CN218915693U - Rotary dryer - Google Patents

Abstract

The utility model discloses a rotary dryer, which belongs to the technical field of dryers, and comprises a cylinder body, a first shoveling plate and a filter screen, wherein the cylinder body is provided with a drying cavity, a feed inlet and a discharge outlet, and the height of the feed inlet is higher than that of the discharge outlet; the first shoveling plates are connected to the inner wall of the cylinder body at intervals; the filter screen connect in the inner wall of barrel, the filter screen one-to-one is connected in body and kink, and the filter screen is located the one side that the corresponding first shoveling plate is close to the discharge gate, and the inner wall of filter screen, body, kink and barrel surrounds into the holding chamber that holds the material that waits to dry. The utility model improves the stay time of the materials with slower drying, shortens the stay time of the materials with faster drying, ensures the drying effect of the materials, improves the treatment efficiency of the cylinder body and realizes more effective utilization of heat energy.

Description

Rotary dryer

Technical Field

The utility model belongs to the technical field of drying equipment, and particularly relates to a rotary dryer.

Background

The drier is a device for reducing the water content of materials by utilizing heat energy, and the water content in wet materials is vaporized and escaped in a certain heating mode, so that the drier is widely applied to the drying of granular and powdery materials in the industries of chemical industry, mine, building materials, medical treatment and the like. The rotary dryer is provided with a barrel which is axially arranged along the horizontal direction and can rotate along the rotary dryer, the barrel is in high-temperature atmosphere, materials to be dried enter from one end of the barrel, and the materials dried by the high-temperature atmosphere in the barrel are discharged from the other end of the barrel.

In the prior art, in order to improve the drying efficiency of the dryer, a plurality of shoveling plates are generally arranged on the inner wall of the barrel, and the shoveling plates are distributed at intervals so as to lift the material to be dried in the barrel, for example: CN 215063603 discloses a shoveling plate structure for a rotary dryer, comprising a rotary drum, a first shoveling plate group and a second shoveling plate group, wherein the first shoveling plate group comprises a plurality of first shoveling plates arranged at intervals, the second shoveling plate group comprises a plurality of second shoveling plates arranged at intervals, the first shoveling plate group and the second shoveling plate group are staggered on the inner wall of the rotary drum along the circumferential direction of the rotary drum, the first shoveling plate and the second shoveling plate are both arranged obliquely relative to the axial direction of the rotary drum, and the inclination directions of the first shoveling plate and the second shoveling plate are opposite relative to a reference plane passing through the axial line; the shoveling plate structure provided by the utility model can enable materials to alternately move back and forth between the feed port end and the discharge port end of the rotary drum, so that the mixing degree of the materials is improved.

CN208671539 discloses a rotary dryer shoveling plate fixing structure, which comprises a dryer cylinder body and a shoveling plate body arranged in the dryer cylinder body, wherein the shoveling plate body is obliquely distributed on the inner wall of the dryer cylinder body, one side of the shoveling plate body is propped against the surface of the inner wall of the dryer cylinder body, an inclined support component is annularly distributed on the inner wall of the dryer cylinder body, the inclined support component comprises an inclined bending part and a connecting plate which are fixedly connected, the inclined bending part is fixedly connected with the inner wall of the dryer cylinder body, the shoveling plate body is connected with the connecting plate through bolts, and the included angle range between a tangent line passing through the intersection point of the shoveling plate body and the inner wall of the dryer cylinder body and the shoveling plate body is 27-33 degrees.

The dryer has the problems of low drying efficiency and energy waste.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the rotary dryer, which improves the material drying efficiency and saves energy.

The technical scheme of the utility model is as follows: there is provided a rotary dryer comprising:

the cylinder body can rotate around the axial direction of the cylinder body, the cylinder body is provided with a drying cavity, and a feed inlet and a discharge outlet which are communicated with two ends of the drying cavity, wherein the height of the feed inlet is higher than that of the discharge outlet;

the first shoveling plates are connected to the inner wall of the cylinder at intervals;

the filter screen, all be provided with on the first shoveling plate the filter screen corresponds, the filter screen connect in the barrel, first shoveling plate the filter screen with the barrel surrounds into the holding chamber that holds the material that waits to dry.

In some embodiments, the cylinder comprises a preheating section, a drying section and a discharging section which are sequentially arranged along the direction from the feeding port to the discharging port, the first shoveling plate and the filter screen are positioned in the drying section, the preheating section, the drying section and the discharging section are respectively provided with a cavity, and the cavities of the preheating section, the drying section and the discharging section are sequentially communicated to form the drying cavity.

In some embodiments, the first shoveling plate is provided with a plurality of filter holes.

In some embodiments, the size of the filter holes of the first shoveling plate increases sequentially along the direction from the feed inlet to the discharge outlet.

In some embodiments, the rotary dryer comprises a plurality of first shoveling plate units arranged at intervals along the circumferential direction of the cylinder, wherein each first shoveling plate unit comprises at least two first shoveling plates and a filter screen correspondingly connected with the first shoveling plates, and the at least two first shoveling plates are distributed in a spiral line with the axial direction of the cylinder as the center.

In some embodiments, the first shoveling plate extends along the spiral line, and in the rotation direction of the cylinder body, one side of the first shoveling plate, which is close to the feed inlet, is located at the front end relative to one side of the first shoveling plate, which is close to the discharge outlet.

In some embodiments, the first shoveling plate includes a body and a bending part connected to the body near the axis of the cylinder, an opening formed by the bending part and the body faces to the rotation direction of the cylinder, and the filter screen is connected to the body and the bending part.

In some embodiments, the first shoveling plate is welded to the barrel.

In some embodiments, the dryer further comprises a plurality of second shoveling plates positioned in the preheating section and arranged at intervals, and the second shoveling plates are connected to the inner wall of the cylinder.

In some embodiments, the rotary dryer includes a plurality of reinforcing structures located outside the receiving chamber, the reinforcing structures being connected to the inner wall of the drum and the first louver.

The beneficial effects of the utility model at least comprise:

the utility model provides a rotary dryer which comprises a cylinder, a first shoveling plate and a filter screen, wherein the cylinder can rotate around the axial direction of the cylinder, the cylinder is provided with a drying cavity, a feed inlet and a discharge outlet, the feed inlet and the discharge outlet are communicated with two ends of the drying cavity, and the height of the feed inlet is higher than that of the discharge outlet; the first shoveling plates are arranged in a plurality and are connected to the inner wall of the cylinder body at intervals; the first shoveling plates are respectively provided with a filter screen, and a containing cavity for containing materials to be dried is formed by surrounding the first shoveling plates and the filter screen on one side close to the feed inlet and the cylinder body. In the drying process, the cylinder rotates around the axial direction of the cylinder, the rotation direction is along the direction of the body towards the accommodating cavity, the material to be dried in the accommodating cavity enters the drying cavity of the cylinder from the feed inlet of the cylinder, the material to be dried firstly falls onto the inner wall of the lower part of the cylinder, the material falling onto the inner wall of the lower part of the cylinder rotates along with the cylinder, and the accommodating cavity upwards surges along with the rotation of the cylinder, part of the material can stay in the accommodating cavity, and under the supporting action of the first shoveling plate, the material moves to the top and falls down, and because the height of the feed inlet is higher than the height of the discharge outlet, the material to be dried in the accommodating cavity moves towards the discharge outlet along with the rotation of the cylinder, the finer material moves from the filter screen Kong Shaichu to the discharge outlet, the larger material is trapped by the filter screen and is continuously dried, the finer material is dried faster, the required stay time is short, the larger material is slower to be dried, the required stay time is long, the combined design of the filter screen and the first shoveling plate is matched with different materials to be dried, the stay time of the larger material is guaranteed, and the stay time of the material to be dried is shorter; meanwhile, the treatment efficiency of the cylinder body is improved, more materials to be dried can be fed into the cylinder body, the drying quantity is improved, and more effective utilization of heat energy is realized.

Drawings

FIG. 1 shows a schematic view of the internal structure of a cartridge according to an embodiment of the present application;

fig. 2 shows a full section view of another cartridge according to an embodiment of the present application, taken along a plane perpendicular to the axial direction of the drying chamber.

Reference numerals illustrate:

10-cylinder, 11-drying cavity, 12-feed inlet, 13-discharge outlet, 14-preheating section, 15-drying section and 16-discharge section; 20-a first shoveling plate, 21-a body and 22-a bending part; 30-filtering the mixture; 40-a second shoveling plate.

Detailed Description

In order to make the technical solution more clearly understood by those skilled in the art, the following detailed description is made with reference to the accompanying drawings.

The embodiment of the application provides a rotary dryer, fig. 1 shows a schematic diagram of the internal structure of a barrel of the embodiment of the application, and in combination with fig. 1, the rotary dryer comprises a barrel 10, a first shoveling plate 20 and a filter screen 30 for filtering materials to be dried, the barrel 10 can rotate around the axial direction of the barrel 10, the barrel 10 is provided with a drying cavity 11, a feed port 12 and a discharge port 13 which are communicated with two ends of the drying cavity 11, and the height of the feed port 12 of the drying cavity 11 is higher than that of the discharge port 13; the first shoveling plates 20 are provided in plurality, and the plurality of first shoveling plates 20 are connected to the inner wall of the cylinder 10 at intervals; the filter screen 30 is provided with a plurality of, and the first shoveling plate 20 is provided with the filter screen 30 respectively, and the first shoveling plate 20, one side of the filter screen 30 close to the feed inlet 12 and the barrel 10 enclose into a containing cavity for containing the materials to be dried.

The cylinder body 10 can be cylindrical or conical, the drying cavity 11 can be cylindrical or conical, and when the drying cavity 11 is cylindrical, the axial direction of the drying cavity 11 is inclined so as to ensure that the height of the bottom wall of the drying cavity 11 is sequentially reduced along the direction from the feeding hole 12 to the discharging hole 13; when the drying cavity 11 is in a frustum shape, the axial direction of the drying cavity 11 can be arranged along the horizontal direction, the big end of the drying cavity 11 is close to the feeding port 12, the small end of the drying cavity 11 is close to the discharging port 13, and the taper of the frustum shape can be adjusted according to the running speed of the materials to be dried; of course, the axial direction of the drying chamber 11 may also have a certain angle with the horizontal direction. The first shoveling plate 20 may be made of Q345 material. The filter screen 30 can be a metal net, and the filter holes can be round, hexagonal or quadrangular; the filter screen 30 and the first shoe 20 may be welded and connected with each other with high strength. The opening of the receiving chamber is oriented in the direction of rotation of the cylinder 10, in other words, the direction of rotation of the cylinder 10 should ensure that the opening of the receiving chamber is directed upwards when the receiving chamber is located on the ascending side of the cylinder 10. The drying process of the material to be dried is as follows: the material to be dried enters from the feed inlet 12 of the cylinder body 10, hot air passes through the drying cavity 11, and the hot air contacts with the material to be dried in the drying cavity 11 to take away moisture so as to realize the drying of the material, and the height of the feed inlet 12 is higher than the height of the discharge outlet 13 along the direction from the feed inlet 12 to the discharge outlet 13, so that the bottom wall of the drying cavity 11 is sequentially lowered, and the running direction of the material from the feed inlet 12 to the discharge outlet 13 under the action of gravity and centrifugal force is ensured; the first shoveling plate 20 can be arranged to lift the material upwards, so that the contact area of the material and hot air is increased, and the drying efficiency is improved; the size of the material to be dried is generally large, small and uneven, but the drying rate of the material with large size is slow, the drying rate of the material with small size is fast, the filter screen 30 is positioned on one side of the first shoveling plate 20 towards the rotation direction of the cylinder, specifically, the filter screen 30 is positioned on one side of the first shoveling plate 20 close to the discharge port 13, the filter screen 30 can enable the material with small size to be discharged from the filter holes of the filter screen 30 and rapidly move towards the discharge port 13, the material with large size is trapped by the filter screen 30 to improve the contact time with hot air, so that the dried material can be rapidly discharged, the processing capacity of the cylinder 10 is improved, and the drying effect of the material with large size is ensured. The running direction of the hot air in the accommodating cavity can be along the direction from the feed inlet 12 to the discharge outlet 13, or the direction from the discharge outlet 13 to the feed inlet 12, or the radial direction of the cylinder 10.

In some embodiments, referring to fig. 1, the barrel 10 includes a preheating section 14, a drying section 15, and a discharging section 16 sequentially disposed along a direction from the inlet 12 to the outlet 13, the first shoveling plate 20 and the filter screen 30 are disposed in the drying section 15, the preheating section 14, the drying section 15, and the discharging section 16 are each provided with a chamber, and the chambers of the preheating section 14, the drying section 15, and the discharging section 16 are sequentially connected to form the drying chamber 11. After the material to be dried is preheated in the preheating section 14, a part of the material with smaller size is dried, and the material with larger size is not dried, so that the drying section 15 has the requirement of separating the dried material from the non-dried material.

In some embodiments, the first handsheet 20 is provided with a plurality of filter holes. The filter holes can trap the material which is not dried completely in a large size, and discharge the dried material in a small size, so that the filtering capacity of the first shoveling plate 20 is improved. Since the first shoe 20 is more pressurized than the material received by the screen 30 when it moves to the rising side during the rotation of the cylinder 10, the thickness of the first shoe 20 is greater than the screen 30, so that the strength of the first shoe 20 is higher.

In some embodiments, the size of the filter holes of the first handsheet 20 increases in sequence in the direction from the inlet 12 to the outlet 13, and the size of the filter holes of the first handsheet 20 near the inlet 12 is larger than the size of the filter holes of the first handsheet 20 near the outlet 13. As the material is lifted and lifted in the drying section 15, the material gets closer to the discharge section 16, and the maximum size of the dried material becomes larger and larger, so that the maximum size of the material to be discharged is also gradually increased, and the size of the filter holes of the first shoveling plate 20 is gradually increased, which is favorable for discharging the material of the large-size drying head. In addition, the size of the filter holes of the first louver 20 is larger and larger in the direction from the inlet 12 to the outlet 13, but the size of the first louver 20 is fixed, and thus the number of filter holes of the first louver 20 is smaller and smaller. In addition, the size of the filtering holes of the filtering net 30 may be sequentially increased in the direction from the inlet 12 to the outlet 13.

In some embodiments, the rotary dryer comprises a plurality of first shoveling plate units, the first shoveling plate units are arranged at intervals along the circumferential direction of the cylinder 10, each first shoveling plate unit comprises at least two first shoveling plates 20 and a filter screen 30 connected with the first shoveling plates 20 in a one-to-one correspondence manner, the at least two first shoveling plates 20 are spirally distributed with the axial direction of the cylinder 10 as the center, stepped drying is formed on materials, the contact time of the materials and hot air is prolonged, and the drying effect of the materials is guaranteed. Specifically, the first shoveling plate extends along the spiral line, in the rotation direction of the cylinder 10, one side of the first shoveling plate 20, which is close to the feed inlet 12, is located at the front end relative to one side, which is close to the discharge outlet 13, of the cylinder, that is, when the first shoveling plate 20 is located on the ascending side of the cylinder 10, one end, which is close to the feed inlet 12, of the first shoveling plate 20 is higher than one end, which is close to the discharge outlet 13, so that the height of the bottom wall of the accommodating cavity along the direction from the feed inlet 12 to the discharge outlet 13 is sequentially reduced, the material is promoted to be rolled in the accommodating cavity, and the dried material with smaller size is discharged from the filter holes of the first shoveling plate 20 and the filter screen 30.

In some embodiments, referring to fig. 2, the included angle between the first shoveling plate 20 and the rotation direction of the cylinder 10 is 60 ° to 90 °, that is, the included angle between the tangent line of the connection point between the first shoveling plate 20 and the inner wall of the cylinder 10 and the first shoveling plate 20 is 60 ° to 90 °, the first shoveling plate 20 includes a body 21 and a bending portion 22 located at the end of the body 21, the bending portion 22 is connected to one side of the body 21 near the axial direction of the cylinder 10, and the included angle between the body 21 and the bending portion 22 is 100 ° to 120 °, so as to ensure that the material does not adhere to the inner wall of the cylinder 10, and also can prolong the drying time of the material in the cylinder 10 and improve the drying effect. The included angle between the tangent line of the connection point of the body 21 and the inner wall of the cylinder 10 and the body 21 is 60-90 degrees, the body 21 is distributed along the spiral line, the included angle between the tangent line of the connection point of the body 21 and the inner wall of the cylinder 10 and the body 21 can be adjusted according to actual needs, and the included angle between the body 21 and the bending part 22 is 100-120 degrees, which is also only an example and not limited in detail.

In some embodiments, the body 21 includes a first side and a second side disposed opposite to each other, the first side and the second side being connected to the inner wall of the barrel 10 and the bending portion 22, respectively, and a distance between the first side and the second side is 50-100mm; the diameter of the filtering holes of the filtering net 30 is 10-30mm, so that not only can the large-size undried materials be trapped, but also the small-size dried materials can be discharged.

In some embodiments, the first shoveling plate 20 is welded to the cylinder 10, and in other embodiments, the first shoveling plate 20 may be screwed to the cylinder 10, which is not limited in particular.

In some embodiments, the rotary dryer further comprises a plurality of second shoveling plates 40 connected to the inner wall of the drying chamber 11 and arranged at intervals, and the second shoveling plates 40 are located in the preheating section 14; the materials in the preheating section 14 are almost all undried materials, the materials in the section have great drying requirements, and the second shoveling plate 40 can be used for shoveling the materials in the preheating section 14 to the top end of the cylinder 10 and then descending, so that the contact area between the materials and hot air is increased. The preheating section 14 includes a plurality of groups of second shoveling plate units, the plurality of groups of second shoveling plate units are arranged at intervals along the circumferential direction of the cylinder 10, each group of second shoveling plate units includes a plurality of second shoveling plates 40, the second shoveling plates 40 of each group of second shoveling plate units are distributed in a spiral line with the axial direction of the cylinder 10 as the center, and the second shoveling plates 40 extend along the spiral line. In some embodiments, the specific structure of the second shoveling plate 40 may be the same as that of the first shoveling plate 20, that is, the end of the second shoveling plate 40 is also inclined relative to the radial direction of the cylinder, and the second shoveling plate 40 is in a spiral arrangement, so that adhesion of the material to the inner wall of the cylinder 10 due to excessive humidity can be avoided.

In some embodiments, the rotary dryer includes a plurality of reinforcing structures located outside the receiving chamber, and the reinforcing structures are connected to the inner wall of the cylinder 10, that is, the reinforcing structures are connected to one side of the body 21 of the first shoe 20, which is far from the screen 30 of the screen mesh. The reinforcing structures may be ribs or reinforcing plates, and the number of the reinforcing structures may be set according to needs, for example, two reinforcing structures are provided for each first shoveling plate 20; the reinforcing structure can be welded with the inner wall of the cylinder body 10, and the stability is good.

The working process of the rotary dryer provided by the embodiment of the application is as follows:

the cylinder 10 rotates around the central shaft of the cylinder during operation, the material to be dried enters the bottom wall of the chamber of the preheating section 14 from the feed inlet 12, moves upwards along with the rotating cylinder 10 under the action of friction force, slides downwards along the inner wall of the cylinder 10 until the material is gathered on the plurality of second shoveling plates 40 on the ascending side when the friction force is smaller than the gravity force of the material, and continuously ascends under the supporting action of the second shoveling plates 40 until the friction force between the material and the second shoveling plates 40 is smaller than the gravity force, and the material falls to the bottom wall of the cylinder 10 from the upper part of the drying cavity 11. The material to be dried moves toward the drying section 15 while rotating around the axial direction of the cylinder 10 by the second shoe 40 of the preheating section 14. The material with very small particle size in the material entering the drying section 15 is dried, the material with relatively large particle size is not dried completely, the dried small-size material can be discharged from the filtering holes of the shoveling plate or the filtering holes of the filter screen 30 and does not lift up to move to the discharging section, the material with relatively large size is trapped to generate circumferential and axial movement to the discharging section along with the shoveling plate, in the material with relatively large size, the material with relatively large size is continuously contacted with hot air along with the forward and circumferential movement, part of the material with relatively small size is dried, the dried material is rapidly discharged from the relatively large filtering holes of the shoveling plate, the material with relatively large particle size is continuously lifted by the shoveling plate, and so on until all the material is dried to enter the discharging section 16, and finally the material is discharged from the cylinder 10 through the discharging hole 13 to enter the next procedure.

The rotary dryer provided by the embodiment of the application is characterized in that the filter screen 30 and the first shoveling plate are combined and arranged in the drying section 15, so that the stay time of the materials which are relatively large and relatively slow to dry is improved, the stay time of the materials which are relatively small and relatively fast to dry is shortened, and the drying effect of the materials is ensured; meanwhile, the treatment efficiency of the cylinder 10 is improved, more materials to be dried can be fed into the cylinder 10, the drying capacity is improved, and more effective utilization of heat energy is realized.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (10)

1. A rotary dryer, comprising:

the cylinder body can rotate around the axial direction of the cylinder body, the cylinder body is provided with a drying cavity, and a feed inlet and a discharge outlet which are communicated with two ends of the drying cavity, wherein the height of the feed inlet is higher than that of the discharge outlet;

the first shoveling plates are connected to the inner wall of the cylinder at intervals;

the filter screen, all be provided with on the first shoveling plate corresponds the filter screen, the filter screen connect in the barrel, first shoveling plate the filter screen is close to one side of feed inlet and the barrel surrounds into the holding chamber that holds the material that waits to dry.

2. The rotary dryer of claim 1, wherein the barrel comprises a preheating section, a drying section and a discharge section which are sequentially arranged along the direction from the feed inlet to the discharge outlet, the first shoveling plate and the filter screen are positioned in the drying section, chambers are respectively arranged in the preheating section, the drying section and the discharge section, and the chambers of the preheating section, the drying section and the discharge section are sequentially communicated to form the drying chamber.

3. The rotary dryer of claim 2, wherein the first shoe is provided with a plurality of filter holes.

4. A rotary dryer according to claim 3, wherein the size of the filter holes of the first louver increases in sequence in a direction from the inlet to the outlet.

5. The rotary dryer according to any one of claims 1 to 4, comprising a plurality of first louver units disposed at intervals along the circumferential direction of the cylinder, wherein the first louver units include at least two first louvers and a filter screen correspondingly connected to the first louvers, and the at least two first louvers are distributed in a spiral line with the axial direction of the cylinder as the center.

6. The rotary dryer of claim 5, wherein the first louver extends along the spiral line, and a side of the first louver adjacent to the feed port is positioned at a front end with respect to a side adjacent to the discharge port in a rotational direction of the drum.

7. The rotary dryer of any one of claims 1 to 4 wherein the first shoe includes a body and a bend connected to the body proximate the axis of the drum, the bend and the body forming an opening oriented in a direction of rotation of the drum, the screen being connected to the body and the bend.

8. The rotary dryer of any one of claims 1-4 wherein the first shoe is welded to the barrel.

9. The rotary dryer of any one of claims 2 to 4 further comprising a plurality of spaced apart second shovels positioned within the preheating section, the second shovels being attached to an inner wall of the barrel.

10. The rotary dryer of any one of claims 1-4, wherein the rotary dryer includes a plurality of reinforcing structures located outside the receiving chamber, the reinforcing structures being attached to the inner wall of the drum and the first shoe.

Images