Ferrous crystallization freezing pot for titanium dioxide production

Abstract

The utility model provides a ferrous crystallization freezing pot for titanium dioxide production, which relates to the technical field of titanium dioxide production devices and comprises a heat exchange pot, a crystallization pot, a cooling coil, a liquid inlet pipe, a liquid outlet pipe, a stirrer and a stirring motor. The crystallization pot is installed in the heat exchange pot, a cooling cavity is formed between the crystallization pot and the heat exchange pot, the cooling coil is installed in the cooling cavity, one end of the liquid inlet pipe and one end of the liquid outlet pipe are fixed in the cooling cavity, and the other ends of the liquid inlet pipe and the liquid outlet pipe are connected with the pump. The stirring motor is installed on the top of the crystallization pot. The stirrer is arranged in the crystallization pot and connected with the power output end of the stirring motor. The problems that ferrous sulfate crystals separated out by an existing freezing pot can remain on a coil pipe, and the ferrous sulfate crystals at the bottom of the pot are prone to precipitation and hardening can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide production equipment, in particular to a ferrous crystal freezing pot for titanium dioxide production. Background Art

[0002] Titanium dioxide is an important inorganic chemical pigment, the main component of which is titanium dioxide. It is used in coatings, inks, papermaking, plastics and rubber, chemical fibers, ceramics and other industries. Titanium dioxide production includes titanium ore crushing, acid hydrolysis, frozen crystallization, concentrated hydrolysis, salt treatment and calcination. Frozen crystallization uses the property that the solubility of ferrous sulfate decreases as the temperature of titanium liquid decreases, so that the titanium liquid is cooled in a freezing pot to precipitate ferrous sulfate crystals and send them through a filter for separation.

[0003] The existing freezing pot evenly installs cooling coils on the inner wall. After the titanium liquid is discharged into the freezing pot, the refrigeration equipment inputs a cooling medium into the cooling coil. The titanium liquid is continuously stirred and heat is exchanged with the cooling coil for cooling. However, the existing freezing pot has the following problems in use: first, the precipitated ferrous sulfate crystals will remain on the coils, which is not only inconvenient to clean but also corrodes the tube body. Second, the paddle stirring structure of the existing freezing pot has poor disturbance to the center and bottom of the titanium liquid. The cooling effect of the titanium liquid at the center is not good. The ferrous sulfate crystals at the bottom of the pot are easy to precipitate and harden, and it is difficult to discharge and filter. Therefore, the present application proposes a ferrous sulfate crystal freezing pot for titanium dioxide production. Utility Model Content

[0004] In order to overcome the problems in the background technology, the utility model provides a ferrous sulfate crystal freezing pot for titanium dioxide production, which solves the problems that ferrous sulfate crystals precipitated from the existing freezing pot will remain on a coil and the ferrous sulfate crystals at the bottom of the pot are easily precipitated and hardened.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A ferrous crystal freezing pot for titanium dioxide production comprises a heat exchange pot, a crystallization pot, a cooling coil, a liquid inlet pipe, a liquid outlet pipe, a stirrer and a stirring motor; the crystallization pot is installed in the heat exchange pot, a cooling cavity is formed between the crystallization pot and the heat exchange pot, the cooling coil is installed in the cooling cavity, one end of the liquid inlet pipe and the liquid outlet pipe are fixed in the cooling cavity and the other end is connected to a pump, the stirring motor is installed on the top of the crystallization pot, and the stirrer is arranged in the crystallization pot and connected to the power output end of the stirring motor.

[0007] Furthermore, the cooling coils are evenly installed on the side walls and the bottom of the heat exchange pot, and the medium input pipe and the medium output pipe of the cooling coils are connected to the refrigeration equipment and the middle tank respectively.

[0008] Furthermore, the agitator includes a stirring shaft, a stirring paddle and a scraper. The stirring shaft is connected to the power output end of the stirring motor, the stirring paddle is installed on the stirring shaft, and the scraper is installed at the bottom of the stirring shaft and connected to the bottom of the crystallization pot.

[0009] Furthermore, the stirring paddle is a frame-type stirring paddle, including an outer stirring frame and an inner stirring frame, the inner stirring frame is smaller than the outer stirring frame, and the inner stirring frame is perpendicular to the outer stirring frame and installed on a stirring shaft in the middle of the outer stirring frame.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The present application is provided with a heat exchange pot and a crystallization pot, and the cooling coil is installed in the cooling cavity between the heat exchange pot and the crystallization pot, which can avoid the problem of ferrous sulfate crystals precipitated from the titanium liquid in the existing freezing pot remaining on the coil after cooling; the present application is provided with a frame-type stirring paddle with a stirring outer frame and a stirring inner frame and a scraper, which can improve the stirring effect and flow rate of the titanium liquid near the wall and center of the freezing pot, enhance the heat transfer effect, and the scraper can maintain the disturbance at the bottom of the pot to avoid crystal precipitation and agglomeration, thereby solving the problem that ferrous sulfate crystals at the bottom of the existing freezing pot are easily precipitated and agglomerated. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in describing the embodiments are described.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cooling coil structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the crystallization pot structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the agitator of the utility model.

[0017] 1-heat exchange pot, 11-cooling chamber, 2-crystallization pot, 3-cooling coil, 31-medium input pipe, 32-medium output pipe, 4-liquid inlet pipe, 5-liquid outlet pipe, 6-stirrer, 61-stirring shaft, 7-stirring motor, 8-stirring paddle, 81-stirring outer frame, 82-stirring inner frame, 9-scraper, 10-refrigeration equipment. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians.

[0019] The utility model discloses a ferrous crystal freezing pot for titanium dioxide production, referring to Figure 1-4 A ferrous crystal freezing pot for titanium dioxide production comprises a heat exchange pot 1, a crystallization pot 2, a cooling coil 3, a liquid inlet pipe 4, a liquid outlet pipe 5, a stirrer 6 and a stirring motor 7; the crystallization pot 2 is installed in the heat exchange pot 1, a cooling chamber 11 is between the crystallization pot 2 and the heat exchange pot 1, the cooling coil 3 is installed in the cooling chamber 11, one end of the liquid inlet pipe 4 and the liquid outlet pipe 5 are fixed in the cooling chamber 11 and the other end is connected to a pump, the stirring motor 7 is installed on the top of the crystallization pot 2, and the stirrer 6 is arranged in the crystallization pot 2 and connected to the power output end of the stirring motor 7.

[0020] The titanium liquid is cooled in the crystallization pot 2, and water or other heat transfer medium can be added to the cooling chamber 11 between the heat exchange pot 1 and the crystallization pot 2 through the liquid inlet pipe 4. The cooling coil 3 can cool the heat transfer medium after the cooling medium is passed through it, and the heat transfer medium then evenly cools the crystallization pot 2. The agitator 6 drives the titanium liquid to flow rapidly under the drive of the stirring motor 7, and can quickly exchange heat and cool down the wall of the crystallization pot 2. The titanium liquid will not directly contact the cooling coil 3, and the crystallization pot 2 is easy to clean and maintain, which solves the problem that ferrous sulfate crystals precipitated from the existing freezing pot will remain on a coil.

[0021] See also Figure 1-4 The cooling coils 3 are evenly installed on the side walls and the bottom of the heat exchange pot 1. The medium input pipe 31 and the medium output pipe 32 of the cooling coils 3 are respectively connected to the refrigeration equipment 10 and the middle tank. The medium input pipe 31 and the medium output pipe 32 can circulate and transport the cooling medium prepared by the refrigeration equipment 10 in a single pipe of a plurality of cooling coils 3 to ensure the refrigeration stability of the crystallization pot 2.

[0022] See also Figure 1-4 The agitator 6 includes a stirring shaft 61, a stirring paddle 8 and a scraper 9. The stirring shaft 61 is connected to the power output end of the stirring motor 7. The stirring paddle 8 is installed on the stirring shaft 61. The scraper 9 is installed at the bottom of the stirring shaft 61 and connected to the bottom of the crystallization pot 2 to maintain the disturbance at the bottom of the pot to avoid crystal precipitation and agglomeration, so as to prevent the ferrous sulfate crystals at the bottom of the pot from easily precipitating and agglomerating.

[0023] See also Figure 1-4 The stirring paddle 8 is a frame-type stirring paddle, including a stirring outer frame 81 and a stirring inner frame 82. The stirring inner frame 82 is smaller than the stirring outer frame 81, and the stirring inner frame 82 is perpendicular to the stirring outer frame 81 and is installed on the stirring shaft 61 in the middle of the stirring outer frame 81, which can improve the stirring effect and flow rate of the titanium liquid near the wall and the center of the freezing pot, and enhance the heat transfer effect.

[0024] Working process:

[0025] Titanium liquid is added into the crystallization pot 2, heat transfer medium is transported into the cooling chamber 11 through the medium input pipe 31, cooling medium is transported to the cooling coil through the refrigeration equipment 10 to cool the heat transfer medium, the stirring motor 7 is started, and the stirring shaft 61 drives the stirring outer frame 81, the stirring inner frame 82 and the scraper 9 to rotate. The stirring outer frame 81 and the stirring inner frame 82 make the titanium liquid flow quickly and transfer heat and cool down with the wall of the crystallization pot 2, and the scraper 9 continuously disturbs the crystals at the bottom of the pot.

[0026] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ferrous crystal freezing pot for titanium dioxide production, characterized in that: The invention comprises a heat exchange pot (1), a crystallization pot (2), a cooling coil (3), a liquid inlet pipe (4), a liquid outlet pipe (5), a stirrer (6) and a stirring motor (7); the crystallization pot (2) is installed in the heat exchange pot (1); a cooling chamber (11) is provided between the crystallization pot (2) and the heat exchange pot (1); the cooling coil (3) is installed in the cooling chamber (11); one end of the liquid inlet pipe (4) and the liquid outlet pipe (5) are fixed in the cooling chamber (11) and the other end is connected to a pump; the stirring motor (7) is installed on the top of the crystallization pot (2); and the stirrer (6) is arranged in the crystallization pot (2) and connected to the power output end of the stirring motor (7).

2. The ferrous crystal freezing pot for producing titanium dioxide according to claim 1, characterized in that: The cooling coils (3) are evenly installed on the side walls and bottom of the heat exchange pot (1), and the medium input pipe (31) and the medium output pipe (32) of the cooling coils (3) are connected to the refrigeration equipment and the intermediate tank respectively.

3. The ferrous crystal freezing pot for producing titanium dioxide according to claim 1, characterized in that: The stirrer (6) comprises a stirring shaft (61), a stirring paddle (8) and a scraper (9); the stirring shaft (61) is connected to the power output end of the stirring motor (7); the stirring paddle (8) is mounted on the stirring shaft (61); and the scraper (9) is mounted on the bottom of the stirring shaft (61) and connected to the bottom of the crystallization pot (2).

4. The ferrous crystal freezing pot for producing titanium dioxide according to claim 3, characterized in that: The stirring paddle (8) is a frame-type stirring paddle, comprising an outer stirring frame (81) and an inner stirring frame (82); the inner stirring frame (82) is smaller than the outer stirring frame (81), and the inner stirring frame (82) is perpendicular to the outer stirring frame (81) and is mounted on a stirring shaft (61) in the middle of the outer stirring frame (81).

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