A sodium nitrate crystallization device
By employing a dynamic stirring mode involving crank, rack and pinion linkage, and screw scraping mechanism, the problems of uneven stirring and difficult cleaning in traditional sodium nitrate crystallization devices have been solved, thereby improving the uniformity of crystal suspension and the continuity of production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI YUNRUI CHEM EQUIP CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-06-16
AI Technical Summary
Traditional sodium nitrate crystallization equipment suffers from uneven stirring and easy scaling on the tank walls, resulting in low crystallization uniformity and efficiency, as well as difficulty in cleaning, which affects continuous production.
The crank and rack linkage mechanism drives the regulating disc, which in turn drives three sets of stirring paddles to perform compound motion. Combined with the screw, scraper and telescopic scraper ring mechanism, dynamic stirring and real-time cleaning are achieved, forming a fluid field that alternates between turbulent and laminar flow, eliminating bottom sediment and wall adhesion.
It has achieved improved crystal suspension rate, eliminated bottom deposition and wall adhesion, improved crystallization uniformity and efficiency, reduced heat exchange fluctuations and cleaning difficulty, and extended the continuous production cycle.
Smart Images
Figure CN224358041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sodium nitrate production technology, specifically to a sodium nitrate crystallization device. Background Technology
[0002] Sodium nitrate, as an important inorganic chemical raw material, has a wide range of applications in industrial production. In the glass manufacturing industry, it acts as a clarifying agent and oxidizing agent, effectively reducing the glass melting temperature and improving product transparency. In the ceramics industry, sodium nitrate, as a glaze component, can improve the gloss and stability of the glaze surface. In the metallurgical industry, it is used as an additive in the heat treatment of aluminum alloys and the surface treatment of metals. In these applications, the crystal purity, particle size, and uniformity of sodium nitrate directly affect the performance and quality of the final product. In the sodium nitrate production process, crystallization is a key separation and purification step, and the quality of its process conditions and equipment directly determines the crystallization yield, energy consumption level, and subsequent processing performance.
[0003] Traditional crystallization devices typically employ fixed stirring paddles and static cooling, which can lead to uneven mixing and scaling on the tank walls. Due to the fixed position of the stirring mechanism and the limited stirring range, dead zones can easily form at the edges or bottom of the tank, affecting the uniformity and efficiency of crystallization. Furthermore, crystals tend to adhere to the tank walls and the surface of the stirring paddle, reducing heat transfer efficiency and increasing the difficulty of subsequent cleaning, thus impacting continuous production. To address these issues, we propose a sodium nitrate crystallization device. Utility Model Content
[0004] The purpose of this invention is to provide a sodium nitrate crystallization apparatus to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a sodium nitrate crystallization device, comprising a condenser and a mounting cover, wherein a mounting base is rotatably mounted inside the mounting cover, an adjusting plate is rotatably mounted inside the mounting base, a toothed ring is sleeved on the adjusting plate, a rack is slidably mounted inside the mounting base, the rack is meshed with the toothed ring, a connecting rod is rotatably mounted on the rack, a crank is rotatably mounted inside the mounting base, the crank is rotatably connected to the end of the connecting rod away from the rack via a rotating shaft, three sets of annularly distributed adjusting grooves are provided on the adjusting plate, three sets of annularly distributed guide rails are fixedly mounted inside the mounting base, adjusting frames are slidably mounted in each of the three sets of guide rails, the three sets of adjusting frames are respectively arranged corresponding to the three sets of adjusting grooves, adjusting rods are fixedly mounted on each of the three sets of adjusting frames, the three sets of adjusting rods are slidably connected to the adjusting plate through corresponding adjusting grooves, and stirring paddles are rotatably mounted on each of the three sets of adjusting frames.
[0006] As a further preferred embodiment of this technical solution, a slide rod is fixedly installed inside the mounting base, the rack is slidably sleeved with the slide rod, and two sets of symmetrically distributed springs are sleeved on the slide rod, with the two ends of the two sets of springs respectively fixedly connected to the slide rod and the rack.
[0007] As a further preferred embodiment of this technical solution, a scraper is slidably sleeved on the stirring paddle, and a screw is provided inside the stirring paddle. The two ends of the screw pass through the stirring paddle and are rotatably connected to the stirring paddle through rolling bearings. The screw passes through the scraper and is threadedly connected to the scraper.
[0008] As a further preferred embodiment of this technical solution, two sets of symmetrically distributed sealing rubber strips are fixedly bonded to the stirring paddle, the sealing rubber strips are arranged correspondingly to the screw, and the sealing rubber strips are fixedly bonded to the scraper.
[0009] As a further preferred embodiment of this technical solution, an installation rod is fixedly installed on the installation cover, a first telescopic rod is slidably installed inside the installation rod, a second telescopic rod is slidably installed inside the first telescopic rod, a scraper ring is fixedly installed at the end of the second telescopic rod away from the installation rod, the scraper ring is fitted against the inner wall of the condenser, a threaded rod is rotatably installed inside the installation rod, and a threaded tube is rotatably installed inside the first telescopic rod.
[0010] As a further preferred embodiment of this technical solution, the lower end of the threaded rod passes through the first telescopic rod and is threadedly connected to the first telescopic rod, and the lower end of the threaded tube passes through the second telescopic rod and is threadedly connected to the second telescopic rod.
[0011] As a further preferred embodiment of this technical solution, the threaded rod is provided with two sets of symmetrically distributed keyways, and the threaded tube is provided with two sets of symmetrically distributed key blocks. The key blocks are correspondingly arranged with the keyways, and the threaded tube is slidably sleeved with the threaded rod through the key blocks and keyways.
[0012] This invention provides a sodium nitrate crystallization apparatus, which has the following beneficial effects:
[0013] This invention uses a crank and rack linkage mechanism to drive the adjustment disc to rotate periodically, which in turn drives three sets of stirring paddles to perform a composite motion with adjustable amplitude in the radial and axial directions. When the crank rotates, it pushes the rack to slide along the slide rod through the connecting rod. The gear ring meshing transmission causes the adjustment disc to swing. The adjustment frame constrained by the guide rail realizes the radial extension and retraction of the stirring paddles. At the same time, the spring reset mechanism ensures the continuity of the motion, so that the paddles cover most of the area from the tank center to the tank wall. This dynamic stirring mode can form a fluid field with alternating turbulence and laminar flow, improve the crystal suspension rate, and effectively eliminate bottom deposition and wall adhesion.
[0014] This invention utilizes a dual cleaning system comprised of a screw, scraper mechanism, and telescopic scraper ring built into the agitator. When the agitator rotates, the screw drives the scraper to reciprocate axially along the agitator surface. Combined with the elastic pressing effect of the sealing rubber strip, it can remove crystals from the agitator surface in real time. Simultaneously, the threaded rod and threaded tube transmission mechanism within the mounting rod drive the scraper ring to move up and down along the tank wall via the first and second telescopic rods, achieving real-time cleaning of crystals adhering to the inner wall of the condenser. This extends the continuous operating cycle and eliminates the need for downtime cleaning. Attached Figure Description
[0015] Figure 1 This is a front view schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the left-side cross-sectional view of the condenser of this utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the mounting base and the stirring paddle in the separated state of this utility model;
[0018] Figure 4 This utility model Figure 3 Enlarged structural diagram of A in the middle;
[0019] Figure 5 This is a schematic diagram of the internal structure of the mounting bracket of this utility model.
[0020] In the diagram: 1. Condenser; 2. Mounting cover; 3. Mounting base; 4. Adjusting disc; 5. Gear ring; 6. Gear rack; 7. Slide rod; 8. Spring; 9. Connecting rod; 10. Crank; 11. Guide rail; 12. Adjusting frame; 13. Adjusting rod; 14. Adjusting groove; 15. Mounting rod; 16. First telescopic rod; 17. Second telescopic rod; 18. Scraper ring; 19. Threaded rod; 20. Keyway; 21. Threaded pipe; 22. Key block; 23. Agitator; 24. Scraper block; 25. Screw; 26. Sealing rubber strip. Detailed Implementation
[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0022] This utility model provides a technical solution: such as Figures 1-4As shown in this embodiment, a sodium nitrate crystallization device includes a condenser tank 1 and a mounting cover 2. A mounting base 3 is rotatably mounted inside the mounting cover 2. An adjusting disc 4 is rotatably mounted inside the mounting base 3. A toothed ring 5 is sleeved on the adjusting disc 4. A rack 6 is slidably mounted inside the mounting base 3, meshing with the toothed ring 5. A connecting rod 9 is rotatably mounted on the rack 6. A crank 10 is rotatably mounted inside the mounting base 3, and the crank 10 is rotatably connected to the end of the connecting rod 9 away from the rack 6 via a rotating shaft. The adjusting disc 4 has three sets of annularly distributed adjusting grooves 14. Three sets of annularly distributed guide rails 11 are fixedly mounted inside the mounting base 3. Adjusting frames 12 are slidably mounted inside each of the three sets of guide rails 11. The three sets of adjusting frames 12 are respectively arranged corresponding to the three sets of adjusting grooves 14. Adjusting rods 13 are fixedly mounted on each of the three sets of adjusting frames 12, and the three sets of adjusting rods 13 are slidably mounted on the adjusting disc 4 through their respective adjusting grooves 14. The three sets of adjustment frames 12 are rotatably mounted with stirring paddles 23. A slide rod 7 is fixedly installed in the mounting base 3. The rack 6 is slidably sleeved with the slide rod 7. Two sets of symmetrically distributed springs 8 are sleeved on the slide rod 7. The two ends of the two sets of springs 8 are fixedly connected to the slide rod 7 and the rack 6, respectively. The motor in the mounting base 3 drives the crank 10 to rotate. The crank 10 drives the connecting rod 9 to make a circular motion through the rotating shaft, pushing the rack 6 to slide back and forth along the slide rod 7. Through the meshing transmission of the gear ring 5, the adjustment disk 4 is driven to oscillate periodically. The three sets of adjustment grooves 14 on the adjustment disk 4 and the adjustment frame 12 constrained by the guide rail 11 form a sliding pair, which converts the rotational motion into the radial extension and retraction motion of the stirring paddle 23. At the same time, the stirring paddle 23 rotates around its own axis. The spring 8 assembly provides the restoring force to ensure that the rack 6 and the gear ring 5 are continuously meshed, so that the stirring paddle 23 can be dynamically adjusted within a certain radial range to form a three-dimensional stirring flow field covering the entire cross section of the tank, thereby improving the uniformity of crystal suspension.
[0023] like Figure 3 and Figure 5As shown, a scraper 24 is slidably sleeved on the stirring paddle 23. A screw 25 is provided inside the stirring paddle 23. Both ends of the screw 25 pass through the stirring paddle 23 and are rotatably connected to the stirring paddle 23 via rolling bearings. The screw 25 passes through the scraper 24 and is threadedly connected to the scraper 24. Two sets of symmetrically distributed sealing rubber strips 26 are fixedly adhered to the stirring paddle 23. The sealing rubber strips 26 are correspondingly arranged with the screw 25 and are fixedly adhered to the scraper 24. An installation rod 15 is fixedly installed on the mounting cover 2. A first telescopic rod 16 is slidably installed inside the mounting rod 15, and a second telescopic rod 17 is slidably installed inside the first telescopic rod 16. A scraper ring 18 is fixedly installed at the end of the second telescopic rod 17 away from the mounting rod 15. The scraper ring 18 is fitted against the inner wall of the condenser tank 1. A threaded rod 19 is rotatably installed inside the mounting rod 15, and a threaded tube 21 is rotatably installed inside the first telescopic rod 16. The lower end of the threaded rod 19 passes through the first telescopic rod 16 and is threadedly connected to it. The lower end of the threaded tube 21 passes through the second telescopic rod 17 and... The threaded rod 19 is threadedly connected to the second telescopic rod 17. Two sets of symmetrically distributed keyways 20 are provided on the threaded rod 19. Two sets of symmetrically distributed key blocks 22 are provided inside the threaded tube 21. The key blocks 22 correspond to the keyways 20. The threaded tube 21 is slidably sleeved with the threaded rod 19 through the key blocks 22 and keyways 20. The motor inside the mounting rod 15 drives the threaded rod 19 to rotate. Under the constraint of the key blocks 22 and keyways 20, the threaded tube 21 rotates synchronously and moves axially along the threaded rod 19 with the first telescopic rod 16. Simultaneously, the internal thread of the threaded tube 21 drives the second telescopic rod 17. The two telescopic rods 17 extend or retract relative to the first telescopic rod 16 to achieve compound stroke adjustment of the scraper ring 18. This two-stage transmission mechanism effectively expands the stroke of the scraper ring 18. The anti-rotation design of the keyway 20 ensures that the threaded tube 21 only moves axially. The scraper ring 18 always adheres to the tank wall with constant pressure, effectively cleaning the crystals on the inner wall of the condenser tank 1 and reducing heat exchange fluctuations. During the rotation of the motor-driven screw 25 in the agitator 23, the scraper 24 moves axially back and forth along the surface of the agitator 23. Combined with the elastic pressing effect of the sealing rubber strip 26, the crystals on the agitator surface can be removed in real time.
[0024] This invention provides a sodium nitrate crystallization device. The specific working principle is as follows: The motor in the mounting base 3 drives the crank 10 to rotate. The crank 10 drives the connecting rod 9 to rotate via the shaft, pushing the rack 6 to slide back and forth along the slide rod 7. Through the meshing transmission of the gear ring 5, the adjusting disc 4 is driven to oscillate periodically. The three sets of adjusting grooves 14 on the adjusting disc 4 and the adjusting frame 12 constrained by the guide rail 11 form a sliding pair, converting the rotational motion into the radial extension and retraction motion of the stirring paddle 23. Simultaneously, the stirring paddle 23 rotates around its own axis. The spring 8 assembly provides a restoring force, ensuring that the rack 6 and the gear ring 5 continuously mesh, allowing the stirring paddle 23 to dynamically adjust within a certain radial range, forming a three-dimensional stirring flow field covering the entire cross-section of the tank. This improves the uniformity of crystal suspension. The motor in the mounting rod 15 drives... As the threaded rod 19 rotates, the threaded tube 21 rotates synchronously under the constraint of the key block 22 and the keyway 20, and moves axially along the threaded rod 19 with the first telescopic rod 16. At the same time, the internal thread of the threaded tube 21 drives the second telescopic rod 17 to extend or retract relative to the first telescopic rod 16, realizing the compound stroke adjustment of the scraper ring 18. This two-stage transmission mechanism effectively expands the stroke of the scraper ring 18. The anti-rotation design of the keyway 20 ensures that the threaded tube 21 only moves axially. The scraper ring 18 always adheres to the tank wall with constant pressure, effectively cleaning the crystals on the inner wall of the condenser tank 1 and reducing heat exchange fluctuations. During the rotation of the motor-driven screw 25 in the agitator 23, the scraper 24 moves axially back and forth along the surface of the agitator 23. With the elastic pressing action of the sealing rubber strip 26, the crystals on the agitator surface can be removed in real time.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sodium nitrate crystallization apparatus, characterized in that: The system includes a condenser (1) and a mounting cover (2). A mounting base (3) is rotatably mounted inside the mounting cover (2). An adjusting disc (4) is rotatably mounted inside the mounting base (3). A gear ring (5) is fitted onto the adjusting disc (4). A rack (6) is slidably mounted inside the mounting base (3). The rack (6) meshes with the gear ring (5). A connecting rod (9) is rotatably mounted on the rack (6). A crank (10) is rotatably mounted inside the mounting base (3). The crank (10) is rotatably connected to the end of the connecting rod (9) away from the rack (6) via a rotating shaft. The adjusting disc... The disc (4) has three sets of annularly distributed adjustment grooves (14). The mounting base (3) has three sets of annularly distributed guide rails (11). Each of the three sets of guide rails (11) has an adjustment frame (12) slidably installed inside. Each of the three sets of adjustment frames (12) is respectively set to correspond to the three sets of adjustment grooves (14). Each of the three sets of adjustment frames (12) has an adjustment rod (13) slidably installed on it. Each of the three sets of adjustment rods (13) is slidably connected to the adjustment disc (4) through the corresponding adjustment grooves (14). Each of the three sets of adjustment frames (12) has a stirring paddle (23) rotatably installed on it.
2. The sodium nitrate crystallization apparatus according to claim 1, characterized in that: A slide rod (7) is fixedly installed inside the mounting base (3). The rack (6) is slidably sleeved with the slide rod (7). Two sets of symmetrically distributed springs (8) are sleeved on the slide rod (7). The two ends of the two sets of springs (8) are fixedly connected to the slide rod (7) and the rack (6) respectively.
3. The sodium nitrate crystallization apparatus according to claim 1, characterized in that: A scraper (24) is slidably sleeved on the stirring paddle (23). A screw (25) is provided inside the stirring paddle (23). The two ends of the screw (25) pass through the stirring paddle (23) and are rotatably connected to the stirring paddle (23) through rolling bearings. The screw (25) passes through the scraper (24) and is threadedly connected to the scraper (24).
4. The sodium nitrate crystallization apparatus according to claim 1, characterized in that: Two sets of symmetrically distributed sealing rubber strips (26) are fixedly bonded to the stirring paddle (23). The sealing rubber strips (26) are arranged corresponding to the screw (25), and the sealing rubber strips (26) are fixedly bonded to the scraper (24).
5. The sodium nitrate crystallization apparatus according to claim 1, characterized in that: An installation rod (15) is fixedly installed on the mounting cover (2). A first telescopic rod (16) is slidably installed inside the installation rod (15). A second telescopic rod (17) is slidably installed inside the first telescopic rod (16). A scraper ring (18) is fixedly installed at the end of the second telescopic rod (17) away from the installation rod (15). The scraper ring (18) is fitted against the inner wall of the condenser (1). A threaded rod (19) is rotatably installed inside the installation rod (15). A threaded tube (21) is rotatably installed inside the first telescopic rod (16).
6. A sodium nitrate crystallization apparatus according to claim 5, characterized in that: The lower end of the threaded rod (19) passes through the first telescopic rod (16) and is threadedly connected to the first telescopic rod (16). The lower end of the threaded tube (21) passes through the second telescopic rod (17) and is threadedly connected to the second telescopic rod (17).
7. A sodium nitrate crystallization apparatus according to claim 5, characterized in that: The threaded rod (19) has two sets of symmetrically distributed keyways (20), and the threaded tube (21) has two sets of symmetrically distributed key blocks (22). The key blocks (22) are correspondingly arranged with the keyways (20), and the threaded tube (21) is slidably sleeved with the threaded rod (19) through the key blocks (22) and the keyways (20).