A flue gas desulfurization device for calcine sludge

Abstract

This invention relates to the field of industrial flue gas treatment machinery technology, and specifically to a flue gas desulfurization device for roasting tailings. The cyclone dust collector cleaning assembly is installed at the other end of the cyclone dust collector body, and the bag filter assembly is installed at the end of the cooling pipe. After the flue gas enters the bag filter body through the inlet, it undergoes deep filtration through the filter bags inside the bag cylinder. The filter bags are arranged in a 4×4 matrix. After the filter bags have been filtering for a period of time, a large amount of dust will adhere to the inner wall of the filter bags. At this time, the hydraulic rod drives the dust collector plate to move precisely downward in the vertical direction through the traction rod and connecting bracket. Subsequently, high-pressure gas provides instantaneous pulse airflow to the annular nozzle through the air supply pipe in conjunction with the air supply solenoid valve. As the hydraulic rod descends, each filter bag is cleaned directionally from top to bottom. The airflow impacts the inner wall of the filter bag, causing the adhered dust to fall off the inner wall of the filter bag and be discharged from the ash discharge port below.

Description

Technical Field

[0001] This invention relates to the field of industrial flue gas treatment machinery technology, and more specifically, to a flue gas desulfurization device for roasting tailings. Background Technology

[0002] Roasting tailings are solid waste residues remaining after ores (such as gold, lithium, and zinc ores) have been roasted at high temperatures to extract valuable metals. They contain impurities such as sulfides and heavy metals. Roasting tailings flue gas desulfurization refers to the treatment of flue gas containing sulfur dioxide generated during roasting. Through chemical reactions with desulfurizing agents such as lime / sodium-based desulfurizers, sulfur dioxide is removed and emissions meet standards.

[0003] A search revealed that the patent application document with publication number "CN210009827U" mentions "a novel desulfurization device for kiln tail flue gas, comprising a slurry preparation tank and an absorption tower. The slurry preparation tank is equipped with stirring blades. One side of the absorption tower has an overflow pipe to maintain the internal water level, and the other side has a flue gas inlet pipe extending into the absorption tower. The bottom of the absorption tower has a circulation tank containing multiple stirrers. Above the circulation tank are three spray layers, each with a different head. The spray layers are connected to the outside of the absorption tower via spray pipes, all of which are connected to circulation pumps. The circulation pumps are connected to the circulation tank via water pipes. A demister is located above the spray layers, and the absorption tower has an outlet at the top." The advantages of this utility model are: high utilization rate of the desulfurization absorbent, applicability to any flue gas desulfurization, desulfurization efficiency reaching 99.9%, and no limitation on production line scale, especially its advantages are more pronounced in large-scale production lines.

[0004] However, most existing flue gas desulfurization devices for roasted tailings use high-temperature roasting for desulfurization. After high-temperature roasting, the flue gas generated from the roasted tailings flows through pipelines into the desulfurization structure. Before flowing into the desulfurization structure, a large amount of dust contained in the flue gas needs to be filtered out. When the flue gas passes through the cyclone dust collector, a large amount of dust will adhere to the inner wall of the dust collector. After a large amount of dust adheres to the inner wall of the dust collector, it needs to be cleaned regularly, which increases maintenance costs. At the same time, the large amount of heat carried by the flue gas is mostly cooled by a single cooling method, which has low cooling efficiency. Furthermore, the final bag filter structure has a small filtration area, and after a period of filtration, the inside of the filter bags is easily clogged by dust, requiring regular cleaning, which leads to a decrease in filtration efficiency.

[0005] Based on this, the present invention discloses a flue gas desulfurization device for roasting tailings. Summary of the Invention

[0006] To address the problems of small filtration area and easy clogging of the filter bags by dust after a period of filtration, which necessitates regular cleaning and leads to reduced filtration efficiency, this invention provides a flue gas desulfurization device for roasting tailings. It includes a cyclone dust collector body, one end of which is connected to a dust collector inlet, and also includes: A flue gas inlet assembly is installed on the outside of the dust collector inlet. The flue gas inlet assembly includes a flue gas guide pipe installed on the outside of the dust collector inlet and a flue gas guide hood disposed at the end of the flue gas guide pipe. A cyclone dust collector cleaning assembly is installed at the other end of the cyclone dust collector body. The cyclone dust collector cleaning assembly includes a rotary motor installed at the bottom inner side of the cyclone dust collector body, a wall scraper installed inside the cyclone dust collector body, a dust collector outlet installed at the top of the cyclone dust collector body, and a cooling pipe installed outside the dust collector outlet. A bag filter assembly, wherein the bag filter assembly is installed at the end of the cooling pipe.

[0007] Because a large amount of dust contained in the flue gas needs to be filtered out before it flows into the desulfurization structure, and a large amount of dust will adhere to the inner wall of the cyclone dust collector when the flue gas passes through it, the large amount of dust adhering to the inner wall of the dust collector needs to be cleaned regularly, which increases maintenance costs. This technical solution adopts the following: the wall scraper is fixedly connected to the output shaft of the rotary motor, a supporting column is connected in the middle of the wall scraper, an ash storage bin is welded to the bottom of the cyclone dust collector body, an ash storage box is installed inside the ash storage bin, a dust collector outlet is installed at the top of the cyclone dust collector body, and the outer surface of the wall scraper is tightly fitted to the conical inner wall of the cyclone dust collector body, as a further improvement to this technical solution.

[0008] Based on this, the large amount of heat carried in the flue gas is mostly cooled by a single cooling method, which has low cooling efficiency. To address this, a water-cooled jacket is installed on the outside of the cooling pipe. One end of the water-cooled jacket is connected to a water inlet, and the other end is connected to a water outlet. There is a hollow layer between the water-cooled jacket and the cooling pipe, and a cooling water circulation channel is formed through the water inlet and the water outlet.

[0009] The outer side of each water-cooled sleeve is welded with heat dissipation fins, which are evenly distributed and made of aluminum alloy, as a further improvement to this technical solution.

[0010] Furthermore, commonly used bag filter structures have a small filtration area, and after a period of filtration, the inside of the bag is easily clogged by dust, requiring regular cleaning, which leads to a decrease in filtration efficiency. The solution is as follows: The bag filter assembly includes an air inlet connected to the end of the cooling pipe, a bag filter body located on one side of the air inlet, an air outlet on one side of the bag filter body, and a dust discharge port located at the bottom of the bag filter body. A filter support plate is welded to the middle of the bag filter body, and a bag cylinder opening is opened on the inner side of the filter support plate. Filter bags are installed inside the bag cylinder openings, and the bag cylinder openings are arranged in a 4×4 matrix, with each bag cylinder opening corresponding to a filter bag.

[0011] A filter bag bracket is installed on the inner side of the filter bag, and the filter bag bracket supports the filter bag. A bracket fixing plate is welded to the lower surface of the filter bag bracket, and the bracket fixing plate is bolted to the bottom of the filter support plate to clamp and limit the filter bag.

[0012] A hydraulic rod is installed at the top of the main body of the bag filter box. A traction rod is screwed to the output end of the hydraulic rod. A connecting bracket is screwed to both ends of the traction rod. A dust collector plate is screwed to the lower side of the connecting bracket. The hydraulic rod drives the dust collector plate to move vertically up and down through the traction rod and the connecting bracket.

[0013] The inner side of the dust removal sleeve is provided with an annular nozzle, which is perpendicular to the filter bag and corresponds to it one by one. An air supply solenoid valve is installed in the middle of the annular nozzle, and an air supply pipe is connected to the outside of the air supply solenoid valve as a further improvement of this technical solution.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this flue gas desulfurization device for roasting tailings, when flue gas flows into the cyclone dust collector body from the dust collector inlet, after separation by the cyclone dust collector body, the flue gas is discharged from the dust collector outlet. Most of the dust falls along the conical inner wall at the lower end of the cyclone dust collector body and accumulates in the ash collection box inside the ash collection bin. A small portion of the dust adheres to the inner wall of the cyclone dust collector body, especially inside the conical structure. At this time, the rotary motor, through the support column, assists the wall scraper to rotate slowly, continuously scraping off the dust adhering to the inner wall of the cyclone dust collector body. Since the dust is granular, it flows into the ash collection box from the unsealed area of ​​the rotary motor and the cyclone dust collector body. This area has a large space, and since the dust is granular, it will not cause sudden blockage at the bottom of the cyclone dust collector body. Subsequently, only periodic cleaning is required. This reduces the frequency of cleaning the inner wall of the cyclone dust collector. A dustproof structure is installed on the shaft end of the rotating motor to prevent dust from entering its interior. After separation by the cyclone dust collector, the high-temperature flue gas enters the cooling pipe. At this time, the external circulating water tank, through a water pump, sends cooling water into the water-cooling jacket through the inlet. The cooling water flows through the hollow layer between the cooling pipe and the water-cooling jacket, exits from the outlet, and flows back into the external circulating water tank. The cooling water in the tank is cooled by the cooling device and then flows back into the water-cooling jacket through the inlet for circulating cooling. This process removes a large amount of heat through heat exchange, cooling the flue gas. Furthermore, the heat dissipation fins further increase the heat exchange area, significantly improving heat dissipation efficiency. The aluminum alloy material combines lightweight and high thermal conductivity.

[0015] 2. In this flue gas desulfurization device for roasting tailings, when needed, the flue gas enters the main body of the bag filter box through the inlet and undergoes deep filtration through the filter bags inside the bag cylinder. The filter bags are arranged in a 4×4 matrix, which can effectively improve the filtration area and treatment efficiency, and is suitable for the continuous and efficient purification needs of industrial flue gas in a large range. At the same time, the bag support inside the filter bag provides open support for the filter bag. After the filter bag has been filtering for a period of time, a large amount of dust will be attached to the inner wall of the filter bag. At this time, the hydraulic rod drives the dust removal sleeve plate to move precisely downward in the vertical direction through the traction rod and connecting bracket. Then, high-pressure gas provides instantaneous pulse airflow to the annular nozzle through the air supply pipe and the air supply solenoid valve. As the hydraulic rod descends, each filter bag is cleaned from top to bottom. The airflow impacts the inner wall of the filter bag, causing the attached dust to fall off the inner wall of the filter bag and be discharged from the ash discharge port below. This can effectively reduce the frequency of manual cleaning and achieve more uniform and thorough cleaning of the filter bags, significantly extending their service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall assembly structure of the flue gas inlet component of the present invention; Figure 3 This is a schematic diagram of the fitting structure from the cooling pipe to the water outlet of the present invention; Figure 4 This is a cross-sectional structural diagram of the cooling pipe and water-cooled jacket of the present invention; Figure 5 This is a cross-sectional internal structure diagram of the cyclone dust collector body of the present invention; Figure 6 This is a schematic diagram of the cooperative structure of the rotary motor and the main body of the cyclone dust collector of the present invention; Figure 7 This is a schematic diagram of the overall structure of the bag filter assembly of the present invention; Figure 8 This is a schematic diagram of the internal structure of the main body of the bag filter box of the present invention; Figure 9 This is a schematic diagram of the mating structure between the filter tray and the bracket fixing plate of the present invention; Figure 10 This is a schematic diagram of the mating structure between the hydraulic rod and the air supply pipe of the present invention; Figure 11 This is a schematic diagram of the cooperation structure between the annular nozzle and the air supply solenoid valve of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 1. Cyclone dust collector main body; 2. Dust collector air inlet; 3. Flue gas inlet assembly; 301. Flue gas guide pipe; 302. Flue gas guide hood; 303. Guide vane; 304. Arc-shaped pipe; 305. Flue gas inlet pipe; 4. Cyclone dust collector cleaning assembly; 401. Rotary motor; 402. Wall scraper; 403. Support column; 404. Ash hopper; 405. Ash box; 406. Dust collector air outlet; 407. Cooling pipe; 408. Water cooling jacket; 409. Heat dissipation fins; 410. Water inlet 411. Water outlet; 5. Bag filter assembly; 501. Air inlet of bag filter box; 502. Main body of bag filter box; 503. Air outlet of bag filter box; 504. Ash discharge port; 505. Filter support plate; 506. Bag cylinder opening; 507. Filter bag; 508. Bag support; 509. Support fixing plate; 510. Hydraulic rod; 511. Traction rod; 512. Connecting bracket; 513. Dust collector sleeve plate; 514. Annular nozzle; 515. Air supply solenoid valve; 516. Air supply pipe. 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] Bag filters have a small filtration area, and after a period of time, the inside of the bags is easily clogged with dust, requiring regular cleaning and leading to a decrease in filtration efficiency.

[0020] Therefore, the present invention provides a flue gas desulfurization device for roasting tailings. See [link to relevant documentation]. Figure 1-11 As shown, It includes a cyclone dust collector body 1, one end of which is connected to a dust collector inlet 2, and also includes: The flue gas inlet assembly 3 is installed on the outside of the dust collector inlet 2. The flue gas inlet assembly 3 includes a flue pipe 301 installed on the outside of the dust collector inlet 2 and a flue gas guide hood 302 set at the end of the flue pipe 301. Cyclone dust collector cleaning assembly 4 is installed at the other end of the cyclone dust collector body 1. The cyclone dust collector cleaning assembly 4 includes a rotary motor 401 installed at the bottom inner side of the cyclone dust collector body 1, a wall scraper 402 installed inside the cyclone dust collector body 1, a dust collector outlet 406 installed at the top of the cyclone dust collector body 1, and a cooling pipe 407 outside the dust collector outlet 406. Bag filter assembly 5 is installed at the end of cooling pipe 407.

[0021] For details, see Figure 1-2 As shown.

[0022] The inner wall of the flue gas guide hood 302 is welded with guide vanes 303. Three sets of guide vanes 303 are arranged at equal intervals and are spirally distributed. An arc-shaped pipe 304 is connected to the outer side of the flue gas guide hood 302. A flue gas inlet pipe 305 is connected to the outer side of the arc-shaped pipe 304. The arc-shaped pipe 304 has an arc-shaped structure, and the flue gas inlet pipe 305 has a trumpet-shaped structure.

[0023] The flue gas generated after roasting the tailings is injected into the flue gas inlet pipe 305 through the exhaust port. After passing through the flue gas inlet pipe 305, it enters the arc-shaped pipe 304 and flows into the flue gas guide hood 302. The guide vanes 303 in the flue gas guide hood 302 spirally guide the flue gas to form a stable rotating airflow, which is then sent into the cyclone dust collector body 1. During this process, the flue gas inlet pipe 305 is funnel-shaped, so the flue gas enters from the open end and is ejected at high speed from the narrow end, which effectively increases the initial velocity and subsequent rotational speed of the airflow. The arc-shaped structure of the arc-shaped pipe 304 effectively avoids the flue gas from generating eddies, prevents dust from accumulating on the inner wall of the pipe, and ensures that the airflow smoothly transitions to the guide hood.

[0024] For details, see Figure 1 and 5 As shown in -6.

[0025] The wall scraper 402 is fixedly connected to the output shaft of the rotary motor 401. A support column 403 is connected in the middle of the wall scraper 402. A ash storage bin 404 is welded to the bottom of the cyclone dust collector body 1. An ash storage box 405 is installed inside the ash storage bin 404. A dust collector outlet 406 is installed at the top of the cyclone dust collector body 1. The outer surface of the wall scraper 402 is tightly fitted to the conical inner wall of the cyclone dust collector body 1.

[0026] When flue gas flows into the cyclone dust collector body 1 from the dust collector inlet 2, after being separated by the cyclone dust collector body 1, the flue gas is discharged from the dust collector outlet 406. Most of the dust will fall along the conical inner wall at the lower end of the cyclone dust collector body 1 and accumulate in the dust collection box 405 inside the dust collection bin 404. A small portion of the dust will be adsorbed on the inner wall of the cyclone dust collector body 1, especially inside the conical structure. At this time, the rotary motor 401 assists the wall scraper 402 to rotate slowly through the support column 403, continuously removing the adsorbed dust. Dust is scraped off the inner wall of the cyclone dust collector body 1. Since the dust is granular, it flows into the ash collection box 405 from the unsealed area of ​​the rotary motor 401 and the cyclone dust collector body 1. This area is relatively large, and since the dust is granular, it will not cause sudden blockage of the area at the bottom of the cyclone dust collector body 1. Subsequently, it only needs to be cleaned periodically, reducing the frequency of cleaning the inner wall of the cyclone dust collector body 1. The shaft end of the rotary motor 401 is equipped with a dustproof structure to prevent dust from entering the interior of the rotary motor 401.

[0027] For details, see Figure 1 and 3 As shown in -4.

[0028] A cooling pipe 407 is installed on the outside of the dust collector outlet 406. A water-cooling jacket 408 is installed on the outside of the cooling pipe 407. One end of the water-cooling jacket 408 is connected to a water inlet 410, and the other end of the water-cooling jacket 408 is connected to a water outlet 411. There is a hollow layer between the water-cooling jacket 408 and the cooling pipe 407. A cooling water circulation channel is formed through the water inlet 410 and the water outlet 411. Heat dissipation fins 409 are welded to the outside of the water-cooling jacket 408. The heat dissipation fins 409 are evenly distributed and are made of aluminum alloy.

[0029] After being separated by the cyclone dust collector body 1, the high-temperature flue gas enters the cooling pipe 407. At this time, the external circulating water tank, through the water pump, sends cooling water into the water-cooled jacket 408 through the inlet 410. The cooling water flows through the hollow layer between the cooling pipe 407 and the water-cooled jacket 408, and is discharged from the outlet 411, flowing back into the external circulating water tank. The cooling water flowing into the tank is cooled by the cooling device, and then flows back into the water-cooled jacket 408 through the inlet 410 for circulating cooling. In this way, a large amount of heat is carried away through heat exchange, and the flue gas is cooled. Furthermore, the heat dissipation fins 409 further increase the heat exchange area, significantly improving the heat dissipation efficiency. The aluminum alloy material used in the fins combines lightweight and high thermal conductivity.

[0030] For details, see Figure 1 and 7 As shown in -11.

[0031] The bag filter assembly 5 includes a bag filter box inlet 501 connected to the end of the cooling pipe 407, a bag filter box body 502 located on one side of the bag filter box inlet 501, a bag filter box outlet 503 located on one side of the bag filter box body 502, a dust discharge port 504 located at the bottom of the bag filter box body 502, a filter support plate 505 welded in the middle of the bag filter box body 502, and a bag cylinder opening 506 on the inner side of the filter support plate 505. A filter bag 507 is installed inside the opening 506. The bag openings 506 are arranged in a 4×4 matrix, and each bag opening corresponds to a filter bag 507. A bag support 508 is installed inside the filter bag 507, and the bag support 508 supports the filter bag 507. A support fixing plate 509 is welded to the lower surface of the bag support 508. The support fixing plate 509 is bolted to the bottom of the filter support plate 505 to clamp and limit the filter bag 507.

[0032] When needed, flue gas enters the main body 502 of the bag filter box through the air inlet 501 and undergoes deep filtration through the filter bags 507 inside the bag cylinder opening 506. The filter bags 507 are arranged in a 4×4 matrix, which can effectively improve the filtration area and treatment efficiency, and is suitable for the continuous and efficient purification needs of industrial flue gas in a wide range. At the same time, the bag support 508 inside the filter bags 507 provides open support for the filter bags 507.

[0033] For details, see Figure 1 , 7 -8 and 10-11 are shown.

[0034] A hydraulic rod 510 is installed at the top of the main body 502 of the bag filter box. The output end of the hydraulic rod 510 is screwed to a traction rod 511. The two ends of the traction rod 511 are screwed to a connecting bracket 512. The lower side of the connecting bracket 512 is screwed to a dust collector plate 513. The hydraulic rod 510 drives the dust collector plate 513 to move vertically up and down through the traction rod 511 and the connecting bracket 512. An annular nozzle 514 is provided on the inner side of the dust collector plate 513. The annular nozzle 514 is perpendicular to the filter bag 507 and corresponds to it one by one. An air supply solenoid valve 515 is installed in the middle of the annular nozzle 514. An air supply pipe 516 is connected to the outer side of the air supply solenoid valve 515.

[0035] After the filter bag 507 has been filtering for a period of time, a large amount of dust will adhere to the inner wall of the filter bag 507. At this time, the hydraulic rod 510 drives the dust collector plate 513 to move precisely downward in the vertical direction through the traction rod 511 and the connecting bracket 512. Then, high-pressure gas provides instantaneous pulse airflow to the annular nozzle 514 through the air supply pipe 516 in conjunction with the air supply solenoid valve 515. As the hydraulic rod 510 descends, each filter bag 507 is cleaned from top to bottom. The airflow impacts the inner wall of the filter bag 507, causing the attached dust to fall off from the inner wall of the filter bag 507 and be discharged from the ash discharge port 504 below. This can effectively reduce the frequency of manual cleaning and achieve a more uniform and thorough cleaning of the filter bag 507, significantly extending its service life.

[0036] Working principle: When needed, the operator connects the flue gas inlet pipe 305 to the flue gas outlet of the roasting tailings processing device, then connects the arc-shaped pipe 304 and the flue gas guide hood 302, and then connects the flue gas guide hood 302 to the guide pipe 301. The guide pipe 301 is then connected to the dust collector inlet 2 of the cyclone dust collector body 1. Next, the cooling pipe 407 is connected to the dust collector outlet 406. Cooling water is then pumped from an external circulating water tank through the water pump and inlet 410 into the cavity between the cooling pipe 407 and the water-cooled jacket 408, flowing through the water pump and exiting from the outlet 411 back into the circulating water tank, completing the water circulation process. Then, the end of the cooling pipe 407 is connected to the bag filter inlet 501 of the bag filter body 502, and the bag filter outlet 503 is connected to the desulfurization operation... After the desulfurization tower is connected, the filter bag 507 is inserted from bottom to top through the bag opening 506 of the filter support plate 505. The edge of the filter bag 507 will be caught on the edge of the bag opening 506. Then, the bag support 508 is inserted into the middle of the filter bag 507. The support fixing plate 509 at the end of the bag support 508 is fixed to the filter support plate 505 by bolts, thereby forming a clamping limit on the edge of the filter bag 507. Finally, the traction rod 511 is connected to the hydraulic rod 510 by bolts. Then, the connecting bracket 512 is connected to both ends of the traction rod 511. The dust collector sleeve plate 513 is connected to the connecting bracket 512. The annular nozzle 514 is vertically and symmetrically distributed with the filter bag 507. In the non-starting stage, the dust collector sleeve plate 513 will be located at the top of the bag filter box body 502.

[0037] Once prepared, the flue gas enters the flue gas guide hood 302 through the flue gas inlet pipe 305 and the arc-shaped pipe 304. As the flue gas passes through the inlet pipe 305 and the arc-shaped pipe 304, the inlet pipe 305 increases the flue gas velocity, and the arc-shaped pipe 304 reduces eddy formation. After entering the guide hood 302, the flue gas passes through the guide vanes 303 to form a stable rotating airflow, which is then sent into the cyclone dust collector body 1 through the flue gas guide pipe 301. After centrifugal separation by the cyclone dust collector body 1, the flue gas exits from the dust collector. Air is discharged from vent 406, while dust slides down the conical inner wall of the cyclone dust collector body 1 and falls into the ash collection box 405 inside the ash collection bin 404. Since a large amount of dust adheres to the inner wall of the cyclone dust collector body 1, the rotary motor 401 rotates slowly, and through the support of the support column 403, drives the wall scraper 402 to scrape and clean the inner wall of the cyclone dust collector body 1. The scraped dust falls into the ash collection box 405, achieving the cleaning of the inner wall. Meanwhile, the high-temperature gas discharged from the dust collector outlet 406 enters the cooling pipe 407 and... First, the flue gas undergoes heat exchange and cooling through the cooling water in the water-cooling jacket 408, and is rapidly dissipated by the heat dissipation fins 409, reducing the flue gas temperature to the safe range required for bag filtration. Then, the cooled flue gas enters the main body 502 of the bag filter box through the inlet 501, passing evenly through the filter bags 507 from bottom to top. Dust is intercepted by the filter bags 507, while the filtered gas is discharged from the outlet 503 of the bag filter box. With use, a large amount of dust accumulates inside the filter bags 507, hindering dust filtration. At this point, the hydraulic rod... When 510 is started, the dust collector sleeve 513 is driven to move axially downward through the traction rod 511 and the connecting bracket 512. At this time, high-pressure gas is sent into the annular nozzle 514 through the air supply pipe 516 in conjunction with the air supply solenoid valve 515, and the filter bag 507 is blown off from top to bottom by high-pressure pulse jet, so that the dust attached to the inner surface of the filter bag 507 is blown off. The blown-off dust is naturally discharged from the ash discharge port 504 under the action of gravity, while the filtered flue gas is discharged from the air outlet 503 of the bag filter box and input into the desulfurization tower for desulfurization operation.

[0038] 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 process, method, article, or apparatus.

[0039] 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 desulfurization device for roasting tailings, comprising a cyclone dust collector body (1), one end of which is connected to a dust collector inlet (2), characterized in that: Also includes: The flue gas inlet assembly (3) is installed on the outside of the dust collector inlet (2). The flue gas inlet assembly (3) includes a flue pipe (301) installed on the outside of the dust collector inlet (2) and a flue gas guide hood (302) set at the end of the flue pipe (301). Cyclone dust collector cleaning assembly (4), the cyclone dust collector cleaning assembly (4) is installed at the other end of the cyclone dust collector body (1), the cyclone dust collector cleaning assembly (4) includes a rotary motor (401) installed at the bottom of the inner side of the cyclone dust collector body (1), a wall scraper (402) set inside the cyclone dust collector body (1), a dust collector outlet (406) set at the top of the cyclone dust collector body (1) and a cooling pipe (407) outside the dust collector outlet (406). A bag filter assembly (5) is installed at the end of a cooling pipe (407).

2. The flue gas desulfurization device for roasted tailings according to claim 1, characterized in that: The inner wall of the flue gas guide hood (302) is welded with guide vanes (303), and the guide vanes (303) are arranged in three sets at equal intervals and in a spiral distribution.

3. The flue gas desulfurization device for roasted tailings according to claim 1, characterized in that: An arc-shaped pipe (304) is connected to the outside of the flue gas guide hood (302), and a flue gas inlet pipe (305) is connected to the outside of the arc-shaped pipe (304). The arc-shaped pipe (304) has an arc-shaped structure, and the flue gas inlet pipe (305) has a trumpet-shaped structure.

4. The flue gas desulfurization device for roasted tailings according to claim 1, characterized in that: The wall scraper (402) is fixedly connected to the output shaft of the rotary motor (401). A support column (403) is connected in the middle of the wall scraper (402). A ash storage bin (404) is welded to the bottom of the cyclone dust collector body (1). An ash storage box (405) is installed inside the ash storage bin (404). A dust collector outlet (406) is installed at the top of the cyclone dust collector body (1). The outer surface of the wall scraper (402) is tightly fitted to the conical inner wall of the cyclone dust collector body (1).

5. The flue gas desulfurization device for roasted tailings according to claim 4, characterized in that: A water-cooled jacket (408) is provided on the outside of the cooling pipe (407). One end of the water-cooled jacket (408) is connected to a water inlet (410), and the other end of the water-cooled jacket (408) is connected to a water outlet (411). There is a hollow layer between the water-cooled jacket (408) and the cooling pipe (407), and a cooling water circulation channel is formed through the water inlet (410) and the water outlet (411).

6. The flue gas desulfurization device for roasted tailings according to claim 5, characterized in that: The outer side of the water-cooled sleeve (408) is welded with heat dissipation fins (409), which are evenly distributed and are made of aluminum alloy.

7. The flue gas desulfurization device for roasted tailings according to claim 1, characterized in that: The bag filter assembly (5) includes a bag filter box inlet (501) connected to the end of the cooling pipe (407), a bag filter box body (502) located on one side of the bag filter box inlet (501) and a bag filter box outlet (503) located on one side of the bag filter box body (502), and a dust discharge port (504) located at the bottom of the bag filter box body (502). A filter support plate (505) is welded in the middle of the bag filter box body (502). A bag cylinder opening (506) is opened on the inner side of the filter support plate (505). A filter bag (507) is installed on the inner side of the bag cylinder opening (506). The bag cylinder opening (506) is arranged in a 4×4 matrix, and the bag cylinder opening (506) corresponds one-to-one with the filter bag (507).

8. The flue gas desulfurization device for roasted tailings according to claim 7, characterized in that: The filter bag (507) is equipped with a bag support (508) on its inner side, and the bag support (508) supports the filter bag (507). A support fixing plate (509) is welded to the lower surface of the bag support (508). The support fixing plate (509) is bolted to the bottom of the filter support plate (505) to clamp and limit the filter bag (507).

9. The flue gas desulfurization device for roasting tailings according to claim 7, characterized in that: A hydraulic rod (510) is installed at the top of the main body (502) of the bag filter box. The output end of the hydraulic rod (510) is screwed to a traction rod (511). The two ends of the traction rod (511) are screwed to a connecting bracket (512). The lower side of the connecting bracket (512) is screwed to a dust collector plate (513). The hydraulic rod (510) drives the dust collector plate (513) to move vertically up and down through the traction rod (511) and the connecting bracket (512).

10. The flue gas desulfurization device for roasted tailings according to claim 9, characterized in that: The dust removal sleeve plate (513) is provided with an annular nozzle (514) on its inner side, and the annular nozzle (514) and the filter bag (507) are arranged vertically and correspond one to one. An air supply solenoid valve (515) is installed in the middle of the annular nozzle (514), and an air supply pipe (516) is connected to the outer side of the air supply solenoid valve (515).

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