CN114804982A - Compound fertilizer multilayer coating closed processing production line - Google Patents
Compound fertilizer multilayer coating closed processing production line Download PDFInfo
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- CN114804982A CN114804982A CN202210437251.0A CN202210437251A CN114804982A CN 114804982 A CN114804982 A CN 114804982A CN 202210437251 A CN202210437251 A CN 202210437251A CN 114804982 A CN114804982 A CN 114804982A
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- 238000000576 coating method Methods 0.000 title claims abstract description 166
- 239000011248 coating agent Substances 0.000 title claims abstract description 157
- 239000003337 fertilizer Substances 0.000 title claims abstract description 48
- 150000001875 compounds Chemical class 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000012545 processing Methods 0.000 title claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 50
- 238000012216 screening Methods 0.000 claims abstract description 31
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 72
- 238000010438 heat treatment Methods 0.000 claims description 60
- 239000007788 liquid Substances 0.000 claims description 60
- 238000007599 discharging Methods 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 26
- 238000003860 storage Methods 0.000 claims description 18
- 239000008187 granular material Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 239000007888 film coating Substances 0.000 claims description 6
- 238000009501 film coating Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000010923 batch production Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 22
- 239000007789 gas Substances 0.000 description 10
- 239000002775 capsule Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
Abstract
The invention discloses a compound fertilizer multilayer coating closed processing production line, which comprises a reaction tank, a feeding pipe network, a temperature regulator, a coating device and a coating box, wherein the coating box comprises a pedestal, and the top surface of the pedestal is hinged with a swing table through a hinged roller; two sides of the swing platform are provided with jacking hydraulic cylinders; a limiting frame pressed with the swing table is fixed on the piston end of the jacking hydraulic cylinder; a rotary kiln is fixed at the top of the swing table; the rotary kiln comprises a kiln head, a film covering area, a transit area and a kiln tail which are sequentially arranged; the transfer zone comprises a drying zone, a screening zone and a buffer zone; and heat supply sources are arranged at the drying area and the coating area. The multi-layer coating closed processing production line for the compound fertilizer adopts a totally closed production line to carry out multi-layer coating, the coating is simple and convenient, the coating efficiency is high, the whole coating process is in a totally closed state, and the safety is high.
Description
Technical Field
The invention relates to a compound fertilizer processing line, in particular to a compound fertilizer multilayer coating closed processing production line, and belongs to the technical field of compound fertilizer processing lines.
Background
The coated compound fertilizer consists of compound fertilizer master batches and a coating layer; the coated compound fertilizer is prepared by coating and wrapping thin-layer materials on the surfaces of compound fertilizer particles by a physical method, and the current commonly used coated compound fertilizer production devices are a spouted bed (or a fluidized bed), a rotary table, a rotary drum and the like; wherein the spouted bed (or fluidized bed) has the problems of easy dead bed, easy caking and the like; the rotary disc and the rotary drum have the problems of long coating time, uneven coating, wide occupied area, large equipment investment and the like; in addition, when each layer of raw material is coated, the raw material is easy to release polluted gases (industrial formaldehyde, ammonia gas and the like) or particles during processing under certain temperature conditions, so that the body of a producer is injured to a certain extent.
Disclosure of Invention
In order to solve the problems, the invention provides a multi-layer coating closed processing production line for compound fertilizers, which adopts a totally closed production line to carry out multi-layer coating, has simple and convenient coating and high coating efficiency, and the whole coating process is in a totally closed state, so that the safety is high.
The invention relates to a multi-layer coating closed processing production line of a compound fertilizer, which comprises
The reaction tanks are provided with at least two groups, and a batching system and a temperature controller are arranged at the reaction tanks;
the feeding pipe network comprises at least two material guiding pipes, and a heat exchange type heating jacket is arranged outside each material guiding pipe; one end of each material guide pipe is connected with a discharge end of the reaction tank, the other end of each material guide pipe is connected to a metering valve through an independent electric control valve, the input end of the heating jacket is connected to a first circulating pump through a passage valve and is connected to the output end of the heating furnace, and the output end of the heating jacket is connected to the input end of the heating furnace through a passage valve;
the temperature regulator comprises a closed temperature regulating box, a heating coil is mounted at the bottom of the temperature regulator, the output end of the metering valve is connected to the temperature regulating box, the input end of the heating coil is connected to the secondary temperature regulating heater, the input end of the secondary heater is connected to the output end of the heating furnace through a second circulating pump, and the output end of the heating coil is connected to the input end of the heating furnace; a liquid outlet pipe valve is arranged at the bottom of the temperature regulating box;
an enveloper comprising an inner tube; a plurality of rows of spiral connectors are arranged on the inner pipe; one end of the inner pipe is sealed, and the other end of the inner pipe is fixed to the end seat; an outer pipe is sleeved outside the inner pipe, the end part of the outer pipe is fixed on the end seat, and an outer mounting hole is formed in the outer pipe, which is opposite to the spiral connector; a film coating nozzle is embedded in each outer mounting hole, is connected with the spiral connector in a screwing mode and is tightly pressed with the outer wall of the outer pipe; a flange seat communicated with the inner pipe is arranged at one end, far away from the inner pipe, of the end seat; the flange seat is connected to a distribution three-way valve; the other two ends of the distribution three-way valve are respectively connected with a liquid outlet pipe valve and a recoverer; the recoverer comprises an end head; the end head is provided with a plurality of branch valves, and each branch valve is connected to a recovery tank through a hose;
the coating box comprises a pedestal, and the top surface of the pedestal is hinged with a swing table through a hinge roller; two sides of the swing platform are provided with jacking hydraulic cylinders; a limiting frame pressed with the swing table is fixed on the piston end of the jacking hydraulic cylinder; a rotary kiln is fixed at the top of the swing table; the rotary kiln comprises a kiln head, a film covering area, a transit area and a kiln tail which are sequentially arranged; the transfer zone comprises a drying zone, a screening zone and a buffer zone; and heat supply sources are arranged at the drying area and the coating area.
Further, the heat supply source comprises a cylindrical heating jacket movably arranged outside the film wrapping area and the drying area; the input end and the output end of the cylindrical heating jacket are connected to a heat supply pipe network.
Furthermore, the enveloping area and the transit area are connected through a manual rotary valve, or a high-temperature-resistant rubber ring is arranged between the enveloping area and the transit area, the inner walls of the enveloping area, the transit area and the high-temperature-resistant rubber ring are on the same plane, and the outsides of the enveloping area and the transit area are tightly coated through a pull rod, tempered glass and/or rubber.
Furthermore, the coating area and the transit area are respectively provided with a guide mechanism and a driving mechanism; the driving mechanism comprises a transmission shaft for driving the enveloping area and the transit area to synchronously rotate; the transmission shaft is driven by a speed reducing motor drive assembly.
Furthermore, the kiln head comprises a base body, a guide bearing is arranged on the base body, and a feeding hopper is arranged on the base body and is opposite to the guide bearing; the feeding hopper is provided with a hydraulic first feeding valve plate and a hydraulic second feeding valve plate, and a feeding temporary storage bin is arranged between the hydraulic first feeding valve plate and the hydraulic second feeding valve plate; the kiln tail comprises a base body, a guide bearing is arranged on the base body, and a discharge hopper is arranged on the base body and is opposite to the guide bearing; a hydraulic first discharging valve plate and a hydraulic second discharging valve plate are arranged on the discharging hopper, and a discharging temporary storage bin is arranged between the hydraulic first discharging valve plate and the hydraulic second discharging valve plate; the first hydraulic feeding valve plate and the first hydraulic discharging valve plate are arranged on the base body and are tightly attached to the outer end part of the transit area.
Furthermore, the screening area comprises a screening mesh array arranged on the rotary kiln, and an outer sheath is arranged outside the screening mesh array of the rotary kiln; the outer sheath is installed with the rotary kiln through a bearing, the outer sheath is fixed with the swing table, the bottom of the outer sheath is funnel-shaped and is connected with the closed material cylinder, and a blanking weighing belt or a weighing hopper is arranged on the inner side of the closed material cylinder.
Further, an exhaust pipe valve is arranged at the kiln head or the kiln tail.
Further, the production line works as follows:
A. preparing materials for the coating, namely preparing the materials for the coating according to a coating material mixing table, sequentially adding all the materials into a reaction tank according to a production process, adjusting the rotating speed of a stirring paddle of the reaction tank, the temperature of the reaction tank, the reaction time of the reaction tank and a reaction ph value until the reaction of the raw materials is finished to obtain a coating liquid, wherein the number of the reaction tanks is determined according to the number of layers of the coating and the preparation time of the coating liquid, and the delay preparation is carried out according to the sequence of the inner layer and the outer layer of the coating when each layer of the coating liquid is prepared;
B. coating and feeding, namely feeding the coating liquid to a material guide pipe after the preparation of the innermost coating liquid is finished, preheating the material guide pipe before feeding, feeding the coating liquid when the temperature meets the transmission requirement, opening a passage valve and a first circulating pump of a heating jacket corresponding to the material guide pipe during preheating, continuously pumping a heat medium to the material guide pipe by a heating furnace, and closing all the passage valves until the feeding is finished; when the coating liquid is fed, the metering valve continuously meters, after the proportioning weight is reached, the independent electric control valve is closed, and the raw material of the material guide pipe is bypassed to the heat preservation box; when feeding next time, the material is preferably pumped;
C. controlling the temperature before coating, pumping the first layer of coating liquid to a temperature regulating box, then, carrying out temperature following on a heating coil, wherein the temperature of the heating coil is consistent with the temperature of a heating jacket, turning on a secondary heater after the coating liquid reaches the proportioning weight, carrying out secondary heating on a heating medium to raise the temperature, and carrying out temperature keeping and following after the temperature is reached;
D. the coating comprises the following specific components:
d1, adjusting the temperature of the envelope, and adjusting the temperature of the envelope area by a heat supply source arranged outside the envelope area until the temperature meets the process requirement;
d2, coating and feeding, closing the hydraulic first feeding valve plate, opening the hydraulic second feeding valve plate, feeding the feeding temporary storage bin through the feeding machine, switching the hydraulic first feeding valve plate and the hydraulic second feeding valve plate after feeding, and during switching, closing the hydraulic first feeding valve plate and the hydraulic second feeding valve plate at the same time, and then switching on and off; feeding a certain amount of basic granular material into the rotary kiln;
d3, adjusting the position, wherein during the position adjustment, the limit frame is driven by a jacking hydraulic cylinder to jack the swing table, and the swing table is horizontally arranged with the ground;
d4, coating, wherein in the coating process, a pressure pump is started, the coating liquid is pumped into the inner pipe through the pressure pump and is sent into a coating nozzle through a plurality of rows of spiral connectors, the coating liquid is atomized and pumped into the basic particle material through the coating nozzle, the rotary kiln is firstly rotated clockwise for a preset number of turns and then rotated anticlockwise for a preset number of turns, and when the coating liquid of the temperature adjusting box is completely sent out, the rotary kiln is stopped rotating for a preset number of turns;
d5, recovering the coating liquid, wherein during proportioning and metering, the feeding amount of each layer of coating liquid is 3-5% greater than the coating amount of the compound fertilizer, when the rotary kiln stops rotating, the coating liquid stops feeding, the position of the rotary kiln is adjusted by tightly pushing a hydraulic cylinder, the inclination of a swinging table is not more than 15 degrees, the coating liquid flows to a recoverer, and the coating liquid is guided into a heat insulation box corresponding to the coating liquid through an end head, a branch valve and a recovery tank; the rotary kiln inclines to one side of the transfer area by no more than 10 degrees;
E. drying, screening and secondary returning, wherein the compound fertilizer coated in sequence is sent to a drying area for drying, during drying, a heat source outside the drying area is adjusted to reach a preset drying temperature, and during heating in the drying area, the rotary kiln continuously rotates until all the granular materials are sent to the drying area; the rotary kiln is reset to a horizontal state, and at the moment, the rotary kiln rotates and dries for a preset time, and then the drying heat source is closed; the rotary kiln inclines to one side of the screening area again for no more than 10 degrees; continuously rotating the rotary kiln, drying the dried particles, screening the dried particles through a screening area, finally conveying the dried particles to a buffering material area, isolating the particles through a hydraulic first feeding valve plate, accumulating the dried particles in the buffering material area, and finally inclining the rotary kiln to one side of a coating area again by no more than 15 degrees; after secondary screening, resetting the dried material to a coating area;
F. coating N times, namely sequentially finishing multiple layers of coatings according to the steps, feeding the fertilizer coated by the last layer into a drying area after the last sequential coating is finished, feeding the material into a material temporary storage bin through a feeder, and switching a hydraulic first feeding valve plate and a hydraulic second feeding valve plate, wherein in the switching process, the hydraulic first feeding valve plate and the hydraulic second feeding valve plate are firstly closed simultaneously and then switched on and off; feeding a certain amount of basic granular material into the rotary kiln; meanwhile, the gas in the rotary kiln cannot leak; at the moment, the drying or screening of the previous batch of fertilizer and the coating of the next batch of fertilizer are carried out simultaneously, the current batch of compound fertilizer particles move to a temporary discharging storage bin and the next batch of compound fertilizer particles move to a drying area through a manual rotary valve or a coating area time-delay feeding mode; during discharging, the hydraulic first discharging valve plate is opened and the hydraulic second discharging valve plate is closed, the coated compound fertilizer enters a discharging temporary storage bin, then the hydraulic first discharging valve plate and the hydraulic second discharging valve plate are switched, in the switching process, the hydraulic first discharging valve plate is opened and the hydraulic second discharging valve plate is closed at the same time, and then switching is performed; feeding a certain amount of basic granular material into the rotary kiln; the rotary kiln is discharged periodically; meanwhile, the gas in the rotary kiln cannot leak;
G. and coating for N times, opening an exhaust pipe valve when the preset batch production is finished or the rotary kiln needs to be stopped for maintenance, exhausting air through the exhaust pipe valve, sending the gas containing materials inside into gas treatment equipment, and discharging the gas after reaching the standard.
Compared with the prior art, the multi-layer coating closed processing production line for the compound fertilizer adopts a fully-closed production line to carry out multi-layer coating, the coating is simple and convenient, the coating efficiency is high, the whole coating process is in a fully-closed state, and the safety is high.
Drawings
FIG. 1 is a schematic view of a connection structure of a reaction tank, a feed pipe network and a temperature regulator in example 1 of the present invention.
Fig. 2 is a schematic structural diagram of an enveloping machine in embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of a capsule box according to embodiment 1 of the present invention.
Detailed Description
Example 1:
the multi-layer coating closed processing production line of the compound fertilizer shown in figure 1 comprises
The reaction tank 1 is provided with at least two groups, and a batching system and a temperature controller are arranged at the reaction tank 1;
the feeding pipe network comprises at least two material guiding pipes 21, and a heat exchange type heating jacket 22 is arranged outside each material guiding pipe; one end of each material guide pipe 21 is connected with a discharge end of the reaction tank 1, the other end of the material guide pipe 21 is connected to a metering valve 24 through an independent electric control valve 23, the input end of the heating jacket 22 is connected to a first circulating pump 26 through a passage valve 25 and is connected to the output end of a heating furnace 27, and the output end of the heating jacket 22 is connected to the input end of the heating furnace 27 through the passage valve 25;
the thermostat comprises a closed thermostat 31, a heating coil 32 is mounted at the bottom of the thermostat 31, the output end of the metering valve 24 is connected to the thermostat 31, the input end of the heating coil 32 is connected to a secondary thermostat 33, the input end of the secondary thermostat 33 is connected to the output end of the heating furnace 27 through a second circulating pump 34, and the output end of the heating coil 32 is connected to the input end of the heating furnace 27; the bottom of the temperature regulating box 31 is provided with a liquid outlet pipe valve 35;
as shown in fig. 2, the capsule, which comprises an inner tube 41; a plurality of rows of spiral joints 42 are arranged on the inner pipe 41; the inner tube 41 is sealed at one end and fixed at the other end to an end seat 43; an outer pipe 44 is sleeved outside the inner pipe 41, the end part of the outer pipe 44 is fixed on the end seat 43, and an outer mounting hole is formed in the outer pipe 44 opposite to the spiral connector 42; a film coating nozzle 45 is embedded in each outer mounting hole, and the film coating nozzle 45 is screwed with the spiral connector 42 and tightly pressed with the outer wall of the outer pipe 44; a flange seat communicated with the inner pipe is arranged at one end, far away from the inner pipe, of the end seat 43; the flange seat is connected to a distribution three-way valve 46; the other two ends of the distribution three-way valve 46 are respectively connected with the liquid outlet pipe valve 35 and the recoverer; the retriever comprises a tip 47; a plurality of branch valves 48 are arranged on the end head 47, and each branch valve 48 is connected to a recovery tank 49 through a hose;
as shown in fig. 3, the film coating box comprises a pedestal 51, wherein the top surface of the pedestal 51 is hinged with a swing table 52 through a hinged roller; two sides of the swing platform 52 are provided with jacking hydraulic cylinders 53; a limiting frame 54 pressed with the swing table is fixed on the piston end of the jacking hydraulic cylinder 53; a rotary kiln is fixed at the top of the swing table 54; the rotary kiln comprises a kiln head 55, a coating area 56, a transit area and a kiln tail 58 which are arranged in sequence; the staging zone comprises a drying zone 571, a screening zone 572, and a buffering zone 573; and heat supply sources are arranged at the drying area 571 and the coating area 56.
Wherein the heat supply source comprises a cylindrical heating jacket 59 movably arranged outside the film wrapping area and the drying area; the input end and the output end of the cylindrical heating jacket 59 are connected to a heat supply pipe network.
The film wrapping area 56 and the transit area are connected through a manual rotary valve 61, or a high-temperature-resistant rubber ring is arranged between the film wrapping area 56 and the transit area, the inner walls of the film wrapping area, the transit area and the high-temperature-resistant rubber ring are in the same plane, and the outer portions of the film wrapping area and the transit area are tightly wrapped through a pull rod, tempered glass and/or rubber.
The film wrapping area 56 and the transfer area are respectively provided with a guide mechanism 71 and a driving mechanism 72; the driving mechanism 72 comprises a transmission shaft 721 for driving the enveloping zone and the transit zone to synchronously rotate; the transmission shaft 721 is driven by a reduction motor drive assembly 722.
The kiln head 55 comprises a base 551, a guide bearing is arranged on the base 551, and a feed hopper 552 is arranged on the base 551 opposite to the guide bearing; a hydraulic first feeding valve plate 553 and a hydraulic second feeding valve plate 554 are arranged on the feeding hopper 552, and a feeding temporary storage bin 555 is arranged between the hydraulic first feeding valve plate 553 and the hydraulic second feeding valve plate 554; the kiln tail 58 comprises a base 551, a guide bearing is arranged on the base 551, and a discharge hopper 581 is arranged on the base 551 opposite to the guide bearing; a hydraulic first discharging valve plate 582 and a hydraulic second discharging valve plate 583 are arranged on the discharging hopper 581, and a discharging temporary storage bin 584 is arranged between the hydraulic first discharging valve plate 582 and the hydraulic second discharging valve plate 583; the first pan feeding valve plate 583 of hydraulic pressure and the first ejection of compact valve plate 582 of hydraulic pressure set up on pedestal 551, and paste the outer tip installation in the transfer district tightly.
The screening area 572 comprises a screening mesh array arranged on a rotary kiln, and an outer sheath 81 is arranged outside the screening mesh array of the rotary kiln; the outer sheath 81 is mounted with the rotary kiln through a bearing, the outer sheath 81 is fixed with the swing table 52, the bottom of the outer sheath 52 is funnel-shaped and is connected with the closed material cylinder 82, and a blanking weighing belt or a weighing hopper (not shown) is arranged on the inner side of the closed material cylinder 82.
And an exhaust pipe valve 91 is arranged at the kiln head 55 or the kiln tail 58.
The production line has the following working process:
A. preparing materials for the coating, namely preparing the materials for the coating according to a coating material mixing table, sequentially adding all the materials into a reaction tank according to a production process, adjusting the rotating speed of a stirring paddle of the reaction tank, the temperature of the reaction tank, the reaction time of the reaction tank and a reaction ph value until the reaction of the raw materials is finished to obtain a coating liquid, wherein the number of the reaction tanks is determined according to the number of layers of the coating and the preparation time of the coating liquid, and the delay preparation is carried out according to the sequence of the inner layer and the outer layer of the coating when each layer of the coating liquid is prepared;
B. coating and feeding, namely feeding the coating liquid to a material guide pipe after the preparation of the innermost coating liquid is finished, preheating the material guide pipe before feeding, feeding the coating liquid when the temperature meets the transmission requirement, opening a passage valve and a first circulating pump of a heating jacket corresponding to the material guide pipe during preheating, continuously pumping a heat medium to the material guide pipe by a heating furnace, and closing all the passage valves until the feeding is finished; when the coating liquid is fed, the metering valve continuously meters, after the proportioning weight is reached, the independent electric control valve is closed, and the raw material of the material guide pipe is bypassed to the heat preservation box; when feeding next time, the material is preferably pumped;
C. controlling the temperature before coating, pumping the first layer of coating liquid to a temperature regulating box, then, carrying out temperature following on a heating coil, wherein the temperature of the heating coil is consistent with the temperature of a heating jacket, turning on a secondary heater after the coating liquid reaches the proportioning weight, carrying out secondary heating on a heating medium to raise the temperature, and carrying out temperature keeping and following after the temperature is reached;
D. the coating comprises the following specific components:
d1, adjusting the temperature of the envelope, and adjusting the temperature of the envelope area by a heat supply source arranged outside the envelope area until the temperature meets the process requirement;
d2, performing film coating feeding, closing the hydraulic first feeding valve plate, opening the hydraulic second feeding valve plate, feeding the fed materials to a fed material temporary storage bin through a feeding machine, and switching the hydraulic first feeding valve plate and the hydraulic second feeding valve plate after feeding; feeding a certain amount of basic granular material into the rotary kiln;
d3, adjusting the position, wherein during the position adjustment, the limit frame is driven by a jacking hydraulic cylinder to jack the swing table, and the swing table is horizontally arranged with the ground;
d4, coating, wherein in the coating process, a pressure pump is started, the coating liquid is pumped into the inner pipe through the pressure pump and is sent into a coating nozzle through a plurality of rows of spiral connectors, the coating liquid is atomized and pumped into the basic particle material through the coating nozzle, the rotary kiln is firstly rotated clockwise for a preset number of turns and then rotated anticlockwise for a preset number of turns, and when the coating liquid of the temperature adjusting box is completely sent out, the rotary kiln is stopped rotating for a preset number of turns;
d5, recovering the coating liquid, wherein during proportioning and metering, the feeding amount of each layer of coating liquid is 3-5% greater than the coating amount of the compound fertilizer, when the rotary kiln stops rotating, the coating liquid stops feeding, the position of the rotary kiln is adjusted by tightly pushing a hydraulic cylinder, the inclination of a swinging table is not more than 15 degrees, the coating liquid flows to a recoverer, and the coating liquid is guided into a heat insulation box corresponding to the coating liquid through an end head, a branch valve and a recovery tank; the rotary kiln inclines to one side of the transfer area by no more than 10 degrees;
E. drying, screening and secondary returning, wherein the compound fertilizer coated in sequence is sent to a drying area for drying, during drying, a heat source outside the drying area is adjusted to reach a preset drying temperature, and during heating in the drying area, the rotary kiln continuously rotates until all the granular materials are sent to the drying area; the rotary kiln is reset to a horizontal state, and at the moment, the rotary kiln rotates and dries for a preset time, and then the drying heat source is closed; the rotary kiln inclines to one side of the screening area again for no more than 10 degrees; continuously rotating the rotary kiln, drying the dried particles, screening the dried particles through a screening area, finally conveying the dried particles to a buffering material area, isolating the particles through a hydraulic first feeding valve plate, accumulating the dried particles in the buffering material area, and finally inclining the rotary kiln to one side of a coating area again by no more than 15 degrees; after secondary screening, resetting the dried material to a coating area;
F. coating N times, namely sequentially finishing multiple layers of coatings according to the steps, feeding the fertilizer coated by the last layer into a drying area after the last sequential coating is finished, feeding the material into a material temporary storage bin through a feeder, and switching a hydraulic first feeding valve plate and a hydraulic second feeding valve plate, wherein in the switching process, the hydraulic first feeding valve plate and the hydraulic second feeding valve plate are firstly closed simultaneously and then switched on and off; feeding a certain amount of basic granular material into the rotary kiln; meanwhile, the gas in the rotary kiln cannot leak; at the moment, the drying or screening of the previous batch of fertilizer and the coating of the next batch of fertilizer are carried out simultaneously, the current batch of compound fertilizer particles move to a temporary discharging storage bin and the next batch of compound fertilizer particles move to a drying area through a manual rotary valve or a coating area time-delay feeding mode; during discharging, the hydraulic first discharging valve plate is opened and the hydraulic second discharging valve plate is closed, the coated compound fertilizer enters a discharging temporary storage bin, then the hydraulic first discharging valve plate and the hydraulic second discharging valve plate are switched, in the switching process, the hydraulic first discharging valve plate is opened and the hydraulic second discharging valve plate is closed at the same time, and then switching is performed; feeding a certain amount of basic granular material into the rotary kiln; the rotary kiln is discharged periodically; meanwhile, the gas in the rotary kiln cannot leak;
G. and (4) coating for N times, opening an exhaust pipe valve when the preset batch production is finished or the rotary kiln needs to be stopped for maintenance, exhausting air through the exhaust pipe valve, and sending the internal material-containing gas into gas treatment equipment for discharging after reaching the standard.
The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.
Claims (8)
1. The utility model provides a compound fertilizer multilayer diolame closed processing lines which characterized in that: comprises that
The reaction tanks are provided with at least two groups, and a batching system and a temperature controller are arranged at the reaction tanks;
the feeding pipe network comprises at least two material guiding pipes, and a heat exchange type heating jacket is arranged outside each material guiding pipe; one end of each material guide pipe is connected with a discharge end of the reaction tank, the other end of each material guide pipe is connected to a metering valve through an independent electric control valve, the input end of the heating jacket is connected to a first circulating pump through a passage valve and is connected to the output end of the heating furnace, and the output end of the heating jacket is connected to the input end of the heating furnace through a passage valve;
the temperature regulator comprises a closed temperature regulating box, a heating coil is mounted at the bottom of the temperature regulator, the output end of the metering valve is connected to the temperature regulating box, the input end of the heating coil is connected to the secondary temperature regulating heater, the input end of the secondary heater is connected to the output end of the heating furnace through a second circulating pump, and the output end of the heating coil is connected to the input end of the heating furnace; a liquid outlet pipe valve is arranged at the bottom of the temperature regulating box;
an enveloper comprising an inner tube; a plurality of rows of spiral connectors are arranged on the inner pipe; one end of the inner pipe is sealed, and the other end of the inner pipe is fixed to the end seat; an outer pipe is sleeved outside the inner pipe, the end part of the outer pipe is fixed on the end seat, and an outer mounting hole is formed in the outer pipe, which is opposite to the spiral connector; a film coating nozzle is embedded in each outer mounting hole, is connected with the spiral connector in a screwing mode and is tightly pressed with the outer wall of the outer pipe; a flange seat communicated with the inner pipe is arranged at one end, far away from the inner pipe, of the end seat; the flange seat is connected to a distribution three-way valve; the other two ends of the distribution three-way valve are respectively connected with a liquid outlet pipe valve and a recoverer; the recoverer comprises an end head; the end head is provided with a plurality of branch valves, and each branch valve is connected to a recovery tank through a hose;
the coating box comprises a pedestal, and the top surface of the pedestal is hinged with a swing table through a hinge roller; two sides of the swing platform are provided with jacking hydraulic cylinders; a limiting frame pressed with the swing table is fixed on the piston end of the jacking hydraulic cylinder; a rotary kiln is fixed at the top of the swing table; the rotary kiln comprises a kiln head, a film covering area, a transit area and a kiln tail which are sequentially arranged; the transfer zone comprises a drying zone, a screening zone and a buffer zone; and heat supply sources are arranged at the drying area and the coating area.
2. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: the heat supply source comprises a cylindrical heating jacket movably arranged outside the film wrapping area and the drying area; the input end and the output end of the cylindrical heating jacket are connected to a heat supply pipe network.
3. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: the coating zone is connected with the transit zone through a manual rotary valve, or a high-temperature-resistant rubber ring is arranged between the coating zone and the transit zone, the inner walls of the coating zone, the transit zone and the high-temperature-resistant rubber ring are on the same plane, and the coating zone and the transit zone are covered and fastened through a pull rod, toughened glass and/or rubber.
4. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: the coating area and the transit area are respectively provided with a guide mechanism and a driving mechanism; the driving mechanism comprises a transmission shaft for driving the enveloping area and the transit area to synchronously rotate; the transmission shaft is driven by a speed reducing motor drive assembly.
5. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: the kiln head comprises a base body, a guide bearing is arranged on the base body, and a feeding hopper is arranged on the base body and is opposite to the guide bearing; the feeding hopper is provided with a hydraulic first feeding valve plate and a hydraulic second feeding valve plate, and a feeding temporary storage bin is arranged between the hydraulic first feeding valve plate and the hydraulic second feeding valve plate; the kiln tail comprises a base body, a guide bearing is arranged on the base body, and a discharge hopper is arranged on the base body and is opposite to the guide bearing; a hydraulic first discharging valve plate and a hydraulic second discharging valve plate are arranged on the discharging hopper, and a discharging temporary storage bin is arranged between the hydraulic first discharging valve plate and the hydraulic second discharging valve plate; the first hydraulic feeding valve plate and the first hydraulic discharging valve plate are arranged on the base body and are tightly attached to the outer end part of the transit area.
6. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: the screening area comprises a screening mesh array arranged on the rotary kiln, and an outer sheath is arranged outside the screening mesh array of the rotary kiln; the outer sheath is installed with the rotary kiln through a bearing, the outer sheath is fixed with the swing table, the bottom of the outer sheath is funnel-shaped and is connected with the closed material cylinder, and a blanking weighing belt or a weighing hopper is arranged on the inner side of the closed material cylinder.
7. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: and an exhaust pipe valve is arranged at the kiln head or the kiln tail.
8. The compound fertilizer multi-layer coating closed processing production line according to claim 1, characterized in that: the production line has the following working process:
A. preparing materials for the coating, namely preparing the materials for the coating according to a coating material mixing table, sequentially adding all the materials into a reaction tank according to a production process, adjusting the rotating speed of a stirring paddle of the reaction tank, the temperature of the reaction tank, the reaction time of the reaction tank and a reaction ph value until the reaction of the raw materials is finished to obtain a coating liquid, wherein the number of the reaction tanks is determined according to the number of layers of the coating and the preparation time of the coating liquid, and the delay preparation is carried out according to the sequence of the inner layer and the outer layer of the coating when each layer of the coating liquid is prepared;
B. coating and feeding, namely feeding the coating liquid to a material guide pipe after the preparation of the innermost coating liquid is finished, preheating the material guide pipe before feeding, feeding the coating liquid when the temperature meets the transmission requirement, opening a passage valve and a first circulating pump of a heating jacket corresponding to the material guide pipe during preheating, continuously pumping a heat medium to the material guide pipe by a heating furnace, and closing all the passage valves until the feeding is finished; when the coating liquid is fed, the metering valve continuously meters, after the proportioning weight is reached, the independent electric control valve is closed, and the raw material of the material guide pipe is bypassed to the heat preservation box; when feeding next time, the material is preferably pumped;
C. controlling the temperature before coating, pumping the first layer of coating liquid to a temperature regulating box, then, carrying out temperature following on a heating coil, wherein the temperature of the heating coil is consistent with the temperature of a heating jacket, turning on a secondary heater after the coating liquid reaches the proportioning weight, carrying out secondary heating on a heating medium to raise the temperature, and carrying out temperature keeping and following after the temperature is reached;
D. the coating comprises the following specific components:
d1, adjusting the temperature of the envelope, and adjusting the temperature of the envelope area by a heat supply source arranged outside the envelope area until the temperature meets the process requirement;
d2, coating and feeding, closing the hydraulic first feeding valve plate, opening the hydraulic second feeding valve plate, feeding the feeding temporary storage bin through the feeding machine, switching the hydraulic first feeding valve plate and the hydraulic second feeding valve plate after feeding, and during switching, closing the hydraulic first feeding valve plate and the hydraulic second feeding valve plate at the same time, and then switching on and off; feeding a certain amount of basic granular material into the rotary kiln;
d3, adjusting the position, wherein during the position adjustment, the limit frame is driven by a jacking hydraulic cylinder to jack the swing table, and the swing table is horizontally arranged with the ground;
d4, coating, wherein in the coating process, a pressure pump is started, the coating liquid is pumped into the inner pipe through the pressure pump and is sent into a coating nozzle through a plurality of rows of spiral connectors, the coating liquid is atomized and pumped into the basic particle material through the coating nozzle, the rotary kiln is firstly rotated clockwise for a preset number of turns and then rotated anticlockwise for a preset number of turns, and when the coating liquid of the temperature adjusting box is completely sent out, the rotary kiln is stopped rotating for a preset number of turns;
d5, recovering the coating liquid, wherein during proportioning and metering, the feeding amount of each layer of coating liquid is 3-5% greater than the coating amount of the compound fertilizer, when the rotary kiln stops rotating, the coating liquid stops feeding, the rotary kiln is adjusted by a jacking hydraulic cylinder, the inclination of a swing table is not more than 15 degrees, the coating liquid flows to a recoverer, and the coating liquid is guided into an incubator corresponding to the coating liquid through an end head, a branch valve and a recovery tank; the rotary kiln inclines to one side of the transit area by no more than 10 degrees;
E. drying, screening and secondary returning, wherein the compound fertilizer coated in sequence is sent to a drying area for drying, during drying, a heat source outside the drying area is adjusted to reach a preset drying temperature, and during heating in the drying area, the rotary kiln continuously rotates until all the granular materials are sent to the drying area; the rotary kiln is reset to a horizontal state, and at the moment, the rotary kiln rotates and dries for a preset time, and then the drying heat source is closed; the rotary kiln inclines to one side of the screening area again for no more than 10 degrees; continuously rotating the rotary kiln, drying the dried particles, screening the dried particles through a screening area, finally conveying the dried particles to a buffering material area, isolating the particles through a hydraulic first feeding valve plate, accumulating the dried particles in the buffering material area, and finally inclining the rotary kiln to one side of a coating area again by no more than 15 degrees; after secondary screening, resetting the dried material to a coating area;
F. coating N times, namely sequentially finishing multiple layers of coatings according to the steps, feeding the fertilizer coated by the last layer into a drying area after the last sequential coating is finished, feeding the material into a material temporary storage bin through a feeder, and switching a hydraulic first feeding valve plate and a hydraulic second feeding valve plate, wherein in the switching process, the hydraulic first feeding valve plate and the hydraulic second feeding valve plate are firstly closed simultaneously and then switched on and off; feeding a certain amount of basic granular material into the rotary kiln; meanwhile, the gas in the rotary kiln cannot leak; at the moment, the drying or screening of the previous batch of fertilizer and the coating of the next batch of fertilizer are carried out simultaneously, the current batch of compound fertilizer particles move to a temporary discharging storage bin and the next batch of compound fertilizer particles move to a drying area through a manual rotary valve or a coating area time-delay feeding mode; during discharging, the hydraulic first discharging valve plate is opened and the hydraulic second discharging valve plate is closed, the coated compound fertilizer enters a discharging temporary storage bin, then the hydraulic first discharging valve plate and the hydraulic second discharging valve plate are switched, in the switching process, the hydraulic first discharging valve plate is opened and the hydraulic second discharging valve plate is closed at the same time, and then switching is performed; feeding a certain amount of basic granular material into the rotary kiln; the rotary kiln is discharged periodically; meanwhile, the gas in the rotary kiln cannot leak;
G. and (4) coating for N times, opening an exhaust pipe valve when the preset batch production is finished or the rotary kiln needs to be stopped for maintenance, exhausting air through the exhaust pipe valve, and sending the internal material-containing gas into gas treatment equipment for discharging after reaching the standard.
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| CN202210437251.0A CN114804982A (en) | 2022-04-25 | 2022-04-25 | Compound fertilizer multilayer coating closed processing production line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210437251.0A CN114804982A (en) | 2022-04-25 | 2022-04-25 | Compound fertilizer multilayer coating closed processing production line |
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| CN203212493U (en) * | 2013-04-10 | 2013-09-25 | 山东金沂蒙生态肥业有限公司 | Novel slow release fertilizer coating and drying device |
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Application publication date: 20220729 |