Efficient stirring controlled-release fertilizer vertical fluidized bed

Abstract

The invention relates to an efficient stirring controlled-release fertilizer vertical fluidized bed, which belongs to the field of controlled-release fertilizer processing equipment, and comprises a reaction tank body, a mounting vertical shaft and a spiral blade, a feeding opening and an exhaust opening are formed in the upper part of the reaction tank body, and a discharging opening is formed in the lower part of the reaction tank body; the mounting vertical shaft is in a hollow pipe shape and is arranged in the reaction tank body, a functional pipe is arranged in the mounting vertical shaft, the spiral blade is arranged on the mounting vertical shaft and comprises an inner supporting section and an outer supporting section, and a plurality of spraying pipes are arranged between the inner supporting section and the outer supporting section; an upper skin and a lower skin are arranged above and below the supporting section and the outer supporting section respectively, a liquid spraying head mounting hole for mounting a liquid spraying head is formed in the lower skin, and a gas through hole for high-speed gas to flow out is formed in the upper skin; a helical blade structure is matched with multi-region functional distribution, so that controlled-release fertilizer particles are continuously disturbed and directionally conveyed in a vertical channel, and the flowability and processing uniformity of the particles are improved.

Description

Technical Field

[0001] The present invention belongs to the field of controlled-release fertilizer processing equipment, and particularly relates to an efficient stirring controlled-release fertilizer vertical fluidized bed. Background Art

[0002] Controlled-release fertilizers are fertilizers that can slowly release nutrients according to the growth needs of crops, and have the advantages of reducing the number of fertilizations, improving fertilizer efficiency, and reducing environmental pollution, and have been widely used in agricultural production. In order to achieve the controlled-release function, it is usually necessary to coat a layer of material with controlled-release performance on the surface of the fertilizer particles, so that the nutrients can be slowly released within a certain time range.

[0003] At present, the production of controlled-release fertilizers mostly adopts the coating process, and there are high requirements for the fluidity, uniformity of the granular fertilizers and the distribution uniformity of the coating liquid during the coating process. Traditional coating equipment, such as drum coating machines, horizontal stirring coating machines, etc., have problems such as uneven coating, low efficiency, and high energy consumption, and it is difficult to meet the production requirements of high-quality controlled-release fertilizers in modern agriculture.

[0004] To solve the above problems, the present invention provides an efficient stirring controlled-release fertilizer vertical fluidized bed Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient stirring controlled-release fertilizer vertical fluidized bed to solve the problem of poor coating effect of existing fertilizers.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0007] An efficient stirring controlled-release fertilizer vertical fluidized bed, the vertical fluidized bed includes a reaction tank body, a mounting vertical shaft and a spiral blade;

[0008] A feeding port and an exhaust port are provided above the reaction tank body, and a discharging port is provided below;

[0009] The mounting vertical shaft is a hollow tube, arranged in the reaction tank body, and a functional tube is arranged inside, and the functional tube includes a coating agent tube, an anti-caking agent tube, a first blowing pipeline, a second blowing pipeline, and a third blowing pipeline;

[0010] The spiral blade is arranged on the mounting vertical shaft, and the spiral blade includes an inner support section and an outer support section. A plurality of spray pipes are arranged between the support section and the outer support section; upper and lower skins are respectively arranged above and below the support section and the outer support section. Spray head mounting holes for mounting spray heads are provided on the lower skin, and gas through holes for high-speed gas to flow out are provided on the upper skin;

[0011] The spray includes a jet channel and a liquid spray channel; and are respectively communicated with the functional tube through a first connection hole and a first connection hole; a plurality of exhaust through holes are provided on the jet channel.

[0012] Further, the path of the spiral blade is divided into an initial disturbance zone, a coating spraying zone, a film forming and drying zone, and an anti-caking treatment zone from top to bottom in sequence.

[0013] Further, high-speed gas with a temperature of 40 - 60°C is released above the initial disturbance zone through a first blowing pipeline.

[0014] Further, atomized coating agent is sprayed below the initial disturbance zone through a coating agent pipe, and medium-high temperature air flow with a temperature of 70 - 90°C is provided above the coating spraying zone through a second blowing pipeline.

[0015] Further, gentle air flow with a temperature of 50 - 60°C is provided above the film forming and drying zone through a third blowing pipeline to dry the coated particles.

[0016] Further, gentle hot air with a temperature of 50 - 60°C is provided above the anti-caking treatment zone through a third blowing pipeline, and anti-caking agent is sprayed below the film forming and drying zone through an anti-caking agent pipe.

[0017] Further, the installation vertical shaft adopts a rotatable installation method.

[0018] Further, an upper material spreading plate is installed on the installation vertical shaft. The upper material spreading plate is located above the spiral blade, and a lower material spreading plate is located below the spiral blade. A plurality of uniformly distributed through holes and conical protrusions are provided on the material spreading plate.

[0019] Beneficial effects:

[0020] The present disclosure adopts a spiral blade structure in combination with a multi-region functional distribution, enabling the controlled-release fertilizer particles to achieve continuous disturbance and directional transportation in the vertical channel, overcoming the problems of material accumulation and insufficient turning in traditional coating equipment, and improving the fluidity and processing uniformity of the particles.

[0021] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0023] Figure 1 It is the overall structure diagram of the embodiment of the present disclosure;

[0024] Figure 2 It is the partial structure diagram of the spiral blade of the embodiment of the present disclosure;

[0025] Figure 3 This is the structure diagram of the spray pipe in the embodiment of the present disclosure;

[0026] Figure 4 This is the structure diagram of the bulk material tray in the embodiment of the present disclosure. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In order to improve the uniformity and efficiency of controlled-release fertilizer coating processing and solve the problems of poor particle fluidity and uneven coating in traditional equipment. The present invention provides an efficient stirring controlled-release fertilizer vertical fluidized bed, which realizes the directional flow and continuous tumbling of granular fertilizers through the coordinated cooperation of a spiral blade structure, a jet port and a spray port, and uniformly sprays the coating liquid during the fluidization process to improve the stability of the coating effect and controlled-release performance.

[0029] As Figures 1-4 shown, an efficient stirring controlled-release fertilizer vertical fluidized bed includes a reaction tank body 1, a mounting vertical shaft 2, and a spiral blade 3;

[0030] The reaction tank body 1 is provided with a feeding port 13 and an exhaust port 14 at the upper part, and a discharging port 15 at the lower part;

[0031] The mounting vertical shaft 2 is a hollow tube, arranged in the reaction tank body 1, and is internally provided with functional tubes, and the functional tubes include a coating agent tube 21, an anti-caking agent tube 22, a first blowing pipeline 23, a second blowing pipeline 24, and a third blowing pipeline 24;

[0032] The spiral blade 3 is arranged on the mounting vertical shaft 2. As Figure 2 shown, the spiral blade 3 includes an inner support section 31 and an outer support section 32. A plurality of spray pipes 6 are arranged between the support section 31 and the outer support section 32. Upper skins 34 and lower skins 33 are respectively arranged above and below the support section 31 and the outer support section 32. The lower skin 33 is provided with a spray head mounting hole 331 for mounting a spray head, and gas through holes for high-speed gas to flow out are opened on the upper skin 34;

[0033] The spray pipe 6 is as Figure 3 shown, and includes a jet channel 61 and a liquid spray channel 62; and is respectively communicated with the functional tubes through a first connection hole 601 and a first connection hole 602; a plurality of exhaust through holes 603 are arranged on the jet channel 61.

[0034] In some disclosures, the path of the spiral blade 3 is divided into four functional regions from top to bottom;

[0035] The upper part is the initial disturbance zone. The high-speed gas is released through the connection between the first blowing pipeline 23 and the jet channel 61 in the initial disturbance zone, causing the fertilizer particles entering the reaction tank to quickly form a tumbling fluidized state. The temperature of the hot air is usually set at 40 - 60 °C;

[0036] Below it is the coating spraying zone. The atomized coating agent is sprayed through the connection between the coating agent pipe and the liquid spraying channel 62 in the initial disturbance zone. The second blowing pipeline 24 is connected to the jet channel 61 in the coating spraying zone to provide air flow disturbance, enabling the fertilizer particles to fully contact the coating agent and achieve uniform coating. The temperature of the hot air is usually set at 70 - 90 °C;

[0037] Continuing downward is the film-forming and drying zone. The jet channel 61 above the film-forming and drying zone is connected to the third blowing pipeline 25 to convey mild air flow, drying the coated particles and promoting the stable film formation of the coating agent on the surface of the fertilizer. The temperature of the hot air is usually set at 50 - 60 °C;

[0038] The lowermost part is the anti-caking treatment zone. The jet channel 61 above the anti-caking treatment zone is connected to the third blowing pipeline 25 to convey mild air flow, and the liquid spraying channel 62 below the film-forming and drying zone is connected to the anti-caking agent pipe 22 to spray the anti-caking agent. The temperature of the hot air is usually set at 50 - 60 °C; further improving the fluidity of the particles and preventing the particles from sticking and caking during storage and transportation, thus completing the coating processing flow of the controlled-release fertilizer.

[0039] The operation process of the above device is as follows.

[0040] The fertilizer with film is put in from the feeding port 13 and flows downward along the spiral blade 3 arranged on the installation vertical shaft 2 under the action of gravity;

[0041] The first blowing pipeline 23 starts to release high-speed air flow at a temperature of 40 - 60 °C. The gas is released at high speed through the gas through holes of the upper skin 34 via the jet channel 61, pushing the fertilizer particles to quickly form a tumbling fluidized state, improving the overall fluidity and evenly distributing them along the blade path.

[0042] The particles continue to move downward in the spiral path and enter the coating spraying zone. In this zone, the atomized coating agent is sprayed by the coating agent pipe 21 and evenly sprayed on the surface of the tumbling particles. At the same time, the second blowing pipeline 24 provides medium-high temperature air flow at a temperature of 70 - 90 °C and blows in from the jet channel 61, enabling the coating agent to fully contact the fertilizer particles and form a uniform coating layer.

[0043] The coated fertilizer particles continue to move downward and enter the film-forming drying zone. The third blowing duct 25 starts to convey mild hot air at a temperature of 50-60°C, which acts on the fertilizer particles with the coating agent on the surface, enabling the surface film layer to complete the drying process and promoting the curing of the film agent.

[0044] The particles enter the anti-caking treatment zone at the lowest section of the spiral path. The third blowing duct 25 continues to maintain a mild air flow at 50-60°C to control the overall environmental humidity and temperature. Meanwhile, the anti-caking agent pipe 22 sprays the anti-caking agent, which evenly covers the surface of the particles, further enhancing the dispersibility and anti-adhesion performance of the particles and preventing the finished product from caking during storage or transportation.

[0045] The controlled-release fertilizer particles after processing are discharged through the discharge port 15 provided at the bottom of the reaction tank body 1, completing the entire film coating operation process.

[0046] In some disclosures, the installation vertical shaft 2 can rotate. With such a design, the spiral blades 3 can form a dynamic relative movement with the material during operation, promoting the fluidization and uniform distribution of the fertilizer particles in the vertical channel, and enhancing the spraying uniformity and film-forming quality.

[0047] An upper material dispersing plate is installed on the installation vertical shaft 2. The upper material dispersing plate 4 is located above the spiral blades 3, and the lower material dispersing plate 7 is located below the spiral blades 3. The material dispersing plate is provided with a plurality of uniformly distributed through holes 71 and conical protrusions 72. With such a design, the aggregated particles can be effectively dispersed, avoiding problems such as accumulation, blockage, or knotting caused by adhesion between particles.

[0048] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0049] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. The present specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An efficient stirring controlled-release fertilizer vertical fluidized bed, characterized in that The vertical fluidized bed includes a reaction tank body, a mounting vertical shaft, and a spiral blade; A feeding port and an exhaust port are provided above the reaction tank body, and a discharging port is provided below; The mounting vertical shaft is a hollow tube, which is arranged in the reaction tank body and internally provided with a functional tube. The functional tube includes a coating agent tube, an anti-caking agent tube, a first blowing pipeline, a second blowing pipeline, and a third blowing pipeline; The spiral blade is arranged on the mounting vertical shaft. The spiral blade includes an inner support section and an outer support section. A plurality of spray pipes are arranged between the support section and the outer support section. An upper skin and a lower skin are respectively arranged above and below the support section and the outer support section. Spray head mounting holes for mounting spray heads are provided on the lower skin, and gas through holes for allowing high-speed gas to flow out are opened on the upper skin; The spray includes a jet channel and a liquid spray channel; they are respectively communicated with the functional tube through a first connection hole and a first connection hole; a plurality of exhaust through holes are provided on the jet channel.

2. The high-efficiency stirring controlled-release fertilizer vertical fluidized bed according to claim 1, characterized in that The path of the spiral blade is divided into an initial disturbance area, a coating spraying area, a film forming and drying area, and an anti-caking treatment area in sequence from top to bottom.

3. The high-efficiency stirring controlled-release fertilizer vertical fluidized bed according to claim 1, characterized in that, High-speed gas with a temperature of 40-60°C is released through the first blowing pipeline above the initial disturbance area.

4. The high-efficiency stirring controlled-release fertilizer vertical fluidized bed according to claim 2, characterized in that, Atomized coating agent is sprayed through the coating agent tube below the initial disturbance area, and medium-high temperature air flow with a temperature of 70-90°C is provided through the second blowing pipeline above the coating spraying area.

5. The high-efficiency stirring controlled-release fertilizer vertical fluidized bed according to claim 2, characterized in that, Mild air flow with a temperature of 50-60°C is provided by the third blowing pipeline above the film forming and drying area to dry the coated particles.

6. The high-efficiency stirring controlled-release fertilizer vertical fluidized bed according to claim 2, characterized in that, Mild hot air with a temperature of 50-60°C is provided by the third blowing pipeline above the anti-caking treatment area, and anti-caking agent is sprayed through the anti-caking agent tube below the film forming and drying area.

7. An efficient stirring controlled-release fertilizer vertical fluidized bed according to claim 1, characterized in that, The mounting vertical shaft adopts a rotatable mounting method.

8. The vertical fluidized bed of an efficient stirring controlled-release fertilizer according to claim 1, wherein An upper material dispersing plate is mounted on the mounting vertical shaft. The upper material dispersing plate is located above the spiral blade, and a lower material dispersing plate is located below the spiral blade. A plurality of uniformly distributed through holes and conical protrusions are provided on the material dispersing plate.

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