Granulation tower for potassium nitrate production
By designing a multi-layer drying tray and hot air circulation system in potassium nitrate production, and using the air drying unit to recover waste heat, the problems of heat waste and high energy consumption in the prior art are solved, and the drying efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421673639.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the existing potassium nitrate production technology, the exhaust gas of cold and hot gas is directly discharged, resulting in waste of heat, high energy consumption, and low drying efficiency.
A granulation tower for potassium nitrate production was designed, and a multi-layer drying tray was designed with an effective circulation of hot air. The air drying unit was used to recover and reheat the waste heat, and heat loss was reduced through the insulation pipe.
It improves drying efficiency and product quality, effectively reduces energy consumption, improves energy utilization, reduces heat loss, and achieves more efficient production of potassium nitrate granules.
Smart Images
Figure CN222855327U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of potassium nitrate production, in particular to a granulating tower 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 tower body through the 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] In the prior art, both the cold air that exchanges heat with the material and the hot air used in the drying and curing process have some residual heat. After use in the prior art, they are directly discharged as exhaust gas, resulting in heat waste, high energy consumption in the production process, and insufficient energy conservation and environmental protection. Utility Model Content
[0012] In order to solve the problems mentioned in the above background technology, the utility model provides a granulation tower for potassium nitrate production.
[0013] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0014] A granulation tower for potassium nitrate production, comprising a tower body, a hot air blower and an air drying unit, characterized in that: a feed pipe and a first exhaust pipe are arranged at the top of the tower body, a cold air inlet pipe, a second exhaust pipe and a hot air inlet pipe are respectively installed on the sides of the tower body from top to bottom, a discharge port is arranged at the bottom of the tower body, a spray plate is installed on the feed pipe, the first exhaust pipe and the second exhaust pipe are both connected to the air drying unit through an insulation pipe, an air outlet end of the air drying unit is transported to the hot air blower through the insulation pipe, the hot air inlet pipe is connected to the air outlet end of the hot air blower through a pipe, and a drying mechanism is arranged near the bottom end of the tower body;
[0015] The feed pipe is connected to the spray disc via a rotary joint, a first synchronous wheel is fixed to the top of the spray disc, a first rotating motor is fixed to the top of the tower body, an output end of the first rotating motor extends into the tower body and is fixed to a second synchronous wheel, and a synchronous belt is sleeved between the first synchronous wheel and the second synchronous wheel.
[0016] Preferably, one end of the cold air inlet pipe located inside the tower body is bent into a ring shape, and a plurality of air outlets are evenly distributed at the top of the cold air inlet pipe, and a wind hood is installed on the air outlet.
[0017] Preferably, a collecting hopper is provided in the tower body above the drying mechanism, the drying mechanism comprises a plurality of drying trays, the plurality of drying trays are equidistantly distributed from top to bottom, and the plurality of drying trays are fixed to each other by fixing bars, the collecting hopper is located obliquely above the drying tray, a supporting tube is fixed to the bottom end of the lowest drying tray, and the supporting tube is rotatably installed in the tower body.
[0018] 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 tower body, 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.
[0019] Preferably, a distribution elbow is fixed on the hot air introduction pipe, the distribution elbow corresponds to the drying plate one by one, and a plurality of nozzles are installed on the distribution elbow at equal intervals, and the nozzles are inclined downward toward the drying plate.
[0020] Preferably, the second exhaust pipe extends to one end of the tower body and is bent downward and directly faces the collecting hopper, and a filter is installed inside the collecting hopper.
[0021] Compared with the prior art, the beneficial effects of the utility model are:
[0022] The molten material is evenly sprayed out through the spray plate, and quickly heat-exchanges with the cold air to solidify into particles, and then is dried step by step on the multi-layer drying plate to ensure that the material is heated evenly and improve the drying efficiency and quality. The drying mechanism adopts a multi-layer drying plate design, combined with the effective circulation of hot air, so that the residual moisture in the particles is completely removed, ensuring the dryness and quality of the final product.
[0023] The system makes full use of the waste heat in the hot air inlet pipe and exhaust pipe, recovers it through the air drying unit and reheats it for utilization, effectively reducing energy consumption and improving energy utilization. The use of insulated pipes reduces heat loss during transmission, further enhancing the energy-saving effect of the system.
[0024] 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 heated more evenly and the drying efficiency higher.
[0025] The first rotating motor can drive the spray disc to rotate at a high speed, thereby throwing the material out through centrifugal force to improve the atomization effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] 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.
[0027] Figure 1 It is an overall schematic diagram of the utility model;
[0028] Figure 2 It is a three-dimensional cross-sectional view of the tower body of the utility model;
[0029] Figure 3 for Figure 2 A magnified schematic diagram of the middle A position;
[0030] Figure 4 This is a sectional view of the tower body of the utility model from the main perspective;
[0031] Figure 5 for Figure 4 Enlarged detail of position B in the middle;
[0032] Figure 6 This is an enlarged detail view of the hot air introduction pipe of the utility model;
[0033] Figure 7 It is a three-dimensional schematic diagram of the drying mechanism of the utility model;
[0034] Figure 8 This is an enlarged detail view of the drying mechanism of the utility model from the main perspective;
[0035] Fig. 9This is a schematic diagram of the fan-shaped baffle in the drying plate of the utility model rotating to a vertical state;
[0036] 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;
[0037] Fig.11 This is an enlarged detail diagram of the relative relationship between the collecting hopper and the drying mechanism of the utility model;
[0038] Fig.12 for Figure 1 Enlarged detail image of the middle C position;
[0039] 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;
[0040] Fig.14 It is a detailed diagram of the transmission of the vertical shaft and the fan-shaped baffle of the utility model;
[0041] Fig.15 for Fig.14 Enlarged detail image of the middle D position;
[0042] Fig.16 It is a top view of the transmission details of the vertical shaft and the fan-shaped baffle of the utility model;
[0043] Fig.17 for Fig.16 Enlarged detail image of position E in the middle;
[0044] In the figure: 1 tower body, 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 feed 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
[0045] 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
[0046] Reference Figure 1-17 A granulation tower for potassium nitrate production comprises a tower body 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 tower body 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 tower body 1 from top to bottom, a discharge port 102 is arranged at the bottom of the tower body 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 tower body 1;
[0047] The molten material is introduced into the top of the tower body 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.
[0048] 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
[0049] 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 tower body 1, an output end of the first rotating motor 403 extends into the tower body 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;
[0050] 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.
[0051] Among them, one end of the cold air inlet pipe 8 located inside the tower body 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
[0052] 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 tower body 1, the drying mechanism 6 includes a plurality of drying trays 601, the plurality of drying trays 601 are evenly spaced from top to bottom, and the plurality of drying trays 601 are fixed to each other by fixing bars 602, the collecting hopper 103 is located obliquely above the drying trays 601, a supporting tube 603 is fixed to the bottom end of the drying tray 601 located at the bottom, and the supporting tube 603 is rotatably installed in the tower body 1;
[0053] 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.
[0054] 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 tower body 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;
[0055] 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
[0056] 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;
[0057] 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
[0058] 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;
[0059] 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.
[0060] 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;
[0061] 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
[0062] 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 tower body 1 and is bent downward and faces the collecting hopper 103. A filter screen 702 is installed inside the collecting hopper 103.
[0063] 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
[0064] 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 tower body 1, and the vertical shaft 9 passes through the support tube 603 and each drying plate 601;
[0065] 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.
[0066] 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.
[0067] 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.
[0068] 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.
[0069] 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 granulation tower for potassium nitrate production, comprising a tower body (1), a hot air blower (2) and an air drying unit (3), characterized in that: The top of the tower body (1) is provided with a feed pipe (4) and a first exhaust pipe (101); the sides of the tower body (1) are respectively provided with a cold air inlet pipe (8), a second exhaust pipe (7) and a hot air inlet pipe (5) from top to bottom; the bottom of the tower body (1) is provided with a discharge port (102); the feed pipe (4) is provided with a spray plate (402); 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 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 of the hot air blower (2) through a pipe; and a drying mechanism (6) is provided near the bottom of the tower body (1); 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 tower body (1); an output end of the first rotating motor (403) extends into the tower body (1) and is fixed with a second synchronous wheel (404); a synchronous belt (406) is sleeved between the first synchronous wheel (405) and the second synchronous wheel (404).
2. A granulating tower for potassium nitrate production according to claim 1, characterized in that: One end of the cold air introduction pipe (8) located inside the tower body (1) is bent into a ring shape, and a plurality of air outlets (801) are evenly distributed at the top of the cold air introduction pipe (8), and a wind cap (802) is installed on the air outlet (801).
3. A granulating tower for potassium nitrate production according to claim 1, characterized in that: A collecting hopper (103) is provided in the tower body (1) above the drying mechanism (6). The drying mechanism (6) comprises a plurality of drying trays (601), the plurality of drying trays (601) are evenly spaced from top to bottom, and the plurality of drying trays (601) are fixed to each other via fixing bars (602). The collecting hopper (103) is located obliquely above the drying trays (601), and a support tube (603) is fixed to the bottom end of the drying tray (601) located at the bottom, and the support tube (603) is rotatably mounted in the tower body (1).
4. A granulation tower for potassium nitrate production according to claim 3, 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 tower body (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.
5. A granulation tower for potassium nitrate production according to claim 3, characterized in 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, the nozzles (502) are tilted downward toward the drying plate (601).
6. A granulation tower for potassium nitrate production according to claim 3, characterized in that: The second exhaust pipe (7) extends to one end of the tower body (1), is bent downward, and is directly opposite to the collecting hopper (103). A filter screen (702) is installed inside the collecting hopper (103).