A cooling device for a sodium aluminate decomposition tank

Abstract

The utility model relates to the technical field of cooling device, the utility model provides a kind of cooling device for sodium aluminate decomposition tank, it is applied to decomposition first tank and decomposition middle tank, including base, further including heat exchanger, transfer mechanism and cooling mechanism, heat exchanger is installed on base, transfer mechanism is set on base, for cooperation heat exchanger with the slurry in decomposition first tank is transferred to decomposition middle tank, cooling mechanism is set on base, for cooperation heat exchanger with the slurry in the heat exchange of flow in heat exchanger is cooled, temperature sensor is installed on the inner side wall of decomposition middle tank, temperature sensor and first motor electrically connected, adjusting baffle outer end face is arc, adjusting baffle is equipped with rubber sleeve.Solution the technical problem that the temperature difference of decomposition first and last tank is not fixed in prior art, which is greatly influenced by ambient temperature, through the above technical scheme.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling devices, specifically to a cooling device for a sodium aluminate decomposition tank. Background Technology

[0002] In the production process of alumina, bauxite is usually used as raw material. After grinding, leaching, red mud separation and cooling, the sodium aluminate solution is sent to the decomposition tank to gradually generate aluminum hydroxide slurry. The aluminum hydroxide slurry is filtered and then calcined to obtain alumina product. In existing technologies, sodium aluminate is decomposed into aluminum hydroxide through three stages: the first, middle, and final decomposition tanks. The temperature of the first decomposition tank is relatively stable, and the temperature difference between the first and final tanks needs to be adjusted to a fixed level to meet the temperature requirements for high sodium aluminate decomposition rates. However, natural cooling is greatly affected by ambient temperature, resulting in an unstable temperature difference between the first and final decomposition tanks. For example, in summer, the ambient temperature is high, and heat dissipation is slow, while in winter, the ambient temperature is low, and heat dissipation is fast. When the temperature of the final decomposition tank is low, the sodium aluminate decomposition rate is high, but the quality of the generated aluminum hydroxide and subsequent alumina is unstable. When the temperature of the final decomposition tank is high, the sodium aluminate decomposition rate is low, which does not conform to the goal of efficient production. Therefore, a cooling device is needed to precisely control the temperature of the three-stage decomposition tanks. Utility Model Content

[0003] To overcome the above-mentioned defects, the present invention provides a cooling device for a sodium aluminate decomposition tank, which solves the technical problem that the natural cooling method in the prior art is greatly affected by the ambient temperature, resulting in an unstable temperature difference between the first and last tanks of the decomposition.

[0004] According to one aspect, at least one embodiment of the present invention provides a cooling device for a sodium aluminate decomposition tank, applied to the first decomposition tank and the second decomposition tank, including a base, a heat exchanger, a transfer mechanism, and a cooling mechanism. The heat exchanger is mounted on the base, the transfer mechanism is disposed on the base and is used to cooperate with the heat exchanger to transfer the slurry in the first decomposition tank to the second decomposition tank, and the cooling mechanism is disposed on the base and is used to cooperate with the heat exchanger to cool the slurry flowing in the heat exchanger.

[0005] Preferably, the transfer mechanism includes a first circulating pump, a first outlet pipe, and a second outlet pipe. The first circulating pump is mounted on the base. The input end of the first circulating pump is connected to the bottom end of the decomposition tank through a first inlet pipe. One end of the first outlet pipe is connected to the output end of the first circulating pump, and the other end is connected to the heat medium inlet of the heat exchanger. One end of the second outlet pipe is connected to the heat medium outlet of the heat exchanger, and the other end is connected to the top of the decomposition tank.

[0006] Furthermore, the cooling mechanism includes a liquid storage tank, a second circulating pump, a first cooling pipe, an adjusting component, a second cooling pipe, and a cooling component. The liquid storage tank is fixedly mounted on the base. The second circulating pump is mounted on the base, and its input end is connected to the liquid storage tank via a second water inlet pipe. One end of the first cooling pipe is connected to the output end of the second circulating pump, and the other end is connected to the cold medium inlet of the heat exchanger. The adjusting component is mounted on the first cooling pipe and is used to adjust the flow rate of the cooling water in the first cooling pipe. One end of the second cooling pipe is connected to the cold medium outlet of the heat exchanger. The cooling component is mounted on the liquid storage tank and is used to cool the cooling water in the second cooling pipe.

[0007] Furthermore, the adjustment assembly includes a rotating shaft, an adjustment baffle, a mounting frame, and a first motor. The rotating shaft is rotatably disposed inside the first cooling pipe. The adjustment baffle is fitted onto the rotating shaft and is coaxially and fixedly connected to the rotating shaft. The mounting frame is fixedly connected to the first cooling pipe. The first motor is installed inside the mounting frame. The output end of the first motor passes through the first cooling pipe and is coaxially and fixedly connected to one end of the rotating shaft.

[0008] As a further embodiment of this application, the cooling assembly includes a cooling tank, a crossbeam, a drive shaft, fan blades, a second motor, and a return component. The cooling tank is fixedly mounted on the liquid storage tank. The other end of the second cooling pipe is connected to the top of the cooling tank. The crossbeam is fixedly mounted on the top of the cooling tank. The drive shaft is rotatably connected to the crossbeam. One end of the drive shaft has multiple fan blades fixedly mounted circumferentially. The second motor is mounted on the crossbeam. The output end of the second motor is coaxially fixedly connected to the other end of the drive shaft. The return component is disposed on the cooling tank.

[0009] As a further embodiment of this application, the reflux component includes a reflux pipe and a solenoid valve. The two ends of the reflux pipe are respectively connected to the bottom of the cooling tank and the top of the liquid storage tank, and the solenoid valve is disposed on the reflux pipe.

[0010] Based on the aforementioned scheme, a temperature sensor is installed on the inner wall of the decomposition tank, and the temperature sensor is electrically connected to the first motor.

[0011] Based on the aforementioned scheme, the outer end face of the adjusting baffle is arc-shaped, and a rubber sleeve is fitted onto the adjusting baffle.

[0012] The beneficial effects of this utility model are as follows: 1. In this utility model, through the cooperation of heat exchanger, transfer mechanism and cooling mechanism, the first circulation pump and the second circulation pump are started at the same time, respectively driving the high temperature slurry and cooling water into the heat exchanger. The hot and cold media alternately flow through adjacent flow channels to carry out indirect heat exchange. Then, the cooled slurry is transferred to the decomposition tank through the second water outlet pipe. The temperature in the decomposition tank is sensed by the temperature sensor, which sends a signal to the first motor and controls the first motor to drive the shaft to rotate. The rotation of the shaft drives the adjusting baffle and the rubber sleeve to rotate along the inner wall of the first cooling pipe. In this way, the flow rate of the cooling water is adjusted according to the temperature of the slurry in the decomposition tank to adjust the cooling efficiency of the slurry in the heat exchanger. 2. In this utility model, the cooling water flowing in the heat exchanger is transferred to the cooling tank through the second cooling pipe. By starting the second motor, multiple fan blades are driven to rotate, thereby cooling the cooling water in the cooling tank whose temperature has risen. When the temperature of the cooling water in the cooling tank drops, the cooling water is transferred to the liquid storage tank through the return pipe by activating the solenoid valve. In this way, the cooling water can be reused and resources are saved. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a cooling device for a sodium aluminate decomposition tank in one embodiment of the present invention; Figure 2 This is a structural schematic diagram of the entire invention from another perspective; Figure 3 This is a partial structural cross-sectional view of the cooperation between the second cooling pipe and the regulating component in this utility model; Figure 4 This is a schematic diagram of the structure of the cross-shaped component, drive shaft, fan blades, and second motor in this utility model.

[0015] In the diagram: 1. First decomposition tank; 2. Second decomposition tank; 3. Base; 4. Heat exchanger; 5. First circulating pump; 6. First inlet pipe; 7. First outlet pipe; 8. Second outlet pipe; 9. Storage tank; 10. Second circulating pump; 11. Second inlet pipe; 12. First cooling pipe; 13. Second cooling pipe; 14. Rotating shaft; 15. Adjusting baffle; 16. Mounting frame; 17. First motor; 18. Cooling tank; 19. Cross-shaped component; 20. Drive shaft; 21. Fan blade; 22. Second motor; 23. Return pipe; 24. Solenoid valve; 25. Temperature sensor; 26. Rubber sleeve. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0017] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-4As shown, it illustrates a cooling device for a sodium aluminate decomposition tank according to an embodiment of the present invention, applied to the first decomposition tank 1 and the middle decomposition tank 2, including a base 3, a heat exchanger 4, a transfer mechanism and a cooling mechanism. like Figure 1 and Figure 2 As shown, heat exchanger 4 is mounted on base 3. Heat exchanger 4 is a wide-channel plate heat exchanger. Transfer mechanism is set on base 3 and is used to cooperate with heat exchanger 4 to transfer the slurry in the first decomposition tank 1 to the middle decomposition tank 2. Transfer mechanism includes first circulation pump 5, first outlet pipe 7 and second outlet pipe 8. First circulation pump 5 is mounted on base 3. The input end of first circulation pump 5 is connected to the bottom end of first decomposition tank 1 through first inlet pipe 6. One end of first outlet pipe 7 is connected to the output end of first circulation pump 5 and the other end is connected to the heat medium inlet of heat exchanger 4. One end of second outlet pipe 8 is connected to the heat medium outlet of heat exchanger 4 and the other end is connected to the top of middle decomposition tank 2. By starting first circulation pump 5, first circulation pump 5 draws out slurry in first decomposition tank 1 and enters heat exchanger 4 through first inlet pipe 6 and first outlet pipe 7 in sequence, and then transfers it to middle decomposition tank 2 through second outlet pipe 8. like Figure 2 and Figure 4 As shown, the cooling mechanism is mounted on the base 3 and is used to cooperate with the heat exchanger 4 to cool the slurry flowing in the heat exchanger 4. The cooling mechanism includes a storage tank 9, a second circulation pump 10, a first cooling pipe 12, an adjustment component, a second cooling pipe 13, and a cooling component. The storage tank 9 is fixedly mounted on the base 3. The second circulation pump 10 is mounted on the base 3. The input end of the second circulation pump 10 is connected to the storage tank 9 through the second water inlet pipe 11. One end of the first cooling pipe 12 is connected to the output end of the second circulation pump 10, and the other end is connected to the cold medium inlet of the heat exchanger 4. The adjustment component is mounted on the first cooling pipe 12 and is used to adjust the flow rate of the cooling water in the first cooling pipe 12. By starting the second circulation pump 10, the second circulation pump 10 draws out the cooling water in the storage tank 9 and enters the heat exchanger 4 through the second water inlet pipe 11 and the first cooling pipe 12 to cool the slurry. It should be added that the wide-channel plate heat exchanger 4 has a larger channel gap and a gentler channel cross section, which allows media containing particles, fibers or high viscosity to pass through smoothly and has a lower probability of clogging. By simultaneously starting the first circulation pump 5 and the second circulation pump 10, the high-temperature slurry and cooling water are respectively driven into the heat exchanger 4. The heat exchanger 4 is equipped with plates, and the hot and cold media alternately flow through adjacent channels for indirect heat exchange. Then, the cooled slurry is transferred to the decomposition tank 2 through the second water outlet pipe 8. like Figure 3As shown, the adjustment assembly includes a rotating shaft 14, an adjusting baffle 15, a mounting frame 16, and a first motor 17. The rotating shaft 14 is rotatably disposed inside the first cooling pipe 12. The adjusting baffle 15 is fitted onto the rotating shaft 14 and is coaxially and fixedly connected to the rotating shaft 14. The outer end face of the adjusting baffle 15 is arc-shaped, and a rubber sleeve 26 is fitted onto the adjusting baffle 15. The rubber sleeve 26 abuts against the inner wall of the first cooling pipe 12. The mounting frame 16 is fixedly connected to the first cooling pipe 12. The first motor 17 is installed inside the mounting frame 16. The output end of the first motor 17 passes through the first cooling pipe 12 and is coaxially and fixedly connected to one end of the rotating shaft 14. A sealing sleeve is provided at the connection between the first motor 17 and the first cooling pipe 12. A temperature sensor 25 is installed on the inner side wall of the decomposition tank 2. The temperature sensor 25 is electrically connected to the first motor 17. The first motor 17 is equipped with a controller that works in conjunction with a temperature sensor 25. The temperature sensor 25 senses the temperature inside the decomposition tank 2, sends a signal to the first motor 17, and controls the first motor 17 to drive the rotating shaft 14 to rotate. The rotation of the rotating shaft 14 causes the adjusting baffle 15 and the rubber sleeve 26 to rotate along the inner wall of the first cooling pipe 12. It should be noted that the adjusting baffle 15, together with the rubber sleeve 26, "blocks" the first cooling pipe 12. When the adjusting baffle 15 rotates, it creates a gap between the rubber sleeve 26 and the inner wall of the first cooling pipe 12, which can be used for the flow of cooling water. When the adjusting baffle 15 rotates 90 degrees, the flow rate of the cooling water is the fastest. In this way, the flow rate of the cooling water is adjusted according to the temperature of the slurry in the decomposition tank 2 to adjust the cooling efficiency of the slurry in the heat exchanger 4. It should be added that the first stage of controllable cooling of sodium aluminate dissolution in the first decomposition tank 1 to the middle decomposition tank 2 is achieved through the cooperation of heat exchanger 4, transfer mechanism and cooling mechanism, so that the sodium aluminate solution meets the expected temperature set in the final decomposition tank after the second stage of natural cooling from the middle decomposition tank 2 to the final decomposition tank. like Figure 2 and Figure 4As shown, one end of the second cooling pipe 13 is connected to the cold medium outlet of the heat exchanger 4. The cooling assembly is installed on the liquid storage tank 9 and is used to cool the cooling water in the second cooling pipe 13. The cooling assembly includes a cooling tank 18, a cross 19, a drive shaft 20, fan blades 21, a second motor 22, and a return component. The cooling tank 18 is fixedly installed on the liquid storage tank 9. The other end of the second cooling pipe 13 is connected to the top of the cooling tank 18. The cross 19 is fixedly installed at the top of the cooling tank 18. The drive shaft 20 is rotatably connected to the cross 19. Multiple fan blades 21 are fixedly arranged circumferentially on one end of the drive shaft 20. The second motor 22 is installed on the cross 19. The output end of the second motor 22 is coaxially fixedly connected to the other end of the drive shaft 20. By starting the second motor 22, the second motor 22... The output end of 2 drives the drive shaft 20 to rotate, and the drive shaft 20 drives multiple fan blades 21 to rotate, thereby cooling the cooling water in the cooling tank 18 whose temperature has risen. Multiple ventilation openings are formed between the cross 19 and the cooling tank 18 to facilitate faster cooling of the cooling water. The return component is set on the cooling tank 18 and includes a return pipe 23 and a solenoid valve 24. The two ends of the return pipe 23 are connected to the bottom of the cooling tank 18 and the top of the liquid storage tank 9, respectively. The inner bottom wall of the cooling tank 18 is set in a concave shape to facilitate the flow of cooling water to the return pipe 23. The solenoid valve 24 is set on the return pipe 23. When the temperature of the cooling water in the cooling tank 18 decreases, the cooling water will be transferred to the liquid storage tank 9 through the return pipe 23 by activating the solenoid valve 24, so as to reuse the cooling water. Working principle: When cooling the slurry in the first decomposition tank 1, the cooling device of this sodium aluminate decomposition tank simultaneously starts the first circulation pump 5 and the second circulation pump 10, which respectively drive the high-temperature slurry and cooling water into the heat exchanger 4. The heat exchanger 4 is equipped with plates, and the hot and cold media alternately flow through adjacent channels for indirect heat exchange. Then, the cooled slurry is transferred to the decomposition intermediate tank 2 through the second water outlet pipe 8. The temperature sensor 25 senses the temperature in the decomposition intermediate tank 2, sends a signal to the first motor 17 and controls the first motor 17 to drive the rotating shaft 14 to rotate. The rotation of the rotating shaft 14 drives the adjusting baffle 15 and the rubber sleeve 26 to rotate along the inner wall of the first cooling pipe 12. In this way, the flow rate of the cooling water is adjusted according to the temperature of the slurry in the decomposition intermediate tank 2 to adjust the cooling efficiency of the slurry in the heat exchanger 4. The cooling water flowing in the heat exchanger 4 is transferred to the cooling tank 18 through the second cooling pipe 13. By starting the second motor 22, the output of the second motor 22 drives the drive shaft 20 to rotate, and the drive shaft 20 drives multiple fan blades 21 to rotate, thereby cooling the cooling water in the cooling tank 18 whose temperature has risen. In addition, multiple ventilation openings are formed between the cross 19 and the cooling tank 18 to facilitate faster cooling of the cooling water. When the temperature of the cooling water in the cooling tank 18 drops, the cooling water will be transferred to the liquid storage tank 9 through the return pipe 23 by activating the solenoid valve 24, so as to reuse the cooling water.

[0023] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cooling device for a sodium aluminate decomposition tank, applied to the first decomposition tank (1) and the middle decomposition tank (2), comprising a base (3), characterized in that, Also includes: Heat exchanger (4), said heat exchanger (4) is mounted on said base (3); The transfer mechanism is mounted on the base (3) and is used to cooperate with the heat exchanger (4) to transfer the slurry in the first decomposition tank (1) to the middle decomposition tank (2). A cooling mechanism is provided on the base (3) and is used to cooperate with the heat exchanger (4) to cool the slurry flowing in the heat exchanger (4).

2. The cooling device for a sodium aluminate decomposition tank according to claim 1, characterized in that, The transfer mechanism includes: The first circulation pump (5) is installed on the base (3), and the input end of the first circulation pump (5) is connected to the bottom end of the decomposition tank (1) through the first water inlet pipe (6). The first water outlet pipe (7) has one end connected to the output end of the first circulating pump (5) and the other end connected to the heat medium inlet of the heat exchanger (4). The second water outlet pipe (8) has one end connected to the heat medium outlet of the heat exchanger (4) and the other end connected to the top of the decomposition tank (2).

3. The cooling device for a sodium aluminate decomposition tank according to claim 2, characterized in that, The cooling mechanism includes: A liquid storage tank (9) is fixedly mounted on the base (3); The second circulation pump (10) is mounted on the base (3), and the input end of the second circulation pump (10) is connected to the liquid storage tank (9) through the second water inlet pipe (11). The first cooling pipe (12) has one end connected to the output end of the second circulating pump (10) and the other end connected to the cold medium inlet of the heat exchanger (4); An adjustment component is provided on the first cooling pipe (12) for adjusting the flow rate of cooling water in the first cooling pipe (12); The second cooling pipe (13) has one end connected to the cold medium outlet of the heat exchanger (4); A cooling assembly is provided on the liquid storage tank (9) for cooling the cooling water in the second cooling pipe (13).

4. The cooling device for a sodium aluminate decomposition tank according to claim 3, characterized in that, The adjustment component includes: A rotating shaft (14) is rotatably disposed inside the first cooling pipe (12); Adjusting baffle (15), the adjusting baffle (15) is fitted on the rotating shaft (14) and is coaxially fixedly connected to the rotating shaft (14); Mounting frame (16), which is fixedly connected to the first cooling pipe (12); The first motor (17) is installed in the mounting frame (16). The output end of the first motor (17) passes through the first cooling pipe (12) and is coaxially fixedly connected to one end of the rotating shaft (14).

5. A cooling device for a sodium aluminate decomposition tank according to claim 4, characterized in that, The cooling assembly includes: Cooling tank (18), the cooling tank (18) is fixedly installed on the liquid storage tank (9), and the other end of the second cooling pipe (13) is connected to the top of the cooling tank (18); A cross (19) is fixedly installed at the top of the cooling tank (18); A drive shaft (20) is rotatably connected to the cross (19); Fan blades (21), a plurality of fan blades (21) are fixedly arranged on one end of the drive shaft (20); The second motor (22) is mounted on the cross (19), and the output end of the second motor (22) is coaxially and fixedly connected to the other end of the drive shaft (20); A return flow element is disposed on the cooling tank (18).

6. The cooling device for a sodium aluminate decomposition tank according to claim 5, characterized in that, The return component includes: The return pipe (23) has two ends connected to the bottom of the cooling tank (18) and the top of the liquid storage tank (9), respectively. Solenoid valve (24) is disposed on the return pipe (23).

7. The cooling device for a sodium aluminate decomposition tank according to claim 4, characterized in that, A temperature sensor (25) is installed on the inner wall of the decomposition tank (2), and the temperature sensor (25) is electrically connected to the first motor (17).

8. A cooling device for a sodium aluminate decomposition tank according to claim 4, characterized in that, The outer end face of the adjusting baffle (15) is arc-shaped, and a rubber sleeve (26) is fitted on the adjusting baffle (15).

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