing blockage at the connection. By allowing oxygen to enter the combustion chamber 11 through the first gas pipe 2 to backflush the combustion chamber 11, the blockage at the connection between the combustion chamber 11 and the first gas pipe 2 can be relieved, reducing the need for test personnel to perform separate unblocking operations at the connection between the combustion chamber 11 and the first gas pipe 2 after the total carbon reactor 1 has cooled down.
[0029] Specifically, three-way valve 12 is an electromagnetic three-way valve, such as... Figures 2-3 As shown, when the three-way valve 12 is in the first state, the second air outlet 123 of the three-way valve 12 is blocked, and the air inlet 121 is connected to the first air outlet 122. When the three-way valve 12 is in the second state, the first air outlet 122 of the three-way valve 12 is blocked, and the air inlet 121 is connected to the second air outlet 123.
[0030] In some implementations of this embodiment, such as Figure 1 As shown, the combustion chamber 11 includes a sample placement area 111 and a heating area 112. One end of the second gas pipe 3 and one end of the third gas pipe 4 are both connected to the sample placement area 111, and one end of the first gas pipe 2 is connected to the heating area 112. A sample boat 113 is provided in the combustion chamber 11. The sample boat 113 can move between the sample placement area 111 and the heating area 112. In the sample placement area 111, the sample can be added, and in the heating area 112, the sample can be heated and burned.
[0031] In some embodiments of this example, a resistance wire is wound around the outer wall of the heating zone 112 to heat and burn the sample by means of an electric current. The combustion chamber is a tubular cavity, usually made of quartz or ceramic tube, which can withstand high temperature and oxidizing atmosphere.
[0032] In some implementations of this embodiment, such as Figure 1 As shown, a flow meter 124 is connected to the air inlet 121 of the three-way valve 12. The flow meter 124 can measure the oxygen flow rate into the air inlet 121. By observing the oxygen flow rate into the air inlet 121, the operator can switch the state of the three-way valve 12. When the oxygen flow rate is greater than the volume of the combustion chamber 11, it indicates that the carbon dioxide in the combustion chamber 11 has been discharged. The three-way valve 12 is then switched from the first state to the second state for subsequent high-temperature combustion detection of the sample.
[0033] In some implementations of this embodiment, such as Figure 1 As shown, the combustion chamber 11 has a sampling port 114 on the inner wall of the sampling area 111. The sampling port 114 can be opened or closed. When the sample boat 113 is placed in the sampling area 111 and the sampling port 114 is open, the sample can be placed in the sample boat 113, thereby completing the sample addition.
[0034] In some implementations of this embodiment, such as Figure 1 As shown, the sample boat 113 is slidably connected to the side wall of the combustion chamber 11 via a push-pull rod 115. After the sample is added in the sample placement area 111, the sample boat 113 pushes the push-pull rod 115 to move the sample boat 113 from the sample placement area 111 to the heating area 112 to burn and heat the sample in the sample boat 113. After the test is completed, the push-pull rod 115 is pulled to move the sample boat 113 from the heating area 112 to the sample placement area 111 so that the sample can be added for the next test.
[0035] In some embodiments of this example, a seal is provided at the sliding connection between the push-pull rod 115 and the side wall of the combustion chamber 11. The seal can prevent gas from passing through the sliding connection between the push-pull rod 115 and the side wall of the combustion chamber 11.
[0036] In some embodiments of this example, the total carbon reactor 1 further includes a controller. The controller is signal-connected to the first valve 21, the second valve 41, and the three-way valve 12. The controller can control the opening and closing of the first valve 21, the second valve 41, and the switching of the three-way valve 12 between a first state and a second state. In use, the three-way valve 12 is first set to the first state, the first valve 21 is closed, and the second valve 41 is opened. At this time, the air inlet 121 of the three-way valve 12 is connected to the first air outlet 122, and oxygen enters the combustion chamber 11 through the first gas pipe 2. After the sample is placed in the combustion chamber 11, the oxygen in the combustion chamber 11 can carry carbon dioxide to be discharged to the outside through the third gas pipe 4. Then the three-way valve 12 is opened. When valve 12 is in the second state, the first valve 21 is opened and the second valve 41 is closed, connecting the air inlet 121 and the second air outlet 123. Oxygen enters the combustion chamber 11 through the second air pipe 3, heating and burning the sample. The oxygen then discharges the carbon dioxide generated by heating the sample in the combustion chamber 11 through the first air pipe 2 to the carbon content detector 5 for detection. Before the sample is burned, oxygen is introduced into the combustion chamber 11 to drive the carbon dioxide in the combustion chamber 11 to be discharged to the outside in a short time, backflushing the combustion chamber 11. After the discharge is completed, the experimenter can directly start high-temperature combustion of the sample without waiting for the carbon content detector 5 to return to a stable state, saving detection time and improving detection efficiency.
[0037] Example 2
[0038] This embodiment also provides a carbon content detection system, such as Figure 1 As shown, the device includes a carbon content detector 5 and a total carbon reactor 1. One end of the combustion chamber 11 is connected to the carbon content detector 5 through a first gas pipe 2. When the three-way valve 12 is in the first state, with the first valve 21 closed and the second valve 41 opened, oxygen enters the combustion chamber 11 through the first gas pipe 2 to backflush the combustion chamber 11. When the three-way valve 12 is in the second state, with the first valve 21 opened and the second valve 41 closed, oxygen discharges the carbon dioxide generated by heating the sample in the combustion chamber 11 through the first gas pipe 2 to the carbon content detector 5 for detection.
[0039] In some implementations of this embodiment, such as Figure 1 As shown, a condenser 6 is also provided between the first valve 21 and the total carbon reactor 1. The condenser 6 can condense the gas generated after the sample is heated to reduce the water vapor content sent into the carbon content detector 5, thereby reducing the influence of water vapor on the measurement results.
[0040] In some embodiments of this example, the carbon content detector is a non-dispersive infrared detector (NDIR). Carbon dioxide molecules have a specific absorption peak for infrared light at a wavelength of 4.26 μm, while other common gases (such as nitrogen, oxygen, water, etc.) have almost no absorption at this wavelength. Therefore, NDIR can accurately identify carbon dioxide without being interfered with by other gas components in the sample.
[0041] Specifically, an acidic reagent is first added to the sample to be tested. The acidic reagent reacts with the inorganic carbon in the sample to generate carbon dioxide, thus avoiding interference from the inorganic carbon with the organic carbon content in the sample. Then, when detecting the carbon content of the sample, a high-temperature catalytic combustion method is used. The sample is added to a TC (total carbon content) combustion chamber filled with an oxidizing catalyst and heated to 900°C by a resistance wire wound on the outside of the combustion chamber. The carbon in the sample is burned and oxidized into carbon dioxide. The carbon dioxide is carried by oxygen into the non-dispersive infrared detector (NDIR). The detection peak area of the NDIR is calculated in the data processing section. Since the peak area is proportional to the TC concentration in the sample, the relationship between TC concentration and peak area is obtained in advance using TC standard material, thereby determining the carbon content in the sample.
[0042] In some embodiments of this example, the carbon content detector is a mass spectrometer. After ionizing carbon dioxide, the carbon content in the sample is directly determined by screening the mass-to-charge ratio and detecting the ion intensity.
[0043] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A total carbon reactor characterized by, include: A combustion chamber containing a sample, capable of heating the sample, with one end of the combustion chamber connected to a carbon content detector via a first gas pipe equipped with a first valve, and the other end of the combustion chamber connected to one end of a second gas pipe and one end of a third gas pipe, with a second valve on the third gas pipe, and the other end of the third gas pipe connected to the outside. as well as A three-way valve, comprising an air inlet, a first air outlet, and a second air outlet, wherein the air inlet of the three-way valve is used to introduce oxygen, the first air outlet of the three-way valve is connected to a first air pipe located between the combustion chamber and the first valve, and the second air outlet of the three-way valve is connected to the end of the second air pipe away from the combustion chamber; When the three-way valve is in the first state, the air inlet is connected to the first air outlet, and the first valve is closed and the second valve is open; when the three-way valve is in the second state, the air inlet is connected to the second air outlet, and the first valve is open and the second valve is closed.
2. The total carbon reactor of claim 1, wherein, The combustion chamber includes a sample placement area and a heating area. One end of the second gas pipe and one end of the third gas pipe are connected to the sample placement area, and one end of the first gas pipe is connected to the heating area. A sample boat is provided in the combustion chamber and can move between the sample placement area and the heating area.
3. The total carbon reactor of claim 1, wherein, A flow meter is connected to the air inlet of the three-way valve, and the flow meter can measure the flow rate of oxygen entering the air inlet.
4. The total carbon reactor according to claim 2, characterized in that, The combustion chamber is provided with a sampling port on the inner wall of the sampling area. The sampling port can be opened or closed. When the sample boat is placed in the sampling area and the sampling port is open, the sample can be placed in the sample boat.
5. The total carbon reactor according to claim 2, characterized in that, The sample boat is slidably connected to the side wall of the combustion chamber via a push-pull rod.
6. The total carbon reactor according to claim 5, characterized in that, A seal is provided at the sliding connection between the push-pull rod and the side wall of the combustion chamber.
7. The total carbon reactor according to claim 1, characterized in that, It also includes a controller, which is signal-connected to the first valve, the second valve and the three-way valve. The controller is capable of controlling the opening and closing of the first valve, the opening and closing of the second valve, and the switching of the three-way valve between the first state and the second state.
8. A carbon content detection system, characterized in that, The device includes a carbon content detector and a total carbon reactor according to any one of claims 1 to 7, wherein one end of the combustion chamber is connected to the carbon content detector via a first gas pipe.
9. The carbon content detection system according to claim 8, characterized in that, A condenser is also provided between the first valve and the total carbon reactor, which is capable of condensing the gas generated after the sample is heated.
10. The carbon content detection system according to claim 8, characterized in that, The carbon content detector is a non-dispersive infrared detector.