Metal-containing sludge filtering equipment and treatment method for incinerator slag

Abstract

The invention relates to the technical field of sludge treatment, and discloses metal-containing sludge filtering equipment and a treatment method for incinerator slag. In a stirring state, the magnetic adsorption mechanism is electrified to generate magnetism, ferromagnetic metal in sludge is collected towards one end close to the magnetic adsorption mechanism, and part of the sludge rich in the ferromagnetic metal is discharged from the metal discharge port through a pipeline, so that the ferromagnetic metal contained in the sludge can be enriched, and the ferromagnetic metal is collected; through the stirring process, the dispersion degree of the sludge is ensured, and the sludge is prevented from being accumulated at the concentrated discharge port and overflowing out of the centrifugal sleeve; in a centrifugal state, the sludge is layered under the high-speed action, the separated sewage moves towards one end of the sewage discharge port under the driving of the spiral conveyor, the separated sewage is discharged, and the concentrated sludge is continuously accumulated at one end close to the concentrated discharge port and is discharged after passing through the concentrated discharge port; and the concentrated sludge and the separated sewage can be effectively separated.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, in particular to a metal-containing sludge filtering device and a method for treating incinerator slag. Background Art

[0002] Traditional sludge treatment methods primarily include landfilling, solidification and stabilization, and chemical precipitation. However, these methods often fail to effectively separate metal components, leading to the loss of metal resources. Early sludge filtration equipment primarily employed mechanical filter pressing, centrifugal separation, or chemical-assisted precipitation. However, these technologies are inefficient in capturing metal particles, especially ferromagnetic metals, which often exist in sludge as fine particles or oxides, making it difficult to achieve high-purity separation using traditional filtration methods.

[0003] With the rapid development of industrialization and urbanization, incinerators, as important facilities for waste disposal and energy recovery, produce slag and sludge containing a large amount of metal components, particularly ferromagnetic metals (such as iron, nickel, and cobalt). If these metals are not effectively recovered, they not only waste resources but can also cause secondary environmental pollution due to heavy metal leakage. Recovering ferromagnetic metals from incinerator slag and sludge has significant economic, environmental, and resource sustainability benefits. Ferromagnetic metals recovered from the sludge can be directly used in the steelmaking or foundry industry, reducing reliance on primary ore.

[0004] Currently, magnetic separation technology is used to separate ferromagnetic metals from sludge containing magnetic metals through permanent magnets or electromagnetic devices, significantly improving metal recovery rates. However, existing magnetic separation equipment requires magnetic metals to be extracted from sludge with high viscosity. This makes it difficult to directly extract magnetic metals from the sludge and can easily contaminate the magnetic separation equipment. Over long-term magnetic separation processes, the equipment becomes contaminated by sludge, significantly reducing its magnetic absorption efficiency. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a metal-containing sludge filtering device and a method for treating incinerator slag.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A metal-containing sludge filtering device comprises a protective shell, a mounting bracket is provided inside the protective shell, a buffer bracket is provided on the top of the mounting bracket, a mounting sleeve is provided inside the buffer bracket, and a centrifugal sleeve is sleeved inside the mounting sleeve; a centrifugal driving mechanism is provided on the top of the buffer bracket, and under the drive of the centrifugal sleeve, the centrifugal sleeve can rotate at two speeds, namely, a stirring state and a centrifugal state; a concentration discharge port and a sewage discharge port are respectively provided at both ends of the centrifugal sleeve, a magnetic adsorption mechanism is provided on the outer side of the centrifugal sleeve and at one end close to the sewage discharge port, and a metal discharge port is also provided on the end of the centrifugal sleeve close to the sewage discharge port; a screw is also provided inside the centrifugal sleeve A screw conveyor is connected to the centrifugal drive mechanism through a differential; when the centrifugal sleeve is in a stirring state, the centrifugal sleeve performs a reciprocating low-speed motion, and the magnetic adsorption mechanism generates magnetism, gathering the ferromagnetic metal in the sludge to one end close to the magnetic adsorption mechanism, and can discharge part of the sludge rich in ferromagnetic metal from the metal discharge port; when the centrifugal sleeve is in a centrifugal state, the centrifugal sleeve performs high-speed centrifugal rotation, and the screw conveyor performs a co-directional motion at a speed lower than that of the centrifugal sleeve, and the sludge is stratified under the action of high speed, and the screw conveyor drives the concentrated sludge to move toward one end of the concentrated discharge port, and drives the separated sewage to move toward one end of the sewage discharge port.

[0007] Preferably, the end of the centrifugal sleeve close to the concentrate discharge port is a conical cylinder, and the end of the centrifugal sleeve close to the sewage discharge port is a straight cylinder; the end of the centrifugal sleeve close to the sewage discharge port is provided with a baffle sealing plate, and the metal discharge port is opened on the baffle sealing plate; the concentrate discharge port is provided at the conical top of the centrifugal sleeve, and the sewage discharge port is provided on the straight cylinder wall of the centrifugal sleeve.

[0008] Preferably, a feed bracket is provided on one side of the centrifugal sleeve close to the concentration discharge port, a feed pipe is set up inside the feed bracket, one end of the feed pipe passes through the concentration discharge port and extends into the interior of the centrifugal sleeve, and the other end of the feed pipe extends out of the protective shell and is connected to the sludge supply end.

[0009] Preferably, a driven pulley is provided on the outer side of one end of the centrifugal sleeve close to the concentration discharge port, and the centrifugal drive mechanism includes a centrifugal drive motor and a drive pulley; the centrifugal drive motor and the drive pulley are coaxially fixed, and the drive pulley and the driven pulley are connected for transmission via a transmission belt.

[0010] Preferably, the differential is fixed on a side of the feed bracket close to the centrifugal sleeve, and the differential includes an outer drive ring gear, an inner support ring gear and a plurality of driven gears; each of the driven gears is respectively engaged with the outer drive ring gear and the inner support ring gear, and the outer drive ring gear and the drive pulley are connected for transmission via a transmission belt.

[0011] Preferably, the screw conveyor includes several screw conveying rods, each of which includes a driven rod, and several screw conveying sections are arranged on the outside of the driven rod; each of the driven rods is coaxially fixed to each of the driven gears, and under the drive of the outer drive ring gear, each of the driven rods drives the corresponding screw conveying section to revolve around the axis of the centrifugal sleeve, while each of the screw conveying sections rotates around the corresponding driven rod.

[0012] Preferably, the diameter of the stirring range that can be covered by each of the spiral conveying rods during rotation is smaller than the lowest sludge water level inside the centrifugal sleeve; when the centrifugal sleeve is in a centrifugal state, the sludge is stratified into separated sewage and concentrated sludge under the action of centrifugation, and the concentrated sludge in the lower layer moves toward one end of the concentrated discharge port under the driving action of the spiral conveying rod during rotation, and the separated sewage in the upper layer moves toward one end of the sewage discharge port under the action of gravity.

[0013] Preferably, the buffer bracket is elastically connected to the outer wall of the mounting sleeve through a plurality of buffer cylinders and a plurality of suspension springs; the magnetic adsorption mechanism includes a magnetic connection shell, the magnetic connection shell is fixed to the inner wall of the mounting sleeve, and an electromagnet is arranged inside the magnetic connection shell.

[0014] Preferably, an inspection cabinet door is provided at one end of the centrifugal sleeve close to the sewage discharge port, and an exhaust hose is installed in the center of the inspection cabinet door. One end of the exhaust hose passes through the material blocking plate and extends into the interior of the centrifugal sleeve; the other end of the exhaust hose is connected to the exhaust fan through the adsorption box. Under the power provided by the exhaust fan, the gas desorbed from the sludge by centrifugal action can be discharged from the exhaust fan after being adsorbed by the adsorption box through the exhaust hose.

[0015] A method for treating incinerator slag, wherein the sludge generated by sorting the incinerator slag is subjected to metal filtration and dehydration treatment using the metal-containing sludge filtering equipment described above, comprising the following steps: Take out the slag from the incinerator, and subject it to magnetic separation and jigging operations to obtain the upper light material; After washing the upper light material with water, a sludge that is difficult to separate is obtained; The sludge is fed into the centrifugal sleeve. Under the action of the centrifugal drive mechanism, the centrifugal sleeve first operates in a stirring state. The magnetic adsorption mechanism generates magnetism, which gathers the ferromagnetic metal in the sludge to the end close to the magnetic adsorption mechanism, and the sludge rich in ferromagnetic metal is discharged from the metal discharge port. Then the centrifugal sleeve enters the centrifugal state, the sludge is layered under high speed, the screw conveyor drives the concentrated sludge to move to one end of the concentrated discharge port, and drives the separated sewage to move to one end of the sewage discharge port to dehydrate the sludge.

[0016] Compared with the prior art, the present invention provides a metal-containing sludge filtering device and a method for treating incinerator slag, which has the following beneficial effects: 1. This metal-containing sludge filtering equipment, in a stirring state, the magnetic adsorption mechanism is energized to generate magnetism, and the ferromagnetic metal in the sludge is gathered to one end close to the magnetic adsorption mechanism, and the part of the sludge rich in ferromagnetic metal is discharged from the metal discharge port through a pipeline, so that the ferromagnetic metal contained in the sludge can be enriched, and the sludge is prevented from contaminating the magnetic adsorption mechanism, while facilitating subsequent treatment and collection of the ferromagnetic metal. In the stirring state, the ferromagnetic metal can be filtered and collected, and the sludge dispersion can be ensured through the stirring process, so as to prevent the sludge from accumulating at the concentration discharge port and overflowing the centrifugal sleeve; in the centrifugal state, the sludge is separated into layers under high speed, and under the drive of the screw conveyor, the separated sewage in the upper layer moves to one end of the sewage discharge port to discharge the separated sewage, and the concentrated sludge is continuously accumulated at one end close to the concentration discharge port and discharged through the concentration discharge port due to the continuous drive of the screw conveyor, thereby effectively separating the concentrated sludge from the separated sewage.

[0017] 2. This metal-containing sludge filtering equipment is configured such that one end of the centrifugal sleeve near the concentration discharge port is a conical cylinder, and the other end of the centrifugal sleeve near the sewage discharge port is a straight cylinder. This can provide a larger sludge accommodation space to ensure the maximum sludge carrying capacity of the centrifugal sleeve. The metal discharge port is opened on the baffle plate, the concentration discharge port is arranged at the conical top of the centrifugal sleeve, and the sewage discharge port is arranged on the straight cylinder wall of the centrifugal sleeve. It can effectively adapt to the direction of the required products according to the stirring state and the centrifugal state, and is convenient for discharging each product separately. The setting of the feed pipe does not interfere with the rotation of the centrifugal sleeve and the screw conveyor, and can effectively ensure the metal filtration and sludge dewatering treatment process of the ferromagnetic metal sludge of the centrifugal sleeve.

[0018] 3. In this metal-containing sludge filtering equipment, each driven gear engages with the outer drive gear ring and the inner support gear ring respectively. Each driven gear drives the corresponding driven rod to drive the corresponding spiral conveying section to revolve around the axis of the centrifugal sleeve. At the same time, each spiral conveying section rotates around the corresponding driven rod, and the speed output by the centrifugal drive motor can be decelerated and output to each spiral conveying rod. Through the arrangement of each spiral conveying section, the sludge can be conveyed through the gap between adjacent spiral conveying sections while relaying, thereby avoiding excessive reaction force on each spiral conveying section and ensuring the service life of the spiral conveying section.

[0019] 4. This metal-containing sludge filtering equipment ensures the conveying efficiency of each spiral conveying section by tightly contacting the outer side surface of the spiral conveying section with the inner wall of the centrifugal sleeve. Since the diameter of the stirring range that can be covered by each spiral conveying rod during its rotation is smaller than the lowest sludge water level inside the centrifugal sleeve, the stirring range of each spiral conveying rod is below the liquid level of the separated sewage, thereby reducing interference with the upper sewage layer and more effectively applying the conveying force to the concentrated sludge below, thereby improving the separation effect of the separated sewage in the upper layer and the concentrated sludge in the lower layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a metal-containing sludge filtering device according to the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a metal-containing sludge filtering device without the protective shell of the present invention; Figure 3 This is a second schematic diagram of the three-dimensional structure of a metal-containing sludge filtering device according to the present invention without the protective shell; Figure 4 This is one of the internal structure diagrams of a metal-containing sludge filtering device of the present invention; Figure 5 This is the second schematic diagram of the internal structure of a metal-containing sludge filtering device according to the present invention; Figure 6 This is one of the driving structure schematic diagrams of the centrifugal sleeve and centrifugal drive mechanism of a metal-containing sludge filtering device of the present invention; Figure 7 This is a second schematic diagram of the driving structure of the centrifugal sleeve and centrifugal drive mechanism of a metal-containing sludge filtering device of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of a centrifugal sleeve and a screw conveyor of a metal-containing sludge filtering device of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of a screw conveyor of a metal-containing sludge filtering device of the present invention.

[0021] In the figure: 1. Protective shell; 11. Mounting bracket; 12. Buffer bracket; 121. Buffer cylinder; 122. Hanging spring; 13. Feed bracket; 14. Feed pipe; 2. Mounting sleeve; 3. Centrifugal sleeve; 31. Concentrate discharge port; 32. Sewage discharge port; 33. Metal discharge port; 34. Material blocking plate; 35. Driven pulley; 4. Centrifugal drive mechanism; 41. Centrifugal drive motor; 42. Drive pulley; 5. Magnetic adsorption mechanism; 51. Magnetic connection shell; 6. Screw conveyor; 61. Differential; 611. Outer drive ring gear; 612. Inner support ring gear; 613. Driven gear; 62. Screw conveyor rod; 621. Driven rod; 622. Screw conveyor section; 7. Inspection cabinet door; 71. Exhaust hose; 72. Adsorption box; 73. Exhaust fan. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] As introduced in the background technology, there are deficiencies in the existing technology. In order to solve the above technical problems, this application proposes a metal-containing sludge filtering device and a treatment method for incinerator slag.

[0024] Example 1: Please refer to Figures 1-9A metal-containing sludge filtering device comprises a protective shell 1, a mounting bracket 11 is provided inside the protective shell 1, a buffer bracket 12 is provided on the top of the mounting bracket 11, a mounting sleeve 2 is provided inside the buffer bracket 12, and a centrifugal sleeve 3 is sleeved inside the mounting sleeve 2; a centrifugal driving mechanism 4 is provided on the top of the buffer bracket 12, and under the drive of the centrifugal sleeve 3, the centrifugal sleeve 3 can rotate at two speeds, namely, a stirring state and a centrifugal state; a concentration discharge port 31 and a sewage discharge port 32 are respectively provided at both ends of the centrifugal sleeve 3, a magnetic adsorption mechanism 5 is provided on the outer side of the centrifugal sleeve 3 and at one end close to the sewage discharge port 32, and a metal discharge port 33 is also provided on the end of the centrifugal sleeve 3 close to the sewage discharge port 32; the centrifugal sleeve 3 is also provided with a screw conveyor 6, which is power-connected to the centrifugal drive mechanism 4 through a differential 61. When the centrifugal sleeve 3 is in a stirring state, the centrifugal sleeve 3 performs a reciprocating low-speed motion, and the magnetic adsorption mechanism 5 generates magnetism, which collects the ferromagnetic metal in the sludge toward the end close to the magnetic adsorption mechanism 5, and can discharge the sludge rich in ferromagnetic metal from the metal discharge port 33. When the centrifugal sleeve 3 is in a centrifugal state, the centrifugal sleeve 3 rotates at high speed, and the screw conveyor 6 moves in the same direction at a speed lower than that of the centrifugal sleeve 3. The sludge is separated at high speed, and the screw conveyor 6 drives the concentrated sludge to move toward the concentrated discharge port 31 and drives the separated sewage to move toward the sewage discharge port 32.

[0025] When in use, first, a set amount of sludge that needs to be filtered and separated is injected into the centrifugal sleeve 3. In particular, this metal-containing sludge filtering equipment is suitable for metal filtration and sludge dewatering treatment of ferromagnetic metal sludge. This metal-containing sludge filtering equipment is divided into a stirring state and a centrifugal state according to the operating conditions of the centrifugal sleeve 3 (different speed ranges) (the speed of the centrifugal sleeve 3 in the stirring state is not higher than 30 rad / min, and the speed of the centrifugal sleeve 3 in the centrifugal state is not lower than 240 rad / min); in the stirring state, the centrifugal sleeve 3 performs a reciprocating low-speed motion (the total rotation speed of the reciprocating cycle is not higher than 30 rad / min), and the magnetic adsorption mechanism 5 is energized to generate magnetism, and the ferromagnetic metal in the sludge is gathered to one end close to the magnetic adsorption mechanism 5. After the centrifugal sleeve 3 completes the reciprocating low-speed motion, the butterfly valve provided at the metal discharge port 33 can be opened, and part of the sludge rich in ferromagnetic metal is discharged from the metal discharge port 33 through a pipeline, so that the iron contained in the sludge can be removed. The magnetic metal is enriched, which is convenient for the later treatment and collection of ferromagnetic metal. In the stirring state, the ferromagnetic metal can be filtered and collected. At the same time, the stirring process can ensure the dispersion of the sludge and prevent the sludge from accumulating at the concentration discharge port 31 and overflowing the centrifugal sleeve 3; in the centrifugal state, the centrifugal sleeve 3 is centrifugally rotated at high speed, and the screw conveyor 6 moves in the same direction at a speed lower than that of the centrifugal sleeve 3. The sludge is layered under the action of the high speed. Driven by the screw conveyor 6, the concentrated sludge in the lower layer moves toward one end of the concentration discharge port 31. Due to the lack of material in a section near the sewage discharge port 32, the separated sewage in the upper layer moves toward one end of the sewage discharge port 32 under the action of gravity, so that the separated sewage can be discharged through the butterfly valve provided at the sewage discharge port 32. And through the continuous driving of the screw conveyor 6, the concentrated sludge is continuously accumulated at one end near the concentration discharge port 31 and discharged over the concentration discharge port 31, thereby effectively separating the concentrated sludge and the separated sewage.

[0026] Example 2: Please refer to Figures 1-9 The difference from the above embodiment is that the end of the centrifugal sleeve 3 close to the concentrate discharge port 31 is a conical cylinder, and the end of the centrifugal sleeve 3 close to the sewage discharge port 32 is a straight cylinder; the end of the centrifugal sleeve 3 close to the sewage discharge port 32 is provided with a material blocking sealing plate 34, and the metal discharge port 33 is opened on the material blocking sealing plate 34; the concentrate discharge port 31 is arranged at the conical top of the centrifugal sleeve 3, and the sewage discharge port 32 is arranged on the straight cylinder wall of the centrifugal sleeve 3.

[0027] A feed bracket 13 is provided on one side of the centrifugal sleeve 3 near the concentration discharge port 31, and a feed pipe 14 is set up inside the feed bracket 13. One end of the feed pipe 14 passes through the concentration discharge port 31 and extends into the centrifugal sleeve 3, and the other end of the feed pipe 14 extends out of the protective shell 1 and is connected to the sludge supply end.

[0028] A driven pulley 35 is provided on the outer side of one end of the centrifugal sleeve 3 near the concentration discharge port 31, and the centrifugal drive mechanism 4 includes a centrifugal drive motor 41 and a drive pulley 42; the centrifugal drive motor 41 and the drive pulley 42 are coaxially fixed, and the drive pulley 42 and the driven pulley 35 are connected for transmission via a transmission belt.

[0029] During specific use, the centrifugal sleeve 3 is provided with a conical cylinder at one end close to the concentration discharge port 31, and a straight cylinder at one end close to the sewage discharge port 32, so as to provide a larger accommodating space for the sludge, thereby ensuring the maximum sludge carrying capacity of the centrifugal sleeve 3, and the metal discharge port 33 is opened on the baffle plate 34, the concentration discharge port 31 is provided at the conical top of the centrifugal sleeve 3, and the sewage discharge port 32 is provided on the straight cylinder wall of the centrifugal sleeve 3, and can effectively adapt to the direction of the required products (sludge rich in ferromagnetic metals, separated sewage, concentrated sludge) according to the stirring state and the centrifugal state, so as to facilitate the discharge of each product separately, through the feed pipe The channel 14 is mounted on the feed bracket 13, and after the treatment of the previous batch of sludge is completed, the next batch of sludge to be treated can be injected into the centrifugal sleeve 3 through the feed pipe 14, and the setting of the feed pipe 14 does not interfere with the rotation of the centrifugal sleeve 3 and the screw conveyor 6, and can effectively ensure the metal filtration and sludge dewatering treatment process of the ferromagnetic metal sludge of the centrifugal sleeve 3. The centrifugal sleeve 3 is connected and driven by a transmission belt between the driving pulley 42 and the driven pulley 35, and the centrifugal sleeve 3 can be controlled by the frequency conversion output of the centrifugal drive motor 41 to be in a stirring state and a centrifugal state, respectively, to perform the metal filtration and sludge dewatering treatment process of the ferromagnetic metal sludge, respectively.

[0030] Example 3: Please refer to Figures 1-9 The difference from the above embodiment is that the differential 61 is fixed to the side of the feed bracket 13 close to the centrifugal sleeve 3, and the differential 61 includes an outer drive ring gear 611, an inner support ring gear 612 and a plurality of driven gears 613; each driven gear 613 is respectively engaged with the outer drive ring gear 611 and the inner support ring gear 612, and the outer drive ring gear 611 is connected to the drive pulley 42 through a transmission belt.

[0031] The screw conveyor 6 includes several screw conveying rods 62, each of which includes a driven rod 621, and several screw conveying sections 622 are arranged on the outside of the driven rod 621; each driven rod 621 is coaxially fixed to each driven gear 613, and under the drive of the external drive ring gear 611, each driven rod 621 drives the corresponding screw conveying section 622 to revolve around the axis of the centrifugal sleeve 3, while each screw conveying section 622 rotates around the corresponding driven rod 621.

[0032] The diameter of the stirring range that can be covered by each spiral conveying rod 62 during rotation is smaller than the lowest sludge water level inside the centrifugal sleeve 3; when the centrifugal sleeve 3 is in a centrifugal state, the sludge is stratified into separated sewage and concentrated sludge under the action of centrifugation, and the concentrated sludge in the lower layer is driven by the rotation of the spiral conveying rod 62 to move toward the concentrated discharge port 31, and the separated sewage in the upper layer moves toward the sewage discharge port 32 under the action of gravity.

[0033] Specifically, the outer side surface of the spiral conveying section 622 is in close contact with the inner wall of the centrifugal sleeve 3. Through the setting of the differential 61, the transmission is connected between the outer drive ring gear 611 and the drive pulley 42 through a transmission belt, so that each driven gear 613 is meshed with the outer drive ring gear 611 and the inner support ring gear 612 respectively. Each driven gear 613 drives the corresponding driven rod 621 to drive the corresponding spiral conveying section 622 to revolve around the axis of the centrifugal sleeve 3. At the same time, each spiral conveying section 622 rotates around the corresponding driven rod 621; through the meshing action between the driven gear 613 and the outer drive ring gear 611 and the inner support ring gear 612 respectively, the speed output by the centrifugal drive motor 41 can be decelerated and output to each spiral conveying rod 62, so that through each spiral conveying The setting of the section 622 can convey the sludge in relay mode while passing through the gaps between adjacent spiral conveying sections 622, thereby avoiding excessive reaction force on each spiral conveying section 622 and ensuring the service life of the spiral conveying section 622. It can also ensure the conveying efficiency of each spiral conveying section by making the outer side surface of the spiral conveying section 622 close to the inner wall of the centrifugal sleeve 3. Since the diameter of the stirring range that can be covered by each spiral conveying rod 62 during rotation is smaller than the lowest sludge water level inside the centrifugal sleeve 3, the stirring range of each spiral conveying rod 62 is below the liquid level of the separated sewage, thereby reducing the interference with the upper sewage and more effectively applying the conveying force to the concentrated sludge below, thereby improving the separation effect of the separated sewage in the upper layer and the concentrated sludge in the lower layer.

[0034] Example 4: Please refer to Figures 1-9 The difference from the above embodiment is that the buffer bracket 12 is elastically connected to the outer wall of the mounting sleeve 2 through a plurality of buffer cylinders 121 and a plurality of suspension springs 122; the magnetic adsorption mechanism 5 includes a magnetic connection shell 51, which is fixed to the inner wall of the mounting sleeve 2, and an electromagnet is arranged inside the magnetic connection shell 51.

[0035] An inspection cabinet door 7 is provided at one end of the centrifugal sleeve 3 near the sewage discharge port 32, and an exhaust hose 71 is installed in the center of the inspection cabinet door 7. One end of the exhaust hose 71 passes through the material blocking plate 34 and extends into the interior of the centrifugal sleeve 3; the other end of the exhaust hose 71 is connected to the exhaust fan 73 through the adsorption box 72. Under the power provided by the exhaust fan 73, the gas desorbed from the sludge by centrifugal action can be discharged from the exhaust fan 73 after being adsorbed by the adsorption box 72 through the exhaust hose 71.

[0036] During use, the buffer bracket 12 is elastically connected to the outer wall of the mounting sleeve 2 by means of a plurality of buffer cylinders 121 and a plurality of suspension springs 122, which can ensure the stability of the centrifugal sleeve 3 during high-speed centrifugal rotation while preventing the vibration caused by the high-speed rotation from being transmitted to the outside of the protective shell 1. Through the arrangement of the electromagnet inside the magnetic connection shell 51, the magnetic connection shell 51 does not interfere with the rotation process of the centrifugal sleeve 3. While ensuring the adsorption effect of the magnetic connection shell 51 on the ferromagnetic metal in the sludge inside the centrifugal sleeve 3, the sludge is prevented from polluting the magnetic connection shell 51 and the electromagnet. Through the arrangement of the exhaust fan 73, the gas desorbed from the sludge by centrifugal action can be discharged from the exhaust fan 73 after being adsorbed by the adsorption box 72 through the exhaust hose 71, and the gas in the sludge can be adsorbed and then discharged, thereby avoiding gas pollution to the external environment.

[0037] Example 5: A method for treating incinerator slag, wherein the sludge generated by sorting the incinerator slag is subjected to metal filtration and dehydration treatment using a metal-containing sludge filtration device as described in any one of Examples 1 to 4, comprising the following steps: Take out the slag from the incinerator, and subject it to magnetic separation and jigging operations to obtain the upper light material; After washing the upper light material with water, a sludge that is difficult to separate is obtained; The sludge is fed into the centrifugal sleeve 3. Under the action of the centrifugal drive mechanism 4, the centrifugal sleeve 3 first operates in a stirring state. The magnetic adsorption mechanism 5 generates magnetism, which collects the ferromagnetic metals in the sludge toward the end close to the magnetic adsorption mechanism 5. The sludge rich in ferromagnetic metals is discharged from the metal discharge port 33. Then the centrifugal sleeve 3 enters the centrifugal state, the sludge is layered under high speed, the screw conveyor 6 drives the concentrated sludge to move to the concentration discharge port 31, and drives the separated sewage to move to the sewage discharge port 32 to dehydrate the sludge.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A metal-containing sludge filtering device, comprising a protective housing, a mounting bracket disposed inside the protective housing, and a buffer bracket disposed on the top of the mounting bracket, characterized in that: The buffer bracket is provided with a mounting sleeve inside, and the mounting sleeve is sleeved with a centrifugal sleeve inside; A centrifugal drive mechanism is provided at the top of the buffer bracket. Driven by the centrifugal sleeve, the centrifugal sleeve can rotate at two speeds: a stirring state and a centrifugal state. The two ends of the centrifugal sleeve are respectively provided with a concentrate discharge port and a sewage discharge port. A magnetic adsorption mechanism is provided on the outer side of the centrifugal sleeve and on one end close to the sewage discharge port. A metal discharge port is also provided on the end of the centrifugal sleeve close to the sewage discharge port. A screw conveyor is also provided inside the centrifugal sleeve, and the screw conveyor is power-connected to the centrifugal drive mechanism via a differential; When the centrifugal sleeve is in a stirring state, the centrifugal sleeve performs a reciprocating low-speed motion, and the magnetic adsorption mechanism generates magnetism, which gathers the ferromagnetic metals in the sludge toward one end close to the magnetic adsorption mechanism, and can discharge part of the sludge rich in ferromagnetic metals from the metal discharge port; When the centrifugal sleeve is in a centrifugal state, the centrifugal sleeve rotates centrifugally at high speed, and the screw conveyor moves in the same direction at a speed lower than that of the centrifugal sleeve. The sludge is stratified under the action of high speed, and the screw conveyor drives the concentrated sludge to move toward one end of the concentrated discharge port, and drives the separated sewage to move toward one end of the sewage discharge port.

2. The metal-containing sludge filtering equipment according to claim 1, characterized in that: The end of the centrifugal sleeve close to the concentrate discharge port is a conical cylinder, and the end of the centrifugal sleeve close to the sewage discharge port is a straight cylinder; The centrifugal sleeve is provided with a material blocking sealing plate at one end close to the sewage discharge port, and the metal discharge port is opened on the material blocking sealing plate; The concentrate discharge port is arranged on the conical top of the centrifugal sleeve, and the sewage discharge port is arranged on the straight cylinder wall of the centrifugal sleeve.

3. The metal-containing sludge filtering equipment according to claim 2, characterized in that: A feed bracket is provided on one side of the centrifugal sleeve close to the concentration discharge port, and a feed pipe is set up inside the feed bracket. One end of the feed pipe passes through the concentration discharge port and extends into the interior of the centrifugal sleeve, and the other end of the feed pipe extends out of the protective shell and is connected to the sludge supply end.

4. The metal-containing sludge filtering equipment according to claim 3, characterized in that: A driven pulley is provided on the outer side of one end of the centrifugal sleeve close to the concentrated material discharge port, and the centrifugal drive mechanism includes a centrifugal drive motor and a drive pulley; The centrifugal drive motor and the driving pulley are coaxially fixed, and the driving pulley and the driven pulley are connected for transmission via a transmission belt.

5. The metal-containing sludge filtering equipment according to claim 4, characterized in that: The differential is fixed on a side of the feed bracket close to the centrifugal sleeve, and the differential includes an outer driving gear ring, an inner supporting gear ring and a plurality of driven gears; Each of the driven gears is respectively engaged with the outer drive ring gear and the inner support ring gear, and the outer drive ring gear and the drive pulley are connected for transmission via a transmission belt.

6. The metal-containing sludge filtering equipment according to claim 5, characterized in that: The screw conveyor includes a plurality of screw conveying rods, each of which includes a driven rod, and a plurality of screw conveying sections are arranged on the outer side of the driven rod; Each of the driven rods is coaxially fixed to each of the driven gears. Driven by the outer drive gear ring, each of the driven rods drives the corresponding spiral conveying sections to revolve around the axis of the centrifugal sleeve, while each of the spiral conveying sections rotates around the corresponding driven rod.

7. The metal-containing sludge filtering equipment according to claim 6, characterized in that: The diameter of the stirring range that can be covered by each of the spiral conveying rods during rotation is smaller than the lowest sludge water level inside the centrifugal sleeve; When the centrifugal sleeve is in a centrifugal state, the sludge is separated into separated sewage and concentrated sludge under the action of centrifugation. The concentrated sludge in the lower layer is driven by the rotation of the spiral conveying rod and moves toward one end of the concentrated discharge port. The separated sewage in the upper layer moves toward one end of the sewage discharge port under the action of gravity.

8. The metal-containing sludge filtering equipment according to claim 1, characterized in that: The buffer bracket is elastically connected to the outer wall of the mounting sleeve via a plurality of buffer cylinders and a plurality of hanging springs; The magnetic adsorption mechanism includes a magnetic connection shell, the magnetic connection shell is fixed to the inner wall of the mounting sleeve, and an electromagnet is arranged inside the magnetic connection shell.

9. The metal-containing sludge filtering equipment according to claim 2, characterized in that: An inspection door is provided at one end of the centrifugal sleeve close to the sewage discharge port, an exhaust hose is installed in the center of the inspection door, and one end of the exhaust hose passes through the material blocking plate and extends into the interior of the centrifugal sleeve; The other end of the exhaust hose is connected to the exhaust fan through the adsorption box. Under the power provided by the exhaust fan, the gas desorbed from the sludge by centrifugal action can be discharged from the exhaust fan after being adsorbed by the adsorption box through the exhaust hose.

10. A method for treating incinerator slag, characterized in that: The sludge generated by sorting the incinerator slag is subjected to metal filtration and dehydration treatment using a metal-containing sludge filtering device as claimed in any one of claims 1 to 9, comprising the following steps: Take out the slag from the incinerator, and subject it to magnetic separation and jigging operations to obtain the upper light material; After washing the upper light material with water, a sludge that is difficult to separate is obtained; The sludge is fed into the centrifugal sleeve. Under the action of the centrifugal drive mechanism, the centrifugal sleeve first operates in a stirring state. The magnetic adsorption mechanism generates magnetism, which gathers the ferromagnetic metal in the sludge to the end close to the magnetic adsorption mechanism, and the sludge rich in ferromagnetic metal is discharged from the metal discharge port. Then the centrifugal sleeve enters the centrifugal state, the sludge is layered under high speed, the screw conveyor drives the concentrated sludge to move to one end of the concentrated discharge port, and drives the separated sewage to move to one end of the sewage discharge port to dehydrate the sludge.

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