A device for enriching and treating fluoride and sulfide in water

Abstract

The present invention discloses a device for enriching and treating fluoride and sulfide in water, belonging to the technical field of water sample detection devices. The device of the present invention can be applied to the collection and enrichment of samples from different environmental water bodies such as rivers, lakes, and seas; through the adaptation of different pipelines, it can be used in conjunction with an external gas chromatograph to achieve the enrichment and treatment of trace volatile substances such as sulfur hexafluoride and trifluoromethyl sulfur pentafluoride in environmental water bodies; the device of the present invention changes the flow path by switching different valves, and the device can achieve a target concentration of 10 ‑15 ~10 ‑9 The device can enrich water samples in the mol / L range, enabling the enrichment of trace to minute amounts of target compounds. The sampling volume can be flexibly adjusted according to actual needs. The device has a simple structure, easy operation, and strong adaptability, meeting the detection needs of different experimental platforms such as onshore and onboard, and meeting the requirements of different concentration ranges.

Description

Technical Field

[0001] The invention belongs to the technical field of water sample detection devices, and in particular relates to a device for enriching and treating fluoride and sulfide in water. Background Art

[0002] Purge and trap is currently the mainstream method for extracting dissolved volatile substances from environmental water. Its core principle is to utilize the dynamic headspace principle. By continuously introducing a high-purity equilibrium gas (typically nitrogen or helium) into the water, the target compound is altered in the gas-liquid equilibrium, achieving separation from the water. The target compound is then concentrated and separated in a trapping tube under various conditions for detection.

[0003] The current mainstream purge and trap pretreatment is mainly aimed at conventional volatile substances, whose concentration range is generally 10 -6 ~10 -9 mol / L, which falls within the trace to constant range. The target capture conditions are not very demanding; generally, capture at -30°C to room temperature is sufficient. However, with the increasing demands of scientific research and environmental monitoring, the detection of certain atmospheric greenhouse gases, especially volatile substances such as fluorides and chlorides, is becoming increasingly important. This requires efficient enrichment and separation, but existing conventional purge and trap devices are no longer able to meet these requirements. Summary of the Invention

[0004] In view of the above-mentioned prior art, the present invention provides an enrichment and treatment device for fluoride sulfide in water to solve the technical problem that fluoride sulfide in water is difficult to enrich and separate.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is to provide an enrichment and treatment device for fluoride and sulfide in water, comprising a sampling part, a purge part and an enrichment part;

[0006] The injection part includes an injection syringe, and the outlet of the injection syringe is connected to the three-way valve through a hose provided with an on-off valve;

[0007] The purge section includes a purge pipe and a two-position six-way valve; the purge pipe includes a vaporization chamber, and the upper and lower ends of the vaporization chamber are respectively provided with a thin tube connected to the vaporization chamber and an air inlet, and the side wall of the vaporization chamber is provided with a liquid inlet, which is connected to the three-way valve, and the top of the thin tube is connected to a two-position four-way valve; the two-position four-way valve and the air inlet are respectively connected to two ports of the first two-position six-way valve, and the other port of the first two-position six-way valve is connected to an external purge gas tank;

[0008] The enrichment section includes a collecting tube and a temperature regulation system, which includes an insulation barrel, a controller, a heater and an inflation device; the insulation barrel includes an inner cavity and an outer cavity connected at the bottom, and the inner cavity and the outer cavity are filled with a cooling medium; the collecting tube is U-shaped, located in the inner cavity, and the bottom of the collecting tube is located above the liquid surface of the cooling medium. A temperature sensor is provided on its outer wall, and the interior is filled with a collecting material, and the temperature sensor is communicatively connected to the controller; the inflation device includes an inflation tank with a solenoid valve, the solenoid valve is connected to an inflation tube with a three-way solenoid valve, the end of the inflation tube extends into the outer cavity, and the top of the outer cavity is sealed; the solenoid valve and the three-way solenoid valve are both communicatively connected to the controller; metal two-way fittings with adapters are provided at both ends of the collecting tube, and the metal two-way fittings are connected to the heater. The adapter on the metal two-way fitting at one end of the collecting tube is connected to one port of the first two-way six-way valve through a pipeline provided with a second two-position six-way valve and a drying tube, and one port of the second two-position six-way valve is connected to the chromatographic equipment.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the sampling part also includes a fixed panel placed upright, and the sampling syringe is vertically fixed on the fixed panel with the outlet facing downward; a quantitative system is arranged above the sampling syringe, and the quantitative system includes a scale and a fixed clip, the fixed clip is fixed on the fixed panel, the scale is movably inserted in the fixed clip, and the lower end of the scale is connected to the push rod of the sampling syringe.

[0011] Furthermore, the purge tube is made of glass, and the vaporization chamber and the capillary tube are integrally formed.

[0012] Furthermore, the vaporization chamber has a length of 10 cm, an outer diameter of 5 cm, and a wall thickness of 1.5 mm; the capillary tube has a length of 50 to 60 cm, an outer diameter of 1 cm, and a wall thickness of 1.5 mm.

[0013] Furthermore, a sand core is provided inside the vaporization chamber, and the sand core is located below the liquid inlet; the sand pore diameter of the sand core is 10-15 μm.

[0014] Furthermore, the collecting tube is made of stainless steel, has a total length of 40-45 cm, an outer diameter of 3.175 mm, and an inner diameter of 2.5 mm.

[0015] Furthermore, there is a 10 cm gap between the collecting material filled in the collecting tube and both ends of the collecting tube.

[0016] Furthermore, the capture material is Hayes Sep. D filler, and its particle size is 80-100 mesh.

[0017] Furthermore, the adapter includes a stainless steel pipe and a plastic joint. The two ends of the stainless steel pipe are connected to the metal two-way valve and the plastic joint respectively. The pipeline provided with the second two-position six-way valve and the drying pipe is connected to the plastic joint.

[0018] Furthermore, the temperature adjustment system also includes a cooling device for cooling the cooling medium.

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

[0020] 1. The present invention provides a special sampling part for sampling, which can achieve stable and accurate sampling of water samples and can more accurately determine the fluoride and sulfide content in the water sample.

[0021] 2. The present invention provides a purge tube comprising a vaporization chamber and a capillary tube to purge the water sample. A sand core is provided in the vaporization chamber. After the water sample is injected into the purge tube, air flows through the sand core from the bottom under ventilation. The fine pores of the sand core break the gas into tiny bubbles. The sand core reduces the size of the small bubbles, increasing the contact time and area between the bubbles and the water sample, achieving a sufficient gas-liquid equilibrium. The target object can better enter the gas phase, significantly improving the purge effect. The capillary tube at the upper end of the vaporization chamber can prevent the problem of part of the water-gas mixture being carried into subsequent pipelines due to the existence of gas pressure.

[0022] 3. The present invention provides a temperature control system with an inflation device, which can flexibly adjust the liquid level of the cooling medium by inflation and deflation, thereby enabling the capture temperature of the capture tube to be adjusted quickly and effectively, thereby enabling the target substances in the purge gas to be effectively enriched and desorbed in the capture tube, thereby improving the detection accuracy of trace fluoride and sulfide in water samples.

[0023] 4. The processing device in the present invention can achieve capture and desorption temperatures in a wide temperature range, can meet the enrichment requirements of different target objects, can achieve effective enrichment of the target objects, and can achieve the purpose of step-by-step enrichment according to the different enrichment and desorption temperatures of the target objects.

[0024] 5. The device of the present invention can be applied to the sample collection and enrichment of different environmental water bodies such as rivers, lakes, and seas; through the adaptation of different pipelines, it can be used in conjunction with an external gas chromatograph to achieve the enrichment and treatment of trace volatile substances such as sulfur hexafluoride and trifluoromethyl sulfur pentafluoride in environmental water bodies; the device of the present invention can achieve the change of flow path by switching different valves, and the device can achieve the target concentration of 10 -15 ~10 -9 The device can enrich water samples in the mol / L range, enabling the enrichment of trace to minute amounts of target compounds. The sampling volume can be flexibly adjusted according to actual needs. The device has a simple structure, easy operation, and strong adaptability, meeting the detection needs of different experimental platforms such as onshore and onboard, and meeting the requirements of different concentration ranges. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a schematic diagram of the overall connection of a device for enriching and treating fluoride and sulfide in water;

[0026] Figure 2 This is the main view of the injection part;

[0027] Figure 3 This is the main view of the purge pipe;

[0028] Figure 4 It is a schematic diagram of the connection between the injection part and the purge part;

[0029] Figure 5 Schematic diagram of the connection of the enrichment part;

[0030] Figure 6 This is the main view of the capture tube;

[0031] Figure 7 It is a connection diagram of the injection part, purge part and enrichment part;

[0032] Figure 8 It is a schematic diagram of the flow path of the valves in the injection part and the purge part in the injection state;

[0033] Figure 9 Schematic diagram of the flow path of the injection part and the valve in the purge part in the purge state;

[0034] Figure 10 Schematic diagram of the flow paths of the valves in the injection section, purge section and enrichment section in the purge ready state;

[0035] Figure 11 Schematic diagram of the flow paths of the valves in the injection section, purge section and enrichment section when the purge is in progress;

[0036] Figure 12 Schematic diagram of the flow path of the valves in the injection part, purge part and enrichment part in the desorption state;

[0037] Among them, 1. injection part; 11. injection syringe; 12. switch valve; 13. fixed panel; 14. ruler; 15. fixed buckle;

[0038] 2. Purge unit; 21. Vaporization chamber; 22. Capillary tube; 23. Air inlet; 24. Liquid inlet; 25. Sand core;

[0039] 3. Enrichment unit; 31. Insulation barrel; 32. Capture tube; 33. Outer cavity; 34. Inner cavity; 35. Temperature sensor; 36. Controller; 37. Inflatable tank; 38. Solenoid valve; 39. Three-way solenoid valve; 310. Inflatable tube; 311. Heater; 312. Metal two-way valve; 313. Stainless steel tube; 314. Plastic joint; 315. Cooling device;

[0040] 4. Purge gas tank; 5. Chromatographic equipment; 6. Drying tube. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] The present invention discloses a device for enriching and treating fluoride and sulfide in water, the structure of which is as follows: Figures 1 to 7 As shown. The enrichment and treatment device for fluoride and sulfide in water comprises a sampling part 1, a purge part 2 and an enrichment part 3. The sampling part 1 comprises a sampling syringe 11, the outlet of which is connected to a three-way valve V1 via a hose provided with a switch valve 12. In a preferred embodiment of the present invention, in order to make the sampling more stable and accurate, the sampling part 1 is configured as follows: Figure 2 The structure shown includes a fixed panel 13 placed upright, and the sampling syringe 11 is vertically fixed on the fixed panel 13 with the outlet facing downward; a quantitative system is provided above the sampling syringe 11, and the quantitative system includes a scale 14 and a fixed buckle 15, the fixed buckle 15 is fixed on the fixed panel 13, and the scale 14 is movably inserted in the fixed buckle 15, and the lower end of the scale 14 is connected to the push rod of the sampling syringe 11; the scale 14 has a scale and can move up and down in the fixed buckle 15. During the sampling process, the scale 14 is pushed, and the scale 14 pushes the push rod of the sampling syringe 11, so that the water sample in the sampling syringe 11 is injected into the vaporization chamber 21, and the volume of the water sample can be converted by the distance pushed by the scale 14; the push of the scale 14 can be achieved manually or with the help of an automated pushing device such as an electric telescopic rod.

[0043] like Figure 1 、 3 As shown in Figures 4 and 7, the purge section 2 includes a purge tube and a two-position, six-way valve V3. The purge tube is made of glass and includes a vaporization chamber 21. A capillary tube 22 and an air inlet 23 are provided at the upper and lower ends of the vaporization chamber 21, respectively, communicating with the vaporization chamber 21. The vaporization chamber 21 is 10 cm long, 5 cm in outer diameter, and 1.5 mm thick. The capillary tube 22 is 50-60 cm long, 1 cm in outer diameter, and 1.5 mm thick. To ensure connection stability and airtightness, the vaporization chamber 21 and capillary tube 22 are integrally formed. A liquid inlet 24 is provided on the sidewall of the vaporization chamber 21, which is connected to the three-way valve V1. In a preferred embodiment of the present invention, a sand core 25 is provided within the vaporization chamber 21 to generate more and smaller bubbles when the purge gas enters the vaporization chamber 21. The sand core 25 is located below the liquid inlet 24 and has a pore size of 10-15 μm. A two-position four-way valve V2 is connected to the top of the capillary 22; the two-position four-way valve V2 and the air inlet 23 are respectively connected to two ports in the first two-position six-way valve V3, and the other port in the first two-position six-way valve V3 is connected to an external purge gas tank 4, which is filled with pure purge gas.

[0044] like Figure 1 、 5 , 6 and 7, the enrichment section 3 includes a collection tube 32 and a temperature control system; the temperature control system includes an insulation barrel 31, a controller 36, a heater 311 and an inflation device; the insulation barrel 3 is cylindrical, and its internal space is divided into an inner cavity 34 and an outer cavity 33 connected at the bottom, and the inner cavity 34 and the outer cavity 33 are filled with a cooling medium (anhydrous ethanol, liquid nitrogen, etc.); the collection tube 32 is located in the inner cavity 34, which is U-shaped and is preferably made of stainless steel tube with a total length of 40 to 45 cm, an outer diameter of 3.175 mm, and an inner diameter of 2.5 mm; before the fluoride sulfide is captured, the bottom of the collection tube 32 is located above the liquid surface of the cooling medium; the outer wall of the collection tube 32 is provided with a temperature sensor 35, and the interior is filled with a collection material, and the collection material is preferably Hayes Sep.D filler, its particle size is 80~100 mesh, the temperature sensor 35 is connected to the controller 36 in communication, the controller 36 is a controller that can receive temperature signals and send electromagnetic valve switching signals, such as a PCL controller. The inflation device includes an inflation tank 37 with a solenoid valve 38, the solenoid valve 38 is connected to an inflation tube 310 with a three-way solenoid valve 39, the end of the inflation tube 310 extends into the outer cavity 33, and the top of the outer cavity 33 is sealed; the solenoid valve 38 and the three-way solenoid valve 39 are both connected to the controller 36 in communication; the two ends of the collection tube 32 are provided with a metal two-way adapter 312, the metal two-way adapter 312 is connected to the heater 311, the heater 311 is preferably an electric heater, the positive and negative poles of the electric heater are respectively connected to the two metal two-way adapters 312, The capture tube 32 is made of stainless steel, and the electric heater can heat the entire capture tube 32 when powered. The adapter includes a stainless steel tube 313 and a plastic connector 314 (made of PEEK), with the two ends of the stainless steel tube 313 connected to the metal union 312 and the plastic connector 314, respectively. The plastic connector 314, connected to one end of the capture tube 32, is connected to one port of the first two-position six-way valve V3 via a pipeline equipped with a second two-position six-way valve V4 and a drying tube 6. One port of the second two-position six-way valve V4 is connected to the chromatographic device 5. In a preferred embodiment of the present invention, to ensure that the cooling medium can repeatedly exert its cooling effect, the temperature control system also includes a cooling device 315 for cooling the cooling medium. Cooling device 315 can be a refrigerator, with a cooling probe extending into the cooling medium. After the cooling medium absorbs heat and its temperature rises, cooling device 315 is activated to cool the cooling medium.

[0045] The process of enriching fluoride and sulfide in water using the enrichment and treatment device for fluoride and sulfide in water of the present invention is as follows:

[0046] Connect the components according to the connection mode, and then adjust the flow path direction of the three-way valve V1, the two-position four-way valve V2 and the first two-position six-way valve V3 to Figure 7In the state (ready state), the black solid line in the valve indicates that the gas path is connected. At this time, the three ports of the purge tube are in a closed state and are not connected to the external gas path, ensuring that impurities such as external air do not enter the system; open the switch valve 12, and the water sample in the injection syringe 11 (containing fluorinated sulfides such as sulfur hexafluoride and trifluoromethyl sulfur pentafluoride) is slowly injected into the three-way valve V1 and emptied through the right pipeline. The emptied volume is controlled at 20~30mL. The water sample will rinse the pipeline space connecting the injection syringe 11 and the three-way valve V1, and empty the residual air between the pipelines after the injection syringe 11 is installed to avoid sample contamination.

[0047] When the water sample is rinsed, close the switch valve 12, and then adjust the flow path direction of the three-way valve V1, the two-position four-way valve V2 and the first two-position six-way valve V3 to Figure 8 The sample is in the middle state (injection state). Then, switch valve 12 is opened, and the water sample in injection syringe 11 flows through three-way valve V1 into vaporization chamber 21 of the purge tube. After the prescribed amount of water sample is injected, switch valve 12 is closed. Then, three-way valve V1 and two-position four-way valve V2 are switched to the ready state. The combined use of two-position four-way valve V2 and three-way valve V1 ensures that the sample injection process is not interfered with by residual air.

[0048] The three-way valve V1 and the two-position four-way valve V2 remain in their original state (ready state), and the flow path of the first two-position six-way valve V3 is switched to Figure 9 The state (purging state) allows the purge gas in the purge gas tank 4 to enter the purge pipe through the first two-position six-way valve V3 to achieve water sample purging. The air flow passes through the sand core 25 from the bottom. Under the action of the small pore size of the sand core 25, the gas will be broken into small bubbles; the bubbles flow upward under pressure, pass through the water sample, enter the upper capillary 22, and then flow out of the purge pipe. The sand core 25 reduces the bubble size as much as possible, so that the contact time and area of ​​the bubbles and the water sample are increased, achieving a full gas-liquid equilibrium effect, and the target (sulfur hexafluoride and trifluoromethyl sulfur pentafluoride and other fluorosulfides) can better enter the gas phase; the purge gas containing the target flows out through the two-position four-way valve V2, and then flows out through the first two-position six-way valve V3, enters the drying pipe 6 to remove impurities such as moisture, and then enters the subsequent enrichment part 3 for capture and desorption.

[0049] After the purge gas containing the target object flows out of the two-position four-way valve V2, adjust the flow path direction of the three-way valve V1, the two-position four-way valve V2, the first two-position six-way valve V3 and the second two-position six-way valve V4 to Figure 10Then, the solenoid valve 38 on the charging tank 37 and the three-way solenoid valve 39 on the charging pipe 310 are opened to inject compressed air into the outer cavity 33. The cooling medium in the outer cavity 33 enters the inner cavity 34 under the action of pressure, thereby causing the liquid level of the cooling medium in the inner cavity 34 to rise until it submerges the collecting pipe 32. The ventilation is stopped, and the three-way solenoid valve 39 is closed to pre-cool the collecting pipe 32.

[0050] After precooling for 1 minute, adjust the flow path direction of the three-way valve V1, the two-position four-way valve V2, the first two-position six-way valve V3 and the second two-position six-way valve V4 to Figure 11 In this state, the purge gas passes through the first two-position six-way valve V3, then enters the purge pipe, then flows out of the two-position four-way valve V2, enters the first two-position six-way valve V3 again, then passes through the drying pipe 6 to remove moisture in the gas, and then passes through the second two-position six-way valve V4 into the capture pipe 32. At low temperature, the target object is adsorbed and retained by the filler, while the remaining gas flows out of the capture pipe 32 and is discharged.

[0051] The temperature sensor 35 monitors the temperature of the collection tube 32. When the target material is continuously enriched at low temperature in the collection tube 32 and reaches the required level, the controller 36 controls the pressure relief port of the three-way solenoid valve 39 to open, and the pressure generated in the outer chamber 33 is released, and the liquid levels in the inner chamber 34 and the outer chamber 33 return to normal pressure. At this time, the flow path direction of the three-way valve V1, the two-position four-way valve V2, the first two-position six-way valve V3 and the second two-position six-way valve V4 is adjusted to Figure 12 In this state (desorption state), the first two-position six-way valve V3 is switched to the original position (purge ready state), the compressed air in the outer chamber 33 is emptied, the cooling medium liquid level returns to its original position, the capture tube 32 is no longer maintained at a low temperature, the heater 311 is started to heat the capture tube 32, and when the temperature of the capture tube 32 reaches the preset temperature (90°C), the external gas path is switched, and the desorbed gas enters through the right side of the capture tube 32 ( Figure 12 The liquid flows out of the collecting tube 32 (on the right side of the collecting tube 32), passes through the second two-position six-way valve V4, and enters the chromatographic device 5 for separation.

[0052] Although the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A device for enriching and treating fluoride and sulfide in water, characterized by: It comprises a sample injection part (1), a purge part (2) and an enrichment part (3); The injection part (1) includes an injection syringe (11), and the outlet of the injection syringe (11) is connected to a three-way valve (V1) via a hose provided with an on-off valve (12); The purge portion (2) includes a purge pipe and a two-position six-way valve (V3); the purge pipe includes a vaporization chamber (21); the upper and lower ends of the vaporization chamber (21) are respectively provided with a thin tube (22) and an air inlet (23) communicating with the vaporization chamber (21); a side wall of the vaporization chamber (21) is provided with a liquid inlet (24); the liquid inlet (24) is connected to the three-way valve (V1); the top of the thin tube (22) is connected to a two-position four-way valve (V2); the two-position four-way valve (V2) and the air inlet (23) are respectively connected to two ports in the first two-position six-way valve (V3); the other port in the first two-position six-way valve (V3) is connected to an external purge gas tank (4); The enrichment section includes a collecting pipe (32) and a temperature regulating system, wherein the temperature regulating system includes a heat preservation barrel (31), a controller (36), a heater (311) and an aeration device; the heat preservation barrel (31) includes an inner cavity (34) and an outer cavity (33) connected at the bottom, wherein the inner cavity (34) and the outer cavity (33) contain a cooling medium; the collecting pipe (32) is U-shaped and is located in the inner cavity (34); the bottom of the collecting pipe (32) is located above the liquid level of the cooling medium; a temperature sensor (35) is provided on the outer wall of the collecting pipe, and the interior is filled with a collecting material; the temperature sensor (35) is in communication with the controller (36); the aeration device includes an aeration tank (37) with a solenoid valve (38); the solenoid valve (38) The collecting tube (32) is connected to an air filling tube (310) with a three-way electromagnetic valve (39), the end of the air filling tube (310) extends into the outer cavity (33), and the top of the outer cavity (33) is sealed; the electromagnetic valve (38) and the three-way electromagnetic valve (39) are both communicatively connected to the controller (36); the two ends of the collecting tube (32) are provided with metal two-way valves (312) with adapters, the metal two-way valves (312) are connected to the heater (311), and the adapter on the metal two-way valve (312) at one end of the collecting tube (32) is connected to a port of the first two-way six-way valve (V3) through a pipeline provided with a second two-position six-way valve (V4) and a drying tube (6), and a port of the second two-position six-way valve (V4) is connected to the chromatographic device (5).

2. The device for enriching and treating fluoride and sulfide in water according to claim 1, characterized in that: The injection portion (1) further comprises an upright fixed panel (13), and the injection syringe (11) is vertically fixed on the fixed panel (13) with the outlet facing downward; a quantitative system is provided above the injection syringe (11), and the quantitative system comprises a scale (14) and a fixed buckle (15), the fixed buckle (15) is fixed on the fixed panel (13), the scale (14) is movably inserted into the fixed buckle (15), and the lower end of the scale (14) is connected to the push rod of the injection syringe (11).

3. The device for enriching and treating fluoride and sulfide in water according to claim 1, characterized in that: The purge tube is made of glass, and the vaporization chamber (21) and the capillary tube (22) are integrally formed.

4. The device for enriching and treating fluoride and sulfide in water according to claim 3, characterized in that: The vaporization chamber (21) has a length of 10 cm, an outer diameter of 5 cm, and a wall thickness of 1.5 mm; the capillary tube (22) has a length of 50-60 cm, an outer diameter of 1 cm, and a wall thickness of 1.5 mm.

5. The device for enriching and treating fluoride and sulfide in water according to claim 4, characterized in that: A sand core (25) is provided inside the vaporization chamber (21), and the sand core (25) is located below the liquid inlet (24); the sand pore diameter of the sand core (25) is 10-15 μm.

6. The device for enriching and treating fluoride and sulfide in water according to claim 1, characterized in that: The collecting tube (32) is made of stainless steel, has a total length of 40-45 cm, an outer diameter of 3.175 mm, and an inner diameter of 2.5 mm.

7. The device for enriching and treating fluoride and sulfide in water according to claim 6, characterized in that: There is a 10 cm gap between the collecting material filled in the collecting tube (32) and both ends of the collecting tube (32).

8. The device for enriching and treating fluoride and sulfide in water according to claim 7, characterized in that: The capture material is Hayes Sep. D filler, and its particle size is 80-100 mesh.

9. The device for enriching and treating fluoride and sulfide in water according to claim 1, characterized in that: The adapter comprises a stainless steel tube (313) and a plastic joint (314); the two ends of the stainless steel tube (313) are respectively connected to a metal two-way valve (312) and a plastic joint (314); and the pipeline provided with a second two-position six-way valve (V4) and a drying tube (6) is connected to the plastic joint (314).

10. The device for enriching and treating fluoride and sulfide in water according to claim 1, characterized in that: The temperature adjustment system further includes a cooling device (315) for cooling the cooling medium.

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