Heavy metal pollution bottom mud treatment wastewater recovery device

Abstract

The invention discloses a heavy metal pollution bottom mud treatment wastewater recovery device, and relates to the technical field of sludge wastewater treatment equipment, the heavy metal pollution bottom mud treatment wastewater recovery device comprises a filter unit, the filter unit comprises a plurality of filter pipe groups, a rotating shaft and two connecting assemblies, the two ends of each filter pipe are provided with adsorption rings through guide rods, and the plurality of filter pipe groups are connected to the peripheral side of the rotating shaft; the connecting assemblies are located at the two ends of the filter pipe set, a plurality of communicating channels are formed in the connecting assemblies, an adsorption part is arranged on a channel opening of each communicating channel, the two ends of the rotating shaft are connected to the two main bodies respectively, and the rotating shaft rotates to enable the polluted filter pipes to move to the position of the backwashing channel and enable the clean filter pipes to move to the position of the wastewater filter channel. When the filter pipe is switched to be polluted, the backwashing communication pipeline flushes the switched polluted filter pipe for standby application, and wastewater is re-introduced into the wastewater filter channel and the switched clean filter pipe, so that the device recovers normal operation, and the problem that the recovery device is difficult to operate normally due to backwashing of the filter pipe is avoided to a great extent.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge and wastewater treatment equipment, and specifically to a device for treating heavy metal - contaminated sediment and recycling wastewater. Background Art

[0002] Heavy metal - contaminated sediment mainly comes from industrial wastewater discharge, such as electroplating, mining, metallurgy, urban sewage deposition, and agricultural runoff, and contains toxic heavy metals such as lead, cadmium, mercury, and arsenic. If such sediment is directly stacked or landfilled without treatment, it will release heavy metals through rain leaching and percolation, polluting groundwater and the surrounding ecological environment. Currently, sediment treatment technologies include stabilization / solidification, chemical leaching, electrokinetic remediation, and biological treatment, etc. However, a large amount of heavy - metal - containing wastewater will be generated during the treatment process, and efficient recovery and purification are urgently needed.

[0003] Membrane separation technology is widely used in the treatment of heavy - metal wastewater. There is currently a filter tube filled with ultrafiltration filter elements inside to filter wastewater. Through the ultrafiltration filter elements, colloids and macromolecular pollutants can be intercepted, and dissolved heavy metals can be removed. The effluent quality of this wastewater recycling device based on membrane separation technology is relatively high. However, when the equipment operates for a long time, membrane fouling will occur, such as scaling, colloid deposition, and biological fouling, etc., and it is necessary to regularly clean the ultrafiltration filter elements inside the filter tube.

[0004] When cleaning the existing filter tube, generally, the methods of disassembly cleaning and overall backwashing are adopted. However, both of the above - mentioned cleaning methods can only be completed after the wastewater treatment device is shut down. During the period when the equipment is shut down for cleaning, the wastewater treatment system cannot operate, resulting in the backlog of wastewater to be treated and prolonging the overall treatment cycle. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for treating heavy metal - contaminated sediment and recycling wastewater, which can greatly avoid the influence of the filter element cleaning of the filter tube on the normal operation of the wastewater recycling device.

[0006] The technical solution of the present invention is as follows: A device for treating wastewater and recovering heavy metal - contaminated sediment, comprising: a filtering unit, the filtering unit includes: at least two groups of filter tubes, each group of filter tubes includes: a filter tube, and a plurality of guide rods are vertically arranged on the end faces at both ends; two adsorption rings, which are installed at both ends of the filter tube through the guide rods and can slide along the guide rods, and a sealing sleeve is connected between the adsorption ring and the end face of the filter tube; a rotating shaft, and the two groups of filter tubes are arranged on the periphery of the rotating shaft through a connecting arm; a connecting component, including: a first connecting component and a second connecting component, which are respectively located at both ends of the filter tube group, the main body of each connecting component is a disc - shaped structure, and at least two communicating channels are opened along the thickness direction of the main body, and the two communicating channels are respectively used as a wastewater filtering channel and a back - flushing channel, and an adsorbent capable of adsorbing the adsorption ring is arranged at the channel opening of each communicating channel, and both ends of the rotating shaft are respectively connected to the central positions of the two main bodies, so that the two filter tubes are respectively aligned with the two communicating channels, and are detachably connected to the filter tubes through the adsorbents at the channel openings, and the rotating shaft rotates to switch the filter tubes between the two communicating channels.

[0007] Further, the channel opening of the communicating channel indents inward from the side surface of the main body to form a connecting channel between the end face of the channel opening of the communicating channel and the side surface of the main body. The adsorbent is an annular electromagnet, the adsorbent is embedded in the end face of the channel opening of the communicating channel, the adsorption ring is made of a metal material that can be adsorbed by the electromagnet, the adsorption ring is located outside the communicating channel and can enter the connecting channel through the adsorption of the adsorbent. The electromagnet has adsorption ability when powered on and loses adsorption ability when powered off, which is more convenient to control, and the suction force is easier to control, which can ensure the tight connection between the adsorbent and the adsorption ring. And in order to improve the sealing effect at the connection, a sealing rubber ring can be sleeved on the inner wall of the communicating channel.

[0008] Further, a filter element is filled inside the filter tube, and the filter element can be cleaned by the method of back - flushing.

[0009] Further, a return spring is sleeved on the guide rod. One end of the return spring is connected to the end face of the filter tube, and the other end is connected to the annular end face of the adsorption ring. After the electromagnet is powered off, the return spring pulls the adsorption ring out of the connecting channel through the contraction force, so that the filter tube can switch positions following the rotation of the rotating shaft.

[0010] Furthermore, a connector is connected in each of the communication channels. A first connector is connected to the two communication channels of the first connection assembly, and a second connector is connected to the two communication channels of the second connection assembly. One of the first connectors is connected to a waste water communication pipe, and one of the second connectors is connected to a waste water communication pipe. The two waste water communication pipes, the two waste water filtration channels, and the filter pipe between the two waste water filtration channels are located on the same axis and form a filtration path. The other second connector is connected to a backwash communication pipe. The backwash communication pipe, the two backwash channels, and the filter pipe between the two backwash channels are located on the same axis and form a backwash path. The backwash path is connected to an external cleaning source, and the pressurized cleaning liquid is filled into the filter pipe between the two backwash channels through the backwash communication pipe to clean this filter pipe for standby.

[0011] Furthermore, in order to fix the connection assembly and collect and centrally discharge the cleaning liquid after backwashing, the waste water recovery device further includes an outer casing. The outer casing is sleeved outside the filtration unit. A drain pipe is provided at the bottom of the outer casing. The first connectors are all located in the inner cavity of the outer casing. One end of the second connector away from the second connection assembly extends to the outside of the outer casing. The waste water communication pipe passes through the wall of the outer casing and is connected to the first connector in the waste water filtration channel. The inner wall of the bottom of the inner cavity of the outer casing adopts a drainage slope that is concave towards the drain pipe, so that the cleaning liquid can flow along the drainage slope towards the drain pipe.

[0012] Furthermore, the waste water recovery device includes a plurality of the filtration units. The plurality of filtration units are arranged in sequence along the length direction of the filter pipe group, and adjacent two filtration units are connected by an adapter assembly. The adapter assembly includes: an adapter communication pipe, which is connected between the waste water communication pipes of adjacent two filtration units; a rotating shaft adapter rod, which connects the rotating shafts of adjacent two filtration units. Through the setting of the plurality of filtration units, the waste water generated by sludge treatment can be filtered through the waste water filtration channels and the filter pipe group of the plurality of filtration units in sequence, and the polluted filter pipe can be backwashed through the backwash communication pipe separately configured for each filtration unit. And through the rotation of the rotating shaft, the cleaned filter pipe and the polluted filter pipe are replaced. This can not only ensure the purification effect of the filter pipe on the waste water, but also can clean the filter pipe of a certain section of the filtration unit of the waste water recovery device separately without affecting the operation of the overall recovery device.

[0013] Furthermore, the adapter assembly further includes: a protective adapter pipe, which is connected to the outer casing through connecting flanges at both ends. The protective adapter pipe wraps the adapter communication pipe and the rotating shaft adapter rod in its pipeline for protecting the adapter communication pipe and the rotating shaft adapter rod.

[0014] Furthermore, one end of the backwash connection pipe away from the backwash channel extends to the outside of the protective connection pipe, which is more convenient for connecting the backwash connection pipe to an external cleaning source.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention provides a detachable filter pipe between two connection components. Different from the existing detachable filter pipes, the filter pipe of the present invention does not need to be removed from the filter unit. Instead, through the rotation of the rotating shaft, the filter pipe is switched between the wastewater filtration channel and the backwash channel. Due to long-term use, the clogged and contaminated filter pipe is disconnected from the wastewater filtration channel, and the cleaned and clean filter pipe is disconnected from the backwash channel. Both filter pipes rotate with the rotating shaft, moving the contaminated filter pipe to the position of the backwash channel and the clean filter pipe to the wastewater filtration channel. Through the action of the adsorption accessory and the adsorption disc, they are reconnected and communicated. The backwash connection pipe flushes and reserves the contaminated filter pipe switched over. Wastewater is re-introduced into the wastewater filtration channel and the switched-over clean filter pipe, enabling the device to resume normal operation. The present invention can quickly cut off and restore the connection between the communication channel and the filter pipe through the adsorption accessory and the adsorption ring. Through the rotation of the rotating shaft, the filter pipe can be accurately and quickly switched between the wastewater filtration channel and the backwash channel, greatly avoiding the problem that the recycling device is difficult to operate normally due to disassembling and replacing the filter pipe or shutting down the machine for backwashing the filter pipe.

[0016] 2. Through the arrangement of multiple filter units, the wastewater generated from sludge treatment can be filtered successively through the wastewater filtration channels and the filter pipe groups of multiple filter units. This not only can extend the travel of wastewater filtration, improve the effect of wastewater filtration and purification, but also can backwash the contaminated filter pipe through the backwash connection pipe separately configured for each filter unit, and through the rotation of the rotating shaft, switch the cleaned filter pipe and the contaminated filter pipe. This can not only ensure the purification effect of the filter pipe of each wastewater unit on wastewater, but also can separately clean the filter pipe of a certain section of the filter unit of the wastewater recycling device, avoid overall backwashing of the filter pipe filter element of the recycling device, reduce the time consumed by backwashing, and at the same time reduce the downtime of the equipment due to the need to shut down for cleaning the overall filter element, improving the utilization rate of the wastewater recycling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the external structure schematic diagram of the filter unit of the present invention.

[0018] Figure 2 It is the external structure schematic diagram of the outer casing of the present invention.

[0019] Figure 3 It is the internal structure schematic diagram of the outer casing and the filter unit of the present invention.

[0020] Figure 4 is Figure 3 Schematic diagram of the connection position of the waste water connecting pipe and the backwashing connecting pipe on the right end face in

[0021] Figure 5 is Figure 3 Schematic diagram of the connection position of the waste water connecting pipe on the left end face in

[0022] Figure 6 is Figure 3 Schematic diagram of the a-a cross-sectional structure in

[0023] Figure 7 Schematic diagram of the connection structure between multiple filter tube assemblies and the rotating shaft of the present invention.

[0024] Figure 8 is Figure 3 Enlarged view of the structure diagram of area A in

[0025] Figure 9 Schematic diagram of the backwashing connecting pipe structure in the waste water recovery device of Embodiment 2 of the present invention.

[0026] Figure 10 Schematic diagram of the waste water connecting pipe structure in the waste water recovery device of Embodiment 2 of the present invention.

[0027] Figure 11 Schematic diagram of the protective connection pipe structure of the present invention.

[0028] Wherein, 1. Filter tube group, 11. Filter tube, 111. Filter element, 12. Adsorption ring, 13. Sealing sleeve, 14. Guide rod, 15. Connecting arm, 16. Connecting plate, 2. Rotating shaft, 3. Connecting component, 31. Communication channel, 32. Adsorbing part, 4. First joint, 5. Second joint, 6. Outer shell, 61. Connecting flange, 62. Drain pipe, 63. Drain slope, 7. Waste water connecting pipe, 8. Backwashing connecting pipe, 9. Connecting component, 91. Rotating shaft connecting rod, 92. Connecting communication pipe, 93. Protective connection pipe. Detailed implementation manners

[0029] The following combines Figures 1 to 11 , and describes the detailed implementation manners of the present invention in detail. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0031] It should be noted that the circuit connections of the electromagnets and drive motors involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0032] Embodiment 1 As Figure 1 shown, a device for treating heavy metal contaminated sediment and recycling wastewater includes: a filtering unit, the filtering unit includes: four filtering tube groups 1, a rotating shaft 2 and two connecting components 3, each filtering tube group 1 includes: a filtering tube 11, two adsorption rings 12 and a sealing sleeve 13, and a plurality of guide rods 14 are vertically arranged on the end faces at both ends of the filtering tube 11. The plurality of guide rods 14 are arranged in a circular array with the central axis of the filtering tube 11 as the axis; as Figure 8 shown, the two adsorption rings 12 are installed at both ends of the filtering tube 11 through the guide rods 14 and can slide along the guide rods 14. A limiting piece is provided at one end of the guide rod 14 to prevent the adsorption ring 12 from slipping off the guide rod 14; as Figure 8 shown, two sealing sleeves 13 are connected between the end face of the adsorption ring 12 and the filtering tube 11. One end of one sealing sleeve 13 is respectively connected to the inner ring surface of the adsorption ring 12 and the inner pipe wall of the filtering tube 11. A passage is formed by connecting the inner wall of this sealing sleeve 13 with the inner ring surface of the adsorption ring 12 and the inner pipe wall of the filtering tube 11. The two ends of the other sealing sleeve 13 are respectively connected to the position near the outer ring surface of the end face of the adsorption ring 12 and the position near the outer pipe wall of the end face of the filtering tube 11, and the guide rod 14 is located between the two sealing sleeves 13; as Figure 7 shown, the four filtering tube groups 1 are all connected to the periphery of the rotating shaft 2 through connecting arms 15, and the adsorption rings 12 between adjacent filtering tube groups 1 are connected through connecting plates 16 to realize synchronous movement of the plurality of adsorption rings 12. The connecting arms 15 and the rotating shaft 2 are detachably connected by bolts so as to replace the filtering tube group 1 separately; as Figure 1 shown, the connecting component 3 includes: a first connecting component and a second connecting component, which are respectively located at both ends of the filtering tube group 1. The left one is the first connecting component and the right one is the second connecting component; as Figure 6As shown, the main body of each connecting component 3 is a disc-shaped structure, and four communicating channels 31 are opened along the thickness direction of the main body. The four communicating channels 31 serve as wastewater filtration channels and backwashing channels respectively. Among them, the two communicating channels 31 on the left side serve as wastewater filtration channels, and the two communicating channels 31 on the right side serve as backwashing channels. An adsorbent 32 capable of adsorbing the adsorption ring 12 is provided at the channel opening of each communicating channel 31. Both ends of the rotating shaft 2 are respectively connected to the central positions of the two main bodies, so that the two filter tubes 11 are respectively aligned with the two communicating channels 31, and are detachably connected to the filter tubes 11 through the adsorbent 32 at the channel opening. The rotating shaft 2 rotates through an externally connected driving motor to switch the filter tubes 11 between the two communicating channels 31. It should be noted that the output shaft of the driving motor is connected to the rotating shaft 2, and the driving motor can rotate at a set speed and rotation time, so that the angle of each rotation of the rotating shaft 2 can make the two filter tubes 11 on the left side switch from the wastewater filtration channels on the left side to the positions of the backwashing pipelines on the right side, and make the two filter tubes 11 on the right side switch from the backwashing pipelines on the right side to the positions of the wastewater filtration channels on the left side. Before switching the filter tubes 11, first control the adsorbent 32 to disconnect the adsorption of the adsorption ring 12, so that the filter tubes 11 can rotate with the rotating shaft 2, and after the switching of the filter tubes 11 is completed, control the adsorbent 32 to adsorb and fix the adsorption ring 12, so that the communication state between the communicating channel 31 and the filter tube 11 is restored again.

[0033] In some embodiments, as Figure 8 shown, the channel opening of the communicating channel 31 indents inward from the side surface of the main body to form a connecting channel between the end surface of the channel opening of the communicating channel 31 and the side surface of the main body. The adsorbent 32 is an annular electromagnet, and the adsorbent 32 is embedded in the end surface of the channel opening of the communicating channel 31. The adsorption ring 12 is made of a metal material that can be adsorbed by the electromagnet. The adsorption ring 12 is located outside the communicating channel 31 and can enter the connecting channel through the adsorption of the adsorbent 32. The electromagnet has adsorption ability when energized and loses adsorption ability when powered off, which is more convenient to control, and the suction force is easier to control, which can ensure the tight connection between the adsorbent 32 and the adsorption ring 12. And in order to improve the sealing effect of the connection, a sealing rubber ring can be sleeved on the inner wall of the communicating channel 31.

[0034] In some embodiments, a filter element 111 is filled inside the filter tube 11, and the filter element 111 can be cleaned by backwashing.

[0035] In some embodiments, as Figure 8As shown, a return spring is sleeved on the guide rod 14. One end of the return spring is connected to the end face of the filter tube 11, and the other end is connected to the annular end face of the adsorption ring 12. After the electromagnet is powered off, the return spring pulls the adsorption ring 12 out of the connection channel through the contraction force, so that the filter tube 11 can switch positions following the rotation of the rotating shaft 2.

[0036] In some embodiments, as Figure 3 shown, a joint is connected in each communication channel 31. A first joint 4 is connected to the two communication channels 31 of the first connection assembly, and a second joint 5 is connected to the two communication channels 31 of the second connection assembly. As Figures 3 to 4 and Figure 5 shown, the two first joints 4 located at the rear side are connected to a waste water connection pipe 7, and the two second joints 5 located at the front side are connected to a waste water connection pipe 7. The two waste water connection pipes 7, the two waste water filtration channels and the filter tube 11 between the two waste water filtration channels are on the same axis and form a filtration path; another second joint 5 is connected to a backwash connection pipe 8. The backwash connection pipe 8, the two backwash channels and the filter tube 11 between the two backwash channels are on the same axis and form a backwash path. The backwash path passes through an external cleaning source, and the pressurized cleaning liquid is filled into the filter tube 11 between the two backwash channels through the backwash connection pipe 8 to clean this filter tube 11 for standby.

[0037] In some embodiments, in order to fix the connection assembly 3 and collect and centrally discharge the cleaning liquid after backwashing, as shown in 2 and Figure 3 shown, the waste water recovery device further includes an outer housing 6. The outer housing 6 is sleeved outside the filtration unit. A drain pipe 62 is opened at the bottom of the outer housing 6. The first joints 4 are all located in the inner cavity of the outer housing 6. One end of the second joint 5 away from the second connection assembly extends to the outside of the outer housing 6; the waste water connection pipe 7 passes through the wall of the outer housing 6 and is communicated with the first joint 4 in the waste water filtration channel. The cleaning liquid enters the filter tube 11 from the right through the backwash connection pipe 8, passes through the filter element 111 of the filter tube 11, and is discharged to the inner cavity of the outer housing 6 from the first joint 4 on the left side of the filter tube 11, and is discharged through the drain pipe 62 at the bottom of the inner cavity. As Figure 3 shown, the inner wall at the bottom of the inner cavity of the outer housing 6 adopts a drainage slope 63 that is concave towards the drain pipe 62.

[0038] Embodiment 2 The difference from Embodiment 1 is that, as Figure 9 and Figure 10As shown in the figure, the wastewater recycling device of this embodiment includes a plurality of filtering units, which are arranged in sequence along the length direction of the filter pipe group 1, and two adjacent filtering units are connected by a connection component 9. The connection component 9 includes: a connection communication pipe 92 and a rotating shaft connection rod 91. The wastewater communication pipes 7 of two adjacent filtering units are connected by the connection communication pipe 92, and the rotating shafts 2 of two adjacent filtering units are connected by the rotating shaft connection rod 91.

[0039] Through the setting of a plurality of filtering units, the wastewater generated by sludge treatment can be filtered through the wastewater filtering channels and the filter pipe group 1 of a plurality of filtering units in sequence, and the polluted filter pipe 11 can be backwashed through the backwashing communication pipe 8 configured for each filtering unit separately. And through the rotation of the rotating shaft 2, the cleaned filter pipe 11 and the polluted filter pipe 11 are replaced. This can not only ensure the purification effect of the filter pipe 11 on the wastewater, but also can clean the filter pipe 11 of a certain section of the filtering unit of the wastewater recycling device separately without affecting the operation of the overall recycling device.

[0040] It should be noted that in order to monitor the purification effect of the filter pipe 11 of each section of the filtering unit, a flow meter, a pressure gauge, etc. can be set on the wastewater communication pipe 7 at the water outlet position of each section of the filtering unit to detect the flow rate and pressure changes at the wastewater communication pipe 7 to judge whether the filtering unit is blocked. This technology is an existing technical means and will not be elaborated here too much.

[0041] As Figure 9 and Figure 10 shown in the figure, the connection component 9 further includes: a protective connection pipe 93, the two ends of which are connected to the outer casing 6 through connection flanges 61. The protective connection pipe 93 wraps the connection communication pipe 92 and the rotating shaft connection rod 91 in its pipeline for protecting the connection communication pipe 92 and the rotating shaft connection rod 91.

[0042] As Figure 9 shown in the figure, one end of the backwashing communication pipe 8 far away from the backwashing channel extends to the outside of the protective connection pipe 93, which is more convenient to connect with an external cleaning source.

[0043] As Figure 11 shown in the figure, the protective connection pipe 93 forms a pipeline by being buckled by two C-shaped pipe clamps. Such a design can facilitate the installation of the protective connection pipe 93 after connecting the wastewater communication pipe 7 and the connection communication pipe 92.

[0044] The above-disclosed are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A device for treating heavy metal - contaminated sediment and recycling wastewater, characterized in that, include: A filter unit, comprising: At least two filter tube groups, each of which includes: a filter tube; two adsorption rings arranged at both ends of the filter tube; A rotating shaft, wherein the filter tube group is arranged on a circumferential side of the rotating shaft; The connecting assembly includes: a first connecting assembly and a second connecting assembly, which are respectively located at the two ends of the filter tube group. The main body of each connecting assembly is a disc-shaped structure, and at least two connecting channels are opened on the main body along its thickness direction. The two connecting channels serve as a wastewater filtration channel and a backwash channel respectively. The channel opening of each connecting channel is provided with an adsorption member capable of adsorbing an adsorption ring. The two ends of the rotating shaft are respectively connected to the center position of the two main bodies so that the two filter tubes are aligned with the two connecting channels respectively, and the adsorption member at the channel opening and the filter tube are detachably connected. The rotating shaft rotates to switch the filter tube between the two connecting channels.

2. The heavy metal contaminated sediment wastewater treatment and recycling device according to claim 1, characterized in that, The channel opening of the connecting channel is indented inward from the side of the main body to form a connecting channel between the channel opening end face of the connecting channel and the side face of the main body. The adsorption part is a ring-shaped electromagnet, and the adsorption part is embedded in the channel opening end face of the connecting channel. The adsorption ring is made of a metal material that can be adsorbed by the electromagnet. The adsorption ring is located outside the connecting channel and can enter the connecting channel through the adsorption of the adsorption part.

3. The heavy metal contaminated sediment treatment and wastewater recovery device according to claim 1, characterized in that, The filter tube is filled with a filter element.

4. A heavy metal contaminated sediment treatment wastewater recycling device according to claim 1, characterized in that, A plurality of guide rods are vertically provided on the end faces of both ends of the filter tube, the adsorption ring is slidably sleeved on the guide rods, and a reset spring is sleeved on the guide rods. One end of the reset spring is connected to the end face of the filter tube, and the other end is connected to the annular end face of the adsorption ring. A sealing sleeve is connected between the adsorption ring and the end face of the filter tube.

5. A heavy metal contaminated sediment treatment and wastewater recycling device according to claim 1, characterized in that, Each of the communicating channels is connected to a joint, the two communicating channels of the first connecting component are connected to a first joint, and the two communicating channels of the second connecting component are connected to a second joint; one of the first joints is connected to a wastewater communicating pipe, and one of the second joints is connected to a wastewater communicating pipe, the two wastewater communicating pipes, the two wastewater filtering channels and the filter tube between the two wastewater filtering channels are located on the same axis and form a filtering passage; the other second joint is connected to a backwash communicating pipe, the backwash communicating pipe, the two backwash channels and the filter tube between the two backwash channels are located on the same axis and form a backwash passage.

6. The heavy metal contaminated sediment wastewater treatment and recycling device according to claim 5, characterized in that, It also includes an outer shell, which is arranged on the outside of the filter unit. A drain pipe is provided at the bottom of the outer shell. The first joints are located in the inner cavity of the outer shell, and the second joints extend to the outside of the outer shell away from one end of the second connecting component; the wastewater connecting pipe passes through the shell wall of the outer shell and is connected to the first joint in the wastewater filtration channel.

7. The wastewater recovery device for treating heavy metal contaminated sediment according to claim 6, wherein, There are multiple filter units, which are arranged in sequence along the length direction of the filter tube group, and two adjacent filter units are connected by a connecting component, which includes: The wastewater connecting pipes of two adjacent filter units are connected by a connecting connecting pipe; The rotating shaft connecting rod, the rotating shafts of two adjacent filtering units are connected by the rotating shaft connecting rod.

8. The heavy metal contaminated sediment wastewater treatment and recycling device according to claim 7, characterized in that, The connecting assembly further includes: a protective connecting pipe, the two ends of which are connected to the outer casing through connecting flanges, and the protective connecting pipe wraps the connecting communicating pipe and the rotating shaft connecting rod in its pipeline.

9. A heavy metal contaminated sediment treatment and wastewater recovery device according to claim 8, characterized in that One end of the backwashing communicating pipe far from the backwashing channel extends to the outside of the protective connecting pipe.

Images