Cooling device for chemical fertilizer production and processing

Abstract

This utility model belongs to the field of fertilizer production technology, specifically disclosing a cooling device for fertilizer production and processing, including an inner shell and an outer shell. A feed pipe for containing fertilizer granules is provided in the inner shell, and an installation port is provided at the bottom of the inner shell. The feed pipe is connected to the installation port, and inlet and outlet ports are respectively provided at the upper and lower ends of the feed pipe. An inner cooling cavity is formed between the feed pipe and the inner shell, and an outer cooling cavity is formed between the inner shell and the outer shell. A first inner water inlet pipe and a first inner water outlet pipe are connected to the inner shell to connect to the inner cooling cavity, and a first outer water inlet pipe and a first outer water outlet pipe are installed on the outer shell to connect to the outer cooling cavity. The dual-cavity structure achieves staged cooling. The inner cooling cavity directly contacts the feed pipe to initially cool the fertilizer granules, while the outer cooling cavity forms a secondary insulation barrier through the outer shell, thus improving cooling efficiency and reducing energy loss.

Description

Technical Field

[0001] This utility model belongs to the field of fertilizer production technology, specifically relating to a cooling device for fertilizer production and processing. Background Technology

[0002] In fertilizer production, granule cooling is a crucial step in the granulation process, directly impacting product quality and subsequent storage stability. If high-temperature fertilizer granules cannot be cooled quickly, problems such as clumping and nutrient loss can easily occur, while residual heat loss also leads to energy waste. Existing cooling devices mostly employ single-layer cooling structures, resulting in low cooling efficiency and insufficient heat exchange between the cooling medium and the material. Furthermore, traditional devices lack effective heat recovery barriers, causing a significant amount of heat to be directly lost to the environment during the cooling process. Utility Model Content

[0003] To address the issue of insufficient cooling efficiency in existing fertilizer granule technologies, a cooling device for fertilizer production and processing is proposed. This device achieves rapid initial cooling through direct contact between the inner cooling chamber and the feed pipe, while the outer cooling chamber forms a secondary insulation barrier, effectively reducing energy loss while improving cooling efficiency. This utility model provides the following technical solution: A cooling device for fertilizer production and processing includes an inner shell and an outer shell. A feed pipe for containing fertilizer granules is disposed within the inner shell. An installation port is located at the bottom of the inner shell, and the feed pipe is connected to the installation port. An inlet and an outlet are respectively located at the upper and lower ends of the feed pipe. An inner cooling cavity is formed between the feed pipe and the inner shell, and an outer cooling cavity is formed between the inner shell and the outer shell. A first inner water inlet pipe and a first inner water outlet pipe are connected to the inner shell to connect to the inner cooling cavity, and a first outer water inlet pipe and a first outer water outlet pipe are installed on the outer shell to connect to the outer cooling cavity.

[0004] Preferably, both the inner shell and the outer shell are cylindrical, and both the inner shell and the outer shell are connected to an end cap with a connection port on the end cap. The guide tube is connected to the connection port.

[0005] Preferably, the end cap includes an annular sealing portion and a conical portion. The annular sealing portion is connected to the inner shell and the outer shell and covers the upper side of the outer cooling cavity. The conical portion is disposed on the inner side of the inner shell and arranged on the upper side of the inner cooling cavity. The connection port is disposed at the bottom end of the conical portion.

[0006] Preferably, a blower pipe is provided above the conical portion, with the lower end of the blower pipe facing the connection port.

[0007] Preferably, the blower tube is connected to the conical part by a mounting bracket, the mounting bracket including at least three support rods, each support rod being arranged at equal intervals around the circumference of the blower tube.

[0008] Preferably, the feed tube is a spiral tube.

[0009] Preferably, the feed tube is a tapered spiral tube whose spiral radius gradually increases and then decreases again in the vertical direction.

[0010] Preferably, both the upper and lower ends of the feed tube are vertical tubes.

[0011] Preferably, the inner shell and the outer shell are set at the same height.

[0012] Preferably, the first inner water inlet pipe and the first inner drain pipe pass through the outer shell and the inner shell and are connected to the inner cooling cavity.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The dual-cavity structure of the inner and outer cooling cavities achieves staged cooling. The inner cooling cavity directly contacts the feed pipe to initially cool the fertilizer particles, while the outer cooling cavity forms a secondary insulation barrier through the outer shell, which improves cooling efficiency and reduces energy loss. 2. The feed pipe adopts a tapered spiral design with the spiral radius gradually increasing and decreasing in the vertical direction, which extends the downward path of fertilizer particles, increases the contact time between the material and the pipe wall in a limited space, and allows the cooling medium to fully absorb the heat of reaction, thereby improving the processing capacity per unit volume. 3. The conical part of the end cap forms a funnel structure, which, together with the air blowing pipe, blows air in a direction at the feed inlet of the feed pipe to form a local airflow circulation, accelerates the heat exchange rate and prevents the high-temperature fertilizer particles from sticking together, and keeps the feed pipe inlet unobstructed. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the feed tube of this utility model; In the attached drawings: 1. Inner shell; 11. Mounting port; 12. First inner water inlet pipe; 13. First inner drain pipe; 2. Outer shell; 21. First outer water inlet pipe; 22. First outer drain pipe; 3. Guide pipe; 31. Feed inlet; 32. Discharge outlet; 33. Limiting ring; 4. Inner cooling cavity; 5. Outer cooling cavity; 6. End cap; 61. Ring seal; 62. Conical part; 7. Air blowing pipe; 8. Mounting bracket; 9. Mounting ring; 10. Positioning cylinder; 110. Bracket. Detailed Implementation

[0015] The directional terms mentioned in the following embodiments, such as "up", "down", "left", and "right", are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the invention of this utility model.

[0016] like Figure 1-3 As shown, a cooling device for fertilizer production and processing includes an inner shell 1, an outer shell 2 installed outside the inner shell 1, a feed pipe 3 for containing fertilizer granules disposed in the inner shell 1, an installation port 11 at the bottom of the inner shell 1, an installation ring 9 fixedly connected to the upper side of the installation port 11, the feed pipe 3 being inserted into the installation ring 9 and connected to the installation port 11, and an inlet 31 and an outlet 32 ​​respectively disposed at the upper and lower ends of the feed pipe 3; an inner cooling cavity 4 is formed between the feed pipe 3 and the inner shell 1, and an outer cooling cavity 5 is formed between the inner shell 1 and the outer shell 2; a first inner... The water inlet pipe 12 and the first internal drain pipe 13 pass through the outer shell 2 and the inner shell 1 and are connected to the inner cooling cavity 4. The outer shell 2 is equipped with the first external water inlet pipe 21 and the first external drain pipe 22 for connecting the outer cooling cavity 5. The internal and external dual cooling cavity structure realizes staged cooling. The inner cooling cavity 4 directly contacts the feed pipe 3 to perform preliminary cooling of fertilizer particles. The outer cooling cavity 5 forms a secondary heat preservation barrier through the outer shell 2, which improves cooling efficiency and reduces energy loss. The cooling media in the inner cooling cavity 4 and the outer cooling cavity 5 include, but are not limited to, pure water, ethylene glycol solution and propylene glycol solution.

[0017] Specifically, both the inner shell 1 and the outer shell 2 are cylindrical, which allows the cooling medium to form an annular flow path in the cold cavity, reducing fluid dead zones and ensuring that the cooling medium evenly covers the entire surface of the guide tube 3. The inner shell 1 and the outer shell 2 are connected to an end cap 6, which has a connection port. A positioning cylinder 10 is fixedly connected to the lower side of the connection port. A limit ring 33 is provided at the upper end of the guide tube 3. The guide tube 3 is inserted into the positioning cylinder 10, and the bottom end of the positioning cylinder 10 abuts against the limit ring 33 to form a stable connection. During installation, the guide tube 3 can be connected to the installation port 11 first, and then the end cap 6 can be screwed on to fix the guide tube 3 and simultaneously seal the outer cold cavity 5 and the inner cold cavity 4.

[0018] Specifically, the end cap 6 includes an annular sealing portion 61 and a conical portion 62. The annular sealing portion 61 is connected to the inner shell 1 and the outer shell 2 and covers the upper side of the outer cooling cavity 5. The conical portion 62 is located inside the inner shell 1 and arranged on the upper side of the inner cooling cavity 4. The connection port is located at the bottom end of the conical portion 62. The conical portion 62 can form a funnel to improve the material feeding efficiency.

[0019] Specifically, a blower pipe 7 is provided above the conical part 62. The upper end of the blower pipe 7 is connected to a positive pressure air source through a hose, and the lower end of the blower pipe 7 faces the connection port, which can blow air in a direction. This forms a local airflow circulation at the feed inlet 31 of the feed guide pipe 3 and accelerates the heat exchange rate, preventing the high-temperature fertilizer particles from sticking together at this point and keeping the feed guide pipe 3 inlet unobstructed.

[0020] Specifically, the blower 7 is connected to the conical part 62 via the mounting bracket 8. The mounting bracket 8 includes four support rods, each of which is arranged at equal intervals around the circumference of the blower 7 to ensure that the blower 7 is fixed and stable, and to avoid the tube body shifting due to airflow vibration. At the same time, the equal-spaced structure reduces the concentrated effect on the surface stress of the conical part 62.

[0021] Specifically, the feed pipe 3 is a tapered spiral pipe with a spiral radius that gradually increases and then decreases again in the vertical direction. This extends the downward path of the fertilizer granules, increases the contact time between the material and the pipe wall within a limited space, allows the cooling medium to fully absorb the heat of reaction, and improves the unit volume processing capacity. Furthermore, the change in its spiral radius allows the material to undergo variable speed motion during the conveying process. The upper small-radius section accelerates the initial cooling of the material, the middle expansion section reduces the flow rate and enhances heat exchange, and the lower narrowing section increases the outlet flow rate to prevent blockage.

[0022] Specifically, the upper and lower ends of the feed pipe 3 are both vertical pipes, which can eliminate the rotational inertia caused by the spiral structure, allowing fertilizer particles to enter and leave the feed pipe 3 vertically.

[0023] Specifically, the inner shell 1 and the outer shell 2 are set at the same height to ensure a reasonable volume ratio of the cold cavity. The medium capacity of the outer cold cavity 5 matches the requirements of the inner cold cavity 4, keeping the center of gravity of the overall device in the center and improving operational stability.

[0024] Specifically, it also includes a bracket 110, which is a square table with a circular positioning groove. The inner shell 1 and the outer shell 2 are installed on the positioning groove. The positioning groove has a through hole that communicates with the discharge port 32. A valve body for controlling the flow rate of fertilizer granules is installed and fixed at the bottom of the bracket 110.

Claims

1. A cooling device for fertilizer production and processing, characterized in that, The device includes an inner shell (1), an outer shell (2) installed outside the inner shell (1), a feed pipe (3) for containing fertilizer granules is provided in the inner shell (1), an installation port (11) is provided at the bottom of the inner shell (1), the feed pipe (3) is connected to the installation port (11), and the upper and lower ends of the feed pipe (3) are respectively provided with a feed inlet (31) and a discharge outlet (32); an inner cooling cavity (4) is formed between the feed pipe (3) and the inner shell (1), and an outer cooling cavity (5) is formed between the inner shell (1) and the outer shell (2); a first inner water inlet pipe (12) and a first inner drain pipe (13) for connecting the inner cooling cavity (4) are connected on the inner shell (1), and a first outer water inlet pipe (21) and a first outer drain pipe (22) for connecting the outer cooling cavity (5) are installed on the outer shell (2).

2. The cooling device for fertilizer production and processing according to claim 1, characterized in that, The inner shell (1) and the outer shell (2) are both cylindrical. The inner shell (1) and the outer shell (2) are connected to an end cap (6). The end cap (6) is provided with a connection port. The guide tube (3) is connected to the connection port.

3. The cooling device for fertilizer production and processing according to claim 2, characterized in that, The end cap (6) includes an annular sealing portion (61) and a conical portion (62). The annular sealing portion (61) is connected to the inner shell (1) and the outer shell (2) and covers the upper side of the outer cooling cavity (5). The conical portion (62) is located inside the inner shell (1) and arranged on the upper side of the inner cooling cavity (4). The connection port is located at the bottom end of the conical portion (62).

4. The cooling device for fertilizer production and processing according to claim 3, characterized in that, A blower pipe (7) is provided above the conical part (62), with the lower end of the blower pipe (7) facing the connection port.

5. The cooling device for fertilizer production and processing according to claim 4, characterized in that, The blower pipe (7) is connected to the conical part (62) by a mounting bracket (8). The mounting bracket (8) includes at least three support rods, each of which is arranged at equal intervals around the blower pipe (7).

6. The cooling device for fertilizer production and processing according to claim 1, characterized in that, The feed tube (3) is a spiral tube.

7. The cooling device for fertilizer production and processing according to claim 6, characterized in that, The feed tube (3) is a tapered spiral tube whose spiral radius increases and decreases again in the vertical direction.

8. The cooling device for fertilizer production and processing according to claim 6 or 7, characterized in that, The upper and lower ends of the feed tube (3) are both vertical tubes.

9. The cooling device for fertilizer production and processing according to claim 1, characterized in that, The inner shell (1) and the outer shell (2) are set at the same height.

10. The cooling device for fertilizer production and processing according to claim 9, characterized in that, The first inner water inlet pipe (12) and the first inner drain pipe (13) pass through the outer shell (2) and the inner shell (1) and are connected to the inner cooling cavity (4).

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