Cleaning device for freezing crystallization pot for titanium dioxide production

Abstract

The utility model relates to a titanium dioxide production freezing crystallization pot cleaning device which is characterized in that an operation platform supported by a #-shaped frame is arranged on a freezing pot, a portal frame is arranged on the operation platform, a lifting mechanism is arranged in the portal frame, a vertical water inlet pipe is fixed on the lifting mechanism, and the upper end of the water inlet pipe is connected with a hose. The lower end of the water inlet pipe is vertically connected with an annular pipe, the annular pipe is located on the upper portion in the freezing pot, three evenly-distributed spray heads are connected to the annular pipe, and the annular pipe is driven by a lifting mechanism to move up and down in the freezing pot to wash the cooling coil pipe. The structure is simple and reasonable and easy to control and operate. After each batch of crystals in the freezing pot are discharged, the motor is started, the lifting mechanism moves up and down, and the 120-degree fan-shaped spray head is matched, so that ferrous iron attached to the coil pipe can be completely cleaned, and the heat exchange effect is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production equipment technology, specifically relating to a cleaning device for a frozen crystallization pot in titanium dioxide production. Background Technology

[0002] Currently, in the freeze crystallization process of titanium dioxide production, molten black titanium enters the freeze crystallization pot via a feed pump. After being cooled sequentially by cooling water to crystallize and precipitate ferrous sulfate, the molten titanium is transferred to a crystallization tank. It is then pumped onto a disc filter for solid-liquid separation to obtain the desired titanium solution. During the freezing stage, the freeze pot is cooled sequentially through primary, secondary, and tertiary cooling pipelines. As the temperature of the molten black titanium in the freeze pot continuously decreases with water replacement, a large amount of ferrous sulfate crystals precipitate. Ferrous sulfate easily adheres and accumulates on the cooling coils. Continuous cooling causes the precipitated ferrous sulfate to rapidly accumulate on the coils, leading to a significant buildup. Without timely cleaning of the coils during continuous batch freezing operations, the freeze heat exchange efficiency is severely affected, impacting normal production. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cleaning device for a frozen crystallization pot in titanium dioxide production.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cleaning device for a frozen crystallization pot in titanium dioxide production, wherein a cooling coil is provided on the inner wall of the frozen pot, and a stirrer is provided inside the frozen pot. The device is characterized in that: an operating platform supported by a grid frame is provided on the frozen pot, a gantry frame is provided on the operating platform, a lifting mechanism is provided inside the gantry frame, a vertical water inlet pipe is fixed on the lifting mechanism, a flexible hose is connected to the upper end of the water inlet pipe, the flexible hose is connected to a production water pipe, and an annular pipe is vertically connected to the lower end of the water inlet pipe. The annular pipe is located in the upper part of the frozen pot, and three evenly distributed nozzles are connected to the annular pipe. The annular pipe is driven by the lifting mechanism to move up and down inside the frozen pot to rinse the cooling coil.

[0005] The lifting mechanism includes a movable frame; both sides of the gantry frame are equipped with chain drive mechanisms, which are connected by chains meshing with sprockets at the upper and lower ends of the gantry frame columns. A motor provides power to the two coaxial sprockets at the upper end through a reduction gearbox, which is fixed to one side of the upper end of the gantry frame. Connecting components are fixed on the chain, and a movable frame is provided between the two connecting components. The movable frame is fixed to the connecting components on both sides by connecting blocks. The rotation of the motor drives the chain drive mechanism, thereby driving the movable frame to move up and down.

[0006] The connecting assembly includes a sliding block, which is disposed inside the gantry column. A middle plate is fixed to the middle of one side surface of the sliding block facing the moving frame. Side plates are provided on both sides of the middle plate, and the side plates are also fixed to the sliding block. The sliding block together with the side plates is slidably connected to the inside of the gantry column.

[0007] The sliding block has an upper limit plate at the top and a lower limit plate at the bottom. Both the upper and lower limit plates have grooves in the middle. One side of each plate is fixed to the sliding block, and the other side of the upper limit plate has an upper nut and the other side of the lower limit plate has a lower nut. The first end of the chain is fixed to the upper nut with a bolt, then engages with the upper sprocket, passes through the two grooves in sequence, and then engages with the lower sprocket. The end of the chain is fixed to the lower nut with a bolt. The sprocket rotates, causing the sliding block, which is fixed by the upper and lower limit plates, to move up and down.

[0008] The upper and lower parts of the front of the gantry column are equipped with probes that are interlocked with the control system; the lifting mechanism is equipped with limit sensor plates.

[0009] The limiting sensor is mounted on the side plate.

[0010] The nozzle is a 120° fan-shaped nozzle.

[0011] The length of the water inlet pipe is approximately equal to the height of the freezer.

[0012] The mobile frame is equipped with clips for securing the water inlet pipe.

[0013] The beneficial effects of this invention are: simple and reasonable structure, easy to control and operate. After each batch of crystallization material is discharged from the freezing pot, the motor is started, the lifting mechanism moves up and down, and is equipped with a 120° fan-shaped nozzle to thoroughly clean the ferrous iron adhering to the coils, ensuring heat exchange efficiency; the cleaning water pipe is connected to the nozzle with a high-pressure hose to avoid damage to the pipeline caused by up and down movement. This improves work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the lifting mechanism of this utility model;

[0016] Figure 3 for Figure 2 AA view;

[0017] Figure 4 for Figure 3 BB cross-sectional view;

[0018] Figure 5 for Figure 4 CC section view;

[0019] In the diagram: 1-Freezing pot, 2-Cooling coil, 3-Operating platform, 4-Gantry frame, 5-Lifting mechanism, 51-Motor, 52-Sprocket, 53-Chain, 54-Moving frame, 55-Connecting block, 56-Connecting assembly, 561-Side plate, 562-Middle plate, 563-Sliding block, 564-Limiting plate, 565-Groove, 56a-Upper limiting plate, 56b-Lower limiting plate, 56c-Upper nut, 56d-Lower nut, 6-Water inlet pipe, 7-Hose, 8-Annular pipe, 9-Nozzle, 10-Probe, 11-Limiting sensor plate, 12-Clip. Detailed Implementation

[0020] See Figure 1-5 A device for cleaning the coils of a frozen crystallization pot in titanium dioxide production is disclosed. The frozen pot 1 has a cooling coil 2 on its inner wall and a stirrer inside. The device is characterized by: an operating platform 3 supported by a grid frame on the frozen pot 1; a gantry frame 4 on the operating platform 3; a lifting mechanism 5 inside the gantry frame 4; a vertical water inlet pipe 6 fixed on the lifting mechanism 5; a flexible hose 7 connected to the upper end of the water inlet pipe 6; the flexible hose 7 connected to a production water pipe; and a vertically connected annular pipe 8 at the lower end of the water inlet pipe 6. The annular pipe 8 is located in the upper part of the frozen pot 1 and has three evenly distributed nozzles 9 connected to it. The annular pipe 8 is moved up and down inside the frozen pot 1 by the lifting mechanism 5 to rinse the cooling coil 2.

[0021] The lifting mechanism 5 includes a movable frame 54; both sides of the gantry frame 4 are equipped with chain drive mechanisms, which are connected by chains 53 and sprockets 52 at the upper and lower ends of the columns of the gantry frame 4. The motor 51 provides power to the two coaxial sprockets 52 at the upper end through a reduction gearbox, which is fixed to one side of the upper end of the gantry frame 4; a connecting component 56 is fixed on the chain 53, and a movable frame 54 is provided between the two connecting components 56. The movable frame 54 is fixed to the connecting components 56 on both sides through connecting blocks 55; the motor 51 rotates to drive the chain drive mechanism, thereby driving the movable frame 54 to move up and down.

[0022] The connecting component 56 includes a sliding block 563, which is disposed inside the column of the gantry frame 4. A middle plate 562 is fixed to the middle of one side surface of the sliding block 563 facing the moving frame 54. Side plates 561 are provided on both sides of the middle plate 562, and the side plates 561 are also fixed to the sliding block 563. The sliding block 563 together with the side plates 561 is slidably connected to the inside of the column of the gantry frame 4.

[0023] The upper part of the inner cavity of the sliding block 563 is provided with an upper limit plate 56a, and the lower part is provided with a corresponding lower limit plate 56b. The upper limit plate 56a and the lower limit plate 56b are both provided with grooves 565. One side of the upper limit plate 56a and the lower limit plate 56b are fixed to the sliding block 563. The other side of the upper limit plate 56a is provided with an upper nut 56c, and the other side of the lower limit plate 56b is provided with a lower nut 56d. The first end of the chain 53 is fixed to the upper nut 56c by bolts, and then engages with the upper sprocket 52 and passes through the two grooves 565 in sequence. Then it engages with the lower sprocket 52, and the end is fixed to the lower nut 56d by bolts. The sprocket 52 rotates, driving the sliding block 563 fixed by the upper limit plate 56a and the lower limit plate 56b to move up and down.

[0024] The upper and lower parts of the front of the gantry frame 4 column are equipped with probes 10 that are interlocked with the control system; the lifting mechanism 5 is equipped with limit sensor plates 11.

[0025] The limiting sensor 11 is disposed on the side plate 561.

[0026] The nozzle 9 is a 120° fan-shaped nozzle.

[0027] The length of the water inlet pipe 6 is approximately equal to the height of the freezer 1.

[0028] The movable frame 54 is equipped with a clip 12 for fixing the water inlet pipe 6.

[0029] Working process: After the freezing pot 1 finishes discharging, close the discharge pneumatic valve at the bottom of the freezing pot 1, open the manual valve of the production water pipe, start the motor 51 to rotate forward, and the chain drive mechanism drives the moving frame 54 to descend, causing the nozzles 9 on the annular pipe 8 to move down as a whole to clean the cooling coil 2, until the probe 10 at the bottom of the gantry 4 column senses the limit sensor 11, the control system controls the motor 51 to reverse, and the lifting mechanism 5 rises to the point where the probe 10 at the top of the gantry 4 column senses the limit sensor 11, the control system controls the motor 51 to reverse, completing one cycle of cleaning. Repeat this process until the coil is clean, then turn on the agitator to stir until the crystals dissolve, open the discharge pneumatic valve at the bottom of the freezing pot 1, and discharge the ferrous sulfate solution and fine crystals that have been cleaned.

[0030] It should be noted that the speed of motor 51 can be adjusted as needed. In the initial stage of cleaning, the moving speed is slow so that all the ferrous iron deposits on the entire coil are softened by water, preventing the ferrous iron from sticking to the coil. After the designed time is reached, the speed of motor 51 is increased so that the flushing water can more effectively wash away all the ferrous iron.

Claims

1. A titanium dioxide production freeze crystallizer pot cleaning device, the inner wall of the freeze pot (1) is provided with a cooling coil (2), and the freeze pot (1) is provided with a stirrer, characterized in that: The operation platform (3) is provided with a gantry (4), the gantry (4) is internally provided with a lifting mechanism (5), a vertical water inlet pipe (6) is fixed on the lifting mechanism (5), the upper end of the water inlet pipe (6) is connected with a hose (7), the hose (7) is connected with a self-produced water pipe, the lower end of the water inlet pipe (6) is connected with a ring-shaped pipe (8) perpendicularly, the ring-shaped pipe (8) is located at the upper part in the freezing pot (1), the ring-shaped pipe (8) is connected with three evenly distributed spray heads (9), and the ring-shaped pipe (8) is driven by the lifting mechanism (5) to move up and down in the freezing pot (1) to flush the cooling coil (2).

2. A titanium dioxide production freeze crystallizer tank cleaning apparatus as claimed in claim 1, characterized in that: The lifting mechanism (5) comprises a moving frame (54); chain transmission mechanisms are arranged in the two side columns of the gantry (4), the chain transmission mechanisms are connected with the sprockets (52) arranged at the upper and lower ends of the columns of the gantry (4) through chains (53), a motor (51) provides power for the two coaxial sprockets (52) at the upper end through a speed reducer, and the speed reducer is fixed on one side of the upper end of the gantry (4); the chains (53) are fixedly connected with connecting assemblies (56), the moving frame (54) is arranged between the two connecting assemblies (56), and the moving frame (54) is fixed on the connecting assemblies (56) through connecting blocks (55) on the two sides.

3. A titanium dioxide production freeze crystallizer tank cleaning apparatus as defined in claim 2, wherein: The connecting assembly (56) comprises a sliding block (563), the sliding block (563) is arranged in the column of the gantry (4), a middle plate (562) is fixed to the middle of the surface of one side of the sliding block (563), side plates (561) are arranged on the two sides of the middle plate (562), and the side plates (561) are also fixed to the sliding block (563). The inner cavity of the sliding block (563) is provided with an upper limiting plate (56a) at the upper part and a lower limiting plate (56b) at the lower part, grooves (565) are arranged in the middle of the upper limiting plate (56a) and the lower limiting plate (56b), one side of the upper limiting plate (56a) and the lower limiting plate (56b) is fixed to the sliding block (563), the other side of the upper limiting plate (56a) is provided with an upper nut (56c), the other side of the lower limiting plate (56b) is provided with a lower nut (56d), the chain (53) is fixed to the upper nut (56c) through a bolt, is connected with the upper sprocket (52) in sequence after being connected, then passes through the two grooves (565) in sequence, and is connected with the lower sprocket (52), and the tail end is fixed to the lower nut (56d) through a bolt; the sprocket (52) rotates, and drives the sliding block (563) fixed by the upper limiting plate (56a) and the lower limiting plate (56b) to move up and down.

4. A titanium dioxide production freeze crystallizer tank cleaning apparatus as defined in claim 1, wherein: The columns of the gantry (4) are provided with probes (10) on the front surfaces of the upper parts and the lower parts and are interlocked with a control system; the lifting mechanism (5) is provided with a limiting induction sheet (11).

5. A titanium dioxide production freeze crystallizer tank cleaning apparatus as defined in claim 4, wherein: The limiting induction sheet (11) is arranged on the side plate (561).

6. A titanium dioxide production freeze crystallizer tank cleaning apparatus as defined in claim 1, wherein: The spray head (9) is a 120° sector-shaped spray head.

7. A titanium dioxide production freeze crystallizer tank cleaning apparatus as defined in claim 1, wherein: The length of the water inlet pipe (6) is equivalent to the height of the freezing pot (1).

8. A titanium dioxide production freeze crystallizer tank cleaning apparatus as defined in claim 2, wherein: The moving frame (54) is provided with a clamping piece (12) for fixing the water inlet pipe (6).

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