Water quality on-line monitoring equipment for heavy metal mercury

Abstract

The invention provides water quality on-line monitoring equipment for heavy metal mercury, and belongs to the technical field of water quality monitoring, the water quality on-line monitoring equipment comprises an equipment main body, the front end of the equipment main body is provided with a case and an Android screen, the equipment main body is internally provided with a detection module, a sample introduction module and a mounting plate, and the water quality on-line monitoring equipment further comprises a gas-liquid separation assembly and a self-adaptive knocking assembly; the equipment realizes unattended operation and autonomous analysis and measurement, and is suitable for continuously monitoring the content of heavy metal mercury in water; through the synergistic effect of the fan blades, the spiral blades and the isolation barrel, the gas-liquid separation process is accelerated, the umbrella plate and the wire mesh demister are additionally arranged, meanwhile, the sliding frequency of the spiral blades is adjustable through control of the electromagnet, and the separation effect is optimized; the magnetic ring moves and drives the rubber ball to knock the inner wall of the gas phase outlet pipe at the same time, so that liquid attached to the pipe wall, the umbrella plate and the wire mesh demister is effectively removed, the pipe wall is kept clean, blockage and pressure loss are avoided, the gas-liquid separation efficiency and quality are improved, and the monitoring precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and in particular to an online water quality monitoring device for heavy metal mercury. Background Art

[0002] With the rapid development of industrialization and urbanization, environmental pollution is becoming increasingly serious, especially heavy metal pollution has become a global environmental problem. Mercury, as a toxic heavy metal element, is widely present 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, online monitoring of heavy metal mercury is particularly necessary.

[0003] When the existing monitoring equipment separates gas and liquid, a part of the liquid will rise with the gas and adhere to the inner wall of the device. When the gas and liquid mix and flow, due to their different densities, the liquid tends to settle at the bottom to form a liquid phase, while the gas will be located at the top to form a gas phase. However, in the actual separation process, due to the fluidity of the gas and the adhesion 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 attached to the inner wall will have a negative impact on the gas-liquid separation effect. First, these liquids will occupy the effective space inside the device and reduce the separation efficiency. Secondly, the liquid attached to the inner wall may also become a potential source of pollution, which will have an adverse effect on subsequent gas treatment or discharge.

[0004] How to invent an online water quality monitoring device for heavy metal mercury to solve these problems has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides an online water quality monitoring device for heavy metal mercury, aiming to solve the problems mentioned in the above background.

[0006] The present invention is achieved in that: The present invention provides an online water quality monitoring device for heavy metal mercury, comprising a device body, a chassis and an Android screen are installed at the front end of the device body, a detection module, an injection module and a mounting plate are arranged inside the device body, the injection module comprises 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 ring, a carrier gas controller and a switch power supply, a gas-liquid separator, a waste liquid valve, a reducing agent injection pump, a waste liquid pump, an injection pump and a rotary valve are installed on the mounting board, the detection module comprises a hollow cathode lamp and an atomizer, the gas-liquid separator is connected with a gas phase outlet pipe, an input pipe and a liquid phase outlet pipe in sequence from top to bottom, the lower end of the gas phase outlet pipe extends to the inside of the gas-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 comprises: Gas-liquid separation component: The gas-liquid separation component is arranged inside the gas-liquid separator, and the gas-liquid separation component can prevent the liquid from adhering to the inner wall of the gas-liquid separator and can also promote the mixing of the sample and the reducing agent; Adaptive knocking assembly: The adaptive knocking assembly is arranged at the inlet end of the gas phase outlet pipe, and the adaptive knocking assembly can shake off the liquid adhered to the inner wall of the gas phase outlet pipe to promote gas-liquid separation.

[0007] Preferably, the reducing agent injection pump and the sampling pump are both syringe pumps. The device body uses the sampling pump to inject samples, and cooperates with the rotary valve to select the specified sample for injection. The sampling pump allows the accurately quantified sample to enter the sampling loop, and the reducing agent injection pump extracts a quantitative potassium borohydride solution in the reducing agent bottle. Thereafter, 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 mixed 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 displayed and processed by the computer.

[0008] Preferably, the gas-liquid separation component includes a mounting sleeve, a liquid separator plate, a spiral blade and an electromagnet, the electromagnet is fixedly sleeved on the side wall of the lower end of the gas phase outlet pipe, the inner side of the spiral blade is fixedly connected to a slider, the outer wall of the gas phase outlet pipe is provided with a slide groove matching the slider, the spiral blade is slidably sleeved on the outer wall of the gas phase outlet pipe through the cooperation of the slide groove and the slide, a retaining ring is provided inside the mounting sleeve, the outer wall of the gas phase outlet pipe is provided with a groove matching the retaining ring, the mounting sleeve is rotatably clamped on the gas phase outlet pipe through the cooperation of the retaining ring and the groove, the side wall of the mounting sleeve is fixedly connected to a fan blade, and an isolation cylinder is fixedly connected to the edge of the lower side wall of the fan blade away from the mounting sleeve.

[0009] Preferably, the spiral blade is located below the fan blade and its edge is against the inner wall of the isolation cylinder, the upper side wall of the electromagnet is fixedly connected with a connecting spring, the upper end of the connecting spring is fixedly connected with a magnetic ring, and the magnetic ring and the connecting spring are both slidably sleeved on the outside of the gas phase outlet pipe.

[0010] Preferably, the outer wall of the isolation cylinder is rotationally fitted with the inner wall of the gas-liquid separator, the upper end of the slide groove is below the fan blade, and the lower end of the slide groove extends to below the magnetic ring.

[0011] 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, and the electromagnet is electrically connected to the main control board and the switching power supply.

[0012] Preferably, the fan blades are at the same height as the input pipe, the liquid separator plate is fixedly connected to the inner wall of the gas-liquid separator, a leakage groove is provided through the liquid separator plate, and the liquid separator plate is located below the lower end of the electromagnet and above the upper end of the liquid phase outlet pipe.

[0013] Preferably, an umbrella plate and a wire mesh demister are installed in the gas phase outlet pipe located above the magnetic ring in sequence from bottom to top, and a through hole is formed through the umbrella plate.

[0014] Preferably, the adaptive knocking assembly includes a connecting rod, a bending plate, a bending spring and a mounting groove opened on the inner wall of the gas phase outlet pipe, one end of the connecting rod is fixedly connected to the outer wall of the magnetic ring, and the other end is fixedly connected to a connecting seat, the lower side wall of the bending plate is fixedly connected to 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 mounting groove, the upper end of the bending plate is fixedly connected to a rubber ball, and the bending plate and the mounting groove are elastically connected by a bending spring.

[0015] Preferably, the mounting groove, connecting rod and bending plate are equidistantly distributed in a ring along the central axis of the gas phase outlet pipe, the rubber ball is located below the umbrella plate, the end face of the rubber ball in the initial state abuts against the inner wall of the gas phase outlet pipe, and the rubber ball is made of fluororubber.

[0016] The beneficial effects of the present invention are: The equipment is mainly used for online monitoring of water quality, especially the monitoring of heavy metal mercury. It realizes unattended, fully automatic and autonomous analysis and measurement. It is suitable for occasions where continuous monitoring of heavy metal content in water quality is required. It uses injection pump technology for sampling, has high metering accuracy, and low cross-contamination between reagents. It is equipped with a rotary valve to select specified samples for injection, meeting the needs of continuous monitoring of heavy metal content in water quality.

[0017] Through the synergistic effect of the fan blades, spiral blades and isolation tube, the gas-liquid mixture is effectively separated. The isolation tube rotates driven by the fan blades and cooperates with the up and down sliding of the spiral blades, which not only peels off the liquid adhering to the isolation tube, but also promotes the collision between the mixture and the spiral blades and the isolation tube, thereby accelerating the gas-liquid separation process; the control of the on and off power and the power intensity of the electromagnet is realized through the main control board, which not only enables the spiral blades to maintain a balanced state when the power is off to avoid unnecessary sliding, but also can control the sliding frequency of the spiral blades by adjusting the current intensity, so that the residence time of the mixture in the gas-liquid separator is shorter and the separation efficiency is higher. This flexibility allows the gas-liquid separation process to be optimized according to actual needs to achieve the best separation effect. The setting of the umbrella plate and wire mesh demister further ensures the dryness of the exhaust gas and improves the monitoring accuracy of the equipment.

[0018] While the magnetic ring is moving, the rubber ball knocks against the inner wall of the gas phase outlet pipe, effectively removing the liquid attached 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 attachment, thereby improving the efficiency and quality of gas-liquid separation. By controlling the on and off power and power intensity of the electromagnet, the strength and frequency of the knocking action can be automatically adjusted. This adaptive feature reduces the vibration and noise of the equipment and improves the stability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of an online water quality monitoring device for heavy metal mercury provided by the present invention; Figure 2 This is a schematic diagram of the structure of a sampling module of an online water quality monitoring device for heavy metal mercury provided by the present invention; Figure 3 It is a schematic diagram of the partial structure installation of a water quality online monitoring device for heavy metal mercury provided by the present invention; Figure 4 This is a schematic diagram of the internal structure of a detection module of an online water quality monitoring device for heavy metal mercury provided by the present invention; Figure 5 This is a schematic diagram of the working process of an online water quality monitoring device for heavy metal mercury provided by the present invention; Figure 6 This is a schematic diagram of the structure of a gas-liquid separator of an online water quality monitoring device for heavy metal mercury provided by the present invention; Figure 7 This is a schematic diagram of the internal structure of a gas-liquid separator of an online water quality monitoring device for heavy metal mercury provided by the present invention; Figure 8 It is a partial cross-sectional structural schematic diagram of a gas-liquid separator of an online water quality monitoring device for heavy metal mercury provided by the present invention; Fig. 9 It is a schematic diagram of the front cross-sectional structure of a gas-liquid separator of an online water quality monitoring device for heavy metal mercury provided by the present invention; Fig.10 This invention provides an online water quality monitoring device for heavy metal mercury. Fig. 9 The enlarged structural diagram at A in the middle; Fig.11It is a schematic diagram of the gas phase and liquid phase flow directions of an online water quality monitoring device for heavy metal mercury provided by the present invention; Fig.12 It is a schematic diagram of the connection structure between the spiral blade and the slider of an online water quality monitoring device for heavy metal mercury provided by the present invention; Fig.13 It is a schematic diagram of the local explosion structure of an adaptive knocking component of an online water quality monitoring device for heavy metal mercury provided by the present invention.

[0021] In the figure: 1. Equipment body; 2. Gas-liquid separator; 3. Mounting sleeve; 4. Separating plate; 5. Spiral blade; 6. Electromagnet; 7. Connecting rod; 8. Connecting spring; 9. Detection module; 10. Injection module; 11. Mounting plate; 12. Waste liquid valve; 13. Reductant injection pump; 14. Waste liquid pump; 15. Injection pump; 16. Rotary valve; 21. Input pipe; 22. Gas phase outlet pipe; 23. Liquid phase outlet pipe; 31. Fan blade; 32. Isolation cylinder; 51. Sliding block; 71. Connecting seat; 72. Bending plate; 73. Bending spring; 81. Magnetic ring; 91. Hollow cathode lamp; 92. Atomizer; 221. Umbrella plate; 222. Silk screen demister; 223. Mounting groove; 721. Connecting plate; 722. Rubber ball. DETAILED DESCRIPTION

[0022] In order 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1, refer to Figure 1-Figure 5, an online monitoring device for water quality of heavy metal mercury, including a device body 1, a chassis and an Android screen are installed at the front end of the device body 1, a detection module 9, an injection module 10 and a mounting plate 11 are arranged inside the device body 1, the injection module 10 includes 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 ring, a carrier gas controller and a switch power supply, and a gas-liquid separator 2, a waste liquid valve 12, and a reducing agent injection pump 13 are installed on the mounting plate 11 , a waste liquid pump 14, a sample injection pump 15 and a rotary valve 16, the detection module 9 includes a hollow cathode lamp 91 and an atomizer 92, the gas-liquid separator 2 is 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 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, and the rotary valve 16 is an eight-way valve, wherein the water sample, the standard sample and the quality control are three different modes of measurement target substances (refer to Figure 5 ), water sample test is to feed water sample, calibration check is to feed standard sample, quality control mode check is to feed quality control sample, carrier liquid is fed every time, but it is not consumed, it only enters the quantitative loop when the sampling pump 15 is quantitative, and is used for quantitative purpose, waste liquid is generated every time, the waste liquid of the equipment product is hazardous waste, and is collected through the waste liquid bottle, the cleaning liquid is used to clean the pipeline digestion chamber after the measurement is completed, and also includes: Gas-liquid separation component: The gas-liquid separation component is arranged inside the gas-liquid separator 2. The gas-liquid separation component can prevent the liquid from adhering to the inner wall of the gas-liquid separator 2 and can also promote the mixing of the sample and the reducing agent; Adaptive knocking assembly: The adaptive knocking assembly is arranged at the inlet end of the gas phase outlet pipe 22. The adaptive knocking assembly can shake off the liquid adhered to the inner wall of the gas phase outlet pipe 22 to promote gas-liquid separation.

[0024] Furthermore, the reducing agent injection pump 13 and the sampling pump 15 are both syringe pumps, which have high metering accuracy, low cross contamination between reagents, and realize automatic continuous measurement. The equipment 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 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 mixed reaction, and the generated hydrogenated The material 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 the result is displayed and processed by the computer. The high-efficiency gas-liquid separation hydride generator generates gaseous hydride by reacting the sample solution with the reducing agent, and then separates the hydride gas from the liquid through the gas-liquid separator 2, and finally sends it to the atomizer 92 or ICP plasma torch for measurement. The existing technology is basically used in laboratories. This equipment mainly applies this technology to automatic monitoring equipment, realizing unmanned, fully automatic and autonomous analysis and measurement.

[0025] In this embodiment, before the test, the instrument automatically extracts fresh samples and reagents to clean and fill the sampling pipeline, measuring test tube and gas-liquid separator 2 to ensure that the sample is representative. The instrument uses the injection pump technology to inject samples, cooperates with the rotary valve 16 to select the specified sample for injection, and performs precise quantification through the injection pump without direct contact with the sample and reagent. The injection pump 15 allows the precisely 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 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 mixed reaction. The generated hydride gas is brought into the atomizer 92 by the carrier gas for atomization. The atomizer 92 is filled with reducing materials such as sodium, aluminum or zinc. Materials, these materials react with acidic solutions (such as hydrochloric acid, sulfuric acid) under heating conditions to generate hydrogen or other hydride gases, and the generated hydride gases then enter the gas-liquid separator 2, which uses the density difference between gas and liquid and the fluid dynamics effect to separate the liquid from 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, and the fluorescence intensity is detected by the detection system and then displayed and processed by a computer; the instrument is a light source that emits characteristic radiation light on the atomic vapor of the element to be measured, and the electrons around the ground state atoms are excited to a high energy state. Since the electrons are unstable in the high energy state, they radiate fluorescence when they return to the ground state or other low energy states, thereby performing quantitative analysis.

[0026] It should be noted that the wavelength of atomic fluorescence is in the ultraviolet and visible light regions. After the gaseous free atoms absorb the radiation of the characteristic wavelength, 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 to the ground state or low energy state again, and emit fluorescence at the same time. If the wavelength of atomic fluorescence is the same as the wavelength of the absorption line, it is called resonance fluorescence; if they are different, it is called non-resonance fluorescence; resonance fluorescence has a high intensity and is most widely 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 as an example, in acidic medium conditions, potassium borohydride is used as a reducing agent, and the arsenic and mercury elements in the digested sample solution undergo a chemical reaction to generate the corresponding arsenic hydrogen, and the mercury element is reduced to atomic mercury vapor. The chemical equation is as follows: NaBH4+3H2O+H + =H3BO3+Na + +8[H] 8[H]+2As 3+ =2AsH 3 ↑+H 2 ↑ 8[H]+Hg 2+ =Hg↑+3H2↑+2H + After excess hydrogen, arsine, and mercury vapor are mixed with argon, they enter the atomizer 92. 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. In the process of transforming 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. The equipment is mainly used for online monitoring of water quality, especially the monitoring of heavy metal mercury. It realizes unattended, fully automatic and autonomous analysis and measurement. It is suitable for occasions where continuous monitoring of heavy metal content in water quality is required. It uses injection pump technology for sampling, has high metering accuracy, and small cross-contamination between reagents. It is equipped with a rotary valve 16, which can select designated samples for sampling, meeting the needs of continuous monitoring of heavy metal content in water quality.

[0027] Example 2, refer to Figure 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.

[0028] 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.

[0029] 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.

[0030] The fan blades 31 are 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 blades 31 and then fall onto the spiral blades 5. When the gas-liquid mixture acts on the fan blades 31, it will drive the isolation tube 32 to rotate. Through the setting of the isolation tube 32, the mixed liquid can be prevented from adhering to the inner wall of the gas-liquid separator 2. The liquid separator plate 4 is fixedly connected to the inner wall of the gas-liquid separator 2, and a leakage groove is provided on the liquid separator plate 4. The liquid separator plate 4 is located 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 separator plate 4, and then fall into the bottom of the gas-liquid separator 2 through the leakage groove, thereby reducing the impact on the bottom wall of the gas-liquid separator 2.

[0031] Furthermore, an umbrella plate 221 and a wire mesh demister 222 are installed in the gas phase outlet pipe 22 located above the magnetic ring 81 from bottom to top. A through hole is provided on the umbrella plate 221. Through the arrangement 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 and the liquid therein can be stripped off. 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. After condensation, it will automatically fall onto the liquid separator plate 4 and then slide to the bottom of the gas-liquid separator 2.

[0032] 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, and it will first impact the fan blade 31. After being impacted by the gas-liquid mixture, the fan blade 31 drives the mounting sleeve 3 and the isolation cylinder 32 to rotate. The isolation cylinder 32 is provided 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 to the spiral blade 5 and move downward along it, which will cause the spiral blade 5 and the slider 51 to move downward as well. At this time, the slider 51 squeezes the magnetic ring 81 to compress the connecting spring 8, and the magnetic ring 81 gradually approaches the electromagnet 6. After the electromagnet 6 is energized, it generates the same magnetism as the magnetic ring 81, and the repulsive force between the two increases. The magnetic ring 81 is repelled upward by the electromagnet 6, and the spiral blade 5 is lifted 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, and the above process is repeated.

[0033] The spiral blade 5 slides up and down in the isolation tube 32, peeling off the mixed liquid adhered to the isolation tube 32 and making it fall along the spiral blade 5. At the same time, the isolation tube 32 rotates driven by the fan blade 31. In conjunction 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 tube 32 can be increased, thereby promoting gas-liquid separation. The separated liquid automatically falls onto the liquid separator plate 4 under the action of gravity, and then falls into the bottom of the gas-liquid separator 2 through the leakage groove. When the gas flows out through the gas phase outlet pipe 22, it is further dehumidified by the umbrella plate 221 and the wire mesh demister 222. The moisture is blocked by the umbrella plate 221 and the wire mesh demister 222, and automatically falls onto the liquid separator plate 4 after condensation, and then slides to the bottom of the gas-liquid separator 2, and the dry gas continues to be discharged.

[0034] 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 and 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, and the spiral blade 5 slowly falls under the action of gravity or the mixed liquid, and is finally in equilibrium. At this time, the spiral blade 5 will not slide; the main control board can also control the power intensity of the electromagnet 6, that is, the magnitude of the current. The larger the current, the stronger the magnetic field generated by the electromagnet 6, and the greater the repulsive force between the electromagnet 6 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 moderate, 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 directions. This sliding helps to peel off the mixed liquid adhering to the isolation cylinder 32 and promote 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.

[0035] Through the synergistic effect of the fan blades 31, the spiral blades 5 and the isolation tube 32, the gas-liquid mixture is effectively separated. The isolation tube 32 rotates under the drive of the fan blades 31, and cooperates with the up and down sliding of the spiral blades 5, which not only peels off the liquid adhering to the isolation tube 32, but also promotes the collision between the mixture and the spiral blades 5 and the isolation tube 32, thereby accelerating the gas-liquid separation process; the main control board is electrically connected to the electromagnet 6 through the switching power supply, and realizes the control of the power on and off and the power intensity of the electromagnet 6, which not only enables the spiral blade 5 to maintain a balanced state when the power is off, but also avoids unnecessary The sliding frequency of the spiral blade 5 can also be controlled by adjusting the current intensity, so that the residence time of the mixture in the gas-liquid separator 2 is shorter and the separation efficiency is higher. This flexibility allows the gas-liquid separation process to be optimized according to actual needs to achieve the best separation effect; since the design of the fan blade 31 and the spiral blade 5 effectively prevents 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 setting of the umbrella plate 221 and the wire mesh demister 222 further ensures the dryness of the exhaust gas and improves the monitoring accuracy of the equipment.

[0036] Example 3, refer to Figure 9-13 The adaptive knocking assembly includes 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 a connecting plate 721. The bending plate 72 is hinged to the connecting seat 71 through 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 fixed. A rubber ball 722 is connected, and the bending plate 72 and the mounting groove 223 are elastically connected by a bending spring 73. When the bending plate 72 is pulled, the bending spring 73 will be stretched; when the pulling force disappears, the bending spring 73 will release the elastic force to reset the bending plate 72. When the magnetic ring 81 moves downward, the connecting rod 7 will pull the bending plate 72 to move through the connecting seat 71 and the connecting plate 721, thereby moving the rubber ball 722. At this time, the bending spring 73 is in a stretched state.

[0037] It should be noted 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 to ensure uniform knocking force. The rubber ball 722 is located below the umbrella plate 221. The end face of the rubber ball 722 in the initial state is 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 resetting, thereby 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 fluororubber is moderate, which can generate sufficient impact force when knocking without causing excessive impact damage.

[0038] 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 the elastic force to push the bending plate 72 to reset, thereby causing the rubber ball 722 to knock on the inner wall of the gas phase outlet pipe 22. The knocking action of the rubber ball 722 on the inner wall of the gas phase outlet pipe 22 can effectively remove the liquid attached to the pipe wall, the umbrella plate 221 and the wire mesh demister 222, which 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 automatically adjust the 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.

[0039] Since the mounting groove 223, the connecting rod 7 and the bending plate 72 are all equidistantly distributed in a ring 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 striking force will remain uniform, which helps to ensure that each part of the gas phase outlet pipe 22 is struck to the same extent, thereby avoiding local wear or deformation.

[0040] The control method of the present invention is to automatically control through the main control board. The control circuit of the main control board can be realized by simple programming by technicians in this field. The provision of a switching power supply is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0041] It should be noted that the specific models and specifications of the sample injection pump 15, the reducing agent injection pump 13 and the peristaltic pump need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in 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); 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 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 mounting sleeve (3); a clamping groove matching the clamping ring is provided on the outer side wall of the gas phase outlet pipe (22); the mounting sleeve (3) is rotatably clamped on the gas phase outlet pipe (22) through the cooperation between the clamping ring and the clamping groove; a fan blade (31) is fixedly connected to the side wall of the mounting 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 mounting sleeve (3).

4. The online water quality monitoring device for heavy metal mercury according to claim 3 is characterized in that: The spiral blade (5) is located below the fan blade (31) and its edge abuts against the inner wall of the isolation tube (32); a connecting spring (8) is fixedly connected to the upper side wall of the electromagnet (6); a magnetic ring (81) is fixedly connected to the upper end of the connecting spring (8); and the magnetic ring (81) and the connecting spring (8) are both slidably sleeved on the outside of the gas phase outlet pipe (22).

5. The online water quality monitoring device for heavy metal mercury according to claim 4 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).

6. The online water quality monitoring device for heavy metal mercury according to claim 3 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.

7. The online water quality monitoring device for heavy metal mercury according to claim 3 is characterized in that: The fan blade (31) is at the same height as the input pipe (21), 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).

8. The online water quality monitoring device for heavy metal mercury according to claim 3 is 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).

9. The online water quality monitoring device for heavy metal mercury according to claim 4, 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).

10. The online water quality monitoring device for heavy metal mercury according to claim 9, 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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