Phosphogypsum calcination treatment equipment

Abstract

The utility model belongs to the technical field of ardealite calcination, and particularly relates to ardealite calcination treatment equipment which comprises a calcination furnace body, a support is arranged on the lower side of the calcination furnace body, a feeding port is formed in one side of the upper side face of the calcination furnace body, and a sealing cover is arranged on the upper side of the feeding port. Raw materials fall to the position below the porous disc from the leakage holes in sequence, high-temperature air entering the bottom of the inner side of the calcining furnace body from the air inlet pipe can rapidly make contact with raw material powder falling from the leakage holes, the raw material powder makes full contact with the high-temperature air, and rapid calcining treatment is conducted on the raw material powder; the raw material powder is conveyed to the upper portion of the porous disc through rotation of the spiral feeding plate through the connecting opening and falls to the uppermost portion of the ardealite powder, so that the raw material powder is circularly calcined for multiple times, the vertical circulation effect of the raw material is better, the contact effect of the raw material and high-temperature gas is better and more sufficient, and the calcination treatment effect is more comprehensive and better.

Description

Technical Field

[0001] This utility model belongs to the field of phosphogypsum calcination technology, specifically relating to a phosphogypsum calcination treatment device. Background Technology

[0002] The main purpose of calcining phosphogypsum is to remove its moisture ions and improve its physical and chemical properties, making it more suitable for subsequent processing and utilization. Phosphogypsum is a solid waste generated in the wet-process phosphoric acid production process. Its main component is calcium sulfate dihydrate, and it also contains impurities such as incompletely decomposed phosphate rock, residual phosphoric acid, fluorides, acid-insoluble substances, and organic matter. Calcination is the process of heating powdered, block, or granular raw materials to a certain temperature to cause chemical or physical changes, thereby improving their properties. For phosphogypsum, calcination can remove its moisture ions, making it a more reactive compound that is easier to process and utilize.

[0003] The existing patent authorization number: CN 219239541 U proposes a new type of phosphogypsum calcination equipment, in which the air inlet pipe and the air outlet pipe are both located above the calcination box. When high-temperature gas is sent into the calcination box, it is difficult for the gas to directly contact the inner lower layer of the phosphogypsum raw material, resulting in poor calcination treatment effect. In addition, its spiral blades can only directly act on the central area of ​​the calcination box, and the phosphogypsum raw material in the edge area of ​​the calcination box is difficult to be internally affected. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a phosphogypsum calcination treatment device, which solves the problem of the novel phosphogypsum calcination device proposed in the existing patent authorization number: CN 219239541 U. In this device, the air inlet and outlet pipes are both located above the calcination box. When high-temperature gas is introduced into the calcination box, it is difficult for the gas to directly contact the lower inner layer of the phosphogypsum raw material, resulting in poor calcination treatment effect. In addition, its spiral blades can only directly act on the central area of ​​the calcination box, and the phosphogypsum raw material in the edge area of ​​the calcination box is difficult to be affected.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a calcination treatment device for phosphogypsum, comprising a calcination furnace body, a support frame provided on the lower side of the calcination furnace body, a feed inlet on one side of the upper side of the calcination furnace body, a sealing cover provided on the upper side of the feed inlet, a perforated disc fixedly installed on the lower inner side of the calcination furnace body, the perforated disc having evenly spaced perforations on its upper side, a motor installed in the middle of the upper side of the calcination furnace body, a return cylinder fixedly installed at the center of the bottom inner side of the calcination furnace body, the return cylinder penetrating the center of the perforated disc to the upper side, and the output end of the motor... A shaft is fixedly installed through the calcining furnace body to the inner side. The shaft is inserted into the bottom inner side of the return cylinder. A spiral feeding plate is fixedly installed on the inner part of the shaft and the return cylinder. Connection ports are equidistantly arranged around the bottom side of the return cylinder. Connecting rods are symmetrically arranged at the upper end of the shaft. Vertical rods are fixedly installed on the lower sides of both ends of the connecting rods. A deflector plate is installed at the lower end of each vertical rod. The deflector plate is set to fit against the upper side of the perforated plate. An air inlet pipe and an air outlet pipe are respectively connected to the lower side of the calcining furnace body. A filter screen is installed at the connection port between the air outlet pipe and the calcining furnace body.

[0006] The beneficial effects of this invention are as follows: the raw materials fall from the holes to the bottom of the perforated plate. The high-temperature air entering the bottom of the calcining furnace body through the air inlet pipe will quickly contact the raw material powder falling from the holes, ensuring full contact and rapid calcination of the raw material powder. At the same time, the shaft drives the spiral feeding plate to rotate. After the raw material powder falls to the bottom of the calcining furnace body, it will be transported to the top of the perforated plate through the connection port by the spiral feeding plate, falling to the top of the phosphogypsum powder. This allows for multiple cycles of calcination of the raw material powder, resulting in better circulation of the raw material and more thorough contact between the raw material and the high-temperature gas, thus achieving a more comprehensive and better calcination effect.

[0007] To allow the raw material powder to act for a longer time and achieve better results;

[0008] As a further improvement to the above technical solution: both the inlet pipe and the outlet pipe are introduced from the tangential direction of the outer side of the calcining furnace body, the inlet pipe and the outlet pipe are arranged opposite each other on the same side of the calcining furnace body, and the outlet pipe is arranged on the upper side of the inlet pipe.

[0009] The beneficial effects of this improvement are as follows: both the inlet and outlet pipes are tangentially introduced from the outer side of the calcining furnace body. The high-temperature air blown into the bottom of the calcining furnace body through the inlet pipe can drive the raw material powder to move in a spiral motion and gradually settle towards the bottom of the calcining furnace body. The high-temperature air will act on the raw material powder inside the calcining furnace body for a longer time and with better effect. In addition, the high-temperature air spirals along the inner wall of the calcining furnace body, which can blow away the raw material powder filtered by the filter screen, preventing the raw material powder from clogging the filter screen. The remaining tiny powders will be discharged from the filter screen through the outlet pipe with the high-temperature gas and finally be filtered and collected by the bag dust collector.

[0010] In order to observe the calcination state of phosphogypsum raw materials;

[0011] As a further improvement to the above technical solution: observation windows are respectively opened on the upper and lower sides of the side of the calcining furnace body corresponding to the upper and lower sides of the perforated plate.

[0012] The beneficial effect of this improvement is that an observation window is provided to observe the calcination state of the phosphogypsum raw material.

[0013] To facilitate the collection of raw materials at the connection point;

[0014] As a further improvement to the above technical solution: the bottom surface of the calcining furnace body is an inclined surface that converges downwards towards the return material cylinder.

[0015] The beneficial effect of this improvement is that it facilitates the collection of raw materials at the connection point.

[0016] To prevent raw materials from adhering to the inner side wall of the calcining furnace;

[0017] As a further improvement to the above technical solution: all the uprights are set to fit against the inner side wall of the calcining furnace body.

[0018] The beneficial effect of this improvement is that when the upright rotates, it can scrape the inner wall of the calcining furnace body, preventing the raw materials from adhering to the inner wall of the calcining furnace body.

[0019] To facilitate the passage of raw materials through the perforated disc;

[0020] As a further improvement to the above technical solution: the dial is an inclined plate that tilts downward to one side, and the lower edge of the dial is in contact with the upper side of the perforated disk.

[0021] The beneficial effects of this improvement are as follows: the downward tilt of the dial plate only needs to be opposite to the final rotation direction. When the dial plate moves along the upper side of the perforated disk, it can squeeze the raw material powder along the slope downward, promote the raw material to pass through the perforated disk, and can also produce a moving squeezing effect on some incompletely crushed raw material blocks, so that the raw material blocks continue to be crushed.

[0022] In order to quickly discharge the raw materials from the calcining furnace;

[0023] As a further improvement to the above technical solution: the lower end of the return cylinder passes through the calcining furnace body and is threadedly connected to the bottom cover on the lower side.

[0024] The beneficial effects of this improvement are: by opening the bottom cover, simply reverse the rotation of the motor output end, and the shaft will drive the spiral feeding plate to rotate in the opposite direction, which can quickly discharge the raw materials inside the calcining furnace.

[0025] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0029] Figure 4 This is a schematic diagram of the structure of the lever plate in this utility model;

[0030] In the diagram: 1. Calcination furnace body; 2. Support frame; 3. Feed inlet; 4. Sealing cover; 5. Perforated disc; 6. Return cylinder; 7. Motor; 8. Shaft; 9. Spiral feed plate; 10. Connection port; 11. Air inlet pipe; 12. Air outlet pipe; 13. Observation window; 14. Filter screen; 15. Connecting rod; 16. Vertical pole; 17. Pulley; 18. Bottom cover. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0032] like Figure 1 — Figure 4The diagram shows a calcination treatment device for phosphogypsum, comprising a calcination furnace body 1, a support 2 on the lower side of the calcination furnace body 1, a feed inlet 3 on one side of the upper side of the calcination furnace body 1, a sealing cover 4 on the upper side of the feed inlet 3, a perforated disc 5 fixedly installed on the lower inner side of the calcination furnace body 1, the perforated disc 5 having evenly spaced perforations on its upper side, a motor 7 installed in the middle of the upper side of the calcination furnace body 1, a return cylinder 6 fixedly installed at the center of the bottom inner side of the calcination furnace body 1, the return cylinder 6 penetrating through the center of the perforated disc 5 to the upper side, a shaft 8 fixedly installed at the output end of the motor 7 penetrating through the calcination furnace body 1 to the inner side, the shaft 8 being inserted into the bottom inner side of the return cylinder 6, and a spiral feeding plate fixedly installed on the inner part of the shaft 8 within the return cylinder 6. 9. The bottom side of the return cylinder 6 is provided with equidistant connecting ports 10. The upper end of the shaft 8 is symmetrically provided with connecting rods 15. The lower sides of both ends of the connecting rods 15 are fixed with uprights 16. The lower ends of the uprights 16 are provided with deflectors 17. The deflectors 17 are set against the upper side of the perforated plate 5. The lower side of the calcining furnace body 1 is respectively connected with an air inlet pipe 11 and an air outlet pipe 12. A filter screen 14 is provided at the connection between the air outlet pipe 12 and the calcining furnace body 1. The raw materials fall from the holes to the bottom of the perforated plate 5. The high-temperature air entering the bottom of the calcining furnace body 1 from the air inlet pipe 11 will quickly contact the raw material powder falling from the holes, so that it is fully contacted and the raw material powder is quickly calcined. At the same time, the shaft 8 drives the spiral feeding plate. 9. After the raw material powder falls to the bottom of the inner side of the calcining furnace body 1, it will be conveyed by the spiral feeding plate 9 through the connection port 10 to the top of the perforated plate 5, falling on the top of the phosphogypsum powder. This allows for multiple cycles of calcination of the raw material powder, resulting in better circulation and more thorough contact between the raw material and the high-temperature gas, thus achieving a more comprehensive and better calcination effect. The air inlet pipe 11 and the air outlet pipe 12 both enter tangentially from the outer side of the calcining furnace body 1. The air inlet pipe 11 and the air outlet pipe 12 are positioned opposite each other on the same side of the calcining furnace body 1, with the air outlet pipe 12 positioned above the air inlet pipe 11. The high-temperature air is blown into the bottom of the inner side of the calcining furnace body 1 through the air inlet pipe 11. The high-temperature air can drive the raw material powder in a spiral motion and gradually settle towards the bottom of the calcination furnace body 1. The high-temperature air has a longer and better effect on the raw material powder inside the calcination furnace body 1. Furthermore, the high-temperature air spirals along the inner wall of the calcination furnace body 1, blowing away the raw material powder filtered by the filter screen 14 and preventing the raw material powder from clogging the filter screen 14. The remaining fine powder will be discharged from the filter screen 14 through the air outlet pipe 12 along with the high-temperature gas, and finally filtered and collected by the bag filter dust collector. The upper and lower sides of the calcination furnace body 1 are respectively provided with observation windows 13 corresponding to the upper and lower sides of the perforated plate 5. The observation windows 13 are used to observe the calcination state of the phosphogypsum raw material. The bottom surface of the calcination furnace body 1 is a downward slope that converges towards the return cylinder 6, which facilitates the collection of raw materials at the connection port 10.The uprights 16 are all fitted against the inner wall of the calcining furnace body 1. When the uprights 16 rotate, they can scrape against the inner wall of the calcining furnace body 1, preventing raw materials from adhering to the inner wall. The deflector 17 is an inclined plate tilted downwards to one side. The lower edge of the deflector 17 is in contact with the upper side of the perforated disk 5. The downward tilt of the deflector 17 only needs to be opposite to the final rotation direction. When the deflector 17 moves along the upper side of the perforated disk 5, it can squeeze the raw material powder along the inclined surface downwards, promoting the passage of raw materials through the perforated disk 5. It can also produce a moving and squeezing effect on some incompletely crushed raw material blocks, causing the raw material blocks to continue to break down. The lower end of the return cylinder 6 passes through the calcining furnace body 1 and is threadedly connected to the bottom cover 18 on the lower side. Opening the bottom cover 18 only requires reversing the output end of the motor 7, causing the shaft 8 to drive the spiral feeding plate 9 to rotate in the opposite direction, which can quickly discharge the raw materials in the calcining furnace body 1.

[0033] Working principle and usage process of this utility model:

[0034] In use, phosphogypsum is crushed into powder and then fed into the calcining furnace 1 through the feed inlet 3. The phosphogypsum raw material falls above the perforated disc 5 and is connected to a high-temperature hot air pipeline through the air inlet pipe 11. It is connected to a bag filter dust collector through the air outlet pipe 12. The motor 7 is started, and the output end of the motor 7 drives the shaft 8 to rotate. The shaft 8 drives the deflector plate 17 to rotate through the connecting rod 15 and the upright rod 16. The deflector plate 17 will deflect the raw material on the upper side of the perforated disc 5. The raw material falls from the holes to the bottom of the perforated disc 5. The high-temperature air entering the bottom of the calcining furnace 1 through the air inlet pipe 11 will quickly contact the raw material powder falling from the holes, ensuring full contact and rapid calcination of the raw material powder. At the same time, the shaft 8 drives the screw feeder. As plate 9 rotates, the raw material powder falls to the bottom of the inner side of the calcining furnace body 1. It is then conveyed through the connection port 10 by the rotating spiral feeding plate 9 to the top of the perforated disk 5, where it falls onto the top of the phosphogypsum powder. This allows for multiple cycles of calcination of the raw material powder, resulting in better circulation and more thorough contact between the raw material and the high-temperature gas, leading to a more comprehensive and effective calcination process. Furthermore, both the inlet pipe 11 and the outlet pipe 12 are tangentially inserted from the outer side of the calcining furnace body 1. High-temperature air blown into the bottom of the inner side of the calcining furnace body 1 through the inlet pipe 11 drives the raw material powder in a spiral motion, gradually causing it to settle towards the bottom of the calcining furnace body 1. This allows the high-temperature air to act on the raw material powder inside the calcining furnace body 1 for a longer period. This design achieves better results, and the spiral rotation of the high-temperature air against the inner wall of the calcining furnace body 1 blows away the raw material powder filtered by the filter screen 14, preventing the powder from clogging the screen. The remaining fine powder is discharged from the filter screen 14 through the exhaust pipe 12 with the high-temperature gas and finally collected by the bag filter dust collector. Furthermore, an observation window 13 is provided to observe the calcination state of the phosphogypsum raw material. Additionally, the bottom surface of the calcining furnace body 1 is a downward-sloping surface that converges towards the return cylinder 6, facilitating the collection of raw materials at the connection port 10. Moreover, the uprights 16 are all fitted against the inner wall of the calcining furnace body 1; when the uprights 16 rotate, they can scrape against the inner wall of the calcining furnace body 1, preventing the raw material from adhering to the inner wall. In addition, the deflector plate 17 is an inclined plate that tilts downward to one side. The lower edge of the deflector plate 17 is in contact with the upper side of the perforated disk 5. The downward tilt of the deflector plate 17 only needs to be opposite to the final rotation direction. When the deflector plate 17 moves along the upper side of the perforated disk 5, it can squeeze the raw material powder along the way downward along the inclined surface, promote the raw material to pass through the perforated disk 5, and can also produce a moving squeezing effect on some incompletely crushed raw material blocks, so that the raw material blocks continue to be crushed. In addition, the lower end of the return cylinder 6 passes through the calcining furnace body 1 and is threadedly connected to the bottom cover 18 on the lower side. When the bottom cover 18 is opened, the output end of the motor 7 only needs to be rotated in the opposite direction, and the shaft 8 drives the spiral feeding plate 9 to rotate in the opposite direction, so that the raw material in the calcining furnace body 1 can be quickly discharged.

[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. An apparatus for calcining treatment of phosphogypsum, characterized by: The utility model provides a calcining furnace body (1), the lower side of calcining furnace body (1) is provided with support (2), the upper side of calcining furnace body (1) side is provided with feed inlet (3), the upper side of feed inlet (3) is provided with sealing cover (4), the inboard of calcining furnace body (1) is fixedly provided with porous disc (5) close to the lower side, the upper side of porous disc (5) is uniformly provided with leak hole, the upper side of calcining furnace body (1) is provided with motor (7), the inboard bottom center of calcining furnace body (1) is fixedly provided with return cylinder (6), return cylinder (6) penetrates the center of porous disc (5) to the upper side, the output of motor (7) penetrates calcining furnace body (1) to the inboard fixedly provided with shaft (8), shaft (8) is inserted into the inboard bottom side of return cylinder (6), the inboard part of shaft (8) in return cylinder (6) is fixedly provided with spiral feeding plate (9), the lateral bottom of return cylinder (6) is equally provided with connecting port (10), the upper end of shaft (8) is provided with connecting rod (15) symmetrically, the lower side of both ends of connecting rod (15) is fixedly provided with vertical rod (16), the lower end of vertical rod (16) is provided with push plate (17), push plate (17) is attached to the upper side of porous disc (5), the lateral lower side of calcining furnace body (1) is provided with air inlet pipe (11) and air outlet pipe (12) respectively, the communicating port of air outlet pipe (12) and calcining furnace body (1) is provided with filter screen (14).

2. The phosphogypsum calcining apparatus of claim 1, wherein: The air inlet pipe (11) and air outlet pipe (12) are tangent to the outer side of the calcining furnace body (1) and are communicated, the air inlet pipe (11) and air outlet pipe (12) are arranged on the same side of the calcining furnace body (1), and the air outlet pipe (12) is arranged above the air inlet pipe (11).

3. The phosphogypsum calcining apparatus of claim 1, wherein: The upper and lower sides of the calcining furnace body (1) are provided with observation windows (13) corresponding to the upper and lower sides of the porous disc (5).

4. The phosphogypsum calcining apparatus of claim 1, wherein: The bottom surface of the calcining furnace body (1) is a downward inclined surface converging to the return cylinder (6).

5. The phosphogypsum calcining apparatus of claim 1, wherein: The vertical rods (16) are attached to the inner wall of the calcining furnace body (1).

6. The phosphogypsum calcining apparatus of claim 1, wherein: The push plates (17) are inclined downward to one side, and the lower edges of the push plates (17) are attached to the upper surface of the porous disc (5).

7. The phosphogypsum calcining apparatus of claim 1, wherein: The lower end of the return cylinder (6) is threadedly connected to the bottom cover (18) below the calcining furnace body (1).

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