Efficient coal injection duct structure of decomposing furnace

Abstract

The utility model discloses an efficient coal injection duct structure of a decomposing furnace, which is applied to the technical field of decomposing furnaces and is characterized in that when a filter screen needs to be replaced, the filter screen is moved to drive a connecting block to move, an arc-shaped clamping groove extrudes an arc-shaped clamping block, and the arc-shaped clamping block is extruded to enable a fixed block to drive a spring and a guide rod to move; the arc-shaped clamping block retracts into the pipe body, the filter screen continues to be moved to enable the connecting block to be separated from the connecting groove, and convenience and rapidness are achieved. After the pulverized coal enters the pipe body, the explosion-proof motor on the fixing rod is started, and the mounting disc drives the crushing shaft to rotate, so that the blocky pulverized coal can be crushed, and the situation that the combustion efficiency is affected due to blockage of the pulverized coal is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of decomposition furnace technology, and specifically relates to a high-efficiency coal injection pipe structure for a decomposition furnace. Background Technology

[0002] Pulverized coal injection pipes are widely used and are very important in rotary kiln equipment. They are mainly used to feed coal and air to the kiln head. Their functions include reducing energy consumption, increasing calcination output, extending the service life of the rotary kiln equipment, greatly increasing the operating speed of the equipment, reducing harmful substances, and increasing output.

[0003] Currently, Chinese utility model patent CN216668279U discloses a kiln head pulverized coal injection pipe, which relates to the field of pulverized coal injection pipe technology. Its beneficial effects are: by setting up a filter screen and an air inlet pipe, it can filter out larger pulverized coal particles in the pulverized coal, thus avoiding the effect of larger pulverized coal particles entering the kiln head and burning incompletely. After the filter screen filters out the larger pulverized coal particles, the air inlet pipe introduces high-pressure gas to blow off the large pulverized coal particles adhering to the surface of the filter screen, which then fall into the collection box and are discharged through the slag discharge valve.

[0004] While the aforementioned technology facilitates the filtration of pulverized coal through a filter screen, the filter screen is installed inside the pipeline, making it inconvenient to disassemble if damaged later. Furthermore, it is difficult to break up some lumpy pulverized coal, which can easily cause pulverized coal blockage and affect combustion efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a high-efficiency coal injection pipe structure for a decomposition furnace, which has the advantages of facilitating filter replacement and crushing lumpy coal powder.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-efficiency pulverized coal injection pipe structure for a decomposition furnace, comprising a pipe body, an electromagnetic valve disposed on the outer side of the pipe body, a first diversion pipe and a second diversion pipe respectively connected to the outer side of the pipe body, a filter screen disposed inside the bottom end of the pipe body, a connecting groove opened on one side of the inner wall of the bottom end of the pipe body, a connecting block for use with the connecting groove fixedly connected to one side of the filter screen, a positioning mechanism disposed on the other side of the inner wall of the bottom end of the pipe body, a fixing rod disposed above the filter screen, one side of the fixing rod being fixedly connected to the inner wall of the pipe body, an explosion-proof motor disposed at the top of the fixing rod, an installation plate fixedly connected to the output end of the explosion-proof motor, a crushing shaft fixedly connected to the outer side of the installation plate, and a fixing screw threadedly connected to the inner wall of the installation plate.

[0007] Using the above technical solution: When the filter screen needs to be replaced, moving the filter screen moves the connecting block. At this time, the arc-shaped groove squeezes the arc-shaped locking block. The arc-shaped locking block, under pressure, causes the fixing block to move, driving the spring and guide rod. The arc-shaped locking block retracts into the inside of the pipe body. Continuing to move the filter screen will disengage the connecting block from the connecting groove, which is convenient and quick. After the coal dust enters the pipe body, the explosion-proof motor on the fixing rod is started, causing the mounting plate to drive the crushing shaft to rotate, thereby crushing the lumpy coal dust and preventing coal dust blockage, which would affect combustion efficiency.

[0008] The present invention is further configured such that the pipe body, the first diversion pipe, and the second diversion pipe are integrally formed, and the three pipes have the same diameter.

[0009] The above technical solution can ensure the uniform distribution of pulverized coal and efficient combustion in the furnace.

[0010] The present invention is further configured such that one end of the fixing screw is threadedly connected to the output end of the explosion-proof motor.

[0011] The above technical solution facilitates the disassembly and replacement of the crusher shaft.

[0012] The present invention is further configured such that the positioning mechanism includes an arc-shaped groove formed on the inner wall of the connecting block, an arc-shaped locking block that cooperates with the arc-shaped groove is slidably connected to the inner wall of the tube, and a fixing block is fixedly connected to one side of the arc-shaped locking block.

[0013] The above technical solution facilitates the installation of the filter screen.

[0014] The present invention is further configured such that the positioning mechanism includes a spring fixed to one side of the fixing block, and one end of the spring is fixedly connected to the inner wall of the tube.

[0015] The above technical solution enables the arc-shaped card block to automatically reset.

[0016] The present invention is further configured such that a guide rod is fixedly connected to one side of the fixing block, a guide groove is provided on the inner wall of the tube for use with the guide rod, and the spring is located on the outside of the guide rod.

[0017] The above technical solution facilitates the stable movement of the arc-shaped locking block.

[0018] The present invention is further configured such that a connecting plate is fixedly connected to the inner wall of the top end of the tube, a connecting shaft is rotatably connected to the bottom of the connecting plate, a flow divider is fixedly connected to the bottom of the connecting shaft, and a through hole is provided on the inner wall of the flow divider.

[0019] The above technical solution ensures that the powder sprayed from the pipe outlet remains uniform.

[0020] The present invention is further configured such that the diverter plate is tapered.

[0021] The above technical solution can reduce the impact of pulverized coal on the diversion plate.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. When the filter needs to be replaced, move the filter to move the connecting block. At this time, the arc-shaped groove squeezes the arc-shaped block. The arc-shaped block is squeezed, which causes the fixed block to move the spring and guide rod. The arc-shaped block retracts into the inside of the tube. Continue to move the filter to disengage the connecting block from the connecting groove. It is convenient and quick.

[0024] 2: After the coal powder enters the pipe, the explosion-proof motor on the fixed rod is started, which causes the installation plate to drive the crushing shaft to rotate, thereby crushing the lumpy coal powder and preventing coal powder blockage, which would affect the combustion efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the tube body of this utility model;

[0027] Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0028] Reference numerals in the attached drawings: 1. Pipe body; 2. Solenoid valve; 3. First diverter pipe; 4. Second diverter pipe; 5. Filter screen; 6. Connecting groove; 7. Connecting block; 8. Arc-shaped slot; 9. Arc-shaped locking block; 10. Fixing block; 11. Spring; 12. Guide rod; 13. Fixing rod; 14. Explosion-proof motor; 15. Mounting plate; 16. Crushing shaft; 17. Fixing screw; 18. Connecting plate; 19. Connecting shaft; 20. Diverter plate; 21. Through hole. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1:

[0031] refer to Figure 1 , Figure 2 and Figure 3 A high-efficiency pulverized coal injection pipe structure for a decomposition furnace includes a pipe body 1, an electromagnetic valve 2 installed on the outer side of the pipe body 1, a first diversion pipe 3 and a second diversion pipe 4 connected to the outer side of the pipe body 1, a filter screen 5 installed inside the bottom end of the pipe body 1, a connecting groove 6 opened on one side of the inner wall of the bottom end of the pipe body 1, a connecting block 7 that cooperates with the connecting groove 6 is fixedly connected to one side of the filter screen 5, and a positioning mechanism is installed on the other side of the inner wall of the bottom end of the pipe body 1.

[0032] refer to Figure 1 and Figure 2 The pipe body 1, the first diversion pipe 3, and the second diversion pipe 4 are integrally formed, and the three pipes have the same diameter. The pulverized coal is sprayed out through the pipe body 1, the first diversion pipe 3, and the second diversion pipe 4 respectively, with a wider spraying range, ensuring uniform distribution and efficient combustion of pulverized coal in the furnace.

[0033] refer to Figure 2 One end of the fixing screw 17 is threadedly connected to the output end of the explosion-proof motor 14.

[0034] refer to Figure 2 and Figure 3 The positioning mechanism includes an arc-shaped groove 8 formed on the inner wall of the connecting block 7, an arc-shaped locking block 9 that slidably connects to the inner wall of the tube body 1 and works in conjunction with the arc-shaped groove 8, and a fixing block 10 fixedly connects to one side of the arc-shaped locking block 9.

[0035] refer to Figure 2 and Figure 3 The positioning mechanism also includes a spring 11 fixed to one side of the fixing block 10, with one end of the spring 11 fixedly connected to the inner wall of the tube body 1.

[0036] refer to Figure 2 and Figure 3 A guide rod 12 is fixedly connected to one side of the fixed block 10. A guide groove is provided on the inner wall of the tube body 1 to cooperate with the guide rod 12. The spring 11 is located on the outside of the guide rod 12. By sliding the guide rod 12 in the guide groove, the arc-shaped block 9 can remain stable when moving.

[0037] Brief description of the usage process: When the filter screen 5 needs to be replaced, move the filter screen 5 to move the connecting block 7. At this time, the arc-shaped groove 8 squeezes the arc-shaped block 9. The arc-shaped block 9 is squeezed, which causes the fixing block 10 to move the spring 11 and the guide rod 12. The arc-shaped block 9 retracts into the inside of the tube body 1. Continue to move the filter screen 5 to make the connecting block 7 disengage from the connecting groove 6. It is convenient and quick. During installation, reverse the operation to make the connecting block 7 compress the arc-shaped block 9 and make it retract into the tube body 1. When the connecting block 7 is fully inserted into the connecting groove 6, the arc-shaped block 9 and the arc-shaped groove 8 are horizontal. At this time, the rebound force of the spring 11 can make the arc-shaped block 9 insert into the arc-shaped groove 8, thus positioning the filter screen 5.

[0038] Example 2:

[0039] refer to Figure 1 and Figure 2A high-efficiency pulverized coal injection pipe structure for a decomposition furnace includes a pipe body 1. A solenoid valve 2 is installed on the outer side of the pipe body 1. A first diversion pipe 3 and a second diversion pipe 4 are respectively connected to the outer side of the pipe body 1. A filter screen 5 is installed inside the bottom end of the pipe body 1. A fixing rod 13 is installed above the filter screen 5. One side of the fixing rod 13 is fixedly connected to the inner wall of the pipe body 1. An explosion-proof motor 14 is installed at the top of the fixing rod 13. An installation plate 15 is fixedly connected to the output end of the explosion-proof motor 14. A crushing shaft 16 is fixedly connected to the outer side of the installation plate 15. A fixing screw 17 is threadedly connected to the inner wall of the installation plate 15.

[0040] refer to Figure 1 and Figure 2 A connecting plate 18 is fixedly connected to the inner wall of the top end of the pipe body 1. A connecting shaft 19 is rotatably connected to the bottom of the connecting plate 18. A diverter plate 20 is fixedly connected to the bottom of the connecting shaft 19. A through hole 21 is opened on the inner wall of the diverter plate 20.

[0041] refer to Figure 2 The diversion plate 20 is set in a cone shape.

[0042] Brief description of the usage process: After the coal powder enters the pipe body 1, the explosion-proof motor 14 on the fixing rod 13 is started, which causes the mounting plate 15 to drive the crushing shaft 16 to rotate, thereby crushing the lumpy coal powder and avoiding coal powder blockage, which affects the combustion efficiency. The crushing shaft 16 can be easily disassembled and replaced by fixing screws 17. Under the action of centrifugal force, the coal powder will cause the diversion plate 20 to drive the connecting shaft 19 to rotate through the outlet at the top of the pipe body 1. Some of the coal powder is sprayed out through the gap between the diversion plate 20 and the pipe body 1, and the other part is sprayed out through the through hole 21, which can make the sprayed coal powder uniform and help combustion.

[0043] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A high-efficiency pulverized coal injection pipe structure for a decomposition furnace, comprising a pipe body (1), characterized in that: A solenoid valve (2) is provided on the outside of the pipe body (1). A first diversion pipe (3) and a second diversion pipe (4) are respectively connected to the outside of the pipe body (1). A filter screen (5) is provided inside the bottom end of the pipe body (1). A connecting groove (6) is opened on one side of the inner wall of the bottom end of the pipe body (1). A connecting block (7) that works with the connecting groove (6) is fixedly connected to one side of the filter screen (5). A positioning mechanism is provided on the other side of the inner wall of the bottom end of the pipe body (1). A fixing rod (13) is provided above the filter screen (5). One side of the fixing rod (13) is fixedly connected to the inner wall of the pipe body (1). An explosion-proof motor (14) is provided at the top of the fixing rod (13). An installation plate (15) is fixedly connected to the output end of the explosion-proof motor (14). A crushing shaft (16) is fixedly connected to the outside of the installation plate (15). A fixing screw (17) is threadedly connected to the inner wall of the installation plate (15).

2. The high-efficiency pulverized coal injection pipe structure for a decomposition furnace according to claim 1, characterized in that: The tube body (1) is integrally formed with the first branch pipe (3) and the second branch pipe (4), and the three have the same diameter.

3. The high-efficiency pulverized coal injection pipe structure for a decomposition furnace according to claim 1, characterized in that: One end of the fixing screw (17) is threadedly connected to the output end of the explosion-proof motor (14).

4. The high-efficiency pulverized coal injection pipe structure for a decomposition furnace according to claim 1, characterized in that: The positioning mechanism includes an arc-shaped groove (8) formed on the inner wall of the connecting block (7), and an arc-shaped block (9) that cooperates with the arc-shaped groove (8) is slidably connected to the inner wall of the tube body (1). A fixing block (10) is fixedly connected to one side of the arc-shaped block (9).

5. The high-efficiency pulverized coal injection pipe structure for a preheater according to claim 4, characterized in that: The positioning mechanism also includes a spring (11) fixed to one side of the fixing block (10), and one end of the spring (11) is fixedly connected to the inner wall of the tube (1).

6. The high-efficiency pulverized coal injection pipe structure for a precalciner according to claim 5, characterized in that: A guide rod (12) is fixedly connected to one side of the fixed block (10), and a guide groove is provided on the inner wall of the tube (1) to cooperate with the guide rod (12). The spring (11) is located on the outside of the guide rod (12).

7. The high-efficiency pulverized coal injection pipe structure for a precalciner according to claim 1, characterized in that: A connecting plate (18) is fixedly connected to the inner wall of the top end of the tube (1), and a connecting shaft (19) is rotatably connected to the bottom of the connecting plate (18). A flow divider (20) is fixedly connected to the bottom of the connecting shaft (19), and a through hole (21) is opened on the inner wall of the flow divider (20).

8. The high-efficiency pulverized coal injection pipe structure for a decomposition furnace according to claim 7, characterized in that: The distribution plate (20) is cone-shaped.

Images