Flue gas dedusting and denitration device

Abstract

The invention relates to the technical field of flue gas treatment devices, in particular to a flue gas dust removal and denitration device which comprises a bottom mounting part, an outer mounting part is arranged above the bottom mounting part, an inner mounting part is arranged in the outer mounting part, a top filtering part is arranged above the outer mounting part, and a dispersion spraying part is arranged in the outer mounting part. The inner scattering spraying frame is driven by the central control rod to rotate, and then the outer scattering spraying ring is driven by the transmission gear to rotate reversely, so that the outer scattering spraying ring and the scattering head at the bottom of the inner scattering spraying frame achieve all-directional and dead-corner-free spraying, it is ensured that the whole packing layer is fully wetted, and the situation that most existing spraying heads are connected with the inner wall of the desulfurizing tower in a fixed installation mode, and the spraying efficiency is high is effectively avoided. The problem that the whole desulfurization efficiency and the treatment effect are directly affected due to the fact that the spraying range is fixed and the internal space of the desulfurization tower cannot be completely covered due to the fact that part of flue gas easily escapes from gaps which are not covered by spraying is solved.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment equipment, specifically to a flue gas dust removal and denitrification device. Background Technology

[0002] Industrial production is the core pillar of modern socio-economic development. During operation, various combustion equipment such as kilns, boilers, and sintering machines generate large amounts of flue gas containing particulate matter, nitrogen oxides, sulfides, and other harmful impurities. The synergistic effect of sulfides and nitrogen oxides further exacerbates regional atmospheric pollution and disrupts the ecological balance of soil and water bodies. Therefore, efficient dust removal and denitrification of industrial flue gas has become one of the core tasks of industrial pollution control. Currently, in the field of industrial flue gas purification, dust removal and denitrification processes are mostly handled in separate steps using independent equipment. In terms of dust removal technology, the mainstream equipment mainly includes bag filters and electrostatic precipitators. In terms of denitrification technology, the most widely used are selective catalytic reduction (SCR) and selective non-catalytic reduction (SNR). Therefore, a dust removal and denitrification device is needed to facilitate the dust removal and denitrification treatment of flue gas.

[0003] Currently, the mainstream process for flue gas desulfurization involves spraying catalytic reducing agents through a spray device inside the desulfurization tower to remove sulfides from the flue gas. However, existing spray heads are mostly fixedly installed and connected to the inner wall of the desulfurization tower, resulting in a fixed spray range that cannot fully cover the internal space of the desulfurization tower. Consequently, some flue gas can easily escape through the gaps not covered by the spray, directly affecting the overall desulfurization efficiency and treatment effect. At the same time, in the flue gas dust removal stage, bag filter technology is mostly used, which is difficult to completely remove extremely small dust particles in the flue gas. As a result, the flue gas still carries some fine dust after treatment. If it is directly discharged into the atmosphere, it will not only fail to meet environmental emission requirements but also cause secondary pollution risks. Summary of the Invention

[0004] The purpose of this invention is to provide a flue gas dust removal and denitrification device to solve the problem mentioned in the background art that the spray heads in the desulfurization tower are mostly fixedly installed and connected to the inner wall, resulting in a fixed spray range that cannot achieve full coverage of the internal space of the desulfurization tower, thus allowing some flue gas to easily escape from the gaps not covered by the spray.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A bottom mounting portion is provided, an outer mounting portion is provided above the bottom mounting portion, the outer mounting portion includes an outer mounting cylinder, an inner mounting portion is provided inside the outer mounting portion, the inner mounting portion includes a central control rod, two packing layers are rotatably connected to the outside of the central control rod, a water filter cone is provided above the lower packing layers, a top filter portion is provided above the outer mounting portion, the top filter portion includes a top mounting cylinder, a fixing ring is fixedly connected to the inner wall of the top mounting cylinder, a replacement frame is provided inside the top mounting cylinder, locking torsion rods are rotatably connected to the four shaft holes of the replacement frame, a dispersion spray portion is provided inside the outer mounting portion, the dispersion spray portion includes a fixed inner ring, an outer dispersion spray ring is rotatably connected inside the fixed inner ring, and an inner dispersion spray frame is rotatably connected inside the outer dispersion spray ring.

[0006] Preferably, the base assembly includes a supporting base frame, an inner base frame is fixedly connected inside the supporting base frame, the top of the inner base frame has a threaded groove and a mating groove, a circulation pump is fixedly connected inside the inner base frame, the circulation pump is electrically connected to an external control component, the connector of the circulation pump is fixedly inserted into the supporting base frame, and two outer brackets are provided outside the supporting base frame, one of the outer brackets is fixedly connected to the outer wall of the supporting base frame, and circulation pipes are fixedly connected to the two outer brackets, with one end of the circulation pipe being fixedly connected to the connector of the circulation pump.

[0007] Preferably, the outer sleeve is threaded to the top of the inner base frame, another outer frame is fixedly connected to the outer wall of the outer sleeve, a recycling groove is opened inside the outer sleeve, the recycling groove can be connected to the docking groove, two inner rings are fixedly connected inside the outer sleeve, a circumferentially distributed connecting leakage hole is opened between the inner wall of the outer sleeve and the recycling groove, and an air inlet connector is fixedly connected to the outer sleeve.

[0008] Preferably, the top of the central control rod is provided with a hexagonal prism structure, both of the packing layers are fixed to the corresponding inner rings, the water filter cone is rotatably connected to the central control rod, the water filter cone is provided with an air seepage hole, the surface of the water filter cone can be connected to the connecting leakage hole, and a pushing cone is provided between the lower packing layer and the water filter cone, the pushing cone is fixed to the central control rod.

[0009] Preferably, the top-mounted cylinder is threaded to the top of the outer cylinder, and an exhaust connector is fixedly connected to the outer wall of the top-mounted cylinder. The exhaust connector can be connected to an external gas recovery assembly. The fixing ring has four circumferentially distributed locking slots, and the replacement frame has four shaft holes that can be aligned with the corresponding locking slots. A dust removal filter membrane is fixedly connected to the replacement frame.

[0010] Preferably, all four locking torsion bars can be fixedly inserted into the corresponding locking slots. A top control motor is fixedly connected to the top of the top mounting cylinder. The top control motor is electrically connected to an external control component. A drive cylinder is rotatably connected inside the top mounting cylinder. The drive cylinder is fixedly connected to the motor shaft of the top control motor and is sleeved on the top of the central control rod.

[0011] Preferably, the fixed inner ring is fixed to the bottom of the upper inner ring, and the fixed inner ring has circumferentially distributed air perforations. A water distribution plate is fixed inside the fixed inner ring, and the central control rod is rotatably connected inside the water distribution plate. A connector is fixed to the outer wall of the water distribution plate, and the connector is fixed to the other end of the circulation pipe.

[0012] Preferably, a water distribution head is fixedly connected to the bottom of the water distribution plate, a retaining tooth is provided on the inner wall of the outer spray ring, a water distribution groove is opened inside the outer spray ring, and a corresponding water distribution head is rotatably connected in the water distribution groove of the outer spray ring.

[0013] Preferably, the outer wall of the inner spray frame is provided with locking teeth, the inner spray frame is fixed to the central control rod, the inner spray frame has a water distribution groove inside, the water distribution groove of the inner spray frame is rotatably connected to the corresponding water distribution head, the bottom of the water distribution plate is rotatably connected to a transmission gear, the transmission gear is connected to the outer spray ring and the inner spray frame through locking teeth, and the bottom of the outer spray ring and the inner spray frame are both fixedly connected to a dispersing head.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the double-filler layer setting of the internal part, combined with the bidirectional rotating spray structure of the dispersion spray part, the gas to be treated is fully contacted with the spray liquid and the filler layer to form a high-efficiency gas-liquid contact interface, which can simultaneously adsorb solid impurities in the gas and absorb soluble impurities. Subsequently, the gas is filtered by liquid filtration of the water filter cone and secondary gas filtration of the dust removal filter membrane of the top filter part, forming a multi-stage filtration system of spray washing, filler adsorption and double fine filtration, which greatly improves the filtration accuracy and ensures that the cleanliness of the discharged gas meets the standards. This effectively avoids the problem that most bag dust collection technology is used in the flue gas dust removal process, which is difficult to completely remove the extremely small dust particles in the flue gas, resulting in the flue gas still carrying some fine dust after treatment.

[0015] 2. The dispersion spray section adopts a nested rotating structure of a fixed inner ring, an outer dispersion spray ring, and an inner dispersion spray frame. The inner dispersion spray frame is driven to rotate by a central control rod, and then the outer dispersion spray ring is driven to rotate in the opposite direction by a transmission gear. This allows the dispersion heads at the bottom of the outer dispersion spray ring and the inner dispersion spray frame to achieve all-round, dead-angle-free spraying, ensuring that the entire packing layer is fully wetted. This effectively avoids the problem that existing spray heads are mostly fixedly installed and connected to the inner wall of the desulfurization tower, resulting in a fixed spray range that cannot achieve full coverage of the internal space of the desulfurization tower. Consequently, some flue gas can easily escape from the gaps not covered by the spray, directly affecting the overall desulfurization efficiency and treatment effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional assembly structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional assembly structure from below according to the present invention; Figure 3 This is an exploded structural diagram of the present invention; Figure 4 This is an exploded bottom view schematic diagram of the structure of the present invention; Figure 5 This is a partial cross-sectional view of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A is shown. Figure 7 For the present invention Figure 5 A schematic diagram of the enlarged structure of section B is shown. Figure 8 This is a schematic diagram of the assembly structure of the bottom mounting part of the present invention; Figure 9 This is a schematic diagram of the external assembly structure of the present invention; Figure 10 This is a schematic diagram of the internal assembly structure of the present invention; Figure 11 This is a schematic diagram of the top filter assembly structure of the present invention; Figure 12 This is a schematic diagram of the assembly structure of the dispersion spray section of the present invention.

[0017] In the attached diagram, the components represented by each number are as follows: 1. Base assembly; 101. Support base frame; 102. Inner base frame; 103. Connecting groove; 104. Circulating pump; 105. Outer frame; 106. Circulation pipe; 2. Outer assembly; 201. Outer cylinder; 202. Recovery tank; 203. Inner ring; 204. Connecting leak hole; 205. Air inlet connector; 3. Inner assembly; 301. Central control rod; 302. Packing layer; 303. Water filter cone; 304. Air thrust cone; 4. Top filter assembly; 40 1. Top mounting cylinder; 402. Exhaust connector; 403. Fixing ring; 404. Locking slot; 405. Replacement frame; 406. Locking torsion bar; 407. Top control motor; 408. Drive cylinder; 5. Dispersing spray section; 501. Fixing inner ring; 502. Air seepage hole; 503. Water distribution plate; 504. Connecting joint; 505. Water distribution head; 506. Outer dispersing spray ring; 507. Inner dispersing spray frame; 508. Transmission gear; 509. Dispersing head. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a technical solution: such as Figure 1 - Figure 12 The flue gas dust removal and denitrification device shown includes a bottom mounting part 1, an outer mounting part 2 above the bottom mounting part 1, an outer mounting part 2 including an outer mounting cylinder 201, an inner mounting part 3 inside the outer mounting part 2, an inner mounting part 3 including a central control rod 301, two packing layers 302 rotatably connected to the outside of the central control rod 301, a water filter cone 303 above the lower packing layer 302, a top filter part 4 above the outer mounting part 2, a top filter part 4 including a top mounting cylinder 401, a fixing ring 403 fixedly connected to the inner wall of the top mounting cylinder 401, a replacement frame 405 inside the top mounting cylinder 401, locking torsion rods 406 rotatably connected to the four shaft holes of the replacement frame 405, a dispersion spray part 5 inside the outer mounting part 2, a dispersion spray part 5 including a fixed inner ring 501, an outer dispersion spray ring 506 rotatably connected inside the fixed inner ring 501, and an inner dispersion spray frame 507 rotatably connected inside the outer dispersion spray ring 506.

[0020] The base unit 1 includes a support base frame 101, an inner base frame 102 is fixedly connected inside the support base frame 101, the top of the inner base frame 102 is provided with a threaded groove and a mating groove 103, a circulation pump 104 is fixedly connected inside the inner base frame 102, the circulation pump 104 is electrically connected to an external control component, the connector of the circulation pump 104 is fixedly inserted into the support base frame 101, two outer brackets 105 are provided outside the support base frame 101, one outer bracket 105 is fixedly connected to the outer wall of the support base frame 101, and a circulation pipe 106 is fixedly connected to the two outer brackets 105, one end of the circulation pipe 106 is fixedly connected to the connector of the circulation pump 104.

[0021] The outer casing 201 is threaded to the top of the inner casing base 102. Another outer casing 105 is fixed to the outer wall of the outer casing 201. A recycling groove 202 is opened inside the outer casing 201. The recycling groove 202 can be connected to the docking groove 103. Two inner casing rings 203 are fixed inside the outer casing 201. A circularly distributed connecting leakage hole 204 is opened between the inner wall of the outer casing 201 and the recycling groove 202. An air inlet connector 205 is fixed to the outer casing 201.

[0022] The top of the central control rod 301 is provided with a hexagonal prism structure. Two packing layers 302 are fixed to the corresponding inner rings 203. The water filter cone 303 is rotatably connected to the central control rod 301. The water filter cone 303 is provided with air leakage holes. The surface of the water filter cone 303 can be connected to the connecting leakage hole 204. A pusher cone 304 is provided between the lower packing layer 302 and the water filter cone 303. The pusher cone 304 is fixed to the central control rod 301.

[0023] The top-mounted cylinder 401 is threaded to the top of the outer cylinder 201. An exhaust connector 402 is fixedly connected to the outer wall of the top-mounted cylinder 401. The exhaust connector 402 can be connected to the external gas recovery assembly. The fixing ring 403 has four circumferentially distributed locking slots 404. The replacement frame 405 has four shaft holes that can be aligned with the corresponding locking slots 404. A dust removal filter membrane is fixedly connected to the replacement frame 405.

[0024] All four locking torsion rods 406 can be fixedly inserted into the corresponding locking slots 404. A top control motor 407 is fixedly connected to the top of the top mounting cylinder 401. The top control motor 407 is electrically connected to the external control components. A drive cylinder 408 is rotatably connected inside the top mounting cylinder 401. The drive cylinder 408 is fixedly connected to the motor shaft of the top control motor 407 and is sleeved on the top of the central control rod 301.

[0025] The fixed inner ring 501 is fixed to the bottom of the upper inner ring 203. The fixed inner ring 501 has circumferentially distributed air seepage holes 502. The water distribution plate 503 is fixed inside the fixed inner ring 501. The central control rod 301 is rotatably connected inside the water distribution plate 503. The butt joint 504 is fixed to the outer wall of the water distribution plate 503. The butt joint 504 is fixed to the other end of the circulation pipe 106.

[0026] The bottom of the water distribution plate 503 is fixedly connected to a water distribution head 505. The inner wall of the outer spray ring 506 is provided with a retaining tooth. The interior of the outer spray ring 506 is provided with a water distribution groove. The corresponding water distribution head 505 is rotatably connected in the water distribution groove of the outer spray ring 506.

[0027] The inner spray frame 507 has a retaining tooth on its outer wall and is fixed to the central control rod 301. The inner spray frame 507 has a water distribution groove inside and a corresponding water distribution head 505 is rotatably connected in the water distribution groove. The bottom of the water distribution plate 503 is rotatably connected to a transmission gear 508. The transmission gear 508 is connected to the outer spray ring 506 and the inner spray frame 507 through the retaining tooth. The bottom of the outer spray ring 506 and the inner spray frame 507 are both fixed with a dispersing head 509.

[0028] Working principle: After the device is assembled, the gas to be treated is introduced into the equipment through the air inlet 205 on the outer cylinder 201. After entering the bottom of the outer cylinder 201, the gas flows upward. When it passes through the packing layer 302 below, it is evenly dispersed by the air-pushing cone 304 on the central control rod 301, so that the gas can fully contact the wetted packing layer 302. The packing layer 302 adsorbs and filters impurities in the gas. Then, the circulation pump 104 is started. The circulation pump 104 delivers the liquid to the inside of the water distribution plate 503 through the circulation pipe 106. The liquid in the water distribution plate 503 passes through the water distribution head 50. 5. The water flows into the distribution tanks of the outer spray ring 506 and the inner spray frame 507 respectively, and is finally dispersed and sprayed onto the water filter cone 303 below through the bottom dispersion head 509, so as to fully wet the packing layer 302 below, preparing for gas filtration; at the same time, the top control motor 407 is started, which drives the drive cylinder 408 to rotate, and the drive cylinder 408 drives the central control rod 301 to rotate synchronously. When the central control rod 301 rotates, it drives the inner spray frame 507 above it to rotate synchronously. The inner spray frame 507 drives the transmission gear 508 to rotate through the locking teeth, and the transmission gear 508 further drives... The external spray ring 506 rotates in the opposite direction, causing the external spray ring 506 and the internal spray frame 507 to rotate in opposite directions. The dispersing head 509 at its bottom sprays the liquid evenly onto the water filter cone 303, forming a uniform liquid film. When the gas to be treated passes through the liquid film and the packing layer 302, soluble impurities in the gas are absorbed by the liquid, and solid impurities are adsorbed by the packing layer 302, achieving deep filtration of the gas. The sprayed liquid flows downward along the water filter cone 303, and then flows into the recovery tank 202 through the connecting hole 204 on the outer cylinder 201, and then enters the circulation tank through the docking tank 103. The ring pump 104, in conjunction with the external liquid purification and filtration assembly, allows the purified liquid to be transported back to the water distribution plate 503 via the circulation pipe 106, realizing the recycling of the liquid. Meanwhile, the gas, after being filtered by the packing layer 302, continues to flow upward, passes through the air permeation holes on the water filter cone 303, and enters the top-mounted cylinder 401. It undergoes secondary filtration through the dust removal filter membrane on the replacement frame 405 to remove residual fine impurities in the gas, ensuring gas cleanliness. The filtered clean gas is then transported to the external gas recovery assembly through the exhaust connector 402 on the top-mounted cylinder 401, completing the entire gas filtration process.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas dedusting and denitration device comprising a bottom-mounted part (1), characterized in that: The upper portion of the bottom-mounted part (1) is provided with an outer-mounted part (2), the outer-mounted part (2) comprises an outer-mounted cylinder (201), the inside of the outer-mounted part (2) is provided with an inner-mounted part (3), the inner-mounted part (3) comprises a central control rod (301), the outside of the central control rod (301) is rotatably connected with two filler layers (302), the upper portion of the lower filler layer (302) is provided with a water filter cone cylinder (303), the upper portion of the outer-mounted part (2) is provided with a top filter part (4), the top filter part (4) comprises a top-mounted cylinder (401), the inner wall of the top-mounted cylinder (401) is fixedly connected with a fixed ring (403), the inside of the top-mounted cylinder (401) is provided with a replacement frame (405), the four shaft holes of the replacement frame (405) are rotatably connected with locking torsion rods (406), the inside of the outer-mounted part (2) is provided with a dispersed spraying part (5), the dispersed spraying part (5) comprises a fixed inner ring (501), the inside of the fixed inner ring (501) is rotatably connected with an outer dispersed spraying ring (506), the inside of the outer dispersed spraying ring (506) is rotatably connected with an inner dispersed spraying frame (507).

2. A device for dedusting and desulfurizing flue gas according to claim 1, characterized in that: The bottom-mounted part (1) comprises a supporting bottom frame (101), the inside of the supporting bottom frame (101) is fixedly connected with an inner-mounted bottom frame (102), the top of the inner-mounted bottom frame (102) is provided with a threaded groove, the top of the inner-mounted bottom frame (102) is provided with a butt joint groove (103), the inside of the inner-mounted bottom frame (102) is fixedly connected with a circulating pump (104), the circulating pump (104) is electrically connected with an external control assembly, the connecting head of the circulating pump (104) is fixedly inserted into the supporting bottom frame (101), the outside of the supporting bottom frame (101) is provided with two outer fixed frames (105), one of the outer fixed frames (105) is fixedly connected to the outer wall of the supporting bottom frame (101), the two outer fixed frames (105) are fixedly connected with a circulating pipe (106), one end of the circulating pipe (106) is fixedly connected with the connecting head of the circulating pump (104).

3. A device for dedusting and desulfurizing flue gas according to claim 2, characterized in that: The outer-mounted cylinder (201) is threadedly connected to the top of the inner-mounted bottom frame (102), the outer wall of the outer-mounted cylinder (201) is fixedly connected with another outer fixed frame (105), the inside of the outer-mounted cylinder (201) is provided with a recycling groove (202), the recycling groove (202) is connectable with the butt joint groove (103), the inside of the outer-mounted cylinder (201) is fixedly connected with two inner-mounted rings (203), the inner wall of the outer-mounted cylinder (201) and the recycling groove (202) are provided with circumferentially distributed communication leakage holes (204), the outer-mounted cylinder (201) is fixedly connected with an air inlet connector (205).

4. A device for dedusting and desulfurizing flue gas according to claim 3, characterized in that: The top of the central control rod (301) is provided with a hexagonal structure, both of the filler layers (302) are fixedly connected to the corresponding inner mounting ring (203), the water filter cone cylinder (303) is rotationally connected to the central control rod (301), the water filter cone cylinder (303) is provided with gas permeation holes, the surface of the water filter cone cylinder (303) is connectable with the communication leakage hole (204), and the lower filler layer (302) is provided with a gas pushing cone block (304) between the water filter cone cylinder (303).

5. A device for dedusting and desulfurizing flue gas according to claim 3, characterized in that: The top-mounted cylinder (401) is threadedly connected to the top of the outer mounting cylinder (201), the outer wall of the top-mounted cylinder (401) is fixedly connected with an exhaust joint (402), the exhaust joint (402) is connectable with an external gas recovery assembly, the fixing ring (403) is provided with four circumferentially distributed locking insertion slots (404), the replacement frame (405) is provided with four shaft holes alignable with the corresponding locking insertion slots (404), and the replacement frame (405) is fixedly connected with a dust removal filter membrane.

6. A device for dedusting and detoxifying flue gases according to claim 5, characterized in that: The four locking torsion rods (406) are fixedly inserted into the corresponding locking insertion slots (404), the top of the top-mounted cylinder (401) is fixedly connected with a top control motor (407), the top control motor (407) is electrically connected with an external control assembly, the top-mounted cylinder (401) is rotationally connected with a driving cylinder (408), the driving cylinder (408) is fixedly connected to the motor shaft of the top control motor (407), and the driving cylinder (408) is sleeved on the top of the central control rod (301).

7. A device for dedusting and desulfurizing flue gas according to claim 3, characterized in that: The fixed inner ring (501) is fixedly connected to the bottom of the upper inner mounting ring (203), the fixed inner ring (501) is provided with circumferentially distributed gas permeation through holes (502), the fixed inner ring (501) is fixedly connected with a water distribution plate (503) inside, the water distribution plate (503) is rotationally connected with the central control rod (301) inside, the outer wall of the water distribution plate (503) is fixedly connected with a butt joint (504), and the butt joint (504) is fixedly connected with the other end of the circulating pipe (106).

8. A device for dedusting and desulfurizing flue gas according to claim 7, characterized in that: The bottom of the water distribution plate (503) is fixedly connected with a water distribution head (505), the inner wall of the outer scattering spray ring (506) is provided with a clamping tooth, the inner wall of the outer scattering spray ring (506) is provided with a water distribution groove, and the water distribution groove of the outer scattering spray ring (506) is rotationally connected with the corresponding water distribution head (505).

9. A device for dedusting and desulfurizing flue gas according to claim 8, characterized in that: The outer wall of the inner spray frame (507) is provided with a tooth, the inner spray frame (507) is fixed to the central control rod (301), the inner spray frame (507) is provided with a water distribution groove, the water distribution groove of the inner spray frame (507) is rotatably connected with the corresponding water distribution head (505), the bottom of the water distribution plate (503) is rotatably connected with a transmission gear (508), the transmission gear (508) is connected with the outer spray ring (506) and the inner spray frame (507) through the tooth, and the outer spray ring (506) and the bottom of the inner spray frame (507) are both fixedly connected with a dispersion head (509).

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