A high-concentration nitric acid waste liquid recycling device

Abstract

The utility model discloses a kind of recycling equipment of high-concentration nitric acid waste liquid, it is related to nitric acid recovery technical field, including the reaction box of vertical placement, the support cover is fixedly connected with in reaction box top middle, the motor is fixedly connected with in support cover top;Machine output end is fixedly connected with universal joint, the driving gear is fixedly connected with in universal joint outside, the first turntable is rotatably connected with in reaction box top middle, the gear ring is fixedly connected with in first turntable top.This kind of recycling equipment of high-concentration nitric acid waste liquid, by inner transmission rod and outer transmission rod drive two groups of stirring vane reverse rotation, form strong shearing force and turbulent effect, make waste liquid and reactant produce full collision mixing, can also effectively reduce local concentration gradient, substantially improve reaction rate and recovery uniformity, two groups of stirring vane and motor axis present 10 ° angle of special arrangement of clamping, further expand the stirring coverage, eliminate reaction dead angle.

Description

Technical Field

[0001] This utility model relates to the field of nitric acid recovery technology, specifically to a device for the recovery and utilization of high-concentration nitric acid waste liquid. Background Technology

[0002] Nitric acid waste liquid recycling refers to the process of treating and reusing waste liquid containing nitric acid. Nitric acid waste liquid is commonly generated in industrial production processes, including chemical synthesis, metal surface treatment, and laboratories. Direct discharge of nitric acid waste liquid leads to environmental pollution, therefore, it needs to be recycled and treated.

[0003] Chinese patent (publication number: CN218686800U) discloses a recycling component and a waste liquid recycling device, belonging to the field of waste liquid recycling technology. The recycling component and waste liquid recycling device include a recycling tank, inside which a material collection hopper and a material collection pipe are fixedly connected. A filter screen is fixedly connected to the bottom of the material collection hopper, and a waste residue storage box is fixedly connected to the top of the recycling tank. The two ends of the material collection pipe are located above the filter screen and inside the waste residue storage box, respectively. The material collection pipe is inclined, and a drive motor is fixedly connected to the waste residue storage box. The spiral material collection shaft discharges the residue filtered through the filter screen to prevent clogging. Simultaneously, the filtered waste liquid enters a processing tank. Through the cooperation of a stirring shaft, processing box, air pump, and other devices installed in the processing tank, the waste liquid is stirred, and the gas generated by the waste liquid is filtered. The filtered gas is then discharged back into the waste liquid to promote the stirring effect.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist during their operation: the recovery of nitric acid waste liquid requires the addition of a neutralizing agent for harmless treatment, thus necessitating stirring to ensure thorough mixing of the nitric acid waste liquid and the neutralizing agent. However, in existing technologies, insufficient stirring during nitric acid waste liquid recovery leads to uneven mixing of the neutralizing agent and the nitric acid waste liquid. Utility Model Content

[0005] The purpose of this invention is to provide a high-concentration nitric acid waste liquid recycling device to solve the problem in the prior art mentioned above, where insufficient stirring during nitric acid waste liquid recycling leads to uneven mixing of the neutralizing agent and the nitric acid waste liquid.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-concentration nitric acid waste liquid recycling device, comprising a vertically placed reaction tank, a support cover fixedly connected to the top center of the reaction tank, and a motor fixedly connected to the top of the support cover;

[0007] The motor output end extends into the inside of the support cover, and a universal joint is fixedly connected to the motor output end. A drive gear is fixedly connected to the outside of the universal joint. A first turntable is rotatably connected to the top center of the reaction tank, and a gear ring is fixedly connected to the top of the first turntable.

[0008] Preferably, a transmission gear is rotatably connected inside the support cover, and the outer side of the transmission gear meshes with the outer side of the drive gear. The transmission gear is fixedly connected to a reduction gear via a connecting rod, and the reduction gear meshes with the inner side of the gear ring.

[0009] Preferably, a coaxial reverse structure is fixedly connected to the bottom of the first turntable. The coaxial reverse structure includes a mounting bracket fixedly connected to the bottom of the first turntable. A main drive bevel gear is rotatably connected to the top inner side of the mounting bracket, and the main drive bevel gear is fixedly connected to a universal joint.

[0010] Preferably, an inner transmission rod is fixedly connected to the end of the main drive bevel gear away from the universal joint, and transmission bevel gears are rotatably connected to both sides inside the mounting bracket. A secondary drive bevel gear is rotatably connected to the bottom of the mounting bracket, and the inner transmission rod passes through the interior of the secondary drive bevel gear. The transmission bevel gear meshes with the main drive bevel gear and the secondary drive bevel gear respectively.

[0011] Preferably, an external transmission rod is fixedly connected to the end of the auxiliary drive bevel gear away from the transmission bevel gear, and the auxiliary drive bevel gear is fixedly connected to the external transmission rod. A second stirring blade is fixedly connected to the outer side of the lower end of the external transmission rod, and a first stirring blade is fixedly connected to the outer side of the lower end of the inner transmission rod. The first stirring blade and the second stirring blade rotate in opposite directions, and both the inner transmission rod and the outer transmission rod form a 10° angle with the axis of the motor.

[0012] Preferably, a partition is fixedly connected inside the reaction chamber, and the partition divides the inside of the reaction chamber into upper and lower parts. Both sides of the partition are provided with feeding ports that communicate with the outside of the reaction chamber, and the ends of the feeding ports are connected to the lower half of the reaction chamber. A pressure valve extending to the top of the reaction chamber is provided at the top of the partition.

[0013] Preferably, a second turntable is rotatably connected in the middle of the partition, and a sealing sleeve is eccentrically provided inside the second turntable, with the outer transmission rod rotatably connected inside the sealing sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This high-concentration nitric acid waste liquid recycling equipment uses an inner and outer drive rod to drive two sets of stirring blades to rotate in opposite directions, forming a strong shear force and turbulence effect, which makes the waste liquid and reactants fully collide and mix. It can also effectively reduce the local concentration gradient, greatly improve the reaction rate and recycling uniformity. The special arrangement of the two sets of stirring blades at a 10° angle to the motor axis further expands the stirring coverage area and eliminates reaction dead zones.

[0016] The sealing system adopts an eccentric dynamic sealing structure. The design of the second rotating disc and the sealing sleeve effectively prevents waste liquid leakage. This structure can maintain good sealing performance even under high-speed rotation conditions, which not only protects the upper transmission components from corrosion, but also prevents the leakage of harmful substances, significantly improving the safety of the equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the reaction chamber of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the support cover of this utility model;

[0020] Figure 4 This is a schematic diagram of the universal joint structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the stirring blade structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the second turntable structure of this utility model.

[0023] In the diagram: 1. Reaction chamber; 2. Support cover; 3. Motor; 4. Universal joint; 5. Drive gear; 6. First turntable; 7. Gear ring; 8. Transmission gear; 9. Reduction gear; 10. Mounting bracket; 11. Main drive bevel gear; 12. Inner transmission rod; 13. Transmission bevel gear; 14. Secondary drive bevel gear; 15. Outer transmission rod; 16. First stirring blade; 17. Second stirring blade; 18. Baffle plate; 19. Feed port; 20. Second turntable; 21. Sealing sleeve. Detailed Implementation

[0024] 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 some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6 This utility model provides the following technical solution: a high-concentration nitric acid waste liquid recycling device, including a vertically placed reaction tank 1, a support cover 2 fixedly connected to the top center of the reaction tank 1, and a motor 3 fixedly connected to the top of the support cover 2; the output end of the motor 3 extends into the interior of the support cover 2, and a universal joint 4 is fixedly connected to the output end of the motor 3; a drive gear 5 is fixedly connected to the outside of the universal joint 4; a first turntable 6 is rotatably connected to the top center of the reaction tank 1, and a gear ring 7 is fixedly connected to the top of the first turntable 6; a transmission gear 8 is rotatably connected inside the support cover 2, and the transmission gear 8 and the drive gear are rotatably connected to each other. 5. The outer sides mesh with each other. The transmission gear 8 is fixedly connected to the reduction gear 9 via a connecting rod, and the reduction gear 9 meshes with the inner side of the gear ring 7. The bottom of the first turntable 6 is fixedly connected to a coaxial reverse structure, which includes a mounting bracket 10 fixedly connected to the bottom of the first turntable 6. The top inner side of the mounting bracket 10 is rotatably connected to the main drive bevel gear 11, and the main drive bevel gear 11 is fixedly connected to the universal joint 4. The end of the main drive bevel gear 11 away from the universal joint 4 is fixedly connected to the inner transmission rod 12. Both sides of the inside of the mounting bracket 10 are rotatably connected to transmission bevel gears 13. The bottom of the mounting bracket 10 A secondary drive bevel gear 14 is rotatably connected, and an inner transmission rod 12 passes through the interior of the secondary drive bevel gear 14. A transmission bevel gear 13 meshes with both the main drive bevel gear 11 and the secondary drive bevel gear 14. An outer transmission rod 15 is fixedly connected to the end of the secondary drive bevel gear 14 furthest from the transmission bevel gear 13, and the secondary drive bevel gear 14 is fixedly connected to the outer transmission rod 15. A second stirring blade 17 is fixedly connected to the outer side of the lower end of the outer transmission rod 15, and a first stirring blade 16 is fixedly connected to the outer side of the lower end of the inner transmission rod 12. The first stirring blade 16 and the second stirring blade 17 rotate in opposite directions. Both the transmission rod 12 and the outer transmission rod 15 form a 10° angle with the axis of the motor 3. A partition 18 is fixedly connected inside the reaction chamber 1, and the partition 18 divides the interior of the reaction chamber 1 into upper and lower parts. Both sides of the partition 18 are provided with feeding ports 19 that communicate with the outside of the reaction chamber 1, and the ends of the feeding ports 19 are connected to the lower half of the reaction chamber 1. A pressure valve extending to the top of the reaction chamber 1 is provided at the top of the partition 18. A second turntable 20 is rotatably connected in the middle of the partition 18. A sealing sleeve 21 is eccentrically arranged inside the second turntable 20, and the outer transmission rod 15 is rotatably connected inside the sealing sleeve 21.

[0026] First, when the equipment is started, the motor 3 starts running, driving the universal joint 4 to rotate through its output end. The rotational motion of the universal joint 4 is transmitted to the drive gear 5. Since the drive gear 5 meshes with the outer side of the transmission gear 8, the transmission gear 8 rotates accordingly. The transmission gear 8 is fixedly connected to the reduction gear 9 through a connecting rod, and the reduction gear 9 meshes with the inner side of the gear ring 7. This causes the gear ring 7 to rotate at a lower speed under the deceleration effect. The gear ring 7 is fixed on the top of the first turntable 6, so the first turntable 6 also rotates accordingly.

[0027] The rotation of the first turntable 6 drives the coaxial reverse structure at its bottom to move. This structure includes a mounting bracket 10, with the main drive bevel gear 11 rotatably connected to the top inner side of the mounting bracket 10. Since the main drive bevel gear 11 is fixedly connected to the universal joint 4, the power of the universal joint 4 is directly input to the main drive bevel gear 11. The end of the main drive bevel gear 11 away from the universal joint 4 is fixedly connected to the inner transmission rod 12. At the same time, the transmission bevel gears 13 on both sides inside the mounting bracket 10 mesh with the main drive bevel gear 11. The transmission bevel gear 13 also meshes with the auxiliary drive bevel gear 14. The auxiliary drive bevel gear 14 is fixed on the outer transmission rod 15. The inner transmission rod 12 passes through the interior of the auxiliary drive bevel gear 14, forming a coaxial but reverse transmission mechanism. When the main drive bevel gear 11 rotates in the forward direction, the auxiliary drive bevel gear 14 rotates in the reverse direction through the conversion action of the transmission bevel gear 13. This design allows the inner transmission rod 12 and the outer transmission rod 15 to drive their respective stirring components to move in opposite directions.

[0028] The lower outer side of the inner drive rod 12 is fixedly connected to the first stirring blade 16, while the lower outer side of the outer drive rod 15 is fixedly connected to the second stirring blade 17. Since both the inner drive rod 12 and the outer drive rod 15 form a 10° angle with the axis of the motor 3, the stirring action is ensured to cover a wider area inside the reaction tank 1, reducing dead zones. The first stirring blade 16 and the second stirring blade 17, which rotate in opposite directions, generate efficient shearing force. When the first stirring blade 16 rotates clockwise and the second stirring blade 17 rotates counterclockwise, eddies and turbulence effects are formed, causing the waste liquid to collide and mix strongly. This reverse stirring mechanism accelerates the diffusion and reaction rate of high-concentration nitric acid waste liquid with reactants, reduces the local concentration gradient, and improves the uniformity and efficiency of nitric acid recovery.

[0029] The partition 18 is fixedly connected inside the reaction chamber 1, dividing the interior of the chamber into upper and lower parts. The upper part mainly contains mechanical components, while the lower part is the main reaction zone. Both sides of the partition 18 are provided with feeding ports 19, and the ends of the feeding ports 19 are connected to the lower part of the reaction chamber 1. In actual operation, high-concentration nitric acid waste liquid is introduced into the lower part of the reaction chamber 1 through one feeding port 19, while the neutralizing agent is added through the other feeding port 19. The pressure valve at the top of the partition 18 extends to the top of the reaction chamber 1 and plays a pressure regulating role. When stirring triggers a chemical reaction that produces gas, the pressure valve automatically opens to release excess gas, maintain internal pressure balance, and prevent overpressure damage to the equipment.

[0030] The second turntable 20 is rotatably connected to the middle of the partition 18, and an eccentrically arranged sealing sleeve 21 is provided inside it. The outer drive rod 15 is rotatably connected to the inside of the sealing sleeve 21. When the outer drive rod 15 rotates, the second turntable 20 rotates accordingly. The sealing sleeve 21 provides dynamic sealing to prevent waste liquid from leaking from the gap between the turntables to the area above the partition 18. The eccentric design of the sealing sleeve 21 enhances the sealing effect and can maintain the airtightness of the reaction chamber 1 even under high-speed rotation, ensuring a safe working environment and reducing the risk of leakage of harmful substances.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A high-concentration nitric acid waste liquid recycling device, comprising a vertically placed reaction tank (1), wherein a support cover (2) is fixedly connected to the middle of the top of the reaction tank (1), and a motor (3) is fixedly connected to the top of the support cover (2); Its features are: The output end of the motor (3) extends into the inside of the support cover (2), and the output end of the motor (3) is fixedly connected to a universal joint (4). A drive gear (5) is fixedly connected to the outside of the universal joint (4). A first turntable (6) is rotatably connected to the top center of the reaction tank (1), and a gear ring (7) is fixedly connected to the top of the first turntable (6).

2. The equipment for recycling high-concentration nitric acid waste liquid according to claim 1, characterized in that: The support cover (2) is rotatably connected to a transmission gear (8), and the outer side of the transmission gear (8) meshes with the outer side of the drive gear (5). The transmission gear (8) is fixedly connected to a reduction gear (9) via a connecting rod, and the reduction gear (9) meshes with the inner side of the gear ring (7).

3. The high-concentration nitric acid waste liquid recycling equipment according to claim 1, characterized in that: The bottom of the first turntable (6) is fixedly connected to a coaxial reverse structure. The coaxial reverse structure includes a mounting bracket (10) fixedly connected to the bottom of the first turntable (6). The top inner side of the mounting bracket (10) is rotatably connected to a main drive bevel gear (11), and the main drive bevel gear (11) is fixedly connected to a universal joint (4).

4. The high-concentration nitric acid waste liquid recycling equipment according to claim 3, characterized in that: The main drive bevel gear (11) is fixedly connected to an inner transmission rod (12) at the end away from the universal joint (4). Both sides of the mounting bracket (10) are rotatably connected to transmission bevel gears (13). The bottom of the mounting bracket (10) is rotatably connected to a secondary drive bevel gear (14). The inner transmission rod (12) passes through the interior of the secondary drive bevel gear (14), and the transmission bevel gear (13) meshes with the main drive bevel gear (11) and the secondary drive bevel gear (14) respectively.

5. The equipment for recycling high-concentration nitric acid waste liquid according to claim 4, characterized in that: The auxiliary drive bevel gear (14) is fixedly connected to an outer drive rod (15) at the end away from the transmission bevel gear (13), and the auxiliary drive bevel gear (14) is fixedly connected to the outer drive rod (15). The outer side of the lower end of the outer drive rod (15) is fixedly connected to a second stirring blade (17), and the outer side of the lower end of the inner drive rod (12) is fixedly connected to a first stirring blade (16). The first stirring blade (16) and the second stirring blade (17) rotate in opposite directions, and both the inner drive rod (12) and the outer drive rod (15) form a 10° angle with the axis of the motor (3).

6. The high-concentration nitric acid waste liquid recycling equipment according to claim 1, characterized in that: The reaction chamber (1) is fixedly connected to a partition (18), which divides the interior of the reaction chamber (1) into upper and lower parts. Both sides of the partition (18) are provided with feeding ports (19) that are connected to the outside of the reaction chamber (1), and the end of the feeding port (19) is connected to the lower half of the reaction chamber (1). The top of the partition (18) is provided with a pressure valve that extends to the top of the reaction chamber (1).

7. The high-concentration nitric acid waste liquid recycling equipment according to claim 6, characterized in that: The partition (18) is rotatably connected to a second turntable (20), and a sealing sleeve (21) is eccentrically provided inside the second turntable (20), and the outer transmission rod (15) is rotatably connected inside the sealing sleeve (21).

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