Industrial waste salt fluoride integrated detection device and detection method

Abstract

The application discloses an industrial waste salt fluoride integrated detection device and a detection method, and belongs to the technical field of industrial waste salt detection. The device comprises an integrated cabinet body, and a pretreatment impurity removal unit, a sealed constant-temperature distillation unit, a condensation collection unit and a fluoride detection unit are sequentially and fixedly arranged in the cabinet body along a sample processing flow direction, and the units are in closed communication through a fully-sealed corrosion-resistant flow guide pipeline. The application realizes full-sealed sample circulation, impurity pre-removal and fluoride zero volatilization, and effectively improves the detection precision and the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of industrial waste salt detection technology, and in particular to an integrated detection device and method for fluoride in industrial waste salt. Background Technology

[0002] Industrial waste salt originates from industries such as chemical, fine chemical, pesticide, pharmaceutical, and water treatment. The waste salt matrix is ​​complex and generally contains high concentrations of salts, organic matter, heavy metals, chloride ions, sulfate ions, and other interfering substances. Among them, fluoride content is a key indicator for hazardous waste identification, resource utilization and disposal, and environmental emission control.

[0003] Currently, the detection of fluoride in industrial waste salts all employs a combination of separate equipment and manual pretreatment methods. This mainly relies on the individual coordination of distillation devices, ordinary reaction vessels, purification equipment, and ion detection equipment, and the existing equipment has significant structural defects. First, there is significant loss due to fluoride volatilization. Traditional distillation equipment has poor sealing, and fluorides easily escape with water vapor during heating, resulting in lower test results and poor repeatability.

[0004] Second, the high-salt matrix causes extremely strong interference. Existing equipment lacks a dedicated pre-treatment structure for impurity removal, allowing large amounts of salt crystals, colloids, and suspended impurities from industrial waste salt to enter the detection system, severely interfering with the fluoride ion electrode and ion chromatography detection signals.

[0005] Third, incomplete dissociation during distillation. Ordinary distillation vessels lack a constant temperature, pressure, and sealed structure, making it impossible to stably break down bound and encapsulated fluorides. As a result, sample dissociation is incomplete, leading to inaccurate test data.

[0006] Fourth, the equipment is scattered and pollution is serious. The pretreatment, distillation, purification and detection equipment are all independent, and the samples are transported openly multiple times, which makes them very easy to introduce external contamination and result in large human errors.

[0007] Fifth, poor corrosion resistance. Fluoride detection systems are highly corrosive, easily corroding, scaling, and damaging ordinary glass and metal structures, resulting in a short equipment lifespan.

[0008] The existing equipment mainly includes the following types: The first type is a separate distillation detection device, which is a manual combination of a regular distillation flask, heating mantle, container, and ion detector. This solution merely assembles the individual devices temporarily, without any integrated system structure.

[0009] The second type is a single distillation device, which only has the function of heating and distillation, without a pre-purification structure or a closed collection structure.

[0010] The third type is ordinary ion detection equipment, which is only responsible for end-point detection and has no sample pretreatment structure.

[0011] The equipment in the aforementioned prior art has the following drawbacks: it lacks a fully enclosed structure, resulting in significant losses due to fluoride volatilization; it lacks a dedicated purification structure for high-salt waste salt, making it impossible to eliminate matrix interference; it lacks a constant-temperature and pressure-stabilized distillation structure, leading to incomplete release of bound fluoride; the equipment is dispersed, cumbersome to transport, and carries a high risk of contamination; and the core structure has poor corrosion resistance, making it unsuitable for fluoride system testing environments.

[0012] In summary, traditional split-type equipment has an outdated structure, weak anti-interference, poor sealing, and low adaptability, which cannot meet the needs of accurate detection of fluoride in high-salt industrial waste. There is an urgent need for a dedicated detection device that is integrated, sealed, corrosion-resistant, and equipped with a pre-filter structure. Summary of the Invention

[0013] To address the structural defects of existing testing equipment, such as poor sealing, incomplete dissociation, significant interference from high salt levels, susceptibility to corrosion, and low integration, this invention provides an integrated detection device and method for fluoride in industrial waste salt. The device adopts an integrated cabinet structure, integrating sample impurity removal pretreatment, sealed constant temperature distillation, condensation collection, and stable detection functions. It achieves fully sealed sample flow, pre-removal of impurities, and zero volatilization of fluoride, thereby improving detection accuracy and equipment lifespan.

[0014] To achieve the above objectives, the present invention provides an integrated detection device for fluoride in industrial waste salt, comprising an integrated cabinet; The integrated cabinet is equipped with a pretreatment and impurity removal unit, a sealed constant temperature distillation unit, a condensation and collection unit, and a fluoride detection unit, which are fixedly arranged in sequence along the sample processing flow direction. The units are connected in a sealed manner through a fully sealed corrosion-resistant guide pipe. The integrated cabinet has an integrated control panel on its outer side; The bottom of the integrated cabinet is equipped with a sealed waste liquid collection box; The top of the integrated cabinet is equipped with a waste gas adsorption component.

[0015] Optionally, the pretreatment and impurity removal unit is a sealed chamber; The sealed chamber is equipped with a sealing door and sealing strips; The sealed chamber is equipped with a solid impurity filtration component, an organic matter adsorption component, and a high-salt pre-sedimentation component.

[0016] Optionally, the sealed constant temperature distillation unit includes a polytetrafluoroethylene distillation kettle, a constant temperature heating component, a pressure stabilizing gas inlet structure, a sealed feed port, and a pressure balancing valve. The polytetrafluoroethylene distillation vessel is made entirely of fluorine-resistant material and is completely sealed. The pressure balance valve is installed at the top to maintain stable pressure during the distillation process and prevent boiling and volatilization. The constant temperature heating component is installed at the bottom to achieve stable distillation and fully release bound and encapsulated fluorides.

[0017] Optionally, the condensation collection unit includes a spiral condenser tube, a sealed collection bottle, and a constant temperature receiving base; The upper end of the spiral condenser is sealed to the sealed constant temperature distillation unit, and the lower end extends into the sealed collection bottle, which is placed on the constant temperature receiving base.

[0018] Optionally, the fluoride detection unit is equipped with an ion detection station, an electrode positioning fixture, a shockproof operating table, and a light-shielding protective plate.

[0019] Optionally, the fully sealed corrosion-resistant conduit is used for the closed-loop transport of samples between units, and has the functions of corrosion prevention, volatilization prevention and leakage prevention. The integrated control panel is used for unified control of temperature, pressure, and equipment start-up and shutdown operations; The sealed waste liquid collection tank is used for centralized collection of corrosive waste liquid; The waste gas adsorption component is used to adsorb trace amounts of acidic volatile gases.

[0020] Secondly, the present invention provides an integrated detection method for fluoride in industrial waste salt, which employs the aforementioned integrated detection device for industrial waste salt and includes the following steps: Step 1: Sealed Pretreatment and Impurity Removal of Samples: The crushed and homogenized industrial waste salt sample to be tested is fed into the sealed chamber of the pretreatment and impurity removal unit through a sealed feeding port. The sealed door is closed to achieve a fully sealed pretreatment environment. The sample is then sequentially filtered by a solid impurity filter to trap solid particles and suspended impurities of the waste salt. A large molecular organic pollutant is adsorbed and removed from the sample by an organic matter adsorption component. Finally, a high-salt pre-sedimentation component is used to complete the static pre-sedimentation and separation of high-concentration salts, effectively eliminating the interference of high-salt matrix, impurities and organic matter on subsequent detection, resulting in a purified homogenized pretreated sample. Step 2: Sealed, Constant-Temperature, and Stable-Pressure Distillation and Dissociation: The pretreated sample is transported to the inside of a PTFE distillation vessel through a fully sealed, corrosion-resistant conduit. The feed port is locked to ensure absolute airtightness of the vessel. The constant-temperature heating component is activated through the integrated control panel of the cabinet to precisely heat the distillation vessel at a constant temperature. Simultaneously, a pressure-stabilizing gas supply structure continuously stabilizes the gas supply, and the pressure inside the vessel is automatically adjusted in real time by the top pressure balance valve to maintain a constant pressure during the distillation process, preventing sample boiling and fluoride volatilization and escape. Through the sealed, constant-temperature and stable-pressure distillation environment, the binding of salt crystal-encapsulated and bound fluorides is completely broken, allowing all forms of fluorides in the sample to completely dissociate and escape in gaseous form. Step 3: Fully enclosed, constant-temperature condensation and collection: The fluorine-containing gaseous components produced by distillation are introduced into the spiral condenser through a fully sealed, corrosion-resistant guide pipe. After sufficient heat exchange and condensation in the spiral condenser, the gaseous fluoride is completely converted into liquid condensate, which flows by gravity into a sealed collection bottle. The sealed collection bottle is placed on a constant-temperature receiving base throughout the process. Temperature control is used to prevent secondary volatilization of fluoride caused by temperature fluctuations in the condensate, thus achieving precise, lossless, and enclosed collection of the fluoride condensate. Step 4, Interference-resistant and precise fluoride detection: Transfer the collected sealed collection bottle to the ion detection station of the fluoride detection unit. Use electrode positioning clamps to precisely fix the detection electrode and the detection container to ensure stable and undisplaced detection position. Use the anti-vibration operating table to isolate external vibration interference and use a light-shielding plate to block ambient light interference. Complete the fluoride ion concentration detection in a stable, light-proof, and shockproof standard detection environment, record and output accurate detection data. Throughout the entire testing process, samples and reagents are transferred through fully sealed, corrosion-resistant pipelines, ensuring a closed and unexposed flow and completely avoiding contamination and errors caused by manual handling. Corrosive waste liquid generated by the distillation reaction is uniformly diverted to a sealed waste liquid collection tank for centralized storage and treatment. Trace amounts of acidic waste gas released during the operation are fully adsorbed and purified by the waste gas adsorption components on the top of the cabinet before being discharged in compliance with standards, ensuring a safe, environmentally friendly, and pollution-free testing process.

[0021] Compared with the prior art, the present invention has at least the following advantages: (1) Eliminate fluoride volatilization loss. The present invention adopts a fully enclosed distillation and condensation collection structure, with no open flow of samples throughout the process, which completely solves the problem of fluoride volatilization and escape, and greatly improves the detection accuracy.

[0022] (2) Extremely strong anti-interference ability. The present invention is equipped with a pre-removal unit, which can remove high salt, suspended impurities and organic matter in advance, greatly reducing matrix interference and adapting to complex industrial waste salt matrix.

[0023] (3) Complete dissociation of fluorides. The present invention adopts a pressure-stabilized, temperature-controlled, and sealed distillation structure, which can stably break down fluorine encapsulated in salt crystals and bound fluorine, ensuring the complete release of total fluorine.

[0024] (4) Corrosion resistant and long service life. The core distillation chamber of this invention is made of polytetrafluoroethylene, which is suitable for the highly corrosive working conditions of fluorine systems, and is not prone to scaling or damage.

[0025] (5) High integration and small error. The present invention has a fully integrated closed flow, which eliminates the need for multiple transfers, prevents external pollution, and ensures good data repeatability.

[0026] (6) Safety and environmental protection. This invention adopts a closed system for centralized collection of waste liquid and waste gas, with no corrosive leakage or toxic gas leakage, meeting laboratory safety standards. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the integrated detection device for fluorides in industrial waste salt according to the present invention.

[0028] Figure 2 This is a schematic diagram of the core distillation and condensation collection combination structure of the present invention.

[0029] 1. Integrated cabinet; 2. Pretreatment and impurity removal unit; 3. Sealed constant temperature distillation unit; 4. Condensation collection unit; 5. Fluoride detection unit; 6. Fully sealed corrosion-resistant guide pipe; 7. Integrated control panel; 8. Sealed waste liquid collection tank; 9. Waste gas adsorption component; 10. PTFE distillation kettle; 11. Constant temperature heating component; 12. Sealed feeding port; 13. Pressure balancing valve; 14. Spiral condenser tube; 15. Sealed collection bottle; 16. Constant temperature receiving base. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate to understand the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a product or device comprising a series of units is not necessarily limited to those explicitly listed, but may include other units not explicitly listed or inherent to such product or device.

[0032] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Example 1 like Figure 1 As shown, the integrated industrial waste salt fluoride detection device of the present invention includes an integrated cabinet 1. Inside the cabinet 1, along the sample processing flow direction, a pretreatment and impurity removal unit 2, a sealed constant temperature distillation unit 3, a condensation and collection unit 4, and a fluoride detection unit 5 are sequentially fixed. The units are connected in a sealed manner through a fully sealed corrosion-resistant conduit 6, achieving fully sealed sample transport without any open areas. An integrated control panel 7 is located on the outside of the cabinet 1, a sealed waste liquid collection tank 8 is located at the bottom of the cabinet 1, and a waste gas adsorption assembly 9 is located at the top of the cabinet 1.

[0037] Pretreatment and impurity removal unit 2 is a sealed chamber equipped with a sealing door and sealing strips. Inside the chamber are solid impurity filtration components, organic matter adsorption components, and high-salt pre-sedimentation components. This unit is used to pre-intercept waste salt particles, suspended impurities, and large molecular organic matter, reducing subsequent distillation pressure and structurally eliminating most matrix interference.

[0038] like Figure 2 As shown, the sealed constant-temperature distillation unit 3 includes a polytetrafluoroethylene (PTFE) distillation vessel 10, a constant-temperature heating component 11, a pressure-stabilizing gas inlet structure, a sealed feed port 12, and a pressure balancing valve 13. The distillation vessel 10 is entirely made of PTFE, making it suitable for fluorinated strong acid systems. The vessel body 10 is completely sealed, and a pressure balancing valve 13 is installed at the top to ensure stable pressure, prevent boiling over, and prevent volatilization during the distillation process. The constant-temperature heating component 11 is installed at the bottom to achieve stable distillation and fully release bound and encapsulated fluorides.

[0039] The condensation and collection unit 4 includes a spiral condenser 14, a sealed collection bottle 15, and a thermostatic receiving base 16. The upper end of the spiral condenser 14 is sealed to the gas outlet of the sealed thermostatic distillation unit 3, and the lower end extends into the sealed collection bottle 15. The sealed collection bottle 15 is placed on the thermostatic receiving base 16 to prevent shaking and spillage, thus achieving complete condensation of fluoride vapor with no volatilization loss.

[0040] The fluoride detection unit 5 is equipped with an ion detection station, electrode positioning fixtures, a shockproof operating table, and a light-shielding protective plate. The station structure is stable, which can fix the detection electrode and the detection container, avoid shaking and light interference, and ensure stable detection values.

[0041] The specific method for detecting fluoride in industrial waste salt using the above-mentioned device is as follows: First, the sample undergoes a sealed pretreatment process to remove impurities. The pulverized and homogenized industrial waste salt sample to be tested is fed into the sealed chamber of pretreatment unit 2 through a sealed feeding port, and the sealing door is closed to achieve a fully sealed pretreatment environment. The sample is then sequentially passed through a solid impurity filtration component to trap solid particles and suspended impurities of the waste salt, and through an organic matter adsorption component to adsorb and remove large molecular organic pollutants from the sample. Finally, a high-salt pre-sedimentation component completes the static pre-sedimentation and separation of high-concentration salts, effectively eliminating the interference of high-salt matrix, impurities, and organic matter on subsequent detection, resulting in a purified homogenized pretreated sample.

[0042] Then, a closed-loop, constant-temperature, and constant-pressure distillation process is performed. The pretreated sample is conveyed into the polytetrafluoroethylene (PTFE) distillation vessel 10 through a fully sealed, corrosion-resistant conduit 6, and the feed port 12 is locked to ensure absolute airtightness of the vessel. The constant-temperature heating component 11 is activated through the integrated control panel 7 of the integrated cabinet to precisely heat the distillation vessel 10 at a constant temperature. At the same time, the pressure-stabilizing gas supply structure continuously stabilizes the gas supply, and the pressure inside the vessel is automatically adjusted in real time by the top pressure balance valve 13 to maintain a constant pressure during the distillation process, preventing the sample from boiling over and the evaporation and escape of fluorides. Through the closed-loop distillation environment with constant temperature and pressure, the binding of salt crystal-encapsulated and bound fluorides is completely broken, allowing all forms of fluorides in the sample to completely dissociate and escape in gaseous form.

[0043] Subsequently, a fully sealed, constant-temperature condensation and collection process is performed. The fluorine-containing gaseous components produced by distillation are introduced into the spiral condenser 14 through a fully sealed, corrosion-resistant guide pipe 6. After sufficient heat exchange and condensation in the spiral condenser 14, the gaseous fluoride is completely converted into liquid condensate, which flows by gravity into the sealed collection bottle 15. The sealed collection bottle 15 is placed on the constant-temperature receiving base 16 throughout the process. By controlling the temperature, secondary volatilization of fluoride caused by temperature fluctuations in the condensate is avoided, thus achieving precise, lossless, and sealed collection of the fluoride condensate.

[0044] Finally, anti-interference and precise fluoride detection is performed. The collected sealed collection bottle 15 is transferred to the ion detection station of the fluoride detection unit 5. The detection electrode and the detection container are precisely fixed using an electrode positioning clamp to ensure that the detection position is stable and without deviation. External vibration interference is isolated by the anti-vibration operating table, and ambient light interference is blocked by a light-shielding protective plate. Fluoride ion concentration detection is completed in a stable, light-proof, and vibration-proof standard detection environment, and accurate detection data is recorded and output.

[0045] Throughout the entire testing process, samples and reagents are transferred through a fully sealed, corrosion-resistant conduit 6, ensuring a closed and unexposed flow without any openings or exposures, thus completely avoiding pollution and errors caused by manual handling. Corrosive waste liquid generated by the distillation reaction is uniformly diverted to a sealed waste liquid collection tank 8 for centralized storage and treatment. The trace amounts of acidic waste gas that escape during the operation are fully adsorbed and purified by the waste gas adsorption component 9 on the top of the cabinet before being discharged in compliance with standards, ensuring a safe and environmentally friendly testing process with no pollution leakage.

[0046] The device and method of the present invention, through an integrated and sealed design, achieves accurate detection of fluorides in industrial waste salts, effectively solving the core problems of fluoride volatilization, matrix interference, incomplete dissociation, and equipment corrosion in the prior art.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated detection device for fluoride in industrial waste salt, characterized in that, Includes integrated cabinetry; The integrated cabinet is equipped with a pretreatment and impurity removal unit, a sealed constant temperature distillation unit, a condensation and collection unit, and a fluoride detection unit, which are fixedly arranged in sequence along the sample processing flow direction. The units are connected in a sealed manner through a fully sealed corrosion-resistant guide pipe. The integrated cabinet has an integrated control panel on its outer side; The bottom of the integrated cabinet is equipped with a sealed waste liquid collection box; The top of the integrated cabinet is equipped with a waste gas adsorption component.

2. The integrated detection device for fluoride in industrial waste salt according to claim 1, characterized in that, The pretreatment and impurity removal unit is a sealed chamber; The sealed chamber is equipped with a sealing door and sealing strips; The sealed chamber is equipped with a solid impurity filtration component, an organic matter adsorption component, and a high-salt pre-sedimentation component.

3. The integrated detection device for fluoride in industrial waste salt according to claim 1, characterized in that, The sealed constant temperature distillation unit includes a polytetrafluoroethylene distillation kettle, a constant temperature heating component, a pressure stabilizing air inlet structure, a sealed feed port, and a pressure balancing valve. The polytetrafluoroethylene distillation vessel is made entirely of fluorine-resistant material and is completely sealed. The pressure balance valve is installed at the top to maintain stable pressure during the distillation process and prevent boiling and volatilization. The constant temperature heating component is installed at the bottom to achieve stable distillation and fully release bound and encapsulated fluorides.

4. The integrated detection device for fluoride in industrial waste salt according to claim 1, characterized in that, The condensation collection unit includes a spiral condenser tube, a sealed collection bottle, and a constant temperature receiving base; The upper end of the spiral condenser is sealed to the sealed constant temperature distillation unit, and the lower end extends into the sealed collection bottle, which is placed on the constant temperature receiving base.

5. The integrated detection device for fluoride in industrial waste salt according to claim 1, characterized in that, The fluoride detection unit is equipped with an ion detection station, an electrode positioning fixture, a shockproof operating table, and a light-shielding protective plate.

6. The integrated detection device for fluoride in industrial waste salt according to claim 1, characterized in that, The fully sealed corrosion-resistant guide pipe is used for the closed-loop transport of samples between units and has the functions of corrosion prevention, volatilization prevention and leakage prevention. The integrated control panel is used for unified control of temperature, pressure, and equipment start-up and shutdown operations; The sealed waste liquid collection tank is used for centralized collection of corrosive waste liquid; The waste gas adsorption component is used to adsorb trace amounts of acidic volatile gases.

7. An integrated detection method for fluoride in industrial waste salt, characterized in that, The method employs an integrated detection device for fluoride in industrial waste salt as described in any one of claims 1 to 6, comprising the following steps: Step 1: Sealed Pretreatment and Impurity Removal of Samples: The crushed and homogenized industrial waste salt sample to be tested is fed into the sealed chamber of the pretreatment and impurity removal unit through a sealed feeding port. The sealed door is closed to achieve a fully sealed pretreatment environment. The sample is then sequentially filtered by a solid impurity filter to trap solid particles and suspended impurities of the waste salt. A large molecular organic pollutant is adsorbed and removed from the sample by an organic matter adsorption component. Finally, a high-salt pre-sedimentation component is used to complete the static pre-sedimentation and separation of high-concentration salts, effectively eliminating the interference of high-salt matrix, impurities and organic matter on subsequent detection, resulting in a purified homogenized pretreated sample. Step 2: Sealed, Constant-Temperature, and Stable-Pressure Distillation and Dissociation: The pretreated sample is transported to the inside of a PTFE distillation vessel through a fully sealed, corrosion-resistant conduit. The feed port is locked to ensure absolute airtightness of the vessel. The constant-temperature heating component is activated through the integrated control panel of the cabinet to precisely heat the distillation vessel at a constant temperature. Simultaneously, a pressure-stabilizing gas supply structure continuously stabilizes the gas supply, and the pressure inside the vessel is automatically adjusted in real time by the top pressure balance valve to maintain a constant pressure during the distillation process, preventing sample boiling and fluoride volatilization and escape. Through the sealed, constant-temperature and stable-pressure distillation environment, the binding of salt crystal-encapsulated and bound fluorides is completely broken, allowing all forms of fluorides in the sample to completely dissociate and escape in gaseous form. Step 3: Fully enclosed, constant-temperature condensation and collection: The fluorine-containing gaseous components produced by distillation are introduced into the spiral condenser through a fully sealed, corrosion-resistant guide pipe. After sufficient heat exchange and condensation in the spiral condenser, the gaseous fluoride is completely converted into liquid condensate, which flows by gravity into a sealed collection bottle. The sealed collection bottle is placed on a constant-temperature receiving base throughout the process. Temperature control is used to prevent secondary volatilization of fluoride caused by temperature fluctuations in the condensate, thus achieving precise, lossless, and enclosed collection of the fluoride condensate. Step 4, Interference-resistant and precise fluoride detection: Transfer the collected sealed collection bottle to the ion detection station of the fluoride detection unit. Use electrode positioning clamps to precisely fix the detection electrode and the detection container to ensure stable and undisplaced detection position. Use the anti-vibration operating table to isolate external vibration interference and use a light-shielding plate to block ambient light interference. Complete the fluoride ion concentration detection in a stable, light-proof, and shockproof standard detection environment, record and output accurate detection data. Throughout the entire testing process, samples and reagents are transferred through fully sealed, corrosion-resistant pipelines, ensuring a closed and unexposed flow and completely avoiding contamination and errors caused by manual handling. Corrosive waste liquid generated by the distillation reaction is uniformly diverted to a sealed waste liquid collection tank for centralized storage and treatment. Trace amounts of acidic waste gas released during the operation are fully adsorbed and purified by the waste gas adsorption components on the top of the cabinet before being discharged in compliance with standards, ensuring a safe, environmentally friendly, and pollution-free testing process.

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