Titanium dioxide acidolysis filtering device

Abstract

The utility model relates to a titanium dioxide acidolysis filtering device which is characterized in that a first flange (2) is arranged at the bottom end of an acidolysis pot (1), a second flange (4) used for reinforcing is arranged at the upper end of a filter (3), the second flange (4) is fixedly connected with the first flange (2) through bolts, a filtering sieve plate (31) is embedded in the upper portion of the filter (3), and a discharging pipe (5) is arranged on one side of the lower portion of the filter (3). The main body of the filter (3) is in the shape of an inverted circular truncated cone, and the filter sieve plate (31), the third flange (6) and the filter (3) are integrally cast and formed. The problem of vibration deviation occurring in the compressed air feeding and discharging process is solved, and holes of the filtering sieve plate are not prone to being blocked. When the filter sieve plate needs to be cleaned, the filter is disassembled outside the acidolysis pot, the discharging pipeline is cleaned together, the disassembly and assembly are convenient, the hidden danger that personnel fall or suffocate from a high place is avoided, and the continuous and stable operation of production is ensured.

Description

Technical Field

[0001] The utility model relates to the field of titanium dioxide production equipment, in particular to a titanium dioxide acid hydrolysis and filtration device. Background Art

[0002] In the production process of sulfuric acid process titanium dioxide, an acid hydrolysis kettle is used to decompose ilmenite with sulfuric acid. Along with intense chemical reactions, during the whole process from acid ore mixing, acid ore reaction, leaching to iron addition reduction and discharging, compressed air, water, steam, etc. also need to be added to the acid hydrolysis kettle. The upper part of the acid hydrolysis kettle is a steel cylinder structure, and the lower part is an inverted cone structure. A crosshead filter is connected by a flange at the lower part of the conical cylinder. The crosshead filter is both the pressure-bearing equipment at the lowest part of the acid hydrolysis kettle and the channel for discharging materials, entering compressed air, water and steam.

[0003] In the prior art, the structure of the crosshead filter is a small cylindrical barrel made of carbon steel, lined with rubber, fiberglass and bricks in sequence inside, and a graphite sieve filter plate is installed at the upper part of the barrel. This structure has the following defects: First, for the cylindrical filter, when discharging materials, the gravity of the upper materials generates a large pressure when flowing downward, affecting the discharge flow rate and stability. Second, the graphite sieve plate and the barrel are two components fixed together. There is a shaking phenomenon during operation, causing the graphite sieve filter plate to shift, resulting in different flow rates through each sieve hole of the sieve plate. The holes with more flow are prone to blockage, and lining bricks may also fall off. Third, the acid hydrolysis kettle is relatively high and has a certain temperature. When the graphite sieve plate is blocked, there are potential risks of falling from a height and suffocation when personnel enter the kettle for cleaning. The cleaning takes a long time and affects production. Summary of the Utility Model

[0004] The purpose of the utility model is to avoid the defects of the prior art and provide a titanium dioxide acid hydrolysis and filtration device.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A titanium dioxide acid hydrolysis and filtration device, characterized in that: a first flange is provided at the bottom end of the acid hydrolysis kettle, and a second flange for reinforcement is provided at the upper end of the filter. The second flange is fixedly connected to the first flange with bolts. A filter sieve plate is embedded in the upper part of the filter, and a discharge pipe is provided on one side of the lower part of the filter.

[0006] The main body shape of the filter is an inverted frustum.

[0007] The filter sieve plate is 0.9 - 1.2 cm higher than the end face of the second flange; the filter sieve plate is radially equally divided into multiple concentric circles with the center of the circle as the center, and a number of holes are evenly distributed on each circumference, and the diameter of the holes is 0.9 - 1.1 cm.

[0008] A third flange is provided at the pipe orifice of the discharge pipe. The filter sieve plate and the third flange are integrally cast with the filter, and the material is austenitic stainless steel.

[0009] A rubber gasket is installed between the second flange and the first flange.

[0010] The second flange is equally divided into eight reinforcing ribs centered on the center of the circle. Threaded holes are provided on the second flange for connecting to the first flange at the bottom end of the acid digestion pot.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. The filter, the filter sieve plate therein and the discharge pipe are integrally cast, solving the problem of vibration deviation during the introduction of compressed air and the discharging process, and the holes of the filter sieve plate are not easily blocked.

[0013] 2. A filter in the shape of an inverted frustum is designed, and there is a certain buffer slope for discharging, dispersing the downward direct pressure generated by a part of the liquid, enabling it to flow rapidly in the opening direction, and the discharging is more smooth and stable.

[0014] 3. When the filter sieve plate needs to be cleaned, the filter is disassembled outside the acid digestion pot, and the discharge pipeline is also cleaned together. The disassembly and assembly are convenient, avoiding the hidden danger of personnel falling from a height or suffocation, and ensuring the continuous and stable operation of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the present utility model;

[0016] Figure 2 is a top view of the filter sieve plate of the present utility model.

[0017] In the figure: 1 - acid digestion pot, 2 - first flange, 3 - filter, 31 - filter sieve plate, 32 - holes, 4 - second flange, 5 - discharge pipe, 6 - third flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the present utility model with reference to the accompanying drawings:

[0019] See Figure 1-2 , a titanium dioxide acid digestion and filtration device, characterized in that: a first flange 2 is provided at the bottom end of the acid digestion pot 1, a second flange 4 for reinforcement is provided at the upper end of the filter 3, the second flange 4 and the first flange 2 are fixedly connected by bolts, and a rubber gasket is installed between the second flange 4 and the first flange 2. The upper part of the filter 3 is embedded with a filter sieve plate 31, and a discharge pipe 5 is provided on one side of the lower part of the filter 3. A third flange 6 is provided at the pipe orifice of the discharge pipe 5, and the filter sieve plate 31 and the third flange 6 are integrally cast with the filter 3, and the material is austenitic stainless steel.

[0020] The main body shape of the filter 3 is an inverted frustum.

[0021] The filter sieve plate 31 is 0.9 - 1.2 cm higher than the end face of the second flange 4, and the protruding part extends to the center of the first flange 2; the filter sieve plate 31 is radially equally divided into a plurality of concentric circles centered on the center of the circle, and a number of holes 32 are evenly distributed on each circumference, and the diameter of the holes 32 is 0.9 - 1.1 cm.

[0022] The second flange 4 is equally divided into eight reinforced ribs centered on the center of the circle, and threaded holes are provided on the second flange 4 for connecting with the first flange 2 at the bottom end of the acid digestion pot 1.

[0023] The above embodiments are only the preferred embodiments of the present invention, and do not limit the technical solutions of the present invention. Any technical solutions that can be achieved on the basis of the above embodiments without creative labor shall be regarded as falling within the scope of the protection of the rights of the present invention.

Claims

1. A titanium dioxide acid digestion and filtration device, characterized in that: The bottom end of the acid hydrolysis kettle (1) is provided with a first flange (2), and the upper end of the filter (3) is provided with a second flange (4) for reinforcement. The second flange (4) is fixedly connected to the first flange (2) with bolts. The upper part of the filter (3) is embedded with a filter sieve plate (31), and one side of the lower part of the filter (3) is provided with a discharge pipe (5); the main body shape of the filter (3) is an inverted frustum; the pipe orifice of the discharge pipe (5) is provided with a third flange (6), and the filter sieve plate (31) and the third flange (6) are integrally cast with the filter (3), and the material is austenitic stainless steel.

2. The titanium dioxide acidolysis filtration device according to claim 1, characterized in that: The filter sieve plate (31) is 0.9 - 1.2 cm higher than the end face of the second flange (4); the filter sieve plate (31) is radially equally divided into a plurality of concentric circles with the center of the circle as the center, and a number of holes (32) are evenly distributed on each circumference, and the diameter of the holes (32) is 0.9 - 1.1 cm.

3. The titanium dioxide acidolysis filtration device according to claim 1, characterized in that: A rubber pad is installed between the second flange (4) and the first flange (2).

4. The titanium dioxide acid digestion and filtration device according to claim 1, wherein: The second flange (4) is equally divided into eight reinforcing ribs with the center of the circle as the center, and threaded holes are opened on the second flange (4) for connecting with the first flange (2) at the bottom end of the acid hydrolysis kettle (1).

Images