A suction discharge device of a pulverizer for sulfuric acid method titanium dioxide production

Abstract

The utility model discloses a kind of sulphuric acid method titanium dioxide production is used to suck and discharge device of pulverizer, belong to the technical field of pulverizer equipment, including vertically arranged discharge cylinder and the discharge pipeline that is installed on the outside wall of discharge cylinder and with the internal communication of discharge cylinder;Suction motor is installed in the top outside of discharge cylinder, and the wind wheel located in the inside of discharge cylinder is coaxially docked on the rotating shaft of suction motor, the periphery of wind wheel is installed with its wrapped wheel cover, discharge pipeline extends to the inside of wheel cover, the bottom of wheel cover is provided with suction port corresponding with the position of wind wheel up and down. Since titanium dioxide primary product is crushed into powder in the process, powder will rise due to light quality, when suction motor drives wind wheel to rotate, negative pressure is formed in wheel cover, powder rising from above is sucked through suction port, and discharge pipeline is discharged in cooperation, both avoid powder accumulation in the upper portion of cylinder, and the fineness of discharged powder will be higher.

Description

Technical Field

[0001] This utility model relates to the technical field of pulverizer equipment, specifically to a pulverizer suction and discharge device for the production of titanium dioxide using the sulfuric acid process. Background Technology

[0002] The sulfuric acid process for titanium dioxide production mainly consists of five core stages: titanium ore preparation, acid hydrolysis, hydrolysis, calcination, and post-treatment. Specifically: Titanium ore preparation: Ilmenite is crushed and ground to a particle size ≤0.15mm to remove magnetic impurities; Acid hydrolysis reaction: Titanium ore powder reacts with concentrated sulfuric acid (92%-98%) at high temperature (120-180℃) to generate titanium oxysulfate solution; Sedimentation and filtration: Impurities are separated from the acid hydrolysis solution in a sedimentation tank, and unreacted slag is removed by a plate and frame filter press; Hydrolysis reaction: Titanium oxysulfate is hydrolyzed to generate metatitanic acid slurry, requiring temperature control (90℃) and seed crystal addition; Calcination: Metatitanic acid is calcined at high temperature (800-1000℃) in a rotary kiln to convert it into primary titanium dioxide; Post-treatment includes crushing, grading, surface coating (inorganic / organic treatment), and packaging.

[0003] In the post-processing stage, the crushing process primarily relies on a crusher to pulverize the raw titanium dioxide into powder. Currently, the discharge device of existing crushers is usually located at the bottom of the cylinder, relying on gravity for natural discharge. However, during the crushing process, the high-speed rotating crushing media (such as hammers and grinding balls) will lift the powder to the top of the cylinder, causing the powder to accumulate in the cylinder space, resulting in delayed discharge, reduced crushing efficiency, and even equipment blockage, affecting production continuity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process. The device actively guides the rising powder to the discharge channel through negative pressure airflow, improving the traditional bottom discharge to top suction of the cylinder, thus solving the problem of powder accumulation and improving discharge efficiency and pulverizer working stability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A pulverizer suction and discharge device for the production of titanium dioxide using the sulfuric acid process includes a vertically arranged discharge cylinder and a discharge pipe installed on the outer wall of the discharge cylinder and communicating with the inside of the discharge cylinder. Its core improvement is that a suction motor is installed on the top outer side of the discharge cylinder, and a fan wheel located inside the discharge cylinder is coaxially connected to the rotating shaft of the suction motor. A wheel cover is installed around the fan wheel, and the discharge pipe extends all the way into the inside of the wheel cover. A suction port corresponding to the position of the fan wheel is opened at the bottom of the wheel cover.

[0006] By adopting the above scheme, during the process of crushing the titanium dioxide raw material into powder, the powder will rise due to its light weight. When the suction motor drives the impeller to rotate, a negative pressure is formed in the impeller shroud, which draws the rising powder into the suction port and discharges it through the discharge pipe. This not only avoids the accumulation of powder in the upper part of the cylinder, but also results in a higher degree of fineness of the discharged powder.

[0007] In a preferred embodiment of the suction and discharge device for a pulverizer used in the sulfuric acid process for titanium dioxide production, a horizontally arranged partition plate is fixed on the horizontal plane where the suction port is located, so that the powder flows only from the suction port, which can further enhance the suction force. The partition plate divides the interior of the discharge cylinder into an upper discharge space and a lower discharge space, wherein the impeller is located in the upper discharge space.

[0008] As a preferred embodiment of the suction and discharge device for a pulverizer used in the sulfuric acid process for titanium dioxide production, the opening diameter of the suction port is smaller than the minimum diameter of the impeller, ensuring that the negative pressure airflow is concentrated on the suction port and improving the powder capture rate.

[0009] As a preferred embodiment of the suction and discharge device for a pulverizer used in the sulfuric acid process for titanium dioxide production, the impeller is shaped like a truncated cone that is wider at the top and narrower at the bottom. The blades of the impeller are arranged in a circumferential array on the side of the impeller, making the rotating airflow more uniform and powerful, and further enhancing the suction capacity.

[0010] As a preferred embodiment of the suction and discharge device for a pulverizer used in the sulfuric acid process for titanium dioxide production, a guide plate is fixed at the bottom of the partition plate, which converges towards the suction port, thereby enhancing the suction coverage and assisting in guiding the powder. The guide plate is located in the lower discharge space and is an annular arc panel, which makes guiding the powder smoother.

[0011] As a preferred embodiment of the suction and discharge device for a pulverizer used in the sulfuric acid process for titanium dioxide production, there are two discharge pipes, which are symmetrically distributed about the location of the impeller, further improving the discharge efficiency.

[0012] The beneficial effects of this utility model are: 1. Prevent powder accumulation: The suction motor drives the impeller to rotate, creating a negative pressure inside the impeller cover. This draws the powder rising from above into the suction port and discharges it through the discharge pipe, thus preventing powder from accumulating in the upper part of the cylinder. 2. High degree of refinement: Since larger particles cannot be sucked out, only lighter powder is sucked out by negative pressure, making the discharge more refined; 3. Improve discharge efficiency: The guide plate (annular arc panel) gathers the powder in the lower space towards the suction port, enhances the suction coverage, and improves discharge efficiency. Attached Figure Description

[0013] 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.

[0014] Figure 1 A three-dimensional structural diagram of the suction and discharge device of a pulverizer used in the sulfuric acid process for titanium dioxide production; Figure 2 This is a three-dimensional structural diagram of the suction and discharge device of a pulverizer used in the sulfuric acid process for titanium dioxide production. Figure 3 Three-dimensional structure of wind turbine and related components Figure 1 ; Figure 4 Three-dimensional structure of wind turbine and related components Figure 2 .

[0015] Attached reference numerals: 1-Discharge cylinder; 2-Discharge pipe; 3-Suction motor; 4-Impeller; 5-Wheel cover; 6-Suction port; 7-Baffle plate; 8-Guide plate. Detailed Implementation

[0016] 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.

[0017] like Figure 1 As shown, a suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process is applied in a pulverizer. The lower part of the suction and discharge device is connected to the pulverizing device. Specifically, it includes a vertically arranged discharge cylinder 1 and a discharge pipe 2 installed on the outer wall of the discharge cylinder 1 and communicating with the inside of the discharge cylinder 1.

[0018] like Figure 1 As shown, there are two discharge pipes 2, which are symmetrically distributed about the location of the impeller 4, further improving the discharge efficiency.

[0019] like Figures 2 to 4 As shown, a suction motor 3 is bolted to the top outer side of the discharge cylinder 1. A blower 4 located inside the discharge cylinder 1 is coaxially connected to the rotating shaft of the suction motor 3. A wheel cover 5 is welded around the blower 4 and covers it. The discharge pipe 2 extends all the way to the inside of the wheel cover 5. A suction port 6 is opened at the bottom of the wheel cover 5, which corresponds to the position of the blower 4.

[0020] Continue as Figures 2 to 4 As shown, a horizontally arranged partition plate 7 is also welded and fixed on the horizontal plane where the suction port 6 is located, so that the powder flows only from the suction port 6, which can further enhance the suction. The partition plate 7 divides the interior of the discharge cylinder 1 into an upper discharge space and a lower discharge space, wherein the impeller 4 is located in the upper discharge space.

[0021] Continue as Figures 2 to 4 As shown, the opening diameter of the suction port 6 is smaller than the minimum diameter of the impeller 4, ensuring that the negative pressure airflow is concentrated on the suction port 6, thereby improving the powder capture rate.

[0022] Continue as Figures 2 to 4 As shown, the shape of the wind turbine 4 is like a truncated cone that is wider at the top and narrower at the bottom. The blades of the wind turbine 4 are arranged in a circumferential array on the side of the wind turbine 4, which makes the rotating airflow more uniform and powerful, and further enhances the suction capacity.

[0023] Continue as Figures 2 to 4 As shown, a guide plate 8 is welded and fixed to the bottom of the partition plate 7, which converges towards the suction port 6, thereby enhancing the suction coverage and improving the discharge efficiency. The guide plate 8 is located in the lower discharge space and is an annular arc panel, which will guide the powder more smoothly.

[0024] Working principle: Suction negative pressure is formed: When the suction motor 3 starts, it drives the frustum-shaped impeller 4 to rotate at high speed. The side blades of the impeller 4 push the airflow, forming a negative pressure airflow from top to bottom inside the wheel cover 5.

[0025] Powder capture and conveying: The powder rising above the crushing cylinder of the crushing device is guided by the annular arc-shaped guide plate 8 to the suction port 6 under negative pressure, and then enters the wheel cover 5 through the suction port 6; subsequently, it is carried by the airflow of the impeller 4 and discharged along the discharge pipe 2 to the collection system, such as... Figure 2 As shown.

[0026] 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 pulverizer suction and discharge device for the production of titanium dioxide using the sulfuric acid process, comprising a vertically arranged discharge cylinder and a discharge pipe installed on the outer wall of the discharge cylinder and communicating with the interior of the discharge cylinder; Its features are: A suction motor is installed on the top outer side of the discharge cylinder. A fan wheel located inside the discharge cylinder is coaxially connected to the rotating shaft of the suction motor. A wheel cover is installed around the fan wheel and extends into the wheel cover. A suction port corresponding to the position of the fan wheel is opened at the bottom of the wheel cover.

2. The suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process according to claim 1, characterized in that: A horizontally arranged partition plate is also fixed on the horizontal plane where the suction port is located. The partition plate divides the interior of the discharge cylinder into an upper discharge space and a lower discharge space, with the impeller located in the upper discharge space.

3. The suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process according to claim 1, characterized in that: The opening diameter of the suction port is smaller than the minimum diameter of the impeller.

4. The suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process according to claim 1, characterized in that: The wind turbine is shaped like a truncated cone, wider at the top and narrower at the bottom.

5. The suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process according to claim 1, characterized in that: The blades of the wind turbine are arranged in a circumferential array on the side of the wind turbine.

6. The suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process according to claim 2, characterized in that: The bottom of the partition plate is fixed with a guide plate that converges towards the suction port; wherein the guide plate is located in the lower discharge space.

7. The suction and discharge device for a pulverizer used in the production of titanium dioxide using the sulfuric acid process according to claim 6, characterized in that: The guide plate is an annular arc panel.

8. The pulverizer suction discharge device for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: There are two discharge pipes, which are symmetrically distributed about the location of the wind turbine.

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