Scrap steel efficient regeneration nodular cast iron smelting device and flue gas treatment system

Abstract

The invention belongs to the technical field of casting, and particularly relates to an efficient scrap steel regeneration nodular cast iron smelting device and flue gas treatment system which comprises an operation rail car, an operation tank, a placement table and a limiting block. A placing table is mounted at the top of the operation rail car; a plurality of groups of limiting blocks are fixedly connected to the top of the placing table; an operation tank is arranged between each group of limiting blocks on the top of the placing table; a pair of first sliding grooves is formed in the position, between each pair of limiting blocks, of the top of the containing table. A reciprocating lead screw is rotationally connected into the first sliding groove. Through the rotating effect of the reciprocating screw rod, the clamping plates can be driven to be attached to the periphery of the operation tank, at the moment, according to the different sizes of the operation tank, the moving angle of the clamping plates is changed according to the sizes of the operation tank, and therefore the operation tank is clamped, and position limitation of the operation tank is completed; and therefore, the phenomenon that molten iron is splashed out due to deviation and sliding caused by gaps on the placing table due to different sizes of the operation tanks is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of casting technology, specifically an efficient regeneration ductile iron melting device for scrap steel and a flue gas treatment system. Background Art

[0002] Scrap steel is a common type of steel waste in modern society. Through ductile iron melting, scrap steel can be melted and cast to re-cast it into parts with complex stress, high requirements for strength, toughness, and wear resistance. By optimizing the proportion of scrap steel and supporting technologies, both cost reduction and efficiency improvement can be achieved, and the development of green casting can be promoted.

[0003] Currently, in the existing technology, after scrap steel is remelted, it can be widely used, almost penetrating all steel-related fields, from traditional construction and automobiles to emerging energy and electronics industries.

[0004] In use, after scrap steel is melted into molten iron, it needs to be transported to an intermediate frequency furnace for subsequent processing by a special tank truck through a track. The different sizes of the tanks result in gaps between the tanks and the vehicle bodies during transportation, causing the tanks to move and the molten iron in the tanks to spill out, posing a safety hazard to the surrounding workers. Therefore, an efficient regeneration ductile iron melting device for scrap steel and a flue gas treatment system are proposed for the above problems. Summary of the Invention

[0005] In order to make up for the deficiencies of the existing technology and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: The efficient regeneration ductile iron melting device for scrap steel of the present invention includes a running rail vehicle, a running tank, a placement table, and limit blocks; a placement table is installed on the top of the running rail vehicle; multiple groups of limit blocks are fixedly connected to the top of the placement table; a running tank is arranged between each group of limit blocks on the top of the placement table; a pair of first chutes are opened between each pair of limit blocks on the top of the placement table; a reciprocating lead screw is rotatably connected inside the first chute; a positioning rod is connected to the lead screw nut pair in the middle of the reciprocating lead screw; clamping plates are fixedly connected to the tops of a pair of the positioning rods.

[0007] Preferably, a rubber impeller is rotatably connected inside the limit block; a second chute is opened on the top surface of the placement table below the limit block; reinforcing ribs are fixedly connected above and below the placement table between a pair of the positioning rods; multiple groups of third chutes are opened between a pair of first chutes on the top surface of the placement table; multiple groups of limit columns are rotatably connected to the bottom surface of the placement table; connecting ropes are wound around the two sides of the rotating shaft of the rubber impeller, and the connecting ropes pass through the second chute and are in contact with the limit columns and fixedly connected to the side walls of the reinforcing ribs below the placement table.

[0008] The flue gas treatment system of the high-efficiency regenerative ductile iron melting device for scrap steel is characterized in that: this system is applicable to the high-efficiency regenerative ductile iron melting device for scrap steel mentioned above, and includes a power supply module, a flue gas absorption module, a temperature control module, a flue gas treatment module, and a flue gas storage module. The power supply module is connected to the flue gas treatment module and the flue gas absorption module through circuits. The flue gas absorption module is communicated with the flue gas treatment module. The temperature control module is installed on the flue gas absorption module. The flue gas treatment module is communicated with the flue gas storage module.

[0009] Preferably, the flue gas absorption module includes a flue. The flue is opened at the top of the clamping plate. A cooling box is fixedly connected to the middle of a pair of the positioning rods. A plurality of copper pipes are communicated between the flue and the cooling box. After passing through the bottom of the cooling box, the copper pipes are communicated with a rubber pipe. The rubber pipe passes through the third sliding groove and is communicated to the flue gas treatment module. The inside of the cooling box is filled with a coolant. A plurality of radiating fins are fixedly connected to both sides of the cooling box, and the ends of the radiating fins pass through the cooling box and are in contact with the internal coolant.

[0010] Preferably, the temperature control module includes a fan. The fan is fixedly connected to the side wall of the cooling box and is located between each pair of radiating fins. Baffles are fixedly connected to the side wall of the cooling box on both sides of the radiating fins. A limiting ring is fixedly connected to the inner side wall of the cooling box between each pair of radiating fins. A shape memory alloy is filled in the middle of the limiting ring. A pushing column is slidably connected to both ends of the limiting ring, and the end of the pushing column is in contact with the radiating fin. A rubber pad is filled between the radiating fin and the cooling box.

[0011] Preferably, a first fitting block is fixedly connected to the side wall of each of the plurality of radiating fins inside the rubber pad. A second fitting block is fixedly connected to the side wall of the rubber pad at a position corresponding to the first fitting block. The first fitting block and the second fitting block are fitted together. A ball is ball-jointed to the end of the pushing column, and the side wall of the ball is in contact with the radiating fin. There is a water filling port at the top of the cooling box.

[0012] Preferably, the flue gas treatment module includes a flue gas chamber. A plurality of limiting plates are fixedly connected to the inside of the flue gas chamber. The space inside the flue gas chamber is separated by the limiting plates to form a flue. The bottom of the rubber pipe is communicated with the side wall of the flue gas chamber. Activated carbon plates are fixedly connected to both sides of the middle flue inside the flue gas chamber. A first blocking plate is fixedly connected to the middle of the activated carbon plate, and the first blocking plate is in contact with the side wall of the limiting plate. Scroll fans are provided on both sides of the middle flue in the flue gas chamber. Filter screens are fixedly connected to the side wall of the middle flue on both sides of the scroll fan.

[0013] Preferably, a plurality of atomizing nozzles are fixedly connected to both sides of the middle flue on the side wall of the limiting plate, and the atomizing nozzles are arranged in a staggered manner; a plurality of hydrophobic holes are formed in the middle flue inside the flue gas chamber; a storage tank is fixedly connected to the bottom of the flue gas chamber, and the top opening of the storage tank is located below the hydrophobic holes; the water pipes on both sides of the hydrophobic holes can be connected to a water circulation system.

[0014] Preferably, a triangular plate is fixedly connected to the bottom of the storage tank; a second blocking plate is fixedly connected to the inner side wall of the storage tank above the triangular plate, and the top of the second blocking plate is arranged in an inclined surface; a guiding plate is fixedly connected to the side wall of the bottom opening of the storage tank; the guiding plate is arranged in an inclined shape; the water pipes on both sides of the storage tank are located above the second blocking plate.

[0015] Preferably, a plurality of rotating shafts are rotatably connected to the position where the reinforcing ribs are located in the third sliding groove; receiving bins are fixedly connected to both sides of the bottom of the placing table, and one end of a rubber film is wound inside the receiving bin through a torsion spring; the other end of the rubber film is fixedly connected to the side wall of the reinforcing rib at the bottom of the placing table.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention provides a high-efficiency regenerative ductile iron melting device and a flue gas treatment system for scrap steel. Through the rotation effect of the reciprocating screw rod, the clamping plate can be driven to fit around the operation tank. At this time, according to the different sizes of the operation tank, the clamping plate can change the moving angle according to the size of the operation tank, so as to clamp the operation tank and complete the position limitation of the operation tank, thereby reducing the offset and sliding caused by the gap on the placing table due to different sizes of the operation tank, and thus preventing the molten iron from splashing out. 2. The present invention provides a high-efficiency regenerative ductile iron melting device and a flue gas treatment system for scrap steel. Through the moving effect of the positioning rod, when the clamping effect around the operation tank is completed, the rubber impeller can be driven to rotate to limit the top of the pipeline at the bottom of the operation tank. At the same time, the friction force on the pipeline at the bottom of the operation tank is increased through the material of the rubber impeller, and the limitation of the operation tank is completed in cooperation with the clamping plate, reducing the movement and shaking of the operation tank and increasing the stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a three-dimensional view of the present invention; Figure 2 is a three-dimensional view of the clamping plate of the present invention; Figure 3 is a system flow chart of the present invention; Figure 4 is a structural schematic diagram of the cooling box of the present invention; Figure 5 Schematic diagram of the internal structure of the operation rail vehicle of the present invention; Figure 6 Schematic diagram of the structure of the exhaust gas bin of the present invention.

[0018] Legend: 1. Operation rail vehicle; 11. Operation tank; 12. Placing table; 13. Limit block; 14. First chute; 15. Reciprocating lead screw; 16. Positioning rod; 17. Clamping plate; 2. Rubber impeller; 21. Second chute; 22. Reinforcing rib; 23. Third chute; 24. Connecting rope; 25. Limit post; 3. Flue; 31. Copper pipe; 32. Cooling box; 33. Rubber pipe; 34. Radiating fin; 4. Baffle; 41. Fan; 42. Limit ring; 43. Pushing column; 44. Shape memory alloy; 5. Rubber pad; 51. First fitting block; 52. Second fitting block; 53. Ball; 6. Flue gas bin; 61. Limit plate; 62. Activated carbon plate; 63. First blocking plate; 64. Filter screen; 65. Scroll fan; 7. Atomizing nozzle; 71. Storage tank; 72. Drainage hole; 8. Guide plate; 81. Second blocking plate; 82. Triangular plate; 9. Rotating shaft; 91. Storage bin; 92. Rubber film. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figures 1-5As shown in the figure, an efficient waste steel recycled ductile iron melting device includes a running rail car 1, a running tank 11, a placement table 12, and a limiting block 13. The top of the running rail car 1 is fixedly connected with a placement table 12. Multiple groups of limiting blocks 13 are fixedly connected to the top of the placement table 12. A running tank 11 is arranged between each group of limiting blocks 13 on the top of the placement table 12. A pair of first chutes 14 are opened between each pair of limiting blocks 13 on the top of the placement table 12. A reciprocating lead screw 15 is rotatably connected inside the first chute 14. A positioning rod 16 is connected to the middle of the reciprocating lead screw 15 through a screw nut pair. Clamping plates 17 are fixedly connected to the tops of a pair of the positioning rods 16. During operation, when melting waste steel ductile iron, the molten iron needs to be transported back and forth for secondary treatment. At this time, the molten iron after melting is poured into the running tank 11 for temporary storage and transported by the running rail car 1. At this time, according to the different sizes of the running tank 11, the rotation effect of the reciprocating lead screw 15 can be used to drive the positioning rod 16 to move, so that a pair of clamping plates 17 wrap and limit the periphery of the running tank 11. Furthermore, during the transportation process of the running rail car 1, a pair of clamping plates 17 are used to limit the periphery of the running tank 11 to keep the running tank 11 stable. In this step, through the rotation effect of the reciprocating lead screw 15, the clamping plates 17 can be driven to fit the periphery of the running tank 11. At this time, according to the different sizes of the running tank 11, the clamping plates 17 are made to change the moving angle according to the size of the running tank 11, so as to clamp the running tank 11 and complete the position limitation of the running tank 11, thereby reducing the offset and sliding caused by the existence of gaps on the placement table 12 due to different sizes of the running tank 11, and thus preventing the molten iron from splashing out.

[0021] Please refer to Figures 1-2As shown, the limit block 13 is internally connected with a rubber impeller 2 for rotation; the top surface of the placing platform 12 is provided with a No. 2 slide groove 21 below the limit block 13; a pair of the positioning rods 16 are provided with reinforcing ribs 22 above and below the placing platform 12; the top surface of the placing platform 12 is provided with a plurality of groups of No. 3 slide grooves 23 between a pair of No. 1 slide grooves 14; the bottom surface of the placing platform 12 is connected with a plurality of groups of limit columns 25 for rotation; connecting ropes 24 are wound around the rotating shafts on both sides of the rubber impeller 2, and the connecting ropes 24 pass through the No. 2 slide groove 21 and contact the limit columns 25 to be fixed to the side walls of the reinforcing ribs 22 below the placing platform 12; during operation, in the process of fixing the operating tank 11, the clamping plate 17 will change its position according to the size of the operating tank 11, and at the same time The movement of the positioning rod 16 will drive the reinforcing rib 22 to move. At this time, the movement of the reinforcing rib 22 will drive the connecting rope 24 to produce a pulling effect, so that the middle part of the connecting rope 24 is pulled along the limiting column 25 as the bending point, so that the rubber impeller 2 rotates, and the rubber impeller 2 limits the pipeline placed between a pair of limiting blocks 13 at the bottom of the operating tank 11. In this step, the movement effect of the positioning rod 16 is used to complete the clamping effect around the operating tank 11, and the rubber impeller 2 can be driven to rotate to limit the top of the bottom pipeline of the operating tank 11. At the same time, the material of the rubber impeller 2 increases the friction force on the bottom pipeline of the operating tank 11, and cooperates with the clamping plate 17 to complete the restriction of the operating tank 11, reduce the movement and shaking of the operating tank 11, and increase stability.

[0022] See also Figure 3 As shown, the flue gas treatment system of the scrap steel efficient regeneration ductile iron smelting device is characterized in that: the system is suitable for the above-mentioned scrap steel efficient regeneration ductile iron smelting device, including a power supply module, a flue gas absorption module, a temperature control module, a flue gas treatment module, and a flue gas storage module: the power supply module is connected to the flue gas treatment module and the flue gas absorption module through a circuit; the flue gas absorption module is communicated with the flue gas treatment module; a temperature control module is installed on the flue gas absorption module; the flue gas treatment module and the flue gas storage module are communicated.

[0023] See also Figures 2-4As shown in the figure, the flue gas absorption module includes a flue 3; a flue 3 is provided at the top of the clamping plate 17; a cooling box 32 is fixedly connected to the middle of a pair of the positioning rods 16; a plurality of copper tubes 31 are communicated between the flue 3 and the cooling box 32; the copper tubes 31 penetrate through the bottom of the cooling box 32 and are communicated with a rubber tube 33; the rubber tube 33 penetrates through the third sliding groove 23 and is communicated to the flue gas treatment module; the inside of the cooling box 32 is filled with a coolant; a plurality of heat dissipation fins 34 are fixedly connected to both sides of the cooling box 32, and the ends of the heat dissipation fins 34 penetrate through the cooling box 32 and are in contact with the internal coolant; during operation, when the transfer tank 11 transports the molten iron, corresponding movements are required according to different subsequent treatment positions. At this time, the flue gas generated by the molten iron under the action of heat will float upward until it is diluted with the air. There are some harmful substances in the flue gas, which will cause a certain degree of harm to the surrounding staff. At this time, when the clamping plate 17 restricts the transfer tank 11, the flue 3 provided at the top of the clamping plate 17 can be communicated with the cooling box 32 through the copper tubes 31 and the flue gas treatment module, and a suction force is generated on the upward floating flue gas, so that the flue gas enters the flue gas treatment module through the copper tubes 31 and the cooling box 32 for preliminary treatment to reduce harmful components. At the same time, because the initial temperature of the flue gas is relatively high, it can be cooled inside the cooling box 32 through the copper tubes 31 and then enter the rubber tube 33 to reduce the damage to the rubber tube 33. This step, through the opening of the flue 3 at the top of the clamping plate 17, can drive the flue gas into the inside of the copper tubes 31 and the rubber tube 33 through the absorption effect of the flue gas treatment module and transport it to the inside of the flue gas treatment module for treatment, reducing the harm caused by the direct floating of the flue gas to the safety of the surrounding staff. At the same time, the presence of the cooling box 32 is used to cool the temperature of the copper tubes 31 and the internal flue gas, reducing the influence of overheated flue gas on the rubber tube 33.

[0024] Please refer to Figure 4As shown, the temperature control module includes a fan 41; the fan 41 is fixedly connected to the side wall of the cooling box 32 and is located between each pair of heat sinks 34; baffles 4 are fixedly connected to both sides of the heat sinks 34 on the side wall of the cooling box 32; limiting rings 42 are fixedly connected to the inner side wall of the cooling box 32 between each pair of heat sinks 34; a shape memory alloy 44 is filled in the middle of the limiting ring 42; a push column 43 is slidably connected to both ends of the limiting ring 42, and the end of the push column 43 is in contact with the heat sink 34; a rubber pad 5 is filled between the heat sink 34 and the cooling box 32; during operation, in the normal absorption process of the flue gas, as the high-temperature flue gas contacts the coolant inside the cooling box 32 for a long time, the temperature of the coolant inside the cooling box 32 will gradually increase, resulting in a weakened cooling effect. At this time, the fan 41 can rotate to accelerate the heat exchange between the heat sink 34 and the coolant through the wind force. At the same time, as the temperature further increases, the shape memory alloy 44 will deform under the action of thermal expansion and contraction, generating a pushing effect on the push column 43, causing the push column 43 to push the end of the heat sink 34, so that the heat sink 34 generates an angular change under the action of the rubber pad 5, making the ends of a pair of heat sinks 34 gradually approach. At this time, due to the blocking of the baffle 4, the air outlet of the fan 41 is reduced due to the mutual approach of a pair of heat sinks 34, resulting in an increase in air flow velocity and an increase in the heat exchange effect of the heat sink 34. This step, through the heat sink 34 installed on the side wall of the cooling box 32, can change the effect of the heat sink 34 through the pushing effect of the push column 43 when the temperature of the coolant inside the cooling box 32 increases, so as to increase the wind flow velocity blown by the fan 41, thereby accelerating the heat exchange effect between the heat sink 34 and the coolant, and further making the temperature inside the cooling box 32 increase, adaptively accelerating the heat exchange effect of the heat sink 34, accelerating the drop in the coolant temperature, and maintaining the cooling treatment of the flue gas.

[0025] Please refer to Figure 4As shown, multiple groups of side walls of the heat sink 34 are located inside the rubber pad 5 and are fixedly connected to the first fitting block 51; the side wall of the rubber pad 5 is located at a position corresponding to the first fitting block 51 and is fixedly connected to the second fitting block 52; the first fitting block 51 and the second fitting block 52 fit together; the end of the push column 43 is ball-connected with a ball 53, and the side wall of the ball 53 is in contact with the heat sink 34; there is a water filling port on the top of the cooling box 32; when working, when the push column 43 produces a pushing effect on the heat sink 34, as the angle of the heat sink 34 changes, the distance between the first fitting block 51 and the second fitting block 52 on one side will gradually When the angle of the heat sink 34 is changed, a gap is created by pulling away. At this time, the coolant inside the cooling box 32 can slowly seep out from the gap and gradually flow on the heat sink 34, and then evaporates by contacting with the wind blown by the fan 41. At the same time, the rolling contact between the ball 53 and the heat sink 34 can reduce the contact area, thereby increasing the contact area between the heat sink 34 and the coolant. In this step, the gap left by the No. 1 mating block 51 and the No. 2 mating block 52 when the angle of the heat sink 34 changes can allow part of the coolant to gradually seep out, so that the air blown by the fan 41 plus the evaporation effect of the seeping coolant can use the evaporation of the coolant to take away a large amount of heat, thereby accelerating the cooling effect.

[0026] See also Figures 5-6 As shown, the flue gas treatment module includes a flue gas bin 6; a plurality of groups of limit plates 61 are fixedly connected inside the flue gas bin 6, and the internal space of the flue gas bin 6 is divided by the limit plates 61 to form a flue; the bottom of the rubber tube 33 is connected to the side wall of the flue gas bin 6; the flue gas bin 6 is fixedly connected with activated carbon plates 62 on both sides of the middle flue; a No. 1 blocking plate 63 is fixedly connected in the middle of the activated carbon plate 62, and the No. 1 blocking plate 63 is in contact with the side wall of the limit plate 61; turbo fans 65 are provided on both sides of the middle flue of the flue gas bin 6; filters 64 are fixedly connected to the side walls of the middle flue on both sides of the turbo fan 65; when working, during the absorption process of the flue gas, as the flue gas moves along the rubber tube 33, it will enter the inside of the flue gas bin 6. At this time, the flue gas entering the flue gas bin 6 will form a The flue gas moves, and the activated carbon plate 62 installed at the bottom of the flue will absorb some harmful substances and particulate matter in the flue gas. At the same time, during the movement of the flue gas, part of the flue gas will be blocked by the No. 1 blocking plate 63. At this time, the impurities inside the flue gas with a slower flow rate at the bottom gradually sink and contact the activated carbon plate 62. The subsequent flue gas can be discharged into the cavity between the smoke bin 6 and the operating rail car 1 and the smoke storage module for storage after being filtered twice by the filter 64, waiting for discharge. In this step, the smoke can be initially treated by storing the smoke in the smoke bin 6, and the activated carbon plate 62, the No. 1 blocking plate 63 and the filter 64 are used to absorb and filter the harmful substances and particulate matter in the smoke, thereby reducing the damage caused by direct smoke discharge and human contact.

[0027] See alsoFigure 6 As shown, on both sides of the middle flue in the side wall of the limit plate 61, a plurality of atomizing nozzles 7 are fixedly connected, and the atomizing nozzles 7 are arranged in a staggered manner; a plurality of hydrophobic holes 72 are opened in the middle flue inside the flue gas chamber 6; at the bottom of the flue gas chamber 6, a storage tank 71 is fixedly connected, and the top opening of the storage tank 71 is located below the hydrophobic holes 72; water pipes on both sides of the hydrophobic holes 72 can be connected to the water circulation system; during operation, the flue gas inside the flue gas chamber 6 smoothly passes through the activated carbon plate 62 and the first baffle plate 63 and then enters the middle flue. At this time, under the action of the atomizing nozzles 7, water mist is sprayed to perform secondary treatment on the harmful substances and particulate matters existing in the flue gas. The falling water will enter the hydrophobic holes 72 and flow into the storage tank 71 for storage. Subsequently, it can be sprayed again by the atomizing nozzles 7 through the water circulation system. Through the water mist spraying effect of the middle flue inside the flue gas chamber 6 in this step, the harmful substances and particulate matters in the flue gas can be further reduced, the flue gas is subjected to secondary treatment, and the harm to the staff is reduced.

[0028] Please refer to Figure 6 As shown, a triangular plate 82 is fixedly connected to the bottom of the storage tank 71; a second baffle plate 81 is fixedly connected to the inner side wall of the storage tank 71 above the triangular plate 82, and the top of the second baffle plate 81 is arranged in an inclined plane; a guiding plate 8 is fixedly connected to the side wall of the bottom opening of the storage tank 71; the guiding plate 8 is arranged in an inclined shape; the water pipes on both sides of the storage tank 71 are located above the second baffle plate 81; during operation, under the spraying action of the atomizing nozzles 7, water droplets will gradually drip from the hydrophobic holes 72. At this time, the inclination angle of the guiding plate 8 can guide the water droplets to flow into the middle of the storage tank 71. At this time, as the water inside the storage tank 71 gradually increases, the water level will gradually rise. At this time, when the water level is higher than the water pipes on both sides of the storage tank 71, the water circulation system starts to absorb the water inside the storage tank 71 to make the water level drop to be flush with the second baffle plate 81. During the accumulation of water, the triangular plate 82 and the second baffle plate 81 can make the flue gas impurities existing in the water move to both sides of the storage tank 71 to reduce the situation of floating upward. Through the blocking effect of the second baffle plate 81 in this step, the occurrence of the situation that impurities in the water enter the water circulation system through the pipeline and cause long-term pipeline blockage can be reduced.

[0029] Please refer to Figures 2-4As shown, multiple sets of rotating shafts 9 are rotatably connected to the position where the reinforcing rib 22 is located at the third chute 23; both sides of the bottom of the placement table 12 are fixedly connected with storage bins 91, and one end of a rubber film 92 is wound inside the storage bin 91 through a torsion spring; the other end of the rubber film 92 is fixedly connected to the side wall of the reinforcing rib 22 at the bottom of the placement table 12; during operation, when the positioning rod 16 moves, it will cause the rubber tube 33 to come into contact with the rotating shaft 9, reducing the frictional force through the rolling friction of the rotating shaft 9. At the same time, after clamping the operating tank 11, the rubber film 92 will be pulled to seal the third chute 23, reducing the discharge of flue gas, so that the flue gas stays between the flue gas chamber 6 and the operating rail car 1. This step, through the covering effect of the rubber film 92 on the third chute 23, can reduce the upward discharge of flue gas, reduce the discharge volume, make part of the flue gas stay between the flue gas chamber 6 and the operating rail car 1, cause the flue gas to precipitate, and make the particulate matter move downward for the third treatment.

[0030] Working principle: When melting waste steel spheroidal graphite cast iron, the molten iron needs to be transported back and forth for secondary treatment. At this time, the molten iron after melting is poured into the operating tank 11 for temporary storage and transported by the operating rail car 1. At this time, according to the different sizes of the operating tank 11, the rotation effect of the reciprocating screw rod 15 can be used to drive the positioning rod 16 to move, so that a pair of clamping plates 17 wrap and restrict the periphery of the operating tank 11. Then, during the transportation of the operating rail car 1, a pair of clamping plates 17 are used to restrict the periphery of the operating tank 11 to keep the operating tank 11 stable. During the fixing process of the operating tank 11, the clamping plates 17 will change their positions according to the size of the operating tank 11. At the same time, the movement of the positioning rod 16 will drive the reinforcing rib 22 to displace. At this time, the movement of the reinforcing rib 22 will drive the connecting rope 24 to produce a pulling effect, causing the middle part of the connecting rope 24 to be pulled with the limit post 25 as the bending point, making the rubber impeller 2 rotate, and making the rubber impeller 2 restrict the pipe placed between a pair of limit blocks 13 at the bottom of the operating tank 11. When the operating tank 11 transports the molten iron, corresponding movements are required according to the different subsequent treatment positions. At this time, the flue gas generated by the molten iron under the action of heat will float upward until it is diluted with the air, and there are some harmful substances in the flue gas, which will cause a certain degree of harm to the surrounding staff. At this time, when the clamping plate 17 restricts the operating tank 11, the flue duct 3 opened on the top of the clamping plate 17 can be connected to the flue gas treatment module through the copper pipe 31 and the cooling box 32, using suction to generate suction on the upward floating flue gas, making the flue gas enter the flue gas treatment module through the copper pipe 31 and the cooling box 32 for preliminary treatment to reduce harmful components. At the same time, because the initial temperature of the flue gas is relatively high, it can be cooled inside the cooling box 32 through the copper pipe 31 and then enter the rubber pipe 33 to reduce the damage to the rubber pipe 33; During the normal absorption of flue gas, as the high-temperature flue gas comes into contact with the coolant inside the cooling tank 32 for a long time, the temperature of the coolant inside the cooling tank 32 will gradually increase, which will in turn lead to a weakened cooling effect. At this time, the fan 41 can rotate to accelerate the heat exchange between the heat sink 34 and the coolant through the wind. At the same time, as the temperature further rises, the shape memory alloy 44 will deform under the action of thermal expansion and contraction, generating a pushing effect on the pushing column 43, causing the pushing column 43 to push the end of the heat sink 34, so that the heat sink 34 changes its angle under the action of the rubber pad 5, making the ends of a pair of heat sinks 34 gradually approach. At this time, due to the blocking of the baffle 4, the air outlet of the fan 41 shrinks due to the approaching of a pair of heat sinks 34, which in turn leads to an increase in air flow rate and an increase in the heat exchange effect of the heat sink 34. When the pushing column 43 generates a pushing effect on the heat sink 34, as the angle of the heat sink 34 changes, the distance between the first fitting block 51 and the second fitting block 52 on one side will gradually widen to create a gap. At this time, the coolant inside the cooling tank 32 can slowly seep out from the gap and gradually flow on the heat sink 34, and then evaporate when it comes into contact with the wind blown by the fan 41. At the same time, the rolling contact between the ball 53 and the heat sink 34 can reduce the contact area, thereby increasing the contact area between the heat sink 34 and the coolant. During the absorption of flue gas, as the flue gas moves along the rubber tube 33 and then enters the flue gas chamber 6. At this time, the flue gas entering the flue gas chamber 6 will move along the flue formed by the limiting plate 61. The activated carbon plate 62 installed at the bottom of the flue will absorb some harmful substances and particulate matters existing in the flue gas. At the same time, during the movement of the flue gas, some flue gas will be blocked by the first baffle 63. At this time, the impurities in the flue gas with a slower flow rate at the bottom gradually sink and come into contact with the activated carbon plate 62. The subsequent flue gas can be discharged to the cavity existing between the flue gas chamber 6 and the running rail car 1 and the flue gas storage module for storage after being filtered twice by the filter screen 64, waiting for discharge; Inside the flue gas chamber 6, after the flue gas smoothly passes through the activated carbon plate 62 and the first baffle plate 63, it enters the middle flue. At this time, under the action of the atomizing nozzle 7, water mist is sprayed to perform secondary treatment on the harmful substances and particulate matter existing in the flue gas. The falling water will enter the hydrophobic holes 72 and flow into the storage tank 71 for storage. Subsequently, it can be sprayed again by the atomizing nozzle 7 through the water circulation system. Under the spraying action of the atomizing nozzle 7, water droplets will gradually drip from the hydrophobic holes 72. At this time, the inclination angle of the guiding plate 8 can guide the water droplets so that they flow into the middle of the storage tank 71. At this time, as the water in the storage tank 71 gradually increases, the water level will gradually rise. At this time, when the water level is higher than the water pipes on both sides of the storage tank 71, the water circulation system starts to absorb the water in the storage tank 71, making its water level drop to be flush with the second baffle plate 81. During the accumulation of water, the triangular plate 82 and the second baffle plate 81 can make the flue gas impurities existing in the water move towards both sides of the storage tank 71, reducing the situation of floating upwards. During the movement of the positioning rod 16, the rubber tube 33 will contact the rotating shaft 9, reducing the frictional force through the rolling friction of the rotating shaft 9. At the same time, after clamping the operating tank 11, the rubber membrane 92 will be pulled to seal the third sliding groove 23, reducing the discharge of flue gas, so that the flue gas stays between the flue gas chamber 6 and the operating rail car 1.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. High-efficiency regenerative ductile iron melting device for scrap steel, comprising a running rail car (1), a running tank (11), a placing table (12), and a limiting block (13); a placing table (12) is fixedly connected to the top of the running rail car (1); multiple groups of limiting blocks (13) are fixedly connected to the top of the placing table (12); a running tank (11) is arranged between each group of limiting blocks (13) on the top of the placing table (12); it is characterized in that: At the top of the placement table (12), a pair of first sliding grooves (14) are opened between each pair of limiting blocks (13); a reciprocating lead screw (15) is rotatably connected inside the first sliding groove (14); a positioning rod (16) is connected to the middle screw nut pair of the reciprocating lead screw (15); clamping plates (17) are fixedly connected to the tops of a pair of the positioning rods (16).

2. The high-efficiency recycled ductile iron melting device for scrap steel according to claim 1, characterized in that: A rubber impeller (2) is rotatably connected inside the limiting block (13); a second sliding groove (21) is opened on the top surface of the placement table (12) below the limiting block (13); reinforcing ribs (22) are fixedly connected above and below the placement table (12) between a pair of the positioning rods (16); a plurality of third sliding grooves (23) are opened on the top surface of the placement table (12) between a pair of first sliding grooves (14); a plurality of limiting columns (25) are rotatably connected to the bottom surface of the placement table (12); connection ropes (24) are wound around the two side rotating shafts of the rubber impeller (2), and after passing through the second sliding groove (21), the connection ropes (24) are in contact with the limiting columns (25) and are fixedly connected to the side walls of the reinforcing ribs (22) below the placement table (12).

3. Flue gas treatment system for the high-efficiency recycled ductile iron melting device of scrap steel, which is applicable to the high-efficiency recycled ductile iron melting device of scrap steel described in the above-mentioned claim 2, and is characterized in that: It includes a power supply module, a flue gas absorption module, a temperature control module, a flue gas treatment module, and a flue gas storage module: the power supply module is connected to the flue gas treatment module and the flue gas absorption module through circuits; the flue gas absorption module is communicated with the flue gas treatment module; a temperature control module is installed on the flue gas absorption module; the flue gas treatment module is communicated with the flue gas storage module.

4. The flue gas treatment system of the waste steel high-efficiency regenerative ductile iron melting device according to claim 3, characterized in that: The flue gas absorption module includes a flue (3); a flue (3) is opened at the top of the clamping plate (17); a cooling box (32) is fixedly connected to the middle of a pair of the positioning rods (16); a plurality of copper tubes (31) are communicated between the flue (3) and the cooling box (32); after passing through the bottom of the cooling box (32), the copper tubes (31) are communicated with a rubber tube (33); the rubber tube (33) passes through the third sliding groove (23) and is communicated to the flue gas treatment module; a coolant is filled inside the cooling box (32); a plurality of heat dissipation fins (34) are fixedly connected to both sides of the cooling box (32), and the ends of the heat dissipation fins (34) pass through the cooling box (32) and are in contact with the internal coolant.

5. The flue gas treatment system of the scrap steel high-efficiency regenerative ductile iron melting device according to claim 4, wherein: The temperature control module includes a fan (41); the fan (41) is fixedly connected to the side wall of the cooling box (32) and is located between each pair of heat dissipation fins (34); baffles (4) are fixedly connected to both sides of the heat dissipation fins (34) on the side wall of the cooling box (32); limiting rings (42) are fixedly connected to the inner side wall of the cooling box (32) between each pair of heat dissipation fins (34); a shape memory alloy (44) is filled in the middle of the limiting ring (42); a push column (43) is slidably connected to both ends of the limiting ring (42), and the end of the push column (43) is in contact with the heat dissipation fin (34); a rubber pad (5) is filled between the heat dissipation fin (34) and the cooling box (32).

6. The flue gas treatment system of the waste steel high-efficiency regenerative ductile iron melting device according to claim 5, characterized in that: On the side walls of multiple groups of the heat sinks (34) located inside the rubber pad (5), a first fitting block (51) is fixedly connected; on the side wall of the rubber pad (5) at a position corresponding to the first fitting block (51), a second fitting block (52) is fixedly connected; the first fitting block (51) and the second fitting block (52) are fitted to each other; the end of the push column (43) is ball-jointed with a ball (53), and the side wall of the ball (53) is in contact with the heat sink (34); there is a water filling port at the top of the cooling box (32).

7. The flue gas treatment system of the scrap steel high-efficiency regenerative ductile iron melting device according to claim 4, characterized in that: The flue gas treatment module includes a flue gas chamber (6); multiple groups of limiting plates (61) are fixedly connected inside the flue gas chamber (6), and the internal space of the flue gas chamber (6) is partitioned by the limiting plates (61) to form a flue; the bottom of the rubber tube (33) is communicated with the side wall of the flue gas chamber (6); activated carbon plates (62) are fixedly connected on both sides of the middle flue inside the flue gas chamber (6); a first blocking plate (63) is fixedly connected to the middle of the activated carbon plate (62), and the first blocking plate (63) is in contact with the side wall of the limiting plate (61); vortex fans (65) are provided on both sides of the middle flue in the flue gas chamber (6); filter meshes (64) are fixedly connected to the side walls of the middle flue on both sides of the vortex fans (65).

8. The flue gas treatment system of the waste steel high-efficiency recycled ductile iron melting device according to claim 7, characterized in that: On the side walls of the limiting plates (61) on both sides of the middle flue, multiple groups of atomizing nozzles (7) are fixedly connected, and the atomizing nozzles (7) are arranged in a staggered manner; multiple groups of water drainage holes (72) are opened in the middle flue inside the flue gas chamber (6); a storage tank (71) is fixedly connected to the bottom of the flue gas chamber (6), and the top opening of the storage tank (71) is located below the water drainage holes (72); the water pipes on both sides of the water drainage holes (72) can be connected to the water circulation system.

9. The flue gas treatment system of the high-efficiency recycled ductile iron melting device for scrap steel according to claim 8, wherein: A triangular plate (82) is fixedly connected to the bottom of the storage tank (71); a second blocking plate (81) is fixedly connected to the inner side wall of the storage tank (71) above the triangular plate (82), and the top of the second blocking plate (81) is inclined; a guiding plate (8) is fixedly connected to the side wall of the bottom opening of the storage tank (71); the guiding plate (8) is arranged in an inclined shape; the water pipes on both sides of the storage tank (71) are above the second blocking plate (81).

10. The flue gas treatment system of the high-efficiency regenerative ductile iron melting device for scrap steel according to claim 3, characterized in that: Multiple groups of rotating shafts (9) are rotatably connected to the position of the third sliding groove (23) of the reinforcing rib (22); storage bins (91) are fixedly connected to both sides of the bottom of the placing table (12), and one end of a rubber film (92) is wound inside the storage bin (91) through a torsion spring; the other end of the rubber film (92) is fixedly connected to the side wall of the reinforcing rib (22) at the bottom of the placing table (12).

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