An online water quality monitoring device for heavy metal mercury

Abstract

The present invention provides an on-line water quality monitoring device for heavy metal mercury, belonging to the technical field of water quality monitoring. The invention includes a device main body, a chassis and an Android screen are installed at the front end of the device main body, and a detection module, a sampling module and a mounting plate are arranged inside the device main body. It also includes: a gas-liquid separation component, an adaptive knocking component; the device realizes unattended and autonomous analysis and measurement, and is suitable for continuously monitoring the content of heavy metal mercury in water quality; through the synergistic effect of the fan blade, the spiral blade and the isolation cylinder, the gas-liquid separation process is accelerated, and an additional umbrella plate and a wire mesh demister are added. At the same time, the control of the electromagnet makes the sliding frequency of the spiral blade adjustable, optimizing the separation effect; the movement of the magnetic ring drives the rubber ball to knock the inner wall of the gas phase outlet pipe at the same time, effectively removing the liquid attached to the pipe wall, the umbrella plate and the wire mesh demister, keeping the pipe wall clean, avoiding blockage and pressure loss, improving the efficiency and quality of gas-liquid separation, and improving the monitoring accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and more particularly, to an on-line water quality monitoring device for heavy metal mercury. Background Art

[0002] With the rapid development of industrialization and urbanization, environmental pollution problems have become increasingly serious, especially heavy metal pollution has become a global environmental problem. As a toxic heavy metal element, mercury widely exists in nature and enters water bodies through various channels, posing a serious threat to water resources. In order to protect water resources and ensure water quality safety, it is particularly necessary to conduct on-line monitoring of heavy metal mercury.

[0003] In the existing monitoring equipment during gas-liquid separation, a part of the liquid will rise with the gas and adhere to the inner wall of the device. When the gas and liquid flow mixedly, due to their different densities, the liquid often deposits at the bottom to form a liquid phase, while the gas is located at the upper part to form a gas phase. However, in the actual separation process, due to the fluidity of the gas and the adhesiveness of the liquid, part of the liquid will be carried up by the gas and adhere to the inner wall of the separation device. The liquid adhering to the inner wall will have a negative impact on the gas-liquid separation effect. First of all, these liquids will occupy the effective space inside the device and reduce the separation efficiency. Secondly, the liquid adhering to the inner wall may also become a potential pollution source and have an adverse impact on subsequent gas treatment or emission.

[0004] How to invent an on-line water quality monitoring device for heavy metal mercury to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] To make up for the above deficiencies, the present invention provides an on-line water quality monitoring device for heavy metal mercury, aiming to solve the problems mentioned in the above background.

[0006] The present invention is implemented as follows:

[0007] The present invention provides an on-line water quality monitoring device for heavy metal mercury, including a device main body. A chassis and an Android screen are installed at the front end of the device main body. A detection module, a sampling module and a mounting plate are arranged inside the device main body. The sampling module includes a thermostat, a solid state relay, a light source board, a main control board, a valve group control board, a pneumatic valve, a peristaltic pump, a sampling loop, a carrier gas controller and a switching power supply. An air-liquid separator, a waste liquid valve, a reducing agent injection pump, a waste liquid pump, a sampling pump and a rotary valve are installed on the mounting plate. The detection module includes a hollow cathode lamp and an atomizer. The air-liquid separator is sequentially connected with a gas phase outlet pipe, an input pipe and a liquid phase outlet pipe from top to bottom. The lower end of the gas phase outlet pipe extends into the interior of the air-liquid separator. The end of the liquid phase outlet pipe is connected to the waste liquid valve. The rotary valve is an eight-way valve, and further includes:

[0008] Gas-liquid separation component: The gas-liquid separation component is arranged inside the gas-liquid separator. The gas-liquid separation component can prevent liquid from adhering to the inner wall of the gas-liquid separator and at the same time promote the mixing of the sample and the reducing agent;

[0009] Adaptive knocking component: The adaptive knocking component is arranged at the inlet end of the gas-phase outlet pipe. The adaptive knocking component can shake off the liquid adhering to the inner wall of the gas-phase outlet pipe to promote gas-liquid separation.

[0010] Preferably, both the reducing agent injection pump and the sample injection pump are syringe pumps. The equipment main body uses the sample injection pump for sampling, and cooperates with a rotary valve to select a specified sample for sampling. The sample injection pump makes a precisely quantified sample enter the sampling loop, and the reducing agent injection pump extracts a quantified potassium borohydride solution in the reducing agent bottle. Then, the peristaltic pump loads the sample in the sampling loop and the potassium borohydride solution extracted by the reducing agent injection pump into the gas-liquid separator for mixing reaction. The generated hydride gas is brought into the atomizer by the carrier gas controller for atomization, and the fluorescence intensity is detected by the detection module and then the result is displayed and processed by the computer.

[0011] Preferably, the gas-liquid separation component includes a mounting sleeve, a liquid separation plate, a spiral blade and an electromagnet. The electromagnet is fixedly sleeved on the lower side wall of the gas-phase outlet pipe. A slider is fixedly connected to the inner side of the spiral blade. A chute matching the slider is opened on the outer side wall of the gas-phase outlet pipe. The spiral blade is slidably sleeved on the outer side wall of the gas-phase outlet pipe through the cooperation of the slider and the chute. A snap ring is arranged inside the mounting sleeve. A slot matching the snap ring is arranged on the outer side wall of the gas-phase outlet pipe. The mounting sleeve is rotationally clamped on the gas-phase outlet pipe through the cooperation of the snap ring and the slot. A fan blade is fixedly connected to the side wall of the mounting sleeve. A separation cylinder is fixedly connected to the lower side wall edge of the fan blade far from the mounting sleeve.

[0012] Preferably, the spiral blade is below the fan blade and its edge abuts against the inner wall of the separation cylinder. A connecting spring is fixedly connected to the upper side wall of the electromagnet. The upper end of the connecting spring is fixedly connected with a magnetic ring. Both the magnetic ring and the connecting spring are slidably sleeved on the outside of the gas-phase outlet pipe.

[0013] Preferably, the outer side wall of the separation cylinder is rotationally attached to the inner wall of the gas-liquid separator. The upper end of the chute is below the fan blade, and the lower end of the chute extends below the magnetic ring.

[0014] Preferably, the lower end of the slider abuts against the upper side wall of the magnetic ring. The magnetism of the electromagnet when energized is the same as that of the magnetic ring. The electromagnet is electrically connected to the main control board and the switching power supply.

[0015] Preferably, the fan blade is at the same height as the input pipe. The liquid separation plate is fixedly connected to the inner wall of the gas-liquid separator. The liquid separation plate is provided with a leakage groove in a penetrating manner. The liquid separation plate is below the lower end of the electromagnet and above the upper end of the liquid phase outlet pipe.

[0016] Preferably, an umbrella plate and a wire mesh demister are sequentially installed in the gas phase outlet pipe above the magnetic ring from bottom to top. The umbrella plate is provided with through holes in a penetrating manner.

[0017] Preferably, the adaptive knocking assembly includes a connecting rod, a bending plate, a bending spring, and an installation groove formed in the inner wall of the gas phase outlet pipe. One end of the connecting rod is fixedly connected to the outer side wall of the magnetic ring, and the other end is fixedly connected with a connecting seat. The lower side wall of the bending plate is fixedly connected with a connecting plate. The bending plate is hinged to the connecting seat through the connecting plate. The lower end of the bending plate is hinged to the inner cavity of the installation groove. The upper end of the bending plate is fixedly connected with a rubber ball. The bending plate is elastically connected to the installation groove through the bending spring.

[0018] Preferably, the installation groove, the connecting rod, and the bending plate are annularly and equidistantly distributed along the central axis of the gas phase outlet pipe. The rubber ball is below the umbrella plate. In the initial state, the end face of the rubber ball abuts against the inner wall of the gas phase outlet pipe. The rubber ball is made of fluororubber.

[0019] The beneficial effects of the present invention are as follows:

[0020] This device is mainly applied to on-line water quality monitoring, especially the monitoring of heavy metal mercury. It realizes unattended and fully automatic independent analysis and measurement, is suitable for occasions that require continuous monitoring of heavy metal content in water quality, uses injection pump technology for sampling, has high metering accuracy, small cross-contamination between reagents, is equipped with a rotary valve, and can select specified samples for sampling, meeting the requirements for continuous monitoring of heavy metal content in water quality.

[0021] Through the synergistic effect of the fan blade, the spiral blade, and the isolation cylinder, the gas-liquid mixture is effectively separated. The isolation cylinder rotates driven by the fan blade, and in cooperation with the up-and-down sliding of the spiral blade, not only the liquid adhered to the isolation cylinder is peeled off, but also the collision between the mixture and the spiral blade and the isolation cylinder is promoted, thus accelerating the gas-liquid separation process; through the main control board, the on-off and on-off intensity of the electromagnet are controlled. This not only enables the spiral blade to maintain a balanced state when powered off, avoiding unnecessary sliding, but also can control the sliding frequency of the spiral blade by adjusting the current intensity, making the residence time of the mixture in the gas-liquid separator shorter and the separation efficiency higher. This flexibility enables the gas-liquid separation process to be optimized according to actual needs to achieve the best separation effect. The settings of the umbrella plate and the wire mesh demister further ensure the dryness of the discharged gas and improve the monitoring accuracy of the device.

[0022] While the magnetic ring is moving, the inner wall of the gas-phase outlet pipe is knocked by the rubber ball, effectively removing the liquid adhering to the pipe wall, umbrella plate and wire mesh demister. This knocking not only keeps the pipe wall clean, but also avoids blockage or pressure loss caused by liquid adhesion, improving the efficiency and quality of gas-liquid separation. By controlling the on-off and on-off intensity of the electromagnet, the force and frequency of the knocking action can be automatically adjusted. This adaptive characteristic reduces the vibration and noise of the equipment, improving the stability and reliability of the equipment. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall structure of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0025] Figure 2 It is a schematic diagram of the sampling module structure of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0026] Figure 3 It is a schematic diagram of the local structure installation of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0027] Figure 4 It is a schematic diagram of the internal structure of the detection module of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0028] Figure 5 It is a schematic diagram of the working process of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the gas-liquid separator of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0030] Figure 7 It is a schematic diagram of the internal structure of the gas-liquid separator of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0031] Figure 8 It is a schematic diagram of the partial sectional structure of the gas-liquid separator of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0032] Figure 9 It is a schematic diagram of the front view sectional structure of the gas-liquid separator of an on-line water quality monitoring device for heavy metal mercury provided by the present invention;

[0033] Figure 10 is an on-line water quality monitoring device for heavy metal mercury provided by the present invention Figure 9 Schematic enlarged structure diagram at position A in

[0034] Figure 11 is a schematic diagram of the gas-phase and liquid-phase flow directions of an on-line water quality monitoring device for heavy metal mercury provided by the present invention

[0035] Figure 12 is a schematic diagram of the connection structure between the spiral blade and the slider of an on-line water quality monitoring device for heavy metal mercury provided by the present invention

[0036] Figure 13 is a schematic diagram of the partial explosion structure of the adaptive knocking component of an on-line water quality monitoring device for heavy metal mercury provided by the present invention

[0037] In the figure: 1, device main body; 2, gas-liquid separator; 3, mounting sleeve; 4, liquid separation plate; 5, spiral blade; 6, electromagnet; 7, connecting rod; 8, connecting spring; 9, detection module; 10, sampling module; 11, mounting plate; 12, waste liquid valve; 13, reducing agent injection pump; 14, waste liquid pump; 15, sampling pump; 16, rotary valve; 21, input pipe; 22, gas-phase outlet pipe; 23, liquid-phase outlet pipe; 31, fan blade; 32, isolation cylinder; 51, slider; 71, connecting seat; 72, bending plate; 73, bending spring; 81, magnetic ring; 91, hollow cathode lamp; 92, atomizer; 221, umbrella plate; 222, wire mesh demister; 223, mounting groove; 721, connecting plate; 722, rubber ball. Specific embodiments

[0038] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] Example 1, refer to Figures 1-5, An on-line water quality monitoring device for heavy metal mercury, including a device main body 1. A chassis and an Android screen are installed at the front end of the device main body 1. A detection module 9, a sampling module 10 and a mounting plate 11 are arranged inside the device main body 1. The sampling module 10 includes a thermostat, a solid-state relay, a light source board, a main control board, a valve group control board, a pneumatic valve, a peristaltic pump, a sampling loop, a carrier gas controller and a switching power supply. A gas-liquid separator 2, a waste liquid valve 12, a reducing agent injection pump 13, a waste liquid pump 14, a sampling pump 15 and a rotary valve 16 are installed on the mounting plate 11. The detection module 9 includes a hollow cathode lamp 91 and an atomizer 92. The gas-liquid separator 2 is sequentially connected with a gas phase outlet pipe 22, an input pipe 21 and a liquid phase outlet pipe 23 from top to bottom. The lower end of the gas phase outlet pipe 22 extends into the interior of the gas-liquid separator 2. The end of the liquid phase outlet pipe 23 is connected to the waste liquid valve 12. The rotary valve 16 is an eight-way valve. Among them, water sample, standard sample and quality control are the measurement target substances in three different modes (refer to Figure 5 ). For water sample testing, water sample is introduced. For calibration verification, standard sample is introduced. For quality control mode inspection, quality control sample is introduced. The carrier liquid is introduced every time, but it will not be consumed. It only enters the metering loop when the sampling pump 15 performs metering for quantitative use. Waste liquid is generated every time. The waste liquid of the device product is hazardous waste and is collected through a waste liquid bottle. The cleaning liquid is used to clean the pipeline digestion chamber after the measurement is completed. It also includes:

[0040] Gas-liquid separation component: The gas-liquid separation component is arranged inside the gas-liquid separator 2. The gas-liquid separation component can prevent liquid from adhering to the inner wall of the gas-liquid separator 2 and at the same time promote the mixing of the sample and the reducing agent;

[0041] Adaptive knocking component: The adaptive knocking component is arranged at the inlet end of the gas phase outlet pipe 22. The adaptive knocking component can shake off the liquid adhering to the inner wall of the gas phase outlet pipe 22 to promote gas-liquid separation.

[0042] Furthermore, both the reducing agent injection pump 13 and the sampling pump 15 are syringe pumps, which have high metering accuracy and little cross-contamination between reagents, enabling automated continuous measurement. The main body of the device 1 uses the sampling pump 15 for sampling, and cooperates with the rotary valve 16 to select a specified sample for sampling. The sampling pump 15 makes the accurately quantified sample enter the sampling loop, and the reducing agent injection pump 13 extracts a quantified potassium borohydride solution from the reducing agent bottle. Subsequently, the peristaltic pump loads the sample in the sampling loop and the potassium borohydride solution extracted by the reducing agent injection pump 13 into the gas-liquid separator 2 for mixing and reaction. The generated hydride gas is carried by the carrier gas controller into the atomizer 92 for atomization, and the fluorescence intensity is detected by the detection module 9 and then the results are displayed and processed by the computer. The high-efficiency gas-liquid separation type hydride generator reacts the sample solution with the reducing agent to generate gaseous hydrides, then separates the hydride gas from the liquid through the gas-liquid separator 2, and finally sends it to the atomizer 92 or the ICP plasma torch for determination. The existing technology is basically applied in the laboratory, and this device mainly applies this technology to the automatic monitoring equipment, realizing unattended and fully automatic independent analysis and measurement.

[0043] In this embodiment, before the test, the instrument automatically extracts fresh samples and reagents to clean and fill the sampling pipeline, the measuring test tube and the gas-liquid separator 2 to ensure the representativeness of the samples. The instrument uses the syringe pump technology for sampling, and cooperates with the rotary valve 16 to select a specified sample for sampling. Precise quantification is carried out through the syringe pump, and it does not directly contact the samples and reagents. The sampling pump 15 makes the accurately quantified sample enter the sampling loop, and the reducing agent injection pump 13 extracts a quantified potassium borohydride solution from the reducing agent bottle. Subsequently, the peristaltic pump loads the sample in the sampling loop and the potassium borohydride solution extracted by the reducing agent injection pump 13 into the gas-liquid separator 2 for mixing and reaction. The generated hydride gas is carried by the carrier gas into the atomizer 92 for atomization. In the atomizer 92, there are reducing materials such as sodium, aluminum or zinc, and these materials react with acidic solutions (such as hydrochloric acid, sulfuric acid) under heating conditions to generate hydrogen or other hydride gases. The generated hydride gas then enters the gas-liquid separator 2. The gas-liquid separator 2 uses the density difference between the gas and the liquid and the hydrodynamic effect to separate the liquid in the gas. The hydride gas after gas-liquid separation is introduced into an analytical instrument (such as an atomic absorption instrument or an atomic fluorescence spectrometer) for measurement. The fluorescence intensity is detected by the detection system and then the results are displayed and processed by the computer; the instrument irradiates the characteristic radiation light emitted by the light source on the atomic vapor of the element to be measured. The electrons around the ground state atoms are excited to the high energy state. Since the electrons are unstable in the high energy state, when the electrons return to the ground state or other low energy states, they emit fluorescence outward, thereby performing quantitative analysis.

[0044] It should be noted that the wavelength of atomic fluorescence is in the ultraviolet and visible light regions. After gaseous free atoms absorb radiation of characteristic wavelengths, the outer electrons of the atoms transition from the ground state or low energy state to the high energy state. After about 10-8 seconds, they transition back to the ground state or low energy state, and at the same time emit fluorescence. If the wavelength of the atomic fluorescence is the same as the absorption line wavelength, it is called resonance fluorescence; if different, it is called non-resonance fluorescence. Resonance fluorescence has a strong intensity and is most commonly used in analysis. Under certain conditions, the intensity of resonance fluorescence is proportional to the concentration of a certain element in the sample. Taking arsenic and mercury elements as examples, in an acidic medium, with potassium borohydride as the reducing agent, in the digested sample solution, arsenic and mercury elements undergo chemical reactions to form corresponding arsine, while mercury elements are reduced to atomic mercury vapor. The chemical equations are as follows:

[0045] NaBH 4 +3H 2 O+H + =H 3 BO 3 +Na + +8[H]

[0046] 8[H]+2As 3+ =2AsH 3 ↑+H 2 ↑

[0047] 8[H]+Hg 2+ =Hg↑+3H2↑+2H +

[0048] After the excess hydrogen, arsine, and mercury vapor are mixed with argon, they enter the atomizer 92. The hydrogen and argon form a flame under the ignition device, and the arsenic and mercury elements to be measured are in an atomized state. The characteristic spectral lines emitted by arsenic and mercury are focused, and the ground state atoms become high energy states. During the process of converting back to the ground state, atomic fluorescence is emitted. The intensity of the emitted fluorescence is proportional to the concentration of arsenic and mercury in the sample. By comparison, the content of the corresponding arsenic and mercury elements in the sample can be obtained.

[0049] This device is mainly used for on-line water quality monitoring, especially for the monitoring of heavy metal mercury. It realizes unattended and fully automatic independent analysis and measurement, and is suitable for occasions that require continuous monitoring of heavy metal content in water quality. It uses injection pump technology for sample injection, with high metering accuracy and little cross-contamination between reagents. It is equipped with a rotary valve 16, which can select specified samples for injection, meeting the need for continuous monitoring of heavy metal content in water quality.

[0050] Example 2, refer to Figures 5-12The gas-liquid separation component includes a mounting sleeve 3, a liquid separator plate 4, a spiral blade 5 and an electromagnet 6. The electromagnet 6 is fixedly sleeved on the side wall of the lower end of the gas phase outlet pipe 22. A slider 51 is fixedly connected to the inner side of the spiral blade 5. A slide groove matching the slider 51 is provided on the outer wall of the gas phase outlet pipe 22. The spiral blade 5 is slidably sleeved on the outer wall of the gas phase outlet pipe 22 through the cooperation between the slider 51 and the slide groove. A clamping ring is provided inside the mounting sleeve 3. A clamping groove matching the clamping ring is provided on the outer wall of the gas phase outlet pipe 22. The mounting sleeve 3 is rotatably clamped on the gas phase outlet pipe 22 through the clamping ring and the clamping groove. The side wall of the mounting sleeve 3 is fixedly connected with a fan blade 31. An isolation cylinder 32 is fixedly connected to the edge of the lower side wall of the fan blade 31 away from the mounting sleeve 3.

[0051] Furthermore, the spiral blade 5 is below the fan blade 31 and its edge is against the inner wall of the isolation tube 32. The upper side wall of the electromagnet 6 is fixedly connected with a connecting spring 8, and the upper end of the connecting spring 8 is fixedly connected with a magnetic ring 81. The magnetic ring 81 and the connecting spring 8 are both slidably sleeved on the outside of the gas phase outlet pipe 22. When the gas-liquid mixed liquid flows to the spiral blade 5, it will move downward along the spiral blade 5. At the same time, the spiral blade 5 and the slider 51 will also move downward and gradually squeeze the connecting spring 8 through the magnetic ring 81; the outer wall of the isolation tube 32 rotates and fits with the inner wall of the gas-liquid separator 2 to ensure relative sealing. The upper end of the slide groove is below the fan blade 31, and the lower end of the slide groove extends to the bottom of the magnetic ring 81, which limits the up and down sliding range of the spiral blade 5.

[0052] It should be noted that the lower end of the slider 51 is against the upper side wall of the magnetic ring 81. When the spiral blade 5 moves downward, the slider 51 can effectively act on the magnetic ring 81, thereby squeezing the connecting spring 8, and the magnetic ring 81 and the electromagnet 6 will gradually approach each other. The magnetism of the electromagnet 6 when energized is the same as that of the magnetic ring 81. The electromagnet 6 is electrically connected to the main control board and the switching power supply. The main control board can control the on and off of the electromagnet 6 and the power intensity. As the magnetic ring 81 and the electromagnet 6 gradually approach each other, the repulsive force between the two will gradually increase, and the magnetic ring 81 will be repelled upward by the electromagnet 6, which will lift the spiral blade 5 upward. As the distance between the magnetic ring 81 and the electromagnet 6 increases, the repulsive force between the two will gradually increase, and the magnetic ring 81 will be repelled upward by the electromagnet 6, which will lift the spiral blade 5 upward. The magnetic force between the two decreases gradually. At this time, the spiral blade 5 continues to fall under the action of the mixed liquid and repeats the above process. During this process, the spiral blade 5 will slide up and down in the isolation tube 32, which will peel off the mixed liquid adhering to the isolation tube 32 and make it fall along the spiral blade 5. At the same time, the isolation tube 32 will also rotate under the drive of the fan blade 31. With the up and down sliding of the spiral blade 5, the collision between the mixture and the spiral blade 5 and the isolation tube 32 will be more frequent, which can not only promote the peeling of the liquid on the wall of the isolation tube 32, but also promote the separation of gas and liquid. Then, under the action of gravity, the liquid will automatically fall, and the gas will flow out from the gas phase outlet pipe 22.

[0053] The fan blade 31 is at the same height as the input pipe 21, ensuring that the gas-liquid mixture input through the input pipe 21 will first act on the fan blade 31 and then fall onto the spiral blade 5. When the gas-liquid mixture acts on the fan blade 31, it will drive the isolation cylinder 32 to rotate. Through the setting of the isolation cylinder 32, it is possible to prevent the mixed liquid from adhering to the inner wall of the gas-liquid separator 2. The liquid separation plate 4 is fixedly connected to the inner wall of the gas-liquid separator 2. The liquid separation plate 4 is provided with through slots. The liquid separation plate 4 is below the lower end of the electromagnet 6 and above the upper end of the liquid phase outlet pipe 23, ensuring that the separated liquid will first fall on the liquid separation plate 4 and then fall into the bottom of the gas-liquid separator 2 through the through slots, reducing the impact on the bottom wall of the gas-liquid separator 2.

[0054] Further, an umbrella plate 221 and a wire mesh demister 222 are sequentially installed in the gas phase outlet pipe 22 above the magnetic ring 81 from bottom to top. The umbrella plate 221 is provided with through holes. Through the settings of the umbrella plate 221 and the wire mesh demister 222, the gas flowing out through the gas phase outlet pipe 22 can be further dehumidified to strip the liquid therein. The gas will continue to be discharged, and the moisture in the gas will be blocked by the umbrella plate 221 and the wire mesh demister 222, and will automatically fall onto the liquid separation plate 4 after condensation and then slide to the bottom of the gas-liquid separator 2.

[0055] In this embodiment, the gas-liquid mixture (i.e., potassium borohydride solution and sample) enters the gas-liquid separator 2 through the input pipe 21. It will first impact the fan blade 31. After being impacted by the gas-liquid mixture, the fan blade 31 drives the installation sleeve 3 and the isolation cylinder 32 to rotate. Through the setting of the isolation cylinder 32, it is possible to prevent the mixed liquid from adhering to the inner wall of the gas-liquid separator 2. After the mixed liquid impacts the fan blade 31, it will flow towards the spiral blade 5 and move downward along it, which will cause the spiral blade 5 and the slider 51 to also move downward. At this time, the slider 51 squeezes the magnetic ring 81, compressing the connecting spring 8. The magnetic ring 81 gradually approaches the electromagnet 6. After the electromagnet 6 is energized, it generates the same magnetic property as the magnetic ring 81, and the repulsive force between the two increases. The magnetic ring 81 is repelled upward by the electromagnet 6, lifting the spiral blade 5 upward. As the distance between the magnetic ring 81 and the electromagnet 6 increases, the magnetic force decreases, and the spiral blade 5 continues to fall under the action of the mixed liquid, repeating the above process.

[0056] The spiral blade 5 slides up and down within the isolation cylinder 32 to strip the mixed liquid adhering to the isolation cylinder 32, causing it to fall along the spiral blade 5. Meanwhile, the isolation cylinder 32 rotates driven by the fan blade 31. In coordination with the up-and-down sliding of the spiral blade 5, the collision frequency between the mixture and the spiral blade 5 and the isolation cylinder 32 can be increased, promoting gas-liquid separation. The separated liquid automatically falls onto the liquid separation plate 4 under the action of gravity and then falls into the bottom of the gas-liquid separator 2 through the leakage trough. When the gas flows out through the gas-phase outlet pipe 22, it passes through the umbrella plate 221 and the wire mesh demister 222 for further dehumidification. The moisture is blocked by the umbrella plate 221 and the wire mesh demister 222, condenses and then automatically falls onto the liquid separation plate 4 and then slides to the bottom of the gas-liquid separator 2, and the dry gas continues to be discharged.

[0057] It should be noted that the main control board is electrically connected to the electromagnet 6 through a switching power supply and can control the on-off of the electromagnet 6. When the electromagnet 6 is powered off, it no longer generates a magnetic field, so the repulsive force between it and the magnetic ring 81 disappears. The spiral blade 5 slowly falls under the action of gravity or the mixed liquid and finally reaches equilibrium. At this time, the spiral blade 5 will not slide; the main control board can also control the energization intensity of the electromagnet 6, that is, the magnitude of the current. The greater the current, the stronger the magnetic field generated by the electromagnet 6, and the greater the repulsive force between it and the magnetic ring 81. By adjusting the current intensity, the magnitude of the repulsive force between the electromagnet 6 and the magnetic ring 81 can be accurately controlled, thereby adjusting the sliding frequency of the spiral blade 5. When the current intensity is appropriate, the repulsive force between the electromagnet 6 and the magnetic ring 81 will cause the spiral blade 5 to slide rapidly in the up-and-down direction. This sliding helps to strip the mixed liquid adhering to the isolation cylinder 32 and promotes gas-liquid separation. By accurately adjusting the current intensity, the sliding frequency of the spiral blade 5 can be optimized to achieve the best separation effect.

[0058] Through the synergistic effect of the fan blade 31, the spiral blade 5 and the isolation cylinder 32, the gas-liquid mixture is effectively separated. The isolation cylinder 32 rotates driven by the fan blade 31 and cooperates with the up-and-down sliding of the spiral blade 5, which not only strips the liquid adhered to the isolation cylinder 32, but also promotes the collision between the mixture and the spiral blade 5 and the isolation cylinder 32, thus accelerating the gas-liquid separation process. The main control board is electrically connected to the electromagnet 6 through a switching power supply, realizing the control of the power on / off and the power-on intensity of the electromagnet 6. This not only enables the spiral blade 5 to maintain a balanced state when powered off, avoiding unnecessary sliding, but also can control the sliding frequency of the spiral blade 5 by adjusting the current intensity, making the residence time of the mixture in the gas-liquid separator 2 shorter and the separation efficiency higher. This flexibility enables the gas-liquid separation process to be optimized according to actual needs to achieve the best separation effect. Since the designs of the fan blade 31 and the spiral blade 5 effectively prevent the mixed liquid from adhering to the inner wall of the gas-liquid separator 2, the cleaning and maintenance costs of the equipment are reduced. At the same time, the settings of the umbrella plate 221 and the wire mesh demister 222 further ensure the dryness of the discharged gas and improve the monitoring accuracy of the equipment.

[0059] Example three, refer to Figures 9-13 , the adaptive knocking component includes a connecting rod 7, a bent plate 72, a bent spring 73 and an installation groove 223 opened on the inner wall of the gas-phase outlet pipe 22. One end of the connecting rod 7 is fixedly connected to the outer side wall of the magnetic ring 81, and the other end is fixedly connected with a connecting seat 71. The lower side wall of the bent plate 72 is fixedly connected with a connecting plate 721. The bent plate 72 is hinged to the connecting seat 71 through the connecting plate 721. The lower end of the bent plate 72 is hinged to the inner cavity of the installation groove 223. The upper end of the bent plate 72 is fixedly connected with a rubber ball 722. The bent plate 72 is elastically connected to the installation groove 223 through the bent spring 73. When the bent plate 72 is pulled, the bent spring 73 will be stretched. When the pulling force disappears, the bent spring 73 will release the elastic force to reset the bent plate 72. When the magnetic ring 81 moves downward, the connecting rod 7 will pull the bent plate 72 to move through the connecting seat 71 and the connecting plate 721, so as to move the rubber ball 722. At this time, the bent spring 73 is in a stretched state.

[0060] It should be noted that the installation groove 223, the connecting rod 7 and the bent plate 72 are annularly and equidistantly distributed along the central axis of the gas-phase outlet pipe 22 to ensure uniform knocking force. The rubber ball 722 is located below the umbrella plate 221. In the initial state, the end face of the rubber ball 722 abuts against the inner wall of the gas-phase outlet pipe 22 to ensure that the rubber ball 722 can contact the inner wall of the gas-phase outlet pipe 22 when reset, thus generating knocking. The rubber ball 722 is made of fluororubber, which has excellent properties such as corrosion resistance, high temperature resistance and wear resistance, and the elasticity of the fluororubber is moderate, which can generate sufficient impact force during knocking without causing excessive impact damage.

[0061] In this embodiment, when the magnetic ring 81 moves downward, it will pull the bending plate 72 to move through the connecting rod 7 and the connecting seat 71. At this time, the bending spring 73 will be stretched, and the rubber ball 722 will leave the inner wall of the gas-phase outlet pipe 22 as the bending plate 72 moves. When the moving direction of the magnetic ring 81 changes, the bending spring 73 will release its elastic force, pushing the bending plate 72 to reset, and then the rubber ball 722 will strike the inner wall of the gas-phase outlet pipe 22. Through the knocking action of the rubber ball 722 on the inner wall of the gas-phase outlet pipe 22, the liquid attached to the pipe wall, the umbrella plate 221 and the wire mesh demister 222 can be effectively removed. This not only helps to keep the pipe wall clean, but also ensures that the gas can flow out smoothly, avoiding blockage or pressure loss caused by liquid attachment, which helps to improve the efficiency and quality of gas-liquid separation; by controlling the electromagnet 6, the knocking action can be automatically adjusted in terms of strength and frequency according to the movement of the magnetic ring 81. This adaptive characteristic helps to reduce the vibration and noise of the equipment and improve the stability and reliability of the equipment.

[0062] Since the installation grooves 223, the connecting rods 7 and the bending plates 72 are annularly and equidistantly distributed along the central axis of the gas-phase outlet pipe 22, when the rubber ball 722 strikes the inner wall of the gas-phase outlet pipe 22, the knocking force will be uniform, which helps to ensure that all parts of the gas-phase outlet pipe 22 can be struck to the same extent, thus avoiding local wear or deformation.

[0063] The control method of the present invention is automatically controlled by the main control board. The control circuit of the main control board can be realized by simple programming by those skilled in the art. The provision of the switching power supply also belongs to the common knowledge in the art. And the present invention mainly aims to protect the mechanical device, so the control method and circuit connection of the present invention will not be explained in detail.

[0064] It should be noted that the specific model specifications of the sample injection pump 15, the reducing agent injection pump 13 and the peristaltic pump need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the art, so it will not be elaborated in detail.

[0065] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An online water quality monitoring device for heavy metal mercury, comprising a device body (1), a front end of the device body (1) being equipped with a chassis and an Android screen, the device body (1) being internally provided with a detection module (9), a sampling module (10) and a mounting plate (11), the sampling module (10) comprising a temperature controller, a solid-state relay, a light source board, a main control board, a valve group control board, a pneumatic valve, a peristaltic pump, a sampling loop, a carrier gas controller and a switch power supply, the mounting plate (11) being equipped with a gas-liquid separator (2), a waste liquid valve (12), a reducing agent injection device (13), and a pressure relief valve (14). The gas-liquid separator (2) comprises a gas phase outlet pipe (22), an input pipe (21) and a liquid phase outlet pipe (23), wherein the lower end of the gas phase outlet pipe (22) extends to the interior of the gas-liquid separator (2), and the end of the liquid phase outlet pipe (23) is connected to the waste liquid valve (12). The rotary valve (16) is an eight-way valve, characterized in that: Also includes: Gas-liquid separation component: the gas-liquid separation component is arranged inside the gas-liquid separator (2); The gas-liquid separation component comprises a mounting sleeve (3), a liquid separation plate (4), a spiral blade (5) and an electromagnet (6); the electromagnet (6) is fixedly sleeved on the side wall of the lower end of the gas phase outlet pipe (22); a slider (51) is fixedly connected to the inner side of the spiral blade (5); a slide groove matching the slider (51) is provided on the outer side wall of the gas phase outlet pipe (22); the spiral blade (5) is slidably sleeved on the outer side wall of the gas phase outlet pipe (22) through the cooperation between the slider (51) and the slide groove A clamping ring is provided inside the installation sleeve (3), a clamping groove matching the clamping ring is provided on the outer side wall of the gas phase outlet pipe (22), the installation sleeve (3) is rotatably clamped on the gas phase outlet pipe (22) by the clamping ring and the clamping groove, a fan blade (31) is fixedly connected to the side wall of the installation sleeve (3), and an isolation cylinder (32) is fixedly connected to the edge of the lower side wall of the fan blade (31) away from the installation sleeve (3), and the fan blade (31) is at the same height as the input pipe (21); The spiral blade (5) is located below the fan blade (31) and its edge abuts against the inner wall of the isolation tube (32); the upper side wall of the electromagnet (6) is fixedly connected to a connecting spring (8); the upper end of the connecting spring (8) is fixedly connected to a magnetic ring (81); the magnetic ring (81) and the connecting spring (8) are both slidably sleeved on the outside of the gas phase outlet pipe (22); Adaptive knocking assembly: The adaptive knocking assembly is arranged at the inlet end of the gas phase outlet pipe (22).

2. The online water quality monitoring device for heavy metal mercury according to claim 1 is characterized in that: The reducing agent injection pump (13) and the sampling pump (15) are both syringe pumps. The device body (1) uses the sampling pump (15) to inject samples, and cooperates with the rotary valve (16) to select a specified sample for injection. The sampling pump (15) allows the accurately quantified sample to enter the sampling loop, and extracts a quantitative potassium borohydride solution in the reducing agent bottle through the reducing agent injection pump (13). Thereafter, the peristaltic pump carries the sample in the sampling loop and the potassium borohydride solution extracted by the reducing agent injection pump (13) into the gas-liquid separator (2) for mixed reaction. The generated hydride gas is brought into the atomizer (92) by the carrier gas controller for atomization, and the fluorescence intensity is detected by the detection module (9) and then displayed and processed by the computer.

3. The online water quality monitoring device for heavy metal mercury according to claim 1 is characterized in that: The outer wall of the isolation cylinder (32) is rotatably fitted to the inner wall of the gas-liquid separator (2), the upper end of the slide groove is located below the fan blade (31), and the lower end of the slide groove extends to below the magnetic ring (81).

4. The online water quality monitoring device for heavy metal mercury according to claim 1 is characterized in that: The lower end of the slider (51) abuts against the upper side wall of the magnetic ring (81); the magnetism of the electromagnet (6) when energized is the same as that of the magnetic ring (81); and the electromagnet (6) is electrically connected to the main control board and the switch power supply.

5. The online water quality monitoring device for heavy metal mercury according to claim 1 is characterized in that: The liquid separation plate (4) is fixedly connected to the inner wall of the gas-liquid separator (2), a leakage groove is provided through the liquid separation plate (4), and the liquid separation plate (4) is located below the lower end of the electromagnet (6) and above the upper end of the liquid phase outlet pipe (23).

6. The online water quality monitoring device for heavy metal mercury according to claim 1, characterized in that: An umbrella plate (221) and a wire mesh demister (222) are installed in sequence from bottom to top in the gas phase outlet pipe (22) located above the magnetic ring (81), and a through hole is formed through the umbrella plate (221).

7. The online water quality monitoring device for heavy metal mercury according to claim 1 is characterized in that: The adaptive knocking component comprises a connecting rod (7), a bending plate (72), a bending spring (73) and a mounting groove (223) provided on the inner wall of the gas phase outlet pipe (22); one end of the connecting rod (7) is fixedly connected to the outer wall of the magnetic ring (81), and the other end is fixedly connected to the connecting seat (71); the lower side wall of the bending plate (72) is fixedly connected to the connecting plate (721); the bending plate (72) is hinged to the connecting seat (71) via the connecting plate (721); the lower end of the bending plate (72) is hinged to the inner cavity of the mounting groove (223); the upper end of the bending plate (72) is fixedly connected to a rubber ball (722); and the bending plate (72) and the mounting groove (223) are elastically connected via the bending spring (73).

8. The online water quality monitoring device for heavy metal mercury according to claim 7 is characterized in that: The mounting groove (223), the connecting rod (7) and the bending plate (72) are equidistantly distributed in a ring along the central axis of the gas phase outlet pipe (22); the rubber ball (722) is located below the umbrella plate (221); the end surface of the rubber ball (722) in an initial state abuts against the inner wall of the gas phase outlet pipe (22); and the rubber ball (722) is made of fluororubber.

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