Integrated flue gas treatment device

Abstract

The invention discloses an integrated flue gas treatment device which comprises a desulfurization device, a filter tube dust removal device, a denitration device and a fan which are sequentially connected through a pipeline, an inlet of the desulfurization device is connected with a flue gas conveying pipe and a desulfurization agent conveying pipe, an inlet of the denitration device is connected with a denitration agent conveying pipe, and the filter tube dust removal device comprises a shell. The interior of the shell comprises a spoiler and a partition plate, and the spoiler and the partition plate divide the interior of the shell into an air outlet chamber; a plurality of filter pipes are installed in the dust removal chamber from top to bottom at equal intervals, and a plurality of turbulent flow blocks are arranged between every two adjacent filter pipes; an air supply pipe is arranged in the air supply chamber, and a plurality of turbulent flow units matched with the filter pipes are arranged on the turbulent flow plate. The device is used for desulfurization, denitrification and dust removal treatment of flue gas, two stages of airflow disturbance mechanisms are designed in the filter tube dust removal device, dust on the surface of the filter tube can be effectively cleaned, the filtering effect of the filter tube is improved, and then the flue gas treatment effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to an integrated flue gas treatment device. Background Art

[0002] The integrated flue gas dust removal, desulfurization and denitrification device is a highly efficient air purification equipment, which is widely used in the purification projects of industrial kilns such as coal, gas and oil. The device effectively removes harmful substances such as sulfur dioxide, nitrogen oxides and dust in the flue gas through a series of complex physical and chemical processes. It has the characteristics of low cost, high performance and long life. In the integrated flue gas dust removal and denitrification device, the filter tube dust collector plays a vital role. The filter tube dust collector can efficiently capture and filter dust particles in the flue gas through its internal filter tube structure, thereby ensuring that the cleanliness of the flue gas meets the emission standards. However, during the long-term operation of the filter tube dust collector, a certain amount of dust will inevitably accumulate on the filter tube, which will not only increase the filtration resistance and reduce the dust removal efficiency, but also may cause wear and blockage to the filter tube, thereby affecting the normal operation of the entire flue gas dust removal and denitrification integrated device.

[0003] Therefore, in order to maintain the dust removal effect of the filter tube dust collector and extend its service life, it is essential to clean the filter tube regularly. The process of cleaning the filter tube usually includes mechanical cleaning, air flushing, solvent cleaning or water washing cleaning. Among them, the mechanical cleaning method usually uses tools such as brushes or scrapers to remove dust on the filter tube by physical friction. This method may cause wear on the surface of the filter tube, especially when the filter tube material is soft or the dust adhesion is strong, the wear is more serious, and there are cleaning dead corners; the solvent cleaning method is expensive and needs to be replaced regularly, which increases the cleaning cost. Some solvents may be harmful to the environment, and improper handling will cause environmental pollution; the water washing cleaning method requires a lot of water, which increases water resource consumption, and requires a certain amount of time to dry, and the work efficiency is low. In view of this, it is necessary to study an integrated flue gas treatment device with better dust removal effect. Summary of the invention

[0004] In order to address the deficiencies of the prior art, the purpose of the present invention is 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, the dust on the surface of the filter tube can be effectively cleaned, thereby improving the filtering effect of the filter tube and further improving the flue gas treatment effect.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: An integrated flue gas treatment device comprises 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 delivery pipe and a desulfurizer delivery pipe, the inlet of the denitrification device is connected to the denitrification delivery pipe, the filter tube dust removal device comprises a shell, the interior of the shell comprises a spoiler and a partition, the spoiler and the partition divide the interior of the shell into: an air outlet chamber; A dust removal chamber, wherein a plurality of filter tubes are installed at equal intervals from top to bottom, and a plurality of spoiler blocks are arranged between two adjacent filter tubes; An air supply chamber is provided with an air supply pipe inside the air supply chamber, and a plurality of spoiler units matching the filter tube are provided on the spoiler plate. The spoiler unit includes a plurality of inclined circular holes. The plurality of circular holes are evenly spaced and distributed in a circumferential direction with the intersection of the horizontal center line of the filter tube and the spoiler plate as the center, forming a spoiler circle.

[0006] Preferably, the aforementioned spoiler includes a front side portion, a left side portion, a right side portion, a top, a bottom, an upper slope and a lower slope, the front side portion is an arc shape protruding outward, the left side portion and the right side portion are both arc-shaped, and the height of both gradually decreases from front to back, the tails of the left side portion and the right side portion converge on the horizontal center line of the front side portion, and the upper slope and the lower slope are both planar structures.

[0007] Preferably, a plurality of spoiler blocks are evenly spaced above and below the filter tube, and the spoiler blocks in two adjacent rows are staggered.

[0008] Preferably, one side of the aforementioned air supply pipe passes through the side wall of the shell to connect to the fan, and the other side is connected to multiple first air supply branch pipes and multiple second air supply branch pipes matching the spoiler rings, and nozzles are installed at the tail ends of the first air supply branch pipe and the multiple second air supply branch pipes.

[0009] Preferably, openings matching the second air supply branch pipe are provided at both ends of the aforementioned spoiler plate and between two adjacent spoiler rings, and the second air supply branch pipe extends into the dust removal chamber through the openings.

[0010] Preferably, the inclination direction of the circular hole is in the direction of the horizontal center line of the filter tube, and the angle between the center line of the circular hole and the horizontal center line of the filter tube is 10° to 15°.

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

[0012] The benefits of the present invention are as follows: the integrated flue gas treatment device of the present 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, thereby improving the filtering effect of the filter tube; the circular holes of the spoiler unit are on the same circumference. After the gas enters the circular hole, it is forced to spray out 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-level airflow disturbance role on the gas in the dust removal chamber; when the gas flows through the spoiler block, its flow state will be significantly changed, forming a secondary flow longitudinal vortex, which strengthens the disturbance effect of the flow field and the turbulence of the gas, and plays a second-level airflow disturbance role; the two-stage airflow disturbance can significantly change the flow state of the gas, increase the relative movement 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 then improving the flue gas treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] The meanings of the reference numerals in the figure are: 1. desulfurization device, 2. filter tube dust removal device, 1201. first air supply branch, 1202. second air supply branch, 3. denitrification device, 4. fan, 5. spoiler, 501. circular hole, 502. opening, 6. partition, 7. air outlet chamber, 8. dust removal chamber, 9. filter tube, 10. spoiler 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, 1202. second air supply branch. DETAILED DESCRIPTION

[0015] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] See also Figure 1An integrated flue gas treatment device of the present invention comprises a desulfurization device 1, a filter tube dust removal device 2, a denitrification device 3 and a fan 4 which are sequentially connected through pipelines. The inlet of the desulfurization device 1 is connected to a flue gas delivery pipe and a desulfurizer delivery pipe, and the inlet of the denitrification device 3 is connected to a denitrification delivery pipe.

[0017] See also Figure 2 The filter tube dust removal device 2 includes a shell, the interior of the shell includes a spoiler 5 and a partition 6, the spoiler 5 and the partition 6 divide the interior of the shell into: an air outlet chamber 7; a dust removal chamber 8, the interior of the dust removal chamber 8 is equipped with a plurality of filter tubes 9 at equal intervals from top to bottom, and a plurality of spoiler blocks 10 are arranged between two adjacent filter tubes 9; an air supply chamber 11, the interior of the air supply chamber 11 is provided with an air supply pipe 12.

[0018] See also Figure 3 and Figure 4 The spoiler plate 5 is provided with a plurality of spoiler units matching the filter tube 9, and the spoiler units include a plurality of inclined circular holes 501, and the plurality of circular holes 501 are equally spaced in the circumferential direction with the intersection of the horizontal center line of the filter tube 9 and the spoiler plate 5 as the center, so as to form a spoiler circle. One side of the air supply pipe 12 passes through the side wall of the shell to connect to the fan 4, and the other side is connected with a plurality of first air supply branches 1201 and a plurality of second air supply branches 1202 matching the spoiler circle, and nozzles are installed at the tails of the first air supply branch 1201 and the plurality of second air supply branches 1202. Openings 502 matching the second air supply branch 1202 are provided at both ends of the spoiler plate 5 and between two adjacent spoiler circles, and the second air supply branch 1202 extends into the dust removal chamber 8 through the openings 502.

[0019] The diameter of the spoiler ring is larger than the diameter of the filter tube 9, the inclination direction of the circular hole 501 is in the direction of 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° to 15°. The circular holes 501 of the spoiler unit are on the same circumference, and 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-level airflow disturbance role on the gas in the dust removal chamber 8.

[0020] See also Figures 5 to 7, the spoiler 10 includes a front side 1001, a left side 1002, a right side 1003, a top 1004, a bottom 1005, an upper slope 1006 and a lower slope 1007, the front side 1001 is an arc shape protruding outwards, the left side 1002 and the right side 1003 are both arc-shaped, and the height of the two gradually decreases from front to back, the tails of the left side 1002 and the right side 1003 meet on the horizontal center line of the front side 1001, and the upper slope 1006 and the lower slope 1007 are both plane structures. The front side 1001 of the spoiler 10 presents an arc shape protruding outwards, which not only enhances the fluid mechanics characteristics of the spoiler 10, but also provides effective guidance for the subsequent gas flow. The left side 1002 and the right side 1003 also adopt an arc design, and the height gradually decreases from front to back, so that the gas can gradually accelerate and change the flow direction when flowing through these two sides. When the gas flows through the spoiler 10, its flow state will be significantly changed. Part of the gas will intersect with the left side 1002 and the right side 1003, and the other part will intersect with the upper inclined surface 1006 and the lower inclined surface 1007, forming a secondary flow longitudinal vortex, which strengthens the disturbance effect of the flow field and the turbulence of the gas, and plays a second-level airflow disturbance role.

[0021] A plurality of spoiler blocks 10 are evenly spaced above and below the filter tube 9, and spoiler blocks 10 in two adjacent rows are arranged in a staggered manner. The staggered arrangement can enable the secondary flow longitudinal vortex to continue to develop and enhance the airflow disturbance effect.

[0022] In order to better illustrate the present invention, the working process is specifically described 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 toward the spoiler 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-level airflow disturbance role on the gas in the dust removal chamber 8; when the gas flows through the spoiler block 10, its flow state will be significantly changed. Part of the gas intersects with the left side 1002 and the right side 1003, and the other part intersects with the upper inclined surface 1006 and the lower inclined surface 1007, forming a secondary flow longitudinal vortex, which strengthens the disturbance effect of the flow field and the turbulence of the gas, and plays a second-level airflow disturbance role.

[0023] The above shows and describes 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 form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. An integrated flue gas treatment device, comprising a desulfurization device (1), a filter tube dust removal device (2), a denitrification device (3) and a fan (4) connected in sequence through pipelines, wherein the inlet of the desulfurization device (1) is connected to a flue gas delivery pipe and a desulfurization agent delivery pipe, and the inlet of the denitrification device (3) is connected to a denitrification agent delivery pipe, characterized in that: The filter tube dust removal device (2) comprises a shell, the interior of the shell comprises a spoiler (5) and a partition (6), and the spoiler (5) and the partition (6) divide the interior of the shell into: an air outlet chamber (7); A dust removal chamber (8), wherein a plurality of filter tubes (9) are installed at equal intervals from top to bottom inside the dust removal chamber (8), and a plurality of spoiler blocks (10) are arranged between two adjacent filter tubes (9); An air supply chamber (11), wherein an air supply pipe (12) is arranged inside the air supply chamber (11), and a plurality of spoiler units matching the filter tube (9) are arranged on the spoiler plate (5), wherein the spoiler units include a plurality of inclined circular holes (501), and the plurality of circular holes (501) are distributed at equal intervals in a circumferential direction with the intersection of the horizontal center line of the filter tube (9) and the spoiler plate (5) as the center, so as to form a spoiler circle.

2. The integrated flue gas treatment device according to claim 1, characterized in that: The spoiler (10) comprises a front side portion (1001), a left side portion (1002), a right side portion (1003), a top portion (1004), a bottom portion (1005), an upper inclined surface (1006) and a lower inclined surface (1007); the front side portion (1001) is in the shape of an arc protruding outwards; the left side portion (1002) and the right side portion (1003) are both in the shape of an arc, and the heights of the two gradually decrease from front to back; the tails of the left side portion (1002) and the right side portion (1003) meet on the horizontal center line of the front side portion (1001); and the upper inclined surface (1006) and the lower inclined surface (1007) are both planar structures.

3. The integrated flue gas treatment device according to claim 2, characterized in that: A plurality of spoiler blocks (10) are evenly spaced above and below the filter tube (9), and the spoiler blocks (10) in two adjacent rows are arranged in an alternating manner.

4. The integrated flue gas treatment device according to claim 1, characterized in that: One side of the air supply pipe (12) passes through the side wall of the shell and is connected to the fan (4), and the other side 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 spoiler rings, and nozzles are installed at the tail ends of the first air supply branch pipe (1201) and the plurality of second air supply branch pipes (1202).

5. The integrated flue gas treatment device according to claim 4, characterized in that: Openings matching the second air supply branch pipe (1202) are provided at both ends of the spoiler plate (5) and between two adjacent spoiler rings, and the second air supply branch pipe (1202) extends into the dust removal chamber (8) through the openings.

6. The integrated flue gas treatment device according to claim 1, characterized in that: The inclination direction of the circular hole (501) is in the direction of 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° to 15°.

7. The integrated flue gas treatment device according to claim 1, characterized in that: The diameter of the spoiler ring is greater than the diameter of the filter tube (9).

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