A sulfide adding device for improving the solidification effect of a magnesium phosphate cement solidification fly ash process

Abstract

This utility model discloses a sulfide addition device for improving the curing effect of magnesium phosphate cement in the curing fly ash process. The device includes a support frame, a mixing hopper at the upper end of the support frame, and feeding hoppers on both the front and rear sides of the upper end of the mixing hopper. It also includes a uniform feeding mechanism, which comprises a top frame, a mounting frame, a spring, a dispersing cylinder, a feed inlet, and a drive assembly. The upper end of the mixing hopper has a rotatable top frame, and the mounting frame is slidably connected to the middle of the upper end of the mixing hopper via a sliding column. The upper end of the top frame and the lower end of the mounting frame are fitted together. This sulfide addition device for improving the curing effect of magnesium phosphate cement in the curing fly ash process, equipped with a uniform feeding mechanism, can add sulfide powder in multiple batches. During addition, centrifugal force can disperse the sulfide powder, preventing it from accumulating, thereby improving the mixing efficiency of fly ash and sulfides, and thus improving the curing efficiency of the fly ash.

Description

Technical Field

[0001] This utility model relates to the field of fly ash curing technology, specifically to a device for adding sulfides during the curing process of magnesium phosphate cement to improve the curing effect of fly ash. Background Technology

[0002] Fly ash solidification is a technology that treats fly ash (mainly composed of aluminosilicates) generated from coal-fired power plants by adding solidifying agents (such as cement and lime), auxiliary materials (sulfides), and an appropriate amount of water to form stable solid blocks. This process reduces the leaching risk of heavy metals and other pollutants in the fly ash through physicochemical reactions (such as pozzolanic reactions) while enhancing its mechanical properties, facilitating safe landfilling or resource utilization. During fly ash solidification, because sulfides react with cement, the fly ash and sulfides need to be premixed before being transported to subsequent mixing equipment where water and cement are added for further mixing. Sulfide addition equipment is required during premixing. Existing sulfide addition equipment in fly ash solidification processes typically consists of a feeding pipe and a mixing mechanism. The mixing mechanism comprises a mixing silo and a stirring frame, used for mixing fly ash and sulfides. The feeding pipe is located at the top of the mixing silo. The feeding pipe is connected to an external conveying device to transport sulfide powder. During use, fly ash and sulfide are fed into the mixing silo in equal proportions. The mixing rack rotates to mix the fly ash and sulfide evenly, achieving premixing of fly ash and sulfide. In this process, excessive sulfide can interfere with subsequent cement hydration or introduce sulfur-based contaminants. Therefore, the amount of sulfide added is usually 3% of the fly ash mass. This results in a large difference between the input amounts of sulfide and fly ash. In the traditional premixing process of fly ash curing, sulfide is added through the feeding pipe. The sulfide is thrown into the area below the feeding pipe, and the amount of sulfide added is small. Often, the mixing rack needs to rotate for a long time to mix the fly ash and sulfide evenly, which seriously affects the premixing efficiency of fly ash and sulfide, and thus affects the curing efficiency of fly ash. To address this, we propose a sulfide addition device in the process of curing fly ash with magnesium phosphate cement to improve the curing effect. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a sulfide addition device in the curing process of magnesium phosphate cement fly ash to improve the curing effect. It is equipped with a uniform feeding mechanism that can add sulfide powder in multiple batches. During the addition, the sulfide powder can also be scattered by centrifugal force, which can prevent the sulfide powder from accumulating together, thereby improving the mixing efficiency of fly ash and sulfide, and thus improving the curing efficiency of fly ash. It can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a sulfide addition device for improving the curing effect of magnesium phosphate cement during fly ash curing, comprising a support frame, a mixing hopper at the upper end of the support frame, feeding hoppers on both the front and rear sides of the upper end of the mixing hopper, and a uniform feeding mechanism;

[0005] Uniform feeding mechanism: It includes a top frame, a mounting frame, springs, a bulk material cylinder, a feed inlet, and a drive assembly. The upper part of the mixing silo is equipped with a rotatable top frame. The mounting frame is slidably connected to the middle of the upper part of the mixing silo via a sliding column. The upper end of the top frame and the lower end of the mounting frame are fitted together. Springs are provided between the upper end of the mounting frame and the top wall of the mixing silo. The springs are all sleeved on the outer surface of the sliding column. The bulk material cylinder is rotatably connected to the front and rear sides inside the mounting frame. The upper part of the outer surface of the bulk material cylinder penetrates the top wall of the mixing silo and is slidably connected to the lower end of the inner wall of the feeding silo. The feed inlet is opened at the upper part of the outer surface of the bulk material cylinder, providing a basis for multiple feedings of sulfide powder. The drive assembly is set at the upper part of the mixing silo and is equipped with a uniform feeding mechanism, which can feed sulfide powder in multiple times. During feeding, the sulfide powder can also be scattered by centrifugal force, avoiding the accumulation of sulfide powder, thereby improving the mixing efficiency of fly ash and sulfides, and thus improving the solidification efficiency of fly ash.

[0006] Furthermore, the drive assembly includes an external gear ring, gears, and connecting plates. The upper end of the mixing hopper is provided with a rotatable external gear ring. All gears are rotatably connected to the middle of the upper end of the feeding hopper and are meshed with the external gear ring. A connecting rod is rotatably connected to the middle of the mounting frame. The lower end of the connecting rod is fixedly connected to the upper end of the bulk material cylinder. Connecting plates are provided on the opposite inner surfaces of the gears and connecting rods. Rubber pads are provided on the opposite inner surfaces of two vertically adjacent connecting plates, which can make the bulk material cylinder rotate to apply a centrifugal force to the thrown sulfide powder.

[0007] Furthermore, the drive assembly also includes a limiting ring and an extrusion ball. The limiting ring is located in the middle of the inner wall of the feeding bin, and the extrusion ball is located on the front and rear sides of the middle of the outer surface of the connecting rod. The lower end of the limiting ring is provided with uniformly distributed grooves, and the upper end of the extrusion ball is installed in conjunction with the vertically adjacent grooves. The grooves can contact the extrusion ball to generate a vibration effect, thereby preventing the accumulation of sulfide powder inside the feeding bin.

[0008] Furthermore, it also includes a rotating shaft and stirring blades. The rotating shaft is rotatably connected to the inside of the mixing hopper. The inner wall of the top frame is fixedly connected to the upper end of the outer surface of the rotating shaft. The upper end of the outer surface of the rotating shaft passes through the inside of the mounting frame. The lower end of the outer toothed ring is fixedly connected to the upper end of the rotating shaft. The stirring blades are evenly arranged at the lower end of the outer surface of the rotating shaft to provide a basis for mixing sulfide powder and fly ash.

[0009] Furthermore, it also includes scrapers, which are respectively disposed on the front and rear sides of the outer surface of the rotating shaft. The outer edges of the scrapers are in contact with the inner wall of the mixing chamber, which can prevent the material from adhering to the inner wall of the mixing chamber during the mixing process.

[0010] Furthermore, it also includes a gearbox and a motor. The gearbox is located at the upper middle part of the mixing hopper, and the motor is located at the upper left middle part of the gearbox. The input end of the motor is electrically connected to the output end of the microcontroller. The lower end of the motor's output shaft is fixedly connected to the upper end of the gearbox's reduction shaft, and the upper end of the outer surface of the rotating shaft is fixedly connected to the inner wall of the gearbox's output shaft, providing a stable drive for the mixing of sulfide powder and fly ash.

[0011] Furthermore, it also includes a microcontroller, which is located at the lower right end of the bracket. The input terminal of the microcontroller is electrically connected to an external power supply to provide control over the mixing of sulfide powder and fly ash.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This equipment for adding sulfides during the curing process of magnesium phosphate cement fly ash, which improves the curing effect, has the following advantages:

[0013] 1. The material cylinder and feed inlet are moved up and down by the top frame extrusion mounting frame. When the feed inlet moves up, the sulfide powder can be dispersed into the mixing bin through the inside of the material cylinder. When the feed inlet moves down, the feeding stops, thus realizing the batch feeding of sulfide powder.

[0014] 2. The rotation of the shaft drives the gear to rotate through the transmission of the external gear ring. When the bulk material cylinder moves upward, the two connecting plates come together. The rubber pads between the two connecting plates are tightly pressed together, forming a huge frictional force, which temporarily combines the two connecting plates. This causes the bulk material cylinder to rotate during the feeding process, applying a centrifugal force to the falling sulfide powder, causing the sulfide powder to be thrown outward around the bulk material cylinder as the center. This achieves uniform feeding of sulfide powder, avoids the sulfide powder from accumulating in one place, improves the mixing efficiency of fly ash and sulfides, and thus improves the solidification efficiency of fly ash. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the uniform feeding mechanism of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the drive component of this utility model;

[0019] Figure 5This is a schematic diagram of the structure of the stirring blade and scraper of this utility model.

[0020] In the diagram: 1. Support frame, 2. Mixing bin, 3. Feeding bin, 4. Uniform feeding mechanism, 41. Top frame, 42. Mounting frame, 43. Spring, 44. Dispersing cylinder, 45. Feed inlet, 46. Drive assembly, 461. External gear ring, 462. Gear, 463. Connecting piece, 464. Limiting ring, 465. Extrusion ball, 5. Rotary shaft, 6. Mixing blade, 7. Scraper, 8. Gearbox, 9. Motor, 10. Microcontroller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This embodiment provides a technical solution: a sulfide addition device for improving the curing effect of magnesium phosphate cement in the curing fly ash process, including a support 1, a mixing hopper 2 at the upper end of the support 1, the upper end of the mixing hopper 2 being cylindrical and the lower end being funnel-shaped, a feed pipe at the middle right side of the upper end of the mixing hopper 2, and a flange at the lower end of the discharge port at the middle lower end of the mixing hopper 2 for connection between devices, the support 1 provides stable support for the mixing hopper 2, and feeding hoppers 3 are provided on both the front and rear sides of the upper end of the mixing hopper 2, each feeding hopper 3 having a feeding pipe at its upper end, and also includes a single-chip microcomputer 10, which is located at the lower right end of the support 1, and the input end of the single-chip microcomputer 10 is electrically connected to an external power source to provide control for the mixing of sulfide powder and fly ash, and also includes a uniform feeding mechanism 4;

[0023] Uniform feeding mechanism 4: It includes a top frame 41, a mounting frame 42, springs 43, a material dispensing cylinder 44, a feed inlet 45, and a drive assembly 46. The upper part of the mixing hopper 2 is equipped with a rotatable top frame 41. The left and right sides of the top frame 41 are arc-shaped. The mounting frame 42 is slidably connected to the middle of the upper part of the mixing hopper 2 via a sliding column. The upper end of the top frame 41 is fitted with the lower end of the mounting frame 42. Both the upper end of the top frame 41 and the lower end of the mounting frame 42 are arc-shaped. The upper end of the top frame 41 is flush with the middle of the mounting frame 42. When the top frame 41 contacts and presses against the mounting frame 42, the mounting frame 42 moves upward. Springs 43 are provided between the upper end of the mounting frame 42 and the top wall of the mixing hopper 2. The springs 43 are all sleeved on the outer surface of the sliding column. The material dispensing cylinders 44 are rotatably connected to the mounting frame. The upper part of the outer surface of the bulk material cylinder 44, located on both the front and rear sides inside the 42, slides through the top wall of the mixing bin 2 and is connected to the lower part of the inner wall of the feeding bin 3. The feed inlets 45 are all located on the upper part of the outer surface of the bulk material cylinder 44. The bulk material cylinder 44 has through holes that communicate with the feed inlets 45. A dispensing head is located at the lower end of the bulk material cylinder 44, consisting of a cross-shaped dispensing plate and a base plate. After the sulfide powder falls, it is divided into four parts by the dispensing plate. When the bulk material cylinder 44 is stationary, the feed inlets 45 are located at the lower part of the inner wall of the feeding bin 3. When the bulk material cylinder 44 moves upward, the feed inlets 45 are exposed inside the feeding bin 3, providing a basis for multiple additions of sulfide powder. The drive assembly 46 is located at the upper end of the mixing bin 2 and includes an external gear ring 461 and gears 46. 2. A rotatable external gear ring 461 is provided at the upper end of the mixing bin 2. Gears 462 are rotatably connected to the middle of the upper end of the feeding bin 3. Gears 462 are meshed with the external gear ring 461. A connecting rod is rotatably connected to the middle of the mounting frame 42. The lower end of the connecting rod is fixedly connected to the upper end of the bulk material cylinder 44. A connecting piece 463 is provided on the inner side of the gears 462 and the connecting rod. A rubber pad is provided on the inner side of the two vertically adjacent connecting pieces 463. This allows the bulk material cylinder 44 to rotate and apply a centrifugal force to the thrown sulfide powder. The drive assembly 46 also includes a limiting ring 464 and an extrusion ball 465. The limiting ring 464 is located in the middle of the inner wall of the feeding bin 3. The extrusion ball 465 is located in the middle of the outer surface of the connecting rod. On the rear two sides, the extrusion balls 465 are respectively set on the front and rear sides of the middle of the outer surface of the connecting rod via extension rods. The extrusion balls 465 and the extension rods are both made of PVC plastic, which has good plastic deformation and resilience. The lower end of the limiting ring 464 has evenly distributed grooves. The upper ends of the extrusion balls 465 are all installed in conjunction with the vertically adjacent grooves. The upper ends of the extrusion balls 465 are all in contact with the vertically adjacent grooves, which can generate a vibration effect through the contact between the grooves and the extrusion balls 465, avoiding the accumulation of sulfide powder inside the feeding bin 3. It also includes a rotating shaft 5 and a stirring blade 6. The rotating shaft 5 is rotatably connected to the middle of the interior of the mixing bin 2. The inner wall of the top frame 41 is fixedly connected to the upper end of the outer surface of the rotating shaft 5. The upper end of the outer surface of the rotating shaft 5 passes through the middle of the interior of the mounting frame 42.The lower end of the external gear ring 461 is fixedly connected to the upper end of the rotating shaft 5. The stirring blades 6 are evenly arranged on the lower end of the outer surface of the rotating shaft 5. Three horizontally adjacent stirring blades 6 form a group, and the bending direction and deflection angle of two vertically adjacent groups of stirring blades 6 are different to improve the mixing efficiency of the material. This provides a basis for the mixing of sulfide powder and fly ash. The system also includes scrapers 7, which are respectively arranged on the front and rear sides of the outer surface of the rotating shaft 5. The outer edges of the scrapers 7 are in contact with the inner wall of the mixing bin 2, which can prevent the material from adhering to the inner wall of the mixing bin 2 during the mixing process. The system also includes a reduction gearbox 8 and a motor 9. The reduction gearbox 8 is located in the mixing bin 2. At the upper center, motor 9 is located on the upper left side of gearbox 8. The input end of motor 9 is electrically connected to the output end of microcontroller 10. The lower end of the output shaft of motor 9 is fixedly connected to the upper end of the reduction shaft of gearbox 8. The upper end of the outer surface of rotating shaft 5 is fixedly connected to the inner wall of the output shaft of gearbox 8, providing a stable drive for mixing sulfide powder and fly ash. A uniform feeding mechanism 4 is provided, which can feed sulfide powder in multiple batches. During feeding, centrifugal force can also be used to scatter the sulfide powder, preventing it from accumulating together, thereby improving the mixing efficiency of fly ash and sulfides, and thus improving the solidification efficiency of fly ash.

[0024] The working principle of the sulfide addition device in the curing fly ash process of magnesium phosphate cement provided by this utility model to improve the curing effect is as follows: During the pre-mixing of fly ash and sulfide powder, the external conveying device operates, sending fly ash into the mixing silo 2 through the feed pipe and sulfide powder into the feeding silo 3 through the feeding pipe. The single-chip microcomputer 10 controls the motor 9 to operate, and the motor 9 drives the rotating shaft 5 to rotate through the reduction gearbox 8. As the rotating shaft 5 rotates, the stirring blades 6 and scraper 7 also rotate simultaneously, continuously turning over the surrounding fly ash and scraping off the fly ash adhering to the inner wall of the mixing silo 2. As the rotating shaft 5 continues to rotate, the top frame 41 also rotates. When the top frame 41 contacts the mounting frame 42, the top frame 41 squeezes the mounting frame 42, causing the mounting frame 42 to move upward and disperse the material. The cylinder 44 also moves upwards synchronously, and the spring 43 contracts under force. As the bulk material cylinder 44 moves upwards, the feed inlet 45 is exposed inside the feeding bin 3. The sulfide powder inside the feeding bin 3 enters the bulk material cylinder 44 through the feed inlet 45, and then falls into the mixing bin 2 from the distribution head at the lower end of the bulk material cylinder 44. With the help of the stirring blades 6 and scraper 7, the fly ash and sulfide powder are initially mixed evenly. At the same time, as the rotating shaft 5 rotates, the external gear ring 461 also rotates. Because the gears 462 are all meshed with the external gear ring 461, the gears 462 also rotate, driving the upper connecting piece 463 to rotate. When the top frame 41 squeezes the mounting frame 42 to move the bulk material cylinder 44 upwards, the lower connecting piece 463 also moves upwards. At this time, the two vertically adjacent connecting pieces... The rubber pads on the connecting plates 463 are pressed tightly together, creating a huge frictional force that temporarily combines the two connecting plates 463. As the gear 462 rotates, the upper connecting plate 463 drives the lower connecting plate 463 to rotate simultaneously. Through the transmission of the connecting rod, the dispensing cylinder 44 also rotates. At this time, sulfide powder is being dispersed from the dispensing head into the interior of the mixing bin 2. The rotating dispensing cylinder 44 creates a centrifugal force on the sulfide powder at the dispensing head, causing the sulfide powder to be thrown outwards around the dispensing cylinder 44 as the center, achieving uniform feeding of sulfide powder. At the same time, as the connecting rod rotates, the extrusion ball 465 also rotates. As the extrusion ball 465 rotates, the surface of the extrusion ball 465 contacts the groove below the limiting ring 464, generating vibration. The vibration of the feeding hopper 3 acts on the sulfide powder, preventing it from accumulating inside. When the top frame 41 separates from the mounting frame 42, the mounting frame 42 returns to its original position under its own weight and the elastic deformation of the spring 43. Simultaneously, the material dispensing cylinder 44 also returns to its original position, and the feed inlet 45 moves downward to meet the lower end of the inner wall of the feeding hopper 3. The sulfide powder is blocked and will no longer be fed. The two vertically adjacent connecting plates 463 also separate simultaneously. This process repeats, achieving batch feeding of the sulfide powder. This batch feeding, combined with the scattering effect under centrifugal force, makes the sulfide powder more evenly distributed when thrown into the fly ash, preventing it from accumulating and improving the mixing efficiency of fly ash and sulfides.This, in turn, improves the solidification efficiency of fly ash.

[0025] It is worth noting that the microcontroller 10 disclosed in the above embodiments is an STM32F429VIT6 microcontroller, and the motor 9 is a YE3-180M-2 motor. The microcontroller 10 controls the operation of the motor 9 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sulfide adding device for improving the solidification effect of a magnesium phosphate cement solidification fly ash process, comprising a support (1), a mixing bin (2) is arranged at the upper end of the inside of the support (1), and a feeding bin (3) is arranged on the front and back of the upper end of the mixing bin (2), characterized in that: It also includes a uniform feeding mechanism (4); Uniform feeding mechanism (4): It includes a top frame (41), a mounting frame (42), a spring (43), a material dispensing cylinder (44), a feed inlet (45), and a drive assembly (46). The upper part of the mixing silo (2) is provided with a rotatable top frame (41). The mounting frame (42) is slidably connected to the middle of the upper part of the mixing silo (2) through a sliding column. The upper end of the top frame (41) is fitted with the lower end of the mounting frame (42). The upper end of the mounting frame (42) is connected to the mixing silo. Springs (43) are provided between the top walls of (2), and springs (43) are sleeved on the outer surface of the sliding column. The bulk material cylinder (44) is rotatably connected to the front and rear sides inside the mounting frame (42). The upper part of the outer surface of the bulk material cylinder (44) passes through the top wall of the mixing bin (2) and is slidably connected to the lower part of the inner wall of the feeding bin (3). The feed inlet (45) is opened on the upper part of the outer surface of the bulk material cylinder (44). The drive assembly (46) is set at the upper end of the mixing bin (2).

2. The process for improving the solidification effect of magnesium phosphate cement solidified fly ash in the process of adding sulfide equipment, according to claim 1, characterized in that: It also includes a microcontroller (10), which is located at the lower right side of the bracket (1), and the input terminal of the microcontroller (10) is electrically connected to an external power supply.

3. The sulfide addition device for improving the curing effect of magnesium phosphate cement fly ash during curing, as described in claim 2, is characterized in that: The drive assembly (46) includes an external gear ring (461), gears (462) and connecting pieces (463). The upper end of the mixing bin (2) is provided with a rotatable external gear ring (461). All gears (462) are rotatably connected to the middle of the upper end of the feeding bin (3). All gears (462) are meshed with the external gear ring (461). The middle of the mounting frame (42) is rotatably connected with a connecting rod. The lower end of the connecting rod is fixedly connected to the upper end of the bulk material cylinder (44). Connecting pieces (463) are provided on the opposite inner surfaces of the gears (462) and the connecting rod. Rubber pads are provided on the opposite inner surfaces of two vertically adjacent connecting pieces (463).

4. The process for improving the solidification effect of magnesium phosphate cement solidification fly ash in the process of sulfide adding equipment according to claim 3, characterized in that: The drive assembly (46) further includes a limiting ring (464) and an extrusion ball (465). The limiting ring (464) is located in the middle of the inner wall of the feeding bin (3). The extrusion ball (465) is located on the front and rear sides of the middle of the outer surface of the connecting rod. The lower end of the limiting ring (464) is provided with a uniformly distributed groove. The upper end of the extrusion ball (465) is installed in conjunction with the vertically adjacent groove.

5. The process for improving the solidification effect of magnesium phosphate cement solidification fly ash in the process of adding sulfide equipment according to claim 3, characterized in that: It also includes a rotating shaft (5) and stirring blades (6). The rotating shaft (5) is rotatably connected to the middle of the mixing bin (2). The inner wall of the top frame (41) is fixedly connected to the upper end of the outer surface of the rotating shaft (5). The upper end of the outer surface of the rotating shaft (5) passes through the middle of the mounting frame (42). The lower end of the outer toothed ring (461) is fixedly connected to the upper end of the rotating shaft (5). The stirring blades (6) are evenly arranged on the lower end of the outer surface of the rotating shaft (5).

6. The process for improving the solidification effect of magnesium phosphate cement solidification fly ash in the process of adding sulfide equipment according to claim 5, characterized in that: It also includes scrapers (7), which are respectively disposed on the front and rear sides of the outer surface of the rotating shaft (5), and the outer edges of the scrapers (7) are in contact with the inner wall of the mixing bin (2).

7. The process for improving the solidification effect of magnesium phosphate cement solidification fly ash in the process of sulfide adding equipment according to claim 5, characterized in that: It also includes a gearbox (8) and a motor (9). The gearbox (8) is located at the upper middle part of the mixing bin (2), and the motor (9) is located at the upper left middle part of the gearbox (8). The input end of the motor (9) is electrically connected to the output end of the microcontroller (10). The lower end of the output shaft of the motor (9) is fixedly connected to the upper end of the gearbox (8) reduction shaft, and the upper end of the outer surface of the rotating shaft (5) is fixedly connected to the inner wall of the output shaft of the gearbox (8).

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