Vertical rich-thin direct-flow pulverized coal combustion device

Abstract

The utility model relates to the technical field of pulverized coal combustion, in particular to a vertical thick-thin direct-flow pulverized coal combustion device which comprises a bottom plate placed on the ground, a combustion furnace is arranged at the top end of the bottom plate, a breast board is fixedly connected to the inner wall of the combustion furnace, and a smoke exhaust pipe is connected to the top end of the combustion furnace in a penetrating mode. The top end of the bottom plate is fixedly connected with a supporting plate, the top end of the supporting plate is fixedly connected with a driving motor, the driving motor comprises a discharging port through a feeding structure, the top end of the supporting plate is fixedly connected with an air blower, the air blower is connected with a double-end air pipe through an air blowing structure, and the bottom end of the combustion furnace is fixedly connected with a supporting column. According to the utility model, the feeding structure can be driven to operate through the driving motor, fuels such as pulverized coal and the like are uniformly put into the combustion furnace, and the pulverized coal does not need to be manually added, so that the labor efficiency is improved, and the working efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal powder combustion, in particular to a vertical concentrated-thin direct current coal powder combustion device. Background Art

[0002] The vertical thick-thin combustion method is to separate the primary coal powder airflow into two streams, and then divide the original primary air nozzle into two upper and lower nozzles separated by a certain distance in the vertical direction, thereby forming an upper and lower thick-thin combustion method. Experimental studies have shown that this thick-thin combustion method can reduce NOx emissions by about 30%.

[0003] A vertical concentrated and diluted direct current coal powder combustion device with publication number CN203628645U comprises a baffle, a blunt body, a concentrated primary air nozzle, a diluted primary air nozzle, a deflection mound and a concentration mound, wherein the baffle is arranged horizontally and separates the concentrated and diluted coal powder airflows in the furnace into two parts, the upper part is a concentrated primary air channel, and the lower part is a diluted primary air channel, the deflection mound and the concentration mound are arranged on the diluted primary air nozzle and the diluted primary air channel respectively, and the concentrated primary air nozzle and the diluted primary air nozzle are arranged on one side and the lower part of the concentrated primary air channel respectively It is one side of the light primary air channel, and the concentrated primary air nozzle and the light primary air nozzle are made into one body, the blunt body is arranged between the concentrated primary air nozzle and the light primary air nozzle, the concentrated coal powder airflow enters the furnace through the upper concentrated primary air channel and the concentrated primary air nozzle, the light coal powder airflow enters the furnace through the lower light primary air channel and the light primary air nozzle, the angle between the center line of the concentrated primary air jet entering the furnace and the projection line of the center line of the light primary air jet on the horizontal plane is α, the center line of the light primary air is deflected 4-12° to the back-fire side of the center line of the concentrated primary air.

[0004] The above patent document has the advantage of preventing high-concentration coal powder airflow from brushing the wall and causing slagging and high-temperature corrosion of the water-cooled wall. On the other hand, it can also form graded combustion with the light coal powder airflow in the cross section, that is, forming a combustion form of wind-enclosed powder with concentrated inside and light outside while vertically thick and thin, further reducing the generation of NOx. However, the method of adding coal powder is manual using a shovel tool, which has a high labor rate and low work efficiency. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the existing manual use of shovel tools, such as high labor rate and low work efficiency, and proposes a vertical thick-thin direct current coal powder combustion device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A vertical concentrated-thin direct current pulverized coal combustion device comprises a base plate placed on the ground, a combustion furnace is arranged on the top of the base plate, a guardrail is fixedly connected to the inner wall of the combustion furnace, a smoke exhaust pipe is connected through the top of the combustion furnace, a support plate is fixedly connected to the top of the base plate, a drive motor is fixedly connected to the top of the support plate, the drive motor includes a discharge port through a feeding structure, a blower is fixedly connected to the top of the support plate, the blower is connected to a double-headed air duct through a blowing structure, and a support is fixedly connected to the bottom end of the combustion furnace.

[0008] Preferably, the feeding structure includes a feeding box, a feeding hopper, a rotating shaft, and spiral blades. The bottom end of the feeding box is fixedly connected to the support, the feeding hopper is through-connected to the top end of the feeding box, the rotating shaft is rotatably connected to the inner wall of the feeding box, and the spiral blades are fixedly connected to the rotating shaft.

[0009] Preferably, the output shaft of the driving motor penetrates the outer wall of the feeding box and is fixedly connected to the rotating shaft, one end of the discharge port is connected to the feeding box, and the other end of the discharge port is connected to the outer wall of the combustion furnace.

[0010] Preferably, the blowing structure includes a first pulley, a belt, a second pulley, and an air pipe, the first pulley is fixedly connected to the drive shaft of the blower, the second pulley is fixedly connected to the output end of the driving motor, the first pulley and the second pulley are connected by a belt, and the air pipe is fixedly connected to the blower.

[0011] Preferably, the air pipe is connected to the double-ended air duct.

[0012] Preferably, an ash outlet is provided at the bottom end of the combustion furnace.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When the utility model is in use, the feeding structure can be driven by the driving motor to evenly put the coal powder and other fuels into the combustion furnace, without relying on manual addition of coal powder, thereby improving labor efficiency and work efficiency.

[0015] 2. When the utility model is in use, the blower can be driven by the driving motor to input air to the upper and lower parts of the combustion furnace, thereby making the structure of the device simpler and enhancing the effect of the vertical thick and thin combustion method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a vertical concentrated-diluted direct current pulverized coal combustion device proposed by the utility model;

[0017] Figure 2It is a three-dimensional structural diagram of a feeding structure of a vertical concentrated-light direct current pulverized coal combustion device proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the internal three-dimensional structure of a combustion furnace of a vertical concentrated-light direct current pulverized coal combustion device proposed by the utility model.

[0019] In the figure: 1 bottom plate, 2 combustion furnace, 3 guardrail, 4 smoke exhaust pipe, 5 support plate, 6 drive motor, 7 discharge port, 8 blower, 9 double-head air duct, 10 support, 11 feed box, 12 feed hopper, 13 rotating shaft, 14 spiral blade, 15 first pulley, 16 belt, 17 second pulley, 18 air pipe, 19 ash outlet. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-Figure 3 A vertical concentrated and diluted direct current pulverized coal combustion device comprises a base plate 1 placed on the ground, a combustion furnace 2 is arranged on the top of the base plate 1, a baffle 3 is fixedly connected to the inner wall of the combustion furnace 2, a smoke exhaust pipe 4 is connected through the top of the combustion furnace 2, a support plate 5 is fixedly connected to the top of the base plate 1, a drive motor 6 is fixedly connected to the top of the support plate 5, the drive motor 6 includes a discharge port 7 through a feeding structure, a blower 8 is fixedly connected to the top of the support plate 5, the blower 8 is connected to a double-headed air duct 9 through a blowing structure, and a support 10 is fixedly connected to the bottom end of the combustion furnace 2.

[0022] It should be noted that the specific models and specifications of the drive motor 6 and the blower 8 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it is not repeated here.

[0023] Furthermore, the feeding structure includes a feeding box 11, a feeding hopper 12, a rotating shaft 13, and a spiral blade 14. The bottom end of the feeding box 11 is fixedly connected to the support 10, the feeding hopper 12 is through-connected to the top of the feeding box 11, the rotating shaft 13 is rotatably connected to the inner wall of the feeding box 11, and the spiral blade 14 is fixedly connected to the rotating shaft 13.

[0024] A support column 10 is also provided at the bottom of the feeding box 11 to support the feeding box 11 .

[0025] Furthermore, the output shaft of the driving motor 6 penetrates the outer wall of the feeding box 11 and is fixedly connected to the rotating shaft 13 , one end of the discharge port 7 penetrates and connects with the feeding box 11 , and the other end of the discharge port 7 penetrates and connects with the outer wall of the combustion furnace 2 .

[0026] The discharge port 7 is arranged at the middle end of the outer wall of the feed box 11 , and the discharge port 7 on one side of the combustion furnace 2 is arranged above the guardrail 3 .

[0027] Furthermore, the blowing structure includes a first pulley 15, a belt 16, a second pulley 17, and an air pipe 18. The first pulley 15 is fixedly connected to the transmission shaft of the blower 8, the second pulley 17 is fixedly connected to the output end of the drive motor 6, the first pulley 15 and the second pulley 17 are connected through the belt 16, and the air pipe 18 is fixedly connected to the blower 8.

[0028] The blower 8 generates wind force through the power provided by the driving motor 6 , and the wind force flows into the double-ended air duct 9 through the air pipe 18 .

[0029] Furthermore, the air pipe 18 is connected to the double-ended air pipe 9 .

[0030] The upper part of the double-ended air duct 9 is arranged above the inner cavity of the combustion furnace 2 , and the lower part of the air duct is arranged below the inner baffle 3 of the combustion furnace 2 .

[0031] Furthermore, an ash outlet 19 is provided at the bottom end of the combustion furnace 2 .

[0032] The ash outlet 19 is arranged below the railing 3 .

[0033] Working principle: First, start the drive motor 6, which drives the rotating shaft 13 and the spiral blades 14 to rotate. The coal powder placed in the feed hopper 12 enters the combustion furnace 2 through the discharge port 7 under the push of the spiral blades 14. While the drive motor 6 is running, the drive motor 6 drives the second pulley 17 to rotate, and the second pulley 17 drives the belt 16 and the first pulley 15 to rotate. The first pulley 15 drives the blower 8 to generate wind force, and the wind force is blown into the combustion furnace 2 through the air pipe 18 and the double-headed air pipe 9, thereby improving labor efficiency, improving work efficiency, making the structure of the device simpler, and enhancing the effect of the vertical thick and thin combustion method.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vertical concentrated-dilute direct current pulverized coal combustion device, comprising a base plate (1) placed on the ground, characterized in that: A combustion furnace (2) is arranged at the top of the base plate (1), a baffle (3) is fixedly connected to the inner wall of the combustion furnace (2), a smoke exhaust pipe (4) is connected through the top of the combustion furnace (2), a support plate (5) is fixedly connected to the top of the base plate (1), a drive motor (6) is fixedly connected to the top of the support plate (5), the drive motor (6) includes a discharge port (7) through a feeding structure, a blower (8) is fixedly connected to the top of the support plate (5), the blower (8) is connected to a double-headed air duct (9) through a blowing structure, and a support (10) is fixedly connected to the bottom end of the combustion furnace (2).

2. A vertical concentrated-diluted direct current pulverized coal combustion device according to claim 1, characterized in that: The feeding structure comprises a feeding box (11), a feeding hopper (12), a rotating shaft (13), and a spiral blade (14); the bottom end of the feeding box (11) is fixedly connected to the support (10); the feeding hopper (12) is through-connected to the top end of the feeding box (11); the rotating shaft (13) is rotatably connected to the inner wall of the feeding box (11); and the spiral blade (14) is fixedly connected to the rotating shaft (13).

3. A vertical concentrated-diluted direct current pulverized coal combustion device according to claim 2, characterized in that: The output shaft of the driving motor (6) penetrates the outer wall of the feeding box (11) and is fixedly connected to the rotating shaft (13); one end of the discharge port (7) is connected to the feeding box (11); and the other end of the discharge port (7) is connected to the outer wall of the combustion furnace (2).

4. A vertical concentrated-diluted direct current pulverized coal combustion device according to claim 1, characterized in that: The blowing structure comprises a first pulley (15), a belt (16), a second pulley (17), and an air pipe (18); the first pulley (15) is fixedly connected to a transmission shaft of a blower (8); the second pulley (17) is fixedly connected to an output end of a driving motor (6); the first pulley (15) and the second pulley (17) are connected via a belt (16); and the air pipe (18) is fixedly connected to the blower (8).

5. A vertical concentrated-diluted direct current pulverized coal combustion device according to claim 4, characterized in that: The air pipe (18) is in continuous connection with the double-ended air pipe (9).

6. A vertical concentrated-diluted direct current pulverized coal combustion device according to claim 1, characterized in that: The bottom end of the combustion furnace (2) is provided with an ash outlet (19).

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