A flue gas treatment device and method for a thermal power plant

Abstract

This invention belongs to the field of flue gas treatment technology, specifically a flue gas treatment device and method for thermal power plants. Addressing the limitation of current flue gas treatment equipment in effectively collecting particulate matter from flue gas, this invention proposes the following solution: a treatment chamber with a top plate at its top, featuring pipe holes; a separation chamber fixedly connected to the bottom of the treatment chamber; and a particle separation component inside the separation chamber. This component includes a bowl-shaped retaining plate and a central ring, with multiple circumferentially spaced mounting openings above the central ring. Each mounting opening is equipped with an outer umbrella rod, and the outer umbrella rod is surrounded by multiple equidistant filamentous fiber rods. This invention discloses a flue gas treatment device and method for thermal power plants that utilizes filamentous fiber rods to achieve effective contact with the flue gas, reducing the flue gas velocity and the kinetic energy of the particulate matter, thereby causing the accompanying particulate matter in the flue gas to descend and separate from the flue gas.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and in particular to a flue gas treatment device and method for thermal power plants. Background Technology

[0002] A thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials (such as coal) as fuel to produce electricity. The main equipment involved are boilers, steam turbines, and generators. Combustion of combustible materials in the boiler produces high-temperature flue gas.

[0003] To meet emission standards, flue gas needs to be treated. Since continuous combustion operations can lead to incomplete combustion of combustibles, particulate matter will be present in the flue gas. Collecting particulate matter can improve the utilization rate of raw materials. However, current flue gas treatment equipment cannot effectively collect particulate matter in flue gas. Summary of the Invention

[0004] This invention discloses a flue gas treatment device and method for thermal power plants, aiming to solve the technical problem in the background art that current flue gas treatment equipment cannot effectively collect particulate matter in flue gas.

[0005] This invention proposes a flue gas treatment device for thermal power plants, comprising a treatment chamber, a top plate with pipe holes on the top plate, and a separation chamber fixedly connected to the bottom of the treatment chamber. The separation chamber contains a particle separation component, which includes a bowl-shaped retaining plate and a central ring. Multiple circumferentially spaced mounting openings are located above the central ring, each mounting opening has an outer umbrella rod. Multiple equidistant filamentous fiber rods are arranged on the outside of each outer umbrella rod, and a movable cylinder is fixedly connected to the lower end of each outer umbrella rod. The movable cylinders are rotatably connected to the mounting openings via bearings, and a coil spring is provided between the movable cylinder and the inner wall of the mounting opening.

[0006] In a preferred embodiment, a support frame is fixedly connected to the upper side of the bowl-shaped buckle, and multiple circumferentially spaced support rods are fixedly connected to the upper outer side of the support frame. The top ends of the multiple support rods are fixedly connected to the lower side of the central ring, and a bracket is fixedly connected to the lower side of the bowl-shaped buckle, which is fixedly connected to the inner wall of the separation cavity.

[0007] In a preferred embodiment, a smoke inlet pipe is fixedly connected to the tube hole of the top plate. The upper end of the smoke inlet pipe has three circumferentially spaced external smoke pipe interfaces, and the lower end of the smoke inlet pipe is fixedly connected to a smoke inlet horn, which is located inside the processing chamber.

[0008] In a preferred embodiment, a top flow chamber is fixedly connected above the processing chamber, and the top flow chamber is fixedly connected to the upper side of the top plate. Two external discharge ports are opened above the top flow chamber, and external discharge pipes are fixedly connected to both external discharge ports. A rotating frame is rotatably connected between the top plate and the processing chamber through a bearing, and a downflow fan is provided on the rotating frame.

[0009] In a preferred embodiment, the processing chamber is provided with a plurality of circumferentially spaced through holes, and each through hole is fixedly connected to an atomizing nozzle. The nozzle of the atomizing nozzle is located inside the processing chamber and is inclined downward. The tail ends of the plurality of atomizing nozzles are located outside the processing chamber and are fixedly connected to the same annular water supply pipe. The annular water supply pipe is fixedly connected to the outer wall of the processing chamber and is provided with a water injection interface.

[0010] In a preferred embodiment, a bottom accumulation chamber is fixedly connected below the separation chamber, a bowl-shaped buckle is located directly above the bottom accumulation chamber, and a material discharge port is provided below the bottom accumulation chamber.

[0011] In a preferred embodiment, a support frame is fixedly connected to the outside of the processing chamber, and a base frame is fixedly connected below the support frame. The base frame provides external support for the separation chamber, and a particle collection module is provided on the base frame.

[0012] In a preferred embodiment, the particle collection module includes a collection cylinder placed at an angle, a drain outlet at the lower end of the collection cylinder, a filter screen on the drain outlet, a drain box fixedly connected below the drain outlet, three drain pipes on the drain box, and a discharge port at the lower end of the upper end of the collection cylinder, with a discharge hopper fixedly connected below the discharge port.

[0013] In a preferred embodiment, a shaft is rotatably connected inside the collecting cylinder via a bearing, and a spiral feeding blade is fixedly connected to the outside of the shaft. The collecting cylinder is connected to the bottom accumulation cavity via a discharge port, and a drive motor is fixedly connected to the side of the collecting cylinder near the discharge port. The drive motor is connected to the shaft via a coupling.

[0014] A method for treating flue gas from a thermal power plant, using a flue gas treatment device for a thermal power plant as described above, includes the following steps:

[0015] Step 1: The flue gas enters the inlet pipe from the external flue pipe interface and is blown downwards into the treatment chamber by the inlet horn;

[0016] Step 2: The particle separation component traps particles in the flue gas within the processing chamber. During this process, the atomizing nozzle sprays the gas, and the flue gas changes direction within the separation chamber before entering the top flow chamber and being discharged from the external exhaust pipe.

[0017] Step 3: After separation, the particles flow into the bottom accumulation chamber and enter the collection cylinder from the discharge port. The particle collection module drains the particles and discharges them in a concentrated manner.

[0018] As can be seen from the above, the flue gas treatment device for thermal power plants provided by the present invention utilizes filamentous fiber rods to achieve effective contact with flue gas, reduce the flow rate of flue gas and the kinetic energy of particulate matter, thereby promoting the descent of particulate matter accompanying the flue gas and achieving separation from the flue gas. At the same time, the inclined collection cylinder can continuously collect mud-like particles, ensuring the continuity of the flue gas treatment process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a flue gas treatment device for a thermal power plant proposed in this invention.

[0020] Figure 2 This is a cross-sectional structural schematic diagram of a flue gas treatment device for a thermal power plant proposed in this invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the separation chamber of a flue gas treatment device for a thermal power plant proposed in this invention.

[0022] Figure 4 This is a schematic diagram of the central ring structure of a flue gas treatment device for a thermal power plant proposed in this invention;

[0023] Figure 5 This is a schematic diagram of the treatment chamber and top flow chamber structure of a flue gas treatment device for a thermal power plant proposed in this invention;

[0024] Figure 6 This is a schematic diagram of the particle collection module structure of a flue gas treatment device for a thermal power plant proposed in this invention.

[0025] In the diagram: 1. Processing chamber; 2. Top plate; 3. Pipe hole; 4. Separation chamber; 5. Particle separation assembly; 501. Bowl-shaped buckle; 502. Central ring; 503. Outer umbrella rod; 504. Filamentous fiber rod; 505. Adjustable cylinder; 506. Coil spring; 507. Stand; 508. Support rod; 509. Bracket; 6. Smoke inlet pipe; 7. External smoke pipe interface; 8. Smoke inlet horn; 9. Top flow chamber; 10. Rotating frame; 11. Downflow fan; 12. External exhaust pipe; 13. Atomizing nozzle; 14. Annular water supply pipe; 15. Water injection interface; 16. Bottom accumulation cavity; 17. Material discharge port; 18. Support frame; 19. Base frame; 20. Particle collection module; 2001. Collection cylinder; 2002. Drain outlet; 2003. Discharge port; 2004. Filter screen; 2005. Drain box; 2006. Drain pipe; 2007. Discharge bin; 2008. Shaft; 2009. Spiral feeder blade; 2010. Drive motor. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] The flue gas treatment device for thermal power plants disclosed in this invention is mainly applied to scenarios where current flue gas treatment equipment cannot effectively collect particulate matter in flue gas.

[0028] Reference Figure 1-6 A flue gas treatment device for a thermal power plant includes a treatment chamber 1, a top plate 2 above the treatment chamber 1, a pipe hole 3 on the top plate 2, and a separation chamber 4 fixedly connected below the treatment chamber 1. A particle separation component 5 is provided inside the separation chamber 4. The particle separation component 5 includes a bowl-shaped buckle 501 and a central ring 502. Multiple circumferentially spaced mounting ports are provided above the central ring 502. Each mounting port is provided with an outer umbrella rod 503. Multiple equidistant filamentous fiber rods 504 are provided outside the outer umbrella rod 503. The lower end of each outer umbrella rod 503 is fixedly connected with a movable cylinder 505. The multiple movable cylinders 505 are rotatably connected to the mounting ports through bearings. A coil spring 506 is provided between the movable cylinder 505 and the inner wall of the mounting port.

[0029] In this invention, a support frame 507 is fixedly connected to the upper side of the bowl-shaped fastener 501, and a plurality of circumferentially spaced support rods 508 are fixedly connected to the upper outer side of the support frame 507. The top ends of the plurality of support rods 508 are fixedly connected to the lower side of the central ring 502, and a bracket 509 is fixedly connected to the lower side of the bowl-shaped fastener 501. The bracket 509 is fixedly connected to the inner wall of the separation cavity 4.

[0030] Specifically, the flue gas is blown into the outer umbrella rod 503 in the form of outward expansion. The particles in the flue gas will collide with the filamentous fiber rod 504 to reduce the kinetic energy of the flue gas particles. At the same time, after the flue gas expands outward, it contacts the filamentous fiber rod 504 and the inner wall of the separation chamber 4 and then flows back. The overall flow velocity of the flue gas decreases, and the particles accompanying the flow of the flue gas will descend.

[0031] In specific application scenarios, the particle separation component 5 is suitable for the separation and settling of particulate matter in flue gas. That is, the particle separation component 5 uses the filamentous fiber rod 504 to achieve effective contact with the flue gas, reduce the flow rate of the flue gas and the kinetic energy of the particulate matter, thereby promoting the settling of the particulate matter in the flue gas and achieving separation from the flue gas. The outer umbrella rod 503 adopts a movable connection and will shake under the blowing of the flue gas. The elasticity of the coil spring 506 controls the shaking amplitude. The filamentous fiber rod 504 in the form of shaking can further improve the contact effect with the flue gas.

[0032] Reference Figure 1 , Figure 2 and Figure 3In a preferred embodiment, a smoke inlet pipe 6 is fixedly connected to the pipe hole 3 of the top plate 2. The upper end of the smoke inlet pipe 6 is provided with three circumferentially equidistant external smoke pipe interfaces 7, and the lower end of the smoke inlet pipe 6 is fixedly connected with a smoke inlet horn 8, which is located inside the processing chamber 1.

[0033] Specifically, the smoke inlet horn 8 can blow the smoke into the processing chamber 1 in an outward manner, thereby increasing the diffusion range of the smoke and thus increasing the contact effect between the smoke and the filamentous fiber rod 504.

[0034] Reference Figure 1 , Figure 2 and Figure 5 In a preferred embodiment, a top flow chamber 9 is fixedly connected above the processing chamber 1. The top flow chamber 9 is fixedly connected to the upper side of the top plate 2. Two external discharge ports are opened above the top flow chamber 9. An external discharge pipe 12 is fixedly connected to each of the two external discharge ports. A rotating frame 10 is rotatably connected between the top plate 2 and the processing chamber 1 through a bearing. A downflow fan 11 is provided on the rotating frame 10.

[0035] Specifically, as the flue gas enters the top flow chamber 9, the flowing flue gas acts on the downflow fan 11, causing it to rotate. This process further reduces the flue gas velocity, thereby preventing small suspended particles from continuing to flow with the flue gas and further improving the separation effect of particulate matter in the flue gas.

[0036] Reference Figure 2 , Figure 3 and Figure 5 In a preferred embodiment, the processing chamber 1 is provided with a plurality of circumferentially spaced through holes, and an atomizing nozzle 13 is fixedly connected inside each of the plurality of through holes. The nozzle of the atomizing nozzle 13 is located inside the processing chamber 1 and is inclined downward. The tail ends of the plurality of atomizing nozzles 13 are located outside the processing chamber 1 and are fixedly connected to the same annular water supply pipe 14. The annular water supply pipe 14 is fixedly connected to the outer wall of the processing chamber 1, and a water injection interface 15 is provided on the annular water supply pipe 14.

[0037] Specifically, after the external water pipe is connected to the water inlet 15, during the flue gas treatment process, the atomizing nozzle 13 will always spray onto the position of the filamentous fiber rod 504. After the spray comes into contact with the particulate matter in the flue gas, it will increase its weight, thereby further promoting the particulate matter to fall and separate from the flue gas.

[0038] Reference Figure 2 and Figure 3 In a preferred embodiment, a bottom accumulation cavity 16 is fixedly connected to the lower part of the separation cavity 4, the bowl-shaped buckle 501 is located directly above the bottom accumulation cavity 16, and a material discharge port 17 is provided below the bottom accumulation cavity 16.

[0039] Specifically, the separation chamber 4 adopts a structure that is wider at the top and narrower at the bottom, which can effectively restrict the flow of flue gas. Combined with the hemispherical structure of the bottom cavity 16, it can effectively prevent the flue gas from continuing to flow downward, thus ensuring the upward flow of the flue gas after its velocity is reduced.

[0040] Reference Figure 1 , Figure 2 and Figure 6 In a preferred embodiment, a support frame 18 is fixedly connected to the outside of the processing chamber 1, and a base frame 19 is fixedly connected below the support frame 18. The base frame 19 provides external support for the separation chamber 4, and a particle collection module 20 is provided on the base frame 19. The particle collection module 20 includes a collection cylinder 2001, which is placed at an incline. A drain outlet 2002 is provided at the lower part of the lower end of the collection cylinder 2001. A filter screen 2004 is provided on the drain outlet 2002, and a drain box 2005 is fixedly connected below the drain outlet 2002. Three filters are provided on the drain box 2005. The collection cylinder 2001 has a drain pipe 2006 and a discharge port 2003 at the lower part of the upper end. A discharge bin 2007 is fixedly connected below the discharge port 2003. A shaft 2008 is rotatably connected inside the collection cylinder 2001 through a bearing. A spiral feed blade 2009 is fixedly connected to the outside of the shaft 2008. The collection cylinder 2001 is connected to the bottom accumulation cavity 16 through a drop port 17. A drive motor 2010 is fixedly connected to the side of the collection cylinder 2001 near the discharge port 2003. The drive motor 2010 is connected to the shaft 2008 through a coupling.

[0041] Specifically, the mud-like particles enter the collection cylinder 2001. Since the collection cylinder 2001 is placed at an incline, the mud-like particles will flow to the lower end of the collection cylinder 2001 under the influence of gravity. The drive motor 2010 will drive the shaft 2008 to rotate continuously, and the screw feeder 2009 will slowly convey the mud-like particles upward until they reach the discharge port 2003 and are discharged from the discharge bin 2007. During this process, the mud-like particles will be squeezed under the driving force of the screw feeder 2009 and their own gravity. At the same time, excess water will flow out from the drain port 2002, be collected by the drain box 2005, and be discharged from the drain pipe 2006. As the mud-like particles continue to be conveyed upward, they will be promoted to form granular clumps.

[0042] In specific application scenarios, the particle collection module 20 is suitable for the collection stage after particle separation in flue gas. That is, the particle collection module 20 uses an inclined collection cylinder 2001 to continuously collect mud-like particles, ensuring the continuity of the flue gas treatment process. The collection stage can drain excess water from the mud-like particles and squeeze the mud-like particles to make them form clumps, which makes it easier to collect particles in the flue gas.

[0043] A method for treating flue gas from a thermal power plant, using a flue gas treatment device for a thermal power plant as described above, includes the following steps:

[0044] Step 1: The flue gas enters the inlet pipe 6 from the external flue pipe interface 7 and is blown downward into the treatment chamber 1 by the inlet horn 8;

[0045] Step 2: The particle separation component 5 traps particles in the flue gas within the processing chamber 1 (the flue gas is blown into the outer umbrella rod 503 in an outward expansion manner; the particles in the flue gas collide with the filamentous fiber rod 504, reducing the kinetic energy of the flue gas particles; at the same time, after the flue gas expands outward, it contacts the filamentous fiber rod 504 and the inner wall of the separation chamber 4 before flowing back, reducing the overall flow velocity of the flue gas, and the particles accompanying the flue gas flow will descend). During this process, the atomizing nozzle 13 sprays (after the external water pipe is connected to the water injection interface 15, the atomizing nozzle 13 will always spray the filamentous fiber rod 504 during the flue gas processing stage; after the spray comes into contact with the particles in the flue gas, it increases their weight, thereby further promoting the particles to descend and separate from the flue gas). After the flue gas changes direction in the separation chamber 4, it enters the top flow chamber 9 upward and is discharged from the outer exhaust pipe 12 (during the process of the flue gas entering the top flow chamber 9, the flowing flue gas will act on the downflow fan 11, causing it to rotate).

[0046] Step 3: After separation, the particles flow into the bottom accumulation chamber 16 and enter the collection cylinder 2001 through the discharge port 17 (after the particles fall, they form mud with the water mist, flow downward into the bottom accumulation chamber 16 and into the collection cylinder 2001 through the discharge port 17). The particle collection module 20 drains and discharges the particles (the mud particles enter the collection cylinder 2001. Since the collection cylinder 2001 is placed at an incline, the mud particles will flow to the lower end of the collection cylinder 2001 due to gravity. The drive motor 2010 will drive the shaft 2008 to rotate continuously. The screw feeder 2009 will slowly convey the mud particles upward until they reach the discharge port 2003 and are discharged from the discharge bin 2007. During this process, the mud particles will be squeezed under the driving force of the screw feeder 2009 and their own gravity. At the same time, excess water will flow out from the drain port 2002, be collected by the drain box 2005, and be discharged from the drain pipe 2006. The mud particles will continue to be conveyed upward, which will promote the formation of particle clumps).

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flue gas treatment device for a thermal power plant, comprising a treatment chamber (1), characterized in that, A top plate (2) is provided above the processing chamber (1), and a pipe hole (3) is provided on the top plate (2). A separation chamber (4) is fixedly connected below the processing chamber (1). A particle separation component (5) is provided inside the separation chamber (4). The particle separation component (5) includes a bowl-shaped buckle (501) and a central ring (502). A plurality of circumferentially equidistant mounting holes are provided above the central ring (502). An outer umbrella rod (503) is provided on each of the mounting holes. A plurality of equidistant filamentous fiber rods (504) are provided on the outside of the outer umbrella rod (503). A movable cylinder (505) is fixedly connected to the lower end of the outer umbrella rod (503). The movable cylinders (505) are rotatably connected to the mounting holes through bearings. A coil spring (506) is provided between the movable cylinder (505) and the inner wall of the mounting hole. The processing chamber (1) is fixedly connected to the outside of a support frame (18), and a base frame (19) is fixedly connected below the support frame (18). The base frame (19) provides external support for the separation chamber (4), and a particle collection module (20) is provided on the base frame (19). The particle collection module (20) includes a collection cylinder (2001), which is placed at an incline. A drain outlet (2002) is provided at the lower part of the collection cylinder (2001). A filter screen (2004) is provided on the drain outlet (2002). A drain box (2005) is fixedly connected below the drain outlet (2002). Three drain pipes (2006) are provided on the drain box (2005). A discharge port (2003) is provided at the lower part of the upper part of the collection cylinder (2001). A discharge bin (2007) is fixedly connected below the discharge port (2003).

2. The flue gas treatment device for thermal power plants according to claim 1, characterized in that, The upper side of the bowl-shaped buckle (501) is fixedly connected to a stand (507), and the upper end of the stand (507) is fixedly connected to a plurality of circumferentially spaced support rods (508). The top of the plurality of support rods (508) is fixedly connected to the lower side of the central ring (502), and the lower side of the bowl-shaped buckle (501) is fixedly connected to a bracket (509), which is fixedly connected to the inner wall of the separation cavity (4).

3. The flue gas treatment device for a thermal power plant according to claim 2, characterized in that, The top plate (2) has a fixed connection to the pipe hole (3) with a smoke inlet pipe (6). The upper end of the smoke inlet pipe (6) has three circumferentially spaced external smoke pipe interfaces (7), and the lower end of the smoke inlet pipe (6) is fixedly connected to a smoke inlet horn (8), which is located inside the processing chamber (1).

4. The flue gas treatment device for a thermal power plant according to claim 3, characterized in that, A top flow chamber (9) is fixedly connected above the processing chamber (1). The top flow chamber (9) is fixedly connected to the upper side of the top plate (2). Two external discharge ports are opened above the top flow chamber (9). An external discharge pipe (12) is fixedly connected to each of the two external discharge ports. A rotating frame (10) is rotatably connected between the top plate (2) and the processing chamber (1) through a bearing. A downflow fan (11) is provided on the rotating frame (10).

5. The flue gas treatment device for a thermal power plant according to claim 4, characterized in that, The processing chamber (1) is provided with multiple circumferentially spaced through holes. Atomizing nozzles (13) are fixedly connected inside the multiple through holes. The nozzles of the atomizing nozzles (13) are located inside the processing chamber (1) and tilted downwards. The tail ends of the multiple atomizing nozzles (13) are located outside the processing chamber (1) and are fixedly connected to the same annular water supply pipe (14). The annular water supply pipe (14) is fixedly connected to the outer wall of the processing chamber (1). A water injection interface (15) is provided on the annular water supply pipe (14).

6. The flue gas treatment device for a thermal power plant according to claim 5, characterized in that, The separation chamber (4) is fixedly connected to the bottom accumulation chamber (16), the bowl-shaped buckle (501) is located directly above the bottom accumulation chamber (16), and the bottom accumulation chamber (16) is provided with a material discharge port (17).

7. A flue gas treatment device for a thermal power plant according to claim 6, characterized in that, The inside of the collecting cylinder (2001) is rotatably connected to a shaft (2008) via a bearing. The outside of the shaft (2008) is fixedly connected to a spiral feeding blade (2009). The collecting cylinder (2001) is connected to the bottom accumulation cavity (16) via a discharge port (17). A drive motor (2010) is fixedly connected to the side of the collecting cylinder (2001) near the discharge port (2003). The drive motor (2010) is connected to the shaft (2008) via a coupling.

8. A method for treating flue gas from a thermal power plant, using a flue gas treatment device for a thermal power plant as described in claim 7, characterized in that, Includes the following steps: Step 1: The flue gas enters the inlet pipe (6) from the external flue pipe interface (7) and is blown downward into the treatment chamber (1) by the inlet horn (8); Step 2: The particle separation component (5) traps particles in the flue gas in the processing chamber (1). During this process, the atomizing nozzle (13) sprays the flue gas. After changing direction in the separation chamber (4), the flue gas enters the top flow chamber (9) and is discharged from the external exhaust pipe (12). Step 3: After separation, the particles flow into the bottom accumulation chamber (16) and enter the collection cylinder (2001) from the discharge port (17). The particle collection module (20) drains and discharges the particles.

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