Online oxygen detection device

Abstract

The utility model belongs to oxygen detection technical field discloses an online oxygen detection device, including detection module and detection module, and detection module includes probe and pneumatic three -way valve, pneumatic three -way valve has two second ports and a first port, and the first port can selectively communicate with one of second ports, and one of second ports is connected with inert gas gas source, and the other second port is connected with sampling pipe, and one end of probe communicates with the first port, and the other end is located in the reaction container, detection module includes gas purification subassembly and gas analyzer, and gas purification subassembly is connected between sampling pipe and gas analyzer. Through setting up pneumatic three -way valve and gas purification subassembly, avoid probe pollution and block, remove the impurity in gas, improve the detection accuracy of gas analyzer.

Description

Technical Field

[0001] This utility model relates to the field of oxygen detection technology, and in particular to an online oxygen detection device. Background Technology

[0002] In some chemical reactions, it is necessary to detect the oxygen content of the gases produced to determine the reaction progress and the efficiency of product production. However, existing reaction gases contain many impurities, and the detection devices currently on the market often experience probe contamination and clogging after a period of use. Furthermore, oxygen content analyzers are easily interfered with by impurities in the gas, affecting the detection accuracy. Utility Model Content

[0003] The purpose of this invention is to provide an online oxygen detection device that can self-clean the probe and purify the gas, thereby improving detection accuracy.

[0004] To achieve this objective, the present invention adopts the following technical solution: an online oxygen detection device, comprising a detection module and a testing module. The detection module includes a probe and a pneumatic three-way valve. The pneumatic three-way valve has two second ports and one first port. The first port can selectively connect to one of the second ports. One of the second ports is connected to an inert gas source, and the other second port is connected to a sampling tube. One end of the probe is connected to the first port, and the other end is located inside the reaction vessel. The testing module includes a gas purification component and a gas analyzer. The gas purification component is connected between the sampling tube and the gas analyzer.

[0005] Preferably, the gas purification assembly includes a first filter, a cleaning component, a condenser, a second filter, a pump body, a Nennis filter, and a sampling flow meter connected sequentially along the gas flow direction. The input end of the second filter is connected to the sampling tube, and the output end of the sampling flow meter is connected to the gas analyzer.

[0006] Preferably, a third filter is connected between the pneumatic three-way valve and the probe.

[0007] Preferably, the detection module further includes a housing, in which the pneumatic three-way valve and the third filter are fixed, and the probe is fitted with a connecting pipe that is connected to the flange of the housing.

[0008] Preferably, the detection module further includes a bracket, which is welded and fixed to the housing and supported on the ground.

[0009] Preferably, the detection module further includes a drive component, which includes a programmable relay and a first solenoid valve. The relay is electrically connected to the first solenoid valve, and the input end of the first solenoid valve is connected to a compressed gas source, while the output end is connected to the pneumatic three-way valve pipeline.

[0010] Preferably, the drive assembly further includes an explosion-proof enclosure, in which both the relay and the first solenoid valve are installed.

[0011] Preferably, the condenser and the pump body are each connected to a pneumatic pressure regulating valve, which is connected to the compressed gas source.

[0012] Preferably, the detection module further includes an openable and closable enclosure, in which the gas purification component and the gas analyzer are both installed.

[0013] Preferably, the length of the probe within the reaction vessel along the axial direction of the probe is greater than or equal to 5 mm.

[0014] The beneficial effects of this invention are as follows: When the online oxygen detection device is working, the probe first samples the gas to be tested. Simultaneously, a pneumatic three-way valve controls the connection between the probe and the sampling tube, allowing the gas collected by the probe to be purified by the gas purification component before entering the gas analyzer. After the gas analyzer analyzes the oxygen content, the pneumatic three-way valve controls the connection between the probe and the inert gas source. The inert gas source blows inert gas towards the probe, achieving probe self-cleaning through backflushing. By setting up the pneumatic three-way valve and the gas purification component, the pneumatic three-way valve can control the probe sampling or control the inert gas source backflushing, avoiding probe contamination and blockage, extending the probe's service life and ensuring detection accuracy. The gas purification component can purify the gas collected by the probe, removing impurities and effectively improving the detection accuracy of the gas analyzer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the online oxygen detection device provided in this embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the detection module provided in an embodiment of the present invention;

[0017] Figure 3 This is an installation diagram of the online oxygen detection device provided in this embodiment of the utility model;

[0018] Figure 4 This is a side view of the housing provided in an embodiment of the present utility model.

[0019] In the diagram: 100, Detection module; 110, Probe; 111, Connecting pipe; 112, Flange; 120, Pneumatic three-way valve; 121, First port; 122, Second port; 123, Sampling tube; 130, Housing; 131, Third filter; 132, Diverter pipe; 140, Drive assembly; 141, Relay; 142, First solenoid valve; 143, Explosion-proof box; 200, Detection module; 210, Purification assembly; 211, First filter; 212, Cleaning component; 213, Condenser; 214, Second filter; 215, Pump body; 216, Nennis filter; 217, Sampling flow meter; 218, Vent flow meter; 219, Standard gas source; 220, Gas analyzer; 230, Pneumatic pressure regulating valve; 231, Second solenoid valve; 240, Housing. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] Reference Figures 1 to 4 As shown, an online oxygen detection device according to an embodiment of this application includes a detection module 100 and a detection module 200. The detection module 100 includes a probe 110 and a pneumatic three-way valve 120. The pneumatic three-way valve 120 has two second ports 122 and one first port 121. The first port 121 can selectively communicate with one of the second ports 122. One of the second ports 122 is connected to an inert gas source, and the other second port 122 is connected to a sampling tube 123. One end of the probe 110 is connected to the first port 121, and the other end is located inside the reaction vessel. Optionally, the reaction vessel can be a conventional reaction vessel such as a reactor or centrifuge, or it can be the exhaust pipe of a reactor. The probe 110 is inserted above the reserved port of the reaction vessel. When the reaction vessel is a pipe, the inner diameter of the pipe is greater than or equal to 40 cm. The detection module 200 includes a gas purification component 210 and a gas analyzer 220. The gas purification component 210 can be configured as multiple filters connected in series, multiple neutralization chemical cells connected in series, etc. The gas purification component 210 is used to purify the gas to be tested and is connected between the sampling tube 123 and the gas analyzer 220. In this embodiment, the gas analyzer 220 is configured as a paramagnetic oxygen analyzer. The paramagnetic oxygen analyzer utilizes the property that oxygen, as a special paramagnetic gas, is attracted in a magnetic field for detection, avoiding the influence of the external environment and air pressure, and ensuring detection accuracy.

[0025] Understandably, connecting an online oxygen detection device to the reaction vessel allows for the simultaneous detection of oxygen content in the generated test gas during the reaction. Probe 110 first samples the test gas, while a pneumatic three-way valve 120 connects probe 110 to sampling tube 123, allowing the test gas collected by probe 110 to be purified by gas purification component 210 before entering gas analyzer 220. After analyzing the oxygen content, gas analyzer 220 connects probe 110 to an inert gas source, which blows inert gas towards probe 110. Backflushing probe 110 achieves self-cleaning. By setting up a pneumatic three-way valve 120 and a gas purification component 210, the pneumatic three-way valve 120 can control the probe 110 to take samples or control the inert gas source to backflush, avoiding contamination and blockage of the probe 110, extending the service life of the probe 110 and ensuring detection accuracy. The gas purification component 210 can purify the gas collected by the probe 110, remove impurities from the gas, and effectively improve the detection accuracy of the gas analyzer 220.

[0026] Furthermore, along the axial direction of the probe 110, the length of the probe 110 inside the reaction vessel is greater than or equal to 5 mm. Optionally, the end of the probe 110 away from the pneumatic three-way valve 120, that is, the end of the probe 110 inserted into the reaction vessel, is provided with a guide portion, which is a beveled or conical structure formed at the end of the probe 110, and the guide portion is used to guide the probe 110 into the reaction vessel.

[0027] The length of the probe 110 extending into the container is limited to more than 5 mm, so that the probe 110 can penetrate the turbulent zone of the gas to be tested on the inner wall surface of the reaction container and reach the gas stability layer. This ensures that the probe 110 collects gas in the gas flow stability zone, further improving the accuracy of the detection results.

[0028] Reference Figure 1 As shown, the gas purification assembly 210 includes a first filter 211, a cleaning component 212, a condenser 213, a second filter 214, a pump body 215, a Nyquist filter 216, and a sampling flow meter 217 connected sequentially along the gas flow direction. The input end of the second filter 214 is connected to the sampling tube 123, and the output end of the sampling flow meter 217 is connected to the gas analyzer 220. Optionally, the sampling tube 123 can be a stainless steel tube, and the cleaning component 212 can be a conventional water washing tank. Alternatively, a fermentation washing tank or a water washing tank can be used depending on the physicochemical properties of the gas to be measured; further details will not be elaborated here.

[0029] When the sampling tube 123 passes the gas to be tested collected by the probe 110 into the gas purification component 210, the first filter 211 removes fine particles, reactant impurities, etc. from the gas; the cleaning component 212 removes compound impurities from the gas; the condenser 213 condenses and removes liquid impurities from the gas; the second filter 214 performs secondary filtration on the condensed gas to further remove minute impurities; the pump 215 provides power for the flow of the gas to be tested in the gas purification component 210; and the Nyquist filter 216 removes air impurities introduced when the gas passes through the pump 215, ensuring that the gas enters the gas analyzer 220 with high purity. The first filter 211, cleaning component 212, condenser 213, second filter 214, pump 215, and Nyquist filter 216 work together to remove solid, gaseous, liquid, and compound impurities from the gas to be tested, effectively improving the purity of the gas and ensuring the accuracy of the detection results. By setting up a sampling flow meter 217, users can easily adjust the power of the pump 215 to control the input and output of the gas to be tested.

[0030] It should be added that the output of the Nennis filter 216 can also be connected to a standard gas source 219 via a three-way valve. The standard gas source 219 can provide standard gas for the gas analyzer 220 for calibration. In addition, the output of the three-way valve can also be connected to a vent flow meter 218 to detect the vent flow rate after passing through the gas purification component 210.

[0031] Reference Figure 2 As shown, it can be understood that a third filter 131 is connected between the pneumatic three-way valve 120 and the probe 110. Optionally, the probe 110 has a filter element inside.

[0032] By setting a third filter 131, the gas to be tested is pretreated before entering the gas purification component 210, which avoids large particulate impurities in the gas from clogging the pneumatic three-way valve 120 or the sampling tube 123 and extends the service life of the detection module 100.

[0033] Furthermore, the detection module 100 also includes a drive assembly 140, which includes a programmable relay 141 and a first solenoid valve 142. The first solenoid valve 142 is a two-position five-way solenoid valve with one gas inlet P and two gas outlets A and B. The relay 141 is electrically connected to the first solenoid valve 142. The input end of the first solenoid valve 142, i.e., the gas inlet P of the two-position five-way solenoid valve, is connected to a compressed gas source. The output end of the first solenoid valve 142, i.e., the two gas outlets A and B of the two-position five-way solenoid valve, is respectively connected to the two gas inlets A and B of the pneumatic three-way valve 120. When compressed air enters the body inlet A of the pneumatic three-way valve 120, the first port 121 is connected to the second port 122 of the sampling tube 123. When compressed air enters the body inlet B of the pneumatic three-way valve 120, the first port 121 is connected to the second port 122 of the inert gas source.

[0034] The user can set the normally closed and normally open times of the internal timer (Q0) via the programmable relay 141. When Q0 is normally open, compressed air flows from the gas inlet P to the gas outlet A and enters the pneumatic three-way valve 120, connecting the first port 121 to the second port 122 connected to the sampling tube 123. At this time, the gas analyzer 220 can normally extract the gas to be tested from the reaction vessel through the sampling tube 123 and the gas purification component 210. When the Q0 time is set to normally closed, the coil of the two-position five-way solenoid valve is energized, and compressed air flows from the gas inlet P to the gas outlet B and enters the pneumatic three-way valve 120, connecting the first port 121 to the second port 122 connected to the inert gas source. At this time, the inert gas backflushes the third filter 131 and the probe 110 to remove dust adhering to the probe 110 and the third filter 131. When the Q0 time of the relay 141 switches again, the drive component 140 enters automatic cycle control. By setting relay 141 and first solenoid valve 142, the automatic cycle of sampling and backflushing self-cleaning of probe 110 can be realized, improving the automation level of detection module 100.

[0035] Reference Figure 2 and Figure 4 As shown, it can be understood that the detection module 100 also includes a housing 130, a pneumatic three-way valve 120 and a third filter 131, all of which are fixed inside the housing 130. The probe 110 is covered with a connecting pipe 111, and the end of the connecting pipe 111 is provided with a flange 112. The connecting pipe 111 is connected to the flange of the housing 130 through the flange 112.

[0036] By configuring the housing 130 and the connecting pipe 111, the pneumatic three-way valve 120 and the third filter 131 of the probe 110 can be protected. Simultaneously, installing the connecting pipe 111 on the surface of the reaction vessel facilitates the insertion of the probe 110, improving the ease of use of the detection module 100. Furthermore, the connection between the connecting pipe 111 and the flange of the housing 130 allows users to easily install, disassemble, and replace the probe 110 and the connecting pipe 111, reducing the later maintenance costs of the probe 110 and improving the adaptability of the connecting pipe 111 to different reaction vessels.

[0037] Furthermore, the detection module 100 also includes a bracket, which is welded and fixed to the housing 130 and supported on the ground. Optionally, when the reaction vessel is large and has a base platform, the bracket can also be directly supported on the base platform of the reaction vessel.

[0038] Fixing the end of the connecting tube 111 away from the housing 130 to the surface of the reaction vessel allows the housing 130 to be installed in a suspended manner. However, some probes 110 are quite long, which can cause the center of gravity of the detection module 100 to shift towards the housing 130, affecting the stability of the housing 130. By setting up a bracket, a stable support is provided for the housing 130, effectively improving the installation stability of the housing 130 and facilitating subsequent connection of pipelines such as the sampling tube 123.

[0039] Reference Figure 3 As shown, it can be understood that the drive assembly 140 also includes an explosion-proof enclosure 143, in which the relay 141 and the first solenoid valve 142 are installed.

[0040] By setting up an explosion-proof box 143, the explosion-proof box 143 can protect the relay 141 and the first solenoid valve 142, and also provide explosion protection in the event of a failure of the relay 141 and the first solenoid valve 142, thereby improving the safety of the drive assembly 140.

[0041] Furthermore, the condenser 213 and the pump body 215 are respectively connected to pneumatic pressure regulating valves 230. The pneumatic pressure regulating valves 230 are directly connected to the compressed gas source, or connected to the compressed gas source through the second solenoid valves 231. Specifically, the compressed gas source is provided with a distribution pipe 132, which distributes the compressed gas into the first solenoid valve 142 and the two second solenoid valves 231.

[0042] Using the same compressed gas source, the pneumatic three-way valve 120 in the detection module 100 is driven, while the two pneumatic pressure regulating valves 230 in the detection module 200 are powered, reducing the layout cost caused by additional gas sources and pipelines.

[0043] Reference Figure 1 and Figure 3As shown, the detection module 200 also includes an openable and closable housing 240, in which the gas purification component 210 and the gas analyzer 220 are installed. The side wall of the housing 240 has multiple drain ports. The first filter 211, cleaning component 212, condenser 213, and second filter 214 are all connected to drain pipes. The condenser 213 is connected to a collection tank, which is also connected to a drain pipe. Each drain pipe is equipped with a manual ball valve, and each drain pipe is connected to a drain port.

[0044] By integrating the gas purification component 210 and the gas analyzer 220 into a single enclosure 240, it is easier for users to debug and maintain the gas purification component 210 and improves the integration of the detection module 200.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An online oxygen detection device, characterized in that, include: The detection module (100) includes a probe (110) and a pneumatic three-way valve (120). The pneumatic three-way valve (120) has a first port (121) and two second ports (122). The first port (121) can selectively communicate with one of the second ports (122). One of the second ports (122) is connected to an inert gas source, and the other second port (122) is connected to a sampling tube (123). One end of the probe (110) is connected to the first port (121), and the other end is located inside the reaction vessel. The detection module (200) includes a gas purification component (210) and a gas analyzer (220), wherein the gas purification component (210) is connected between the sampling tube (123) and the gas analyzer (220).

2. The online oxygen detection device according to claim 1, characterized in that, The gas purification assembly (210) includes a first filter (211), a cleaning component (212), a condenser (213), a second filter (214), a pump body (215), a Nennis filter (216), and a sampling flow meter (217) connected sequentially along the gas flow direction. The input end of the second filter (214) is connected to the sampling tube (123), and the output end of the sampling flow meter (217) is connected to the gas analyzer (220).

3. The online oxygen detection device according to claim 1 or 2, characterized in that, A third filter (131) is connected between the pneumatic three-way valve (120) and the probe (110).

4. The online oxygen detection device according to claim 3, characterized in that, The detection module (100) also includes a housing (130), the pneumatic three-way valve (120) and the third filter (131) are both fixed inside the housing (130), and the probe (110) is covered with a connecting pipe (111), which is connected to the flange of the housing (130).

5. The online oxygen detection device according to claim 4, characterized in that, The detection module (100) also includes a bracket, which is welded and fixed to the housing (130) and supported on the ground.

6. The online oxygen detection device according to claim 2, characterized in that, The detection module (100) further includes a drive component (140), which includes a programmable relay (141) and a first solenoid valve (142). The relay (141) is electrically connected to the first solenoid valve (142). The input end of the first solenoid valve (142) is connected to a compressed gas source, and the output end is connected to the pipeline of the pneumatic three-way valve (120).

7. The online oxygen detection device according to claim 6, characterized in that, The drive assembly (140) also includes an explosion-proof enclosure (143), in which the relay (141) and the first solenoid valve (142) are both installed.

8. The online oxygen detection device according to claim 6, characterized in that, The condenser (213) and the pump body (215) are respectively connected to a pneumatic pressure regulating valve (230), and the pneumatic pressure regulating valve (230) is connected to the compressed gas source.

9. The online oxygen detection device according to claim 1, characterized in that, The detection module (200) also includes an openable and closable housing (240), and the gas purification component (210) and the gas analyzer (220) are both installed in the housing (240).

10. The online oxygen detection device according to claim 1, characterized in that, Along the axial direction of the probe (110), the length of the probe (110) within the reaction vessel is greater than or equal to 5 mm.

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