CN107213845B - Compound fertilizer granulating system and granulating method thereof - Google Patents
Compound fertilizer granulating system and granulating method thereof Download PDFInfo
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- CN107213845B CN107213845B CN201710594406.0A CN201710594406A CN107213845B CN 107213845 B CN107213845 B CN 107213845B CN 201710594406 A CN201710594406 A CN 201710594406A CN 107213845 B CN107213845 B CN 107213845B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/18—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus
Abstract
The invention is suitable for the technical field of fertilizer production equipment, and provides a compound fertilizer granulating system and a granulating method of the compound fertilizer granulating system. The compound fertilizer granulating system comprises a granulating tower, wherein a granulator is arranged in the granulating tower and is connected with a material conveying device, a powder spraying machine is arranged above the granulator, a vibration wrapping device is arranged below the granulator, the tail end of the vibration wrapping device is connected with a discharge hole of the granulating tower, a screening machine is arranged at the discharge hole and is connected with a finished product packaging system, and the screening machine and the granulating tower are also connected with a material returning device. The compound fertilizer granulating system and the granulating method thereof provided by the invention can solve the problems of high building height, high energy consumption and large investment of a high tower, and can also solve the problems of low drum granulating forming rate and insufficient strength of granules. The system is used for producing the compound fertilizer, the product percent of pass is high, and the formed particles have good strength, water solubility and utilization rate.
Description
Technical Field
The invention belongs to the technical field of fertilizer production equipment, and particularly relates to a compound fertilizer granulating system and a granulating method of the compound fertilizer granulating system.
Background
At present, the method and equipment for producing the compound fertilizer mainly comprise two modes of high-tower melt granulation and rotary drum granulation.
The high tower melt pelletization must have a certain height, the minimum 75 meters, generally 90-95 meters, the construction high tower cost is high, and the materials must be transported to the top of the high tower, which causes huge energy consumption. And the particle size adjustment range of the product is narrow, and particularly, the production of the product with larger particles has certain difficulty. In addition, because the solidifying point of the high-temperature melt is not high, the melt is granulated when cooled, and is limited by the residence time of the particles in the tower, the particle size is large, the melt is not easy to cool, and the melt can be broken, deformed and not smooth after reaching the bottom of the tower.
The drum granulation has irregular particle molding, irregular dispersion, lower molding rate, more returned materials, low strength of particles, lower water solubility and utilization rate and easy loss.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a compound fertilizer granulating system and a granulating method of the compound fertilizer granulating system, which can solve the problems of high height, high energy consumption and large investment of a high-tower building, and can also solve the problems of low rotary drum granulating forming rate and insufficient strength of granules. The system is used for producing the compound fertilizer, the product percent of pass is high, the formed particles have good strength, water solubility and utilization rate, and the benefit of the existing compound fertilizer production is improved.
The invention is realized in the following way: the utility model provides a compound fertilizer granulation system, includes the prilling tower, be provided with in the prilling tower and be used for spraying to the sky, form the granulator of fertilizer primary granule, the granulator is connected with the conveying device who is used for carrying fertilizer raw materials, the top of granulator is provided with and is used for spraying the parcel powder to just carry out the powder spraying machine of parcel to fertilizer primary granule, the below of granulator is provided with and is used for to falling the fertilizer primary granule parcel again, and has vibration parcel device of screening and conveying function, vibration parcel device's end-to-end connection in the discharge gate of prilling tower, in the discharge gate department of prilling tower is provided with the screening machine, the screening machine is connected with finished product packaging system, the screening machine with the prilling tower still all is connected with the returning charge device that is used for carrying unqualified fertilizer granule.
Specifically, the granulator comprises a spray pipe, wherein the spray pipe is connected with the material conveying device, and a plurality of spray heads for spraying the fertilizer into the air to form fertilizer primary particles are arranged on the spray pipe.
Specifically, the powder spraying machine comprises a powder uniform distributor and a powder conveying pipe for conveying wrapped powder, wherein the powder uniform distributor is arranged at the upper part of the granulating tower and is parallel to the spraying pipe.
Specifically, vibration parcel device is including the vibrating plate that the slope set up, set up a plurality of through-holes that are used for screening fertilizer granule on the vibrating plate, the both ends of vibrating plate are connected with respectively and are used for driving the vibrating motor of the reciprocal vibration of vibrating plate.
Specifically, the vibrating plate is arranged in a downward inclined manner from the upper part of the granulating tower, and the bottom end of the inclined vibrating plate is arranged at the discharge hole of the granulating tower.
Specifically, an interlocking pump for controlling the proportion of fertilizer raw materials to wrapping powder is connected in parallel between the material conveying device and the powder conveying pipe.
Specifically, the bottom of the prilling tower is provided with a blower for conveying heating steam into the prilling tower from bottom to top, and the blower is connected with a steam input pipe.
Specifically, the top of prilling tower is connected with through the gas-supply pipe and is used for sucking the inside dust of prilling tower dust collector, dust collector includes air exhauster and sack cleaner, the air inlet of air exhauster with the gas-supply pipe is connected, the gas vent of air exhauster with the sack cleaner is connected, the sack cleaner still is connected with the fan that is used for sucking its inside gas and discharges to the sky, the air exhauster with the sack cleaner still is connected with and is used for carrying inside dust granule to the dust-conveying pipe on the returning charge device.
Specifically, the screening machine includes the screening ware and sets up the separating funnel of screening ware below, the finished product package system sets up the finished product discharge gate below of separating funnel.
The invention also provides a granulating method of the compound fertilizer granulating system, the compound fertilizer granulating system comprises a granulating tower, a granulator for forming fertilizer primary granules is arranged in the granulating tower, the granulator is connected with a material conveying device for conveying fertilizer raw materials, a powder spraying machine for spraying coating powder to coat the fertilizer primary granules is arranged above the granulator, a vibration coating device which is used for coating the fallen fertilizer primary granules again and has screening and conveying functions is arranged below the granulator, the tail end of the vibration coating device is connected with a discharge hole of the granulating tower, a screening machine is arranged at the discharge hole of the granulating tower, the screening machine is connected with a finished product packaging system, the screening machine and the granulating tower are both connected with a material returning device for conveying unqualified fertilizer particles, the bottom of the granulating tower is provided with a blower for conveying heating steam into the granulating tower from bottom to top, the top of the granulating tower is connected with a dust removing device for sucking dust inside the granulating tower through a pipe, and the granulating method comprises the steps of conveying the dust in the granulating tower: the method comprises the steps that fertilizer raw materials are conveyed into a granulator through a conveying device, a powder sprayer and a blower are started, the granulator sprays into the granulating tower to form fertilizer primary particles, the fertilizer primary particles and wrapping powder sprayed by the powder sprayer are adhered, wrapped and cooled in the air, fall onto a vibration wrapping device after a certain height, the fertilizer primary particles which are not cooled completely roll on the vibration wrapping device and continue to be adhered, wrapped and formed with the wrapping powder, meanwhile, steam is conveyed into the granulating tower through the blower to enable the fertilizer primary particles to be kept at wrapped and formed temperature in the granulating process, dust-containing air in the granulating tower is sucked through a dust removing device, the formed fertilizer particles enter into a screening machine through a discharge port to be screened, qualified fertilizer particles enter into a finished product packaging system to be packaged, and unqualified fertilizer particles are conveyed into a crusher through a returning device to be crushed and recycled.
The invention provides a compound fertilizer granulating system and a granulating method of the compound fertilizer granulating system. Thus, the fertilizer primary particles sprayed from the granulator can be adhered and wrapped with the coating powder sprayed by the powder spraying machine, the particles can be cooled and solidified, and the fertilizer primary particles which are not cooled completely can be vibrated and rolled on the vibration wrapping device in the falling process, so that the fertilizer primary particles can be wrapped and molded again, and the fertilizer primary particles can be molded into qualified fertilizer particles. The arrangement mode does not need to arrange a large-height granulating tower to carry out granulation production, so that the manufacturing cost is reduced, and the problem of low finished product qualification rate caused by insufficient height and incomplete cooling of granules in granulation is solved. The compound fertilizer granulating system is used for granulating and producing the compound fertilizer, the granulating method is simple in steps, the obtained fertilizer particles are more round and more regular, the forming qualification rate is higher, and the production benefit of enterprises is improved.
Drawings
Fig. 1 is a schematic structural diagram of a compound fertilizer granulating system provided by the embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following describes in detail the implementation of the present invention in connection with specific embodiments:
as shown in fig. 1, the compound fertilizer granulating system provided in the embodiment of the invention comprises a granulating tower 11, wherein a granulator 12 for spraying fertilizer primary particles into the air is arranged in the granulating tower 11, and the granulator 12 is connected with a material conveying device 13 for conveying fertilizer raw materials. The fertilizer raw materials are prepared by putting powdery monoammonium phosphate, potassium chloride, additives and the like into a mixing tank according to a certain proportion, fully mixing into compound slurry (nitrogen-phosphorus-potassium eutectic) with high solubility and certain fluidity, extruding and conveying the compound slurry into a granulator 12 through a conveying device 13, and spraying the compound slurry with certain pressure into the air through the granulator 12 to form fertilizer primary particle liquid drops so as to carry out subsequent production and processing.
Specifically, as shown in fig. 1, in the embodiment of the present invention, in order to reduce the construction cost of the compound fertilizer granulation system and improve the qualification rate of the fertilizer granule product, and solve the defect of low qualification rate of the product caused by insufficient height of the granule which is not completely cooled in the conventional granulation by using the melting method, a powder spraying machine (not shown in the figure) for spraying a coating powder to coat the fertilizer primary granule is arranged above the granulator 12, and the coating powder is formed by mixing powders of potash fertilizer, trace elements, etc. The vibration parcel device 15 that is used for carrying out parcel again to the fertilizer primary particle that falls is provided with in the below of granulator 12, and this vibration parcel device 15 has screening and transport function moreover, make the fertilizer primary particle that falls above it can vibrate in cladding powder and roll, glues glutinous parcel powder, the end-to-end connection of vibration parcel device 15 is in the discharge gate 111 of prilling tower 11, be provided with screening machine 16 in the discharge gate 111 department of prilling tower 11, screening machine 16 is connected with finished product package system 17, screening machine 16 and prilling tower 11 still all are connected with the returning charge device 18 that is used for carrying unqualified fertilizer particle. Through such setting, make the liquid droplet that sprays the aerial fertilizer primary particle that forms can glue the adhesion parcel with parcel powder at first to cool off at the in-process that falls, and after the incomplete cooled fertilizer granule falls on vibration parcel device 15, owing to vibrate parcel device 15 to cover and have the cladding powder, therefore vibration parcel device 15 can drive the fertilizer granule that falls above that constantly vibrates and roll in the cladding powder, and the incomplete cooled fertilizer granule then can continue to glue the adhesion parcel with the parcel powder at this moment, makes granule more mellow, more regular, the shaping rate is higher, promotes the qualification rate of product. Finally, the fertilizer particles formed after the coating are discharged from a discharge hole 111 of the granulating tower 11 and enter a screening machine 16 for screening, the fertilizer particles conforming to the regulations enter a packaging system for cooling and packaging, the fertilizer particles not conforming to the regulations are discharged to a returning device 18, and finally crushed by a crusher and added into a heater together with raw material fine powder as returning materials for recycling.
Specifically, in actual production, when the fertilizer primary particles falling on the wrapping device are cooled and wrapped again, fertilizer particles fall from the wrapping device, so that the bottom of the prilling tower 11 is set to be funnel-shaped, and the falling fertilizer particles can be collected and then uniformly discharged to the returning device 18, and then crushed and then heated and melted for use.
According to the compound fertilizer granulating system provided by the embodiment of the invention, the powder spraying machine and the wrapping device are arranged in the granulating tower 11, so that under the matched combination production of the powder spraying machine and the wrapping device, the efficiency of the fertilizer particle forming production and the quality after forming can be improved, and the granulating tower 11 constructed by the arrangement mode has the advantages of low overall construction height, less investment and low production energy consumption, and the problems of high height, high energy consumption and high investment required by the conventional granulating tower 11 are solved. Meanwhile, the fertilizer particles produced by the compound fertilizer granulating system are round and regular, the product percent of pass is high, the strength, the water solubility and the utilization rate of the particles are good, and the product quality of the compound fertilizer is greatly improved.
Specifically, referring to fig. 1, in the embodiment of the present invention, the granulator 12 includes a spray pipe 121, the spray pipe 121 is connected to the feeding device 13, and a plurality of spray nozzles 122 for spraying fertilizer primary particles into the air are disposed on the spray pipe 121. In this way, the compound slurry with certain fluidity and pressure is extruded and conveyed into the injection pipe 121 by the material conveying device 13, then is injected into the air in the prilling tower 11 through the nozzle 122, can be dispersed into particles in the air descending process, is stuck with the air-coated powder, and is continuously cooled and solidified to form fertilizer particles.
Specifically, in order to increase the time for which the fertilizer primary particles formed by spraying from the spray head 122 are in contact in the air, the contact with the coating powder sprayed in the air is ensured to be achieved to the greatest extent, so that the cooling efficiency and the quality of the coating are improved, and the spray head 122 is vertically upwards arranged, so that the maximum lifting height is provided, and the time required for dropping is also maximized. Of course, the shower head 122 may be provided so as to be biased to one side.
Specifically, as shown in fig. 1, the powder blower includes a powder uniform distributor 141 and a powder conveying pipe 142 for conveying the packed powder, and the powder uniform distributor 141 is disposed at an upper portion of the prilling tower 11 and is disposed in parallel with the spray pipe 121. The powder distributor 141 is provided with a plurality of powder spraying holes (not shown) uniformly, and a powder distributor (not shown) for distributing the coating powder uniformly to the powder spraying holes is provided inside. Thus, the coating powder fed through the powder feeding pipe 142 can be uniformly sprayed into the prilling tower 11 by the distribution of the powder uniformly distributor 141, thereby ensuring effective contact with the fertilizer primary particles and uniformly coating the fertilizer primary particles.
Specifically, in the embodiment of the present invention, as shown in fig. 1, the vibration wrapping device 15 includes a vibration plate 151 disposed obliquely, a plurality of through holes for screening fertilizer particles are formed in the vibration plate 151, and two ends of the vibration plate 151 are respectively connected with a vibration motor 152 for driving the vibration plate 151 to vibrate reciprocally for screening. In actual production, since the size of the fertilizer particles to be finally molded has a certain specification, the vibration plate 151 is provided with a through hole, and the size of the through hole is set according to the specification of the qualified fertilizer particles. In this way, the vibration motor 152 drives the vibration plate 151 to vibrate up and down, then the fertilizer primary particles which are not completely cooled down on the vibration plate 151 roll in the coating powder along the direction of the inclination of the vibration plate 151, the coating powder is continuously adhered, in the process, the fertilizer primary particles with small particle size fall from the through holes, the fertilizer particles which meet the specification roll to the bottom along the direction of the inclination of the vibration plate 151, and then flow out from the discharge hole 111 of the granulation tower 11 and enter the sieving machine 16 for further screening. The setting mode prolongs the cooling time of the fertilizer primary granules, realizes the cooling of the fertilizer primary granules without constructing the granulation very high, simultaneously, can carry out preliminary screening of the formed fertilizer granules through the vibrating plate 151, and then carries out secondary screening through the screening machine 16, thereby improving the final product quality of the compound fertilizer.
Specifically, as shown in fig. 1, the vibration plate 151 is disposed obliquely downward from the upper part of the prilling tower 11, and the bottommost end of the inclined vibration plate 151 is disposed at the discharge port 111 of the prilling tower 11. This arrangement allows fertilizer granules to flow from the outlet 111 of the prilling tower 11 to the sieving machine 16 after the completion of the wrapping and preliminary sieving.
Specifically, in order to improve the effect of primary fertilizer granule wrapping, a plurality of vibrating plates 151 are arranged on the upper and lower spacer layers, each vibrating plate 151 is obliquely arranged, two ends of each vibrating plate are respectively connected with a vibrating motor 152, and the bottommost end of the vibrating plate 151 positioned at the bottommost end is arranged at the discharge hole 111 of the granulating tower 11. Thus, the fertilizer primary particles are wrapped through the vibration rolling of the plurality of vibration plates 151, so that the roundness of the formed fertilizer particles is ensured, the shape is more regular, and the qualification rate of the final formed product is improved. In practical arrangement, the vibration plates 151 arranged obliquely can be arranged in parallel, can be arranged alternately in a reciprocating manner, can also be spirally formed by connecting the vibration plates 151 end to end, and can also meet the use requirement of rolling package. In the embodiment of the invention, the plurality of vibration plates 151 arranged in the granulation tower 11 are arranged in a head-to-tail reciprocating and alternating mode, so that the falling fertilizer primary particles can be wrapped under the common vibration of the plurality of vibration plates 151, and the product forming rate is improved.
Referring to fig. 1, in the embodiment of the present invention, an interlocking pump 19 for controlling the ratio of fertilizer raw materials to coating powder is connected in parallel between the feeding device 13 and the powder conveying pipe 142. Thus, the interlocking pump 19 can control the input fertilizer raw materials and the coating powder, so that the proportion of the nitrogen-phosphorus-potassium eutectic and the coating powder is kept in a reasonable range, the granulation rate is improved, the material returning rate is reduced, and the energy consumption is further reduced.
Specifically, as shown in fig. 1, a blower 21 for feeding heating steam into the granulation tower 11 from the bottom up is provided at the bottom of the granulation tower 11, and a steam inlet pipe 211 is connected to the blower 21. By providing the blower 21 to input hot steam into the prilling tower 11, heat is provided to maintain the material in the prilling tower 11 at a suitable temperature during the granulation process, avoiding that small fertilizer granules will cool without sticking to the coating powder and will not stick. The rising hot steam enables the liquid drops of the nitrogen-phosphorus-potassium eutectic to have more sufficient contact time with the wrapping powder, and takes away the moisture in the primary particles of the powder in the contact process, so that the strength of the granulated fertilizer particles is increased.
Specifically, in the embodiment of the present invention, as shown in fig. 1, a dust removing device (not labeled in the drawing) for sucking dust inside the prilling tower 11 is connected to the top of the prilling tower 11 through a gas pipe 23, the dust removing device includes an exhaust fan 221 and a bag-type dust remover 222, the gas inlet of the exhaust fan 221 is connected to the gas pipe 23, and the gas outlet of the exhaust fan 221 is connected to the bag-type dust remover 222, so that dust-containing air inside the prilling tower 11 is sucked through the exhaust fan 221, and after the dust-containing air enters the exhaust fan 221 and the bag-type dust remover 222, dust contained in the air can be filtered out and then discharged into the air. To increase the efficiency of evacuation after filtration, the bag-type dust collector 222 is further connected with a fan 223 for sucking the gas therein and discharging the gas into the air. In addition, in order to improve the recycling rate of the product, a dust conveying pipe 224 for discharging the dust particles inside to the returning device 18 is connected to the suction fan 221 and the bag-type dust collector 222. Thus, the particles and dust precipitated in the suction fan 221 and the bag-type dust collector 222 can be recovered and reused for fertilizer production by being transported by the returning device 18. The dust collector has the advantages that the utilization rate of raw materials is improved, waste is avoided, dust can be prevented from polluting air, and the dust collector is economical and environment-friendly.
Specifically, as shown in fig. 1, the sifter 16 includes a sifter 161 and a distribution funnel 162 disposed below the sifter 161, and the product packaging system 17 is disposed below a product discharge port 163 of the distribution funnel 162. Since the fertilizer particles flowing out of the discharge port 111 of the prilling tower 11 are not final qualified products, some fertilizer particles have too large diameter and some have too small diameter, and in order to obtain qualified products, the sieving machine 16 is provided to sieve the fertilizer particles again, the fertilizer particles meeting the requirements flow to the finished product packaging system 17 for storage after being subjected to later treatment such as moisture-proof, caking-proof and the like, while the large-particle fertilizer particles flow to the returning device 18 from the coarse returning port 164, and the small-particle fertilizer particles flow to the returning device 18 from the fine returning port 165, and finally are reused after being crushed. In addition, in order to ensure the cleanliness of the environment in the screener 161, the screener is connected with an exhaust fan through an exhaust pipe 166, so that dust in the screener can be sucked and removed, and the overall cleanliness of the production environment is ensured.
The embodiment of the invention also provides a granulating method of the compound fertilizer granulating system, the compound fertilizer granulating system comprises a granulating tower 11, a granulator 12 for forming fertilizer primary granules is arranged in the granulating tower 11, the granulator 12 is connected with a material conveying device 13 for conveying fertilizer raw materials, a powder spraying machine for spraying coating powder to coat the fertilizer primary granules is arranged above the granulator 12, a vibration coating device 15 for coating the fallen fertilizer primary granules again and having screening and conveying functions is arranged below the granulator 12, the tail end of the vibration coating device 15 is connected with a discharge hole 111 of the granulating tower 11, a screening machine 16 is arranged at the discharge hole 111 of the granulating tower 11, the screening machine 16 is connected with a finished product packaging system 17, both the screening machine 16 and the granulating tower 11 are also connected with a material returning device 18 for conveying unqualified fertilizer particles, the bottom of the granulating tower 11 is provided with a blower 21 for conveying heating steam from bottom to top to the granulating tower 11, and the top of the granulating tower 11 is connected with a dust removing device for sucking dust inside the granulating tower 11 through a gas conveying pipe 23. The granulating method comprises the following steps: the fertilizer raw material is conveyed into the granulator 12 through the conveying device 13, and the whole granulating system is started for supplying, including starting a powder blower, a blower 21 and a dust removing device. The input fertilizer raw material is sprayed into the granulating tower 11 through the granulator 12 to form fertilizer primary granules, and the fertilizer primary granules and the coating powder sprayed by the powder spraying machine are adhered and coated in the air and cooled. The fertilizer primary particles fall onto the vibration wrapping device 15 after a certain height, wherein the incompletely cooled fertilizer primary particles roll in the wrapping powder along with the vibration of the vibration plate 151, and are continuously adhered with the wrapping powder to be wrapped and formed. When the fertilizer primary particles and the coating powder are adhered and coated, steam is conveyed into the granulating tower 11 through the blower 21 so that the fertilizer primary particles are kept at the temperature of coating forming in the granulating process, the contact time of the coating powder and the fertilizer primary particles is prolonged, dust-containing air in the granulating tower 11 is sucked through the dust removing device, the formed fertilizer particles enter the sieving machine 16 through the discharging hole 111 for sieving, qualified fertilizer particles enter the finished product packaging system 17 for packaging, and unqualified fertilizer particles are conveyed into the crusher through the returning device 18 for recycling after being crushed. The granulating method combines the advantages of high-tower melt granulating and rotary drum granulating, has low height and energy consumption, and the formed granules have good strength, water solubility and utilization rate, saves the production and manufacturing cost and improves the production efficiency.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The utility model provides a compound fertilizer granulation system, includes the prilling tower, be provided with in the prilling tower and be used for spraying to the sky, form the granulator of fertilizer primary granule, the granulator is connected with the material conveying device who is used for carrying fertilizer raw materials, its characterized in that, the top of granulator is provided with and is used for spraying the parcel powder to right the powder sprayer that the fertilizer primary granule is wrapped up, the below of granulator is provided with and is used for to falling the vibration parcel device that the fertilizer primary granule is wrapped up once more, and has screening and conveying function, vibration parcel device's end connect in the discharge gate of prilling tower, in the discharge gate department of prilling tower is provided with the screening machine, the screening machine is connected with finished product package system, the screening machine with the prilling tower still all is connected with the returning device who is used for carrying unqualified fertilizer particle, the bottom of prilling tower is the hopper-shaped, the equipartition machine includes powder distributor and is used for carrying the powder conveyer pipe that wraps up, evenly be provided with a plurality of powder spouting holes on the powder distributor, inside the powder distributor is provided with vibration parcel device, just have vibration parcel device, vibration parcel device in the vibration parcel device is located in the bottom of the most parallel with the vibration sieve that sets up to the vibration sieve tube, the vibration particle is located in the most of the bottom of the vibration sieve tube, the vibration sieve tube sets up, the vibration sieve plate is set up in the vibration sieve tube, the vibration plate is arranged on the vibration sieve plate, and is located down the vibration plate is set up to the vibration sieve plate, and is connected with vibration plate, and is set up to vibration plate and has the vibration plate The utility model provides a forming fertilizer and just being granular shower nozzle, the shower nozzle sets up perpendicularly upwards, perhaps, the shower nozzle is inclined to one side setting, the material conveying device with connect in parallel between the powder conveyer pipe and be used for controlling fertilizer raw materials and parcel powder ratio interlocking pump, the bottom of prilling tower is provided with and is used for from down upwards to carry the air-blower of heating steam in the prilling tower, the air-blower is connected with the steam input pipe, the top of prilling tower is connected with through the gas-supply pipe and is used for sucking the dust collector in the prilling tower, dust collector includes air exhauster and sack cleaner, the air inlet of air exhauster with the gas-supply pipe is connected, the sack cleaner still is connected with and is used for sucking its inside gas and arrange to aerial fan, the air exhauster with the sack cleaner still is connected with and is used for carrying the dust particle row of inside to the dust conveying pipe on the returning charge device, the air blower includes the screening ware and sets up the branch hopper of screening below, the finished product package system sets up the diameter of the dust collector is in the diameter of returning charge hopper below the air outlet is used for returning the coarse grain size of the big particle to flow out of the dust collector.
2. The compound fertilizer granulating system of claim 1, wherein vibration motors for driving the vibration plates to vibrate reciprocally are respectively connected to both ends of the vibration plates.
3. A granulating method of a compound fertilizer granulating system, wherein the compound fertilizer granulating system is used for granulating, the compound fertilizer granulating system comprises a granulating tower, a granulator for forming fertilizer primary granules is arranged in the granulating tower, the granulator is connected with a conveying device for conveying fertilizer raw materials, a powder spraying machine for spraying coating powder to coat the fertilizer primary granules is arranged above the granulator, a vibration coating device which is used for re-coating the fallen fertilizer primary granules and has screening and conveying functions is arranged below the granulator, the tail end of the vibration coating device is connected with a discharge port of the granulating tower, a screening machine is arranged at the discharge port of the granulating tower, the screening machine is connected with a finished product packaging system, the sieving machine and the granulating tower are also connected with a returning device for conveying unqualified fertilizer particles, the bottom of the granulating tower is funnel-shaped, the powder spraying machine comprises a powder uniform distributor and a powder conveying pipe for conveying wrapped powder, a plurality of powder spraying holes are uniformly formed in the powder uniform distributor, a powder distributor is arranged in the powder uniform distributor, the size of the through holes is set according to the specification of the qualified fertilizer particles, a plurality of vibrating plates are arranged on upper and lower spacing layers of the vibrating plates, the vibrating plates are connected end to form a spiral shape, the granulating machine comprises a spraying pipe, the spraying pipe is connected with the conveying device, the powder uniform distributor is arranged on the upper part of the granulating tower and is parallel to the spraying pipe, a plurality of spray heads for spraying and forming fertilizer primary particles into the air are arranged on the spraying pipe, the spray heads are vertically upwards arranged or are arranged on one side of the spray heads in a deflection manner, the utility model provides a granulation method of fertilizer, including the granulation tower, the powder conveyer pipe is connected with in parallel, the delivery device with be used for controlling fertilizer raw materials with the interlocking pump of parcel powder ratio between the powder conveyer pipe, the bottom of granulation tower is provided with and is used for from down up to carry the air-blower of heating steam in the granulation tower, the air-blower is connected with the steam input pipe, the top of granulation tower is connected with through the gas-supply pipe and is used for sucking the dust collector in the granulation tower inside dust, dust collector includes air exhauster and sack cleaner, the air inlet of air exhauster with the gas-supply pipe is connected, the gas vent of air exhauster with the sack cleaner is connected with the fan that is used for sucking its inside gas and arrange to the sky, the air exhauster with the sack cleaner is connected with the dust conveyer pipe that is used for carrying the dust granule of inside to on the returning charge device, the screening machine includes the classifier and sets up the dividing hopper below the classifier, the finished product package system sets up the finished product discharge gate below of dividing hopper, the screening machine is still including the coarse grain that is used for flowing out the fertilizer particle of diameter and the diameter is big and is the particle that returns to the step is used for returning to the granule, and the method of returning to the fine grain is characterized in that: the method comprises the steps that fertilizer raw materials are conveyed into a granulator through a conveying device, a powder sprayer and a blower are started, the granulator sprays into the granulating tower to form fertilizer primary particles, the fertilizer primary particles and wrapping powder sprayed by the powder sprayer are adhered, wrapped and cooled in the air, fall onto a vibration wrapping device after a certain height, the fertilizer primary particles which are not cooled completely roll on the vibration wrapping device and continue to be adhered and wrapped with the wrapping powder to form, meanwhile, steam is conveyed into the granulating tower through the blower to enable the fertilizer primary particles to be kept at the temperature of wrapping forming in the granulating process, dust-containing air in the granulating tower is sucked through a dust removing device, the formed fertilizer particles enter the screening machine through a discharge hole to be screened, qualified fertilizer particles enter a finished product packaging system to be packaged, and unqualified fertilizer particles are conveyed into a crusher through a returning device to be crushed and recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594406.0A CN107213845B (en) | 2017-07-20 | 2017-07-20 | Compound fertilizer granulating system and granulating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594406.0A CN107213845B (en) | 2017-07-20 | 2017-07-20 | Compound fertilizer granulating system and granulating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107213845A CN107213845A (en) | 2017-09-29 |
| CN107213845B true CN107213845B (en) | 2023-08-29 |
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| CN108187960B (en) * | 2017-12-28 | 2020-06-16 | 大连隆星新材料有限公司 | Powder spraying system |
| CN110090598A (en) * | 2018-01-30 | 2019-08-06 | 徐州市禾协肥业有限公司 | A kind of plate-type device of fertilizer slurry drop curing molding |
| CN112645753A (en) * | 2019-10-11 | 2021-04-13 | 任晓芳 | Preparation method of soil fructification prevention calcium supplement agent applied to soil improvement |
| CN112426949A (en) * | 2020-11-02 | 2021-03-02 | 易树华 | Compound fertilizer production equipment with material returning control device and use method thereof |
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