Integrated flue gas treatment device

Abstract

The application discloses an integrated flue gas treatment device, which comprises a desulfurization device, a filter pipe dust removal device, a denitration device and a fan which are sequentially connected through pipelines, the inlet of the desulfurization device is connected with a flue gas conveying pipe and a desulfurizer conveying pipe, the inlet of the denitration device is connected with a denitration agent conveying pipe, the filter pipe dust removal device comprises a shell, the inside of the shell comprises a spoiler plate and a partition plate, the spoiler plate and the partition plate divide the inside of the shell into an air outlet chamber, a dust removal chamber and an air supply chamber, a plurality of filter pipes are installed in the dust removal chamber at equal intervals from top to bottom, a plurality of spoiler blocks are arranged between two adjacent filter pipes, an air supply pipe is arranged in the air supply chamber, and a plurality of spoiler units matched with the filter pipes are arranged on the spoiler plate. The application is used for desulfurization and denitration dust removal treatment of flue gas, a two-stage airflow disturbance mechanism is designed in the filter pipe dust removal device, dust on the surface of the filter pipe can be effectively cleaned, the filtering effect of the filter pipe is improved, and the flue gas treatment effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of flue gas treatment technology, and specifically relates to an integrated flue gas treatment device. Background Technology

[0002] The integrated flue gas dust removal, desulfurization, and denitrification unit is a highly efficient air purification device widely used in purification projects for industrial kilns burning coal, gas, or oil. This unit effectively removes harmful substances such as sulfur dioxide, nitrogen oxides, and dust from flue gas through a series of complex physical and chemical processes, featuring low cost, high performance, and long service life. In this integrated flue gas dust removal and denitrification unit, the filter tube dust collector plays a crucial role. Through its internal filter tube structure, the filter tube dust collector efficiently captures and filters dust particles in the flue gas, ensuring that the flue gas cleanliness meets emission standards. However, during long-term operation, a certain amount of dust inevitably accumulates on the filter tubes. This not only increases filtration resistance and reduces dust removal efficiency but may also cause wear and blockage of the filter tubes, thus affecting the normal operation of the entire integrated flue gas dust removal and denitrification unit.

[0003] Therefore, to maintain the dust removal efficiency of filter tube dust collectors and extend their service life, regular cleaning of the filter tubes is essential. The cleaning process typically includes mechanical cleaning, air washing, solvent cleaning, or water washing. Mechanical cleaning usually uses tools such as brushes or scrapers to remove dust from the filter tubes through physical friction. This method may cause wear on the filter tube surface, especially when the filter tube material is soft or the dust adhesion is strong, and it also creates cleaning dead zones. Solvent cleaning is costly and requires regular replacement, increasing cleaning costs. Some solvents may be harmful to the environment, and improper handling can lead to environmental pollution. Water washing requires a large amount of water, increasing water consumption, and requires a certain amount of time to dry, resulting in low efficiency. Therefore, it is necessary to research an integrated flue gas treatment device with better dust removal performance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an integrated flue gas treatment device for desulfurization, denitrification, and dust removal of flue gas. By designing a two-stage airflow disturbance mechanism in the filter tube dust removal device, dust on the surface of the filter tube can be effectively cleaned, improving the filtration effect of the filter tube and thus enhancing the flue gas treatment effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An integrated flue gas treatment device includes a desulfurization device, a filter tube dust removal device, a denitrification device, and a fan connected in sequence through pipelines. The inlet of the desulfurization device is connected to a flue gas conveying pipe and a desulfurizing agent conveying pipe. The inlet of the denitrification device is connected to a denitrification agent conveying pipe. The filter tube dust removal device includes a shell, and the interior of the shell includes a baffle plate and a partition plate, which divide the interior of the shell into an air outlet chamber. The dust removal chamber contains multiple filter tubes installed at equal intervals from top to bottom, with multiple turbulence blocks placed between adjacent filter tubes. The air supply chamber contains an air supply duct. The baffle plate has multiple baffle units that match the filter tube. Each baffle unit includes multiple inclined circular holes. These holes are evenly distributed in a circular direction around the intersection of the horizontal center line of the filter tube and the baffle plate, forming a baffle ring.

[0006] Preferably, the aforementioned spoiler includes a front part, a left part, a right part, a top part, a bottom part, an upper slope and a lower slope. The front part is an outwardly protruding arc shape, and the left and right parts are both arc shapes, with their heights gradually decreasing from front to back. The tails of the left and right parts converge on the horizontal center line of the front part, and the upper and lower slopes are both planar structures.

[0007] Preferably, multiple baffles are evenly spaced above and below the aforementioned filter tube, and the baffles in adjacent rows are arranged in an alternating pattern.

[0008] Preferably, one side of the aforementioned air supply duct is connected to a plurality of first air supply branch pipes and a plurality of second air supply branch pipes that match the turbulence ring, and nozzles are installed at the tail ends of the first air supply branch pipes and the plurality of second air supply branch pipes.

[0009] Preferably, the aforementioned baffle plate has openings at both ends and between two adjacent baffle rings that match the second air supply branch pipe, and the second air supply branch pipe extends into the dust removal chamber through the openings.

[0010] Preferably, the aforementioned circular hole is inclined toward the horizontal centerline of the filter tube, and the angle between the centerline of the circular hole and the horizontal centerline of the filter tube is 10°~15°.

[0011] Preferably, the diameter of the aforementioned turbulence ring is larger than the diameter of the filter tube.

[0012] The advantages of this invention are as follows: The integrated flue gas treatment device of this invention can be used for desulfurization, denitrification and dust removal of flue gas. By supplying air to the filter tube dust removal device, the dust on the surface of the filter tube can be effectively cleaned, improving the filtration effect of the filter tube. The circular holes of the turbulence unit are on the same circumference. After the gas enters the circular hole, it is forced to be ejected along the axial direction of the circular hole. Due to its axial inclination, the gas will collide with the hole wall in the circular hole, thereby forming a strong rotating airflow, which can play a first-stage airflow disturbance role on the gas in the dust removal chamber. When the gas flows through the turbulence block, its flow state will be significantly changed, forming a secondary longitudinal vortex, which strengthens the disturbance effect of the flow field and the turbulence of the gas, playing a second-stage airflow disturbance role. The two-stage airflow disturbance can significantly change the flow state of the gas, increase the relative motion speed between the gas and the filter tube wall, thereby enhancing the impact and stripping effect of the gas on the dust particles on the filter tube wall, effectively improving the dust removal effect, and thus improving the flue gas treatment effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the filter tube dust removal device; Figure 3 This is a schematic diagram of the spoiler structure; Figure 4 This is a schematic diagram of the circular holes in the spoiler; Figure 5 This is a top view of the spoiler block; Figure 6 This is the left view of the spoiler block; Figure 7 This is the front view of the spoiler block.

[0014] The meanings of the reference numerals in the figure are as follows: 1. Desulfurization device; 2. Filter tube dust removal device; 1201. First air supply branch pipe; 1202. Second air supply branch pipe; 3. Denitrification device; 4. Fan; 5. Baffle plate; 501. Circular hole; 502. Opening; 6. Baffle plate; 7. Air outlet chamber; 8. Dust removal chamber; 9. Filter tube; 10. Baffle block; 1001. Front side; 1002. Left side; 1003. Right side; 1004. Top; 1005. Bottom; 1006. Upper slope; 1007. Lower slope; 11. Air supply chamber; 12. Air supply pipe; 1201. First air supply branch pipe; 1202. Second air supply branch pipe. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] See Figure 1The present invention provides an integrated flue gas treatment device, comprising a desulfurization device 1, a filter dust removal device 2, a denitrification device 3, and a fan 4 connected in sequence by pipelines. The inlet of the desulfurization device 1 is connected to a flue gas conveying pipe and a desulfurizing agent conveying pipe, and the inlet of the denitrification device 3 is connected to a denitrification agent conveying pipe.

[0017] See Figure 2 The filter tube dust removal device 2 includes a housing, the interior of which includes a baffle plate 5 and a partition plate 6, which divide the interior of the housing into: an air outlet chamber 7; a dust removal chamber 8, in which multiple filter tubes 9 are installed at equal intervals from top to bottom, and multiple baffle blocks 10 are arranged between two adjacent filter tubes 9; and an air supply chamber 11, in which an air supply pipe 12 is arranged.

[0018] See Figure 3 and Figure 4 The baffle plate 5 is equipped with multiple baffle units that match the filter tube 9. Each baffle unit includes multiple inclined circular holes 501, which are evenly spaced circumferentially around the intersection of the horizontal centerline of the filter tube 9 and the baffle plate 5, forming a baffle ring. One side of the air supply duct 12 passes through the side wall of the casing and connects to the fan 4. The other side is connected to multiple first air supply branch pipes 1201 and multiple second air supply branch pipes 1202 that match the baffle rings. Nozzles are installed at the tail ends of both the first air supply branch pipes 1201 and the multiple second air supply branch pipes 1202. Openings 502 matching the second air supply branch pipes 1202 are provided at both ends of the baffle plate 5 and between adjacent baffle rings. The second air supply branch pipes 1202 extend into the dust collection chamber 8 through the openings 502.

[0019] The diameter of the turbulence ring is larger than the diameter of the filter tube 9. The inclination direction of the circular hole 501 is towards the horizontal centerline of the filter tube 9, and the angle between the centerline of the circular hole 501 and the horizontal centerline of the filter tube 9 is 10°~15°. The circular holes 501 of the turbulence unit are on the same circumference. After the gas enters the circular hole 501, it is forced to be ejected along the axial direction of the circular hole 501. Due to its axial inclination, the gas will collide with the hole wall in the circular hole 501, thereby forming a strong rotating airflow, which can play a first-stage airflow disturbance role for the gas in the dust removal chamber 8.

[0020] See Figures 5-7The turbulence block 10 includes a front portion 1001, a left portion 1002, a right portion 1003, a top portion 1004, a bottom portion 1005, an upper inclined surface 1006, and a lower inclined surface 1007. The front portion 1001 is an outwardly convex arc shape. The left portion 1002 and the right portion 1003 are also arc-shaped, and their heights gradually decrease from front to back. The tails of the left portion 1002 and the right portion 1003 converge on the horizontal center line of the front portion 1001. The upper inclined surface 1006 and the lower inclined surface 1007 are both planar structures. The outwardly convex arc shape of the front portion 1001 of the turbulence block 10 not only enhances the hydrodynamic characteristics of the turbulence block 10 but also provides effective guidance for the subsequent gas flow. The left portion 1002 and the right portion 1003 also adopt an arc-shaped design, and their heights gradually decrease from front to back, allowing the gas to gradually accelerate and change its flow direction when flowing over these two sides. When the gas flows through the turbulence block 10, its flow state will be significantly changed. Part of the gas will converge through the left side 1002 and the right side 1003, and another part will converge through the upper slope 1006 and the lower slope 1007, forming a secondary longitudinal vortex, which will enhance the disturbance effect of the flow field and the turbulence of the gas, and play a second-stage airflow disturbance role.

[0021] Multiple turbulence blocks 10 are evenly spaced above and below the filter tube 9, with adjacent rows of turbulence blocks 10 arranged in an alternating pattern. This alternating arrangement allows the longitudinal vortex of the secondary flow to continue to develop, enhancing the airflow disturbance effect.

[0022] To better illustrate the present invention, its working process is described in detail below: When the filter tube 9 needs to be cleaned, high-pressure gas is introduced into the air supply pipe 12. Part of the gas enters the dust removal chamber 8 through the second air supply branch pipe 1202, and the other part of the gas is sprayed towards the turbulence ring through the first air supply branch pipe 1201. After the gas enters the circular hole 501, it is forced to be ejected along the axial direction of the circular hole 501. Due to its axial inclination, the gas will collide with the hole wall in the circular hole 501, thereby forming a strong rotating airflow, which can play a first-stage airflow disturbance role for the gas in the dust removal chamber 8. When the gas flows through the turbulence block 10, its flow state will be significantly changed. Part of the gas converges through the left side 1002 and the right side 1003, and the other part converges through the upper inclined surface 1006 and the lower inclined surface 1007, forming a secondary longitudinal vortex, which strengthens the disturbance effect of the flow field and the turbulence of the gas, playing a second-stage airflow disturbance role.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An integrated flue gas treatment device, comprising a desulfurization device (1), a filter dust removal device (2), a denitrification device (3), and a fan (4) connected sequentially by pipelines, wherein the inlet of the desulfurization device (1) is connected to a flue gas conveying pipe and a desulfurizing agent conveying pipe, and the inlet of the denitrification device (3) is connected to a denitrification agent conveying pipe, characterized in that, The filter tube dust removal device (2) includes a housing, the interior of which includes a baffle plate (5) and a partition plate (6), which divide the interior of the housing into an air outlet chamber (7). The dust removal chamber (8) has multiple filter tubes (9) installed at equal intervals from top to bottom inside the dust removal chamber (8), and multiple turbulence blocks (10) are arranged between two adjacent filter tubes (9). The turbulence block (10) includes a front part (1001), a left part (1002), a right part (1003), a top (1004), a bottom (1005), an upper slope (1006), and a lower slope (1007). The front part (1001) is an outwardly protruding arc shape. The left part (1002) and the right part (1003) are both arc shapes, and their heights gradually decrease from front to back. The tails of the left part (1002) and the right part (1003) converge on the horizontal center line of the front part (1001). The upper slope (1006) and the lower slope (1007) are both planar structures. An air supply chamber (11) is provided with an air supply pipe (12) inside the air supply chamber (11). The baffle plate (5) is provided with a plurality of baffle units that match the filter pipe (9). The baffle unit includes a plurality of inclined circular holes (501). The plurality of circular holes (501) are distributed at equal intervals in the circumferential direction with the intersection of the horizontal center line of the filter pipe (9) and the baffle plate (5) as the center, forming a baffle ring. One side of the air supply pipe (12) is connected to a plurality of first air supply branch pipes (1201) and a plurality of second air supply branch pipes (1202) that match the baffle rings. The tail ends of the first air supply branch pipes (1201) and the plurality of second air supply branch pipes (1202) are all equipped with nozzles. Both ends of the baffle plate (5) and between two adjacent baffle rings are provided with openings that match the second air supply branch pipes (1202). The second air supply branch pipes (1202) extend into the dust removal chamber (8) through the openings.

2. The integrated flue gas treatment device according to claim 1, characterized in that, Multiple turbulence blocks (10) are evenly spaced above and below the filter tube (9), and the turbulence blocks (10) in adjacent rows are staggered.

3. The integrated flue gas treatment device according to claim 1, characterized in that, The inclination direction of the circular hole (501) is toward the horizontal center line of the filter tube (9), and the angle between the center line of the circular hole (501) and the horizontal center line of the filter tube (9) is 10°~15°.

4. The integrated flue gas treatment device according to claim 1, characterized in that, The diameter of the turbulence ring is larger than the diameter of the filter tube (9).

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