Heat exchange device of continuous acidolysis premixing tank

Abstract

The utility model relates to the technical field of heat exchange devices, and provides a continuous acidolysis premixing tank heat exchange device which comprises a premixing tank and a water bath jacket arranged on the peripheral surface of the premixing tank, the bottom of the water bath jacket is connected with a first water inlet, and the top of the water bath jacket is connected with a first water outlet; a cavity baffle is arranged on the inner circumferential surface of the premixing tank, the bottom of the cavity baffle is connected with a water inlet system, the top of the cavity baffle is connected with a water outlet system, and the water outlet system is communicated with the first water outlet of the water bath jacket; the water inlet system and the water bath jacket are both communicated with an external water cooling unit; the internal cavity baffle and the external water bath jacket are used for internal and external dual heat exchange, so that the heat exchange efficiency of the premixing tank is greatly improved, the temperature of the premixing tank is better controlled, and the reaction stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange device technology, and more specifically, to a continuous acidolysis premixing tank heat exchange device. Background Technology

[0002] In the production technology of titanium dioxide by the sulfuric acid process, acidolysis is one of the three traditional core processes, while continuous acidolysis is an emerging production process. The main work of this process is to mix concentrated sulfuric acid with titanium concentrate powder or acid-soluble high titanium slag that has been ball-milled to a certain fineness required by the process, and then carry out an initiation reaction to produce soluble titanium sulfate oxysalt, and further leach it to prepare titanium liquid for use in the next process.

[0003] In recent years, with the improvement of equipment technology and the continuous optimization of production processes, the traditional single-batch intermittent acidolysis technology has gradually shifted to a continuous acidolysis production process using continuous acidolysis units. Before being fed into the continuous acidolysis unit, the titanium concentrate and acid-soluble titanium slag generally need to be thoroughly mixed in a premixing tank. Because the reaction temperature during the mixing of concentrated sulfuric acid and titanium concentrate powder needs to be controlled to prevent it from becoming too high, otherwise, hard solids can easily form, clogging the premixing tank and pipelines, leading to production disruptions, forced shutdowns for cleaning, and material waste. Therefore, it is necessary to add a heat exchange device to the premixing tank to better control its temperature. Utility Model Content

[0004] The purpose of this invention is to provide a heat exchange device for a continuous acidolysis premixing tank, which utilizes an internal cavity baffle and an external water bath jacket for dual internal and external heat exchange, greatly improving the heat exchange efficiency of the premixing tank, better controlling the temperature of the premixing tank, and improving the stability of the reaction.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A continuous acidolysis premixing tank heat exchange device includes a premixing tank and a water bath jacket disposed on the outer periphery of the premixing tank. The bottom of the water bath jacket is connected to a first water inlet, and the top is connected to a first water outlet.

[0007] A cavity baffle is provided on the inner circumference of the premix tank. The bottom of the cavity baffle is connected to a water inlet system and the top is connected to a water outlet system. The water outlet system is connected to the first water outlet of the water bath jacket. Both the water inlet system and the water bath jacket are connected to an external water-cooling unit.

[0008] Furthermore, the water bath jacket is disposed on the outer side and bottom surface of the premixing tank, and is integrally formed.

[0009] Furthermore, the water bath jacket is provided with multiple baffles.

[0010] Furthermore, adjacent baffles are staggered and spaced apart.

[0011] Furthermore, the cavity baffle has a cuboid structure and multiple cavities are provided, with the multiple cavity baffles evenly distributed along the inner circumference of the premixing tank.

[0012] Furthermore, the water inlet system includes a water inlet ring pipe disposed around the water bath jacket, and the water inlet ring pipe is provided with a plurality of second water inlets, one of which is connected to the bottom of the cavity baffle.

[0013] The water outlet system includes multiple second water outlets, which are connected to the first water outlet.

[0014] Furthermore, the water outlet system also includes a water outlet ring pipe, and a plurality of second water outlets are respectively connected to the water outlet ring pipe, and the water outlet ring pipe is connected to the first water outlet through a connecting water pipe.

[0015] Furthermore, the cavity baffle is arranged in a spiral structure around the inner circumferential surface of the premixing tank.

[0016] Furthermore, the second water outlet at the top of the cavity baffle is directly connected to the first water outlet at the top of the water bath jacket.

[0017] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0018] This invention utilizes both the exterior and bottom of the premixing tank, both of which are equipped with water bath jackets. A water-cooling unit prepares cold water at 8-12°C, which is then introduced into the water bath jackets for heat exchange and cooling. This fully utilizes the entire outer surface of the premixing tank, significantly increasing its heat exchange area. Simultaneously, heat exchange is also applied to the interior of the premixing tank by incorporating multiple cavity baffles. These baffles contact the internal liquid, directly increasing the heat exchange area. This dual heat exchange, utilizing both the internal cavity baffles and the external water bath jacket, greatly improves the heat exchange efficiency of the premixing tank, better controls its temperature, and enhances reaction stability. Furthermore, the cavity baffles facilitate more uniform mixing of the materials within the premixing tank, increasing stirring intensity and preventing the sulfuric acid and titanium concentrate mixture from depositing as a solid phase. This further enhances the heat exchange effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the continuous acidolysis premixing tank heat exchange device provided in Embodiment 1 of this utility model;

[0021] Figure 2 This is a cross-sectional view of the heat exchange device of the continuous acidolysis premixing tank provided in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the continuous acidolysis premixing tank heat exchange device provided in Embodiment 2 of this utility model.

[0023] Icons: 1-Premix tank, 2-Water outlet system, 21-Water outlet ring pipe, 22-Second water outlet, 3-First water outlet, 4-Water bath jacket, 5-Baffle plate, 6-Water inlet system, 61-Second water inlet, 62-Water inlet ring pipe, 7-First water outlet, 8-Cavity baffle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Example 1

[0026] A continuous acidolysis premixing tank heat exchange device includes a premixing tank 1 and a water bath jacket 4 disposed on the outer peripheral surface of the premixing tank 1. The bottom of the water bath jacket 4 is connected to a first water inlet and the top is connected to a first water outlet 73.

[0027] A cavity baffle 8 is provided on the inner circumference of the premix tank 1. The bottom of the cavity baffle 8 is connected to a water inlet system 6 and the top is connected to a water outlet system 2. The water outlet system 2 is connected to the first water outlet 73 of the water bath jacket 4. Both the water inlet system 6 and the water bath jacket 4 are connected to an external water-cooling unit.

[0028] Working principle: This utility model utilizes both the exterior and bottom of the premixing tank 1, both of which are designed with water bath jackets 4. Cold water at 8-12℃ is prepared by a water-cooling unit and introduced into the water bath jacket 4 for heat exchange and cooling. This fully utilizes the entire outer surface of the premixing tank 1 and greatly increases the heat exchange area of ​​the premixing tank 1.

[0029] Simultaneously, heat exchange is also performed inside the premixing tank 1. Multiple cavity baffles 8 are installed inside the premixing tank 1, with a height approximately the same as the tank height. The cavity baffles 8 can be 30cm wide and 3cm thick. Water enters from the bottom of the cavity baffles 8 and overflows from the top. Cold water at 8-12℃, prepared by a water-cooling unit, is also introduced into the cavity baffles 8. This increases the heat exchange area by having multiple cavity baffles 8 in contact with the liquid inside the premixing tank 1. The overflow from the top water outlet system 2 of the cavity baffles 8 directly enters the first outlet 73 of the water bath jacket 4 and is discharged from there. This improves the utilization rate of the cold water and the control of the water output, thus enhancing the overall heat exchange process. The system is more controllable and improves operational convenience. By utilizing the internal cavity baffle 8 and the external water bath jacket 4 for dual internal and external heat exchange, the heat exchange efficiency of the premixing tank 1 is greatly improved, the temperature of the premixing tank 1 is better controlled, and the stability of the reaction is enhanced. In addition, the presence of the cavity baffle 8 also helps to mix the materials in the premixing tank 1 more evenly, increasing the stirring intensity and making it less likely for the mixture of sulfuric acid and titanium concentrate to deposit and form solid phases. From this perspective, it can also achieve a more complete heat exchange effect. Furthermore, a temperature sensor can be installed in the premixing tank 1 to detect the internal temperature, which allows for a better understanding of the internal temperature and adaptive adjustment of the chilled water temperature of the water-cooled unit.

[0030] In this embodiment, the water bath jacket 4 is disposed on the outer side and bottom surface of the premixing tank 1 and is integrally formed. This can make full use of the entire outer surface of the premixing tank 1, greatly increase the heat exchange area, and avoid problems such as the bottom of the premixing tank 1 not being able to exchange heat, which can easily cause local high temperature and the formation of solid phase.

[0031] In this embodiment, the water bath jacket 4 is provided with a plurality of baffles 5 inside, and adjacent baffles 5 are staggered and spaced apart. This is a mature prior art, and the specific arrangement is clear to those skilled in the art. Due to the arrangement of the baffles 5, the flow path and flow time of cold water in the water bath jacket 4 are increased, which greatly improves the heat exchange effect of the water bath jacket 4 and reduces the waste of water resources.

[0032] In this embodiment, the cavity baffle 8 has a cuboid structure and multiple cavities are provided. The multiple cavity baffles 8 are evenly distributed along the inner circumference of the premixing tank 1. Since the inside of the baffle is a cavity, it allows the flow of cooling water, thereby enabling more direct and effective heat exchange of the material inside the premixing tank 1 using the cavity baffles 8, resulting in higher heat exchange efficiency. At the same time, the cavity baffles 8 can also help improve the mixing effect inside the premixing tank 1, which is beneficial to ensure sufficient heat exchange of the material inside the premixing tank 1, and can also reduce the formation of solid scale from the sedimentation of the material inside the premixing tank 1, which could block the pipes and affect production. It also reduces the impact of shutdown for cleaning on production and the safety hazards caused by operators entering the tank.

[0033] In this embodiment, the water inlet system 6 includes a water inlet ring pipe 62 disposed around the water bath jacket 4. The water inlet ring pipe 62 is provided with a plurality of second water inlets 61, and one of the second water inlets 61 is connected to the bottom of a cavity baffle 8. In this way, the water-cooled unit directly supplies cold water into the water inlet ring pipe 62, and the cold water is introduced into each cavity baffle 8 through the second water inlets 61, so that the cooling water in each cavity baffle 8 flows from low to high, and the internal materials are heat exchanged more efficiently. In addition, the baffles 5 mentioned above can also be provided in the cavity baffle 8, which can also increase the flow path and flow time of cold water in the cavity baffle 8, and greatly improve the heat exchange effect of the cavity baffle 8.

[0034] The water outlet system 2 includes multiple second water outlets 22, which are connected to the first water outlet 73. This allows for more efficient discharge of the water after heat exchange in the cavity baffle 8 and the water after heat exchange in the water bath jacket 4, thus improving the convenience of operation.

[0035] To facilitate water discharge from the top of the cavity baffle 8, in this embodiment, the water discharge system 2 further includes a water discharge ring pipe 21. Multiple second water outlets 22 are respectively connected to the water discharge ring pipe 21. The water discharge ring pipe 21 is connected to the first water outlet 73 through a connecting water pipe. In this way, the water is collected through the water discharge ring pipe 21, thereby more conveniently discharging the water after heat exchange in the cavity baffle 8 to the first water outlet 73, and finally discharging it together.

[0036] Example 2

[0037] The difference between this embodiment and embodiment 1 is that the structure of the cavity baffle 8 is different. The cavity baffle 8 is arranged in a spiral shape around the inner circumference of the premixing tank 1. This can make the contact area between the cavity baffle 8 and the internal material larger, and can fully exchange heat with the material at different angles in the circumferential direction, thereby improving the uniformity and efficiency of heat exchange.

[0038] In this embodiment, the second water outlet 22 at the top of the cavity baffle 8 is connected to the first water outlet 73 at the top of the water bath jacket 4. In this case, an inlet pipe and an outlet pipe can be directly installed at the bottom and top of the spiral cavity baffle 8, respectively. That is, the water outlet system 2 only includes the second water outlet 22, which is directly connected to the first water outlet 73 at the top of the water bath jacket 4 through the second water outlet 22 of the top outlet pipe, making it more convenient to use.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A continuous acidolysis premixing tank heat exchange device, characterized in that, It includes a premixing tank and a water bath jacket disposed on the outer periphery of the premixing tank. The bottom of the water bath jacket is connected to a first water inlet and the top is connected to a first water outlet. A cavity baffle is provided on the inner circumference of the premix tank. The bottom of the cavity baffle is connected to a water inlet system and the top is connected to a water outlet system. The water outlet system is connected to the first water outlet of the water bath jacket. Both the water inlet system and the water bath jacket are connected to an external water-cooling unit.

2. The continuous acidolysis premixing tank heat exchanger according to claim 1, characterized in that, The water bath jacket is disposed on the outer side and bottom surface of the premix tank and is integrally formed.

3. The continuous acidolysis premixing tank heat exchanger according to claim 2, characterized in that, The water bath jacket is equipped with multiple baffles.

4. The continuous acidolysis premixing tank heat exchanger according to claim 3, characterized in that, The adjacent baffles are staggered and spaced apart.

5. The continuous acidolysis premixing tank heat exchanger according to claim 1, characterized in that, The cavity baffle has a cuboid structure and multiple cavities are provided, which are evenly distributed along the inner circumference of the premixing tank.

6. The continuous acidolysis premixing tank heat exchanger according to claim 5, characterized in that, The water inlet system includes a water inlet ring pipe disposed around the water bath jacket, and the water inlet ring pipe is provided with a plurality of second water inlets, one of which is connected to the bottom of the cavity baffle. The water outlet system includes multiple second water outlets, which are connected to the first water outlet.

7. The continuous acidolysis premixing tank heat exchanger according to claim 6, characterized in that, The water outlet system also includes a water outlet ring pipe, and a plurality of second water outlets are respectively connected to the water outlet ring pipe. The water outlet ring pipe is connected to the first water outlet through a connecting water pipe.

8. The continuous acidolysis premixing tank heat exchanger according to claim 1, characterized in that, The cavity baffle is arranged in a spiral structure around the inner circumference of the premixing tank.

9. The continuous acidolysis premixing tank heat exchanger according to claim 1, characterized in that, The second water outlet at the top of the cavity baffle is directly connected to the first water outlet at the top of the water bath jacket.

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