Equipment and method for preparing sodium nitrate

Abstract

This invention relates to the field of sodium nitrate processing equipment technology, and discloses a sodium nitrate preparation equipment and preparation method, including a tank, four support frames fixedly connected to the outer wall of the tank, and a feed pipe connected through the top of the tank. This invention addresses the problem of some crystals solidifying on the inner wall of the tank due to high temperature. It incorporates a limiting mechanism and a floating mechanism inside the equipment. When the motor drives the stirring frame to agitate via a drive rod, the vortex-like solution generates rotational force. This rotational force drives the mounting ring to rotate via the floating component. The rotating mounting ring then drives the arc-shaped rubber rod to rotate circumferentially via the fixed frame. During this process, the arc-shaped rubber rod scrapes against the inner wall of the tank. When large ripples appear on the liquid surface due to agitation, the arc-shaped rubber rod can promptly scrape and remove the liquid from the inner wall of the tank, effectively reducing the total amount of crystals adhering to the inner wall of the tank due to high temperature.

Description

Technical Field

[0001] This invention relates to the field of sodium nitrate processing equipment technology, specifically to a sodium nitrate preparation equipment and preparation method. Background Technology

[0002] Sodium nitrate is an inorganic compound that appears as hygroscopic, colorless, transparent trigonal crystals. It decomposes when heated to 380°C. Molten salt products are mainly used in the preparation of solar molten salts. Evaporation crystallization is a crucial step in sodium nitrate production. The core of this process is to concentrate the sodium nitrate solution through evaporation until the solution reaches a supersaturated state, thereby causing sodium nitrate to crystallize and precipitate, ultimately obtaining the sodium nitrate product that meets the requirements.

[0003] In practical applications, the sodium nitrate solution is agitated by the stirring rod inside the reactor, resulting in excessively large ripples on the liquid surface. When these ripples come into contact with the inner wall of the reactor, the liquid surface surges upwards. The surging solution carries some crystals that adhere to the inner wall of the reactor. As the temperature of the reactor rises, the crystals dry and stick tightly to the inside of the reactor, affecting subsequent cleaning processes. To address these issues, the following solutions are proposed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a sodium nitrate preparation device and preparation method, including a tank, four support frames fixedly connected to the outer wall of the tank, a feed pipe and an outlet pipe connected through the top of the tank, a motor fixedly connected to the center of the top of the tank, a drive rod fixedly connected to the output end of the motor, and a stirring frame fixedly connected to the end of the drive rod away from the motor, and further comprising:

[0005] The drive mechanism is slidably mounted on the outer wall of the drive rod.

[0006] A limiting mechanism is fixedly installed on the outer wall of the drive mechanism;

[0007] A floating mechanism is fixedly installed on the bottom outer wall of the drive mechanism;

[0008] The floating mechanism provides buoyancy to the driving and restraining mechanisms and ensures that the driving and restraining mechanisms are always submerged below the liquid surface.

[0009] Preferably, the drive mechanism includes:

[0010] The latching assembly is slidably disposed on the outer wall of the drive rod;

[0011] A pressing component is fixedly installed on the outer wall of the snap-fit ​​component;

[0012] The floating mechanism provides buoyancy to the latching assembly and the pressing assembly. The buoyancy drives the latching assembly to slide upward along the inner wall of the drive rod through the pressing assembly.

[0013] Preferably, the limiting mechanism includes:

[0014] Deformation component, the deformation component is fixedly installed at the bottom of the pressing component;

[0015] The scraping component is fixedly installed on the outer wall of the pressing component;

[0016] When the stirring rack agitates the solution inside the tank, the solution will drive the pressing component and the limiting mechanism to rotate in the same direction through the floating component.

[0017] Preferably, the floating mechanism includes:

[0018] A floating component is fixedly installed at the bottom of the pressing component;

[0019] The agitated solution will generate a vortex, which will drive the pressing component to rotate through the floating component.

[0020] Preferably, the buckle assembly includes a sliding ring slidably connected to the outer wall of the drive rod, a slot is provided on the inner inclined surface of the sliding ring, and an inclined block is fixedly connected to the outer wall of the drive rod;

[0021] As the solution inside the tank decreases, the liquid level drops, and the pressing component will drive the sliding ring to move downwards synchronously, so that the slot fits into the inclined block.

[0022] Preferably, the pressing assembly includes a fixing frame 1 fixedly connected to the outer wall of the sliding ring, a mounting ring fixedly connected to the outer wall of the fixing frame 1, and five sets of tripods fixedly connected to the inner wall of the mounting ring.

[0023] Each of the five tripod sets contains three supports, and the three supports are of different sizes.

[0024] Preferably, the deformation component includes four fixing blocks fixedly connected to the bottom of a fixing frame, and metal springs are fixedly connected to the bottom of the fixing blocks;

[0025] In normal conditions, the metal shrapnel is in a state of inward contraction.

[0026] Preferably, the scraping component includes a fixing bracket two fixedly connected to the top of the mounting ring, and an arc-shaped rubber rod fixedly connected to the side wall of the fixing bracket two, with an arc-shaped groove opened on the side of the arc-shaped rubber rod near the tank body;

[0027] In normal conditions, the outer wall of the arc-shaped rubber rod is attached to the inner wall of the tank, and the height of the arc-shaped rubber rod exceeds the liquid surface. When the floating component drives the mounting ring to rotate, the arc-shaped rubber rod will slide along the inner wall of the tank.

[0028] Preferably, the floating assembly includes a floating plate fixedly connected to the bottom of the mounting ring, and an arc-shaped plate fixedly connected to the side wall of the floating plate;

[0029] The floating plate is made of lightweight material and will be completely submerged in the liquid under normal conditions, ensuring that the liquid level is flush with the top of the second fixed frame.

[0030] A method for preparing sodium nitrate includes the following steps:

[0031] S1: Installation setup: Before use, fix the support frame in the required position and ensure that the outside of the tank is in close contact with the heating device to ensure that the heating device can heat the solution inside the tank through the tank;

[0032] S2: Filling with solution: Fill the inlet with a sufficient amount of solution through the inlet pipe;

[0033] S3: Power on: The motor drives the stirring rack through the drive rod to stir the solution inside the tank, causing sodium nitrate to crystallize and precipitate under high temperature.

[0034] The present invention has the following beneficial effects:

[0035] (1) This invention addresses the problem of some crystals solidifying on the inner wall of the tank due to high temperature. It incorporates a limiting mechanism and a floating mechanism inside the equipment. When the equipment is initially started, the liquid level inside the tank is high. Driven by the buoyancy of the floating component, the floating component will bring the pressing component and the snap-fit ​​component below the liquid level, presenting a state as follows: Figure 2 In this state, when the motor drives the stirring frame to agitate via the drive rod, the vortex-shaped solution will generate rotational force. This rotational force will drive the mounting ring to rotate via the floating component. The rotating mounting ring will drive the arc-shaped rubber rod to rotate circumferentially via the fixed frame. During this process, the arc-shaped rubber rod will scrape against the inner wall of the tank. Through the application of the above components, when the liquid surface produces large ripples due to agitation, the arc-shaped rubber rod can promptly scrape and remove the ripples from the inner wall of the tank, effectively reducing the total amount of liquid that adheres to the inner wall of the tank due to high temperature.

[0036] (2) To address the problem that the arc-shaped rubber rod cannot effectively scrape against excessively high liquid level fluctuations, this invention provides five sets of tripods inside the equipment. The tripods are fixed to the inner walls of the fixing frame and the mounting ring, forming a shape as shown in the image. Figure 5As shown, when the liquid surface of the solution rises, it is covered by multiple tripods below the liquid surface. This causes the liquid surface to bear resistance from the tripods again during the actual flow process. Under this resistance, the liquid surface will have difficulty generating effective undulations. By using the above components, the height of the solution surface is effectively reduced, preventing the excessive height from affecting the cleaning efficiency of the arc-shaped rubber rod.

[0037] (3) The present invention utilizes the characteristics of the solution being heated and evaporating, and the liquid level slowly moving downward. A drive mechanism is set inside the equipment. As the solution inside the tank is heated and generates water vapor, the high-temperature water vapor will rise and come into contact with the outer wall of the fixing frame. The crystals attached to the outer wall of the pressing component dissolve under the influence of the high-temperature steam and merge with the water vapor to condense into water droplets. The water droplets diffuse outward under the action of the centrifugal force of the pressing component and attach to the inner wall of the tank. Finally, they flow downward along the inner wall of the tank. Through the application of the above components, it is effective to prevent crystals from adhering to the drive mechanism and increasing the difficulty of subsequent cleaning.

[0038] (4) This invention utilizes the characteristic of water droplets expanding outward under the influence of centrifugal force. Multiple tripods are set with their tips facing outward. When water droplets are flung outward under the influence of centrifugal force, the water droplets will flow along the outer wall of the tripods first and finally be flung outward at the tip. Through the above component design, the limited crystals are fused with more water vapor, reducing the concentration of water droplets after condensation. This effectively prevents the high-concentration solution formed after the crystals and water vapor combine from undergoing secondary crystallization on the inner wall of the tank due to high temperature, which would affect subsequent cleaning. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0042] Figure 3 This is a cross-sectional schematic diagram of the drive mechanism of the present invention;

[0043] Figure 4 This is a schematic diagram of the driving mechanism of the present invention;

[0044] Figure 5 This is a cross-sectional schematic diagram of the pressing component of the present invention;

[0045] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0046] Figure 7 This is a schematic diagram of the snap-fit ​​assembly of the present invention;

[0047] Figure 8 This is a partial schematic diagram of the limiting mechanism of the present invention;

[0048] Figure 9 This is a partial schematic diagram of the scraping component of the present invention;

[0049] Figure 10 For the present invention Figure 9 Enlarged view of point B in the middle;

[0050] Figure 11 For the present invention Figure 9 Enlarged view of point C in the middle;

[0051] Figure 12 This is a schematic diagram of the workflow of the present invention.

[0052] The attached diagram lists the components represented by each number as follows:

[0053] In the diagram: 1. Drive mechanism; 2. Restriction mechanism; 3. Floating mechanism; 11. Buckle assembly; 12. Pressing assembly; 13. Tank body; 14. Support frame; 15. Feed pipe; 16. Motor; 17. Drive rod; 18. Stirring frame; 19. Air outlet pipe; 21. Deformation assembly; 22. Scraping assembly; 31. Floating assembly; 111. Sliding ring; 112. Slot; 113. Inclined block; 121. Fixing frame one; 122. Mounting ring; 123. Triangular frame; 211. Fixing block; 212. Metal spring; 221. Fixing frame two; 222. Arc-shaped rubber rod; 223. Arc-shaped groove; 311. Floating plate; 312. Arc-shaped plate. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Example 1, please refer to Figures 1-11This invention relates to a sodium nitrate preparation apparatus and method, comprising a tank 13, four support frames 14 fixedly connected to the outer wall of the tank 13, an inlet pipe 15 and an outlet pipe 19 connected to the top of the tank 13, a motor 16 fixedly connected to the center of the top of the tank 13, a drive rod 17 fixedly connected to the output end of the motor 16, and a stirring frame 18 fixedly connected to the end of the drive rod 17 away from the motor 16. The apparatus also includes:

[0056] Drive mechanism 1 is slidably disposed on the outer wall of drive rod 17;

[0057] Restriction mechanism 2 is fixedly installed on the outer wall of drive mechanism 1;

[0058] The floating mechanism 3 is fixedly installed on the bottom outer wall of the drive mechanism 1;

[0059] The floating mechanism 3 provides buoyancy to the driving mechanism 1 and the restraining mechanism 2, and ensures that the driving mechanism 1 and the restraining mechanism 2 are always submerged below the liquid surface.

[0060] Drive mechanism 1 includes:

[0061] The latching assembly 11 is slidably disposed on the outer wall of the drive rod 17;

[0062] The pressing component 12 is fixedly disposed on the outer wall of the snap-fit ​​component 11;

[0063] The floating mechanism 3 provides buoyancy to the buckle assembly 11 and the pressing assembly 12. The buoyancy drives the buckle assembly 11 to slide upward along the inner wall of the drive rod 17 through the pressing assembly 12.

[0064] Restricted agency 2 includes:

[0065] Deformation component 21 is fixedly disposed at the bottom of pressing component 12;

[0066] The scraping component 22 is fixedly installed on the outer wall of the pressing component 12;

[0067] When the stirring rack 18 agitates the solution inside the tank 13, the solution will drive the pressing assembly 12 and the limiting mechanism 2 to rotate in the same direction through the floating assembly 31.

[0068] The floating mechanism 3 includes:

[0069] The floating component 31 is fixedly installed at the bottom of the pressing component 12;

[0070] To address the issue of some crystals solidifying on the inner wall of tank 13 due to high temperature, a limiting mechanism 2 and a floating mechanism 3 are installed inside the equipment. When the equipment officially starts, the liquid level inside tank 13 is high. Driven by the buoyancy of the floating component 31, the floating component 31 will pull the pressing component 12 and the locking component 11 below the liquid level, presenting a state as follows: Figure 2 The state.

[0071] Example 2, please refer to Figures 4-12 The present invention is a sodium nitrate preparation device and preparation method. Based on Example 1, the buckle assembly 11 includes a sliding ring 111 slidably connected to the outer wall of the drive rod 17, a slot 112 is provided on the inclined surface of the inner wall of the sliding ring 111, and an inclined block 113 is fixedly connected to the outer wall of the drive rod 17.

[0072] When the solution inside the tank 13 decreases, the liquid level drops, and the pressing component 12 will drive the sliding ring 111 to move downward synchronously, so that the slot 112 fits into the inclined block 113.

[0073] The pressing assembly 12 includes a fixing frame 121 fixedly connected to the outer wall of the sliding ring 111, an mounting ring 122 fixedly connected to the outer wall of the fixing frame 121, and five sets of tripods 123 fixedly connected to the inner wall of the mounting ring 122.

[0074] Taking advantage of the characteristic that water droplets expand outward under the influence of centrifugal force, multiple tripods 123 are set with their tips facing outward. When water droplets are thrown outward under the influence of centrifugal force, the water droplets will preferentially flow along the outer wall of the tripod 123 and finally be thrown outward at the tip. Through the above component design, a limited number of crystals can be fused with more water vapor, reducing the concentration of water droplets after condensation. This effectively prevents the high-concentration solution formed after the crystals and water vapor combine from undergoing secondary crystallization on the inner wall of the tank 13 due to high temperature, which would affect subsequent cleaning.

[0075] The deformation component 21 includes four fixing blocks 211 fixedly connected to the bottom of the fixing frame 121, and metal spring pieces 212 are fixedly connected to the bottom of the fixing blocks 211.

[0076] To address the issue that the curved rubber rod 222 cannot effectively scrape against excessively high liquid level fluctuations, five sets of tripods 123 are installed inside the equipment. The tripods 123 are fixed to the inner walls of the fixing frame 121 and the mounting ring 122, forming a shape as follows: Figure 5 As shown, when the liquid surface of the solution rises, it is covered by multiple tripods 123 below the liquid surface. This causes the liquid surface to bear resistance from the tripods 123 again during the actual flow process. Under this resistance, the liquid surface will have difficulty generating effective undulations. By using the above components, the height of the solution surface is effectively reduced, preventing the excessive height from affecting the cleaning efficiency of the arc-shaped rubber rod 222.

[0077] The scraping component 22 includes a fixing bracket 221 fixedly connected to the top of the mounting ring 122. An arc-shaped rubber rod 222 is fixedly connected to the side wall of the fixing bracket 221. An arc-shaped groove 223 is provided on the side of the arc-shaped rubber rod 222 near the tank body 13.

[0078] When the motor 16 drives the stirring frame 18 to agitate via the drive rod 17, the vortex-shaped solution will generate rotational force, which will drive the mounting ring 122 to rotate via the floating component 31. The rotating mounting ring 122 will drive the arc-shaped rubber rod 222 to rotate circumferentially via the fixing frame 221. During this process, the arc-shaped rubber rod 222 will scrape against the inner wall of the tank 13. Through the application of the above components, when the liquid surface has large ripples due to agitation, the arc-shaped rubber rod 222 can scrape and remove the liquid from the inner wall of the tank 13 in time, effectively reducing the total amount of liquid that adheres to the inner wall of the tank 13 due to high temperature.

[0079] The floating assembly 31 includes a floating plate 311 fixedly connected to the bottom of the mounting ring 122, and an arc-shaped plate 312 fixedly connected to the side wall of the floating plate 311.

[0080] The vortex-shaped solution will impact the arc-shaped plate 312, and drive the mounting ring 122 to rotate through the floating plate 311;

[0081] As the liquid level drops, the floating assembly 31 will carry the pressing assembly 12 downwards in sync. During this process, the fixing frame 121 will drive the deformation assembly 21 to slide downwards along the outer wall of the drive rod 17. Eventually, the end of the metal spring 212 will contact the outer wall of the inclined block 113. At this time, the metal spring 212 will provide a certain supporting force for the fixing frame 121, ensuring that the fixing frame 121 cannot move directly downwards. As the liquid level continues to drop, the buoyancy of the floating assembly 31 also decreases synchronously. This causes the weight of the fixing frame 121, the limiting mechanism 2, and the floating mechanism 3 to act directly on the position of the metal spring 212, causing the metal spring 212 to move downwards from the liquid level. Figure 6 The state changes to Figure 11In this state, the slot 112 will be directly engaged with the outer wall of the inclined block 113. At this time, the pressure of the rotating drive rod 17 will drive the fixing frame 121 to rotate rapidly, and the rapidly rotating fixing frame 121 will generate centrifugal force. At the same time, as the solution inside the tank 13 is heated and generates water vapor, the high-temperature water vapor will rise and come into contact with the outer wall of the fixing frame 121. The crystals attached to the outer wall of the pressing component 12 will dissolve under the influence of the high-temperature steam and merge with the water vapor to condense into water droplets. Under the action of the centrifugal force of the pressing component 12, the water droplets will diffuse outward and adhere to the inner wall of the tank 13, and finally flow down along the inner wall of the tank 13. Through the application of the above components, it is effective to prevent crystals from adhering to the drive mechanism 1, which would increase the difficulty of subsequent cleaning.

[0082] A method for preparing sodium nitrate includes the following steps:

[0083] S1: Installation setup: Before use, fix the support frame 14 in the required position and ensure that the outside of the tank 13 is in close contact with the heating device to ensure that the heating device can heat the solution inside the tank through the tank 13;

[0084] S2: Filling with solution: Fill the inlet with a sufficient amount of solution through the feed pipe 15;

[0085] S3: Power on: Motor 16 drives the stirring rack 18 through drive rod 17 to stir the solution inside tank 13, causing sodium nitrate to crystallize and precipitate under high temperature.

[0086] One specific application of this embodiment is as follows: Before use, the support frame 14 is fixed in the required position, and the outside of the tank 13 is in close contact with the heating device. After ensuring that the heating device can heat the solution inside the tank 13, a sufficient amount of solution is poured into the tank through the feed pipe 15. Then, the motor 16 drives the stirring frame 18 through the drive rod 17 to stir the solution inside the tank 13. Under high temperature environment, sodium nitrate crystals precipitate out, completing the basic preparation process.

[0087] To address the issue of some crystals solidifying on the inner wall of tank 13 due to high temperature, a limiting mechanism 2 and a floating mechanism 3 are installed inside the equipment. When the equipment officially starts, the liquid level inside tank 13 is high. Driven by the buoyancy of the floating component 31, the floating component 31 will pull the pressing component 12 and the locking component 11 below the liquid level, presenting a state as follows: Figure 2In the state where the motor 16 drives the stirring frame 18 to agitate via the drive rod 17, the vortex-shaped solution will generate rotational force, and this rotational force will drive the mounting ring 122 to rotate via the floating component 31. The rotating mounting ring 122 will drive the arc-shaped rubber rod 222 to rotate circumferentially via the fixing frame 221. During this process, the arc-shaped rubber rod 222 will scrape against the inner wall of the tank 13. Through the application of the above components, when the liquid surface has large ripples due to agitation, the arc-shaped rubber rod 222 can scrape and remove the liquid from the inner wall of the tank 13 in time, effectively reducing the total amount of liquid that adheres to the inner wall of the tank 13 due to high temperature.

[0088] To address the issue that the curved rubber rod 222 cannot effectively scrape against excessively high liquid level fluctuations, five sets of tripods 123 are installed inside the equipment. The tripods 123 are fixed to the inner walls of the fixing frame 121 and the mounting ring 122, forming a shape as follows: Figure 5 As shown, when the liquid surface of the solution rises, because the liquid surface is covered by multiple tripods 123, the liquid surface needs to withstand the resistance from the tripods 123 again during the actual flow process. Under this resistance, the liquid surface will have difficulty generating effective undulations. By using the above components, the height of the solution surface is effectively reduced, preventing the excessive height from affecting the cleaning efficiency of the arc-shaped rubber rod 222.

[0089] In addition, when the arc-shaped rubber rod 222 scrapes against the inner wall of the tank 13, most of the small crystals will accumulate inside the arc-shaped groove 223. When the liquid surface rises again, the rising solution will impact the crystals inside the arc-shaped groove 223 and drive the crystals downward, effectively preventing crystals from accumulating at the position of the arc-shaped rubber rod 222.

[0090] Taking advantage of the characteristic of the solution evaporating upon heating and the slow downward movement of the liquid level, a drive mechanism 1 is installed inside the equipment. As the liquid level drops, the floating component 31 carries the pressing component 12 downwards synchronously. During this process, the fixing frame 121 drives the deformation component 21 to slide downwards along the outer wall of the drive rod 17. Eventually, the end of the metal spring 212 contacts the outer wall of the inclined block 113, providing support to the fixing frame 121 and preventing it from moving directly downwards. As the liquid level continues to drop, the buoyancy of the floating component 31 also decreases synchronously. This causes the weight of the fixing frame 121, the limiting mechanism 2, and the floating mechanism 3 to directly act on the position of the metal spring 212, causing the metal spring 212 to... Figure 6 The state changes to Figure 11In this state, the slot 112 will be directly locked onto the outer wall of the inclined block 113. At this time, the pressure of the rotating drive rod 17 will drive the fixing frame 121 to rotate rapidly, and the rapidly rotating fixing frame 121 will generate centrifugal force. At the same time, as the solution inside the tank 13 is heated and generates water vapor, the high-temperature water vapor will rise and come into contact with the outer wall of the fixing frame 121. The crystals attached to the outer wall of the pressing component 12 will dissolve under the influence of the high-temperature steam and merge with the water vapor to condense into water droplets. The water droplets will diffuse outward under the action of the centrifugal force of the pressing component 12 and attach to the inner wall of the tank 13, and finally flow down along the inner wall of the tank 13. Through the application of the above components, it is effective to prevent crystals from adhering to the drive mechanism 1 and increasing the difficulty of subsequent cleaning.

[0091] Taking advantage of the characteristic that water droplets expand outward under the influence of centrifugal force, multiple tripods 123 are set with their tips facing outward. When water droplets are thrown outward under the influence of centrifugal force, the water droplets will preferentially flow along the outer wall of the tripod 123 and finally be thrown outward at the tip. Through the above component design, a limited number of crystals can be fused with more water vapor, reducing the concentration of water droplets after condensation. This effectively prevents the high-concentration solution formed after the crystals and water vapor combine from undergoing secondary crystallization on the inner wall of the tank 13 due to high temperature, which would affect subsequent cleaning.

[0092] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sodium nitrate preparation apparatus, comprising a tank (13), wherein four support frames (14) are fixedly connected to the outer wall of the tank (13), an inlet pipe (15) is connected through the top of the tank (13), an outlet pipe (19) is connected through the top of the tank (13), a motor (16) is fixedly connected to the center of the top of the tank (13), a drive rod (17) is fixedly connected to the output end of the motor (16), and a stirring frame (18) is fixedly connected to the end of the drive rod (17) away from the motor (16), characterized in that, Also includes: The drive mechanism (1) is slidably disposed on the outer wall of the drive rod (17); A limiting mechanism (2) is fixedly installed on the outer wall of the driving mechanism (1); A floating mechanism (3) is fixedly installed on the bottom outer wall of the drive mechanism (1); The floating mechanism (3) provides buoyancy to the driving mechanism (1) and the restraining mechanism (2), and ensures that the driving mechanism (1) and the restraining mechanism (2) are always submerged below the liquid surface; The drive mechanism (1) includes: The snap-fit ​​assembly (11) is slidably disposed on the outer wall of the drive rod (17); A pressing component (12) is fixedly disposed on the outer wall of the snap-fit ​​component (11); The floating mechanism (3) provides buoyancy to the buckle assembly (11) and the pressing assembly (12), and the buoyancy drives the buckle assembly (11) to slide upward along the inner wall of the drive rod (17) through the pressing assembly (12).

2. The sodium nitrate preparation apparatus according to claim 1, characterized in that: The limiting mechanism (2) includes: Deformation component (21), the deformation component (21) is fixedly disposed at the bottom of the pressing component (12); A scraping component (22) is fixedly disposed on the outer wall of the pressing component (12); When the stirring rack (18) agitates the solution inside the tank (13), the solution will drive the pressing assembly (12) and the limiting mechanism (2) to rotate in the same direction through the floating assembly (31).

3. The sodium nitrate preparation apparatus according to claim 2, characterized in that: The floating mechanism (3) includes: A floating component (31) is fixedly disposed at the bottom of the pressing component (12); The agitated solution will generate a vortex, and the floating component (31) will drive the pressing component (12) to rotate.

4. The sodium nitrate preparation apparatus according to claim 3, characterized in that: The buckle assembly (11) includes a sliding ring (111) slidably connected to the outer wall of the drive rod (17), a slot (112) is provided on the inner inclined surface of the sliding ring (111), and an inclined block (113) is fixedly connected to the outer wall of the drive rod (17). When the solution inside the tank (13) decreases, the liquid level drops, and the pressing component (12) will drive the sliding ring (111) to move downward synchronously, so that the slot (112) fits into the inclined block (113).

5. The sodium nitrate preparation apparatus according to claim 4, characterized in that: The pressing assembly (12) includes a fixing frame (121) fixedly connected to the outer wall of the sliding ring (111), an mounting ring (122) fixedly connected to the outer wall of the fixing frame (121), and five sets of tripods (123) fixedly connected to the inner wall of the mounting ring (122). Each of the five tripods (123) contains three supports, and the three supports are of different sizes.

6. The sodium nitrate preparation apparatus according to claim 5, characterized in that: The deformation component (21) includes four fixing blocks (211) fixedly connected to the bottom of the fixing frame (121), and a metal spring sheet (212) is fixedly connected to the bottom of the fixing block (211). In this case, the metal shrapnel (212) is in a state of inward contraction under normal conditions.

7. The sodium nitrate preparation apparatus according to claim 6, characterized in that: The scraping component (22) includes a fixing frame two (221) fixedly connected to the top of the mounting ring (122), and an arc-shaped rubber rod (222) is fixedly connected to the side wall of the fixing frame two (221). The arc-shaped rubber rod (222) has an arc-shaped groove (223) on the side near the tank (13). In normal conditions, the outer wall of the arc-shaped rubber rod (222) is attached to the inner wall of the tank (13), and the height of the arc-shaped rubber rod (222) exceeds the liquid surface. When the floating component (31) drives the mounting ring (122) to rotate, the arc-shaped rubber rod (222) will slide along the inner wall of the tank (13).

8. The sodium nitrate preparation apparatus according to claim 7, characterized in that: The floating assembly (31) includes a floating plate (311) fixedly connected to the bottom of the mounting ring (122), and an arc-shaped plate (312) is fixedly connected to the side wall of the floating plate (311). Among them, the floating plate (311) is made of lightweight material and will be completely submerged below the liquid surface under normal conditions, ensuring that the liquid surface is flush with the top of the second fixing frame (221). The vortex-shaped solution will impact the arc plate (312) and drive the mounting ring (122) to rotate through the floating plate (311).

9. A method for preparing sodium nitrate, using the sodium nitrate preparation equipment as described in claim 8, characterized in that: Includes the following steps, S1: Installation setup: Before use, fix the support frame (14) in the required position and ensure that the outside of the tank (13) is in close contact with the heating device, so that the heating device can heat the solution inside the tank through the tank (13); S2: Filling with solution: Fill the solution into the inlet pipe (15) with a sufficient amount of solution; S3: Power on: The motor (16) drives the stirring rack (18) through the drive rod (17) to stir the solution inside the tank (13), causing sodium nitrate to crystallize and precipitate under high temperature.

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