Anti-caking stirring and cleaning scraping equipment for lime preparation tank

Abstract

The utility model discloses a kind of anti-caking stirring cleaning scraping equipment for lime preparation tank, including tank body, tank cover is arranged on the tank body, the central position of the tank cover is penetrated and is rotatably connected with stirring shaft, horizontal arm is arranged on the stirring shaft, vertical arm is connected on the horizontal arm, the end of the vertical arm is equipped with parallel arm, first flexible scraper is arranged on the horizontal arm, second flexible scraper is arranged on the vertical arm, scraper is arranged on the parallel arm.The utility model is integrated with cleaning scraping assembly by stirring shaft, while stirring and mixing raw materials, horizontal arm drives first flexible scraper to prevent tank top from being blocked, vertical arm drives second flexible scraper to remove wall-hanging object of tank wall, scraper is scraped to center with tank bottom deposit, cooperate with broken mechanism to break and reuse or discharge through deslag valve, realize comprehensive cleaning in tank, improve production efficiency, reduce maintenance cost, ensure continuous and stable operation of production.

Description

Technical Field

[0001] This utility model mainly relates to the field of lime preparation technology, specifically to an anti-caking stirring and scraping device for lime preparation tanks. Background Technology

[0002] In industrial fields such as water treatment and chemical processing, lime slurry serves as an important treatment agent and reaction medium, and its preparation process is highly dependent on the core equipment—the lime mixing tank. Currently, the industry commonly uses paddle mixers to mix lime powder and liquid in the tank to prepare lime slurry that meets process requirements.

[0003] Currently, paddle mixers are commonly used for lime preparation. The mixing force of these mixers primarily acts on the central area of ​​the tank, with limited effect on lime powder and slurry in areas such as below the top inlet, on the tank walls, and in the corners of the bottom. Lime slurry easily adheres to, deposits, and hardens in these areas, forming hard caking deposits. This leads to problems such as feed blockage, reduced effective volume, increased mixing load, and unstable slurry concentration. Maintaining and cleaning these caking deposits is extremely difficult, requiring prolonged manual knocking and scraping after machine shutdown. This is not only labor-intensive and poses safety risks, but also seriously affects the continuity and stability of production. Utility Model Content

[0004] This utility model addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. It primarily offers an anti-caking stirring and scraping device for lime mixing tanks. This addresses the issues raised in the background section, where existing lime mixing methods often employ paddle mixers. These mixers concentrate their stirring force only in the middle of the tank, offering minimal effect on lime powder and slurry below the top inlet, on the tank walls, and in the corners of the bottom. This allows lime slurry to easily adhere to, deposit, and harden into caking deposits in these areas, leading to problems such as feed blockage, reduced effective tank volume, increased stirring load, and unstable slurry concentration. Furthermore, maintaining and cleaning these caking deposits is difficult, requiring prolonged manual removal after machine shutdown. This not only involves high labor intensity and safety risks but also severely impacts production continuity and stability.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A stirring and scraping device for preventing caking in lime preparation tanks includes a tank body, a tank cover, a stirring shaft that is rotatably connected through the center of the tank cover, a horizontal arm on the stirring shaft, a vertical arm connected to the horizontal arm, a parallel arm at the end of the vertical arm, a first flexible scraper on the horizontal arm, a second flexible scraper on the vertical arm, a scraper on the parallel arm, and a crushing mechanism at the lower end of the stirring shaft.

[0006] More preferably, the bottom of the tank is designed as a conical structure inclined towards the center, and the scraper is arranged at an angle of 45°-60° with the bottom of the tank.

[0007] Furthermore, the back of the scraper is fitted with a counterweight for force balance.

[0008] More preferably, the horizontal arm, vertical arm and parallel arm constitute a set of mounting components, and there are multiple sets of mounting components, and all sets of stirring components are evenly distributed in a ring with the vertical center line of the stirring shaft as the axis.

[0009] More preferably, at least one first flexible scraper is installed on the horizontal arm, the first flexible scraper being a flexible scraper with its working surface closely attached to the bottom of the can lid.

[0010] More preferably, the second flexible scraper is a flexible scraper blade, the working surface of which matches the inner curved surface of the tank wall and maintains a tight fit.

[0011] More preferably, the bottom of the tank is provided with a slag discharge port, and a valve is installed at the slag discharge port. The crushing mechanism is correspondingly arranged at the slag discharge port, and the crushing mechanism adopts a crushing blade structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The cleaning and scraping components integrated on the stirring shaft operate synchronously as the shaft rotates. While the stirring shaft mixes the raw materials, the horizontal arm drives the first flexible scraper to continuously scrape off the material adhering to the feed inlet area on the inner wall of the tank cover, effectively preventing blockage. The vertical arm drives the second flexible scraper to remove the wall-mounted material inside the tank, keeping the tank clean and improving material utilization. The scraper scrapes the sediment at the bottom of the tank to the central area, where it is crushed and reused by the crushing mechanism, or the waste residue is discharged centrally through the slag discharge valve. This achieves comprehensive cleaning of all areas inside the tank, improves production efficiency, reduces maintenance costs, and ensures continuous and stable production.

[0013] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the full cross-section of the present invention.

[0015] Numbering on the map: 1. Tank body; 2. Tank lid; 3. Stirring shaft; 4. Horizontal arm; 5. Vertical arm; 6. Parallel arm; 7. First flexible scraper; 8. Second flexible scraper; 9. Scraper; 10. Crushing mechanism. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Please refer to the appendix carefully. Figures 1-2 A stirring and scraping device for preventing caking in lime preparation tanks includes a tank body 1, a tank cover 2 on the tank body 1, a stirring shaft 3 rotatably connected through the center of the tank cover 2, a drive motor on the tank cover 2, the output end of the drive motor being connected to the stirring shaft 3, a horizontal arm 4 on the stirring shaft 3, a vertical arm 5 connected to the horizontal arm 4, a parallel arm 6 at the end of the vertical arm 5, a first flexible scraper 7 mounted on the horizontal arm 4 via a hinge seat and a pre-tension spring, a second flexible scraper 8 mounted on the vertical arm 5 via a hinge seat and a pre-tension spring, a scraper 9 on the parallel arm 6, and a crushing mechanism 10 at the lower end of the stirring shaft 3.

[0019] In this embodiment, as Figure 2 As shown, the bottom of the tank body 1 is designed as a conical structure inclined towards the center, and the scraper 9 is arranged at an angle of 45°-60° with the bottom of the tank body 1. A counterweight for force balance is installed on the back of the scraper 9 away from the bottom of the tank. The counterweight is made of cast iron or stainless steel and is fixed to the scraper 9 by bolts. The position of the counterweight can be adjusted according to the vibration monitoring data during actual operation. When the scraper 9 rotates with the stirring shaft 3, it can scrape and gather the large particles of sediment settled at the bottom of the tank towards the central area of ​​the bottom of the tank. The material of the scraper 9 can be stainless steel lined with rubber or ultra-high molecular weight polyethylene and other wear-resistant and corrosion-resistant materials.

[0020] Through the above structure, the inclined conical tank bottom, in conjunction with the scraper 9 at a specific angle, provides a guiding path for the sediment, which can scrape the particles dispersed at various parts of the tank bottom toward the central area, and gather the sediment into a small central area, creating favorable conditions for subsequent centralized slag discharge.

[0021] The 45°-60° tilt angle allows the scraper 9 to generate a strong radial force pointing towards the center when rotating, thus smoothly guiding and converging the lime deposits to the central discharge port at the bottom of the conical tank, just like a spiral guide vane, preventing bottom caking and material residue at the discharge port. At the same time, this angle prevents the scraper 9 from being perpendicular to the direction of movement, reducing forward resistance and preventing excessive torque and equipment overload caused by excessive accumulation and compaction of material in front of the scraper 9, ensuring a smooth cleaning process.

[0022] If the angle of scraper 9 is less than 45°, the area in front of scraper 9 increases, leading to a sharp increase in resistance to pushing the material forward. This not only significantly increases the operating load and energy consumption of the stirring shaft 3, but also causes severe material accumulation and compaction in front of scraper 9, and may even cause motor overload, making it impossible to achieve a smooth scraping and collection effect. Conversely, if the angle is greater than 60°, the thrust generated by scraper 9 will mainly be tangential, making it difficult to form a radial component pointing towards the center. This causes the sediment to be carried by scraper 9 in a circular motion at the bottom of the tank, and cannot be guided to the central discharge port, thus completely losing the core function of scraping and collecting. Therefore, the angle range of 45°-60° is the best balance achieved between avoiding excessive resistance and ensuring effective pushing.

[0023] The counterweight can balance the radial and axial force deviations caused by the large tilt angle of the scraper 9, reduce the extra load on the bearings of the stirring shaft 3 and the tank cover 2, extend the service life of the transmission system, reduce the vibration value of the equipment, and avoid bolt loosening or structural fatigue caused by vibration.

[0024] In this embodiment, as Figure 2 As shown, the horizontal arm 4, the vertical arm 5, and the parallel arm 6 constitute a set of mounting components. There are multiple sets of these mounting components, and all sets of stirring components are evenly distributed in a ring around the vertical center line of the stirring shaft 3.

[0025] With the above structure, multiple sets of components are symmetrically and evenly arranged, so that the forces on the stirring shaft 3 in each direction are balanced when it rotates. It can also be used to install multiple scrapers, which increases the frequency and density of cleaning and improves the cleaning efficiency per unit time.

[0026] In this embodiment, as Figure 2 As shown, at least one first flexible scraper 7 is installed on the horizontal arm 4. The first flexible scraper 7 is a flexible scraper or rubber strip. Its working surface is closely attached to the bottom of the can cover 2 when rotating, and is used to scrape off the attached material in the area below the feed port on the can cover 2.

[0027] With the above structure, the flexible scraper can fit tightly against the irregular or slightly deformed inner wall of the can lid 2, avoiding jamming or wear on the can wall due to excessive rigidity. When the horizontal arm 4 rotates, it can directly clean the area directly below the feed inlet, scraping off the lime powder or slurry that has just fallen in and has not yet solidified, preventing the formation of blockages and ensuring smooth feeding.

[0028] In this embodiment, as Figure 2 As shown, the second flexible scraper 8 adopts a flexible scraper blade, whose working surface matches the inner curved surface of the tank wall of the tank body 1 and maintains a tight fit. It is used to scrape off the wall-hanging material attached to the inner wall of the tank body 1. The first flexible scraper 7 at different heights can be installed on multiple vertical arms 5 to cover different heights. The material of the flexible scraper blade / rubber strip can be polyurethane, wear-resistant rubber or ultra-high molecular weight polyethylene, etc. The scraper and other vulnerable parts can be inspected and replaced regularly.

[0029] With the above structure, the flexible scraper can adapt well to the curvature of the tank wall of the tank 1, ensuring that it always maintains close contact with the tank wall during operation, thereby continuously scraping off the wall-attached material. Compared with the rigid scraper, the flexible scraper provides scraping force while causing less damage to the metal tank wall, avoiding scratches and wear that may be caused by hard scraping, and extending the service life of the tank 1.

[0030] In this embodiment, as Figure 2 As shown, the bottom of the tank 1 is provided with a slag discharge port, and a valve is installed at the slag discharge port. The valve can be a pneumatic or electric butterfly valve and can be connected to the central control system. The crushing mechanism 10 is correspondingly set at the slag discharge port position, and the crushing mechanism 10 uses crushing blades or crushing saw teeth, which are distributed in a cross shape. The blade material is high chromium cast iron.

[0031] With the above structure, the crushing blades are placed directly above the slag discharge port, which can pre-crush the sediment that has gathered there, breaking large particles into smaller pieces. This prevents the slag discharge port itself from being blocked by large particles, ensuring a smooth slag discharge process. For non-recoverable impurities or excessive sediment, they can be discharged periodically through the slag discharge port, adapting to different working conditions and process requirements.

[0032] The specific operating procedure of this utility is as follows: First, the drive motor is started, which drives the stirring shaft 3 to rotate, thereby driving the stirring shaft 3 to rotate. The blades on the stirring shaft 3 stir and mix the raw materials in the tank.

[0033] Simultaneously, the horizontal arm 4 fixed at the top of the stirring shaft 3 rotates accordingly. The first flexible scraper 7, such as a flexible scraper or rubber strip, installed on the horizontal arm 4 rotates synchronously. Its working surface is always in close contact with the inner wall of the tank cover 2. During the rotation, the first flexible scraper 7 continuously scrapes off the lime powder that has just fallen in and has not yet been wetted by the slurry or the semi-dried slurry that has adhered to this area, so that it falls into the flowing slurry zone in the middle of the tank 1 to participate in the mixing, thereby completely avoiding the problem of blockage caused by the accumulation and hardening of materials below the feed inlet.

[0034] The vertical arm 5 at the lower part of the stirring shaft 3 rotates together with the shaft, and the second flexible scraper 8 installed on it also closely adheres to the inner curved surface of the inner wall of the tank 1. Since the lime slurry is very easy to splash and adhere to the tank wall during the stirring process, forming a gradually thickening wall layer, the second flexible scraper 8 removes these wall adhering materials through continuous scraping action, so that they return to the slurry flow in the main body of the tank.

[0035] The scraper 9 at the bottom of the stirring shaft 3 rotates at an angle of 45-60° with the inclined tank bottom. The scraper 9 continuously scrapes the coarser lime particles or sediments that have settled to various parts of the tank bottom, especially the edges and corners, towards and collects them in the central area of ​​the bottom of the tank body 1, and then they can be discharged through the valve at the bottom.

[0036] The crushing mechanism 10 installed at the bottom of the stirring shaft 3 rotates like blades, breaking up and crushing the scraped lumps or particles, turning them back into fine particles and participating in the slurry circulation, thus realizing the reuse of materials. The sediment is scraped to the top of the slag discharge port at the bottom center of the tank 1 and the slag discharge valve is opened by the control system at regular intervals or automatically to discharge the waste residue that cannot be crushed or does not need to be recycled.

[0037] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A stirring and scraping device for preventing caking in lime preparation tanks, comprising a tank body (1), characterized in that: The tank body (1) is provided with a tank cover (2), and a stirring shaft (3) is rotatably connected through the center of the tank cover (2). A horizontal arm (4) is provided on the stirring shaft (3), and a vertical arm (5) is connected to the horizontal arm (4). A parallel arm (6) is provided at the end of the vertical arm (5). A first flexible scraper (7) is provided on the horizontal arm (4), and a second flexible scraper (8) is provided on the vertical arm (5). A scraper (9) is provided on the parallel arm (6). A crushing mechanism (10) is provided at the lower end of the stirring shaft (3).

2. The anti-caking stirring and scraping device for lime preparation tanks according to claim 1, characterized in that: The bottom of the tank (1) is designed as a conical structure inclined towards the center, and the scraper (9) is arranged at an angle of 45°-60° with the bottom of the tank (1).

3. The anti-caking stirring and scraping device for lime preparation tanks according to claim 1, characterized in that: The horizontal arm (4), vertical arm (5) and parallel arm (6) constitute a set of installation components. There are multiple sets of installation components, and all sets of stirring components are evenly distributed in a ring around the vertical center line of the stirring shaft (3).

4. The anti-caking stirring and scraping device for lime preparation tanks according to claim 1, characterized in that: At least one first flexible scraper (7) is installed on the horizontal arm (4). The first flexible scraper (7) is a flexible scraper with its working surface closely attached to the bottom of the can lid (2).

5. The anti-caking stirring and scraping device for lime preparation tanks according to claim 1, characterized in that: The second flexible scraper (8) uses a flexible scraper, whose working surface matches the inner curved surface of the tank wall of the tank body (1) and maintains a tight fit.

6. The anti-caking stirring and scraping device for lime preparation tanks according to claim 1, characterized in that: The tank (1) is provided with a slag discharge port at the bottom and a valve is installed at the slag discharge port. The crushing mechanism (10) is located at the slag discharge port and adopts a crushing blade structure.

7. The anti-caking stirring and scraping device for lime preparation tanks according to claim 2, characterized in that: Furthermore, the back of the scraper (9) is fitted with a counterweight for force balance.

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