Device for detecting trace amounts of sulfides in the atmosphere

Abstract

The application discloses a trace sulfide detection device in atmosphere and particularly relates to the field of air detection, which comprises a sampling pipe and a bottom box, the one end of the sampling pipe is connected with the bottom box, a plugging assembly is arranged in the bottom box, a combustion chamber is arranged at the top end of the plugging assembly, a connecting pipe is arranged on one side of the combustion chamber, a photomultiplier is connected with the connecting pipe, a pressure dividing assembly is arranged at one end of the photomultiplier, a distance adjusting assembly is connected between the photomultiplier and the connecting pipe, and a top cover is arranged at the top end of the combustion chamber. The application has the advantages that the distance between the filter and the combustion chamber can be adjusted, so that the optimal state of the sample flame analysis of the combustion chamber can be adjusted, meanwhile, the water vapor generated in the combustion process can be collected, the surrounding of the device is prevented from being too humid or generating fog water, the toxic gas generated in the combustion process can be absorbed and prevented from being discharged, so that the trace sulfide in the atmosphere can be accurately detected, and the pollution of the atmosphere in the detection process can be reduced.

Description

Technical Field

[0001] This invention relates to the field of air detection technology, and more specifically, to a device for detecting trace amounts of sulfides in the atmosphere. Background Technology

[0002] Chemical production processes generate large amounts of sulfur-containing organic or inorganic waste gases. Additionally, sulfur-containing waste gases are released from raw material storage tanks in chemical plants, posing a significant threat to the surrounding environment. Before treating sulfur-containing waste gases, their concentration must be known to develop a targeted treatment process. Sulfur-containing organic matter in the soil decomposes into inorganic sulfides during anaerobic decomposition. Sulfates, under reducing conditions, can also be converted into sulfides by microorganisms. Sulfides react with acids to produce hydrogen sulfide, which easily escapes into the air, producing an unpleasant odor and is highly toxic. It can interact with cytochromes, oxidases, and disulfide bonds in these substances, affecting cellular oxidation processes, causing tissue hypoxia, and endangering human life. Therefore, flame photometric detectors are commonly used to detect atmospheric sulfides for targeted treatment. Flame photometric detectors (FPDs) are used to detect the presence of sulfur or phosphorus in a specific sample or analyte. A flame photometric detector uses a so-called chemiluminescence reaction, in which a compound containing sulfur or phosphorus encounters a hydrogen-rich flame. Chemiluminescence uses a quantitative measurement of light emission from excited chemical species to determine the concentration of the analyte. Chemiluminescence typically originates from the emission of excited molecular species. When incinerated or burned in such a flame, sulfur is converted into an emitting species called S2* and phosphorus is converted into an emitting species called HPO*. The wavelength range for exciting S2 emission particularly includes the region of 320–405 nanometers (nm) and the wavelength range for exciting HPO particularly includes the range of 510–530 nm. The molecular emission strikes a photomultiplier tube, which converts the photons into an electrical signal to quantify the concentration of the specific excited species.

[0003] Utility model patent CN218766803U discloses an FPD flame photometric detector, including a detection base and a gas path mounting base. The detection base has a combustion chamber that extends longitudinally through it. A heating rod mounting slot is located on the front upper side of the detection base, and a platinum resistance thermometer mounting slot is located on the rear lower side. A quartz glass tube is placed inside the combustion chamber. A connecting base is mounted on the upper end of the detection base, and a photomultiplier tube is mounted on the upper end of the connecting base. This FPD flame photometric detector facilitates the mixing of different gases using the gas path mounting base. The gas is then introduced into the combustion chamber by a flame nozzle and ignited. The luminance of the combustion is filtered by a light filter to remove non-S and P light signals, which are then converted into an electrical signal by the photomultiplier tube. This amplified electrical signal is sent to a recorder to detect the flame luminance. The overall structure is relatively simple, easy to operate, and improves practicality.

[0004] However, when this structure detects sulfide gases in the atmosphere, it cannot adjust the position of the filter and the flame to detect individual elements, thus failing to ensure that the detected combustion flame is in the optimal state. At the same time, a large amount of water vapor is generated during combustion, and although quartz glass is used to block it and prevent it from entering the photomultiplier tube, the blocked water vapor easily adheres to the area around the detector, making it inconvenient to clean. Therefore, a device for detecting trace amounts of sulfides in the atmosphere is proposed. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device for detecting trace amounts of sulfides in the atmosphere to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting trace amounts of sulfides in the atmosphere, comprising a sample inlet tube and a bottom chamber, one end of the sample inlet tube being connected to the bottom chamber, a sealing assembly being installed inside the bottom chamber, a combustion chamber being provided at the top of the sealing assembly, a connecting pipe being provided on one side of the combustion chamber, a photomultiplier tube being connected to one side of the connecting pipe, a voltage divider assembly being installed at one end of the photomultiplier tube, an adjustment assembly being connected between the photomultiplier tube and the connecting pipe, a top cover being installed at the top of the combustion chamber, and a water tank being connected to one side of the top cover.

[0007] By introducing hydrogen-rich gas through the inlet pipe and the sample gas to be tested through the sample delivery pipe, the gases are mixed in the mixing chamber, generating pressure. This pressure causes the baffle to compress the spring, opening the mixing chamber and connecting it to the ignition chamber. After ignition, the mixed gas burns in the combustion chamber. During combustion, the quartz glass blocks the generated water vapor, preventing it from entering the photomultiplier tube. Simultaneously, the motor rotates the lead screw, causing the slider to move the photomultiplier tube. This allows the filter at the end of the filter tube to move closer to or further away from the combustion chamber, optimizing the analysis of the flame sample's combustion state. This results in a clearer flame combustion curve and accurate detection of sulfur in the atmosphere. During combustion in the combustion chamber, the water vapor produced enters the water tank through the exhaust pipe and flows into the bottom of the water tank. The water vapor is condensed and collected, and the toxic and harmful soluble gases produced are absorbed. This prevents the water vapor and harmful gases produced during combustion from being directly released into the surrounding air, thus avoiding air pollution and improving the safety of the testing environment. At the same time, it prevents the formation of water mist and improves the visibility of the testing environment. After the test is completed, the water in the tank can be drained by opening the valve installed on the drain pipe.

[0008] Preferably, the sample inlet tube is connected to an air inlet tube and a sample delivery tube, the air inlet tube and the sample delivery tube are connected, and a mixing chamber is opened at the bottom of the bottom box, the air inlet tube and the mixing chamber are connected.

[0009] Preferably, the top of the sealing component is pressed against the top of the mixing chamber, the sealing component is connected to the top of the mixing chamber, and an ignition chamber is provided between the top of the sealing component and the combustion chamber.

[0010] Preferably, quartz glass is installed at the connection between the connecting pipe and the combustion chamber, and slots are symmetrically opened on the inner wall of the connecting pipe.

[0011] Preferably, one end of the photomultiplier tube is connected to a filter tube, a filter is installed at the end of the filter tube, and guide posts are symmetrically welded on the outside of the filter tube, with each guide post being inserted into a corresponding slot.

[0012] Preferably, a slider is welded to the outside of the photomultiplier tube, and the slider is connected and cooperates with the pitch adjustment component.

[0013] Preferably, the top of the cover is connected to an exhaust pipe, one end of which is inserted into the bottom of the water tank. The top of the water tank has an air outlet, and the bottom of the water tank is connected to a drain pipe with a valve installed on it.

[0014] Preferably, the pitch adjustment assembly includes a motor, which is mounted on one side of the connecting pipe.

[0015] The lead screw has one end connected to the motor drive end, and it is also connected to the slider.

[0016] A limit block is installed at the other end of the lead screw.

[0017] Preferably, the sealing assembly includes a plug rod, the bottom end of which is screwed into the bottom of the mixing chamber.

[0018] A baffle is welded to the top of the bolt.

[0019] The pressure plate is fitted onto the bolt rod.

[0020] A spring is fitted onto the bolt rod and positioned between the baffle and the pressure plate.

[0021] Preferably, a pressure groove is provided at the bottom of the ignition chamber, and the pressure plate is pressed into the pressure groove, and the diameter of the baffle is larger than the diameter of the spring.

[0022] The technical effects and advantages of this invention are as follows: 1. By setting up connecting pipes, slots, filter tubes, guide columns, sliders, motors, lead screws, and limit blocks, compared with existing technologies, the distance between the filter installed inside the filter tube and the combustion chamber can be adjusted, thereby enabling more accurate analysis of the flame state during sample combustion, making analysis more convenient. After the light waves filtered by the filter are converted by the photomultiplier tube, a clear detection curve can be obtained, thereby improving the accuracy of sulfur detection in the atmosphere. 2. By incorporating a top cover, exhaust pipe, water tank, air outlet, drain pipe, and quartz glass installed between the combustion chamber and the connecting pipe, compared to existing technologies, the quartz glass blocks the water vapor generated during sample combustion, preventing it from adhering to the filter. This allows for clearer refraction of the light waves generated by the combustion of sulfur in the atmosphere, thus avoiding interference with the converted light wave curve. Simultaneously, it collects the generated water vapor and absorbs the toxic and harmful gases produced during combustion, preventing the direct release of water vapor and harmful gases into the surrounding air, thereby avoiding air pollution and improving the safety of the testing environment. It also prevents the formation of water mist in the surrounding area. 3. By incorporating a mixing chamber, ignition chamber, throttle rod, pressure plate, and spring, compared to existing technologies, this method enables thorough mixing of the sample with hydrogen-rich gas, thereby improving the completeness of sample combustion. It also allows for immediate stopping and starting, preventing the continued flow of hydrogen-rich gas into the combustion chamber after testing, which could alter subsequent detection curves and thus further improve detection accuracy. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the bottom box of the present invention.

[0025] Figure 3 This is a schematic diagram of the sealing component of the present invention.

[0026] Figure 4 This is a schematic diagram of the connection structure of the adjustable distance component of the present invention.

[0027] Figure 5 This is a schematic diagram of the connection structure at both ends of the broadcast multiplier tube of the present invention.

[0028] Figure 6 This is a schematic diagram of the connection structure between the water tank and the exhaust pipe of the present invention.

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the water tank of the present invention.

[0030] The attached diagram is labeled as follows: 1. Sample inlet tube; 2. Base box; 3. Connecting tube; 4. Photomultiplier tube; 5. Pressure dividing assembly; 6. Adjustment assembly; 601. Motor; 602. Lead screw; 603. Limiting block; 7. Top cover; 8. Water tank; 9. Air inlet tube; 10. Sample delivery tube; 11. Mixing chamber; 12. Sealing assembly; 1201. Bolt; 1202. Baffle; 1203. Pressure plate; 1204. Spring; 13. Ignition chamber; 14. Combustion chamber; 15. Slider; 16. Filter tube; 17. Guide column; 18. Exhaust pipe; 19. Air outlet; 20. Drain pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] As attached Figure 1-7The device for detecting trace sulfides in the atmosphere shown includes a sample inlet tube 1 and a base chamber 2. One end of the sample inlet tube 1 is connected to the base chamber 2. A sealing assembly 12 is installed inside the base chamber 2. A combustion chamber 14 is located at the top of the sealing assembly 12. A connecting pipe 3 is located on one side of the combustion chamber 14. A photomultiplier tube 4 is connected to one side of the connecting pipe 3. A pressure dividing assembly 5 is installed at one end of the photomultiplier tube 4. An adjustment assembly 6 is connected between the photomultiplier tube 4 and the connecting pipe 3. A top cover 7 is installed at the top of the combustion chamber 14. A water tank 8 is connected to one side of the top cover 7. An air inlet pipe 9 and a sample delivery pipe 10 are connected to the sample inlet tube 1. The air inlet pipe 9 and the sample delivery pipe 10 are connected. A mixing chamber 11 is opened at the bottom of the base chamber 2. The air inlet pipe 9 and the mixing chamber 11 are connected. The top of the sealing assembly 12 is pressed against the top of the mixing chamber 11. The sealing assembly 12 is connected to the top of the inside of the mixing chamber 11, and an ignition chamber 13 is provided between the top of the sealing assembly 12 and the combustion chamber 14. Quartz glass is installed at the connection between the connecting pipe 3 and the combustion chamber 14, and slots are symmetrically opened on the inner wall of the connecting pipe 3. One end of the photomultiplier tube 4 is connected to a filter tube 16, and a filter is installed at the end of the filter tube 16. Guide posts 17 are symmetrically welded to the outside of the filter tube 16, and each guide post 17 is inserted into the corresponding slot. A slider 15 is welded to the outside of the photomultiplier tube 4, and the slider 15 is connected to the distance adjustment assembly 6. By introducing hydrogen-rich gas from the inlet pipe 9, the sample gas to be detected is sent from the sample delivery pipe 10. After mixing in the mixing chamber 11, air pressure is generated in the mixing chamber 11, causing the baffle 1202 to be compressed by the air pressure, thus opening the mixing chamber 11 and connecting it with the ignition chamber 13. After ignition, the mixed gas generates a flame in the combustion chamber 14 for combustion. During combustion, the quartz glass blocks the generated water vapor, preventing it from entering the photomultiplier tube 4. At the same time, the operation of the motor 601 causes the lead screw 602 to rotate, thereby causing the slider 15 to drag the photomultiplier tube 4 to move, allowing the filter installed at the end of the filter tube 16 to move closer to or further away from the combustion chamber 14, thus improving the optimal state for analyzing the combustion state of the flame sample. The combustion process in the combustion chamber 14 allows for a clearer determination of the sample's flame combustion curve, enabling precise detection of sulfur in the atmosphere. Water vapor generated during combustion enters the water tank 8 through the exhaust pipe 18, flowing to the bottom of the water tank 8 for condensation and collection. Simultaneously, it absorbs toxic and harmful soluble gases, preventing the direct release of combustion vapors and harmful gases into the surrounding air, thus avoiding air pollution and improving the safety of the testing environment. It also prevents the formation of water mist, enhancing visibility. After testing, the water in the water tank 8 can be drained by opening the valve installed on the drain pipe 20.

[0033] As attached Figure 6 and Figure 7As shown, the top of the top cover 7 is connected to an exhaust pipe 18, one end of which is inserted into the bottom of the water tank 8. The top of the water tank 8 is provided with an air outlet 19, and the bottom of the water tank 8 is connected to a drain pipe 20, on which a valve is installed.

[0034] The water vapor and toxic gases produced during combustion are introduced into the water tank 8 through the exhaust pipe 18. The water in the water tank 8 can condense and collect the water vapor and absorb the toxic gases, thereby preventing the water vapor and harmful gases produced during combustion from being directly discharged into the surrounding air, thus avoiding air pollution and improving the safety of the testing environment. At the same time, it can prevent the formation of water mist and improve the visibility of the testing environment. After the test is completed, the water in the water tank 8 can be drained by opening the valve installed on the drain pipe 20.

[0035] As attached Figure 4 As shown, the pitch adjustment assembly 6 includes a motor 601, which is mounted on one side of the connecting pipe 3.

[0036] The lead screw 602 is connected at one end to the transmission end of the motor 601, and the lead screw 602 is connected and engaged with the slider 15.

[0037] Limit block 603 is installed at the other end of lead screw 602.

[0038] The operation of motor 601 causes lead screw 602 to rotate, which in turn causes slider 15 to drag photomultiplier tube 4 to move, so that guide post 17 moves in slot, thereby adjusting the distance between filter and combustion chamber 14. This facilitates adjustment to the optimal state during flame analysis, making the detection curve clearer.

[0039] As attached Figure 2 and Figure 3 As shown, the sealing assembly 12 includes a plug rod 1201, the bottom end of which is screwed into the bottom of the mixing chamber 11.

[0040] Baffle 1202 is welded to the top of bolt 1201.

[0041] Pressure plate 1203 is sleeved on bolt 1201.

[0042] Spring 1204 is sleeved on bolt 1201 and is located between baffle 1202 and pressure plate 1203.

[0043] The bottom of the ignition chamber 13 is provided with a pressure groove, and the pressure plate 1203 is pressed and matched with the pressure groove. The diameter of the baffle 1202 is larger than the diameter of the spring 1204.

[0044] When the gas pressure inside the mixing chamber 11 increases, it exerts pressure on the pressure plate 1203, causing the spring 1204 to be compressed by the baffle 1202, thereby opening the mixing chamber 11. This allows the hydrogen-rich gas to mix thoroughly with the sample, ensuring complete combustion and improving the accuracy of sulfur detection in the sample. After the detection is completed and the sample feeding is stopped, the gas pressure inside the mixing chamber 11 decreases, causing the spring 1204 to rebound and press down on the pressure plate 1203, closing the mixing chamber 11 and promptly stopping combustion to prevent subsequent combustion flames from affecting the sample detection curve, thus further improving the accuracy of sulfur detection in the atmosphere.

[0045] Working principle of this invention: When using this atmospheric trace sulfide detection device to detect trace sulfides in the atmosphere, hydrogen-rich gas is introduced through the inlet pipe 9, and the sample gas to be detected is sent through the sample delivery pipe 10. After mixing in the mixing chamber 11, air pressure is generated in the mixing chamber 11, causing the baffle 1202 to be compressed by the air pressure, thus opening the mixing chamber 11 and connecting it with the ignition chamber 13. After ignition, the mixed gas generates a flame in the combustion chamber 14 for combustion. During combustion... During the process, the quartz glass blocks the generated water vapor, preventing it from entering the photomultiplier tube 4. At the same time, the operation of the motor 601 causes the lead screw 602 to rotate, thereby causing the slider 15 to drag the photomultiplier tube 4 to move. This allows the filter installed at the end of the filter tube 16 to move closer to or further away from the combustion chamber 14, thus improving the optimal state for analyzing the combustion state of the flame sample. This allows for a clearer determination of the sample flame combustion curve, thereby accurately detecting sulfur in the atmosphere. During combustion in the combustion chamber 14, the water vapor generated enters the water tank 8 through the exhaust pipe 18 and flows into the bottom of the water tank 8 to condense and collect the water vapor. At the same time, it absorbs the toxic and harmful soluble gases generated, thereby preventing the water vapor and harmful gases generated by combustion from being directly discharged into the surrounding air, thus avoiding pollution of the surrounding air and improving the safety of the testing environment. At the same time, it prevents the formation of water mist in the surrounding area and improves the visibility of the testing environment. After the test is completed, the water in the water tank 8 can be drained by opening the valve installed on the drain pipe 20.

[0046] The present invention has the advantages of being able to adjust the distance between the filter and the combustion chamber 14, thereby facilitating the adjustment of the optimal state for flame analysis of the sample in the combustion chamber 14. At the same time, it can collect the water vapor generated during the combustion process to avoid excessive humidity or fogging around the device, and absorb the toxic gases generated during the combustion process to prevent their emission. Thus, it can accurately detect trace amounts of sulfides in the atmosphere while reducing air pollution during the detection process.

[0047] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting trace amounts of sulfides in the atmosphere, comprising a sample inlet tube (1) and a bottom chamber (2), wherein one end of the sample inlet tube (1) is connected to the bottom chamber (2), characterized in that: The bottom box (2) is equipped with a sealing component (12), and a combustion chamber (14) is provided at the top of the sealing component (12). A connecting pipe (3) is provided on one side of the combustion chamber (14), and a photomultiplier tube (4) is connected to one side of the connecting pipe (3). A pressure dividing component (5) is installed at one end of the photomultiplier tube (4), and an adjustment component (6) is connected between the photomultiplier tube (4) and the connecting pipe (3). A top cover (7) is installed at the top of the combustion chamber (14), and a water tank (8) is connected to one side of the top cover (7). The top of the sealing component (12) is pressed against the top of the mixing chamber (11), the sealing component (12) is connected to the top of the inside of the mixing chamber (11), and an ignition chamber (13) is provided between the top of the sealing component (12) and the combustion chamber (14). One end of the photomultiplier tube (4) is connected to a filter tube (16), a filter is installed at the end of the filter tube (16), and guide posts (17) are symmetrically welded on the outside of the filter tube (16). Each guide post (17) is inserted into a corresponding slot. The top of the top cover (7) is connected to an exhaust pipe (18), one end of which is inserted into the bottom of the water tank (8), and an air outlet (19) is opened at the top of the water tank (8). The bottom of the water tank (8) is connected to a drain pipe (20), and a valve is installed on the drain pipe (20). The sealing assembly (12) includes a plug rod (1201), the bottom end of which is screwed into the bottom of the mixing chamber (11); A baffle (1202) is welded to the top of the bolt (1201); Pressure plate (1203), which is sleeved on bolt (1201); A spring (1204) is sleeved on a bolt (1201) and positioned between a baffle (1202) and a pressure plate (1203).

2. The device for detecting trace amounts of sulfides in the atmosphere according to claim 1, characterized in that: The sample inlet tube (1) is connected to an air inlet tube (9) and a sample delivery tube (10), the air inlet tube (9) and the sample delivery tube (10) are connected, and a mixing chamber (11) is opened at the bottom of the bottom box (2), the air inlet tube (9) and the mixing chamber (11) are connected.

3. The device for detecting trace amounts of sulfides in the atmosphere according to claim 1, characterized in that: Quartz glass is installed at the connection between the connecting pipe (3) and the combustion chamber (14), and slots are symmetrically opened on the inner wall of the connecting pipe (3).

4. The device for detecting trace amounts of sulfides in the atmosphere according to claim 1, characterized in that: A slider (15) is welded to the outside of the photomultiplier tube (4), and the slider (15) is connected and cooperates with the distance adjustment component (6).

5. The device for detecting trace amounts of sulfides in the atmosphere according to claim 1, characterized in that: The pitch adjustment assembly (6) includes a motor (601), which is mounted on one side of the connecting pipe (3); A lead screw (602) is provided, one end of which is connected to the transmission end of a motor (601), and the lead screw (602) is connected and cooperated with a slider (15). A limiting block (603) is installed at the other end of the lead screw (602).

6. The device for detecting trace amounts of sulfides in the atmosphere according to claim 1, characterized in that: The ignition chamber (13) has a pressure groove at the bottom, and the pressure plate (1203) is pressed into the pressure groove. The diameter of the baffle (1202) is larger than the diameter of the spring (1204).

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