A preparation device for purifying sulfuric acid

Abstract

The present invention discloses a preparation device for purifying sulfuric acid, which belongs to the field of concentrated sulfuric acid purification. The device comprises a purification box, a cover plate is provided above the purification box, a drive motor is provided on the cover plate, an output end of the drive motor is connected to an evaporation preparation tank via a drive member, an inner wall of the evaporation preparation tank is fixedly connected to an axis column, a steam collection hood is provided on the cover plate, a steam extraction pipe is provided on the top of the steam collection hood, the steam collection hood is connected to a plurality of resistive heating plates via a linkage adjustment member, and a suction fan blade located in the steam collection hood is connected to the top of the axis column via a transmission assembly. The present invention rotates the sulfuric acid in the evaporation preparation tank, and under the action of centrifugal force, the internal dilute sulfuric acid enters and flows outward under the action of centrifugal force. During the process of flowing outward, the dilute sulfuric acid is heated and evaporated by the resistive heating plate, thereby achieving rapid evaporation of more water in the low-concentration sulfuric acid solution, significantly improving the purification efficiency of sulfuric acid.

Description

Technical Field

[0001] The present invention relates to the technical field of concentrated sulfuric acid purification, in particular to a preparation device for purifying sulfuric acid. Background Art

[0002] Sulfuric acid is the most active binary inorganic strong acid and can react with most metals. High concentrations of sulfuric acid have strong water absorption and can be used as a dehydrating agent to carbonize wood, paper, cotton and linen fabrics, biological skins and flesh, and other carbohydrate-containing materials.

[0003] After preparation, the concentration of sulfuric acid often does not meet the standard, and the dilute sulfuric acid needs to be purified. The current mainstream purification method is to heat the dilute sulfuric acid, control the temperature at about 120 to 130 degrees, and evaporate the water to distill and remove the water to achieve the purification of sulfuric acid. Various equipment only have different processing methods. However, the current preparation and purification of concentrated sulfuric acid directly heats the dilute sulfuric acid. The mixed water will evaporate only after the dilute sulfuric acid has absorbed all the heat, which consumes a lot of heat energy. In addition, as the concentration of dilute sulfuric acid increases during heating, it will make it more difficult to evaporate the water, affecting the purification efficiency. For this reason, a preparation device for purifying sulfuric acid is first proposed. Summary of the Invention

[0004] The present invention aims to solve the problem that in the prior art, the preparation and purification of concentrated sulfuric acid is carried out by directly heating dilute sulfuric acid. Mixed water will evaporate only after the dilute sulfuric acid has completely absorbed heat, which consumes a lot of heat energy. In addition, as the concentration of the dilute sulfuric acid increases during heating, the evaporation of water becomes more difficult, thereby affecting the purification efficiency. A preparation device for purifying sulfuric acid is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A preparation device for purifying sulfuric acid, comprising a purification box, a cover plate disposed above the purification box, a drive motor disposed on the cover plate, an output end of the drive motor connected to an evaporation preparation tank via a drive member, an axis column fixedly connected to the inner wall of the evaporation preparation tank, a steam collection hood disposed on the cover plate, a steam extraction pipe disposed on the top of the steam collection hood, the steam collection hood connected to a plurality of resistive heating plates via a linkage adjustment member, and a suction fan blade located within the steam collection hood connected to the top of the axis column via a transmission assembly;

[0007] A liquid exchange rack is provided on one side of the purification box, a liquid injection tank body is provided on the liquid exchange rack, a liquid return pipe and a liquid inlet pipe are provided on the liquid injection tank body, the liquid return pipe and the liquid inlet pipe are connected to the evaporation preparation tank through a heat exchange energy-saving component, a hydraulic cylinder is provided on the liquid exchange rack, and the end of the hydraulic cylinder passes through the liquid injection tank body and is fixedly connected to a piston disk.

[0008] Preferably, the driving member includes a driving gear ring fixedly connected to the outer wall of the evaporation preparation tank, the output end of the driving motor extends downward through the cover plate and is fixedly connected to a driving gear, and the driving gear is meshed with the outer wall of the driving gear ring.

[0009] Preferably, the linkage adjustment member includes an adjustment shaft fixedly connected to the resistive heating plate, the adjustment shaft extends upward through the side wall of the steam collection hood, and is fixedly connected to an internal gear, and the steam collection hood is rotatably provided with a control gear ring meshing with multiple internal gears.

[0010] Preferably, a plurality of mounting openings are provided on the steam collection hood, and the inner walls of the mounting openings are rotatably connected to a rotating shaft via a connecting bracket, and the suction fan blades are arranged on the rotating shaft.

[0011] Preferably, the transmission assembly includes a central gear connected to the shaft column through a connecting shaft, a transmission gear is fixedly connected to the bottom of the rotating shaft, and a plurality of the transmission gears are meshed and connected with the central gear.

[0012] Preferably, the heat exchange energy-saving component includes a plurality of liquid return channels opened on the evaporation preparation tank, an infusion channel is opened on the axis column, and a plurality of infusion holes connected to the infusion channel are opened on the outer wall of the axis column.

[0013] Preferably, the liquid return channel consists of a horizontal through-port distributed at the bottom of the evaporation preparation tank and a plurality of liquid return holes arranged around the evaporation preparation tank.

[0014] Preferably, a heat exchange spiral tube is provided at the bottom of the purification box, and the heat exchange spiral tube consists of a spiral inner tube and a spiral outer tube. One end of the spiral inner tube is connected to the liquid inlet pipe, and the other end is connected to the infusion channel. One end of the spiral outer tube is connected to the return liquid pipe, and the other end is connected to the return liquid channel.

[0015] Preferably, a plurality of one-way valves are provided on both sides of the liquid injection tank body, and the liquid return pipe and the liquid inlet pipe are connected to the liquid injection tank body through the one-way valves respectively.

[0016] Preferably, a rotating support ring is provided on the inner wall of the purification box, and the rotating support ring is rotatably connected to the evaporation preparation tank through a bearing.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention rotates the sulfuric acid in the evaporation preparation tank, and under the action of centrifugal force, the internal dilute sulfuric acid enters and flows to the outside under the action of centrifugal force. In the process of flowing to the outside, the dilute sulfuric acid is heated and evaporated by the resistive heating plate, so that the sulfuric acid concentration on the outside is greater than the concentration of the internal sulfuric acid. During the heating process, the dilute sulfuric acid in the middle flowing to the surrounding areas is always targeted, so that more water in the low-concentration sulfuric acid solution is quickly evaporated, and the purification efficiency of sulfuric acid is significantly improved.

[0019] 2. The present invention continuously extracts the highly concentrated sulfuric acid that has been purified externally through the liquid return pipe under the action of the liquid injection tank, and transports the dilute sulfuric acid that needs to be purified through the liquid inlet pipe, thereby realizing uninterrupted processing and significantly improving the preparation efficiency of concentrated sulfuric acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a device for preparing purified sulfuric acid proposed in the present invention;

[0021] Figure 2 This is a schematic diagram of the main cross-sectional structure of a device for preparing purified sulfuric acid proposed in the present invention;

[0022] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 This is a schematic top-view cross-sectional structural diagram of a device for preparing purified sulfuric acid proposed in the present invention;

[0024] Figure 5 This is a schematic top view of the structure of a steam collection hood in a device for preparing purified sulfuric acid proposed in the present invention;

[0025] Figure 6 The present invention provides a schematic diagram of the cross-sectional structure of a liquid injection tank in a device for preparing purified sulfuric acid.

[0026] In the figure: 1. Purification box; 2. Cover plate; 3. Drive motor; 4. Evaporation preparation tank; 5. Axis column; 6. Steam collection hood; 7. Steam extraction pipe; 8. Resistive heating plate; 9. Suction fan blade; 10. Liquid injection tank; 11. Return pipe; 12. Liquid inlet pipe; 13. Hydraulic cylinder; 14. Piston disk; 15. Drive gear ring; 16. Drive gear; 17. Adjustment shaft; 18. Internal gear; 19. Control gear ring; 20. Rotating shaft; 21. Center gear; 22. Transmission gear; 23. Infusion channel; 24. Infusion hole; 25. Horizontal port; 26. Return hole; 27. Heat exchange spiral tube; 28. One-way valve; 29. ​​Rotating support ring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] Reference Figure 1-6 A preparation device for purifying sulfuric acid includes a purification box 1, a cover plate 2 is provided above the purification box 1, and a drive motor 3 is provided on the cover plate 2. The drive motor 3 is a type of servo motor, which is a prior art and will not be described in detail here. The output end of the drive motor 3 is connected to the evaporation preparation tank 4 through a drive member. Furthermore, a rotating support ring 29 is provided on the inner wall of the purification box 1. The rotating support ring 29 is rotatably connected to the evaporation preparation tank 4 through a bearing. The connection of the rotating support ring 29 can achieve a supporting effect on the evaporation preparation tank 4, wherein the evaporation preparation tank 4 is not a sealed setting.

[0030] When the concentration of the purified dilute sulfuric acid changes greatly, this solution requires multiple cycles to purify the dilute sulfuric acid multiple times to reach the final required concentration of concentrated sulfuric acid.

[0031] Furthermore, the driving member includes a driving gear ring 15 fixedly connected to the outer wall of the evaporation preparation tank 4. The output end of the driving motor 3 extends downward through the cover plate 2 and is fixedly connected to a driving gear 16. The driving gear 16 is meshed with the outer wall of the driving gear ring 15 to realize the rotation of the evaporation preparation tank 4, thereby applying centrifugal force to the sulfuric acid inside.

[0032] The inner wall of the evaporation preparation tank 4 is fixedly connected to an axis column 5, a steam collection cover 6 is provided on the cover plate 2, and a steam extraction pipe 7 is provided on the top of the steam collection cover 6. The steam extraction pipe 7 can be externally connected to a gas purification device to ensure environmentally friendly discharge of steam;

[0033] The steam collection hood 6 is connected to multiple resistive heating plates 8 through a linkage adjustment member. The resistive heating plate 8 is a heating element and a commonly used structure. In this scheme, the heating temperature is maintained at around 150 degrees Celsius. Furthermore, the linkage adjustment member includes an adjustment shaft 17 fixedly connected to the resistive heating plate 8. The adjustment shaft 17 extends upward through the side wall of the steam collection hood 6 and is fixedly connected to an internal gear 18. A control gear ring 19 is rotatably provided on the steam collection hood 6 and is meshed with multiple internal gears 18.

[0034] A further benefit of adopting the above is that, through the setting of the linkage adjustment member, it is possible to simultaneously control multiple adjustment shafts 17 to rotate the resistive heating plate 8, thereby achieving the benefit of adjusting the angle of the resistive heating plate 8, thereby achieving the effect of adjusting the angle of the resistive heating plate 8 according to the centrifugal rotation angle of the sulfuric acid liquid caused by different rotation speeds, so that the resistance of the resistive heating plate 8 to the sulfuric acid liquid during the rotation process is minimized.

[0035] The top of the shaft column 5 is connected to the suction fan blade 9 located in the steam collection cover 6 through a transmission assembly. The steam collection cover 6 is provided with multiple mounting openings. The inner wall of the mounting opening is rotatably connected to the rotating shaft 20 through a connecting bracket. The suction fan blade 9 is set on the rotating shaft 20. Furthermore, the transmission assembly includes a central gear 21 connected to the shaft column 5 through a connecting shaft. The bottom of the rotating shaft 20 is fixedly connected to a transmission gear 22. Multiple transmission gears 22 are meshed with the central gear 21.

[0036] The advantage of adopting the above structure is that, during the rotation of the evaporation preparation tank 4, the suction fan blades 9 are rotated to timely extract the evaporated water vapor and prevent the condensed water vapor from flowing back into the sulfuric acid.

[0037] A liquid exchange rack is provided on one side of the purification box 1, and a hydraulic cylinder 13 is provided on the liquid exchange rack. The end of the hydraulic cylinder 13 passes through the liquid injection tank body 10 and is fixedly connected to a piston disk 14. The liquid injection tank body 10 is provided on the liquid exchange rack. The liquid injection tank body 10 is provided with a return pipe 11 and a liquid inlet pipe 12. The return pipe 11 and the liquid inlet pipe 12 are connected to the evaporation preparation tank 4 through a heat exchange energy-saving component;

[0038] Furthermore, the heat exchange energy-saving component includes multiple liquid return channels opened on the evaporation preparation tank 4, an infusion channel 23 is opened on the axis column 5, and multiple infusion holes 24 connected to the infusion channel 23 are opened on the outer wall of the axis column 5. The liquid return channel is composed of a horizontal opening 25 distributed at the bottom of the evaporation preparation tank 4 and multiple liquid return holes 26 arranged around the evaporation preparation tank 4. Multiple one-way valves 28 are provided on both sides of the liquid injection tank body 10. The return pipe 11 and the liquid inlet pipe 12 are respectively connected to the liquid injection tank body 10 through the one-way valve 28;

[0039] The setting of the one-way valve 28 can realize the collection of concentrated sulfuric acid and the delivery of dilute sulfuric acid, thereby realizing the cyclic purification of concentrated sulfuric acid and significantly improving the preparation efficiency.

[0040] Furthermore, a heat exchange spiral tube 27 is provided at the bottom of the purification box 1. The heat exchange spiral tube 27 consists of a spiral inner tube and a spiral outer tube. One end of the spiral inner tube is connected to the liquid inlet pipe 12, and the other end is connected to the infusion channel 23. One end of the spiral outer tube is connected to the return liquid pipe 11, and the other end is connected to the return liquid channel.

[0041] A further advantage of adopting the above method is that, through the arrangement of the heat exchange spiral tube 27, the incoming liquid enters from the inner tube of sulfuric acid, and the withdrawn liquid is withdrawn from the outer tube of sulfuric acid. In this process, the temperature of concentrated sulfuric acid can be fully utilized to heat the dilute sulfuric acid, effectively reducing the consumption of heat energy and reducing the purification cost.

[0042] It is worth noting that a resistive heating layer is also provided at the bottom of the evaporation preparation tank 4 to effectively heat the sulfuric acid moving from the inside to the outside. The distance from the inside to the outside of the evaporation preparation tank 4 is as wide as possible to ensure that the sulfuric acid is fully heated to evaporate water during the centrifugal transportation process.

[0043] When purifying dilute sulfuric acid, the present invention pre-connects the dilute sulfuric acid input pipe and the concentrated sulfuric acid output pipe to the one-way valve 28 on the injection tank 10. The rotation rate of the drive motor 3 is controlled according to the amount of sulfuric acid in the evaporation preparation tank 4. The drive motor 3 drives the drive gear 16 connected to its output end to rotate, thereby rotating the evaporation preparation tank 4 connected to the drive gear ring 15. During the rotation, the evaporation preparation tank 4 drives the sulfuric acid in it to rotate. During the rotation, the sulfuric acid exhibits centrifugal rotation, which presents a funnel-shaped characteristic, rotating the sulfuric acid in the evaporation preparation tank. The design of the evaporation preparation tank allows the dilute sulfuric acid to enter from the inside and the concentrated sulfuric acid to be discharged from the outside. After entering, the dilute sulfuric acid flows to the outside under the action of centrifugal force. During the flow to the outside, the dilute sulfuric acid is heated and evaporated by the resistive heating plate, achieving a sulfuric acid concentration on the outside greater than that on the inside. Therefore, there is a difference in density between the concentrated sulfuric acid on the outside and the dilute sulfuric acid on the inside, resulting in regional characteristics of sulfuric acid distribution under the action of centrifugal force, resulting in a high concentration of sulfuric acid solution on the outside and a low concentration of sulfuric acid solution on the inside.

[0044] At this time, the resistive heating plate 8 arranged on the inner side will be turned on to heat the low-concentration sulfuric acid solution located on the inner side of the center. Under the action of heating, the low-concentration sulfuric acid solution will heat up, and the water in the low-concentration sulfuric acid solution will evaporate. The evaporated water is discharged outwardly under the action of the steam extraction pipe 7, so that the concentration of the low-concentration sulfuric acid solution located in the central area gradually increases and is transported to the outside under the action of centrifugal force. During the preparation process, the hydraulic cylinder 13 drives the piston disk 14 in the liquid injection tank body 10 to move, so that the low-concentration sulfuric acid solution in the liquid injection tank body 10 is continuously input into the infusion hole 24 through the return liquid pipe 11, and gradually replenishes the low-concentration sulfuric acid solution in the center, and the high-concentration sulfuric acid solution will be discharged through the return liquid hole 26 and the return liquid pipe 11, and discharged into the liquid injection tank body 10 for collection, thereby realizing the purification of sulfuric acid.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for preparing purified sulfuric acid, comprising a purification tank (1), characterized in that: A cover plate (2) is provided above the purification box (1), a driving motor (3) is provided on the cover plate (2), an output end of the driving motor (3) is connected to an evaporation preparation tank (4) via a driving member, an inner wall of the evaporation preparation tank (4) is fixedly connected to an axis column (5), a steam collection hood (6) is provided on the cover plate (2), a steam extraction pipe (7) is provided on the top of the steam collection hood (6), the steam collection hood (6) is connected to a plurality of resistive heating plates (8) via a linkage adjustment member, and the top of the axis column (5) is connected to a suction fan blade (9) located in the steam collection hood (6) via a transmission assembly; A liquid exchange rack is provided on one side of the purification box (1), a liquid injection tank body (10) is provided on the liquid exchange rack, a liquid return pipe (11) and a liquid inlet pipe (12) are provided on the liquid injection tank body (10), the liquid return pipe (11) and the liquid inlet pipe (12) are connected to the evaporation preparation tank (4) through a heat exchange energy-saving component, and a hydraulic cylinder (13) is provided on the liquid exchange rack, the end of the hydraulic cylinder (13) passes through the liquid injection tank body (10) and is fixedly connected to a piston disc (14); The heat exchange energy-saving component includes a plurality of liquid return channels provided on the evaporation preparation tank (4), a liquid infusion channel (23) provided on the axis column (5), and a plurality of liquid infusion holes (24) connected to the liquid infusion channel (23) provided on the outer wall of the axis column (5); The liquid return channel is composed of a horizontal opening (25) distributed at the bottom of the evaporation preparation tank (4) and a plurality of liquid return holes (26) arranged around the evaporation preparation tank (4); A heat exchange spiral tube (27) is provided at the bottom of the purification box (1). The heat exchange spiral tube (27) consists of a spiral inner tube and a spiral outer tube. One end of the spiral inner tube is connected to the liquid inlet tube (12), and the other end is connected to the liquid infusion channel (23). One end of the spiral outer tube is connected to the liquid return tube (11), and the other end is connected to the liquid return channel.

2. A preparation device for purified sulfuric acid according to claim 1, characterized in that, The driving member comprises a driving gear ring (15) fixedly connected to the outer wall of the evaporation preparation tank (4); the output end of the driving motor (3) extends downward through the cover plate (2) and is fixedly connected to a driving gear (16); the driving gear (16) is meshedly connected to the outer wall of the driving gear ring (15).

3. A preparation device for purified sulfuric acid according to claim 1, characterized in that, The linkage adjustment member comprises an adjustment shaft (17) fixedly connected to the resistive heating plate (8), the adjustment shaft (17) extending upward through the side wall of the steam collection hood (6) and fixedly connected to an internal gear (18), and a control gear ring (19) rotatably provided on the steam collection hood (6) and meshingly connected to the plurality of internal gears (18).

4. A preparation device for purified sulfuric acid according to claim 1, characterized in that, The steam collection cover (6) is provided with a plurality of mounting openings, the inner walls of the mounting openings being rotatably connected to a rotating shaft (20) via a connecting bracket, and the suction fan blades (9) are arranged on the rotating shaft (20).

5. A preparation device for purified sulfuric acid according to claim 4, characterized in that, The transmission assembly comprises a central gear (21) connected to the shaft column (5) via a connecting shaft, a transmission gear (22) is fixedly connected to the bottom of the rotating shaft (20), and a plurality of the transmission gears (22) are meshedly connected with the central gear (21).

6. A preparation device for purified sulfuric acid according to claim 1, characterized in that: A plurality of one-way valves (28) are provided on both sides of the liquid injection tank body (10), and the liquid return pipe (11) and the liquid inlet pipe (12) are respectively connected to the liquid injection tank body (10) via the one-way valves (28).

7. The device for preparing purified sulfuric acid according to claim 1, wherein: The inner wall of the purification box (1) is provided with a rotating support ring (29), and the rotating support ring (29) is rotatably connected to the evaporation preparation tank (4) via a bearing.

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