Environment-friendly rotary drum drying equipment with cooling function

Abstract

The environment-friendly rotary drum drying equipment with the cooling function comprises a base and a drying drum body, and a feeding end socket and a discharging end socket are arranged at the two ends of the drying drum body correspondingly. The feeding end socket is movably inserted into the joint of the drying barrel, the air sealing devices are arranged at the joint of the drying barrel movably inserted into the discharging end socket, a feeding pipeline and an air extracting pump are fixedly arranged on the feeding end socket, and a cold air inlet, a hot air inlet and a discharging opening are formed in the discharging end socket. And gas in the drying barrel is transferred to the joint of the sealing head and the drying barrel through the air pump via the cyclone separation device and the water curtain dust removal equipment, so that the drying barrel is sealed. According to the rotary drum drying equipment, sealing of the drying barrel is achieved through gas, on one hand, recycling of inlet air in the drying barrel is achieved, on the other hand, the structure of the whole rotary drum drying equipment is effectively simplified, the input cost of the equipment and the loss maintenance cost are reduced, and the drying cost of materials is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of dryers, and in particular to an environmentally friendly rotary drum drying device with a cooling function. Background Art

[0002] The drum dryer is mainly composed of a rotating body, a lifting plate, a transmission device, a supporting device and a sealing ring. The dryer is a cylinder slightly inclined to the horizontal direction. The material is added from the higher end, and the high-temperature hot flue gas and the material flow into the cylinder. As the cylinder rotates, the material moves to the lower end due to gravity. A lifting plate is installed on the inner wall of the cylinder to lift the material and sprinkle it down, so that the contact surface between the material and the airflow is increased to increase the drying rate and promote the forward movement of the material. The dried product is collected from the lower part of the bottom. It is a continuous drying production machinery.

[0003] The drum drying equipment currently used in the market only has a drying function, and due to the high temperature of the material just dried, the packaged material will have a serious agglomeration phenomenon after long-term storage. Patent No. CN216159574U, named a drum dryer with cooling function, discloses that a hot air blower sends air into the drying cylinder for drying, and uses a cold fan to cool the material at the discharge port. Although the material at the discharge port can be quickly cooled, the hot air blown by the hot air blower and the cold air blown by the cold fan are directly discharged from the drum drying equipment, resulting in a waste of resources. At the same time, it is disclosed that the drying cylinder of the drum dryer is rotatably connected to the feed cylinder and the discharge cylinder at both ends of the drum dryer. This connection generally uses a pipeline connection device-a swivel joint, a 360° rotating medium-transmitting closed swivel connector, which can be used to transmit gas, liquid, oil and other media, but the service life of the swivel joint is greatly affected by the use environment, quality and installation and maintenance. In industrial production, this connection method has a large loss in use, and subsequent disassembly and maintenance will be a large part of the expenditure, greatly increasing the cost of material drying. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide an environmentally friendly rotary drum drying device with a cooling function.

[0005] According to the technical solution provided in the embodiment of the present application, an environmentally friendly rotary drum drying device with a cooling function includes a base and a drying drum, and the drying drum rolls relative to the base through a motor.

[0006] A feed seal and a discharge seal are respectively provided at the two ends of the drying cylinder. An air seal device A is provided at the connection where the feed seal is movably inserted into the drying cylinder, and an air seal device B is provided at the connection where the drying cylinder is movably inserted into the discharge seal. A feed pipe and an air pump are fixedly provided on the feed seal, and a cold air inlet, a hot air inlet and a discharge port are provided on the discharge seal. The discharge port is located at the lower end of the discharge seal, the cold air inlet is communicated with the inside of the drying cylinder, and the hot air inlet is communicated with the hot air duct in the drying cylinder, and the hot air duct is fixed in the drying cylinder through a support rod.

[0007] The hot air that dries the material enters the drying cylinder through the hot air inlet through the hot air pipe, and is mixed with the cold air that enters the drying cylinder through the cold air inlet in the middle part of the drying cylinder. It is then extracted by an exhaust pump, dusted by a cyclone separation device and a water curtain dust removal device, and then transferred to the air sealing device, forming an air pressure difference with the inside of the drying cylinder to achieve sealing of the drying cylinder.

[0008] Furthermore, the inclination angle between the drying cylinder and the ground is 1.5°-2.5°, which facilitates the movement of materials toward the discharge end when the drying cylinder rolls, and can ensure the residence time of the materials in the drying cylinder.

[0009] Furthermore, the hot air pipe is a slotted sleeve to prevent the material from falling onto the hot air pipe and causing the material to melt during the drying process; a conical wind cap is provided at the air outlet of the hot air pipe to ensure that the hot air can be evenly distributed in the drying cylinder.

[0010] Furthermore, the air sealing device A includes an air inlet device and a wind shield device. The air inlet device includes an annular ring. The air inlet device is fixed to the feed head through the annular ring. An annular groove is provided on the end of the annular ring away from the feed head. The annular groove is communicated with a plurality of air inlets arranged on the outer side wall of the annular groove. The annular wind shield device is fixed on the inner wall of the left end of the drying cylinder. The wind shield device includes an annular wind shield plate and an annular rubber ring fixed to the wind shield plate by bolts. The spacing between the wind shield device and the air inlet device is 2mm-4mm, which can effectively prevent the material in the cylinder from flying out.

[0011] Furthermore, the air sealing device B includes an air inlet pipe, an air shield ring A and an air shield ring B. The air shield ring A and the air shield ring B are both fixed on the inner wall of the discharge head. Several air inlet pipes are evenly inserted into the discharge head on the same plane. The air inlet pipe is located between the air shield ring A and the air shield ring B. This arrangement enables the material in the drying cylinder to directly fall into the discharge port of the discharge head, greatly reducing the probability of the material flying out from the connection between the discharge head and the drying cylinder.

[0012] Furthermore, a manhole is provided on the discharge head to facilitate operators to clean the drying cylinder.

[0013] Furthermore, a plurality of middle partitions are arranged on the inner end surface of the drying cylinder, and a plurality of flow regulating holes are evenly arranged on the middle partitions to adjust the residence time of the material in the drying cylinder.

[0014] Furthermore, the middle partition includes a retaining ring, an adjusting plate and an adjusting bolt. A long hole is provided in the radial direction of the retaining ring. The adjusting plate is fixed to the retaining ring by the adjusting bolt passing through the long hole. The hole between the inner wall of the drying cylinder and the end face of the adjusting plate adjacent to the inner wall of the drying cylinder is the flow regulating hole. The fixing of the adjusting bolt at different positions on the long hole drives the change of the distance between the adjusting plate and the inner wall of the drying cylinder, thereby realizing the adjustment of the hole size of the flow regulating hole.

[0015] Furthermore, a plurality of lifting plates for lifting the materials are arranged on the inner wall of the drying cylinder, and the angle between the outer side of the lifting plates and the inner wall of the drying cylinder is 2°-5°, so that the materials can be scattered more evenly and dried more thoroughly.

[0016] In summary, the beneficial effects of this application are as follows:

[0017] 1. After the materials are dried in the drying cylinder from the hot air inlet and the cold air inlet, the gas extracted by the exhaust fan and dedusted by the water curtain dust removal device is recycled to the rotary drying equipment through the gas sealing device, forming a pressure difference with the air pressure inside the drying cylinder, realizing the sealing between the drying cylinder and the feed head and the discharge head. On the one hand, the recycling of the air in the drying cylinder is realized, and on the other hand, the structure of the entire rotary drying equipment is effectively simplified, reducing the investment in connectors, reducing the investment cost of the equipment, and reducing the maintenance cost of the later equipment loss, which greatly reduces the drying cost of the materials;

[0018] 2. Installing a baffle on the air sealing device can effectively prevent the material from flying out, and further reduce the impact of external gas on the inside of the drying cylinder;

[0019] 3. The flow regulating holes arranged on the inner wall of the drying cylinder can flexibly adjust the residence time of the material in the drum according to the moisture content of the material through the hole size of the flow regulating holes, thereby ensuring qualified discharge, improving the stability of the material and increasing economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 This is a front view structural diagram of the overall device of this application;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the drying cylinder of this application;

[0023] Figure 3 This is a schematic diagram of the structure of the hot air duct of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the connection between the partition and part of the drying cylinder in this application;

[0025] Figure 5 This is a schematic diagram of the structure of the gas sealing device A and the feed pipeline of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the air inlet device of this application;

[0027] Figure 7 This is a schematic diagram of the connection structure between the gas sealing device B and the discharge head of this application.

[0028] Numbers in the figure: base-1; drying cylinder-2; motor-3; feed head-4; feed pipe-41; vacuum pump-42; discharge head-5; cold air inlet-51; hot air inlet-52; discharge port-53; manhole-54; hot air pipe-6; conical hood-61; support rod-7; cyclone separation device-8; water curtain dust removal device-9; middle partition-10; retaining ring-101; long hole-10 11; adjusting plate-102; adjusting bolt-103; air sealing device A-11; air inlet device-111; annular collar-1111; annular groove-1112; air inlet-1113; wind shield device-112; wind shield plate-1121; annular rubber ring-1122; flow regulating hole-12; air sealing device B-13; air inlet pipe-131; wind shield ring A-132; wind shield ring B-133. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] An environmentally friendly rotary drum drying device with cooling function, such as Figure 1 As shown, it includes a base 1 and a drying cylinder 2. A motor 3 is provided on the base 1. The motor 3 drives the gear on the outer end surface of the drying cylinder 2 to realize the rolling of the drying cylinder 2 relative to the base 1. The angle between the drying cylinder 2 and the horizontal ground is 1.5°-2.5°.

[0032] like Figure 1 and Figure 2 As shown, a feed seal 4 and a discharge seal 5 are respectively provided on the left and right end surfaces of the drying cylinder 2, and the feed seal 4 is higher than the discharge seal 5;

[0033] The feed seal 4 is movably inserted into the drying cylinder 2, and the right end of the drying cylinder 2 is movably inserted into the discharge seal 5. A gas seal device A11 is fixed on the end of the feed seal 4 near the drying cylinder 2. The gas seal device A11 is as shown in FIG. Figure 5 As shown,

[0034] The air sealing device A11 includes an air inlet device 111 and a wind shield device 112. The air inlet device 111 includes an annular collar 1111. The air inlet device 111 is fixed to the feed head 4 through the annular collar 1111. An annular groove 1112 is provided at one end of the annular collar 1111 away from the feed head 4. The annular groove 1112 is communicated with a plurality of air inlets 1113 provided on the outer side wall of the annular groove 1112. The right end of the annular groove 1112 is movably inserted into the drying cylinder 2, that is, the inner diameter of the annular groove 1112 is smaller than the inner diameter of the drying cylinder 2. Figure 6 As shown, a gap is left between the outer wall of the annular groove 1112 and the wind shield 1121, that is, the length of the inner circle of the annular groove 1112 is greater than the length of the outer circle of the annular groove 1112;

[0035] The annular windshield 112 is fixed on the inner wall of the left end of the drying cylinder 2. The windshield 112 includes an annular windshield 1121 and an annular rubber ring 1122 fixed to the windshield 1121 by bolts. The distance between the windshield 112 and the air inlet 111 is 2mm-4mm, so that when the drying cylinder 2 rotates with the windshield 112, it will not contact the air inlet 111, and can effectively prevent the material in the drying cylinder 2 from flying out and causing product loss.

[0036] The air inlet 1113 is connected to the air outlet of the water curtain dust removal device 9 through a pipeline, and a pressure valve is provided on the connecting pipeline to detect the pressure of the gas entering the annular groove 1112 from the air inlet 1113;

[0037] While achieving the air sealing of the drying cylinder 2, the air sealing device A11 can also fix a rubber retaining ring on the outer wall of the annular groove 1112. The rubber retaining ring can block the gap between the outer wall of the annular groove 1112 and the outer wall of the drying cylinder 2, thereby preventing the material in the drying cylinder 2 from flying into the external air through the annular groove 1112 and causing product loss. This is mainly achieved by utilizing the multi-bend principle of the bow shape.

[0038] Similarly, the air inlet pipe 131 on the air sealing device B13 provided on the discharge sealing head 5 is connected to the air outlet of the water curtain dust removal device 9 through a pipeline, and a pressure valve is provided on the connecting pipeline to detect the gas pressure entering the discharge sealing head 5 from the air inlet pipe 131;

[0039] like Figure 7 As shown, the air sealing device B13 includes an air inlet pipe 131, an air shield ring A132 and an air shield ring B133. The air shield ring A132 and the air shield ring B133 are fixed on the inner wall of the discharge head 5. A plurality of air inlet pipes 131 are evenly inserted into the discharge head 5 on the same plane. The air inlet pipe 131 is located between the air shield ring A132 and the air shield ring B133. Since the right end of the drying cylinder 2 is movably inserted into the discharge head 5, the inner diameters of the air shield ring A132 and the air shield ring B133 are both larger than the outer diameter of the drying cylinder 2, and the inner diameter of the air shield ring A132 is larger than the inner diameter of the air shield ring B133.

[0040] A rubber ring is fixed on one side of the wind shield ring A132 and the wind shield ring B133 by bolts. The inner diameter of the rubber ring is smaller than the inner diameter of the wind shield ring A132 and the wind shield ring B133, and larger than the outer diameter of the drying cylinder 2, so that the distance between the inner side of the rubber ring on the wind shield ring A132 and the wind shield ring B133 and the outer wall of the drying cylinder 2 is 2-4mm, which can prevent the material in the drying cylinder 2 from flying out on the one hand, and further avoid the influence of the outside air on the drying cylinder 2 on the other hand;

[0041] like Figure 1 and Figure 2 As shown, a feed pipe 41 and an air pump 42 are fixedly provided on the feed seal 4, both of which are directly connected to the drying cylinder 2. The air pump 42 is located on the upper end surface of the feed seal 4, and the feed pipe 41 is located in the middle part of the drying cylinder 2. The feed pipe 41 can be a downwardly inclined pipe to facilitate the material to fall into the drying cylinder 2 due to gravity. A material collecting baffle is provided at the air inlet of the air pump 42. The material collecting baffle is a conical cylinder that is wide at the bottom and narrow at the top, and a plurality of spiral upward collecting plates are provided on the inner wall of the conical cylinder to prevent the powdered material in the drying cylinder 2 from entering the air pump 42 and blocking the air pipe of the air pump 42.

[0042] like Figure 1 , Figure 2 and Figure 7 As shown, the discharge sealing head 5 is provided with a cold air inlet 51, a hot air inlet 52, a discharge port 53, and a manhole 54. The discharge port 53 is located at the lower end of the discharge sealing head 5, so that the material dried in the drying cylinder 2 can enter the discharge port 53 and be discharged by gravity. The hot air inlet 52 is concentric with the drying cylinder 2, and the cold air inlet 51 is located above the hot air inlet 52.

[0043] A hot air pipe 6 is fixedly arranged in the drying cylinder 2 through a support rod 7. One end of the hot air pipe 6 is connected to the hot air inlet 52, and the other end is suspended in the middle of the drying cylinder 2. The distance between the outlet of the hot air pipe 6 and the discharge head 5 is one-third to one-half of the drying cylinder 2. Figure 2 and Figure 3 As shown, the hot air pipe 6 is a slotted sleeve, and a conical air cap 61 is fixedly provided at the air outlet of the hot air pipe 6 to facilitate uniform distribution of hot air in the drying cylinder 2;

[0044] The vacuum pump 42 on the feed seal 4 extracts the gas at the feed end of the drying cylinder 2 to the cyclone separation device 8 and the water curtain dust removal device 9, and removes impurities from the gas again. The impurity-removed gas enters the air inlet 1113 of the air sealing device A11 through the connecting pipe, and enters the annular groove 1112 from the air inlet 1113. At this time, the air pressure of the intake air is about 1 bar; at the same time, the impurity-removed gas enters the air inlet pipe 131 of the air sealing device B13 through the pipeline, and enters between the wind shield ring A132 and the wind shield ring B133 arranged on the inner wall of the discharge seal 5 from the air inlet pipe 131. At this time, the pressure of the intake air is about 1 bar; and since the entire device formed by the drying cylinder 2, the feed seal 4 and the discharge seal 5 maintains a negative pressure of 200 mbar after being evacuated by the vacuum pump 42, a large pressure difference is formed between the intake air and the pressure inside the drying cylinder 2, which is sufficient to prevent the gas outside the drying cylinder 2 from entering the drying cylinder 2, thereby achieving the sealing of the drying cylinder 2;

[0045] like Figure 2 and Figure 4 As shown, a plurality of middle partitions 10 are fixedly provided on the inner wall of the middle part of the drying cylinder 2, and a plurality of flow regulating holes 12 are evenly provided on the middle partition 10. The retaining ring 101 on the middle partition 10 is annular and fixed on the inner wall of the drying cylinder 2. A long hole 1011 is provided in the radial direction of the retaining ring 101. An adjusting plate 102 is fixed between the two long holes 1011 through an adjusting bolt 103. The adjusting plate 102 is fixed to the retaining ring 101 through the adjusting bolt 103. On one end face, the adjusting bolt 103 fixes the adjusting plate 102 tightly on the retaining ring 101 through a nut. The hole between the inner wall of the drying cylinder 2 and the end face of the adjusting plate 102 adjacent to the inner wall of the drying cylinder 2 is the flow regulating hole 12. When the adjusting bolt 103 moves on the long hole 1011, it will drive the adjusting plate 102 to move on the retaining ring 101, driving the change of the distance between the adjusting plate 102 and the inner wall of the drying cylinder 2, thereby realizing the adjustment of the hole size of the flow regulating hole 12;

[0046] A plurality of lifting plates for lifting materials are arranged on the inner wall of the drying cylinder 2. The angle between the outer side of the lifting plate and the inner wall of the drying cylinder 2 is 2°-5°. One end of the lifting plate is suspended in the air and is tooth-shaped to prevent the materials from agglomerating.

[0047] A flow regulating valve is provided at the cold air inlet 51, which can adjust the size of the incoming air according to the situation.

[0048] A long strip of outer eight-shaped flow guide structure can also be provided at the cold air inlet 51 located in the discharge head 5 to facilitate the air flow to be dispersed to the inner cylinder wall of the right half of the drying cylinder 2, so as to facilitate the cooling of the material.

[0049] Working principle: Start the motor 3, so that the motor 3 drives the drying cylinder 2 to rotate. During the rotation of the drying cylinder 2, hot air is introduced from the hot air inlet 52, and cold air is introduced from the cold air inlet 51. The hot air enters the hot air pipe 6, is discharged through the air outlet of the hot air pipe 6, and enters the middle part of the drying cylinder 2. The cold air enters the space between the drying cylinder 2 and the hot air pipe 6.

[0050] At the same time, the material enters from the feed pipe 41, so that the feeding direction of the material is just opposite to the entering direction of the hot air and the cold air. When the hot air is discharged from the hot air pipe 6, it will mix with the cold air and continue to move toward the feeding end of the drying cylinder 2. After the hot air meets the cold air, the temperature will be reduced to a certain extent, but the mixed gas can still dry the material until it reaches the feeding end of the drying cylinder 2. Then the gas is extracted by the vacuum pump 42, and after being removed by the cyclone separation device 8 and the water curtain dust removal device 9, the drying cylinder 2 is sealed by the air sealing device A11 and the air sealing device B13, which can prevent the material inside the drying cylinder 2 from flying out from the connection between the feed head 4, the discharge head 5 and the drying cylinder 2;

[0051] Due to gravity, the material will move toward the discharge end of the drying cylinder while the inclined drying cylinder 2 rotates, until it reaches the discharge port 53 on the discharge head 5, and is discharged due to its own gravity.

[0052] It should also be noted that: in actual use, the temperature of the hot air entering from the hot air inlet 52 is high (e.g., 80°C), and the temperature of the cold air entering from the cold air inlet 51 is low (e.g., 30°C). Due to the presence of the vacuum pump, the cold and hot air will be promoted to move toward the feed end: in the process of continuously moving toward the feed end, the cold air will successively encounter the material dried by the hot air, the hot air coming out of the outlet of the hot air pipe 6, and the material just entering the dryer. In each heat exchange, the temperature of the cold air presents a dynamic change of first rising and then falling; the hot air has the highest temperature when it just comes out of the outlet of the hot air pipe 6, but it will cause heat loss due to continuous contact with the material and the heated cold air, and the temperature will drop when it reaches the feed end. After the hot and cold air are completely mixed, they reach the feed end of the drying cylinder 2. At this time, the air temperature is between the hot and cold air temperatures (e.g., 40°C), which is suitable for drying and preheating the new material that has just entered the drying cylinder 2.

[0053] When the drying water volume of the material changes and the flow regulating hole 12 needs to be adjusted, the motor 3 is first turned off, and then the manhole 54 on the discharge head 5 is opened to allow the staff to enter the interior of the drying cylinder 2, and then the nut is manually loosened to loosen the adjusting plate 102. At this time, the adjusting bolt 103 is moved along the long hole 1011. When the adjusting bolt 103 moves toward the center point of the retaining ring 101, the distance between the adjusting plate 102 and the inner wall of the drying cylinder 2 increases, that is, the hole of the flow regulating hole 12 is enlarged, so that more materials pass through the flow regulating hole 12, so that the material stays in the drying cylinder 2 for a short time; similarly, when the adjusting bolt 103 moves toward the inner wall of the drying cylinder 2, the distance between the adjusting plate 102 and the inner wall of the drying cylinder 2 is reduced, that is, the hole of the flow regulating hole 12 is reduced, so that less materials pass through the flow regulating hole 12, so that the material stays in the drying cylinder 2 for a long time. Therefore, according to the moisture content of the feed material and the required moisture content of the discharge material, the size of the flow regulating hole 12 can be manually adjusted to control the residence time of the material in the drying cylinder 2 and ensure the quality of the material.

[0054] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the invention involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also includes other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical scheme.

Claims

1. An environmentally friendly rotary drum drying device with a cooling function, comprising a base (1) and a drying drum (2), wherein the drying drum (2) rolls relative to the base (1) via a motor (3), and is characterized in that: A feed seal (4) and a discharge seal (5) are respectively provided at the two ends of the drying cylinder (2); an air seal device A (11) is provided at the connection where the feed seal (4) is movably inserted into the drying cylinder (2); an air seal device B (13) is provided at the connection where the drying cylinder (2) is movably inserted into the discharge seal (5); a feed pipe (41) and an air pump (42) are fixedly provided on the feed seal (4); a cold air inlet (51), a hot air inlet (52) and a discharge port (53) are provided on the discharge seal (5); the discharge port (53) is located at the lower end of the discharge seal (5); the cold air inlet (51) is communicated with the interior of the drying cylinder (2); the hot air inlet (52) is communicated with the hot air pipe (6) in the drying cylinder (2); the hot air pipe (6) is fixed in the drying cylinder (2) via a support rod (7); The hot air entering the drying cylinder (2) through the hot air inlet (52) and the hot air duct (6) to dry the material is mixed with the cold air entering the drying cylinder (2) through the cold air inlet (51) at the middle part of the drying cylinder (2). The hot air is then extracted by the vacuum pump (42), dusted by the cyclone separation device (8) and the water curtain dust removal device (9), and then transferred to the air sealing device A (11) and the air sealing device B (13), thereby forming an air pressure difference with the interior of the drying cylinder (2) and achieving sealing of the drying cylinder (2).

2. The environmentally friendly rotary drying device with cooling function according to claim 1, characterized in that: The inclination angle between the drying cylinder (2) and the ground is 1.5°-2.5°.

3. The environmentally friendly rotary drying device with cooling function according to claim 2 is characterized in that: The hot air pipe (6) is a slotted sleeve, and a conical air cap (61) is provided at the air outlet of the hot air pipe (6).

4. The environmentally friendly rotary drying device with cooling function according to claim 2 is characterized in that: The air sealing device A (11) comprises an air inlet device (111) and a wind shield device (112), wherein the air inlet device (111) comprises an annular collar (1111), the air inlet device (111) is fixed to the feed seal head (4) via the annular collar (1111), an annular groove (1112) is provided at one end of the annular collar (1111) away from the feed seal head (4), the annular groove (1112) is communicated with a plurality of air inlets (1113) provided on the outer side wall of the annular groove (1112), the annular wind shield device (112) is fixed to the inner wall of the left end of the drying cylinder (2), the wind shield device (112) comprises an annular wind shield plate (1121) and an annular rubber ring (1122) fixed to the wind shield plate (1121) via bolts, and the spacing between the wind shield device (112) and the air inlet device (111) is 2 mm to 4 mm.

5. The environmentally friendly rotary drying device with cooling function according to claim 4 is characterized in that: The air sealing device B (13) comprises an air inlet pipe (131), an air shield ring A (132) and an air shield ring B (133); the air shield ring A (132) and the air shield ring B (133) are both fixed on the inner wall of the discharge sealing head (5); a plurality of the air inlet pipes (131) are uniformly inserted into the discharge sealing head (5) on the same plane; the air inlet pipe (131) is located between the air shield ring A (132) and the air shield ring B (133).

6. The environmentally friendly rotary drying device with cooling function according to claim 2, characterized in that: The discharge sealing head (5) is provided with a manhole (54).

7. An environmentally friendly rotary drying device with cooling function according to any one of claims 2 to 6, characterized in that: A plurality of middle partitions (10) are provided on the inner end surface of the drying cylinder (2), and a plurality of flow regulating holes (12) are evenly arranged on the middle partitions (10).

8. The environmentally friendly rotary drying device with cooling function according to claim 7, characterized in that: The middle partition (10) comprises a retaining ring (101), an adjusting plate (102) and an adjusting bolt (103); a long hole (1011) is provided in the radial direction of the retaining ring (101); the adjusting plate (102) is fixed to the retaining ring (101) by the adjusting bolt (103) passing through the long hole (1011); a hole between the inner wall of the drying cylinder (2) and the end face of the adjusting plate (102) adjacent to the inner wall of the drying cylinder (2) is the flow regulating hole (12); the fixing of the adjusting bolt (103) at different positions on the long hole (1011) drives the change of the distance between the adjusting plate (102) and the inner wall of the drying cylinder (2), thereby realizing the adjustment of the hole size of the flow regulating hole (12).

9. The environmentally friendly rotary drying device with cooling function according to claim 2, characterized in that: A plurality of lifting plates for lifting materials are provided on the inner wall of the drying cylinder (2), and the angle between the outer side of the lifting plates and the inner wall of the drying cylinder (2) is 2°-5°.

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