Continuous sedimentation equipment for titanium dioxide production

Abstract

The invention relates to the technical field of wastewater treatment, and discloses titanium dioxide production continuous sedimentation equipment which comprises two supporting frames, a groove body is fixedly connected between one sides of the two supporting frames, a fixing frame is fixedly connected to the upper portions of the supporting frames, and a first discharging bin and a second discharging bin are fixedly installed on the upper portion of the fixing frame. A settling tank body is fixedly connected to the inner wall of the tank body, the bottoms of the tank body and the settling tank body are conical, a flocculation cylinder is arranged in the center of the interior of the settling tank body, a plurality of groups of one-way drainage holes are uniformly formed in the outer wall of the flocculation cylinder, and an extruding and spraying assembly for extruding and spraying out a flocculating agent is arranged in the flocculation cylinder; a flocculating agent is synchronously ejected out from a plurality of one-way liquid discharge holes through high-pressure injection by virtue of the extruding and spraying assembly, so that no dead angle exists in the settling tank body, the flocculating agent is prevented from agglomerating to form jelly and blocking a pipeline or an outlet of the settling tank body, and meanwhile, the condition of poor titaniferous solution treatment effect caused by non-uniform reaction of the flocculating agent and titaniferous solution is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and particularly relates to a continuous sedimentation device for titanium dioxide production. Background Art

[0002] After the titanium dioxide base material undergoes the processes of filtration, washing, pressing, and drying by a filter press, some titanium dioxide will remain in the washing water, resulting in waste of titanium dioxide. In order to improve the utilization rate of titanium dioxide and economic benefits, a titanium dioxide wastewater sedimentation device is often used to recover titanium dioxide.

[0003] The continuous sedimentation device for titanium dioxide production is an integrated and continuous solid-liquid separation device. Through the synergistic effect of physical sedimentation and chemical flocculation, efficient separation of titanium liquid (including titanium hydrolysis mother liquor) and solid impurities (such as unhydrolyzed particles, silicate aluminates, iron oxides, etc.) in the titanium dioxide production process is achieved. Its core function is to ensure the purity of titanium liquid, reduce the interference of impurities in subsequent processes (such as hydrolysis and calcination), and at the same time reduce the impact of wastewater discharge on the environment.

[0004] During the sedimentation process of titanium dioxide, a flocculant needs to be added to separate titanium dioxide particles from the solution, remove impurities, and improve the sedimentation efficiency and effect. However, before the flocculant is added to the sedimentation tank body, it is easy to agglomerate and form a gel-like substance, and there are significant differences in the overall concentration of the flocculant that forms the gel-like substance, seriously affecting the sedimentation efficiency and product quality.

[0005] Therefore, the present invention provides a continuous sedimentation device for titanium dioxide production. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A continuous sedimentation device for titanium dioxide production according to the present invention includes two support frames, a tank body is fixedly connected between the two support frames, a fixed frame is fixedly connected above the support frames, a first feeding bin and a second feeding bin are respectively fixedly installed above the fixed frame, a sedimentation tank body is fixedly connected to the inner wall of the tank body, the bottoms of the tank body and the sedimentation tank body are both conical in shape, a flocculation cylinder is arranged at the central position inside the sedimentation tank body, a plurality of groups of one-way drainage holes are evenly arranged on the outer wall of the flocculation cylinder, the bottom outlet of the first feeding bin is located directly above the sedimentation tank body, the bottom outlet of the second feeding bin is located directly above the flocculation cylinder, an extrusion and spraying component for extruding and spraying the flocculant is arranged inside the flocculation cylinder, and an inner stirring component and an outer stirring component are respectively arranged inside and outside the flocculation cylinder.

[0008] Preferably, a plurality of openings are evenly arranged on both sides of the sedimentation tank body, filter cloths are arranged at the plurality of openings, overflow tanks are fixedly connected to both sides of the tank body, a plurality of absorbent cottons are arranged on the inner wall of the flocculation cylinder, the absorbent cottons are made of activated carbon fibers, and one sides of the plurality of absorbent cottons are respectively attached to one sides of multiple groups of unidirectional liquid discharge holes.

[0009] Preferably, the extrusion and spraying assembly includes a servo motor, a rotating shaft is fixedly connected to the output shaft of the servo motor, the rotating shaft is rotationally connected to the inner wall of the flocculation cylinder, an arc-shaped outer plate is fixedly connected to the outer wall of the rotating shaft, the arc-shaped outer plate is located inside the flocculation cylinder, a hinge seat is fixedly connected to one end of the arc-shaped outer plate, and an arc-shaped extrusion plate is fixedly connected to the shaft rod of the hinge seat.

[0010] Preferably, the inner stirring assembly includes a first rotating rod, the first rotating rod is rotationally connected to the inner wall of the arc-shaped outer plate, a first stirring blade is fixedly connected to the outer wall of the first rotating rod, and a self-rotation assembly for driving the first rotating rod to rotate self is arranged above the first rotating rod.

[0011] Preferably, a collar plate is fixedly connected to the top of the sedimentation tank body, the servo motor is fixedly installed on the top of the collar plate, the bottom of the collar plate is rotationally connected to the outer wall of the flocculation cylinder, the self-rotation assembly includes a first gear, the first gear is fixedly connected to the top of the first rotating rod, the teeth of the first gear are engaged with an external gear ring, and a plurality of inner sliders are slidably connected to the inner wall of the external gear ring, and the inner sliders are all fixedly connected to one side of the rotating shaft.

[0012] Preferably, a clamping plate is fixedly connected to the inner wall of the flocculation cylinder, and the clamping plate abuts against the side surface of the arc-shaped extrusion plate.

[0013] Preferably, the outer stirring assembly includes a plurality of second stirring blades, one ends of the second stirring blades are all fixedly connected to the outer wall of the flocculation cylinder, the other ends of the second stirring blades are all fixedly connected to a second gear, the teeth of the second gear are engaged with a side gear ring, and the side gear ring is fixedly connected to the bottom of the collar plate.

[0014] Preferably, a plurality of telescopic rods are fixedly connected to one side of the arc-shaped extrusion plate, one ends of the telescopic rods far away from the arc-shaped extrusion plate are fixedly connected to the outer wall of the arc-shaped outer plate, a protective spring is arranged outside the telescopic rods, and both ends of the protective spring are fixedly connected to one side of the arc-shaped extrusion plate and the outer wall of the arc-shaped outer plate.

[0015] Preferably, a filter plate is fixedly connected to the inner bottom end of the sedimentation tank body, an electric vibration block is fixedly installed at the bottom of the filter plate, a gathering plate is fixedly connected to the upper surface of the filter plate, the filter plate is in an inverted "V" shape, discharge bins are fixedly connected to both sides of the upper surface of the filter plate, a discharge pipe is fixedly communicated with one end of the discharge bin, a pumping pump is arranged outside the discharge pipe, torsion spring shaft seats are fixedly connected to both sides of the discharge bin, and protective doors are fixedly connected to the shaft rods of the torsion spring shaft seats.

[0016] Preferably, a drain pipe is fixedly connected to the bottom of the tank body. A plurality of inlet holes are provided at one end of the drain pipe located inside the sedimentation tank body, and an electric valve is arranged outside the drain pipe.

[0017] The beneficial effects of the present invention are as follows: 1. For the continuous sedimentation equipment for titanium dioxide production of the present invention, the flocculant is synchronously ejected from a plurality of one-way liquid discharge holes through high-pressure spraying by the extrusion and spraying assembly, ensuring no dead corners in the sedimentation tank body, preventing the flocculant from agglomerating to form a "gel-like substance", blocking the pipeline or the outlet of the sedimentation tank body, and at the same time avoiding the situation of poor treatment effect of titanium liquid due to uneven reaction between the flocculant and the titanium liquid.

[0018] 2. For the continuous sedimentation equipment for titanium dioxide production of the present invention, through the internal stirring assembly, the dissolution and preliminary mixing of the flocculant are promoted, the dissolution of the flocculant is accelerated, and a uniform flocculant solution is formed, avoiding the agglomeration of the flocculant and being unable to be evenly dispersed inside the sedimentation tank body; through the external stirring assembly, the flocculant is fully mixed with the titanium liquid inside the sedimentation tank body, improving the reaction efficiency and the sedimentation quality of the flocs. Description of the Drawings

[0019] The present invention will be further described below with reference to the drawings.

[0020] Figure 1 is the overall three-dimensional view of the present invention; Figure 2 is the schematic structural view of the tank body in the present invention; Figure 3 is the schematic structural view at the sedimentation tank body in the present invention; Figure 4 is the schematic structural view at the side tooth ring in the present invention; Figure 5 is the schematic structural view at the one-way liquid discharge hole in the present invention; Figure 6 is the schematic structural view of the flocculation cylinder in the present invention; Figure 7 is the schematic structural view of the arc-shaped outer plate in the present invention; Figure 8 is the schematic structural view of the outer tooth ring in the present invention; Figure 9 is the schematic structural view of the arc-shaped extrusion plate in the present invention; Figure 10 is the schematic structural view of the filter plate in the present invention.

[0021] In the figure: 1, support frame; 2, trough body; 3, sedimentation trough body; 4, fixing frame; 5, first blanking bin; 6, second blanking bin; 7, overflow trough; 8, filter cloth; 9, flocculation cylinder; 10, one-way liquid discharge hole; 11, absorbent cotton; 12, rotating shaft; 13, arc-shaped outer plate; 14, hinge seat; 15, arc-shaped extrusion plate; 16, clamping plate; 17, telescopic rod; 18, protective spring; 19, inner slider; 20, outer gear ring; 21, first gear; 22, first rotating rod; 23, first stirring blade; 24, servo motor; 25, collar plate; 26, second stirring blade; 27, second gear; 28, side gear ring; 29, filter plate; 30, gathering plate; 31, discharge bin; 32, discharge pipe; 33, pumping pump; 34, protective door; 35, torsion spring shaft seat; 36, electric vibration block; 37, drain pipe; 38, electric valve. Detailed implementation manner

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0023] As Figures 1 to 10 shown, the present invention provides a technical solution: a continuous sedimentation device for titanium dioxide production, including two support frames 1, a trough body 2 is fixedly connected between the two support frames 1, a fixing frame 4 is fixedly connected above the support frame 1, a first blanking bin 5 and a second blanking bin 6 are respectively fixedly installed above the fixing frame 4, a sedimentation trough body 3 is fixedly connected to the inner wall of the trough body 2, the bottoms of the trough body 2 and the sedimentation trough body 3 are both conical in shape, a flocculation cylinder 9 is arranged at the central position inside the sedimentation trough body 3, a plurality of groups of one-way liquid discharge holes 10 are evenly arranged on the outer wall of the flocculation cylinder 9, the bottom outlet of the first blanking bin 5 is located directly above the sedimentation trough body 3, the bottom outlet of the second blanking bin 6 is located directly above the flocculation cylinder 9, an extrusion and spraying assembly for extruding and spraying the flocculant is arranged inside the flocculation cylinder 9, and an inner stirring assembly and an outer stirring assembly are respectively arranged inside and outside the flocculation cylinder 9.

[0024] During operation: The support frame 1 forms the main frame of the equipment, providing overall stability to ensure that the tank body 2 has no vibration or deviation during continuous operation. The titanium dioxide waste liquid is added from the top of the first feeding bin 5, and the titanium liquid will flow into the inside of the sedimentation tank body 3 from the bottom outlet of the first feeding bin 5 to ensure that the titanium liquid is accurately placed inside the sedimentation tank body 3. The prepared flocculant is added from the top of the second feeding bin 6, and the flocculant will enter the inside of the flocculation cylinder 9 from the bottom outlet of the second feeding bin 6; when the liquid level inside the tank body 2 reaches the predetermined liquid level, the extrusion and spraying assembly is started to work. The extrusion and spraying assembly will spray the flocculant inside the flocculation cylinder 9 from each one-way drainage hole 10, so that each area inside the sedimentation tank body 3 is ingested with the flocculant, ensuring that the flocculant quickly diffuses to each area of the sedimentation tank body 3 and reacts with the colloidal particles in the titanium liquid, avoiding uneven local concentration. And when the extrusion and spraying assembly is working, it will first drive the internal stirring assembly inside the flocculation cylinder 9 to move. The internal stirring assembly promotes the dissolution and preliminary mixing of the flocculant through rotation and stirring, accelerates the dissolution of the flocculant, and forms a uniform flocculant solution to avoid the agglomeration of the flocculant in the flocculation cylinder 9. After the flocculant is ingested into each area inside the tank body 2, when the extrusion and spraying assembly continues to move, the flocculant feeding work will not be carried out at this time, but the entire flocculation cylinder 9 will be rotated. When the flocculation cylinder 9 rotates, it will drive the external stirring assembly to move. When the flocculation cylinder 9 rotates, the external stirring assembly rotates synchronously, and a low-speed circulation is formed inside the sedimentation tank body 3 to maintain the uniformity of the mixing of the flocculant and the titanium liquid, and at the same time avoid the breakage of the flocs due to sudden changes in the flow field. Under the synergistic action of the rotation of the flocculation cylinder 9 and the external stirring assembly, the floc particle size quickly settles to the bottom conical area of the sedimentation tank body 3 under the action of gravity; Through the above embodiments, the extrusion and spraying assembly synchronously shoots out the flocculant from multiple one-way drainage holes 10 through high-pressure spraying, ensuring that there are no dead corners inside the sedimentation tank body 3, preventing the agglomeration of the flocculant to form a "gel-like substance" and blocking the pipeline or the outlet of the sedimentation tank body 3, and at the same time avoiding the poor treatment effect of the titanium liquid caused by uneven reaction of the flocculant and the titanium liquid; through the internal stirring assembly, the dissolution and preliminary mixing of the flocculant are promoted, the dissolution of the flocculant is accelerated, and a uniform flocculant solution is formed to avoid the agglomeration of the flocculant and its inability to be evenly dispersed inside the sedimentation tank body 3; through the external stirring assembly, the flocculant is fully mixed with the titanium liquid inside the sedimentation tank body 3, improving the reaction efficiency and the sedimentation quality of the flocs.

[0025] As Figures 2 to 3 shown, a plurality of openings are evenly arranged on both sides of the sedimentation tank body 3, filter cloths 8 are arranged at the plurality of openings, overflow tanks 7 are fixedly connected to both sides of the tank body 2, and a plurality of absorbent cotton 11 are arranged on the inner wall of the flocculation cylinder 9. The absorbent cotton 11 is made of activated carbon fiber, and one side of the plurality of absorbent cotton 11 is respectively attached to one side of a plurality of groups of one-way drainage holes 10.

[0026] During operation: In a continuous sedimentation device, the filter cloth 8 can block the colloidal particles in the titanium liquid from passing through, keeping them in the sedimentation tank body 3 all the time to react with the flocculant. The titanium clear liquid then passes through the filter cloth 8 and enters the tank body 2. During the reaction process, the titanium liquid is continuously added to the tank body 2, and the reacted titanium clear liquid continuously flows out from the overflow tank 7. The floc particles continuously settle in the sedimentation tank body 3. At the same time, after adding the flocculant liquid into the flocculation cylinder 9, the absorption cotton 11 made of activated carbon fiber inside it will absorb a part of the flocculant. When the extrusion and spraying assembly extrudes the absorption cotton 11, the absorption cotton 11 will release the flocculant to each area inside the sedimentation tank body 3 through the one-way drainage holes 10 with one-way characteristics to prevent the titanium liquid from entering the flocculation cylinder 9. The filter cloth 8 effectively blocks the colloidal particles in the titanium liquid from passing through, keeping them continuously in the sedimentation tank body 3 to fully react with the flocculant, ensuring sufficient contact reaction time between the colloidal particles and the flocculant, greatly improving the flocculation reaction efficiency of the colloidal particles, helping to form larger and more stable flocs, facilitating subsequent separation and treatment. And the flocculant is accurately released to each area inside the sedimentation tank body 3 through the one-way drainage holes 10 with one-way characteristics, ensuring the reaction uniformity and high efficiency.

[0027] As Figures 3 to 6 shown, the extrusion and spraying assembly includes a servo motor 24. The output shaft of the servo motor 24 is fixedly connected with a rotating shaft 12. The rotating shaft 12 is rotationally connected with the inner wall of the flocculation cylinder 9. An arc-shaped outer plate 13 is fixedly connected to the outer wall of the rotating shaft 12. The arc-shaped outer plate 13 is located inside the flocculation cylinder 9. One end of the arc-shaped outer plate 13 is fixedly connected with a hinge seat 14. The shaft rod of the hinge seat 14 is fixedly connected with an arc-shaped extrusion plate 15.

[0028] During operation: If it is necessary to add flocculant into the sedimentation tank body 3, start the servo motor 24. Its output shaft drives the rotating shaft 12 to rotate self - sufficiently. The rotating shaft 12 drives the arc-shaped outer plate 13 to rotate with its own axis as the center. When the rotating shaft 12 rotates one circle, the arc-shaped extrusion plate 15 will successively pass through each absorption cotton 11 and squeeze them to make them compress and deform. The deformed absorption cotton 11 will discharge the absorbed flocculant inside through the one-way drainage holes 10 in a spraying posture into the sedimentation tank body 3 to react with the colloids in the titanium liquid. After the extrusion is completed, the absorption cotton 11 will quickly absorb the remaining flocculant in the flocculation cylinder 9. In this way, every time the flocculation cylinder 9 is in a static state, when the rotating shaft 12 rotates one circle, it can achieve the rapid and accurate spraying of the flocculant. The flocculant is evenly dispersed into each area inside the sedimentation tank body 3 in a spraying posture, can fully contact the colloidal particles in the titanium liquid, expand the reaction interface, significantly improve the efficiency and thoroughness of the flocculation reaction, effectively accelerate the aggregation and sedimentation of the colloidal particles, and improve the sedimentation and separation effect.

[0029] As Figures 6 to 7As shown in the figure, the inner stirring assembly includes a first rotating rod 22, which is rotatably connected to the inner wall of the arc-shaped outer plate 13. A first stirring blade 23 is fixedly connected to the outer wall of the first rotating rod 22. Above the first rotating rod 22, there is a self-rotating assembly that drives the first rotating rod 22 to rotate self.

[0030] During operation: When the arc-shaped outer plate 13 rotates one circle inside the flocculation cylinder 9, the first rotating rod 22 and the first stirring blade 23 rotate to various areas inside the flocculation cylinder 9 accordingly. During this period, under the synergistic action of the self-rotating assembly, the first rotating rod 22 and the first stirring blade 23 rotate self. Through this self-rotating movement, the flocculant solution in the flocculation cylinder 9 is evenly mixed, effectively avoiding the precipitation and agglomeration of the flocculant in the flocculation cylinder 9, ensuring that it can be evenly absorbed into the absorption cotton 11. The evenly mixed flocculant solution can make the flocculant molecules fully dispersed in the solution, more effectively play the flocculation role, improve the flocculation efficiency and quality, make the subsequent sedimentation and separation more thorough, and reduce residual impurities.

[0031] As Figures 6 to 8 shown in the figure, a collar plate 25 is fixedly connected to the top of the sedimentation tank body 3. The servo motor 24 is fixedly installed on the top of the collar plate 25. The bottom of the collar plate 25 is rotatably connected to the outer wall of the flocculation cylinder 9. The self-rotating assembly includes a first gear 21, which is fixedly connected to the top of the first rotating rod 22. The teeth of the first gear 21 mesh with an external tooth ring 20. A plurality of inner sliders 19 are slidably connected to the inner wall of the external tooth ring 20, and the inner sliders 19 are all fixedly connected to one side of the rotating shaft 12.

[0032] During operation: The arc-shaped outer plate 13 rotates, driving the first rotating rod 22 and the first gear 21 to move in various areas inside the flocculation cylinder 9. Since the first gear 21 and the external tooth ring 20 are always meshed, the first rotating rod 22 rotates self accordingly, and then the first stirring blade 23 rotates, fully stirring the flocculant at various positions inside the flocculation cylinder 9.

[0033] As Figure 6 、 Figure 7 and Figure 9 shown in the figure, a positioning plate 16 is fixedly connected to the inner wall of the flocculation cylinder 9, and the side surface of the positioning plate 16 abuts against the side surface of the arc-shaped pressing plate 15.

[0034] During operation: When the equipment is running, the arc-shaped outer plate 13 drives the arc-shaped pressing plate 15 to rotate one circle. After each absorption cotton 11 is squeezed to discharge the internal flocculant, the arc-shaped pressing plate 15 rotates to the position of the positioning plate 16, and its side surface contacts the wall surface of the positioning plate 16. Due to the obstruction of the positioning plate 16, when the rotating shaft 12 continues to rotate, the hinge seat 14 will drive the flocculation cylinder 9 to rotate self against the rotation resistance. At this time, the flocculant has been added to the titanium liquid in the sedimentation tank body 3. The self-rotation of the flocculation cylinder 9 will drive the outer stirring assembly arranged outside it to work. Through the stirring action of the outer stirring assembly, the flocculant and the titanium liquid are fully mixed and reacted, accelerating the formation of the colloid and the subsequent sedimentation and separation process.

[0035] As Figures 3 to 4 shown, the outer stirring assembly includes a plurality of second stirring blades 26. One ends of the second stirring blades 26 are fixedly connected to the outer wall of the flocculation cylinder 9, and gear wheels 27 are fixedly connected to the other ends of the second stirring blades 26. The teeth of the gear wheels 27 are meshed with a side gear ring 28, and the side gear ring 28 is fixedly connected to the bottom of the collar plate 25.

[0036] During operation: The rotation of the flocculation cylinder 9 drives the second stirring blades 26 to revolve in the sedimentation tank body 3. At the same time, the gear wheels 27 and the side gear ring 28 are meshed and rotated, so that the second stirring blades 26 rotate self - rotatively during the revolution process. The self - rotating second stirring blades 26 can evenly stir the flocculant and the titanium liquid in the sedimentation tank body 3, promoting the full reaction between the two. The revolution enables the second stirring blades 26 to cover a larger range in the sedimentation tank body 3, initially mixing the flocculant and the titanium liquid; the self - rotation further refines the stirring action, enabling the full exchange and fusion of the materials in different regions, breaking the possible concentration gradient and stratification phenomenon, greatly strengthening the mixing effect, and significantly improving the reaction efficiency of the flocculant and the titanium liquid.

[0037] As Figure 6 、 Figure 7 and Figure 9 shown, a plurality of telescopic rods 17 are fixedly connected to one side of the arc - shaped extrusion plate 15. The ends of the telescopic rods 17 far away from the arc - shaped extrusion plate 15 are fixedly connected to the outer wall of the arc - shaped outer plate 13. A protective spring 18 is arranged outside the telescopic rods 17, and both ends of the protective spring 18 are fixedly connected to one side of the arc - shaped extrusion plate 15 and the outer wall of the arc - shaped outer plate 13.

[0038] During operation: The arc - shaped extrusion plate 15 abuts against the clamping plate 16, prompting the flocculation cylinder 9 to rotate self - rotatively. Through the outer stirring assembly, the flocculant and the titanium liquid fully react and the colloid particles settle. After that, titanium liquid is continuously added into the sedimentation tank body 3. At this time, the telescopic rods 17 are controlled to contract, driving the arc - shaped extrusion plate 15 to rotate hingedly around the inner wall of the hinge seat 14, so that it gets out of the abutting state with the clamping plate 16. In this way, when the rotating shaft 12 continues to rotate, the arc - shaped outer plate 13 can drive the arc - shaped extrusion plate 15 to smoothly pass through the position of the clamping plate 16. After the arc - shaped extrusion plate 15 gets out of the abutting state with the clamping plate 16, the telescopic rods 17 resume the contracted state, and the arc - shaped outer plate 13 continues to rotate and squeeze the absorbent cotton 11, discharging the flocculant into the sedimentation tank body 3 again to react with the newly added titanium liquid, thereby realizing the continuous intermittent intake of the flocculant and achieving the continuity of the sedimentation setting. During this process, the protective spring 18 can enhance the stability of the telescopic rods 17 during contraction, ensuring the stable operation of the equipment.

[0039] As Figure 3 and Figure 10As shown in the figure, a filter plate 29 is fixedly connected to the inner bottom end of the sedimentation tank body 3. An electric vibration block 36 is fixedly installed at the bottom of the filter plate 29. A converging plate 30 is fixedly connected to the upper surface of the filter plate 29. The filter plate 29 is in an inverted "V" shape. Discharge bins 31 are fixedly connected to both sides of the upper surface of the filter plate 29. One end of the discharge bin 31 is fixedly communicated with a discharge pipe 32. A material pumping pump 33 is arranged outside the discharge pipe 32. Torsion spring shaft seats 35 are fixedly connected to both sides of the discharge bin 31. A protective door 34 is fixedly connected to the shaft rod of the torsion spring shaft seat 35.

[0040] During operation: After the flocculation reaction is completed in the sedimentation tank body 3, the sediment settles to the surface of the filter plate 29. Under the combined action of the inclined surface of the filter plate 29 and the converging plate 30, the sediment accumulates at one end of the discharge bin 31. After a batch of titanium liquid has settled, the titanium liquid in the tank body 2 and the sedimentation tank body 3 is completely discharged. Subsequently, the material pumping pump 33 is started. The suction force generated by the material pumping pump 33 causes the protective door 34 to rotate hingedly around the torsion spring shaft seat 35, gradually opening the open end of the discharge bin 31. At the same time, the electric vibration block 36 works to assist the sediment to smoothly enter the discharge bin 31 and be discharged and collected through the discharge pipe 32. And after the material pumping pump 33 is turned off, the protective door 34 automatically rotates reversely and returns to its original position under the action of the torsion spring shaft seat 35, re-blocking the inlet end of the discharge bin 31.

[0041] As Figures 1 to 2 shown in the figure, a drain pipe 37 is fixedly communicated with the bottom of the tank body 2. A plurality of inlet holes are arranged at one end of the drain pipe 37 located inside the sedimentation tank body 3. An electric valve 38 is arranged outside the drain pipe 37.

[0042] During operation: During the sedimentation reaction of the titanium liquid, the excess titanium liquid will overflow from the overflow tank 7. When a batch of titanium liquid is processed, the electric valve 38 is opened, and the remaining titanium liquid in the tank body 2 and the sedimentation tank body 3 flows out through the bottom of the drain pipe 37, leaving only the sediment on the surface of the filter plate 29. Subsequently, the sediment is pumped out and collected, avoiding the mixing of the titanium liquid and the sediment, ensuring that the residual amount of titanium liquid in the sediment is extremely low, and thus greatly improving the purity of the finally collected sediment.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous sedimentation device for titanium dioxide production, comprising two support frames, characterized in that: A trough is fixedly connected between two support frames. A fixed frame is fixedly connected above the support frames. Above the fixed frame, a first feeding bin and a second feeding bin are respectively fixedly installed. A settling trough is fixedly connected to the inner wall of the trough. The bottoms of the trough and the settling trough are both conical in shape. A flocculation cylinder is arranged at the central position inside the settling trough. A plurality of one-way drainage holes are evenly arranged on the outer wall of the flocculation cylinder. The bottom outlet of the first feeding bin is located directly above the settling trough. The bottom outlet of the second feeding bin is located directly above the flocculation cylinder. An extrusion and spraying assembly for extruding and spraying flocculant is arranged inside the flocculation cylinder. An inner stirring assembly and an outer stirring assembly are respectively arranged inside and outside the flocculation cylinder.

2. The continuous sedimentation equipment for titanium dioxide production according to claim 1, wherein: A plurality of openings are evenly arranged on both sides of the settling trough. Filter cloths are arranged at the plurality of openings. Overflow troughs are fixedly connected to both sides of the trough. A plurality of absorbent cotton is arranged on the inner wall of the flocculation cylinder. The absorbent cotton is made of activated carbon fiber. One side of the plurality of absorbent cotton is respectively attached to one side of the plurality of one-way drainage holes.

3. The continuous sedimentation equipment for titanium dioxide production according to claim 2, wherein: The extrusion and spraying assembly includes a servo motor. The output shaft of the servo motor is fixedly connected with a rotating shaft. The rotating shaft is rotationally connected to the inner wall of the flocculation cylinder. An arc-shaped outer plate is fixedly connected to the outer wall of the rotating shaft. The arc-shaped outer plate is located inside the flocculation cylinder. One end of the arc-shaped outer plate is fixedly connected with a hinge seat. The shaft rod of the hinge seat is fixedly connected with an arc-shaped extrusion plate.

4. A continuous sedimentation device for titanium dioxide production according to claim 3, characterized in that: The inner stirring assembly includes a first rotating rod. The first rotating rod is rotationally connected to the inner wall of the arc-shaped outer plate. Stirring blades one are fixedly connected to the outer wall of the first rotating rod. Above the first rotating rod, a self-rotation assembly for driving the first rotating rod to rotate self is arranged.

5. The continuous sedimentation equipment for titanium dioxide production according to claim 4, characterized in that: A collar plate is fixedly connected to the top of the settling trough. The servo motor is fixedly installed on the top of the collar plate. The bottom of the collar plate is rotationally connected to the outer wall of the flocculation cylinder. The self-rotation assembly includes a first gear. The first gear is fixedly connected to the top of the first rotating rod. The teeth of the first gear are meshed with an external toothed ring. A plurality of inner sliders are slidably connected to the inner wall of the external toothed ring. The inner sliders are all fixedly connected to one side of the rotating shaft.

6. A continuous sedimentation device for titanium dioxide production according to claim 5, characterized in that: A positioning plate is fixedly connected to the inner wall of the flocculation cylinder. The positioning plate abuts against the side surface of the arc-shaped extrusion plate.

7. A continuous sedimentation device for titanium dioxide production according to claim 6, characterized in that: The outer stirring assembly includes a plurality of stirring blades two. One ends of the stirring blades two are all fixedly connected to the outer wall of the flocculation cylinder. The other ends of the stirring blades two are all fixedly connected with a second gear. The teeth of the second gear are meshed with a side toothed ring. The side toothed ring is fixedly connected to the bottom of the collar plate.

8. A continuous sedimentation device for titanium dioxide production according to claim 7, characterized in that: A plurality of telescopic rods are fixedly connected to one side of the arc-shaped extrusion plate. The ends of the telescopic rods far from the arc-shaped extrusion plate are fixedly connected to the outer wall of the arc-shaped outer plate. A protective spring is arranged outside the telescopic rods. Both ends of the protective spring are fixedly connected to one side of the arc-shaped extrusion plate and the outer wall of the arc-shaped outer plate.

9. The continuous sedimentation equipment for titanium dioxide production according to claim 8, characterized in that: A filter plate is fixedly connected to the inner bottom end of the settling trough. An electric vibration block is fixedly installed at the bottom of the filter plate. A converging plate is fixedly connected to the upper surface of the filter plate. The filter plate is in an inverted "V" shape. Discharge bins are fixedly connected to both sides of the upper surface of the filter plate. One end of the discharge bin is fixedly communicated with a discharge pipe. A pumping pump is arranged outside the discharge pipe. Twisting spring seats are fixedly connected to both sides of the discharge bin. The shaft rods of the twisting spring seats are fixedly connected with protective doors.

10. A continuous sedimentation device for titanium dioxide production according to claim 9, characterized in that: A drain pipe is fixedly communicated with the bottom of the trough. A plurality of inlet holes are arranged at the end of the drain pipe located inside the settling trough. An electric valve is arranged outside the drain pipe.

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