Combustion-supporting device for pulverized coal combustion

Abstract

The utility model relates to the technical field of cement production, in particular to a pulverized coal combustion supporting device which comprises a conveying pipe, a combustion improver box and a mixing pipe, a discharging pipe is installed at the lower end of the combustion improver box, a rotating shaft is rotatably installed in the discharging pipe, material guiding plates distributed in an array mode are installed on the rotating shaft, and the mixing pipe is connected with the conveying pipe. The mixing pipe is installed at the tail end of the conveying pipe and communicated with the conveying pipe, a first rotating shaft, a second rotating shaft and a third rotating shaft which are distributed at equal intervals are rotatably installed in the mixing pipe, stirring rods are installed on the first rotating shaft, the second rotating shaft and the third rotating shaft, a discharging pipe is installed at the tail end of the mixing pipe and communicated with the mixing pipe, and the discharging pipe is connected with the conveying pipe. And electric heating pipes which are distributed at equal intervals are arranged on the outer surface of the discharging pipe. The pulverized coal combustion-supporting device has the advantages that the combustion-supporting agent can be added into pulverized coal, the pulverized coal and the combustion-supporting agent can be mixed, and air and the pulverized coal can be heated, so that combustion-supporting is carried out on the pulverized coal, and the combustion effect of the pulverized coal is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, in particular to a pulverized coal combustion and combustion-supporting device. Background Art

[0002] Pulverized coal is a crucial fuel in cement production, and its use and management are crucial for ensuring production safety, improving combustion efficiency, and reducing costs. Pulverized coal is a finely ground fuel obtained by grinding coal. In cement production, pulverized coal is primarily used to provide the necessary heat for clinker combustion, promoting the chemical reaction of raw materials at high temperatures to form clinker.

[0003] In cement production, coal powder is transported into the combustion chamber by wind, which not only provides fuel but also oxygen. However, there will be a certain amount of moisture in the coal powder, and the low temperature of the incoming air may easily lead to incomplete combustion of the coal powder, resulting in waste of coal powder and the inability to guarantee the combustion temperature. Therefore, the utility model proposes a coal powder combustion and combustion-supporting device. Utility Model Content

[0004] The purpose of the utility model is to provide a coal powder combustion and combustion-supporting device, which has the advantages of being able to add a combustion-supporting agent to the coal powder, mix the coal powder and the combustion-supporting agent, and heat the air and the coal powder, thereby supporting the combustion of the coal powder and ensuring the combustion effect of the coal powder, thereby solving the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal powder combustion and combustion-supporting device, comprising a conveying pipe, an combustion-supporting agent box and a mixing pipe, the upper end of the conveying pipe is provided with a coal powder inlet pipe, the lower end of the combustion-supporting agent box is installed with a discharge pipe, the discharge pipe is connected to the conveying pipe, a rotating shaft is rotatably installed in the discharge pipe, and a guide plate distributed in an array is installed on the rotating shaft, the mixing pipe is installed at the end of the conveying pipe, and the mixing pipe is connected to the conveying pipe, a first rotating shaft, a second rotating shaft and a third rotating shaft equidistantly distributed are rotatably installed in the mixing pipe, and stirring rods are installed on the first rotating shaft, the second rotating shaft and the third rotating shaft, a discharge pipe is installed at the end of the mixing pipe, the discharge pipe is connected to the mixing pipe, and the outer surface of the discharge pipe is provided with equidistantly distributed electric heating pipes.

[0006] When using a coal powder combustion and combustion-supporting device of the utility model, the end of the discharge pipe is connected to the coal injection gun, and the combustion-supporting agent is added to the combustion-supporting agent box through the feed pipe. The first driving device can rotate the rotating shaft, and the combustion-supporting agent can be discharged from the discharge pipe into the conveying pipe under the action of the guide plate. The coal powder is added to the conveying pipe from the coal powder entry pipe, and air is supplied to the conveying pipe through an external combustion-supporting fan. Under the action of the wind, the coal powder and the combustion-supporting agent can be transported. The first rotating shaft, the second rotating shaft and the third rotating shaft can be rotated by the second driving device. When the coal powder and the combustion-supporting agent pass through the mixing pipe, they can be stirred and mixed by the stirring rod. The mixed coal powder and combustion-supporting agent can enter the discharge pipe, and the material and air in the discharge pipe can be heated by the electric heating pipe. After heating, they enter the coal injection gun and are sprayed into the combustion chamber.

[0007] Preferably, a feed pipe is provided at the upper end of the combustion-supporting agent box, and a threaded cover is threadedly mounted on the feed pipe. The threaded cover can close the feed pipe.

[0008] Preferably, a first driving device is installed at the side end of the discharge pipe, and the main shaft of the first driving device is connected to the axis of the rotating shaft. The first driving device can rotate the rotating shaft when it is in operation.

[0009] Preferably, the first rotating shaft extending out of the mixing tube is equipped with a first driving pulley, the second rotating shaft extending out of the mixing tube is equipped with a first driven pulley and a second driving pulley, and a transmission belt is provided between the first driving pulley and the first driven pulley.

[0010] Preferably, the third rotating shaft extending out of the mixing tube is provided with a second driven pulley, and a transmission belt is provided between the second driving pulley and the second driven pulley.

[0011] Preferably, a second drive device is installed at the front end of the mixing tube, and the main shaft of the second drive device is connected to the axis of the first rotating shaft. When the second drive device is operated, it can rotate the first rotating shaft, thereby rotating the first driving pulley, which can then drive the first driven pulley to rotate via a transmission belt, and then the second driving pulley can drive the second driven pulley to rotate via a transmission belt, thereby causing the second rotating shaft and the third rotating shaft to rotate synchronously with the first rotating shaft.

[0012] Preferably, a heat-insulating pipe is installed on the outside of the discharge pipe, and the electric heating pipe is located inside the heat-insulating pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: a combustion aid can be added to the coal powder, and the coal powder and the combustion aid can be mixed when passing through the mixing tube. After mixing, the air and the coal powder can also be heated, so that the coal powder and the air can be dried and preheated, the temperature of the coal powder and the air can be increased, the coal powder can be fully burned, and the waste of coal powder can be prevented, thereby assisting the combustion of the coal powder and ensuring the combustion effect of the coal powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0016] Figure 3 This is a rear view structural diagram of the mixing tube of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the feed pipe of the utility model;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the feed pipe of the present invention.

[0019] The reference numerals and names in the figures are as follows:

[0020] 101. Conveying pipe; 102. Pulverized coal inlet pipe; 103. Combustion-supporting agent box; 104. Feeding pipe; 105. Discharging pipe; 106. First driving device; 107. Rotating shaft; 108. Guide plate; 201. Mixing tube; 202. Second driving device; 203. First rotating shaft; 204. Second rotating shaft; 205. Third rotating shaft; 206. Stirring rod; 207. First driving pulley; 208. First driven pulley; 209. Second driving pulley; 210. Second driven pulley; 211. Transmission belt; 301. Discharging pipe; 302. Thermal insulation pipe; 303. Electric heating pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example

[0023] See also Figures 1 to 5The utility model provides an embodiment: a pulverized coal combustion and combustion-supporting device, comprising: a delivery pipe 101, an oxidant box 103 and a mixing pipe 201, the upper end of the delivery pipe 101 is provided with a pulverized coal inlet pipe 102, the lower end of the oxidant box 103 is provided with a discharge pipe 105, the discharge pipe 105 is connected to the delivery pipe 101, a rotating shaft 107 is rotatably installed in the discharge pipe 105, and the rotating shaft 107 is provided with guide plates 108 distributed in an array, and the setting of the guide plates 108 can control the amount of oxidant added, so The mixing tube 201 is installed at the end of the conveying tube 101, and the mixing tube 201 is connected to the conveying tube 101. The first rotating shaft 203, the second rotating shaft 204 and the third rotating shaft 205 that are equidistantly distributed are rotatably installed in the mixing tube 201. The first rotating shaft 203, the second rotating shaft 204 and the third rotating shaft 205 are all installed with stirring rods 206. The end of the mixing tube 201 is installed with a discharge pipe 301, which is connected to the mixing tube 201, and the outer surface of the discharge pipe 301 is provided with equidistantly distributed electric heating tubes 303.

[0024] In this embodiment, the end of the discharge pipe 301 is connected to the coal injection gun, and the combustion-supporting agent is added to the combustion-supporting agent box 103 through the feed pipe 104. The first driving device 106 can be used to rotate the rotating shaft 107. Under the action of the guide plate 108, the combustion-supporting agent can be discharged from the discharge pipe 105 to the conveying pipe 101, and the coal powder is added to the conveying pipe 101 from the coal powder entry pipe 102. The conveying pipe 101 is blown with air by an external combustion-supporting fan. Under the action of the wind, the coal powder and the combustion-supporting agent can be transported. The first rotating shaft 203, the second rotating shaft 204 and the third rotating shaft 205 can be rotated by the second driving device 202. When the coal powder and the combustion-supporting agent pass through the mixing tube 201, they can be stirred and mixed by the stirring rod 206. The mixed coal powder and the combustion-supporting agent can enter the discharge pipe 301. The electric heating tube 303 can be used to heat the material and air in the discharge pipe 301. After heating, they enter the coal injection gun and are sprayed into the combustion chamber.

[0025] Furthermore, a feed pipe 104 is provided at the upper end of the combustion-supporting agent box 103 , and a threaded cover is threadedly mounted on the feed pipe 104 .

[0026] Furthermore, a first driving device 106 is installed at the side end of the discharge pipe 105 , and the main shaft of the first driving device 106 is connected to the axis of the rotating shaft 107 .

[0027] Furthermore, the first rotating shaft 203 extending out of the mixing tube 201 is installed with a first driving pulley 207, the second rotating shaft 204 extending out of the mixing tube 201 is installed with a first driven pulley 208 and a second driving pulley 209, and a transmission belt 211 is provided between the first driving pulley 207 and the first driven pulley 208.

[0028] Furthermore, the third rotating shaft 205 extending out of the mixing tube 201 is installed with a second driven pulley 210 , and a transmission belt 211 is provided between the second driving pulley 209 and the second driven pulley 210 .

[0029] Furthermore, a second driving device 202 is installed at the front end of the mixing tube 201 , and the main shaft of the second driving device 202 is connected to the axis of the first rotating shaft 203 .

[0030] Furthermore, a heat-insulating pipe 302 is installed on the outside of the discharge pipe 301 , and the electric heating pipe 303 is located inside the heat-insulating pipe 302 .

[0031] The driving device and the electric heating tube 303 in the present invention are well-known devices, and their working principles and circuit connections are well known to technicians in this field. They are all conventional means or common knowledge. The present invention only utilizes their functions and does not improve their structures. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A pulverized coal combustion and combustion-supporting device, comprising a delivery pipe (101), an oxidant tank (103) and a mixing pipe (201), characterized in that: The upper end of the delivery pipe (101) is provided with a pulverized coal inlet pipe (102), the lower end of the combustion-supporting agent box (103) is provided with a discharge pipe (105), the discharge pipe (105) is connected to the delivery pipe (101), a rotating shaft (107) is rotatably installed in the discharge pipe (105), and guide plates (108) distributed in an array are installed on the rotating shaft (107), the mixing pipe (201) is installed at the end of the delivery pipe (101), and the mixing pipe (201) is communicated with the delivery pipe (101). A first rotating shaft (203), a second rotating shaft (204) and a third rotating shaft (205) which are equidistantly distributed are rotatably installed in the mixing tube (201), and stirring rods (206) are installed on the first rotating shaft (203), the second rotating shaft (204) and the third rotating shaft (205). A discharge pipe (301) is installed at the end of the mixing tube (201), and the discharge pipe (301) is connected to the mixing tube (201), and the outer surface of the discharge pipe (301) is provided with electric heating pipes (303) which are equidistantly distributed.

2. A pulverized coal combustion and combustion-supporting device according to claim 1, characterized in that: A feed pipe (104) is provided at the upper end of the combustion-supporting agent box (103), and a threaded cover is threadedly mounted on the feed pipe (104).

3. A pulverized coal combustion and combustion-supporting device according to claim 1, characterized in that: A first driving device (106) is installed at the side end of the discharge pipe (105), and the main shaft of the first driving device (106) is connected to the axis of the rotating shaft (107).

4. A pulverized coal combustion and combustion-supporting device according to claim 1, characterized in that: The first rotating shaft (203) extends out of the mixing tube (201) and is installed with a first driving pulley (207); the second rotating shaft (204) extends out of the mixing tube (201) and is installed with a first driven pulley (208) and a second driving pulley (209); a transmission belt (211) is provided between the first driving pulley (207) and the first driven pulley (208).

5. A pulverized coal combustion and combustion-supporting device according to claim 4, characterized in that: The third rotating shaft (205) extends out of the mixing tube (201) and is installed with a second driven pulley (210), and a transmission belt (211) is provided between the second driving pulley (209) and the second driven pulley (210).

6. The pulverized coal combustion and combustion-supporting device according to claim 1, characterized in that: A second driving device (202) is installed at the front end of the mixing tube (201), and the main shaft of the second driving device (202) is connected to the axis of the first rotating shaft (203).

7. The pulverized coal combustion and combustion-supporting device according to claim 1, characterized in that: A heat-insulating pipe (302) is installed on the outside of the discharge pipe (301), and the electric heating pipe (303) is located inside the heat-insulating pipe (302).

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