A mixing device for hazardous waste disposal

Abstract

This utility model discloses a mixing device for hazardous waste disposal. The device relates to the field of hazardous waste treatment technology. The solution includes: a hazardous waste mixing container with a detachable discharge valve cover at its bottom; a motor mounted on the top of the container; a hollow stirring shaft mounted at the motor's output end, extending into the container, with a detachable sealing end cap at its bottom; multiple mixing blades mounted on the outer wall of the stirring shaft; and multiple hollow guide sleeves mounted on the stirring shaft, communicating with its interior. Through innovative structural design, the device avoids direct contact between transmission components and hazardous waste, achieving efficient and low-loss cleaning of the inner wall.

Description

Technical Field

[0001] This utility model relates to the field of hazardous waste treatment technology, specifically to a mixing device for hazardous waste disposal. Background Technology

[0002] In the solid hazardous waste treatment industry, mixing technology is one of the core technologies for achieving safe disposal. Its principle is to systematically optimize the physical and chemical properties of waste through scientifically proportioned and suitable materials, thereby significantly reducing environmental risks. In terms of physical property adjustment, mixing viscous organic sludge with rice husk ash utilizes the latter's high porosity to absorb moisture, greatly improving sludge fluidity and successfully overcoming the technical bottleneck of incineration. Regarding chemical property optimization, for strongly acidic chromium-containing waste residue, lime is used to neutralize the acidity, and sulfur-containing minerals are used to reduce and solidify highly toxic hexavalent chromium, effectively blocking heavy metal migration pathways. In the harmless treatment stage, the electronics dismantling industry mixes circuit board debris containing polybrominated diphenyl ethers with activated carbon loaded with metal catalysts, achieving complete decomposition of organic pollutants through high-temperature pyrolysis. These practices fully demonstrate that mixing technology can not only solve technical challenges in hazardous waste treatment but also achieve the synergistic goals of reduction, harmlessness, and resource recovery through precise control, providing a reliable technical path for industrial pollution control.

[0003] A solid hazardous waste mixing device disclosed in authorization announcement number (CN222586352U) includes a mixing chamber, a crushing mechanism mounted on the mixing chamber, a worm gear mounted on the crushing mechanism, a stirring mechanism installed inside the mixing chamber, and a driving connection between the stirring mechanism and the crushing mechanism. A cleaning mechanism is also provided inside the mixing chamber. In operation, a drive motor controls the rotation of a threaded rod, which in turn causes a cleaning plate threaded onto the threaded rod to move downwards along a guide rod, thereby cleaning impurities remaining on the inner wall of the mixing chamber to the lower side of the mixing chamber, thus preventing a large amount of impurities from remaining inside the mixing chamber.

[0004] The structure disclosed in this patent has defects in practical applications, specifically as follows: During the operation of the hazardous waste mixing device, the threaded rod, which is exposed to the material environment for a long time, faces a severe risk of wear. Hard particles will cause wear to the threads of the threaded rod. As the wear intensifies, the clearance of the threaded pair gradually increases, leading to a significant decrease in transmission efficiency, an aggravation of off-center loading, and even causing the cleaning plate to jam and fail. Utility Model Content

[0005] The purpose of this utility model is to provide a mixing device for hazardous waste disposal, which addresses the problem in the prior art where threaded rods are easily subjected to mechanical wear and chemical corrosion due to long-term exposure to hazardous waste, leading to transmission failure and loss of cleaning function. This device proposes a solution by using an innovative structural design to avoid direct contact between transmission components and hazardous waste, thereby achieving efficient and low-loss internal wall cleaning.

[0006] This utility model is achieved through the following technical solution:

[0007] A mixing device for hazardous waste disposal includes: a hazardous waste mixing container, with a discharge valve cover detachably installed at the bottom end of the container; a motor mounted at the top of the container; a hollow stirring shaft mounted at the output end of the motor, extending into the interior of the container, with a sealing end cap detachably installed at the bottom end; multiple mixing blades mounted on the outer wall of the shaft; multiple hollow guide sleeves mounted on the shaft and communicating with its interior; multiple cleaning arms fitted inside the hollow guide sleeves and capable of reciprocating along the axial direction of the sleeves; and a linkage push shaft detachably installed inside the shaft, capable of pushing the cleaning arms against the inner wall of the container.

[0008] Furthermore, in this utility model, the above also includes a return spring; the return spring is fitted on the outside of the cleaning arm, one end of the return spring is connected to the outer wall of the cleaning arm, and the other end of the return spring is connected to the inner wall of the hollow guide sleeve; wherein, when the linkage push shaft releases the thrust on the cleaning arm, the return spring can drive the cleaning arm to retract into the hollow guide sleeve.

[0009] Furthermore, in this utility model, the inner wall of the hollow guide sleeve is provided with a sliding guide groove along the extension direction; the outer wall of the cleaning arm is provided with a guide slider, and the guide slider and the sliding guide groove form a sliding engagement structure.

[0010] Furthermore, in this invention, a guide slope is provided at one end of the cleaning arm near the mixing main shaft, and the guide slope can extend into the interior of the mixing main shaft; wherein, when the linkage push shaft is inserted into the interior of the mixing main shaft, the linkage push shaft can cooperate with the guide slope to guide and cooperate, thereby pushing the cleaning arm to abut against the inner wall of the hazardous waste mixing container.

[0011] Furthermore, in this utility model, the cleaning arm includes a main linkage shaft, a secondary linkage shaft, and an elastic element; one end of the main linkage shaft is fitted inside the hollow guide sleeve, and the other end of the main linkage shaft is provided with an elastic linkage groove; the secondary linkage shaft is at least partially disposed inside the elastic linkage groove, and the secondary linkage shaft can reciprocate along the extension direction of the elastic linkage groove; one end of the elastic element is connected to the bottom wall of the elastic linkage groove, and the other end of the elastic element is connected to the secondary linkage shaft.

[0012] Furthermore, in this invention, the aforementioned stirring spindle is arranged in an axially equidistant array of multiple hollow guide sleeves.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1. This application adopts a purely mechanical transmission structure of a linkage push shaft and a wedge-shaped guide surface, completely eliminating the threaded rod component and fundamentally eliminating the risk of wear on the threaded pair by hard particles. The linkage push shaft directly drives the cleaning arm through axial insertion, avoiding the sliding friction in traditional threaded transmissions and significantly improving the reliability and service life of the transmission system.

[0015] 2. In this application, the cleaning arm adopts a combined structure of a main linkage shaft, a secondary linkage shaft, and an elastic element. Under the action of the elastic element, the secondary linkage shaft can adaptively reciprocate along the elastic linkage groove, thereby closely fitting the inner wall of the hazardous waste mixing container. Even if the inner wall of the container has unevenness or manufacturing errors due to long-term use, the cleaning arm can be adjusted in real time to ensure cleaning effectiveness. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 A perspective view of a mixing device for hazardous waste disposal;

[0018] Figure 2 This is a schematic diagram of the stirring spindle.

[0019] Figure 3 This is a cross-sectional view of the stirring shaft;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a cross-sectional view of the cleaning arm.

[0022] The attached diagram shows the markings and corresponding component names:

[0023] 1- Hazardous waste mixing container, 2- Discharge valve cover, 3- Motor, 4- Agitator shaft, 5- Mixing blade, 6- Hollow guide sleeve, 7- Cleaning arm, 8- Sealing end cap, 9- Guide slope, 10- Linkage push shaft, 11- Sliding guide groove, 12- Guide slider, 13- Main linkage shaft, 14- Secondary linkage shaft, 15- Elastic linkage groove, 16- Elastic component, 17- Return spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0025] To more clearly describe the circuit compatible with multiple interface types provided in the embodiments of this utility model, some terms appearing below will be explained:

[0026] Example

[0027] Please refer to Figures 1 to 3 This utility model provides a mixing device for hazardous waste disposal. The mixing device mainly consists of key components such as a hazardous waste mixing container 1, a motor 3, a hollow guide sleeve 6, a linkage push shaft 10, a cleaning arm 7, and a hollow stirring main shaft 4. The hazardous waste mixing container 1 serves as the core carrier. A discharge valve cover 2 is detachably installed at the bottom of the container, and a sealing ring is used to seal the outlet and the discharge valve cover 2, effectively preventing hazardous waste leakage and ensuring the safe operation of the device. A sealable inlet is provided at the top of the container. Before being added, the hazardous waste is first crushed by a crushing roller. The crushed hazardous waste is then added into the container through the inlet, significantly improving subsequent mixing efficiency.

[0028] Motor 3 is installed at the top of hazardous waste mixing container 1, serving as the power source. Motor 3 is connected to a hollow stirring shaft 4. The stirring shaft 4 is installed at the output end of motor 3 and extends into the interior of hazardous waste mixing container 1. A sealing end cap 8 is detachably installed at the bottom of stirring shaft 4 to prevent hazardous waste from entering the shaft. Multiple mixing blades 5 are installed on the surface of stirring shaft 4. When motor 3 drives stirring shaft 4 to rotate, the multiple mixing blades 5 rotate accordingly, thereby fully mixing the hazardous waste and suitable materials in hazardous waste mixing container 1 to achieve uniform treatment of hazardous waste.

[0029] Multiple hollow guide sleeves 6 are respectively installed on the stirring main shaft 4, and the multiple hollow guide sleeves 6 are internally connected to the stirring main shaft 4. The installation path of the multiple hollow guide sleeves 6 avoids the multiple mixing blades 5, so that the two do not interfere with each other during operation. Multiple cleaning arms 7 are respectively fitted inside the multiple hollow guide sleeves 6. The cleaning arms 7 can reciprocate along the axial direction of the hollow guide sleeves 6. The cleaning arms 7 and the hollow guide sleeves 6 form a sliding seal fit, which on the one hand prevents hazardous waste in the hazardous waste mixing container 1 from entering the hollow guide sleeves 6, and on the other hand ensures the smoothness of the relative movement of the cleaning arms 7 and the hollow guide sleeves 6.

[0030] The linkage push shaft 10 is detachably installed inside the mixing main shaft 4. When mixing hazardous waste, the operator first removes the linkage push shaft 10 from the mixing main shaft 4, and then seals the bottom end of the mixing main shaft 4 with the sealing end cap 8 to prevent hazardous waste from entering the mixing main shaft 4. At this time, the cleaning arm 7 is in the initial position of the hollow guide sleeve 6, and the end of the cleaning arm 7 maintains a safe gap with the inner wall of the hazardous waste mixing container 1. This not only reduces the friction between the cleaning arm 7 and the inner wall of the hazardous waste mixing container 1, reducing the overall energy consumption cost, but also avoids the problem that the generated resistance will interfere with the flow field formed normally by the mixing blades 5, thus reducing the uniformity and flowability of the material mixing. After the mixing main shaft 4 rotates, it drives multiple mixing blades 5 to rotate, mixing the hazardous waste in the hazardous waste mixing container 1. At the same time, the multiple cleaning arms 7 are not in contact with the inner wall of the hazardous waste mixing container 1, and the multiple cleaning arms 7 can also act as mixing components, further improving the mixing efficiency in the hazardous waste mixing container 1.

[0031] After mixing is complete, the operator opens the discharge valve cover 2 at the bottom of the hazardous waste mixing container 1, and the hazardous waste falls into the collection container under gravity. Since the hazardous waste mixing container 1 will leave residues, especially sticky substances, on its inner wall during operation, the operator opens the discharge valve cover 2, then inserts the linkage push shaft 10 into the hazardous waste mixing container 1, and opens the sealing end cover 8 at the bottom of the stirring main shaft 4, inserting the linkage push shaft 10 into the stirring main shaft 4 before closing the sealing end cover 8. The linkage push shaft 10 pushes the cleaning arms 7 to contact the inner wall of the hazardous waste mixing container 1, and then controls the rotation of the stirring main shaft 4, driving the multiple cleaning arms 7 to rotate. This allows the cleaning arms 7 to scrape off the residues on the inner wall of the hazardous waste mixing container 1, achieving the purpose of cleaning the inner wall.

[0032] Please refer to Figure 3 In some embodiments of this application, the return spring 17 is made of a corrosion-resistant alloy and is coaxially sleeved on the outside of the cleaning arm 7. Both ends of the return spring 17 are connected to the outer wall of the cleaning arm 7 and the inner wall of the hollow guide sleeve 6, respectively, forming a closed-loop elastic system. When the cleaning process is completed, the linkage push shaft 10 releases the thrust on the cleaning arm 7, and the return spring 17 immediately releases its elastic potential energy, driving the cleaning arm 7 to retract to its initial position within the hollow guide sleeve 6. This eliminates continuous contact between the cleaning arm 7 and the inner wall of the hazardous waste mixing container 1, effectively avoiding mechanical wear and frictional resistance, and significantly reducing equipment operating energy consumption. Simultaneously, it ensures that the flow field stability is not disturbed during the mixing process, improving the efficiency and quality stability of hazardous waste treatment.

[0033] Please refer to Figure 4 In some embodiments of this application, the inner wall of the hollow guide sleeve 6 is provided with a sliding guide groove 11 along the axial direction, and the surface is treated with tungsten carbide coating to enhance wear resistance and corrosion resistance; the outer wall of the cleaning arm 7 is provided with a corresponding guide slider 12, and the guide slider 12 and the sliding guide groove 11 form a sliding engagement structure.

[0034] Please refer to Figure 3 In some embodiments of this application, the end of the cleaning arm 7 near the stirring spindle 4 is a guide slope 9, which extends into the interior of the stirring spindle 4. When the linkage push shaft 10 is inserted into the stirring spindle 4, the end of the linkage push shaft 10 interacts with the guide slope of the cleaning arm 7. Based on the principle of mechanical transmission of the slope, the thrust applied by the linkage push shaft 10 is decomposed into two components: one component along the axial direction of the hollow guide sleeve 6, which keeps the cleaning arm 7 in a stable sliding guide within the hollow guide sleeve 6, driving the cleaning arm 7 to extend smoothly radially along the hollow guide sleeve 6 until the cleaning arm 7 is in close contact with the inner wall of the hazardous waste mixing container 1, thereby providing reliable mechanical power transmission for subsequent inner wall cleaning operations. The hollow guide sleeve 6 and the cleaning arm 7 are guided together to ensure that the cleaning arm 7 maintains precise posture control during movement, so that the guide slope 9 always maintains optimal contact with the linkage push shaft 10.

[0035] Please refer to Figure 5 In some embodiments of this application, the cleaning arm 7 is composed of a main linkage shaft 13, a secondary linkage shaft 14, and an elastic element 16 (which may be a corrosion-resistant spring): one end of the main linkage shaft 13 is nested inside the hollow guide sleeve 6 to form a sliding seal fit, and the other end of the main linkage shaft 13 is provided with an axially extending elastic linkage groove 15; the secondary linkage shaft 14 is partially housed in the elastic linkage groove 15, and the secondary linkage shaft 14 can slide back and forth along the extension direction of the elastic linkage groove 15 to form a sliding seal structure; both ends of the elastic element 16 are rigidly connected to the bottom wall of the elastic linkage groove 15 and the end of the secondary linkage shaft 14, respectively, to form an elastic buffer system.

[0036] During operation, when the linkage push shaft 10 drives the cleaning arm 7 to contact the inner wall of the hazardous waste mixing container 1, the secondary linkage shaft 14 maintains its initial contact with the inner wall of the hazardous waste mixing container 1 under the pre-tightening force of the elastic element 16. If there are local protrusions or geometric deviations on the inner wall of the hazardous waste mixing container 1, the secondary linkage shaft 14 can axially contract along the elastic linkage groove 15 in real time, absorbing impact energy through the deformation of the elastic element 16; after passing over the obstacle, the elastic element 16 releases its stored energy to push the secondary linkage shaft 14 back to its original position, ensuring that the cleaning end face always maintains a tight fit with the inner wall. This adaptive compensation mechanism effectively avoids the impact of unevenness of the inner wall caused by manufacturing errors of the hazardous waste mixing container 1 or long-term use on the cleaning effect. In addition, a detachable scraper can be configured at the end of the secondary linkage shaft 14, which significantly improves the scraping efficiency of sticky residues and achieves efficient and comprehensive inner wall cleaning function.

[0037] In some embodiments of this application, the stirring shaft 4 is arranged in an axially spaced array of multiple hollow guide sleeves 6 to form uniformly distributed mounting positions for the cleaning arms 7. The inner wall of each hollow guide sleeve 6 is surface-hardened to form a sliding seal with the outer wall of the cleaning arm 7, ensuring smooth axial sliding of the cleaning arm 7 and effectively preventing hazardous waste from seeping into the guide sleeve. This layout design allows the cleaning arm 7 to extend radially under the drive of the linkage push shaft 10, forming a continuous, dead-angle-free scraping trajectory on the inner wall of the container. This ensures that the working areas of each cleaning arm 7 overlap, eliminating blind spots and achieving efficient cleaning of the inner wall of the hazardous waste mixing container 1 of different specifications. This significantly reduces the hazardous waste residue rate and provides a reliable guarantee for subsequent processing steps.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mixing device for hazardous waste disposal, characterized in that, include: Hazardous waste mixing container (1), wherein a discharge valve cover (2) is detachably installed at the bottom end of the hazardous waste mixing container (1); Motor (3), said motor (3) is installed on the top of the hazardous waste mixing container (1); A hollow stirring shaft (4) is installed at the output end of the motor (3) and extends into the interior of the hazardous waste mixing container (1). A sealing end cap (8) is detachably installed at the bottom end of the stirring shaft (4). Multiple mixing blades (5) are mounted on the surface of the stirring shaft (4); Multiple hollow guide sleeves (6) are respectively installed on the stirring main shaft (4), and the multiple hollow guide sleeves (6) are in communication with the interior of the stirring main shaft (4); Multiple cleaning arms (7) are respectively fitted inside multiple hollow guide sleeves (6), and the cleaning arms (7) can reciprocate along the axial direction of the hollow guide sleeves (6); Linkage push shaft (10), which is detachably installed inside the stirring main shaft (4), and the linkage push shaft (10) can push the cleaning arm (7) to abut against the inner wall of the hazardous waste mixing container (1).

2. The mixing device for hazardous waste disposal according to claim 1, characterized in that, It also includes a return spring (17); The reset spring (17) is fitted on the outside of the cleaning arm (7), one end of the reset spring (17) is connected to the outer wall of the cleaning arm (7), and the other end of the reset spring (17) is connected to the inner wall of the hollow guide sleeve (6). When the linkage push shaft (10) releases the thrust on the cleaning arm (7), the reset spring (17) can drive the cleaning arm (7) to retract into the hollow guide sleeve (6).

3. The mixing device for hazardous waste disposal according to claim 2, characterized in that, The inner wall of the hollow guide sleeve (6) is provided with a sliding guide groove (11) along the extension direction; The outer wall of the cleaning arm (7) is provided with a guide slider (12), and the guide slider (12) and the sliding guide groove (11) form a sliding engagement structure.

4. The mixing device for hazardous waste disposal according to claim 3, characterized in that, The cleaning arm (7) is provided with a guide slope (9) at one end near the stirring spindle (4), and the guide slope (9) can extend into the interior of the stirring spindle (4); When the linkage push shaft (10) is inserted into the stirring main shaft (4), the linkage push shaft (10) can be guided and cooperated with the guide inclined surface (9) to push the cleaning arm (7) to abut against the inner wall of the hazardous waste mixing container (1).

5. The mixing device for hazardous waste disposal according to claim 4, characterized in that, The cleaning arm (7) includes a main linkage shaft (13), a secondary linkage shaft (14), and an elastic element (16); One end of the main linkage shaft (13) is fitted inside the hollow guide sleeve (6), and the other end of the main linkage shaft (13) is provided with an elastic linkage groove (15). The secondary linkage shaft (14) is at least partially located inside the elastic linkage groove (15), and the secondary linkage shaft (14) can reciprocate along the extension direction of the elastic linkage groove (15). One end of the elastic element (16) is connected to the bottom wall of the elastic linkage groove (15), and the other end of the elastic element (16) is connected to the secondary linkage shaft (14).

6. The mixing device for hazardous waste disposal according to claim 1, characterized in that, The stirring spindle (4) is arranged in an axially equidistant array of multiple hollow guide sleeves (6).

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