Conveying device for pulverized coal calcination

Abstract

The utility model relates to the technical field of calcination, and discloses a conveying device for pulverized coal calcination. The conveying device for pulverized coal calcination comprises a supporting frame, an adapting pipe is fixedly installed in the supporting frame, a connecting frame is fixedly installed above the adapting pipe, a driving motor is installed in the connecting frame in a penetrating and inserting mode, and a connecting shaft is fixedly installed at the lower end of the driving motor. When the pulverized coal falls into the receiving pipe, the surface temperature of the receiving pipe is increased, and the pulverized coal absorbs heat of the receiving pipe after falling into the receiving pipe, so that moisture in the pulverized coal is evaporated, and the pulverized coal is kept in a dry state; the driving motor can drive the connecting shaft to rotate, and the stirring rod on the outer side of the connecting shaft rotates by taking the axis of the connecting shaft as a reference; by means of the mode, part of water in the pulverized coal is eliminated, the initial temperature of the pulverized coal is increased, and the pulverized coal enters the furnace in a dry state.

Description

Technical Field

[0001] The utility model relates to the technical field of calcination, in particular to a conveying device for calcining coal powder. Background Art

[0002] As an important renewable energy source, pulverized coal is widely used in various chemical and metallurgical enterprises, mainly for combustion heating and steam generation processes. Compared with traditional fuels, pulverized coal has the advantages of high energy content and low pollution, and is known as "organic fossil fuel".

[0003] The existing Chinese utility model patent with reference announcement number: 204201925 discloses a conveying device for coal powder calcining, including a frame, a feeding bin, a feeding bin, and a blower. The bottom end of the feeding bin is provided with a feeding hole, and a connecting pipeline is provided on the frame. The middle end of the connecting pipeline is provided with a star feeder and an air suction pipe for absorbing the air generated by the feeding bin. A weighing component convenient for weighing the coal powder is movably connected to the frame; the advantages of the utility model are as follows: the air generated in the feeding bin is absorbed by the air suction pipe controlled by the air suction fan, which effectively improves the feeding efficiency of the coal powder in the feeding bin, avoids the discomfort existing in the existing coal powder feeding, and improves the calcining efficiency. When feeding, only the feeding speed of the star feeder needs to be adjusted to control the conveying effect of the coal powder, thereby improving the safety performance and the practical performance. Through the setting of the weighing component, it is effectively guaranteed that the weight of the coal powder entering the calcining equipment each time is within a constant range, which effectively reduces the loss of coal powder, has good use effect, and is simple in structure.

[0004] Since powdered particles absorb moisture from the air during storage, the moisture evaporates and absorbs a large amount of heat when the coal powder is burned, which will cause the flame temperature to drop. In addition, since the oxygen in the furnace will be consumed over time, the existing conveying device may cause the coal powder to become compacted during the conveying process, affecting the combustion efficiency of the coal powder. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a conveying device for coal powder calcination, which has the advantages of being able to improve the combustion efficiency of coal powder and enable the coal powder to enter the furnace in a relatively dry state, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a conveying device for coal powder calcining, comprising: a support frame, a receiving tube is fixedly installed inside the support frame, and a connecting frame is fixedly installed above the receiving tube, a driving motor is inserted and installed inside the connecting frame, and a connecting shaft is fixedly installed at the lower end of the driving motor, a stirring rod is fixedly installed on the outer side of the connecting shaft, a heating coil is fixedly installed on the outer side of the receiving tube, a connecting pipe is fixedly installed below the receiving tube, a conveying pipe is fixedly installed below the connecting pipe, and a fixed frame is inserted and installed on the outer side of the conveying pipe, a transfer tube is fixedly installed at the front end of the conveying pipe, an inclined tube is inserted and installed at the front end of the transfer tube, a bent pipe is fixedly installed at the front end of the inclined pipe, a five-way pipe is fixedly installed at the end of the bent pipe, and a fan is fixedly installed at the front end of the five-way pipe; the support frame can support the receiving tube.

[0009] As the preferred technical solution of the utility model, a support ring is fixedly installed on the top of the receiving tube, and a discharge pipe is fixedly installed inside the support ring, a connecting block is fixedly installed on the front side of the discharge pipe, and a discharge motor is inserted and installed inside the connecting block; the receiving tube can receive coal powder.

[0010] As the preferred technical solution of the utility model, a discharging shaft is fixedly installed at the rear end of the discharging motor, a gate valve is fixedly installed above the discharging pipe, and a charging hopper is fixedly installed at the upper end of the gate valve; the discharging motor can drive the discharging shaft to rotate.

[0011] As a preferred technical solution of the utility model, the lower end of the support frame is in contact with the ground, the lower end of the receiving tube is a conical structure, the drive motor is fixedly connected to the receiving tube through the connecting frame, and the axis of the drive motor shaft is in the same straight line as the axis of the receiving tube; the drive motor can drive the connecting shaft to rotate.

[0012] As the preferred technical solution of the utility model, the connecting shaft is fixedly connected to the rotating shaft of the driving motor, the stirring rod is installed in a ring shape on the outside of the connecting shaft with the axis of the connecting shaft as the reference, and the end of the stirring rod is embedded in the inner wall of the receiving tube; the connecting shaft can drive the stirring rod to rotate.

[0013] As the preferred technical solution of the utility model, the conveying pipe is connected with the receiving pipe through a connecting pipe, the rotation angle of the inclined pipe in the vertical axis is forty-five degrees, and the rotation angle in the front and rear horizontal axis is forty-five degrees. The inclined pipe is installed on the front side of the inclined pipe at a clockwise angle of ninety degrees based on the center of the transfer pipe; the conveying pipe can limit the movement direction of the coal powder.

[0014] As the preferred technical solution of the utility model, the bent pipe is installed in the shape of a cross at the upper, lower, left and right outlets of the five-way pipe with the center of the five-way pipe as the reference. The five-way pipe is connected to the fan, and a receiving frame is fixedly installed below the fan. The bent pipe can facilitate the connection between the oblique pipe and the five-way pipe.

[0015] Compared with the prior art, the utility model provides a conveying device for coal powder calcination, which has the following beneficial effects:

[0016] 1. The utility model sets a heating coil. After the heating coil is started, the surface temperature of the receiving tube rises. After the coal powder falls into the receiving tube, it absorbs the heat of the receiving tube, thereby evaporating the moisture inside the coal powder, so that the coal powder remains in a relatively dry state. The driving motor can drive the connecting shaft to rotate, so that the stirring rod outside the connecting shaft rotates with the axis of the connecting shaft as the reference, so as to break up the compacted coal powder. In this way, part of the moisture of the coal powder is eliminated, and the initial temperature of the coal powder is increased, so that the coal powder enters the furnace in a relatively dry state.

[0017] 2. The utility model adopts the arrangement of the oblique tube. When the fan is started, the airflow generated will pass through the five-way pipe, the elbow pipe and the oblique tube and enter the inside of the transfer tube. The oblique tube will limit the movement direction of the airflow so that the movement direction of the airflow is tangent to the transfer tube. Due to the clockwise installation of the oblique tube, after the airflow enters the transfer tube, a clockwise rotating vortex will be formed. The vortex will move to the rear side of the conveying pipe, and the pulverized coal inside the conveying pipe will reach a fluidized state through the vortex. The pulverized coal in the fluidized state will move from the front end of the conveying pipe to the rear end of the conveying pipe driven by the airflow. In this way, air can be conveyed into the furnace while conveying the pulverized coal, so that the pulverized coal and the air are fully mixed. After entering the kiln or rotary kiln, the pulverized coal can be burned quickly to improve the combustion efficiency of the pulverized coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the receiving pipe and the driving motor of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the fan and the conveying pipe of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection and installation structure of the charging hopper and the receiving pipe of the utility model;

[0022] Among them: 1. Support frame; 11. Undertaking tube; 12. Connecting frame; 13. Driving motor; 14. Connecting shaft; 15. Stirring rod; 16. Heating coil; 2. Connecting pipe; 21. Delivery pipe; 22. Fixed frame; 23. Transfer pipe; 24. Oblique pipe; 25. Bend pipe; 26. Five-way; 27. Fan; 28. Undertaking frame; 3. Support ring; 31. Discharge pipe; 32. Connecting block; 33. Discharge motor; 34. Discharge shaft; 35. Gate valve; 36. Feeding hopper. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 — Figure 4 In this embodiment, a conveying device for coal powder calcination includes: a support frame 1, a receiving tube 11 is fixedly installed inside the support frame 1, and a connecting frame 12 is fixedly installed above the receiving tube 11, a driving motor 13 is inserted into the connecting frame 12, and a connecting shaft 14 is fixedly installed at the lower end of the driving motor 13, a stirring rod 15 is fixedly installed on the outer side of the connecting shaft 14, and a heating coil 16 is fixedly installed on the outer side of the receiving tube 11.

[0027] The lower end of the support frame 1 is in contact with the ground, the lower end of the receiving tube 11 is a conical structure, the drive motor 13 is fixedly connected to the receiving tube 11 through the connecting frame 12, and the axis of the drive motor 13 and the axis of the receiving tube 11 are in the same straight line.

[0028] The connecting shaft 14 is fixedly connected to the rotating shaft of the driving motor 13 . The stirring rod 15 is annularly installed on the outside of the connecting shaft 14 with the axis of the connecting shaft 14 as a reference, and the end of the stirring rod 15 is embedded in the inner wall of the receiving tube 11 .

[0029] Specifically, the support frame 1 can support the receiving tube 11, the receiving tube 11 can receive the coal powder, the connecting frame 12 can fix the relative position between the driving motor 13 and the receiving tube 11, the driving motor 13 can drive the connecting shaft 14 to rotate, the connecting shaft 14 can drive the stirring rod 15 to rotate, the stirring rod 15 can break up the compacted coal powder, and the heating coil 16 can increase the temperature of the inner wall of the receiving tube 11.

[0030] A connecting pipe 2 is fixedly installed below the receiving pipe 11, a conveying pipe 21 is fixedly installed below the connecting pipe 2, and a fixing frame 22 is inserted and installed on the outer side of the conveying pipe 21, a transfer pipe 23 is fixedly installed at the front end of the conveying pipe 21, an inclined pipe 24 is inserted and installed at the front end of the transfer pipe 23, a bent pipe 25 is fixedly installed at the front end of the inclined pipe 24, a five-way 26 is fixedly installed at the end of the bent pipe 25, and a fan 27 is fixedly installed at the front end of the five-way 26.

[0031] The conveying pipe 21 is connected to the receiving pipe 11 through the connecting pipe 2. The rotation angle of the inclined pipe 24 in the vertical axis is forty-five degrees, and the rotation angle in the front and rear horizontal axis is forty-five degrees. The inclined pipe 24 is installed on the front side of the inclined pipe 24 at a clockwise angle of ninety degrees based on the center of the transfer pipe 23.

[0032] The elbow 25 is installed in a "cross" shape at the upper, lower, left and right four outlets of the five-way 26 with the center of the five-way 26 as the reference. The five-way 26 is connected to the fan 27, and a receiving frame 28 is fixedly installed below the fan 27.

[0033] Specifically, the connecting pipe 2 can connect the receiving pipe 11 with the conveying pipe 21, the conveying pipe 21 can limit the movement direction of the coal powder, the fixing frame 22 can support the conveying pipe 21, the transfer pipe 23 can facilitate the connection of the inclined pipe 24 with the conveying pipe 21, the inclined pipe 24 can make the airflow movement direction tangent to the inner wall of the transfer pipe 23, the bent pipe 25 can facilitate the connection of the inclined pipe 24 with the five-way 26, the five-way 26 can guide the airflow in four different directions, the fan 27 can generate airflow, and the receiving frame 28 can support the fan 27.

[0034] A support ring 3 is fixedly installed above the receiving tube 11 , and a discharge pipe 31 is fixedly installed inside the support ring 3 . A connecting block 32 is fixedly installed on the front side of the discharge pipe 31 , and a discharge motor 33 is inserted and installed inside the connecting block 32 .

[0035] A discharge shaft 34 is fixedly mounted on the rear end of the discharge motor 33 , a gate valve 35 is fixedly mounted above the discharge pipe 31 , and a charging hopper 36 is fixedly mounted on the upper end of the gate valve 35 .

[0036] Specifically, the support ring 3 can support the discharge pipe 31, the discharge pipe 31 can limit the movement direction of the coal powder, the connecting block 32 can fix the relative position between the discharge motor 33 and the discharge pipe 31, the discharge motor 33 can drive the discharge shaft 34 to rotate, the discharge shaft 34 can control the falling speed of the coal powder, the gate valve 35 can facilitate the control of the transportation of the coal powder, and the feeding hopper 36 can facilitate the addition of coal powder.

[0037] When in use, firstly, the end of the conveying pipe 21 needs to be connected with the kiln or rotary kiln, and the coal powder is poured into the inside of the charging hopper 36, and then the gate valve 35 is opened. The coal powder will fall through the gate valve 35 to the top of the discharge shaft 34 inside the discharge pipe 31, and the discharge motor 33 drives the discharge shaft 34 to rotate, so that the discharge shaft 34 drives the coal powder above to rotate to the bottom of the axis of the discharge shaft 34, so that the coal powder falls into the inside of the receiving tube 11 under the action of its own gravity. Due to the setting of the heating coil 16, the heating coil 16 will increase the surface temperature of the receiving tube 11 after starting. After the coal powder falls into the inside of the receiving tube 11, it will absorb the heat of the receiving tube 11, thereby evaporating the moisture inside the coal powder and keeping the coal powder in a relatively dry state. The driving motor 13 can drive the connecting shaft 14 to rotate, so that the stirring rod 15 outside the connecting shaft 14 rotates with the axis of the connecting shaft 14 as the reference, so as to facilitate the plate The lumped coal powder is broken up and guided by the conical structure at the lower end of the receiving pipe 11, the coal powder enters the interior of the conveying pipe 21 through the connecting pipe 2. Through the setting of the fan 27, the airflow generated when the fan 27 is started will enter the interior of the transfer pipe 23 through the five-way 26, the elbow 25, and the inclined pipe 24. The inclined pipe 24 will limit the movement direction of the airflow, so that the movement direction of the airflow is tangent to the transfer pipe 23. Due to the installation method of the inclined pipe 24, after the airflow enters the transfer pipe 23, a clockwise rotating vortex will be formed. The coal powder in the conveying pipe 21 is fluidized by the vortex. The fluidized coal powder will move from the front end of the conveying pipe 21 to the rear end of the conveying pipe 21 driven by the airflow. In this way, air can be conveyed into the furnace while conveying the coal powder, so that the coal powder and the air are fully mixed, so that after entering the kiln or rotary kiln, the coal powder can be burned quickly to improve the combustion efficiency of the coal powder.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conveying device for coal powder calcination, characterized in that: include: A support frame (1), wherein a receiving tube (11) is fixedly installed inside the support frame (1), and a connecting frame (12) is fixedly installed above the receiving tube (11), a driving motor (13) is inserted into the connecting frame (12), and a connecting shaft (14) is fixedly installed at the lower end of the driving motor (13), a stirring rod (15) is fixedly installed on the outer side of the connecting shaft (14), a heating coil (16) is fixedly installed on the outer side of the receiving tube (11), and a heating coil (16) is fixedly installed below the receiving tube (11). A connecting pipe (2) is provided, a conveying pipe (21) is fixedly installed below the connecting pipe (2), a fixing frame (22) is inserted and installed on the outside of the conveying pipe (21), a transfer pipe (23) is fixedly installed at the front end of the conveying pipe (21), an inclined pipe (24) is inserted and installed at the front end of the transfer pipe (23), a bent pipe (25) is fixedly installed at the front end of the inclined pipe (24), a five-way pipe (26) is fixedly installed at the end of the bent pipe (25), and a fan (27) is fixedly installed at the front end of the five-way pipe (26).

2. A conveying device for calcining coal powder according to claim 1, characterized in that: A support ring (3) is fixedly installed above the receiving tube (11), and a discharge pipe (31) is fixedly installed inside the support ring (3). A connecting block (32) is fixedly installed on the front side of the discharge pipe (31), and a discharge motor (33) is inserted and installed inside the connecting block (32).

3. A conveying device for calcining coal powder according to claim 2, characterized in that: A discharging shaft (34) is fixedly mounted on the rear end of the discharging motor (33), a gate valve (35) is fixedly mounted above the discharging pipe (31), and a charging hopper (36) is fixedly mounted on the upper end of the gate valve (35).

4. A conveying device for calcining coal powder according to claim 1, characterized in that: The lower end of the support frame (1) is in contact with the ground, the lower end of the receiving tube (11) is a conical structure, the drive motor (13) is fixedly connected to the receiving tube (11) via the connecting frame (12), and the axis of the drive motor (13) and the axis of the receiving tube (11) are in the same straight line.

5. A conveying device for calcining coal powder according to claim 1, characterized in that: The connecting shaft (14) is fixedly connected to the rotating shaft of the driving motor (13); the stirring rod (15) is annularly mounted on the outside of the connecting shaft (14) with the axis of the connecting shaft (14) as the reference, and the end of the stirring rod (15) is embedded in the inner wall of the receiving tube (11).

6. A conveying device for calcining coal powder according to claim 1, characterized in that: The delivery pipe (21) is connected to the receiving pipe (11) through the connecting pipe (2); the rotation angle of the inclined pipe (24) in the vertical axis is 45 degrees, and the rotation angle in the front and rear horizontal axis is 45 degrees; the inclined pipe (24) is installed on the front side of the inclined pipe (24) at a clockwise angle of 90 degrees with the center of the transfer pipe (23) as the reference.

7. A conveying device for calcining coal powder according to claim 2, characterized in that: The bent pipe (25) is installed in a "cross" shape at the upper, lower, left and right four outlets of the five-way pipe (26) with the center of the five-way pipe (26) as the reference. The five-way pipe (26) is connected to the fan (27), and a receiving frame (28) is fixedly installed below the fan (27).

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