Improved phosphate drying tail gas recovery system

Abstract

The invention relates to the technical field of phosphate drying, in particular to an improved phosphate drying tail gas recovery system. Comprising a spiral feeding machine, a drying cylinder, an air heater, a cyclone separator and a suction fan. The drying cylinder is arranged to be vertical, so that the occupied area of the drying cylinder is reduced, the site cost can be reduced, the production line layout can be optimized, the devices are compact, and installation and operation by operators are facilitated; by arranging a spiral plate, phosphate in the inner barrel can be continuously conveyed from bottom to top by the spiral plate, so that the phosphate can be close to the air inlet pipe, hot air entering the air inlet pipe can quickly dry the phosphate, and the drying uniformity of the phosphate in the drying barrel is guaranteed; the drying efficiency of phosphate is improved, the phosphate close to the air inlet pipe is prevented from being overheated or scorched, and then the drying quality of the phosphate is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of phosphate drying, in particular to an improved phosphate drying tail gas recovery system. Background Art

[0002] Drying is an important step in the production of food phosphates. Phosphates will absorb moisture or deteriorate in a humid environment, resulting in unstable product quality. By drying phosphates, moisture in the product can be removed, reducing the risk of moisture absorption, making the final product more stable and easier to store. There are also some technical solutions for phosphate drying tail gas recovery systems in the prior art. For example, a Chinese patent with publication number CN219390319U discloses a phosphate drying tail gas recovery system, including a drying cylinder, an inner liner is provided inside the drying cylinder, and an interlayer is provided between the drying cylinder and the inner liner, a cyclone separator is provided at one end of the drying cylinder, a material pipe is provided between the cyclone separator and the inner liner, and an exhaust pipe is installed above the cyclone separator, a suction fan is provided at the other end of the exhaust pipe, and a recovery pipe is fixed to the air outlet of the suction fan, an opening is provided on the circumference of one end of the drying cylinder close to the cyclone separator, and a connecting ridge is provided inside the opening, and a sealing ring is rotatably installed inside the opening, and the recovery pipe is fixedly connected to the sealing ring. The utility model provides an interlayer between the drying cylinder and the inner liner, and the hot air flow discharged from the cyclone separator is transported to the inside of the interlayer through the recovery pipe, that is, the heat can isolate the heat inside the inner liner from the cold air outside, reduce heat loss, and improve drying efficiency; This solution uses a horizontal drying drum to dry the phosphate. However, when drying the phosphate, the horizontal drying drum needs to be longer to ensure that the phosphate has sufficient contact time with the hot air, thereby effectively evaporating the water in the phosphate. The longer drum can prolong the residence time of the phosphate in the drum to ensure sufficient drying effect for the phosphate. However, the longer drying drum requires a larger ground space, which not only increases the site cost, but also complicates the layout of the production line, affecting the installation and operation process of other equipment. In addition, when the hot air flows in the drying drum, the hot air will drive the moisture volatilized by the phosphate to flow synchronously, so that the humidity of the hot air just entering the drying drum is low, while the humidity of the hot air flowing out of the drying drum is high. Therefore, in the drying drum, as the hot air flows from the air inlet pipe to the air outlet, the humidity of the hot air gradually increases, and the drying capacity gradually weakens; this makes the drying effect of the phosphate in the drying drum uneven, and for this, it is necessary to extend the drying time so that the phosphate in the area near the air outlet can be fully dried, which not only reduces the drying efficiency of the phosphate, but also causes the phosphate in the area near the air inlet pipe of the drying drum to overheat or burn, thereby affecting the drying quality of the phosphate; In view of this, in order to overcome the above technical problems, the present invention proposes an improved phosphate drying tail gas recovery system to solve the above technical problems. Summary of the invention

[0003] In order to make up for the shortcomings of the prior art, the present invention proposes an improved phosphate drying tail gas recovery system. The present invention reduces the floor space of the drying cylinder by arranging the drying cylinder to be vertical, which not only reduces the site cost, but also optimizes the layout of the production line, and the equipment is relatively compact, which is convenient for operators to install and operate; thereby improving production efficiency, and the arrangement of the spiral plate enables the spiral plate to continuously transport the phosphate in the inner cylinder from bottom to top, so that the phosphate can be close to the air inlet pipe, so that the hot air entering the air inlet pipe can quickly dry the phosphate, thereby ensuring the drying uniformity of the phosphate in the drying cylinder, not only improving the drying efficiency of the phosphate, but also avoiding overheating or burning of the phosphate close to the air inlet pipe, thereby ensuring the drying quality of the phosphate.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an improved phosphate drying tail gas recovery system described in the present invention comprises: A spiral feeder, a drying cylinder, a hot air blower, a cyclone separator and a suction fan; a feed pipe and an air inlet pipe connected to the inside of the drying cylinder are installed at the upper end of the drying cylinder; a discharge port is opened at the lower end of the drying cylinder; the spiral feeder is connected to the feed pipe of the drying cylinder; the hot air blower is connected to the air inlet pipe of the drying cylinder; the cyclone separator is connected to the lower end of the drying cylinder; the suction fan is connected to the cyclone separator; Spiral plate, the drying cylinder comprises an inner cylinder, an outer cylinder and a cylinder cover; the inner cylinder is located inside the outer cylinder; the inner cylinder is fixedly connected to the bottom of the outer cylinder; the surface of the inner cylinder is provided with an inclined groove connected to the outer cylinder; the cylinder cover is fixedly installed on the upper end of the outer cylinder; the outer cylinder is provided with a spiral cavity connected to the outside; the end of the spiral cavity away from the outside penetrates the inner wall of the outer cylinder; a solenoid valve is fixedly installed in the spiral cavity; the spiral plate is located between the inner cylinder and the outer cylinder; the spiral plate is in sliding sealing contact with the inner cylinder and the outer cylinder; A rotating plate, a through groove is provided on the upper end of the cylinder cover; the rotating plate is rotatably sealed and connected in the through groove; the lower end of the rotating plate is fixedly connected to the spiral plate by a connecting rod; a worm wheel is fixedly connected to the upper end of the rotating plate; a worm meshing with the worm wheel is provided on one side of the worm wheel; the worm is rotatably connected to the cylinder cover; a driving motor is fixedly installed on the upper end of the cylinder cover; the driving motor is used to drive the worm to rotate; the feed pipe is rotatably sealed and connected to the rotating plate; a blocking unit is installed in the discharge port; the blocking unit is used to block the undried phosphate from entering the discharge port.

[0005] Preferably, the spiral plate includes a spiral frame and a roller; the roller is rotatably connected to the spiral frame; a transmission belt is sleeved on the surface of the roller; the transmission belt is spiral-shaped; cylindrical grooves are opened at both ends of the roller; a spur gear ring is fixedly connected in the cylindrical groove; an elastic strip is fixedly connected to a side of the transmission belt close to the roller; the elastic strip is made of PTFE material; the lower end of the elastic strip is close to the tooth groove meshing with the spur gear ring; a driving unit is installed inside the spiral frame; the driving unit is used to drive the roller to rotate; a shovel plate is fixedly installed on the end of the spiral frame away from the cylinder cover.

[0006] Preferably, the driving unit includes a ceramic motor; a bevel gear shaft and a bevel gear ring are arranged inside the spiral frame; the bevel gear shaft is fixedly connected to the output shaft of the ceramic motor; the bevel gear ring is fixedly connected to one end of the rotating roller close to the ceramic motor; the bevel gear shaft is meshed with the bevel gear ring.

[0007] Preferably, the driving unit includes a driving wheel; the driving wheel is located below the spiral frame; the driving wheel is in rolling contact with the inner wall of the outer cylinder; the driving wheel and the roller are connected through a bevel gear set; the bevel gear set includes a bevel gear ring and a bevel gear shaft that mesh with each other; the bevel gear shaft is fixedly connected to the driving wheel; and the bevel gear ring is fixedly connected to the roller.

[0008] Preferably, a protrusion is fixedly connected to the surface of the driving wheel; the protrusion is made of silicone rubber material.

[0009] Preferably, the protrusions on the surface of the driving wheel are arranged in five groups; each group of protrusions is distributed in a V-shape on the surface of the driving wheel.

[0010] Preferably, an annular groove connected to the air inlet pipe is formed on the inner wall of the through groove; an air jet groove is formed on the upper end surface of the spiral frame; an air passage is formed inside the connecting rod; one end of the air passage passes through the rotating plate and is connected to the annular groove, and the other end passes through the spiral frame and is connected to the air jet groove.

[0011] Preferably, the blocking unit includes a blocking block; the bottom of the inner cylinder is configured to be a frustum; a mounting groove connected to a discharge port is provided at the bottom of the inner cylinder; the blocking block is slidably connected in the mounting groove; the blocking block is fixedly connected to the bottom of the mounting groove by a connecting spring; an electromagnetic ring is inlaid at the bottom of the mounting groove; a discharge port connected to the discharge port is provided on the outer wall of the blocking block; and the upper end surface of the blocking block is configured to be conical.

[0012] Preferably, a groove is provided at the bottom of the inner cylinder; a swivel is connected in a sliding seal in the groove; the swivel is fixedly connected to the bottom of the groove by a supporting spring; an electromagnetic sheet is inlaid at the bottom of the groove; an annular elastic sheet is provided at the bottom of the inner cylinder; the outer ring wall of the elastic sheet is fixedly connected to the swivel; and the inner ring wall of the elastic sheet is fixedly connected to the bottom of the inner cylinder.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention reduces the floor space of the drying drum by arranging the drying drum to be vertical, which not only reduces site costs but also optimizes the layout of the production line. The equipment is relatively compact, which is convenient for operators to install and operate. The production efficiency is thereby improved. The arrangement of the spiral plate enables the spiral plate to continuously transport the phosphate in the inner drum from bottom to top, so that the phosphate can be close to the air inlet pipe, so that the hot air entering the air inlet pipe can quickly dry the phosphate, thereby ensuring the drying uniformity of the phosphate in the drying drum, which not only improves the drying efficiency of the phosphate, but also avoids overheating or burning of the phosphate close to the air inlet pipe, thereby ensuring the drying quality of the phosphate.

[0014] 2. The present invention sets an air jet groove so that the hot air ejected from the air jet groove can evenly penetrate the phosphate layer on the transmission belt, so that the hot air flow can contact every part of the phosphate, thereby effectively promoting heat transfer and enhancing heat exchange efficiency, so that the moisture in the phosphate evaporates more quickly, thereby improving the drying effect of the phosphate, further improving the drying speed of the phosphate, and improving the practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0016] Figure 1 It is a structural schematic diagram of the improved phosphate drying tail gas recovery system of the present invention; Figure 2 It is a schematic diagram of the structure of the drying drum used in the present invention; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 yes Figure 2 The enlarged view of point B in the middle; Figure 5 yes Figure 2 Enlarged view of point C in the middle; Figure 6 It is a structural schematic diagram of a drying drum equipped with a driving wheel in the present invention; Figure 7 yes Figure 6 The enlarged view of point D in the middle; Figure 8 is a three-dimensional diagram of a spiral plate used in the present invention; Fig. 9 is a perspective view of a driving wheel used in the present invention; In the figure: 1. drying cylinder; 11. spiral feeder; 12. hot air blower; 13. cyclone separator; 14. suction fan; 15. inner cylinder; 151. inclined slot; 16. outer cylinder; 161. discharge port; 162. spiral chamber; 17. cylinder cover; 171. feed pipe; 172. air inlet pipe; 173. through slot; 18. rotating plate; 181. connecting rod; 182. worm gear; 183. worm; 184. driving motor; 185. annular groove; 186. airway; 2. spiral plate; 21. spiral frame; 22. roller; 2 21. Transmission belt; 222. Cylindrical groove; 223. Spur gear ring; 224. Elastic strip; 225. Tooth groove; 23. Shovel plate; 24. Ceramic motor; 241. Bevel gear shaft; 242. Bevel gear ring; 25. Jet groove; 3. Driving wheel; 31. Bevel gear ring; 32. Bevel gear shaft; 33. Protrusion; 4. Stop block; 41. Mounting groove; 42. Connecting spring; 43. Electromagnetic ring; 44. Discharge port; 45. Groove; 46. Swivel; 461. Support spring; 462. Electromagnetic sheet; 47. Elastic sheet. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figures 1 to 9 As shown, the improved phosphate drying tail gas recovery system of the present invention includes the following embodiments: Embodiment 1:

[0019] An improved phosphate drying tail gas recovery system, comprising: A spiral feeder 11, a drying cylinder 1, a hot air blower 12, a cyclone separator 13 and a suction fan 14; a feed pipe 171 and an air inlet pipe 172 connected to the inside of the drying cylinder 1 are installed at the upper end of the drying cylinder 1; a discharge port 161 is opened at the lower end of the drying cylinder 1; the spiral feeder 11 is connected to the feed pipe 171 of the drying cylinder 1; the hot air blower 12 is connected to the air inlet pipe 172 of the drying cylinder 1; the cyclone separator 13 is connected to the lower end of the drying cylinder 1; the suction fan 14 is connected to the cyclone separator 13; Spiral plate 2, the drying cylinder 1 comprises an inner cylinder 15, an outer cylinder 16 and a cylinder cover 17; the inner cylinder 15 is located inside the outer cylinder 16; the inner cylinder 15 is fixedly connected to the bottom of the outer cylinder 16; the surface of the inner cylinder 15 is provided with an inclined groove 151 connected with the outer cylinder 16; the cylinder cover 17 is fixedly installed on the upper end of the outer cylinder 16; the outer cylinder 16 is provided with a spiral cavity 162 connected with the outside; the end of the spiral cavity 162 away from the outside penetrates the inner wall of the outer cylinder 16; a solenoid valve is fixedly installed in the spiral cavity 162; the spiral plate 2 is located between the inner cylinder 15 and the outer cylinder 16; the spiral plate 2 is in sliding sealing contact with the inner cylinder 15 and the outer cylinder 16; The rotating plate 18 and the upper end of the cylinder cover 17 are provided with a through groove 173; the rotating plate 18 is rotatably sealed and connected in the through groove 173; the lower end of the rotating plate 18 is fixedly connected to the spiral plate 2 by a connecting rod 181; a worm wheel 182 is fixedly connected to the upper end of the rotating plate 18; a worm 183 meshing with the worm wheel 182 is provided on one side; the worm 183 is rotatably connected to the cylinder cover 17; a driving motor 184 is fixedly installed on the upper end of the cylinder cover 17; the driving motor 184 is used to drive the worm 183 to rotate; the feeding pipe 171 is rotatably sealed and connected to the rotating plate 18; a blocking unit is installed in the discharge port 161; the blocking unit is used to block the undried phosphate from entering the discharge port 161.

[0020] In this embodiment, the spiral plate 2 includes a spiral frame 21 and a roller 22; the roller 22 is rotatably connected to the spiral frame 21; a transmission belt 221 is sleeved on the surface of the roller 22; the transmission belt 221 is spiral; cylindrical grooves 222 are opened at both ends of the roller 22; a spur gear ring 223 is fixedly connected in the cylindrical groove 222; an elastic strip 224 is fixedly connected to the side of the transmission belt 221 close to the roller 22; the elastic strip 224 is made of PTFE material; the lower end of the elastic strip 224 is close to the tooth groove 225 meshing with the spur gear ring 223; a driving unit is installed inside the spiral frame 21; the driving unit is used to drive the roller 22 to rotate; a shovel plate 23 is fixedly installed at the end of the spiral frame 21 away from the cylinder cover 17.

[0021] In this embodiment, the driving unit includes a ceramic motor 24; a bevel gear shaft 241 and a bevel gear ring 242 are arranged inside the spiral frame 21; the bevel gear shaft 241 is fixedly connected to the output shaft of the ceramic motor 24; the bevel gear ring 242 is fixedly connected to one end of the rotating roller 22 close to the ceramic motor 24; the bevel gear shaft 241 is meshed with the bevel gear ring 242.

[0022] In this embodiment, an annular groove 185 connected to the air inlet pipe 172 is formed on the inner wall of the through groove 173; an air jet groove 25 is formed on the upper end surface of the spiral frame 21; an air duct 186 is formed inside the connecting rod 181; one end of the air duct 186 passes through the rotating plate 18 and is connected to the annular groove 185, and the other end passes through the spiral frame 21 and is connected to the air jet groove 25.

[0023] In this embodiment, the blocking unit includes a blocking block 4; the bottom of the inner cylinder 15 is set to be a cone shape; the bottom of the inner cylinder 15 is provided with a mounting groove 41 connected to the discharge port 161; the blocking block 4 is slidably connected in the mounting groove 41; the blocking block 4 is fixedly connected to the bottom of the mounting groove 41 by a connecting spring 42; the bottom of the mounting groove 41 is inlaid with an electromagnetic ring 43; the outer wall of the blocking block 4 is provided with a discharge port 44 connected to the discharge port 161; the upper end face of the blocking block 4 is set to be conical.

[0024] In this embodiment, a groove 45 is provided at the bottom of the inner cylinder 15; a rotating ring 46 is connected in a sliding seal in the groove 45; the rotating ring 46 is fixedly connected to the bottom of the groove 45 by a supporting spring 461; an electromagnetic sheet 462 is embedded in the bottom of the groove 45; an annular elastic sheet 47 is provided at the bottom of the inner cylinder 15; the outer ring wall of the elastic sheet 47 is fixedly connected to the rotating ring 46; the inner ring wall of the elastic sheet 47 is fixedly connected to the bottom of the inner cylinder 15; During operation, the existing drying drum 1 dries the phosphate. However, when the horizontal drying drum 1 dries the phosphate, in order to ensure that the phosphate has sufficient contact time with the hot air, so as to effectively evaporate the water in the phosphate, the drying drum 1 needs to be longer. The longer cylinder can prolong the residence time of the phosphate in the cylinder, so as to ensure that the phosphate is provided with a sufficient drying effect. However, the longer drying drum 1 requires a larger ground space, which not only increases the site cost, but also complicates the layout of the production line, affecting the installation and operation process of other equipment. In addition, when the hot air flows in the drying drum 1, the hot air will drive the moisture volatilized by the phosphate to flow synchronously, so that the humidity of the hot air just entering the drying drum 1 is low, while the humidity of the hot air flowing out of the drying drum 1 is high. Therefore, in the drying drum 1, as the hot air flows from the air inlet pipe 172 to the air outlet, the humidity of the hot air gradually increases, and the drying capacity gradually weakens; this makes the drying effect of the phosphate in the drying drum 1 uneven, and for this, it is necessary to extend the drying time so that the phosphate in the area near the air outlet can be fully dried, which not only reduces the drying efficiency of the phosphate, but also causes the phosphate in the area near the air inlet pipe 172 of the drying drum 1 to overheat or burn, thereby affecting the drying quality of the phosphate; In this regard, the present invention reduces the floor space of the drying drum 1 by setting the drying drum 1 to be vertical, which not only reduces the site cost, but also optimizes the layout of the production line, and the equipment is relatively compact, which is convenient for operators to install and operate; thereby improving production efficiency, and the setting of the spiral plate 2 enables the spiral plate 2 to continuously transport the phosphate in the inner drum 15 from bottom to top, so that the phosphate can be close to the air inlet pipe, so that the hot air entering the air inlet pipe can quickly dry the phosphate, thereby ensuring the drying uniformity of the phosphate in the drying drum 1, not only improving the drying efficiency of the phosphate, but also avoiding overheating or burning of the phosphate close to the air inlet pipe 172, thereby ensuring the drying quality of the phosphate; In the initial state, the control electromagnetic ring 43 is energized, so that the electromagnetic ring 43 can absorb the blocking block 4 and squeeze the connecting spring 42 into the installation groove 41, so that the conical end of the blocking block 4 and the bottom of the inner cylinder 15 are on the same conical surface. At this time, the electromagnetic valve in the spiral chamber 162 is in an open state, and the feed pipe 171 is rotatably sealed and connected with the rotating plate 18. The spiral feeder 11 conveys phosphate into the drying cylinder 1 through the feed pipe 171 above the drying cylinder 1, so that the phosphate falls into the bottom of the inner cylinder 15; because the blocking block 4 entering the installation groove 41 and the bottom of the inner cylinder 15 form the same cone, the phosphate falling to the conical surface will slide down along the conical surface toward the inner wall of the inner cylinder 15, and because the cylinder wall of the inner cylinder 15 is provided with an inclined groove 151, and the inclined groove 1 Position 51 is close to the lower end surface of the inner cylinder 15, so that the phosphate sliding to the wall of the inner cylinder 15 will slide into between the outer cylinder 16 and the inner cylinder 15 through the inclined groove 151. At this time, the driving motor 184 is controlled to operate, so that the driving motor 184 can drive the worm wheel 182 to rotate through the worm 183 fixedly connected to its output shaft, so that the worm wheel 182 drives the rotating plate 18 fixedly connected to it to rotate, so that the rotating plate 18 can drive the spiral plate 2 to rotate between the inner cylinder 15 and the outer cylinder 16 through the connecting rod 181 during the rotation process. During the rotation of the spiral plate 2, the spiral frame 21 of the spiral plate 2 will drive the shovel plate 23 at the lower end to slide along the bottom of the outer cylinder 16, so that the shovel plate 23 will shovel up the phosphate that falls to the bottom of the outer cylinder 16; at this time, the ceramic motor 24 is controlled to operate, The ceramic motor 24 can drive the bevel gear shaft 241 to rotate, so that the bevel gear shaft 241 drives the roller 22 to rotate through the bevel gear ring 242 meshing therewith, so that the roller 22 can drive the transmission belt 221 to wrap around the spiral frame 21. In order to ensure that the roller 22 can stably drive the transmission belt 221, a spur gear ring 223 is provided, so that during the rotation of the roller 22, the roller 22 can drive the spur gear ring 223 fixed in the cylindrical groove 222 of the roller 22 to rotate, so that the spur gear ring 223 drives the transmission belt 221 to wrap around the spiral frame 21 through the elastic strip 224 meshing therewith; thereby improving the transmission efficiency and transmission stability between the roller 22 and the transmission belt 221, and avoiding the transmission belt 22 1 The problem of slippage or skidding on the surface of the roller 22 is effectively improved. Different types of phosphates require different drying temperatures. For example, some food-grade phosphates are prone to thermal degradation in a high-temperature environment. In order to maintain their quality and safety, they need to be dried at a low temperature of 50-50°C. Industrial-grade phosphates are usually more tolerant to temperature changes and can be dried at a medium temperature of 100-200°C or a high temperature of 200-300°C. By setting the ceramic motor 24, the ceramic motor 24 has excellent high-temperature resistance. Therefore, when the industrial-grade phosphate needs to be dried, the ceramic motor 24 can still operate normally and stably in the drying drum 1.This not only ensures that the present invention can operate normally and stably, but also enables the present invention to perform medium-temperature drying or high-temperature drying on industrial-grade phosphate, thereby increasing the scope of application of the present invention and further improving the practicality of the present invention; and the PTFE material has good high-temperature resistance, so that the elastic strip 224 can still be used normally and stably in a high-temperature drying environment of 200-300°C; In the initial state, an inclined plate is provided above the inner cylinder 15; the inclined plate is fixedly connected to the upper end of the spiral frame 21; when the transmission belt 221 lifts the phosphate to the upper side of the inner cylinder 15, the transmission belt 221 passes over the uppermost roller 22 and rotates toward the lower end surface of the spiral frame 21; at this time, the phosphate on the transmission belt 221 falls to the upper end of the inclined plate under the action of its own gravity, so that the phosphate falling on the inclined plate slides along the inclined surface of the inclined plate into the inner cylinder 15; in the process of the transmission belt 221 transporting the phosphate upward, the hot air blower 12 runs and conveys the hot air flow into the air inlet pipe 172, so that the hot air flow entering the air inlet pipe 172 can flow into the annular groove 185; since the upper end of the spiral frame 21 is provided with an air jet groove 25, and the air jet groove 25 is connected with the annular groove 185 through the air passage 186, the hot air flow entering the annular groove 185 will enter the air jet groove 25 through the air passage 186, so that the hot air flow is ejected through the upper end of the air jet groove 25, and the transmission belt 221 is set as a woven belt of PTFE material, so that the PTFE woven belt has excellent chemical resistance and wear resistance, can resist the corrosion of phosphate, and the woven belt has a good pore structure, so that the hot air flow ejected from the air jet groove 25 penetrates the transmission belt 221 and is transmitted to the phosphate transported at the upper end of the transmission belt 221, so that In the process of transporting phosphate, the transmission belt 221 enables the phosphate to be constantly in contact with the dry hot air flow, thereby accelerating the drying efficiency of the phosphate; and the hot air ejected from the jet slot 25 can evenly penetrate the phosphate layer on the transmission belt 221, so that the hot air flow can contact every part of the phosphate, thereby effectively promoting the heat transfer, and enhancing the heat exchange efficiency, so that the moisture in the phosphate evaporates more quickly, improving the drying effect of the phosphate, and further increasing the drying speed of the phosphate, so that the practicality of the present invention is improved; because the solenoid valve in the spiral chamber 162 is in an open state, In the process of the hot air flow ejected from the jet slot 25 rising, the hot air flow will carry the moisture of the phosphate recovery force and rise to the upper port where the spiral chamber 162 and the outer cylinder 16 are connected, so that the hot air flow containing moisture is discharged through the spiral chamber 162. When the hot air flow is discharged through the spiral chamber 162, the hot air flow will be heated by the outer cylinder 16, so that the external cold air exchanges heat with the hot air flow in the spiral chamber 162 through the outer wall of the outer cylinder 16, avoiding the heat exchange between the hot air flow inside the outer cylinder 16 and the external cold air, thereby reducing heat loss and improving the drying effect of the hot air flow inside the outer cylinder 16; so that the practicality of the present invention is further improved; When the phosphate is dried, the solenoid valve is controlled to close. At this time, the solenoid ring 43 is controlled to be de-energized, so that the blocking block 4 extends out of the mounting slot 41 under the push of the restoring force of the connecting spring 42, so that the blocking block 4 drives the surface discharge port 44 to extend out of the mounting slot 41. At this time, the cyclone separator 13 and the suction fan 14 are controlled to operate, so that the suction fan 14 generates a negative pressure suction force on the discharge port 161 through the cyclone separator 13, so that the dried phosphate inside the inner cylinder 15 can flow into the discharge port 161 through the discharge port 44 on the surface of the blocking block 4 under the action of the negative pressure suction force, so that the phosphate entering the discharge port 161 enters the cyclone separator 13, so that the dry phosphate falls downward into the cyclone separator 13 under the action of gravity, and the gas flows upward into the suction fan 14; because the lower end of the inner cylinder 15 is a frustum, and the blocking block 4 is located at a higher position in the center of the inner cylinder 15, the last few phosphates cannot fall into the blocking block 4. For this purpose, the present invention arranges an elastic sheet 47, and the inner surface of the elastic sheet 47 The annular wall is directly opposite to the notch of the mounting groove 41. In the initial state, the electromagnetic sheet 462 absorbs the rotating ring 46 and enters the groove 45, so that the rotating ring 46 drives the elastic sheet 47 to cover the bottom end of the cone of the inner cylinder 15. The elastic sheet 47 is made of PTFE material; when the phosphate accumulation surface of the inner cylinder 15 is lower than the notch of the mounting groove 41, the electromagnetic sheet 462 is controlled to be powered off, so that the electromagnetic sheet 462 no longer absorbs the rotating ring 46, so that the rotating ring 46 extends out of the groove 45 and blocks the inclined groove 151 under the push of the restoring force of the supporting spring 461. At this time, the rotating ring 46 pushes the outer annular wall of the elastic sheet 47 to rise, so that the elastic sheet 47 is deformed and becomes a trumpet shape with the opening upward. At this time, the phosphate transported to the top of the inner cylinder 15 by the spiral plate 2 and falling will fall on the upper end of the elastic sheet 47, so that the phosphate slides along the inclined surface of the elastic sheet 47 into the discharge port 44 of the blocking block 4, thereby ensuring that the dry phosphate can be collected, reducing the waste of phosphate, and further improving the practical application effect of the present invention.

[0025] Embodiment 2 is different from Embodiment 1 in that: The driving unit includes a driving wheel 3; the driving wheel 3 is located below the spiral frame 21; the driving wheel 3 is in rolling contact with the inner wall of the outer cylinder 16; the driving wheel 3 is connected to the roller 22 through a bevel gear set; the bevel gear set includes a bevel gear ring 31 and a bevel gear shaft 32 that are meshed with each other; the bevel gear shaft 32 is fixedly connected to the driving wheel 3; the bevel gear ring 31 is fixedly connected to the roller 22.

[0026] In this embodiment, a protrusion 33 is fixedly connected to the surface of the driving wheel 3; the protrusion 33 is made of silicone rubber material.

[0027] In this embodiment, the protrusions 33 on the surface of the driving wheel 3 are provided in five groups; each group of the protrusions 33 is distributed in a V-shape on the surface of the driving wheel 3; When working, although the ceramic motor 24 performs well in a high temperature environment, its overall cost is relatively high due to its high material and processing costs. To this end, the present invention sets a driving wheel 3. When the driving motor 184 drives the rotating plate 18 to drive the spiral plate 2 to rotate, the spiral frame 21 of the spiral plate 2 will drive the driving wheel 3 below to rotate synchronously, so that the driving wheel 3 can roll in contact with the inner wall of the outer cylinder 16, so that the rolling driving wheel 3 can drive the bevel gear shaft 32 connected thereto to rotate, so that the bevel gear shaft 32 drives the roller 22 to rotate through the bevel gear ring 31 meshing therewith, so that the driving wheel 3 can replace the ceramic motor 24 to drive the roller 22, thereby reducing the production cost of the present invention and improving the practicality of the present invention; and a protrusion 33 is fixedly connected to the surface of the driving wheel 3, so that the protrusion 33 can increase the roughness of the surface of the driving wheel 3, and the protrusion 33 is made of silicone rubber material, so that the driving wheel 3 pushes the silicone rubber material When the protrusion 33 of the material contacts the inner wall of the outer cylinder 16, the protrusion 33 will be squeezed and elastically deformed, so that the contact area between the deformed protrusion 33 and the inner wall of the outer cylinder 16 is increased, thereby increasing the friction between the driving wheel 3 and the outer cylinder 16, ensuring that the driving wheel 3 can effectively roll on the inner wall of the outer cylinder 16, thereby greatly improving the driving effect of the driving wheel 3 on the rotating roller 22; to this end, the present invention arranges a plurality of groups of protrusions 33 around the surface of the driving wheel 3, and each group of protrusions 33 is distributed in a V shape, so that the V-shaped protrusions 33 can not only have good guiding properties, so that the driving wheel 3 can maintain a stable direction when rolling on the inner wall of the outer cylinder 16, but also the V-shaped shape can directly increase the contact area between the protrusion 33 and the inner wall of the outer cylinder 16, thereby enhancing the stability and gripping force between the driving wheel 3 and the inner wall of the outer cylinder 16, thereby ensuring that the driving wheel 3 can stably roll on the inner wall of the outer cylinder 16, so as to improve the driving effect of the driving wheel 3 on the rotating roller 22.

[0028] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An improved phosphate drying tail gas recovery system, comprising: A spiral feeder (11), a drying cylinder (1), a hot air blower (12), a cyclone separator (13) and a suction fan (14); a feed pipe (171) and an air inlet pipe (172) which are in communication with the interior of the drying cylinder (1) are installed at the upper end of the drying cylinder (1); a discharge port (161) is provided at the lower end of the drying cylinder (1); the spiral feeder (11) is connected to the feed pipe (171) of the drying cylinder (1); the hot air blower (12) is connected to the air inlet pipe (172) of the drying cylinder (1); the cyclone separator (13) is connected to the lower end of the drying cylinder (1); the suction fan (14) is connected to the cyclone separator (13); the characteristics are: The drying cylinder (1) comprises an inner cylinder (15), an outer cylinder (16) and a cylinder cover (17); the inner cylinder (15) is located inside the outer cylinder (16); the inner cylinder (15) is fixedly connected to the bottom of the outer cylinder (16); the surface of the inner cylinder (15) is provided with an inclined groove (151) communicating with the outer cylinder (16); the cylinder cover (17) is fixedly installed on the upper end of the outer cylinder (16); the outer cylinder (16) is provided with a spiral cavity (162) communicating with the outside; the end of the spiral cavity (162) away from the outside penetrates the inner wall of the outer cylinder (16); a solenoid valve is fixedly installed in the spiral cavity (162); the spiral plate (2) is located between the inner cylinder (15) and the outer cylinder (16); the spiral plate (2) is in sliding sealing contact with the inner cylinder (15) and the outer cylinder (16); A rotating plate (18), wherein a through groove (173) is formed at the upper end of the cylinder cover (17); the rotating plate (18) is rotatably sealed and connected in the through groove (173); the lower end of the rotating plate (18) is fixedly connected to the spiral plate (2) via a connecting rod (181); a worm wheel (182) is fixedly connected to the upper end of the rotating plate (18); a worm (183) meshing with the worm wheel (182) is provided on one side of the worm wheel (182); the worm (183) is rotatably connected to the cylinder cover (17); a driving motor (184) is fixedly installed at the upper end of the cylinder cover (17); the driving motor (184) is used to drive the worm (183) to rotate; the feeding pipe (171) is rotatably sealed and connected to the rotating plate (18); a blocking unit is installed in the discharge port (161); the blocking unit is used to block the undried phosphate from entering the discharge port (161).

2. The improved phosphate drying tail gas recovery system according to claim 1, characterized in that: The spiral plate (2) comprises a spiral frame (21) and a roller (22); the roller (22) is rotatably connected to the spiral frame (21); a transmission belt (221) is sleeved on the surface of the roller (22); the transmission belt (221) is spiral; both ends of the roller (22) are provided with a cylindrical groove (222); a spur gear ring (223) is fixedly connected in the cylindrical groove (222); an elastic strip (224) is fixedly connected to a side of the transmission belt (221) close to the roller (22); the elastic strip (224) is made of PTFE material; the lower end of the elastic strip (224) is close to the tooth groove (225) meshing with the spur gear ring (223); a driving unit is installed inside the spiral frame (21); the driving unit is used to drive the roller (22) to rotate; a shovel plate (23) is fixedly installed at one end of the spiral frame (21) away from the cylinder cover (17).

3. The improved phosphate drying tail gas recovery system according to claim 2, characterized in that: The drive unit comprises a ceramic motor (24); a bevel gear shaft (241) and a bevel gear ring (242) are arranged inside the spiral frame (21); the bevel gear shaft (241) is fixedly connected to the output shaft of the ceramic motor (24); the bevel gear ring (242) is fixedly connected to one end of the rotating roller (22) close to the ceramic motor (24); the bevel gear shaft (241) is meshed with the bevel gear ring (242).

4. The improved phosphate drying tail gas recovery system according to claim 2, characterized in that: The driving unit comprises a driving wheel (3); the driving wheel (3) is located below the spiral frame (21); the driving wheel (3) is in rolling contact with the inner wall of the outer cylinder (16); the driving wheel (3) and the rotating roller (22) are connected to each other through a bevel gear set; the bevel gear set comprises a bevel gear ring (31) and a bevel gear shaft (32) meshing with each other; the bevel gear shaft (32) is fixedly connected to the driving wheel (3); and the bevel gear ring (31) is fixedly connected to the rotating roller (22).

5. The improved phosphate drying tail gas recovery system according to claim 4, characterized in that: A protrusion (33) is fixedly connected to the surface of the driving wheel (3); the protrusion (33) is made of silicone rubber material.

6. The improved phosphate drying tail gas recovery system according to claim 5, characterized in that: The protrusions (33) on the surface of the driving wheel (3) are arranged in five groups; each group of protrusions (33) is distributed in a V-shape on the surface of the driving wheel (3).

7. An improved phosphate drying tail gas recovery system according to claim 3 or 4, characterized in that: The inner wall of the through groove (173) is provided with an annular groove (185) which is in communication with the air inlet pipe (172); the upper end surface of the spiral frame (21) is provided with an air injection groove (25); an air passage (186) is provided inside the connecting rod (181); one end of the air passage (186) passes through the rotating plate (18) and is in communication with the annular groove (185), and the other end passes through the spiral frame (21) and is in communication with the air injection groove (25).

8. The improved phosphate drying tail gas recovery system according to claim 7, characterized in that: The blocking unit comprises a blocking block (4); the bottom of the inner cylinder (15) is arranged in a frustum shape; the bottom of the inner cylinder (15) is provided with a mounting groove (41) connected to a discharge port (161); the blocking block (4) is slidably connected in the mounting groove (41); the blocking block (4) is fixedly connected to the bottom of the mounting groove (41) by a connecting spring (42); the bottom of the mounting groove (41) is inlaid with an electromagnetic ring (43); the outer wall of the blocking block (4) is provided with a discharge port (44) connected to the discharge port (161); the upper end surface of the blocking block (4) is arranged in a cone shape.

9. The improved phosphate drying tail gas recovery system according to claim 8, characterized in that: The bottom of the inner cylinder (15) is provided with a groove (45); a rotating ring (46) is slidably sealed in the groove (45); the rotating ring (46) is fixedly connected to the bottom of the groove (45) via a supporting spring (461); an electromagnetic sheet (462) is embedded in the bottom of the groove (45); an annular elastic sheet (47) is provided at the bottom of the inner cylinder (15); the outer ring wall of the elastic sheet (47) is fixedly connected to the rotating ring (46); and the inner ring wall of the elastic sheet (47) is fixedly connected to the bottom of the inner cylinder (15).

Images