CN111442625A - A fly ash coal three-cylinder dryer - Google Patents

Abstract

The invention provides a three-cylinder dryer for fly ash coal, which comprises an intermediate cylinder, an outer cylinder and an inner cylinder, the inner cylinder is embedded in the intermediate cylinder, the intermediate cylinder is embedded in the outer cylinder, and a space between the outer cylinder and the intermediate cylinder is There is a first cavity, a second cavity is left between the middle cylinder and the inner cylinder, a heating column is installed on the center line of the inner cylinder, a third cavity is left between the inner cylinder and the heating column, the first cavity and the heating column are The inner wall of the second cavity is provided with a copy board, the inner wall of the third cavity is provided with a variety of deformed copy boards, and screens are installed on both the intermediate cylinder and the inner cylinder, wherein the screen mesh on the intermediate cylinder is The mesh number is less than the mesh number of the screen on the inner cylinder; the invention changes the traditional drying method of fly ash coal, adopts a layered structure in the three-cylinder dryer, and gradually dries it layer by layer. The uneven and irregular surface increases the heating area of the fly ash coal, which can fully and quickly complete the drying and improve the thermal efficiency.

Description

A fly ash coal three-cylinder dryer

technical field

The invention relates to the technical field of fly ash coal drying machinery, in particular to a fly ash coal three-cylinder dryer.

Background technique

With the country's increasingly stringent environmental protection requirements and the promotion of waste energy utilization, dry fly ash, as a mixed material for cement production, has a good market and has been in short supply, and it has jumped into a resource; only wet fly ash can be reasonably Only by drying with low energy consumption and simple process, can waste be turned into treasure, and the double harvest of social and economic benefits can be achieved.

The common dryer on the market is a single-cylinder type, which has a general drying effect, low efficiency, and a large floor space. At present, there are also three-cylinder dryers, but the drying effect is slightly lower than that of the single-cylinder dryer. It is better, but it does not fundamentally solve the problem of thorough drying and improving drying efficiency in the dryer itself, especially for fly ash coal, which is easy to form large lumpy nodules due to long-term accumulation and accumulation. It is difficult for the dryer to achieve the ideal drying effect. Therefore, these shortcomings in the prior art are improved, the heat in the dryer can be fully utilized, and the heat transmission is directional, and the fly ash coal is screened step by step in the dryer, layer by layer. The technical problem to be solved by the present invention is to filter to ensure that the final discharged product meets the requirement of drying.

SUMMARY OF THE INVENTION

The present invention aims to provide a fly ash coal three-cylinder dryer that overcomes the above problems or at least partially solves the above problems, so as to solve the problem that the drying efficiency of the dryer is low, the water vapor is repeatedly absorbed, and the drying cannot be uniform. All fly coal problems.

In order to achieve the above object, the technical scheme of the present invention is specifically realized in this way:

The present invention provides a three-cylinder dryer for fly ash coal, comprising an intermediate cylinder, an outer cylinder and an inner cylinder, the inner cylinder is embedded in the intermediate cylinder, the intermediate cylinder is embedded in the outer cylinder, and the outer cylinder and the intermediate cylinder are embedded A first cavity is left, a second cavity is left between the middle cylinder and the inner cylinder, a heating column is installed on the center line of the inner cylinder, a third cavity is left between the inner cylinder and the heating column, and the first cavity is And the inner wall of the second cavity is provided with a copying plate, and the inner wall of the third cavity is provided with a variety of deformed copying plates, the middle cylinder, the outer cylinder and the inner cylinder can be rotated, and the middle cylinder and the inner cylinder are all rotatable. A screen is installed, wherein the mesh number of the screen on the middle cylinder is less than the mesh number of the screen on the inner cylinder.

As a further solution of the present invention, one end of the outer cylinder is provided with a feeding mechanism, the other end of the outer cylinder is provided with a discharging mechanism, the feeding mechanism is supported by the feeding mounting frame, the discharging mechanism is installed by the discharging supporting frame, and the outer cylinder is Both ends are mounted on the feed mounting frame and the discharge support frame through bearings.

As a further solution of the present invention, the top of the feeding mechanism is provided with a feeding port, the lower end of the feeding port is installed between the outer cylinder and the middle cylinder, and the feeding port communicates with the first cavity and the outside of the dryer.

As a further solution of the present invention, a discharge port is provided in the middle position of the discharge mechanism, and the discharge port communicates the third cavity with the outside of the dryer.

As a further solution of the present invention, the deformed copy board is composed of a spiral structure, a trapezoidal structure and a rectangular structure arranged at intervals in sequence, wherein the deformed copy board of the spiral structure is arranged at both ends of the inner wall of the inner cylinder, and the deformed copy board of the trapezoidal structure and the rectangular structure is arranged at intervals. The plates are arranged between the deformed plates of the helical structure.

As a further solution of the present invention, an annular cavity is arranged on the circumference of the heating column, a heating tube is installed in the annular cavity, a heat conduction plate is arranged on the outer side of the heating tube, and a heat insulation plate is arranged on the inner side of the heating tube.

As a further solution of the present invention, both the intermediate cylinder and the inner cylinder are provided with screen meshes, and the mesh meshes are fixedly installed by spoke plates. The spoke plates are formed by the combination of a plurality of annular hoops arranged at intervals and straight bars arranged at intervals along the axial direction. The screen is fixed on the spoke plate by connecting bolts, and the spoke plate is made of hard material.

As a further solution of the present invention, an infinite number of leaks are arranged in the middle of the screen, the leaks communicate with two different chambers, and the mesh of the screen is 60 mesh, 120 mesh, 180 mesh or 300 mesh.

The inner surface of the screen is provided with a movable strip plate, one long side of the strip plate is installed through a rotating shaft, and the other side of the strip plate is movably installed.

As a further solution of the present invention, both end faces of the intermediate cylinder and the inner cylinder are connected to the outer cylinder on one end face, and one end of the heating column is installed on the end face of the outer cylinder on one side of the feeding mechanism.

The invention provides a three-cylinder dryer for fly ash coal, and the beneficial effects are: the invention changes the traditional drying method of fly ash coal, adopts a layered structure in the three-cylinder dryer, and gradually layer Layer drying, and the dried agglomerated fly ash coal is dispersed and then passed through the screen, and the fine fly ash coal that has been separated and preliminarily dried is gathered towards the heat source of the heating column. In addition, the fly ash coal is fully dried. Various shapes of deformed copying boards are arranged on the inner wall of the inner cylinder. The uneven and irregular surface increases the heating area of the fly ash coal, which can be fully and quickly completed and dry to improve thermal efficiency. effect.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic diagram of an overall three-dimensional structure provided by an embodiment of the present invention.

FIG. 2 is a schematic diagram of the internal structure of the three cylinders cut along the center line according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an internal front structure of a three-cylinder provided by an embodiment of the present invention.

FIG. 4 is a schematic diagram of a three-cylinder radial cross-sectional structure according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of an installation structure of a screen mesh and a spoke plate according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a material direction provided by an embodiment of the present invention.

In the figure: 1. Transmission belt; 2. Outlet support frame; 3. Tug device; 4. Coupling; 5. Frequency conversion motor; 6. Base; 7. Feeding mounting frame; 8. Feeding mechanism ; 9, the middle cylinder; 10, the outer cylinder; 11, the discharge mechanism; 12, the inner cylinder; 13, the deformation copy plate; 14, the heating column; 15, the heating pipe; 16, the spoke plate; 17, the copy plate; 18, Screen; 19, leak; 20, connecting bolt; 21, feed port; 22, discharge port; 23, first cavity; 24, second cavity; 25, third cavity.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

Referring to Figures 1 to 6, a three-cylinder dryer for fly ash coal provided by an embodiment of the present invention includes an intermediate cylinder 9, an outer cylinder 10 and an inner cylinder 12, and the inner cylinder 12 is embedded in the intermediate cylinder 9, The middle tube 9 is embedded in the outer tube 10, a first cavity 23 is left between the outer tube 10 and the middle tube 9, a second cavity 24 is left between the middle tube 9 and the inner tube 12, and the center line of the inner tube 12 There is a heating column 14 installed on it, a third cavity 25 is left between the inner cylinder 12 and the heating column 14, a copy plate 17 is arranged on the inner walls of the first cavity 23 and the second cavity 24, and the third cavity 25 There are various shapes of deformed copying plates 13 on the inner wall of the screen, the intermediate cylinder 9, the outer cylinder 10 and the inner cylinder 12 can all be rotated, and the screen mesh 18 is installed on the intermediate cylinder 9 and the inner cylinder 12. The mesh number of the screen 18 is less than the mesh number of the screen 18 on the inner cylinder 12, that is, the rough fly ash with moisture first enters the first cavity 23, and after preliminary drying, a relatively small amount of water is produced. Fine particles, smaller particles fall into the second cavity 24 from the screen 18 on the intermediate cylinder 9, and are dried and separated into the second cavity 24 to separate the fine particles, and these fine particles pass through the inner cylinder 9. The screen mesh enters the third cavity 25, and the fine particles of fly ash and coal continue to be dried in the third cavity 25, and are in direct contact with the heating column 14, fully dried, and discharged from the discharging mechanism 11.

Preferably, one end of the outer cylinder 10 is provided with a feeding mechanism 8, the other end of the outer cylinder 10 is provided with a discharging mechanism 11, the feeding mechanism 8 is supported by the feeding mounting frame 7, and the discharging mechanism 11 is installed by the discharging supporting frame 2, Both ends of the outer cylinder 10 are mounted on the feeding mounting frame 7 and the discharging support frame 2 through bearings, so that the outer cylinder 10 can rotate between the feeding mechanism 8 and the discharging mechanism 11 .

Preferably, the top of the feeding mechanism 8 is provided with a feeding port 21, the lower end of the feeding port 21 is installed between the outer cylinder 10 and the intermediate cylinder 9, and the feeding port 21 communicates with the first cavity 23 and the outside of the dryer, so that the Moist fly ash coal can enter the dryer.

Preferably, a discharge port 22 is provided in the middle position of the discharge mechanism 11, and the discharge port 22 communicates the third cavity 25 with the outside of the dryer.

Preferably, a plurality of annular transmission belts 1 are arranged on the outside of the outer cylinder 10, the transmission belt 1 is fixedly installed with the outer cylinder 10, the transmission belt 1 is installed in close contact with the tug device 3, and the tug device 3 is installed on the base 6, The tugboat device 3 is connected with the variable frequency speed regulating motor 5 through the coupling 4 , so that the tugboat device 3 can drive the outer cylinder 10 to rotate.

Preferably, the deformed copying plate 13 is composed of a spiral structure, a trapezoidal structure and a rectangular structure arranged at intervals in sequence, wherein the deformed copying plate 13 of the spiral structure is arranged at both ends of the inner wall of the inner cylinder 12, and the deformed copying plate 13 of the trapezoidal structure and the rectangular structure is arranged Between the deformed copying plates 13 of the spiral structure, the fly ash coal can be sufficiently dispersed and dissipated in the inner cylinder 12, thereby improving the drying quality of the fly ash coal.

Preferably, an annular cavity is provided on the circumference of the heating column 14, a heating tube 15 is installed in the annular cavity, a heat conduction plate is arranged on the outer side of the heating tube 15, a heat insulation plate is arranged on the inner side of the heating tube 15, and the heating column 14 The heat is diffused from the middle of the dryer to the outside, the heat is first stored in the third cavity 25, and the fly ash coal in the third cavity 25 is preferentially dried, and then the heat enters the second cavity through the screen 18 24. Dry the finer fly ash coal in the second cavity 24, and finally enter the first cavity 23 through the screen 18, and the heat dries the initial fly ash coal, and this The method spreads the evaporated water vapor to the outer layer of the net to avoid the secondary moisture absorption of the fly ash coal in the same chamber, so that the drying of the fly ash coal is not complete, and the energy consumption is increased. This method is used in the third cavity 25 The water vapor in the water vapor is absorbed by the fly ash coal in the second cavity 24. At this time, the fly ash coal is evaporated again, absorbed by the original fly ash coal in the first cavity 23, and finally discharged to the outside, so that the dried The fly ash coal can be screened layer by layer, and the fly ash coal finally dried has no moisture at all, and the treatment is high.

Preferably, both the intermediate cylinder 9 and the inner cylinder 12 are provided with screens 18, and the screens 18 are fixedly installed by the spoke plates 16. The spoke plates 16 are formed by a combination of a plurality of annular hoops arranged at intervals and straight bars arranged at intervals along the axial direction. The screen 18 is fixed on the spoke plate 16 by connecting bolts 20. The spoke plate 16 is a hard material, which can not only install the screen 18, but also connect the two ends of the intermediate cylinder 9 or the inner cylinder 12.

Preferably, an infinite number of leaks 19 are arranged in the middle of the screen 18, and the leaks 19 communicate with two different chambers. Selection is required, and the mesh numbers of the intermediate cylinder 9 and the inner cylinder 12 are not the same.

Preferably, in order to prevent the fly ash coal in the inner layer from flowing back to the previous chamber below the inner cylinder 12, the inner surface of the screen 18 is provided with a movable strip plate, and one long side of the strip plate is installed through the rotating shaft, The other side of the strip plate is movably installed. When the dryer rotates to the bottom, the strip plate is closed, so that the fly ash in the third cavity 25 cannot fall into the second cavity 24. The fly ash coal in the cavity 24 cannot fall into the first cavity 23. When the dryer rotates upward to a position parallel to the center line, the strip plate is opened, and the fly ash coal can be released from the first cavity 23 at this time. It falls into the second cavity 24 and falls into the third cavity 25 from the second cavity 24 .

Preferably, the two end faces of the middle cylinder 9 and the inner cylinder 12 are on the same end face with the outer cylinder 10, and one end of the heating column 14 is installed on the end face of the outer cylinder 10 on the side of the feeding mechanism 8, so as to facilitate the flow of the fly ash and coal. Drain and stir.

The working principle of the present invention: the external transmission mechanism injects wet fly ash coal from the feed port 21 into the first cavity 23, the variable frequency speed regulation motor 5 drives the outer cylinder 10 to drive the dryer to rotate, and the outer cylinder 10 drives the middle The cylinder 9, the outer cylinder 10 and the heating column 14 all rotate, the heat is emitted from the heating column 14, and the heat is transferred from the third cavity 25 to the second cavity 24 and then to the first cavity 23. The initially wet fly ash coal in the cavity 23 is dried, and after being preliminarily dried and scattered by the copying plate 17 in the first cavity 23, part of the finer fly ash coal enters the first cavity through the screen 18 of the intermediate cylinder 9. In the second cavity 24, the finer fly ash coal continues to be dried in the second cavity 24, and continues to be pulverized under the action of the copying plate therein, and the pulverized fly ash coal enters the third cavity 25, and the fine powder The ash coal is directly in contact with the heat source, and is fully dried. Under the action of the deformed copying plate 13, the heated area and the number of heating are continuously increased to make it fully dried. Finally, the deformed copying plate 13 of the screw mechanism passes through the discharge port 22. output, complete drying.

The above are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (10)

1. A three-cylinder dryer for fly ash coal, characterized in that it comprises an intermediate cylinder (9), an outer cylinder (10) and an inner cylinder (12), and the inner cylinder (12) is embedded in the intermediate cylinder (9). ), the intermediate cylinder (9) is embedded in the outer cylinder (10), a first cavity (23) is left between the outer cylinder (10) and the intermediate cylinder (9), and the intermediate cylinder (9) and the inner cylinder (12) A second cavity (24) is left between the inner cylinder (12), a heating column (14) is installed on the centerline of the inner cylinder (12), and a third cavity (24) is left between the inner cylinder (12) and the heating column (14). 25), the inner wall of the first cavity (23) and the second cavity (24) are provided with a copy board (17), and the inner wall of the third cavity (25) is provided with a deformed copy board (17) of various shapes. 13), the intermediate cylinder (9), the outer cylinder (10) and the inner cylinder (12) can all be rotated, and a screen (18) is installed on the intermediate cylinder (9) and the inner cylinder (12), wherein the intermediate cylinder ( 9) The mesh number of the upper screen (18) is less than the mesh number of the upper screen (18) of the inner cylinder (12). 2. The three-cylinder dryer for fly ash and coal according to claim 1, wherein one end of the outer cylinder (10) is provided with a feeding mechanism (8), and the other end of the outer cylinder (10) is provided with a discharging mechanism The mechanism (11), the feeding mechanism (8) is supported by the feeding mounting frame (7), the discharging mechanism (11) is installed by the discharging supporting frame (2), and both ends of the outer cylinder (10) are mounted on the feeding frame through bearings. on the installation frame (7) and the discharge support frame (2). 3. The three-cylinder dryer for fly ash and coal according to claim 2, wherein the top of the feeding mechanism (8) is provided with a feeding port (21), and the lower end of the feeding port (21) is installed outside Between the cylinder (10) and the intermediate cylinder (9), the feeding port (21) communicates with the first cavity (23) and the outside of the dryer. 4. The three-cylinder dryer for fly ash and coal according to claim 2, characterized in that, a discharge port (22) is provided in the middle position of the discharge mechanism (11), and the discharge port (22) stores the first The three cavities (25) communicate with the outside of the dryer. 5. The three-cylinder dryer for fly ash and coal according to claim 1, characterized in that, the deformed copy plate (13) consists of a spiral structure, a trapezoidal structure and a rectangular structure arranged at intervals in sequence, wherein the deformed copy plate of the helical structure is formed at intervals. The plates (13) are arranged at both ends of the inner wall of the inner cylinder (12), and the deformed copying boards (13) of the trapezoidal structure and the rectangular structure are arranged between the deformed copying boards (13) of the spiral structure. 6. The three-cylinder dryer for fly ash and coal according to claim 1, wherein an annular cavity is provided on the circumference of the heating column (14), and a heating pipe (15) is installed in the annular cavity. The outer side of the heating pipe (15) is provided with a heat conduction plate, and the inner side of the heating pipe (15) is provided with a heat insulation plate. 7. The fly ash coal three-cylinder dryer according to claim 1, wherein the intermediate cylinder (9) and the inner cylinder (12) are both provided with a screen (18), and the screen (18) The spoke plates (16) are fixedly installed, and the spoke plates (16) are formed by a combination of a plurality of annular hoops arranged at intervals and straight bars arranged at intervals along the axial direction. The screen mesh (18) is fixedly installed on the spokes through connecting bolts (20). On the plate (16), the spoke plate (16) is made of hard material. 8 . The three-cylinder dryer for fly ash and coal according to claim 1 , wherein a plurality of leak openings ( 19 ) are arranged in the middle of the screen ( 18 ), and the leak openings ( 19 ) communicate with two different In the chamber, the mesh number of the screen (18) is 60 mesh, 120 mesh, 180 mesh or 300 mesh. 9 . The three-cylinder dryer for fly ash and coal according to claim 8 , wherein the inner surface of the screen (18) is provided with a movable strip plate, and one long side of the strip plate passes through the rotating shaft. 10 . Installation, the other side of the strip plate is installed flexibly. 10. The three-cylinder dryer for fly ash and coal according to claim 1, characterized in that, the two end faces of the middle cylinder (9) and the inner cylinder (12) are connected to the outer cylinder (10) through one end face One end of the heating column (14) is mounted on the end face of the outer cylinder (10) on one side of the feeding mechanism (8).

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