Compound fertilizer production spray drying device

Abstract

The utility model relates to compound fertilizer processing technical field, and disclose a kind of compound fertilizer production spray drying device, including spray granulator, and the side of granulating box is equipped with exhaust pipe, and one end of exhaust pipe is equipped with cleaning structure, and cleaning structure includes air induction pipe component and the support of installation at air induction pipe component bottom end, and the side top end of support is equipped with cleaning box, and the position of clear water will be lower than the top end position of outer air induction pipe, and outer air induction pipe carries out shunting to hot air and powdery compound fertilizer, and hot air and powdery compound fertilizer are introduced into clear water in box inside using inverted U shape inner tube, when the bubble generated in clear water floats, the thorn needle set will be broken to bubble, and clear water can capture powdery compound fertilizer by wetting and adhering effect, to reduce the diffusion of powdery compound fertilizer, avoid pollution external environment.

Description

Technical Field

[0001] This utility model relates to the field of compound fertilizer processing technology, specifically to a spray drying device for compound fertilizer production. Background Technology

[0002] Compound fertilizer is a fertilizer made from a mixture of two or more fertilizer raw materials. It typically contains the three major nutrients: nitrogen (N), phosphorus (P), and potassium (K), providing plants with a variety of essential nutrients. Compared to single fertilizers (such as urea, superphosphate, and potassium chloride), compound fertilizer can meet the plant's needs for multiple nutrients at once. Spray drying involves dissolving or suspending the raw materials of compound fertilizer (nitrogen, phosphorus, potassium, etc.) in water to form a fertilizer solution or slurry. This solution or slurry is then sprayed into fine droplets using a spraying device (such as a sprayer or spray tower). The sprayed droplets enter hot air (usually hot air or hot airflow), where the moisture evaporates rapidly, leaving solid particles. This process usually occurs within a few seconds to tens of seconds. The droplets quickly dry into granules, which are then carried by the airflow to a separator or cyclone separator for separation and collection.

[0003] A spray dryer with a turning mechanism, disclosed in CN222286396U, includes a housing with a drying device fixedly connected to the top. A turning mechanism is provided on the inner surface of the housing, and a cleaning mechanism is located above the turning mechanism. A sliding plate slides within a groove, engaging with a hinged seat, causing a material placement plate to swing. A sliding strip drives the sliding seat to rise and fall within the groove, thus agitating the material placement plate and turning the material. A rotating shaft drives a rotating cylinder to rotate, causing a stirring rod to turn the material on the placement plate. The rotation of an eccentric wheel drives a connecting rod to swing up and down, which in turn drives a slider to rise and fall. The rise and fall of the slider drives a connecting strip, causing a brush to rise and fall. The brush cleans the outer surface of the rotating cylinder, and the rising of the brush causes a cleaning sleeve on the brush sleeve to scrape off any material adhering to the brush surface, achieving a cleaning effect.

[0004] The aforementioned patent proposes that the lifting and lowering of the slider drives the connecting strip to raise and lower the brush, which cleans the outer surface of the rotating cylinder. However, in actual use, during spray drying, because there is no dustproof component at the hot air outlet, when the hot air enters the machine casing to remove the moisture from the fertilizer solution or slurry, it also carries away the fine particles in the material. These particles are discharged with the airflow, polluting the outside air and resulting in low safety. Summary of the Invention

[0005] The purpose of this invention is to provide a spray drying device for compound fertilizer production, so as to solve the problem mentioned in the background art of not having a dustproof component at the hot air outlet.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a spray drying device for compound fertilizer production, including a spray granulator, wherein the spray granulator includes a granulation box and a discharge pipe installed at the bottom of the granulation box, an exhaust pipe is installed on one side of the granulation box, and a cleaning structure is installed at one end of the exhaust pipe;

[0007] The cleaning structure includes an air intake tube component and a bracket installed at the bottom end of the air intake tube component, with a cleaning box installed at the top of one side of the bracket.

[0008] Preferably, the air intake pipe component includes an inverted L-shaped pipe connected to the exhaust pipe, a right-angle bend is installed at the bottom end of the inverted L-shaped pipe, an L-shaped bend is installed at one end of the right-angle bend, and both ends of the inverted L-shaped pipe, the right-angle bend and the L-shaped bend are fitted with mating rings, and bolts are installed between the mating rings.

[0009] Preferably, the inner walls of the inverted L-shaped tube, the right-angle bend, and the L-shaped bend are all coated with an anti-stick coating.

[0010] Preferably, the cleaning box includes a box body and a T-shaped tube installed through the bottom of the box body. The T-shaped tube has an internal hole, and an internal round block is installed inside the internal hole. An external lead tube is installed through the middle of the internal round block.

[0011] Preferably, an inverted U-shaped inner tube is installed at the top of the outer tube, and the bottom of the inverted U-shaped inner tube is lower than the top of the outer tube.

[0012] Preferably, a support mesh is installed inside the box, and the support mesh is installed below the top of the external lead pipe, with a barbed needle installed at the bottom of the support mesh.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The present invention discloses a spray drying device for compound fertilizer production. Hot air carries powdered compound fertilizer into the interior of the air intake pipe component through the exhaust pipe. Some of the powdered compound fertilizer remains inside the air intake pipe component. The right-angle bend moves to one side of the spray granulator to clean and recycle the powdered compound fertilizer remaining inside the air intake pipe component, so as to avoid excessive powdered compound fertilizer remaining inside the air intake pipe component, which would affect the flow of the air intake pipe component.

[0015] 2. The compound fertilizer production spray drying device of this utility model has a water level lower than the top of the external inlet pipe. The external inlet pipe diverts hot air and powdered compound fertilizer. The hot air and powdered compound fertilizer are introduced into the water inside the box through the inverted U-shaped inner pipe. When the generated bubbles rise to the surface in the water, the set needles will puncture the bubbles. The water can capture the powdered compound fertilizer through wetting and adhesion, thereby reducing the diffusion of the powdered compound fertilizer and avoiding pollution of the external environment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the spray granulator of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the air intake tube component of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the cleaning box of this utility model.

[0020] In the diagram: 1. Spray granulator; 11. Discharge pipe; 12. Granulation box; 13. Exhaust pipe; 2. Cleaning structure; 21. Air intake pipe component; 211. Inverted L-shaped pipe; 212. Right angle bend; 213. L-shaped bend; 214. Anti-stick coating; 215. Connecting ring; 216. Bolt; 22. Support; 23. Cleaning box; 231. Box body; 232. T-shaped pipe; 233. Internal hole; 234. Internal round block; 235. External intake pipe; 236. Inverted U-shaped inner pipe; 237. Support mesh; 238. Needle. 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] Example 1: Please refer to Figures 1-3 A spray drying device for compound fertilizer production includes a spray granulator 1. The spray granulator 1 includes a granulation box 12 and a discharge pipe 11 installed at the bottom of the granulation box 12. An exhaust pipe 13 is installed on one side of the granulation box 12, and a cleaning structure 2 is installed at one end of the exhaust pipe 13.

[0023] The cleaning structure 2 includes an air intake pipe component 21 and a support 22 installed at the bottom of the air intake pipe component 21. A cleaning box 23 is installed at the top of one side of the support 22. The support 22 supports the air intake pipe component 21 and the cleaning box 23. The air intake pipe component 21 will divert heat and powdered compound fertilizer. The cleaning box 23 and clean water will adhere to the powdered compound fertilizer and prevent the powdered compound fertilizer from flying.

[0024] The air intake pipe component 21 includes an inverted L-shaped pipe 211 connected to the exhaust pipe 13. A right-angle bend 212 is installed at the bottom end of the inverted L-shaped pipe 211, and an L-shaped bend 213 is installed at one end of the right-angle bend 212. Both ends of the inverted L-shaped pipe 211, the right-angle bend 212, and the L-shaped bend 213 are equipped with connecting rings 215. Bolts 216 are installed between the connecting rings 215. The right-angle bend 212 can be disassembled separately, which facilitates cleaning of the inside of the right-angle bend 212, as well as cleaning of the inside of the L-shaped bend 213 and the inverted L-shaped pipe 211 by the operator.

[0025] The inner walls of the inverted L-shaped pipe 211, right-angle bend 212 and L-shaped bend 213 are all coated with an anti-stick coating 214. The anti-stick coating 214 will make it easier for operators to clean the powdery compound fertilizer from the inner walls of the inverted L-shaped pipe 211, right-angle bend 212 and L-shaped bend 213.

[0026] In this embodiment: the fertilizer solution is pulverized into solid particles by hot air inside the granulation box 12. The compound fertilizer particles fall to the bottom of the granulation box 12. The hot air carries the powdered compound fertilizer into the air intake pipe component 21 through the exhaust pipe 13. Since the air intake pipe component 21 is curved, the hot air and powdered compound fertilizer are prevented from flowing back into the granulation box 12. Some powdered compound fertilizer remains inside the air intake pipe component 21. After long-term use, the right-angle bend 212 can be removed from between the inverted L-shaped pipe 211 and the L-shaped bend 213 by rotating the bolt 216. The right-angle bend 212 is moved to one side of the spray granulator 1 and the collection container is used to store the fertilizer. The powdery compound fertilizer remaining inside the air intake tube component 21 is collected and coated with an anti-stick coating 214 on the inner wall of the inverted L-shaped tube 211, right-angle bend 212 and L-shaped bend 213 to prevent the powdery compound fertilizer from adhering to the inner wall of the air intake tube component 21, thus improving cleaning efficiency. After cleaning, the connecting rings 215 installed at both ends of the right-angle bend 212 are aligned with the connecting rings 215 installed at one end of the inverted L-shaped tube 211 and L-shaped bend 213, respectively. The two sets of connecting rings 215 are connected with bolts 216 to prevent excessive powdery compound fertilizer remaining inside the air intake tube component 21, which would affect the flow of the air intake tube component 21.

[0027] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figure 4 The cleaning box 23 includes a box body 231 and a T-shaped pipe 232 that runs through the bottom of the box body 231. The T-shaped pipe 232 has an internal hole 233 that runs through it. An internal round block 234 is installed inside the internal hole 233. An external pipe 235 is installed through the middle of the internal round block 234. Multiple sets of external pipes 235 are provided. The external pipes 235 allow hot air and powdered compound fertilizer to flow.

[0028] An inverted U-shaped inner tube 236 is installed at the top of the outer tube 235, and the bottom of the inverted U-shaped inner tube 236 is lower than the top of the outer tube 235, so that the inverted U-shaped inner tube 236 can draw heat and powdered compound fertilizer into the clean water.

[0029] The housing 231 has a support mesh 237 installed inside, and the support mesh 237 is installed below the top of the outer tube 235. The bottom of the support mesh 237 is equipped with a needle 238. The position of the support mesh 237 is higher than the bottom of the inverted U-shaped inner tube 236.

[0030] In this embodiment: clean water is added to the inside of the housing 231, and the water level is lower than the top of the external inlet pipe 235 to prevent the clean water from flowing into the air intake pipe component 21 through the external inlet pipe 235. The hot air and powdered compound fertilizer enter the interior hole 233 through the air intake pipe component 21. The external inlet pipe 235, which is installed in the middle of the internal round block 234, diverts the hot air and powdered compound fertilizer. The inverted U-shaped inner pipe 236 introduces the hot air and powdered compound fertilizer into the clean water inside the housing 231. When the generated bubbles rise to the surface in the clean water, the set needle 238 will puncture the bubbles. The clean water can capture the powdered compound fertilizer through wetting and adhesion, thereby reducing the diffusion of the powdered compound fertilizer and avoiding pollution of the external environment.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spray drying device for compound fertilizer production, comprising a spray granulator (1), characterized in that: The spray granulator (1) includes a granulation box (12) and a discharge pipe (11) installed at the bottom of the granulation box (12). An exhaust pipe (13) is installed on one side of the granulation box (12), and a cleaning structure (2) is installed at one end of the exhaust pipe (13). The cleaning structure (2) includes an air intake tube component (21) and a bracket (22) installed at the bottom end of the air intake tube component (21). A cleaning box (23) is installed on the top side of one side of the bracket (22).

2. The spray drying device for compound fertilizer production according to claim 1, characterized in that: The air intake pipe component (21) includes an inverted L-shaped pipe (211) connected to the exhaust pipe (13). A right-angle bend (212) is installed at the bottom end of the inverted L-shaped pipe (211), and an L-shaped bend (213) is installed at one end of the right-angle bend (212). Both ends of the inverted L-shaped pipe (211), the right-angle bend (212), and the L-shaped bend (213) are equipped with a connecting ring (215), and a bolt (216) is installed between the connecting rings (215).

3. The spray drying device for compound fertilizer production according to claim 2, characterized in that: The inner walls of the inverted L-shaped tube (211), right-angle bend (212) and L-shaped bend (213) are all coated with an anti-stick coating (214).

4. The spray drying device for compound fertilizer production according to claim 1, characterized in that: The cleaning box (23) includes a box body (231) and a T-shaped tube (232) that runs through the bottom of the box body (231). The T-shaped tube (232) has an internal hole (233) running through it. An internal round block (234) is installed inside the internal hole (233). An external lead tube (235) is installed through the middle of the internal round block (234).

5. A spray drying device for compound fertilizer production according to claim 4, characterized in that: The top end of the outer tube (235) is fitted with an inverted U-shaped inner tube (236), and the bottom end of the inverted U-shaped inner tube (236) is lower than the top end of the outer tube (235).

6. The spray drying device for compound fertilizer production according to claim 5, characterized in that: The box (231) is equipped with a support net (237) inside, and the support net (237) is installed at a position lower than the top of the external tube (235). A needle (238) is installed at the bottom of the support net (237).

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