An adsorption treatment device for adsorbing heavy metals in wastewater

Abstract

This invention discloses an adsorption treatment device for adsorbing heavy metals from wastewater, comprising a barrel, a cover, and an adsorption filtration unit. The cover is sealed at the top opening of the barrel. An inlet communicating with the barrel is located on the edge of the cover, and an outlet is located on the bottom side wall of the barrel. The adsorption filtration unit is cylindrical and vertically arranged around the barrel, with an annular gap formed between the outer wall of the adsorption filtration unit and the inner wall of the barrel. The outlet communicates with the annular gap. A geared motor is located above the center of the cover and is fixed to the cover by a motor bracket. A rotating shaft is inserted through the center of the adsorption filtration unit along its axial direction. This invention enables rapid filtration and adsorption of heavy metals from wastewater, and allows for rapid replacement of the adsorption filtration unit.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and in particular relates to an adsorption treatment device for adsorbing heavy metals in wastewater. Background Art

[0002] Heavy metal wastewater refers to wastewater containing heavy metals discharged from industrial production processes such as mining, machinery manufacturing, chemical industry, electronics, and instrumentation. Heavy metal wastewater (such as cadmium, nickel, mercury, zinc, etc.) is one of the industrial wastewaters that pollutes the environment the most and poses the greatest harm to humans. Its water quality and quantity are related to the production process. Heavy metal treatment can recycle heavy metals in water bodies and optimize water quality, which can reduce pollution to the environment. The wastewater heavy metal treatment device in the prior art usually uses plate-type adsorption materials to filter and adsorb heavy metals. The wastewater is allowed to stand still in the device for adsorption, and the adsorption effect is poor. The adsorption material of the prior art solution is usually fixed inside the device, and the fixing method is usually bolted, which is more troublesome to replace. The structure of its treatment device is complex and the treatment efficiency is low. In the actual wastewater treatment process, multiple treatment equipment needs to be set up to assist in the treatment. Not only is the operation cumbersome, but it also occupies a large area and has certain limitations in use. Summary of the Invention

[0003] The present invention aims to provide an adsorption treatment device for adsorbing heavy metals in wastewater. The present invention can rapidly filter wastewater and adsorb heavy metals in wastewater, and the adsorption and filtration unit can be quickly replaced. To achieve the above objectives, the present invention employs the following technical effects:

[0004] According to one aspect of the present invention, an adsorption treatment device for adsorbing heavy metals in wastewater is provided, wherein the adsorption treatment device comprises a barrel body, a cover body and an adsorption filter unit, wherein the cover body is sealed and fastened to the top opening of the barrel body, a water inlet connected to the barrel body is provided on the surface edge of the cover body, and a water outlet is provided on the bottom side wall of the barrel body, the adsorption filter unit is vertically arranged in a cylindrical shape in the barrel body, an annular gap is formed between the outer wall of the adsorption filter unit and the inner wall of the barrel body, and the water outlet is connected to the annular gap.

[0005] The above scheme is further preferred, wherein the adsorption filtration unit includes an inner cylindrical filter screen, a heavy metal adsorption layer and an outer cylindrical filter screen, the inner cylindrical filter screen and the outer cylindrical filter screen are vertically coaxially arranged in the barrel body, the heavy metal adsorption layer is filled between the inner cylindrical filter screen and the outer cylindrical filter screen, the lower surface of the cover body is in close contact with the top opening edge of the barrel body and the surface of the upper annular fixed shell respectively, the upper end of the inner cylindrical filter screen and the upper end of the outer cylindrical filter screen are fixedly connected by an upper annular edge guard net, and the lower end of the inner cylindrical filter screen and the lower end of the outer cylindrical filter screen are fixedly connected by a lower annular edge guard net.

[0006] The above solution is further preferred, wherein the heavy metal adsorption layer is an activated carbon particle layer, and the particle size of the activated carbon particle layer is 550μm-700μm; the particle size of the activated carbon particle layer is larger than the pore size of the inner cylindrical filter mesh and the pore size of the outer cylindrical filter mesh.

[0007] The above solution is further preferred in that a limiting support is provided at the bottom of the barrel body for fixing and supporting the inner cylindrical filter screen and the outer cylindrical filter screen, and the annular recessed socket at the center of the lower surface of the lower circular edge guard net is inserted into the limiting support.

[0008] The above scheme is further preferred, that the limiting support member includes a circular ring limiting support base, and a plurality of circular limiting plates are concentrically arranged on the surface edge of the circular ring limiting support base toward the center, and annular grooves are formed between adjacent annular limiting plates, and the annular limiting plates are embedded in the annular recessed socket in the center of the lower surface of the lower circular ring-shaped edge guard net, and the lower end of the inner cylindrical filter screen and the lower end of the outer cylindrical filter screen are respectively inserted into the annular grooves on both sides of the annular recessed socket.

[0009] The above solution is further preferred in that a water-passing gap is provided on each annular limiting plate, and the center of the water-passing gap is on the same radial line as the center of the water outlet on the side wall of the bottom end of the barrel body.

[0010] The above scheme is further preferred, in which multiple water-passing gaps are opened on each annular limiting plate, so that each annular limiting plate forms a continuous arc segment arranged on the surface of the circular limiting support base, wherein at least one water-passing gap is on the same radial line as the center of the water outlet of the bottom side wall of the barrel body.

[0011] The above scheme is further preferred in that a reduction motor is arranged above the center of the cover body, and the reduction motor is fixed to the cover body through a motor bracket. A rotating shaft is arranged along the axis through the center of the inner cylindrical filter screen, and the lower end of the rotating shaft is rotatably connected to the bottom of the barrel body. The outer wall of the upper end of the rotating shaft is nested in the center of the cover body through a double bearing seat, and the output shaft of the reduction motor is transmission-connected to the upper end of the rotating shaft, and multiple layers of asymmetric stirring rods are horizontally spaced from top to bottom on the rotating shaft.

[0012] The above scheme is further preferred in that a buckle is provided on the outer side wall of the top end of the barrel body, the side wall of the cover body is connected to the barrel body through the buckle, and a plurality of fixed support angle irons are provided on the outer side walls around the bottom end of the barrel body, and fixing bolts are provided on the support angle irons.

[0013] The above solution is further preferred in that handles are respectively provided on the cover body and on both sides of the motor bracket, and the fixed end of the reduction motor is mounted on the motor bracket via a fixing plate.

[0014] The above scheme is further preferred, in which a cylindrical central adsorption structure is concentrically arranged between the inner cylindrical filter screen and the free end of the stirring rod, and the thickness of the central adsorption structure is less than the thickness of the heavy metal adsorption layer; the central adsorption layer is composed of an inner central filter screen, an outer central filter screen and a central adsorption layer, and the central adsorption layer is coated with cellulose adsorption particles of 700μm-2000μm; the particle size of the central adsorption layer is larger than the pore size of the inner central filter screen and the pore size of the outer central filter screen.

[0015] The above solution is further preferred, wherein the cellulose adsorption particles are prepared from nano-zeolite particles, nano-tobacco cellulose, hydroxyethyl cellulose and a cross-linking agent in a mass ratio of 4-8:2:1:0.3-0.6.

[0016] The invention adopts the above technical solution, and the invention has the following technical effects:

[0017] The present invention can quickly filter wastewater and quickly adsorb heavy metals in the wastewater, and the adsorption filter unit can be quickly replaced. The adsorption layer used in the double-layer filter screen of the adsorption filter unit has a large adsorption capacity, high efficiency, and simple operation. The adsorption layer is easy to replace and can be regenerated and recycled, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an adsorption treatment device invented for adsorbing heavy metals in wastewater;

[0019] Figure 2 It is a front view of an invented adsorption treatment device for adsorbing heavy metals in wastewater;

[0020] Figure 3 The present invention Figure 2 AA sectional view;

[0021] Figure 4 This is a schematic diagram of the structure of the explosive heavy metal adsorption layer of the electric drawer of the present invention;

[0022] Figure 5 1 is a schematic structural diagram of a first embodiment of a position-limiting support member of the present invention;

[0023] Figure 6 2 is a schematic structural diagram of a second embodiment of a position-limiting support member of the present invention;

[0024] Figure 7 This is a schematic structural diagram of another embodiment of an adsorption treatment device for adsorbing heavy metals in wastewater according to the present invention;

[0025] Figure 8 Schematic diagram of the central adsorption structure of the present invention;

[0026] In the accompanying drawings, there are a barrel body 1, a cover body 2, an adsorption filter unit 3, a water inlet 4, a water outlet 5, a reduction motor 6, a handle 7, a fixing plate 8, a pull buckle 9, a supporting angle iron 10, a fixing bolt 11, a central adsorption structure 12, an annular gap 30, an inner cylindrical filter screen 31, a heavy metal adsorption layer 32, an outer cylindrical filter screen 33, an upper circular ring-shaped edge guard screen 34, a lower circular ring-shaped edge guard screen 35, an annular recessed socket 35a, a motor bracket 60, a rotating shaft 61, a double bearing seat 62, a stirring stick 63, a limiting support 100, a circular ring-shaped limiting support base 101, an annular limiting plate 102, an annular groove 103, a water-passing gap 104, an inner center filter screen 120, an outer center filter screen 121, and a central adsorption layer 122. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the invention more clearly understood, the invention is further described below with reference to the accompanying drawings and by way of preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help the reader gain a thorough understanding of one or more aspects of the invention, and that these aspects of the invention can be practiced even without these specific details.

[0028] like Figure 1 、 Figure 2 and Figure 3As shown, according to the invention, an adsorption treatment device for adsorbing heavy metals in wastewater, the adsorption treatment device includes a barrel body 1, a cover body 2 and an adsorption filter unit 3, the top opening of the barrel body 1 is sealed and buckled with the cover body 2, a water inlet 4 connected to the barrel body 1 is provided on the surface edge of the cover body 2, and a water outlet 5 is provided on the side wall of the bottom end of the barrel body 1, the adsorption filter unit 3 is vertically arranged in the barrel body 1 in a cylindrical shape, an annular gap 30 is formed between the outer wall of the adsorption filter unit 3 and the inner wall of the barrel body 1, and the water outlet 5 is connected to the annular gap 30, a buckle 9 is provided on the outer wall of the top end of the barrel body 1, and the side wall of the cover body 2 is connected to the barrel body 1 through the buckle 9, and a plurality of fixed support angle irons 10 are provided on the outer wall around the bottom end of the barrel body 1, and fixing bolts 11 are provided on the support angle irons 10. In the present invention, The barrel body 1 is fixed in the installation position by supporting angle irons 10 and fixing bolts, and the wastewater enters the space surrounded by the adsorption filter unit 3 in the barrel body 1 through the water inlet 4. After the wastewater enters the barrel body 1, the wastewater quickly reacts with the adsorption filter unit 3, so that the adsorption filter unit 3 quickly adsorbs the heavy metals in the wastewater. After a period of reaction and adsorption, the wastewater flows through the annular gap 30 to the water outlet 5 for discharge, completing the purification process, increasing the contact area between the wastewater and the adsorption filter unit 3, and thus increasing the adsorption efficiency, solving the problem of low adsorption efficiency in the prior art. When the adsorption filter unit 3 needs to be replaced, open the pull buckle 9, then remove the lid, and then take out the adsorption filter unit 3 from the barrel body 1 and replace it, thereby solving the problem of inconvenience in replacing the adsorption filter unit 3 in the prior art.

[0029] As the best embodiment of the present invention, a reduction motor 6 is arranged above the center of the cover body 2, and the reduction motor 6 is fixed to the cover body 2 through a motor bracket 60. A rotating shaft 61 is arranged along the axis through the center of the inner cylindrical filter screen 31, and the lower end of the rotating shaft 61 is rotatably connected to the bottom of the barrel body 1. The outer wall of the upper end of the rotating shaft 61 is nested in the center of the cover body 2 through a double bearing seat 62. The output shaft of the reduction motor 6 is transmission-connected to the upper end of the rotating shaft 61, and multiple layers of asymmetric stirring rods 63 are horizontally spaced from top to bottom on the rotating shaft 61. Each stirring rod 63 is horizontally inserted into the rotating shaft 61 in multiple layers, and each stirring rod 63 is staggered on the rotating shaft 61 in an asymmetric form; handles 7 are respectively provided on the cover body 2 and on both sides of the motor bracket 60, and the fixed end of the reduction motor 6 is mounted on the motor bracket 60 through a fixing plate 8. When wastewater enters the barrel 1, it rapidly reacts with the adsorption filter unit 3, causing the adsorption filter unit 3 to rapidly adsorb heavy metals in the wastewater. After a period of reaction and adsorption, the wastewater flows through the annular gap 30 to the outlet 5 for discharge, completing the purification process. This increases the contact area between the wastewater and the adsorption filter unit 3, thereby increasing the adsorption efficiency and solving the problem of low adsorption efficiency in the prior art. When the adsorption filter unit 3 needs to be replaced, the pull tab 9 is opened, the lid can be removed, and the adsorption filter unit 3 can be removed from the barrel 1 and replaced. This solves the problem of inconvenience in replacing the adsorption filter unit 3 in the prior art. After the wastewater enters the barrel, the reduction motor 6 drives the rotating shaft 61 to rotate, which in turn drives the stirring rod 63 to rotate and stir the wastewater. The stirred wastewater rapidly reacts with the adsorption filter unit 3, causing the adsorption filter unit 3 to rapidly adsorb heavy metals in the wastewater. After adsorption is completed, when the adsorption filter unit 3 needs to be replaced, the pull tab 9 is opened, the lid 2 is removed via the handle 7, and the adsorption filter unit 3 can be removed and replaced.

[0030] In the best embodiment of the present invention, the adsorption filter unit 3 includes an inner cylindrical filter screen 31, a heavy metal adsorption layer 32 and an outer cylindrical filter screen 33, the inner cylindrical filter screen 31 and the outer cylindrical filter screen 33 are vertically coaxially arranged in the barrel body 1, and the heavy metal adsorption layer 32 is filled between the inner cylindrical filter screen 31 and the outer cylindrical filter screen 33, the lower surface of the cover body 2 is in close contact with the top opening edge of the barrel body 1 and the surface of the upper annular fixed shell 34, the upper end of the inner cylindrical filter screen 31 and the upper end of the outer cylindrical filter screen 33 are fixedly connected by the upper annular edge guard net 34, and the lower end of the inner cylindrical filter screen 31 and the lower end of the outer cylindrical filter screen 33 are fixedly connected by the lower annular edge guard net 35, and the upper annular edge guard net 34 and the lower annular edge guard net 35 are fixedly connected to the filter screen by bolts, welding or steel wire to form an integral cylindrical filter screen. In an embodiment of the present invention, in the present invention, the heavy metals in the wastewater include at least one or more of the metal ions mercury (Hg), lead (Pb), nickel (Ni), copper (Cu), iron (Fe), zinc (Zn), vanadium (V), cobalt (Co), cadmium (Cd) and silver (Ag), and the heavy metal adsorption layer 32 is activated carbon particles, the activated carbon particles have a particle size of 550μm-700μm, and the particles not only have tiny pores to filter out and adsorb ions and other impurities in the wastewater; the particle size of the activated carbon particles is larger than the pore size of the inner cylindrical filter 31 and the pore size of the outer cylindrical filter 33.

[0031] In an embodiment of the present invention, a limiting support 100 is provided at the bottom of the barrel body 1 for fixing and supporting the inner cylindrical filter screen 31 and the outer cylindrical filter screen 33, and the annular recessed socket 35a at the center of the lower surface of the lower circular ring-shaped edge protection net 35 is inserted into the limiting support 100; the limiting support 100 includes a circular ring-shaped limiting support base 101, and a plurality of annular limiting plates 102 are concentrically arranged on the surface edge of the circular ring-shaped limiting support base 101 toward the center, and annular grooves 103 are formed between adjacent annular limiting plates 102, and the annular limiting plates 102 are embedded in the annular recessed socket 35a at the center of the lower surface of the lower circular ring-shaped edge protection net 35, and the lower end of the inner cylindrical filter screen 31 and the outer cylindrical filter screen 33 are fixed to each other. The lower ends of the filter screens 33 are respectively inserted into the annular grooves 103 on both sides of the annular recessed socket 35a, and a water-passing notch 104 is opened on each annular limiting plate 102. The center of the water-passing notch 104 is on the same radial line as the center of the water outlet 5 on the side wall of the bottom end of the barrel body 1. The filtered wastewater is buffered by the annular gap 30 and discharged through the water outlet 5. By setting the water-passing notch, the retention and obstruction of the filtered wastewater by the limiting plate in the annular limiting support base 101 can be effectively reduced; the upper and lower ends of the inner cylindrical filter screen 31 and the upper and lower ends of the outer cylindrical filter screen 33 are respectively connected to form a whole through corresponding edge guard nets, and a buffer rubber pad (not shown) is provided on the inner surface of the cover body 2, and the inner wall of the cover body 2 is buffered by the buffer rubber pad. The cylindrical filter screen 31, the outer cylindrical filter screen 33 and the annular limiting support base 101 are compacted on the bottom of the barrel body 1. At this time, the lower end of the inner cylindrical filter screen 31 and the lower end of the outer cylindrical filter screen 33 are plugged into the annular limiting plate 102 through the annular recessed socket 35a on the bottom surface of the lower annular edge guard 35, and the parts on both sides of the annular recessed socket 35a are inserted into the annular groove 103. Then, the lower annular edge guard 35 and the annular limiting plate 102 are fixed to the annular limiting plate 102 by bolts. The width between the inner cylindrical filter screen 31 and the outer cylindrical filter screen 33 is 10cm-30cm, preferably 15cm-25cm; the width of the annular gap 30 between the outer cylindrical filter screen 33 and the inner wall of the barrel body 1 is 10cm-30cm. It is 10cm-25cm, preferably 10cm-15cm; it not only ensures that after the wastewater is adsorbed and filtered by the adsorption filtration unit 3, there is enough space for the wastewater to be buffered in the annular gap 30, and then the wastewater is discharged through the outlet 5. After the lower circular ring-shaped edge guard 35 is connected to the annular limit plate 102 by bolts, the mouth of the barrel body 1 is covered with the cover body 2. At this time, the barrel body 1 compacts the top of the inner cylindrical filter screen 31 and the outer cylindrical filter screen 33, so that the inner cylindrical filter screen 31, the heavy metal adsorption layer 32 and the outer cylindrical filter screen 33 are integrally installed and fixed on the limit support 100, which can effectively prevent the inner cylindrical filter screen 31, the outer cylindrical filter screen 33 and the limit support 100 from moving in the barrel body 1.

[0032] As another embodiment of the present invention, a plurality of water-passing notches 104 are provided on each annular limiting plate 102, so that each annular limiting plate 102 forms a continuous arc segment arranged on the surface of the circular ring limiting support base 101, wherein at least one water-passing notch 104 is on the same radial line as the center of the water outlet 5 on the side wall at the bottom end of the barrel body 1, so that the filtered water can quickly flow into the annular gap 30 and be discharged through the water outlet.

[0033] As another embodiment of the present invention, Figure 7 and Figure 8 As shown, a cylindrical central adsorption structure 12 is concentrically arranged between the inner cylindrical filter 31 and the free end of the stirring rod 63. The thickness of the central adsorption structure 12 is less than the thickness of the heavy metal adsorption layer. The central adsorption structure 12 is composed of an inner central filter 120, an outer central filter 121 and a central adsorption layer 122. The central adsorption layer 122 is coated in the gap between the inner central filter 120 and the outer central filter 121. The upper and lower ends of the inner central filter 120 and the upper and lower ends of the outer central filter 121 are respectively connected to the inner side wall of the upper annular fixed shell 34 and the inner side wall of the lower annular edge guard net 35. The central adsorption layer 122 is cellulose adsorption particles of 700μm-2000μm; the particle size of the central adsorption layer 122 is larger than the pore size of the inner central filter 120 and the pore size of the outer central filter 121, and the cellulose adsorption particles are composed of a mass ratio of 4 -8:2:1:0.3-0.6 nano zeolite particles, nano tobacco cellulose, hydroxyethyl cellulose and a cross-linking agent. The nano tobacco cellulose material has a large pore size, a high porosity and a relatively stable structure. It has an excellent adsorption effect on heavy metals in wastewater, which can not only reduce the cost of heavy metal ion treatment in wastewater. In the present invention, the preparation process of the cellulose adsorption particles is to sequentially put nano zeolite particles (50nm-200nm), nano tobacco cellulose (100nm-300nm), hydroxyethyl cellulose and a cross-linking agent into a cavity of inert gas, and stir them by high-speed centrifugation at 4000r / min-6000r / min for 0.5-1.5h, then keep them warm at 70-80℃ for 5-10h, and then granulate them to obtain cellulose adsorption particles of 800μm-2000μm, and then dry them with cold air under a vacuum environment of 2-10℃ to obtain the final product. The wastewater entering the barrel body 1 through the water inlet 4 is sent to the inner central filter 120 of the central adsorption structure 12 to filter out larger particles of impurities and preliminarily adsorb heavy metal ions. Zeolite has a large number of orderly micropores, which have the functions of filtering, adsorbing, purifying and deodorizing. Its surface adsorption effect, such as surface chemical composition, can filter and adsorb metal ions and other suspended impurities in the wastewater.

[0034] The above is only a preferred embodiment of the invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the invention. These improvements and modifications should also be regarded as within the scope of protection of the invention.

Claims

1. An adsorption treatment device for adsorbing heavy metals in wastewater, characterized in that: The adsorption treatment equipment comprises a barrel body, a cover body and an adsorption filter unit, the top opening of the barrel body is sealed and buckled with the cover body, the bottom side wall of the barrel body is provided with a water outlet, the adsorption filter unit is cylindrical and vertically arranged in the barrel body, a water inlet connected to the space surrounded by the adsorption filter unit in the barrel body is provided on the surface edge of the cover body, an annular gap is formed between the outer wall of the adsorption filter unit and the inner wall of the barrel body, the water outlet is connected with the annular gap, a reduction motor is provided above the center of the cover body, the reduction motor is fixed to the cover body through a motor bracket, a rotating shaft is provided through the center of the adsorption filter unit along the axial direction, the lower end of the rotating shaft is rotatably connected to the bottom of the barrel body, the outer wall of the upper end of the rotating shaft is nested in the center of the cover body through a double bearing seat, the output shaft of the reduction motor is transmission-connected to the upper end of the rotating shaft, and multiple layers of asymmetric stirring rods are horizontally spaced from top to bottom on the rotating shaft; The adsorption filtration unit comprises an inner cylindrical filter, a heavy metal adsorption layer and an outer cylindrical filter, wherein the inner cylindrical filter and the outer cylindrical filter are arranged vertically and coaxially in the barrel body, and the heavy metal adsorption layer is filled between the inner cylindrical filter and the outer cylindrical filter, and the lower surface of the cover body is in close contact with the top opening edge of the barrel body and the surface of the upper annular fixed shell, respectively, and the upper end of the inner cylindrical filter and the upper end of the outer cylindrical filter are fixedly connected by the upper annular edge protection net, and the lower end of the inner cylindrical filter and the lower end of the outer cylindrical filter are respectively connected. It is fixedly connected through a lower circular ring-shaped edge protection net; a limiting support for fixedly supporting the inner cylindrical filter net and the outer cylindrical filter net is arranged at the bottom of the barrel body, and the annular recessed socket at the center of the lower surface of the lower circular ring-shaped edge protection net is inserted into the limiting support; the limiting support comprises a circular ring-shaped limiting support base, and a plurality of annular limiting plates are concentrically arranged at the surface edge of the circular ring-shaped limiting support base toward the center, and annular grooves are formed between adjacent annular limiting plates, and the annular limiting plates are embedded and inserted into the annular recessed socket at the center of the lower surface of the lower circular ring-shaped edge protection net; A cylindrical central adsorption structure is concentrically arranged between the inner cylindrical filter and the free end of the stirring rod, and the thickness of the central adsorption structure is less than the thickness of the heavy metal adsorption layer; the central adsorption structure is composed of an inner central filter, an outer central filter and a central adsorption layer, and the central adsorption layer is coated in the gap between the inner central filter and the outer central filter, and the central adsorption layer is cellulose adsorption particles of 700μm-2000μm; the particle size of the central adsorption layer is larger than the pore size of the inner central filter and the pore size of the outer central filter; the cellulose adsorption particles are nano zeolite with a mass ratio of 4-8:2:1:0.3-0.6 The cellulose adsorption particles are prepared by mixing nano-cigarette cellulose, hydroxyethyl cellulose and a cross-linking agent. The preparation process of the cellulose adsorption particles is as follows: nano-zeolite particles of 50nm-200nm, nano-cigarette cellulose of 100nm-300nm, hydroxyethyl cellulose and a cross-linking agent are sequentially added into a cavity of an inert gas, and high-speed centrifugal stirring is performed for 0.5-1.5h under the condition of 4000r / min-6000r / min, and then the mixture is kept warm at 70-80℃ for 5-10h, and then granulation is performed to obtain cellulose adsorption particles of 800μm-2000μm, and then cold air drying is performed under a vacuum environment of 2-10℃ to obtain the final product.

2. The adsorption treatment equipment for adsorbing heavy metals in wastewater according to claim 1, characterized in that: The heavy metal adsorption layer is an activated carbon particle layer, and the particle size of the activated carbon particle layer is 550μm-700μm; the particle size of the activated carbon particle layer is larger than the pore size of the inner cylindrical filter mesh and the pore size of the outer cylindrical filter mesh.

3. The adsorption treatment equipment for adsorbing heavy metals in wastewater according to claim 1, characterized in that: The lower end of the inner cylindrical filter screen and the lower end of the outer cylindrical filter screen are respectively plugged into the annular grooves on both sides of the annular recessed socket.

4. The adsorption treatment equipment for adsorbing heavy metals in wastewater according to claim 3, characterized in that: A water-passing notch is provided on each annular limiting plate, and the center of the water-passing notch is on the same radial line as the center of the water outlet on the side wall at the bottom end of the barrel body.

5. The adsorption treatment equipment for adsorbing heavy metals in wastewater according to claim 3, characterized in that: A plurality of water-passing notches are provided on each annular limiting plate, so that each annular limiting plate forms a continuous arc segment arranged on the surface of the circular limiting supporting base, wherein at least one water-passing notch is on the same radial line as the center of the water outlet of the side wall at the bottom end of the barrel body.

6. The adsorption treatment equipment for adsorbing heavy metals in wastewater according to claim 1, characterized in that: A draw buckle is arranged on the outer wall at the top end of the barrel body, and the side wall of the cover body is connected to the barrel body through the draw buckle. A plurality of fixed support angle irons are arranged on the outer walls around the bottom end of the barrel body, and fixing bolts are arranged on the support angle irons. Handles are respectively arranged on the cover body and on both sides of the motor bracket. The fixed end of the reduction motor is installed on the motor bracket through a fixing plate.

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