Device for reversely preparing sulfuric acid solution in laboratory

Abstract

The utility model relates to the technical field of sulfuric acid solution preparation, in particular to a device for reversely preparing a sulfuric acid solution in a laboratory, which comprises a transparent mixed reaction kettle and an acid mist absorption tank, a reagent water storage assembly is fixedly connected to the other side, opposite to the concentrated sulfuric acid liquid storage assembly, of the upper end of the transparent mixed reaction kettle in a penetrating manner, and a stirring mechanism is mounted in the middle of the upper end of the transparent mixed reaction kettle in a penetrating manner. According to the device for reversely preparing the sulfuric acid solution in the laboratory, independent storage and automatic conveying of concentrated sulfuric acid and reagent water are achieved through the concentrated sulfuric acid storage assembly and the reagent water storage assembly, and an operator only needs to inject the concentrated sulfuric acid into the concentrated sulfuric acid storage tank in the preparation stage; reagent water is injected into the water storage tank of the reagent water storage assembly, and personnel do not need to directly contact concentrated sulfuric acid in the operation process, so that the occurrence probability of acid burn accidents is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sulfuric acid solution preparation technology, and in particular to a laboratory reverse preparation apparatus for sulfuric acid solution. Background Technology

[0002] Concentrated sulfuric acid is a commonly used reagent in laboratories of various environmental testing agencies, chemical plants, petroleum plants, and sewage treatment plants. In daily work, it is often necessary to prepare sulfuric acid solutions of various proportions (volume) for analysis and testing of samples.

[0003] In the laboratory, the preparation of sulfuric acid solutions is a common yet challenging operation due to the highly corrosive nature of concentrated sulfuric acid. Workers are prone to spilling concentrated sulfuric acid due to hand tremors or operational errors. Furthermore, uneven stirring or liquid splashing during stirring with a glass rod can easily lead to safety accidents. In addition, the dilution of concentrated sulfuric acid releases a large amount of heat, especially when preparing large quantities of high-concentration sulfuric acid solutions, which can easily cause localized boiling. This not only increases the risk of splashing and injury but also requires the diluted solution to cool to room temperature for an extended period before use. If an experiment urgently needs sulfuric acid solution, this can severely impact work progress and reduce efficiency. Therefore, we have developed a reverse-processing apparatus for preparing sulfuric acid solutions in the laboratory. Utility Model Content

[0004] The main objective of this invention is to provide a laboratory reverse preparation apparatus for sulfuric acid solution, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A laboratory reverse-flow sulfuric acid solution preparation apparatus includes a transparent mixing reactor and an acid mist absorption tank. A concentrated sulfuric acid storage component is fixedly connected to one side of the upper end of the transparent mixing reactor. A reagent water storage component is fixedly connected to the other side of the upper end of the transparent mixing reactor opposite to the concentrated sulfuric acid storage component. The reagent water storage component and the concentrated sulfuric acid storage component have the same structure and are arranged in a mirror image. A stirring mechanism is installed at the center of the upper end of the transparent mixing reactor. An acid mist outlet pipe is fixedly connected to the rear of the upper end of the transparent mixing reactor, and the upper end of the acid mist outlet pipe is fixedly connected to the lower end of the acid mist absorption tank. An acid mist emission pipe is fixedly connected to the middle of the upper end of the acid mist absorption tank. A liquid outlet pipe is fixedly connected to the right side of the lower end of the transparent mixing reactor. Switch valves are movably installed on the outer surfaces of both the liquid outlet pipe and the acid mist outlet pipe. A set of capacity scale bars is provided on the outer surface of the transparent mixing reactor.

[0007] The stirring mechanism includes a servo motor. An upper flange is fixedly installed at the output end of the servo motor. A rotating rod is fixedly connected to the lower end of the upper flange. A lower flange is fixedly connected to the lower end of the rotating rod, and the lower end of the lower flange is movably connected to the lower inner wall of the transparent mixing reactor through a rotating shaft. Several arc-shaped stirring blades are fixedly connected to the outer surface of the rotating rod. Several transverse stirring rods are fixedly connected to the outer surface of each of the arc-shaped stirring blades. The lower end of the servo motor is fixedly connected to the upper end of the transparent mixing reactor, and the output end of the servo motor passes through the upper end of the transparent mixing reactor and extends into the interior of the transparent mixing reactor.

[0008] Preferably, a plurality of the arc-shaped stirring blades are arranged in a circular array around the center of the rotating rod, and a plurality of the transverse stirring rods are arranged in pairs at equal distances and each has a gap with the inner wall of the transparent mixing reactor.

[0009] By adopting the above technical solution, when the rotating rod rotates, the horizontal stirring rod can move the liquid at different levels laterally, which, together with the longitudinal stirring action of the arc-shaped stirring blade, greatly improves the mixing efficiency of the liquid.

[0010] Preferably, the acid mist absorption tank includes a tank body and a first tank cover, a first sealing ring is fixedly connected to the lower end of the first tank cover, a filter assembly is fixedly connected to the middle of the inner wall of the tank body, and the lower end of the tank body is inserted and fixedly connected to the upper end of the acid mist outlet pipe.

[0011] By adopting the above technical solution, the lower end of the tank is inserted and fixedly connected to the upper end of the acid mist outlet pipe, ensuring that the acid mist can smoothly enter the acid mist absorption tank from the transparent mixing reactor.

[0012] Preferably, the first sealing ring is movably fitted inside the tank, and the upper end of the first tank cover is inserted and fixedly connected to the lower end of the acid mist emission pipe.

[0013] By adopting the above technical solution: when acid mist enters the tank through the acid mist outlet pipe, the first sealing ring tightly fits the inner wall of the tank, forming an effective sealing barrier to prevent acid mist from leaking out from the connection between the tank cover and the tank body.

[0014] Preferably, the filter assembly includes a first fixing frame, a second fixing frame fixedly connected to the upper end of the first fixing frame, a third fixing frame fixedly connected to the upper end of the second fixing frame, and a fourth fixing frame fixedly connected to the upper end of the third fixing frame. The inner wall surface of the first fixing frame is embedded with a metal wire mesh, the inner wall surface of the second fixing frame is fixedly connected with a sodium hydroxide particle layer, the inner wall surface of the third fixing frame is fixedly connected with a polytetrafluoroethylene nanofiber membrane, and the inner wall surface of the fourth fixing frame is fixedly connected with an activated carbon adsorption layer. The outer surfaces of the first fixing frame, the second fixing frame, the third fixing frame, and the fourth fixing frame are all fixedly connected to the inner wall surface of the tank.

[0015] By adopting the above technical solution, the filter assembly consists of four interlocking fixed frames: a first fixed frame, a second fixed frame, a third fixed frame, and a fourth fixed frame. Each fixed frame contains a metal wire mesh, a sodium hydroxide particle layer, a polytetrafluoroethylene (PTFE) nanofiber membrane, and an activated carbon adsorption layer. This constructs a multi-layered filtration system that intercepts large particles, neutralizes them chemically, filters fine impurities, and adsorbs odors. When acid mist passes through the filter assembly, the metal wire mesh first intercepts larger particles, preventing them from clogging the subsequent fine filtration layer. Then, the acidic gas undergoes a neutralization reaction with the sodium hydroxide particle layer, reducing the acidity of the mist. Subsequently, the PTFE nanofiber membrane filters out tiny droplets and residual acid molecules. Finally, the activated carbon adsorption layer adsorbs odors and small amounts of volatile organic pollutants. This multi-layered filtration works synergistically to greatly improve the efficiency and quality of acid mist purification, ensuring that the emitted gas meets strict environmental standards and protecting the laboratory environment and personnel health.

[0016] Preferably, the concentrated sulfuric acid storage assembly includes a concentrated sulfuric acid storage tank, a water pump, and a second tank cover. A second sealing ring is fixedly connected to the lower end of the second tank cover, and a level gauge is fixedly installed through the middle of the upper end of the second tank cover. A connecting pipe is fixedly connected through the lower part of the outer surface of the concentrated sulfuric acid storage tank, and an electromagnetic valve is movably installed through the outer surface of the connecting pipe. A delivery pipe is fixedly installed through the end of the water pump near the concentrated sulfuric acid storage tank, and an inlet pipe is fixedly installed through the upper part of the outer surface of the water pump.

[0017] By adopting the above technical solution, a level gauge is fixedly installed in the middle of the upper part of the second tank cover, which can monitor the liquid level of concentrated sulfuric acid in the concentrated sulfuric acid storage tank in real time. During the preparation of sulfuric acid solution, the operator can control the remaining amount of concentrated sulfuric acid according to the display of the level gauge, and adjust the subsequent delivery volume according to the required concentration and volume of sulfuric acid solution.

[0018] Preferably, the second tank cover is movably fitted inside the concentrated sulfuric acid storage tank, the upper end of the infusion pipe is inserted and fixedly connected to the lower end of the connecting pipe, and the lower end of the inlet pipe, near the transparent mixing reactor, is inserted and fixedly connected to the upper end of the transparent mixing reactor.

[0019] By adopting the above technical solution: the concentrated sulfuric acid storage tank is equipped with a second tank cover and a second sealing ring fixedly connected at the lower end, a tight sealed storage environment is formed. The good sealing performance can effectively prevent concentrated sulfuric acid leakage, avoid pollution to the laboratory environment and avoid safety threats to personnel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In this utility model, the independent storage and automatic delivery of concentrated sulfuric acid and reagent water are achieved through the concentrated sulfuric acid storage component and the reagent water storage component. The operator only needs to inject the concentrated sulfuric acid into the concentrated sulfuric acid storage tank and the reagent water into the storage tank of the reagent water storage component during the preparation stage. The operation process does not require personnel to directly contact the concentrated sulfuric acid, which greatly reduces the probability of acid burn accidents. The amount of concentrated sulfuric acid and reagent water can be controlled by the volume scale bar, liquid level gauge, water pump and solenoid valve. During the preparation process, the operator can adjust the injection volume of the two liquids according to the required concentration of sulfuric acid solution and the indication of the volume scale bar and liquid level gauge, so as to prepare a sulfuric acid solution with a highly accurate concentration, which meets the experimental needs of various experiments with strict requirements for solution concentration accuracy.

[0022] 2. In this utility model, the acid mist absorption tank is equipped with a filter assembly including a metal wire mesh, a sodium hydroxide particle layer, a polytetrafluoroethylene nanofiber membrane and an activated carbon adsorption layer. During the solution preparation process, the acid mist generated enters the acid mist absorption tank through the acid mist outlet pipe. After being filtered and purified through multiple layers, it is discharged through the acid mist emission pipe. This effectively avoids the irritation of the respiratory tract and eyes of the experimental personnel by the acid mist, as well as the pollution of the laboratory environment, and further ensures the safety of the experimental operation environment.

[0023] In this invention, the servo motor in the stirring mechanism drives the rotating rod to rotate. The arc-shaped stirring blades arranged in a ring array and the horizontal stirring rods arranged at equal distances on the rotating rod can efficiently stir and mix concentrated sulfuric acid and reagent water in the transparent mixing reactor. At the same time, it helps to distribute heat evenly, avoids local overheating that could cause the solution to boil, speeds up the mixing and cooling of the solution, shortens the time required for the entire preparation process, and improves work efficiency. Attached Figure Description

[0024] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0025] Figure 1 This is a schematic diagram of the overall structure of a laboratory reverse preparation apparatus for sulfuric acid solution according to the present invention;

[0026] Figure 2This is a cross-sectional view of the structure of a laboratory reverse preparation device for sulfuric acid solution according to the present invention (in which the transparent mixing reaction vessel, acid mist absorption tank, concentrated sulfuric acid storage component and reagent water storage component are cut out).

[0027] Figure 3 This is a schematic diagram of the acid mist absorption tank of a laboratory reverse preparation apparatus for sulfuric acid solution according to the present invention (the tank body is cut out).

[0028] Figure 4 An exploded view of the filter assembly of a laboratory reverse-flow sulfuric acid solution preparation device according to this utility model;

[0029] Figure 5 This is a schematic diagram of the concentrated sulfuric acid storage component of a laboratory reverse sulfuric acid solution preparation device according to the present invention (the concentrated sulfuric acid storage tank is cut out).

[0030] Figure 6 This is a schematic diagram of the overall structure of the stirring mechanism of a laboratory reverse preparation device for sulfuric acid solution according to the present invention.

[0031] In the diagram: 1. Transparent mixing reactor; 2. Acid mist absorption tank; 3. Concentrated sulfuric acid storage assembly; 4. Reagent water storage assembly; 5. Stirring mechanism; 6. Acid mist outlet pipe; 7. Acid mist emission pipe; 8. Liquid outlet pipe; 9. Switch valve; 10. Capacity scale bar; 21. Tank body; 22. First tank cover; 23. First sealing ring; 24. Filter assembly; 241. First fixing frame; 242. Second fixing frame; 243. Third fixing frame; 244. Fourth fixing frame; 245. 1. Metal wire mesh; 246. Sodium hydroxide granular layer; 247. Polytetrafluoroethylene nanofiber membrane; 248. Activated carbon adsorption layer; 31. Concentrated sulfuric acid storage tank; 32. Water pump; 33. Second tank cover; 34. Second sealing ring; 35. Liquid level gauge; 36. Connecting pipe; 37. Solenoid valve; 38. Infusion pipe; 39. Inlet pipe; 51. Servo motor; 52. Upper flange; 53. Rotating rod; 54. Lower flange; 55. Arc-shaped stirring blade; 56. Horizontal stirring rod. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Please see Figure 1-6 This utility model provides a technical solution:

[0036] A laboratory reverse-flow sulfuric acid solution preparation apparatus includes a transparent mixing reactor 1 and an acid mist absorption tank 2. A concentrated sulfuric acid storage component 3 is fixedly connected to one side of the upper end of the transparent mixing reactor 1. A reagent water storage component 4 is fixedly connected to the other side of the upper end of the transparent mixing reactor 1 opposite to the concentrated sulfuric acid storage component 3. The reagent water storage component 4 and the concentrated sulfuric acid storage component 3 have the same structure and are mirror images of each other. A stirring mechanism 5 is installed at the center of the upper end of the transparent mixing reactor 1. An acid mist outlet pipe 6 is fixedly connected to the rear of the upper end of the transparent mixing reactor 1, and the upper end of the acid mist outlet pipe 6 is fixedly connected to the lower end of the acid mist absorption tank 2. An acid mist emission pipe 7 is fixedly connected to the middle of the upper end of the acid mist absorption tank 2. An outlet pipe 8 is fixedly connected to the right side of the lower end of the transparent mixing reactor 1. Switch valves 9 are movably installed on the outer surface of both the outlet pipe 8 and the outer surface of the acid mist outlet pipe 6. A set of capacity scale bars 10 is provided on the outer surface of the transparent mixing reactor 1.

[0037] In this embodiment, the stirring mechanism 5 includes a servo motor 51. An upper flange 52 is fixedly mounted on the output end of the servo motor 51. A rotating rod 53 is fixedly connected to the lower end of the upper flange 52. A lower flange 54 is fixedly connected to the lower end of the rotating rod 53, and the lower end of the lower flange 54 is movably connected to the lower inner wall of the transparent mixing reactor 1 via a rotating shaft. Several arc-shaped stirring blades 55 are fixedly connected to the outer surface of the rotating rod 53. Several transverse stirring rods 56 are fixedly connected to the outer surfaces of the arc-shaped stirring blades 55. The lower end of the servo motor 51 is fixedly connected to the upper end of the transparent mixing reactor 1, and the output end of the servo motor 51 passes through the upper end of the transparent mixing reactor 1 and extends into the interior of the transparent mixing reactor 1. Several arc-shaped stirring blades 55... A ring array of rotating rods 53 is arranged around the center, and several transverse stirring rods 56 are distributed in pairs at equal distances, each with a gap to the inner wall of the transparent mixing reactor 1; the acid mist absorption tank 2 includes a tank body 21 and a first tank cover 22, with a first sealing ring 23 fixedly connected to the lower end of the first tank cover 22, and a filter assembly 24 fixedly connected to the middle of the inner wall of the tank body 21, with the lower end of the tank body 21 inserted and fixedly connected to the upper end of the acid mist outlet pipe 6; the first sealing ring 23 is movably fitted inside the tank body 21, and the upper end of the first tank cover 22 is inserted and fixedly connected to the lower end of the acid mist emission pipe 7; the filter assembly 24 includes a first fixing frame 241, with a second fixing frame 242 fixedly connected to the upper end of the first fixing frame 241, and the upper end of the second fixing frame 242 is fixed A third fixing frame 243 is connected, and a fourth fixing frame 244 is fixedly connected to the upper end of the third fixing frame 243. A metal wire mesh 245 is embedded in the inner wall of the first fixing frame 241. A sodium hydroxide granular layer 246 is fixedly connected to the inner wall of the second fixing frame 242. A polytetrafluoroethylene nanofiber membrane 247 is fixedly connected to the inner wall of the third fixing frame 243. An activated carbon adsorption layer 248 is fixedly connected to the inner wall of the fourth fixing frame 244. The outer surfaces of the first fixing frame 241, the second fixing frame 242, the third fixing frame 243, and the fourth fixing frame 244 are all fixedly connected to the inner wall of the tank 21. The concentrated sulfuric acid storage assembly 3 includes a concentrated sulfuric acid storage tank 31, a water pump 32, and a second... The second tank cover 33 has a second sealing ring 34 fixedly connected to its lower end. A level gauge 35 is fixedly installed in the middle of the upper end of the second tank cover 33. A connecting pipe 36 is fixedly connected to the lower part of the outer surface of the concentrated sulfuric acid storage tank 31. An electromagnetic valve 37 is movably installed in the outer surface of the connecting pipe 36. A delivery pipe 38 is fixedly installed in the end of the water pump 32 near the concentrated sulfuric acid storage tank 31. An inlet pipe 39 is fixedly installed in the upper part of the outer surface of the water pump 32. The second tank cover 33 is movably fitted inside the concentrated sulfuric acid storage tank 31. The upper end of the delivery pipe 38 is fixedly connected to the lower end of the connecting pipe 36. The lower end of the inlet pipe 39 is fixedly connected to the upper end of the transparent mixing reactor 1 near the transparent mixing reactor 1.

[0038] It should be noted that this utility model is a laboratory reverse preparation device for sulfuric acid solution. During use, concentrated sulfuric acid is injected into the concentrated sulfuric acid storage tank 31, and simultaneously, reagent water storage component 4 is filled with reagent water. Then, the second tank cover 33 is placed on the concentrated sulfuric acid storage tank 31, and the second sealing ring 34 is fitted inside the concentrated sulfuric acid storage tank 31. At the same time, the monitoring head of the level gauge 35 is located inside the concentrated sulfuric acid storage tank 31, thus sealing the concentrated sulfuric acid storage tank 31. The reagent water storage component 4 is sealed using the same operating steps. Then, the device is opened. Pump 32 and solenoid valve 37 are used to pump concentrated sulfuric acid into the transparent mixing reactor 1. Under the pressure difference generated by pump 32, concentrated sulfuric acid flows through inlet pipe 39 and then through delivery pipe 38. At the same time, reagent water in reagent water storage component 4 flows into the transparent mixing reactor 1 in the same way. According to the required sulfuric acid solution concentration and reagent water volume, the liquid volume in the transparent mixing reactor 1 is observed through volume scale bar 10 to control the injection amount of reagent water and concentrated sulfuric acid. During this process, the concentrated sulfuric acid storage tank 31 is monitored in real time through level gauge 35. The remaining capacity of sulfuric acid and the remaining capacity of reagent water in reagent water storage component 4 are determined. Then, the servo motor 51 is started, and its output end drives the upper flange 52 to rotate, which in turn causes the rotating rod 53 to rotate. The arc-shaped stirring blade 55 and the horizontal stirring rod 56 on the rotating rod 53 stir and mix the concentrated sulfuric acid and reagent water in the transparent mixing reactor 1 to ensure that the two liquids are fully mixed. During the solution preparation process, the generated acid mist enters the acid mist absorption tank 2 through the acid mist outlet pipe 6. The acid mist passes through the metal wire mesh 245 of the filter component 24 in the acid mist absorption tank 2 to intercept larger particulate impurities. Then it passes through the sodium hydroxide particle layer 246, where the acidic gas and sodium hydroxide undergo a neutralization reaction. Then it passes through the polytetrafluoroethylene nanofiber membrane 247 to filter out small droplets and residual acid molecules. Finally, it passes through the activated carbon adsorption layer 248 to adsorb odors and a small amount of volatile organic pollutants. The purified acid mist is discharged through the acid mist emission pipe 7. After the preparation is completed, the switch valve 9 on the liquid outlet pipe 8 is opened to take out the prepared sulfuric acid solution from the transparent mixing reactor 1 for subsequent experiments.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A laboratory device for reverse preparation of sulfuric acid solution, comprising a transparent mixing reactor (1) and an acid mist absorption tank (2), characterized in that: The upper end of the transparent mixing reaction kettle (1) is fixedly connected with a concentrated sulfuric acid storage assembly (3) on one side, the upper end of the transparent mixing reaction kettle (1) is fixedly connected with a reagent water storage assembly (4) on the other side opposite to the concentrated sulfuric acid storage assembly (3), the reagent water storage assembly (4) and the concentrated sulfuric acid storage assembly (3) are the same structure and are mirror image distributed, a stirring mechanism (5) is installed in the central position of the upper end of the transparent mixing reaction kettle (1), an acid mist exhaust pipe (6) is fixedly connected with the rear of the upper end of the transparent mixing reaction kettle (1) and the upper end of the acid mist exhaust pipe (6) is fixedly connected with the lower end of an acid mist absorption tank (2), an acid mist discharge pipe (7) is fixedly connected with the upper end of the acid mist absorption tank (2), an outlet pipe (8) is fixedly connected with the right lower end of the transparent mixing reaction kettle (1), and a switch valve (9) is movably installed on the outer surface of the outlet pipe (8) and the outer surface of the acid mist exhaust pipe (6), and a group of capacity scale bars (10) are arranged on the outer surface of the transparent mixing reaction kettle (1). The stirring mechanism (5) comprises a servo motor (51), the output end of the servo motor (51) is fixedly connected with an upper flange (52), the lower end of the upper flange (52) is fixedly connected with a rotating rod (53), the lower end of the rotating rod (53) is fixedly connected with a lower flange (54), the lower end of the lower flange (54) is movably connected with the lower inner wall of the transparent mixing reaction kettle (1) through a rotating shaft, the outer surface of the rotating rod (53) is fixedly connected with a plurality of arc-shaped stirring blades (55), the outer surface of each of the plurality of arc-shaped stirring blades (55) is fixedly connected with a plurality of transverse stirring rods (56), and the lower end of the servo motor (51) is fixedly connected with the upper end of the transparent mixing reaction kettle (1) and the output end of the servo motor (51) penetrates through the upper end of the transparent mixing reaction kettle (1) and extends into the transparent mixing reaction kettle (1).

2. A laboratory apparatus for reverse preparation of sulfuric acid solution as claimed in claim 1 wherein: The plurality of arc-shaped stirring blades (55) are arranged in a central annular array of the rotating rod (53), and the plurality of transverse stirring rods (56) are arranged at equal distances two by two and have gaps with the inner wall of the transparent mixing reaction kettle (1).

3. The laboratory apparatus for reverse preparation of sulfuric acid solution as claimed in claim 1 wherein: The acid mist absorption tank (2) comprises a tank body (21) and a first tank cover (22), the lower end of the first tank cover (22) is fixedly connected with a first sealing ring (23), the inner wall of the tank body (21) is fixedly connected with a filter assembly (24) in the middle, and the lower end of the tank body (21) is fixedly connected with the upper end of the acid mist exhaust pipe (6).

4. A laboratory apparatus for reverse compounding sulfuric acid solutions as defined in claim 3, characterized in that: The first sealing ring (23) is movably sleeved in the tank body (21), and the upper end of the first tank cover (22) is fixedly connected with the lower end of the acid mist discharge pipe (7).

5. A laboratory apparatus for reverse preparation of sulfuric acid solution as claimed in claim 3 wherein: The filter assembly (24) includes a first fixed frame (241), the upper end of which is fixedly connected with a second fixed frame (242), the upper end of which is fixedly connected with a third fixed frame (243), the upper end of which is fixedly connected with a fourth fixed frame (244), the inner wall surface of the first fixed frame (241) is embedded with a wire mesh (245), the inner wall surface of the second fixed frame (242) is fixedly connected with a sodium hydroxide particle layer (246), the inner wall surface of the third fixed frame (243) is fixedly connected with a polytetrafluoroethylene nanofiber membrane (247), the inner wall surface of the fourth fixed frame (244) is fixedly connected with an activated carbon adsorption layer (248), and the outer surfaces of the first fixed frame (241), the second fixed frame (242), the third fixed frame (243) and the fourth fixed frame (244) are fixedly connected with the inner wall surface of the tank body (21).

6. The laboratory reverse preparation sulfuric acid solution device according to claim 1, characterized in that: The concentrated sulfuric acid storage assembly (3) includes a concentrated sulfuric acid storage tank (31), a water pump (32) and a second tank cover (33), the lower end of the second tank cover (33) is fixedly connected with a second sealing ring (34), the upper end of the second tank cover (33) is fixedly connected with a liquid level meter (35), the outer surface of the lower part of the concentrated sulfuric acid storage tank (31) is fixedly connected with a connecting pipe (36), the outer surface of the connecting pipe (36) is movably installed with an electromagnetic valve (37), and the one end of the water pump (32) close to the concentrated sulfuric acid storage tank (31) is fixedly installed with a liquid infusion pipe (38), and the outer surface of the upper part of the water pump (32) is fixedly installed with a liquid inlet pipe (39).

7. A laboratory apparatus for reverse compounding sulfuric acid solutions as defined in claim 6, characterized in that: The second tank cover (33) is movably sleeved in the concentrated sulfuric acid storage tank (31), the upper end of the liquid infusion pipe (38) is fixedly connected with the lower end of the connecting pipe (36), and the lower end of the liquid inlet pipe (39) is fixedly connected with the upper end of the transparent mixing reaction kettle (1).

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