A casting slag fume atomization dust reduction device

Abstract

The present invention relates to the technical field of flue gas dust reduction, and in particular to a casting slag flue gas atomization dust reduction device, comprising a dust collecting assembly; the dust collecting assembly comprises a dust collecting hood and a dust collecting pipe; one end of the dust collecting pipe is fixedly connected to the dust collecting hood; the dust collecting pipe is fixedly connected to a spray assembly; the spray assembly comprises a water inlet pipe; the lower end of the water inlet pipe is fixedly connected to several first branch pipes at equal intervals; the end of the first branch pipe is fixedly connected to a spray head; the first branch pipe is fixedly connected to the upper end of the dust collecting pipe; the spray assembly also includes a first water outlet pipe; the upper end of the first water outlet pipe is fixedly connected to several second branch pipes at equal intervals; the second branch pipe is fixedly connected to the lower end of the dust collecting pipe; through the above-mentioned connection method, the spray head forms a circular water curtain with high-pressure water in the dust collecting pipe, which captures and reduces dust of the flue gas entering the dust collecting pipe, and also flushes the inside of the dust collecting pipe to prevent blockage inside the dust collecting pipe.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas dust reduction, in particular to a casting slag flue gas atomization dust reduction device. Background Art

[0002] Wet dust removal, also known as scrubbing dust removal, utilizes water (or other liquids) to maintain extended contact with dust particles, separating them from the atmosphere. Due to its simple structure, low cost, and high purification efficiency, this technology is widely used for various dusts that do not react chemically with water, and is particularly suitable for purifying high-temperature, flammable, and explosive gas environments.

[0003] Casting slag is the residual steel residue left in the ladle when the ladle and tundish are replaced during the continuous casting process. The slag temperature is around 1100°C and needs to be cooled with water to below 200°C for pulverization before reuse. The pulverization process produces a large amount of dusty and water-laden flue gas, with particulate matter concentrations as high as 600-800mg / m³.

[0004] The conventional dust collection and disposal measure for casting slag flue gas is to collect the flue gas and introduce it into a scrubber through a flue gas duct. The flue gas then undergoes spraying, washing, dehydration, and other processes within the duct before being discharged. However, actual operation has shown that the dust collection system has a high failure rate and a heavy workload for operation and maintenance. The main manifestations of these problems are dust accumulation and blockage in the flue gas duct and scrubber, corrosion of the steel structure, fouling on the fan blades causing fan vibration, and low dust collection efficiency. Analysis has shown that the main cause of these equipment anomalies is that the casting slag flue gas contains large amounts of dust and moisture. If the flue gas flow rate is too low, dust will accumulate in the duct, and if the scrubber's treatment capacity is too low, it will cause fouling in the scrubber. After treatment, the flue gas concentration exceeds the standard. After long-term operation, this creates a vicious cycle, leading to system blockage, fan vibration, and increased scrubber load. Summary of the Invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that a large amount of dust and moisture is generated when pulverizing casting slag. If the flue gas flow rate is too low, it will cause dust accumulation in the pipeline, and if the treatment capacity of the washing tower is too small, it will cause fouling in the washing tower. After treatment, the flue gas concentration exceeds the standard, and after long-term operation, a vicious cycle will be formed, resulting in system blockage, fan vibration, increased washing tower load and other abnormalities.

[0006] The dust collecting device of claim 1, wherein the dust collecting device comprises a dust collecting hood and a dust collecting pipe; one end of the dust collecting pipe is fixedly connected to the dust collecting hood; the smoke is sucked into the dust collecting pipe through the dust collecting hood and enters the dust collecting pipe; the dust collecting pipe is fixedly connected to the dust collecting pipe; the spray assembly comprises a water inlet pipe; the lower end of the water inlet pipe is fixedly connected to a plurality of first branches at equal intervals; the end of the first branch pipe is fixedly connected to the spray head; the spray assembly also includes a first water outlet pipe; the upper end of the first outlet pipe is fixedly connected to a plurality of second branches at equal intervals; the second branch pipe is fixedly connected to the lower end of the dust collecting pipe; the lower end of the first outlet pipe is fixedly connected to the second outlet pipe; the second outlet pipe leads to the sedimentation tank; a water outlet is provided on the side of the sedimentation tank and is connected to the water inlet of the water pump through a pipe; the outlet of the water pump is connected to the water inlet pipe

[0007] In one embodiment of the present invention, the dust collecting hood comprises an outer shell; the outer shell is configured to be a conical structure; an air inlet is provided on the top of the outer shell; the air inlet is connected to the dust collecting pipe through a pipe; a conical partition is fixedly connected to the bottom of the inner wall of the outer shell; the conical partition and the outer shell form a double-layer structure; a plurality of sieve holes are provided at equal intervals on the bottom of the conical partition; a through hole is provided on the top of the conical partition; the through hole is coaxial with the air inlet; a cover plate is provided above the through hole; the cover plate is configured to be a conical structure; the diameter of the cover plate is larger than the diameter of the through hole; the cover plate is fixed to the conical partition by support rods; the support rods are arranged at equal intervals on the top of the conical partition;

[0008] In one embodiment of the present invention, one end of the water inlet pipe is connected to the outlet of the water pump through a pipe; the first branch pipe is L-shaped; the end of the first branch pipe is located at the center of the dust collecting pipe; the sprinkler head includes a nozzle; the nozzle is connected to the first branch pipe; one end of the nozzle is fixedly connected to a boss; a fixing frame is fixedly connected to the boss; a conical circular plate is fixedly connected to the fixing frame; the conical circular plate points to the center of the nozzle; the conical circular plate is used to form water sprayed from the nozzle into a circular water curtain;

[0009] In one embodiment of the present invention, conical baffles are fixedly connected to both ends of the interior of the dust collecting hood; both conical baffles point to the middle position of the dust collecting pipe;

[0010] In one embodiment of the present invention, the first outlet pipe is configured as a V-shaped structure; the V-shaped structure of the first outlet pipe facilitates sewage collection and flow; the second branch pipe is connected to the dust collecting pipe and the first outlet pipe; the second outlet pipe is fixedly connected to the lowest point of the first outlet pipe; a circulating pump is fixedly connected to the second outlet pipe; and the second outlet pipe extends into the interior of the sedimentation tank;

[0011] In one embodiment of the present invention, the water outlet of the sedimentation tank is arranged at the upper end of the sedimentation tank; the water outlet is connected to the water pump through a pipeline; the sedimentation tank is set to be large enough so that the sewage has enough time to settle;

[0012] In one embodiment of the present invention, a cleaning assembly is fixedly connected to the inner wall of the sedimentation tank; the cleaning assembly includes a roller brush and a slide rail; two roller brushes are provided; the two roller brushes are in contact with the longer side wall of the sedimentation tank; both ends of the roller brush slide in the slide rail; the slide rail is fixedly connected to two side surfaces of the sedimentation tank perpendicular to the roller brush; four slide rails are provided; the slide rails are composed of two vertical plates; the slide rails are used to guide the roller brushes;

[0013] In one embodiment of the present invention, a mounting plate is fixedly connected to the top of one end of the sedimentation tank; a cylinder is fixedly connected to the mounting plate; a movable shaft of the cylinder is fixedly connected to the horizontal plate; two ends of the horizontal plate are respectively fixedly connected to connecting plates; two connecting plates are provided; the connecting plates are rotatably connected to the roller brush; the cylinder is used to drive the roller brush to move;

[0014] In one embodiment of the present invention, a rack is fixedly connected to the vertical plate facing the interior of the sedimentation tank; gears are fixedly connected to both ends of the roller brush; the gears are meshed with the rack; the rack is used for the roller brush to rotate;

[0015] In one embodiment of the present invention, the other end of the dust collecting pipe is connected to a washing tower, which is in turn connected to a chimney; the flue gas that has passed through the dust collecting hood and the spray assembly and has been dust-reduced enters the washing tower, and is discharged from the chimney after being washed by the washing tower.

[0016] The above technical solution of the present invention has the following advantages over the prior art:

[0017] The present invention discloses a device for atomizing and dust reduction of casting slag flue gas, which provides a dust collecting hood at the inlet of a dust collecting pipe, and installs a spray assembly on the dust collecting pipe. The dust collecting hood pulverizes the casting slag and filters out large particles of impurities and residual steel slag in the flue gas, and then the spray assembly is used to capture and reduce dust in the flue gas entering the dust collecting pipe. The circular water curtain formed by the nozzle and the conical circular plate can also flush and clean the inner wall of the dust collecting pipe, thereby gradually reducing the dust concentration in the flue gas and alleviating the load on the washing tower.

[0018] By setting up a sufficiently large sedimentation tank, a water pump, a circulation pump and a cleaning component, the sewage generated by dust reduction is pumped into the sedimentation tank by the circulation pump for sedimentation, and the generated clarified water is pumped to the dust reduction spray component by the water pump, forming a circulating water system and reducing the waste of water resources. Then, through the coordination of the rack and gear, the cleaning component rotates while cleaning the side wall of the sedimentation tank, so that the cleaning component moves up and down and rotates at the same time, thereby improving the cleaning efficiency of the sedimentation tank by the cleaning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a perspective view of the present invention;

[0021] Figure 2 It is an overall exploded view of the present invention;

[0022] Figure 3 This is a structural diagram of the water inlet pipe, the first branch pipe and the sprinkler head of the present invention;

[0023] Figure 4 It is a structural diagram of the transverse plate and the connecting plate of the present invention;

[0024] Figure 5 It is a structural diagram of the roller brush of the present invention;

[0025] Figure 6 is a cross-sectional view of the dust collecting pipe of the present invention;

[0026] Figure 7 It is a cross-sectional view of the dust collecting hood of the present invention;

[0027] Figure 8 yes Figure 3 Enlarged view of point A in the middle;

[0028] Figure 9 It is a cross-sectional view of a sedimentation tank of the present invention.

[0029] Description of the accompanying figures: 1. Dust collecting assembly; 11. Dust collecting cover; 111. Housing; 112. Air inlet; 113. Conical partition; 114. Through hole; 115. Cover plate; 116. Support rod; 117. Sieve hole; 12. Dust collecting pipe; 121. Conical baffle; 2. Spraying assembly; 21. Water inlet pipe; 22. First branch pipe; 23. Spraying head; 231. Spraying pipe; 232. Convex 233, fixed frame; 234, conical circular plate; 24, first water outlet pipe; 25, second branch pipe; 26, second water outlet pipe; 27, circulation pump; 3, sedimentation tank; 31, water outlet; 32, water pump; 4, cleaning assembly; 41, roller brush; 42, slide rail; 421, vertical plate; 5, mounting plate; 51, cylinder; 52, horizontal plate; 53, connecting plate; 6, rack; 61, gear. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0031] Reference Figures 1-9 As shown, a casting slag fume atomization dust reduction device of the present invention comprises a dust collecting assembly 1; the dust collecting assembly 1 comprises a dust collecting hood 11 and a dust collecting pipe 12; one end of the dust collecting pipe 12 is fixedly connected to the dust collecting hood 11; the smoke is sucked in through the dust collecting hood 11 and enters the dust collecting pipe 12; a spray assembly 2 is fixedly connected to the dust collecting pipe 12; the spray assembly 2 comprises a water inlet pipe 21; a plurality of first branch pipes 22 are fixedly connected to the lower end of the water inlet pipe 21 at equal intervals; a spray head 23 is fixedly connected to the end of the first branch pipe 22; the first branch pipe 23 is fixedly connected to the end of the first branch pipe 23. 22 is fixedly connected to the upper end of the dust collecting pipe 12; the spray assembly 2 also includes a first water outlet pipe 24; the upper end of the first water outlet pipe 24 is fixedly connected to a plurality of second branch pipes 25 at equal intervals; the second branch pipe 25 is fixedly connected to the lower end of the dust collecting pipe 12; the lower end of the first water outlet pipe 24 is fixedly connected to a second water outlet pipe 26; the second water outlet pipe 26 leads to the sedimentation tank 3; a water outlet 31 is provided on the side of the sedimentation tank 3, and is connected to the water inlet of a water pump 32 through a pipe; the outlet of the water pump 32 is connected to the water inlet pipe 21;

[0032] During operation, in order to save resources, the excess steel slag left over from the steelmaking continuous casting process is pulverized and reused. When the excess steel slag is pulverized, a large amount of dust-containing and water-containing flue gas is generated. These dust-containing and water-containing flue gases will cause the dust collecting device to be blocked after entering the dust collecting device, reduce the dust flow rate, and cause dust accumulation in the pipeline, forming a vicious cycle. Therefore, before the flue gas enters the dust collecting pipe 12, it first passes through the dust collecting hood 11. The dust collecting hood 11 reduces the flow rate of the flue gas, so that the larger particles in the flue gas are blocked in the dust collecting hood 11, and the flue gas concentration is reduced before entering the dust collecting pipe 12. When the flue gas enters the dust collecting pipe 12, the clarified liquid precipitated in the sedimentation tank 3 is pressurized and pumped into the water inlet pipe 21 by the water pump 32, and is sent to the spray head 23 through the first branch pipe 22. The pressurized clarified liquid is formed into a water curtain by the spray head 23. The multi-stage water curtain formed by the multiple spray heads 23 reduces dust on the flue gas and also flushes the inner wall of the dust collecting pipe 12 to ensure that the dust collecting pipe 12 is not blocked. After the clarified liquid reduces dust on the flue gas, sewage is generated. The sewage is collected into the first water outlet pipe 24 through the second branch pipe 25 and is introduced into the sedimentation tank 3 through the second water outlet pipe 26. The sewage is precipitated in the sedimentation tank 3. The formed clarified liquid is pumped by the water pump 32 and pressurized to the spray head 23 for use, thereby realizing the recycling of sewage and saving water.

[0033] See also Figure 2 and Figure 7As shown, the dust collecting hood 11 includes an outer shell 111; the outer shell 111 is arranged into a conical structure; an air inlet hole 112 is opened on the top of the outer shell 111; the air inlet hole 112 is connected to the dust collecting pipe 12 through a pipe; a conical partition plate 113 is fixedly connected to the bottom of the inner wall of the outer shell 111; the conical partition plate 113 and the outer shell 111 form a double-layer structure; a plurality of sieve holes 117 are opened at equal intervals on the bottom of the conical partition plate 113; a through hole 114 is opened on the top of the conical partition plate 113; the through hole 114 is coaxial with the air inlet hole 112; a cover plate 115 is arranged above the through hole 114; the cover plate 115 is arranged into a conical structure; the diameter of the cover plate 115 is larger than the diameter of the through hole 114; the cover plate 115 is fixed to the conical partition plate 113 by support rods 116; the support rods 116 are arranged at equal intervals on the top of the conical partition plate 113;

[0034] During operation, since the casting slag generates a large amount of dusty flue gas during pulverization, and may be accompanied by steel slag particles, these steel slag particles enter the dust collecting pipe 12 and damage the fan blades and water pump blades when passing through the fan and water pump, causing economic losses, and requiring shutdown for maintenance, which affects the dust reduction efficiency; therefore, when the flue gas enters the dust collecting pipe 12, it is necessary to remove the large particles and steel slag in the flue gas. When the flue gas enters the dust collecting hood 11, it first passes through the through hole 114 and contacts the cover plate 115. After the flue gas passes through the cover plate 115, it will change The flue gas changes direction and flows into the interior of the shell 111 from all sides of the cover plate 115. The flue gas passes through the through hole 114 and contacts the cover plate 115, changing its flow direction. The flow velocity will slow down. Under the action of gravity, large particles and steel slag will slide along the inner wall of the conical partition 113 to the bottom of the shell 111, achieving preliminary dust reduction. When a certain amount of large particles and steel slag accumulate, they can be discharged from the dust collecting hood 11 through the sieve hole 117. After the preliminary dust reduction, the flue gas passes through the air inlet 112 and enters the dust collecting pipe 12.

[0035] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, one end of the water inlet pipe 21 is connected to the outlet of the water pump 32 through a pipe; the first branch pipe 22 is L-shaped; the end of the first branch pipe 22 is located at the center of the dust collecting pipe 12; the spray head 23 includes a nozzle 231; the nozzle 231 is connected to the first branch pipe 22; one end of the nozzle 231 is fixedly connected to a boss 232; the boss 232 is fixedly connected to a fixing bracket 233; the fixing bracket 233 is fixedly connected to a conical circular plate 234; the conical circular plate 234 points to the center of the nozzle 231; the conical circular plate 234 is used to form the water sprayed from the nozzle 231 into a circular water curtain;

[0036] During operation, the flue gas after preliminary dust reduction enters the dust collecting pipe 12 from the dust collecting hood 11. At this time, the water pump 32 pressurizes the industrial water and pumps it into the rear water inlet pipe 21 through the pipeline. The water inlet pipe 21 guides the high-pressure water into the nozzle 231 through the first branch pipe 22. When the high-pressure water is ejected from the nozzle 231, a water column is formed and sprayed toward the conical circular plate 234. Since the side surface of the conical circular plate 234 is an inclined surface, when the water column contacts the conical circular plate 234, the water column will spread out to form a circular water curtain. The formed circular water curtain can capture the dust in the flue gas. Since the end of the first branch pipe 22 is located at the center of the dust collecting pipe 12, the formed circular water curtain also washes the inner wall of the dust collecting pipe 12, and washes down the dust attached to the inner wall of the dust collecting pipe 12, ensuring the unobstructed flow of the dust collecting pipe 12, making the flue gas flow smoother, reducing dust accumulation, and achieving a virtuous cycle.

[0037] See also Figure 5 As shown, conical baffles 121 are fixedly connected to both ends of the interior of the dust collecting cover 11; both conical baffles 121 point to the middle position of the dust collecting pipe 12;

[0038] During operation, the conical circular plate 234 forms a circular water curtain with the high-pressure water sprayed from the nozzle 231 and flushes it into the dust collecting pipe 12. The formed circular water curtain also has pressure. When flushing the dust collecting pipe 12, the high-pressure water flow will splash when it contacts the dust collecting pipe 12. In addition, the high-pressure water flow may be sprayed from both ends of the dust collecting pipe 12, causing water containing dust and impurities to flow back. If these sewage containing dust and impurities are not discharged, puddles will form, corroding the steel structure pipes and generating odors. By arranging the conical baffles 121 at both ends of the dust collecting pipe 12, the formed circular water curtain and the splashing water can be blocked inside the dust collecting pipe 12 and discharged.

[0039] See also Figure 2 and Figure 6 As shown, the first water outlet pipe 24 is configured as a V-shaped structure; the first water outlet pipe 24 is configured as a V-shaped structure to facilitate sewage collection and flow; the second branch pipe 25 is connected to the dust collecting pipe 12 and the first water outlet pipe 24; the second water outlet pipe 26 is fixedly connected to the lowest point of the first water outlet pipe 24; a circulating pump 27 is fixedly connected to the second water outlet pipe 26; the second water outlet pipe 26 extends into the interior of the sedimentation tank 3;

[0040] During operation, dust and impurities in the flue gas mix with water in the dust collecting pipe 12 to generate a large amount of sewage. The generated sewage flows into the first water outlet pipe 24 through the second branch pipe 25. Since the first water outlet pipe 24 is a V-shaped structure, the sewage flowing into the first water outlet pipe 24 will flow and gather in the middle of the first water outlet pipe 24 and flow into the second water outlet pipe 26. The circulation pump 27 on the second water outlet pipe 26 pumps the sewage in the second water outlet pipe 26 into the sedimentation tank 3 for sedimentation.

[0041] See also Figure 1 and Figure 2 As shown, the water outlet 31 of the sedimentation tank 3 is set at the upper end of the sedimentation tank 3; the water outlet 31 is connected to the water pump 32 through a pipe; the sedimentation tank 3 is set large enough so that the sewage has enough time to settle;

[0042] During operation, the sewage generated by dust reduction is pumped into the sedimentation tank 3 through the circulation pump 27. In order to allow the sewage flowing into the sedimentation tank 3 to have enough time to settle and form a clarified liquid, the sewage is pumped to the spray assembly 2 by the water pump 32 for use in dust reduction to form circulating water. Therefore, the sedimentation tank 3 is set to be large enough, specifically 5-8 times the circulation flow rate. The sewage is precipitated in the sedimentation tank 3, and the solid particles and impurities are precipitated to the bottom of the sedimentation tank 3. The clarified water remains in the upper part of the sedimentation tank 3. The outlet 31 located at the upper part of the sedimentation tank 3 is pressurized and pumped to the spray assembly 2 by the water pump 32 to capture the flue gas in the dust collecting pipe 12 for dust reduction.

[0043] See also Figure 2 、 Figure 4 、 Figure 5 and Figure 9 As shown, a cleaning assembly 4 is fixedly connected to the inner wall of the sedimentation tank 3; the cleaning assembly 4 includes a roller brush 41 and a slide rail 42; the roller brush 41 is provided with two; the two roller brushes 41 contact the longer side wall of the sedimentation tank 3; the two ends of the roller brush 41 slide in the slide rail 42; the slide rail 42 is fixedly connected to the two side surfaces of the sedimentation tank 3 perpendicular to the roller brush 41; the slide rail 42 is provided with four; the slide rail 42 is composed of two vertical plates 421; the slide rail 42 is used to guide the roller brush 41; the top of one end of the sedimentation tank 3 is fixedly connected to the mounting plate 5; the mounting plate 5 is fixedly connected to the cylinder 51; the moving axis of the cylinder 51 is fixedly connected to the cross plate 52; the two ends of the cross plate 52 are respectively fixedly connected to the connecting plate 53; the connecting plate 53 is provided with two; the connecting plate 53 is rotatably connected to the roller brush 41; the cylinder 51 is used to drive the roller brush 41 to move;

[0044] During operation, since a large amount of sewage needs to be precipitated in the sedimentation tank 3, a lot of silt will adhere to the side walls of the sedimentation tank 3 after long-term use. If it is not handled in time, the water outlet 31 will be blocked. When cleaning the sedimentation tank 3, the cylinder 51 is started, and the moving shaft of the cylinder 51 drives the cross plate 52 to move downward. The cross plate 52 drives the roller brush 41 to move vertically downward in the slide rail 42 through the connecting plate 53. Since the roller brush 41 contacts the side wall of the sedimentation tank 3, the roller brush 41 cleans the side wall of the sedimentation tank 3 when moving downward. The moving shaft of the cylinder 51 repeatedly moves up and down, driving the roller brush 41 to clean the inner wall of the sedimentation tank 3 multiple times, and the side wall of the sedimentation tank 3 is cleaned;

[0045] See also Figure 2 、 Figure 5 and Figure 9 As shown, a rack 6 is fixedly connected to the vertical plate 421 facing the interior of the sedimentation tank 3; gears 61 are fixedly connected to both ends of the roller brush 41; the gears 61 are meshed with the rack 6; the rack 6 is used for the roller brush 41 to rotate;

[0046] During operation, when the moving shaft of the cylinder 51 drives the horizontal plate 52 to move the roller brush 41 up and down, the gear 61 fixedly connected to the roller brush 41 is engaged with the rack 6. When the roller brush 41 moves, the roller brush 41 rotates by the action of the rack 6 and the gear 61. As a result, the roller brush 41 rotates while moving up and down, making the roller brush 41 more efficient in cleaning the inner wall of the sedimentation tank 3.

[0047] The other end of the dust collecting pipe 12 is connected to the washing tower, which is in turn connected to the chimney; the flue gas after the dust collection hood 11 and the spray assembly 2 enters the washing tower, and is discharged from the chimney after being washed by the washing tower;

[0048] During operation, large particles of impurities and steel slag are filtered through the dust collecting hood 11, and the flue gas entering the dust collecting pipe 12 is captured and dusted by the spray component 2. The concentration of the flue gas flowing into the washing tower is reduced by 50%-80%, thereby achieving the goal of gradually reducing the concentration of flue gas dust. The flue gas is then washed by the washing tower, ultimately reducing the load of the washing tower and improving the washing and dust removal efficiency.

[0049] Working principle: The dust-containing and water-containing flue gas generated by the pulverization of casting slag enters the dust collecting pipe 12 from the dust collecting hood 11, and the large particles of impurities and steel slag are filtered by the dust collecting hood 11. The flue gas enters the dust collecting pipe 12, and the water pump 32 pressurizes the clarified water precipitated in the sedimentation tank 3 and pumps it into the first branch pipe 22 through the water inlet pipe 21. The nozzle 231 and the conical circular plate 234 form a circular water curtain to capture and reduce dust in the flue gas. The sewage generated by the dust reduction of the flue gas is collected in the first outlet pipe 24 and discharged into the sedimentation tank 3 through the circulation pump 27. The sewage continues to precipitate to form a circulating water system. The flue gas that has captured and reduced dust is washed in the washing tower. Finally, the flue gas meets the emission standards and is discharged from the chimney.

[0050] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A casting slag fume atomization dust reduction device, characterized by: The invention comprises a dust collecting assembly (1); the dust collecting assembly (1) comprises a dust collecting hood (11) and a dust collecting pipe (12); one end of the dust collecting pipe (12) is fixedly connected to the dust collecting hood (11); smoke and dust are sucked into the dust collecting pipe (12) through the dust collecting hood (11); a spray assembly (2) is fixedly connected to the dust collecting pipe (12); the spray assembly (2) comprises a water inlet pipe (21); a plurality of first branch pipes (22) are fixedly connected to the lower end of the water inlet pipe (21) at equal intervals; a spray head (23) is fixedly connected to the end of the first branch pipe (22); the first branch pipe (22) is fixedly connected to the dust collecting pipe. (12); the spray assembly (2) further comprises a first water outlet pipe (24); the upper end of the first water outlet pipe (24) is fixedly connected to a plurality of second branch pipes (25) at equal intervals; the second branch pipe (25) is fixedly connected to the lower end of the dust collecting pipe (12); the lower end of the first water outlet pipe (24) is fixedly connected to a second water outlet pipe (26); the second water outlet pipe (26) leads to the sedimentation tank (3); a water outlet (31) is provided on the side of the sedimentation tank (3) and is connected to the water inlet of a water pump (32) through a pipeline; the outlet of the water pump (32) is connected to the water inlet pipe (21); The dust collecting hood (11) comprises an outer shell (111); the outer shell (111) is configured to have a conical structure; an air inlet (112) is provided at the top of the outer shell (111); the air inlet (112) is communicated with the dust collecting pipe (12) through a pipe; a conical partition (113) is fixedly connected to the bottom of the inner wall of the outer shell (111); the conical partition (113) and the outer shell (111) form a double-layer structure; a plurality of sieve holes (117) are provided at equal intervals at the bottom of the conical partition (113); A through hole (114) is provided on the top of the conical partition (113); the through hole (114) is coaxial with the air inlet (112); a cover plate (115) is provided above the through hole (114); the cover plate (115) is provided in a conical structure; the diameter of the cover plate (115) is larger than the diameter of the through hole (114); the cover plate (115) is fixed to the conical partition (113) via support rods (116); the support rods (116) are provided at equal intervals on the top of the conical partition (113); One end of the water inlet pipe (21) is connected to the outlet of the water pump (32) through a pipeline; the first branch pipe (22) is L-shaped; the end of the first branch pipe (22) is located at the center of the dust collecting pipe (12); the spray head (23) includes a nozzle (231); the nozzle (231) is connected to the first branch pipe (22); one end of the nozzle (231) is fixedly connected to a boss (232); a fixing frame (233) is fixedly connected to the boss (232); a conical circular plate (234) is fixedly connected to the fixing frame (233); the conical circular plate (234) points to the center of the nozzle (231); the conical circular plate (234) is used to form the water sprayed from the nozzle (231) into a circular water curtain; Conical baffles (121) are fixedly connected to both ends of the interior of the dust collecting pipe (12); the two conical baffles (121) both point to the middle position of the dust collecting pipe (12).

2. The casting slag fume atomization dust reduction device according to claim 1, characterized in that: The first water outlet pipe (24) is configured as a V-shaped structure; the second branch pipe (25) is connected to the dust collecting pipe (12) and the first water outlet pipe (24); the second water outlet pipe (26) is fixedly connected to the lowest point of the first water outlet pipe (24); a circulating pump (27) is fixedly connected to the second water outlet pipe (26); and the second water outlet pipe (26) extends into the interior of the sedimentation tank (3).

3. The casting slag fume atomization dust reduction device according to claim 2, characterized in that: The water outlet (31) of the sedimentation tank (3) is arranged at the upper end of the sedimentation tank (3); the water outlet (31) is connected to the water pump (32) through a pipeline.

4. The casting slag fume atomization dust reduction device according to claim 3, characterized in that: A cleaning assembly (4) is fixedly connected to the inner wall of the sedimentation tank (3); the cleaning assembly (4) includes a roller brush (41) and a slide rail (42); two roller brushes (41) are provided; the two roller brushes (41) are in contact with the longer side wall of the sedimentation tank (3); both ends of the roller brush (41) slide in the slide rail (42); the slide rail (42) is fixedly connected to two side surfaces of the sedimentation tank (3) that are perpendicular to the roller brush (41); four slide rails (42) are provided; the slide rail (42) is composed of two vertical plates (421); and the slide rail (42) is used to guide the roller brush (41).

5. The casting slag fume atomization dust reduction device according to claim 4, characterized in that: A mounting plate (5) is fixedly connected to the top of one end of the sedimentation tank (3); a cylinder (51) is fixedly connected to the mounting plate (5); a moving axis of the cylinder (51) is fixedly connected to a transverse plate (52); connecting plates (53) are fixedly connected to both ends of the transverse plate (52); two connecting plates (53) are provided; the connecting plates (53) are rotatably connected to the roller brush (41); and the cylinder (51) is used to drive the roller brush (41) to move.

6. The casting slag fume atomization dust reduction device according to claim 5, characterized in that: A rack (6) is fixedly connected to the vertical plate (421) facing the interior of the sedimentation tank (3); gears (61) are fixedly connected to both ends of the roller brush (41); the gears (61) are meshed and connected with the rack (6); and the rack (6) is used for the roller brush (41) to rotate.

7. The casting slag fume atomization dust reduction device according to claim 6, characterized in that: The other end of the dust collecting pipe (12) is connected to a washing tower, which is in turn connected to a chimney; the flue gas that has passed through the dust collecting hood (11) and the spray assembly (2) and has been dusted enters the washing tower, and is discharged from the chimney after being washed by the washing tower.

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