A waste sulfuric acid purification device

Abstract

This invention discloses a waste sulfuric acid purification device, including a cover mechanism. The cover mechanism includes a casing, a casing cover, a solid phase discharge chamber, and a top cover solid phase chamber. A separation mechanism is installed inside the casing, including a rotating drum, a slag outlet, and an overflow outlet. A scraping assembly is provided at the conical end of the rotating drum. The scraping assembly includes a base, a support base, a scraper, and a first spring. This invention utilizes the rotation of the rotating drum to simultaneously eject slag from the slag outlet while the scraper sweeps across the inner walls of the solid phase discharge chamber and the top cover solid phase chamber, removing the slag adhering to them. Each time the scraping assembly rotates to the bottom of the rotating drum, it ejects the scraped slag from the discharge outlet of the solid phase discharge chamber. The scraper maintains elastic contact with the inner wall through the first spring, giving the scraper radial floating capability. This compensates for deviations in the inner wall's shape and position, automatically retracts to prevent jamming when encountering hard deposits, and maintains a constant adhesion force, balancing scraping efficiency with prevention of overload wear.

Description

Technical Field

[0001] This invention relates to the field of waste sulfuric acid treatment technology, specifically to a waste sulfuric acid purification device. Background Technology

[0002] In the sulfuric acid process for producing titanium dioxide, ilmenite is acidified with concentrated sulfuric acid to produce titanium oxysulfate. This process generates a large amount of waste sulfuric acid with a concentration of about 20%, which contains impurities such as ferrous sulfate and metatitanic acid. In actual production, this waste acid is usually first concentrated to a concentration of about 65%-70% through multi-effect evaporation, and then ferrous sulfate is precipitated as a heptahydrate through freeze crystallization to form a crystal slurry suspension. Finally, solid-liquid separation is performed to obtain reusable recycled sulfuric acid and ferrous sulfate byproducts.

[0003] The aforementioned solid-liquid separation process primarily utilizes horizontal screw centrifuges. This equipment leverages the high-speed rotation of the drum to generate a strong centrifugal force field. The dense ferrous sulfate crystals rapidly settle and adhere to the inner wall of the drum, where they are continuously pushed towards the conical end by a screw feeder with a slight speed difference from the drum, achieving continuous, closed-loop solid-liquid separation. The solid filter cake that settles on the inner wall is ejected from the discharge port at the conical end of the drum, while the separated clear liquid phase is discharged from the overflow port at the other end of the drum, completing the separate collection of the solid and liquid phases.

[0004] However, when the solid filter cake, distributed circumferentially from the cone end of the drum, is ejected through the discharge port, it is violently thrown out tangentially with extremely high kinetic energy, impacting the inner wall of the casing. Due to the adhesive nature of the wet filter cake, some solids easily adhere to the casing surface and are difficult to remove on their own. As operating time increases, the adhered material gradually dries and hardens, becoming increasingly firmly bonded to the casing and extremely difficult to remove. The dry, rough surface further exacerbates the adhesion of subsequent wet material, creating a vicious cycle. This not only increases the frequency and labor intensity of equipment cleaning and maintenance but may also affect separation efficiency due to poor unloading and even cause safety hazards such as drum imbalance. Summary of the Invention

[0005] The purpose of this invention is to provide a waste sulfuric acid purification device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste sulfuric acid purification device, comprising a cover mechanism, the cover mechanism comprising a housing, a housing cover rotatably mounted on the top of the housing, a solid phase discharge cavity with an inner arc structure opened at the end of the housing, and the solid phase discharge cavity communicating with the outside of the bottom side of the housing, and an upper cover solid phase cavity with an inner arc structure provided at the end of the housing cover;

[0007] The machine casing is equipped with a separation mechanism capable of solid-liquid separation. The separation mechanism includes a rotating drum rotatably installed inside the machine casing. The drum has several slag outlets circumferentially opened at the conical end, and the slag outlets are located in the solid phase discharge chamber and the solid phase chamber of the upper cover. The drum has several overflow outlets circumferentially opened at the column end.

[0008] The conical end of the drum is provided with a scraping assembly for scraping off solid slag. The scraping assembly includes a base fixed to the cylindrical surface of the drum, a support seat fixed to the top of the base, a scraper sleeved on the top of the support seat, and a plurality of first springs equidistantly installed between the support seat and the scraper. The scraper is slidably connected to the support seat through the first springs.

[0009] Preferably, when the housing cover is fastened to the top of the housing, the solid phase discharge cavity and the upper cover solid phase cavity together form a cylindrical cavity, and the top of the scraper abuts against the inner wall of the solid phase discharge cavity and the upper cover solid phase cavity.

[0010] Preferably, a pair of guide grooves are symmetrically fixed to the inner sidewall of the solid discharge chamber, and a shim strip is fixed inside the guide groove.

[0011] Preferably, both end faces of the scraper are provided with guide components. The guide components include directional grooves and rack grooves formed inside both ends of the scraper. The directional grooves penetrate the end surface of the scraper, and the rack grooves are connected to the directional grooves. A rack is fixed inside the rack grooves.

[0012] Preferably, both ends of the scraper are provided with transmission components that slide inside the directional groove and the rack groove. The transmission components include an anti-rotation slider that is slidably installed inside the directional groove. One end of the anti-rotation slider is fixed to the side of a fixed shaft, and the other end of the fixed shaft is fixed to one end of the inner wall of the cover. Hollow pulleys and solid pulleys are rotatably installed at both ends inside the cover, respectively. The hollow pulleys are sleeved on the fixed shaft, and the hollow pulleys and the solid pulleys are rotatably connected by a transmission belt. A gear is fixed to the side of the hollow pulley, and the gear slides in the rack groove and meshes with the rack.

[0013] Preferably, the scraper's frontal surface is provided with a material guiding assembly for scraping off solid slag from the scraper surface. The material guiding assembly includes a support frame disposed on the frontal surface of the scraper. Multiple sets of material guiding rollers are rotatably disposed at both the upper and lower ends of the support frame. The two ends of the material guiding rollers at the bottom of the support frame are respectively fixedly connected to corresponding solid pulleys. A material guiding belt is wrapped around the outer periphery of the support frame, and the material guiding rollers are rotatably connected to the material guiding belt. Several silicone scraping teeth are fixedly fixed at equal intervals on the surface of the material guiding belt. The silicone scraping teeth abut against the frontal surface of the scraper. A pair of adjustment holes are symmetrically opened at both ends of the support frame. A receiving groove is opened on the side of the support frame near the frontal surface of the scraper. A pressure plate is placed in the receiving groove. The side of the pressure plate near the frontal surface of the scraper abuts against the inner side of the material guiding belt. Sliding rollers are rotatably installed at both ends of the pressure plate, and the sliding rollers are rotatably connected to the inner side of the material guiding belt.

[0014] Preferably, both ends of the scraper are provided with control components for controlling the rotation of the material guiding assembly. The control component includes a vertical groove on the end face of the scraper, a bend groove in the scraper on the side of the vertical groove, a second spring installed inside the scraper at the bottom of the vertical groove, a limit groove on the scraper on the side of the bottom end of the vertical groove, a large slider slidably installed inside the vertical groove, the top end of the second spring installed at the bottom of the large slider, an adjustment cavity inside the large slider, a horizontal sleeve frame fixed on the large slider, the horizontal sleeve frame fixed on the top of the corresponding protective cover, and the end of the pressure plate fixed on the end side of the corresponding horizontal sleeve frame, a pull arm slidably installed inside the horizontal sleeve frame, a slide rod fixed at one end of the pull arm, the slide rod sliding in the adjustment cavity, and the end of the slide rod sliding in the corresponding bend groove, a connecting column fixed at the other end of the pull arm, the connecting column slidably connected in the corresponding adjustment hole, a roller frame fixed outside the horizontal sleeve frame, and rollers on the roller frame sliding in the corresponding guide groove.

[0015] Preferably, the large slider is provided with a locking assembly for locking the large slider. The locking assembly includes a vertical sleeve frame fixed on the large slider. A sliding arm is slidably installed inside the vertical sleeve frame. A pulley is rotatably installed at the outer end of the sliding arm. The pulley slides in a corresponding guide groove and abuts against a shim strip inside the guide groove. A third spring is installed at the inner end of the sliding arm. A toothed plate is fixed at the inner end of the sliding arm. The toothed plate is slidably connected inside the large slider. A gear column is rotatably installed inside the large slider. The gear column meshes with the toothed plate. A lock head is fixed at the end of the gear column and engages in a corresponding limiting groove.

[0016] Preferably, the scraper's upstream surface is provided with a collection assembly for receiving slag. The collection assembly includes a collection basket fixed to the scraper's upstream surface. A pair of side sliding grooves are symmetrically opened at both ends of the collection basket. A push plate is slidably installed inside the collection basket. The top end of a connecting arm is fixed to the bottom surface of the cover. The bottom end of the connecting arm is fixed to both ends of the push plate, and the connection between the push plate and the connecting arm slides in the corresponding side sliding groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. A scraping assembly is installed at the solid material discharge end of the drum, i.e., the conical end. Utilizing the continuous rotation of the drum, while slag is ejected from the discharge port, the scraper sweeps across the inner wall of the cavity formed by the solid discharge chamber and the upper cover solid chamber. This removes slag adhering to the inner walls of the solid discharge chamber and the upper cover solid chamber due to centrifugal force. Each time the scraping assembly rotates to the bottom of the drum, it ejects the scraped slag from the discharge port of the solid discharge chamber. A first spring maintains elastic contact between the scraper and the inner wall of the solid discharge chamber or the upper cover solid chamber, allowing the scraper to have radial floating capability. This effectively compensates for local shape and position deviations caused by long-term use, ensuring scraping effect. It also automatically retracts when encountering hard deposits or local protrusions, preventing the scraper from rigidly jamming or cracking against the inner wall. Simultaneously, it maintains a constant pre-compression force, preventing incomplete scraping due to excessive gaps or abnormal wear and drive overload due to interference fit.

[0019] 2. The scraper's front surface is equipped with a deformable guide component, whose deformation and rolling are controlled by sliding within a specific chute via a transmission and control component: When the roller frame and pulley are not in the guide chute, the large slider is at the bottom of the vertical chute. The pull arm pulls the entire guide component towards the scraper via the connecting column, causing the silicone scraper teeth to adhere tightly to the scraper's front surface. When the slag scraped off the front surface of the scraper falls, it drives the guide belt to roll clockwise. The silicone scraper teeth carry the slag, accelerating slag discharge, reducing slag accumulation, and lowering the scraper's running resistance. After the roller frame and pulley enter the guide chute, the lock releases the large slider, and the large slider and transmission component slide towards the top of the scraper. The slide rod is within the angled groove. The sliding mechanism causes the pull arm to slide out of the horizontal sleeve frame, pushing the material guide assembly through the connecting column. This causes the support frame to tilt with its bottom close to the scraper and its top away from the scraper. As the support frame deforms, the pressure plate detaches from the receiving slot, continuously pulling the material guide belt to ensure that the bottom of the support frame has sufficient silicone scraper teeth that stably contact the scraper's front surface. During the sliding of the transmission assembly, the gear drives the hollow pulley to rotate, thereby driving the silicone scraper teeth to roll. This, in turn, causes the silicone scraper teeth to circulate and sweep across the scraper surface. Combined with the movement of the entire material guide assembly, the rolling silicone scraper teeth not only scrape away the slag adhering to the front surface of the scraper, ensuring the cleanliness of the scraper, but also promptly transport the scraped slag away, preventing slag blockage.

[0020] 3. The scraper front surface is also equipped with a collection component to collect the slag scraped off by the scraper, preventing the slag from falling directly onto the drum surface. When the transmission component slides in the guide component, it can also drive the push plate at the bottom of the collection basket to rise through the connecting arm, thereby pushing out the slag collected inside the collection basket, emptying the slag in time, and facilitating the continued collection of slag in the next cycle. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of the solid phase discharge chamber and the upper cover solid phase chamber of the present invention;

[0023] Figure 3 This is a schematic diagram of the separation mechanism of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a partial cross-sectional schematic diagram of the scraping assembly of the present invention;

[0026] Figure 6 This is a schematic diagram of the guiding component and the control component of the present invention.

[0027] Figure 7 This is a schematic diagram of the internal structure of the components used in this invention.

[0028] Figure 8 This is a schematic diagram of the control component structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the transmission component structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the internal structure of the control component of the present invention;

[0031] Figure 11 This is a schematic diagram showing the disassembly of the pressure plate and storage slot of the present invention;

[0032] Figure 12 This is a schematic diagram of the connection between the horizontal sleeve frame and the pressure plate of the present invention;

[0033] Figure 13 This is a schematic diagram of the guide groove of the present invention;

[0034] Figure 14 This is a schematic diagram showing the coordination of the control component and locking component of the present invention with the guide groove and the shim strip, respectively.

[0035] In the diagram: 1. Cover mechanism; 10. Casing; 11. Casing cover; 12. Solid phase discharge chamber; 13. Upper cover solid phase chamber; 14. Guide groove; 15. Elevating strip; 2. Separation mechanism; 20. Rotary drum; 21. Slag outlet; 22. Overflow outlet; 3. Scraping assembly; 30. Base; 31. Support base; 32. Scraper; 33. First spring; 4. Guide assembly; 40. Orientation groove; 41. Rack groove; 42. Rack; 5. Transmission assembly; 50. Protective cover; 51. Hollow pulley; 52. Solid pulley; 53. Transmission belt; 54. Gear; 55. Fixed shaft; 56. Anti-rotation slider; 6. Guide assembly; 60. Support frame; 61. 62. Guide roller; 63. Guide belt; 64. Silicone scraper teeth; 65. Adjustment hole; 66. Collection groove; 67. Pressure plate; 78. Sliding roller; 79. Control assembly; 70. Vertical groove; 71. Angle groove; 72. Second spring; 73. Limiting groove; 74. Large slider; 75. Adjustment cavity; 76. Sliding rod; 77. Horizontal sleeve frame; 78. Pull arm; 79. Connecting column; 70. Roller frame; 81. Locking assembly; 82. Vertical sleeve frame; 83. Sliding arm; 84. Pulley; 85. Third spring; 86. Toothed plate; 87. Gear column; 88. Lock head; 90. Collection assembly; 91. Collection basket; 92. Side sliding groove; 93. Push plate; 94. Connecting arm. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-14 The present invention provides a technical solution: a waste sulfuric acid purification device;

[0038] Example 1: Please refer to Figure 1 - Figure 2 , Figure 5 - Figure 7 This embodiment describes one of the feasible structures for non-sulfuric acid recovery and purification in the titanium dioxide production process;

[0039] A waste sulfuric acid purification device includes a cover mechanism 1, which includes a housing 10. A housing cover 11 is rotatably installed on the top of the housing 10. A solid phase discharge cavity 12 with an inner arc structure is opened at the end of the housing 10, and the solid phase discharge cavity 12 is connected to the outside of the bottom side of the housing 10. An upper cover solid phase cavity 13 with an inner arc structure is provided at the end of the housing cover 11.

[0040] When the housing cover 11 is fastened to the top of the housing 10, the solid phase discharge chamber 12 and the upper cover solid phase chamber 13 together form a cylindrical cavity, and the top of the scraper 32 abuts against the inner wall of the solid phase discharge chamber 12 and the upper cover solid phase chamber 13.

[0041] The housing 10 is equipped with a separation mechanism 2 capable of solid-liquid separation. The separation mechanism 2 includes a rotating drum 20 rotatably installed inside the housing 10. The drum 20 has several slag outlets 21 circumferentially opened at the conical end, and the slag outlets 21 are located in the solid phase discharge chamber 12 and the upper cover solid phase chamber 13. The drum 20 has several overflow outlets 22 circumferentially opened at the column end.

[0042] In this embodiment, the casing cover 11 on the top of the casing 10 can be rotated and opened to facilitate cleaning of the internal cavity; the drum 20 is roughly shaped with a conical end and a cylindrical end. Both ends of the drum 20 are provided with a discharge port, a slag outlet 21 and an overflow port 22. The frozen crystallized waste sulfuric acid solution is introduced into the drum 20. Through the high-speed rotation of the drum 20, solid and liquid are separated. The clear liquid is discharged from the overflow port 22 at the cylindrical end, and the solid slag is thrown out from the slag outlet 21 at the conical end. The slag is thrown into the cavity formed by the solid phase discharge cavity 12 and the upper cover solid phase cavity 13. Some of the slag is firmly stuck to the surface of the cavity formed by the solid phase discharge cavity 12 and the upper cover solid phase cavity 13 due to centrifugal action.

[0043] The drum 20 is provided with a scraping assembly 3 for scraping off solid slag at the conical end. The scraping assembly 3 includes a base 30 fixed to the cylindrical surface of the drum 20, a support 31 fixed to the top of the base 30, a scraper 32 sleeved on the top of the support 31, and a plurality of first springs 33 equidistantly installed between the support 31 and the scraper 32. The scraper 32 is slidably connected to the support 31 through the first springs 33.

[0044] In this embodiment, a scraping assembly 3 is provided at the conical end of the drum 20. While the drum 20 rotates and throws out the slag, the scraper 32 pushes and scrapes the inner wall of the cylindrical cavity (hereinafter referred to as the cylindrical cavity) formed by the solid discharge cavity 12 and the upper cover solid cavity 13, so that all the adhering slag falls off, effectively preventing adhesion and caking. The scraper 32 and the support base 31 are elastically set by the first spring 33, which can ensure that the scraper 32 is in elastic contact with the inner wall of the solid discharge cavity 12 or the upper cover solid cavity 13, so that the scraper 32 has radial floating ability. This can effectively compensate for the local shape and position deviation of the inner wall caused by long-term use, ensure the scraping effect, and automatically retreat when encountering hard accumulation or local protrusions, avoiding the scraper 32 from rigidly jamming or cracking with the inner wall. At the same time, it maintains a constant pre-pressure adhesion force to prevent incomplete scraping due to excessive gap or abnormal wear and drive overload due to interference jamming.

[0045] Example 2: Please refer to Figure 2 - Figure 14Based on Embodiment 1, this embodiment takes into account that although the scraping assembly 3 rotates synchronously with the drum 20 in Embodiment 1 to remove the slag on the inner wall of the solid discharge chamber 12 and the upper cover solid chamber 13 in a timely manner, a large amount of slag will adhere to the front surface of the scraper 32 under the cyclic rotation scraping. The accumulation of slag will increase the pushing resistance of the scraper 32 and seriously affect the efficiency of slag removal. Therefore, Embodiment 2 solves the problem of slag accumulation on the front surface of the scraper 32 through the following structure.

[0046] A pair of guide grooves 14 are symmetrically fixed on the inner side wall of the solid discharge chamber 12, and a shim strip 15 is fixed inside the guide grooves 14.

[0047] In this embodiment, by Figure 2 and Figure 13 As can be seen, the guide groove 14 has an arc-shaped structure that gradually descends and rises. Inside the guide groove 14, the distance between the pulley 82 and the inner wall of the solid discharge chamber 12 is reduced by the shim strip 15. This allows the pulley 82 to drive the sliding arm 81 to slide into the large slider 74 when it enters the guide groove 14, thereby rotating the gear column 85 and causing the lock head 86 to separate from the limiting groove 73, releasing the lock on the large slider 74. One end of the guide groove 14 is trumpet-shaped, serving as the entry end of the roller frame 791. When the roller frame 791 is not within the range of the guide groove 14, its overall posture is... Figure 3 As shown, the transmission component 5 is located at the bottom end of the rack groove 41, and the material guide component 6 is located vertically against the front surface of the scraper 32. The roller frame 791 enters from the "flare" of the guide groove 14 and continues to slide. The height of the roller frame 791 is low at first and then high, driving the entire transmission component 5, material guide component 6 and control component 7 to slide up and down repeatedly. Thus, the material guide component 6 completes the removal of slag from the front surface of the scraper 32, reducing the accumulation of slag and avoiding the pain point of reduced slag removal effect caused by excessive resistance of the scraper 32.

[0048] The scraper 32 is provided with guide components 4 on both end faces. The guide components 4 include directional grooves 40 and rack grooves 41 opened inside both ends of the scraper 32. The directional grooves 40 penetrate the end surface of the scraper 32, and the rack grooves 41 are connected to the directional grooves 40. A rack 42 is fixed inside the rack grooves 41.

[0049] Both ends of the scraper 32 are provided with transmission components 5 that slide inside the directional groove 40 and the rack groove 41. The transmission components 5 include an anti-rotation slider 56 that slides inside the directional groove 40. One end of the fixed shaft 55 is fixed to the side of the anti-rotation slider 56, and the other end of the fixed shaft 55 is fixed to one end of the inner wall of the cover 50. Hollow pulley 51 and solid pulley 52 are rotatably installed at both ends inside the cover 50, respectively. Hollow pulley 51 is sleeved on the fixed shaft 55. Hollow pulley 51 and solid pulley 52 are rotatably connected by a transmission belt 53. A gear 54 is fixed to the side of the hollow pulley 51. The gear 54 slides in the rack groove 41 and meshes with the rack 42.

[0050] The scraper 32 has a guide assembly 6 on its front surface for scraping off solid slag. The guide assembly 6 includes a support frame 60 on the front surface of the scraper 32. Multiple sets of guide rollers 61 are rotatably mounted at both ends of the support frame 60. The two ends of the guide rollers 61 at the bottom of the support frame 60 are fixedly connected to corresponding solid pulleys 52. A guide belt 62 is wrapped around the outer periphery of the support frame 60, and the guide rollers 61 are rotatably connected to the guide belt 62. The surface of the guide belt 62... A number of silicone scraper teeth 63 are fixed at a distance, and the silicone scraper teeth 63 abut against the front surface of the scraper 32. A pair of adjustment holes 64 are symmetrically opened at both ends of the support frame 60. A collection groove 65 is opened on the side of the support frame 60 near the front surface of the scraper 32. A pressure plate 66 is placed in the collection groove 65. The side of the pressure plate 66 near the front surface of the scraper 32 abuts against the inner side of the guide belt 62. Sliding rollers 67 are rotatably installed at both ends of the pressure plate 66. The sliding rollers 67 are rotatably connected to the inner side of the guide belt 62.

[0051] In this embodiment, as described above, with the guide groove 14 and roller frame 791 cooperating, the transmission assembly 5 is raised and lowered as a whole, causing the anti-rotation slider 56 to slide inside the directional groove 40. The anti-rotation slider 56 has a rectangular structure and is fixedly connected to the protective cover 50, which can prevent the protective cover 50 from rotating. During the raising and lowering process, the gear 54 meshes with the rack 42 in the rack groove 41, causing the gear 54 to drive the hollow pulley 51 to rotate. The hollow pulley 51 drives the solid pulley 52 to rotate through the transmission belt 53, thereby driving the guide roller 61 at the bottom of the support frame 60 to rotate, and then driving the guide belt 62 to roll on the surface of the support frame 60, causing the silicone scraper teeth 63 to move. The silicone scraper teeth 63 abut against the flow-facing surface of the scraper 32. Each silicone scraper tooth 63 circulates across the flow-facing surface of the scraper 32. Combined with the overall lifting and lowering of the guide assembly 6, this efficiently removes and carries away slag, resulting in significant effects. The rack 42 does not cover the bottom of the rack groove 41, ensuring that the gear 54 can rotate freely when the roller frame 791 is not inside the guide groove 14. This means the hollow pulley 51, solid pulley 52, and transmission belt 53 can all rotate freely, as can the guide roller 61 and guide belt 62. During this process, the scraper 32 pushes and scrapes the slag on the inner wall of the cylindrical cavity. The slag on the flow-facing surface of the scraper 32 accumulates and naturally falls off. Figure 4 The silicone scraper teeth 63 on the guide belt 62 that abut against the front surface of the scraper 32 are all bent. This makes the counterclockwise rotation resistance of the guide belt 62 greater than the clockwise rotation resistance. When the slag falls along the front surface of the scraper 32, the bent and closely spaced silicone scraper teeth 63 can both prevent the slag from entering between the scraper 32 and the guide belt 62 and prevent the guide belt 62 from rotating counterclockwise. Therefore, the accumulated slag will fall from the side of the guide belt 62 away from the scraper 32, pushing the silicone scraper teeth 63, thereby driving the guide belt 62 to rotate clockwise. The rotating guide belt 62 and silicone scraper teeth 63 accelerate the slag falling, thereby reducing the accumulation of slag on the front surface of the scraper 32 and reducing the resistance of the scraper 32.

[0052] Both ends of the scraper 32 are provided with control components 7 for controlling the rotation of the guide assembly 6. The control component 7 includes a vertical groove 70 on the end face of the scraper 32, a bend groove 71 in the scraper 32 on the side of the vertical groove 70, a second spring 72 installed inside the scraper 32 at the bottom of the vertical groove 70, a limit groove 73 on the scraper 32 at the bottom side of the vertical groove 70, a large slider 74 slidably installed inside the vertical groove 70, the top of the second spring 72 is installed at the bottom of the large slider 74, an adjustment cavity 75 is provided inside the large slider 74, and a horizontal bar is fixed on the large slider 74. The sleeve frame 77 is fixed to the top of the corresponding protective cover 50, and the end of the pressure plate 66 is fixed to the end side of the corresponding sleeve frame 77. A pull arm 78 is slidably installed inside the sleeve frame 77. A slide rod 76 is fixed to one end of the pull arm 78. The slide rod 76 slides in the adjustment cavity 75, and the end of the slide rod 76 slides in the corresponding angle groove 71. A connecting post 79 is fixed to the other end of the pull arm 78. The connecting post 79 is slidably connected in the corresponding adjustment hole 64. A roller frame 791 is fixed to the outside of the sleeve frame 77, and the rollers on the roller frame 791 slide in the corresponding guide groove 14.

[0053] In this embodiment, the roller frame 791 consists of a block frame and symmetrically arranged rollers. The rollers can rotate freely when they abut against the inner wall of the guide groove 14.

[0054] like Figure 6As shown, at the bottom of the vertical trough 70, the bottom of the angled trough 71 bends to the left. When the large slider 74 is at the bottom of the vertical trough 70, the end of the sliding rod 76, which slides inside the angled trough 71, is pulled to the left by the angled trough 71. The pull arm 78 is tightened by the sliding rod 76, and the pull arm 78 tightens the guide assembly 6 through the connecting column 79, so that the silicone scraper teeth 63 are tightly attached to the front surface of the scraper 32, forming the effect of preventing falling slag from entering between the scraper 32 and the guide belt 62 as mentioned above; when the roller... After the wheel frame 791 enters the guide groove 14, the large slider 74 slides along the vertical groove 70, and the slide rod 76 slides along the angle groove 71. The slide rod 76 moves to the right, causing the pull arm 78 to slide out of the horizontal sleeve frame 77. Through the connecting column 79, it pushes the support frame 60 away from the scraper 32. The support frame 60 rotates around the solid pulley 52, forming an inclined posture where the bottom of the support frame 60 is close to the scraper 32 and the top is away from the scraper 32. This posture relies only on the bottom part of the support frame 60. The silicone scraper teeth 63 contact the front surface of the scraper 32, which greatly reduces the resistance of the silicone scraper teeth 63 contacting the front surface of the scraper 32. When the gear 54 slides in the rack groove 41, the rack 42 can drive the gear 54 to rotate, and finally drive the guide belt 62 to roll. During the rolling process, the silicone scraper teeth 63 at the bottom of the support frame 60, which are in contact with the surface of the scraper 32, scrape off the slag on the front surface of the scraper 32 and transport it out. When the pull arm 78 pushes the guide assembly 6 to rotate through the connecting column 79, the cross sleeve 77 remains stationary, while the pressure plate 66 fixed on the side of the cross sleeve 77 maintains its original posture. That is, the pressure plate 66 pulls the guide belt 62, so that the guide belt 62 at the bottom of the support frame 60 remains in its original state, ensuring that a certain number of silicone scraper teeth 63 contact the front surface of the scraper 32, thereby ensuring the efficiency and effect of the silicone scraper teeth 63 in removing the slag on the front surface of the scraper 32. The sliding rollers 67 at both ends of the pressure plate 66 reduce the rolling resistance of the guide belt 62.

[0055] The large slider 74 is provided with a locking component 8 for locking the large slider 74. The locking component 8 includes a vertical sleeve frame 80 fixed on the large slider 74. A sliding arm 81 is slidably installed inside the vertical sleeve frame 80. A pulley 82 is rotatably installed at the outer end of the sliding arm 81. The pulley 82 slides in the corresponding guide groove 14 and abuts against the padding strip 15 inside the guide groove 14. A third spring 83 is installed at the inner end of the sliding arm 81. A toothed plate 84 is fixed at the inner end of the sliding arm 81. The toothed plate 84 is slidably connected inside the large slider 74. A gear column 85 is rotatably installed inside the large slider 74. The gear column 85 is meshed with the toothed plate 84. A lock head 86 is fixed at the end of the gear column 85 and is engaged in the corresponding limiting groove 73.

[0056] In this embodiment, when the sliding arm 81 enters the guide groove 14 and the pulley 82 abuts against the shim 15, the locking assembly 8 will be activated. While the sliding arm 81 compresses the third spring 83, it drives the toothed plate 84 to move into the large slider 74. The toothed plate 84 drives the gear column 85 to rotate, and the gear column 85 causes the lock head 86 to rotate out of the limiting groove 73, completing the unlocking. Only then can the large slider 74 slide along the vertical groove 70. When the pulley 82 is not abutting against the shim 15, the lock head 86 engages in the limiting groove 73, firmly locking the entire transmission assembly 5 and the control assembly 7, so that the guide assembly 6 will not deform arbitrarily.

[0057] Example 3: Please refer to Figure 3 , Figure 7 Based on Embodiment 1, this embodiment takes into account that when the scraper 32 sweeps across the inner wall of the solid phase cavity 13 of the upper cover in Embodiment 1, some of the slag scraped off by the scraper 32 and the slag conveyed downward by the guide component 6 may fall onto the rotating drum 20. Therefore, it cannot be guaranteed that the scraped slag will be effectively transported to the outlet of the solid phase discharge cavity 12. Therefore, Embodiment 3 solves the problem that some slag falls directly onto the surface of the rotating drum 20 when the scraper 32 pushes and sweeps the slag on the inner wall of the solid phase cavity 13 of the upper cover.

[0058] The scraper 32 is provided with a collection component 9 for receiving slag on its front surface. The collection component 9 includes a collection basket 90 fixed on the front surface of the scraper 32. A pair of side sliding grooves 91 are symmetrically opened at both ends of the collection basket 90. A push plate 92 is slidably installed inside the collection basket 90. The top end of a connecting arm 93 is fixed on the bottom surface of the cover 50. The bottom end of the connecting arm 93 is fixed to both ends of the push plate 92, and the connection between the push plate 92 and the connecting arm 93 slides in the corresponding side sliding groove 91.

[0059] In this embodiment, a collection basket 90 is provided on the front surface of the scraper 32. During the scraping of the inner wall of the solid phase cavity 13 of the upper cover by the scraper 32, the slag falling along the front surface of the scraper 32 enters the inside of the collection basket 90, avoiding the problem of excessive slag accumulation and falling onto the surface of the drum 20. After the roller frame 791 enters the guide groove 14, the large slider 74 drives the protective cover 50 to move, and drives the push plate 92 inside the collection basket 90 to slide through the connecting arm 93, which can push out the slag collected inside the collection basket 90, empty the collection basket 90 in time, and facilitate the continued collection of slag in the next cycle.

[0060] Working principle: When the casing cover 11 is fastened, the external power drives the drum 20 to rotate inside the casing 10. The frozen and crystallized waste sulfuric acid to be separated is continuously transported into the drum 20. Under the action of differential centrifugation, the solid slag moves towards the cone end of the drum 20 and is thrown out from the slag outlet 21, while the liquid sulfuric acid moves towards the column end of the drum 20 and flows out from the overflow outlet 22.

[0061] As the drum 20 rotates, the scraper assembly 3 located at the cone end of the drum 20 rotates synchronously. The scraper 32 circulates and pushes the inner walls of the solid discharge chamber 12 and the upper cover solid chamber 13 to remove the slag adhering to the inner walls of the solid discharge chamber 12 and the upper cover solid chamber 13.

[0062] The support base 31 and the scraper 32 are elastically connected by the first spring 33. During the scraping of slag by the scraper 32, it can ensure that the scraper 32 is in elastic contact with the inner wall of the solid discharge chamber 12 or the solid chamber 13 of the upper cover, ensuring that the scraper 32 is always close to the inner wall of the cylindrical cavity, improving the effect of removing the adhering slag. At the same time, the movable scraper 32 can also effectively overcome obstacles or local protrusions that are difficult to scrape, avoiding violent collision between the scraper 32 and obstacles during high-speed rotation, which would cause wear and damage to the equipment.

[0063] When the roller frame 791 and pulley 82 are not inside the guide groove 14, the locking head 86 engages inside the limiting groove 73, locking the large slider 74 and preventing it from sliding freely. The transmission assembly 5 and the guide assembly 6 remain in place. Figure 3 In the state shown, the support frame 60 is parallel to the scraper 32, and the guide belt 62 is close to the front surface of the scraper 32, so that the silicone scraper teeth 63 are attached to the front surface of the scraper 32.

[0064] In each lap (e.g.) Figure 2 As shown, the drum 20 rotates clockwise. As the scraper 32 removes the slag from the inner wall of the solid discharge chamber 12 and the upper cover solid chamber 13, the slag on the front side of the scraper 32 gradually accumulates. As the angle of the scraper 32 increases, the slag on the front side of the scraper 32 flows down and drives the guide belt 62 to rotate clockwise. The guide belt 62 then accelerates the slag to fall through the silicone scraper teeth 63 and quickly enters the collection basket 90.

[0065] When the scraper assembly 3 rotates to the solid phase discharge chamber 12, and the roller frame 791 and pulley 82 enter the guide groove 14, the pulley 82 is first pushed by the shim bar 15, and the sliding arm 81 slides into the large slider 74. While compressing the third spring 83, it drives the toothed plate 84 to move. The toothed plate 84 drives the gear column 85 to rotate, so that the locking head 86 rotates out of the limiting groove 73, releasing the locking head 86 from the large slider 74.

[0066] Subsequently, guided by the guide groove 14, the roller frame 791 drives the horizontal sleeve frame 77, which in turn drives the large slider 74 to slide towards the top of the scraper 32 in the vertical groove 70. The large slider 74 stretches the second spring 72. At the same time, the slide rod 76, restricted by the angle groove 71, slides towards the support frame 60 until it slides to the other end of the adjustment cavity 75. During the sliding of the slide rod 76, it drives the pull arm 78 to slide in the horizontal sleeve frame 77. The pull arm 78 pushes the support frame 60 to rotate around the solid pulley 52 through the connecting column 79, forming an inclined state in which the bottom of the support frame 60 is close to the front surface of the scraper 32 and the top is far away from the front surface of the scraper 32.

[0067] Since the horizontal sleeve frame 77 is stationary, the pressure plate 66 fixed inside the horizontal sleeve frame 77 will also not move. Therefore, as the support frame 60 gradually tilts, the pressure plate 66 detaches from the storage groove 65, and the pressure plate 66 pulls the guide belt 62 at the bottom of the support frame 60, causing it to deform. This results in the silicone scraper teeth 63 on the surface of the guide belt 62 always contacting the front surface of the scraper 32.

[0068] During the sliding of the large slider 74 toward the top of the scraper 32, the transverse sleeve frame 77, along with the transmission assembly 5, rises synchronously, causing the anti-rotation slider 56 to slide inside the directional groove 40. The gear 54 slides in the rack groove 41, and simultaneously, the rack 42 located inside the rack groove 41 drives the gear 54 to rotate. The gear 54 drives the hollow pulley 51 to rotate, and the hollow pulley 51 drives the solid pulley 52 to rotate via the transmission belt 53. The solid pulley 52 drives the guide roller 61 at the bottom of the support frame 60 to rotate, and the guide roller 61 drives the guide belt 62 to rotate around the support frame. As the guide belt 62 rotates clockwise, it drives the guide roller 61 at the top of the support frame 60 to rotate. At the same time, the sliding rollers 67 at both ends of the pressure plate 66 also rotate synchronously. Several silicone scraper teeth 63 on the surface of the guide belt 62 circulate across the front surface of the scraper 32. Together with the large slider 74 and the transmission component 5, the guide component 6 slides as a whole towards the top of the scraper 32. The rolling silicone scraper teeth 63 not only scrape away the slag adhering to the front surface of the scraper 32, ensuring the cleanliness of the scraper 32, but also transport the scraped slag away in a timely manner, avoiding slag blockage.

[0069] During the sliding of the transmission component 5 to the top of the scraper 32, the pusher 92 is driven to slide towards the opening of the collection basket 90 through the connecting arm 93. The connection between the pusher 92 and the connecting arm 93 slides in the side sliding groove 91, and the pusher 92 pushes out all the slag collected inside the collection basket 90.

[0070] During the sliding of the roller frame 791 and pulley 82 in the guide groove 14, the top of the scraper 32 faces the discharge port at the bottom of the solid discharge chamber 12. When the silicone scraper teeth 63 roll and scrape the front surface of the scraper 32, the scraped material falls off naturally. The slag inside the collection basket 90 pushed by the pusher plate 92 also falls off naturally.

[0071] like Figure 2As shown, after the roller frame 791 and pulley 82 slide to the lowest point of the guide groove 14, they rise until the roller frame 791 and pulley 82 leave the guide groove 14. During this period, the roller frame 791 drives the large slider 74 back to the bottom of the vertical groove 70 through the horizontal sleeve frame 77. The second spring 72 shortens, and the large slider 74 also drives the transmission component 5 to reset. When the large slider 74 reaches the bottom of the vertical groove 70, the slide rod 76 is restricted by the bend groove 71, causing the slide rod 76 to return to the end of the adjustment cavity 75 and pull the pull arm 78 back into the horizontal sleeve frame 77. The pull arm 78 pulls back the support frame 60 through the connecting column 79, and the guide component 6 returns to the initial state. Then the entire device performs the next cycle.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste sulfuric acid purification device, comprising a cover mechanism (1), wherein the cover mechanism (1) includes a housing (10), and a housing cover (11) is rotatably mounted on the top of the housing (10), characterized in that: The end of the housing (10) is provided with a solid discharge cavity (12) with an inner wall of arc structure, and the solid discharge cavity (12) is connected to the outside of the bottom side of the housing (10). The end of the housing cover (11) is provided with an upper cover solid cavity (13) with an inner wall of arc structure. The housing (10) is equipped with a separation mechanism (2) capable of solid-liquid separation. The separation mechanism (2) includes a rotating drum (20) rotatably installed inside the housing (10). The drum (20) has several slag outlets (21) circumferentially opened at the conical end, and the slag outlets (21) are located in the solid phase discharge chamber (12) and the upper cover solid phase chamber (13). The drum (20) has several overflow outlets (22) circumferentially opened at the column end. The conical end of the drum (20) is provided with a scraping assembly (3) for scraping off solid slag. The scraping assembly (3) includes a base (30) fixed to the cylindrical surface of the drum (20). A support seat (31) is fixed on the top of the base (30). A scraper (32) is sleeved on the top of the support seat (31). A plurality of first springs (33) are installed at equal intervals between the support seat (31) and the scraper (32). The scraper (32) is slidably connected to the support seat (31) through the first springs (33).

2. The waste sulfuric acid purification equipment according to claim 1, characterized in that: When the housing cover (11) is fastened to the top of the housing (10), the solid phase discharge cavity (12) and the upper cover solid phase cavity (13) together form a cylindrical cavity, and the top of the scraper (32) abuts against the inner wall of the solid phase discharge cavity (12) and the upper cover solid phase cavity (13).

3. The waste sulfuric acid purification equipment according to claim 2, characterized in that: A pair of guide grooves (14) are symmetrically fixed on the inner sidewall of the solid discharge chamber (12), and a shim strip (15) is fixed inside the guide groove (14).

4. The waste sulfuric acid purification equipment according to claim 3, characterized in that: The scraper (32) is provided with guide components (4) on both end faces. The guide components (4) include directional grooves (40) and rack grooves (41) opened inside both ends of the scraper (32). The directional grooves (40) penetrate the end surface of the scraper (32), and the rack grooves (41) are connected to the directional grooves (40). A rack (42) is fixed inside the rack grooves (41).

5. The waste sulfuric acid purification equipment according to claim 4, characterized in that: Both ends of the scraper (32) are provided with a transmission assembly (5) that slides inside the directional groove (40) and the rack groove (41). The transmission assembly (5) includes an anti-rotation slider (56) that slides inside the directional groove (40). One end of a fixed shaft (55) is fixed to the side of the anti-rotation slider (56), and the other end of the fixed shaft (55) is fixed to one end of the inner wall of the cover (50). Hollow pulleys (51) and solid pulleys (52) are rotatably installed at both ends inside the cover (50). The hollow pulleys (51) are sleeved on the fixed shaft (55), and the hollow pulleys (51) and the solid pulleys (52) are rotatably connected by a transmission belt (53). A gear (54) is fixed to the side of the hollow pulleys (51), and the gear (54) slides inside the rack groove (41) and meshes with the rack (42).

6. The waste sulfuric acid purification equipment according to claim 5, characterized in that: The scraper (32) is provided with a material guiding assembly (6) for scraping off solid slag from the surface of the scraper (32). The material guiding assembly (6) includes a support frame (60) provided on the surface of the scraper (32). Multiple sets of material guiding rollers (61) are rotatably arranged at both the upper and lower ends of the support frame (60). The two ends of the material guiding rollers (61) at the bottom of the support frame (60) are respectively fixedly connected to corresponding solid pulleys (52). The support frame (60) is wrapped with a material guiding belt (62), and the material guiding rollers (61) are rotatably connected to the material guiding belt (62). The surface of the material guiding belt (62) is equidistant. A number of silicone scraper teeth (63) are fixed, and the silicone scraper teeth (63) abut against the flow-facing surface of the scraper (32). A pair of adjustment holes (64) are symmetrically opened at both ends of the support frame (60). A collection groove (65) is opened on the side of the support frame (60) near the flow-facing surface of the scraper (32). A pressure plate (66) is placed in the collection groove (65). The side of the pressure plate (66) near the flow-facing surface of the scraper (32) abuts against the inner side of the guide belt (62). Sliding rollers (67) are rotatably installed at both ends of the pressure plate (66). The sliding rollers (67) are rotatably connected to the inner side of the guide belt (62).

7. The waste sulfuric acid purification equipment according to claim 6, characterized in that: Both ends of the scraper (32) are provided with control components (7) for controlling the rotation of the guide assembly (6). The control component (7) includes a vertical groove (70) opened on the end face of the scraper (32). A bend groove (71) is opened in the scraper (32) on the side of the vertical groove (70). A second spring (72) is installed inside the scraper (32) at the bottom of the vertical groove (70). A limit groove (73) is opened on the scraper (32) on the side of the bottom end of the vertical groove (70). A large slider (74) is slidably installed inside the vertical groove (70). The top end of the second spring (72) is installed at the bottom of the large slider (74). An adjustment cavity (75) is opened inside the large slider (74). The large slider (74) is fixed on... A horizontal sleeve frame (77) is fixed to the top of the corresponding protective cover (50), and the end of the pressure plate (66) is fixed to the end side of the corresponding horizontal sleeve frame (77). A pull arm (78) is slidably installed inside the horizontal sleeve frame (77). A slide rod (76) is fixed to one end of the pull arm (78). The slide rod (76) slides in the adjustment cavity (75), and the end of the slide rod (76) slides in the corresponding angle groove (71). A connecting column (79) is fixed to the other end of the pull arm (78). The connecting column (79) is slidably connected in the corresponding adjustment hole (64). A roller frame (791) is fixed to the outside of the horizontal sleeve frame (77), and the rollers on the roller frame (791) slide in the corresponding guide groove (14).

8. The waste sulfuric acid purification equipment according to claim 7, characterized in that: The large slider (74) is provided with a locking assembly (8) for locking the large slider (74). The locking assembly (8) includes a vertical sleeve frame (80) fixed on the large slider (74). A sliding arm (81) is slidably installed inside the vertical sleeve frame (80). A pulley (82) is rotatably installed at the outer end of the sliding arm (81). The pulley (82) slides in the corresponding guide groove (14) and the pulley (82) abuts against the pad strip (15) inside the guide groove (14). A third spring (83) is installed at the inner end of the sliding arm (81). A toothed plate (84) is fixed at the inner end of the sliding arm (81). The toothed plate (84) is slidably connected to the inside of the large slider (74). A gear column (85) is rotatably installed inside the large slider (74). The gear column (85) meshes with the toothed plate (84). A lock head (86) is fixed at the end of the gear column (85), and the lock head (86) is engaged in the corresponding limiting groove (73).

9. The waste sulfuric acid purification equipment according to claim 5, characterized in that: The scraper (32) is provided with a collection component (9) for receiving slag on its front surface. The collection component (9) includes a collection basket (90) fixed on the front surface of the scraper (32). A pair of side sliding grooves (91) are symmetrically opened at both ends of the collection basket (90). A push plate (92) is slidably installed inside the collection basket (90). The bottom surface of the cover (50) is fixed with the top end of a connecting arm (93). The bottom end of the connecting arm (93) is fixed to both ends of the push plate (92), and the connection between the push plate (92) and the connecting arm (93) slides in the corresponding side sliding groove (91).

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