A spray drying granulation device for EDDHA-FeNa

Abstract

The utility model discloses a kind of for EDDHA-FeNa's spray drying granulating device, belong to granulating device technical field. Including drying tower and feed pump, the outside of drying tower is provided with feed pump, feed pipe is installed on the outer wall of the feed pump, the bottom end of drying tower is installed with hopper, the outer wall of hopper is symmetrically installed with pneumatic percussion hammer. The utility model not only realizes that granulating device is conveniently for EDDHA-FeNa chelate solution is conveniently granulated, it is convenient to adjust the spray angle of EDDHA-FeNa chelate solution, increase the spray range of granulating device, improve the efficiency of granulating device, improve atomization effect, and increase spraying A-FeNa product convenient secondary granulation reduces loss amount, improve the yield of spray granulation.

Description

Technical Field

[0001] This utility model relates to the technical field of spray drying granulation equipment, and in particular to a spray drying granulation equipment for EDDHA-FeNa. Background Technology

[0002] EDDHA-FeNa, chemically known as sodium ethylenediamine di-o-hydroxyphenyl ferric acetate, is a powerful amino acid chelating agent widely used in industries such as power generation, papermaking, wastewater treatment, and agricultural production. It has a wide pH range and is easily absorbed by plants, making it an effective chelated micronutrient fertilizer. In China, it is mainly used to prevent chlorosis caused by iron deficiency in plants, and can also be used to supplement iron in normal plants, improving fruit yield and quality. EDDHA-FeNa can be rapidly absorbed by plants, improving soil compaction and fertility decline caused by long-term application of ordinary chemical fertilizers, and is widely used in agricultural production.

[0003] For example, the spray drying granulation device disclosed in the authorization announcement number CN221999797U combines the principles of spray drying and cyclone separator.

[0004] While achieving granulation, it can also separate particles of different sizes, with excessively small particles being discharged separately for collection and reuse; the grading standard can be adjusted by regulating the airflow speed of the inlet pipe; and the relatively regular swirling flow field can solve the discharge blockage problem of existing spray drying towers. By moving the lever, the atomized particle size can be adjusted, and in conjunction with the airflow speed regulation of the inlet pipe, the discharge particle size can be precisely adjusted and controlled.

[0005] However, this does not solve the problem that existing granulation devices of this type are generally not conducive to convenient granulation of EDDHA-FeNa chelate solutions, are not easy to adjust the spray angle of EDDHA-FeNa chelate solutions, which affects the spray range of the granulation device and the efficiency of the granulation device. It is also not convenient to re-granulate the sprayed A-FeNa products to reduce losses, thus affecting the output of spray granulation. Utility Model Content

[0006] The purpose of this invention is to provide a spray drying granulation device for EDDHA-FeNa, in order to solve the problems mentioned in the background art, such as the inconvenience of the granulation device in facilitating convenient granulation of EDDHA-FeNa chelate, the inconvenience of adjusting the spray angle of the EDDHA-FeNa chelate, which affects the spray range and efficiency of the granulation device, and the inconvenience of convenient re-granulation of A-FeNa products to reduce losses, thus affecting the output of spray granulation.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A spray drying granulation apparatus for EDDHA-FeNa includes a drying tower and a feed pump. The feed pump is located outside the drying tower, and a feed pipe is installed on the outer wall of the feed pump. A hopper is installed at the bottom of the drying tower, and pneumatic vibrating hammers are symmetrically installed on the outer wall of the hopper. A feeding pump is installed on the outer wall of the hopper on one side of the pneumatic vibrating hammers, and a second pipe is installed at the bottom of the feeding pump. A feed pipe is installed at the bottom of the hopper. An external fluidized bed is located outside the hopper below the feed pipe, and the feed pipe extends into the interior of the external fluidized bed. A feed pipe is installed on the outer wall of the feeding pump on one side of the pneumatic vibrating hammers. A cyclone separator is located outside the external fluidized bed on one side of the feed pipe, with one end of the feed pipe extending into the interior of the feeding pump and the other end extending into the interior of the cyclone separator. A return system is installed at the bottom of the cyclone separator.

[0008] Optionally, a discharge pipe is installed at the top of the cyclone separator, a bag filter is installed outside the cyclone separator on one side of the discharge pipe, and one end of the discharge pipe extends into the interior of the cyclone separator, and the other end of the discharge pipe extends into the interior of the bag filter.

[0009] Optionally, a front return pipe is installed at the bottom of the bag filter, with one end of the front return pipe extending into the interior of the bag filter and the other end extending into the interior of the return system. A rear return pipe is installed on the outer wall of the return system on the side away from the front return pipe, with one end of the rear return pipe extending into the interior of the return system and the other end extending into the interior of the drying tower.

[0010] Optionally, the outer wall of the drying tower is symmetrically equipped with insulation plates, the top of the drying tower is equipped with a pressure relief valve, a lifting cylinder is installed on the top of the drying tower on one side of the pressure relief valve, a lifting push rod is installed at the output end of the lifting cylinder, and the lifting push rod extends into the interior of the drying tower. A double-acting cylinder is installed at the end of the lifting push rod away from the lifting cylinder, and a support arm is installed at the output end of each double-acting cylinder.

[0011] Optionally, hollow tilting arms are movably installed on the outer wall of each support arm, and multiple sets of spray guns with equal spacing are installed on the outer wall of each hollow tilting arm. Limiting sleeves are symmetrically installed on the top of the drying tower on one side of the lifting cylinder.

[0012] Optionally, each of the limiting sleeves has a limiting rod slidably installed inside, and the limiting rod extends into the interior of the drying tower, and the limiting rod is connected to a bidirectional cylinder.

[0013] Optionally, atomizing tubes are symmetrically installed on the outer wall of the feeding pipe near the lifting cylinder, and the atomizing tubes extend into the interior of the hollow tilting arm.

[0014] Optionally, each of the support arms has a flipping shaft installed on the outer wall near the hollow flipping arm, and the support arm is movably connected to the hollow flipping arm via the flipping shaft.

[0015] Optionally, a support block is installed at the bottom of each support arm, and a tilting cylinder is movably installed at the bottom of each support block.

[0016] Optionally, each of the tilting cylinders is equipped with a drive shaft at its output end, and a drive block is fitted onto the surface of each drive shaft, with the drive block connected to the hollow tilting arm.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the granulation device not only realizes the convenient granulation of EDDHA-FeNa chelate liquid, facilitates the adjustment of the spray angle of EDDHA-FeNa chelate liquid, increases the spray range of the granulation device, improves the efficiency of the granulation device, and improves the atomization effect, but also increases the convenient re-granulation of sprayed A-FeNa products to reduce losses and increase the output of spray granulation.

[0018] The feed pump is turned on, and it delivers the external EDDHA-FeNa chelate solution through the feed pipe to the inner atomizing pipes of the two sets of atomizing tubes. The atomizing tubes then deliver the EDDHA-FeNa chelate solution into the hollow rotating arm. The spray gun is turned on to evenly spray the EDDHA-FeNa chelate solution, which falls onto the surface of the external fluidized bed through the hopper and feed pipe, facilitating the formation of powder from the EDDHA-FeNa chelate solution. At the same time, the pressure relief valve is opened to prevent overpressure operation inside the drying tower. The feed pump draws the EDDHA-FeNa powder from the surface of the external fluidized bed into the feed pipe through the second pipe. The EDDHA-FeNa powder is then delivered to the cyclone separator, where it is separated into granular EDDHA-FeNa. The non-granulated EDDHA-FeNa product is conveyed through the discharge pipe to the inside of the bag filter. The bag filter collects the non-granulated EDDHA-FeNa and conveys it to the inside of the return system through the front return pipe. Under the action of the return system, the non-granulated EDDHA-FeNa is conveyed to the inside of the drying tower through the rear return pipe for re-granulation, reducing the loss of EDDHA-FeNa. This granulation device can conveniently granulate the EDDHA-FeNa chelate liquid, facilitate the re-granulation of non-granulated EDDHA-FeNa product to reduce losses, facilitate the uniform atomization of multiple groups of EDDHA-FeNa chelate liquid, improve the atomization effect, increase the spray volume, and improve the output of spray granulation.

[0019] When multiple spray guns need to be adjusted in height, the lifting cylinder drives the bidirectional cylinder to move via the lifting push rod. The bidirectional cylinder then moves the support arm, hollow tilting arm, and spray gun to the appropriate height. Once the spray gun is adjusted to the appropriate height, the bidirectional cylinder drives two sets of support arms to move. The support arms then move the hollow tilting arm and spray gun to facilitate adjustment of the spray range. When the spray angle needs to be adjusted, the tilting cylinder drives the drive block to rotate around the tilting shaft via the drive shaft. The drive block then rotates the hollow tilting arm, which in turn rotates multiple spray guns. This allows for convenient adjustment of the spray angle of multiple spray guns, enabling convenient adjustment of the spray height of the EDDHA-FeNa chelate solution in the granulation device. This also facilitates adjustment of the spray angle of the EDDHA-FeNa chelate solution, increases the spray range of the granulation device, and improves its efficiency. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0021] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the hollow tilting arm of this utility model; Figure 4 This is a three-dimensional structural diagram of the bidirectional cylinder of this utility model; Figure 5 This is a three-dimensional structural diagram of the spray gun of this utility model.

[0022] Figure label: 1. Drying tower; 2. Feed pump; 3. Feed pipe; 4. Feed pump; 5. Hopper; 6. Feed pipe; 7. External fluidized bed; 8. Feed pipe; 9. Cyclone separator; 10. Discharge pipe; 11. Bag filter; 12. Front return pipe; 13. Return system; 14. Pressure relief valve; 15. Pneumatic vibratory hammer; 16. Atomizing pipe; 17. Lifting cylinder; 18. Two-way cylinder; 19. Insulation board; 20. Support arm; 21. Hollow tilting arm; 22. Spray gun; 23. Limiting rod; 24. Limiting sleeve; 25. Lifting push rod; 26. Tilting shaft; 27. Support block; 28. Tilting cylinder; 29. ​​Drive shaft; 30. Drive block; 31. Rear return pipe; 32. Second pipe.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0024] The following is a detailed description of a spray drying granulation apparatus for EDDHA-FeNa provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0025] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0026] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0027] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0028] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0029] like Figures 1 to 5 As shown, an embodiment of this utility model provides a spray drying granulation device for EDDHA-FeNa, including a drying tower 1 and a feed pump 2. The feed pump 2 is installed outside the drying tower 1, and a feed pipe 3 is installed on the outer wall of the feed pump 2. A discharge hopper 5 is installed at the bottom of the drying tower 1, and pneumatic vibrating hammers 15 are symmetrically installed on the outer wall of the discharge hopper 5. A feeding pump 4 is installed on the outer wall of the discharge hopper 5 on one side of the pneumatic vibrating hammer 15. A second pipe 32 is installed at the bottom of the feeding pump 4, and a discharge pipe 6 is installed at the bottom of the discharge hopper 5. An external flow channel is provided outside the discharge hopper 5 below the discharge pipe 6. A fluidized bed 7 is provided, and a feed pipe 6 extends into the interior of the external fluidized bed 7. A second pipe 32 extends into the interior of the external fluidized bed 7. A feed pipe 8 is installed on the outer wall of the feed pump 4 on one side of the pneumatic vibrating hammer 15. A cyclone separator 9 is installed outside the external fluidized bed 7 on one side of the feed pipe 8, with one end of the feed pipe 8 extending into the interior of the feed pump 4 and the other end extending into the interior of the cyclone separator 9. A return system 13 is installed at the bottom of the cyclone separator 9, and a discharge pipe 10 is installed at the top of the cyclone separator 9. A bag filter 1 is installed outside the cyclone separator 9 on one side of the discharge pipe 10. 1. One end of the discharge pipe 10 extends into the interior of the cyclone separator 9, and the other end extends into the interior of the bag filter 11. A front return pipe 12 is installed at the bottom of the bag filter 11, with one end extending into the interior of the bag filter 11 and the other end extending into the interior of the return system 13. A rear return pipe 31 is installed on the outer wall of the return system 13 on the side away from the front return pipe 12, with one end extending into the interior of the return system 13 and the other end extending into the interior of the drying tower 1. Insulation plates 19 are symmetrically installed on the outer wall of the drying tower 1. A pressure relief valve 14 is installed at the top of the drying tower 1. A lifting cylinder 17 is installed at the top of the drying tower 1 on one side of the pressure relief valve 14. A lifting push rod 25 is installed at the output end of the lifting cylinder 17, and the lifting push rod 25 extends into the interior of the drying tower 1. A bidirectional cylinder 18 is installed at the end of the lifting push rod 25 away from the lifting cylinder 17. A support arm 20 is installed at the output end of each bidirectional cylinder 18. A hollow rotating arm 21 is movably installed on the outer wall of each support arm 20. Multiple sets of spray guns 22 with equal spacing are installed on the outer wall of each hollow rotating arm 21.

[0030] Feed pump 2 is turned on, and feed pump 2 delivers the external EDDHA-FeNa chelate solution through feed pipe 3 to the internal atomizing pipes 16 of the two sets of atomizing pipes 16. The atomizing pipes 16 then deliver the EDDHA-FeNa chelate solution into the interior of the hollow rotating arm 21. Spray gun 22 is turned on to spray the EDDHA-FeNa chelate solution evenly, which falls through hopper 5 and feed pipe 6 onto the surface of the external fluidized bed 7 to facilitate the formation of powder from the EDDHA-FeNa chelate solution. At the same time, pressure relief valve 14 is turned on to prevent the pressure from entering the drying tower 1. Under overpressure operation, feed pump 4 is turned on. Supported by hopper 5, feed pump 4 draws EDDHA-FeNa powder from the surface of external fluidized bed 7 into feed pipe 8 through second pipe 32. At the same time, pneumatic vibrating hammer 15 is turned on to prevent dry powder from adsorbing and accumulating on the inner wall of the tower, so that the powder can be discharged from the outlet in time. EDDHA-FeNa powder is transported to the inside of cyclone separator 9 through feed pipe 8. Cyclone separator 9 is turned on, and under the action of cyclone separator 9, EDDHA-FeNa powder is separated into powder and powder. FeNa powder is transformed into granular EDDHA-FeNa product. The non-granulated EDDHA-FeNa product is conveyed through the discharge pipe 10 to the inside of the bag filter 11. The bag filter 11 collects the non-granulated EDDHA-FeNa and conveys it through the front return pipe 12 to the inside of the return system 13. Under the action of the return system 13, the non-granulated EDDHA-FeNa is conveyed through the rear return pipe 31 to the inside of the drying tower 1 for re-granulation, reducing the loss of EDDHA-FeNa. The drying tower 1 and the feed pump 2 are made of 304 stainless steel, and the other supporting parts are made of ordinary carbon steel. The inner wall of the drying tower 1 is mirror polished. This makes it convenient for the granulation device to granulate the EDDHA-FeNa chelate liquid, facilitates the re-granulation of the non-granulated EDDHA-FeNa product to reduce losses, facilitates the uniform atomization of the EDDHA-FeNa chelate liquid in multiple groups, improves the atomization effect, increases the spray volume, and improves the output of spray granulation.

[0031] A limiting sleeve 24 is symmetrically installed on the top of the drying tower 1 on one side of the lifting cylinder 17. A limiting rod 23 is slidably installed inside the limiting sleeve 24 and extends into the interior of the drying tower 1. The limiting rod 23 is connected to the bidirectional cylinder 18. An atomizing tube 16 is symmetrically installed on the outer wall of the feeding pipe 3 near the lifting cylinder 17 and extends into the interior of the hollow tilting arm 21. A tilting shaft 26 is installed on the outer wall of the support arm 20 near the hollow tilting arm 21 and is movably connected to the hollow tilting arm 21 through the tilting shaft 26. A support block 27 is installed at the bottom of the support arm 20 and a tilting cylinder 28 is movably installed at the bottom of the support block 27. A drive shaft 29 is installed at the output end of the tilting cylinder 28 and a drive block 30 is fitted on the surface of the drive shaft 29 and is connected to the hollow tilting arm 21.

[0032] When multiple spray guns 22 need height adjustment, the lifting cylinder 17 is opened. Supported by the drying tower 1, the lifting cylinder 17 moves the bidirectional cylinder 18 via the lifting push rod 25. The limiting rod 23 slides inside the limiting sleeve 24 to provide sliding support for the bidirectional cylinder 18. The bidirectional cylinder 18 moves the support arm 20, the hollow tilting arm 21, and the spray gun 22 to the appropriate height. After the spray gun 22 is adjusted to the appropriate height, the bidirectional cylinder 18 is opened again. Supported by the lifting push rod 25, the bidirectional cylinder 18 moves the two sets of support arms 20. The support arms 20 then move the hollow tilting arm 21 and the spray gun 22 to facilitate the adjustment of the spray gun 22. Regarding the spray range, when it is necessary to adjust the spray angle of the spray gun 22, the tilting cylinder 28 is opened. Under the movable support of the support block 27, the tilting cylinder 28 drives the drive block 30 to rotate around the tilting shaft 26 via the drive shaft 29. The drive block 30 drives the hollow tilting arm 21 to rotate, and the hollow tilting arm 21 drives multiple sets of spray guns 22 to rotate, so as to facilitate the convenient adjustment of the spray angle of multiple sets of spray guns 22. This realizes the convenient adjustment of the spray height of the EDDHA-FeNa chelate liquid in the granulation device, facilitates the adjustment of the spray angle of the EDDHA-FeNa chelate liquid, increases the spray range of the granulation device, and improves the efficiency of the granulation device.

[0033] The working principle of the technical solution provided by this utility model is as follows: The feed pump 2 delivers the external EDDHA-FeNa chelate solution through the feed pipe 3 to the internal atomizing pipes 16 of the two sets of atomizing pipes 16. The atomizing pipes 16 then deliver the EDDHA-FeNa chelate solution to the inside of the hollow rotating arm 21. The spray gun 22 is opened to spray the EDDHA-FeNa chelate solution evenly. After passing through the feed hopper 5 and the feed pipe 6, the solution falls onto the surface of the external fluidized bed 7, facilitating the formation of powder from the EDDHA-FeNa chelate solution. The feed pump 4 delivers the external fluidized bed 7 through the second pipe 32. The EDDHA-FeNa powder on the surface of the chemical bed 7 is drawn into the feed pipe 8. Simultaneously, the pneumatic vibrating hammer 15 is activated to prevent the dry powder from adsorbing and accumulating on the inner wall of the tower, ensuring timely discharge from the outlet. The EDDHA-FeNa powder is then conveyed through the feed pipe 8 to the cyclone separator 9. Under the action of the cyclone separator 9, the EDDHA-FeNa powder is transformed into granular EDDHA-FeNa product. The non-granular EDDHA-FeNa product is then conveyed through the discharge pipe 10 to the bag filter 11. Inside the bag filter 11, the non-granulated EDDHA-FeNa is collected and transported to the inside of the return system 13 through the front return pipe 12. Under the action of the return system 13, the non-granulated EDDHA-FeNa is transported to the inside of the drying tower 1 through the rear return pipe 31 for re-granulation, reducing the loss of EDDHA-FeNa. The lifting cylinder 17 drives the bidirectional cylinder 18 to move through the lifting push rod 25. The bidirectional cylinder 18 drives the support arm 20, the hollow tilting arm 21, and the spray gun 22 to move to a suitable height. When the spray gun is activated... After the spray gun 22 is adjusted to a suitable height, the bidirectional cylinder 18 drives the two sets of support arms 20 to move. The support arms 20 drive the hollow rotating arm 21 and the spray gun 22 to facilitate the adjustment of the spray range of the spray gun 22. When it is necessary to adjust the spray angle of the spray gun 22, the rotating cylinder 28 drives the drive block 30 to rotate around the rotating shaft 26 via the drive shaft 29. The drive block 30 drives the hollow rotating arm 21 to rotate. The hollow rotating arm 21 drives multiple sets of spray guns 22 to rotate, so as to facilitate the convenient adjustment of the spray angle of multiple sets of spray guns 22 to complete the operation of the granulation device.

[0034] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A spray drying granulation apparatus for EDDHA-FeNa, characterized in that: The system includes a drying tower and a feed pump. The feed pump is located outside the drying tower, and a feed pipe is installed on the outer wall of the feed pump. A hopper is installed at the bottom of the drying tower, and pneumatic vibrating hammers are symmetrically installed on the outer wall of the hopper. A feeding pump is installed on the outer wall of the hopper on one side of the pneumatic vibrating hammers, and a second pipe is installed at the bottom of the feeding pump. A feed pipe is installed at the bottom of the hopper, and an external fluidized bed is located outside the hopper below the feed pipe, with the feed pipe extending into the interior of the external fluidized bed. A feed pipe is installed on the outer wall of the feeding pump on one side of the pneumatic vibrating hammers, and a cyclone separator is located outside the external fluidized bed on one side of the feed pipe, with one end of the feed pipe extending into the interior of the feeding pump and the other end extending into the interior of the cyclone separator. A return system is installed at the bottom of the cyclone separator.

2. The spray drying granulation apparatus for EDDHA-FeNa according to claim 1, characterized in that: The top of the cyclone separator is equipped with a discharge pipe. A bag filter is installed on the outside of the cyclone separator on one side of the discharge pipe. One end of the discharge pipe extends into the interior of the cyclone separator, and the other end of the discharge pipe extends into the interior of the bag filter.

3. The spray drying granulation apparatus for EDDHA-FeNa according to claim 2, characterized in that: The bottom of the bag filter is equipped with a front return pipe, one end of which extends into the interior of the bag filter and the other end of which extends into the interior of the return system. A rear return pipe is installed on the outer wall of the return system on the side away from the front return pipe, one end of which extends into the interior of the return system and the other end of which extends into the interior of the drying tower.

4. The spray drying granulation apparatus for EDDHA-FeNa according to claim 3, characterized in that: The outer wall of the drying tower is symmetrically equipped with insulation boards. A pressure relief valve is installed at the top of the drying tower. A lifting cylinder is installed at the top of the drying tower on one side of the pressure relief valve. A lifting push rod is installed at the output end of the lifting cylinder, and the lifting push rod extends into the interior of the drying tower. A two-way cylinder is installed at the end of the lifting push rod away from the lifting cylinder. A support arm is installed at the output end of each two-way cylinder.

5. The spray drying granulation apparatus for EDDHA-FeNa according to claim 4, characterized in that: Hollow tilting arms are movably installed on the outer wall of each support arm, and multiple sets of spray guns with equal spacing are installed on the outer wall of each hollow tilting arm. Limiting sleeves are symmetrically installed on the top of the drying tower on one side of the lifting cylinder.

6. The spray drying granulation apparatus for EDDHA-FeNa according to claim 5, characterized in that: Each limiting sleeve has a limiting rod slidably installed inside, and the limiting rod extends into the interior of the drying tower, and the limiting rod is connected to the bidirectional cylinder.

7. The spray drying granulation apparatus for EDDHA-FeNa according to claim 6, characterized in that: Atomizing tubes are symmetrically installed on the outer wall of the feeding pipe near the lifting cylinder, and the atomizing tubes extend into the interior of the hollow tilting arm.

8. The spray drying granulation apparatus for EDDHA-FeNa according to claim 7, characterized in that: Each of the support arms has a flipping shaft installed on the outer wall near the hollow flipping arm, and the support arm is movably connected to the hollow flipping arm via the flipping shaft.

9. The spray drying granulation apparatus for EDDHA-FeNa according to claim 8, characterized in that: Each support arm has a support block installed at its bottom end, and each support block has a tilting cylinder movably installed at its bottom end.

10. The spray drying granulation apparatus for EDDHA-FeNa according to claim 9, characterized in that: The output end of each tilting cylinder is equipped with a drive shaft, and the surface of each drive shaft is fitted with a drive block, which is connected to the hollow tilting arm.

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