Chromium element volatilization amount measuring device

Abstract

The utility model discloses a device for measuring the volatilization amount of chromium element, the device comprises an oxygen supply system, a heating system, a condensing system, a solution volume adjusting system and a data recording and processing system, the oxygen supply system comprises a humidifier, one end of a quartz tube is connected with the humidifier, the humidifier is used for adjusting the humidity in air flow before the air flow flows to a sample, and the humidity in the sample is adjusted by the condensing system. The heating system comprises a quartz tube and a resistance furnace, a sample is placed in the quartz tube, the quartz tube is inserted into the resistance furnace, a temperature controller is attached to the resistance furnace, the condensing system comprises a condenser and a first thermoelectric thermostat, the other end of the quartz tube is connected with the condenser, and the first thermoelectric thermostat is arranged at the lower end of the condenser. When the device is used, after wet oxygen flow is controlled at 7 DEG C through the first thermoelectric thermostat and passes through the quartz tube, water is condensed into condensate, and the condensate is collected in the condenser connected with the bottom of the quartz tube, so that uniform collection after chromium volatilization is realized, and the quality of chromium volatile matters is measured.

Description

Technical Field

[0001] This utility model relates to the field of metal element measurement technology, and in particular to a device for measuring the volatilization of chromium. Background Technology

[0002] Solid oxide fuel cells (SOFCs) are electrochemical devices that convert chemical energy into electrical energy through electrochemical reactions. The operating temperature of SOFCs can now be reduced to an intermediate level of around 800°C. Therefore, metallic materials, particularly ferritic stainless steel, are being explored as connector materials due to their high electrical conductivity, thermal expansion matching with other battery components, and relatively low cost.

[0003] However, commonly used metal interconnect materials suffer from chromium volatilization when operating in prolonged high-temperature environments, which can cause cathode poisoning in SOFCs and lead to a decline in battery performance. The main chromium volatilization products in the interconnect are chromium trioxide (CrO3) and hydroxide (CrO2(OH)2). These volatile substances in SOFCs can poison the cathode material, causing problems such as reduced long-term stack stability and shortened battery life. Therefore, a device for measuring chromium volatilization is urgently needed in the design and development of batteries to quantify the degree of chromium volatilization and provide a testing method for the preparation and optimization of solid oxide batteries. Utility Model Content

[0004] One of the objectives of this utility model is achieved through the following technical solution:

[0005] A device for measuring the volatilization of chromium includes an oxygen supply system, a heating system, a data processing system, a condensation system, and a solution volume regulation system. The heating system includes a quartz tube and a furnace. The sample is placed inside the quartz tube, which is inserted into the furnace, which is equipped with a temperature controller. The oxygen supply system includes a humidifier, with one end of the quartz tube connected to the humidifier. The humidifier is used to regulate the humidity in the airflow before it flows to the sample. The condensation system includes a condenser and a first thermoelectric thermostat, with the other end of the quartz tube connected to the condenser. The first thermoelectric thermostat is located at the lower end of the condenser.

[0006] As a further embodiment of this utility model, the data processing system includes a data logger and a computer processor electrically connected to one side of the furnace, with the data logger and the computer processor being electrically connected.

[0007] As a further embodiment of this utility model, a second thermoelectric thermostat is provided at the lower end of the humidifier, and the oxygen supply system also includes an oxygen tank located on the left side of the humidifier.

[0008] As a further embodiment of this invention, a pressure gauge and a flow meter are connected sequentially between the oxygen tank and the humidifier via a pipeline.

[0009] As a further embodiment of this utility model, the solution volume adjustment system includes a mixing tank, and a partition is provided near the bottom of the inner cavity of the mixing tank. A measuring cylinder is provided on the top of the partition, and a sealing cap is provided on the top of the measuring cylinder. A lifting plate is fixedly connected to the top of the sealing cap. An electric rod is provided on the top of the inner cavity of the mixing tank, and the power end of the electric rod is fixedly connected to the top of the lifting plate. A bearing is provided on the lifting plate, and a first square-hole tube is rotatably connected to the inner cavity of the bearing. A plurality of stirring blades located in the inner cavity of the measuring cylinder are fixedly connected to the outer wall of the first square-hole tube, and a first square rod adapted thereto is slidably inserted into the top of the inner cavity of the first square-hole tube. A drive motor is provided on the top of the inner cavity of the mixing tank, and the top of the first square rod is fixedly connected to the power output end of the drive motor.

[0010] As a further embodiment of this utility model, a liquid storage cylinder is fixedly connected to the top right side of the mixing tank, and a first observation window is provided on the front side of the liquid storage cylinder. Graduation lines are provided on the outer wall of the liquid storage cylinder. A piston is slidably connected to the inner cavity of the liquid storage cylinder. A push rod slidably passes through the top of the liquid storage cylinder, and the bottom end of the push rod is fixedly connected to the piston. A push plate is fixedly connected to the top end of the push rod. An inlet pipe is inserted and fixedly connected to the left side of the liquid storage cylinder, and a pipe valve is provided on the inlet pipe. A drain pipe is inserted and fixedly connected to the bottom of the liquid storage cylinder, and the bottom end of the drain pipe passes through the top of the mixing tank and extends into the inner cavity of the mixing tank. A connecting pipe is inserted into the bottom end of the inner cavity of the drain pipe, and the other end of the connecting pipe passes through a sealing cap and communicates with the inner cavity of the measuring cylinder. A first sealing ring is provided at the upper end of the connecting pipe, and the first sealing ring is fitted against the inner wall of the drain pipe. A solenoid valve is provided on the connecting pipe.

[0011] As a further embodiment of this utility model, a through hole is provided in the middle of the partition plate, and a second square-hole tube is inserted into the inner cavity of the through hole. The top end of the second square-hole tube is fixedly connected to the center of the bottom of the measuring cylinder, and a matching second square rod is slidably inserted into the bottom of the inner cavity of the second square-hole tube. The bottom end of the second square rod is rotatably connected to the bottom of the inner cavity of the mixing box. A driven gear is sleeved and fixed on the outer wall of the second square rod. A transmission gear meshes with the left side of the driven gear, and a fixed plate passes through the center of the transmission gear. A drive shaft is provided, the bottom end of which is rotatably connected to the bottom of the inner cavity of the mixing box. A through hole is provided on the partition plate, and the top end of the drive shaft passes through the through hole and is rotatably connected to the top of the inner cavity of the mixing box. A worm gear is sleeved and fixed on the outer wall of the drive shaft near the top end, and a worm is meshed on the rear side of the worm gear. The left end of the worm is rotatably connected to the left side wall of the inner cavity of the mixing box, and a driven bevel gear is fixedly connected to the right end of the worm. A transmission bevel gear that meshes with the driven bevel gear is sleeved and fixed on the outer wall of the first square rod.

[0012] As a further embodiment of this utility model, the front hinge of the mixing box is connected to a sealing door, and a handle is provided on the front side of the sealing door. A second observation window is provided on the sealing door near the middle position.

[0013] As a further embodiment of this utility model, the outer wall of the measuring cylinder is fitted with a second sealing ring, and the second sealing ring is fixedly connected to the inner wall of the sealing cap.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. When this utility model is used, the temperature is controlled at 7°C by the first thermoelectric thermostat. After the humid oxygen flows through the quartz tube, the water condenses into condensate and is collected in the condenser connected to the bottom of the quartz tube. This realizes the unified collection of chromium volatilization and facilitates the measurement of the chromium volatilization content.

[0016] 2. When using this utility model, the sample is suspended in a quartz tube in a vertical electric furnace at 800℃. Before flowing to the sample, a humidifier is used to adjust the humidity in the airflow. The humidity is mainly adjusted by using oxygen containing 5% H2O, which can ensure that the quality of the solution collected from chromium volatilization remains stable and ensure the accuracy of the test.

[0017] 3. In use, this invention involves cleaning the quartz tube and condenser with 0.1M hydrochloric acid, mixing the cleaning solution and the condensate, and then pouring the mixture into a graduated cylinder. By pushing the pusher plate, deionized water from the storage cylinder is pushed into the graduated cylinder, thereby quantitatively adjusting the sample volume. The stirring blade and graduated cylinder are rotated by a drive motor, which accelerates the mixing efficiency of the solution. After the volume adjustment is completed, the chromium content in the sample is measured using an inductively coupled plasma mass spectrometer (ICP-MS), effectively improving the measurement efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the measurement process of a device for measuring the volatilization of chromium.

[0019] Figure 2 A schematic diagram of a measurement system for measuring the volatilization of chromium.

[0020] Figure 3 This is a schematic diagram of the adjustment system structure in this embodiment;

[0021] Figure 4 This is a cross-sectional view of the mixing box in this embodiment;

[0022] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0023] Figure 6 for Figure 4 Enlarged view of the structure at point B.

[0024] In the diagram: 1. Quartz tube; 2. Humidifier; 3. Condenser; 4. First thermoelectric thermostat; 5. Furnace; 51. Temperature controller; 6. Computer processor; 7. Oxygen tank; 71. Pressure gauge; 72. Flow meter; 8. Data logger; 9. Sample; 10. Mixing chamber; 11. Sealed door; 12. Baffle; 13. Measuring cylinder; 14. Sealed cover; 15. Lifting plate; 16. Electric rod; 17. First square-hole round tube; 18. Stirring blade; 19. Drive motor; 20. First square rod; 21. Second sealing ring; 22. 23. Storage cylinder; 24. Piston; 25. Push rod; 26. Push plate; 27. Inlet pipe; 28. Pipe valve; 29. ​​Drain pipe; 30. Connecting pipe; 31. Solenoid valve; 32. First sealing ring; 33. Through hole; 34. Second square hole round tube; 35. Second square rod; 36. Driven gear; 37. Transmission gear; 38. Transmission shaft; 39. Worm gear; 40. Driven bevel gear; 41. Transmission bevel gear; 42. First observation window; 43. Scale line; 44. Second observation window; 45. Second thermoelectric thermostat. Detailed Implementation

[0025] This utility model provides the following technical solution:

[0026] Example 1, please refer to Figure 1-2 :

[0027] A device for measuring the volatilization of metallic chromium includes an oxygen supply system, a heating system, a data processing system, a condensation system, and a solution volume adjustment system. The heating system comprises a quartz tube 1 and a furnace 5. A sample 9 is placed inside the quartz tube 1, which is inserted into the furnace 5. The furnace 5 is equipped with a temperature controller 51. The furnace 5 heats the quartz tube 1 and the sample inside it while maintaining the internal gas velocity within the actual velocity range of 1-10 cm / s⁻¹ in a heat pipe furnace. The oxygen supply system includes a humidifier 2. One end of the quartz tube 1 is connected to the humidifier 2. The sample 9 is suspended inside the quartz tube 1 in a vertical electric furnace at 800°C. Before flowing to the sample 9, the humidifier 2 is used to adjust the humidity in the airflow, mainly using oxygen containing 5% H2O. The condensation system includes a condenser 3 and a first thermoelectric thermostat 4. The other end of the quartz tube 1 is connected to the condenser 3. The first thermoelectric thermostat 4 is installed at the lower end of the condenser 3. The thermoelectric thermostat 4 is used to control the temperature of the condenser 3. The thermostat keeps it at 7°C to condense all volatile chromium substances.

[0028] The data processing system includes a data logger 8 and a computer processor 6 electrically connected to one side of the furnace 5. The data logger 8 and the computer processor 6 are used to record and calculate various data in the chromium volatilization test.

[0029] A second thermoelectric thermostat 45 is installed at the lower end of the humidifier 2. The second thermoelectric thermostat 45 can ensure that the temperature of the humidifier 2 remains constant, so as to control the test data and ensure that the humidifier 2 can properly regulate the humidity in the airflow. The oxygen supply system also includes an oxygen tank 7 installed on the left side of the humidifier 2. A pressure gauge 71 and a flow meter 72 are connected to the oxygen tank 7 and the humidifier 2 in sequence through a pipeline. The oxygen tank 7 is mainly used to provide the gas required to regulate the humidity of the airflow to generate water vapor. The pressure gauge 71 and the flow meter 72 are used to monitor the output intensity and output of oxygen to prevent excessive oxygen output.

[0030] Working principle: During the chromium volatilization test, sample 9 is polished with 1200-grit sandpaper and cleaned with ethanol. The evaporation rate of chromium is measured by this device, in which O2 humidified with 5% water vapor passes through the quartz tube 1 on which sample 9 is placed. The temperature inside the tube is controlled by furnace 5. During the experiment, the duration is 96 hours. A condenser 3 is installed at the furnace outlet, and the temperature is controlled at 7°C by the first thermoelectric thermostat 4. After the humidified oxygen flows through the quartz tube 1, the water condenses into condensate, which is collected in the condenser 3 connected to the bottom of the quartz tube 1. After each experiment, in order to collect sample 9, the quartz tube 1 and the condenser 3 are cleaned with 0.1M hydrochloric acid.

[0031] Example 2, please refer to Figure 3-6 :

[0032] The solution volume adjustment system includes a mixing tank 10, with a partition 12 near the bottom of the inner cavity of the mixing tank 10. A measuring cylinder 13 is located on the top of the partition 12, and a sealing cap 14 is provided on the top of the measuring cylinder 13. The measuring cylinder 13 has a graduated strip, which allows for precise control of the volume of solution injected into the inner cavity of the measuring cylinder 13. A lifting plate 15 is fixedly connected to the top of the sealing cap 14. An electric rod 16 is located on the top of the inner cavity of the mixing tank 10, and the power end of the electric rod 16 is fixedly connected to the top of the lifting plate 15. A bearing is provided on the lifting plate 15, and a first square-hole circular tube 17 is rotatably connected to the inner cavity of the bearing. Several stirring rods located in the inner cavity of the measuring cylinder 13 are fixedly connected to the outer wall of the first square-hole circular tube 17. The first square rod 20 is slidably inserted into the top of the inner cavity of the first square hole tube 17. The top of the inner cavity of the mixing box 10 is provided with a drive motor 19, and the top of the first square rod 20 is fixedly connected to the power output end of the drive motor 19. After the cleaning liquid and condensate obtained after cleaning with 0.1M hydrochloric acid are poured into the inner cavity of the measuring cylinder 13, the lifting plate 15 can be pushed vertically downward by the electric rod 16, and the sealing cover 14 is placed on the top of the measuring cylinder 13. Then, the drive motor 19 is started to drive the first square rod 20 to rotate. The rotation of the first square rod 20 drives the first square hole tube 17 to rotate, and drives several stirring blades 18 to rotate, so that the cleaning liquid and condensate can be quickly mixed.

[0033] A liquid storage cylinder 22 is fixedly connected to the top right side of the mixing tank 10, and a first observation window 42 is provided on the front side of the liquid storage cylinder 22. A scale line 43 is provided on the outer wall of the liquid storage cylinder 22. Through the first observation window 42 and the scale line 43, the volume of deionized water inside the liquid storage cylinder 22 can be monitored. A piston 23 is slidably connected to the inner cavity of the liquid storage cylinder 22. A push rod 24 slides through the top of the liquid storage cylinder 22, and the bottom end of the push rod 24 is fixedly connected to the piston 23. A push plate 25 is fixedly connected to the top end of the push rod 24. An inlet pipe 26 is inserted and fixedly connected to the left side of the liquid storage cylinder 22, and a pipe valve 27 is provided on the inlet pipe 26. A drain pipe 28 is inserted and fixedly connected to the bottom of the liquid storage cylinder 22, and the bottom end of the drain pipe 28... The drain pipe 28 extends through the top of the mixing chamber 10 and into its inner cavity. A connecting pipe 29 is inserted into the bottom of the inner cavity of the drain pipe 28, and the other end of the connecting pipe 29 passes through the sealing cap 14 and is connected to the inner cavity of the measuring cylinder 13. A first sealing ring 31 is provided at the upper end of the connecting pipe 29, and the first sealing ring 31 is fitted against the inner wall of the drain pipe 28. A solenoid valve 30 is provided on the connecting pipe 29. By pushing the push plate 25 and driving the push rod 24 to move vertically downward, the piston 23 can be driven to move downward. The downward movement of the piston 23 can squeeze out the deionized water inside and outside the storage cylinder 22 and inject the deionized water into the measuring cylinder 13 through the drain pipe 28 and the connecting pipe 29, thereby allowing quantitative adjustment of the volume of the sample 9 solution.

[0034] A through hole 32 is provided in the middle of the partition plate 12, and a second square-hole tube 33 is inserted into the inner cavity of the through hole 32. The top end of the second square-hole tube 33 is fixedly connected to the bottom center of the measuring cylinder 13, and a matching second square rod 34 is slidably inserted into the bottom end of the inner cavity of the second square-hole tube 33. The bottom end of the second square rod 34 is rotatably connected to the bottom of the inner cavity of the mixing box 10. A driven gear 35 is sleeved and fixed on the outer wall of the second square rod 34. A transmission gear 36 meshes with the left side of the driven gear 35, and a transmission shaft 37 is fixedly fixed through the center of the transmission gear 36. The bottom end of the transmission shaft 37 is rotatably connected to the bottom of the inner cavity of the mixing box 10. A through hole is provided in the partition plate 12, and the top end of the transmission shaft 37 passes through the inner cavity of the through hole and is rotatably connected to the top of the inner cavity of the mixing box 10. A worm gear 3 is sleeved and fixed near the top end of the outer wall of the transmission shaft 37. 8. The worm gear 38 is meshed with a worm 39 on its rear side. The left end of the worm 39 is rotatably connected to the left side wall of the inner cavity of the mixing box 10, and the right end of the worm 39 is fixedly connected to a driven bevel gear 40. A transmission bevel gear 41 that meshes with the driven bevel gear 40 is sleeved and fixed on the outer wall of the first square rod 20. When the drive motor 19 drives the first square rod 20 to rotate, the worm 39 can be driven to rotate through the meshing of the transmission bevel gear 41 and the driven bevel gear 40. The rotation of the worm 39 drives the worm gear 38 to rotate, and the rotation of the worm gear 38 drives the transmission shaft 37 to rotate. Through the meshing of the transmission gear 36 and the driven gear 35, the second square rod 34 can be driven to rotate in the opposite direction. Through the sleeve transmission of the second square rod 34 and the second square hole tube 33, the measuring cylinder 13 can be driven to rotate in the opposite direction to the stirring blade 18, thereby effectively accelerating the mixing efficiency of the solution in the inner cavity of the measuring cylinder 13.

[0035] The front hinge of the mixing box 10 is connected to a sealing door 11, and a handle is provided on the front side of the sealing door 11. A second observation window 44 is provided on the sealing door 11 near the middle position to improve the sealing performance of the mixing box 10.

[0036] The outer wall of the measuring cylinder 13 is fitted with a second sealing ring 21, and the second sealing ring 21 is fixedly connected to the inner wall of the sealing cover 14, which improves the tightness of the connection between the measuring cylinder 13 and the sealing cover 14 and avoids easy leakage.

[0037] Working principle: The cleaning solution and condensate obtained after cleaning the quartz tube 1 and condenser 3 are injected into the inner cavity of the measuring cylinder 13. The electric lever 16 is activated to push the lifting plate 15 vertically downward and cover the top of the measuring cylinder 13 with the sealing cap 14. The drive motor 19 is activated to drive the first square rod 20 to rotate. The rotation of the first square rod 20 drives the first square hole tube 17 to rotate, thereby driving several stirring blades 18 to rotate and mix the cleaning solution and condensate. When the first square rod 20 rotates, the meshing of the transmission bevel gear 41 and the driven bevel gear 40 drives the worm gear 39 to rotate. The rotation of the worm gear 39 drives the worm wheel 38 to rotate. The rotation of the worm wheel 38 drives the transmission shaft 37 to rotate. The transmission gear 36 rotates, which in turn drives the driven gear 35 to rotate in the opposite direction. Through the connection between the second square rod 34 and the second square hole tube 33, the measuring cylinder 13 can rotate in the opposite direction, thereby further accelerating the mixing efficiency of the solution. After the mixture is uniform, the deionized water pre-injected into the inner cavity of the storage cylinder 22 can be squeezed out by pressing the push plate 25 during the downward movement of the piston 23. The water is then injected into the inner cavity of the measuring cylinder 13 through the drain pipe 28 and the connecting pipe 29, thereby allowing quantitative adjustment of the volume of the sample 9 solution in the measuring cylinder 13. After the volume of the sample 9 solution is adjusted, the chromium content in the sample 9 can be measured using an inductively coupled plasma mass spectrometer (ICP-MS).

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for measuring the amount of chromium element volatilization, characterized in that it comprises: The device comprises an oxygen supply system, a heating system, a data processing system, a condensing system and a solution volume adjusting system, the heating system comprises a quartz tube (1) and a furnace (5), the inside of the quartz tube (1) is placed with a sample (9), the quartz tube (1) is inserted into the furnace (5), the furnace (5) is attached with a temperature controller (51), the oxygen supply system comprises a humidifier (2), one end of the quartz tube (1) is connected with the humidifier (2), the humidity in the airflow is adjusted by using the humidifier (2) before flowing to the sample (9), the condensing system comprises a condenser (3) and a first thermoelectric thermostat (4), the other end of the quartz tube (1) is connected with the condenser (3), the lower end of the condenser (3) is provided with the first thermoelectric thermostat (4).

2. The apparatus for measuring the amount of chromium element volatilization according to claim 1, wherein The data processing system comprises a data recorder (8) and a computer processor (6) which are electrically connected on one side of the furnace (5), and the data recorder (8) is electrically connected with the computer processor (6).

3. The apparatus for measuring the amount of chromium element volatilization according to claim 1, wherein The lower end of the humidifier (2) is provided with a second thermoelectric thermostat (45), and the oxygen supply system further comprises an oxygen tank (7) which is arranged on the left side of the humidifier (2).

4. The apparatus for measuring the amount of chromium element volatilization according to claim 3, wherein The oxygen tank (7) and the humidifier (2) are sequentially connected with a pressure gauge (71) and a flowmeter (72) through pipelines.

5. The apparatus for measuring the amount of chromium element volatilization according to claim 1, wherein The solution volume adjusting system comprises a mixing box (10), and a partition plate (12) is arranged at the inner cavity of the mixing box (10) close to the bottom, a measuring cylinder (13) is arranged on the top of the partition plate (12), a sealing cover (14) is arranged on the top of the measuring cylinder (13), a lifting plate (15) is fixedly connected to the top of the sealing cover (14), an electric rod (16) is arranged at the top of the inner cavity of the mixing box (10), and the power end of the electric rod (16) is fixedly connected to the top of the lifting plate (15), a bearing is arranged on the lifting plate (15), a first square hole round pipe (17) is rotatably connected to the inner cavity of the bearing, a plurality of stirring blades (18) are fixedly connected to the outer wall of the first square hole round pipe (17) and arranged in the inner cavity of the measuring cylinder (13), a first square rod (20) is slidably inserted into the inner cavity of the first square hole round pipe (17), a driving motor (19) is arranged at the top of the inner cavity of the mixing box (10), and the top end of the first square rod (20) is fixedly connected to the power output end of the driving motor (19).

6. The apparatus for measuring the amount of chromium element volatilization according to claim 5, wherein The top right side of the mixing box (10) is fixedly connected with a liquid storage cylinder (22), a first observation window (42) is arranged on the front side of the liquid storage cylinder (22), scale lines (43) are arranged on the outer wall of the liquid storage cylinder (22), a piston (23) is slidably connected in the inner cavity of the liquid storage cylinder (22), a push rod (24) penetrates the top of the liquid storage cylinder (22) in a sliding manner, the bottom end of the push rod (24) is fixedly connected with the piston (23), the top end of the push rod (24) is fixedly connected with a push plate (25), a liquid inlet pipe (26) is fixedly inserted on the left side of the liquid storage cylinder (22), a pipe valve (27) is arranged on the liquid inlet pipe (26), a liquid outlet pipe (28) is fixedly inserted on the bottom of the liquid storage cylinder (22), the bottom end of the liquid outlet pipe (28) penetrates the top of the mixing box (10) and extends into the inner cavity of the mixing box (10), a communication pipe (29) is inserted into the inner cavity of the liquid outlet pipe (28), one end of the communication pipe (29) penetrates the sealing cover (14) and communicates with the inner cavity of the measuring cylinder (13), a first sealing ring (31) is arranged on the upper end of the communication pipe (29), and the first sealing ring (31) is arranged in close contact with the inner wall of the liquid outlet pipe (28), and an electromagnetic valve (30) is arranged on the communication pipe (29).

7. The apparatus for measuring the amount of chromium element volatilization according to claim 5, wherein A through hole (32) is formed in the middle of the partition plate (12), and a second square hole round pipe (33) is inserted into the inner cavity of the through hole (32), the top end of the second square hole round pipe (33) is fixedly connected with the bottom center of the measuring cylinder (13), a second square rod (34) is slidably inserted into the inner cavity of the second square hole round pipe (33), the bottom end of the second square rod (34) is rotatably connected with the inner cavity bottom of the mixing box (10), a driven gear (35) is fixedly sleeved on the outer wall of the second square rod (34), a transmission gear (36) is engaged on the left side of the driven gear (35), a transmission shaft (37) penetrates and is fixedly arranged on the center of the transmission gear (36), the bottom end of the transmission shaft (37) is rotatably connected with the inner cavity bottom of the mixing box (10), a through hole is formed in the partition plate (12), the top end of the transmission shaft (37) penetrates the inner cavity of the through hole and is rotatably connected with the inner cavity top of the mixing box (10), a worm wheel (38) is fixedly sleeved on the outer wall of the transmission shaft (37) close to the top end, a worm (39) is engaged on the rear side of the worm wheel (38), the left end of the worm (39) is rotatably connected with the inner cavity left side wall of the mixing box (10), the right end of the worm (39) is fixedly connected with a driven bevel gear (40), a transmission bevel gear (41) engaged with the driven bevel gear (40) is fixedly sleeved on the outer wall of the first square rod (20).

8. The apparatus for measuring the amount of chromium element volatilization according to claim 5, wherein A sealing door (11) is hingedly connected to the front side of the mixing box (10), a handle is arranged on the front side of the sealing door (11), a second observation window (44) is arranged on the sealing door (11) close to the middle position.

9. The apparatus for measuring the amount of chromium element volatilization according to claim 5, wherein The outer wall of the measuring cylinder (13) is sleeved with a second sealing ring (21), and the second sealing ring (21) is fixedly connected with the inner wall of the sealing cover (14).

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