Particle drying device for potassium nitrate production

Abstract

The utility model discloses a particle drying device for potassium nitrate production, which comprises a drying mechanism arranged in a granulation tower close to the bottom end, the top end of the granulation tower is provided with a feed pipe and a first exhaust pipe, and the side edge of the granulation tower is respectively provided with a cold air introduction pipe, a second exhaust pipe and a hot air introduction pipe from top to bottom. The bottom end of the granulation tower is provided with a discharge port, a collection hopper is arranged above the drying mechanism in the granulation tower, the drying mechanism comprises a plurality of drying discs, the plurality of drying discs are distributed at equal intervals from top to bottom, and the plurality of drying discs are mutually fixed through fixing strips. The cooled particles firstly fall into the collecting hopper and then fall into the drying disc, as the collecting hopper is arranged above the drying disc, the materials falling from the collecting hopper can fall into the side edge position of the drying disc, the positions of the collecting hopper and the drying disc are continuously changed in the rotating process of the drying disc, and the materials can fall into the drying disc dispersedly and are not easy to accumulate; and the materials are heated more uniformly, and the drying efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of potassium nitrate production, in particular to a particle drying device for potassium nitrate production. Background Art

[0002] The physical process of producing potassium nitrate granules by low tower granulation includes the following steps:

[0003] 1. Introduction of molten materials:

[0004] The molten potassium nitrate material is introduced into the top of the prilling tower through a feed pipe.

[0005] 2. Atomization and cooling:

[0006] The material is atomized into tiny droplets by the spray plate. When falling, these droplets encounter cold air introduced through the cold air inlet pipe, and are rapidly cooled and solidified to form small particles.

[0007] 3. Drying and curing:

[0008] The initially formed particles fall into the drying mechanism at the bottom of the tower and are dried by hot air introduced through the hot air inlet pipe to further remove residual moisture and completely solidify the particles.

[0009] 4. Collection and packaging:

[0010] The dried particles are discharged through the discharge port, collected and packaged to obtain finished potassium nitrate particles.

[0011] The drying mechanism in the prior art has the phenomenon of material accumulation. The material cannot be automatically and evenly spread inside the drying device, resulting in that heat cannot quickly reach the particles accumulated in the lower layer, making the drying efficiency low. In addition, the extrusion of the material will also cause adhesion between the particles, thereby affecting the quality of the product. Utility Model Content

[0012] In order to solve the problems mentioned in the above background technology, the utility model provides a particle drying device for potassium nitrate production.

[0013] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0014] A granule drying device for potassium nitrate production comprises a drying mechanism arranged near the bottom end of a granulation tower, characterized in that a feed pipe and a first exhaust pipe are arranged at the top of the granulation tower, a cold air inlet pipe, a second exhaust pipe and a hot air inlet pipe are respectively installed on the sides of the granulation tower from top to bottom, a discharge port is arranged at the bottom end of the granulation tower, a collecting hopper is arranged above the drying mechanism in the granulation tower, the drying mechanism comprises a plurality of drying plates, the plurality of drying plates are equidistantly distributed from top to bottom, and the plurality of drying plates are fixed to each other by fixing bars.

[0015] Preferably, the collecting hopper is located obliquely above the drying plate, and a supporting tube is fixed to the bottom end of the drying plate located at the bottom, and the supporting tube is installed in the granulation tower by rotating therebetween.

[0016] Preferably, a first bevel gear is fixed to the outside of the support tube, a second rotating motor is fixed to the outer wall of the granulation tower, a second bevel gear is fixed to the output shaft of the second rotating motor, and the first bevel gear and the second bevel gear are meshed with each other.

[0017] Preferably, the drying plate is provided with a plurality of fan-shaped openings, in which fan-shaped baffles are rotatably installed, and a vertical shaft is fixedly installed on the inner wall of the bottom end of the granulation tower, and the vertical shaft passes through the support tube and each drying plate.

[0018] Preferably, a second spur gear is fixed on the mounting shaft of the fan-shaped baffle, and the multiple second spur gears are meshed with each other in sequence. A third spur gear is coaxially fixed on one of the second spur gears, and the diameter of the third spur gear is larger than the diameter of the second spur gear. A second gear ring is fixed on the outside of the vertical axis at a position corresponding to each second spur gear, and the second gear ring is an incomplete gear ring, which meshes with the second spur gears accordingly.

[0019] Preferably, the meshing teeth on the second gear ring are continuously distributed in a half area of ​​the second gear ring, and from top to bottom, the meshing teeth on adjacent second gear rings are staggered.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. After cooling, the particles first fall into the collecting hopper and then into the drying plate. Since the collecting hopper is obliquely above the drying plate, the materials falling from the collecting hopper will fall on the side edge of the drying plate. During the rotation of the drying plate, the positions of the two will constantly change, and the materials will fall into the drying plate in a dispersed manner, which is not easy to accumulate, making the materials more evenly heated and the drying efficiency higher.

[0022] 2. Through the design of multi-layer drying plates, the particles in the drying plates will fall to the next layer during the rotation of the fan-shaped baffles. Since the meshing teeth on the second gear ring are continuously distributed on half of the second gear ring, and the meshing teeth on adjacent second gear rings are staggered from top to bottom, when the fan-shaped baffles on the upper layer rotate, the fan-shaped baffles on the lower layer remain horizontal, and the two rotate alternately, so that the particles can fall layer by layer. On the one hand, the residence time of the particles is increased, and on the other hand, the aggregation of the particles is reduced, which can effectively improve the drying effect of the drying mechanism, and there will be no adhesion between the particles, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is an overall schematic diagram of the utility model;

[0025] Figure 2 It is a three-dimensional cross-sectional view of a granulation tower of the utility model;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of the middle A position;

[0027] Figure 4 This is a cross-sectional view of the granulation tower of the utility model from the main perspective;

[0028] Figure 5 for Figure 4 Enlarged detail of position B in the middle;

[0029] Figure 6 This is an enlarged detail view of the hot air introduction pipe of the utility model;

[0030] Figure 7 It is a three-dimensional schematic diagram of the drying mechanism of the utility model;

[0031] Figure 8 This is an enlarged detail view of the drying mechanism of the utility model from the main perspective;

[0032] Fig. 9 This is a schematic diagram of the fan-shaped baffle in the drying plate of the utility model rotating to a vertical state;

[0033] Fig.10 This is a schematic diagram of the fan-shaped baffle in the drying plate of the utility model rotating to a horizontal state;

[0034] Fig.11 This is an enlarged detail diagram of the relative relationship between the collecting hopper and the drying mechanism of the utility model;

[0035] Fig.12 for Figure 1 Enlarged detail image of the middle C position;

[0036] Fig.13 It is a schematic diagram of the relative position relationship between the vertical axis and the fan-shaped baffle of the utility model;

[0037] Fig.14 It is a detailed diagram of the transmission of the vertical shaft and the fan-shaped baffle of the utility model;

[0038] Fig.15 for Fig.14 Enlarged detail image of the middle D position;

[0039] Fig.16 It is a top view of the transmission details of the vertical shaft and the fan-shaped baffle of the utility model;

[0040] Fig.17 for Fig.16 Enlarged detail image of position E in the middle;

[0041] In the figure: 1 granulation tower, 101 first exhaust pipe, 102 discharge port, 103 collecting hopper, 1031 unloading auger, 1032 scraper, 1033 first straight gear, 2 hot air blower, 3 air drying unit, 4 feeding pipe, 401 rotary joint, 402 spray disc, 403 first rotating motor, 404 second synchronous wheel, 405 first synchronous wheel, 406 synchronous belt, 5 hot air introduction pipe, 501 distribution elbow, 502 nozzle, 6 drying mechanism, 601 drying plate, 602 fixing bar, 603 supporting tube, 604 second rotating motor, 605 second bevel gear, 606 first bevel gear, 607 fan-shaped opening, 608 fan-shaped baffle, 6081 second spur gear, 6082 third spur gear, 7 second exhaust pipe, 8 cold air introduction pipe, 801 air outlet, 802 hood, 9 vertical shaft, 901 second gear ring, 10 ring track, 1001 first gear ring. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0043] Reference Figure 1-17A granule drying device for potassium nitrate production comprises a granulation tower 1, a hot air blower 2 and an air drying unit 3, a feed pipe 4 and a first exhaust pipe 101 are arranged at the top of the granulation tower 1, a cold air inlet pipe 8, a second exhaust pipe 7 and a hot air inlet pipe 5 are respectively installed on the sides of the granulation tower 1 from top to bottom, a discharge port 102 is arranged at the bottom of the granulation tower 1, a spray plate 402 is installed on the feed pipe 4, the first exhaust pipe 101 and the second exhaust pipe 7 are both connected to the air drying unit 3 through an insulation pipe, the air outlet end of the air drying unit 3 is transported to the hot air blower 2 through the insulation pipe, the hot air inlet pipe 5 is connected to the air outlet end of the hot air blower 2 through a pipe, and a drying mechanism 6 is arranged near the bottom end of the granulation tower 1;

[0044] The molten material is introduced into the top of the granulation tower 1 through the feed pipe 4 and sprayed out through the spray plate 402. In the process of falling, the material encounters the cold air introduced by the cold air introduction pipe 8 and is rapidly cooled and solidified to form small particles. The small particles fall into the drying mechanism 6 at the bottom of the tower and are dried by the hot air introduced by the hot air introduction pipe 5. Finally, the residual moisture is removed, thereby completing the granulation. The particles fall to the bottom of the tower and are discharged through the discharge port 102.

[0045] After the cold air exchanges heat with the material sprayed from the spray disk 402, its temperature rises rapidly, and the dried gas discharged from the second exhaust pipe 7 is still preheated. There is also a filtering mechanism in the first exhaust pipe 101 to prevent particles and dust from being sucked into the air drying unit 3. After the two are concentrated and passed into the air drying unit 3 for drying, they are sent to the hot air blower 2 for heating, and then used as drying gas again. This can effectively utilize the preheating of the two, which is more energy-saving and environmentally friendly. Example 2

[0046] Reference Figure 1-17 The difference between this embodiment and embodiment 1 is that the feed pipe 4 is connected to the spray disc 402 via a rotary joint 401, a first synchronous wheel 405 is fixed to the top of the spray disc 402, a first rotating motor 403 is fixed to the top of the granulation tower 1, an output end of the first rotating motor 403 extends into the granulation tower 1 and is fixed with a second synchronous wheel 404, and a synchronous belt 406 is sleeved between the first synchronous wheel 405 and the second synchronous wheel 404;

[0047] The first rotating motor 403 can drive the spray disc 402 to rotate at a high speed, thereby throwing out the material through centrifugal force to improve the atomization effect.

[0048] Among them, one end of the cold air inlet pipe 8 located inside the granulation tower 1 is bent in a ring shape, and a plurality of air outlets 801 are evenly distributed at the top of the cold air inlet pipe 8, which can improve the uniformity of the distribution of the ejected gas. A wind hood 802 is installed on the air outlet 801, and the wind hood 802 can further improve the dispersion of the gas, and the wind hood 802 can block the particles falling from above to prevent the particles from falling into the air outlet 801. Example 3

[0049] Reference Figure 1-17 The difference between this embodiment and embodiment 1 is that a collecting hopper 103 is provided above the drying mechanism 6 in the granulation tower 1, the drying mechanism 6 includes a plurality of drying plates 601, the plurality of drying plates 601 are equidistantly distributed from top to bottom, and the plurality of drying plates 601 are fixed to each other by fixing bars 602, the collecting hopper 103 is located obliquely above the drying plates 601, a supporting tube 603 is fixed to the bottom end of the lowest drying plate 601, and the supporting tube 603 is installed in the granulation tower 1 by rotating therebetween;

[0050] After cooling, the particles first fall into the collecting hopper 103 and then fall into the drying plate 601. Since the collecting hopper 103 is obliquely above the drying plate 601, the materials falling from the collecting hopper 103 will fall on the side edge of the drying plate 601. During the rotation of the drying plate 601, the positions of the two will constantly change, and the materials will fall into the drying plate 601 in a dispersed manner, and are not prone to accumulation, so that the materials are heated more evenly and the drying efficiency is higher.

[0051] Among them, a first bevel gear 606 is fixed to the outside of the support tube 603, a second rotating motor 604 is fixed to the outer wall of the granulation tower 1, a second bevel gear 605 is fixed to the output shaft of the second rotating motor 604, and the first bevel gear 606 and the second bevel gear 605 are meshed with each other;

[0052] In order to drive the drying plate 601 to rotate, the second rotating motor 604 is turned on to input power, and the drying plate 601 can be driven to rotate through the meshing of the first bevel gear 606 and the second bevel gear 605 . Example 4

[0053] Reference Figure 1-17 The difference between this embodiment and embodiment 3 is that a distribution elbow 501 is fixed on the hot air introduction pipe 5, the distribution elbow 501 corresponds to the drying plate 601 one by one, and a plurality of nozzles 502 are installed on the distribution elbow 501 at equal intervals, and the nozzles 502 are tilted downward toward the drying plate 601;

[0054] The distribution elbow 501 just surrounds the drying plate 601, and the two correspond one to one. During the rotation of the drying plate 601, the relative position of the two will be constantly changed, so that the hot air can be blown to the dried granular material without dead angles, effectively improving the drying effect. Example 5

[0055] Reference Figure 1-17 The difference between this embodiment and the embodiment 3 is that a circular track 10 is fixed to the top of the drying mechanism 6, a first gear ring 1001 is fixed inside the circular track 10, a material discharge auger 1031 is rotatably installed in the discharge port of the collecting hopper 103, the bottom end of the material discharge auger 1031 extends into the circular track 10 and is fixed with a first spur gear 1033, and the first spur gear 1033 is meshed with the first gear ring 1001;

[0056] When the drying plate 601 rotates, the annular track 10 and the first gear ring 1001 inside it will rotate with it, and then drive the unloading auger 1031 to rotate by the engagement of the spur gear 1033 with the first gear ring 1001. The unloading auger 1031 can clear the unloading port of the collecting hopper 103, so that the unloading of the collecting hopper 103 is more uniform and smooth.

[0057] A scraper 1032 is fixed to the top of the unloading auger 1031, and the scraper 1032 contacts the inner wall of the collecting hopper 103;

[0058] During the rotation process, the unloading auger 1031 will also drive the scraper 1032 to clean the inner wall of the collecting hopper 103, which can scrape off the sticky particles on the inner wall of the collecting hopper 103 and improve the cleanliness of the device. Example 6

[0059] Reference Figure 1-17 The difference between this embodiment and embodiment 3 is that the second exhaust pipe 7 extends to one end of the granulation tower 1 and is bent downward and faces the collecting hopper 103. A filter screen 702 is installed inside the collecting hopper 103.

[0060] The second exhaust pipe 7 can directly extract the hot air with residual heat after drying to prevent the hot air from moving upward and merging with the cold air to cause heat waste. The filter screen 702 can prevent the particles from being sucked into the collecting hopper 103. Example 7

[0061] Reference Figure 1-17 The difference between this embodiment and the embodiment 3 is that a plurality of fan-shaped openings 607 are provided on the drying plate 601, a fan-shaped baffle 608 is rotatably installed in the fan-shaped opening 607, a vertical shaft 9 is fixedly installed on the inner wall of the bottom end of the granulation tower 1, and the vertical shaft 9 passes through the support pipe 603 and each drying plate 601;

[0062] The vertical shaft 9 is fixed. When the drying plate 601 can rotate around the vertical shaft 9, a second spur gear 6081 is fixed on the mounting shaft of the sector baffle 608. The plurality of second spur gears 6081 mesh with each other in sequence. A third spur gear 6082 is coaxially fixed on one of the second spur gears 6081. The diameter of the third spur gear 6082 is larger than the diameter of the second spur gear 6081. A second toothed ring 901 is fixed on the outside of the vertical shaft 9 at a position corresponding to each second spur gear 6081. The second toothed ring 901 is an incomplete toothed ring. The second toothed ring 901 meshes with the second spur gear 6081 in correspondence. The vertical shaft 9 can drive the second toothed ring 901 to rotate. The meshing of the second toothed ring 901 and the third spur gear 6082 can drive one of the sector baffles 608 to rotate. The plurality of second spur gears 6081 mesh with each other in sequence. The second gear ring 901 can drive the remaining fan-shaped baffles 608 to rotate accordingly. Since the second gear ring 901 is an incomplete gear ring, it can drive the fan-shaped baffles 608 to rotate intermittently. Every time the second gear ring 901 rotates one circle, the fan-shaped baffles 608 rotate 360 ​​degrees. During the rotation of the fan-shaped baffles 608, the particles in the drying plate 601 will fall to the next layer. Since the meshing teeth on the second gear ring 901 are continuously distributed in a half area on the second gear ring 901, and from top to bottom, the meshing teeth on adjacent second gear rings 901 are staggered, when the fan-shaped baffles 608 on the upper layer rotate, the fan-shaped baffles 608 on the lower layer remain horizontal, and the two rotate alternately, so that the gaps between the particles can fall layer by layer. On the one hand, it increases the residence time of the particles, and on the other hand, it reduces the aggregation of the particles, which can effectively improve the drying effect of the drying mechanism 6.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A granule drying device for potassium nitrate production, comprising a drying mechanism (6) arranged near the bottom end of a granulation tower (1), characterized in that: The top of the granulation tower (1) is provided with a feed pipe (4) and a first exhaust pipe (101); the sides of the granulation tower (1) are respectively provided with a cold air introduction pipe (8), a second exhaust pipe (7) and a hot air introduction pipe (5) from top to bottom; the bottom of the granulation tower (1) is provided with a discharge port (102); a collecting hopper (103) is provided above the drying mechanism (6) in the granulation tower (1); the drying mechanism (6) comprises a plurality of drying trays (601); the plurality of drying trays (601) are equidistantly distributed from top to bottom, and the plurality of drying trays (601) are fixed to each other by fixing bars (602).

2. A particle drying device for potassium nitrate production according to claim 1, characterized in that: The collecting hopper (103) is located obliquely above the drying plate (601), and a support pipe (603) is fixed to the bottom end of the drying plate (601) located at the bottom, and the support pipe (603) is installed in the granulation tower (1) by rotating therebetween.

3. A particle drying device for potassium nitrate production according to claim 2, characterized in that: A first bevel gear (606) is fixed to the outside of the support tube (603), a second rotating motor (604) is fixed to the outer wall of the granulation tower (1), a second bevel gear (605) is fixed to the output shaft of the second rotating motor (604), and the first bevel gear (606) and the second bevel gear (605) are meshed with each other.

4. A particle drying device for potassium nitrate production according to claim 1, characterized in that: The drying plate (601) is provided with a plurality of fan-shaped openings (607), and a fan-shaped baffle (608) is rotatably mounted in the fan-shaped openings (607). A vertical shaft (9) is fixedly mounted on the inner wall of the bottom end of the granulation tower (1), and the vertical shaft (9) passes through the support tube (603) and each drying plate (601).

5. A particle drying device for potassium nitrate production according to claim 4, characterized in that: A second spur gear (6081) is fixed on the mounting shaft of the sector baffle (608), and the plurality of second spur gears (6081) are meshed with each other in sequence. A third spur gear (6082) is coaxially fixed on one of the second spur gears (6081), and the diameter of the third spur gear (6082) is greater than the diameter of the second spur gear (6081). A second toothed ring (901) is fixed on the outside of the vertical shaft (9) at a position corresponding to each second spur gear (6081), and the second toothed ring (901) is an incomplete toothed ring, and the second toothed ring (901) is meshed with the second spur gear (6081) in correspondence.

6. A particle drying device for potassium nitrate production according to claim 5, characterized in that: The meshing teeth on the second gear ring (901) are continuously distributed over a half area of ​​the second gear ring (901), and from top to bottom, the meshing teeth on adjacent second gear rings (901) are staggered.

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