Harmless treatment device for aluminum ash
By combining heating, stirring, ultrasound, and aeration in its device design, the problems of aluminum ash deposition at the bottom of the reactor and aluminum nitride hydrolysis are solved, achieving efficient harmless treatment of aluminum ash and improving reaction efficiency and the removal effect of harmful substances.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-03-10
AI Technical Summary
In existing wet processes, aluminum ash tends to accumulate at the bottom of the reactor, and the hydrolysis of aluminum nitride to form aluminum hydroxide makes it difficult for the reaction to continue, resulting in low processing efficiency.
The device is designed to combine heating, stirring, ultrasound, and aeration. It includes a spiral stirring blade, an annular heating tube, an ultrasonic vibrator, and an aeration device. Stirring prevents sedimentation, ultrasound enhances the reaction interface, and aeration promotes gas removal.
It improves the efficiency of harmless treatment of aluminum ash, increases the solid-liquid mass transfer area, enhances the reaction rate, promotes the removal of harmful substances, and is simple and convenient to operate.
Smart Images
Figure CN223980944U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum ash treatment technology, specifically to an aluminum ash harmless treatment device. Background Technology
[0002] Aluminum ash is a solid waste residue generated during the electrolytic aluminum or recycled aluminum process. Because it contains toxic and hazardous substances such as aluminum nitride and fluorides, aluminum ash was included in the National Hazardous Waste List in 2016. However, aluminum ash contains a large amount of aluminum and is a renewable resource that can be comprehensively utilized. Products made from it, such as polyaluminum chloride and calcium aluminate, are used in various fields. Therefore, considering the safety and quality of aluminum-based product production, its harmless treatment is essential.
[0003] Due to cost and process safety considerations, wet processes are preferred for the harmless treatment of aluminum ash in China. However, in wet processes, aluminum ash tends to accumulate at the bottom of the reactor, and aluminum nitride hydrolyzes to form aluminum hydroxide, which coats the reactants and makes it difficult for hydrolysis to continue, resulting in the generally low efficiency of wet processes.
[0004] This utility model proposes an aluminum ash harmless treatment device, which aims to accelerate the wet harmless treatment process of aluminum ash through a new device, so as to achieve efficient harmless treatment of aluminum ash. Utility Model Content
[0005] This invention provides a device for the harmless treatment of aluminum ash, which can solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A device for the harmless treatment of aluminum ash includes a sealed cylinder with an inlet and an outlet on its upper exterior and a liquid inlet on its upper side. A stirring device is arranged along its axis, with its upper end extending out of the sealed cylinder and connected to a power motor. A heating device is located in the middle of the sealed cylinder. Three ultrasonic vibrators are evenly arranged inside the sealed cylinder. An aeration device is located at the bottom of the sealed cylinder, comprising an aeration inlet, an annular aeration pipe, and aeration holes. The annular aeration pipe is coiled inside the bottom of the sealed cylinder, and aeration holes are evenly distributed on the annular aeration pipe. The upper end of the annular aeration pipe is connected to the aeration inlet. A discharge port is located at the bottom of the sealed cylinder.
[0008] The exhaust port is connected to an external exhaust gas treatment system to discharge the exhaust gas generated during the treatment process.
[0009] The stirring device is composed of a central shaft and spiral stirring blades, the upper end of the central shaft vertically penetrates the sealing cylinder and is connected with a power motor, the spiral stirring blades are uniformly distributed in a spiral shape along the central shaft, and the spiral stirring blades are fixedly connected with the central shaft through welding, and the welding points are uniformly distributed at the roots of the spiral stirring blades.
[0010] The heating device is composed of a heating support and an annular heating pipe, the heating support is welded to the middle part of the inner wall of the sealing cylinder, and the annular heating pipe penetrates through the heating support and surrounds the sealing cylinder.
[0011] The upper end of the ultrasonic vibration rod is fixed to the top of the sealing cylinder, vertically inserted into the sealing cylinder, and located between the spiral stirring blades and the annular heating pipe.
[0012] Compared with the prior art, the beneficial effects of the present application are:
[0013] 1. The aluminum ash harmless treatment device has heating, stirring, ultrasonic and aeration structures, can realize coupling of multiple strengthening measures, and can realize single-function and multi-function conversion operation of the device by adjusting parameters, and has the advantages of convenience and simple operation in industrial production. The stirring device adopts a spiral stirrer, which avoids the deposition of aluminum ash particles at the bottom of the reactor, increases the solid-liquid mass transfer area, and to some extent, can reduce the required liquid-solid ratio of the reaction, thereby improving the treatment efficiency.
[0014] 2. The aluminum ash harmless treatment device strengthens the aluminum ash harmless treatment process through ultrasonic and aeration functions. The ultrasonic wave makes the interface of the heterogeneous reaction form cavitation effect, the micro-gas nucleus cavitation bubble in the liquid vibrates under the action of the sound wave, obviously changes the characteristics of the particulate matter and the dissolved state in the solid-liquid phase, makes the solid surface produce strong energy and activation, and finally strengthens the reaction rate and reaction efficiency. In addition to strengthening the system turbulence and breaking the stable boundary layer of the solid surface, the aeration can also remove the ammonia gas generated during the denitrification process in time, so that the gas byproduct is continuously removed from the liquid reaction system, and the removal of fluorides and aluminum nitride in aluminum ash is further strengthened. BRIEF DESCRIPTION OF DRAWINGS
[0015] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.
[0016] Figure 1 Fig. 1 shows the overall structure of the aluminum ash harmless treatment device of the present application;
[0017] Figure 2 Fig. 1 shows the overall structure of the aluminum ash harmless treatment device of the present application;
[0018] Figure 3 The stirring device of the aluminum ash harmless treatment device is shown;
[0019] Figure 4 The heating device of the aluminum ash harmless treatment device is shown;
[0020] Figure 5 The aeration device of the aluminum ash harmless treatment device is shown;
[0021] The figure mark: 1, the sealing cylinder; 2, the feed inlet; 3, the exhaust port; 4, the liquid inlet; 5, stirring device; 51, central shaft; 52, spiral stirring blade; 6, power motor; 7, heating device; 71, heating support; 72, annular heating tube; 8, ultrasonic vibration rod; 9, aeration device; 91, aeration inlet; 92, annular aeration pipe; 93, aeration hole; 10, discharge port. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0023] Please refer to FIG. 1-5, the present application provides a kind of aluminum ash harmless treatment device, it includes sealing cylinder 1, the sealing cylinder 1 top is provided with feed inlet 2, exhaust port 3, liquid inlet 4 outside;The axis of the sealing cylinder 1 is installed with stirring device 5, the stirring device 5 upper end from sealing cylinder 1 and is connected with power motor 6;The inside of the sealing cylinder 1 is equipped with heating device 7;The sealing cylinder 1 inside is uniformly provided with three ultrasonic vibration rods 8;The inside of the lower of the sealing cylinder 1 is equipped with aeration device 9, the aeration device 9 includes aeration inlet 91, annular aeration pipe 92 and aeration hole 93, the annular aeration pipe 92 is coiled in the inside of the bottom end of the sealing cylinder 1, the aeration hole 93 is evenly distributed on the annular aeration pipe 92, the upper end of the annular aeration pipe 92 is connected with aeration inlet 91;The lower of the sealing cylinder 1 is equipped with discharge port 10.
[0024] Work flow description:
[0025] First, through feed inlet 2, aluminum ash is slowly added into sealing cylinder 1, and according to the processing process requirement and the amount of aluminum ash, appropriate amount of corresponding treatment liquid (such as acid or lye) is added through liquid inlet 4.
[0026] The second step involves starting the power motor 6, which drives the central shaft 51 of the stirring device 5 to rotate, thereby causing the spiral stirring blades 52 to start rotating. Under the action of the spiral stirring blades 52, the aluminum ash and the treatment liquid are fully and uniformly mixed inside the sealed cylinder 1, preventing the deposition of aluminum ash particles at the bottom of the device, increasing the mass transfer area between the solid and liquid, and improving the reaction efficiency.
[0027] The third step is to start the heating device 7. The annular heating tube 72 begins to heat up, heating the mixture of aluminum ash and treatment liquid inside the sealed cylinder 1. Placing the heating device 7 in the center allows heat to radiate evenly to all areas inside the sealed cylinder, avoiding uneven heating caused by local overheating or undercooling. Compared to non-central installation, this allows all parts of the sealed cylinder 1 to be heated synchronously and stably, effectively improving heating efficiency and quality, providing a suitable temperature environment for the removal reaction of harmful substances in the aluminum ash, and promoting the reaction.
[0028] The fourth step involves activating the ultrasonic transducers 8. The three ultrasonic transducers 8, evenly distributed inside the sealed cylinder 1, begin operating and generating ultrasonic waves. The evenly distributed design of the three transducers offers significant advantages. Compared to a single or non-uniformly distributed transducer, this arrangement can create a balanced and stable ultrasonic field over a larger area. During operation, ultrasonic action can be applied to the object being treated simultaneously from multiple directions, avoiding over- or under-treatment in certain areas due to a single point of application or uneven distribution. This greatly improves the uniformity, comprehensiveness, and efficiency of ultrasonic treatment.
[0029] Fifth, the aeration device 9 is activated. Gas enters the annular aeration pipe 92 through the aeration inlet 91, and then evenly enters the reaction system through the aeration holes 93. The continuously flowing gas forms abundant bubbles in the system, strongly agitating the liquid and promoting the uniform suspension of solid particles. This greatly expands the contact area between the solid and liquid phases, significantly improving the reaction efficiency. During the denitrification process, it can also promptly remove gaseous byproducts such as ammonia produced in the reaction from the liquid phase reaction system, accelerating the removal of gaseous byproducts and continuously enhancing the leaching and removal effect of harmful substances such as fluorides and aluminum nitride in aluminum ash.
[0030] The sixth step involves discharging the exhaust gas generated during the process through exhaust port 3, which then enters the connected exhaust gas treatment system for further processing. After the aluminum ash is rendered harmless, the power motor 6, heating device 7, ultrasonic vibrator 8, and aeration device 9 are stopped. Once the material inside the device has stabilized, the discharge port 10 is opened to discharge the treated material from the sealed cylinder 1.
[0031] This utility model discloses a harmless aluminum ash treatment device. In practical use, the device's operating mode can be flexibly adjusted according to different treatment needs and process requirements. For example, in certain specific treatment stages, only the stirring and heating functions can be activated for preliminary reaction; while when it is necessary to enhance the removal of harmful substances, the ultrasonic and aeration functions can be activated simultaneously, achieving coupled operation of multiple enhancement measures. In this way, it can effectively adapt to the requirements of different aluminum ash compositions and treatment targets, improving the device's versatility and treatment efficiency.
[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An aluminum ash harmless treatment device, comprising a sealed cylinder (1), an inlet (2) and an exhaust port (3) are arranged on the top of the outer part of the sealed cylinder (1), and a liquid inlet (4) is arranged on the upper side; a stirring device (5) is arranged along the axis of the sealed cylinder (1), the upper end of the stirring device (5) penetrates the sealed cylinder (1) and is connected with a power motor (6); a heating device (7) is arranged in the middle of the inner part of the sealed cylinder (1); three ultrasonic vibration rods (8) are evenly arranged in the inner part of the sealed cylinder (1); an aeration device (9) is arranged in the inner part below the sealed cylinder (1), the aeration device (9) comprises an aeration inlet (91), an annular aeration pipe (92) and aeration holes (93), the annular aeration pipe (92) is coiled in the inner part of the bottom end of the sealed cylinder (1), the aeration holes (93) are evenly distributed on the annular aeration pipe (92), and the upper end of the annular aeration pipe (92) is connected with the aeration inlet (91); a discharge port (10) is arranged below the sealed cylinder (1).
2. The aluminum dross harmless treatment device according to claim 1, characterized by: The exhaust port (3) is connected with an external tail gas treatment system, and is used for discharging tail gas generated in the treatment process.
3. The aluminum dross harmless treatment device according to claim 1, characterized by: The stirring device (5) is composed of a central shaft (51) and a spiral stirring blade (52), the upper end of the central shaft (51) penetrates the sealed cylinder (1) vertically and is connected with the power motor (6), the spiral stirring blade (52) is evenly distributed in a spiral shape along the central shaft (51), and is fixedly connected with the central shaft (51) in a welding manner, and the welding points are evenly distributed at the roots of the spiral stirring blades (52).
4. The aluminum dross harmless treatment device according to claim 1, characterized by: The heating device (7) comprises a heating support (71) and an annular heating pipe (72), the heating support (71) is welded to the inner wall of the middle part of the sealed cylinder (1), and the annular heating pipe (72) penetrates the heating support (71) and surrounds the sealed cylinder (1).
5. The aluminum dross harmless treatment device according to claim 1, characterized by: The upper end of the ultrasonic vibration rod is fixed to the top of the sealed cylinder (1), is inserted into the sealed cylinder (1) vertically downward, and is located between the spiral stirring blade (52) and the annular heating pipe (72).