A phosphoric acid concentration device

Abstract

This utility model relates to a phosphoric acid concentration device, including a concentration tank with a discharge port at the bottom, and further comprising: a support frame disposed inside the concentration tank and above the discharge port; a rotating shaft rotatably disposed between the top of the concentration tank and the support frame, with its top end extending from the top of the concentration tank; a rotation drive mechanism disposed at the top of the concentration tank for driving the rotating shaft to rotate; and multiple stirring blades. By organically integrating the stirring function and the wall scraping function into the same rotating system, the wall scraping mechanism can be completely retracted inside the stirring blades when not in use, avoiding the spatial conflict between the stirring and wall scraping components in traditional structures. This improves the utilization rate of the tank space, which is conducive to increasing the throughput and operating efficiency. The overall structure is compact and highly automated, which not only enhances the continuity and stability of the concentration operation but also reduces the equipment operation and maintenance costs, showing good prospects for industrial application.

Description

Technical Field

[0001] This utility model relates to the field of phosphoric acid concentration technology, specifically to a phosphoric acid concentration device. Background Technology

[0002] In daily energy extraction, phosphate rock is one of the most important mineral resources. When applied industrially, it is typically first refined from phosphate rock to obtain ordinary phosphoric acid, which is then concentrated and refined to produce industrial phosphoric acid. Most phosphoric acid concentration equipment currently has heating devices inside the tanks to concentrate dilute phosphoric acid through heating and evaporation. Because dilute phosphoric acid contains other substances, residue will adhere to the inner wall of the tank after concentration. Therefore, the tank needs to be thoroughly cleaned after processing phosphoric acid.

[0003] Currently, to monitor the internal conditions of concentration tanks, brushing structures are often installed inside. However, the presence of stirring devices within the tank to improve concentration efficiency significantly hinders the installation of these brushing structures. If both are installed simultaneously, interference will inevitably occur, limiting the effective volume of the tank and potentially affecting concentration efficiency. Therefore, a phosphoric acid concentration device is proposed to address these issues. Utility Model Content

[0004] This invention provides a phosphoric acid concentration device that solves the problem of interference between the two components, which not only limits the effective volume of the tank but may also affect the concentration efficiency, by combining a brush wall structure and a stirring device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A phosphoric acid concentration device, including a concentration tank, a discharge port at the bottom of the concentration tank, and further comprising:

[0006] The support frame is installed inside the concentration tank and located above the discharge port;

[0007] A rotating shaft is rotatably mounted between the top of the concentration tank and the support frame, with its top end protruding from the top of the concentration tank.

[0008] A rotary drive mechanism, located at the top of the concentration tank, is used to drive the rotary shaft to rotate.

[0009] There are multiple stirring blades, with the spiral set outside the rotating shaft. The top end of the blades is at the same height as the bottom end of the shaft. The stirring blades are connected to the inside of the rotating shaft. A wall scraping mechanism is retractably inserted into the stirring blades.

[0010] The telescopic adjustment structure is telescopically mounted in the rotating shaft and is used to simultaneously control the extension and retraction of all wall scraping mechanisms.

[0011] An adjustment drive mechanism, located at the top of the concentration tank, is used to drive the telescopic adjustment structure.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the support frame includes multiple uprights, with a support platform at the top of each upright, and a discharge chute formed between the uprights to facilitate material discharge.

[0014] Furthermore, the rotary drive mechanism includes a driven gear disposed on the through end of the rotary shaft, and a drive device disposed on the top of the concentration tank, wherein a transmission gear meshing with the driven gear is mounted on the output shaft of the drive device.

[0015] Furthermore, the scraping mechanism includes a scraper, and a telescopic seat that is movably inserted into the stirring blade is provided on the side of the scraper. Baffles are symmetrically arranged on the inner top wall and inner bottom wall of the stirring blade. A transmission seat that passes through the two baffles is provided at the inner end of the telescopic seat. A wedge-shaped adjusting block is provided at the inner end of the transmission seat. The width of the wedge-shaped adjusting block is greater than that of the transmission seat, and a return spring is provided between the wedge and the baffle.

[0016] Furthermore, each of the inner walls of the stirring blades is provided with a limiting groove, and the inner end of the telescopic seat is provided with a limiting block that slides in cooperation with the limiting groove.

[0017] Furthermore, the telescopic adjustment structure includes a telescopic adjustment rod inserted into the rotating shaft, and the outside of the adjustment rod is provided with a plurality of wedge-shaped abutment blocks that respectively cooperate with the wedge-shaped adjustment blocks of the wall scraping mechanism.

[0018] Furthermore, multiple sliding grooves are provided on the inner wall surface above the rotating shaft, and a sliding block that slides in cooperation with the sliding groove is provided on the outside of the adjusting rod.

[0019] Furthermore, the adjustment drive mechanism includes a mounting frame disposed on the top of the concentration tank, and a telescopic cylinder is disposed on the mounting frame. The telescopic end of the telescopic cylinder passes through the mounting frame and is rotatably connected to the adjustment rod.

[0020] Furthermore, a rotating connecting seat is installed on the telescopic end of the telescopic cylinder, the top end of the adjusting rod is inserted into the rotating connecting seat, and a T-shaped rotating structure is provided.

[0021] Furthermore, the mounting frame includes multiple columns disposed on the top of the concentration tank, and a top plate is provided on the top of the columns.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0023] 1. This phosphoric acid concentration device, by setting up a support frame and rotating shaft structure inside the concentration tank, and spirally installing multiple stirring blades on the outside of the rotating shaft, achieves uniform stirring and efficient heat transfer of dilute phosphoric acid, which helps to improve concentration efficiency. Simultaneously, a retractable wall scraping mechanism is inserted into the stirring blades, and its extension and retraction are uniformly controlled by a telescopic adjustment structure located inside the rotating shaft. This allows the wall scraping mechanism to automatically deploy after the concentration process is completed, effectively cleaning the inner wall of the tank. This avoids cleaning difficulties caused by long-term residue adhesion, improves the equipment's self-cleaning ability, reduces the frequency of manual maintenance, and extends the equipment's service life.

[0024] 2. This phosphoric acid concentration device organically integrates the stirring function and the wall scraping function into the same rotating system. When not in use, the wall scraping mechanism can be completely retracted inside the stirring blades, avoiding the spatial conflict between the stirring and wall scraping components in traditional structures. This improves the utilization rate of the tank space, which is conducive to increasing the throughput and operating efficiency. The overall structure is compact and highly automated, which not only enhances the continuity and stability of the concentration operation, but also reduces the equipment operation and maintenance costs, and has good prospects for industrial application. Attached Figure Description

[0025] Figure 1 A schematic diagram of a phosphoric acid concentration device provided in an embodiment of this utility model;

[0026] Figure 2 for Figure 1 A half-section diagram;

[0027] Figure 3 This is a half-sectional view of the rotating shaft of this utility model;

[0028] Figure 4 for Figure 3 Another perspective illustration;

[0029] Figure 5 for Figure 3 A frontal view diagram;

[0030] Figure 6 for Figure 5 Enlarged schematic diagram of structure A in the middle;

[0031] Figure 7 for Figure 5 Enlarged schematic diagram of the B-structure.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] Concentrating tank 1; discharge port 2; support frame 3; upright 301; support platform 302; rotating shaft 4; stirring blade 5; wall scraping mechanism 6; telescopic seat 601; scraper 602; limiting groove 603; limiting block 604; transmission seat 605; wedge-shaped adjusting block 606; baffle 607; return spring 608; adjusting rod 7; wedge-shaped contact block 701; T-shaped rotating structure 702; sliding groove 703; sliding block 704; adjusting drive mechanism 8; column 801; top plate 802; telescopic cylinder 803; rotating connecting seat 804; rotating drive mechanism 9; driven gear 901; drive device 902; transmission gear 903. Detailed Implementation

[0034] 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.

[0035] like Figure 1-7 As shown, a phosphoric acid concentration device in this embodiment includes a concentration tank 1, with a discharge port 2 at the bottom. In addition, the concentration tank 1 is provided with a corresponding feed port, exhaust port and surrounding steam heating structure, etc. This is prior art in the art, so it will not be described in detail here.

[0036] In this embodiment, the concentration device further includes: a support frame 3, a rotating shaft 4, a stirring blade 5, a wall scraping mechanism 6, a telescopic adjustment structure, an adjustment drive mechanism 8, and a rotation drive mechanism 9.

[0037] The support frame 3 is installed inside the concentration tank 1 and above the discharge port 2. Specifically, it includes multiple uprights 301, four in this embodiment. The top of the uprights 301 is provided with a support platform 302. A discharge chute is formed between the uprights 301 to facilitate discharge, so that the normal discharge of the concentration tank 1 can be achieved through the discharge chute without affecting the discharge of the material.

[0038] The rotating shaft 4 is rotatably mounted between the top of the concentration tank 1 and the support frame 3 via a bearing, and its top end protrudes from the top of the concentration tank 1. It should be noted that the rotating shaft 4 has a cavity inside, and the top of the cavity is open.

[0039] The rotary drive mechanism 9 is located on the top of the concentration tank 1 and is used to drive the rotary shaft 4 to rotate. Specifically, it includes a driven gear 901 located on the through end of the rotary shaft 4 and a drive device 902 located on the top of the concentration tank 1. The drive device 902 is composed of a drive motor and a reducer. A transmission gear 903 that meshes with the driven gear 901 is installed on the output shaft of the drive device 902. With this design, the rotary shaft 4 can be driven to rotate by the driving force of the drive device 902.

[0040] There are multiple stirring blades 5, which are spirally arranged outside the rotating shaft 4, with the top end at the bottom and the bottom end at the top at the same height. In this embodiment, there are three stirring blades 5. The stirring blades 5 are connected to the interior of the rotating shaft 4. A wall scraping mechanism 6 is retractably inserted into the stirring blade 5. A cavity is provided in the stirring blade 5, and both ends of the cavity are provided with openings. One opening is used to insert the wall scraping mechanism 6, and the other opening is used to connect to the rotating shaft 4.

[0041] The telescopic adjustment structure is telescopically mounted in the rotating shaft 4, and is used to simultaneously control the telescopic movement of all scraping mechanisms 6.

[0042] The adjustment drive mechanism 8 is located at the top of the concentration tank 1 and is used to drive the telescopic adjustment structure.

[0043] This design allows the scraping mechanism 6 to extend and retract within the corresponding stirring blades 5 during normal concentration, without affecting the normal operation of the stirring device. After discharge, the scraping mechanism 6 can be pushed out of the stirring blades 5 by adjusting the drive mechanism 8 and the telescopic adjustment structure, making it fit against the inner wall of the tank. This, in conjunction with the rotation of the rotating shaft 4, cleans the inner wall. Since the top of the lower stirring blade 5 is at the same height as the bottom of the upper stirring blade 5, a vertical linear cleaning is achieved, avoiding any missed areas and also avoiding any overlapping areas that could lead to over-cleaning and damage to the coating on the inner wall of the tank.

[0044] Furthermore, the scraping mechanism 6 includes a scraper 602, the length of which is the same as that of the stirring blade 5. A telescopic seat 601 is provided on the side of the scraper 602 and is movably inserted into the stirring blade 5. Baffles 607 are symmetrically arranged on the inner top and inner bottom walls of the stirring blade 5. The position of the baffles 607 does not affect the complete retraction of the telescopic seat 601. A transmission seat 605 is provided at the inner end of the telescopic seat 601, passing between the two baffles 607. A wedge-shaped adjusting block 606 is provided at the inner end of the transmission seat 605. The width of the wedge-shaped adjusting block 606 is greater than that of the transmission seat 605, and a return spring 608 is provided between the wedge-shaped adjusting block 606 and the baffle 607.

[0045] This design allows the scraper 602 to remain in a retracted state under the tension of the return spring 608. At the same time, when the wedge-shaped adjusting block 606 is resisted, it can push the return spring 608 out to achieve the effect of pushing the scraper 602 out.

[0046] The stirring blade 5 is provided with a limiting groove 603 on its inner wall surface, and the inner end of the telescopic seat 601 is provided with a limiting block 604 that slides with the limiting groove 603. The cooperation between the limiting groove 603 and the limiting block 604 can improve the stability of the telescopic seat 601 during telescopic movement.

[0047] In addition, the telescopic adjustment structure includes a telescopic adjustment rod 7 inserted into the rotating shaft 4, and a plurality of wedge-shaped abutment blocks 701 are provided on the outside of the adjustment rod 7, which respectively cooperate with the wedge-shaped adjustment blocks 606 of the wall scraping mechanism 6.

[0048] With this design, when the adjusting rod 7 extends or retracts vertically, the sliding cooperation between the wedge-shaped contact block 701 and the wedge-shaped adjusting block 606 can be used to control the extension and retraction of all scraping mechanisms 6.

[0049] In a preferred embodiment, a plurality of sliding grooves 703 are provided on the inner wall surface above the rotating shaft 4, and a sliding block 704 is provided on the outside of the adjusting rod 7 to slide in cooperation with the sliding grooves 703. In this embodiment, there are three sliding grooves 703 and three sliding blocks 704, which are used to improve the stability of the extension and retraction of the adjusting rod 7.

[0050] Furthermore, the adjustment drive mechanism 8 includes a mounting bracket set on the top of the concentration tank 1. A telescopic cylinder 803 is mounted on the mounting bracket. The telescopic end of the telescopic cylinder 803 passes through the mounting bracket and is rotatably connected to the adjustment rod 7. The adjustment rod 7 passes through the opening at the top of the rotating shaft 4 and is rotatably connected to the telescopic end of the telescopic cylinder 803, so as to achieve the effect of not affecting the normal rotation of the rotating shaft 4. At the same time, the telescopic adjustment of the adjustment rod 7 is achieved by the telescopic cylinder 803. In this embodiment, the telescopic cylinder 803 is an electric cylinder or a hydraulic cylinder.

[0051] The telescopic cylinder 803 has a rotating connecting seat 804 installed on its telescopic end. The top end of the adjusting rod 7 is inserted into the rotating connecting seat 804 and is provided with a T-shaped rotating structure 702. The rotating engagement and disengagement can be achieved through the T-shaped rotating structure 702.

[0052] In a preferred embodiment, the mounting frame includes a plurality of columns 801 disposed on the top of the concentration tank 1. In this embodiment, the number of columns 801 is three, and a top plate 802 is disposed on the top of the columns 801.

[0053] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A phosphoric acid concentration apparatus, comprising a concentration tank (1), wherein a discharge port (2) is provided at the bottom of the concentration tank (1), characterized in that, Also includes: The support frame (3) is set inside the concentration tank (1) and above the discharge port (2); A rotating shaft (4) is rotatably disposed between the top of the concentration tank (1) and the support frame (3), and its top end protrudes from the top of the concentration tank (1); A rotary drive mechanism (9) is set on top of the concentration tank (1) and is used to drive the rotary shaft (4) to rotate. There are multiple stirring blades (5), which are spirally arranged outside the rotating shaft (4), and the top end at the bottom is at the same height as the bottom end at the top. The stirring blades (5) are connected to the interior of the rotating shaft (4), and a wall scraping mechanism (6) is retractably inserted into the stirring blades (5). The telescopic adjustment structure is telescopically set in the rotating shaft (4) and is used to simultaneously control the telescopic movement of all scraping mechanisms (6); Adjustment drive mechanism (8) is set on top of concentration tank (1) and is used to drive the telescopic adjustment structure.

2. The phosphoric acid concentration apparatus according to claim 1, characterized in that: The support frame (3) includes multiple uprights (301), with a support platform (302) on the top of each upright (301), and a discharge chute formed between the uprights (301) to facilitate material discharge.

3. The phosphoric acid concentration apparatus according to claim 1, characterized in that: The rotary drive mechanism (9) includes a driven gear (901) disposed on the through end of the rotary shaft (4) and a drive device (902) disposed on the top of the concentration tank (1). A transmission gear (903) meshing with the driven gear (901) is mounted on the output shaft of the drive device (902).

4. A phosphoric acid concentration apparatus according to any one of claims 1-3, characterized in that: The scraping mechanism (6) includes a scraper (602), and a telescopic seat (601) is provided on the side of the scraper (602) and is movably inserted into the stirring blade (5). Baffles (607) are symmetrically arranged on the inner top wall and inner bottom wall of the stirring blade (5). A transmission seat (605) is provided at the inner end of the telescopic seat (601) and passes between the two baffles (607). A wedge-shaped adjusting block (606) is provided at the inner end of the transmission seat (605). The width of the wedge-shaped adjusting block (606) is greater than that of the transmission seat (605), and a return spring (608) is provided between it and the baffle (607).

5. A phosphoric acid concentration apparatus according to claim 4, characterized in that: Limiting grooves (603) are provided on the relative inner wall surfaces of the stirring blades (5), and a limiting block (604) is provided at the inner end of the telescopic seat (601) to slide in cooperation with the limiting grooves (603).

6. A phosphoric acid concentration apparatus according to claim 4, characterized in that: The telescopic adjustment structure includes a telescopic adjustment rod (7) inserted into the rotating shaft (4), and the outside of the adjustment rod (7) is provided with a plurality of wedge-shaped abutment blocks (701) that cooperate with the wedge-shaped adjustment blocks (606) of the wall scraping mechanism (6).

7. A phosphoric acid concentration apparatus according to claim 6, characterized in that: Multiple sliding grooves (703) are provided on the inner wall surface above the rotating shaft (4), and a sliding block (704) is provided on the outside of the adjusting rod (7) to slide in cooperation with the sliding grooves (703).

8. A phosphoric acid concentration apparatus according to claim 6, characterized in that: The adjustment drive mechanism (8) includes a mounting frame set on the top of the concentration tank (1), and a telescopic cylinder (803) is set on the mounting frame. The telescopic end of the telescopic cylinder (803) passes through the mounting frame and is rotatably connected to the adjustment rod (7).

9. A phosphoric acid concentration apparatus according to claim 8, characterized in that: The telescopic cylinder (803) has a rotating connecting seat (804) installed on its telescopic end. The top end of the adjusting rod (7) is inserted into the rotating connecting seat (804) and is provided with a T-shaped rotating structure (702).

10. A phosphoric acid concentration apparatus according to claim 8, characterized in that: The mounting frame includes multiple columns (801) set on the top of the concentration tank (1), and a top plate (802) is provided on the top of the columns (801).

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