A settling tank with high settling uniformity for sulfuric acid method titanium dioxide production

Abstract

The utility model discloses a high sedimentation tank of evenness of sedimentation of sulphuric acid method titanium dioxide production belongs to the technical field of sedimentation tank equipment, including tank body, sedimentation chamber, feed pipe, discharge pipe, blowdown pipe and a plurality of seat, install the flow guide device in the sedimentation chamber, the flow guide device includes flow guide casing, and the inside space of flow guide casing is divided into buffer chamber and flow guide chamber, and wherein buffer chamber is linked with feed pipe, and the buffer plate is spaced between buffer chamber and flow guide chamber, and a plurality of buffer grooves are set up on every buffer plate, and a plurality of flow guide plates are fixed in flow guide chamber, and the flow guide groove that flows up and down is surrounded between every two adjacent flow guide plates. When sedimentation, titanium liquid is pressurized into buffer chamber through feed pipe, changes titanium liquid flow direction through buffer groove to reduce titanium liquid initial kinetic energy, then guides flow through the inclined flow guide groove, gradually consumes titanium liquid kinetic energy, avoids impurity splashing, secondly, directional flow of flow guide groove reduces noise, makes whole sedimentation process more quiet.

Description

Technical Field

[0001] This utility model relates to the technical field of settling tank equipment, specifically a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process. Background Technology

[0002] In the sulfuric acid process for titanium dioxide production, the settling tank is the core equipment for separating molten titanium (containing impurities such as silica and zircon) from other impurities, relying on gravity settling to achieve solid-liquid separation. Existing settling tanks generally suffer from the following technical problems: Without a flow guide structure: the titanium liquid is directly fed in from the top. When the titanium liquid in the high settling tank reaches the bottom of the tank, it still has a large kinetic energy, which can easily splash impurities and disrupt the uniformity of settling. Noise issue: The high-speed flow of molten titanium impacts the tank walls / bottom, generating significant noise; Therefore, there is an urgent need for a flow guiding device that can buffer kinetic energy and guide the smooth flow of molten titanium. Utility Model Content

[0003] The first technical problem this utility model aims to solve is to provide a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process. By reducing the kinetic energy of the titanium liquid and directing the flow, it can prevent impurities from splashing, thereby improving the settling uniformity and noise reduction effect, and solving the problems of poor settling uniformity and high noise in traditional settling tanks.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process includes a tank body, a settling cavity opened inside the tank body, a feed pipe horizontally fixed above the side wall of the tank body and communicating with the settling cavity, a discharge pipe horizontally fixed below the side wall of the tank body and communicating with the settling cavity, a drain pipe vertically fixed at the center of the bottom end of the tank body and communicating with the settling cavity, and multiple supports fixed to the side wall of the tank body and arranged in a circumferential array. Its core improvement lies in the fact that a flow guiding device is installed inside the settling chamber, extending from its top to its bottom. The flow guiding device includes a vertically arranged flow guiding shell, the internal space of which is divided into a buffer chamber in the middle and flow guiding chambers on the left and right sides of the buffer chamber, wherein the buffer chamber is connected to the feed pipe; A vertically arranged buffer plate is installed between the buffer chamber and the flow guide chamber. Each buffer plate has multiple linearly arranged buffer grooves that connect the buffer chamber and the flow guide chamber. The opening direction of the buffer groove is perpendicular to the flow direction of the fluid in the buffer chamber. Multiple linearly arranged and vertically inclined flow guide plates are fixed in the flow guide chamber. Each pair of adjacent flow guide plates forms a flow guide groove for vertical flow.

[0005] By adopting the above scheme, during sedimentation, the titanium liquid is pressurized and enters the buffer chamber through the feed pipe. The flow direction of the titanium liquid is changed by the buffer tank to reduce the initial kinetic energy of the titanium liquid. Then, the flow is guided by the inclined guide channel to gradually consume the kinetic energy of the titanium liquid and avoid splashing of impurities. Secondly, the directional flow of the guide channel reduces noise, making the whole sedimentation process quieter.

[0006] In a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, the number of buffer tanks is equal to the number of guide tanks, and the position of each buffer tank corresponds vertically to the position of each guide tank, so that the titanium liquid flows more smoothly from the buffer chamber into the guide chamber.

[0007] As a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, the guide plate is a corrugated plate to improve the overall rigidity and strength of the guide plate; both the front and rear surfaces of the guide plate are coated with a wear-resistant layer, such as a ceramic coating, which can resist particle wear and further extend the service life of the guide plate.

[0008] As a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, all guide plates are permeated by multiple reinforcing screws arranged perpendicularly to each other. The front and rear ends of the reinforcing screws are respectively equipped with reinforcing nuts to fasten all guide plates, which further improves the positioning effect of all guide plates and also prevents the guide plates from deforming.

[0009] As a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, the angle of inclination between the guide plate and the horizontal plane is 40-60°, which ensures smooth flow and reduces flow velocity.

[0010] As a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, a vertically arranged vertical baffle plate is fixed inside the settling chamber, and the bottom of the vertical baffle plate is connected to a horizontally arranged horizontal baffle plate. A settling separation port is opened on the vertical baffle plate, and a downward-facing inlet is opened on the section of the discharge pipe located in the settling chamber. The settling separation port is used for the passage of the clear liquid after settling. A "sedimentation protection zone" is formed by the vertical baffle plate and the horizontal baffle plate, which can effectively block the splashed impurities and further improve the settling effect.

[0011] In a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, a reagent tube is fixed horizontally above the side wall of the tank and communicates with the settling chamber. A delivery tube is fixed vertically inside the settling chamber and communicates with the reagent tube. The bottom end of the delivery tube is an outlet communicating with the settling chamber. By adding flocculant into the reagent tube, sedimentation can be accelerated, thereby improving the reaction efficiency.

[0012] As a preferred embodiment of a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, the bottom wall of the tank is inclined and lowered towards the location of the drain pipe, so that the settling impurities quickly gather and accumulate in the drain pipe, making it easier to open the drain pipe later to clean up the accumulated impurities.

[0013] The second technical problem to be solved by this utility model is to provide a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process. By adding a flow divider in the buffer chamber, the titanium liquid is made to flow evenly into the guide chambers on the left and right sides, which further solves the problem of poor settling uniformity in traditional settling tanks.

[0014] To achieve the above objectives, the present invention adopts the following technical solution: Based on the above scheme, a flow divider seat is fixed at the bottom of the buffer cavity, located in the middle and facing the flow direction of the titanium liquid; wherein, the cross-sectional shape of the flow divider seat is an isosceles triangle, and the apex of the isosceles triangle faces the flow direction of the titanium liquid.

[0015] By adopting the above scheme, when the titanium liquid enters the buffer chamber, it first rushes towards the diversion seat. The isosceles triangular diversion seat can ensure the uniform distribution of the titanium liquid, so that the titanium liquid flows evenly into the guide chambers on the left and right sides, further improving the uniformity of titanium liquid sedimentation.

[0016] The beneficial effects of this utility model are: 1. Buffering and reducing kinetic energy: After the titanium liquid is pressurized and enters the buffer chamber through the feed pipe, the flow direction of the titanium liquid is changed by the buffer tank to reduce the initial kinetic energy of the titanium liquid. Then, the flow is guided by the inclined guide channel to gradually consume the kinetic energy of the titanium liquid and avoid impurities splashing. 2. Quiet and uniform: The directional flow of the guide channel reduces noise, making the entire settling process quieter; 3. High durability: The corrugated plate can improve the overall rigidity and strength of the guide plate, the wear-resistant layer can extend the service life of the guide plate, and the reinforced screw can improve the positioning effect of all guide plates and prevent their deformation. 4. Improve sedimentation uniformity: When the titanium liquid enters the buffer chamber, it first rushes towards the flow divider. The isosceles triangular flow divider can ensure the uniform distribution of the titanium liquid, so that the titanium liquid flows evenly into the guide chambers on the left and right sides, further improving the uniformity of titanium liquid sedimentation. 5. No impurities are carried away: The vertical and horizontal baffles form a "sedimentation protection zone", which can effectively block splashed impurities and further improve the sedimentation effect; 6. High reaction efficiency: Adding flocculant to the reagent tube can accelerate precipitation, thereby improving reaction efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the settling tank with high settling uniformity used in the sulfuric acid process for titanium dioxide production in Example 1. Figure 2 A three-dimensional structural diagram of the internal structure of a settling tank with high settling uniformity for the sulfuric acid process titanium dioxide production; Figure 3 The three-dimensional structure of the flow guiding device Figure 1 ; Figure 4 The three-dimensional structure of the flow guiding device Figure 2 ; Figure 5 To showcase Figure 3 Three-dimensional diagram of the internal structure of the buffer chamber; Figure 6 To showcase Figure 3 Three-dimensional diagram of the internal structure of the central guide cavity; Figure 7 for Figure 6 A magnified view of a section at point A in the middle; Figure 8 for Figure 6 A magnified view of a section at point B in the middle; Figure 9 To hide Figure 1 3D structural diagram of the rear of the middle tank; Figure 10 This is a 3D structural diagram of the discharge pipe; Figure 11 This is a top view of the settling tank with high settling uniformity used in the sulfuric acid process for titanium dioxide production in Example 2; Reference numerals in the attached drawings: 1-Tank body; 2-Settling chamber; 3-Infeed pipe; 4-Outfeed pipe; 5-Sewage pipe; 6-Support; 7-Flow guiding device; 71-Flow guiding shell; 72-Buffer chamber; 73-Flow guiding chamber; 74-Buffer plate; 75-Buffer trough; 76-Flow guiding plate; 77-Flow guiding trough; 78-Reinforcing screw; 79-Reinforcing nut; 710-Flow divider seat; 8-Vertical baffle plate; 9-Horizontal baffle plate; 10-Settling separation port; 11-Inlet; 12-Reagent tube; 13-Transfer pipe; 14-Inspection cover. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1, as Figures 1 to 2 As shown, a settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process is used to separate titanium liquid (containing impurities such as silica and zircon) from impurities. It includes a tank body 1 (vertical cylindrical shape), a settling chamber 2 opened inside the tank body 1, a feed pipe 3 horizontally fixed above the side wall of the tank body 1 and connected to the settling chamber 2, a discharge pipe 4 horizontally fixed below the side wall of the tank body 1 and connected to the settling chamber 2, a drain pipe 5 vertically fixed at the center of the bottom end of the tank body 1 and connected to the settling chamber 2, and four supports 6 fixed to the side wall of the tank body 1 and arranged in a circumferential array.

[0021] like Figures 3 to 4 As shown, a flow guiding device 7 is installed in the settling chamber 2, extending from its top to its bottom; the flow guiding device 7 includes a vertically arranged flow guiding shell 71, the internal space of which is divided into a buffer chamber 72 located in the middle and flow guiding chambers 73 located on the left and right sides of the buffer chamber 72, wherein the buffer chamber 72 is connected to the feed pipe 3.

[0022] like Figures 5 to 7 As shown, a vertically arranged buffer plate 74 is installed between the buffer chamber 72 and the flow guiding chamber 73 at intervals. Each buffer plate 74 has 10 linearly arranged buffer grooves 75 (strip grooves) that connect the buffer chamber 72 and the flow guiding chamber 73. The opening direction of the buffer groove 75 is perpendicular to the flow direction of the fluid in the buffer chamber 72. Ten linearly arranged and vertically inclined flow guiding plates 76 are fixed in the flow guiding chamber 73. Each pair of adjacent flow guiding plates 76 forms a flow guiding groove 77 for vertical flow.

[0023] Continue as Figures 5 to 7 As shown, the number of buffer grooves 75 (10) is equal to the number of guide grooves 77 (10), and the position of each buffer groove 75 corresponds vertically to the position of each guide groove 77, so that the titanium liquid flows more smoothly from the buffer cavity 72 into the guide cavity 73.

[0024] like Figure 7 As shown, the deflector 76 is a corrugated plate to improve the overall rigidity and strength of the deflector 76; the front and rear surfaces of the deflector 76 are coated with a wear-resistant layer (ceramic coating) to resist particle wear and further extend the service life of the deflector 76.

[0025] like Figure 8 As shown, all the guide plates 76 are permeated by two reinforcing screws 78 arranged perpendicularly to each other. The front and rear ends of the reinforcing screws 78 are respectively equipped with reinforcing nuts 79 to fasten all the guide plates 76, which further improves the positioning effect of all the guide plates 76 and can also prevent the guide plates 76 from deforming.

[0026] like Figure 6 As shown, the angle of inclination between the guide plate 76 and the horizontal plane is 40-60°, with 60° being the preferred angle in the figure, which ensures smooth flow and reduces flow velocity.

[0027] like Figures 9 to 10 As shown, a vertically arranged vertical baffle plate 8 is also fixed inside the settling chamber 2, and the bottom of the vertical baffle plate 8 is connected to a horizontally arranged horizontal baffle plate 9; a settling separation port 10 is opened on the vertical baffle plate 8, and a downward-facing inlet 11 is opened on the section of the discharge pipe 4 located in the settling chamber 2. The settling separation port 10 is used for the clear liquid after settling to pass through. The vertical baffle plate 8 and the horizontal baffle plate 9 form a "sedimentation protection zone", which can effectively block the splashed impurities and further improve the settling effect.

[0028] Continue as Figure 9 As shown, a reagent tube 12, which is horizontally arranged and communicates with the settling chamber 2, is also fixed above the side wall of the tank body 1. A delivery tube 13, which is vertically arranged and connected to the reagent tube 12, is fixed inside the settling chamber 2. The bottom end of the delivery tube 13 is the outlet that communicates with the settling chamber 2. By adding flocculant into the reagent tube 12, the sedimentation can be accelerated, thereby improving the reaction efficiency.

[0029] like Figures 1 to 2 As shown, the top of the tank 1 is fixed with an inspection cover 14 by screws, which facilitates subsequent maintenance and repair.

[0030] like Figure 2 As shown, the bottom wall of tank 1 is inclined and lowered towards the location of drain pipe 5, so that the settled impurities can quickly gather and accumulate in drain pipe 5, making it easier to open drain pipe 5 later to clean up the accumulated impurities.

[0031] Working principle of Example 1: Tank 1 is suspended in the air by support 6. After the titanium liquid is pressurized and enters the buffer chamber 72 through the feed pipe 3, the flow direction of the titanium liquid is changed by the buffer tank 75 to reduce the initial kinetic energy of the titanium liquid. Then, the flow is guided by the inclined guide channel 77 to gradually consume the kinetic energy of the titanium liquid and avoid splashing of impurities. Secondly, the directional flow of the guide channel 77 reduces noise, making the entire sedimentation process quieter. By adding flocculant to the reagent tube 12, sedimentation can be accelerated, thereby improving the reaction efficiency. After the titanium liquid settles in the sedimentation chamber 2, when the titanium liquid reaches the sedimentation separation port 10, the clear liquid after sedimentation passes through the sedimentation separation port 10 and the inlet 11 in sequence into the discharge pipe 4, and then is discharged from the discharge pipe 4.

[0032] Example 2, as Figure 11 As shown, the difference between this embodiment and Embodiment 1 is that, based on Embodiment 1, a flow divider 710 located in the center of the buffer cavity 72 and facing the flow direction of the titanium liquid is welded and fixed at the bottom of the buffer cavity 72; wherein, the cross-sectional shape of the flow divider 710 is an isosceles triangle, and the apex of the isosceles triangle faces the flow direction of the titanium liquid.

[0033] Working principle of Example 2: When the titanium liquid enters the buffer chamber 72, it first rushes towards the diversion seat 710. The isosceles triangular diversion seat 710 can ensure the uniform distribution of the titanium liquid, so that the titanium liquid flows evenly into the guide chambers 73 on the left and right sides, further improving the uniformity of titanium liquid sedimentation.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A settling tank with high settling uniformity for the production of titanium dioxide using the sulfuric acid process, comprising a tank body, a settling cavity opened inside the tank body, a feed pipe horizontally fixed above the side wall of the tank body and communicating with the settling cavity, a discharge pipe horizontally fixed below the side wall of the tank body and communicating with the settling cavity, a drain pipe vertically fixed at the center of the bottom end of the tank body and communicating with the settling cavity, and multiple supports fixed to the side wall of the tank body and arranged in a circumferential array; Its features are: The settling chamber is equipped with a flow guiding device that extends from its top to its bottom. The flow guiding device includes a vertically arranged flow guiding shell, the internal space of which is divided into a buffer chamber in the middle and flow guiding chambers on the left and right sides of the buffer chamber, wherein the buffer chamber is connected to the feed pipe; A vertically arranged buffer plate is installed between the buffer chamber and the flow guiding chamber. Each buffer plate has multiple buffer grooves arranged in a linear array that connect the buffer chamber and the flow guiding chamber. The opening direction of the buffer groove is perpendicular to the flow direction of the fluid in the buffer chamber. Multiple linearly arranged and vertically inclined flow guiding plates are fixed in the flow guiding chamber. Each pair of adjacent flow guiding plates forms a flow guiding groove for vertical flow.

2. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The number of buffer slots is equal to the number of guide slots, and the position of each buffer slot corresponds vertically to the position of each guide slot.

3. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The guide plate is a corrugated plate, and both the front and rear surfaces of the guide plate are coated with a wear-resistant layer.

4. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: All the deflectors are permeated by multiple reinforcing screws that are perpendicular to each other, and the front and rear ends of the reinforcing screws are respectively fitted with reinforcing nuts that fasten all the deflectors.

5. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The angle of inclination between the guide plate and the horizontal plane is 40-60°.

6. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The bottom of the buffer chamber is fixed with a flow divider located in the center and facing the direction of fluid flow.

7. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 6, characterized in that: The cross-sectional shape of the flow divider is an isosceles triangle, with the apex of the isosceles triangle facing the direction of fluid flow.

8. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The settling chamber is also fixed with a vertically arranged vertical baffle plate, the bottom of which is connected to a horizontally arranged horizontal baffle plate; a settling separation port is provided on the vertical baffle plate, and a downward-facing inlet is provided on the section of the discharge pipe located in the settling chamber.

9. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: A reagent tube, arranged horizontally and connected to the settling chamber, is fixed above the side wall of the tank. A delivery tube, arranged vertically and connected to the reagent tube, is fixed inside the settling chamber. The bottom end of the delivery tube is an outlet connected to the settling chamber.

10. The settling tank with high settling uniformity for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The bottom wall of the tank is inclined and lowered towards the location of the sewage pipe.

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