Oxygen-enriched combustion equipment for power generation in a thermal power plant

Abstract

The application relates to a kind of oxygen-enriched combustion equipment for power generation of thermal power plant, including combustion furnace, the inner portion of the combustion furnace is respectively provided with steam generator, first filter plate and combustion hopper, steam generator is fixedly connected at the top of the inner wall of combustion furnace, first filter plate is fixedly connected in the middle section of the inner wall of combustion furnace by connecting sheet, combustion hopper is fixedly arranged at the inner bottom of combustion furnace, the bottom of combustion hopper is fixedly connected with oxygen inlet pipe;Water inlet pipe and coal inlet pipe are respectively fixedly connected on the outer wall of the left side of the combustion furnace, coal inlet pipe is located at the lower part of water inlet pipe;Water inlet pipe and steam generator are connected;The top of the combustion furnace is fixedly connected with steam pipe, the top position of the front face outside the combustion furnace is fixedly connected with water level indicator, water level indicator and steam pipe are connected with steam generator, the right side of the inner top of the combustion furnace is provided with fixed block, the right side of fixed block is provided with sealing plate, sealing plate is fixedly connected with combustion furnace by fixed block.

Description

Technical Field

[0001] This invention relates to an oxygen-enriched combustion device for power generation in thermal power plants, and is applied in the technical field of oxygen-enriched combustion devices for thermal power plants. Background Technology

[0002] As is generally known, a thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials as fuel to produce electricity. Its basic production process is as follows: fuel heats water to generate steam during combustion, converting the chemical energy of the fuel into heat energy. The steam pressure drives a turbine to rotate, converting the heat energy into mechanical energy. The turbine then drives a generator to rotate, converting the mechanical energy into electrical energy. Coal or pulverized coal is the primary fuel in thermal power plants. The fuel burns by contacting oxygen, and depending on the oxygen ratio, oxygen-enriched combustion occurs between the fuel and the pulverized coal. The exhaust gas is discharged through a flue. During the combustion of pulverized coal, the injection of oxygen creates an airflow inside the combustion furnace, which can easily carry unburned pulverized coal through the flue gas. This results in incomplete combustion of the pulverized coal in the combustion furnace, leading to resource waste. Furthermore, the unburned pulverized coal can clog filter plates and pollute the air during discharge, ultimately reducing efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an oxygen-enriched combustion device for power generation in thermal power plants. By setting a first filter plate, it solves the problem of resource waste caused by incomplete combustion of pulverized coal in the combustion furnace. By rotating a first fan blade at the lower part of the first filter plate, it solves the problem of clogging of the first filter plate, thereby reducing air pollution and improving production efficiency.

[0004] The technical solution of the present invention is as follows:

[0005] An oxygen-enriched combustion device for power generation in a thermal power plant includes a combustion furnace. Inside the combustion furnace, a steam generator, a first filter plate, and a combustion hopper are respectively arranged. The steam generator is fixedly connected to the top of the inner wall of the combustion furnace. The first filter plate is fixedly connected to the middle section of the inner wall of the combustion furnace through a connecting piece. The combustion hopper is fixedly arranged at the bottom of the combustion furnace, and an oxygen inlet pipe is fixedly connected to the bottom of the combustion hopper.

[0006] A water inlet pipe and a coal inlet pipe are fixedly connected to the outer wall on the left side of the combustion furnace, with the coal inlet pipe located below the water inlet pipe; the water inlet pipe is connected to the steam generator.

[0007] A steam pipe is fixedly connected to the top of the combustion furnace, and a water level gauge is fixedly connected to the top of the exterior front of the combustion furnace. Both the water level gauge and the steam pipe are connected to the steam generator. A fixing block is set on the right side of the top of the combustion furnace, and a sealing plate is set on the right side of the fixing block. The sealing plate is fixedly connected to the combustion furnace through the fixing block.

[0008] An exhaust pipe and a placement box are respectively installed on the outer wall of the right side of the combustion furnace. The exhaust pipe is located on the right side of the sealing plate. A connecting ring is installed on the outside of the exhaust pipe. A second filter plate is fixedly connected to the right end of the inner wall of the connecting ring. The second filter plate penetrates the cross-section of the exhaust pipe. The placement box is located at the lower part of the exhaust pipe. A collection box is installed inside the placement box. A collection pipe is fixedly connected to the top of the placement box. The collection pipe connects the exhaust pipe and the inside of the collection box.

[0009] A support rod is fixedly connected to the bottom of the first filter plate. A support bolt is fixedly connected to the center of the bottom surface of the support rod. A first rotating shaft is fixedly connected to the bottom of the support bolt. A first bearing is provided on the outside of the first rotating shaft. Four first fan blades are connected to the outside of the first bearing.

[0010] The support rod is a long strip structure and is made of high-temperature resistant material.

[0011] Two mounting blocks are fixedly installed on the outer side of the top of the first bearing. A mounting strip is fixedly connected to the top of the mounting block, a wire brush is fixedly connected to the top of the mounting strip, and a support block is fixedly connected to the bottom end of the mounting strip away from the mounting block.

[0012] Two limiting blocks are fixedly connected to the inner wall of the combustion chamber. A venting plate is also provided inside the combustion chamber. The venting plate is located below the limiting blocks. An igniter is fixedly connected to the top surface of the venting plate.

[0013] The first filter plate and the second filter plate are respectively provided with a number of uniformly distributed filter holes, and the diameter of the filter holes on the second filter plate is smaller than the diameter of the filter holes on the first filter plate.

[0014] A second rotating shaft is fixedly connected to the center of the left side wall of the second filter plate. A second bearing is provided on the outside of the second rotating shaft. Four second fan blades are fixedly connected to the outside of the second bearing.

[0015] Two fixing strips are fixedly connected to the outer end of the right side wall of the second bearing, and a wire brush is fixedly connected to the right side wall of the fixing strips.

[0016] The present invention has the following beneficial effects:

[0017] In this invention, when using oxygen-enriched combustion and pulverized coal for power generation, the airflow generated when the oxygen inlet pipe enters the combustion furnace drives the first blade to rotate, which in turn drives two mounting strips fixed on the first bearing to rotate at the bottom of the first filter plate. The wire brushes on the mounting strips clean the bottom of the first filter plate, effectively preventing pulverized coal from accumulating and causing blockages. The brushed-off pulverized coal is fully burned in the combustion furnace, increasing combustion efficiency. The ash after complete combustion passes through the first filter plate and is discharged into the exhaust pipe, where it undergoes secondary filtration by the second filter plate. The fully burned ash falls into the collection box through the collection pipe, while the gas directly passes through the second filter plate for secondary treatment. This device avoids the problem of incomplete combustion caused by the airflow inside the combustion furnace carrying burning pulverized coal through the exhaust pipe. Furthermore, the first blade cleans the first filter plate to prevent blockages, and the ash after combustion is blocked by the second filter plate to prevent direct release into the air and environmental pollution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the steam generator in this invention;

[0020] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the steel wire brush in this invention;

[0022] Figure 5 This is a schematic diagram of the igniter in this invention;

[0023] Figure 6 This is a schematic diagram of the structure of the first filter plate in this invention;

[0024] Figure 7 This is a schematic diagram of the structure of the second filter plate in this invention;

[0025] The reference numerals in the figure are as follows:

[0026] 1. Combustion furnace; 2. Oxygen inlet pipe; 3. Collection box; 4. Placement box; 5. Collection pipe; 6. Connecting ring; 7. Exhaust pipe; 8. Steam pipe; 9. Water level gauge; 10. Water inlet pipe; 11. Coal inlet pipe; 12. Steam generator; 13. Fixing block; 14. Sealing plate; 15. Combustion hopper; 16. First fan blade; 17. First filter plate; 18. First bearing; 19. Mounting block; 20. First rotating shaft; 21. Mounting strip; 22. Support block; 23. Wire brush; 24. Air permeable plate; 25. Limiting block; 26. Support bolt; 27. Connecting piece; 28. Support rod; 29. ​​Second fan blade; 30. Fixing strip; 31. Second filter plate; 32. Second bearing; 33. Second rotating shaft; 34. Ignition device. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] See Figures 1 to 7 The oxygen-enriched combustion equipment for power generation in a thermal power plant includes a combustion furnace 1. Inside the combustion furnace 1, a steam generator 12, a first filter plate 17, and a combustion hopper 15 are respectively arranged. The steam generator 12 is fixedly connected to the top of the inner wall of the combustion furnace 1. The first filter plate 17 is fixedly connected to the middle section of the inner wall of the combustion furnace 1 through a connecting piece 27. The combustion hopper 15 is fixedly arranged at the bottom of the combustion furnace 1, and an oxygen inlet pipe 2 is fixedly connected to the bottom of the combustion hopper 15.

[0029] A water inlet pipe 10 and a coal inlet pipe 11 are fixedly connected to the outer wall on the left side of the combustion furnace 1, with the coal inlet pipe 11 located below the water inlet pipe 10. The water inlet pipe 10 is connected to the steam generator 12 to supply water to the inside of the combustion furnace 1, and the coal inlet pipe 11 conveys pulverized coal into the inside of the combustion furnace 1 through a conveying device.

[0030] A steam pipe 8 is fixedly connected to the top of the combustion furnace 1. A water level sensor 9 is fixedly connected to the top of the external front of the combustion furnace 1. Both the water level sensor 9 and the steam pipe 8 are connected to the steam generator 12. A fixing block 13 is provided on the right side of the top of the combustion furnace 1. A sealing plate 14 is provided on the right side of the fixing block 13. The sealing plate 14 is fixedly connected to the combustion furnace 1 through the fixing block 13. The sealing plate 14 ensures that the combustion furnace 1 will not leak gas or fire after installation.

[0031] The outer wall of the right side of the combustion furnace 1 is provided with a flue pipe 7 and a placement box 4. The flue pipe 7 is located on the right side of the sealing plate 14. A connecting ring 6 is provided on the outside of the flue pipe 7. A second filter plate 31 is fixedly connected to the right end of the inner wall of the connecting ring 6. The second filter plate 31 penetrates the cross-section of the flue pipe 7. The placement box 4 is located at the lower part of the flue pipe 7. A collection box 3 is provided inside the placement box 4. A collection pipe 5 is fixedly connected to the top of the placement box 4. The collection pipe 5 connects the inside of the flue pipe 7 and the collection box 3.

[0032] A support rod 28 is fixedly connected to the bottom of the first filter plate 17. A support bolt 26 is fixedly connected to the center of the bottom surface of the support rod 28. A first rotating shaft 20 is fixedly connected to the bottom of the support bolt 26. A first bearing 18 is provided on the outside of the first rotating shaft 20. Four first fan blades 16 are connected to the outside of the first bearing 18.

[0033] The support rod 28 has a long strip structure and is made of high-temperature resistant material.

[0034] Two mounting blocks 19 are fixedly installed on the outer side of the top end of the first bearing 18. A mounting strip 21 is fixedly connected to the top of the mounting block 19, and a wire brush 23 is fixedly connected to the top of the mounting strip 21. A support block 22 is fixedly connected to the bottom end of the mounting strip 21 away from the mounting block 19. The two support blocks 22 are respectively connected to two of the four first fan blades 16, and provide support for the mounting strip 21.

[0035] Two limiting blocks 25 are fixedly connected to the inner wall of the combustion hopper 15. A venting plate 24 is also provided inside the combustion hopper 15, located below the limiting blocks 25. An igniter 34 is fixedly connected to the top surface of the venting plate 24. The venting plate 24 is fixed to the inner wall of the combustion hopper 15 by the limiting blocks 25. Air holes are provided on the venting plate 24 to allow oxygen enrichment to enter.

[0036] The first filter plate 17 and the second filter plate 31 are respectively provided with a plurality of evenly distributed filter holes, and the diameter of the filter holes on the second filter plate 31 is smaller than the diameter of the filter holes on the first filter plate 17. The filter holes provided on the first filter plate 17 facilitate the discharge of dust and the flow of heat.

[0037] The first fan blade 16 is an arc-shaped structure with a central protrusion that gradually flattens towards both ends, which facilitates the rotation of the first fan blade 16 by the airflow below.

[0038] A second rotating shaft 33 is fixedly connected to the center of the left side wall of the second filter plate 31. A second bearing 32 is provided on the outside of the second rotating shaft 33. Four second fan blades 29 are fixedly connected to the outside of the second bearing 32.

[0039] Two fixing strips 30 are fixedly connected to the outer end of the right side wall of the second bearing 32, and a wire brush 23 is fixedly connected to the right side wall of the fixing strips 30.

[0040] Working principle of the invention:

[0041] When using this invention, pulverized coal enters the combustion hopper 15 above the combustion chamber 1 through the coal inlet pipe 11, while oxygen-enriched coal enters the combustion chamber 1 from the bottom of the combustion hopper 15 through the oxygen inlet pipe 2. Simultaneously, the igniter 34 is activated to ignite the pulverized coal and oxygen-enriched coal. During combustion, the pulverized coal is pushed upwards by the airflow. The upward-moving pulverized coal is then fully combusted inside the combustion chamber 1 by the obstruction of the first filter plate 17. The heat generated by combustion is transferred to the steam generator 12 through the filter holes on the first filter plate 17 for heating. The dense pulverized coal during combustion easily accumulates at the bottom of the first filter plate 17, causing blockage. Therefore, the airflow generated when the pulverized coal enters the combustion chamber 1 through the oxygen inlet pipe 2 drives the first fan blade 16 to... The first bearing 18 rotates on the first rotating shaft 20, thereby driving the two mounting strips 21 fixed on the first bearing 18 to rotate at the bottom of the first filter plate 17. The wire brushes 23 on the mounting strips 21 clean the bottom of the first filter plate 17, preventing blockage caused by coal dust accumulating at the bottom of the first filter plate 17. The coal dust brushed off will be further fully burned in the combustion furnace 1, thereby increasing the combustion efficiency. The dust after full combustion will pass through the first filter plate 17 and be discharged through the flue pipe 7. The dust entering the flue pipe 7 will be further filtered by the second filter plate 31, thus allowing the fully burned dust to fall into the collection box 3 through the collection pipe 5. The gas will directly pass through the second filter plate 31 for secondary treatment. Similarly, the airflow drives the second fan blade 29 to rotate on the second rotating shaft 33 via the second bearing 32, ultimately enabling the wire brushes 23 on the fixing strip 30 to clean the second filter plate 31.

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An oxygen-enriched combustion apparatus for power generation in a thermal power plant, characterized by: The combustion furnace includes a steam generator, a first filter plate, and a combustion hopper. The steam generator is fixedly connected to the top of the inner wall of the combustion furnace. The first filter plate is fixedly connected to the middle section of the inner wall of the combustion furnace via a connecting piece. The combustion hopper is fixedly located at the bottom of the combustion furnace, and an oxygen inlet pipe is fixedly connected to the bottom of the combustion hopper. A water inlet pipe and a coal inlet pipe are fixedly connected to the outer wall on the left side of the combustion furnace, with the coal inlet pipe located below the water inlet pipe; the water inlet pipe is connected to the steam generator. A steam pipe is fixedly connected to the top of the combustion furnace, and a water level gauge is fixedly connected to the top of the exterior front of the combustion furnace. Both the water level gauge and the steam pipe are connected to the steam generator. A fixing block is set on the right side of the top of the combustion furnace, and a sealing plate is set on the right side of the fixing block. The sealing plate is fixedly connected to the combustion furnace through the fixing block. A flue pipe and a placement box are respectively installed on the outer wall of the right side of the combustion furnace. The flue pipe is located on the right side of the sealing plate. A connecting ring is installed on the outside of the flue pipe. A second filter plate is fixedly connected to the right end of the inner wall of the connecting ring. The second filter plate penetrates the cross-section of the flue pipe. The placement box is located at the bottom of the flue pipe. A collection box is installed inside the placement box. A collection pipe is fixedly connected to the top of the placement box. The collection pipe connects the inside of the flue pipe and the collection box. A support rod is fixedly connected to the bottom of the first filter plate. A support bolt is fixedly connected to the center of the bottom surface of the support rod. A first rotating shaft is fixedly connected to the bottom of the support bolt. A first bearing is provided on the outside of the first rotating shaft. Four first fan blades are connected to the outside of the first bearing. Two mounting blocks are fixedly installed on the outer side of the top of the first bearing. A mounting strip is fixedly connected to the top of the mounting block, a wire brush is fixedly connected to the top of the mounting strip, and a support block is fixedly connected to the bottom end of the mounting strip away from the mounting block.

2. A device for oxygen enriched combustion for power generation in a thermal power plant as claimed in claim 1, wherein: The support rod is a long strip structure and is made of high-temperature resistant material.

3. The oxygen-enriched combustion equipment for power generation in a thermal power plant as described in claim 1, characterized in that: Two limiting blocks are fixedly connected to the inner wall of the combustion chamber. A venting plate is also provided inside the combustion chamber. The venting plate is located below the limiting blocks. An igniter is fixedly connected to the top surface of the venting plate.

4. The oxygen-enriched combustion equipment for power generation in a thermal power plant as described in claim 1, characterized in that: The first filter plate and the second filter plate are respectively provided with a number of uniformly distributed filter holes, and the diameter of the filter holes on the second filter plate is smaller than the diameter of the filter holes on the first filter plate.

5. The oxygen-enriched combustion equipment for power generation in a thermal power plant as described in claim 4, characterized in that: A second rotating shaft is fixedly connected to the center of the left side wall of the second filter plate. A second bearing is provided on the outside of the second rotating shaft. Four second fan blades are fixedly connected to the outside of the second bearing.

6. The oxygen-enriched combustion equipment for power generation in a thermal power plant as described in claim 5, characterized in that: Two fixing strips are fixedly connected to the outer end of the right side wall of the second bearing, and a wire brush is fixedly connected to the right side wall of the fixing strips.

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