A concentrated sulfuric acid vacuum feeding device

Abstract

The present disclosure provides a concentrated sulfuric acid vacuum feeding device, which belongs to the technical field of concentrated sulfuric acid conveying. The concentrated sulfuric acid vacuum feeding device comprises a box body, a sulfuric acid pouring assembly arranged in the box body and used for pouring concentrated sulfuric acid, a collector arranged below the sulfuric acid pouring assembly and used for guiding the flow of concentrated sulfuric acid, a backwater collecting elbow arranged at the liquid outlet end of the collector and having a U-shaped cross section, a vacuum buffer tank arranged above the sulfuric acid pouring assembly and communicated with the backwater collecting elbow through a vacuum acid pumping pipe, a weighing module arranged on the vacuum buffer tank, and a vacuum pump assembly arranged on one side of the box body and communicated with the vacuum buffer tank through a vacuum pipe, wherein the vacuum pump assembly is used for generating negative pressure to extract concentrated sulfuric acid into the vacuum buffer tank. The concentrated sulfuric acid vacuum feeding device realizes safe, rapid and continuous feeding of concentrated sulfuric acid, accurately controls the addition amount of concentrated sulfuric acid, and improves the feeding precision and reliability of concentrated sulfuric acid.

Description

Technical Field

[0001] This disclosure relates to the field of concentrated sulfuric acid conveying technology, and in particular to a concentrated sulfuric acid vacuum feeding device. Background Technology

[0002] In industrial production, concentrated sulfuric acid, a key chemical raw material with strong corrosive and oxidizing properties, has always been a key research topic in terms of its safe and efficient transfer and feeding. In graphene production lines and other small-scale sulfuric acid reactions, the feeding of concentrated sulfuric acid largely relies on manual operation. Operators need to directly contact the containers holding the concentrated sulfuric acid and manually perform a series of operations such as opening, handling, and pouring to add the concentrated sulfuric acid to the reaction equipment.

[0003] However, manually adding concentrated sulfuric acid presents numerous serious problems that severely restrict production safety and efficiency. During manual operation, operators must be in close contact with the containers holding the concentrated sulfuric acid. Even with protective gear, slippage during handling and pouring can cause the containers to fall, or improper handling during opening or pouring can lead to splashing of concentrated sulfuric acid, easily causing serious burns, chemical poisoning, and other safety accidents.

[0004] Meanwhile, manual addition is inefficient. Operators must sequentially perform a series of actions, including acid collection, handling, and pouring, which not only consumes significant manpower and time but also fails to achieve continuous, automated operation, making it difficult to meet the high-efficiency production requirements of modern industrial production. Furthermore, due to differences in operators' techniques, force, and pouring angles, manual pouring makes it difficult to precisely control the amount of concentrated sulfuric acid added, resulting in significant errors in the amount added each time. In processes such as graphene production, where the precision of raw material proportions is extremely important, this error directly affects product quality stability, leading to unstable product performance and an increased defect rate.

[0005] To solve the above problems, a vacuum feeding device for concentrated sulfuric acid was designed. Utility Model Content

[0006] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a concentrated sulfuric acid vacuum feeding device to improve the feeding efficiency, feeding accuracy and feeding safety of concentrated sulfuric acid.

[0007] To achieve the aforementioned objectives of this utility model, the present disclosure adopts the following technical solution:

[0008] A concentrated sulfuric acid vacuum feeding device, comprising:

[0009] Box;

[0010] A sulfuric acid pouring assembly is installed inside the tank, and the sulfuric acid pouring assembly is used to pour concentrated sulfuric acid.

[0011] A collector is located below the sulfuric acid pouring assembly, and the collector is used to guide the concentrated sulfuric acid.

[0012] A return water collection bend is provided at the liquid outlet end of the collector, and the cross-section of the return water collection bend is U-shaped;

[0013] A vacuum buffer tank is located above the sulfuric acid pouring assembly. The vacuum buffer tank is connected to the return water collection bend via a vacuum acid extraction pipe. A weighing module is installed on the vacuum buffer tank.

[0014] A vacuum pump assembly is located on one side of the housing. The vacuum pump assembly is connected to the vacuum buffer tank via a vacuum pipe. The vacuum pump assembly is used to generate negative pressure to draw the concentrated sulfuric acid into the vacuum buffer tank.

[0015] In one exemplary embodiment of this disclosure, the sulfuric acid pouring assembly includes:

[0016] A mounting plate is disposed inside the box, and an opening is provided on the mounting plate, into which the collector is installed;

[0017] A mounting bracket is provided above the opening and above the collector. The mounting bracket has a U-shaped cross-section and at least one guide rod is provided inside the mounting bracket.

[0018] Two limiting blocks are symmetrically slidably mounted on the guide rod, with the sulfuric acid bottle located between the two limiting blocks. The two limiting blocks are used to radially limit the sulfuric acid bottle.

[0019] A drive motor is mounted on one side wall of the housing. The drive motor is used to drive the mounting bracket to rotate so as to pour concentrated sulfuric acid into the collector.

[0020] Two locking components are slidably mounted on the guide rod. The two locking components are located on opposite sides of the two limiting blocks, and the locking components are used to lock the limiting blocks.

[0021] In one exemplary embodiment of this disclosure, a screw is provided at the top of the limiting block, and a limiting plate is movably mounted on the two screws. The limiting plate is used to axially limit the sulfuric acid bottle. A nut is threaded onto the screw, and the nut is located on the side of the limiting plate away from the limiting block.

[0022] In one exemplary embodiment of this disclosure, the collector includes:

[0023] A tapered portion is disposed within the opening, and the tapered portion is located below the mounting bracket;

[0024] An arc-shaped portion is provided on the side of the conical portion away from the mounting bracket, the top end of the arc-shaped portion extends upward, and the two side walls of the arc-shaped portion bend inward;

[0025] The water return collection bend is connected to the bottom end of the arc-shaped section.

[0026] In one exemplary embodiment of this disclosure, a splash guard is provided in the lower part of the collector.

[0027] In one exemplary embodiment of this disclosure, an acid discharge valve is provided at the bottom end of the return water collection bend;

[0028] A protective tube is fitted onto the vacuum acid extraction tube.

[0029] In one exemplary embodiment of this disclosure, the vacuum buffer tank includes:

[0030] The tank body has multiple lugs on its circumferential outer wall, and the lugs are mounted on the top of the tank body via the weighing module;

[0031] A liquid outlet pipe is located at the bottom of the tank body, and a liquid outlet valve is installed on the liquid outlet pipe.

[0032] In one exemplary embodiment of this disclosure, the vacuum pump assembly includes a vacuum pump and a water tank;

[0033] The vacuum pump and the vacuum buffer tank are connected by the vacuum pipe, and the water tank is used to supply circulating water to the vacuum pump.

[0034] In one exemplary embodiment of this disclosure, the feeding device further includes a control box, which is disposed on the outer wall of one side of the box body. The control box is electrically connected to the sulfuric acid pouring assembly, the vacuum buffer tank, the weighing module, and the vacuum pump assembly.

[0035] In one exemplary embodiment of this disclosure, a collection trough is provided at the bottom of the box, and a drain pipe is provided at the outlet of the collection trough.

[0036] The beneficial effects of this disclosure are:

[0037] (1) This disclosure adopts a fully enclosed vacuum feeding system, which completely isolates the operator from concentrated sulfuric acid, eliminates safety hazards caused by human error, failure of protection and other factors, and provides reliable safety protection for the operator.

[0038] (2) This disclosure achieves rapid and continuous feeding of concentrated sulfuric acid through the coordinated operation of the sulfuric acid pouring component and the vacuum conveying system, which greatly improves the feeding efficiency, meets the needs of modern industrial production for efficient operation, and effectively reduces labor and time costs.

[0039] (3) This disclosure uses a high-precision weighing module to accurately measure the weight of concentrated sulfuric acid in the vacuum buffer tank in real time, thereby achieving precise control of the amount of concentrated sulfuric acid added, controlling the error of the amount of sulfuric acid added each time to a very small range, ensuring the accuracy and stability of the raw material ratio during the production process, effectively improving product quality, reducing the defect rate, reducing production costs, and enhancing the market competitiveness of enterprises. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0041] Figure 1 This is a schematic diagram of the structure of a concentrated sulfuric acid vacuum feeding device in one embodiment of the present disclosure;

[0042] Figure 2 This is a schematic diagram of the internal structure of the box in one embodiment of the present disclosure;

[0043] Figure 3 This is a schematic diagram of the structure of a sulfuric acid pouring assembly in one embodiment of the present disclosure;

[0044] Figure 4 This is a schematic diagram of the collector in one embodiment of the present disclosure;

[0045] Figure 5 This is a schematic diagram of the structure of a vacuum buffer tank in one embodiment of the present disclosure;

[0046] Figure 6 This is a schematic diagram of the weighing module in one embodiment of the present disclosure;

[0047] Figure 7 This is a schematic diagram of the overall structure of the housing in one embodiment of the present disclosure.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Tank body; 2. Sulfuric acid pouring assembly; 3. Collector; 4. Return water collection bend; 5. Vacuum buffer tank; 6. Vacuum acid extraction pipe; 7. Weighing module; 8. Vacuum pump assembly; 9. Vacuum pipe; 10. Mounting plate; 11. Port; 12. Mounting bracket; 13. Guide rod; 14. Limiting block; 15. Sulfuric acid bottle; 16. Drive motor; 17. Locking element; 18. Screw; 19. Limiting plate; 20. Nut; 21. Conical part; 22. Arc-shaped part; 23. Splash guard; 24. Acid discharge valve; 25. Protective pipe; 26. Tank body; 27. Support lug; 28. Discharge pipe; 29. ​​Discharge valve; 30. Vacuum pump; 31. Water tank; 32. Hose; 33. Control box; 34. Collection trough; 35. Discharge pipe; 36. Glass door; 37. Magnetic door catch. Detailed Implementation

[0050] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0051] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0052] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0053] This disclosure provides a concentrated sulfuric acid vacuum feeding device. See [link to relevant documentation]. Figure 1The system includes: a housing 1; a sulfuric acid pouring assembly 2, located inside the housing 1, used for pouring concentrated sulfuric acid; a collector 3, located below the sulfuric acid pouring assembly 2, used for guiding the concentrated sulfuric acid; a return water collection bend 4, located at the outlet end of the collector 3, with a U-shaped cross-section; a vacuum buffer tank 5, located above the sulfuric acid pouring assembly 2, connected to the return water collection bend 4 via a vacuum extraction pipe 6, and equipped with a weighing module 7; and a vacuum pump assembly 8, located on one side of the housing 1, connected to the vacuum buffer tank 5 via a vacuum pipe 9, used to generate negative pressure to draw concentrated sulfuric acid into the vacuum buffer tank 5.

[0054] In this embodiment, the concentrated sulfuric acid vacuum feeding device comprises a housing 1, a sulfuric acid pouring assembly 2, a collector 3, a vacuum buffer tank 5, a weighing module 7, and a vacuum pump assembly 8. The vacuum buffer tank 5, the sulfuric acid pouring assembly 2, and the collector 3 are installed sequentially from top to bottom inside the housing 1. The vacuum pump assembly 8 is installed on one side of the housing 1. A return water collection bend 4 is installed at the outlet at the bottom of the collector 3, and a U-shaped bend is formed on the return water collection bend 4. A vacuum extraction pipe 6 is connected between the vacuum buffer tank 5 and the return water collection bend 4. The weighing module 7 is installed on the vacuum buffer tank 5, and a vacuum pipe 9 is connected between the vacuum buffer tank 5 and the vacuum pump assembly 8. Concentrated sulfuric acid is poured evenly and stably into the collector 3 through the sulfuric acid pouring assembly 2. The concentrated sulfuric acid is guided into the return water collection bend 4 through the collector 3. The vacuum pump assembly 8 generates negative pressure, and the concentrated sulfuric acid in the return water collection bend 4 is transported to the vacuum buffer tank 5 through the vacuum extraction pipe 6. The weight of the concentrated sulfuric acid in the vacuum buffer tank 5 is accurately measured in real time by the high-precision weighing module 7.

[0055] Compared to existing methods of manually adding concentrated sulfuric acid, this vacuum sulfuric acid feeding device completely isolates operators from the concentrated sulfuric acid through a enclosure, eliminating safety hazards caused by human error or protective failure, and providing reliable safety for operators. Through the coordinated operation of the sulfuric acid pouring component and the vacuum conveying system, rapid and continuous feeding of concentrated sulfuric acid is achieved, significantly improving feeding efficiency and meeting the demands of modern industrial production for high-efficiency operations, effectively reducing labor and time costs. A high-precision weighing module accurately measures the weight of the concentrated sulfuric acid in the vacuum buffer tank in real time, enabling precise control of the amount of concentrated sulfuric acid added. This minimizes the error in the amount of sulfuric acid added each time, ensuring the accuracy and stability of raw material proportions during production, effectively improving product quality, reducing defect rates, lowering production costs, and enhancing the company's market competitiveness.

[0056] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 and Figure 7The enclosure 1 includes a main frame, with metal plates installed at the top and bottom. A glass door 36 is installed on one side of the main frame, and explosion-proof glass is installed on the remaining sides of the main frame. This creates a closed and visible operating space, facilitating observation of the operations inside the enclosure 1 and effectively preventing accidental leakage and spread of concentrated sulfuric acid.

[0057] Optionally, see Figure 1 The main frame has at least one magnetic door catch 37 that is compatible with the glass door 36, and a sealing strip is provided between the glass door 36 and the main frame. In this way, the airtightness of the enclosure 1 can be improved.

[0058] Optionally, the main frame is a metal frame.

[0059] For example, the main frame is a high-strength aluminum alloy frame.

[0060] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 and Figure 3 The sulfuric acid pouring assembly 2 includes: a mounting plate 10, located inside the housing 1, with an opening 11 on the mounting plate 10, and a collector 3 installed inside the opening 11; a mounting frame 12, located above the opening 11 and above the collector 3, with a U-shaped cross-section, and at least one guide rod 13 installed inside the mounting frame 12; two limiting blocks 14, symmetrically slidingly mounted on the guide rod 13, with a sulfuric acid bottle 15 located between the two limiting blocks 14, and the two limiting blocks 14 used to radially limit the sulfuric acid bottle 15; and a drive motor 16, located on one side wall of the housing 1, used to drive the mounting frame 12 to rotate, so as to pour concentrated sulfuric acid into the collector 3; wherein, two locking members 17 are slidably mounted on the guide rod 13, the two locking members 17 being located on the opposite sides of the two limiting blocks 14, and the locking members 17 are used to lock the limiting blocks 14. In this way, concentrated sulfuric acid in the sulfuric acid bottle 15 can be slowly and steadily poured into the collector 3 below.

[0061] Optionally, see Figure 2 and Figure 3 Support frames are provided on both sides of the opening 11. The support frames are mounted on the mounting plate 10. The mounting frame 12 is rotatably mounted on the support frames. The output shaft of the drive motor 16 passes through one of the support frames and is connected to the mounting frame 12 to drive the mounting frame 12 to rotate. The output shaft of the drive motor 16 is rotatably connected to the support frame.

[0062] Optionally, slots are provided on the side walls of the two limiting blocks 14 that are close to each other, and the two limiting blocks 14 radially limit the sulfuric acid bottle 15 through the slots.

[0063] In one example, there are four guide rods 13, which are respectively set at the four corners of the mounting frame 12. That is, two guide rods 13 are set on each side of the mounting frame 12 along the length direction, and the sulfuric acid bottle 15 is located between the two guide rods 13.

[0064] It is understandable that when there are four guide rods 13, two locking elements 17 can be installed on one or more of the four guide rods 13, or two locking elements 17 can be installed on all four guide rods 13.

[0065] Optionally, the locking element 17 includes an annular locking sleeve and a bolt. The annular locking sleeve is fitted onto the guide rod 13, and the annular locking sleeve is locked to the guide rod 13 by the bolt.

[0066] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 and Figure 3 The limiting block 14 has a screw 18 at its top, and two limiting plates 19 are movably mounted on the two screws 18. The limiting plates 19 are used to axially limit the sulfuric acid bottle 15. Nuts 20 are threaded onto the screws 18, and the nuts 20 are located on the side of the limiting plates 19 away from the limiting block 14. In this way, the sulfuric acid bottle 15 can be limited at multiple angles, improving the stability of the sulfuric acid bottle 15 when tilting, preventing the sulfuric acid bottle 15 from shaking or shifting in subsequent operations, and thus improving the safety of sulfuric acid tilting.

[0067] Optionally, the screw 18 is installed at the center of the top of the limit block 14.

[0068] It is understandable that the limiting plate 19 has a first through hole at each end and a second through hole in the middle. The limiting plate 19 is sleeved on the two screws 18 through the two first through holes and sleeved on the sulfuric acid bottle 15 through the second through hole, thereby axially limiting the sulfuric acid bottle 15.

[0069] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 4 The collector 3 includes: a conical portion 21 disposed within the opening 11, located below the mounting frame 12; and an arc-shaped portion 22 disposed on the side of the conical portion 21 away from the mounting frame 12, with the top of the arc-shaped portion 22 extending upward and the side walls of the arc-shaped portion 22 curving inward; wherein, a return water collection bend 4 is connected to the bottom end of the arc-shaped portion 22. This reduces splashing of sulfuric acid droplets during pouring and allows concentrated sulfuric acid to flow quickly and smoothly downward.

[0070] Optionally, the inner wall of collector 3 is polished. This reduces the adhesion of concentrated sulfuric acid to the inner wall of collector 3.

[0071] Optionally, the cone angle of the tapered portion 21 is 45 to 60 degrees.

[0072] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 A splash guard 23 is installed in the lower part of the collector 3. This can further intercept and disperse the splashed sulfuric acid droplets generated during the pouring of sulfuric acid, and prevent sulfuric acid from splashing.

[0073] Optionally, the splash guard 23 covers the liquid outlet at the bottom of the collector 3.

[0074] Optionally, the splash guard 23 is made of polytetrafluoroethylene (PTFE). This gives the splash guard 23 excellent corrosion resistance and liquid repellency, thus extending its service life.

[0075] It is understandable that the splash guard 23 and the collector 3 work together to form a double splash guard design, which improves the splash guard effect of the device, increases the service life of the device, and enhances the safety of the device.

[0076] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 , Figure 2 and Figure 4 A discharge valve 24 is installed at the bottom of the return water collection bend 4.

[0077] In the above embodiment, a U-shaped bend is formed on the return water collection bend 4. One end of the U-shaped bend is connected to the bottom end of the collector 3, and the other end of the U-shaped bend is connected to the bottom end of the vacuum acid extraction pipe 6. The acid discharge valve 24 is set at the bottom end of the U-shaped bend. The U-shaped bend is used to prevent air backflow during the feeding of concentrated sulfuric acid and ensure the stability of the vacuum system. After the concentrated sulfuric acid feeding is completed, the residue in the return water collection bend 4 is discharged through the acid discharge valve 24 for recycling, so as to avoid waste or safety hazards caused by residual sulfuric acid.

[0078] Optionally, the acid discharge valve 24 is a solenoid valve.

[0079] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 A protective tube 25 is fitted onto the vacuum acid extraction tube 6. This protects the vacuum acid extraction tube 6 from damage due to accidental impact or corrosion.

[0080] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 5 and Figure 6 The vacuum buffer tank 5 includes a tank body 26, with multiple lugs 27 arranged on the outer circumference of the tank body 26. The lugs 27 are mounted on the top of the tank body 1 via a weighing module 7. This allows for real-time and accurate detection of the weight of concentrated sulfuric acid inside the vacuum buffer tank 5, enabling precise control of the amount of concentrated sulfuric acid added and reducing errors in concentrated sulfuric acid feeding.

[0081] Optionally, see Figure 1The outlet pipe 28 is located at the bottom of the tank body 26, and an outlet valve 29 is installed on the outlet pipe 28. In this way, concentrated sulfuric acid in the vacuum buffer tank 5 can be discharged.

[0082] Optionally, the outlet valve 29 is an electric valve.

[0083] Optionally, the liquid outlet pipe 28 is connected to the reaction vessel.

[0084] Optionally, see Figure 5 The vacuum buffer tank 5 is equipped with a liquid inlet, a vacuum port, and a venting port at the top, and a liquid outlet at the bottom. The vacuum pipe 9 is connected to the vacuum buffer tank 5 through the vacuum port, the vacuum acid extraction pipe 6 is connected to the vacuum buffer tank 5 through the liquid inlet, the liquid outlet pipe 28 is connected to the vacuum buffer tank 5 through the liquid outlet, and a venting valve is installed on the venting port.

[0085] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 The vacuum pump assembly 8 includes a vacuum pump 30 and a water tank 31; the vacuum pump 30 and the vacuum buffer tank 5 are connected by a vacuum pipe 9, and the water tank 31 is used to supply circulating water to the vacuum pump 30. In this way, a continuous negative pressure can be generated, and the concentrated sulfuric acid in the return water collection bend 4 can be quickly and stably transported to the vacuum buffer tank 5 through the vacuum acid extraction pipe 6.

[0086] Optionally, the vacuum tube 9 is connected to the vacuum port via a flexible hose 32.

[0087] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 7 The feeding device also includes a control box 33, which is located on the outer wall of one side of the housing 1. The control box 33 is electrically connected to the sulfuric acid pouring assembly 2, the vacuum buffer tank 5, the weighing module 7, and the vacuum pump assembly 8. In this way, intelligent control of the device can be realized, thereby improving the efficiency and accuracy of concentrated sulfuric acid feeding.

[0088] Optionally, the control box 33 is equipped with a servo controller, a processor and a memory. A display screen and a control panel are installed on one side of the outer wall of the control box 33. The processor is electrically connected to the weighing module 7, the servo controller, the memory, the display screen and the control panel respectively. The servo controller is electrically connected to the drive motor 16, the acid discharge valve 24, the liquid outlet valve 29, the venting valve and the vacuum pump 30 respectively.

[0089] Understandably, the control panel presets the sulfuric acid feeding parameters and controls the operation of the device. The display screen shows the device's operating parameters. The processor processes various data of the device, the memory stores the processed data, and the servo controller controls the opening and closing of the outlet valve 29 based on the weighing results of the weighing module 7.

[0090] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 and Figure 7 A collection tank 34 is provided at the bottom of the tank body 1, and a drain pipe 35 is provided at the outlet of the collection tank 34. In this way, the concentrated sulfuric acid discharged from the acid discharge valve 24 can be discharged from the tank body 1 and recycled, avoiding damage to the tank body 1.

[0091] In one embodiment of this disclosure, see Figures 1 to 7 The working process of this concentrated sulfuric acid vacuum feeding device is briefly described as follows:

[0092] In use, the glass door 36 is first opened, and the sulfuric acid bottle 15 containing concentrated sulfuric acid is placed inside the mounting bracket 12 and clamped by two limit blocks 14 and locked in place by two locking pieces 17. A limit plate 19 is then fitted onto the top of the sulfuric acid bottle 15 and locked in place by nuts 20, thus securing the sulfuric acid bottle 15 firmly and preventing it from shaking or shifting during subsequent pouring. The glass door 36 is then closed, and the operator inputs the set parameters through the control panel, then starts the drive motor 16, which drives the mounting bracket 12 to rotate slowly, causing the sulfuric acid bottle 15 to rotate and allowing it to tilt smoothly, with the concentrated sulfuric acid flowing into the collection container below. Inside the collector 3, the collector 3 and its lower splash guard 23 work together to effectively prevent sulfuric acid from splashing. After being guided by the collector 3, the concentrated sulfuric acid enters the return water collection bend 4. The vacuum pump 30 is started, and under the action of vacuum negative pressure, the concentrated sulfuric acid is drawn into the vacuum buffer tank 5 through the vacuum acid extraction pipe 6. During this process, the weighing module 7 accurately measures the weight of the concentrated sulfuric acid in the vacuum buffer tank 5 in real time. When it is necessary to discharge the concentrated sulfuric acid into the reactor, the venting valve and the liquid outlet valve 29 on the vacuum buffer tank 5 are opened in sequence, and the concentrated sulfuric acid flows into the reactor under the action of pressure and gravity. After the concentrated sulfuric acid is fed, the acid discharge valve 24 is opened to recover the concentrated sulfuric acid remaining in the return water collection bend 4.

[0093] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A concentrated sulfuric acid vacuum feeding device, characterized in that, include: Box (1); A sulfuric acid pouring assembly (2) is provided inside the box (1) and is used to pour concentrated sulfuric acid. A collector (3) is located below the sulfuric acid pouring assembly (2), and the collector (3) is used to guide the concentrated sulfuric acid. A return water collection bend (4) is provided at the liquid outlet end of the collector (3), and the cross-section of the return water collection bend (4) is U-shaped; A vacuum buffer tank (5) is located above the sulfuric acid pouring assembly (2). The vacuum buffer tank (5) is connected to the return water collection bend (4) through a vacuum acid extraction pipe (6). A weighing module (7) is provided on the vacuum buffer tank (5). A vacuum pump assembly (8) is located on one side of the housing (1). The vacuum pump assembly (8) is connected to the vacuum buffer tank (5) via a vacuum tube (9). The vacuum pump assembly (8) is used to generate negative pressure to draw the concentrated sulfuric acid into the vacuum buffer tank (5).

2. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, The sulfuric acid pouring assembly (2) includes: An installation plate (10) is provided inside the housing (1), and an opening (11) is provided on the installation plate (10). The collector (3) is installed in the opening (11). Mounting bracket (12) is provided above the opening (11). The mounting bracket (12) is located above the collector (3). The cross-section of the mounting bracket (12) is U-shaped. At least one guide rod (13) is provided inside the mounting bracket (12). Limiting blocks (14), two limiting blocks (14) are symmetrically slidably mounted on the guide rod (13), and the sulfuric acid bottle (15) is located between the two limiting blocks (14). The two limiting blocks (14) are used to radially limit the sulfuric acid bottle (15). A drive motor (16) is provided on one side wall of the housing (1). The drive motor (16) is used to drive the mounting bracket (12) to rotate so as to pour concentrated sulfuric acid into the collector (3). Two locking members (17) are slidably installed on the guide rod (13). The two locking members (17) are located on the side of the two limiting blocks (14) that are far apart from each other. The locking members (17) are used to lock the limiting blocks (14).

3. The concentrated sulfuric acid vacuum feeding device according to claim 2, characterized in that, The top of the limiting block (14) is provided with a screw (18), and two limiting plates (19) are movably installed on the two screws (18). The limiting plates (19) are used to axially limit the sulfuric acid bottle (15). Nuts (20) are threadedly connected to the screws (18), and the nuts (20) are located on the side of the limiting plates (19) away from the limiting block (14).

4. The concentrated sulfuric acid vacuum feeding device according to claim 2, characterized in that, The collector (3) includes: A tapered portion (21) is provided inside the opening (11), and the tapered portion (21) is located below the mounting bracket (12); An arc-shaped portion (22) is provided on the side of the conical portion (21) away from the mounting bracket (12), the top end of the arc-shaped portion (22) extends upward, and the two side walls of the arc-shaped portion (22) are bent inward; The return water collection bend (4) is connected to the bottom end of the arc-shaped part (22).

5. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, A splash guard (23) is provided in the lower part of the collector (3).

6. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, The bottom end of the return water collection bend (4) is equipped with an acid discharge valve (24); A protective tube (25) is fitted onto the vacuum acid extraction tube (6).

7. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, The vacuum buffer tank (5) includes: The tank (26) has multiple lugs (27) on its circumferential outer wall, and the lugs (27) are located at the top of the box (1) through the weighing module (7); A liquid outlet pipe (28) is located at the bottom end of the tank body (26), and a liquid outlet valve (29) is provided on the liquid outlet pipe (28).

8. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, The vacuum pump assembly (8) includes a vacuum pump (30) and a water tank (31); The vacuum pump (30) and the vacuum buffer tank (5) are connected by the vacuum pipe (9), and the water tank (31) is used to supply circulating water to the vacuum pump (30).

9. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, The feeding device also includes a control box (33), which is located on the outer wall of one side of the box body (1). The control box (33) is electrically connected to the sulfuric acid pouring assembly (2), the vacuum buffer tank (5), the weighing module (7), and the vacuum pump assembly (8).

10. The concentrated sulfuric acid vacuum feeding device according to claim 1, characterized in that, The bottom of the box (1) is provided with a collection tank (34), and the outlet of the collection tank (34) is provided with a drain pipe (35).

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