River heavy metal pollution bottom mud wastewater treatment device

Abstract

The invention belongs to the technical field of water treatment equipment, and particularly discloses a river heavy metal pollution bottom mud wastewater treatment device which comprises a base body, a rotating shaft, a sleeve, fan blades, a driving part, a cover body and an adsorption part, one end of the rotating shaft is rotationally arranged on the base body, a spray head is arranged at the other end of the rotating shaft, a channel is formed in the rotating shaft, and the spray head communicates with one end of the channel; the other end of the channel is used for being communicated with a gas source or a liquid source, the sleeve is coaxial with the rotating shaft and arranged on the outer side of the rotating shaft in a sleeving mode, the fan blades are arranged on the rotating shaft at the waste water inlet, the cover is fixed to the base body, the rotating shaft and the sleeve are located in the cover, and the adsorption part adopts kieselguhr to conduct heavy metal pollutant adsorption treatment. According to the invention, a gas source or a liquid source is matched with the rotating shaft to impact bottom mud, the bottom mud is dispersed and then is mixed with a water body above the bottom mud, the water body is disturbed by utilizing the fan blades in the adsorption cavity formed by the cover body, so that the water flow is accelerated, and the diatomite in the adsorption part is utilized to adsorb heavy metal pollutants.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment equipment, and in particular relates to a device for treating river heavy metal-contaminated sediment wastewater. Background Art

[0002] With industrialization and economic development, heavy metal pollution in rivers has become a global problem. Pollution stems from a wide range of sources, including industrial wastewater containing heavy metals such as mercury and cadmium, agricultural non-point source pollution from the use of pesticides and fertilizers, and atmospheric deposition, which exacerbates pollution. Heavy metal pollutants that enter rivers accumulate in sediments, altering their properties, inhibiting the survival of benthic organisms, and affecting higher-trophic-level organisms through the food chain. When environmental changes occur, heavy metals in the sediments are released, causing secondary pollution that harms water quality, depletes various water functions, disrupts surrounding ecosystems, and ultimately endangers human health. Therefore, the treatment of wastewater from rivers containing heavy metal-contaminated sediments is urgent.

[0003] Currently, physicochemical methods offer significant advantages over biological and chemical treatment for wastewater treatment. Compared to biological treatment, physicochemical methods are not restricted by microbial growth conditions and do not require the cultivation of specific microorganisms. However, when treating low-temperature, highly toxic wastewater, biological microorganisms are susceptible to inactivation. However, physicochemical methods operate stably, have short treatment cycles, and can rapidly purify wastewater. Compared to chemical treatment, physicochemical methods do not require the addition of large amounts of chemical agents, effectively reducing the risk of secondary contamination.

[0004] Among the physical and chemical methods, the use of diatomaceous earth to treat heavy metal wastewater has been widely used. Diatomaceous earth is a non-metallic mineral formed by the accumulation of diatom remains. Due to its unique physical and chemical properties, it shows important application value and significant advantages in the adsorption of heavy metal pollutants in wastewater. In the existing technology, the wastewater is often pumped into a reactor for treatment using diatomaceous earth, but this method is not suitable for river wastewater treatment, mainly because the river flow is large, the water body is continuously flowing, the pumping treatment consumes a lot of energy, the cost is huge and it is difficult to sustain. What's more, heavy metal pollutants accumulate in the bottom sediment in large quantities. It is difficult to effectively remove heavy metal pollutants by treating river wastewater alone. Further treatment of the river bottom sediment is required. The current method of treating river bottom sediment is mostly through mechanical excavation or hydraulic suction to remove the contaminated bottom sediment from the water body for ex situ treatment or safe disposal. Such a treatment method requires a large amount of dredging of the bottom sediment, which is costly and easy to damage the benthic ecology. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide a river heavy metal contaminated sediment wastewater treatment device, which can effectively remove heavy metal pollutants in river heavy metal contaminated sediment wastewater.

[0006] The technical solution of the present invention is: a device for treating river heavy metal polluted sediment wastewater, comprising a base, a rotating shaft, a sleeve, fan blades, a driving part, a cover and an adsorption part.

[0007] One end of a rotating shaft is rotatably mounted on a base, and a nozzle is disposed at the other end. A channel is disposed within the rotating shaft, the nozzle communicating with one end of the channel, and the other end of the channel is connected to an impact source. One end of the rotating shaft with the nozzle is inserted into river sediment, and the impact source impacts the sediment through the nozzle, causing the sediment to diffuse and mix with river water. The impact source can be a gas or liquid source. A sleeve is coaxial with the rotating shaft and sleeves onto the outside of the rotating shaft. One end of the sleeve is fixed to the base, and the inner sidewall of the other end and the outer sidewall of the rotating shaft form a wastewater inlet. The sleeve is provided with a wastewater outlet. Fan blades are disposed on the rotating shaft at the wastewater inlet. A drive member is connected to the rotating shaft and is configured to drive the rotating shaft to rotate, thereby driving the fan blades to rotate, so that river water carrying sediment is drawn in through the wastewater inlet and discharged through the wastewater outlet. A cover is fixed to the base, and the rotating shaft and sleeve are located within the cover, with an adsorption chamber formed between the cover and sleeve. There are multiple adsorbents, all located within the adsorption chamber. The adsorbents use diatomaceous earth to adsorb heavy metal pollutants. The adsorbents are rotatably mounted on a base, and there are multiple wastewater outlets, each corresponding to and opposing the multiple adsorbents. The water discharged from the wastewater outlets drives the adsorbents to rotate. The water discharged from the wastewater outlets directly impacts the adsorbents, causing them to rotate, driving the internal diatomaceous earth to rotate synchronously with the adsorbents. The diatomaceous earth particles continuously change their relative position to the water flow during rotation, continuously exposing unsaturated adsorption surfaces. This avoids the loss of efficiency caused by local point saturation during static adsorption, extends a single adsorption cycle, and improves the heavy metal removal rate.

[0008] A gas or liquid source, combined with channels within the rotating shaft and nozzles, impacts the bottom sludge, dispersing it within the adsorption chamber formed by the housing and mixing it with the river water above. A driver drives the rotating shaft, which in turn rotates the fan blades, drawing the river water carrying the bottom sludge into the wastewater inlet and discharging it from the wastewater outlet. This disturbs the water and accelerates the flow, allowing the diatomaceous earth adsorbent to adsorb and treat heavy metal contaminants. This driver drives the rotating shaft, which in turn rotates the fan blades, not only drawing the river water carrying the bottom sludge into the wastewater inlet and discharging it from the wastewater outlet, but also enhancing the water flow. Furthermore, it can vigorously stir the river water carrying sediment entering from the wastewater inlet to break the stratification of the sediment wastewater. It can draw the sediment-containing water from the wastewater inlet into the annular space between the casing and the rotating shaft, and then evenly flow into the adsorption chamber through the wastewater outlet on the casing, forming a vortex or turbulent flow in the chamber, achieving further flow of the water, effectively dispersing heavy metal pollutants into the water, increasing their contact area with the adsorption material, and improving subsequent adsorption efficiency. The adsorption element uses diatomaceous earth for heavy metal pollutant adsorption. Due to its porous structure and large specific surface area, diatomaceous earth has strong physical adsorption and ion exchange capabilities for heavy metal pollutants, and can efficiently capture heavy metal ions in water.

[0009] Furthermore, the adsorbent includes a first container, a second container, and a third container. The first container is rotatably mounted on the base and has a first cavity for holding a first filtrate and a water outlet. The second container has a second cavity for holding a second filtrate and a water inlet. A third container is fixed to the first container at one end and to the second container at the other end. The third container has a third cavity for holding the diatomaceous earth. One end of the third cavity communicates with the first cavity, and the other end communicates with the second cavity. Water enters the second cavity from the water inlet, flows from the third cavity into the first cavity, and then flows out through the water outlet. Because diatomaceous earth is in powder form, it is easily lost when used in water treatment, and this is accompanied by the loss of adsorbed heavy metal pollutants. Therefore, the second container, the third container, and the first container are connected in series from the water inlet to the water outlet, with the front and rear ends of the diatomaceous earth blocked by the first and second filtrate, respectively, effectively preventing the risk of loss of the powdered diatomaceous earth.

[0010] Furthermore, there are multiple second containers, and the multiple second containers are evenly distributed on the outside of the first container. There are multiple third containers, and the multiple second containers correspond one-to-one to the multiple third containers, and are fixed to the first container through the third containers. Each second container is connected to the first container through the corresponding third container, forming a "multi-in and one-out" flow path, ensuring that the water flow can effectively enter from the second container and fully contact with the diatomaceous earth in the third container, thereby improving the adsorption efficiency of heavy metal pollutants. In addition, the evenly distributed second and third containers form a symmetrical structure. When the adsorbent is driven to rotate by the water flow, the impact forces of the water flow in each direction are balanced with each other, reducing the eccentric force during the rotation process, so that the adsorbent can continue to rotate.

[0011] Furthermore, the first container includes a first shell and a first internal tube. The first shell is a cylindrical structure, one end of which is rotatably mounted on the base. A connecting groove is provided on the side wall of the first shell. One end of the third container is fixed to the connecting groove, and the other end is connected to the second container. The first internal tube is coaxially arranged within the first shell, and a first through hole is provided on the side wall of the first internal tube. The outer wall of the first internal tube and the inner wall of the first shell form the first cavity.

[0012] Furthermore, the second container includes a second shell and a second internal tube. The second shell is a cylindrical structure, and a second through hole is provided on a side wall of the second shell. The second internal tube is coaxially disposed within the second shell and is provided with a third through hole. The outer wall of the second internal tube and the inner wall of the second shell form the second cavity. One end of the third container extends through the second shell and is fixed to the second internal tube.

[0013] Furthermore, the third container includes a third shell and an impact plate. The third shell is a rectangular tubular structure, one end of which is fixed to the second internal tube extending through the second shell and the other end is fixed to the connecting groove. The third shell tubular cavity constitutes the third volume. The impact plate is an arc-shaped structure, one end of which is fixed to the third shell.

[0014] Furthermore, the rotating shaft is provided with a support portion, which includes a disc and an expansion ring. The disc is provided on the rotating shaft, located at one end near the nozzle. The expansion ring is sleeved on the outside of the disc, and the expansion ring and the disc are connected by a plurality of rods.

[0015] Furthermore, the processing device also includes a negative pressure member, which is connected to the water outlet and is used to provide negative pressure to the water outlet.

[0016] Furthermore, the cover body is a telescopic structure, comprising a first cover body and a second cover body. The first cover body is a tubular structure, disposed at the lower end of the base body, with a placement cavity provided on the inner wall of the first cover body and a telescopic member provided on the outer wall of the first cover body. The second cover body is a tubular structure, with one end slidably disposed within the placement cavity and the other end fixed to the telescopic end of the telescopic member.

[0017] Working principle of the present invention: One end of the rotating shaft with a nozzle is inserted into the riverbed mud, and a gas source or a liquid source transports gas to the internal channel of the rotating shaft. The gas is released through the exhaust hole of the nozzle, impacting the bottom mud, causing the bottom mud to diffuse and mix with the river water.

[0018] The driving part starts and drives the rotating shaft to rotate, and the fan blades fixed on the rotating shaft rotate synchronously. The fan blades are located at the wastewater inlet and through mechanical rotation, the water containing bottom mud is sucked from the wastewater inlet into the annular space between the casing and the rotating shaft.

[0019] The sucked wastewater flows in the annular space between the casing and the rotating shaft, is discharged through the wastewater outlet on the casing, and enters the adsorption chamber. The heavy metal pollutants are adsorbed by the diatomaceous earth placed inside the adsorption element. The diatomaceous earth fixes the heavy metal pollutants in the wastewater in its own structure through surface adsorption, microporous interception and chemical functional group combination, thereby realizing the transfer of pollutants from the water phase to the solid phase.

[0020] Compared with existing technologies, the present invention has the following advantages: it uses a gas or liquid source in conjunction with a rotating shaft to impact the bottom mud, dispersing it and allowing it to mix with the water above. Fan blades then disturb the water within the adsorption chamber formed by the cover, accelerating the water flow and allowing the diatomaceous earth within the adsorption element to adsorb and treat heavy metal pollutants. This entire process, coupled with a multi-mechanism of "dynamic disturbance + porous material adsorption," achieves efficient capture of heavy metal pollutants. It combines compact structure, low energy consumption, easy maintenance, and strong environmental performance. It is particularly suitable for on-site treatment or in-situ remediation of river sediment wastewater, and has strong engineering application value and promotion potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Enlarged view of point A; Figure 3 It is a partial structural schematic diagram of the adsorption member of the present invention; Figure 4 is a transverse cross-sectional view of the adsorption member of the present invention; Figure 5 It is a partial structural schematic diagram of the first container of the present invention; Figure 6It is a partial structural schematic diagram of the second container of the present invention.

[0022] Among them, 1-base, 2-rotating shaft, 20-nozzle, 21-disc, 22-expansion ring, 23-rod, 3-sleeve, 30-wastewater outlet, 4-fan blades, 5-driving member, 6-cover, 61-first cover, 62-second cover, 7-adsorption member, 71-first container, 711-first shell, 712-first built-in tube, 72-second container, 721-second shell, 722-second built-in tube, 73-third container, 731-third shell, 732-impact plate. DETAILED DESCRIPTION

[0023] The following combination Figures 1 to 6 , a detailed description of the specific embodiments of the present invention is provided. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] It should be noted that the circuit connections involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0026] Example 1 like Figure 1 The device for treating river heavy metal-contaminated sediment wastewater shown includes a base 1 , a rotating shaft 2 , a sleeve 3 , fan blades 4 , a driving member 5 , a cover 6 and an adsorption member 7 .

[0027] One end of the rotating shaft 2 is rotatably mounted on the base 1, and the other end is provided with a nozzle 20. A channel is provided within the rotating shaft 12, with the nozzle 20 communicating with one end of the channel and the other end of the channel being connected to an impact source. One end of the rotating shaft 2 with the nozzle 20 is inserted into the river sediment. The impact source impacts the sediment through the nozzle 20, causing the sediment to diffuse and mix with the river water. The impact source can be a gas source or a liquid source, with the gas source providing gas and the liquid source providing liquid. A sleeve 3 is coaxial with the rotating shaft 2 and sleeved outside the rotating shaft 2. One end of the sleeve 3 is fixed to the base 1, and the space between the other end and the rotating shaft 2 forms a wastewater inlet. A wastewater outlet 30 is defined in the sleeve 3. Fan blades 4 are mounted on the rotating shaft 2 at the wastewater inlet. A drive member 5 is connected to the rotating shaft 2 and is used to drive the rotating shaft 2 to rotate, thereby driving the fan blades 4 to rotate, so that river water carrying the sediment is drawn in through the wastewater inlet and discharged through the wastewater outlet 30. The housing 6 is fixed to the base 1. The rotating shaft 2 and sleeve 3 are located within the housing 6, forming an adsorption chamber between the housing 6 and sleeve 3. Multiple adsorbents 7 are located within the adsorption chamber. These adsorbents 7 utilize diatomaceous earth to adsorb heavy metal pollutants. The adsorbents 7 are rotatably mounted on the base 1. Multiple wastewater outlets 30 are provided, corresponding to and facing each of the adsorbents 7. The water discharged from the wastewater outlets 30 drives the adsorbents 7 to rotate. The water discharged from the wastewater outlets 30 directly impacts the adsorbents 7, causing them to rotate around the base 1, driving the diatomaceous earth inside to rotate synchronously with the adsorbents 7. The diatomaceous earth particles continuously change their relative position to the water flow during rotation, continuously exposing unsaturated adsorption surfaces. This avoids the efficiency loss caused by localized saturation during static adsorption, prolongs the single adsorption cycle, and improves the heavy metal removal rate. The adsorbents 7 are positioned at the same level as the wastewater outlets 30, ensuring that the discharged water directly impacts the rotating cross-section of the adsorbents 7. This ensures a stable and consistent driving torque, thus avoiding inefficient energy consumption. At the same time, the rotation axis of the adsorption member 7 is parallel to the rotating shaft 2 and the sleeve 3, and the overall structure is compact, which effectively improves the space utilization rate. Moreover, when the adsorption member 7 rotates, the internal diatomaceous earth is subjected to the centrifugal force and the shear force of the water flow, maintaining a loose and porous state, preventing the pores from being blocked due to long-term static accumulation, and extending the service life of the material. Moreover, the driving member 5 drives the fan blades 4 to rotate to achieve macro-scale mixing, while the adsorption member 7 passively rotates to form a micro-scale disturbance. The two enhance the turbulence of the water flow in different dimensions. The fan blades 4 can break up the bottom mud flocs and release the wrapped heavy metal ions. The rotation of the adsorption member 7 promotes the diffusion of ions into the micropores of the diatomaceous earth, forming a chain reaction of "breaking-release-adsorption". The overall processing efficiency is effectively improved compared to single stirring. In addition, when the bubbles released by the nozzle 20 rise, they collide and break with the surface of the rotating adsorption member 7, forming bubbles with smaller particle size, which effectively increases the gas-liquid mass transfer area. At the same time, the buoyancy drive of the bubbles and the impact force of the water flow act together on the adsorption member 7, further optimizing the rotation stability, especially under low flow rate conditions, it can still maintain effective rotation.

[0028] The bottom mud is impacted by a gas source or a liquid source in conjunction with the channel inside the rotating shaft 2 and the nozzle 20, and then the bottom mud is dispersed in the adsorption chamber formed by the cover body 6 and mixed with the river water above. The driving member 5 drives the rotating shaft 2 to drive the fan blades 4 to rotate, so that the river water carrying the bottom mud is sucked in from the wastewater inlet and discharged from the wastewater outlet 30, so as to disturb the water body and accelerate the water flow, thereby using the diatomaceous earth of the adsorption member 7 to adsorb heavy metal pollutants. It should be noted that: in this embodiment, a gas source is connected to the other end of the channel, and the gas source is specifically a commercially available air compression device.

[0029] The internal channel of the rotating shaft 2 introduces air into the bottom mud through the exhaust hole of the nozzle 20, which can not only impact the bottom mud, but also realize aeration treatment of the water body, forming a gas-liquid-solid three-phase mixed flow and enhancing the mass transfer effect.

[0030] The driving member 5 drives the rotating shaft 2 to drive the fan blades 4 to rotate, which not only allows the river water carrying sediment to be sucked in from the wastewater inlet and discharged from the wastewater outlet 30, thereby enhancing the water flow. In addition, the river water carrying sediment entering from the wastewater inlet can be strongly stirred to break the stratified state of the sediment wastewater, and the water containing sediment can be sucked from the wastewater inlet into the annular space between the sleeve 3 and the rotating shaft 2, and then evenly flows into the adsorption chamber through the wastewater outlet 30 on the sleeve 3, forming a vortex or turbulent flow in the chamber, thereby achieving further flow of the water body, effectively dispersing heavy metal pollutants into the water body, increasing their contact area with the adsorption material, and improving subsequent adsorption efficiency.

[0031] The adsorption element 7 uses diatomaceous earth to adsorb heavy metal pollutants. Due to the porous structure and large specific surface area of diatomaceous earth, it has strong physical adsorption and ion exchange capabilities for heavy metal pollutants and can efficiently capture heavy metal ions in water.

[0032] The entire process achieves efficient capture of heavy metal pollutants through the multi-mechanism coupling of "dynamic disturbance + aeration mixing + porous material adsorption". It has the characteristics of compact structure, low energy consumption, easy maintenance and strong environmental protection. It is particularly suitable for on-site treatment or in-situ remediation of river sediment wastewater, and has strong engineering application value and promotion potential.

[0033] Because diatomaceous earth is widely available, low-cost, and inherently non-toxic, it can be reused through regeneration after adsorption saturation or used as a raw material for solidification treatment, effectively reducing the risk of secondary contamination. Multiple adsorbents 7 are independently located within the adsorption chamber and can be easily disassembled and replaced, eliminating the need to shut down the entire system for maintenance and improving the equipment's continued operation.

[0034] This embodiment can be deployed in a river for water treatment. During use, it can be anchored at a specific location in the river using traditional anchoring methods. Once treatment is complete at that location, the treatment device can be moved to the next location in the river. Compared to traditional methods for treating riverbed sediment, which require pumping wastewater into a reactor for treatment, this embodiment offers a compact structure, low energy consumption, ease of maintenance, and strong environmental performance.

[0035] Preferably, Figure 1 、 Figure 3 、 Figure 4 As shown, the adsorbent 7 comprises a first container 71, a second container 72, and a third container 73. The first container 71 is rotatably mounted on the base 1 and has a first cavity for holding a first filtrate and a water outlet. The second container 72 has a second cavity for holding a second filtrate and a water inlet. A third container 73 is fixed to the first container 71 at one end and to the second container 72 at the other end. The third container 73 has a third cavity for holding diatomaceous earth. One end of the third cavity communicates with the first cavity, and the other end communicates with the second cavity. Water enters the second cavity from the water inlet, flows from the third cavity into the first cavity, and then exits through the water outlet. The second container 72 performs pre-filtration: water entering the second cavity's water inlet first contacts the second filtrate, removing large suspended solids, colloids, and some organic contaminants, reducing the risk of clogging. The third container 73 performs core adsorption: the diatomaceous earth in the middle layer, through its porous structure and ion exchange properties, specifically adsorbs heavy metal ions. The first container 71 provides fine filtration: the first filter material performs secondary interception on the water flow after diatomaceous earth treatment, removes the remaining fine adsorbent particles or incompletely adsorbed ionic pollutants, and ensures that the effluent water quality is more stable.

[0036] Furthermore, because diatomaceous earth is in powder form, it is easily lost during water treatment, along with the adsorbed heavy metal contaminants. Therefore, a second container 72, a third container 73, and a first container 71 are sequentially connected in series from the water inlet to the water outlet. The front and rear ends of the diatomaceous earth are blocked by the first and second filters, respectively, effectively preventing the risk of powdered diatomaceous earth loss.

[0037] In addition, the first filter material of this embodiment is a mixture of coarse sand and gravel, and the second filter material is activated carbon particles. In actual use, they can be selectively used according to actual needs. The filter material is a conventional technical means in this field and will not be described in detail here. It should be noted that the filter materials can be combined and customized according to the type of heavy metal pollution in different rivers, and the filter materials in each container can be flexibly adjusted. For example, the second container 72 can be filled with magnetic iron powder to target mercury ions or filled with sulfides to target precipitated heavy metals. In the third container 73, the diatomaceous earth can be replaced with modified diatomaceous earth loaded with iron and manganese oxides to improve the adsorption selectivity of specific heavy metals. Chelating resin can be used in the first container 71, which can deeply chelate and remove residual heavy metal ions to achieve customized treatment of "pre-precipitation-targeted adsorption-chelation capture".

[0038] Preferably, there are multiple second containers 72 evenly distributed outside the first container 71. There are multiple third containers 73, each corresponding to a corresponding third container 73, secured to the first container 71 via the third containers 73. Each second container 72 is connected to the first container 71 via the corresponding third container 73, forming a "multi-in, one-out" flow path. This ensures that water can effectively enter the second container 72 and fully contact the diatomaceous earth in the third container 73, thereby improving the adsorption efficiency of heavy metal pollutants. The diatomaceous earth in each third container 73 can be considered an independent adsorption unit. Multiple sets of third containers 73 operating in parallel effectively increase the total adsorption material loading and effective contact paths. Water enters the second container 72, is adsorbed by the diatomaceous earth in the third container 73, and then returns to the first container 71, forming a "multi-path series adsorption" system. This allows pollutants to pass through the adsorption material multiple times during flow, increasing the diatomaceous earth's adsorption saturation for heavy metals. This evenly distributed structure prevents overloading of a single channel, ensuring that each adsorption unit is uniformly loaded, reducing the risk of localized blockages and ensuring stable overall treatment capacity. In addition, the evenly distributed second container 72 and third container 73 form a symmetrical structure. When the adsorbent 7 is driven to rotate by the water flow, the impact forces of the water flow in all directions are balanced with each other, reducing the eccentric force during the rotation process, so that the adsorbent 7 can continue to rotate.

[0039] It should be noted that: in this embodiment, each second container 72 and third container 73 can be removed or replaced separately. When the diatomaceous earth in a certain unit reaches adsorption saturation, there is no need to shut down the entire device for maintenance, and only the corresponding module needs to be replaced.

[0040] Preferably, the first container 71 includes a first shell 711 and a first internal tube 712. The first shell 711 is a cylindrical structure, one end of which is rotatably mounted on the base 1. A connecting groove is provided on the side wall of the first shell 711. One end of the third container 73 is fixed to the connecting groove, and the other end is connected to the second container 72. The first internal tube 712 is coaxially arranged within the first shell 711. A first through hole is provided on the side wall of the first internal tube 712; the outer wall of the first internal tube 712 and the inner wall of the first shell 711 form a first cavity.

[0041] Preferably, the second container 72 includes a second shell 721 and a second internal tube 722. The second shell 721 is a cylindrical structure, and a second through hole is provided on the side wall of the second shell 721. The second internal tube 722 is coaxially arranged within the second shell 721 and is provided with a third through hole. The outer wall of the second internal tube 722 and the inner wall of the second shell 721 form a second cavity. One end of the third container 73 passes through the second shell 721 and is fixed to the second internal tube 722.

[0042] It should be noted that: Figure 5 、 Figure 6 As shown, the first built-in tube 712 has a reserved interface on the first shell 711, and the second built-in tube 722 has a reserved interface on the second shell 721, which can be backwashed by external backwashing equipment in the later stage. When not backwashing, the interface is sealed with a cover.

[0043] Preferably, the third container 73 includes a third shell 731 and an impact plate 732. The third shell 731 is a rectangular tubular structure, one end of which is fixed to the second inner tube 722, which passes through the second shell 721, and the other end is fixed to the connecting groove. The tubular cavity of the third shell 731 constitutes the third chamber. The impact plate 732 is an arc-shaped structure, one end of which is fixed to the third shell 731.

[0044] Preferably, Figure 2 As shown, a support portion is provided on the rotating shaft 2, comprising a disc 21 and an expansion ring 22. The disc 21 is mounted on the rotating shaft 2, located near the nozzle 20. The expansion ring 22 is sleeved onto the outside of the disc 21 and connected to the disc 21 via a plurality of rods 23. Since the nozzle 20 needs to be inserted into the bottom mud, the support portion increases the force-bearing surface. In actual use, the support portion is laid on the bottom mud surface to prevent the nozzle 20 from being inserted too deeply into the mud, which would prevent it from effectively impacting the mud and dispersing it into the water.

[0045] Preferably, the treatment device further includes a negative pressure element connected to the water outlet for providing negative pressure to the water outlet. The negative pressure element effectively ensures the flow of water within the containers of the adsorption element 7, accelerating the flow of water. In this embodiment, the negative pressure element utilizes a commercially available negative pressure pump.

[0046] Preferably, the cover body 6 is a telescopic structure, and the cover body 6 includes a first cover body 61 and a second cover body 62. The first cover body 61 is a tubular structure, which is arranged at the lower end of the base 1. A placement cavity is provided on the inner wall of the first cover body 61, and a telescopic member is provided on the outer wall of the first cover body 61. The second cover body 62 is a tubular structure, one end of which is slidably arranged in the placement cavity, and the other end is fixed to the telescopic end of the telescopic member. The telescopic member drives the second cover body 62 to slide in the placement cavity of the first cover body 61, thereby realizing dynamic adjustment of the total height of the cover body, which can adapt to river channels with different water levels and different terrain changes in the river channel. The telescopic member of this embodiment adopts a commercially available hydraulic telescopic rod.

[0047] Working principle of the present invention: One end of the nozzle 20 provided on the rotating shaft 2 is inserted into the riverbed mud, and the gas source delivers gas to the internal channel of the rotating shaft 2. The gas is released through the exhaust hole of the nozzle 20, impacting the mud, causing the mud to diffuse and mix with the river water. It should be noted that the depth to which the nozzle 20 is inserted into the riverbed mud is not limited, because when the nozzle 20 is initially used, it only needs to be inserted into the surface layer of the riverbed mud. As the riverbed mud is continuously impacted, the device can be gradually moved downward. In addition, the exhaust hole on the nozzle 20 can also be set vertically downward. In this way, even if the device is not moved downward later, the gas ejected from the nozzle 20 can still effectively impact the mud below the nozzle 20.

[0048] The driving member 5 starts and drives the rotating shaft 2 to rotate, and the fan blades 4 fixed on the rotating shaft rotate synchronously. The fan blades 4 are located at the wastewater inlet and through mechanical rotation, the water containing bottom mud is sucked from the wastewater inlet into the annular space between the sleeve 3 and the rotating shaft 2.

[0049] The sucked wastewater flows in the annular space between the sleeve 3 and the rotating shaft 2, is discharged through the wastewater outlet 30 on the sleeve 3, and enters the adsorption chamber. The heavy metal pollutants are adsorbed by the diatomaceous earth placed inside the adsorption element 7. The diatomaceous earth fixes the heavy metal pollutants in the wastewater in its own structure through surface adsorption, microporous interception and chemical functional group combination, thereby realizing the transfer of pollutants from the water phase to the solid phase.

[0050] Example 2 Unlike Example 1, this embodiment uses a liquid source connected to the other end of the channel. The liquid source is specifically a commercially available water pump. The water inlet of the water pump is located in the river water in the river channel outside the cover body 6, and the water outlet of the water pump is connected to the channel. The water pump is used to pump the river water in the river channel outside the cover body 6 into the channel.

[0051] The specific models of the above electronic components are not particularly specified, and common products available on the market can be selected as long as they can meet the use requirements of the present invention.

[0052] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A device for treating river heavy metal contaminated sediment wastewater, characterized in that: include: matrix; A rotating shaft, one end of which is rotatably mounted on a base, and a nozzle is disposed at the other end. A channel is disposed within the rotating shaft, the nozzle is connected to one end of the channel, and the other end of the channel is used to connect to an impact source. One end of the rotating shaft with the nozzle is used to be inserted into river sediment, and the impact source impacts the sediment through the nozzle, causing the sediment to spread and mix with river water. The impact source is a gas source or a liquid source. The sleeve is coaxial with the rotating shaft and sleeved on the outside of the rotating shaft. One end of the sleeve is fixed on the base body, and the other end and the rotating shaft form a wastewater inlet. The sleeve is provided with a wastewater outlet. The fan blades are arranged on the rotating shaft at the wastewater inlet; A driving member connected to the rotating shaft, used to drive the rotating shaft to rotate so as to drive the fan blades to rotate, so that the river water carrying the bottom mud is sucked in from the wastewater inlet and discharged from the wastewater outlet; The cover body is fixed to the base body, the rotating shaft and the sleeve are located in the cover body, and an adsorption chamber is formed between the cover body and the sleeve; There are multiple adsorption components, all of which are located in the adsorption chamber. The adsorption components use diatomaceous earth to adsorb heavy metal pollutants. The adsorption components are rotatably arranged on the base. There are multiple wastewater outlets, and the multiple wastewater outlets correspond to and are opposite to the multiple adsorption components one by one. The water flow discharged from the wastewater outlet drives the adsorption components to rotate.

2. A river heavy metal contaminated sediment wastewater treatment device according to claim 1, characterized in that: The adsorption member includes: A first container is rotatably mounted on the base, and has a first cavity for accommodating a first filter material, and has a water outlet; A second container has a second cavity, the second cavity is used to place a second filter material, and the second cavity has a water inlet; The third container has one end fixed on the first container and the other end fixed on the second container. The third container has a third cavity, and the third cavity is used to place the diatomaceous earth. One end of the third cavity is connected to the first cavity, and the other end of the third cavity is connected to the second cavity. Water flows into the second cavity from the water inlet, flows into the first cavity from the third cavity, and then flows out from the water outlet.

3. A river heavy metal contaminated sediment wastewater treatment device according to claim 2, characterized in that: There are multiple second containers, which are evenly distributed outside the first container. There are multiple third containers, which correspond one-to-one to the multiple third containers and are fixed to the first container through the third containers.

4. A river heavy metal contaminated sediment wastewater treatment device according to claim 2, characterized in that: The first container comprises: The first shell is a cylindrical structure, one end of which is rotatably mounted on the base. A connecting groove is provided on the side wall of the first shell. One end of the third container is fixed to the connecting groove, and the other end is connected to the second container. The first inner tube is coaxially arranged in the first shell, and a first through hole is arranged on the side wall of the first inner tube; the outer wall of the first inner tube and the inner wall of the first shell form the first cavity.

5. A river heavy metal contaminated sediment wastewater treatment device according to claim 4, characterized in that: The second container comprises: The second shell is a columnar structure, and a second through hole is provided on the side wall of the second shell; The second inner tube is coaxially arranged in the second shell, and a third through hole is provided on the second inner tube; the outer wall of the second inner tube and the inner wall of the second shell constitute the second cavity; one end of the third container passes through the second shell and is fixed on the second inner tube.

6. A river heavy metal contaminated sediment wastewater treatment device according to claim 5, characterized in that: The third container comprises: The third shell is a rectangular tubular structure, one end of which is fixed to the second internal tube passing through the second shell, and the other end is fixed to the connecting groove; the tube cavity of the third shell constitutes the third cavity; The impact plate is an arc-shaped structure, one end of which is fixed on the third shell.

7. The device for treating river heavy metal contaminated sediment wastewater according to claim 1, characterized in that: The rotating shaft is provided with a support portion, and the support portion includes: The disc body is arranged on the rotating shaft and is located at one end close to the nozzle; The diameter expansion ring is sleeved on the outer side of the disc body, and the diameter expansion ring and the disc body are connected through a plurality of rods.

8. The device for treating river heavy metal contaminated sediment wastewater according to claim 2, characterized in that: It also includes a negative pressure piece, which is connected to the water outlet and is used to provide negative pressure to the water outlet.

9. The device for treating river heavy metal contaminated sediment wastewater according to claim 1, characterized in that: The cover body is a telescopic structure, and the cover body includes: The first cover body is a tubular structure and is arranged at the lower end of the base body. The inner wall of the first cover body is provided with a placement cavity, and the outer wall of the first cover body is provided with a telescopic member; The second cover body is a tubular structure, one end of which is slidably arranged in the placement cavity, and the other end is fixed to the telescopic end of the telescopic member.

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