Alumina filtering device

Abstract

The utility model relates to the technical field of molten aluminium processing device more specifically, relate to an aluminium oxide filter equipment, including box, heater, aluminium oxide filter bed and hot -blast circulating fan, the box includes heating area, filter area and circulation area that communicate in proper order, the heater is located in the heating area, aluminium oxide filter bed is located in the filter area, hot -blast circulating fan is located on the box, the air intake of hot -blast circulating fan with circulation area intercommunication, the air outlet of hot -blast circulating fan with heating area intercommunication, the utility model discloses through setting up hot -blast circulating fan and circulation area, adopts hot -blast circulation to preheat aluminium oxide filter bed, makes hot -blast temperature reach the temperature of heater, improves heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum liquid processing equipment, and more specifically, to an alumina filtration device. Background Technology

[0002] In the production of aluminum and aluminum alloys, smelting and purification are two crucial steps. To ensure product quality, a vital part of the aluminum alloy production process is the purification of the molten aluminum to remove internal impurities such as hydrogen, non-metallic substances, and metallic impurities. Currently, common purification methods include filtration using filters and refining with the addition of refining agents.

[0003] Deep-bed filters are a commonly used filtration device in the purification process of aluminum alloy melts. They typically employ an alumina filter bed, preheating it by blowing heat onto the bed with compressed air. However, this method suffers from low heat exchange efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of low heat exchange efficiency in existing alumina filtration devices and to provide an alumina filtration device that improves heat exchange efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An alumina filtration device is provided, comprising a housing, a heater, an alumina filter bed, and a hot air circulating fan. The housing includes a heating zone, a filtration zone, and a circulation zone connected in sequence. The heater is disposed in the heating zone, the alumina filter bed is disposed in the filtration zone, and the hot air circulating fan is disposed on the housing. The air inlet of the hot air circulating fan is connected to the circulation zone, and the air outlet of the hot air circulating fan is connected to the heating zone.

[0006] In this alumina filtration device, the hot air circulation fan and heater are turned on. Air is heated by the heater in the heating zone and becomes hot air. This hot air enters the filtration zone to preheat the alumina filter bed. The hot air then enters the circulation zone and is blown back into the filtration zone by the hot air circulation fan, thus circulating the hot air. By setting up the hot air circulation fan and circulation zone, and using hot air circulation to preheat the alumina filter bed, the hot air temperature reaches the heater temperature, improving heat exchange efficiency.

[0007] Furthermore, the housing includes a heating chamber and a filter chamber connected in communication, with the heating zone located inside the heating chamber and the filter zone and circulation zone located inside the filter chamber. Separating the heating chamber and filter chamber allows for the maintenance of the internal heater by disassembling the heating chamber.

[0008] Furthermore, the heating chamber is located at the top of the filter chamber. After being heated by the heater inside the heating chamber, the air enters the filter chamber from the top to preheat the alumina filter bed, improving heating uniformity and reducing energy waste.

[0009] Furthermore, the filter box is equipped with a vertical partition that divides the interior of the filter box into a filtration zone and a circulation zone, with the bottom of the filtration zone connected to the bottom of the circulation zone. Inside the filtration zone, hot air flows from top to bottom and then enters the circulation zone from the bottom of the filtration zone. This forced convection effectively overcomes the uneven temperature problem caused by the natural rise of hot air, thus achieving more uniform heating and higher energy efficiency.

[0010] Furthermore, the filtration zone includes, from top to bottom, an air inlet, a filter, and a connecting section, which are sequentially connected. The air inlet is connected to the heating zone, the alumina filter bed is located in the filter section, and the connecting section is connected to the circulation zone. Hot air enters from the air inlet, enters the alumina filter bed from the top for preheating, and then flows out from the bottom of the alumina filter bed into the connecting section. The hot air then enters the circulation zone from the connecting section for circulation, allowing the hot air to fully pass through the interior of the alumina filter bed and ensuring more uniform preheating inside the alumina filter bed.

[0011] Furthermore, the system also includes a controller. Temperature sensors are installed in the air inlet, filter, and connecting section. The temperature sensors, heater, and hot air circulating fan are all electrically connected to the controller. The temperature sensors monitor the temperatures of the air inlet, filter, and connecting section. Based on the feedback from the temperature sensors, the controller further controls the operation of the heater and hot air circulating fan to improve heat exchange efficiency.

[0012] Furthermore, the entire housing is sealed, and the hot air circulating fan is sealed to the housing. This prevents hot air leakage from the housing and improves heat exchange efficiency.

[0013] Furthermore, the inlet of the hot air circulating fan is sealed with an air inlet pipe, and the outlet of the hot air circulating fan is sealed with an air outlet pipe. Both the air inlet pipe and the air outlet pipe are sealed to the housing. The air inlet pipe communicates with the circulation zone, and the air outlet pipe communicates with the heating zone. By setting up the air inlet and air outlet pipes, hot air leakage is prevented, and heat exchange efficiency is improved.

[0014] Furthermore, the alumina filter bed is detachably connected to the housing, facilitating the replacement and maintenance of the internal alumina filter bed.

[0015] Furthermore, the alumina filter bed comprises alumina grids, alumina balls, and alumina gravel arranged sequentially from bottom to top. Filtering the molten aluminum using the alumina grids, balls, and gravel enhances the filtration effect, effectively removing foreign matter and oxide inclusions from the molten aluminum, and ensuring the purification quality of the molten aluminum.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. The present invention relates to an alumina filtration device, which preheats the alumina filter bed by setting up a hot air circulation fan and a circulation zone, and heats the air through multiple circulations to make the hot air temperature reach the temperature of the heater, thereby improving the heat exchange efficiency.

[0017] 2. In this utility model, an alumina filter device is provided. Hot air enters from the air inlet and then enters the alumina filter bed from the top for preheating. After flowing out from the bottom of the alumina filter bed, it enters the connecting part. The hot air then enters the circulation zone from the connecting part for circulation. Forced convection effectively overcomes the problem of uneven temperature caused by the natural rise of hot air, thereby achieving more uniform heating and higher energy efficiency.

[0018] 3. The alumina filtration device of this utility model filters molten aluminum through alumina grids, alumina balls and alumina gravel, which enhances the filtration effect, effectively removes foreign matter and oxide inclusions in the molten aluminum, and ensures the purification quality of the molten aluminum. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the alumina filtration device of this utility model; Figure 2 This is a schematic diagram of the internal structure of the filter box in the alumina filter device of this utility model; Figure 3 This is a schematic diagram of the internal structure of the alumina filter bed in the alumina filtration device of this utility model.

[0020] In the attached diagram: 100, housing; 110, heating chamber; 111, heating zone; 120, filter box; 121, filter zone; 122, circulation zone; 123, vertical partition; 200, heater; 300, alumina filter bed; 310, alumina grid; 320, alumina balls; 330, alumina gravel; 400, hot air circulation fan; 410, air inlet pipe; 420, air outlet pipe; 500, temperature sensor; 600, controller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The present utility model will be further described below with reference to specific embodiments. The accompanying drawings are only for illustrative purposes and represent only schematic diagrams, not actual pictures, and should not be construed as limiting the present patent. In order to better illustrate the embodiments of the present utility model, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not 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, the terms describing positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, if the embodiments of this utility model involve descriptions such as "first" and "second," these descriptions are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features. In addition, the meaning of "and / or" in the text is that it includes three parallel options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0023] Example 1 This embodiment is a first embodiment of an alumina filtration device, such as... Figure 1 As shown, the device includes a housing 100, a heater 200, an alumina filter bed 300, and a hot air circulating fan 400. The housing 100 includes a heating zone 111, a filtering zone 121, and a circulating zone 122 connected in sequence. The heater 200 is located in the heating zone 111, the alumina filter bed 300 is located in the filtering zone 121, and the hot air circulating fan 400 is located on the housing 100. The air inlet of the hot air circulating fan 400 is connected to the circulating zone 122, and the air outlet of the hot air circulating fan 400 is connected to the heating zone 111.

[0024] The housing 100 includes a heating chamber 110 and a filter chamber 120 connected together. The heating zone 111 is located inside the heating chamber 110, and the filter zone 121 and the circulation zone 122 are located inside the filter chamber 120. The heating chamber 110 and the filter chamber 120 are separated, and the heater 200 inside can be maintained by disassembling the heating chamber 110.

[0025] The housing 100 is completely sealed, and the hot air circulating fan 400 is sealed to the housing 100. This prevents hot air from leaking out of the housing 100 and improves heat exchange efficiency.

[0026] The hot air circulating fan 400 has an air inlet pipe 410 sealed at its air inlet and an air outlet pipe 420 sealed at its air outlet. Both the air inlet pipe 410 and the air outlet pipe 420 are sealed to the housing 100. The air inlet pipe 410 is connected to the circulation zone 122, and the air outlet pipe 420 is connected to the heating zone 111. The air inlet pipe 410 and the air outlet pipe 420 are designed to prevent hot air leakage and improve heat exchange efficiency.

[0027] The working principle of the alumina filtration device in this embodiment is as follows: In operation, the hot air circulating fan 400 and heater 200 are turned on. Air is heated by the heater 200 in the heating zone 111, becoming hot air. This hot air enters the filtration zone 121 to preheat the alumina filter bed 300. The hot air then enters the circulation zone 122 from the filtration zone 121 and is blown back into the filtration zone 121 by the hot air circulating fan 400, thus circulating the hot air again. By setting up the hot air circulating fan 400 and the circulation zone 122, the alumina filter bed 300 is preheated through hot air circulation. Multiple air circulations and heating ensure the hot air temperature reaches the temperature of the heater 200, improving heat exchange efficiency. Simultaneously, the energy consumption of the heater 200 is reduced, significantly lowering preheating costs and solving the problem of high energy consumption in existing technologies.

[0028] Example 2 This embodiment is the second embodiment of the alumina filtration device. This embodiment is similar to the first embodiment, except that the heating box 110 is located at the top of the filter box 120. After the air is heated by the heater 200 inside the heating box 110, it enters the filter box 120 from the top to preheat the alumina filter bed 300, thereby improving heating uniformity and reducing energy waste.

[0029] The filter box 120 is equipped with a vertical partition 123, which divides the interior of the filter box 120 into a filtration zone 121 and a circulation zone 122. The bottom of the filtration zone 121 is connected to the bottom of the circulation zone 122. Inside the filtration zone 121, hot air flows from top to bottom, then enters the circulation zone 122 from the bottom of the filtration zone 121. Hot air, being less dense, naturally rises. This downward airflow is against the natural convection direction, forcing the hot air to move downwards, penetrating and flowing through the entire alumina filter bed 300, and then exiting from the bottom. This forced circulation effectively prevents the accumulation of heat-dissipating air at the top, resulting in a more uniform temperature throughout the chamber and avoiding cold and hot zones. Forced convection effectively overcomes the uneven temperature caused by the natural rise of hot air, thus achieving more uniform heating and higher energy efficiency. It also prevents overheating at the top and underheating at the bottom. Furthermore, it can suppress dust or debris downwards, preventing them from being blown up by the rising airflow and polluting the interior environment.

[0030] The filtration zone 121 comprises, from top to bottom, an air inlet, a filtration section, and a connecting section, which are sequentially connected. The air inlet is connected to the heating zone 111, and the alumina filter bed 300 is located in the filtration section. The connecting section is connected to the circulation zone 122. Hot air enters from the air inlet, enters the alumina filter bed 300 from the top for preheating, and then flows out from the bottom of the alumina filter bed 300 into the connecting section. The hot air then enters the circulation zone 122 from the connecting section for circulation, ensuring that the hot air passes fully through the interior of the alumina filter bed 300 and that the preheating inside the alumina filter bed 300 is more uniform.

[0031] It also includes a controller 600, and temperature sensors 500 are installed in the air inlet, filter, and connecting sections. The temperature sensors 500, heater 200, and hot air circulating fan 400 are all electrically connected to the controller 600. The temperature sensors 500 monitor the temperature of the air inlet, filter, and connecting sections, and the controller 600 further controls the heater 200 and hot air circulating fan 400 to operate based on the feedback from the temperature sensors 500, thereby improving heat exchange efficiency.

[0032] Example 3 This embodiment is the third embodiment of the alumina filtration device. It is similar to the first embodiment, except that the alumina filter bed 300 is detachably connected to the housing 100. This facilitates the replacement and maintenance of the internal alumina filter bed 300, reduces production costs, and improves production efficiency.

[0033] The alumina filter bed 300 includes an alumina grid 310, alumina balls 320, and alumina gravel 330 arranged sequentially from bottom to top. The alumina grid 310, alumina balls 320, and alumina gravel 330 filter the molten aluminum, enhancing the filtration effect, effectively removing foreign matter and oxide inclusions from the molten aluminum, and ensuring the purification quality of the molten aluminum.

[0034] The steps for using the alumina filtration device provided by this utility model are as follows: Check the sealing performance of enclosure 100 to ensure that the interior of enclosure 100 is isolated from the external environment. Specifically, seal the gaps in enclosure 100 with sealant, check that the sealing rings are intact and undamaged, and ensure that the sealing performance of enclosure 100 meets the required working pressure. Clean the interior of enclosure 100 to remove residual impurities. Specifically, use a high-pressure water gun to clean the inner walls and corners of enclosure 100 to remove impurities and dust, ensuring that the interior of enclosure 100 is clean and free of contamination. Check the working status of hot air circulating fan 400 to ensure that it operates smoothly. Specifically, check that the speed of hot air circulating fan 400 reaches the required speed, listen to the operating sound of hot air circulating fan 400 to ensure it is normal, and ensure that hot air circulating fan 400 operates stably. Alumina grid 310, alumina balls 320, and alumina gravel 330 are laid inside the housing 100. Specifically, the alumina grid, alumina balls, and alumina gravel are weighed according to the design ratio. The specific ratio can be 1:3 for the mass of alumina grid to alumina balls and 1:5 for the mass of alumina balls to alumina gravel. The alumina grid has a mesh diameter of 2-5 mm, a length of 500 mm, and a width of 200 mm. The alumina grid 310 is placed at the bottom of the alumina filter bed 300 to form the second filter layer. Alumina balls 320 are evenly distributed on the alumina grid 310 with a spacing of 50-100 mm to form a stable support structure. Alumina gravel 330 is evenly spread on the alumina balls 320 with a thickness of 50-100 mm to form the first filter layer. Start the hot air circulating fan 400, and blow compressed air into the air inlet pipe of the heating box 110 through the air outlet of the hot air circulating fan 400. The pressure of the compressed air is 0.6-0.8MPa, and the flow rate is 10-15m³ / h. 3The heater 200 is powered by a 10kW, 380V power supply, generating a large amount of heat. This heat is dissipated through the heating chamber 110 to the filter chamber 120, maintaining hot air circulation for 30-40 minutes to raise the internal temperature to 200-300℃, thus preheating the alumina filter bed 300. Simultaneously, the temperature is monitored and the hot air circulation time is controlled. Specifically, the temperature sensor 500 (using either a K-type or R-type thermocouple, with a detection range of 0-1000℃) monitors the temperature of the air inlet, filter, and connecting sections in real time. The internal temperature is set to 200-300℃. Once the target temperature is reached, the hot air circulation fan is turned off. Natural cooling takes 2-3 hours to allow the filter bed temperature to drop to room temperature, completing the preheating of the alumina filter bed 300.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An alumina filtration device, characterized in that, The device includes a housing (100), a heater (200), an alumina filter bed (300), and a hot air circulating fan (400). The housing (100) includes a heating zone (111), a filtration zone (121), and a circulation zone (122) connected in sequence. The heater (200) is located in the heating zone (111), the alumina filter bed (300) is located in the filtration zone (121), and the hot air circulating fan (400) is located on the housing (100). The air inlet of the hot air circulating fan (400) is connected to the circulation zone (122), and the air outlet of the hot air circulating fan (400) is connected to the heating zone (111).

2. The alumina filtration device according to claim 1, characterized in that, The housing (100) includes a heating chamber (110) and a filter chamber (120) connected in series. The heating zone (111) is located inside the heating chamber (110), and the filter zone (121) and the circulation zone (122) are located inside the filter chamber (120).

3. The alumina filtration device according to claim 2, characterized in that, The heating box (110) is located on top of the filter box (120).

4. The alumina filtration device according to claim 3, characterized in that, The filter box (120) is provided with a vertical partition (123), which divides the interior of the filter box (120) into a filtration zone (121) and a circulation zone (122). The bottom of the filtration zone (121) is connected to the bottom of the circulation zone (122).

5. The alumina filtration device according to claim 4, characterized in that, The filtration zone (121) includes an air inlet, a filter, and a connecting section from top to bottom. The air inlet, the filter, and the connecting section are connected in sequence. The air inlet is connected to the heating zone (111). The alumina filter bed (300) is located in the filter section. The connecting section is connected to the circulation zone (122).

6. The alumina filtration device according to claim 5, characterized in that, It also includes a controller (600), and the air inlet, the filter and the connecting part are all equipped with temperature sensors (500). The temperature sensors (500), the heater (200) and the hot air circulating fan (400) are all electrically connected to the controller (600).

7. The alumina filtration device according to any one of claims 1 to 6, characterized in that, The housing (100) is completely sealed, and the hot air circulating fan (400) is sealed to the housing (100).

8. The alumina filtration device according to claim 7, characterized in that, The hot air circulating fan (400) has an air inlet pipe (410) sealed at its air inlet and an air outlet pipe (420) sealed at its air outlet. Both the air inlet pipe (410) and the air outlet pipe (420) are sealed to the housing (100). The air inlet pipe (410) is connected to the circulation zone (122), and the air outlet pipe (420) is connected to the heating zone (111).

9. The alumina filtration device according to any one of claims 1 to 6, characterized in that, The alumina filter bed (300) is detachably connected to the housing (100).

10. The alumina filtration device according to any one of claims 1 to 6, characterized in that, The alumina filter bed (300) includes an alumina grid (310), alumina balls (320) and alumina gravel (330) arranged sequentially from bottom to top.

Images