An improved phosphate drying tail gas recovery system

Abstract

The present invention relates to the technical field of phosphate drying, and in particular to an improved phosphate drying tail gas recovery system; the system comprises a spiral feeder, a drying drum, a hot air blower, a cyclone separator and a suction fan; 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, 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 phosphate in the inner drum from bottom to top, so that the phosphate can be close to an 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, not only improving the drying efficiency of the phosphate, but also preventing the phosphate close to the air inlet pipe from being overheated or burned, thereby ensuring the drying quality of the phosphate.

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 a critical step in the production of food phosphates. Phosphates absorb moisture or deteriorate in a humid environment, resulting in unstable product quality. Drying phosphates removes moisture from the product, reducing the risk of moisture absorption and making the final product more stable and easier to store.

[0003] 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, 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;

[0004] This solution uses a horizontal drying drum to dry the phosphate. However, to ensure that the phosphate has sufficient contact time with the hot air during drying, thereby effectively evaporating the moisture in the phosphate, the drying drum needs to be longer. This longer drum can prolong the residence time of the phosphate inside the drum, ensuring sufficient drying effect. However, the longer drying drum requires more floor space, which not only increases site costs but also complicates the layout of the production line, affecting the installation and operation of other equipment.

[0005] In addition, as the hot air flows through the drying drum, it drives the moisture volatilized by the phosphate to flow synchronously, resulting in low humidity in the hot air just entering the drying drum, while high humidity in the hot air flowing out of the drying drum. 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 decreases. This results in uneven drying of the phosphate in the drying drum, and for this, the drying time needs to be extended so that the phosphate near the air outlet can be fully dried. This not only reduces the drying efficiency of the phosphate, but also causes the phosphate near the air inlet pipe of the drying drum to overheat or burn, thereby affecting the drying quality of the phosphate.

[0006] 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

[0007] In order to make up for the shortcomings of the existing technology, the present invention proposes an improved phosphate drying exhaust gas recovery system. The present invention reduces the floor space of the drying cylinder by setting the drying cylinder to be vertical, which not only reduces site costs but also optimizes the production line layout. The equipment is relatively compact, which is convenient for operators to install and operate; thereby improving production efficiency. The setting 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.

[0008] The technical solution adopted by the present invention to solve the technical problem is: an improved phosphate drying tail gas recovery system of the present invention comprises:

[0009] A spiral feeder, a drying drum, a hot air blower, a cyclone separator and a suction fan; a feed pipe and an air inlet pipe connected to the interior of the drying drum are installed at the upper end of the drying drum; a discharge port is opened at the lower end of the drying drum; the spiral feeder is connected to the feed pipe of the drying drum; the hot air blower is connected to the air inlet pipe of the drying drum; the cyclone separator is connected to the lower end of the drying drum; and the suction fan is connected to the cyclone separator;

[0010] The spiral plate 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 inner cylinder surface is provided with an inclined groove communicating with the outer cylinder; the cylinder cover is fixedly mounted on the upper end of the outer cylinder; the outer cylinder is provided with a spiral cavity communicating with the outside world; the end of the spiral cavity away from the outside world passes through the inner wall of the outer cylinder; a solenoid valve is fixedly mounted in the spiral cavity; the spiral plate is located between the inner cylinder and the outer cylinder; the spiral plate is in sliding and sealing contact with the inner cylinder and the outer cylinder;

[0011] The rotating plate is provided with a through groove at 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; the upper end of the rotating plate is fixedly connected with a worm wheel; a worm is provided on one side of the worm wheel to engage with it; 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 undried phosphate from entering the discharge port.

[0012] 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 the 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 engaged 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.

[0013] Preferably, the drive unit includes a ceramic motor; a bevel gear shaft and a bevel gear ring are provided 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 roller close to the ceramic motor; the bevel gear shaft is meshed with the bevel gear ring.

[0014] 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 are meshed 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.

[0015] Preferably, a protrusion is fixedly connected to the surface of the driving wheel; the protrusion is made of silicone rubber material.

[0016] Preferably, the protrusions on the surface of the driving wheel are provided in five groups; the protrusions in each group are distributed in a V-shape on the surface of the driving wheel.

[0017] Preferably, an annular groove connected to the air inlet pipe is provided on the inner wall of the through groove; an air jet groove is provided on the upper end surface of the spiral frame; an air duct is provided inside the connecting rod; one end of the air duct 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.

[0018] Preferably, the blocking unit includes a blocking block; the bottom of the inner cylinder is configured to be frustum-shaped; 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 embedded in 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 face of the blocking block is configured to be conical.

[0019] 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 support 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.

[0020] The beneficial effects of the present invention are as follows:

[0021] 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; thereby improving production efficiency. 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, 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.

[0022] 2. The present invention provides an air jet slot so that the hot air ejected from the air jet slot 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, improving the drying effect of the phosphate, further increasing the drying speed of the phosphate, and improving the practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic structural diagram of the improved phosphate drying tail gas recovery system of the present invention;

[0025] Figure 2 Schematic diagram of the structure of the drying drum used in the present invention;

[0026] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0028] Figure 5 yes Figure 2 Enlarged view of point C in the middle;

[0029] Figure 6 It is a structural schematic diagram of a drying drum equipped with a driving wheel in the present invention;

[0030] Figure 7 yes Figure 6 Enlarged view of point D in the middle;

[0031] Figure 8 is a perspective view of a spiral plate used in the present invention;

[0032] Figure 9 is a perspective view of a drive wheel used in the present invention;

[0033] Figure: 1, drying drum; 11, spiral feeder; 12, hot air blower; 13, cyclone separator; 14, suction fan; 15, inner drum; 151, chute; 16, outer drum; 161, discharge port; 162, spiral chamber; 17, drum 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, air duct; 2, spiral plate; 21, spiral rack; 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

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0035] like Figures 1 to 9 As shown, the improved phosphate drying tail gas recovery system of the present invention includes the following embodiments:

[0036] Example 1:

[0037] An improved phosphate drying tail gas recovery system, comprising:

[0038] A spiral feeder 11, a drying drum 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 communicating with the interior of the drying drum 1 are installed at the upper end of the drying drum 1; a discharge port 161 is provided at the lower end of the drying drum 1; the spiral feeder 11 is connected to the feed pipe 171 of the drying drum 1; the hot air blower 12 is connected to the air inlet pipe 172 of the drying drum 1; the cyclone separator 13 is connected to the lower end of the drying drum 1; and the suction fan 14 is connected to the cyclone separator 13;

[0039] Spiral plate 2, the drying drum 1 includes an inner drum 15, an outer drum 16 and a drum cover 17; the inner drum 15 is located inside the outer drum 16; the inner drum 15 is fixedly connected to the bottom of the outer drum 16; the surface of the inner drum 15 is provided with an inclined groove 151 communicating with the outer drum 16; the drum cover 17 is fixedly mounted on the upper end of the outer drum 16; the outer drum 16 is provided with a spiral cavity 162 communicating with the outside world; the end of the spiral cavity 162 away from the outside world passes through the inner wall of the outer drum 16; a solenoid valve is fixedly mounted in the spiral cavity 162; the spiral plate 2 is located between the inner drum 15 and the outer drum 16; the spiral plate 2 is in sliding and sealing contact with the inner drum 15 and the outer drum 16;

[0040] 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; the upper end of the rotating plate 18 is fixedly connected to a worm gear 182; one side of the worm gear 182 is provided with a worm 183 engaged with it; the worm 183 is rotatably connected to the cylinder cover 17; a drive motor 184 is fixedly installed on the upper end of the cylinder cover 17; the drive motor 184 is used to drive the worm 183 to rotate; the feed 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 prevent undried phosphate from entering the discharge port 161.

[0041] 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-shaped; 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 engaged 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 on the end of the spiral frame 21 away from the cylinder cover 17.

[0042] In this embodiment, the drive unit includes a ceramic motor 24; a bevel gear shaft 241 and a bevel gear ring 242 are provided 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 roller 22 close to the ceramic motor 24; the bevel gear shaft 241 is meshed with the bevel gear ring 242.

[0043] In this embodiment, an annular groove 185 is formed on the inner wall of the through groove 173 and is connected to the air inlet pipe 172; 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.

[0044] 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 fixed 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.

[0045] In this embodiment, a groove 45 is formed at the bottom of the inner cylinder 15; a rotating ring 46 is slidably and sealably connected to the groove 45; the rotating ring 46 is fixedly connected to the bottom of the groove 45 via a support spring 461; an electromagnetic plate 462 is embedded in the bottom of the groove 45; an annular elastic plate 47 is provided at the bottom of the inner cylinder 15; the outer ring wall of the elastic plate 47 is fixedly connected to the rotating ring 46; and the inner ring wall of the elastic plate 47 is fixedly connected to the bottom of the inner cylinder 15.

[0046] During operation, the existing drying drum 1 dries the phosphate. However, when drying the phosphate, the horizontal drying drum 1 needs to be longer to ensure that the phosphate has sufficient contact time with the hot air to effectively evaporate the moisture in the phosphate. The longer drum can prolong the residence time of the phosphate in the drum, ensuring sufficient drying effect for the phosphate. However, the longer drying drum 1 requires more floor space, which not only increases site costs, but also complicates the layout of the production line and affects the installation and operation of other equipment.

[0047] In addition, as the hot air flows in the drying drum 1, the hot air will drive the moisture volatilized by the phosphate to flow synchronously, resulting in low humidity of the hot air just entering the drying drum 1, while high humidity of the hot air flowing out of the drying drum 1. 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 purpose, 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;

[0048] In this regard, the present invention reduces the floor space occupied by the drying drum 1 by setting the drying drum 1 to be vertical, which not only reduces site costs but also optimizes the layout of the production line. The equipment is relatively compact, making it easier for operators to install and operate the equipment. This improves production efficiency. The arrangement 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 preventing the phosphate close to the air inlet pipe 172 from overheating or burning, thereby ensuring the drying quality of the phosphate.

[0049] 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 inside of the installation groove 41, so that the tapered end of the blocking block 4 and the bottom of the inner cylinder 15 are on the same tapered surface. At this time, the electromagnetic valve in the spiral chamber 162 is in the open state, the feed pipe 171 is rotatably sealed and connected with the rotating plate 18, and 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 tapered surface will slide down along the tapered 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 151 is provided, the phosphate falls to the bottom of the inner cylinder 15. The groove 151 is located close to the lower end surface of the inner cylinder 15, so that the phosphate that slides to the wall of the inner cylinder 15 will slide into the space between the outer cylinder 16 and the inner cylinder 15 through the inclined groove 151. At this time, the drive motor 184 is controlled to operate so that the drive motor 184 can drive the worm gear 182 to rotate through the worm 183 fixedly connected to its output shaft, so that the worm gear 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 2 is controlled 4 operates, so that 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 engaged therewith, so that the roller 22 can drive the transmission belt 221 to circle 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. 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 circle around the spiral frame 21 through the elastic strip 224 engaged therewith; thereby improving the transmission efficiency and transmission stability between the roller 22 and the transmission belt 221, and avoiding the transmission belt The problem of slipping or sliding of roller 221 on the surface of 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 high-temperature environments. To maintain their quality and safety, they need to be dried at a low temperature of 50-50°C. Industrial-grade phosphates are generally 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. The ceramic motor 24 is provided with excellent high-temperature resistance. Therefore, when industrial-grade phosphates need to be dried, the ceramic motor 24 can still operate normally and stably in the drying drum 1.This not only ensures the normal and stable operation of the present invention, but also enables the present invention to perform medium-temperature or high-temperature drying on industrial-grade phosphate, thereby expanding the scope of application of the present invention and further enhancing the practicality of the present invention. Furthermore, the PTFE material has good high-temperature resistance, enabling the elastic strip 224 to be used normally and stably in a high-temperature drying environment of 200-300°C.

[0050] 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 top 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 and falls into the inner cylinder 15; in the process of the transmission belt 221 transporting the phosphate upward, the hot air blower 12 runs and delivers 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 to the annular groove 185 through the air channel 186, the hot air flow entering the annular groove 185 will enter the air jet groove 25 through the air channel 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 phosphate corrosion, 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 transferred to the phosphate transported at the upper end of the transmission belt 221, so that During the process of transporting phosphate, the transmission belt 221 enables the phosphate to be continuously in contact with the dry hot air flow, thereby accelerating the drying efficiency of the phosphate; and the hot air ejected from the air 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 transfer of heat, enhancing the heat exchange efficiency, making the moisture in the phosphate evaporate more quickly, improving the drying effect of the phosphate, further increasing the drying speed of the phosphate, and improving the practicality of the present invention; since the solenoid valve in the spiral chamber 162 is in the open state, During the upward movement of the hot air flow ejected from the jet slot 25, the hot air flow will carry the moisture of the phosphate recovery force and rise to the upper port of the spiral chamber 162 connected to the outer cylinder 16, 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 heat the outer cylinder 16, so that the external cold air passes through the outer wall of the outer cylinder 16 and exchanges heat with the hot air flow in the spiral chamber 162, 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; thus, the practicality of the present invention is further improved;

[0051] When the phosphate is dried, the solenoid valve is controlled to close. At this time, the electromagnetic ring 43 is controlled to be de-energized, so that the blocking block 4 extends out of the mounting groove 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 groove 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 dried 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 sets an elastic sheet 47, and the inner of the elastic sheet 47 is The ring wall is directly opposite to the notch of the mounting groove 41. In the initial state, the electromagnetic sheet 462 attracts 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 de-energized, so that the electromagnetic sheet 462 no longer attracts the rotating ring 46, so that the rotating ring 46 extends out of the groove 45 under the push of the restoring force of the support spring 461 and blocks the inclined groove 151. At this time, the rotating ring 46 pushes the outer ring 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.

[0052] The difference between Example 2 and Example 1 is that:

[0053] The drive unit includes a drive wheel 3; the drive wheel 3 is located below the spiral frame 21; the drive wheel 3 is in rolling contact with the inner wall of the outer cylinder 16; the drive 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 drive wheel 3; the bevel gear ring 31 is fixedly connected to the roller 22.

[0054] 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.

[0055] In this embodiment, the protrusions 33 on the surface of the driving wheel 3 are provided in five groups; each group of protrusions 33 is distributed in a V-shape on the surface of the driving wheel 3;

[0056] 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 fixed thereto to rotate, so that the bevel gear shaft 32 drives the roller 22 to rotate through the bevel gear ring 31 engaged 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 protrusions 33 of the material come into contact with the inner wall of the outer cylinder 16, the protrusions 33 will be squeezed and elastically deformed, so that the contact area between the deformed protrusions 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 multiple 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 protrusions 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.

[0057] 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.

[0058] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended 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) communicating with the interior 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); the characteristics are: The spiral plate (2) is provided, and 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 world; the end of the spiral cavity (162) away from the outside world passes through 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 and sealing contact with the inner cylinder (15) and the outer cylinder (16); The rotating plate (18) is provided with a through groove (173) 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); the upper end of the rotating plate (18) is fixedly connected with a worm wheel (182); a worm (183) meshing with the worm wheel (182) is provided on one side; the worm wheel (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 wheel (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); 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; the transmission belt (221) is a braided belt made of PTFE material, and the braided belt has a good pore structure; cylindrical grooves (222) are provided 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 one 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 on one end of the spiral frame (21) away from the cylinder cover (17); The driving unit comprises a ceramic motor (24); a bevel gear shaft (241) and a bevel gear ring (242) are provided 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); An annular groove (185) communicating with the air inlet pipe (172) is provided on the inner wall of the through groove (173); an air jet groove (25) is provided on the upper end surface of the spiral frame (21); 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 communicated with the annular groove (185), and the other end passes through the spiral frame (21) and is communicated with the air jet groove (25).

2. The improved phosphate drying tail gas recovery system according to claim 1, characterized in that: Another embodiment of the drive unit comprises a drive wheel (3); the drive wheel (3) is located below the spiral frame (21); the drive wheel (3) is in rolling contact with the inner wall of the outer cylinder (16); the drive wheel (3) and the 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) that mesh with each other; the bevel gear shaft (32) is fixedly connected to the drive wheel (3); and the bevel gear ring (31) is fixedly connected to the roller (22).

3. The improved phosphate drying tail gas recovery system according to claim 2, 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.

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

5. The improved phosphate drying tail gas recovery system according to claim 4, 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) via 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 conical shape.

6. The improved phosphate drying tail gas recovery system according to claim 5, characterized in that: The bottom of the inner cylinder (15) is provided with a groove (45); a rotating ring (46) is connected in a sliding and sealing manner in the groove (45); the rotating ring (46) is fixedly connected to the bottom of the groove (45) via a supporting spring (461); the bottom of the groove (45) is inlaid with an electromagnetic sheet (462); 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), and the rotating ring (46) pushes the outer ring wall of the elastic sheet (47) to rise, so that the elastic sheet (47) is deformed and takes on a trumpet shape with the opening upward.

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