A multi-stage granulation compound fertilizer production line

Abstract

The utility model relates to chemical fertilizer granulation mechanical equipment technical field, concretely relates to a kind of multistage granulation compound fertilizer production line, including feeding mechanism, granulating mechanism, drying mechanism, cooling mechanism, screening mechanism and packing mechanism, the rotary drum granulator and disc granulator of granulating mechanism are in series setting, can realize the multistage granulation function of compound fertilizer, to improve granulating balling rate, reduce the rate of return, drying mechanism is connected with the first cooling machine, the output of first cooling machine is connected with the input of first screening machine, the input of feeding mechanism is connected with the first output of first screening machine, the input of second cooling machine is connected with the second output, the input of second screening machine is connected with the output of second cooling machine, the input of feeding mechanism is connected with the first output of second screening machine, by setting two-stage cooling machine and screening machine, the size qualified finished product particle can be screened out, and unqualified particle is regrinded, mixed, to improve material recycling rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of fertilizer granulation machinery and equipment, specifically relating to a multi-stage granulation compound fertilizer production line. Background Technology

[0002] Modern agriculture is intensive farming, requiring the application of various compound fertilizers. Fertilizer production technology has undergone significant changes in recent years, with low-nutrient products becoming increasingly unpopular, and high-concentration, compound nutrient fertilizers becoming the mainstream in the market. High-concentration nutrient fertilizers are typically in fine powder form, which can lead to stratification or clumping during storage and transportation. Furthermore, when applying powdered fertilizers, a considerable amount is blown away by the wind or washed away by rainwater from the plant roots, resulting in rapid fertilizer release and significant waste. To address these issues, fertilizer granulation technology has emerged and developed rapidly.

[0003] Among existing fertilizer granulation equipment, the rotary drum granulator is a large-to-medium-sized machine that can manufacture materials into specific shapes. It is one of the key pieces of equipment in the compound fertilizer industry, suitable for cold and hot granulation as well as large-scale production of high, medium, and low concentration compound fertilizers. Its main working method is wet granulation, where a certain amount of water or steam is used to moisten the base fertilizer inside the drum, allowing for a full chemical reaction. Under certain liquid phase conditions, the rotation of the drum causes the material particles to agglomerate into spheres due to pressure. The rotary drum granulator has a large processing capacity but a low sphericalization rate and a high return rate. The disc granulator, on the other hand, is a small-to-medium-sized machine. It places the powdered material inside an inclined rotating disc, continuously sprayed with a liquid binder (water or solution) to wet it. Under the action of rolling, collision, and capillary force, the fine powder continuously agglomerates and grows larger, thus forming spherical particles. The disc granulator has a small processing capacity but a high sphericalization rate and a low return rate.

[0004] Therefore, in order to fully utilize the granulation advantages of rotary drum granulators and disc granulators, it is urgent to upgrade existing compound fertilizer production lines. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes a multi-stage granulation compound fertilizer production line. By connecting a rotary drum granulator and a disc granulator in series, it can achieve multi-stage granulation of compound fertilizer, thereby improving the granulation and pelletizing rate, reducing the return rate, and improving the material utilization rate.

[0006] To solve the above-mentioned technical problems, this utility model provides a multi-stage granulation compound fertilizer production line, comprising:

[0007] The feeding mechanism is used to crush and mix materials;

[0008] The granulation mechanism includes a rotary drum granulator and a disc granulator. The input end of the rotary drum granulator is connected to the output end of the feeding mechanism, and the output end of the rotary drum granulator is connected to the input end of the disc granulator.

[0009] The drying mechanism is configured such that the output end of the disc granulator is connected to the input end of the drying mechanism.

[0010] The cooling mechanism includes a first cooler and a second cooler, and the output end of the drying mechanism is connected to the input end of the first cooler;

[0011] The screening mechanism includes a first screening machine and a second screening machine. The output end of the first cooler is connected to the input end of the first screening machine. The first output end of the first screening machine is connected to the input end of the feeding mechanism. The second output end of the first screening machine is connected to the input end of the second cooler. The output end of the second cooler is connected to the input end of the second screening machine. The first output end of the second screening machine is connected to the input end of the feeding mechanism.

[0012] The packaging mechanism is connected to the second output end of the second screening machine and is used to package the screened particles.

[0013] Preferably, in the above scheme, the feeding mechanism includes a crusher, and the first output end of the first screening machine and the first output end of the second screening machine are respectively connected to the input end of the crusher.

[0014] Preferably, in the above scheme, the feeding mechanism further includes a mixer, the output end of the crusher is connected to the input end of the mixer, and the output end of the mixer is connected to the input end of the rotary drum granulator.

[0015] Preferably, in the above scheme, the drying mechanism includes a dryer, the output end of the disc granulator is connected to the input end of the dryer, and the output end of the dryer is connected to the input end of the first cooler.

[0016] Preferably, in the above scheme, the granulation mechanism further includes a distribution plate, the output end of the rotary drum granulator is connected to the input ends of multiple disc granulators through the distribution plate, and the output ends of the multiple disc granulators are connected to the input end of the dryer.

[0017] Preferably, in the above scheme, the drying mechanism further includes a hot air furnace, which delivers hot air into the dryer through a ventilation pipe.

[0018] Preferably, the above solution also includes a dust collector, and the dryer delivers internal gas to the dust collector through a ventilation pipe.

[0019] Preferably, in the above scheme, the packaging mechanism includes a finished product metering belt, and the input end of the finished product metering belt is connected to the second output end of the second screening machine.

[0020] Preferably, in the above scheme, the packaging mechanism further includes a wrapping machine, and the output end of the finished product metering tape is connected to the input end of the wrapping machine.

[0021] Preferably, in the above scheme, both the first screening machine and the second screening machine are configured as drum screens.

[0022] Compared with existing technologies, this utility model has the following beneficial effects:

[0023] 1. This utility model discloses a multi-stage granulation compound fertilizer production line. The output end of a rotary drum granulator is connected to the input end of a disc granulator, and the output end of the disc granulator is connected to the input end of a drying mechanism. The rotary drum granulator and disc granulator are connected in series to achieve multi-stage granulation of compound fertilizer, thereby improving the granulation pelleting rate and reducing the return rate. The cooling mechanism includes a first cooler and a second cooler. The output end of the drying mechanism is connected to the input end of the first cooler. The screening mechanism includes a first screening machine and a second screening machine. The output end of the first cooler is connected to the input end of the first screening machine. The first output end of the first screening machine is connected to the input end of the feeding mechanism, the second output end of the first screening machine is connected to the input end of the second cooler, the output end of the second cooler is connected to the input end of the second screening machine, and the first output end of the second screening machine is connected to the input end of the feeding mechanism. By setting up two stages of coolers and screening machines, qualified finished granules can be fully screened out, and unqualified granules can be transported to the feeding mechanism for re-crushing and mixing, thereby improving the material recycling rate.

[0024] 2. The drying mechanism in this utility model includes a dryer and a hot air furnace. The hot air furnace delivers hot air into the dryer through a ventilation pipe for drying the finished particles. The dryer delivers the internal gas to a dust collector through a ventilation pipe, which can remove dust from the exhaust gas generated during the drying process of the finished particles and avoid causing air pollution.

[0025] 3. In this utility model, the output end of the rotary drum granulator is connected to the input ends of multiple disc granulators through a distribution plate. The distribution plate is used to evenly distribute the semi-finished granules and materials output by the rotary drum granulator into each disc granulator, which can improve the efficiency of disc granulation and reduce the impact of single-point failure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the planar layout structure of a multi-stage granulation compound fertilizer production line according to the present invention.

[0027] Figure 2This is a schematic diagram of a multi-stage granulation compound fertilizer production line according to the present invention.

[0028] Among them, 1-feeding mechanism, 11-crusher, 12-mixer, 2-granulation mechanism, 21-rotary drum granulator, 22-disc granulator, 23-distribution plate, 3-drying mechanism, 31-dryer, 32-hot air furnace, 4-cooling mechanism, 41-first cooler, 42-second cooler, 5-screening mechanism, 51-first screener, 52-second screener, 6-packing mechanism, 61-finished product metering belt, 62-wrapping machine, 7-palletizer. Detailed Implementation

[0029] 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.

[0030] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0033] like Figure 1 and Figure 2 As shown, this utility model discloses a multi-stage granulation compound fertilizer production line, including a feeding mechanism 1, a granulation mechanism 2, a drying mechanism 3, a cooling mechanism 4, a screening mechanism 5, and a packaging mechanism 6. The feeding mechanism 1 is used to crush and mix materials. The granulation mechanism 2 includes a rotary drum granulator 21 and a disc granulator 22. The input end of the rotary drum granulator 21 is connected to the output end of the feeding mechanism 1, and the output end of the rotary drum granulator 21 is connected to the input end of the disc granulator 22. The output end of the disc granulator 22 is connected to the input end of the drying mechanism 3. The cooling mechanism 4 includes a first cooler 41 and a second cooler 42. The drying mechanism 3... The output end is connected to the input end of the first cooler 41. The screening mechanism 5 includes a first screening machine 51 and a second screening machine 52. The output end of the first cooler 41 is connected to the input end of the first screening machine 51. The first output end of the first screening machine 51 is connected to the input end of the feeding mechanism 1. The second output end of the first screening machine 51 is connected to the input end of the second cooler 42. The output end of the second cooler 42 is connected to the input end of the second screening machine 52. The first output end of the second screening machine 52 is connected to the input end of the feeding mechanism 1. The packaging mechanism 6 is connected to the second output end of the second screening machine 52 and is used to package the screened particles.

[0034] This embodiment achieves multi-stage granulation of compound fertilizer by setting the rotary drum granulator 21 and the disc granulator 22 in series, thereby improving the granulation pelleting rate and reducing the return rate. By setting two-stage coolers and screening machines, qualified finished granules can be fully screened out, and unqualified granules can be transported to the feeding mechanism 1 for re-crushing and mixing, so as to improve the material recycling rate.

[0035] Specifically, the feeding mechanism 1 includes a crusher 11, with the first output end of the first screening machine 51 and the first output end of the second screening machine 52 connected to the input end of the crusher 11. Preferably, both the first screening machine 51 and the second screening machine 52 are configured as drum screens. The second output end of the drum screen is used to screen out particles of acceptable size, and the first output end of the drum screen is used to screen out unacceptable particles, which are then conveyed to the crusher 11 for re-crushing. Further, the feeding mechanism 1 also includes a mixer 12, with the output end of the crusher 11 connected to the input end of the mixer 12, and the output end of the mixer 12 connected to the input end of the rotary drum granulator 21, for mixing and conveying the crushed material into the rotary drum granulator 21.

[0036] The drying mechanism 3 in this embodiment includes a dryer 31. The output end of the disc granulator 22 is connected to the input end of the dryer 31, and the output end of the dryer 31 is connected to the input end of the first cooler 41. It is worth noting that the granulation mechanism 2 also includes a distribution plate 23. The output end of the drum granulator 21 is connected to the input ends of multiple disc granulators 22 via the distribution plate 23. The distribution plate 23 is configured as a single-inlet, multi-outlet inclined guide plate structure, used to evenly distribute the semi-finished granules and materials output from the drum granulator 21 into each disc granulator 22. This saves the process of adding materials twice to the disc granulators 22, improves the efficiency of disc granulation, reduces the impact of single-point failures, and reduces the dust removal burden in the subsequent drying stage. The output ends of the multiple disc granulators 22 are respectively connected to the input end of the dryer 31.

[0037] Specifically, the drying mechanism 3 also includes a hot air furnace 32, which supplies hot air into the dryer 31 through a ventilation duct for drying the finished granules. This embodiment also includes a dust collector, which supplies internal gas to the dryer 31 through a ventilation duct, thereby removing dust from the exhaust gas generated during the drying process of the finished granules and preventing air pollution.

[0038] The packaging mechanism 6 in this embodiment includes a finished product metering belt 61, the input end of which is connected to the second output end of the second screening machine 52, enabling the weighing of qualified finished product granules. Specifically, the packaging mechanism 6 also includes a coating machine 62, the output end of which is connected to the input end of the coating machine 62. The coating machine 62 coats the finished product granules with a film to prevent moisture absorption or clumping, thus extending shelf life. Additionally, the output end of the packaging mechanism 6 is equipped with a palletizer 7, which can automatically stack the packaged compound fertilizer, reducing labor intensity. It should be understood that this embodiment also includes a conveyor belt and a bucket elevator for horizontal and vertical conveying of materials and granules.

[0039] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A multi-stage granulation compound fertilizer production line, characterized in that, include: The feeding mechanism is used to crush and mix materials; The granulation mechanism includes a rotary drum granulator and a disc granulator. The input end of the rotary drum granulator is connected to the output end of the feeding mechanism, and the output end of the rotary drum granulator is connected to the input end of the disc granulator. The drying mechanism is configured such that the output end of the disc granulator is connected to the input end of the drying mechanism. The cooling mechanism includes a first cooler and a second cooler, and the output end of the drying mechanism is connected to the input end of the first cooler; The screening mechanism includes a first screening machine and a second screening machine. The output end of the first cooler is connected to the input end of the first screening machine. The first output end of the first screening machine is connected to the input end of the feeding mechanism. The second output end of the first screening machine is connected to the input end of the second cooler. The output end of the second cooler is connected to the input end of the second screening machine. The first output end of the second screening machine is connected to the input end of the feeding mechanism. The packaging mechanism is connected to the second output end of the second screening machine and is used to package the screened particles.

2. The multi-stage granulation compound fertilizer production line according to claim 1, characterized in that, The feeding mechanism includes a crusher, and the first output end of the first screening machine and the first output end of the second screening machine are respectively connected to the input end of the crusher.

3. The multi-stage granulation compound fertilizer production line according to claim 2, characterized in that, The feeding mechanism also includes a mixer, the output end of the crusher is connected to the input end of the mixer, and the output end of the mixer is connected to the input end of the rotary drum granulator.

4. The multi-stage granulation compound fertilizer production line according to claim 1, characterized in that, The drying mechanism includes a dryer, the output end of the disc granulator is connected to the input end of the dryer, and the output end of the dryer is connected to the input end of the first cooler.

5. The multi-stage granulation compound fertilizer production line according to claim 4, characterized in that, The granulation mechanism also includes a distribution plate. The output end of the rotary drum granulator is connected to the input ends of multiple disc granulators through the distribution plate. The output ends of the multiple disc granulators are connected to the input end of the dryer.

6. The multi-stage granulation compound fertilizer production line according to claim 4, characterized in that, The drying mechanism also includes a hot air furnace, which delivers hot air into the dryer through a ventilation pipe.

7. The multi-stage granulation compound fertilizer production line according to claim 6, characterized in that, It also includes a dust collector, to which the dryer delivers internal gas via a ventilation duct.

8. The multi-stage granulation compound fertilizer production line according to claim 1, characterized in that, The packaging mechanism includes a finished product metering belt, the input end of which is connected to the second output end of the second screening machine.

9. A multi-stage granulation compound fertilizer production line according to claim 8, characterized in that, The packaging mechanism also includes a wrapping machine, and the output end of the finished product metering tape is connected to the input end of the wrapping machine.

10. A multi-stage granulation compound fertilizer production line according to claim 1, characterized in that, Both the first screening machine and the second screening machine are configured as drum screens.

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