Ring type smelting slag dry treatment and waste heat recovery device

Abstract

The utility model discloses a ring-type smelting slag dry-process treatment and waste heat recovery device. Comprising an annular rotary frame, and bearing riding wheels are arranged below the rotary frame; supporting bent rails are arranged on the inner sides of the bearing riding wheels; a plurality of fan-shaped cooling turning plates are uniformly distributed on the rotary frame; a cooling water pipe or a cooling water jacket is arranged in the cooling turning plate; the same side of each cooling turning plate in the radial direction is hinged to the rotary frame; the bottom of each cooling turning plate is downwards provided with a wheel frame, and the two ends of each wheel frame are provided with rail wheels corresponding to the corresponding supporting inner supporting bent rail and the corresponding supporting outer supporting bent rail. The inner supporting bent rail and the outer supporting bent rail form a downwards-concave section at the preset position. A rotary water supply joint is arranged at the central position of the rotary frame; a water supply pipe and a water return pipe are arranged between the rotary water supply joint and the rotary frame; the stator part of the rotary water supply connector is used for being connected with a water supply pipe. The smelting treatment speed is high, and waste heat can be utilized for power generation.

Description

Technical Field

[0001] This utility model relates to a ring-type dry treatment and waste heat recovery device for smelting slag. Background Technology

[0002] There are many types of slag after smelting, including iron slag, steel slag, and stainless steel slag. Due to incomplete technology, smelting slag was often rejected by smelters and became a burden. With the advancement of technology, various smelting slags have gradually become valuable resources, turning waste into treasure. After various slag treatment processes, they are reused and, after multiple screenings, are handed over to different application scenarios for processing and utilization. Currently, the main slag treatment processes focus on hot quenching, hot pouring, crushing, screening, and magnetic separation, rarely utilizing the heat energy inherent in the slag itself. Smelting slag has an extremely high calorific value, with liquid slag reaching temperatures of over 1,000 degrees Celsius. Even after crushing, it still retains several hundred degrees Celsius. This high heat energy is simply lost and wasted as it is left to cool. Utility Model Content

[0003] To overcome the above-mentioned defects, the purpose of this utility model is to provide a ring-type dry treatment and waste heat recovery device for smelting slag.

[0004] To achieve the above objectives, a ring-type dry treatment and waste heat recovery device for smelting slag includes:

[0005] The circular slewing frame has several inner and outer load-bearing rollers installed below it.

[0006] A drive unit for driving the slewing frame to rotate;

[0007] An inner support curved rail is provided on the outer side of the inner ring load-bearing roller; and an outer support curved rail is provided on the inner side of the outer ring load-bearing roller;

[0008] The inner and outer support curved tracks are set concentrically;

[0009] Several fan-shaped cooling flaps are evenly distributed on the slewing frame; cooling water pipes or cooling water jackets are installed inside the cooling flaps; the cooling water pipes or cooling water jackets are provided with inlets and outlets.

[0010] Each cooling flap is hinged to the same side of the slewing frame in the radial direction; each cooling flap has a wheel frame at the bottom facing downwards, and the two ends of the wheel frame are equipped with track wheels corresponding to the inner support curved rail and the outer support curved rail.

[0011] The inner and outer support curved rails form a concave section at a predetermined position;

[0012] When the cooling flap moves to the concave section under the drive of the slewing frame, the track wheel below the cooling flap moves along the concave section under the action of gravity, causing the cooling flap to flip downward at a predetermined angle along the hinge axis; when the cooling flap leaves the concave section under the drive of the slewing frame, the track wheel below the cooling flap gradually moves along the curved track to the ground section.

[0013] A rotary water supply connector is provided at the center of the rotary frame; a water supply pipe and a return water (gas) pipe are provided between the rotary water supply connector and the rotary frame;

[0014] The stator portion of the rotary water supply connector is used to connect to the water supply pipe; the rotor portion of the rotary water supply connector is connected to the rotary frame corresponding to each cooling flap via the water supply pipe; the water supply pipe of the rotary frame is connected to the inlet of the cooling water pipe or cooling water jacket of each cooling flap via a pipe; the return water (air) pipe of the rotary frame is connected to the outlet of the cooling water pipe or cooling water jacket of each cooling flap via a pipe.

[0015] Furthermore, a cantilever bracket is provided on the inner or outer side of the slewing frame, and a dust cover is provided below the cantilever bracket corresponding to the slewing frame.

[0016] Furthermore, a cantilever bracket is provided on one side of the slewing frame; a leveling roller is provided below the cantilever bracket corresponding to the cooling flap.

[0017] Furthermore, a cantilever support is provided on one side of the slewing frame; a crushing roller is provided below the cantilever support corresponding to the cooling flap.

[0018] Furthermore, a cantilever support is provided on one side of the slewing frame; a slag pan tilter is provided on the cantilever support corresponding to the cooling flap;

[0019] Furthermore, the rotary car frame is divided into a slag dumping area, a uniform spreading area, a slag crushing area, and a slag falling area in sequence;

[0020] A cantilever support is provided on one side of the rotary car frame in the slag dumping area; a slag pan tilter is provided on the cantilever support corresponding to the cooling flap;

[0021] One or more cantilever supports are provided on one side of the rotary frame in the evenly spreading area; a leveling roller is provided below the cantilever support corresponding to the cooling flap;

[0022] One or more cantilever supports are provided on one side of the rotary frame in the crushing area; crushing rollers are provided below the cantilever supports corresponding to the cooling flaps;

[0023] The slag drop zone is set in the concave section corresponding to the curved track.

[0024] Furthermore, a slag pit is provided at the foundation corresponding to the concave section, and a material guiding funnel is provided in the slag pit; a pair of crushing rollers are provided at intervals below the material guiding funnel; wherein, at least one crushing roller is connected to a reduction motor.

[0025] Furthermore, guide wheels are provided on the inner and / or outer circumferential surfaces of the slewing frame.

[0026] Furthermore, a waste heat recovery pipe is installed inside the dust cover.

[0027] To achieve the above objectives, the present invention provides a ring-type dry treatment and waste heat recovery method for smelting slag. The method is implemented using the aforementioned apparatus and includes:

[0028] The slewing frame rotates under the drive of the drive unit.

[0029] The slag pan tilter uses electronic control to evenly pour high-temperature liquid slag onto a ring of cooling flaps. The cooling water pipes or cooling water jackets inside the cooling flaps absorb the residual heat of the liquid slag through the inflow and outflow of water to generate steam. The steam and water mixture enters from the rotary water supply joint and is output as steam after passing through the water-steam separation at the top.

[0030] High-temperature liquid slag is leveled by leveling rollers in the even distribution zone;

[0031] After being leveled, the slag is crushed by the crushing rollers in the crushing zone;

[0032] When the cooling flap moves to the concave section of the curved track in the slag drop area, the cooling flap flips downwards, causing the crushed slag to fall into the slag pit.

[0033] This invention employs a rotary frame to achieve continuous processes such as slag dumping, leveling, crushing, and unloading; it achieves extremely high processing speed and eliminates slag leakage. Simultaneously, during the slag dumping, leveling, and crushing processes, waste heat is recovered using cooling water pipes or cooling water jackets in the cooling flaps, which can then be used to generate steam for power generation. Attached Figure Description

[0034] Figure 1 Top view of a ring-type dry treatment and waste heat recovery process device for smelting slag;

[0035] Figure 2 AA view (central cross-section of main drive and rotary joint);

[0036] Figure 3 BB view (cross-sectional view of heat-absorbing dust cover);

[0037] Figure 4 CC view (cross-sectional view of the cantilever flat-laying roller);

[0038] Figure 5 DD view (cross-sectional view of the cantilever crushing roller);

[0039] Figure 6 FF view (cross-sectional view of the crushing roller in the material discharge zone);

[0040] Figure 7 EE view (cross-sectional view of the slag pan tilter); Detailed Implementation

[0041] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0042] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] This utility model relates to a ring-type dry treatment device for smelting slag. For example... Figures 1 to 7 As shown; including:

[0046] The circular slewing frame 2 has several inner ring load-bearing rollers and outer ring load-bearing rollers 5 correspondingly arranged below it;

[0047] A drive unit 1 is used to drive the slewing frame to rotate;

[0048] An inner support curved rail 6 is provided on the outer side of the inner ring load-bearing roller; and an outer support curved rail is provided on the inner side of the outer ring load-bearing roller.

[0049] The inner and outer support curved tracks are set concentrically;

[0050] Several fan-shaped cooling flaps 3 are evenly distributed on the slewing frame;

[0051] Among them, such as Figure 6 As shown, each cooling flap is hinged to the rotary frame on the same radial side; a wheel frame is provided at the bottom of each cooling flap, and track wheels are provided at both ends of the wheel frame corresponding to the inner support curved rail and the outer support curved rail; the inner support curved rail and the outer support curved rail form a concave section at a predetermined position.

[0052] When the cooling flap moves to the concave section under the drive of the slewing frame, the track wheel below the cooling flap moves along the concave section under the action of gravity, causing the cooling flap to flip downward at a predetermined angle along the hinge axis; when the cooling flap leaves the concave section under the drive of the slewing frame, the track wheel below the cooling flap gradually moves along the curved track to the ground section.

[0053] A rotary water supply connector 8 is provided at the center of the slewing frame; a water supply pipe and a return water (gas) pipe are provided between the rotary water supply connector and the slewing frame;

[0054] The stator portion of the rotary water supply connector is used to connect to the water supply pipe; the rotor portion of the rotary water supply connector is connected to the rotary frame corresponding to each cooling flap via the water supply pipe; the water supply pipe of the rotary frame is connected to the inlet of the cooling water pipe or cooling water jacket of each cooling flap via a pipe, for example, it can be connected at the hinge axis between the cooling flap and the rotary frame via a coaxially arranged rotary joint; that is, the water supply pipe of the rotary frame is connected to the inlet of the rotary joint via a pipe; the outlet of the rotary joint is connected to the inlet of the cooling water pipe or cooling water jacket of the cooling flap; the rotary joint can be selected as one inlet and one outlet or two inlets and two outlets as needed. The return water (air) pipe of the rotary frame is connected to the outlet of the cooling water pipe or cooling water jacket of each cooling flap via a pipe.

[0055] A slag pit is provided at the foundation corresponding to the concave section, and a material guiding funnel is provided in the slag pit; a pair of crushing rollers are arranged at intervals below the material guiding funnel; wherein, at least one crushing roller is connected to a reduction motor.

[0056] like Figure 2 and Figure 3 As shown, a cantilever support is provided on the inner or outer side of the slewing frame, and a dust cover 4 is provided below the cantilever support corresponding to the slewing frame. Furthermore, a waste heat recovery pipe is provided inside the dust cover to facilitate the absorption and utilization of the thermal radiation energy on the surface of the high-temperature liquid slag, which is converted into some of the steam and carried away. At the same time, the heat-absorbing dust cover 4 also has a dust-proof function.

[0057] like Figure 4 As shown, a cantilever bracket is provided on one side of the slewing frame; a leveling roller is provided below the cantilever bracket corresponding to the cooling flap.

[0058] like Figure 5 As shown, a cantilever support is provided on one side of the slewing frame; a crushing roller is provided below the cantilever support corresponding to the cooling flap.

[0059] like Figure 7 As shown, a cantilever support is provided on one side of the slewing frame; a slag pan tilter is provided on the cantilever support corresponding to the cooling flap;

[0060] In a preferred embodiment of this utility model, the rotary car frame is divided into a slag dumping area, a uniform spreading area, a slag crushing area and a slag falling area in sequence.

[0061] A cantilever support is provided on one side of the rotary car frame in the slag dumping area; a slag pan tilter is provided on the cantilever support corresponding to the cooling flap;

[0062] One or more cantilever supports are provided on one side of the rotary frame in the evenly spreading area; a leveling roller is provided below the cantilever support corresponding to the cooling flap;

[0063] One or more cantilever supports are provided on one side of the rotary frame in the crushing area; crushing rollers are provided below the cantilever supports corresponding to the cooling flaps;

[0064] Furthermore, guide wheels 7 are provided on the inner and / or outer circumferential surfaces of the slewing frame.

[0065] Work process:

[0066] First, the smelting slag is poured into a slag pan. The slag pan is then lifted by a crane onto the slag pan tilting machine 12 in the slag dumping area. The slag pan tilting machine 12, through electronic control, evenly pours the high-temperature liquid slag onto a ring of cooling flaps 3. The cooling flaps 3 have a load-bearing wheel at the bottom center and move in a ring on the support curved rail 6. The cooling flaps 3 are connected to the rotary frame 2 via a hinge support at the bottom in the forward direction. Driven by the main drive 1 and guided by the center of the guide wheel 6, the rotary frame 2 rotates, which in turn drives the outer ring rotor of the rotary joint center 8 to move, causing the cooling flaps 3 to rotate. The number of cooling flaps 2 in a ring is designed to be fan-shaped and evenly distributed according to process requirements. In this invention, 60 pieces are evenly distributed around a ring, and each cooling flap 2 is connected to the rotary frame 2. The main drive unit 1 is symmetrically arranged on both sides of the slewing frame 2, while the guide wheels 7, corresponding to the number of cooling flaps 2, are arranged inside the slewing frame 2 to ensure that the slewing frame 2 rotates without eccentricity on the load-bearing rollers 5. The entire slewing frame is connected as a single rotating unit. The entire rotation process, starting from the slag pouring starting position, passes through the evenly spreading area, the crushing area, and the slag dropping area at the end position. When the liquid slag is poured onto the cooling flaps 2, the cooling flaps 2 have a serpentine pipe arrangement inside, with water entering and exiting in one direction. This absorbs the residual heat of the liquid slag and exchanges energy to generate steam. The steam and water mixture enters from the center 8 of the rotary joint, and the water and steam are separated at the top of the rotary joint center 8. The cooling water at the bottom is then sent to the cooling flaps 2 by the power pump. The cooling flaps 2 absorb the heat of the liquid slag again to generate steam. This process is repeated, and the high-pressure steam is sent to the generator set for power generation after a series of processes, forming a process of absorbing and reusing the residual heat of the liquid slag.

[0067] When liquid slag is poured onto the cooling flap 3, it flows and accumulates, forming a shape with a high thickness in the middle and a thin edge. As the rotary carriage 2 rotates, the cooling flap 3 with accumulated liquid slag moves to the evenly spreading area. The evenly spreading area is equipped with cantilevered spreading rollers 9. The high-temperature slag with good fluidity is evenly distributed to the outer area of ​​the cooling flap 3 under the pressure of the cantilevered spreading rollers 9. In this way, the thickness of the slag on each cooling flap 3 is basically uniform, the area is maximized, and the heat absorption is also the best. When the rotary carriage 2 moves the evenly spread cooling flap 3 to the slag crushing area, the slag has been cooled for a certain period of time, and the surface gradually hardens, especially the bottom of the slag and the top surface of the cooling flap 3 are in contact and harden faster. However, the inside of the slag is still very hot and is still in a fluid state. At this time, the cantilevered crushing rollers 10 above crush the evenly spread slag by squeezing and rotating, releasing the internal temperature of the slag and absorbing and carrying away as much heat as possible, converting it into steam. The cantilever crushing roller 10 has irregular cones welded to its surface, resembling a mace structure, which punctures and crushes the spread slag through compression. The rotary frame 2 continues to rotate, absorbing heat. When the cooling flap 3 reaches the slag drop area, it gradually changes its tilt angle from a horizontal position under gravity due to the action of the curved track. Reaching a critical point, the cooling flap 3 suddenly slips at a certain angle and flips directly to a vertical position. Under the action of gravity and inertia, the slag on the cooling flap 3 falls directly into the crushing roller 11 below. Under the strong extrusion force of the crushing roller 11, the slag is further crushed and falls off to be transported elsewhere for screening and utilization. Throughout the entire rotary motion, as the slag continues to cool and shrink on the cooling flap 3, there is displacement between the bottom of the slag and the top plate of the cooling flap 3, thus preventing slag adhesion. During the process of absorbing the waste heat from smelting slag, the speed of the entire rotary carriage 2 can be frequency-controlled. Initially, the speed is faster during slag dumping to ensure the hot slag is quickly poured onto the cooling tilting plate 3. After dumping, the slag tray undergoes waste heat conversion and absorption in the rotary cooling ring, at which point the rotation speed slows down. This speed is dynamically adjusted according to the cooling rate and the slag delivery time interval. The entire rotary carriage can also be stopped for waste heat absorption or rotated slowly, allowing for continuous operation. Throughout the waste heat recovery process, the cooling tilting plate 3 is also equipped with a heat-absorbing dust removal hood 4. This hood 4 is also water-cooled, converting some of the thermal radiation energy from the slag surface into steam to be carried away. Simultaneously, the heat-absorbing dust removal hood 4 is connected to a negative pressure duct, which also serves a dust removal function, especially in the slag dumping and slag falling areas, where all generated dust and fumes are drawn away and purified.

[0068] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Many other changes and modifications made without departing from the concept and scope of the present invention should be considered within the protection scope of the present invention.

[0069] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0070] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A ring-type dry treatment and waste heat recovery device for smelting slag, characterized in that, include: The circular slewing frame has several inner and outer load-bearing rollers installed below it. A drive unit for driving the slewing frame to rotate; An inner support curved rail is provided on the outer side of the inner ring load-bearing roller; and an outer support curved rail is provided on the inner side of the outer ring load-bearing roller; The inner and outer support curved tracks are set concentrically; Several fan-shaped cooling flaps are evenly distributed on the slewing frame; cooling water pipes or cooling water jackets are installed inside the cooling flaps; the cooling water pipes or cooling water jackets are provided with inlets and outlets. Each cooling flap is hinged to the same side of the slewing frame in the radial direction; each cooling flap has a wheel frame at the bottom facing downwards, and the two ends of the wheel frame are equipped with track wheels corresponding to the inner support curved rail and the outer support curved rail. The inner and outer support curved rails form a concave section at a predetermined position; When the cooling flap moves to the concave section under the drive of the slewing frame, the track wheel below the cooling flap moves along the concave section under the action of gravity, causing the cooling flap to flip downward at a predetermined angle along the hinge axis; when the cooling flap leaves the concave section under the drive of the slewing frame, the track wheel below the cooling flap gradually moves along the curved track to the ground section. A rotary water supply connector is provided at the center of the rotary frame; a water supply pipe and a water return pipe are provided between the rotary water supply connector and the rotary frame; The stator portion of the rotary water supply connector is used to connect to the water supply pipe; the rotor portion of the rotary water supply connector is connected to the rotary frame corresponding to each cooling flap via the water supply pipe; the water supply pipe of the rotary frame is connected to the inlet of the cooling water pipe or cooling water jacket of each cooling flap via a pipe; the return water pipe of the rotary frame is connected to the outlet of the cooling water pipe or cooling water jacket of each cooling flap via a pipe.

2. The annular smelting slag dry treatment and waste heat recovery device as described in claim 1, characterized in that, A cantilever bracket is provided on the inner or outer side of the slewing frame, and a dust cover is provided below the cantilever bracket corresponding to the slewing frame.

3. The annular smelting slag dry treatment and waste heat recovery device as described in claim 1, characterized in that, A cantilever support is provided on one side of the slewing frame; a leveling roller is provided below the cantilever support corresponding to the cooling flap.

4. The annular smelting slag dry treatment and waste heat recovery device as described in claim 1, characterized in that, A cantilever support is provided on one side of the slewing frame; a crushing roller is provided below the cantilever support corresponding to the cooling flap.

5. The annular smelting slag dry treatment and waste heat recovery device as described in claim 1, characterized in that, A cantilever support is provided on one side of the slewing frame; a slag pan tilter is provided on the cantilever support corresponding to the cooling flap.

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