Cement kiln SCR denitrification high efficiency soot blowing system

Abstract

The present invention discloses a cement kiln SCR denitration high-efficiency sootblowing system, comprising an air compressor, a pressure regulating tank and a filter arranged in sequence on a main pipeline, a vertical pipe arranged at the end of the main pipeline, a plurality of branch pipes arranged on the vertical pipe, a solenoid valve, a shock wave generator and a sootblowing head arranged in sequence on the branch pipe, a boost valve arranged on the pipeline between the air compressor and the pressure regulating tank, a one-way valve arranged on the pipeline between the pressure regulating tank and the filter, and the sootblowing system further comprising a controller, which controls the actions of the air compressor, the pressure regulating tank, the solenoid valve, the shock wave generator, the boost valve and the sootblowing head by operating on the controller. The sootblowing system provided by the present invention can effectively improve the sootblowing efficiency and sootblowing effect, and can effectively prolong the service life.

Description

Technical Field

[0001] The invention relates to a cement kiln SCR denitration high-efficiency sootblowing system, belonging to the technical field of sootblowing systems. Background Art

[0002] At present, the selective catalytic reduction (SCR) denitrification technology is often used in the kiln treatment of the cement kiln industry. The selective catalytic reduction (SCR) denitrification technology is the denitrification technology with the highest denitrification efficiency and the most market prospects. It has become a domestic and even international industry for efficient control of NO X The first choice for emissions. As the core material of SCR denitrification technology, the catalyst has become a direct factor restricting the catalytic reaction. However, when flue gas containing high-concentration and high-viscosity dust passes through the catalyst, it is very easy to condense on its surface, forming bridges and blockages, thereby causing catalyst poisoning and greatly reducing the denitrification efficiency. In order to prevent the catalyst from accumulating dust and improve the denitrification efficiency, a soot blowing device needs to be installed above each layer of catalyst. However, the existing soot blowing device has a complex structure, and the soot blowing efficiency and effect are poor. Frequent soot blowing treatment of the kiln is required, which accelerates the aging of the system. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a cement kiln SCR denitrification high-efficiency sootblowing system, which can effectively improve the sootblowing efficiency and sootblowing effect, and can effectively extend the service life of the system.

[0004] The technical solution adopted by the present invention is:

[0005] The cement kiln SCR denitrification high-efficiency sootblowing system comprises an air compressor, a pressure regulating tank and a filter arranged in sequence on a main pipeline, a vertical pipe is arranged at the end of the main pipeline, a plurality of branch pipes are arranged on the vertical pipe, a solenoid valve, a shock wave generator and a sootblowing head are arranged in sequence on the branch pipe, the sootblowing head comprises a cylinder with a conical structure at the top, a partition is arranged in the cylinder, an electromagnet is fixedly arranged inside the bottom end of the cylinder, a spiral rail is arranged on the inner wall of the cylinder between the partition and the electromagnet, a magnet is also slidably arranged between the partition and the electromagnet, a sliding ball is fixedly arranged on the top of the magnet, and the bead body of the sliding ball is positioned In the spiral rail, a fixing rod is provided on the side of the magnet facing the partition and is inserted into and extends to the other side of the partition, a fixing plate is provided at the end of the fixing rod, an elastic member is sleeved on the fixing rod between the partition and the magnet, and a jet pipe is also provided on the side of the cylinder body facing the tapered end of the fixing plate, the jet pipe is mounted on the fixing plate through a plurality of connecting rods, and the jet pipe extends to the outside of the cylinder body at the tapered end and a plurality of jet holes are opened on the tube body at the end of the jet pipe, an air inlet port is provided between the fixing plate and the cylinder body at the tapered end and close to the fixing plate at the top of the cylinder body, and the air inlet port is connected to the shock wave generator pipeline.

[0006] Preferably, a boost valve is also provided on the pipeline between the air compressor and the pressure regulating tank.

[0007] Further preferably, a one-way valve is also provided on the pipeline between the pressure regulating tank and the filter.

[0008] Further preference also includes a controller, through which the actions of the air compressor, the pressure regulating tank, the solenoid valve, the shock wave generator, the electromagnet and the boost valve are controlled.

[0009] Further preferably, an air pressure sensor corresponding to the air inlet pipe opening is provided at the bottom of the cylinder.

[0010] Further preferably, a sealing block is provided inside the conical structure end of the cylinder.

[0011] Further preferably, the diameter of the fixing plate is larger than the diameter of the fixing rod.

[0012] Further preferably, the connection between the fixing rod and the partition is mechanically sealed.

[0013] Further preferably, a second elastic member is provided between the electromagnet and the magnet.

[0014] Further preferably, a heating coil is provided outside the pressure regulating tank, and a temperature sensor is provided inside the pressure regulating tank, and the temperature sensor transmits the detected temperature value to the controller for display.

[0015] The beneficial effects of the present invention are:

[0016] The compressed air is passed through the shock wave generator to generate shock waves, and the retractable and rotatable sootblowing head is used to blow soot on the pipes in the kiln, which can effectively remove the ash accumulation in the dead corners and the coke on the pipes, with low gas consumption and high safety performance. The system is a pure startup design with high working stability, which extends the service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural schematic diagram of a sootblower head;

[0019] Figure 3 It is a cross-sectional view of the curved rail end cylinder;

[0020] The main reference numerals in the figure have the following meanings:

[0021] 1. Main pipeline, 2. Air compressor, 3. Pressure regulating tank, 4. Filter, 5. Vertical pipe, 6. Branch pipe, 7. Solenoid valve, 8. Shock wave generator, 9. Soot blowing head, 10. Cylinder, 11. Partition, 12. Electromagnet, 13. Spiral rail, 14. Magnet, 15. Sliding ball, 16. Fixed rod, 17. Fixed plate, 18. Jet pipe, 19. Connecting rod, 20. Inlet pipe, 21. Boost valve, 22. Check valve, 23. Controller, 24. Air pressure sensor, 25. Sealing block, 26. Elastic part 1, 27. Elastic part 2, 28. Heating coil, 29. Temperature sensor. DETAILED DESCRIPTION

[0022] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-3 As shown: This embodiment is a cement kiln SCR denitrification high-efficiency sootblowing system, comprising an air compressor 2, a pressure regulating tank 3 and a filter 4 arranged in sequence on a main pipeline 1, a vertical pipe 5 is arranged at the end of the main pipeline 1, a plurality of branch pipes 6 are arranged on the vertical pipe 5, a solenoid valve 7, a shock wave generator 8 and a sootblowing head 9 are arranged in sequence on the branch pipe 6, the sootblowing head 9 comprises a cylinder 10 with a conical structure at the top, a partition 11 is arranged in the cylinder 10, an electromagnet 12 is fixedly arranged inside the bottom end of the cylinder 10, a spiral rail 13 is arranged on the inner wall of the cylinder 10 between the partition 11 and the electromagnet 12, a magnet 14 is also slidably arranged between the partition 11 and the electromagnet 12, the magnet 14 facing the electromagnet 12 side is the same as the magnetism generated by the electromagnet 12 facing the magnet 14 side after power is turned on, and a magnet 14 is also arranged on the cylinder 10 between the partition 11 and the electromagnet 12. A plurality of pressure relief holes are provided; a sliding ball 15 is fixedly provided on the top of the magnet 14, and the ball body of the sliding ball 15 is located in the spiral track 13; a fixing rod 16 is provided on the side of the magnet 14 facing the partition 11 and extending to the other side of the partition 11; a fixing plate 17 is provided at the end of the fixing rod 16; an elastic member 26 is sleeved on the fixing rod 16 between the partition 11 and the magnet 14; a jet pipe 18 is also provided on the side of the cylinder 10 facing the tapered end of the fixing plate 17; the jet pipe 18 is mounted on the fixing plate 17 through a plurality of connecting rods 19; the jet pipe 18 extends to the outside of the cylinder 10 at the tapered end and a plurality of jet holes are provided on the tube body at the end of the jet pipe 18; an air inlet port 20 is provided between the fixing plate 17 and the cylinder 10 at the tapered end and close to the fixing plate 17 at the top of the cylinder 10; the air inlet port 20 is connected to the pipeline of the shock wave generator 8.

[0024] See also Figure 1As shown, a boost valve 21 is also provided on the pipeline between the air compressor 2 and the pressure regulating tank 3, and a one-way valve 22 is also provided on the pipeline between the pressure regulating tank 3 and the filter 4. The system also includes a controller 23, and the air compressor 2, the pressure regulating tank 3, the solenoid valve 7, the shock wave generator 8, the electromagnet 12 and the boost valve 21 are controlled by operating the controller 23.

[0025] See also Figure 2 As shown, an air pressure sensor 24 corresponding to the air inlet port 20 is provided at the bottom of the cylinder 10 .

[0026] See also Figure 2 As shown, a sealing block 25 is arranged in the conical structure end of the cylinder 10 .

[0027] See also Figure 2 As shown, the diameter of the fixing disk 17 is larger than the diameter of the fixing rod 16 , and the connection between the fixing rod 16 and the partition plate 11 is mechanically sealed.

[0028] See also Figure 2 As shown, a second elastic member 27 is further provided between the electromagnet 12 and the magnet 14 ; in actual application, the elasticity of the second elastic member 27 is smaller than the elastic force of the first elastic member 26 .

[0029] See also Figure 2 As shown, a heating coil 28 is further provided outside the pressure regulating tank 3, and a temperature sensor 29 is further provided inside the pressure regulating tank 3. The temperature sensor 29 transmits the detected temperature value to the controller 23 for display.

[0030] In actual application of the present invention, after being compressed by the air compressor 2, the air is successively pressure-regulated by the boost valve 21 and the pressure regulating tank 3, and preheated by the heating coil 28 on the pressure regulating tank 3, and then passes through the one-way valve 22 and the filter 4 to enter each branch pipe 6, and generates a pulse airflow wave under the action of the shock wave generator 8 on the branch pipe 6, and then acts on the pipeline in the kiln through the jet hole on the jet pipe 18 of the soot blowing head 9; in actual operation, the soot blowing head 9 is fixed on the outer wall of the kiln, and the jet pipe 18 is rotatably connected with the kiln seal and extends into the kiln; after the pulse airflow wave blows the pipeline in the kiln for a certain period of time, the electromagnet 12 is energized through the controller 23, and the electromagnet 12 After power is turned on, the magnetism generated on the side facing the magnet 14 is the same as the magnetism on the side facing the electromagnet 12, so a repulsive force is generated, causing the magnet 14 to move toward the partition 11. Due to the existence of the spiral track 13, the sliding ball 15 on the top of the magnet 14 rotates along the spiral track 13, thereby driving the magnet 14 to rotate, and then driving the fixed rod 16 and the jet pipe 18 to rotate and move forward so that the pulse air flow wave sweeps the pipeline in the kiln; the magnetic size of the electromagnet 12 can be adjusted by changing the current passed into the electromagnet 12 through the controller 23, which can fully meet the production needs; when the jet pipe 18 needs to be recovered, the current passed into the electromagnet 12 is continuously reduced through the controller 23, and then the resilience of the elastic member 26 acts on the magnet 14, so that the magnet 14 drives the jet pipe 18 to rotate and retreat, so as to meet the soot blowing needs.

[0031] The above is only a preferred implementation of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. Cement kiln SCR denitrification high-efficiency soot blowing system, characterized by: The invention comprises an air compressor (2), a pressure regulating tank (3) and a filter (4) which are sequentially arranged on a main pipeline (1); a vertical pipe (5) is arranged at the end of the main pipeline (1); a plurality of branch pipes (6) are arranged on the vertical pipe (5); a solenoid valve (7), a shock wave generator (8) and a soot blowing head (9) are sequentially arranged on the branch pipe (6); the soot blowing head (9) comprises a cylinder (10) with a conical structure at the top; a partition (11) is arranged inside the cylinder (10); an electromagnet (12) is fixedly arranged inside the bottom end of the cylinder (10); a spiral track (13) is arranged on the inner wall of the cylinder (10) between the partition (11) and the electromagnet (12); a magnet (14) is also slidably arranged between the partition (11) and the electromagnet (12); a sliding ball (15) is fixedly arranged on the top of the magnet (14); and the ball body of the sliding ball (15) is located in the spiral track (13). A fixing rod (16) is provided on one side of the magnet (14) facing the partition (11) and is inserted into and extends to the other side of the partition (11). A fixing plate (17) is provided at the end of the fixing rod (16). An elastic member (26) is sleeved on the fixing rod (16) located between the partition (11) and the magnet (14). An air jet pipe (18) is also provided on the side of the cylinder (10) facing the conical end of the fixing plate (17). The air jet pipe (18) is mounted on the fixing plate (17) through a plurality of connecting rods (19). The air jet pipe (18) extends to the outside of the cylinder (10) at the conical end and a plurality of air jet holes are provided on the tube body at the end of the air jet pipe (18). An air inlet port (20) is provided between the fixing plate (17) and the cylinder (10) at the conical end and close to the fixing plate (17) at the top of the cylinder (10). The air inlet port (20) is connected to a pipeline of a shock wave generator (8).

2. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1 is characterized in that: A boost valve (21) is also provided on the pipeline between the air compressor (2) and the pressure regulating tank (3).

3. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1 is characterized in that: A one-way valve (22) is also provided on the pipeline between the pressure regulating tank (3) and the filter (4).

4. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 2 is characterized in that: It also includes a controller (23), which is used to control the actions of the air compressor (2), the pressure regulating tank (3), the solenoid valve (7), the shock wave generator (8), the electromagnet (12), and the boost valve (21).

5. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1 is characterized in that: An air pressure sensor (24) corresponding to the air inlet pipe opening (20) is arranged at the bottom of the cylinder (10).

6. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1, characterized in that: A sealing block (25) is arranged inside the conical structure end of the cylinder (10).

7. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1 is characterized in that: The diameter of the fixing plate (17) is greater than the diameter of the fixing rod (16).

8. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1, characterized in that: The connection between the fixing rod (16) and the partition plate (11) is mechanically sealed.

9. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 1, characterized in that: A second elastic member (27) is also provided between the electromagnet (12) and the magnet (14).

10. The cement kiln SCR denitrification high-efficiency sootblowing system according to claim 4, characterized in that: A heating coil (28) is also provided outside the pressure regulating tank (3), and a temperature sensor (29) is also provided inside the pressure regulating tank (3). The temperature sensor (29) transmits the detected temperature value to the controller (23) for display.

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