A heat exchange device for pre-desiliconization heating

Abstract

The utility model discloses a kind of heat exchange devices for pre-desilication heating, including base, the base is equipped with uniform heating desilication structure, for uniform heating, the base upper is equipped with uniform stirring structure, for cooperation uniform heating desilication structure realizes stirring uniformity.The utility model belongs to heat exchange equipment technical field, specifically refers to a kind of heat exchange devices for pre-desilication heating, effectively solve the heat exchange device of pre-desilication heating mostly is heated in inside, upper stirring, it is easy to cause temperature cannot be heated as a whole, cause the problem of uneven temperature of impurity removal.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchange equipment, specifically referring to a heat exchange device for pre-desilicon heating. Background Technology

[0002] Silica is a common impurity in bauxite and is the most harmful impurity in the Bayer process for alumina production. Silica reacts with alkali to form hydrated sodium aluminosilicate, causing losses of both alkali and alumina. It also forms insoluble silica scales that adhere to the heat exchanger surface, reducing the heat transfer coefficient and affecting heat transfer efficiency. To minimize the harm caused by silicon impurities during production, a pre-desiliconization process is typically included to remove silicon from the bauxite. The operating temperature for silicon removal is 100–105°C. However, the temperature of the raw ore slurry varies slightly depending on the raw material preparation process, typically between 80–90°C. Therefore, the pre-desiliconization process requires heating the raw ore slurry to reach the required desiliconization temperature before proceeding with the pre-desiliconization.

[0003] However, most existing heat exchange devices for pre-desilicon heating heat exchange internally and stir from above. Due to the poor fluidity of the slurry, the temperature cannot be heated evenly, resulting in uneven removal temperature and affecting the removal effect. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model proposes a heat exchange device for pre-desilicon heating, which effectively solves the problem that most heat exchange devices for pre-desilicon heating heat internal heating and top stirring, which easily causes the temperature to not be heated as a whole and results in uneven impurity removal temperature.

[0005] The technical solution adopted by this utility model is as follows: The present utility model proposes a heat exchange device for pre-desiliconization heating, including a base, a uniform heating desiliconization structure on the base for uniform heating, and a uniform stirring structure above the base for cooperating with the uniform heating desiliconization structure to achieve uniform stirring.

[0006] Preferably, the uniform heating desilication structure includes a heating controller fixedly mounted on a base, a desilication tank fixedly mounted on the heating controller, a heating copper pipe electrically connected above the heating controller and inserted into the desilication tank through the bottom of the desilication tank, and a discharge port installed on the outer side of the bottom of the desilication tank.

[0007] To achieve better uniform mixing, the uniform mixing structure includes a support base fixed to the side of the base, a hydraulic lifting column fixed vertically below the horizontal plate of the support base, an installation base fixed below the hydraulic lifting column, a motor installed below the installation base, a protective cover fixed below the output shaft of the motor, and a stirring rod welded below the protective cover.

[0008] To achieve uniform heating more quickly, the heating copper tubes are arranged in a circular pattern inside the desilication tank, with three rings arranged from the inside out.

[0009] Furthermore, the stirring rods are arranged between the two sets of heating copper tubes and are arranged in a cross shape in the middle.

[0010] To achieve rapid material discharge, two sets of discharge ports are set on the left and right sides of the desiliconization tank.

[0011] The beneficial effects of this utility model using the above structure are as follows: The heat exchange device proposed in this solution for pre-desilicon heating has a heating copper tube vertically upward set at the bottom of the desilicon tank, thereby heating the alumina slurry in the desilicon tank as a whole. At the same time, the stirring rod rotates and stirs in the gap of the heating copper tube, making the heating more uniform and the reaction and impurity removal more rapid. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a heat exchange device for pre-desiliconization heating proposed in this utility model.

[0013] Figure 2 This is a cross-sectional structural schematic diagram of a heat exchange device for pre-desilicon heating proposed in this utility model;

[0014] Figure 3 This is another cross-sectional structural schematic diagram of a heat exchange device for pre-desiliconization heating proposed in this utility model;

[0015] Figure 4 This is a schematic diagram of the third cross-sectional structure of a heat exchange device for pre-desilicon heating proposed in this utility model.

[0016] The components include: 1. base; 2. uniform heating and desilication structure; 3. uniform stirring structure; 4. heating controller; 5. desilication tank; 6. heating copper pipe; 8. discharge port; 9. support seat; 10. hydraulic lifting column; 11. mounting seat; 12. motor; 13. protective cover; and 14. stirring rod.

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 and Figure 2 As shown, the present invention proposes a heat exchange device for pre-desiliconization heating, including a base 1, a uniform heating desiliconization structure 2 on the base 1 for uniform heating, and a uniform stirring structure 3 above the base 1 for cooperating with the uniform heating desiliconization structure 2 to achieve uniform stirring.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the uniform heating desilication structure 2 includes a heating controller 4 fixedly mounted on the base 1. A desilication tank 5 is fixedly mounted on the heating controller 4. A heating copper pipe 6 is electrically connected above the heating controller 4 and is inserted into the desilication tank 5 through the bottom of the desilication tank 5. The heating copper pipe 6 is arranged in a ring shape inside the desilication tank 5, with three rings arranged from the inside out. A discharge port 8 is installed on the outer side of the bottom of the desilication tank 5. Two sets of discharge ports 8 are arranged on the left and right sides of the desilication tank 5.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the uniform stirring structure 3 includes a support base 9 fixedly installed on the side of the base 1. A hydraulic lifting column 10 is fixedly and vertically installed below the horizontal plate of the support base 9. An installation base 11 is fixedly installed below the hydraulic lifting column 10. A motor 12 is installed below the installation base 11. A protective cover 13 is fixedly installed below the output shaft of the motor 12. A stirring rod 14 is welded below the protective cover 13. The stirring rod 14 is arranged between two sets of heating copper tubes 6 and is arranged in a cross shape in the middle.

[0022] In practical use, the alumina slurry and desilication alkali solution are first mixed and added to the desilication tank 5. Then, the hydraulic lifting column 10 is controlled to push the motor 12 below the mounting base 11 downward, thereby inserting the stirring rod 14 on the protective cover 13 below the motor 12 into the gap between the heating copper tubes 6 inside the desilication tank 5. Then, the motor 12 is controlled to drive the stirring rod 14 below the protective cover 13 to rotate between the gaps between the heating copper tubes 6, thereby mixing the alumina slurry and alkali solution in the desilication tank 5 evenly. At the same time, the heating controller 4 controls the heating copper tubes 6 to heat the alumina slurry in the desilication tank 5. At this time, the heating copper tubes 6 are evenly inserted into the alumina slurry inside the desilication tank 5, and the stirring rod 14 stirs the slurry, thereby achieving uniform heating and uniformly controlling the overall temperature at the reaction temperature, thus achieving high-efficiency impurity removal.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0025] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A heat exchange device for pre-desilicon heating, characterized in that: Includes a base (1), on which a uniform heating and desilication structure (2) is provided for uniform heating, and a uniform stirring structure (3) is provided above the base (1) for cooperating with the uniform heating and desilication structure (2) to achieve uniform stirring.

2. The heat exchange device for pre-desilicon heating according to claim 1, characterized in that: The uniform heating desilication structure (2) includes a heating controller (4) fixedly mounted on the base (1), a desilication tank (5) fixedly mounted on the heating controller (4), a heating copper pipe (6) electrically connected above the heating controller (4) and inserted into the desilication tank (5) through the bottom of the desilication tank (5), and a discharge port (8) installed on the outer side of the bottom of the desilication tank (5).

3. A heat exchange device for pre-desilicon heating according to claim 2, characterized in that: The uniform stirring structure (3) includes a support base (9) fixedly disposed on the side of the base (1). A hydraulic lifting column (10) is fixedly and vertically disposed below the horizontal plate of the support base (9). An installation base (11) is fixedly disposed below the hydraulic lifting column (10). An electric motor (12) is installed below the installation base (11). A protective cover (13) is fixedly disposed below the output shaft of the electric motor (12). A stirring rod (14) is welded below the protective cover (13).

4. A heat exchange device for pre-desilicon heating according to claim 3, characterized in that: The heating copper tubes (6) are arranged in a circular pattern inside the desilication tank (5), with three rings arranged from the inside out.

5. A heat exchange device for pre-desilicon heating according to claim 4, characterized in that: The stirring rod (14) is arranged between the two sets of heating copper tubes (6) and is arranged in a cross shape in the middle.

6. A heat exchange device for pre-desilicon heating according to claim 5, characterized in that: Two sets of discharge ports (8) are set on the left and right sides of the desiliconization tank (5).

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