WO2020133697A1

WO2020133697A1 - Multi-functional continuous coating device for fertilizer

Info

Publication number: WO2020133697A1
Application number: PCT/CN2019/077224
Authority: WO
Inventors: 王瑞; 操素芬; 王仁宗; 吴初柱; 孙金艳; 王应宗
Original assignee: 湖北富邦科技股份有限公司
Priority date: 2018-12-27
Filing date: 2019-03-06
Publication date: 2020-07-02
Also published as: MA53781B1; MA53781A1; CN209442890U

Abstract

The present invention relates to a multi-functional continuous coating device for fertilizer, comprising a coating roller, a heating jacket, preparation tanks, material pumps, conveying pipelines, and atomizing nozzles, wherein a feeding port and a discharging port are respectively designed on the two ends of the coating roller, the coating roller is divided into a pre-coating area, a first coating area, ... and an Nth coating area from the feeding end to the discharging end, the heating jacket is wrapped around the outer periphery of the coating roller, retaining rings are respectively installed between different coating areas inside the coating roller, and the atomizing nozzle is respectively installed from the first coating area to the Nth coating area; the atomizing nozzle in each coating area is connected with an outlet of one material pump through one conveying pipeline, a flow meter is installed on each conveying pipeline, each material pump is connected with one preparation tank, and each material pump performs chain control respectively through the flow meter and an external PLC. The present utility model may be applied in a variety of scenes, and has advantages of precise control, uniform coating, high efficiency, large yield, continuity, automation, flexibility, and the like.

Description

Multifunctional continuous coating equipment for fertilizer

Technical field

The invention relates to the technical field of new fertilizer coating, in particular to a multifunctional continuous coating equipment for fertilizers.

technical background

In recent years, the Ministry of Agriculture and other documents such as "Zero Growth of Chemical Fertilizers" have been issued one after another. Reducing quantity, increasing efficiency, and upgrading quality have become the main theme of the fertilizer industry. Under the general trend, all kinds of value-added and efficiency-increasing new fertilizers are emerging like mushrooms, and there are a wide range of products. The relevant fertilizer standards are also gradually introduced. A revolution in the fertilizer industry is in progress, entering a state of unprecedented prosperity. Has promoted the progress of the fertilizer industry. Many large domestic fertilizer manufacturers such as urea and ammonium phosphate have been actively exploring product upgrades. The more common route is to add trace elements, microbial bacteria, humic acid, etc. to chemical fertilizers. In the process of adding the above substances to fertilizers, fertilizer coating technology is often used. This method is simple and easy to implement. In addition, the production of slow-release fertilizer, controlled-release fertilizer, medicinal fertilizer, etc. also needs to be coated. Most of the slow and controlled release fertilizers use spraying technology, spraying organic materials such as resin or molten sulfur on the surface of the fertilizer.

Patent CN107602219A discloses a continuous spray coating equipment for spraying protective liquid in the preparation of medicinal fertilizers. The device has a simple structure and a single use. Patent CN201276502Y discloses a device for continuous production of coated controlled-release fertilizer. The device is a fluidized bed device with relatively low production capacity and inconvenient operation control. Patent CN201347414Y discloses a fertilizer coating equipment. The equipment is vertical. The equipment is fluidized and coated by hot air. It can be used for fertilizer coating, food processing or pharmaceuticals. The production capacity is low. Patent CN201923959U discloses a sulfur-impregnated centrifugal coating machine, which puts granular fertilizer into liquid sulfur. After the fertilizer coating is completed, the centrifuge is used to centrifuge the excess liquid sulfur. The operation of the equipment is cumbersome and there are certain safety risks. It is difficult to increase production capacity, and there are many application problems in practice. Patent CN203794808U discloses a fertilizer coating device, which has a simple structure, but also has the problems of single function and uneven coating. Patent CN205603478U discloses a special coating machine for sulfur-coated slow-release urea. This equipment is mainly aimed at the production of sulfur-coated slow-release urea and cannot be used as a coating for other types of fertilizers. Patent CN207468518U discloses a rotary drum coating equipment, which is a vertical type, which is a further improvement of the vibrating fluidized bed coating equipment. After the fertilizer is in a fluidized state, the coating liquid is sprayed from bottom to top. For the batch process, the production capacity is very low. Patent CN108976018A discloses a medium trace element mixture and the preparation method of the trace element fertilizer in the package, which is different from the coating of pure sulfur coated slow-release fertilizer. The coating liquid in this patent is a medium trace element mixture, the main component It is liquid sulfur with medium trace elements and disintegrating substances added at the same time. The composition of the coating is more complicated and the coating is more difficult. The patent mentions that the coating equipment is a disc, drum or fluidized bed device, but the The patent does not describe the coating equipment in detail.

Commonly used in fertilizer coating equipment are discs, rollers or fluidized beds. Among them, discs and fluidized bed equipment are mostly intermittent production processes, which have relatively low production capacity and inconvenient operation. At present, the coating equipment generally coats a certain type of fertilizer with a single function and low efficiency. For the coating of complex systems, such as using a variety of coating materials to coat fertilizers to form multilayer films, the current traditional coating equipment can no longer meet the requirements, and there is an urgent need to develop new coating equipment.

Summary of the invention

In view of the shortcomings of the existing coating equipment, the object of the present invention is to provide a multifunctional continuous coating equipment for fertilizers. This equipment can realize sulfur coating, plant nutrient solution coating, medicine fertilizer coating, fertilizer auxiliary coating, etc., and has the advantages of precise control, uniform wrapping, high efficiency, high output, continuous output, automation, flexibility, flexibility, etc. .

The technical solution of the present invention is as follows:

A multi-functional continuous coating equipment for fertilizers, including a coating drum, a heating jacket, N preparation tanks, N material pumps, conveying pipelines, atomizing nozzles, N is a natural number greater than 1, feed inlet, discharge The mouth is designed on the two ends of the coating drum. The coating drum is divided into a pre-coating zone, a first coating zone, ... and an N-th coating zone from the feeding end to the discharging end. The heating jacket is characterized in that: a retaining ring is respectively installed between different coating areas inside the coating drum, wherein atomizing nozzles are installed in the first coating area to the Nth coating area; each coating area The atomizing nozzle is connected to the outlet of a material pump through a conveying pipeline. A flow meter is installed on each conveying pipeline. Each material pump is connected to a preparation tank. Each material pump is controlled by an external PLC through a chain.

The heating method of the heating jacket is an electric heating rod, an electric heating plate, an electric heating belt or a built-in steam heating coil. A temperature sensor is installed in the heating jacket. The temperature sensor is connected to an external PLC and is controlled by the PLC. Needs precise adjustment.

Retaining rings are also installed at both ends of the drum.

The pre-envelope area is the envelope preparation stage, and no nozzle is provided. The automatic addition of liquid from the first envelope area to the Nth envelope area is independent of each other, and the same substance can be added, or different substances can be added in different envelope areas as needed. The number of nozzles in each envelope zone from the first envelope zone to the Nth envelope zone is 1-3.

A lifting plate is installed on the inner wall of the coating drum along the axial direction, and the lifting plate is a strip-shaped angle steel. The angle of the strip angle steel is 45°-90°, and the number of lifting plates in each envelope area is 3-9.

The length of the pre-coating zone of the coating drum accounts for 1/4-1/2 of the total length of the drum, and the lengths of the first to N-th coating zone are the same.

The angle between the film drum and the horizontal plane is 2-5°, which can be adjusted flexibly. The speed of the drum is 6-15 rpm, which can be adjusted by the inverter.

The equipment of the invention is widely used. In the production process of slow-release fertilizers or controlled-release fertilizers, different coating materials can be sprayed on the first coating area and the second coating area in turn, and the coating seal can be sprayed on the third coating area. Materials, such as liquid wax, etc.; during the production of sulfur-coated fertilizers, the fertilizer can be heated in the pre-coating area, spraying liquid sulfur in the first and second coating areas, and in the third coating Spraying oil body in the area, used to seal slow-release fertilizer, prevent fertilizer powdering and reduce sulfur dust, etc.; in the production process of chemical fertilizers, the protective liquid can be sprayed in the first coating area and/or the second coating area The protective film formed can reduce the volatilization of the fertilizer in the soil, and spray the agent in the third coating area. The invention is not only applicable to the coating of a single coating material, especially to the coating of multiple material coatings, double-layer films or even multi-layer films, and the equipment is simple, flexible and efficient.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.

detailed description

The present invention will be further described with reference to the drawings.

As shown in FIGS. 1 and 2, the present invention includes a coating drum 2, a heating jacket 3, three preparation tanks 8, three material pumps 9, three flow meters 10, a conveying pipe 7, and an atomizing nozzle 6; The feeding port 1 and the discharging port 11 are respectively designed on both ends of the coating drum 2. The coating drum is divided into a pre-coating zone, a first coating zone, a second coating zone and a In the three-coating area, the heating drum 3 is wrapped around the outer periphery of the coating drum 2, which is characterized in that different coating areas inside the coating drum are separated by a retaining ring 5 respectively, and a retaining ring 5 is also installed at both ends of the coating drum 2. Among them, two atomizing nozzles 6 are installed in each of the first to third encapsulating areas; each atomizing nozzle 6 in each encapsulating area is connected to the outlet of a material pump 9 through a conveying pipe 7, each A flow meter 10 is installed on the conveying pipeline 7, each material pump 9 is connected to a preparation tank 8, and three material pumps 9 are respectively interlocked with the external PLC through the flow meter 10 to ensure accurate liquid addition; the fertilizer is also controlled by the PLC The feed inlet 1 is added; the heating jacket 3 of the present invention is equipped with an electric heating rod, the heating rods are evenly distributed inside the jacket, and the temperature sensor is installed in the jacket. The temperature sensor is connected to an external PLC and is automatically controlled by the PLC. It can be precisely adjusted according to the actual coating needs. In the coating drum 2, six lifting plates 4 are installed in the wall of each coating area along the axial direction. As shown in FIG. 2, the lifting plates are strip angle steel, and the angle of the angle steel is 60°. The length of the pre-coating zone of the coating drum 2 accounts for 1/3 of the total length of the drum, and the lengths of the first to third coating zones are the same, that is, each takes 2/9 of the total length of the drum. The angle between the coating drum and the horizontal plane is 3°, which can be adjusted flexibly. The drum speed is 8 rpm, which can be adjusted by the inverter.

The component structures and PLC control that are not further described in the present invention are all existing and will not be described in detail.

The device of the present invention is only a specific example of the present invention, but the technical features of the present invention are not limited thereto. Any modifications, replacements and improvements made on the basis of the present invention to achieve substantially the same technical effect shall be included in the scope of protection of the present invention.

Claims

A multi-functional continuous coating equipment for fertilizers, including a coating drum, a heating jacket, N preparation tanks, N material pumps, conveying pipelines, atomizing nozzles, N is a natural number greater than 1, feed inlet, discharge The mouth is designed on the two ends of the coating drum respectively. The coating drum is divided into a pre-coating zone, a first coating zone, ... and an N-th coating zone from the feeding end to the discharging end. The heating jacket is characterized in that: a retaining ring is respectively installed between different coating areas inside the coating drum, wherein atomizing nozzles are installed in the first coating area to the Nth coating area; each coating area The atomizing nozzle inside is connected to the outlet of a material pump through a conveying pipe, and a flow meter is installed on each conveying pipe, each material pump is connected to a preparation tank, and each material pump is separately controlled by a flow meter and an external PLC .
The multifunctional continuous coating equipment for fertilizer according to claim 1, characterized in that the heating method of the heating jacket is an electric heating rod, an electric heating plate, an electric heating belt or a built-in steam heating coil, heating the jacket A temperature sensor is installed, which is connected to an external PLC.
The multifunctional continuous coating equipment for fertilizer according to claim 1, characterized in that retaining rings are also installed at both ends of the drum.
The multifunctional continuous coating equipment for fertilizer according to claim 1, wherein the number of nozzles in each coating area from the first coating area to the Nth coating area is 1-3.
The multifunctional continuous coating equipment for fertilizer according to claim 1, wherein the inner wall of the coating drum is provided with a lifting plate in the axial direction, and the lifting plate is a strip angle steel.
The multifunctional continuous coating equipment for fertilizer according to claim 5, characterized in that the angle of the strip angle steel is 45°-90°, and the number of lifting plates in each coating area is 3-9.
The multifunctional continuous coating equipment for fertilizer according to claim 1, characterized in that: the length of the pre-coating area of the coating drum accounts for 1/4-1/2 of the total length of the drum, and the first coating The length of the zone to the Nth envelope zone is the same.
The multifunctional continuous coating equipment for fertilizer according to claim 1, wherein the angle between the coating drum and the horizontal plane is 2-5°.