A granulation system for high-tower melt high-phosphorus compound fertilizer

Abstract

A granulation system for a high-tower melt high-phosphorus compound fertilizer relates to the technical field of fertilizer production, and comprises a melting device, a primary mixing device, a secondary mixing device and a granulation device which are arranged in sequence, and also comprises a primary ball milling device arranged between the primary mixing device and the secondary mixing device, an emulsifying device arranged between the secondary mixing device and the granulation device, and a secondary ball milling device arranged between the secondary mixing device and the emulsifying device. The melting device, the primary mixing device, the primary ball milling device, the secondary mixing device, the secondary ball milling device, the emulsifying device and the granulation device are arranged in a stepped manner from high to low. The device has stable operation and high working efficiency, and effectively meets the production requirements of compound fertilizers with high-phosphorus and high-potassium formulas.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer production, in particular to a granulation system for a high-tower melt high-phosphorus compound fertilizer. Background Art

[0002] The high-tower melt granulation compound fertilizer process is widely used in my country's compound fertilizer industry for its round particles, bright color, uniform nutrients, rapid dissolution, low cost, high output-capacity ratio, and energy saving.

[0003] At present, my country's production capacity of high-tower melt granulation compound fertilizer has reached nearly 15 million tons, making it the world's largest producer of high-tower compound fertilizers, with production and sales exceeding 10 million tons, accounting for nearly 50% of my country's compound fertilizer production and sales. Moreover, due to the advanced technology and high return on investment, domestic compound fertilizer manufacturers are actively building new high-tower compound fertilizer projects in recent years. It is expected that my country's production capacity of high-tower melt granulation compound fertilizers will reach or exceed 20 million tons in the next few years.

[0004] However, the current product formula of my country's high-tower melt granulation compound fertilizer is mainly high-nitrogen compound fertilizer. Since high-tower melt granulation compound fertilizer is made of urine formed by melting urea, and then granulated with ammonium phosphate, potassium chloride, and potassium sulfate to make a slurry, and since ammonium phosphate salt is viscous and not easy to blend with urine, the high-tower process for manufacturing high-phosphorus formula compound fertilizer has become a difficult problem for the entire high-tower compound fertilizer industry, and also restricts the application of high-tower compound fertilizer in various crops. There are many crops that require high-phosphorus formula fertilizers, which the high-tower melt granulation process cannot solve. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a high-tower melt high-phosphorus compound fertilizer granulation system, which has stable operation and high working efficiency and effectively meets the production demand of compound fertilizer with high phosphorus and high potassium formula.

[0006] The technical solution adopted by the present invention is to provide a granulation system for a high-tower melt high-phosphorus compound fertilizer, comprising a melting device, a primary mixing device, a secondary mixing device and a granulation device which are arranged in sequence, and also comprising a primary ball milling device arranged between the primary mixing device and the secondary mixing device, an emulsifying device arranged between the secondary mixing device and the granulation device, and a secondary ball milling device arranged between the secondary mixing device and the emulsifying device. The melting device, the primary mixing device, the primary ball milling device, the secondary mixing device, the secondary ball milling device, the emulsifying device and the granulation device are arranged in a stepped manner from high to low.

[0007] The emulsifying device comprises an emulsifying motor, a transmission shaft, an emulsifying shell with a feed port and a discharge port, an emulsifying fixed cylinder arranged in the emulsifying shell, and an emulsifying rotating cylinder arranged in the emulsifying fixed cylinder. One end of the transmission shaft is transmission-connected to the emulsifying motor by means of a coupling, and the other end passes through the emulsifying shell, the emulsifying fixed cylinder and is transmission-connected to the emulsifying rotating cylinder. The feed port is arranged at the outside of the emulsifying shell, and the discharge port is arranged at the lower end of the emulsifying shell. The emulsifying fixed cylinder is in a barrel-shaped structure with an opening arranged toward the feed port. The emulsifying rotating cylinder is in a cylindrical frame structure and has the freedom of rotation driven by the emulsifying motor.

[0008] The emulsifying drum comprises a first fixed plate and a second fixed plate which are arranged correspondingly and have axial holes, and a strip plate arranged between the first fixed plate and the second fixed plate, wherein the first fixed plate is provided with a plurality of through holes and is arranged toward the feed inlet, and the strip plates are arranged in a circular array along the edge of a side opposite to the first fixed plate and the second fixed plate, and the outer side of the strip plates is an arc surface and is in the same plane as the outer periphery of the first fixed plate and the second fixed plate;

[0009] A plurality of through holes are arranged on the outer peripheral surface of the emulsifying fixed cylinder, and the opening of the emulsifying fixed cylinder facing the feed inlet is larger than the diameter of the feed inlet.

[0010] A lubrication structure is provided between the emulsification housing and the emulsification motor, and a sealing structure is provided between the emulsification housing and the transmission shaft. The lubrication structure includes a lubrication cylinder filled with lubricating oil and shaft seats provided at both ends of the lubrication cylinder. The lubrication cylinder is sealed by means of the shaft seats, and the transmission shaft passes through the inner cavity of the lubrication cylinder by means of the shaft seats.

[0011] The sealing structure includes a sealing cylinder, a sealing filler arranged in the sealing cylinder and a sealing disk for sealing the sealing cylinder. The sealing cylinder is arranged on the axial hole of the emulsifying shell and the transmission shaft passes through the sealing cylinder. The sealing filler is arranged between the sealing cylinder and the transmission shaft. The sealing disk is provided with an annular boss on the side opposite to the sealing cylinder, and the boss is embedded between the sealing cylinder and the transmission shaft and pressed tightly against the sealing filler.

[0012] The secondary ball mill device comprises a bracket, a secondary ball mill transmission shaft, a secondary ball mill motor arranged at the upper end of the bracket, a secondary ball mill shell arranged at the lower end of the bracket, a secondary ball mill drum arranged in the secondary ball mill shell and secondary grinding balls arranged in the secondary ball mill drum, one end of the secondary ball mill transmission shaft is transmission connected to the secondary ball mill motor by means of a coupling, and the other end passes downward through the secondary ball mill shell and is transmission connected to the secondary ball mill drum, one side of the secondary ball mill shell is provided with a feed port, and the other side is provided with a discharge port, the upper end of the secondary ball mill drum is transmission connected to the secondary ball mill transmission shaft, and the lower end is provided with a rotating shaft and is rotationally connected to the bottom of the secondary ball mill shell.

[0013] The height of the discharge port is higher than that of the feed port, a secondary ball mill feed pipe is arranged on the feed port, and the outer end of the secondary ball mill feed pipe is arranged to be inclined upward, the discharge port is provided with a secondary ball mill discharge pipe, and the outer side of the secondary ball mill discharge pipe is arranged to be inclined downward, the secondary grinding balls include large balls, medium balls and small balls, the diameter of the large balls is larger than that of the medium balls and the number of the large balls is smaller than that of the medium balls, the diameter of the medium balls is larger than that of the small balls and the number of the medium balls is smaller than that of the small balls, and the diameter of the small balls is larger than the diameter of the through holes on the secondary ball mill drum (22).

[0014] The bracket includes an upper plate, a middle plate with a through hole in the middle, a triangular plate uprightly arranged on the upper end surface and / or lower end surface of the middle plate, a column arranged at the lower end of the middle plate and a support column arranged on the middle plate, the upper end of the support column is fixed to the upper plate, and the lower end passes through the middle plate and is downwardly fixed to the upper end of the secondary ball mill shell, the support column and the triangular plate are arranged around the through hole array of the middle plate, the triangular plate is a right-angled triangle structure, and the right-angled side on the inner side of the triangular plate is fixed to the outer side of the support column, and the right-angled side at the lower end is fixed to the middle plate, a secondary ball mill motor is fixed to the upper end of the upper plate, the output end of the secondary ball mill motor vertically passes through the upper plate and the middle plate and is transmission-connected to the secondary ball mill shell, and the column is arranged at the lower end of the middle plate and is located on the outside of the support column and the secondary ball mill shell.

[0015] The primary ball mill device comprises a fixed frame, a primary ball mill motor arranged at the upper end of the fixed frame, a primary ball mill transmission shaft, a primary ball mill shell arranged at the lower end of the fixed frame, a primary ball mill drum arranged in the primary ball mill shell and a ball mill stirring paddle arranged in the primary ball mill drum, one end of the primary ball mill transmission shaft passes through the primary ball mill shell and extends into the primary ball mill drum and is provided with primary ball mill blades on the outer periphery, the other end extends upward and is connected to the output end of the primary ball mill motor by means of a coupling, a feed port is arranged on one side of the primary ball mill shell and is connected to a primary ball mill feed pipe inclined upward, and a discharge port is arranged at the lower end, the primary ball mill blades are annular plate-shaped structure and primary grinding balls are arranged between the primary ball mill blades, the primary ball mill blades are provided with multiple groups and the diameter of the primary grinding balls between adjacent primary ball mill blades decreases layer by layer from top to bottom.

[0016] The melting device comprises a melting shell, a melting motor arranged at the upper end of the melting shell, a melting stirring paddle arranged in the melting shell, a first melting heating coil arranged on the outer periphery of the melting shell, and a second melting heating coil arranged in the melting shell. The melting shell is provided with a feed inlet at the upper end and a discharge outlet at the upper part of one side. The melting stirring paddle comprises a transmission shaft and a melting blade arranged on the transmission shaft. The melting blades are three-blade stirring paddles and single / double-belt stirring paddles arranged on the transmission shaft in sequence from top to bottom. The upper end of the transmission shaft extends out of the melting shell and is transmission-connected to the melting motor. The first melting heating coil is spirally wound on the outer periphery of the melting shell. The second melting heating coil is a multi-layer coil and is arranged between the melting stirring paddle and the inner wall of the melting shell and is provided with a filter.

[0017] The primary mixing device includes a primary mixing shell, a primary mixing motor arranged at the upper end of the primary mixing shell, a first mixing heating coil arranged on the outer periphery of the primary mixing shell, a second mixing heating coil arranged in the primary mixing shell and a primary mixing stirring paddle arranged in the primary mixing shell, the upper end of the primary mixing shell is provided with a feed inlet, and the upper part of one side is provided with a discharge port, the first mixing heating coil is spirally wound on the outer periphery of the primary mixing shell, the primary mixing stirring paddle includes a transmission shaft and a primary mixing blade arranged on the transmission shaft, the primary mixing blade is a single / double spiral belt stirring blade, the second mixing heating coil is a multi-layer spiral coil structure, the second mixing heating coil is arranged between the primary mixing blade and the inner wall of the primary mixing shell and is provided with a filter screen, and the secondary mixing device has the same structure as the primary mixing device.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention adds a primary ball milling device between the primary mixing device and the secondary mixing device, and ball mills the slurry mixed by the primary mixing device to increase the mixing uniformity and fineness of the slurry. A secondary ball milling device and an emulsifying device are added between the secondary mixing device and the granulator. The secondary ball milling device performs secondary ball milling on the slurry mixed by the secondary mixing device to increase the mixing uniformity and fineness of the slurry again. The slurry is emulsified in the emulsifying device to further increase the uniformity and fineness of the slurry, and the strength and uniformity of the fertilizer particles granulated by the granulating device are significantly improved.

[0020] 2. In the emulsifying device, the transmission shaft and the emulsifying shell are sealed by a sealing structure to effectively prevent leakage. The transmission shaft is lubricated and cooled by a lubricating structure to reduce the wear of the transmission shaft and increase its service life. An emulsifying fixed cylinder is added in the emulsifying shell as a stator. The outer periphery and the front end of the stator are provided with through holes for the entry and exit of the slurry. The emulsifying drum is a rotor of a frame structure. The strips of the emulsifying drum can quickly cut the slurry when rotating, fully grind and stir the slurry, and increase the processing efficiency. At the same time, according to the number of strips set and the adjustment of the speed, the emulsification fineness can be effectively adjusted. The device is flexible to use and has high emulsification fineness. The distance between the emulsifying drum and the emulsifying fixed cylinder can further adjust the emulsification fineness. The outer side surface of the strips is an arc surface and is in the same plane as the outer periphery of the first fixed disk and the second fixed disk, which reduces the resistance of the rotor when rotating, so as to increase the upper limit of the speed. In actual processing, the processing efficiency and emulsification fineness are significantly improved.

[0021] 3. The secondary ball mill is a vertical structure. The column is used to fix it on the ground or platform. Compared with the traditional horizontal ball mill, it is more stable in operation. The bracket is used to support and fix the secondary ball mill motor and to fix the overall structure, further increasing the operating stability. The upper and lower ends of the secondary ball mill drum are provided with a transmission shaft and a rotating shaft for limiting and supporting, further improving the stability during rotation. There are secondary grinding balls of different sizes in the secondary ball mill drum, which improves the ball milling efficiency and fineness.

[0022] 4. The primary ball mill is a vertical structure. The inclined primary ball mill feed pipe is convenient for feeding. The multi-layer primary grinding blades and the primary grinding balls with decreasing diameters gradually stir and grind the slurry, ensuring the uniformity and fineness of the slurry. The fineness increases layer by layer, reducing the wear of the primary ball mill and the ball milling pressure.

[0023] 5. The double heating coils of the melting device perform bidirectional heating with high heating efficiency. The first melting heating coil outside the melting shell can heat the melting shell to avoid the problem that the melting efficiency of some materials close to the melting shell is low or even cannot be completely melted when the material enters the melting shell, which easily causes the particles to be in a semi-molten state and adhere to the melting shell. The second melting heating coil is a multi-layer spiral coil. When the material enters the melting shell, it falls on the second melting heating coil and is heated and melted to become slurry. The slurry is filtered by the filter and enters the vicinity of the stirring paddle. The melting paddle adopts a double blade, the upper part is a three-blade stirring blade, and the lower part is a single / double-spiral stirring blade. The single / double-spiral stirring blade cuts the slurry vertically and lifts and stirs the slurry. The three-blade stirring blade cuts the slurry horizontally, and the material is discharged from the discharge port on the upper outer side of the melting shell after passing through the three-blade stirring blade, thereby ensuring the uniformity and fineness of the slurry and the processing efficiency.

[0024] 6. Add new materials to the primary mixing device and mix and stir with the slurry. The first mixing heating coil heats the primary mixing shell to avoid the problem of low melting efficiency or even incomplete melting of some materials close to the primary mixing shell when the newly added materials enter the primary mixing shell. After the newly added materials are melted, they pass through the filter screen and enter the vicinity of the primary mixing blades. The primary mixing blades are single / double-ribbon stirring blades, which stir, cut and lift the slurry to ensure the mixing uniformity and fineness of the slurry. The slurry is discharged from the discharge port on the upper side of one side of the primary mixing shell as the primary mixing blades lift the slurry.

[0025] 7. The primary ball mill, secondary ball mill and emulsifier are used to stir and refine the slurry step by step. The operation time of each device is about 30 seconds. The uniformity and fineness of the slurry are significantly improved, while the processing time is only increased by less than two minutes. If only one grinding device is added, it is difficult to meet the processing time and processing accuracy at the same time. This system effectively meets the production needs of high-quality fertilizers. After the processed slurry is granulated, the particles have high strength, round and smooth surface, and consistent color depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 is a schematic diagram of the structure of an emulsification device;

[0028] Figure 3 yes Figure 2 A magnified view of middle;

[0029] Figure 4 1. It is a schematic diagram of the structure of the emulsifying drum;

[0030] Figure 5 This is a schematic diagram of the emulsification fixed cylinder structure;

[0031] Figure 6 It is a schematic diagram of the structure of the secondary ball milling device;

[0032] Figure 7 It is a schematic diagram of the structure of a primary ball mill;

[0033] Figure 8 is a schematic diagram of the structure of the melting device;

[0034] Fig. 9 It is a schematic diagram of a primary mixing device.

[0035] In the accompanying drawings, 1, melting device, 2, primary mixing device, 3, secondary mixing device, 4, primary ball milling device, 5, emulsifying device, 6, secondary ball milling device, 7, emulsifying motor, 8, emulsifying shell, 9, emulsifying fixed cylinder, 10, emulsifying rotating cylinder, 11, first fixed disk, 12, second fixed disk, 13, strip plate, 14, lubricating cylinder, 15, sealing cylinder, 16, sealing packing, 17, sealing disk, 18, boss, 19, bracket, 20, secondary ball milling motor, 21, secondary ball milling shell, 22, secondary ball milling rotating cylinder, 23, secondary grinding balls, 24, secondary ball milling feed pipe, 25, Secondary ball mill discharge pipe, 26, upper plate, 27, middle plate, 28, triangular plate, 29, column, 30, support column, 31, fixed frame, 32, primary ball mill motor, 33, primary ball mill shell, 34, primary ball mill drum, 35, primary ball mill blades, 36, primary grinding balls, 37, melting shell, 38, melting motor, 39, first melting heating coil, 40, second melting heating coil, 41, melting blades, 42, primary mixing shell, 43, primary mixing motor, 44, first mixing heating coil, 45, second mixing heating coil, 46, primary mixing blades. DETAILED DESCRIPTION

[0036] like Figure 1-9 As shown, the present invention provides a granulation system for a high-tower melt high-phosphorus compound fertilizer, comprising a melting device 1, a primary mixing device 2, a secondary mixing device 3 and a granulating device which are arranged in sequence, and also comprising a primary ball milling device 4 arranged between the primary mixing device 2 and the secondary mixing device 3, an emulsifying device 5 arranged between the secondary mixing device 3 and the granulating device, and a secondary ball milling device 6 arranged between the secondary mixing device 3 and the emulsifying device 5. The melting device 1, the primary mixing device 2, the primary ball milling device 4, the secondary mixing device 3, the secondary ball milling device 6, the emulsifying device 5 and the granulating device are arranged in a stepped manner from high to low.

[0037] During processing in the primary mixing device 2 and the secondary mixing device 3, other materials are added for matching. The primary ball mill 4 processes the material slurry after the primary mixing device 2 to improve its uniformity and fineness. The secondary ball mill 6 processes the slurry after the secondary mixing device 3 to improve its uniformity and fineness. The emulsifying device 5 further refines the material slurry to further improve its uniformity. After the material slurry is granulated by the granulating device, the particle strength is significantly high, the surface is round and smooth, the particle color is consistent, and the particle size difference is small.

[0038] like Figure 2-3As shown, the emulsifying device 5 includes an emulsifying motor 7, a transmission shaft, an emulsifying shell 8 with a feed port and a discharge port, an emulsifying fixed cylinder 9 arranged in the emulsifying shell 8, and an emulsifying rotating cylinder 10 arranged in the emulsifying fixed cylinder 9. One end of the transmission shaft is connected to the emulsifying motor 7 by means of a coupling, and the other end passes through the emulsifying shell 8 and the emulsifying fixed cylinder 9 and is connected to the emulsifying rotating cylinder 10. The feed port is arranged on the outside of the emulsifying shell 8, and the discharge port is arranged at the lower end of the emulsifying shell 8. The emulsifying fixed cylinder 9 is a barrel-shaped structure with an opening arranged toward the feed port. The emulsifying rotating cylinder 10 is a cylindrical frame structure and has the freedom of rotation driven by the emulsifying motor 7.

[0039] The emulsifying motor 7 drives the emulsifying drum 10 to rotate through the transmission shaft. The emulsifying drum 10 rotates at high speed. The slurry is rotated between the emulsifying fixed drum 9 and the emulsifying drum 10 under the action of centrifugal force. The emulsifying fixed drum 9 and the emulsifying drum 10 fully grind the slurry, and the emulsifying drum 10 with a cylindrical frame structure cuts the slurry.

[0040] like Figure 4-5 As shown, the emulsifying drum 10 includes a first fixed disk 11 and a second fixed disk 12 which are arranged correspondingly and have axial holes, and a strip plate 13 which is arranged between the first fixed disk 11 and the second fixed disk 12. The first fixed disk 11 is provided with a plurality of through holes and is arranged toward the feed port. The strip plates 13 are arranged in a circular array along the edge of a side opposite to the first fixed disk 11 and the second fixed disk 12. The outer side of the strip plates 13 is an arc surface and is in the same plane as the outer periphery of the first fixed disk 11 and the second fixed disk 12.

[0041] The outer peripheral surface of the emulsifying fixed cylinder 9 is provided with a plurality of through holes, and the opening of the emulsifying fixed cylinder 9 facing the feed inlet is larger than the diameter of the feed inlet.

[0042] The slurry enters from the feed port, part of which enters the emulsifying drum 10 through the through hole on the first fixed disk 11, and the other part of the slurry flows into the space between the emulsifying fixed drum 9 and the emulsifying drum 10. As the emulsifying drum 10 rotates at a high speed, the two parts of the slurry are mixed with each other and are simultaneously ground by the emulsifying fixed drum 9 and the emulsifying drum 10, and cut by the strip plate 13. Moreover, part of the slurry is thrown outward from the through hole of the emulsifying fixed drum 9 under the action of centrifugal force, hits the emulsifying shell 8, and then falls back between the emulsifying fixed drum 9 and the emulsifying drum 10 to be mixed and ground again. This structure has high efficiency, high fineness, and short processing time.

[0043] like Figure 2-3As shown, a lubrication structure is arranged between the emulsification shell 8 and the emulsification motor 7, and a sealing structure is arranged between the emulsification shell 8 and the transmission shaft. The lubrication structure includes a lubrication cylinder 14 filled with lubricating oil and shaft seats arranged at both ends of the lubrication cylinder 14. The lubrication cylinder 14 is sealed with the help of the shaft seats and the transmission shaft passes through the inner cavity of the lubrication cylinder 14 with the help of the shaft seats; the lubrication structure can effectively lubricate the transmission shaft and can also play a role in cooling down.

[0044] The sealing structure includes a sealing cylinder 15, a sealing filler 16 arranged in the sealing cylinder 15, and a sealing disk 17 for sealing the sealing cylinder 15. The sealing cylinder 15 is arranged on the axial hole of the emulsifying shell 8 and the transmission shaft passes through the sealing cylinder 15. The sealing filler 16 is arranged between the sealing cylinder 15 and the transmission shaft. The sealing disk 17 is provided with an annular boss 18 on the side opposite to the sealing cylinder 15, and the boss 18 is embedded between the sealing cylinder 15 and the transmission shaft and is tightly pressed against the sealing filler 16.

[0045] The inner diameter of the sealing cylinder 15 is larger than the inner diameter of the shaft hole on the emulsifying shell 8. One end of the sealing cylinder 15 is fixed on the emulsifying shell 8 and covers the shaft hole. After the transmission shaft is inserted, the sealing packing 16 is embedded and sealed with a sealing disk 17. The boss 18 of the sealing disk 17 is embedded in the sealing cylinder 15 to tighten the sealing packing 16 to achieve effective sealing. At the same time, the sealing packing 16 will wear after long-term use, resulting in reduced sealing effect. It only needs to disassemble and assemble the sealing disk 17 for replacement and maintenance, which is very convenient.

[0046] like Figure 6 As shown, the secondary ball mill device 6 includes a bracket 19, a secondary ball mill transmission shaft, a secondary ball mill motor 20 arranged at the upper end of the bracket 19, a secondary ball mill shell 21 arranged at the lower end of the bracket 19, a secondary ball mill drum 22 arranged in the secondary ball mill shell 21, and secondary grinding balls 23 arranged in the secondary ball mill drum 22. One end of the secondary ball mill transmission shaft is transmission-connected to the secondary ball mill motor 20 by means of a coupling, and the other end passes downward through the secondary ball mill shell 21 and is transmission-connected to the secondary ball mill drum 22. One side of the secondary ball mill shell 21 is provided with a feed port, and the other side is provided with a discharge port. The upper end of the secondary ball mill drum 22 is transmission-connected to the secondary ball mill transmission shaft, and the lower end is provided with a rotating shaft and is rotationally connected to the bottom of the secondary ball mill shell 21.

[0047] The secondary ball mill device 6 is a vertical structure. The secondary ball mill motor 20 drives the secondary ball mill drum 22 at high speed through the secondary ball mill transmission shaft. The secondary grinding balls 23 rotate and move upward along the inner wall of the secondary ball mill drum 22 with the centrifugal force generated by the rotation of the secondary ball mill drum 22. After moving to a certain height, they fall downward due to their own gravity. In this cycle, the collision of the secondary grinding balls 23 with each other and the friction with the inner wall of the secondary ball mill drum 22 can grind the material slurry. The upper end of the secondary ball mill drum 22 is driven and limited by the secondary ball mill transmission shaft, and the lower end is driven and limited by the rotating shaft. The operation is stable, and the obstruction caused by the through-type transmission shaft is avoided in the secondary ball mill drum 22. The ball milling efficiency of this structure is high and the operation stability is strong.

[0048] like Figure 6 As shown, the height of the discharge port is higher than that of the feed port, a secondary ball mill feed pipe 24 is arranged on the feed port, and the outer end of the secondary ball mill feed pipe 24 is arranged to be tilted upward, the discharge port is provided with a secondary ball mill discharge pipe 25, and the outer side of the secondary ball mill discharge pipe 25 is arranged to be tilted downward, the secondary grinding balls 23 include large balls, medium balls and small balls, the diameter of the large balls is larger than that of the medium balls and the number of the large balls is smaller than that of the medium balls, the diameter of the medium balls is larger than that of the small balls and the number of the medium balls is smaller than that of the small balls, and the diameter of the small balls is larger than the diameter of the through holes on the secondary ball mill drum (22).

[0049] The upwardly inclined secondary ball mill feed pipe 24 facilitates the entry of material slurry. As the secondary ball mill drum 22 rotates, the material slurry moves upward along the inner wall of the secondary ball mill shell 21 under the influence of centrifugal force, and is discharged from the secondary ball mill discharge pipe 25 with the help of the feed port. The downwardly inclined secondary ball mill discharge pipe 25 can facilitate the discharge of materials. Secondary grinding balls 23 of different sizes are used. The large balls have high energy and have a strong effect on large materials. The small balls fill the gaps between the large balls and have corresponding effects on materials of different fineness, thereby improving the grinding efficiency and grinding effect. If only small balls are used, it is obvious that the energy is too small and the efficiency is low. If only large balls are used, although the large balls have high energy, they have fewer effects at the same time with the same mass.

[0050] like Figure 6As shown, the bracket 19 includes an upper plate 26, a middle plate 27 with a through hole in the middle, a triangular plate 28 erected on the upper end surface and / or lower end surface of the middle plate 27, a column 29 arranged at the lower end of the middle plate 27 and a support column 30 arranged on the middle plate 27, the upper end of the support column 30 is fixed to the upper plate 26, and the lower end passes through the middle plate 27 and is downwardly fixed to the upper end of the secondary ball mill shell 21, the support column 30 and the triangular plate 28 are arranged around the through hole array of the middle plate 27, the triangular plate 28 is a right-angled triangle structure and the right-angled side on the inner side of the triangular plate 28 is fixed to the outer side of the support column 30, and the right-angled side at the lower end is fixed to the middle plate 27, the upper end of the upper plate 26 is fixed with a secondary ball mill motor 20, the output end of the secondary ball mill motor 20 vertically passes through the upper plate 26 and the middle plate 27 and is transmission-connected to the secondary ball mill shell 21, the column 29 is arranged at the lower end of the middle plate 27 and is located on the outside of the support column 30 and the secondary ball mill shell 21.

[0051] The upper plate 26 is used to fix the secondary ball mill motor 20, the middle plate 27 is used as the force point for fixing the overall structure, the triangular plate 28 further strengthens the strength and load-bearing and force-bearing capacity of the middle plate 27, the support column 30 is used to support the upper plate 26 and connect the upper plate 26 and the secondary ball mill shell 21, the bottom of the column 29 is fixed on the ground or platform, and the upper end top column middle plate 27 is used to prop up the entire structure so that the secondary ball mill shell 21 is suspended on the ground to form a vertical structure. If the secondary ball mill shell 21 is directly fixed on the ground or platform, the vibration will directly act on the ground or platform, causing damage to the ground and the platform, and multiple columns 29 will share the transmitted vibration and reduce the force of the vibration.

[0052] like Figure 7 As shown, the primary ball mill device 4 includes a fixed frame 31, a primary ball mill motor 32 arranged at the upper end of the fixed frame 31, a primary ball mill transmission shaft, a primary ball mill shell 33 arranged at the lower end of the fixed frame 31, a primary ball mill drum 34 arranged in the primary ball mill shell 33, and a ball mill stirring paddle arranged in the primary ball mill drum 34, one end of the primary ball mill transmission shaft passes through the primary ball mill shell 33 and extends into the primary ball mill drum 34 and is provided with primary ball mill blades 35 on the outer periphery, and the other end extends upward and is connected to the output end of the primary ball mill motor 32 by means of a coupling, a feed port is provided on one side of the primary ball mill shell 33, and a primary ball mill feed pipe is connected to the feed port and is inclined upward, and a discharge port is provided at the lower end, the primary ball mill blades 35 are annular plate-shaped structure, and primary grinding balls 36 are arranged between the primary ball mill blades 35, and the primary ball mill blades 35 are provided with multiple groups, and the diameters of the primary grinding balls 36 between the adjacent primary ball mill blades 35 decrease layer by layer from top to bottom.

[0053] The device is of a vertical structure. The primary ball mill motor 32 drives the primary ball mill drum 34 and the primary ball mill blades 35 to rotate. The primary grinding balls 36 in the primary ball mill drum 34 rotate and collide to realize ball milling of the material slurry. The primary grinding balls 36 are divided into multiple layers by means of the primary ball mill blades 35. The diameter of each primary grinding ball 36 decreases layer by layer from top to bottom, and the ball milling fineness of the material slurry by each layer of primary grinding balls 36 gradually increases. A through hole is provided on the primary ball mill blades 35 to facilitate the entry and exit of the material slurry. After the material slurry is impacted by the primary grinding balls 36, part of the material slurry will be thrown upward from the through hole on the primary ball mill blades 35 and then fall back. In addition, the through hole can increase the collision force of the primary grinding balls 36, thereby improving the mixing uniformity and fineness of the material slurry and increasing the ball milling efficiency.

[0054] like Figure 8 As shown, the melting device 1 includes a melting shell 37, a melting motor 38 arranged at the upper end of the melting shell 37, a melting stirring paddle arranged in the melting shell 37, a first melting heating coil 39 arranged on the outer periphery of the melting shell 37, and a second melting heating coil 40 arranged in the melting shell 37. The melting shell 37 is provided with a feed port at the upper end and a discharge port at the upper part of one side. The melting stirring paddle includes a transmission shaft and a melting blade 41 arranged on the transmission shaft. The melting blade 41 is a three-blade stirring paddle and a single / double-belt stirring paddle arranged on the transmission shaft from top to bottom. The upper end of the transmission shaft extends out of the melting shell 37 and is transmission-connected to the melting motor 38. The first melting heating coil 39 is spirally wound on the outer periphery of the melting shell 37. The second melting heating coil 40 is a multi-layer coil and is arranged between the melting stirring paddle and the inner wall of the melting shell 37 and is provided with a filter.

[0055] The first melting heating coil 39 heats the melting shell 37 to ensure that the melting shell 37 is also in a high temperature state, so as to avoid the problem that when the material enters the melting shell 37, the melting efficiency of some materials close to the melting shell 37 is low or even cannot be completely melted, which easily causes the particles to be in a semi-molten state and adhere to the melting shell 37. The second melting heating coil 40 heats the material in the melting shell 37 to melt the material. The material is melted into slurry after high temperature and filtered by the filter screen before entering the vicinity of the melting stirring paddle. The melting paddle 41 adopts a double blade, the upper part is a three-blade stirring blade, and the lower part is a single / double-screw stirring blade. The single / double-screw stirring blade cuts the slurry vertically and lifts and stirs the slurry. The three-blade stirring blade cuts the slurry horizontally, and the material is discharged from the discharge port on the upper outer side of the melting shell 37 after passing through the three-blade stirring blade, thereby ensuring the uniformity and fineness of the slurry and the processing efficiency.

[0056] like Fig. 9As shown, the primary mixing device 2 includes a primary mixing shell 42, a primary mixing motor 43 arranged at the upper end of the primary mixing shell 42, a first mixing heating coil 44 arranged on the outer periphery of the primary mixing shell 42, a second mixing heating coil 45 arranged in the primary mixing shell 42 and a primary mixing stirring paddle arranged in the primary mixing shell 42, the primary mixing shell 42 is provided with a feed inlet at the upper end and a discharge outlet at the upper part of one side, the first mixing heating coil 44 is spirally wound around the outer periphery of the primary mixing shell 42, the primary mixing stirring paddle includes a transmission shaft and a primary mixing blade 46 arranged on the transmission shaft, the primary mixing blade 46 is a single / double spiral belt stirring blade, the second mixing heating coil 45 is a multi-layer spiral coil structure, the second mixing heating coil 45 is arranged between the primary mixing blade 46 and the inner wall of the primary mixing shell 42 and is provided with a filter screen, and the secondary mixing device 3 has the same structure as the primary mixing device 2.

[0057] New materials are added to the primary mixing device and mixed with the melted material slurry. The first mixing heating coil 44 heats the primary mixing shell 42 to avoid the problem of low melting efficiency or even incomplete melting of some materials near the primary mixing shell 42 when the newly added materials enter the primary mixing shell 42. After the newly added materials are melted, they pass through the filter screen and enter the vicinity of the primary mixing paddle. The primary mixing blade 46 is a single / double-screw type stirring blade, which stirs, cuts and lifts the material slurry to ensure the mixing uniformity and fineness of the slurry. The slurry is discharged from the discharge port on the upper side of one side of the primary mixing shell 42 as the primary mixing blade 46 lifts it.

Claims

1. A high-tower melt high-phosphorus compound fertilizer granulation system, comprising a melting device (1), a primary mixing device (2), a secondary mixing device (3) and a granulation device arranged in sequence, characterized in that: It also includes a primary ball milling device (4) arranged between the primary mixing device (2) and the secondary mixing device (3), an emulsifying device (5) arranged between the secondary mixing device (3) and the granulating device, and a secondary ball milling device arranged between the secondary mixing device (3) and the emulsifying device (5), wherein the melting device (1), the primary mixing device (2), the primary ball milling device (4), the secondary mixing device (3), the secondary ball milling device (6), the emulsifying device (5) and the granulating device are arranged in a stepped manner from high to low; The primary ball mill device (4) comprises a fixed frame (31), a primary ball mill motor (32) arranged at the upper end of the fixed frame (31), a primary ball mill transmission shaft, a primary ball mill housing (33) arranged at the lower end of the fixed frame (31), a primary ball mill rotating drum (34) arranged in the primary ball mill housing (33), and a ball mill stirring paddle arranged in the primary ball mill rotating drum (34); one end of the primary ball mill transmission shaft passes through the primary ball mill housing (33) and extends into the primary ball mill rotating drum (34), and a primary ball mill paddle (35) is arranged on the outer periphery of the primary ball mill transmission shaft; the other end of the primary ball mill transmission shaft passes through the primary ball mill housing (33) and extends into the primary ball mill rotating drum (34), and a primary ball mill paddle (35) is arranged on the outer periphery of the primary ball mill transmission shaft; The end of the primary ball mill (33) extends upward and is connected to the output end of the primary ball mill motor (32) by means of a coupling; a feed port is provided on one side of the primary ball mill housing (33) and a primary ball mill feed pipe is connected to the feed port and is inclined upwardly arranged; a discharge port is provided at the lower end; the primary ball mill blades (35) are annular plate-shaped structures and primary grinding balls (36) are arranged between the primary ball mill blades (35); the primary ball mill blades (35) are provided with a plurality of groups and the diameters of the primary grinding balls (36) between adjacent primary ball mill blades (35) decrease layer by layer from top to bottom; The melting device (1) comprises a melting shell (37), a melting motor (38) arranged at the upper end of the melting shell (37), a melting stirring paddle arranged in the melting shell (37), a first melting heating coil (39) arranged on the outer periphery of the melting shell (37), and a second melting heating coil (40) arranged in the melting shell (37); the melting shell (37) is provided with a feed inlet at the upper end and a discharge outlet at the upper part of one side; the melting stirring paddle comprises a transmission shaft and a melting blade (41) arranged on the transmission shaft; the melting blade (41) is a three-blade stirring paddle and a single / double-belt stirring paddle arranged on the transmission shaft in sequence from top to bottom; the upper end of the transmission shaft extends out of the melting shell (37) and is transmission-connected to the melting motor (38); the first melting heating coil (39) is spirally wound on the outer periphery of the melting shell (37); the second melting heating coil (40) is a multi-layer coil and is arranged between the melting stirring paddle and the inner wall of the melting shell (37) and is provided with a filter screen.

2. A high tower melt high phosphorus compound fertilizer granulation system according to claim 1, characterized in that: The emulsifying device (5) comprises an emulsifying motor (7), a transmission shaft, an emulsifying housing (8) having a feed port and a discharge port, an emulsifying fixed cylinder (9) arranged in the emulsifying housing (8), and an emulsifying rotating cylinder (10) arranged in the emulsifying fixed cylinder (9); one end of the transmission shaft is transmission-connected to the emulsifying motor (7) by means of a coupling, and the other end passes through the emulsifying housing (8) and the emulsifying fixed cylinder (9) and is transmission-connected to the emulsifying rotating cylinder (10); the feed port is arranged outside the emulsifying housing (8), and the discharge port is arranged at the lower end of the emulsifying housing (8); the emulsifying fixed cylinder (9) is a barrel-shaped structure with an opening arranged toward the feed port; and the emulsifying rotating cylinder (10) is a barrel-shaped frame structure and has the freedom of rotation by means of the emulsifying motor (7).

3. A high tower melt high phosphorus compound fertilizer granulation system according to claim 2, characterized in that: The emulsifying drum (10) comprises a first fixed disk (11) and a second fixed disk (12) which are arranged correspondingly and have axial holes, and a strip plate (13) arranged between the first fixed disk (11) and the second fixed disk (12); the first fixed disk (11) is provided with a plurality of through holes and is arranged toward a feed inlet; the strip plates (13) are arranged in a circular array along the edge of a side opposite to the first fixed disk (11) and the second fixed disk (12); the outer side of the strip plates (13) is an arc surface and is in the same plane as the outer periphery of the first fixed disk (11) and the second fixed disk (12); A plurality of through holes are arranged on the outer peripheral surface of the emulsifying fixed cylinder (9), and the opening of the emulsifying fixed cylinder (9) at one end facing the feed inlet is larger than the diameter of the feed inlet.

4. A high tower melt high phosphorus compound fertilizer granulation system according to claim 2, characterized in that: A lubrication structure is provided between the emulsification housing (8) and the emulsification motor (7), and a sealing structure is provided between the emulsification housing (8) and the transmission shaft, the lubrication structure comprising a lubrication cylinder (14) filled with lubricating oil and shaft seats provided at both ends of the lubrication cylinder (14), the lubrication cylinder (14) being sealed by means of the shaft seats and the transmission shaft passing through the inner cavity of the lubrication cylinder (14) by means of the shaft seats; The sealing structure comprises a sealing cylinder (15), a sealing filler (16) arranged in the sealing cylinder (15), and a sealing disk (17) for sealing the sealing cylinder (15); the sealing cylinder (15) is arranged on the axial hole of the emulsifying shell (8) and the transmission shaft passes through the sealing cylinder (15); the sealing filler (16) is arranged between the sealing cylinder (15) and the transmission shaft; the sealing disk (17) has an annular boss (18) arranged on a side opposite to the sealing cylinder (15); the boss (18) is embedded between the sealing cylinder (15) and the transmission shaft and is pressed tightly against the sealing filler (16).

5. The granulation system of a high-tower melt high-phosphorus compound fertilizer according to claim 1, characterized in that: The secondary ball mill device (6) comprises a bracket (19), a secondary ball mill transmission shaft, a secondary ball mill motor (20) arranged at the upper end of the bracket (19), a secondary ball mill housing (21) arranged at the lower end of the bracket (19), a secondary ball mill drum (22) arranged in the secondary ball mill housing (21), and secondary grinding balls (23) arranged in the secondary ball mill drum (22); one end of the secondary ball mill transmission shaft is transmission-connected to the secondary ball mill motor (20) by means of a coupling, and the other end passes downward through the secondary ball mill housing (21) and is transmission-connected to the secondary ball mill drum (22); one side of the secondary ball mill housing (21) is provided with a feed port, and the other side is provided with a discharge port; the upper end of the secondary ball mill drum (22) is transmission-connected to the secondary ball mill transmission shaft, and the lower end is provided with a rotating shaft and is rotationally connected to the bottom of the secondary ball mill housing (21).

6. A high tower melt high phosphorus compound fertilizer granulation system according to claim 5, characterized in that: The height of the discharge port is higher than that of the feed port, a secondary ball mill feed pipe (24) is arranged on the feed port, and the outer end of the secondary ball mill feed pipe (24) is arranged to be inclined upward, the discharge port is provided with a secondary ball mill discharge pipe (25), and the outer side of the secondary ball mill discharge pipe (25) is arranged to be inclined downward, the secondary grinding balls (23) include large balls, medium balls and small balls, the diameter of the large balls is larger than that of the medium balls and the number of the large balls is smaller than that of the medium balls, the diameter of the medium balls is larger than that of the small balls and the number of the medium balls is smaller than that of the small balls, and the diameter of the small balls is larger than the diameter of the through holes on the secondary ball mill drum (22).

7. A high tower melt high phosphorus compound fertilizer granulation system according to claim 5, characterized in that: The support (19) comprises an upper plate (26), a middle plate (27) with a through hole in the middle, a triangular plate (28) vertically arranged on the upper end surface and / or the lower end surface of the middle plate (27), a column (29) arranged at the lower end of the middle plate (27), and a support column (30) arranged on the middle plate (27), wherein the upper end of the support column (30) is fixed to the upper plate (26), and the lower end passes through the middle plate (27) and is downwardly fixed to the upper end of the secondary ball mill shell (21), and the support column (30) and the triangular plate (28) surround the through hole array of the middle plate (27). The triangle plate (28) is a right-angled triangle structure, the right-angled side on the inner side of the triangle plate (28) is fixed to the outer side of the support column (30), and the right-angled side at the lower end is fixed to the middle plate (27); a secondary ball mill motor (20) is fixed to the upper end of the upper plate (26); the output end of the secondary ball mill motor (20) vertically passes through the upper plate (26) and the middle plate (27) and is transmission-connected to the secondary ball mill housing (21); and the column (29) is arranged at the lower end of the middle plate (27) and is located outside the support column (30) and the secondary ball mill housing (21).

8. The high-tower melt high-phosphorus compound fertilizer granulation system according to claim 1, characterized in that: The primary mixing device (2) comprises a primary mixing shell (42), a primary mixing motor (43) arranged at the upper end of the primary mixing shell (42), a first mixing heating coil (44) arranged on the outer periphery of the primary mixing shell (42), a second mixing heating coil (45) arranged in the primary mixing shell (42), and a primary mixing stirring paddle arranged in the primary mixing shell (42); the upper end of the primary mixing shell (42) is provided with a feed inlet, and the upper part of one side is provided with a discharge inlet; the first mixing heating coil (44) is spirally wound around the outer periphery of the primary mixing shell (42); the primary mixing stirring paddle comprises a transmission shaft and a primary mixing blade (46) arranged on the transmission shaft; the primary mixing blade (46) is a single / double helical ribbon stirring blade; the second mixing heating coil (45) is a multi-layer spiral coil structure; the second mixing heating coil (45) is arranged between the primary mixing blade (46) and the inner wall of the primary mixing shell (42) and is provided with a filter screen; the secondary mixing device (3) has the same structure as the primary mixing device (2).

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