A metal-containing sludge filtration apparatus and a method for processing of incinerator slag

Abstract

The present application relates to sludge treatment technical field, disclose a kind of metal-containing sludge filtering equipment and processing method for incinerator slag.The present application is under the condition of stirring, magnetism is generated by energizing magnetic adsorption mechanism, and the ferromagnetic metal in sludge is gathered to one end close to magnetic adsorption mechanism, and the part sludge rich in ferromagnetic metal is discharged from metal discharge port through pipeline, to be able to enrich the ferromagnetic metal contained in sludge, and the ferromagnetic metal is collected, through the process of stirring, guarantee the dispersion degree of sludge, avoid sludge to overflow centrifugal sleeve and accumulate in concentration discharge port;Under the condition of centrifugation, sludge is layered under the action of high speed, under the drive of screw conveyor, separated sewage moves to sewage discharge port one end and discharges separated sewage, and concentrated sludge is accumulated in one end close to concentration discharge port and discharged over concentration discharge port, and concentrated sludge and separated sewage can be effectively separated.

Description

TECHNICAL FIELD

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

[0002] Traditional sludge treatment methods mainly include landfill, solidification and stabilization, and chemical precipitation, etc., but these methods often cannot efficiently separate metal components, resulting in the loss of metal resources. Among them, early sludge filtering devices mainly use mechanical pressure filtration, centrifugal separation or chemical reagent assisted precipitation, but these technologies have low capture efficiency for metal particles, especially ferromagnetic metals, which often exist in the form of fine particles or oxides in sludge, and traditional filtration methods are difficult to achieve high-purity separation.

[0003] With the rapid development of industrialization and urbanization, as an important facility for waste treatment and energy recovery, the incinerator produces slag and sludge containing a large amount of metal components, especially ferromagnetic metals (such as iron, nickel, cobalt, etc.). If these metals are not effectively recovered, not only will it cause resource waste, but also may cause secondary pollution to the environment due to heavy metal leakage. Recovering ferromagnetic metals from incinerator slag sludge has significant economic, environmental and resource sustainability value. The ferromagnetic metals recovered from sludge can be directly used in the steel smelting or casting industry, reducing the dependence on primary ores.

[0004] At present, in the process of treating sludge containing magnetic metals, the magnetic separation technology uses permanent magnets or electromagnetic devices to adsorb and separate ferromagnetic metals, significantly improving the metal recovery rate. However, the existing equipment needs to extract magnetic metals from sludge with high viscosity, and the magnetic metals are difficult to be directly extracted from the sludge, which may contaminate the magnetic separation equipment. Long-term magnetic separation process with sludge contamination of the magnetic separation equipment significantly reduces the magnetic attraction effect of the magnetic separation equipment. SUMMARY

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

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] The application discloses a metal-containing sludge filtering device, which comprises a protective shell, an installation support arranged in the protective shell, a buffer support arranged at the top of the installation support, an installation sleeve arranged in the buffer support, and a centrifugal sleeve arranged in the installation sleeve.

[0008] Preferably, the end of the centrifugal sleeve close to the concentrated discharge port is a conical cylinder, and the end of the centrifugal sleeve close to the sewage discharge port is a straight cylinder; a material blocking sealing plate is arranged at the end of the centrifugal sleeve close to the sewage discharge port, and the metal discharge port is arranged on the material blocking sealing plate; the concentrated discharge port is arranged at the conical top of the centrifugal sleeve, and the sewage discharge port is arranged at the straight cylinder wall of the centrifugal sleeve.

[0009] Preferably, a feeding support is arranged at the side of the centrifugal sleeve close to the concentrated discharge port, a feeding pipeline is arranged in the feeding support, one end of the feeding pipeline penetrates through the concentrated discharge port and extends into the centrifugal sleeve, and the other end of the feeding pipeline extends out of the protective shell and is connected with a sludge supply end.

[0010] Preferably, a driven belt pulley is arranged at the outside of the end of the centrifugal sleeve close to the concentrated discharge port, the centrifugal driving mechanism comprises a centrifugal driving motor and a driving belt pulley, the centrifugal driving motor is coaxially fixed with the driving belt pulley, and the driving belt pulley is connected with the driven belt pulley through a transmission belt.

[0011] Preferably, the differential gear is fixed on one side of the feeding support near the centrifugal sleeve, the differential gear comprises an outer driving gear ring, an inner supporting gear ring and a plurality of driven gears, each of the driven gears is engaged between the outer driving gear ring and the inner supporting gear ring, and the outer driving gear ring is connected with the driving pulley through a transmission belt.

[0012] Preferably, the screw conveyor comprises a plurality of screw conveying rods, each of the screw conveying rods comprises a driven rod, and a plurality of screw conveying segments are arranged outside the driven rod, each of the driven rods is coaxially fixed with each of the driven gears, and under the driving of the outer driving gear ring, each of the driven rods drives the corresponding screw conveying segment to revolve around the axis of the centrifugal sleeve, while each of the screw conveying segments revolves around the corresponding driven rod.

[0013] Preferably, the diameter of the stirring range covered by each of the screw conveying rods during the revolving process is smaller than the lowest sludge water level in the centrifugal sleeve, when the centrifugal sleeve is in a centrifugal state, the sludge is stratified into separated sewage and concentrated sludge under the centrifugal action, the concentrated sludge in the lower layer moves to one end of the concentrated discharge port under the driving action in the revolving process of the screw conveying rod, and the separated sewage in the upper layer moves to one end of the sewage discharge port under the action of gravity.

[0014] Preferably, the buffer support and the outer wall of the mounting sleeve are elastically connected through a plurality of buffer cylinders and a plurality of lifting springs, the magnetic adsorption mechanism comprises a magnetic connection shell, the magnetic connection shell is fixed on the inner wall of the mounting sleeve, and an electromagnet is arranged in the magnetic connection shell.

[0015] Preferably, the centrifugal sleeve is provided with an inspection cabinet door at one end near the sewage discharge port, an exhaust hose is arranged at the center of the inspection cabinet door, one end of the exhaust hose penetrates the material blocking sealing plate and extends into the inside of the centrifugal sleeve, and the other end of the exhaust hose is communicated between an adsorption box and an exhaust fan, so that the gas separated from the sludge under the centrifugal action can be adsorbed by the adsorption box and discharged from the exhaust fan under the power provided by the exhaust fan.

[0016] A processing method for incinerator slag, the sludge generated by the incinerator slag after sorting is subjected to metal filtration and dewatering treatment by using the above-mentioned metal-containing sludge filtration equipment, and the method comprises the following steps:

[0017] The incinerator slag is taken out, the upper light material is obtained after the slag is subjected to magnetic separation and jigging operation;

[0018] After the upper light material is washed with water, the sludge which is difficult to separate is obtained;

[0019] The sludge is input into the centrifugal sleeve, the centrifugal sleeve is driven by the centrifugal driving mechanism, and the centrifugal sleeve is first operated in a stirring state, the magnetic adsorption mechanism generates magnetism, the ferromagnetic metal in the sludge is collected to one end close to the magnetic adsorption mechanism, and the sludge rich in the ferromagnetic metal is discharged from the metal discharge port;

[0020] Then the centrifugal sleeve enters a centrifugal state, the sludge is stratified under the action of high speed, the spiral conveyor drives the concentrated sludge to move to one end of the concentration discharge port, and drives the separated sewage to move to one end of the sewage discharge port, so that the sludge is dewatered.

[0021] Compared with the prior art, the sludge containing metal filtering equipment and the treatment method for the slag of the incinerator have the following beneficial effects:

[0022] 1. The sludge containing metal filtering equipment, in the stirring state, the magnetic adsorption mechanism generates magnetism by power supply, the ferromagnetic metal in the sludge is collected to one end close to the magnetic adsorption mechanism, and the sludge rich in the ferromagnetic metal is discharged from the metal discharge port through the pipeline, so that the ferromagnetic metal contained in the sludge can be enriched, the sludge can be prevented from polluting the magnetic adsorption mechanism, and the sludge can be conveniently treated and collected in the later period. In the stirring state, the ferromagnetic metal can be filtered and collected, the dispersion degree of the sludge can be ensured through the stirring process, the sludge can be prevented from overflowing out of the centrifugal sleeve due to accumulation at the concentration discharge port, in the centrifugal state, the sludge is stratified under the action of high speed, and under the driving of the spiral conveyor, the separated sewage at the upper layer moves to one end of the sewage discharge port and is discharged, and the concentrated sludge is continuously accumulated at one end close to the concentration discharge port and discharged over the concentration discharge port through the continuous driving of the spiral conveyor, so that the concentrated sludge and the separated sewage can be effectively separated.

[0023] 2. The sludge containing metal filtering equipment, the end of the centrifugal sleeve close to the concentration discharge port is a conical cylinder, and the end of the centrifugal sleeve close to the sewage discharge port is a straight cylinder, which can provide a larger accommodation space for the sludge, ensure the maximum sludge carrying capacity of the centrifugal sleeve, and enable the metal discharge port to be arranged on the material blocking sealing plate, the concentration discharge port to be arranged at the conical top of the centrifugal sleeve, and the sewage discharge port to be arranged at the straight cylinder wall of the centrifugal sleeve, so that the products can be effectively adapted according to the stirring state and the centrifugal state, the products can be conveniently discharged, and the rotation of the centrifugal sleeve and the spiral conveyor is not disturbed, so that the metal filtering of the sludge containing ferromagnetic metal and the dewatering treatment process of the sludge can be effectively ensured.

[0024] 3. The metal-containing sludge filtering device, each driven gear drives corresponding each driven rod to drive corresponding each spiral conveying section to revolve around the centrifugal sleeve axis through the meshing action between the outer driving gear ring and the inner supporting gear ring, and each spiral conveying section revolves around the corresponding driven rod, so that the rotation speed output by the centrifugal driving motor is decelerated and output to each spiral conveying rod, so that through the arrangement of each spiral conveying section, the sludge can be relayed and conveyed, and the gap between adjacent spiral conveying sections can avoid excessive reaction force on each spiral conveying section to ensure the service life of the spiral conveying section.

[0025] 4. The metal-containing sludge filtering device, the outer side surface of the spiral conveying section is tightly attached to the inner wall of the centrifugal sleeve, so as to ensure the conveying efficiency of each spiral conveying section, and since the stirring range covered by each spiral conveying rod during the revolving process is smaller in diameter than the lowest sludge level in the centrifugal sleeve, the stirring range of each spiral conveying rod is below the separated sewage liquid level, so as to reduce the interference with the upper layer of sewage, and the conveying force can be more effectively applied to the concentrated sludge below, so as to improve the separation effect of the separated sewage in the upper layer and the concentrated sludge in the lower layer. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0027] Figure 2 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0028] Figure 3 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0029] Figure 4 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0030] Figure 5 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0031] Figure 6 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0032] Figure 7 It is a three-dimensional structure schematic view of the metal-containing sludge filtering device of the present application;

[0033] Figure 8Figure 1 is a perspective view of a centrifugal sleeve and a screw conveyor of a metal-containing sludge filtering device according to the present application;

[0034] Figure 9 Figure 2 is a perspective view of a screw conveyor of a metal-containing sludge filtering device according to the present application.

[0035] In the figure: 1, protective shell; 11, mounting bracket; 12, buffer bracket; 121, buffer cylinder; 122, suspension spring; 13, feeding bracket; 14, feeding pipeline; 2, mounting sleeve; 3, centrifugal sleeve; 31, thickened discharge port; 32, sewage discharge port; 33, metal discharge port; 34, material blocking cover plate; 35, driven pulley; 4, centrifugal driving mechanism; 41, centrifugal driving motor; 42, driving pulley; 5, magnetic adsorption mechanism; 51, magnetic connection shell; 6, screw conveyor; 61, differential mechanism; 611, outer driving gear ring; 612, inner support gear ring; 613, driven gear; 62, screw conveying rod; 621, driven rod; 622, screw conveying section; 7, maintenance cabinet door; 71, exhaust hose; 72, adsorption box; 73, exhaust fan. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] As introduced in the background, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a metal-containing sludge filtering device and a method for treating slag of an incinerator.

[0038] Embodiment one: please refer to Figures 1-9The application discloses a metal-containing sludge filtering device, which comprises a protective shell 1, an installation support 11 arranged in the protective shell 1, a buffer support 12 arranged at the top of the installation support 11, an installation sleeve 2 arranged in the buffer support 12, a centrifugal sleeve 3 arranged in the installation sleeve 2 in a sleeving mode, a centrifugal driving mechanism 4 arranged at the top of the buffer support 12, the centrifugal sleeve 3 being capable of rotating at two speeds of a stirring state and a centrifugal state under the driving of the centrifugal driving mechanism 4, a concentrated discharge port 31 and a sewage discharge port 32 being respectively arranged at two ends of the centrifugal sleeve 3, a magnetic adsorption mechanism 5 being arranged at one end of the centrifugal sleeve 3 and close to the sewage discharge port 32, a metal discharge port 33 being further arranged at the one end of the centrifugal sleeve 3 close to the sewage discharge port 32, a spiral conveyor 6 being further arranged in the centrifugal sleeve 3, the spiral conveyor 6 being connected with the centrifugal driving mechanism 4 through a differential mechanism 61, the centrifugal sleeve 3 being capable of reciprocating and circulating at a low speed when the centrifugal sleeve 3 is in the stirring state, the magnetic adsorption mechanism 5 generating magnetism, gathering ferromagnetic metals in sludge to the one end close to the magnetic adsorption mechanism 5, and discharging the sludge rich in the ferromagnetic metals from the metal discharge port 33, the centrifugal sleeve 3 being capable of high-speed centrifugal rotation when the centrifugal sleeve 3 is in the centrifugal state, the spiral conveyor 6 being capable of moving at a speed lower than that of the centrifugal sleeve 3 in the same direction, the sludge being stratified under the high-speed action, the spiral conveyor 6 driving the concentrated sludge to move to the one end of the concentrated discharge port 31, and driving the separated sewage to move to the one end of the sewage discharge port 32.

[0039] In use, first, a set amount of sludge to be filtered and separated is injected into the centrifugal sleeve 3, and the sludge containing metal filtering device is particularly suitable for metal filtering and sludge dewatering treatment of sludge containing ferromagnetic metal. The sludge containing metal filtering device is divided into a stirring state and a centrifugal state according to the operation of the centrifugal sleeve 3 (different speed intervals). In the stirring state, the centrifugal sleeve 3 moves at a low speed in a reciprocating cycle (the total rotation speed of the reciprocating cycle is not higher than 30 rad / min), the magnetic adsorption mechanism 5 is powered to generate magnetism, the ferromagnetic metal in the sludge is collected to one end close to the magnetic adsorption mechanism 5, and after the reciprocating low-speed movement of the centrifugal sleeve 3 is completed, the butterfly valve provided at the metal discharge port 33 can be opened, and the sludge rich in ferromagnetic metal is discharged from the metal discharge port 33 through the pipeline, so that the ferromagnetic metal contained in the sludge can be enriched, and the ferromagnetic metal can be collected in the later stage. In the stirring state, the ferromagnetic metal can be filtered and collected, and at the same time, through the stirring process, the dispersion degree of the sludge can be ensured, and the sludge is prevented from overflowing out of the centrifugal sleeve 3 due to accumulation at the thickening discharge port 31. In the centrifugal state, the centrifugal sleeve 3 rotates at a high speed, and the screw conveyor 6 moves at a speed lower than that of the centrifugal sleeve 3 in the same direction. Under the action of the high speed, the sludge is stratified, and under the driving of the screw conveyor 6, the thickened sludge at the lower layer moves to one end of the thickening discharge port 31. Due to the absence of material near the sewage discharge port 32, the separated sewage at the upper layer moves to 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 the thickened sludge can be continuously accumulated at one end close to the thickening discharge port 31 and discharged over the thickening discharge port 31 through the continuous driving of the screw conveyor 6, so that the thickened sludge and the separated sewage can be effectively separated.

[0040] Example two: please refer to Figures 1-9 The difference between the above-mentioned embodiment and the present embodiment is that the end of the centrifugal sleeve 3 close to the thickening 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 centrifugal sleeve 3 is provided with a material blocking cover plate 34 at the end close to the sewage discharge port 32, and the metal discharge port 33 is provided on the material blocking cover plate 34. The thickening discharge port 31 is provided at the conical top of the centrifugal sleeve 3, and the sewage discharge port 32 is provided at the straight cylinder wall of the centrifugal sleeve 3.

[0041] The centrifugal sleeve 3 is provided with a feeding support 13 at the side close to the thickening discharge port 31, and the feeding support 13 is provided with a feeding pipeline 14 inside. One end of the feeding pipeline 14 penetrates the thickening discharge port 31 and extends into the centrifugal sleeve 3, and the other end of the feeding pipeline 14 extends out of the protective shell 1 and is connected to the sludge supply end.

[0042] The centrifugal sleeve 3 is provided with a driven pulley 35 outside the end close to the thickening discharge port 31, and the centrifugal driving mechanism 4 includes a centrifugal driving motor 41 and a driving pulley 42; the centrifugal driving motor 41 is coaxially fixed with the driving pulley 42, and the driving pulley 42 is connected with the driven pulley 35 through a transmission belt.

[0043] In specific use, the end of the centrifugal sleeve 3 close to the thickening 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, which can provide a larger space for sludge, ensure the maximum sludge carrying capacity of the centrifugal sleeve 3, and through the metal discharge port 33 opened on the blocking plate 34, the thickening discharge port 31 is arranged at the conical top of the centrifugal sleeve 3, and the sewage discharge port 32 is arranged at the straight cylinder wall of the centrifugal sleeve 3, which can effectively adapt to the direction of the required products (sludge rich in ferromagnetic metal, separated sewage, thickened sludge) according to the stirring state and the centrifugal state, and facilitate the discharge of each product. Through the feeding pipe 14 arranged on the feeding support 13, the next batch of sludge to be treated can be injected into the centrifugal sleeve 3 after the sludge treatment of the previous batch is completed, and the feeding pipe 14 does not interfere with the rotation of the centrifugal sleeve 3 and the screw conveyor 6, which can effectively ensure the metal filtration and sludge dewatering process of the centrifugal sleeve 3 containing ferromagnetic metal sludge. The centrifugal sleeve 3 is connected and driven between the driving pulley 42 and the driven pulley 35 through the transmission belt, so that the centrifugal sleeve 3 can be controlled by the frequency output of the centrifugal driving motor 41 to be in the stirring state and the centrifugal state, respectively, to perform the metal filtration and sludge dewatering process of the ferromagnetic metal-containing sludge.

[0044] Example three: please refer to Figures 1-9 The difference from the above-mentioned examples is that the differential gear 61 is fixed on the side of the feeding support 13 close to the centrifugal sleeve 3, and the differential gear 61 includes an outer driving gear ring 611, an inner supporting gear ring 612 and a plurality of driven gears 613; each driven gear 613 is engaged between the outer driving gear ring 611 and the inner supporting gear ring 612, and the outer driving gear ring 611 is connected and driven with the driving pulley 42 through the transmission belt.

[0045] The screw conveyor 6 includes a plurality of screw conveying rods 62, each screw conveying rod 62 includes a driven rod 621, and the outer side of the driven rod 621 is provided with a plurality of screw conveying segments 622; each driven rod 621 is coaxially fixed with each driven gear 613, and under the drive of the outer driving gear ring 611, each driven rod 621 drives the corresponding each screw conveying segment 622 to revolve around the axis of the centrifugal sleeve 3, while each screw conveying segment 622 revolves around the corresponding driven rod 621.

[0046] The diameter of the stirring range covered by each screw conveying rod 62 during self-rotation is less 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 centrifugal action, the concentrated sludge in the lower layer is driven by the screw conveying rod 62 during self-rotation to move to one end of the concentrated discharge port 31, and the separated sewage in the upper layer moves to one end of the sewage discharge port 32 under the action of gravity.

[0047] Specifically, the outer side surface of the screw conveying section 622 is tightly attached to the inner wall of the centrifugal sleeve 3, through the differential mechanism 61, the transmission belt is connected between the outer driving gear ring 611 and the driving pulley 42, and each driven gear 613 drives each corresponding driven rod 621 to drive each corresponding screw conveying section 622 to revolve around the axis of the centrifugal sleeve 3 while each screw conveying section 622 revolves around the corresponding driven rod 621 through the meshing action between each driven gear 613, the outer driving gear ring 611 and the inner support gear ring 612; the rotational speed output by the centrifugal driving motor 41 is decelerated and output to each screw conveying rod 62 through the meshing action between each driven gear 613, the outer driving gear ring 611 and the inner support gear ring 612, so that each screw conveying section 622 can be used to relay the sludge conveying while avoiding excessive reaction force on each screw conveying section 622 to ensure the service life of the screw conveying section 622, and the conveying efficiency of each screw conveying section can be ensured through the tight attachment between the outer side surface of the screw conveying section 622 and the inner wall of the centrifugal sleeve 3, and since the diameter of the stirring range covered by each screw conveying rod 62 during self-rotation is less than the lowest sludge water level inside the centrifugal sleeve 3, the stirring range of each screw conveying rod 62 is below the surface of the separated sewage, which can reduce the interference with the upper sewage and can more effectively apply 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.

[0048] Example four: please refer to Figures 1-9 The difference between the above-mentioned embodiments is that the buffer support 12 is elastically connected to the outer wall of the mounting sleeve 2 through a plurality of buffer cylinders 121 and a plurality of hanging springs 122; the magnetic attraction mechanism 5 includes a magnetic connection housing 51, the magnetic connection housing 51 is fixed to the inner wall of the mounting sleeve 2, and the magnetic connection housing 51 is provided with an electromagnet inside.

[0049] The centrifugal sleeve 3 is provided with an inspection cabinet door 7 at one end close to the sewage discharge port 32, and the inspection cabinet door 7 is centrally provided with an exhaust hose 71, one end of the exhaust hose 71 penetrates the material blocking cover plate 34 and extends into the centrifugal sleeve 3; the other end of the exhaust hose 71 is communicated between the adsorption box 72 and the exhaust fan 73, and 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.

[0050] In use, the buffer support 12 is elastically connected between the outer wall of the mounting sleeve 2 through a plurality of buffer cylinders 121 and a plurality of lifting springs 122, which can ensure the stability of the centrifugal sleeve 3 during high-speed rotation and centrifugation, and avoid the transmission of vibration generated by high-speed rotation to the outside of the protective shell 1. The electromagnet provided in the magnetic connection shell 51 does not interfere with the rotation of the centrifugal sleeve 3, and can avoid pollution of the sludge to the magnetic connection shell 51 and the electromagnet while ensuring the adsorption effect of the magnetic connection shell 51 on the ferromagnetic metal in the sludge in the centrifugal sleeve 3. Through the setting 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, which can adsorb and discharge the gas in the sludge, avoiding gas pollution to the external environment.

[0051] Example five: a processing method for incinerator slag, the sludge generated by the separation of the incinerator slag is subjected to metal filtration and dewatering treatment by using a metal-containing sludge filtration device according to any one of examples one to four, comprising the following steps:

[0052] Take out the incinerator slag, and obtain the upper light material after the magnetic separation and jigging operation of the slag;

[0053] After the upper light material is washed with water, the sludge that is difficult to separate is obtained;

[0054] The sludge is input into the centrifugal sleeve 3, and the centrifugal sleeve 3 is first operated in a stirring state under the action of the centrifugal driving mechanism 4, the magnetic adsorption mechanism 5 generates magnetism, the ferromagnetic metal in the sludge is collected to one end close to the magnetic adsorption mechanism 5, and the part of the sludge rich in ferromagnetic metal is discharged from the metal discharge port 33;

[0055] Then the centrifugal sleeve 3 enters the centrifugal state, the sludge is stratified under the action of high speed, the spiral conveyor 6 drives the concentrated sludge to move to one end of the concentration discharge port 31, and drives the separated sewage to move to one end of the sewage discharge port 32, thereby dewatering the sludge.

[0056] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A metal-containing sludge filtering device, comprising a protective shell, a mounting bracket is arranged inside the protective shell, and a buffer bracket is arranged at the top end of the mounting bracket, characterized in that: The buffer bracket is provided with an installation sleeve inside, and a centrifugal sleeve is sleeved inside the installation sleeve. The top of the buffer support is provided with a centrifugal drive mechanism, which allows the centrifugal sleeve to rotate at two speeds: stirring and centrifugation, under the drive of the centrifugal sleeve. The centrifugal sleeve has a concentration discharge port and a sewage discharge port at its two ends, respectively. A magnetic adsorption mechanism is provided on the outer side of the centrifugal sleeve and at the end near the sewage discharge port. A metal discharge port is also provided at the end of the centrifugal sleeve near the sewage discharge port. The centrifugal sleeve is also equipped with a screw conveyor, which is poweredly connected to the centrifugal drive mechanism through a differential. When the centrifugal sleeve is in the stirring state, the centrifugal sleeve makes a low-speed reciprocating cycle. The magnetic adsorption mechanism generates magnetism, which gathers the ferromagnetic metal in the sludge towards the end close to the magnetic adsorption mechanism, and can discharge some of the sludge rich in ferromagnetic metal from the metal discharge port. When the centrifugal sleeve is in a centrifugal state, the centrifugal sleeve rotates at high speed, and the screw conveyor moves in the same direction at a speed lower than that of the centrifugal sleeve. The sludge separates under high speed. The screw conveyor drives the concentrated sludge to move towards the concentrated discharge port and drives the separated wastewater to move towards the wastewater discharge port.

2. A metal-containing sludge filtration apparatus according to claim 1, characterised in that: The centrifugal sleeve is conical at the end near the concentrated discharge port and straight at the end near the wastewater discharge port; A baffle plate is provided at one end of the centrifugal sleeve near the sewage discharge port, and the metal discharge port is opened on the baffle plate; The concentrated discharge port is located at the conical top of the centrifugal sleeve, and the wastewater discharge port is located on the straight cylindrical wall of the centrifugal sleeve.

3. A metal-containing sludge filtration apparatus according to claim 2, wherein: A feed support is provided on the side of the centrifuge sleeve near the concentration discharge port. A feed pipe is installed inside the feed support. One end of the feed pipe passes through the concentration discharge port and extends into the centrifuge sleeve. The other end of the feed pipe extends out of the protective shell and connects to the sludge supply end.

4. A metal-containing sludge filtration apparatus according to claim 3, wherein: A driven pulley is provided on the outer side of the centrifugal sleeve near the concentration discharge port, and the centrifugal drive mechanism includes a centrifugal drive motor and a drive pulley; The centrifugal drive motor is coaxially fixed with the drive pulley, and the drive pulley and the driven pulley are connected by a transmission belt for transmission.

5. A metal-containing sludge filtration apparatus according to claim 4, wherein: The differential is fixed on the side of the feed bracket near the centrifugal sleeve. The differential includes an outer drive gear ring, an inner support gear ring, and several driven gears. Each of the driven gears meshes with the outer drive gear ring and the inner support gear ring respectively, and the outer drive gear ring is connected to the drive pulley by a transmission belt.

6. A metal-containing sludge filtration apparatus according to claim 5, wherein: 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 provided on the outer side of the driven rod; Each said driven rod is coaxially fixed between each said driven gear, under the drive of said outer driving gear ring, each said driven rod drives corresponding each said spiral conveying section to revolve around said centrifugal sleeve axis, while each said spiral conveying section revolves around corresponding said driven rod.

7. A metal-containing sludge filtration apparatus according to claim 6, wherein: The diameter of the stirring range covered by each said spiral conveying rod during the self-rotation process is less than the lowest sludge water level in said centrifugal sleeve; When said centrifugal sleeve is in a centrifugal state, sludge is stratified into separated sewage and concentrated sludge under the centrifugal action, the lower layer of concentrated sludge moves to one end of said concentrated discharge port under the driving action in the self-rotation process of said spiral conveying rod, and the upper layer of separated sewage moves to one end of said sewage discharge port under the action of gravity.

8. A metal-containing sludge filtration apparatus according to claim 1, wherein: The buffer support is elastically connected between the outer wall of the mounting sleeve and the buffer cylinder and the hanging spring; The magnetic attraction mechanism includes a magnetic connection shell, which is fixed to the inner wall of the mounting sleeve, and an electromagnet is arranged inside the magnetic connection shell.

9. A metal-containing sludge filtration apparatus according to claim 2, wherein: The end of the centrifugal sleeve close to the sewage discharge port is provided with an inspection cabinet door, and an exhaust hose is arranged at the center of the inspection cabinet door, one end of the exhaust hose penetrates through the material blocking cover plate and extends into the inside of the centrifugal sleeve; The other end of the exhaust hose is communicated between the adsorption box and the exhaust fan, and under the power provided by the exhaust fan, the gas separated from the sludge under the centrifugal action can be discharged from the exhaust fan after being adsorbed by the adsorption box.

10. A method for processing incinerator slag, characterized by, The sludge generated by sorting the incinerator slag is subjected to metal filtration and dewatering treatment by using a metal-containing sludge filtration device according to any one of claims 1-9, comprising the following steps: Take out the incinerator slag, and obtain the upper light material after magnetic separation and jigging operation; After water washing of the upper light material, obtain the sludge which is difficult to separate; The sludge is input into the inside of the centrifugal sleeve, and under the action of the centrifugal driving mechanism, the centrifugal sleeve is first operated in a stirring state, the magnetic attraction mechanism generates magnetism, the ferromagnetic metal in the sludge is gathered to one end close to the magnetic attraction mechanism, and the part of the sludge rich in ferromagnetic metal is discharged from the metal discharge port; Then the centrifugal sleeve enters a centrifugal state, the sludge is stratified under high-speed action, the spiral 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, thereby dewatering the sludge.

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