Fluidized bed for coating sustained and controlled release fertilizer

Abstract

The utility model discloses a sustained and controlled release fertilizer coating fluidized bed. The sustained and controlled release fertilizer coating fluidized bed comprises a shell, a feeding hopper is arranged at the top of the shell, a discharging hopper is arranged at the bottom of the shell, an air inlet pipe is arranged on the side wall of the bottom of the shell, an air outlet pipe is arranged on the side wall of the top of the shell, an inner cavity of the shell is divided into a preheating chamber, a coating chamber and a drying chamber from top to bottom, and the coating chamber is provided with a plurality of spraying pipes. A pair of door plates hinged to the shell is arranged below the spraying pipe, the two door plates are flush to prevent fertilizer particles from falling, the door plates are made of air distribution plates, and a driving mechanism is arranged on the inner wall of the shell and used for opening and closing the door plates. The utility model solves the problem that the product quality is influenced due to nonuniform film coating in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of waste production equipment, and in particular to a controlled-release fertilizer coated fluidized bed. Background Technology

[0002] There is an existing Chinese utility model patent with publication number CN204958755U, entitled "A Bio-fertilizer Coating Device". In operation, organic fertilizer granules are added at a uniform speed through the inlet. The granules fall onto a first inclined plate and roll to the right. At this time, a spray component on the first inclined plate sprays a biological bacterial solution onto the granules. The granules then flow to a second inclined plate for heating and drying, causing the dried bacterial solution to coat the outer surface of the granules, forming a microbial coating. The granules then flow to a third and fourth inclined plate, repeating the spraying and drying process. However, the rolling speed of the organic fertilizer granules on the first and third inclined plates cannot be controlled, leading to uneven coating and affecting product quality. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a controlled-release fertilizer coating fluidized bed that can improve the coating uniformity and thus ensure product quality.

[0004] To achieve the above objectives, the technical solution adopted by the controlled-release fertilizer coated fluidized bed of this utility model is as follows:

[0005] A controlled-release fertilizer coated fluidized bed includes a shell, a feed hopper at the top of the shell, a discharge hopper at the bottom of the shell, an air inlet pipe on the bottom side wall of the shell, and an air outlet pipe on the top side wall of the shell. The inner cavity of the shell is divided into a preheating chamber, a coating chamber, and a drying chamber from top to bottom. The coating chamber is equipped with several spray pipes. Below the spray pipes is a pair of door panels that are hinged to the shell. When the two door panels are flush, they prevent fertilizer particles from falling. The door panels are made of air distribution plates. A drive mechanism is provided on the inner wall of the shell for opening and closing the door panels.

[0006] Preferably, the driving mechanism includes a cylinder fixed to the inner wall of the housing, the cylinder being located between the two door panels, a connecting plate being fixed to the telescopic end of the cylinder, connecting rods being hinged to both ends of the connecting plate, and the other end of the connecting rods being hinged to the corresponding door panel.

[0007] Preferably, a limiting slope is provided on the edge of the door panel away from the connecting rod, and a limiting strip is provided on the inner wall of the housing to cooperate with the limiting slope.

[0008] Preferably, the preheating chamber is provided with a preheating diversion plate, which faces the feed hopper. There is a gap between the two ends of the preheating diversion plate and the inner wall of the shell. A preheating inclined plate is provided below the gap. The preheating inclined plate guides the fertilizer particles to the coating chamber. Both the preheating diversion plate and the preheating inclined plate are made of air distribution plates.

[0009] Preferably, the coating chamber is further provided with a coating diversion plate, which is directly opposite the gap between the two preheating inclined plates and is located above the spray pipe. The coating diversion plate is made of an air distribution plate.

[0010] Preferably, the drying chamber is provided with a pair of drying inclined plates, with each drying inclined plate corresponding to a door panel. A drying diversion plate is provided below the drying inclined plates, and the drying diversion plate is directly opposite the gap between the two drying inclined plates. Both the drying inclined plates and the drying diversion plate are made of air distribution plates.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] After being preheated, the fertilizer granules remain in the coating chamber, where they continuously tumble and boil on the door panel. At the same time, coating material is sprayed through the spray pipe, which improves the uniformity of the coating and thus ensures product quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the controlled-release fertilizer coated fluidized bed of this utility model.

[0014] Figure 2 This is a diagram showing the door panel open.

[0015] The components include: 1. Shell; 11. Preheating chamber; 111. Preheating diversion plate; 112. Preheating inclined plate; 12. Coating chamber; 121. Spray pipe; 122. Door panel; 1221. Limiting slope; 123. Diversion plate; 124. Limiting strip; 13. Drying chamber; 131. Drying inclined plate; 132. Drying diversion plate; 14. Drive mechanism; 141. Cylinder; 142. Connecting plate; 143. Connecting rod; 2. Feed hopper; 3. Discharge hopper; 4. Air inlet pipe; 5. Air outlet pipe. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0017] like Figure 1-2As shown, a controlled-release fertilizer coated fluidized bed includes a shell 1, a feed hopper 2 installed at the top of the shell with an automatic valve, a discharge hopper 3 installed at the bottom of the shell, an air inlet pipe 4 installed on the bottom side wall of the shell, and an air outlet pipe 5 installed on the top side wall of the shell. The inner cavity of the shell is divided into a preheating chamber 11, a coating chamber 12, and a drying chamber 13 from top to bottom. A preheating diversion plate 111 is installed in the preheating chamber, facing the feed hopper. There is a gap between the two ends of the preheating diversion plate and the inner wall of the shell. A preheating inclined plate 112 is installed below the gap, which guides the fertilizer particles to the coating chamber. Several spray pipes 121 are installed in the coating chamber. A pair of door panels 122, hinged to the shell, are arranged below the spray pipes. The two sides of the middle of the door panels are hinged to the shell. When the two door panels are flush, they prevent the fertilizer particles from falling. A coating diversion plate 123 is installed above the spray pipes, facing the gap between the two preheating inclined plates, which evenly distributes the preheated fertilizer particles. The guide door panel ensures a more uniform distribution of fertilizer granules falling onto it, which is beneficial for improving the uniformity of the coating. A drive mechanism 14 is installed on the inner walls of both sides of the housing for opening and closing the door panel. The drive mechanism includes a cylinder 141 fixed to the inner wall of the housing, with the cylinder located between the two door panels. The telescopic end of the cylinder is fixed to a connecting plate 142, and the two ends of the connecting plate are hinged to connecting rods 143. The bottom end of the connecting rod is hinged to the connecting plate, and the top end of the connecting plate is hinged to the corresponding door panel. A limiting slope 1221 is opened on the edge of the door panel away from the connecting rod. A limiting strip 124 that cooperates with the limiting slope is installed on the inner wall of the housing. A pair of drying inclined plates 131 are installed in the drying chamber, with each drying inclined plate corresponding to a door panel. A drying diversion plate 132 is installed below the drying inclined plates, with the drying diversion plate directly facing the gap between the two drying inclined plates. The preheating diversion plate, preheating inclined plate, coating diversion plate, door panel, drying inclined plate, and drying diversion plate are all made of air distribution plate.

[0018] The specific working process and principle of this utility model are as follows: Hot air is introduced into the shell through the air inlet pipe. The hot air moves upward and is discharged through the air outlet pipe to form a circulation. The automatic valve of the feed hopper is opened, and a certain amount of fertilizer granules enter the preheating chamber. The preheating diversion plate and the preheating inclined plate extend the preheating path of the fertilizer granules, thereby improving the preheating effect of the fertilizer granules. After the preheating is completed, the fertilizer granules are diverted by the coating diversion plate and fall onto two door plates respectively. Under the action of hot air, they tumble and boil. The spray pipe sprays the coating material. After a certain period of time, the cylinder is opened. The telescopic end of the cylinder extends, and the connecting rod pushes one edge of the door plate upward. The door plate flips and tilts. The coated fertilizer granules slide down and enter the drying chamber. The drying inclined plate and the drying diversion plate extend the drying path of the coated fertilizer granules, thereby improving the drying effect. Finally, the product is discharged from the discharge hopper and collected. The telescopic end of the cylinder retracts, the connecting rod pulls the door plate, and the limiting slope and the limiting strip are completely attached. The door plate resets and waits for the next cycle. This invention uses a pair of flip-up door panels to intercept falling fertilizer granules, allowing the fertilizer granules to be coated in a fixed area, thereby improving the uniformity of the coating and thus improving product quality.

Claims

1. A slow controlled release fertilizer coated fluidized bed, comprising a shell, a feeding hopper is arranged at the top of the shell, a discharging hopper is arranged at the bottom of the shell, an air inlet pipe is arranged on the sidewall of the bottom of the shell, and an air outlet pipe is arranged on the sidewall of the top of the shell, characterized in that: The inner cavity of the shell is divided into a preheating chamber, a coating chamber and a drying chamber from top to bottom, the coating chamber is provided with a plurality of spray pipes, a pair of door plates hinged to the shell is arranged below the spray pipes, the two door plates are flush to prevent the fertilizer particles from falling, the door plates are made of cloth air distribution plates, a driving mechanism is arranged on the inner wall of the shell for opening and closing the door plates.

2. The slow controlled release fertilizer of claim 1, wherein: The driving mechanism comprises a cylinder fixed to the inner wall of the shell, the cylinder is between the two door plates, a connecting plate is fixed to the extension end of the cylinder, connecting rods are hinged to the two ends of the connecting plate, and the other ends of the connecting rods are hinged to the corresponding door plates.

3. The slow controlled release fertilizer of claim 2, wherein: A limiting slope surface is formed on the side edge of the door plate away from the connecting rod, and a limiting strip matched with the limiting slope surface is arranged on the inner wall of the shell.

4. The slow controlled release fertilizer of claim 1, wherein: The preheating chamber is provided with a preheating baffle, the preheating baffle is opposite to the feeding hopper, gaps are left between the two ends of the preheating baffle and the inner wall of the shell, a preheating inclined plate is arranged below the gaps, the preheating inclined plate guides the fertilizer particles to the coating chamber, and the preheating baffle and the preheating inclined plate are made of cloth air distribution plates.

5. The slow controlled release fertilizer of claim 4, wherein: The coating chamber is also provided with a coating baffle, the coating baffle is opposite to the gap between the two preheating inclined plates, the coating baffle is above the spray pipes, and the coating baffle is made of a cloth air distribution plate.

6. The slow controlled release fertilizer of claim 1, wherein: The drying chamber is provided with a pair of drying inclined plates, the drying inclined plates and the door plates are in one-to-one correspondence, drying baffles are arranged below the drying inclined plates, the drying baffles are opposite to the gaps between the two drying inclined plates, and the drying inclined plates and the drying baffles are made of cloth air distribution plates.

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