Recrushing mechanism, crushing device and control method for household garbage incineration slag

Abstract

The invention provides a re-crushing mechanism for household garbage incineration slag, a crushing device of the re-crushing mechanism and a control method. And the re-crushing mechanism comprises a hourglass-shaped crushing movable body and a crushing fixed body, and the hourglass-shaped crushing movable body and the crushing fixed body enclose to form an annular crushing cavity used for crushing the household garbage incineration slag. The crushing moving body is driven by the rotating shaft to rotate, and dynamic swing is achieved through the multiple first electromagnets and the multiple second electromagnets. The electromagnet not only drives the crushing moving body to swing flexibly to realize multi-directional extrusion and shearing crushing, but also delays the falling of iron-containing residues through magnetic field adsorption, increases the crushing times, and separates the iron-containing residues from non-magnetic residues at the same time. And the material receiving rotary table performs synchronous partition collection according to the falling time difference of the magnetic residues and the non-magnetic residues, and crushing and preliminary separation are completed. The device integrates the crushing function and the separating function, the crushing efficiency and the resource utilization rate are remarkably improved, and the device is particularly suitable for efficient treatment and resource utilization of the household garbage incineration slag.

Description

Technical Field

[0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and specifically relates to a re-crushing mechanism, a crushing device and a control method for domestic waste incineration slag. Background Art

[0002] With the acceleration of urbanization, the amount of domestic waste is increasing, and the harmlessness, reduction and resource treatment of waste have become the focus of social attention. Domestic waste incineration technology is one of the mainstream waste treatment methods at present, and its advantage is that the reduction effect is significant. However, the incineration process will produce a large amount of slag, which contains metals (such as iron blocks), glass, minerals and incompletely burned organic matter. These slags are not only highly heterogeneous and complex in composition, but also have large differences in particle size and high hardness. Therefore, how to efficiently crush and separate the different components in the incineration slag has become a technical problem for resource utilization.

[0003] 1. Current status of traditional crushing technology The existing domestic waste incineration slag crushing treatment usually adopts the following two types of equipment: Cone crusher: The material is crushed by the eccentric swing and extrusion force between the moving cone and the fixed cone.

[0004] Disadvantages: During the eccentric swing, other channels in the crushing chamber will become larger, which may cause large pieces of residue to pass directly and fail to be fully crushed. It has poor adaptability to special-shaped materials (such as sharp metal or glass), which may cause the equipment to jam or become blocked. It lacks dynamic adjustment function and cannot adjust the crushing strength and gap for complex materials.

[0005] Hammer crusher: The material is crushed by the high-speed rotating hammer.

[0006] Disadvantages: Limited crushing effect on hard materials (such as metal and glass), easy to cause rapid wear of the hammer head. Not suitable for processing mixed materials with complex ingredients, low crushing efficiency.

[0007] In addition, these traditional crushing equipment are usually unable to achieve the material separation function, and additional magnetic separation equipment is required for subsequent processing, which not only increases the complexity of the process, but also increases equipment costs and energy consumption.

[0008] 2. Current status and shortcomings of separation of iron-containing residues The separation of iron-containing residues from incinerator slag is usually completed by magnetic separation equipment. However, the traditional magnetic separation method has the following problems: the magnetic residue still contains large particles after crushing, which affects the separation efficiency; the separation cannot be completed directly during the crushing process, and additional processes and equipment are required, which reduces the processing efficiency.

[0009] 3. Technical requirements Based on the above problems, the current technology urgently needs a device that can efficiently crush the highly heterogeneous and hard domestic waste incineration slag and simultaneously separate the magnetic residue from the non-magnetic residue, so as to: Prevent large pieces of debris from sliding off and passing through unbroken; Improve crushing uniformity and adapt to multi-component complex materials; Simplify the crushing and separation processes and reduce equipment operating costs. Summary of the invention

[0010] Therefore, the purpose of the present invention is to provide a re-crushing mechanism and a crushing device for domestic waste incineration slag, which integrates crushing and separation functions, significantly improves crushing efficiency and resource utilization, and is particularly suitable for efficient treatment and resource utilization of domestic waste incineration slag.

[0011] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A re-crushing mechanism for slag from incineration of domestic waste, comprising a rectangular hourglass-shaped crushing body and a crushing stator with an hourglass-shaped inner arc surface which is sleeved outside the crushing body at intervals; the crushing body and the crushing stator enclose an annular crushing chamber; a feed hopper is arranged above the crushing chamber, and a material receiving turntable is arranged below the crushing chamber; a rotating shaft is vertically passed through the center of the crushing body; the rotating shaft is connected to the inner wall of the crushing body through a plurality of first elastic telescopic sleeves to drive the crushing body to rotate; a plurality of first electromagnets are evenly embedded in the upper and lower parts of the crushing body along the horizontal annular surface of the crushing body; a second electromagnet is embedded in the crushing stator corresponding to the first electromagnet of the crushing body, and a controller controls the rotation speed of the rotating shaft, and respectively controls the power on and off and the current direction of each first electromagnet and each second electromagnet, thereby controlling the rotation and swing of the crushing body.

[0012] The middle parts of the crushing moving body and the crushing fixed body are made of the first wear-resistant and impact-resistant magnetic isolation material, which isolates the upper and lower parts of the crushing moving body and the crushing fixed body.

[0013] Among them, the upper and lower parts of the crushing dynamic body and the crushing fixed body are distributed with second wear-resistant and impact-resistant magnetic isolation materials along their horizontal annular surface spacing, the part between two adjacent second wear-resistant and impact-resistant magnetic isolation materials is magnetic metal, and the first electromagnet and the second electromagnet are arranged behind the magnetic metal.

[0014] Among them, the first wear-resistant and impact-resistant magnetic insulation material and the second wear-resistant and impact-resistant magnetic insulation material are silicon nitride ceramics, austenitic stainless steel, tin bronze or tungsten carbide-cobalt alloy; the magnetic conductive metal is silicon steel, cast iron, high manganese steel or a composite structure of the three.

[0015] Wherein, the two ends of the first elastic telescopic sleeve are respectively hinged with the rotating shaft and the inner wall of the crushing movable body; the multiple first elastic telescopic sleeves are divided into two groups, which are respectively arranged at the upper part and the lower part of the crushing movable body; the multiple first elastic telescopic sleeves in each group are evenly arranged around the rotating shaft.

[0016] Wherein, a first bearing disk is supported below the crushing dynamic body; the first bearing disk is connected to the base through a plurality of second elastic telescopic sleeve rods; and the two ends of the second elastic telescopic sleeve rods are respectively hinged to the first bearing disk and the base.

[0017] Among them, a first motor is connected to and drives the rotating shaft to rotate; a second motor drives the material receiving turntable to rotate through gears, and a second bearing plate is arranged under the material receiving turntable and supports its horizontal rotation; the material receiving turntable is divided into multiple independent material receiving compartments around its center.

[0018] A control method for a re-crushing mechanism of domestic waste incineration slag comprises the following steps: (1) Feeding and crushing preparation: Feeding: introducing the slag from the incineration of domestic waste into the annular crushing chamber formed by the hourglass-shaped crushing moving body and the hourglass-shaped crushing fixed body through the feeding hopper, wherein the slag includes magnetic residue and non-magnetic residue; Initialization of the crushing chamber: Multiple first and second electromagnets are evenly arranged on the horizontal annular surfaces of the crushing moving body and the crushing fixed body, and each group of electromagnets can independently control its power-on and power-off states and current direction; (2) Shaft drive and initial rotation: Shaft rotation control: The shaft is driven by the first motor to rotate, and its initial speed is Set by the controller to meet the basic crushing rate requirements: ; in, The initial rotation speed of the shaft (in revolutions per second) is used to ensure uniform crushing of the material; : Quantitative signal of material distribution uniformity in the crushing chamber; : Feeding time per unit time (in seconds), monitored by the feed controller; Flexible adjustment of the first elastic telescopic sleeve: The rotating shaft is connected to the inner wall of the crushing body through a plurality of first elastic telescopic sleeve rods, so as to maintain a stable gap in the crushing chamber during the rotation process and allow the crushing body to swing in multiple directions.

[0019] (3) 360° swing control of the first electromagnet and the second electromagnet: Grouping arrangement of electromagnets: The first electromagnet and the second electromagnet are evenly arranged into several groups along the horizontal ring surface, numbered as (1 ); Swing direction control: The controller independently controls each group of the first and second electromagnets to change their energizing directions, thus achieving multi-directional swinging of the crushing body: ;in, :No. The switching cycle of the electromagnet group (unit: seconds) determines the frequency of the crushing body's swing; : The swing frequency of the crushing body (unit: Hz) is adjusted in real time by the controller to ensure uniform force in the crushing chamber; Swing angle optimization: ; in, No. The swing angle corresponding to the group direction (unit: degree) determines the swing amplitude of the crushing body; : Basic swing angle (unit: degree), used to ensure the basic squeezing effect in the crushing chamber; : Swing angle adjustment coefficient (unit: degree / density), used to respond to changes in material density; Crushing chamber Material density in the direction (unit: kg / m3); 360° continuous swing: The controller switches the electromagnets group by group in a clockwise or counterclockwise sequence to ensure that the crushing body can achieve 360° continuous swing in the horizontal direction, covering the entire annular crushing chamber; (4) Delayed drop of magnetic residue Magnetic field adsorption and falling delay: ;in, : The falling delay time of magnetic residue (unit: seconds), which is determined by magnetic field adsorption and switching; The switching cycle of the electromagnet (in seconds) determines the initial adsorption time of the magnetic residue; Delay time adjustment coefficient (unit: seconds / kg); : The total amount of magnetic residue in the current crushing chamber (unit: kg), monitored by the sensor; Demagnetization release: When the magnetic field is switched to the disconnected state, the magnetic residue falls onto the receiving turntable; (5) Partition adjustment of the material receiving turntable Turntable rotation speed control: ;in, : The rotation speed of the receiving turntable (unit: degrees / second) is used to ensure accurate partitioning; : The partition angle interval of the receiving tank (unit: degree), which determines the coverage of different receiving tanks; The time interval between the magnetic residue and the non-magnetic residue falling (in seconds); Synchronize partitions: According to the delay time of magnetic residue and the rapid falling time of non-magnetic residue, the controller dynamically adjusts the angle of the turntable to make the magnetic residue and non-magnetic residue fall into different receiving chambers respectively; (6) Crushing and separation completed The magnetic residue is crushed repeatedly and then the particle size is refined and falls into the designated receiving bin; The non-magnetic residue falls quickly into other receiving bins for subsequent processing.

[0020] A crushing device adopting the re-crushing mechanism.

[0021] The present invention provides a re-crushing mechanism and a crushing device suitable for domestic waste incineration slag, which overcomes many shortcomings of traditional cone crushers through hourglass-shaped structure, electromagnet dynamic swing control and integrated crushing and separation design, and achieves more efficient and more accurate material processing. Its beneficial effects are specifically embodied as follows: 1. Innovative structural design to solve the problem of large pieces of residue being left behind Hourglass-shaped crushing chamber design: The annular crushing chamber formed by the crushing moving body and the crushing fixed body adopts an hourglass-shaped middle contraction design, forcing the material to be concentrated in the contraction area for crushing. Compared with the traditional cone crusher, which has the problem of eccentric swing causing the channels in other positions to become larger and large pieces of residue to slide easily, the hourglass-shaped crushing chamber effectively avoids the slippage and loss of materials and improves the crushing effect.

[0022] Annular crushing chamber without dead angle: The crushing force of traditional cone crushers is concentrated at the contact point between the moving cone and the fixed cone, and there is an obvious crushing dead angle. The present invention uses a 360° dynamically swinging hourglass-shaped crushing moving body to evenly distribute the materials in the annular crushing chamber, eliminating the crushing dead angle and ensuring that all materials can be fully crushed.

[0023] 2. Dynamic crushing control to improve crushing efficiency and adaptability Dynamically controlled swing of electromagnet: The present invention realizes dynamic swing of the crushing body by controlling the power on and off of the first and second electromagnets and the direction of the current. The swing direction and amplitude can be adjusted in real time according to the density, hardness and shape of the material in the crushing chamber. Compared with the fixed eccentric swing design of the traditional cone crusher, the dynamic swing mode increases the action points of the crushing body and improves the crushing efficiency of complex and special-shaped materials. It is particularly suitable for processing mixed materials with multiple components in the slag of domestic waste incineration.

[0024] 3. Integration of magnetic separation and enhanced crushing Delayed falling of magnetic residue: The present invention utilizes the magnetic field adsorption characteristics of the electromagnet to delay the falling of magnetic residue (such as iron blocks) in the crushing chamber, so that it stays in the crushing chamber for a longer time. This multiple crushing and strengthening method improves the crushing rate of magnetic residue, especially for the refinement of hard materials such as iron blocks.

[0025] Crushing and separation are carried out simultaneously: the magnetic residue is delayed by electromagnetic adsorption, while the non-magnetic residue falls quickly. Combined with the dynamic partition design of the receiving turntable, the preliminary separation of magnetic and non-magnetic residues is achieved. Compared with the design of traditional cone crushers that require additional magnetic separation equipment, the present invention directly completes the separation during the crushing process, simplifying the equipment configuration and process flow.

[0026] The present invention not only solves the structural deficiencies of traditional equipment, but also achieves a comprehensive breakthrough in adaptability, versatility and efficiency, and has significant practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is a vertical cross-sectional schematic diagram of the crushing mechanism of the present invention in a normal state; Figure 2 It is a vertical cross-sectional schematic diagram of the crushing mechanism of the present invention when it is working; Figure 3 It is a schematic structural diagram of the crushing dynamic body of the present invention.

[0028] In the figure, 1, crushing moving body; 2, crushing fixed body; 3, annular crushing chamber; 4, feed hopper; 5, material receiving turntable; 51, independent material receiving cabin; 6, rotating shaft; 61, first elastic telescopic sleeve; 7, first electromagnet; 8, second electromagnet; 9, first wear-resistant and impact-resistant magnetic isolation material; 10, second wear-resistant and impact-resistant magnetic isolation material; 11, magnetic conductive metal; 12, first bearing disk; 13, second elastic telescopic sleeve; 14, base; 15, first motor; 16, second bearing disk; 17, second motor. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figures 1 to 3 A re-crushing mechanism and a crushing device for slag from a domestic waste incineration furnace, comprising a rectangular hourglass-shaped crushing body 1 and a crushing fixed body 2 with an hourglass-shaped inner arc surface which is sleeved outside the crushing body 1 at intervals; the crushing body 1 and the crushing fixed body 2 enclose an annular crushing chamber 3; a feed hopper 4 is arranged above the crushing chamber 3, and a material receiving turntable 5 is arranged below; a rotating shaft 6 is vertically penetrated through the center of the crushing body 1; the rotating shaft 6 is connected to the inner wall of the crushing body 1 through a plurality of first elastic telescopic sleeve rods 61 to drive the crushing body 1 to rotate; a plurality of first electromagnets 7 are evenly embedded in the upper and lower parts of the crushing body 1 along the horizontal annular surface of the crushing body 1; a second electromagnet 8 is correspondingly embedded in the crushing fixed body 2 corresponding to the first electromagnet 7 of the crushing body 1, and a controller controls the rotation speed of the rotating shaft 6, and respectively controls the power on and off and the current direction of each first electromagnet 7 and each second electromagnet 8, thereby controlling the rotation and swing of the crushing body 1.

[0033] Shaft speed: The speed range is 50rpm to 300rpm, which is automatically adjusted according to the material quantity and load.

[0034] Electromagnet working current: The working current range of each set of electromagnets is 2A to 10A, and the electromagnetic field strength range is 0.5T to 1.5T, which is dynamically adjusted to achieve the best crushing and separation effect.

[0035] The speed of the receiving turntable is in the range of 10rpm to 100rpm, which is adjusted synchronously with the falling time of the magnetic residue and the non-magnetic residue.

[0036] Controller: The controller integrates a PLC system, which collects material load, magnetic residue content and particle size data in real time through sensors, and dynamically adjusts the parameters of the rotating shaft, electromagnet and material receiving turntable.

[0037] Furthermore, the middle parts of the crushing moving body 1 and the crushing fixed body 2 are made of the first wear-resistant and impact-resistant magnetic isolation material 9, which isolates the upper and lower parts of the crushing moving body 1 and the crushing fixed body 2.

[0038] Furthermore, the upper and lower parts of the crushing dynamic body 1 and the crushing fixed body 2 are distributed with second wear-resistant and impact-resistant magnetic isolation materials 10 along their horizontal annular surface spacing, the part between two adjacent second wear-resistant and impact-resistant magnetic isolation materials 10 is magnetic conductive metal 11, and the first electromagnet 7 and the second electromagnet 8 are arranged behind the magnetic conductive metal 11.

[0039] Furthermore, the first wear-resistant and impact-resistant magnetic insulation material 9 and the second wear-resistant and impact-resistant magnetic insulation material 10 are silicon nitride ceramics, austenitic stainless steel, tin bronze or tungsten carbide-cobalt alloy; the magnetic conductive metal is silicon steel, cast iron, high manganese steel or a composite structure of the three.

[0040] Furthermore, both ends of the first elastic telescopic sleeve rod 61 are hinged to the rotating shaft 6 and the inner wall of the crushing movable body 1 respectively; multiple first elastic telescopic sleeve rods 61 are divided into two groups, respectively arranged at the upper and lower parts of the crushing movable body 1; multiple first elastic telescopic sleeve rods 61 in each group are evenly arranged around the rotating shaft 6.

[0041] Furthermore, a first bearing plate 12 is supported below the crushing body 1; the first bearing plate 12 is connected to the base 14 through a plurality of second elastic telescopic sleeves 13; and both ends of the second elastic telescopic sleeves 13 are hinged to the first bearing plate 12 and the base 14 respectively.

[0042] Furthermore, the rotating shaft 6 is driven to rotate by a first motor 15 .

[0043] Furthermore, the material receiving turntable 5 is divided into a plurality of independent material receiving chambers 51 around its center; a second bearing plate 16 is supported below the material receiving turntable 5; and the material receiving turntable 5 is driven to rotate by a second motor 17.

[0044] A method for re-crushing and separating slag from a domestic waste incineration furnace is achieved by linking the following steps: S1. Feeding: The slag from the incineration of domestic waste is introduced into the annular crushing chamber 3 formed by the hourglass-shaped crushing moving body 1 and the hourglass-shaped crushing fixed body 2 through the feed hopper 4, and the slag includes magnetic residue and non-magnetic residue; S2. Rotation and swing of the crushing body: The crushing body 1 is driven to rotate by the rotating shaft 6 through the first motor 15. At the same time, the first electromagnet 7 embedded in the crushing body 1 and the second electromagnet 8 on the crushing stator 2 are controlled to switch on and off the power and the direction of the current of the first electromagnet 7 and the second electromagnet 8, so that the crushing body 1 swings while rotating, and cooperates with the crushing stator 2 to crush the slag in the annular crushing chamber 3; Among them, the magnetic residue is delayed to fall: when the first electromagnet 7 and the second electromagnet 8 are energized, a magnetic field is generated to attract the magnetic residue in the annular crushing chamber 3, delaying its falling time, and when the magnetic field is disconnected, the magnetic residue is allowed to fall; Non-magnetic residue falls quickly: Non-magnetic residue is not attracted by the magnetic field and falls directly to the bottom of the crushing chamber by gravity; S3. Separation and collection: The material receiving turntable 5 is driven by the second motor 17 to rotate synchronously, and the material receiving turntable 5 is divided into a plurality of independent receiving chambers 51. According to the time difference between the delayed falling of the magnetic residue and the rapid falling of the non-magnetic residue, the magnetic residue and the non-magnetic residue are collected into different receiving chambers 51; S4. Optimization of crushing times: The magnetic residue is squeezed and sheared by the crushing moving body 1 and the crushing fixed body 2 for multiple times due to delayed falling in the crushing chamber, thereby further refining the residue and facilitating subsequent screening and separation; S5. Dynamic adjustment: Through the control of the first electromagnet 7 and the second electromagnet 8 and the adjustment of the rotation speed of the rotating shaft 6, the gap between the crushing dynamic body 1 and the crushing fixed body 2 is dynamically adjusted to meet the crushing requirements of slag with different particle sizes and hardness.

[0045] More specifically, (1) Feeding and crushing preparation Feeding: The domestic waste incineration slag is introduced into the annular crushing chamber 3 formed by the hourglass-shaped crushing moving body 1 and the hourglass-shaped crushing fixed body 2 through the feeding hopper 4, and the slag includes magnetic residue and non-magnetic residue.

[0046] Initialization of the crushing chamber: A plurality of first electromagnets 7 and second electromagnets 8 are evenly arranged on the horizontal annular surfaces of the crushing moving body 1 and the crushing fixed body 2, and each group of electromagnets can independently control its on / off state and current direction.

[0047] (2) Shaft drive and initial rotation 1. Shaft rotation control: The rotating shaft 6 is driven to rotate by the first motor 15, and its initial speed is Set by the controller to meet the basic crushing rate requirements: ; in, The initial rotation speed of the shaft (in revolutions per second) is used to ensure uniform crushing of the material; : Quantitative signal of material distribution uniformity in the crushing chamber (unit: dimensionless, value 0-1); : Feeding time per unit time (unit: seconds), monitored by the feed controller.

[0048] 2. Flexibility adjustment of the first elastic telescopic sleeve rod 61: The rotating shaft is connected to the inner wall of the crushing body 1 through a plurality of first elastic telescopic sleeve rods 61, so as to maintain a stable gap in the crushing chamber during the rotation process and allow the crushing body to swing in multiple directions.

[0049] (3) 360° swing control of the first and second electromagnets 1. Grouping arrangement of electromagnets: The first electromagnet 7 and the second electromagnet 8 are evenly arranged into several groups along the horizontal annular surface and are numbered as (1 , is the total number of electromagnet groups on the ring surface).

[0050] 2. Swing direction control: The controller independently controls each group of the first electromagnet and the second electromagnet to change their energizing direction, thereby achieving multi-directional swinging of the crushing body 1: ;in, :No. The switching cycle of the electromagnet group (unit: seconds) determines the frequency of the crushing body's swing; : The swing frequency of the crushing body (unit: Hz) is adjusted in real time by the controller to ensure uniform force in the crushing chamber.

[0051] 3. Swing angle optimization: ; in, No. The swing angle corresponding to the group direction (unit: degree) determines the swing amplitude of the crushing body; : Basic swing angle (unit: degree), used to ensure the basic squeezing effect in the crushing chamber; : Swing angle adjustment coefficient (unit: degree / density), used to respond to changes in material density; Crushing chamber Material density in the direction (unit: kg / cubic meter).

[0052] 4.360° continuous swing: The controller switches the electromagnets group by group in a clockwise or counterclockwise sequence to ensure that the crushing body can achieve 360° continuous swing in the horizontal direction, covering the entire annular crushing chamber.

[0053] (4) Delayed drop of magnetic residue 1. Magnetic field adsorption and falling delay: ;in, : The falling delay time of magnetic residue (unit: seconds), which is determined by magnetic field adsorption and switching; The switching cycle of the electromagnet (in seconds) determines the initial adsorption time of the magnetic residue; Delay time adjustment coefficient (unit: seconds / kg); : The total amount of magnetic residue in the current crushing chamber (unit: kilograms) is monitored by the sensor.

[0054] 2. Demagnetization release: When the magnetic field is switched to the off state, the magnetic residue falls onto the receiving turntable 5.

[0055] (5) Partition adjustment of the material receiving turntable 1. Turntable rotation speed control: ;in, : The rotation speed of the receiving turntable (unit: degrees / second) is used to ensure accurate partitioning; : The partition angle interval of the receiving tank (unit: degree), which determines the coverage of different receiving tanks; The time interval between the falling of magnetic residue and non-magnetic residue (unit: seconds).

[0056] 2. Synchronize partitions: According to the delay time of the magnetic residue and the rapid falling time of the non-magnetic residue, the controller dynamically adjusts the angle of the turntable to make the magnetic residue and the non-magnetic residue fall into different receiving chambers 51 respectively.

[0057] (6) Crushing and separation completed The magnetic residue is crushed repeatedly and then the particle size is refined and falls into the designated receiving bin; The non-magnetic residue falls quickly into other receiving bins for subsequent processing.

[0058] The following is a test summary of the present invention: 1. Test parameters Crushing body speed (rpm): 100-250, adjustable, represents the rotation speed of the crushing body.

[0059] Swing frequency (Hz): 1.0-1.8, dynamic swing frequency driven by electromagnet.

[0060] Magnetic field strength (T): 1.0-1.8, the magnetic field strength generated by the electromagnet.

[0061] Material receiving turntable speed (rpm): 50-80, dynamically adjusted according to material separation requirements.

[0062] 2. Residue composition: Metal content: mainly magnetic residues such as iron blocks and iron filings.

[0063] Glass content: non-magnetic material with large particle size distribution.

[0064] Mineral content: including high temperature resistant substances with high hardness.

[0065] Unburned organic matter: Small amounts of organic residues that have not been completely burned.

[0066] Specifically, the source of materials: uniform sampling of incineration slag, the content of batch materials is within the following range: Metal content: 20%-30%, particle size about 10-50mm.

[0067] Glass content: 30%-40%, particle size about 5-30mm.

[0068] Mineral content: 25%-35%, high hardness, particle size about 10-40mm.

[0069] Unburned organic matter: 5%-15%, mainly carbonaceous matter.

[0070] 3. Test environment: room temperature: 20℃±5℃.

[0071] 4. Equipment status: Clean and zero-point calibrate before each set of tests to ensure consistency.

[0072] 5. Test objectives: Optimize the crushing effect and increase the rate of material particle size reaching the standard.

[0073] Improve the separation purity of magnetic residue and the separation efficiency of non-magnetic residue.

[0074] Reduce the rate of unbroken residues and optimize resource utilization.

[0075] 6. The results are summarized in the following table:

[0076] 7. Test result analysis: The comprehensive crushing effect is significantly improved: The dynamic swing of the invention is combined with the hourglass-shaped crushing chamber, and the crushing force is more evenly distributed, especially the particle size control of hard minerals and glass is better. Through dynamic gap adjustment, the problem of large pieces of material sliding is reduced, and a higher crushing efficiency is achieved.

[0077] The separation purity of magnetic residue is much higher than that of traditional equipment: the adsorption delay and multiple crushing functions of the electromagnet improve the refinement and purity of the magnetic residue, avoiding the loss of magnetic materials caused by excessive particle size in traditional equipment.

[0078] High separation efficiency and simpler process: The dynamic partition design of the receiving turntable simultaneously completes the separation of magnetic and non-magnetic residues, reduces the use of additional separation equipment, and significantly reduces equipment complexity and energy consumption.

[0079] The present invention is suitable for processing multi-component complex materials, especially for the efficient crushing and resource utilization of domestic waste incineration slag. It is recommended to be promoted in the resource utilization process, and combined with the magnetic and non-magnetic residue partition collection function, the resource recovery rate can be further improved.

[0080] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A re-crushing mechanism for domestic waste incineration slag, characterized in that: The invention comprises a rectangular hourglass-shaped crushing body (1) and a crushing fixed body (2) having an hourglass-shaped inner arc surface and sleeved outside the crushing body (1) at intervals; the crushing body (1) and the crushing fixed body (2) enclose an annular crushing chamber (3); a feed hopper (4) is arranged above the crushing chamber (3), and a material receiving turntable (5) is arranged below the crushing chamber (3); a rotating shaft (6) is vertically penetrated through the center of the crushing body (1); the rotating shaft (6) is connected to the inner wall of the crushing body (1) through a plurality of first elastic telescopic sleeve rods (61) so as to The crushing moving body (1) is driven to rotate; a plurality of first electromagnets (7) are evenly embedded in the upper and lower parts of the crushing moving body (1) along the horizontal annular surface of the crushing moving body (1); second electromagnets (8) are embedded in the crushing fixed body (2) corresponding to the first electromagnets (7) of the crushing moving body (1); a controller controls the rotation speed of the rotating shaft (6), and controls the power on and off and the current direction of each first electromagnet (7) and each second electromagnet (8), thereby controlling the rotation and swing of the crushing moving body (1).

2. The re-crushing mechanism for domestic waste incineration slag according to claim 1, characterized in that: The middle parts of the crushing moving body (1) and the crushing fixed body (2) are made of a first wear-resistant and impact-resistant magnetic isolation material (9) to isolate the upper and lower parts of the crushing moving body (1) and the crushing fixed body (2).

3. The re-crushing mechanism for domestic waste incineration slag according to claim 2, characterized in that: The upper and lower parts of the crushing moving body (1) and the crushing fixed body (2) are provided with second wear-resistant and impact-resistant magnetic isolation materials (10) spaced along their horizontal annular surfaces, the portion between two adjacent second wear-resistant and impact-resistant magnetic isolation materials (10) is a magnetic conductive metal (11), and the first electromagnet (7) and the second electromagnet (8) are arranged behind the magnetic conductive metal (11).

4. The re-crushing mechanism for domestic waste incineration slag according to claim 3, characterized in that: The first wear-resistant and impact-resistant magnetic isolation material (9) and the second wear-resistant and impact-resistant magnetic isolation material (10) are silicon nitride ceramics, austenitic stainless steel, tin bronze or tungsten carbide-cobalt alloy; the magnetic conductive metal is silicon steel, cast iron, high manganese steel or a composite structure of the three.

5. The re-crushing mechanism for domestic waste incineration slag according to claim 1, characterized in that: The two ends of the first elastic telescopic sleeve rod (61) are respectively hinged to the rotating shaft (6) and the inner wall of the crushing movable body (1); the plurality of first elastic telescopic sleeve rods (61) are divided into two groups, which are respectively arranged at the upper part and the lower part of the crushing movable body (1); the plurality of first elastic telescopic sleeve rods (61) in each group are respectively evenly arranged around the rotating shaft (6).

6. The re-crushing mechanism for domestic waste incineration slag according to claim 1, characterized in that: A first bearing disc (12) is supported below the crushing dynamic body (1); the first bearing disc (12) is connected to a base (14) via a plurality of second elastic telescopic sleeve rods (13); and two ends of the second elastic telescopic sleeve rods (13) are respectively hinged to the first bearing disc (12) and the base (14).

7. The re-crushing mechanism for domestic waste incineration slag according to claim 1, characterized in that: The rotating shaft (6) is driven to rotate by a first motor (15).

8. The re-crushing mechanism for domestic waste incineration slag according to claim 1, characterized in that: The material receiving turntable (5) is divided into a plurality of independent material receiving chambers (51) around its center. A second bearing plate (16) is supported below the material receiving turntable (5). The material receiving turntable (5) is driven to rotate by a second motor (17).

9. A crushing device for slag from domestic waste incineration, characterized in that: A re-crushing mechanism for domestic waste incineration slag comprising the mechanism as claimed in any one of claims 1 to 8.

10. A control method for a re-crushing mechanism of domestic waste incineration slag, characterized in that: The following steps are involved: (1) Feeding and crushing preparation: Feeding: introducing the domestic waste incineration slag into the annular crushing chamber (3) formed by the hourglass-shaped crushing moving body (1) and the hourglass-shaped crushing fixed body (2) through the feeding hopper (4), wherein the slag includes magnetic residue and non-magnetic residue; Initialization of the crushing chamber: a plurality of first electromagnets (7) and second electromagnets (8) are evenly arranged on the horizontal annular surfaces of the crushing moving body (1) and the crushing fixed body (2), and each group of electromagnets can independently control its on / off state and current direction; (2) Shaft drive and initial rotation: Shaft rotation control: The rotating shaft (6) is driven to rotate by the first motor (15), and its initial speed is Set by the controller to meet the basic crushing rate requirements: ； in, The initial rotation speed of the shaft (in revolutions per second) is used to ensure uniform crushing of the material; : Quantitative signal of material distribution uniformity in the crushing chamber; : Feeding time per unit time (in seconds), monitored by the feed controller; Flexibility adjustment of the first elastic telescopic sleeve rod (61): The rotating shaft is connected to the inner wall of the crushing body (1) via a plurality of first elastic telescopic sleeve rods (61), so as to maintain a stable gap in the crushing chamber during rotation and allow the crushing body to swing in multiple directions; (3) 360° swing control of the first electromagnet and the second electromagnet: Grouping arrangement of electromagnets: The first electromagnet (7) and the second electromagnet (8) are evenly arranged in a plurality of groups along the horizontal annular surface and are numbered ( ); Swing direction control: The controller independently controls each group of the first electromagnet and the second electromagnet to change the direction of their power supply, thereby achieving multi-directional swinging of the crushing body (1): ;in, :No. The switching cycle of the electromagnet group (unit: seconds) determines the frequency of the crushing body's swing; : The swing frequency of the crushing body (unit: Hz) is adjusted in real time by the controller to ensure uniform force in the crushing chamber; Swing angle optimization: ; in, No. The swing angle corresponding to the group direction (unit: degree) determines the swing amplitude of the crushing body; : Basic swing angle (unit: degree), used to ensure the basic squeezing effect in the crushing chamber; : Swing angle adjustment coefficient (unit: degree / density), used to respond to changes in material density; Crushing chamber Material density in the direction (unit: kg / m3); 360° continuous swing: The controller switches the electromagnets group by group in a clockwise or counterclockwise order to ensure that the crushing body can achieve 360° continuous swing in the horizontal direction, covering the entire annular crushing chamber; (4) Delayed drop of magnetic residue Magnetic field adsorption and falling delay: ;in, : The falling delay time of magnetic residue (unit: seconds), which is determined by magnetic field adsorption and switching; The switching cycle of the electromagnet (in seconds) determines the initial adsorption time of the magnetic residue; Delay time adjustment coefficient (unit: seconds / kg); : The total amount of magnetic residue in the current crushing chamber (unit: kg), monitored by the sensor; Demagnetization release: When the magnetic field is switched to the off state, the magnetic residue falls onto the receiving turntable (5); (5) Partition adjustment of the material receiving turntable Turntable rotation speed control: ;in, : The rotation speed of the receiving turntable (unit: degrees / second) is used to ensure accurate partitioning; : The partition angle interval of the receiving tank (unit: degree), which determines the coverage of different receiving tanks; The time interval between the magnetic residue and the non-magnetic residue falling (in seconds); Synchronize partitions: According to the delay time of the magnetic residue and the rapid falling time of the non-magnetic residue, the controller dynamically adjusts the angle of the turntable so that the magnetic residue and the non-magnetic residue fall into different receiving chambers (51) respectively; (6) Crushing and separation completed The magnetic residue is crushed repeatedly and then the particle size is refined and falls into the designated receiving bin; The non-magnetic residue falls quickly into other receiving bins for subsequent processing.

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