High-tower compound fertilizer returning and melting device

Abstract

The utility model provides a high-tower compound fertilizer returning and melting device. A feeding hole is formed above one end of a melting cavity, and a discharging hole is formed below the other end of the melting cavity; one end of the hollow shaft corresponding to the feed port is an air inlet end, the other end of the hollow shaft is a drain end, hollow blades are uniformly distributed on the outer wall of the hollow shaft, the uniform mixer is correspondingly connected with the discharge port of the melting cavity, a plurality of material guide ports are formed in the circumferential direction of the uniform mixing cavity, a plurality of rotors are arranged in the circumferential direction of the mixing cavity shaft, and crushing gaps are formed between the tail ends of the rotors and the inner wall of the uniform mixing cavity. The melting device is of a single-shaft hollow paddle type, a large heating area can be arranged in a small space, heat preservation can be achieved through an interlayer, heating can also be achieved through a hollow shaft and hollow paddles, large heat can be provided, the production capacity is improved, blocky materials which are not completely melted in the melting process are subjected to secondary smashing through the uniform mixing device, and the melting efficiency is improved. And blocky materials which are difficult to melt can be crushed into small particles and liquid slurry to enter the next process.

Description

Technical Field

[0001] The utility model belongs to the technical field of fertilizer production, and in particular relates to a high-tower compound fertilizer return material melting device. Background Art

[0002] In the production process of compound fertilizer produced by high tower air cooling, due to various reasons, there will be a part of unqualified products in the finished compound fertilizer. These unqualified products will be returned to the production system as part of the raw materials for secondary production, which is called return material. In the production process of compound fertilizer produced by high tower air cooling, all solid particle raw materials must be melted into liquid slurry before they can be granulated into finished compound fertilizer. The current production process basically puts these return materials into the melting tank, the primary mixing tank and the secondary mixing tank in batches. However, because these return materials are in a granular state, after entering the above equipment, the small particles will melt into liquid slurry, and the large particles are more difficult to melt. They need to be returned to the production system again for the next production. The cycle will form a vicious circle, resulting in more and more unqualified products, and the maximum number of unqualified product particles can be as high as about 30%. Due to the large amount of return material particles, if all enter the melting tank, the melting tank cannot be completely melted, which will also affect the normal production of the system.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art. The utility model provides a high-tower compound fertilizer return material melting device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high tower compound fertilizer return material melting device, comprising:

[0007] A melting chamber, wherein a feed port is provided above one end of the melting chamber, and a discharge port is provided below the other end;

[0008] A hollow shaft, wherein one end of the hollow shaft corresponding to the feed port is an air inlet end, and the other end is a hydrophobic end, hollow blades are evenly distributed on the outer wall of the hollow shaft, and a scraper plate is provided at one end of the hollow blade away from the hollow shaft;

[0009] A homogenizer, the homogenizer corresponds to the discharge port connected to the melting chamber, a columnar homogenizer is provided inside the homogenizer, a plurality of guide ports are provided circumferentially of the homogenizer, a homogenizer shaft is distributed along the axial direction of the homogenizer chamber, a plurality of rotors are provided circumferentially of the mixing chamber shaft, and a crushing gap is provided between the end of the rotor and the inner wall of the homogenizer chamber.

[0010] Preferably, the outer wall of the melting chamber is provided with a hollow interlayer, one end of the interlayer is provided with a steam inlet, and the other end is provided with a condensed water outlet.

[0011] Preferably, the melting chamber is cylindrical, one end of the melting chamber corresponding to the discharge port is inclined downward, and the hollow shaft extends along the axis of the melting chamber.

[0012] Preferably, the scraper plate is inclined to the axis of the melting chamber and is close to the inner wall of the melting chamber.

[0013] Preferably, the homogenizer comprises:

[0014] The stator is a cylindrical structure, and end plates are provided at both ends of the stator, and a feed pipe extending to a discharge port is provided on one of the end plates;

[0015] A sealing groove, an annular sealing groove corresponding to the material guide port is provided on the outside of the stator to connect the multiple material guide ports, and a discharge pipe is provided below the sealing groove.

[0016] Preferably, the scraper plate extends from one end of the inner wall of the mixing chamber to both ends of the mixing chamber to form a trapezoidal structure whose width matches the axial length of the mixing chamber.

[0017] Preferably, two ends of the hollow shaft pass through two ends of the melting cavity and are rotatably sealed and connected to the melting cavity.

[0018] Beneficial effects: The melter adopts a single-axis hollow paddle type, which can set a larger heating area in a smaller space. It can provide greater heat not only through the interlayer insulation, but also through the heating of the hollow shaft and hollow paddles, thereby improving production capacity. The block materials that are not completely melted during the melting process are crushed for the second time through the homogenizer, and the block materials that are difficult to melt can be crushed into small particles and liquid slurry to enter the next process together. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 A schematic diagram of the structure of a melting device in a specific embodiment provided by the utility model;

[0021] Figure 2 This is a schematic diagram of the hollow shaft structure in a specific embodiment provided by the utility model;

[0022] Figure 3 This is a simplified structural diagram of a homomixer in a specific embodiment provided by the utility model.

[0023] In the figure: 1. melting chamber; 2. hollow shaft; 3. hollow blade; 4. steam inlet; 5. condensate outlet; 6. feed port; 7. discharge port; 8. feed pipe; 9. second motor; 10. first motor; 11. rotor; 12. scraper plate; 13. stator; 14. mixing shaft; 15. discharge pipe; 16. sealing groove; 17. feed guide port. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0025] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0027] like Figure 1-3 As shown, a high-tower compound fertilizer return material melting device is used to melt a large number of bulk materials in the return material, including a melting chamber 1, a hollow shaft 2 and a homogenizer, wherein the melting chamber 1 is used to heat and melt the granular return material, and a feed port 6 is provided above one end of the melting chamber 1, and a discharge port 7 is provided below the other end; one end of the hollow shaft 2 corresponding to the feed port 6 is an air inlet end, and the air inlet end is connected to saturated steam through a rotary sealing joint, and the other end is a hydrophobic end for discharging the internal condensed steam, and hollow blades 3 are evenly distributed on the outer wall of the hollow shaft 2, so that the granular material (urea or ammonium nitrate phosphate) can fully and completely contact with the heated hollow shaft 2 to complete the heat transfer to the material and meet the temperature required by the process when the material is heated; at the same time, one end of the hollow shaft 2 is connected to the first motor 10 through a belt drive, and the granular material can be completely separated from the heating interface during the melting process by rotation, thereby accelerating the melting process.

[0028] The hollow blade 3 is in the shape of a hollow tube, and a scraper plate 12 is provided at one end thereof away from the hollow shaft 2, so that the material can be separated from the inner wall of the melting chamber 1 after being melted in the equipment, and the hanging plate can be used to quickly discharge the melted material, thereby reducing the content of biuret in urine.

[0029] The melted material and the large particles that are difficult to melt are discharged from the discharge port 7. In order to crush the block materials into smaller particles as much as possible, a homogenizer is arranged in the production device.

[0030] The homogenizer corresponds to the discharge port 7 connected to the melting chamber 1. The homogenizer adopts a horizontal structure. A horizontally extending columnar homogenizing chamber is arranged inside the homogenizer. A plurality of guide ports 17 are arranged circumferentially of the homogenizing chamber. The guide ports 17 can be strip-shaped or square-shaped. The plurality of guide ports 17 are evenly distributed circumferentially about the homogenizing chamber. The homogenizing shaft 14 is distributed axially along the homogenizing chamber. A plurality of rotors 11 are arranged circumferentially of the mixing chamber shaft. A crushing gap is arranged between the end of the rotor 11 and the inner wall of the homogenizing chamber. The crushing gap is controlled at 2 to 3 mm. The second motor 9 directly drives the mixing chamber shaft to rotate at a high speed. The melted material between the rotor 11 and the inner wall of the homogenizer can flow smoothly through the crushing gap. Larger granular materials can be broken up by the high-speed rotating rotor 11 and flow out.

[0031] In an optional embodiment, the outer wall of the melting chamber 1 is provided with a hollow interlayer, one end of the interlayer is provided with a steam inlet 4, and the other end is provided with a condensate outlet 5, so that a larger heating area can be provided in a smaller space, thereby improving the heating and melting efficiency. There can be multiple condensate outlets 5, and the multiple condensate outlets 5 are connected through a condensation pipe.

[0032] In an optional embodiment, the melting chamber 1 is cylindrical, one end of the melting chamber 1 corresponding to the discharge port 7 is inclined downward, and the hollow shaft 2 extends along the axis of the melting chamber 1, thereby facilitating the discharge of the melted liquid material as quickly as possible.

[0033] The scraper plate 12 is inclined to the axis of the melting chamber 1 and close to the inner wall of the melting chamber 1, and can push the material to move toward the discharge port 7, thereby increasing the discharge rate of the liquid material as soon as possible. The inclination angle of the scraper plate 12 is not greater than 15 degrees, and the inclination direction is adapted to the rotation direction of the hollow shaft 2. Specifically, the end of the scraper plate 12 corresponding to the discharge port 7 is inclined away from the turning side.

[0034] In an optional embodiment, the homogenizer includes a stator 13 and a sealing groove 16. The stator 13 is a cylindrical structure. End plates are provided at both ends of the stator 13, one of the end plates is provided with a feed pipe 8 extending to the discharge port 7, and an annular sealing groove 16 corresponding to the guide port 17 is provided on the outside of the stator 13. A discharge pipe 15 is provided below the sealing groove 16. The sealing groove 16 is an annular groove structure, and one end thereof close to the outer wall of the stator 13 is open, so as to connect multiple guide ports 17. The inner edge of the annular sealing groove 16 is adapted to the outer diameter of the stator 13, so as to be fixed by welding or other detachable forms.

[0035] In this embodiment, the scraper plate extends from one end of the mixing chamber inner wall to both ends of the mixing chamber to form a trapezoidal structure with a width matching the axial length of the mixing chamber, so that the end of the scraper plate close to the mixing shaft 14 has a feeding space.

[0036] In one embodiment, the rotor 11 is a plate, and a plurality of rotors 11 are evenly distributed around the circumference of the mixing axis 14 .

[0037] Alternatively, the rotor 11 is a block formed by a trapezoidal plate body rotating at a certain angle about the mixing axis 14. The specific corresponding angle is greater than the fan angle corresponding to the material guide port 17, which can be 15-45°.

[0038] In an optional embodiment, compound fertilizer is divided into urea-based compound fertilizer and nitro compound fertilizer. The liquid state of urea-based compound fertilizer is mainly formed by melting urea, and the liquid state of nitro compound fertilizer is mainly formed by melting ammonium nitrate phosphate. After the granular urea is melted, if it stays in the equipment for a long time, it is easy to cause excessive biuret, which will cause seedling burning; in addition, urea will also produce ammonia when it is melted, and it is necessary to prevent ammonia from escaping into the air; ammonium nitrate phosphate will have the risk of fire or explosion during the melting process. Therefore, whether it is the melting of urea or ammonium nitrate phosphate, the safety and airtightness of the melter and the timely discharge of the liquid material after melting must be considered. In this embodiment, the two ends of the hollow shaft 2 pass through the two ends of the melting chamber 1 and are connected to the melting chamber 1 in a rotating and sealed manner. During the melting process, urea will produce ammonia when it is heated up, and ammonium nitrate phosphate will have the risk of fire or explosion when it is heated up. It is necessary to avoid the escape of ammonia when melting urea and the fire or explosion when melting ammonium nitrate phosphate as much as possible to reduce environmental pollution and ensure safety.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A high tower compound fertilizer return material melting device, characterized in that: include: A melting chamber, wherein a feed port is provided above one end of the melting chamber, and a discharge port is provided below the other end; A hollow shaft, wherein one end of the hollow shaft corresponding to the feed port is an air inlet end, and the other end is a hydrophobic end, hollow blades are evenly distributed on the outer wall of the hollow shaft, and a scraper plate is provided at one end of the hollow blade away from the hollow shaft; A homogenizer, the homogenizer corresponds to the discharge port connected to the melting chamber, a columnar homogenizer is provided inside the homogenizer, a plurality of guide ports are provided circumferentially of the homogenizer, a homogenizer shaft is distributed along the axial direction of the homogenizer chamber, a plurality of rotors are provided circumferentially of the mixing chamber shaft, and a crushing gap is provided between the end of the rotor and the inner wall of the homogenizer chamber.

2. The high tower compound fertilizer return material melting device according to claim 1, characterized in that: The outer wall of the melting chamber is provided with a hollow interlayer, one end of the interlayer is provided with a steam inlet, and the other end is provided with a condensed water outlet.

3. The high tower compound fertilizer return material melting device according to claim 1, characterized in that: The melting chamber is cylindrical, one end of the melting chamber corresponding to the discharge port is inclined downward, and the hollow shaft extends along the axis of the melting chamber.

4. The high tower compound fertilizer return material melting device according to claim 2, characterized in that: The scraper plate is inclined to the axis of the melting chamber and is close to the inner wall of the melting chamber.

5. The high tower compound fertilizer return material melting device according to claim 1, characterized in that: The homogenizer comprises: The stator is a cylindrical structure, and end plates are provided at both ends of the stator, and a feed pipe extending to a discharge port is provided on one of the end plates; A sealing groove, an annular sealing groove corresponding to the material guide port is provided on the outside of the stator to connect the multiple material guide ports, and a discharge pipe is provided below the sealing groove.

6. The high tower compound fertilizer return material melting device according to claim 1, characterized in that: The scraper plate extends from one end of the inner wall of the mixing chamber to both ends of the mixing chamber to form a trapezoidal structure whose width matches the axial length of the mixing chamber.

7. The high tower compound fertilizer return material melting device according to claim 1, characterized in that: Two ends of the hollow shaft pass through two ends of the melting cavity and are rotatably sealed and connected with the melting cavity.

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