A high-efficiency drying device for phosphate rock powder pellet production

Abstract

The invention discloses a high-efficiency drying device for producing phosphate rock powder pellets, comprising a feeding mechanism, a drying tower body, a feeding mechanism and a heating mechanism, wherein the drying tower body comprises a feeding section, a drying section and a discharging section arranged in sequence from top to bottom, wherein multiple rows of guide plates are installed inside the drying section, and the discharging section comprises multiple discharging cone buckets; the heating mechanism comprises an air inlet chamber, an exhaust chamber and a hot air furnace, and multiple rows of heating pipes are installed in the drying section, and the heating pipes are respectively connected to the air inlet chamber and the exhaust chamber; the discharging mechanism comprises a supporting plate, an upper supporting plate beam and a lower supporting plate beam, wherein the supporting plates are installed above the upper supporting plate beam at intervals, and 2 to 4 flexible connectors are installed between each upper supporting plate beam and the load-bearing bottom plate; a guiding cone and a discharging mechanism are installed below the discharging mechanism, and a driving mechanism is installed on one side of the discharging mechanism. The device can realize continuous feeding, drying, discharging and discharging drying operations, and has the advantages of high drying efficiency, significant drying effect, stable operation and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of phosphorus chemical industry, and in particular relates to a high-efficiency drying device for producing phosphate rock powder pellets. Background Art

[0002] Yellow phosphorus is an important chemical raw material. Various phosphides and phosphates produced with it are of various types and widely used. Using yellow phosphorus to make phosphoric acid is one of the phosphoric acid production processes, namely thermal phosphoric acid. According to resource reserve statistics, the national phosphate rock resource reserves are about 1.89 billion tons, and the basic reserves are 3.902 billion tons. It is mainly distributed in five provinces, including Yunnan, Guizhou, Hubei, Sichuan, and Hunan. Measured by W (P2O5), the overall grade of my country's phosphate resources is low. More than 90% of the phosphate rock is medium-low grade ore with P2O5 less than 30%, and rich ore with P2O5 greater than 30% only accounts for about 8% of the total reserves. Phosphate ore with a grade of less than 25% accounts for 78.57% of the total phosphate ore. That is to say, more than 90% of my country's phosphate rock is medium-low grade phosphate rock, and the average grade is only about 17%. With the rapid development of phosphorus chemical industry, the mining of high-grade phosphate ore has been increasing. In addition, the large-scale mining of phosphate resources, especially the widespread use of the method of abandoning poor and mining rich and the lack of advanced mining technology, have led to the waste of phosphate resources, making the rich ore with a mass fraction of P2O5 above 30% rapidly depleted. Its rapid consumption has led to the prominent crisis of phosphate ore. At present, high-grade phosphate ore for yellow phosphorus, especially weathered phosphate ore, will produce a large amount of powder ore during processing and use. The powderization rate is usually around 20%, and some are as high as 50% or more. This part of phosphate ore powder must be prepared into pellets before it can be used to produce yellow phosphorus. In the existing technology, the production process of phosphate ore powder pellets includes batching, mixing, pelletizing, drying and other processes. Drying is an important process for making phosphate ore pellets, and the drying device is the key equipment in the drying process of phosphate ore powder. Whether the structural design of the drying device is reasonable or not is not only related to the production quality of phosphate ore pellets, but also to the production capacity, use cost and energy consumption of the device. Therefore, it is an objective need to develop an efficient drying device for phosphate rock powder pellet production that has a reasonable structural design, is easy to implement, can greatly improve the drying effect and drying efficiency, and can realize continuous drying operation. Summary of the invention

[0003] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide an efficient drying device for the production of phosphate rock powder pellets, which has a reasonable structural design, is easy to implement, can greatly improve the drying effect and drying efficiency, and can realize continuous drying operation.

[0004] The invention discloses a high-efficiency drying device for producing phosphate rock powder pellets, comprising a feeding mechanism, a drying tower body, a discharging mechanism and a heating mechanism. The drying tower body comprises a feeding section, a drying section and a discharging section arranged in sequence from top to bottom. The feeding section comprises a first transition section and a second transition section. The first transition section is a structure with a large upper end and a small lower end, and the second transition section is a structure with a small upper end and a large lower end. The upper end of the first transition section is located below the discharging end of the feeding mechanism, the lower end of the first transition section is fixedly connected to the upper end of the second transition section, and the second transition section is a structure with a small upper end and a large lower end. The lower end of the drying section is fixedly connected to the upper end of the drying section, and multiple rows of guide plates are horizontally installed at equal intervals from top to bottom inside the drying section. The number of guide plates in each row is not less than 3, and the cross-sectional shape of the guide plate is an inverted V-shaped structure. The discharge section includes multiple discharge cone buckets fixedly connected to the drying section, and the discharge cone buckets are distributed in a matrix at the bottom of the drying section. A discharge pipe is provided at the bottom of each discharge cone bucket. A load-bearing bottom plate is fixedly installed at the lower part of the drying section, and a support box is provided below the load-bearing bottom plate. A base is fixedly provided at the bottom of the support box;

[0005] The heating mechanism comprises an air intake chamber, an exhaust chamber and a hot air furnace. The air intake chamber is arranged at one side of the drying section, and the exhaust chamber is arranged at the other side of the drying section. An air intake pipe is arranged on the air intake chamber, and a connecting pipe is arranged between the air intake pipe and the hot air outlet of the hot air furnace. An induced draft fan and an air intake regulating valve are installed on the connecting pipe. A fan is installed in the air intake chamber, and an exhaust pipe is installed on the exhaust chamber. An exhaust regulating valve is arranged on the exhaust pipe. A plurality of buffer plates are staggeredly installed up and down in the exhaust chamber. A plurality of rows of heating pipes are horizontally installed at equal intervals up and down in the drying section. Each row of heating pipes is arranged between two adjacent rows of guide plates up and down, and each row of heating pipes is staggered with two adjacent rows of guide plates up and down, and the number of heating pipes in each row is not less than 3. One end of each heating pipe is connected with the air intake chamber after passing through the drying section, and the other end of each heating pipe is connected with the exhaust chamber after passing through the drying section. At least 2 temperature sensors are arranged inside the drying section.

[0006] The unloading mechanism is arranged in the supporting box below the unloading tube, and the unloading mechanism includes a supporting plate, an upper supporting plate beam and a lower supporting plate beam. There are two upper supporting plate beams and two lower supporting plate beams. The two upper supporting plate beams are arranged horizontally at intervals, and the supporting plate is installed above the upper supporting plate beam at intervals. The supporting plate and the upper supporting plate beam are arranged vertically. The number of supporting plates corresponds to the arrangement position of the unloading cone bucket, and the upper surface of the supporting plate is slidably matched with the bottom of the unloading tube. The two lower supporting plate beams are arranged below the two upper supporting plate beams. Two supporting beams are symmetrically installed between the upper supporting plate beam and the lower supporting plate beam under each supporting plate. At least two connecting plates are installed at intervals between the two supporting beams, and 2 to 4 flexible connectors are installed between each upper supporting plate beam and the load-bearing bottom plate.

[0007] A material guide cone is installed in the support box below the material discharge mechanism, a material discharge mechanism passing through the support box is arranged below the material guide cone, and a driving mechanism for driving the material discharge mechanism to move left and right is installed on one side of the material discharge mechanism.

[0008] Furthermore, the driving mechanism includes a driving motor, a reducer, an eccentric shaft, a push rod and a pull rod. The driving motor is arranged outside the supporting box, the reducer is installed on the output shaft of the driving motor, one end of the eccentric shaft is installed on the output shaft of the reducer, one end of the push rod is rotatably installed on the other end of the eccentric shaft through a bearing, a sealing cover is installed at the end of the eccentric shaft located on one side of the push rod, a sealing ring is arranged between the sealing cover and the push rod, a positioning plate is installed at one end of the pull rod, a push plate is fixedly installed at one end of the upper support plate beam and the lower support plate beam, the positioning plate is detachably installed on the push plate, a pull rod joint is installed at the other end of the pull rod, and the other end of the push rod is inserted into the pull rod joint and is connected and fixed by bolts, nuts and gaskets. Preferably, guide wheel assemblies are provided on the upper and lower sides of the pull rod, and each set of guide wheel assemblies includes two guide plates and a guide wheel. One side of the two guide plates is fixedly mounted on the outer wall of the support box, and at least two guide rods are arranged between the two guide plates. The guide wheel is installed at the center position between the two guide plates, and the wheel surface of the guide wheel is processed into an inwardly concave arc surface structure.

[0009] Furthermore, the drying tower body comprises an inner shell and an outer shell, a closed heat preservation cavity is formed between the inner shell and the outer shell, and heat insulating glass wool is arranged in the heat preservation cavity.

[0010] Furthermore, a material guiding mechanism is arranged inside the first transition section, and the material guiding mechanism includes a material guiding motor and an adjusting plate. A cover plate is arranged obliquely above the first transition section, and a gap is left between the higher end of the cover plate and the discharge end of the feeding mechanism. The material guiding motor is mounted on the bottom surface of the cover plate, and a gear is mounted on the output shaft of the material guiding motor. A mounting plate is mounted in the first transition section below the gear, and a slide groove is arranged on the upper surface of the mounting plate, and a slider is slidably mounted in the slide groove. A slide plate is mounted above the slider, and a rack meshing with the gear is mounted on the slide plate. The adjusting plate is obliquely mounted at the end of the slide plate, and the adjusting plate is located below the discharge end of the feeding mechanism, and a gap is left between the lower end of the adjusting plate and the first transition end.

[0011] Furthermore, a material guide trough is provided between the discharge end of the feeding mechanism and the first transition section, and the material guide trough is arranged to be inclined downward.

[0012] Furthermore, the heating tube is a circular heating tube or a triangular heating tube, and further, the flexible connecting piece is a metal chain or a metal rope.

[0013] The beneficial effects of this device are:

[0014] 1. This device uses a vertical drying tower to dry the phosphate rock powder pellets. The drying tower has a large storage capacity and can dry more phosphate rock powder pellets at one time, which is beneficial to improving the production capacity of the drying tower;

[0015] 2. The drying tower body is configured as a three-section structure of a feeding section, a drying section and a discharging section. The first transition section and the second transition section provided in the feeding section can, on the one hand, evenly introduce the phosphate rock powder pellets introduced by the feeding mechanism into the drying section, and on the other hand, slow down the rising speed of heat in the drying section and reduce heat loss. The multiple rows of guide plates provided in the drying section can expand the distribution area of ​​the phosphate rock powder pellets, avoid the excessive accumulation of phosphate rock powder and affect the drying effect, and slow down the falling speed of the phosphate rock powder pellets in the drying section, which is conducive to the heating tube to fully dry the phosphate rock powder pellets. The discharging section is designed as a structure of multiple unloading cone buckets, which can evenly distribute the phosphate rock powder pellets at the bottom of the drying section, avoid the blockage of the phosphate rock powder pellets during the unloading process, and ensure the smoothness and continuity of the unloading.

[0016] 3. The structure of the heating mechanism is reasonably arranged. The hot air generated by the hot blast furnace first enters the air intake chamber under the action of the induced draft fan, and then enters the heating tube to heat and dry the phosphate rock powder pellets. The hot air absorbed by the phosphate rock powder pellets and cooled down enters the exhaust chamber uniformly, and then is discharged through the exhaust hole. The heating mechanism has high heating efficiency for the phosphate rock powder pellets, and the heating tube adopts a multi-row arrangement structure. On the one hand, the heating tube can distribute the phosphate rock powder pellets and slow down the falling speed. On the other hand, the contact area between the heating tube and the phosphate rock powder pellets is increased, which can effectively improve the drying speed, and can make the phosphate rock powder pellets dry more evenly and thoroughly, with better drying effect;

[0017] 4. The unloading mechanism can move left and right under the action of the driving mechanism. During the reciprocating movement of the unloading mechanism, the phosphate rock powder pellets discharged from the unloading pipe can fall from the gap between two adjacent supporting plates, and are collected by the guide cone bucket and then discharged out of the drying tower body through the discharging mechanism. The structure of the entire unloading mechanism is novel, which can not only realize the continuous drying operation of the phosphate rock powder pellets, but also greatly improve the drying efficiency of the device.

[0018] In summary, the device has the advantages of reasonable structural design, easy implementation, high drying efficiency, significant drying effect, and stable operation. It can produce good economic benefits and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the present invention;

[0020] Figure 2 It is a side view schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the connection structure between the blanking mechanism and the driving mechanism;

[0022] Figure 4 It is a structural schematic diagram of the material guiding mechanism;

[0023] In the figure: 1-feeding mechanism, 2-feeding section, 3-drying section, 4-discharging section, 5-material guide plate, 6-discharging cone bucket, 7-discharging pipe, 8-load-bearing bottom plate, 9-support box, 10-base, 11-intake chamber, 12-exhaust chamber, 13-hot air furnace, 14-intake pipe, 15-connecting pipe, 16-induced draft fan, 17-fan, 18-exhaust pipe, 19-buffer plate, 20-heating pipe, 21-temperature sensor, 22-support plate, 23-upper support plate beam, 24-lower support plate beam, 25-support beam, 26-connecting plate , 27-flexible connector, 28-material guide cone, 29-discharging mechanism, 30-driving motor, 31 reducer, 32-eccentric shaft, 33-push rod, 34-pull rod, 35-sealing cover, 36-positioning plate, 37-push plate, 38-pull rod joint, 39-guide plate, 40-guide wheel, 41-insulating glass wool, 42-material guide motor, 43-adjusting plate, 44-cover plate, 45-gear, 46-mounting plate, 47-slide plate, 48-material guide trough. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention belong to the protection scope of the present invention.

[0025] like Figures 1 to 4As shown, a high-efficiency drying device for producing phosphate rock powder pellets according to the present invention comprises a feeding mechanism 1, a drying tower body, a feeding mechanism and a heating mechanism, wherein the drying tower body comprises a feeding section 2, a drying section 3 and a discharging section 4 which are arranged in sequence from top to bottom, wherein the feeding section 2 comprises a first transition section and a second transition section, wherein the first transition section is a structure with a large upper end and a small lower end, and the second transition section is a structure with a small upper end and a large lower end, wherein the upper end of the first transition section is located below the discharging end of the feeding mechanism 1, and the lower end of the first transition section is fixedly connected to the upper end of the second transition section, and the first transition section and the second transition section arranged in the feeding section 2 can, on the one hand, uniformly introduce the phosphate rock powder pellets introduced by the feeding mechanism 1 into the drying section 3, and on the other hand, can slow down the rising speed of heat in the drying section 3 and reduce the heat loss, wherein the lower end of the second transition section is fixedly connected to the upper end of the drying section 3, and the interior of the drying section 3 is horizontally installed with a plurality of rows of guide plates 5 which are evenly spaced from top to bottom, and each row of guide plates is provided with a plurality ... The number of plates 5 is not less than 3, and the cross-sectional shape of the guide plate 5 is an inverted V-shaped structure. The multiple rows of guide plates 5 arranged in the drying section 3 can expand the distribution area of ​​the phosphate rock powder pellets, avoid excessive accumulation of phosphate rock powder and affect the drying effect, and can slow down the falling speed of the phosphate rock powder pellets in the drying section 3, which is conducive to the heating tube 20 to fully dry the phosphate rock powder pellets. The discharge section 4 includes a plurality of discharge cone buckets 6 fixedly connected to the drying section 3. The discharge cone buckets 6 are distributed in a matrix at the bottom of the drying section 3. A discharge pipe 7 is arranged at the bottom of each discharge cone bucket 6. The discharge section 4 is designed as a structure of multiple discharge cone buckets 6, which can evenly distribute the phosphate rock powder pellets at the bottom of the drying section 3, avoid blockage of the phosphate rock powder pellets during the discharge process, and ensure the smoothness and continuity of the discharge. A load-bearing bottom plate 8 is fixedly installed at the lower part of the drying section 3, and a support box 9 is arranged below the load-bearing bottom plate 8. A base 10 is fixedly arranged at the bottom of the support box 9.

[0026] The heating mechanism includes an air intake chamber 11, an exhaust chamber 12 and a hot air furnace 13. The air intake chamber 11 is arranged on one side of the drying section 3, and the exhaust chamber 12 is arranged on the other side of the drying section 3. The air intake chamber 11 is provided with an air intake pipe 14, and a connecting pipe 15 is provided between the air intake pipe 14 and the hot air outlet of the hot air furnace 13. The hot air furnace 13 is a prior art, and can be a coal-fired, gas-fired or biomass particle hot air furnace, as long as it can provide high-temperature hot air for the drying section 3. The connecting pipe 15 is equipped with an induced draft fan 16 and an air intake regulating valve The high-temperature hot air generated by the hot air furnace 13 is introduced into the air inlet chamber 11 by using the induced draft fan 16. The air inlet chamber 11 is equipped with a fan 17. The hot air in the air inlet chamber 11 can be evenly dispersed by using the fan 17 and evenly blown into each heating pipe 20. The exhaust chamber 12 is equipped with an exhaust pipe 18. The exhaust pipe 18 is provided with an exhaust regulating valve. Both the air inlet regulating valve and the exhaust regulating valve are electromagnetic valves. A plurality of buffer plates 19 are staggered up and down in the exhaust chamber 12. The setting of the buffer plate 19 can mitigate the high temperature to a certain extent. The flow speed of the hot air in the heating tube 20 is increased, thereby improving the utilization rate of the heat. A plurality of rows of heating tubes 20 are horizontally installed at equal intervals in the drying section 3. Each row of heating tubes 20 is arranged between two adjacent rows of guide plates 5. Each row of heating tubes 20 and the two adjacent rows of guide plates 5 are arranged in a staggered manner. The number of heating tubes 20 in each row is not less than 3. One end of each heating tube 20 passes through the drying section 3 and is connected to the air inlet chamber 11. The other end of each heating tube 20 passes through the drying section 3 and is connected to the exhaust chamber 12. The interior of the drying section 3 is provided with There are at least two temperature sensors 21, which are prior art and are used to monitor the drying temperature in the drying section 3. The heating tube 20 adopts a multi-row arrangement structure. On the one hand, the heating tube 20 can distribute the phosphate rock powder pellets and slow down the descent speed. On the other hand, the contact area between the heating tube 20 and the phosphate rock powder pellets is increased, which can effectively improve the drying speed and make the phosphate rock powder pellets dry more evenly and thoroughly, with better drying effect. Preferably, the heating tube 20 is a circular heating tube or a triangular heating tube.

[0027] The unloading mechanism is arranged in the supporting box 9 below the unloading pipe 7, and the unloading mechanism includes a supporting plate 22, an upper supporting plate beam 23 and a lower supporting plate beam 24. There are two upper supporting plate beams 23 and two lower supporting plate beams 24, and the two upper supporting plate beams 23 are arranged horizontally at intervals. The supporting plates 22 are installed above the upper supporting plate beams 23 at intervals. The supporting plates 22 and the upper supporting plate beams 23 are arranged vertically. The number of the supporting plates 22 corresponds to the arrangement position of the unloading cone bucket 6. During use, the number of the unloading cone bucket 6 is determined according to actual conditions. Preferably, the unloading cone bucket 6 is arranged There are two rows, and each row is provided with four feeding cone buckets 6, then the number of the supporting plates 22 is also four, each supporting plate 22 is located below two adjacent feeding tubes 7 in two rows, and the upper surface of the supporting plate 22 is slidably matched with the bottom of the feeding tube 7, and two lower supporting plate beams 24 are arranged below the two upper supporting plate beams 23, and two supporting beams 25 are symmetrically installed between the upper supporting plate beam 23 and the lower supporting plate beam 24 under each supporting plate 22, and at least two connecting plates 26 are installed between the two supporting beams 25, and 2 to 4 connecting plates 26 are installed between each upper supporting plate beam 23 and the load-bearing bottom plate 8. Flexible connector 27, the number of flexible connectors 27 is determined according to actual conditions, the flexible connector 27 is connected between the upper support plate beam 23 and the load-bearing bottom plate 8, can ensure the sliding connection between the support plate 22 and the discharge pipe 7, convenient for discharging; a guide cone 28 is installed in the support box 9 below the discharge mechanism, and a discharge mechanism 29 passing through the support box 9 is arranged below the guide cone 28, and a driving mechanism for driving the discharge mechanism to move left and right is installed on one side of the discharge mechanism. When the driving mechanism drives the upper support plate beam 23 and the lower support plate beam 24 to move left and right, the flexible connector 27 is connected between the upper support plate beam 23 and the load-bearing bottom plate 8, can ensure the sliding connection between the support plate 22 and the discharge pipe 7, convenient for discharging; a guide cone 28 is installed in the support box 9 below the discharge mechanism, and a discharge mechanism 29 passing through the support box 9 is arranged below the guide cone 28, and a driving mechanism for driving the discharge mechanism to move left and right is installed on one side of the discharge mechanism. The flexible connector 27 can ensure the stability of the upper support beam 23 and the lower support beam 24 during movement. Preferably, the flexible connector 27 is an iron chain. When the upper support beam 23 and the lower support beam 24 drive the supporting plate 22 to move away from the discharge pipe 7, the pellets in the discharge pipe 7 fall into the guide cone 28 from the gap between the two supporting plates 22. When the upper support beam 23 and the lower support beam 24 drive the supporting plate 22 to move back to the bottom of the discharge pipe 7, the discharge pipe 27 is blocked and the discharge is stopped. The reciprocating movement of the supporting plate 22 can realize the continuous drying operation of the drying device.

[0028] The working process of the device is: first, the induced draft fan 16 is turned on, and the hot air generated by the hot blast furnace 13 is sent into the air inlet chamber 11 through the connecting pipe 15 and the air inlet pipe 14 in turn. Under the action of the fan 17, the hot air enters each heating tube 20 respectively. At this time, the feeding mechanism 1 transports the phosphate rock powder pellets to the feeding section 2. After the phosphate rock powder pellets enter the feeding section 2, they continuously flow downward into the drying section 3. After being distributed by the guide plate 5 and the heating tube 20, the phosphate rock powder pellets gather in the drying section 3. At this time, the heat emitted by the heating tube 20 continuously dries the moisture in the phosphate rock powder pellets, dries the phosphate rock powder pellets, and the phosphate rock powder pellets absorb heat and cool down. The hot air after drying enters the exhaust chamber 12 uniformly and is then discharged through the exhaust pipe 18. In the above-mentioned drying process, the phosphate rock powder pellets fall into the discharge cone hopper 6. At this time, the driving mechanism drives the discharge mechanism to move back and forth left and right in the support box 9. During the reciprocating movement of the discharge mechanism, the supporting plate 22 will be separated from the discharge pipe 7, and then the phosphate rock powder pellets in the discharge 7 will be discharged. The discharged phosphate rock powder pellets are collected by the guide cone 28 and then discharged from the discharging mechanism 29. In this device, the coordinated use of the feeding mechanism 1, the heating mechanism, the drying tower body, the driving mechanism and the discharge mechanism can realize the continuous feeding, drying, discharge and discharge operations of the phosphate rock powder pellets.

[0029] Furthermore, the driving mechanism includes a driving motor 30, a reducer 31, an eccentric shaft 32, a push rod 33 and a pull rod 34. The driving motor 30 is a prior art reducer 31. The driving motor 30 uses a 7.5KW frequency-modulated motor, and the reducer model is bwd3-35-7.5KW. The driving motor 30 is arranged outside the supporting box 9, and the reducer 31 is installed on the output shaft of the driving motor 30. One end of the eccentric shaft 32 is installed on the output shaft of the reducer 31. One end of the push rod 33 is rotatably installed on the other end of the eccentric shaft 32 through a bearing. A sealing cover 35 is installed at the end of the eccentric shaft 32 on one side of the push rod 33. The sealing cover 35 and the push rod A sealing ring is provided between 33, a positioning plate 36 is installed at one end of the pull rod 34, a push plate 37 is fixedly installed at one end of the upper support plate beam 23 and the lower support plate beam 24, the positioning plate 36 is detachably installed on the push plate 37, a pull rod joint 38 is installed at the other end of the pull rod 34, the other end of the push rod 33 is inserted into the pull rod joint 38 and is connected and fixed by bolts, nuts and gaskets. The working principle of the driving mechanism is that the driving motor 30 drives the reducer 31 to work, the reducer 31 drives the eccentric shaft 32 to rotate, the eccentric shaft 32 drives the push rod 33 to swing during the rotation, and the push rod 33 can pull the pull rod 34 during the swinging process to drive the upper support plate beam 23 and the lower support plate beam 24 to move left and right.

[0030] In order to ensure that the pull rod 34 does not break or move during the reciprocating movement to the left and right, guide wheel assemblies are provided on the upper and lower sides of the pull rod 34, and each set of guide wheel assemblies includes two guide plates 39 and a guide wheel 40. One side of the two guide plates 39 is fixedly mounted on the outer wall of the support box 9, and at least two guide rods are arranged between the two guide plates 39. The guide wheel 40 is installed at the center position between the two guide plates 39, and the wheel surface of the guide wheel 40 is processed into an inwardly concave arc surface structure. The pull rod 34 moves between the two guide wheels 40. The guide wheel 40 has a guiding function for the pull rod 34, and can ensure the stability of the pull rod 34 during the movement to the left and right.

[0031] Furthermore, in order to improve the drying effect of the drying tower body, the drying tower body includes an inner shell and an outer shell, and a closed insulation chamber is formed between the inner shell and the outer shell. Insulating glass wool 41 is arranged in the insulation chamber. The insulating glass wool 41 has the function of heat preservation and heat insulation, which can prevent heat loss in the drying tower body.

[0032] Furthermore, a material guiding mechanism is arranged inside the first transition section, and the material guiding mechanism includes a material guiding motor 42 and an adjusting plate 43. The material guiding motor 42 is of prior art. A cover plate 44 is arranged obliquely above the first transition section, and a gap is left between the higher end of the cover plate 44 and the discharging end of the feeding mechanism 1. The material guiding motor 42 is mounted on the bottom surface of the cover plate 44, and a gear 45 is mounted on the output shaft of the material guiding motor 44. A mounting plate 46 is mounted in the first transition section below the gear 45, and a slide groove is arranged on the upper surface of the mounting plate 46, and a slider is slidably mounted in the slide groove, and a slide plate 47 is mounted above the slider. The slide plate 47 is provided with a rack meshing with the gear 45, the adjustment plate 43 is obliquely installed at the end of the slide plate 47, and the adjustment plate 43 is located below the discharge end of the feeding mechanism 1, and a gap is left between the lower end of the adjustment plate 43 and the first transition end. The provided material guiding mechanism can effectively control the discharge amount of the phosphate rock powder pellets. When in use, the material guiding motor 42 drives the gear 45 to rotate, and the gear 45 drives the slide plate 47 and the adjustment plate 43 to reciprocate through the rack during the rotation process. During the movement of the adjustment plate 43, the gap between the adjustment plate 43 and the first transition section can be increased or decreased, thereby adjusting the discharge amount of the phosphate rock powder pellets.

[0033] In order to enable the phosphate rock powder pellets to be quickly introduced into the feeding section 2 through the feeding mechanism 1, a guide trough 48 is provided between the discharge end of the feeding mechanism 1 and the first transition section, and the guide trough 48 is arranged to be inclined downward.

Claims

1. A high-efficiency drying device for producing phosphate rock powder pellets, characterized in that: It comprises a feeding mechanism (1), a drying tower body, a feeding mechanism and a heating mechanism. The drying tower body comprises a feeding section (2), a drying section (3) and a discharging section (4) which are arranged in sequence from top to bottom. The feeding section (2) comprises a first transition section and a second transition section. The first transition section is a structure with a large upper end and a small lower end, and the second transition section is a structure with a small upper end and a large lower end. The upper end of the first transition section is located below the discharging end of the feeding mechanism (1). The lower end of the first transition section is fixedly connected to the upper end of the second transition section, and the lower end of the second transition section is fixedly connected to the upper end of the drying section (3). The interior of the drying section (3) is horizontally installed with multiple equal-spaced sections from top to bottom. A material discharge guide plate (5), wherein the number of the material discharge guide plates (5) in each row is not less than 3, the cross-sectional shape of the material discharge plate (5) is an inverted V-shaped structure, the material discharge section (4) comprises a plurality of material discharge cone buckets (6) fixedly connected to the drying section (3), the material discharge cone buckets (6) are arranged in a matrix at the bottom of the drying section (3), a material discharge pipe (7) is arranged at the bottom of each material discharge cone bucket (6), a load-bearing bottom plate (8) is fixedly installed at the lower part of the drying section (3), a support box (9) is arranged below the load-bearing bottom plate (8), and a base (10) is fixedly arranged at the bottom of the support box (9); The heating mechanism comprises an air intake chamber (11), an exhaust chamber (12) and a hot air furnace (13); the air intake chamber (11) is arranged on one side of the drying section (3); the exhaust chamber (12) is arranged on the other side of the drying section (3); an air intake pipe (14) is arranged on the air intake chamber (11); a connecting pipe (15) is arranged between the air intake pipe (14) and the hot air outlet of the hot air furnace (13); an induced draft fan (16) and an air intake regulating valve are installed on the connecting pipe (15); a fan (17) is installed in the air intake chamber (11); an exhaust pipe (18) is installed on the exhaust chamber (12); an exhaust regulating valve is installed on the exhaust pipe (18); A plurality of buffer plates (19) are staggeredly installed in the exhaust chamber (12) in an upper and lower manner, a plurality of rows of heating tubes (20) are horizontally installed in the drying section (3) at equal intervals in an upper and lower manner, each row of heating tubes (20) is arranged between two upper and lower adjacent rows of material guide plates (5), each row of heating tubes (20) and two upper and lower adjacent rows of material guide plates (5) are staggeredly arranged, and the number of heating tubes (20) in each row is not less than 3, one end of each heating tube (20) passes through the drying section (3) and communicates with the air inlet chamber (11), and the other end of each heating tube (20) passes through the drying section (3) and communicates with the exhaust chamber (12), and at least two temperature sensors (21) are arranged inside the drying section (3); The unloading mechanism is arranged in a supporting box (9) below the unloading pipe (7), and comprises a supporting plate (22), an upper supporting plate beam (23) and a lower supporting plate beam (24). The upper supporting plate beam (23) and the lower supporting plate beam (24) are both two, and the two upper supporting plate beams (23) are arranged horizontally at intervals. The supporting plates (22) are installed above the upper supporting plate beam (23) at intervals. The supporting plates (22) and the upper supporting plate beam (23) are arranged vertically. The number of the supporting plates (22) is consistent with the arrangement of the unloading cone bucket (6). The positions of the support plates (22) correspond to each other, and the upper surface of the support plate (22) is slidably matched with the bottom of the feed tube (7), two lower support plate beams (24) are arranged below the two upper support plate beams (23), two support beams (25) are symmetrically installed between the upper support plate beam (23) and the lower support plate beam (24) below each support plate (22), at least two connecting plates (26) are installed between the two support beams (25), and 2 to 4 flexible connectors (27) are installed between each upper support plate beam (23) and the load-bearing bottom plate (8); A material guide cone (28) is installed in the support box (9) below the material discharge mechanism, a material discharge mechanism (29) is provided below the material guide cone (28) and extends out of the support box (9), and a driving mechanism for driving the material discharge mechanism to move left and right is installed on one side of the material discharge mechanism; The driving mechanism comprises a driving motor (30), a speed reducer (31), an eccentric shaft (32), a push rod (33) and a pull rod (34); the driving motor (30) is arranged outside the supporting box (9); the speed reducer (31) is mounted on the output shaft of the driving motor (30); one end of the eccentric shaft (32) is mounted on the output shaft of the speed reducer (31); one end of the push rod (33) is rotatably mounted on the other end of the eccentric shaft (32) via a bearing; and a pull rod (34) is mounted at the end of the eccentric shaft (32) located on one side of the push rod (33). A sealing cover (35) is installed, a sealing ring is provided between the sealing cover (35) and the push rod (33), a positioning plate (36) is installed at one end of the pull rod (34), a push plate (37) is fixedly installed at one end of the upper support plate beam (23) and the lower support plate beam (24), the positioning plate (36) is detachably installed on the push plate (37), a pull rod joint (38) is installed at the other end of the pull rod (34), and the other end of the push rod (33) is inserted into the pull rod joint (38) and is connected and fixed by bolts, nuts and gaskets; A material guide trough (48) is provided between the discharge end of the feeding mechanism (1) and the first transition section, and the material guide trough (48) is arranged to be inclined downward.

2. The high-efficiency drying device for producing phosphate rock powder pellets according to claim 1 is characterized in that: Guide wheel assemblies are provided on the upper and lower sides of the pull rod (34), and each set of guide wheel assemblies includes two guide plates (39) and a guide wheel (40). One side of the two guide plates (39) is fixedly mounted on the outer wall of the support box (9), and at least two guide rods are arranged between the two guide plates (39). The guide wheel (40) is installed at the center position between the two guide plates (39), and the wheel surface of the guide wheel (40) is processed into an inwardly concave arc surface structure.

3. The high-efficiency drying device for producing phosphate rock powder pellets according to claim 1 is characterized in that: The drying tower body comprises an inner shell and an outer shell, a sealed heat-insulating cavity is formed between the inner shell and the outer shell, and heat-insulating glass wool (41) is arranged in the heat-insulating cavity.

4. The high-efficiency drying device for producing phosphate rock powder pellets according to claim 1 is characterized in that: A material guide mechanism is arranged inside the first transition section, the material guide mechanism comprising a material guide motor (42) and an adjustment plate (43); a cover plate (44) is arranged obliquely above the first transition section, a gap is left between the higher end of the cover plate (44) and the discharge end of the feeding mechanism (1); the material guide motor (42) is mounted on the bottom surface of the cover plate (44); a gear (45) is mounted on the output shaft of the material guide motor (44); a mounting plate (46) is mounted in the first transition section below the gear (45); a slide groove is arranged on the upper surface of the mounting plate (46); a slider is slidably mounted in the slide groove; a slide plate (47) is mounted above the slider; a rack meshing with the gear (45) is mounted on the slide plate (47); the adjustment plate (43) is obliquely mounted at the end of the slide plate (47); the adjustment plate (43) is located below the discharge end of the feeding mechanism (1); a gap is left between the lower end of the adjustment plate (43) and the first transition end.

5. The high-efficiency drying device for producing phosphate rock powder pellets according to claim 1 is characterized in that: The heating tube (20) is a circular heating tube or a triangular heating tube.

6. The high-efficiency drying device for producing phosphate rock powder pellets according to claim 1, characterized in that: The flexible connecting piece (27) is a metal chain or a metal rope.

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