Granulation nozzle for granulation section of compound fertilizer production

Abstract

The utility model provides a granulation nozzle for a compound fertilizer production granulation section, which comprises a granulation nozzle upper section and a granulation nozzle lower section, one end of the granulation nozzle upper section is fixedly connected with a granulation nozzle mounting head, and the front end of the granulation nozzle lower section is connected with a granulation nozzle replacement spray pipe. A plurality of air guide-in mixing long through holes and air guide-in mixing short through holes are formed in the granulation spray head upper section; a plurality of sections of different structures are combined, and a larger granulation cavity is formed in the spray head, so that molten slurry is completely mixed with air, then particles are guided into spray holes through a particle guide plate, the slurry is partially cooled through a collision throttle pipe, sprayed slurry particles can be quickly cooled after being flushed out of the spray head, and the granulation efficiency is improved. Finally prepared compound fertilizer particles can meet the requirements, so that the granulation efficiency of the granulation spray head is remarkably improved, the forming rate of slurry sprayed out of the spray head is greatly improved, deformation of slurry particles is effectively avoided, and the granulation economic benefit is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compound fertilizer granulation equipment, and specifically relates to a granulation nozzle for the granulation section of compound fertilizer production. Background Art

[0002] Granulators play a crucial role in the pharmaceutical industry and the chemical industry. The spiral granulation nozzle is a structure used in conjunction with the granulator. They are widely used to convert powdery materials into granular form for subsequent packaging, transportation, and use. This technology can meet the requirements for preparing high-quality and uniform granules, as well as the strict requirements for process control and finished product quality.

[0003] In the past, granulation was usually carried out by wet granulation, that is, mixing powder with liquid and forming granules through steps such as spray drying. However, this method has some disadvantages, such as complex process, high energy consumption, long production cycle, etc. Therefore, with the development of science and technology and the continuous improvement of industrial demands, especially in the chemical industry, granulators have gradually become a more efficient, controllable, and energy-saving granulation method.

[0004] The supporting granulator usually includes components such as a raw material melting part, an extrusion part, a solidification part, a granule formation part, and a control system. The spiral granulation nozzle is a key component of this technology. Its principle is to melt solid raw materials into a liquid state through a high-temperature melting cavity, and then transport the molten raw materials to the nozzle through a spiral propeller. At the same time, through control parameters such as pressure and air flow, the molten raw materials are ejected from the extrusion nozzle in the form of long strips. The long strip raw materials are cooled and solidified, and finally transported to the cutting part and cut into uniformly sized granules. This method has the advantages of simple operation, high production efficiency, adjustable granule size, and stable product quality, thus meeting the requirements of different products, and has therefore received wide attention and application.

[0005] Currently, the prior art usually introduces long strip raw materials into water for cooling and solidification to facilitate subsequent cutting and granulation. However, after solidification by water cooling, moisture will remain on the surface of the long strip raw materials, which is likely to mix with the manufactured granules, thus easily affecting the product quality. Therefore, it does not meet the existing requirements, and for this reason, we propose a granulation nozzle for the granulation section of compound fertilizer production. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a granulating nozzle for the granulating section of compound fertilizer production. The granulating nozzle is combined by multiple different structures, and a relatively large granulating cavity is formed inside the nozzle, so that the molten slurry is fully mixed with air and then guided into the spray holes through the particle guiding plate. Then, the slurry is partially cooled through the collision throttling pipe, so that the ejected slurry particles can be quickly cooled after rushing out of the nozzle, so that the finally prepared compound fertilizer particles can meet the requirements, thereby significantly improving the granulation efficiency of the granulating nozzle, greatly improving the forming rate of the slurry ejected by the nozzle, effectively avoiding the deformation of the slurry particles, and significantly improving the granulation economic benefits.

[0007] To achieve the purpose of the present utility model, the technical solution adopted is:

[0008] A granulating nozzle for the granulating section of compound fertilizer production, including an upper section of the granulating nozzle and a lower section of the granulating nozzle. One end of the upper section of the granulating nozzle is fixedly connected with a granulating nozzle mounting head, and the front end of the lower section of the granulating nozzle is installed and connected with a granulating nozzle replacement nozzle; a plurality of air inlet and mixing long through holes and air inlet and mixing short through holes are opened on the upper section of the granulating nozzle, and a plurality of side granulating spray holes, inclined granulating spray holes and straight granulating spray holes are opened on the lower section of the granulating nozzle; a granulating mixing cavity is arranged inside the granulating nozzle composed of the upper section of the granulating nozzle and the lower section of the granulating nozzle, and a granulating nozzle particle guiding plate is filled and arranged inside the granulating mixing cavity.

[0009] Preferably, an installation head engaging thread is arranged at the connection between the granulating nozzle mounting head and the upper section of the granulating nozzle, and the granulating nozzle mounting head is movably engaged with the upper section of the granulating nozzle through the installation head engaging thread.

[0010] Preferably, the other end of the granulating nozzle mounting head is also provided with an installation head fixing thread, and the granulating nozzle mounting head is movably engaged with the granulating nozzle mounting seat through the installation head fixing thread.

[0011] Preferably, an air duct installation thread is arranged at the front end of the air inlet and mixing long through hole and the air inlet and mixing short through hole, and the air inlet and mixing long through hole and the air inlet and mixing short through hole are movably engaged with the air duct through the air duct installation thread.

[0012] Preferably, a granulating expansion throttling pipe is installed inside each of the side granulating spray hole, the inclined granulating spray hole and the straight granulating spray hole, and the granulating expansion throttling pipe is set to be unidirectional conduction.

[0013] Preferably, a molten slurry through channel is arranged between the upper section of the granulating nozzle and the granulating nozzle mounting head, and the molten slurry through channel runs through and connects the granulating nozzle mounting head with the granulating mixing cavity composed of the upper section of the granulating nozzle and the lower section of the granulating nozzle inside.

[0014] Preferably, the intersection center of the long air inlet mixing through holes, the short air inlet mixing through holes, the side granulation spray holes, the inclined granulation spray holes, the straight granulation spray holes and the molten slurry through channels coincides with the center of the circle of the granulation mixing cavity.

[0015] Preferably, the granulation spray head is composed of an upper section of the granulation spray head, a lower section of the granulation spray head and a replaceable spray pipe of the granulation spray head, and the outer shape of the granulation spray head is an integral conical head shape, an integral square conical head shape, a front conical and rear square conical shape or a rear conical and front square conical shape.

[0016] The granulation spray head for the granulation section of compound fertilizer production provided by the present utility model has the following advantages:

[0017] In the present utility model, the granulation spray head is combined by multiple different structures, and a large granulation cavity is formed inside the spray head, so that the molten slurry and air are fully mixed and then guided into the spray holes through the particle guiding plate, and then the slurry is partially cooled through the collision throttling pipe, so that the ejected slurry particles can be quickly cooled after rushing out of the spray head, so that the compound fertilizer particles finally prepared can meet the requirements, thereby significantly improving the granulation efficiency of the granulation spray head, greatly improving the forming rate of the slurry ejected by the spray head, effectively avoiding the deformation of the slurry particles, and significantly improving the granulation economic benefits. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the granulation spray head for the granulation section of compound fertilizer production of the present utility model Figure 1 ;

[0019] Figure 2 It is a schematic diagram of the overall structure of the granulation spray head for the granulation section of compound fertilizer production of the present utility model Figure 2 ;

[0020] Figure 3 It is a schematic diagram of the overall structure of the granulation spray head for the granulation section of compound fertilizer production of the present utility model Figure 3 ;

[0021] In the figure: 1. Upper section of the granulation spray head; 2. Lower section of the granulation spray head; 3. Replaceable spray pipe of the granulation spray head; 4. Installation head of the granulation spray head; 5. Long air inlet mixing through hole; 6. Short air inlet mixing through hole; 7. Side granulation spray hole; 8. Inclined granulation spray hole; 9. Straight granulation spray hole; 10. Granulation expansion throttling pipe; 11. Fixed thread of the installation head; 12. Molten slurry through channel; 13. Particle guiding plate of the granulation spray head; 14. Granulation mixing cavity. Detailed Embodiments

[0022] The following further elaborates and explains the present utility model in combination with specific embodiments and the attached drawings of the specification.

[0023] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] Embodiment 1

[0026] As Figure 1 shown, a granulation nozzle for the granulation section of compound fertilizer production includes an upper granulation nozzle section 1 and a lower granulation nozzle section 2. One end of the upper granulation nozzle section 1 is fixedly connected with a granulation nozzle mounting head 4, and the front end of the lower granulation nozzle section 2 is installed and connected with a granulation nozzle replacement nozzle 3. A number of air inlet mixing long through holes 5 and air inlet mixing short through holes 6 are provided on the upper granulation nozzle section 1. An installation head engagement thread is provided at the connection between the granulation nozzle mounting head 4 and the upper granulation nozzle section 1, and the granulation nozzle mounting head 4 is movably engaged with the upper granulation nozzle section 1 through the installation head engagement thread.

[0027] As Figure 2 、 3 shown, a granulation nozzle for the granulation section of compound fertilizer production. A number of side granulation spray holes 7, inclined granulation spray holes 8 and straight granulation spray holes 9 are provided on the lower granulation nozzle section 2. The other end of the granulation nozzle mounting head 4 is also provided with an installation head fixing thread 11, and the granulation nozzle mounting head 4 is movably engaged with the granulation nozzle mounting seat through the installation head fixing thread 11. A granulation mixing cavity 14 is provided inside the granulation nozzle composed of the upper granulation nozzle section 1 and the lower granulation nozzle section 2, and a granulation nozzle particle guide plate 13 is filled inside the granulation mixing cavity 14. Air duct installation threads are provided at the front ends of the air inlet mixing long through holes 5 and the air inlet mixing short through holes 6, and the air inlet mixing long through holes 5 and the air inlet mixing short through holes 6 are movably engaged with the air duct through the air duct installation threads.

[0028] As Figure 1 、 2, as shown in Figures 3, a granulation nozzle for the granulation section of compound fertilizer production. Granulation expansion throttle tubes 10 are installed inside the side granulation spray holes 7, inclined granulation spray holes 8, and straight granulation spray holes 9. The granulation expansion throttle tubes 10 are set to conduct unidirectionally. There is a molten slurry through-channel 12 between the upper section 1 of the granulation nozzle and the granulation nozzle mounting head 4. The molten slurry through-channel 12 runs through and connects the granulation nozzle mounting head 4 with the granulation mixing cavity 14 formed by the upper section 1 of the granulation nozzle and the lower section 2 of the granulation nozzle inside. The intersection center of the air inlet mixing long through-hole 5, the air inlet mixing short through-hole 6, the side granulation spray holes 7, the inclined granulation spray holes 8, the straight granulation spray holes 9, and the molten slurry through-channel 12 coincides with the circle of the granulation mixing cavity 14.

[0029] Furthermore, the outer shape of the granulation nozzle composed of the upper section 1 of the granulation nozzle, the lower section 2 of the granulation nozzle, and the granulation nozzle replacement pipe 3 is an overall conical head shape or an overall square conical head shape or a front conical and rear square conical shape or a rear conical and front square conical shape structure.

[0030] During operation, the granulation nozzle mounting head 4 is movably engaged and connected to the granulation nozzle mounting seat through the mounting head fixing thread 11 to achieve the installation and fixation of the overall granulation nozzle. The air duct is installed and fixed in the air inlet mixing long through-hole 5 and the air inlet mixing short through-hole 6 of the upper section 1 of the granulation nozzle through the air duct installation thread, and the lower section 2 of the granulation nozzle and the granulation nozzle replacement pipe 3 are hermetically combined through the engagement thread;

[0031] First, the granulation expansion throttle tubes 10 are completely installed and inlaid into the side granulation spray holes 7, the inclined granulation spray holes 8, and the straight granulation spray holes 9. The granulation nozzle particle guiding plate 13 is placed in the granulation mixing cavity 14 formed by the upper section 1 of the granulation nozzle and the lower section 2 of the granulation nozzle. The granulation nozzle particle guiding plate 13 is aligned with the side granulation spray holes 7, the inclined granulation spray holes 8, and the straight granulation spray holes 9 on the lower section 2 of the granulation nozzle. The upper section 1 of the granulation nozzle and the lower section 2 of the granulation nozzle are combined through the engagement thread to form the granulation mixing cavity 14;

[0032] When the molten compound fertilizer slurry enters the granulation mixing cavity 14 from the granulation nozzle mounting head 4 through the molten slurry through-channel 12, at this time, air or other gases also enter the granulation mixing cavity 14 through the air inlet mixing long through-hole 5 and the air inlet mixing short through-hole 6 simultaneously, causing the granulation mixing cavity 14 to form a high pressure and mix with the molten compound fertilizer slurry, and extruding the molten compound fertilizer slurry from the side granulation spray holes 7, the inclined granulation spray holes 8 and the straight granulation spray holes 9. When the molten compound fertilizer slurry passes through the granulation expansion throttle tube 10 in the side granulation spray holes 7, the inclined granulation spray holes 8 and the straight granulation spray holes 9, due to the large pressure difference on both sides of the granulation expansion throttle tube 10 and its aperture being smaller than that of the side granulation spray holes 7, the inclined granulation spray holes 8 and the straight granulation spray holes 9, the slurry passing through the granulation expansion throttle tube 10 will reduce in temperature, so that it can quickly form particles and cool and solidify when sprayed out from the granulation nozzle, realizing slurry granulation;

[0033] By unscrewing the granulation nozzle replacement nozzle 3 from the lower section 2 of the granulation nozzle and using other suitable granulation nozzles to replace the nozzle 3, the replacement of the nozzle type directly connected to the straight granulation spray hole 9 is realized.

[0034] Embodiment 2

[0035] The difference between this embodiment and Embodiment 1 lies in:

[0036] For a granulation nozzle in the granulation section of compound fertilizer production, the granulation mixing cavity 14 formed by the upper section 1 of the granulation nozzle and the lower section 2 of the granulation nozzle is cancelled. The air inlet mixing long through-hole 5 and the air inlet mixing short through-hole 6 are simultaneously merged into the molten slurry through-channel 12 to directly mix with the molten slurry, and then directly enter the side granulation spray holes 7, the inclined granulation spray holes 8 and the straight granulation spray holes 9, pass through the granulation expansion throttle tube 10 therein, and then are directly sprayed out from the side granulation spray holes 7, the inclined granulation spray holes 8 and the straight granulation spray holes 9 respectively to realize granulation.

[0037] In the present utility model, the granulation nozzle is combined by multiple different structures, and a large granulation cavity is formed inside the nozzle, so that the molten slurry and air are fully mixed and then guided into the spray holes through the particle guiding plate, and then the slurry is partially cooled through the collision throttle tube, so that the slurry particles ejected can be quickly cooled after rushing out of the nozzle, so that the finally prepared compound fertilizer particles can meet the requirements, thereby significantly improving the granulation efficiency of the granulation nozzle, greatly increasing the forming rate of the slurry ejected by the nozzle, effectively avoiding the deformation of the slurry particles, and significantly improving the granulation economic benefits.

[0038] The above has introduced in detail the technical solutions disclosed in the embodiments of the present utility model. In this text, specific embodiments are used to elaborate on the principles and implementation manners of the embodiments of the present utility model. The description of the above embodiments is only applicable to helping understand the principles of the embodiments of the present utility model; at the same time, for those of ordinary skill in the art, according to the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present utility model.

Claims

1. A granulation nozzle for the granulation section of compound fertilizer production, characterized in that, It includes the upper section (1) of the granulating nozzle and the lower section (2) of the granulating nozzle. One end of the upper section (1) of the granulating nozzle is fixedly connected with the granulating nozzle mounting head (4), and the front end of the lower section (2) of the granulating nozzle is installed and connected with the granulating nozzle replacement nozzle (3). A number of air inlet and mixing long through holes (5) and air inlet and mixing short through holes (6) are provided on the upper section (1) of the granulating nozzle, and a number of side granulating nozzles (7), inclined granulating nozzles (8) and straight granulating nozzles (9) are provided on the lower section (2) of the granulating nozzle. A granulating mixing cavity (14) is arranged inside the granulating nozzle composed of the upper section (1) of the granulating nozzle and the lower section (2) of the granulating nozzle, and a granulating nozzle particle guide plate (13) is filled and arranged inside the granulating mixing cavity (14).

2. The granulation nozzle in the granulation section of the compound fertilizer production according to claim 1, characterized in that, A mounting head engaging thread is arranged at the connection between the granulating nozzle mounting head (4) and the upper section (1) of the granulating nozzle, and the granulating nozzle mounting head (4) is movably engaged with the upper section (1) of the granulating nozzle through the mounting head engaging thread.

3. The granulation nozzle for the granulation section of the compound fertilizer production according to claim 2, characterized in that, The other end of the granulating nozzle mounting head (4) is also provided with a mounting head fixing thread (11), and the granulating nozzle mounting head (4) is movably engaged with the granulating nozzle mounting seat through the mounting head fixing thread (11).

4. The granulation nozzle of the granulation section for compound fertilizer production according to claim 1, characterized in that, Air duct mounting threads are arranged at the front ends of the air inlet and mixing long through holes (5) and the air inlet and mixing short through holes (6), and the air inlet and mixing long through holes (5) and the air inlet and mixing short through holes (6) are movably engaged with the air duct through the air duct mounting threads.

5. The granulation nozzle of the compound fertilizer production granulation section according to claim 1, characterized in that, Granulating expansion throttle tubes (10) are installed inside the side granulating nozzles (7), inclined granulating nozzles (8) and straight granulating nozzles (9), and the granulating expansion throttle tubes (10) are set to be unidirectionally conductive.

6. The granulation nozzle of the granulation section in the production of compound fertilizers according to claim 1, characterized in that, A molten slurry through channel (12) is arranged between the upper section (1) of the granulating nozzle and the granulating nozzle mounting head (4), and the molten slurry through channel (12) runs through and connects the granulating nozzle mounting head (4) with the granulating mixing cavity (14) composed of the upper section (1) of the granulating nozzle and the lower section (2) of the granulating nozzle inside.

7. The granulation nozzle in the granulation section of the compound fertilizer production according to claim 1, characterized in that, The intersection centers of the air inlet and mixing long through holes (5) and the air inlet and mixing short through holes (6), the side granulating nozzles (7), the inclined granulating nozzles (8) and the straight granulating nozzles (9), and the molten slurry through channel (12) coincide with the circle of the granulating mixing cavity (14).

8. The granulation nozzle in the granulation section of the compound fertilizer production, according to any one of claims 1-7, is characterized in that, The outer shape of the granulating nozzle composed of the upper section (1) of the granulating nozzle, the lower section (2) of the granulating nozzle and the granulating nozzle replacement nozzle (3) is an overall conical head shape or an overall square conical head shape or a front conical and rear square conical shape or a rear conical and front square conical shape structure.

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