Freezing pot capable of cleaning crystals

Abstract

The utility model discloses a freezing pot capable of cleaning crystals. The freezing pot comprises a pot body, the spiral coil pipe is spirally arranged in the pot body around the axis of the pot body, and the spiral coil pipe is provided with an inlet end and an outlet end. After titanium liquid is cooled to a preset temperature for discharging, the temperature in the spiral coil pipe is rapidly increased by opening a valve on a steam inlet pipe, so that the titanium liquid is cooled to the preset temperature; meanwhile, the circularly flowing steam can effectively clean scale attached to the inner wall of the spiral coil pipe, and it is guaranteed that the spiral coil pipe is at the highest heat exchange efficiency when the titanium liquid is cooled; and the spraying water nozzle on the cleaning piece uses recycled hot water to wash the spiral coil pipe, and ferrous crystals melted after steam heating are cleaned up, so that the cooling speed of the titanium liquid is increased, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide preparation, in particular to a freezing pot capable of cleaning crystals. Background Art

[0002] In the production process of preparing titanium dioxide by the sulfuric acid method, ferrous ions need to be removed from the titanium liquid. Generally, the hot titanium liquid is transported to a freezing pot, and the titanium liquid is cooled and crystallized by ice water in a spiral coil, so that the ferrous ions are precipitated in the form of ferrous sulfate heptahydrate crystals (green vitriol). The ferrous sulfate crystals are then separated from the titanium liquid by vacuum filtration, thereby obtaining a titanium liquid with a lower iron content.

[0003] In the freezing pot, because ferrous sulfate crystallizes and forms agglomerates on the spiral coils, it is necessary to regularly clean the crystals. Otherwise, the thick crystal layer will hinder the contact between the titanium liquid and the spiral coils, significantly reducing the heat exchange effect and prolonging the freezing cycle. To address this problem, the spiral coils are generally manually rinsed with hot water to remove the crystals attached to the spiral coils. This is time-consuming, and the thick crystal layer is often difficult to rinse away, which reduces the cooling rate of the titanium liquid and affects production efficiency. Utility Model Content

[0004] The present invention aims to solve the problems existing in the prior art and provides the following technical solutions:

[0005] A freezing pot capable of cleaning crystals, comprising:

[0006] pot body;

[0007] a spiral coil, spirally arranged in the pot body around the axis of the pot body, the spiral coil having an inlet end and an outlet end, the inlet end and the outlet end both passing through the top of the pot body and extending to the outside of the pot body, the inlet end being connected to a cooling water inlet pipe, an ice water inlet pipe, and a steam inlet pipe, and the outlet end being connected to a cooling water outlet pipe, an ice water outlet pipe, and a steam outlet pipe;

[0008] A hot water barrel, wherein the water inlet of the hot water barrel is connected to the cooling water outlet pipe and the steam outlet pipe;

[0009] The cleaning part includes a cleaning water pipe mounted above the spiral coil and coaxially arranged with the spiral coil, the cleaning water pipe is connected to the water outlet of the hot water bucket through a hot water inlet pipe, and a plurality of groups of spray nozzles are arranged on the cleaning water pipe, and the water outlets of the spray nozzles are facing the spiral coil.

[0010] As an improvement of the above technical solution, two groups of cleaning water pipes are provided, wherein the distance between the cleaning water pipes and the axis in one group is greater than the distance between the spiral coil and the axis, and the distance between the cleaning water pipes and the axis in the other group is smaller than the distance between the spiral coil and the axis.

[0011] As an improvement of the above technical solution, the spray nozzles are arranged at intervals on the cleaning water pipe, and the distance between two adjacent groups of the spray nozzles is 1m.

[0012] As an improvement to the above technical solution, the spray nozzles on the two groups of cleaning water pipes are staggered by 0.5m.

[0013] As an improvement of the above technical solution, it also includes a stirring device, which is installed in the pot body.

[0014] Beneficial effects of the utility model:

[0015] After the titanium liquid is cooled to the preset temperature and discharged, the temperature inside the spiral coil is rapidly increased by opening the valve on the steam inlet pipe, thereby melting the ferrous crystals attached to the outer wall of the spiral coil. At the same time, the circulating steam can also effectively clean the scale attached to the inner wall of the spiral coil. The spray nozzle on the cleaning water pipe uses recycled hot water to flush the spiral coil, and cleans the ferrous crystals melted by steam heating, ensuring that the spiral coil is at the highest heat exchange efficiency when the titanium liquid is cooled; thereby increasing the cooling rate of the titanium liquid and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main view of the overall structure of the utility model;

[0017] Figure 2 It is a top view of the overall structure of the utility model;

[0018] Figure 3 This is a schematic structural diagram of a hot water barrel of the present utility model.

[0019] Figure numerals: 1. pot body; 2. spiral coil; 21. cooling water inlet pipe; 22. ice water inlet pipe; 23. steam inlet pipe; 24. cooling water outlet pipe; 25. ice water outlet pipe; 26. steam outlet pipe; 3. stirring device; 4. cleaning part; 41. cleaning water pipe; 42. spray nozzle; 43. hot water inlet pipe; 5. hot water bucket. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] A freezing pot capable of cleaning crystals, comprising: a pot body 1; a spiral coil 2, spirally arranged in the pot body 1 around the axis of the pot body 1, the spiral coil 2 having an inlet end and an outlet end, the inlet end and the outlet end both passing through the top of the pot body 1 and extending to the outside of the pot body 1, the inlet end being connected to a cooling water inlet pipe 21, an ice water inlet pipe 22, and a steam inlet pipe 23, and the outlet end being connected to a cooling water outlet pipe 24, an ice water outlet pipe 25, and a steam outlet pipe 26; a hot water tank 5, the water inlet of the hot water tank 5 being connected to the cooling water outlet pipe 24 and the steam outlet pipe 26;

[0022] The cleaning part 4 includes a cleaning water pipe 41 mounted above the spiral coil 2 and coaxially arranged with the spiral coil 2. The cleaning water pipe 41 is connected to the water outlet of the hot water bucket 5 through a hot water inlet pipe 43. A plurality of groups of spray nozzles 42 are provided on the cleaning water pipe 41, and the water outlet of the spray nozzle 42 faces the spiral coil 2.

[0023] The titanium liquid is fed to the specified liquid level and the stirring device 3 is turned on. The valve on the cooling water inlet pipe 21 is opened first, and the cooling water enters the spiral coil 2. The cooling water in the spiral coil 2 cools the titanium liquid in the pot body 1. The hot water generated after heat exchange is collected to the hot water bucket 5 through the cooling water outlet pipe 24. The water in the hot water bucket 5 is used as the water source for cleaning the parts 4; when the cooling water cannot cool the titanium liquid, the cooling water inlet and outlet valves are closed, and the valve on the ice water inlet pipe 22 is opened, and the ice water enters the spiral coil 2. The ice water in the spiral coil 2 continues to cool the titanium liquid in the pot body 1. The water after heat exchange returns to the ice machine through the ice water outlet pipe 25 to cool down again for recycling. After the titanium liquid drops to the preset temperature in the pot body 1, it is discharged from the bottom of the pot body 1. After the discharge, the ice water inlet pipe 22 and the ice water are closed. The valve on the outlet pipe 25 opens the valve on the steam inlet pipe 23, and the steam enters the spiral coil 2 from the steam inlet pipe 23, heating the spiral coil 2, so that the temperature inside the spiral coil 2 rises rapidly, thereby melting the ferrous crystals attached to the outer wall of the spiral coil 2. At the same time, the circulating steam can also effectively clean the scale attached to the inner wall of the spiral coil 2. After cooling, the condensed water is discharged from the steam outlet pipe 26 into the hot water barrel, thereby improving the heat recovery efficiency. After the spiral coil 2 is heated for 15-20 minutes, the valve on the hot water inlet pipe 43 in the cleaning part 4 is opened, and the water in the hot water barrel 5 is transported to the cleaning water pipe 41 through a pump, and sprayed out through the spray nozzle 42 to rinse the melted crystals on the spiral coil 2. The pot body 1 is a structure with a cylindrical main body and a conical bottom.

[0024] In order to clean both the outside and inside of the spiral coil 2, refer to Figure 2There are two groups of cleaning water pipes 41, one of which has a larger distance between the cleaning water pipes 41 and the axis than the distance between the spiral coil 2 and the axis, and the other has a smaller distance between the cleaning water pipes 41 and the axis than the distance between the spiral coil 2 and the axis. The two groups of cleaning water pipes 41 are arranged in concentric circles, and the spiral coil 2 is flushed from two directions respectively to reduce the cleaning dead angle. The cleaning water pipes 41 are installed above the spiral coil 2, and the hot water inlet pipe 43 is connected to the water outlet of the hot water bucket 5. The hot water in the hot water bucket 5 enters the cleaning water pipe 41 through the hot water inlet pipe 43 and is transported to the spray nozzle 42 by the cleaning water pipe 41, so that the water sprayed from the spray nozzle 42 can flow down from the top of the spiral coil 2, and the spiral coil 2 is cleaned layer by layer from top to bottom.

[0025] In one embodiment, reference Figure 1 as well as Figure 2 The spray nozzles 42 are arranged at intervals on the cleaning water pipe 41. The spacing between two adjacent groups of the spray nozzles 42 is 1 meter. The spray nozzles on the two groups of the cleaning water pipes 41 are staggered by 0.5m to improve the spray coverage rate. The spray nozzles 42 use pressurized nozzles, and the water outlet should be conical to ensure the spraying effect.

[0026] In one embodiment only, reference Figure 1 , and also includes a stirring device 3, which is installed in the pot body 1 and driven by a motor to drive a stirring paddle to prevent crystals from being deposited at the bottom of the pot body 1 during the freezing process.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A freezing pot capable of cleaning crystals, characterized in that: include: Pot body (1); A spiral coil (2) is spirally arranged in the pot body (1) around the axis of the pot body (1), and the spiral coil (2) has an inlet end and an outlet end, and the inlet end and the outlet end both pass through the top of the pot body (1) and extend to the outside of the pot body (1), the inlet end is connected to a cooling water inlet pipe (21), an ice water inlet pipe (22) and a steam inlet pipe (23), and the outlet end is connected to a cooling water outlet pipe (24), an ice water outlet pipe (25) and a steam outlet pipe (26); A hot water barrel (5), wherein the water inlet of the hot water barrel (5) is connected to a cooling water outlet pipe (24) and a steam outlet pipe (26); A cleaning component (4), the cleaning component (4) comprising a cleaning water pipe (41) mounted above the spiral coil (2) and coaxially arranged with the spiral coil (2), the cleaning water pipe (41) being connected to the water outlet of the hot water bucket (5) via a hot water inlet pipe (43), and a plurality of groups of spray nozzles (42) being arranged on the cleaning water pipe (41), the water outlets of the spray nozzles (42) facing the spiral coil (2).

2. A freezing pot capable of cleaning crystals according to claim 1, characterized in that: The cleaning water pipes (41) are provided in two groups, wherein the distance between the cleaning water pipes (41) in one group and the axis is greater than the distance between the spiral coil (2) and the axis, and the distance between the cleaning water pipes (41) in the other group and the axis is less than the distance between the spiral coil (2) and the axis.

3. A freezing pot capable of cleaning crystals according to claim 2, characterized in that: The spray nozzles (42) are arranged at intervals on the cleaning water pipe (41), and the distance between two adjacent groups of the spray nozzles (42) is 1 m.

4. A freezing pot capable of cleaning crystals according to claim 3, characterized in that: The spray nozzles (42) on the two groups of cleaning water pipes (41) are arranged in a staggered manner of 0.5 m.

5. The freezing pot capable of cleaning crystals according to claim 1, characterized in that: It also includes a stirring device (3), which is installed in the pot body (1).

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