A spray granulation drying device and process

Abstract

The present invention relates to the field of spray drying technology, and discloses a spray granulation drying device, including a spray drying cylinder, a mixing agitator is installed at the upper end of the spray drying cylinder, a sealing cover is provided at the upper end of the mixing agitator, and an atomizer is provided at the bottom of the mixing agitator. The spray granulation drying device and process described in the present invention are designed with a grinding cylinder, and the airflow sprays the cloth bag, and the fine particles fall into the discharge seat, and then are guided downward through the annular guide cylinder to evenly enter the grinding bottom plate of the grinding cylinder, and the uniform speed motor is started to drive the second gear to rotate, and the rotating rod is rotated by meshing with the first gear, driving the entire grinding bottom plate to make a circular motion, so that the grinding balls on the grinding bottom plate roll, and the fine material particles are fully ground by their own gravity and friction, destroying the bonding strength, so that they are split into the original material, and the finer material is filtered from the filter hole to avoid the recovered material from not being able to be used directly.

Description

Technical Field

[0001] The invention relates to the technical field of spray drying, and in particular to a spray granulation drying device and process. Background Art

[0002] Spray drying granulation is a method of mixing the raw materials and auxiliary materials used for granulation with a binder, continuously stirring to form a uniform suspension containing 50% to 60% solids, and then using a pump to input the suspension into a special atomizer through a high-pressure pump nozzle or a centrifugal disk to atomize into fine droplets, and then under the action of a hot air blower, drying in a hot air flow to obtain approximately spherical particles.

[0003] The existing spray granulation drying device has certain technical defects when in use. First, the hot air is directly injected into the spray drying cylinder, and the flow path in the spray drying cylinder is short, the residence time is short, the contact time with the atomized droplets is short, the drying is not sufficient, and heat is wasted; second, the hot air will carry some small unprecipitated particles into the dust collector, thereby causing a waste of raw materials and increasing the granulation cost; third, the material in the receiving hopper is easily blocked at the discharge port during the release process, resulting in a slow discharge speed and reduced production efficiency.

[0004] In summary, considering that the existing facilities cannot meet the work requirements, we propose a spray granulation drying device and process. Summary of the invention

[0005] The main purpose of the present invention is to provide a spray granulation drying device and process, which can effectively solve the problems in the background technology.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A spray granulation drying device comprises a spray drying cylinder, wherein a mixing agitator is installed at the upper end of the spray drying cylinder, a sealing cover is arranged at the upper end of the mixing agitator, an atomizer is arranged at the bottom of the mixing agitator, a mist outlet of the atomizer is downwardly connected to a flow pipe, and the flow pipe passes through the upper end of the spray drying cylinder and extends into the interior thereof.

[0008] As a preferred embodiment of the spray granulation drying device of the present invention, a U-shaped dryer is installed in the middle of the spray drying cylinder.

[0009] As a preferred solution of the spray granulation drying device of the present invention, a synchronous driving structure is provided at the bottom of the U-shaped dryer.

[0010] As a preferred embodiment of the spray granulation drying device described in the present invention, the bottom of the spray drying cylinder is connected to a receiving hopper, the bottom of the receiving hopper is provided with a discharge pipe, one side of the spray drying cylinder is connected to the inner wall of the bag dust collector through an exhaust pipe, and a discharge seat is installed at the bottom of the bag dust collector.

[0011] As a preferred embodiment of the spray granulation drying device described in the present invention, a grinding cylinder is installed at the lower end of the discharge seat, a collection seat is provided at the bottom of the grinding cylinder, the collection seat is connected to the upper end surface of the sealing cover through a suction pipe, and a suction fan is installed on the suction pipe.

[0012] As a preferred embodiment of the spray granulation drying device described in the present invention, the synchronous drive structure includes a connecting shaft, a first bearing seat, a small cam, a first wheel seat and a first contact wheel. The connecting shaft is horizontally arranged below the U-shaped dryer, and the two ends of the connecting shaft are fixed by two groups of first bearing seats and the bottom of the U-shaped dryer. Small cams are equidistantly sleeved on the connecting shaft, and a first wheel seat is arranged above each group of small cams. A first wheel groove is opened inside the first wheel seat, and a first contact wheel is rotatably arranged in the first wheel groove, and the wheel surface of the first contact wheel and the small cam are in conflict.

[0013] As a preferred embodiment of the spray granulation drying device described in the present invention, the synchronous drive structure further includes a lifting rod, a first tensioning spring, a baffle, a large gear and a storage plate groove, a lifting rod is vertically welded to the upper end of the first wheel seat, a first tensioning spring is connected to the outer sleeve of the lifting rod, the first tensioning spring is respectively fixed to the first wheel seat and the bottom of the U-shaped dryer, a baffle is welded to the upper end of the lifting rod, and a large gear is sleeved on the connecting shaft.

[0014] As a preferred embodiment of the spray granulation drying device described in the present invention, a U-shaped left cavity is provided on the left side of the interior of the U-shaped dryer, the upper end of the U-shaped left cavity is connected to the hot air flow pipe, the hot air flow pipe extends to the outside of the spray drying cylinder and is connected to the hot air appliance, a storage tank is provided at the bottom of the U-shaped left cavity, a discharge valve is installed at the bottom of the storage tank, a droplet retention chamber is provided inside the U-shaped dryer and connected to the side of the U-shaped left cavity, the flow pipe extends to the interior of the U-shaped dryer, and a mist outlet is provided on the flow pipe at the position of the droplet retention chamber.

[0015] As a preferred embodiment of the spray granulation drying device described in the present invention, a multi-step stepped flow channel is provided at a lower position inside the U-shaped dryer and connected to the U-shaped left cavity, the multi-step stepped flow channel includes a plurality of groups of interconnected step units, the number of the step units and the small cams are preferably 4-6 groups, baffles are used to block the flow between adjacent step units, a storage plate groove matching the baffle is provided at the bottom of the step unit, a U-shaped right cavity connected to the multi-step stepped flow channel is provided at the right position inside the U-shaped dryer, a quick discharge port is provided at the bottom of the U-shaped right cavity, the top of the U-shaped right cavity is connected to the exhaust pipe, and a material blocking net is installed between the U-shaped right cavity and the exhaust pipe.

[0016] As a preferred embodiment of the spray granulation drying device of the present invention, a grinding chamber is provided inside the grinding cylinder, a grinding bottom plate is movably provided at the bottom of the grinding chamber, an annular material guide cylinder is provided in the middle of the grinding bottom plate, the annular material guide cylinder extends upward into the interior of the discharge seat, filter holes are evenly provided around the outer circle of the grinding bottom plate, grinding balls are movably provided on the filter holes, and the number of the grinding balls is preferably 2 groups.

[0017] As a preferred embodiment of the spray granulation drying device described in the present invention, a rotating rod is welded to the middle position of the lower end of the grinding base plate, the bottom of the rotating rod is fixed by the second bearing seat and the middle position of the bottom of the aggregate seat, a first gear is sleeved on the rotating rod, a second gear is meshed on one side of the first gear, the second gear is sleeved on the output shaft of the uniform speed motor, and the uniform speed motor and the second bearing seat are fixed.

[0018] As a preferred embodiment of the spray granulation drying device described in the present invention, an outer shell is provided on the outer side of the feed pipe, a large cam is movably provided on the right end of the inner side of the outer shell, the large cam is sleeved on the vertical camshaft, the upper end of the vertical camshaft is fixed to the outer shell through a third bearing seat, the lower end of the vertical camshaft is connected to the first servo motor through a coupling, a second wheel seat is provided on the horizontal side of the large cam, a second wheel groove is provided inside the second wheel seat, and a second contact wheel in contact with the large cam is rotatably provided in the second wheel groove.

[0019] As a preferred embodiment of the spray granulation drying device described in the present invention, a displacement rod is welded to the end of the second wheel seat away from the second contact wheel, a partition is arranged inside the outer shell, a rod groove for the displacement rod to pass through is opened on the partition, a second tensioning spring sleeved on the outside of the displacement rod is arranged between the second wheel seat and the partition, a dredging seat is arranged at the end of the displacement rod, two rows of upper and lower elastic dredging strips are clamped on the dredging seat, the number of the elastic dredging strips is preferably 8-12 groups, the other end of the elastic dredging strip is welded to the inner wall of the discharge pipe, and the outer surface of the elastic dredging strip is evenly distributed with protrusions.

[0020] As a preferred solution of the spray granulation drying device of the present invention, the suction fan is fixed by a bracket and an outer wall of the spray drying cylinder.

[0021] As a preferred embodiment of the spray granulation drying device of the present invention, a plurality of groups of legs are evenly distributed on the bottom of the spray drying cylinder, and the number of the legs is preferably 3-4 groups.

[0022] As a preferred embodiment of the spray granulation drying device of the present invention, a ventilation grille is provided on the right side of the bag filter.

[0023] As a preferred solution of the spray granulation drying device described in the present invention, a small gear is meshed on the upper end of the large gear, and the small gear is sleeved on the output shaft of the second servo motor, and the second servo motor is installed at the bottom of the U-shaped dryer.

[0024] As a preferred solution of the spray granulation drying device of the present invention, the height of each group of baffles increases successively.

[0025] As a preferred solution of the spray granulation drying device of the present invention, an annular sealing groove is provided at an outer position inside the aggregate seat.

[0026] A spray granulation drying process comprises the following steps:

[0027] S1: The slurry is injected into the atomizer for atomization. The atomized liquid is injected downward from the flow tube into the U-shaped dryer. After passing through the cooperation of the U-shaped left cavity, the multi-step stepped flow channel and the U-shaped right cavity, the atomized liquid droplets are dried to form material particles, which are injected into the receiving hopper.

[0028] S2: When the receiving hopper releases material particles, the first servo motor is started to drive the displacement rod to move linearly toward the lower material pipe, and the lower elastic dredging strip is elastically bent upward and downward in the lower material pipe to dredge the material particles blocked in the lower material pipe.

[0029] S3: The fine material particles are blown down into the discharge seat, and then guided downward by the annular guide cylinder to evenly enter the grinding bottom plate of the grinding cylinder. The entire grinding bottom plate is driven to make a circular motion, and the grinding balls roll. The fine material particles are fully ground by their own gravity and friction. Then the suction fan is started to suck the material from the annular sealing groove through the suction pipe and send it back into the mixing agitator.

[0030] The present invention provides a spray granulation drying device and process through improvement, which has the following significant improvements and advantages compared with the prior art:

[0031] The U-shaped dryer is designed so that the hot air flow creates negative pressure in the droplet retention chamber, so that part of the atomized droplets are sucked into the hot air flow and flow downward together, thereby achieving the purpose of controlling the amount of atomized droplets released and entering the multi-step flow channel position, crossing multiple step units from left to right in sequence, thereby ensuring that the droplets and the hot air flow are in full contact and the contact time is long, thereby improving the drying effect.

[0032] A synchronous drive structure is designed to start the second servo motor to drive the connecting shaft to rotate, thereby causing several groups of small cams on the connecting shaft to rotate, and the protrusions of the small cams are used to push the lifting rod to move upward, driving the baffle plate to move out of the storage plate groove to block the flow of hot air flow between adjacent step units. Then the baffle plate returns to the storage plate groove under the reset force of the first tensioning spring, and is repeatedly lifted and lowered to reduce the flow speed of the hot air flow, increase the contact time between the droplets and the hot air flow, and further improve the drying effect. Since the protrusions of each group of small cams are in different directions, several groups of baffle plates will be formed to block and seal in sequence, thereby allowing the air flow to flow smoothly.

[0033] Start the suction fan, suck the material from the annular sealing groove through the suction pipe, and send it back into the mixing agitator to achieve the purpose of secondary recovery, solve the waste problem and save costs.

[0034] The grinding cylinder is designed so that the airflow blows the cloth bag, and the fine particles fall into the discharge seat, and then are guided downward through the annular guide column and evenly enter the grinding bottom plate of the grinding cylinder. By starting the uniform speed motor, the second gear is driven to rotate, and through meshing with the first gear, the rotating rod is rotated, driving the entire grinding bottom plate to make a circular motion, so that the grinding balls on the grinding bottom plate roll, and the fine material particles are fully ground by their own gravity and friction, destroying the bonding strength and splitting them into original materials. Finer materials are filtered from the filter holes, thereby avoiding the recycled materials from being unable to be used directly.

[0035] Start the first servo motor to drive the large cam on the vertical camshaft to rotate. When the protruding part of the large cam contacts the second contact wheel, a force is generated to make the displacement rod move linearly toward the lower material pipe. The two rows of elastic dredging strips on the dredging seat are subjected to pressure. The upper and lower elastic dredging strips are elastically bent upward and downward respectively in the material discharge pipe to open up the internal space, and then return to their original state as the displacement rod returns to its original position. This process is repeated to dredge the material particles blocked in the material discharge pipe, thereby speeding up the discharge speed and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 Schematic diagram of the external structure of the spray drying cylinder and the grinding cylinder of the present invention;

[0038] Figure 3 It is a schematic diagram of the external structure of the U-shaped dryer of the present invention;

[0039] Figure 4 It is a schematic diagram of the specific structure of the synchronous drive structure of the present invention;

[0040] Figure 5 It is a cross-sectional view of a U-shaped dryer of the present invention;

[0041] Figure 6 It is a schematic diagram of the interior of the grinding cylinder of the present invention;

[0042] Figure 7 It is a schematic diagram of the bottom transmission structure of the grinding cylinder of the present invention;

[0043] Figure 8 This is the installation position diagram of the outer shell structure of the present invention;

[0044] Fig. 9 It is a schematic diagram of the internal structure of the outer shell of the present invention;

[0045] Fig.10 It is a connection schematic diagram of the dredging seat of the present invention.

[0046] In the figure: 1, spray drying cylinder; 2, mixing agitator; 3, sealing cover; 4, atomizer; 5, flow pipe; 7, synchronous drive structure; 70, connecting shaft; 71, first bearing seat; 72, small cam; 73, first wheel seat; 74, first contact wheel; 75, lifting rod; 76, first tensioning spring; 77, baffle plate; 78, large gear; 79, receiving plate groove; 8, mist outlet; 9, droplet retention chamber; 10, U-shaped dryer; 11, hot air flow pipe; 12, U-shaped left chamber; 13, storage tank; 14, discharge valve; 15, multi-stage stepped flow channel; 16, stepped unit; 17, U-shaped right chamber; 18, fast discharge port; 19, exhaust pipe; 20, receiving hopper; 21, discharge pipe; 22, receiving container; 30, Bag filter; 31. discharge seat; 32. grinding cylinder; 33. grinding chamber; 34. grinding bottom plate; 35. annular material guide cylinder; 36. filter hole; 37. grinding ball; 40. rotating rod; 41. second bearing seat; 42. first gear; 43. second gear; 44. uniform speed motor; 45. collecting seat; 46. suction pipe; 47. suction fan; 50. outer shell; 51. large cam; 52. vertical camshaft; 53. third bearing seat; 54. first servo motor; 55. second wheel seat; 56. second contact wheel; 57. partition; 58. rod groove; 59. displacement rod; 60. second tensioning spring; 61. dredging seat; 62. elastic dredging strip; 63. protrusion; 66. small gear; 67. second servo motor. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0048] like Figure 1-7 As shown, this embodiment provides a spray granulation drying device, including a spray drying cylinder 1, a plurality of groups of legs are evenly distributed on the bottom of the spray drying cylinder 1, a mixing agitator 2 is installed on the upper end of the spray drying cylinder 1, the mixing agitator 2 includes an agitator, a sealing cover 3 is arranged on the upper end of the mixing agitator 2, an atomizer 4 is connected to the bottom of the mixing agitator 2, a flow pipe 5 is connected downwardly to the mist outlet of the atomizer 4, and the flow pipe 5 passes through the upper end of the spray drying cylinder 1 and extends to the inside thereof.

[0049] Furthermore, a U-shaped dryer 10 is installed in the middle of the spray drying cylinder 1, and a synchronous driving structure 7 is provided at the bottom of the U-shaped dryer 10. Figure 3 shown.

[0050] Specifically, the synchronous drive structure 7 includes a connecting shaft 70, a first bearing seat 71, a small cam 72, a first wheel seat 73 and a first contact wheel 74. Figure 4 shown.

[0051] In this embodiment, the connecting shaft 70 is horizontally arranged below the U-shaped dryer 10, and the two ends of the connecting shaft 70 are fixed by two groups of first bearing seats 71 and the bottom of the U-shaped dryer 10, which play a connecting and fixing role. Small cams 72 are equidistantly sleeved on the connecting shaft 70, and the directions of the protruding parts of the small cams 72 are arranged according to a regular pattern. A first wheel seat 73 is arranged above each group of small cams 72, and a first wheel groove is opened inside the first wheel seat 73. A first contact wheel 74 is rotatably arranged in the first wheel groove. The first contact wheel 74 partially extends downward, and the wheel surface of the first contact wheel 74 and the small cam 72 are in conflict.

[0052] Furthermore, the synchronous drive structure 7 further includes a lifting rod 75, a first tensioning spring 76, a baffle plate 77, a large gear 78 and a receiving plate slot 79, as shown in FIG. Figure 4 and 5 shown.

[0053] In this embodiment, a lifting rod 75 is vertically welded to the upper end of the first wheel seat 73, and a first tensioning spring 76 is connected to the outer sleeve of the lifting rod 75. The first tensioning spring 76 is respectively fixed to the first wheel seat 73 and the bottom of the U-shaped dryer 10. The first tensioning spring 76 is used to maintain the contact force between the first contact wheel 74 and the small cam 72. A baffle plate 77 is welded to the upper end of the lifting rod 75. The height of each group of baffle plates 77 increases successively to adapt to the height of the step unit 16.

[0054] In this embodiment, a large gear 78 is sleeved on the connecting shaft 70 , and a small gear 66 is meshed on the upper end of the large gear 78 . The small gear 66 is sleeved on the output shaft of the second servo motor 67 , and the second servo motor 67 is installed at the bottom of the U-shaped dryer 10 .

[0055] Furthermore, a U-shaped left cavity 12 is provided on the left side of the U-shaped dryer 10, and is vertically opened. Figure 5 shown.

[0056] The upper end of the U-shaped left chamber 12 is connected to the hot air flow pipe 11, which extends to the outside of the spray drying cylinder 1 and is connected to the hot air appliance. A storage tank 13 is provided at the bottom of the U-shaped left chamber 12, and a discharge valve 14 is installed at the bottom of the storage tank 13. Figure 3 and 5 shown.

[0057] Furthermore, a droplet retention chamber 9 is provided inside the U-shaped dryer 10 and communicated with the side of the U-shaped left chamber 12. Figure 5 shown.

[0058] The flow pipe 5 extends into the interior of the U-shaped dryer 10, and a mist outlet 8 is provided at the position of the droplet retention chamber 9. Figure 5 shown.

[0059] Furthermore, a multi-step flow channel 15 is provided at a lower position inside the U-shaped dryer 10 and communicated with the U-shaped left chamber 12. Figure 5 shown.

[0060] The multi-step flow channel 15 includes a plurality of groups of interconnected step units 16, and baffles 77 are used to block the flow between adjacent step units 16. The bottom of the step unit 16 is provided with a receiving plate groove 79 that matches the baffle 77 to play a role in receiving and limiting. Figure 5 shown.

[0061] Furthermore, a U-shaped right chamber 17 connected to the multi-step stepped flow channel 15 is provided at the right position inside the U-shaped dryer 10. The U-shaped right chamber 17 is vertically arranged. Figure 5 shown.

[0062] The bottom of the U-shaped right cavity 17 is provided with a quick discharge port 18, the top of the U-shaped right cavity 17 is connected to the exhaust pipe 19, and a material blocking net is installed between the U-shaped right cavity 17 and the exhaust pipe 19 to block material particles and prevent them from overflowing. Figure 5 shown.

[0063] Furthermore, the bottom of the spray drying cylinder 1 is connected to a receiving hopper 20, the bottom of the receiving hopper 20 is provided with a feeding pipe 21, and a receiving container 22 is placed at the lower end of the feeding pipe 21. Figure 2 shown.

[0064] Further, one side of the spray drying cylinder 1 is connected to the inner wall of the bag dust collector 30 through the exhaust pipe 19, and a ventilation grille is provided on the right side of the bag dust collector 30 for discharging hot air and water vapor. A discharge seat 31 is installed at the bottom of the bag dust collector 30, and a grinding cylinder 32 is installed at the lower end of the discharge seat 31. A collection seat 45 is provided at the bottom of the grinding cylinder 32, and the two are connected. The collection seat 45 is connected to the upper end surface of the sealing cover 3 through a suction pipe 46, and a suction fan 47 is installed on the suction pipe 46. The suction fan 47 is fixed through a bracket and the outer wall of the spray drying cylinder 1, as shown in FIG. Figure 1 and 2 shown.

[0065] The grinding cylinder 32 has a grinding chamber 33 formed inside, a grinding bottom plate 34 movably disposed at the bottom of the grinding chamber 33, an annular guide cylinder 35 disposed in the middle of the grinding bottom plate 34, the annular guide cylinder 35 extending upward into the inside of the discharge seat 31, filter holes 36 are evenly disposed on the outer circle of the grinding bottom plate 34, grinding balls 37 are movably disposed on the filter holes 36, and the outer circle of the grinding bottom plate 34 is concave to facilitate the rolling of the grinding balls 37. Figure 6 shown.

[0066] Among them, a rotating rod 40 is welded at the middle position of the lower end of the grinding bottom plate 34, and the bottom of the rotating rod 40 is fixed by the second bearing seat 41 and the middle position of the bottom of the collecting seat 45. A first gear 42 is sleeved on the rotating rod 40, and a second gear 43 is meshed on one side of the first gear 42. The second gear 43 is sleeved on the output shaft of the uniform speed motor 44, and the uniform speed motor 44 is fixed to the second bearing seat 41. Figure 7 shown.

[0067] Furthermore, an annular sealing groove is provided at the outer portion of the material collecting seat 45 , in which materials are stored and sucked out through the lower end of the material suction pipe 46 .

[0068] When the present embodiment is in use, the material inside is first stirred by the mixing agitator 2 (adhesive needs to be added) to form a slurry, and then the slurry is injected into the atomizer 4 for atomization to form atomized droplets. The droplets flow downward from the flow tube 5 until they flow out from the mist outlet 8 and gather in the droplet retention chamber 9. At the same time, the hot air appliance is operated to continuously blow out a hot air flow from the hot air flow pipe 11, and then enter the U-shaped left cavity 12 of the U-shaped dryer 10. Because the flow of the hot air flow causes a negative pressure in the droplet retention chamber 9, part of the atomized droplets are sucked into the hot air flow, and then flow downward together and enter the multi-stage stepped flow channel 15, crossing a plurality of stepped units 16 from left to right in turn, thereby ensuring that the droplets and the hot air flow are in full contact and have a long contact time.

[0069] At the same time, the second servo motor 67 on the synchronous drive structure 7 is started to drive the connecting shaft 70 to rotate, so that the several groups of small cams 72 on the connecting shaft 70 rotate accordingly, and the protrusions of the small cams 72 are used to push the lifting rod 75 to move upward, driving the baffle plate 77 to move out of the storage plate groove 79 to block the flow of the hot air flow between adjacent step units 16, and then the baffle plate 77 returns to the storage plate groove 79 under the reset force of the first tensioning spring 76. The repeated lifting and lowering reduces the flow speed of the hot air flow and increases the contact time between the droplets and the hot air flow. Since the protrusions of each group of small cams 72 are in different directions, several groups of baffle plates 77 will be formed to block and seal in sequence, so that the air flow can flow smoothly.

[0070] After that, the hot air flow will enter the U-shaped right chamber 17, and the hot air flow will rise and flow and be discharged from the exhaust pipe 19. The dried material particles in the U-shaped right chamber 17 will gather and be discharged downward from the quick discharge port 18, and enter the receiving hopper 20 for temporary storage. Some material particles will roll to the left along the multi-step stepped flow channel 15, gather and be temporarily stored in the storage trough 13, and then be released into the receiving hopper 20 after the discharge valve 14 is opened.

[0071] The hot air flow will enter the bag filter 30 from the exhaust pipe 19, and the fine material particles in the hot air flow will be adsorbed by the multiple bags in the bag filter 30, and will be ejected through the air flow after being gathered, and fall into the discharge seat 31, and then be guided downward through the annular guide column 35 to evenly enter the grinding bottom plate 34 of the grinding cylinder 32. By starting the uniform speed motor 44, the second gear 43 is driven to rotate, and the rotating rod 40 is rotated by meshing with the first gear 42, driving the entire grinding bottom plate 34 to make a circular motion, so that the grinding balls 37 on the grinding bottom plate 34 roll, and the fine material particles are fully ground by their own gravity and friction, destroying the bonding strength and splitting them into the original materials. The finer materials are filtered from the filter holes 36 and downward into the annular sealing groove of the collection seat 45. At this time, the suction fan 47 is started, and the materials are sucked from the annular sealing groove through the suction pipe 46 and sent back to the mixing agitator 2 to achieve the purpose of secondary recovery. Embodiment 2

[0072] On the basis of the first embodiment, the material in the receiving hopper 20 is easily blocked at the position of the feeding pipe 21 during the release process, resulting in a slow feeding speed. In order to solve the above technical problems, we have the following design, such as Figure 8-10 shown.

[0073] Specifically, an outer shell 50 is provided on the outside of the feeding tube 21, and a large cam 51 is movably provided on the right end of the inner part of the outer shell 50. The large cam 51 is sleeved on a vertical camshaft 52. The upper end of the vertical camshaft 52 is fixed to the outer shell 50 through a third bearing seat 53, and the lower end of the vertical camshaft 52 is connected to a first servo motor 54 through a coupling. The first servo motor 54 is arranged to penetrate the lower end surface of the outer shell 50, as shown in FIG. Figure 8 and 9 shown.

[0074] A second wheel seat 55 is provided on the horizontal side of the large cam 51, and a second wheel groove is provided inside the second wheel seat 55. A second contact wheel 56 is rotatably provided in the second wheel groove to contact the large cam 51. Fig. 9 shown.

[0075] A displacement rod 59 is welded to one end of the second wheel seat 55 away from the second contact wheel 56, a partition plate 57 is provided inside the outer shell 50, and a rod groove 58 for the displacement rod 59 to pass through is provided on the partition plate 57, which plays a limiting role, and a second tensioning spring 60 is provided between the second wheel seat 55 and the partition plate 57 and sleeved on the outer side of the displacement rod 59. The second tensioning spring 60 is used to maintain the force between the large cam 51 and the second contact wheel 56. Fig. 9 shown.

[0076] Furthermore, a dredging seat 61 is provided at the end of the displacement rod 59. Fig.10 shown.

[0077] Specifically, the dredging seat 61 is provided with two rows of elastic dredging strips 62, which can be disassembled and replaced. The other end of the elastic dredging strip 62 is welded to the inner wall of the feeding tube 21. The elastic dredging strip 62 itself is slightly bent to the outer side. The outer surface of the elastic dredging strip 62 is evenly distributed with protrusions 63, which play a stirring role. Fig.10 shown.

[0078] When this embodiment is in use, when the receiving hopper 20 releases material particles, the first servo motor 54 is started to drive the large cam 51 on the vertical camshaft 52 to rotate. When the protruding part of the large cam 51 contacts the second contact wheel 56, a force is generated to make the displacement rod 59 move linearly in the direction of the lower material pipe 21, thereby driving the dredging seat 61 to move. The two rows of elastic dredging strips 62 on the dredging seat 61 are subjected to pressure (the dredging seat 61 and the inner wall of the discharge pipe 21 act together), and the upper and lower elastic dredging strips 62 are elastically bent upward and downward in the discharge pipe 21, respectively, similar to an elliptical shape (opening up the internal space), and then return to their original state as the displacement rod 59 returns to its original position. This process is repeated to dredge the material particles blocked in the discharge pipe 21, thereby accelerating the discharge speed.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spray granulation drying device, comprising a spray drying cylinder (1), characterized in that: The upper end of the spray drying cylinder (1) is provided with a mixing stirrer (2), the upper end of the mixing stirrer (2) is provided with a sealing cover (3), the bottom of the mixing stirrer (2) is connected to an atomizer (4), the mist outlet of the atomizer (4) is connected downwardly to a flow pipe (5), the flow pipe (5) passes through the upper end of the spray drying cylinder (1) and extends into the interior thereof, a U-shaped dryer (10) is provided in the middle position inside the spray drying cylinder (1), and a synchronous drive structure (7) is provided at the bottom of the U-shaped dryer (10); The bottom of the spray drying cylinder (1) is connected to a receiving hopper (20), and a discharge pipe (21) is provided at the bottom of the receiving hopper (20). One side of the spray drying cylinder (1) is connected to the inner wall of the bag dust collector (30) through an exhaust pipe (19). A discharge seat (31) is installed at the bottom of the bag dust collector (30). A grinding cylinder (32) is installed at the lower end of the discharge seat (31). A collection seat (45) is provided at the bottom of the grinding cylinder (32). An annular sealing groove is provided at the outer position of the inside of the collection seat (45), in which materials are stored and sucked through the lower end of the suction pipe (46). The collection seat (45) is connected to the upper end surface of the sealing cover (3) through the suction pipe (46), and a suction fan (47) is installed on the suction pipe (46); The synchronous drive structure (7) comprises a connecting shaft (70), a first bearing seat (71), a small cam (72), a first wheel seat (73) and a first contact wheel (74); the connecting shaft (70) is horizontally arranged below the U-shaped dryer (10); the two ends of the connecting shaft (70) are fixed by two groups of first bearing seats (71) and the bottom of the U-shaped dryer (10); the connecting shaft (70) is sleeved with small cams (72) at equal intervals; the protruding parts of each group of small cams (72) are in different directions; a first wheel seat (73) is arranged above each group of small cams (72); a first wheel groove is provided inside the first wheel seat (73); a first contact wheel (74) is rotatably arranged in the first wheel groove; the wheel surfaces of the first contact wheel (74) and the small cam (72) are in conflict with each other; The synchronous drive structure (7) further comprises a lifting rod (75), a first tensioning spring (76), a baffle plate (77), a large gear (78) and a storage plate groove (79); the lifting rod (75) is vertically welded to the upper end of the first wheel seat (73); the first tensioning spring (76) is connected to the outer shell of the lifting rod (75); the first tensioning spring (76) is respectively fixed to the first wheel seat (73) and the bottom of the U-shaped dryer (10); the baffle plate (77) is welded to the upper end of the lifting rod (75); and the large gear (78) is sleeved on the connecting shaft (70); A U-shaped left chamber (12) is provided at the left side of the interior of the U-shaped dryer (10); the upper end of the U-shaped left chamber (12) is connected to a hot air flow pipe (11); the hot air flow pipe (11) extends to the outside of the spray drying cylinder (1) and is connected to a hot air appliance; a material storage tank (13) is provided at the bottom of the U-shaped left chamber (12); a discharge valve (14) is installed at the bottom of the material storage tank (13); a droplet retention chamber (9) is provided inside the U-shaped dryer (10) and is connected to the side of the U-shaped left chamber (12); the flow pipe (5) extends to the interior of the U-shaped dryer (10); and the flow pipe (5) is provided with a mist outlet (8) at the position of the droplet retention chamber (9); A multi-step stepped flow channel (15) is provided at a lower position inside the U-shaped dryer (10) and is connected to the U-shaped left chamber (12). The multi-step stepped flow channel (15) includes a plurality of groups of connected stepped units (16). Flow is blocked by baffles (77) between adjacent stepped units (16). A receiving plate groove (79) cooperating with the baffles (77) is provided at the bottom of each stepped unit (16). A U-shaped right chamber (17) connected to the multi-step stepped flow channel (15) is provided at a right position inside the U-shaped dryer (10). A quick discharge port (18) is provided at the bottom of the U-shaped right chamber (17). The top of the U-shaped right chamber (17) is connected to an exhaust pipe (19). A material blocking net is installed between the U-shaped right chamber (17) and the exhaust pipe (19).

2. A spray granulation drying device according to claim 1, characterized in that: A grinding chamber (33) is provided inside the grinding cylinder (32), a grinding base plate (34) is movably provided at the bottom of the grinding chamber (33), an annular material guide column (35) is provided in the middle of the grinding base plate (34), the annular material guide column (35) extends upward into the interior of the material discharge seat (31), filter holes (36) are evenly provided around the outer circle of the grinding base plate (34), and grinding balls (37) are movably provided on the filter holes (36).

3. A spray granulation drying device according to claim 2, characterized in that: A rotating rod (40) is welded to the middle position of the lower end of the grinding base plate (34); the bottom of the rotating rod (40) is fixed by means of a second bearing seat (41) and the middle position of the bottom of the aggregate seat (45); a first gear (42) is sleeved on the rotating rod (40); a second gear (43) is meshedly provided on one side of the first gear (42); the second gear (43) is sleeved on the output shaft of the uniform speed motor (44); and the uniform speed motor (44) and the second bearing seat (41) are fixed to each other.

4. A spray granulation drying device according to claim 3, characterized in that: An outer shell (50) is arranged outside the feed tube (21), and a large cam (51) is movably arranged inside the outer shell (50) at the right end. The large cam (51) is sleeved on a vertical camshaft (52), and the upper end of the vertical camshaft (52) is fixed to the outer shell (50) via a third bearing seat (53), and the lower end of the vertical camshaft (52) is connected to a first servo motor (54) via a coupling. A second wheel seat (55) is arranged on a horizontal side of the large cam (51), and a second wheel groove is provided inside the second wheel seat (55). A second contact wheel (56) is rotatably arranged in the second wheel groove and contacts the large cam (51).

5. A spray granulation drying device according to claim 4, characterized in that: A displacement rod (59) is welded to one end of the second wheel seat (55) away from the second contact wheel (56); a partition plate (57) is arranged inside the outer shell (50); a rod groove (58) is provided on the partition plate (57) for the displacement rod (59) to pass through; a second tensioning spring (60) is arranged between the second wheel seat (55) and the partition plate (57) and is sleeved on the outside of the displacement rod (59); a dredging seat (61) is arranged at the end of the displacement rod (59); two upper and lower rows of elastic dredging strips (62) are clamped on the dredging seat (61); the other end of the elastic dredging strip (62) is welded to the inner wall of the discharge pipe (21); and protrusions (63) are evenly distributed on the outer surface of the elastic dredging strip (62).

6. The process of a spray granulation drying device according to claim 5, characterized in that The specific steps include: S1: The slurry is injected into the atomizer (4) for atomization, and the atomized liquid droplets are injected downward from the flow tube (5) into the U-shaped dryer (10), and the atomized liquid droplets are dried through the cooperation of the U-shaped left chamber (12), the multi-step stepped flow channel (15) and the U-shaped right chamber (17) to form material particles, which are then injected into the receiving hopper (20); S2: When the receiving hopper (20) releases the material particles, the first servo motor (54) is started to drive the displacement rod (59) to move linearly in the direction of the lower material pipe (21), and the upper and lower rows of elastic dredging strips (62) are elastically bent upward and downward in the lower material pipe (21) respectively, so as to dredge the material particles blocked in the lower material pipe (21); S3: The fine material particles are blown down into the discharge seat (31), and then guided downward by the annular guide column (35) to evenly enter the grinding bottom plate (34) of the grinding cylinder (32). The entire grinding bottom plate (34) is driven to make a circular motion, and the grinding balls (37) roll. The fine material particles are fully ground by their own gravity and friction. Then the suction fan (47) is started to suck the material from the annular sealing groove through the suction pipe (46) and send it back into the mixing agitator (2).

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