A sintered wet fuel sorting device

Abstract

This invention discloses a sintering wet fuel sorting device, relating to the field of sorting technology. It includes a feeding mechanism, a material sorting mechanism, and an air supply mechanism. The material sorting mechanism has a material inlet, a dust outlet, and a discharge outlet. The sintering wet fuel sorting device of this invention, through the material sorting mechanism including a base frame, a vibrating conveyor, a vibration drive mechanism, a multi-stage sorting unit, an air hood, and a material dispersing unit, allows sintering wet fuel to enter the multi-stage sorting unit from the material inlet. The vibration drive mechanism drives the vibrating conveyor to vibrate synchronously with the multi-stage sorting unit. Fluidization sorting is achieved by air supply from the bottom of the multi-stage sorting unit via the air supply mechanism. The material dispersing unit drives the head of the multi-stage sorting unit to vibrate, thereby dispersing the water-containing agglomerates at the head. This solves the technical problem of poor sorting efficiency for sintering wet fuel in existing fuel sorting devices.

Description

Technical Field

[0001] This invention relates to the field of raw material preparation technology in the iron and steel metallurgical industry, and in particular, to a sintering wet fuel sorting device. Background Technology

[0002] Solid fuel is one of the main fuels used in metallurgical sintering processes and is also a major source of carbon emissions in the iron and steel metallurgical industry. The particle size distribution of sintering solid fuel is an important parameter affecting the sintering effect. The particle size of the fuel coal used in sintering machines must be limited to a certain range, with a suitable particle size between 0.5 mm and 3 mm. Both excessively coarse and excessively fine solid fuel particles (less than 0.5 mm or greater than 3 mm) will significantly impact fuel utilization efficiency and the performance parameters of the sinter. Therefore, during the sintering process, it is generally required to control the fuel particle size within the range of 0.5 to 3 mm.

[0003] However, existing one- or two-stage fuel crushing processes lack fine particle sorting devices, making it difficult to accurately control the lower limit of fuel size. This results in the proportion of particles smaller than 0.5 mm (-0.5 mm) in the solid fuel sent to the sintering batching chamber after four-roll crushing reaching over 30%. Furthermore, due to the requirements of the sintering production process and fuel performance, existing sorting devices on the market are unable to meet the requirements for sorting sintering fuel with a particle size of around 0.5 mm. The main reasons are twofold: firstly, sintering solid fuels have high moisture content (generally 7-10%, but can reach 13% or even 15% in special cases), small particle size differences (full particle size distribution within the 0-5 mm range), and high output (the consumption of solid fuel in a 360 m² sintering machine is approximately 25 t / h). This makes existing screening devices prone to clogging the screen holes during operation, resulting in a screening efficiency of less than 50%. Secondly, the sintering production process has high requirements for fuel performance parameters, including moisture content. Using wet screening or drying followed by screening not only consumes a lot of energy but also makes it difficult for the finished product to meet the requirements.

[0004] Therefore, under the "dual carbon" background, in order to reduce solid energy consumption by starting with the fuel supply method and promote the low-carbon development of the sintering industry, it is necessary to develop a sorting device suitable for sintering solid fuels with high humidity and small particle size. This device can strictly control the proportion of fuel with particle size smaller than 0.5mm according to the production process requirements, thereby improving fuel utilization efficiency and further achieving the goal of "energy saving and consumption reduction". Summary of the Invention

[0005] The sintering wet fuel sorting device provided by the present invention solves the technical problem of poor sorting efficiency of existing fuel sorting devices for sintering wet fuel.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A sintering wet fuel sorting device includes a feeding mechanism, a material sorting mechanism, and an air supply mechanism. The material sorting mechanism has a material inlet, a dust outlet, and a discharge outlet. The feeding mechanism is located on the input side of the material sorting mechanism, and the air supply mechanism is located between the material inlet and the discharge outlet. The feeding mechanism is used to feed material into the material inlet. The material sorting mechanism includes a base frame, a vibrating conveyor, a vibration drive mechanism, a multi-stage sorting unit, an air hood, and a material dispersing unit. The vibrating conveyor is mounted on the base frame, and the vibration drive mechanism is used to drive the vibrating conveyor to vibrate. The multi-stage sorting unit is fixedly arranged on the vibrating conveyor for conveying materials as the vibrating conveyor vibrates. The material is covered by a hood on the base frame and encloses the multi-stage sorting unit to form an air-classifying chamber. The material inlet and dust outlet are located upstream and downstream of the hood, respectively. The air supply mechanism is located below the multi-stage sorting unit and is used to supply air into the air-classifying chamber from below the multi-stage sorting unit. The material dispersing unit is used to drive the head of the multi-stage sorting unit to vibrate, thereby dispersing the water-containing agglomerated material at the head. The dispersed material is vibrated and conveyed on the surface of the multi-stage sorting unit and air-classified in the air-classifying chamber. The air-classified dust material is output through the dust outlet, and the air-classified particulate material is output outside the air-classifying chamber through the tail of the multi-stage sorting unit.

[0008] Furthermore, the multi-stage sorting unit includes a fabric dispersing and conveying assembly, a primary sorting and conveying assembly, a secondary sorting and conveying assembly, and a tertiary sorting and discharging assembly arranged sequentially along the conveying direction. The fabric dispersing and conveying assembly, the primary sorting and conveying assembly, the secondary sorting and conveying assembly, and the tertiary sorting and discharging assembly are all fixedly mounted on the vibrating conveying table. The material inlet is located above the fabric dispersing and conveying assembly and on its input side. The fabric dispersing unit includes a fabric conveying plate and a conveying dispersing plate arranged sequentially along the conveying direction. The material inlet is located above the fabric conveying plate. The conveying dispersing plate is arranged downwardly along the conveying direction between the fabric conveying plate and the secondary sorting and conveying assembly. The fabric dispersing unit is used to drive the conveying dispersing plate to vibrate from the back of the conveying dispersing plate.

[0009] Furthermore, the primary sorting and conveying assembly includes a primary air distribution plate and a primary rectifier grid arranged sequentially along the conveying direction. The primary air distribution plate is arranged horizontally, and the primary rectifier grid is arranged downwardly along the conveying direction between the primary air distribution plate and the secondary sorting and conveying assembly. The primary air distribution plate is a double-layer perforated plate.

[0010] Furthermore, the primary air distribution plate includes air caps and upper and lower plates arranged at intervals along the height direction. The air caps are fixedly installed between the upper and lower plates, and multiple air caps are arranged in an array. Each air cap includes an air inlet section, a frustum section, and an annular section arranged coaxially. The air inlet section is provided with an axially penetrating air inlet hole. The frustum section is provided with an annular flow equalization chamber arranged in a ring. The annular section is provided with an annular air outlet chamber. The top surface of the annular section is provided with an air outlet hole communicating with the annular air outlet chamber. Multiple air outlet holes are arranged at intervals along the circumference of the annular section. The air inlet holes, the annular flow equalization chamber, and the annular air outlet chamber are interconnected.

[0011] Furthermore, the secondary sorting and conveying assembly includes a secondary air distribution plate and a secondary rectifier grid arranged sequentially along the conveying direction. The secondary rectifier grid is arranged at a downward angle along the conveying direction between the secondary air distribution plate and the tertiary sorting and discharging assembly.

[0012] Furthermore, the three-stage sorting and discharge assembly includes a three-stage air distribution plate and a discharge conveying plate arranged sequentially along the conveying direction. The discharge conveying plate is located downstream of the three-stage air distribution plate and extends out of the air separation chamber.

[0013] Furthermore, it also includes a material guiding and discharging mechanism, which includes a material guiding and discharging box located at the output end of the multi-stage sorting unit. The granular material after air separation is output from the tail end of the multi-stage sorting unit to the material guiding and discharging box outside the air separation chamber. The material guiding and discharging box has a downwardly arranged particle outlet, and an airlock discharge valve is arranged at the particle outlet.

[0014] Furthermore, the air hood includes an upper hood, a lower hood, and a baffle dispersing unit. The lower hood is fixedly mounted on the vibrating conveyor table and covers the multi-stage sorting unit. The upper hood is fixedly mounted on the base frame and presses over the lower hood. The upper and lower hoods are sealed together by a corrugated rubber sleeve. The upper and lower hoods, together with the multi-stage sorting unit, form an air separation chamber. The baffle dispersing unit is located on the upper hood and within the air separation chamber. The baffle dispersing unit includes a primary baffle assembly located above the primary sorting and conveying assembly and a secondary baffle assembly located above the secondary sorting and conveying assembly.

[0015] Furthermore, the primary baffle assembly includes a first lifting rod, a first lifting frame, and first wind deflectors spaced apart along the height direction on the first lifting frame. A second wind deflector is arranged between two adjacent first wind deflectors. Both the first and second wind deflectors are arranged on the side wall of the first lifting frame, with the first and second wind deflectors spaced apart. The first wind deflector includes a first window support rail, a first air guide window, and a first fixing block. The first window support rail and the first fixing block are respectively provided on the two side walls of the first lifting frame. The first window support rail is movably disposed on the side wall of the first lifting frame. The first fixing block is fixedly disposed on the side wall of the first lifting frame and is located below the first window support rail. The upper side of the first air guide window is mounted between two oppositely arranged first window support rails and is hinged. The lower side of the first air guide window is supported on the two first fixing blocks. It also includes a window adjustment component for driving the first window support rail to slide and position.

[0016] Furthermore, the air supply mechanism includes a primary air supply box, a secondary air supply box, a tertiary air supply box, air supply branch pipes, an air supply main pipe, and a blower. The primary, secondary, and tertiary air supply boxes are connected to the outlet end of the air supply main pipe through corresponding air supply branch pipes. The inlet end of the air supply main pipe is connected to the blower. The primary, secondary, and tertiary air supply boxes are flexibly connected to the vibrating conveyor table. The primary air supply box is located below the primary sorting and conveying assembly and has a primary air supply chamber for blowing air onto the primary sorting and conveying assembly. The secondary air supply box is located below the secondary sorting and conveying assembly and has a secondary air supply chamber for blowing air onto the secondary sorting and conveying assembly. The tertiary air supply box is located below the tertiary sorting and discharging assembly and has a tertiary air supply chamber for blowing air onto the tertiary sorting and discharging assembly.

[0017] The present invention has the following beneficial effects:

[0018] The sintering wet fuel sorting device of the present invention includes a feeding mechanism, a material sorting mechanism, and an air supply mechanism. The material sorting mechanism has a material inlet, a dust outlet, and a discharge outlet. By setting the material sorting mechanism to include a basic frame, a vibrating conveyor, a vibration drive mechanism, a multi-stage sorting unit, an air hood, and a material dispersing unit, sintering wet fuel enters the multi-stage sorting unit from the material inlet. The vibration drive mechanism drives the vibrating conveyor to vibrate synchronously with the multi-stage sorting unit. Fluidization sorting is performed under the action of air supply from the bottom of the multi-stage sorting unit by the air supply mechanism. The material dispersing unit is used to drive the head of the multi-stage sorting unit to vibrate, thereby dispersing the water-containing agglomerated material at the head. The dispersed material is vibrated and conveyed on the surface of the multi-stage sorting unit and undergoes multi-stage air separation in the air separation chamber. The dust material after air separation is output through the dust outlet, and the particulate material after air separation is output through the tail of the multi-stage sorting unit to the outside of the air separation chamber. This solves the technical problem of poor sorting efficiency of existing fuel sorting devices for sintering wet fuel.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is one of the structural schematic diagrams of a sintering wet fuel sorting device in one embodiment of the present invention;

[0022] Figure 2 This is a second schematic diagram of the sintering wet fuel sorting device in one embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0024] 4 is a schematic diagram of the structure of the primary air distribution plate of the sintering wet fuel sorting device in another embodiment of the present invention;

[0025] Figure 5 yes Figure 4 A three-dimensional structural diagram of a stroke cap;

[0026] Figure 6 This is a schematic diagram of the fabric dispersing and conveying assembly of the sintering wet fuel sorting device in another embodiment of the present invention;

[0027] Figure 7This is a three-dimensional structural schematic diagram of the primary baffle assembly of a sintering wet fuel sorting device according to one embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the planar structure of the primary baffle assembly of the sintering wet fuel sorting device in one embodiment of the present invention.

[0029] Legend:

[0030] 100. Sintering Moist Fuel Sorting Device; 10. Feeding Mechanism; 11. Hopper; 12. Roller Distributor; 13. Opening Adjuster; 20. Distributing and Sorting Mechanism; 201. Material Inlet; 202. Dust Outlet; 203. Discharge Outlet; 21. Base Frame; 22. Vibrating Conveyor; 23. Vibration Drive Mechanism; 24. Multi-stage Sorting Unit; 241. Distributing and Breaking Conveying Assembly; 2411. Distributing Conveying Plate; 2412. Distributing and Breaking Plate; 242. Primary Sorting and Conveying Assembly; 2421. Primary Air Distribution Plate; 24211. Air Cap; 2422. Primary Rectifying Grille; 243. Secondary Sorting and Conveying Assembly; 2431. Secondary Air Distribution Plate; 2432. Secondary Rectifying Grille; 244. Tertiary Sorting Discharge assembly; 2441, three-stage air distribution plate; 2442, discharge conveyor plate; 25, air hood; 251, upper hood; 252, lower hood; 253, baffle dispersing unit; 2531, first-stage baffle assembly; 25311, first lifting rod; 25312, first lifting frame; 25313, first baffle plate; 25314, second baffle plate; 25315, window adjustment component; 2532, second-stage baffle assembly; 26, fabric dispersing unit; 27, material guiding and discharging mechanism; 271, material guiding and discharging box; 30, air supply mechanism; 31, first-stage air supply box; 32, second-stage air supply box; 33, third-stage air supply box; 34, air supply branch pipe; 35, air supply main pipe; 36, blower; 37, flow regulating valve. Detailed Implementation

[0031] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not 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 creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 as well as Figure 8 As shown, the present invention provides a sintering wet fuel sorting device 100, including a feeding mechanism 10, a material sorting mechanism 20, and an air supply mechanism 30. The material sorting mechanism 20 has a material inlet 201, a dust outlet 202, and a discharge outlet 203. The feeding mechanism 10 is located on the input side of the material sorting mechanism 20, and the air supply mechanism 30 is located between the material inlet 201 and the discharge outlet 203. The feeding mechanism 10 is used to feed material to the material inlet 201. The material sorting mechanism 20 includes a base frame 21, a vibrating conveyor table 22, a vibration drive mechanism 23, a multi-stage sorting unit 24, an air hood 25, and a material dispersing unit 26. The vibrating conveyor table 22 is mounted on the base frame, and the vibration drive mechanism 23 is used to drive the vibrating conveyor table 22 to vibrate. The multi-stage sorting unit 24 is fixedly arranged on the vibrating conveyor table 22. The conveying platform 22 is used to convey materials by vibrating with the vibrating conveyor platform 22. The air hood 25 is installed on the base frame and encloses the multi-stage sorting unit 24 to form an air classifying chamber. The material inlet 201 and the dust outlet are respectively located upstream and downstream of the air hood 25. The air supply mechanism 30 is located below the multi-stage sorting unit 24. The air supply mechanism 30 is used to supply air from the bottom of the multi-stage sorting unit 24 into the air classifying chamber. The material dispersing unit 26 is used to drive the head of the multi-stage sorting unit 24 to vibrate, thereby dispersing the water-containing agglomerated material at the head. The dispersed material after vibration is conveyed on the surface of the multi-stage sorting unit 24 and air classified in the air classifying chamber. The dust material after air classification is output through the dust outlet 202, and the particulate material after air classification is output through the tail of the multi-stage sorting unit 24 to the outside of the air classifying chamber.

[0036] The present invention provides a sintering wet fuel sorting device 100, including a feeding mechanism 10, a material sorting mechanism 20, and an air supply mechanism 30. The material sorting mechanism 20 has a material inlet 201, a dust outlet 202, and a discharge outlet 203. The material sorting mechanism 20 includes a base frame 21, a vibrating conveyor table 22, a vibration drive mechanism 23, a multi-stage sorting unit 24, an air hood 25, and a material dispersing unit 26. Sintering wet fuel enters the multi-stage sorting unit 24 from the material inlet 201. The vibration drive mechanism 23 drives the vibrating conveyor table 22 and the multi-stage sorting unit 24 to move together. The system uses a step vibration mechanism. Under the action of air supply mechanism 30, air is supplied from the bottom of the multi-stage sorting unit 24 for fluidized separation. The material dispersing unit 26 is used to drive the head of the multi-stage sorting unit 24 to vibrate, thereby dispersing the water-containing agglomerated material at the head. The dispersed material is conveyed by vibration on the surface of the multi-stage sorting unit 24 and undergoes multi-stage air separation in the air separation chamber. The dust material after air separation is output through the dust outlet 202, and the particulate material after air separation is output through the tail of the multi-stage sorting unit 24 to the outside of the air separation chamber. This solves the technical problem of poor separation efficiency of existing fuel sorting devices for sintered wet fuel.

[0037] The sintering wet fuel sorting device 100 provided by the present invention can fully separate materials smaller than 0.5 mm from wet fine coal powder with a moisture content in the range of 7% to 20% and a particle size distribution of 0 to 5 mm. This solves the technical problem that existing raw fuel is directly fed into sintering production without any treatment after being crushed, resulting in too many particles smaller than 0.5 mm and low sintering utilization efficiency.

[0038] Understandably, the vibration drive mechanism 23 can be a centrifugal drive, a linkage drive, or an ordinary vibration motor, as long as the vibration drive mechanism 23 drives the vibrating conveyor table 22 to reciprocate and thus drives the multi-stage sorting unit 24 to transport materials.

[0039] Understandably, in this invention, the vibrating conveyor 22 can be movably set relative to the base frame 21 by arranging a return spring between the vibrating conveyor 22 and the base frame 21.

[0040] Furthermore, the multi-stage sorting unit 24 includes a fabric dispersing and conveying assembly 241, a primary sorting and conveying assembly 242, a secondary sorting and conveying assembly 243, and a tertiary sorting and discharging assembly 244 arranged sequentially along the conveying direction. The fabric dispersing and conveying assembly 241, the primary sorting and conveying assembly 242, the secondary sorting and conveying assembly 243, and the tertiary sorting and discharging assembly 244 are all fixedly mounted on the vibrating conveyor table 22, and the material inlet 201 is located above the fabric dispersing and conveying assembly 241. The fabric dispersing and conveying assembly 241 is located on the input side of the fabric dispersing and conveying unit 241. The fabric dispersing unit includes a fabric conveying plate 2411 and a conveying dispersing plate 2412 arranged sequentially along the conveying direction. The material inlet 201 is located above the fabric conveying plate 2411. The conveying dispersing plate 2412 is arranged inclined downward along the conveying direction between the fabric conveying plate 2411 and the secondary sorting and conveying assembly. The fabric dispersing unit 26 is used to drive the conveying dispersing plate 2412 to vibrate from the back of the conveying dispersing plate 2412. It can be understood that in the present invention, the fabric conveying plate 2411 is arranged horizontally, and both the fabric conveying plate 2411 and the conveying dispersing plate 2412 are blind plates. In practice, the sorting process includes agglomerated material dispersing, fluidization stratification, precision grading, and vibration conveying. Agglomerated material dispersing is mainly achieved by the cloth dispersing and conveying assembly 241. Fluidization stratification is mainly achieved by the primary sorting and conveying assembly 242, the secondary sorting and conveying assembly 243, and / or the baffle dispersing unit 253 under the action of wind. Precise grading is mainly achieved by the tertiary sorting and discharging assembly 244 under the action of wind.

[0041] Furthermore, the fabric dispersing unit includes a striking bracket, a striking vibrating rod, and a striking driver. The striking driver is fixedly mounted on the base frame 21, the striking bracket is fixedly mounted on the vibrating conveyor table 22, the first end of the striking vibrating rod is fixedly mounted on the striking bracket and electrically connected to the striking driver, and the second end of the striking driver rod is arranged from the back of the conveying dispersing plate 2412 toward the conveying dispersing plate 2412.

[0042] Furthermore, the striking driving rods are arranged in a direction perpendicular to the conveying and dispersing plate 2412, and multiple striking driving rods are arranged at intervals along the width direction of the conveying and dispersing plate 2412.

[0043] More preferably, the vibrating rod drives the conveying dispersing plate 2412 to generate high-frequency vibration. By arranging the material dispersing unit, during the material conveying process, the material reaching the conveying dispersing plate 2412 can improve the uniformity of the material layer distribution under the high-frequency resonance of the vibrating rod, and at the same time, it can also achieve the initial vibration separation of agglomerated materials.

[0044] Furthermore, the primary sorting and conveying assembly includes a primary air distribution plate 2421 and a primary rectifier grid 2422 arranged sequentially along the conveying direction. The primary air distribution plate 2421 is arranged horizontally, and the primary rectifier grid 2422 is arranged downwardly along the conveying direction between the primary air distribution plate 2421 and the secondary sorting and conveying assembly 243. The primary air distribution plate is a double-layer perforated plate.

[0045] Further, the primary air distribution plate 2421 includes an air cap 24211 and upper and lower plates arranged at intervals along the height direction. The air cap 24211 is fixedly disposed between the upper and lower plates. Multiple air caps 24211 are arranged in an array. Each air cap 24211 includes an inlet section, a frustum section (diffuser section), and an annular section (flow equalization section) arranged coaxially. The inlet section has an axially penetrating air inlet hole. The frustum section has an annular flow equalization chamber arranged in a ring. The annular section has an annular air outlet chamber. The top surface of the annular section has an air outlet hole communicating with the annular air outlet chamber. Multiple air outlet holes are arranged at intervals along the circumference of the annular section. The air inlet holes, the annular flow equalization chamber, and the annular air outlet chamber are interconnected. More preferably, the air outlet holes are arranged inclined outward along the axial direction. In a specific embodiment of the present invention, eight air outlet holes are provided.

[0046] Furthermore, it also includes a shelf fastening connector, with the upper and lower shelves arranged and fixed at intervals by the shelf fastening connector, the top of the hood 24211 being interference-fitted onto the upper shelf, and the bottom of the hood 24211 being interference-fitted onto the lower shelf. In actual operation, the air cap 24211 is embedded between the upper and lower plates. The ambient temperature air in the primary air supply chamber enters the air cap 24211 through the air inlet, passes through the diffusion section and the flow equalization section in sequence, and is then evenly divided into 8 streams that act on the material layer through the air outlet. The air cap 24211 does not need to extend into the material layer, which is more suitable for thin material layers than the existing air cap 24211 form. It can not only enhance the jet velocity when acting on the material and prevent the occurrence of blind spots in the jet action, but also the slightly tilted angle of the air outlet can enhance the collision between materials in the action area of ​​the primary air distribution plate 2421, thereby further promoting the separation of agglomerated materials. In addition, compared with the traditional straight hole type air distribution plate, the resistance of this double-layer multi-hole air distribution plate will not be significantly different.

[0047] Furthermore, the secondary sorting and conveying assembly includes a secondary air distribution plate 2431 and a secondary rectifier grid 2432 arranged sequentially along the conveying direction. The secondary rectifier grid 2432 is arranged downwardly along the conveying direction between the secondary air distribution plate 2431 and the tertiary sorting and discharging assembly 244. More preferably, the secondary air distribution plate 2431 is arranged horizontally.

[0048] Furthermore, the three-stage sorting and discharge assembly 244 includes a three-stage air distribution plate 2441 and a discharge conveying plate 2442 arranged sequentially along the conveying direction. The discharge conveying plate 2442 is located downstream of the three-stage air distribution plate 2441 and extends out of the air separation chamber.

[0049] Furthermore, it also includes a material guiding and discharging mechanism 27, which includes a material guiding and discharging box 271 located at the output end of the multi-stage sorting unit 24. The particulate material after air separation is output from the tail end of the multi-stage sorting unit 24 to the material guiding and discharging box 271 outside the air separation chamber. The material guiding and discharging box 271 has a downwardly arranged particle outlet, and an airlock discharge valve is arranged at the position of the particle outlet (discharge outlet). In a specific implementation, the material guiding and discharging box 271 is located on the air hood 25 and covers the extended end of the discharge conveyor plate 2442.

[0050] Furthermore, the air hood 25 includes an upper hood 251, a lower hood 252, and a baffle dispersing unit 253. The lower hood 252 is fixedly mounted on the vibrating conveyor table 22 and covers the multi-stage sorting unit 24. The upper hood 251 is fixedly mounted on the base frame and presses over the lower hood 252. The upper hood 251 and the lower hood 252 are sealed together by a corrugated rubber sleeve. The upper hood 251 and the lower hood 252 together with the multi-stage sorting unit 24 form an air separation chamber. The baffle dispersing unit 253 is mounted on the upper hood 251 and is located within the air separation chamber. The baffle dispersing unit 253 includes a primary baffle assembly 2531 located above the primary sorting and conveying assembly and a secondary baffle assembly 2532 located above the secondary sorting and conveying assembly 243. In the present invention, the wind hood 25 includes an upper hood 251 and a lower hood 252. The lower hood 252 vibrates with the vibrating conveyor table 22 to prevent leakage during feeding. The upper hood 251 is sealed on the lower hood 252 to ensure wind separation performance. At the same time, the baffle breaking unit 253 is arranged on the upper hood 251, which can break up the rising material and does not vibrate itself.

[0051] Further, the primary baffle assembly 2531 includes a first lifting rod 25311, a first lifting frame 25312, and first wind deflectors 25313 spaced apart along the height direction on the first lifting frame 25312. A second wind deflector 25314 is arranged between two adjacent first wind deflectors 25313. Both the first and second wind deflectors are arranged on the side wall of the first lifting frame, with the first wind deflectors 25313 and the second wind deflectors 25314 spaced apart. The first wind deflector 25313 includes a first window support rail, a first air guide window, and a first fixing block. The first window support rail and the first fixing block are respectively provided on the two side walls of the first lifting frame 25312. The window support rail is movably mounted on the side wall of the first hoisting frame 25312. The first fixing block is fixed on the side wall of the first hoisting frame and located below the first window support rail. The upper side of the first air guide window is mounted between two oppositely arranged first window support rails and is hinged. The lower side of the first air guide window is supported on two first fixing blocks. The first air guide window is arranged along a first oblique direction on the corresponding first fixing block. The second wind deflector 25314 includes a second window support rail, a second air guide window, and a second fixing block. The second window support rail and the second fixing block are respectively provided on the two side walls of the second hoisting frame. The second window support rail is movably mounted on the side wall of the second hoisting frame. The second fixing block is fixedly mounted on the side wall of the second frame and located below the second window support rail. The upper side of the second air guide window is mounted between the two oppositely arranged second window support rails and is hinged. The lower side of the second air guide window is supported on the two second fixing blocks. The second air guide window is arranged on the corresponding second fixing block along the second oblique direction, which is opposite to the first oblique direction. It also includes a window adjustment component 25315 for driving the first window support rail and / or the second window support rail to slide and position.

[0052] In the present invention, the tilt angle of the first air guide window can be changed when the first window support rail is driven to slide by the window adjustment component 25315, and the tilt angle of the second air guide window can be changed when the second window support rail is driven to slide by the window adjustment component 25315.

[0053] Optionally, the window adjustment component 25315 adopts a hydraulic push rod component. In one specific embodiment, the window adjustment component 25315 includes a first hydraulic push rod, a second hydraulic push rod, and a movable connecting rod. The first hydraulic push rod is located above the uppermost first wind deflector 25313, and the second hydraulic push rod is located below the lowermost first wind deflector 25313. The two ends of the movable connecting rod are respectively movably connected to the movable ends of the first and second hydraulic push rods. The middle part of the movable connecting rod is movably connected to the first window support rail and the second window support rail. The fixed ends of the first and second hydraulic push rods are respectively installed on the side wall of the first hoisting frame 25312. This realizes that the movable connecting rod is driven to swing by the extension and retraction of the first and / or second hydraulic push rods, thereby driving the first and second window support rails to slide, and finally adjusting the tilt angle of the first and second air guide windows.

[0054] In the present invention, the structure of the secondary baffle assembly 2532 is the same as that of the primary baffle assembly 2531.

[0055] In a preferred embodiment, the first lifting rod 25311 is a telescopic adjustable rod. By setting the first lifting rod 25311 as a telescopic adjustable rod, the height between the primary baffle assembly 2531 and the primary air distribution plate 2421 can be adjusted. Furthermore, the height of the secondary baffle assembly 2532 relative to the secondary air distribution plate 2431 is adjustable. In use, the installation height of the primary baffle assembly 2531 and the installation height of the secondary baffle assembly 2532 can be adjusted according to the required sorting effect.

[0056] Understandably, in specific implementation, the primary baffle assembly 251 consists of a first hoisting frame 25312, a first wind deflector 25313 (first-layer baffle assembly), a second wind deflector 25314 (second-layer baffle assembly), a first wind deflector 25312 (third-layer baffle assembly), a fixing block, and a window adjusting component 25315. The first hoisting frame 25312 is directly fixed to the upper cover 251 via the first hoisting rod 25311. The first-layer baffle assembly, the second-layer baffle assembly, and the third-layer baffle assembly are respectively located within the first hoisting frame 25312. The primary baffle assembly 2531 does not participate in the vibration of the main system. The baffle assembly includes three layers of baffles arranged in a staggered manner from bottom to top. On the one hand, it is used to provide further impact force to the material being impacted by the jet. The larger the particle size of the material acting on the baffle assembly, the greater the impact force on the material, thereby promoting the separation of agglomerated materials. On the other hand, when the inertia of the material under the impact of the jet is greater than the resistance of one layer of baffle assembly, the material will pass through one layer of baffle assembly and move upward. The setting of the three layers of baffle assembly can ensure that the material of each particle size can fall back to the upper part of the first-stage air distribution plate 2421 under the action of resistance, preventing the material from being drawn away by the negative pressure of the dust removal port (dust outlet 202).

[0057] Furthermore, the air supply mechanism 30 includes a primary air supply box 31, a secondary air supply box 32, a tertiary air supply box 33, air supply branch pipes 34, a main air supply pipe 35, and a blower 36. The primary air supply box 31, the secondary air supply box 32, and the tertiary air supply box 33 are connected to the outlet end of the main air supply pipe 35 through corresponding air supply branch pipes 34. The inlet end of the main air supply pipe 35 is connected to the blower 36. The primary air supply box 31, the secondary air supply box 32, and the tertiary air supply box 33... Each is flexibly connected to the vibrating conveyor 22. The primary air supply box 31 is located below the primary sorting and conveying assembly 242 and has a primary air supply chamber for blowing air into the primary sorting and conveying assembly 242. The secondary air supply box 32 is located below the secondary sorting and conveying assembly 243 and has a secondary air supply chamber for blowing air into the secondary sorting and conveying assembly 243. The tertiary air supply box 33 is located below the tertiary sorting and discharging assembly and has a tertiary air supply chamber for blowing air into the tertiary sorting and discharging assembly.

[0058] Furthermore, ash discharge valves are arranged at the bottom of the primary air supply box 31, the secondary air supply box 32, and the tertiary air supply box 33, and flow regulating valves 37 are arranged on the air supply branch pipe 34.

[0059] Furthermore, the feeding mechanism 10 includes a hopper 11, a roller feeder 12, and an opening regulator 13. The bottom of the hopper 11 has a discharge outlet 203, and the opening regulator 13 is located upstream of the roller feeder 12 to adjust the amount of material entering the roller feeder 12.

[0060] The present invention provides a specific sintering wet fuel sorting device as follows:

[0061] The fabric conveying plate 2411 and the conveying dispersing plate 2412 are non-perforated blind plates. The back of the conveying dispersing plate 2412 is provided with vibrator mounting holes. The first-stage air distribution plate 2421 is a double-layer perforated air distribution plate. The second-stage air distribution plate 2431 and the third-stage air distribution plate 2441 are single-layer perforated air distribution plates. The first-stage rectifier grid 2422 and the second-stage rectifier grid 2432 are non-perforated blind plates. At the same time, staggered material distribution grids are provided on them. The fabric conveyor plate 2411, conveyor dispersing plate 2412, primary air distribution plate 2421, primary rectifier grid 2422, secondary air distribution plate 2431, secondary rectifier grid 2432, tertiary air distribution plate 2441, and discharge conveyor plate 2442 are welded to the vibrating conveyor table 22 and are supported by a support frame. The vibrating conveyor table 22 is connected to the upper cover 251 and the lower air chambers (primary, secondary, and tertiary air chambers) using flexible connections. The vibrating motor is bolted to the vibrating conveyor table 22, and only the middle section vibrates during operation to reduce the system's vibration load. A vibrating rod mounting bracket (impact bracket) is welded to the lower part of the conveyor dispersing plate 2412. The upper part of the impact vibrating rod is fixed to the conveyor dispersing plate 2412 via the impact bracket, and the lower part is connected to a cable. The impact bracket, the impact vibrating rod, and the conveyor dispersing plate 2412 all participate in the system vibration. A first hoisting frame 25312 is arranged at the corresponding position of the upper cover 251. The first-level baffle assembly 2531 is not connected to the vibrating conveyor table 22 and does not participate in the system vibration. The air chamber includes a first-level air supply chamber, a second-level air supply chamber, and a third-level air supply chamber. The upper part is sealed and connected to the first-level air distribution plate 2421, the second-level air distribution plate 2431, and the third-level air distribution plate 2441, respectively. The lower part is connected to the first-level air supply branch pipe 34, the second-level air supply branch pipe 34, and the third-level air supply branch pipe 34, respectively. Each air chamber is equipped with a guide plate assembly to ensure the uniformity of air velocity distribution in each area of ​​the air distribution plate. At the same time, since the air velocity requirements of each part of the sorting system are different, each air supply branch pipe 34 is equipped with a flow regulating valve 37, which can adjust the air velocity of each air distribution plate according to requirements. In addition, considering that material spillage may occur during the operation of the air distribution plate, each air chamber is equipped with an ash discharge port at the bottom to facilitate the emptying of the air distribution holes and ensure the normal operation of the air supply system.

[0062] The specific usage process of the sintering wet fuel sorting device provided by this invention is as follows:

[0063] When the material reaches the primary air distribution plate 2421, it is subjected to the dual effects of high-frequency vibration from the vibrating motor and high-speed jet impact from the micropores on the double-layer porous air distribution plate (the outlet jet velocity is approximately 30~35m / s). The material layer is blown upwards and rapidly fluidized. The impact of the high-speed jet causes the fine particles adhering to the large particles and the aggregated small particles to initially separate under the action of the liquid bridge force. Simultaneously, a primary baffle assembly is installed on the upper part of the primary air distribution plate 2421. After being impacted by the high-pressure jet, the material will sequentially strike the three layers of baffle plates and then fall back to the primary air distribution plate under the resistance of the baffle plates. On 2421, the material impacts the baffle plate again due to the high-speed jet, repeating the process of impact, collision, and falling. During this process, due to the high fluidization speed of the material, the corresponding kinetic energy is also large, and the impact on the material when it hits the baffle plate is also strong. This allows the agglomerated material that failed to separate under the impact of the high-pressure jet to be separated under the strong impact. This impact is more obvious for larger particles. At the same time, the three layers of baffle plates are arranged in a staggered and inclined manner, with the particle size of the material blocked at the top decreasing, in order to prevent the material that has not been fully separated from being directly drawn away from the dust collection port. Because the impact of the micro-perforated jet from the primary air distribution plate 2421 is relatively large, coupled with the resistance of the upper primary baffle assembly, the movement of the material in this area will be relatively chaotic, and the unevenness of the material layer distribution may be affected. Therefore, a primary rectifier grid 2422 is set after the primary air distribution plate 2421, which can not only adjust the uniformity of the material distribution on the air distribution plate, but also, to a certain extent, change the mixing of the material on the primary air distribution plate 2421 so that the range of material affected by the jet is wider.

[0064] Upon reaching the secondary air distribution plate 2431, the material will also exhibit a fluidized state under high-frequency excitation and micro-jet propagation. However, due to the reduced velocity of the micro-jet (outlet jet velocity is approximately 15~20 m / s), the regularity of the motion will be significantly enhanced, essentially presenting a boiling fluidized bed. Initially, during fluidization, the material will be thrown up by the micro-jet, with larger particles falling and smaller particles being carried out of the material layer by the airflow. As the fluidization stabilizes, obvious stratification will occur. A secondary baffle assembly is also installed above the secondary air distribution plate 2431. This serves two purposes: firstly, it separates agglomerated materials that failed to separate within the area of ​​the primary air distribution plate 2421; secondly, it prevents materials with a particle size of +0.5 mm from being drawn away by the negative pressure of the dust collector. However, because the distance between the secondary air distribution plate 2431 and the secondary baffle assembly is relatively large, and the jet velocity is reduced, the amount of material blocked by the secondary baffle assembly is also reduced. Therefore, the density of the baffle plates is correspondingly reduced. A secondary rectifier grid 2432 is installed after the secondary air distribution plate 2431, which is mainly used to enhance the uniformity of material layer distribution.

[0065] Upon reaching the third-stage air distribution plate 2441, the velocity of the micro-jet will further decrease (the outlet jet velocity is approximately 8~12 m / s). The material movement also exhibits a state where coarse particles are concentrated in the lower part of the bed, while fine particles are suspended in the upper part of the bed. As the material moves upward, the jet gradually weakens, and the particle size of the material falling further down becomes smaller. The distance between the third-stage distribution plate and the dust removal port is sufficient to allow +0.5 mm particles to fall. At the same time, the dust removal port adopts a slight negative pressure, which can transport -0.5 mm particles to the dust removal system for recycling. Meanwhile, the coarse particles falling onto the third-stage air distribution plate 2441 continue to move forward under the action of the vibrating motor, and are recycled from the coarse particle discharge port (discharge outlet 203) after passing through the discharge conveyor plate 2442.

[0066] The specific operating parameters of this invention include: the vibration frequency of the vibratory conveyor is 800~1000 times / minute; the initial dispersion impact frequency is 8000~10000 times / minute; the uniform fabric thickness is 30~50mm; the ambient air temperature is 20~30 degrees Celsius; and the hot air temperature is 60~80 degrees Celsius.

[0067] The beneficial effects of this invention mainly include: the sintering wet light and fine fuel sorting device proposed in this invention can reduce the proportion of -0.5mm (less than 0.5mm) particle size fuel in sintering fuel according to process requirements, improve fuel utilization efficiency and sintering production indicators, and reduce solid energy consumption in the sintering production process; the sintering wet light and fine fuel sorting device proposed in this invention achieves the sorting of wet light and fine fuel through the sorting principle of strong dispersion of agglomerated materials, fluidization stratification, and precise grading. Compared with traditional sorting devices, it has the advantages of good separation effect, high sorting efficiency, and low system energy consumption.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sintered wet fuel sorting device, characterized in that, The system includes a feeding mechanism, a fabric sorting mechanism, and an air supply mechanism. The fabric sorting mechanism has a material inlet, a dust outlet, and a discharge outlet. The feeding mechanism is located on the input side of the fabric sorting mechanism, and the air supply mechanism is located between the material inlet and the discharge outlet. The feeding mechanism is used to feed material to the material inlet. The fabric sorting mechanism includes a base frame, a vibrating conveyor, a vibration drive mechanism, a multi-stage sorting unit, an air hood, and a fabric dispersing unit. The vibrating conveyor is mounted on the base frame, and the vibration drive mechanism drives the vibrating conveyor to vibrate. The multi-stage sorting unit is fixedly arranged on the vibrating conveyor to transport materials as the conveyor vibrates. The air hood covers the base frame and encloses the multi-stage sorting unit to form an air-separating chamber. The material inlet and the dust outlet are located upstream and downstream of the air hood, respectively. The air supply mechanism is located below the multi-stage sorting unit. It supplies air from below the multi-stage sorting unit into the air-separating chamber. The fabric dispersing unit drives the head of the multi-stage sorting unit to vibrate, thereby dispersing the water-containing agglomerates at the head. The dispersed material is then vibrated and conveyed on the surface of the multi-stage sorting unit and subjected to air separation in the air-separating chamber. The air-separated dust material is output through the dust outlet, and the air-separated particulate material is output through the tail of the multi-stage sorting unit to the outside of the air-separating chamber. The multi-stage sorting unit includes a fabric dispersing and conveying assembly, a primary sorting and conveying assembly, a secondary sorting and conveying assembly, and a tertiary sorting and discharging assembly arranged sequentially along the conveying direction. All three assemblies—the fabric dispersing and conveying assembly, the primary sorting and conveying assembly, the secondary sorting and conveying assembly, and the tertiary sorting and discharging assembly—are fixedly mounted on the vibrating conveying table. The material inlet is located above and on the input side of the fabric dispersing and conveying assembly. The air hood includes an upper hood, a lower hood, and a baffle dispersing unit. The lower hood is fixedly mounted on the vibrating conveyor platform and covers the multi-stage sorting unit. The upper hood is fixedly mounted on the base frame and covers the lower hood. The upper hood and the lower hood are sealed together by a corrugated rubber sleeve. The upper hood and the lower hood, together with the multi-stage sorting unit, form the air classifying chamber. The baffle dispersing unit is located on the upper hood and within the air classifying chamber. The baffle dispersing unit includes a primary baffle assembly located above the primary sorting and conveying assembly and a secondary baffle assembly located above the secondary sorting and conveying assembly.

2. The sintered wet fuel sorting device according to claim 1, characterized in that, The fabric dispersing unit includes a fabric conveying plate and a conveying dispersing plate arranged sequentially along the conveying direction. The material inlet is located above the fabric conveying plate. The conveying dispersing plate is arranged inclined downward along the conveying direction between the fabric conveying plate and the secondary sorting and conveying assembly. The fabric dispersing unit is used to drive the conveying dispersing plate to vibrate from the back of the conveying dispersing plate.

3. The sintered wet fuel sorting device according to claim 2, characterized in that, The primary sorting and conveying assembly includes a primary air distribution plate and a primary rectifier grid arranged sequentially along the conveying direction. The primary air distribution plate is arranged horizontally, and the primary rectifier grid is arranged downwardly between the primary air distribution plate and the secondary sorting and conveying assembly along the conveying direction. The primary air distribution plate is a double-layer perforated plate.

4. The sintered wet fuel sorting device according to claim 3, characterized in that, The primary air distribution plate includes air hoods and upper and lower plates arranged at intervals along the height direction. The air hoods are fixedly disposed between the upper and lower plates, and multiple air hoods are arranged in an array. The wind cap includes an inlet section, a frustum section, and an annular section arranged coaxially. The inlet section has an axially penetrating inlet hole. The frustum section has an annular flow equalization chamber arranged in a ring. The annular section has an annular outlet chamber. The top surface of the annular section has an outlet hole communicating with the annular outlet chamber. Multiple outlet holes are arranged at intervals along the circumference of the annular section. The air inlet, the annular flow equalization chamber, and the annular air outlet chamber are interconnected.

5. The sintered wet fuel sorting device according to claim 2, characterized in that, The secondary sorting and conveying assembly includes a secondary air distribution plate and a secondary rectifier grid arranged sequentially along the conveying direction. The secondary rectifier grid is arranged at a downward angle along the conveying direction between the secondary air distribution plate and the tertiary sorting and discharging assembly.

6. The sintered wet fuel sorting device according to claim 2, characterized in that, The three-stage sorting and discharge assembly includes a three-stage air distribution plate and a discharge conveying plate arranged sequentially along the conveying direction. The discharge conveying plate is located downstream of the three-stage air distribution plate and extends out of the air separation chamber.

7. The sintering wet fuel sorting device according to claim 1, characterized in that, It also includes a material guiding and discharging mechanism, which includes a material guiding and discharging box located at the output end of the multi-stage sorting unit. After air separation, the particulate material is output from the tail end of the multi-stage sorting unit to the material guide and discharge box outside the air separation chamber. The material guide and discharge box has a downwardly arranged particulate outlet, and an airlock discharge valve is arranged at the particulate outlet.

8. The sintering wet fuel sorting device according to claim 1, characterized in that, The primary baffle assembly includes a first lifting rod, a first lifting frame, and first wind deflectors spaced apart along the height direction on the first lifting frame. A second wind deflector is arranged between two adjacent first wind deflectors. Both the first and second wind deflectors are arranged on the side wall of the first lifting frame, with the first and second wind deflectors spaced apart. The first wind deflector includes a first window support rail, a first air guide window, and a first fixing block. The first window support rail and the first fixing block are respectively provided on two side walls of the first hoisting frame. The first window support rail is movably disposed on the side wall of the first hoisting frame. The first fixing block is fixedly disposed on the side wall of the first hoisting frame and located below the first window support rail. The upper side of the first air guide window is mounted between two oppositely arranged first window support rails and is hinged. The lower side of the first air guide window is supported on two first fixing blocks. It also includes a window adjustment component for driving the first window support rail to slide and position.

9. The sintering wet fuel sorting device according to claim 1, characterized in that, The air supply mechanism includes a primary air supply box, a secondary air supply box, a tertiary air supply box, air supply branch pipes, an air supply main pipe, and a blower. The primary, secondary, and tertiary air supply boxes are connected to the outlet of the air supply main pipe via corresponding air supply branch pipes. The inlet of the air supply main pipe is connected to the blower. The primary, secondary, and tertiary air supply boxes are flexibly connected to the vibrating conveyor table. The primary air supply box is located below the primary sorting and conveying assembly and has a primary air supply chamber for blowing air into the primary sorting and conveying assembly. The secondary air supply box is located below the secondary sorting and conveying assembly and has a secondary air supply chamber for blowing air into the secondary sorting and conveying assembly. The tertiary air supply box is located below the tertiary sorting and discharging assembly and has a tertiary air supply chamber for blowing air into the tertiary sorting and discharging assembly.

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