Acid feeding device of continuous acidolysis premixing tank

Abstract

The utility model discloses an acid feeding device of a continuous acidolysis premixing tank, which relates to the technical field of titanium dioxide chemical equipment and comprises a premixing container and a spraying module. The device is simple in structure and reliable in function, the premixing container is used for containing ilmenite powder and providing space support for mixing of the ilmenite powder and sulfuric acid, and the spraying module comprises a spraying coil pipe and a stirring shaft spraying pipe which are respectively communicated with the acid inlet vertical pipe. Sulfuric acid sprayed out of the spraying coil pipe to the periphery can wash away ilmenite powder attached to the inner wall of the premixing tank, sulfuric acid sprayed out of the spraying pipe of the stirring shaft can wash away ilmenite powder attached to the surface of the stirring shaft, and the problem that ilmenite powder is attached to the inner wall of the premixing tank and the surface of the stirring shaft in the prior art is solved; and meanwhile, special manual cleaning is not needed, the automation degree is high, damage of ilmenite powder and sulfuric acid to the body of a worker is avoided, and the market prospect is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide chemical equipment, in particular to an acid inlet device for a continuous acidolysis premixing tank. Background Art

[0002] The acid hydrolysis premixing process is the main operation step of the continuous acid hydrolysis reaction. The purpose is to mix the sulfuric acid and ilmenite powder involved in the reaction so that the ore powder is soaked by sulfuric acid and evenly dispersed in the sulfuric acid. In actual operation, sulfuric acid and ore powder are added to the premixing tank twice. Due to the dust phenomenon during the addition of ore powder, part of the ore powder adheres to the inner wall of the premixing tank and the stirring shaft, which requires manual regular cleaning, which is time-consuming and labor-intensive, and has certain damage to the workers' health. Summary of the invention

[0003] In order to overcome the problem existing in the above-mentioned background technology that "when mineral powder is added into the premixing tank, part of the mineral powder adheres to the inner wall of the premixing tank and the stirring shaft, requiring manual regular cleaning, which is time-consuming and labor-intensive", the utility model provides an acid inlet device for a continuous acid hydrolysis premixing tank.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A continuous acid hydrolysis premixing tank acid inlet device, comprising a premixing container and a spray module; the premixing container is a shell-shaped structure, the inner cavity of the premixing container is a premixing tank for mixing sulfuric acid and ilmenite powder; the spray module is fixedly installed at the top position of the premixing tank; the spray module comprises a ring-shaped or quasi-ring-shaped spray coil, the side wall of the spray coil is provided with spray holes pointing to the inner wall of the premixing tank; the spray coil is connected and communicated with an acid inlet riser, the acid inlet riser is connected with a stirring shaft spray pipe for cleaning the stirring shaft, and the acid inlet riser is communicated with the stirring shaft spray pipe.

[0006] As a further optimization solution of the utility model, the spray hole is arranged below the outer wall of the acid inlet riser.

[0007] As a further optimization solution of the utility model, the axis of the spray hole points outward and obliquely downward.

[0008] As a further optimization solution of the present invention, the inclination angle of the spray hole is 30 to 60 degrees.

[0009] As a further optimization solution of the utility model, the stirring shaft is placed at the axis center position of the premixing tank; the stirring shaft is placed upright.

[0010] As a further optimization solution of the utility model, a stirring claw is installed at the bottom end of the stirring shaft.

[0011] As a further optimization solution of the present utility model, the stirring shaft spray pipe is arranged horizontally.

[0012] As a further optimization solution of the utility model, the stirring shaft spray pipe is transversely arranged and connected to the middle position of the acid inlet riser.

[0013] As a further optimization solution of the utility model, the acid inlet riser is connected through the top plate of the premixing container.

[0014] As a further optimization solution of the utility model, the bottom of the side wall of the premixing container is connected to a discharge port; and the bottom of the premixing tank is provided with an inclined bottom surface.

[0015] In summary, the utility model is beneficial in that: the utility model has a simple structure and reliable functions, the premixing container is used to hold ilmenite powder and provide space support for the mixing of ilmenite powder and sulfuric acid, the spray module includes a spray coil and a stirring shaft spray pipe respectively connected to the acid inlet riser, the sulfuric acid sprayed toward the periphery by the spray coil can wash away the ilmenite powder adhering to the inner wall of the premixing tank, and the sulfuric acid sprayed inwardly by the stirring shaft spray pipe can wash away the ilmenite powder adhering to the surface of the stirring shaft, which solves the problem of ilmenite powder adhering to the inner wall of the premixing tank and the surface of the stirring shaft in the traditional technology, and at the same time, no manual special cleaning is required, it has a high degree of automation, avoids the damage of ilmenite powder and sulfuric acid to the workers' bodies, and has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described below with reference to the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is the schematic diagram of the location and structure of the spray module;

[0019] Figure 3 It is a schematic diagram of the spray hole position and structure;

[0020] Figure 4 It is a schematic diagram of the top view of the structure of the spray coil a;

[0021] Figure 5 It is a top view schematic diagram of the structure of the spray coil b;

[0022] Figure 6 It is a top view schematic diagram of the spray coil c structure;

[0023] Figure 7 This is a schematic diagram of the installation position and structure of the stirring shaft;

[0024] Figure 8 It is a schematic diagram of the connection structure between the stirring blade and the stirring shaft;

[0025] Fig. 9 It is a schematic diagram of the connection structure between the stirring vertical rod, stirring horizontal rod and stirring shaft;

[0026] Fig.10 It is a schematic diagram of the connection structure between the stirring blade, stirring rod and stirring shaft;

[0027] Fig.11 It is a top view schematic diagram of the installation position and structure of the circular inner coil;

[0028] Fig.12 It is a top view schematic diagram of the installation position and structure of the spiral linear inner coil.

[0029] Description of reference numerals:

[0030] In the figure,

[0031] 1. Premixing container; 11. Premixing tank; 12. Discharging port; 13. Inclined bottom surface;

[0032] 2. Spray module; 21. Spray coil; 211. Spray hole; 22. Acid inlet riser; 23. Stirring shaft spray pipe; 24. Horizontal pipe; 25. Inner coil;

[0033] 3. stirring shaft; 31. stirring blade; 32. stirring vertical rod; 321. stirring horizontal rod; 33. adapter rod;

[0034] 21a, spray coil a; 21b, spray coil b; 21c, spray coil c. DETAILED DESCRIPTION

[0035] Based on the above structural features of the present application, the implementation methods of the present application are further described:

[0036] Reference Figure 1 The present embodiment provides a continuous acid hydrolysis premixing tank acid inlet device, comprising a premixing container 1 and a spray module 2; the premixing container 1 is a shell-like structure in the shape of a fixed diameter straight cylinder, and the inner cavity of the premixing container 1 is a premixing tank 11 for mixing sulfuric acid and ilmenite powder. The premixing container 1 comprises a cylindrical side plate and a top plate and a bottom plate fixedly installed at the top and bottom ends of the side plate, and the side plate, the top plate and the bottom plate surround and form the premixing tank 11.

[0037] Reference Figure 1 and Figure 2 A feed port is provided on the top plate, and an openable and closable door is installed at the feed port; the feed port is used to feed ilmenite powder into the premixing tank 11.

[0038] Reference Figure 1 and Figure 2The spray module 2 is fixedly installed at the top of the premixing tank 11 ; sulfuric acid is sprayed on the ilmenite powder through the top of the premixing tank 11 , and then the mixture of sulfuric acid and ilmenite powder gathers at the bottom of the premixing tank 11 .

[0039] Reference Figure 1 to Figure 6 The spray module 2 includes a spray coil 21 in a circular or quasi-circular shape, and a spray hole 211 pointing to the inner wall of the premixing tank 11 is opened on the side wall of the spray coil 21.

[0040] Reference Figure 4 , the spray coil a21a is in a circular shape; refer to Figure 5 The spray coil b21b is in a quasi-circular shape formed by the arc-shaped tubes being close to each other at the head and tail; Figure 6 The spray coil c21c is in a quasi-circular shape with a polygonal structure.

[0041] Reference Figures 4 to 6 The spray coil 21 and the acid inlet riser 22 are connected and communicated through a transverse pipe 24.

[0042] The spray coil 21 is connected and communicated with the acid inlet riser 22 , and the acid inlet riser 22 is connected with a stirring shaft spray pipe 23 for cleaning the stirring shaft 3 , and the acid inlet riser 22 is communicated with the stirring shaft spray pipe 23 .

[0043] Reference Figure 2 and Figure 3 The spray holes 211 are evenly arranged in a circular array with equal spacing and angle on the spray coil 21, so that the sulfuric acid fluid sprayed through the spray coil 21 is more uniform, while avoiding the generation of spray dead corners on the side wall of the premixing tank 11.

[0044] Reference Figure 3 The spray hole 211 is arranged below the outer wall of the acid inlet riser 22 , and the axis of the spray hole 211 points outward and obliquely downward, so that sulfuric acid can be sprayed on the side wall of the premixing tank 11 and wash away the ilmenite powder adhering to the side wall of the premixing tank 11 .

[0045] Reference Figure 3 The inclination angle of the spray hole 211 is 30 to 60 degrees, that is, R is 30 to 60 degrees, for example, 45 degrees.

[0046] Reference Figure 7 , the stirring shaft 3 is placed at the axis center position of the premixing tank 11, and the stirring shaft 3 is located at the center position of the annular or quasi-annular spray coil 21. The stirring shaft 3 is placed vertically. The top of the stirring shaft 3 is connected to a driving motor through a gear set, and the gear set and the driving motor are respectively installed on the upper surface position of the top plate by bolts. A mounting hole is opened at the center position of the top plate, and a sealed bearing is installed in the mounting hole. The stirring shaft 3 is plugged and installed in the sealed bearing; the driving motor can drive the stirring shaft 3 to rotate.

[0047] A stirring claw is fixedly installed at the bottom end of the stirring shaft 3 by bolts; the stirring claw is used to stir the mixture of ilmenite powder and sulfuric acid, so as to mix the ilmenite powder and sulfuric acid evenly.

[0048] Reference Figure 8 The stirring claw includes a blade group, which includes a plurality of stirring blades 31 with different heights. The stirring blades 31 are horizontally arranged along the axial direction of the stirring shaft 3, and the stirring blades 31 are fixedly connected to the stirring shaft 3 (for example, fixedly connected by bolts). The stirring blades 31 on the left and right sides of the stirring shaft 3 are located in asymmetric positions.

[0049] Reference Fig. 9 The stirring claw includes a vertical rod group, which includes a plurality of stirring vertical rods 32 with different eccentric distances. The stirring vertical rods 32 are vertically arranged, and the top ends of the stirring vertical rods 32 are vertically fixedly connected to the stirring cross rods 321 by bolts, and the stirring cross rods 321 are vertically fixedly connected to the stirring shaft 3 by bolts. The stirring vertical rods 32 on the left and right sides of the stirring shaft 3 are located in asymmetric positions.

[0050] Reference Fig.10 The stirring claw includes a stirring blade 31 and a stirring rod 32 which are respectively arranged on the left and right sides of the stirring shaft 3. The stirring blade 31 is horizontally arranged and the stirring rod 32 is vertically arranged; the stirring blade 31 is horizontally arranged and fixedly connected to the stirring shaft 3 (for example, fixedly connected by bolts); the stirring rod 32 is vertically fixedly connected to the stirring cross bar 321 by bolts, and the stirring cross bar 321 is vertically fixedly connected to the stirring shaft 3 by bolts, so that the stirring claw has better stirring quality and efficiency.

[0051] Reference Figure 7 The stirring shaft spray pipe 23 is arranged horizontally, and the opening of the stirring shaft spray pipe 23 points to the stirring shaft 3, so that sulfuric acid is sprayed on the surface of the stirring shaft 3 and the ilmenite powder adhering to the stirring shaft 3 is washed away.

[0052] The stirring shaft spray pipe 23 is horizontally arranged and connected to the middle position of the acid inlet standpipe 22, so that the stirring shaft spray pipe 23 and the acid inlet standpipe 22 are fixedly connected and communicated in a T-shape. The stirring shaft spray pipe 23 and the acid inlet standpipe 22 are connected through a tee.

[0053] The acid inlet standpipe 22 is connected to the top plate of the premixing container 1. The top plate of the premixing container 1 is provided with an acid inlet hole, and the acid inlet standpipe 22 is inserted into the acid inlet hole and sealed and fixed. The acid inlet standpipe 22 is connected to an external sulfuric acid storage container; the hydraulic pump presses the sulfuric acid in the sulfuric acid storage container into the acid inlet standpipe 22.

[0054] Reference Figure 1 The bottom of the side wall of the premixing container 1 is connected to a discharge port 12; the bottom of the premixing tank 11 is provided with an inclined bottom surface 13. The mixed sulfuric acid and ilmenite powder mixture is discharged from the discharge port 12 of the utility model.

[0055] Reference Figure 2 The spray coil 21 is fixedly connected to the bottom surface of the top plate of the premixing container 1 by a pipe clamp, and the pipe clamp is arranged at equal intervals along the axial direction of the spray coil 21 to achieve stable pulling and fixing installation of the spray coil 21, thereby preventing the weight of the spray coil 21 from being concentrated on the acid inlet riser 22, causing the acid inlet riser 22 to be overloaded and damaged.

[0056] Reference Figure 7 The acid inlet riser 22 is arranged at one side of the stirring shaft 3, and the stirring shaft spray pipe 23 points to the top of the stirring shaft 3; since the stirring shaft 3 can rotate, the sulfuric acid sprayed from the stirring shaft spray pipe 23 can completely clean the 360-degree range of the top side wall of the stirring shaft 3 without any dead angle. The middle and lower part of the stirring shaft 3 is in contact with the ilmenite powder and sulfuric acid mixture, and there is no problem of simply bonding the ilmenite powder.

[0057] Reference Fig.11 and Fig.12 The transverse pipe 24 is arranged along the radial direction of the spray coil 21, the distal end of the transverse pipe 24 is connected to the spray coil 21, and the proximal end of the transverse pipe 24 is connected to the inner coil 25 in the shape of a circular ring or a spiral line. The inner coil 25 is arranged coaxially with the spray coil 21, and is sleeved on the outer periphery of the inner coil 25 with the spray coil 21. The bottom surface of the inner coil 25 is provided with a water spraying hole, which is used to make the sulfuric acid flow out vertically, avoiding the problem that the spray coil 21 can only spray the inner wall of the premixing tank 11, thereby making the injection of sulfuric acid more uniform and improving the mixing efficiency of sulfuric acid and mineral powder. The inner coil 25 is flush with the spray coil 21.

[0058] Reference Figure 1 and Fig.10 The bottom end of the stirring shaft 3 is hinged with an adapter rod 33, and a torsion spring is installed at the hinge position. The torsion spring pushes the stirring shaft 3 to rotate downward, so that the bottom surface of the adapter rod 33 is attached to the upper surface of the inclined bottom surface 13. The adapter rod 33 is used to adapt to the inclined bottom surface 13 to avoid a stirring dead angle at the position of the inclined bottom surface 13, thereby improving the uniformity of the final product.

[0059] The utility model has a simple structure and reliable functions. The premixing container 1 is used to contain ilmenite powder and provide space support for mixing ilmenite powder and sulfuric acid. The spray module 2 includes a spray coil 21 and a stirring shaft spray pipe 23 which are respectively connected to the acid inlet riser 22. The sulfuric acid sprayed toward the periphery by the spray coil 21 can wash away the ilmenite powder adhering to the inner wall of the premixing tank 11, and the sulfuric acid sprayed inwardly by the stirring shaft spray pipe 23 can wash away the ilmenite powder adhering to the surface of the stirring shaft 3, which solves the problem of ilmenite powder adhering to the inner wall of the premixing tank 11 and the surface of the stirring shaft 3 in the traditional technology. At the same time, no manual special cleaning is required, the utility model has a high degree of automation, avoids the damage of ilmenite powder and sulfuric acid to the workers' bodies, and has broad market prospects.

[0060] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principle and spirit of the present invention, the changes, modifications, replacements and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. A continuous acid hydrolysis premixing tank acid inlet device, characterized in that: It comprises a premixing container (1) and a spray module (2); the premixing container (1) is a shell-shaped structure, and the inner cavity of the premixing container (1) is a premixing tank (11) for mixing sulfuric acid and ilmenite powder; The spray module (2) is fixedly installed at the top of the premixing tank (11); The spray module (2) comprises a spray coil (21) in a circular or quasi-circular shape, and a spray hole (211) pointing towards the inner wall of the premixing tank (11) is formed on a side wall of the spray coil (21); The spray coil (21) is connected to and communicates with an acid inlet riser (22), the acid inlet riser (22) is connected to a stirring shaft spray pipe (23) for cleaning the stirring shaft (3), and the acid inlet riser (22) is communicated with the stirring shaft spray pipe (23).

2. The continuous acid hydrolysis premixing tank acid inlet device according to claim 1, characterized in that: The spray hole (211) is arranged below the outer wall of the acid inlet riser (22).

3. The continuous acid hydrolysis premixing tank acid inlet device according to claim 2, characterized in that: The axis of the spray hole (211) points outward and obliquely downward.

4. The continuous acid hydrolysis premixing tank acid inlet device according to claim 3, characterized in that: The spray hole (211) has an inclination angle of 30 to 60 degrees.

5. The continuous acid hydrolysis premixing tank acid inlet device according to claim 4, characterized in that: The stirring shaft (3) is placed at the axis center of the premixing tank (11); the stirring shaft (3) is placed upright.

6. The continuous acid hydrolysis premixing tank acid inlet device according to claim 5, characterized in that: A stirring claw is installed at the bottom end of the stirring shaft (3).

7. The continuous acid hydrolysis premixing tank acid inlet device according to claim 6, characterized in that: The stirring shaft spray pipe (23) is arranged horizontally.

8. The continuous acid hydrolysis premixing tank acid inlet device according to claim 7, characterized in that: The stirring shaft spray pipe (23) is arranged transversely and connected to the middle position of the acid inlet riser (22).

9. The continuous acid hydrolysis premixing tank acid inlet device according to claim 8, characterized in that: The acid inlet riser (22) is connected to the top plate of the premixing container (1) through penetration.

10. The continuous acid hydrolysis premixing tank acid inlet device according to claim 9, characterized in that: The bottom of the side wall of the premixing container (1) is connected to a discharge port (12); the bottom of the premixing tank (11) is provided with an inclined bottom surface (13).

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