Attapulgite-based composite adsorbent wastewater purification device

Abstract

The invention is suitable for the technical field of sewage treatment, and provides an attapulgite-based composite adsorbent wastewater purification device. Comprising a pretreatment unit which comprises a pretreatment box body and a filtering assembly which is installed on the pretreatment box body and has a self-cleaning function; the multi-stage adsorption unit comprises a multi-stage adsorption box body, at least two groups of detachably arranged adsorption modules are arranged in the multi-stage adsorption box body along the water flow direction, and the adsorption modules are filled with modified attapulgite-based composite adsorbents; the conveying part is arranged between the pretreatment unit and the multi-stage adsorption unit and is used for conveying the wastewater pretreated by the pretreatment unit into the multi-stage adsorption unit. According to the invention, a modified attapulgite-based composite adsorbent is combined with a multi-stage modular adsorption structure, and the adjacent adsorption modules adopt composite adsorbents with different modified components, so that various pollutants such as heavy metal ions and organic dyes are synergistically and efficiently removed.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater purification device using an attapulgite-based composite adsorbent. Background Technology

[0002] Industrial wastewater (such as electroplating wastewater, dyeing and printing wastewater, and chemical wastewater) has a complex composition, often containing multiple pollutants including heavy metal ions, organic dyes, and suspended particulate matter. Direct discharge of such wastewater can severely pollute aquatic ecosystems and threaten human health. Adsorption methods are widely used in wastewater purification due to their ease of operation, relatively low cost, and wide applicability. Among these methods, attapulgite-based adsorbents have become a research hotspot due to their abundant raw material reserves and excellent adsorption performance.

[0003] However, existing wastewater purification devices based on attapulgite still have many technical defects and cannot meet the high-efficiency purification needs of complex industrial wastewater: existing devices mostly adopt a single adsorption unit design, which is filled with a single-component attapulgite adsorbent. It can only remove a certain type of pollutant, and the treatment effect on complex wastewater with multiple components is poor, and the effluent is difficult to meet the standards. In order to address the shortcomings of the above-mentioned existing technologies, an attapulgite-based composite adsorbent wastewater purification device is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a wastewater purification device based on attapulgite composite adsorbent to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A wastewater purification device based on attapulgite composite adsorbent includes: a pretreatment unit, which includes a pretreatment box and a filter assembly with self-cleaning function installed on the pretreatment box; The multi-stage adsorption unit includes a multi-stage adsorption box. Inside the multi-stage adsorption box, at least two sets of detachable adsorption modules are arranged along the water flow direction. The adsorption modules are filled with modified attapulgite-based composite adsorbent. And a conveying component is provided between the pretreatment unit and the multi-stage adsorption unit, which is used to input the wastewater after pretreatment by the pretreatment unit into the multi-stage adsorption unit.

[0006] As a further embodiment of the present invention: the filter assembly includes a pretreatment box with a water filtration chamber inside. A rotating barrel is rotatably arranged inside the pretreatment box. A plurality of through grooves are arranged in an array on the outer side of the rotating barrel. An installation groove is also provided between adjacent through grooves. A dividing plate is slidably arranged in the installation groove. The dividing plate is elastically slidably arranged in a supporting rotating shaft, and the end of the dividing plate away from the installation groove abuts against the wall of the water filtration chamber. The dividing plate slides radially under the constraint of the wall of the water filtration chamber. A filter screen is provided at the notch of the groove, and the filter screen covers the notch. A water outlet is provided on the side wall of the groove, and the water outlet is connected to the pretreatment box. The drain outlets on the side walls overlap, and the filter chamber wall consists of a filter section and a transition treatment section connected in sequence. The filter section gradually becomes equal to the outer surface of the rotating barrel. The transition treatment section includes end A and end B. End A is connected to the filter section, and end B is connected to the transition treatment section. The distance between the transition treatment section and the surface of the rotating barrel gradually decreases from end A to end B. An elastic cleaning brush for cleaning the surface of the filter screen is installed at the tail end of the transition treatment section. A drain outlet is provided in the filter chamber, located directly below the transition treatment section. A filter inlet is provided above the filter chamber, located on the upper left side of the filter tank and connected to the filter section.

[0007] As a further embodiment of the present invention, the elastic cleaning brush extends along the axial direction of the rotating drum.

[0008] As a further embodiment of the present invention: a first elastic element is provided inside the mounting groove, and the two ends of the first elastic element are respectively fixedly installed at the bottom of the dividing plate and the bottom of the mounting groove.

[0009] As a further embodiment of the present invention: the delivery component includes an infusion pump, the infusion pump input end is connected to the interior of the pretreatment tank through a pipe, and the infusion pump output end is connected to the input end of the multi-stage adsorption tank through a pipe.

[0010] As a further embodiment of the present invention: one end of the filter screen is elastically rotatably mounted on the end passing through the groove notch, and the other end of the filter screen is movably covered on the other end passing through the groove notch. The rotating barrel is also provided with a driving mechanism for driving the movable end of the filter screen to jump. The driving mechanism is connected to the adjacent dividing plate. The wall of the water filtration chamber also includes a transition section. The transition treatment section is connected to the filter section through the transition section. The transition section includes end C and end D. End C is connected to end B of the transition treatment section, and end D is connected to the filter section. The distance between the transition section and the surface of the rotating barrel gradually increases from end C and end D.

[0011] As a further embodiment of the present invention: a supporting shaft is provided on the rotating barrel, the supporting shaft passes through a through hole at the center of the rotating barrel, and the through hole extends along the axial direction of the rotating barrel, and the supporting shaft is rotatably mounted on the pretreatment box.

[0012] As a further embodiment of the present invention: the driving mechanism includes each kit sleeved on the outside of the dividing plate, each kit being attached to the surface of the rotating barrel by a second elastic member, top blocks being symmetrically arranged on the outside of the dividing plate, and the kits being arranged on the trajectory of the top blocks; the movable end of the filter screen is attached to the kit.

[0013] As a further embodiment of the present invention: the two ends of the second elastic member are respectively fixedly installed on the kit and the rotating barrel.

[0014] As a further embodiment of the present invention: the modified attapulgite-based composite adsorbent is made of attapulgite as a base material, modified by a silane coupling agent, and then composited with mesoporous carbon and / or composited with 4A molecular sieve.

[0015] Compared with existing technologies, the beneficial effects of this invention are: by combining modified attapulgite-based composite adsorbents with a multi-stage modular adsorption structure, and by using composite adsorbents with different modified components in adjacent adsorption modules, the invention achieves synergistic and efficient removal of multiple pollutants such as heavy metal ions and organic dyes, solving the problem of poor treatment effect of existing devices on complex wastewater, and possessing outstanding substantive features. Furthermore, by incorporating self-cleaning filter components, clogging is avoided, ensuring long-term stable operation of the device, while reducing maintenance costs and improving overall operating efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a wastewater purification device based on attapulgite composite adsorbent according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of a wastewater purification device based on an attapulgite-based composite adsorbent according to an embodiment of the present invention.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 for Figure 2 Enlarged view of section B in the middle.

[0020] Figure 5 This is a schematic diagram of the rotating drum in a wastewater purification device using an attapulgite-based composite adsorbent according to an embodiment of the present invention.

[0021] In the picture: 10-Pretreatment unit, 20-Multi-stage adsorption unit, 30-Conveying component, 101-Pretreatment box, 102-Water filter box, 103-Filter inlet, 104-Rotating bucket, 105-Supporting shaft, 106-Pass groove, 107-Filter screen, 108-Divider plate, 109-Water filter chamber, 110-Drain outlet, 111-Water outlet, 112-Top block, 113-Kit, 114-First elastic element, 115-Mounting groove, 116-Second elastic element, 117-Elastic cleaning brush, 201-Multi-stage adsorption box, 202-Adsorption module. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 Please see Figures 1-5 The present invention provides a structural diagram of an attapulgite-based composite adsorbent wastewater purification device according to Embodiment 1. The attapulgite-based composite adsorbent wastewater purification device includes: a pretreatment unit 10 and a multi-stage adsorption unit 20. A conveying component 30 is also provided between the pretreatment unit 10 and the multi-stage adsorption unit 20. The conveying component 30 is used to input the pretreated wastewater into the multi-stage adsorption unit 20. The multi-stage adsorption unit 20 includes a multi-stage adsorption box 201. At least two sets of detachable adsorption modules 202 are arranged inside the multi-stage adsorption box 201 along the water flow direction. The adsorption modules 202 are filled with modified attapulgite-based composite adsorbent. The pretreatment unit 10 includes a pretreatment box 101 and a filter assembly with a self-cleaning function installed on the pretreatment box 101.

[0024] This invention combines a modified attapulgite-based composite adsorbent with a multi-stage modular adsorption structure. Adjacent adsorption modules employ composite adsorbents with different modified components, achieving synergistic and efficient removal of multiple pollutants such as heavy metal ions and organic dyes. This solves the problem of poor treatment performance for complex wastewater in existing devices, demonstrating significant advantages. The self-cleaning filter components prevent clogging, ensuring long-term stable operation of the device while reducing maintenance costs and improving overall operating efficiency.

[0025] like Figure 2 , Figure 3 and Figure 4In some embodiments, the filtration assembly includes a pretreatment box 101 with an internal filtration chamber 109. A rotating barrel 104 is rotatably disposed inside the pretreatment box 101. A plurality of through grooves 106 are arranged in an array on the outer side of the rotating barrel 104. An installation groove 115 is also provided between adjacent through grooves 106. A dividing plate 108 is slidably disposed in the installation groove 115. The dividing plate 108 is elastically slidably disposed in a supporting rotating shaft 105, and the end of the dividing plate 108 away from the installation groove 115 abuts against the wall of the filtration chamber 109. The dividing plate 108 slides radially under the constraint of the wall of the filtration chamber 109. A filter screen 107 is provided at the notch of the through groove 106, covering the notch. A water outlet 111 is provided on the side wall of the through groove 106. The water outlet 111 coincides with the drain outlet on the side wall of the pretreatment tank 101. The wall of the filtration chamber 109 consists of a filtration section and a transition treatment section connected in sequence. The filtration section gradually becomes equal to the outer surface of the rotating barrel 104. The transition treatment section includes end A and end B. End A is connected to the filtration section, and end B is connected to the transition treatment section. The distance between the transition treatment section and the surface of the rotating barrel 104 gradually decreases from end A to end B. An elastic cleaning brush 117 for cleaning the surface of the filter screen 107 is installed at the tail end of the transition treatment section. A drain outlet 110 is provided in the filtration chamber 109, and the drain outlet 110 is located directly below the transition treatment section. A filter inlet 103 is provided above the filtration chamber 109. The filter inlet 103 is located on the upper left side of the filtration tank 102 and is connected to the filtration section. In use, the wastewater to be treated is added into the filter chamber 109 through the filter inlet 103, into the filter chamber 109 between several adjacent dividing plates 108 located at the input position of the filter inlet 103. After being filtered by the corresponding filter screen 107, it enters the groove 106 and is then discharged into the pretreatment tank 101 through the outlet 111. When some filter residue accumulates on the filter screen 107 directly below the filter inlet 103, the filtration capacity of the filter screen 107 decreases. At this time, a certain amount of wastewater accumulates above the filter screen 107, and the rotating bucket is propelled by the wastewater. Rotation 104 occurs repeatedly, causing the rotating drum 104 to rotate intermittently. When the filter screen 107 to be processed passes through the filtration section and enters the transition processing section, the partition plate 108 retracts into the mounting groove 115 under the guidance of the transition processing section. When it approaches the elastic cleaning brush 117 set at the end of the transition processing section, the elastic cleaning brush 117 cleans the surface of the filter screen 107. The filter residue after cleaning is discharged through the drain port 110, thus realizing the automatic recovery and cleaning of the filter screen 107, avoiding the problem of periodic cleaning required by existing technology. The elastic cleaning brush 117 is elastically designed to allow the partition plate 108 to filter through.When the dividing plate 108 is in the filtration section, the corresponding water outlet 111 on the groove 106 is connected to the drain outlet on the side wall of the filter tank 102, so that the filtrate can be discharged smoothly. When the dividing plate 108 enters the transition treatment section and gradually shrinks, the groove 106 rotates synchronously to make the water outlet 111 and the drain outlet on the side wall of the filter tank 102 staggered.

[0026] In some embodiments, the elastic cleaning brush 117 extends axially along the rotating barrel 104.

[0027] In some embodiments, a first elastic element 114 is provided inside the mounting groove 115. The two ends of the first elastic element 114 are respectively fixedly installed on the bottom of the dividing plate 108 and the bottom of the mounting groove 115, so that the dividing plate 108 is elastically slidably installed on the dividing plate 108. The first elastic element 114 can be a helical spring or an elastic telescopic element.

[0028] In some embodiments, the delivery component 30 includes an infusion pump, the infusion pump input end of which is connected to the interior of the pretreatment tank 101 via a pipe, and the infusion pump output end of which is connected to the input end of the multi-stage adsorption tank 201 via a pipe.

[0029] like Figure 2 , Figure 3 and Figure 4 In some embodiments, to improve the cleaning effect on the filter screen 107, one end of the filter screen 107 is elastically rotatably mounted on the end passing through the notch in the groove 106, and the other end of the filter screen 107 is movably covered on the other end passing through the notch in the groove 106. The rotating barrel 104 is also provided with a driving mechanism to drive the movable end of the filter screen 107 to move. The driving mechanism is connected to the adjacent dividing plate 108. The wall of the filtration chamber 109 also includes a transition section, which is connected to the filter section. The transition section includes end C and end D. End C is connected to end B of the transition section, and end D is connected to the filter section. The distance between the transition section and the surface of the rotating barrel 104 gradually increases from end C and end D. The distance between end D and the surface of the rotating barrel 104 is less than the distance between the filter section and the surface of the rotating barrel 104. When the dividing plate 108 leaves the D end, it automatically extends outward under the elastic action after losing its resistance. The driving force of the dividing plate 108 drives the mechanism to drive the moving end of the filter screen 107 to jump suddenly, thereby causing the surface of 107 to vibrate instantaneously, causing the filter residue attached to it to loosen and detach. Combined with the cleaning action of 117, a dual cleaning effect is achieved.

[0030] In some embodiments, a supporting shaft 105 is provided on the rotating barrel 104. The supporting shaft 105 passes through a through hole at the center of the rotating barrel 104, and the through hole extends axially along the rotating barrel 104. The supporting shaft 105 is rotatably mounted on the pretreatment box 101. In this way, the rotating barrel 104 is rotatably mounted on the pretreatment box 101.

[0031] In some embodiments, the drive mechanism includes a kit 113 fitted around the outside of the dividing plate 108. Each kit 113 is attached to the surface of the rotating barrel 104 via a second elastic member 116. Top blocks 112 are symmetrically arranged on the outside of the dividing plate 108, and the kits 113 are positioned on the tracks of the top blocks 112. The movable end of the filter screen 107 overlaps the kit 113. When the dividing plate 108 moves along the surface of the filtration chamber 109 to the transition section D, the dividing plate 108 loses the constraint of the inner wall of the filtration chamber 109. Under the action of the outer elastic force, the dividing plate 108 pops outward, pushing the kit 113 to move along the track of the top blocks 112, thereby squeezing the movable end of the filter screen 107 to make it jump instantaneously, thus achieving filter screen vibration. This vibration, combined with the synchronous cleaning of the elastic cleaning brush 117, effectively peels off and removes residues attached to the surface of the filter screen 107, ensuring continuous and stable filtration efficiency, while reducing maintenance frequency and improving the reliability of the system's automated operation.

[0032] In some embodiments, the two ends of the second elastic member 116 are fixedly mounted on the kit 113 and the rotating barrel 104, respectively, so that the second elastic member 116 is elastically mounted on the first elastic member 114, which facilitates the reset of the kit 113. The second elastic member 116 can be a coil spring.

[0033] In some embodiments, the filter screen 107 is rotatably mounted at one end through the notch of the groove 106 via a spring hinge. A torsion spring is provided on the spring hinge, and the torsion spring provides elastic restoring force for the reset of the movable end of 107, ensuring that it quickly returns to its original position after jumping and maintaining the stability of the filter screen structure.

[0034] In some embodiments, the bottom of the drain outlet 110 is also provided with a guide hopper to discharge the separated filter residue.

[0035] In some embodiments, the modified attapulgite-based composite adsorbent uses attapulgite as a base material, modified with a silane coupling agent, and then composited with mesoporous carbon and / or composite 4A molecular sieves. The composite mesoporous carbon is used to adsorb organic dyes, while the adsorption modules of the composite 4A molecular sieve are used to adsorb heavy metal ions. The modified attapulgite-based composite adsorbent enhances compatibility through chemical modification and couples the precise sieving advantages of microporous molecular sieves with the rapid loading advantages of mesoporous carbon. Using natural attapulgite as a stable framework, it ultimately constructs a synergistic adsorption system capable of handling multiple pollutants and maintaining high efficiency and stability under complex environments.

[0036] In some embodiments, the adsorption module 202 adopts a drawer-type structure. The adsorption module 202 includes a hollow shell and an adsorbent carrier net disposed inside the shell. The adsorbent carrier net is provided with a modified attapulgite-based composite adsorbent.

[0037] In some embodiments, the pretreatment tank 101 may also be equipped with a magnetic separator to collect ferromagnetic particles from the wastewater.

[0038] The working principle of this invention is: During use, the wastewater to be treated is added into the filter chamber 109 through the filter inlet 103. The wastewater is added into the filter chamber 109 between several adjacent dividing plates 108 located at the input position of the filter inlet 103. After being filtered by the corresponding filter screen 107, it enters the passage groove 106 and is then discharged into the pretreatment tank 101 through the outlet 111. When some filter residue accumulates on the filter screen 107 directly below the filter inlet 103, the filtration capacity of the filter screen 107 decreases. At this time, a certain amount of wastewater accumulates above the filter screen 107. Driven by the wastewater, the rotating barrel 104 rotates. This process is repeated, causing the rotating barrel 104 to rotate intermittently. When the filter screen 107 to be treated passes through the filtration section and enters the transition treatment section, the dividing plates 108 are in the transition treatment... Under the guidance of the section, it retracts into the mounting groove 115. When it approaches the elastic cleaning brush 117 set at the end of the transition section, the elastic cleaning brush 117 cleans the surface of the filter screen 107. After cleaning, the filter residue is discharged through the drain port 110, thus realizing the automatic recovery and cleaning of the filter screen 107, avoiding the problem of needing to clean it periodically in the prior art. When the dividing plate 108 moves from the transition section to the filtration section, the dividing plate 108 suddenly loses its restraint and quickly pops outward under the elastic action of the first elastic element 114. It drives the top block 112 to drive the kit 113 to jump outward, which in turn drives the kit 113 to suddenly rotate the filter screen 107 outward, so that the filter residue on the surface of the filter screen 107 is completely peeled off under the action of inertia and falls into the guide hopper for centralized discharge. The wastewater after filtration is input into the multi-stage adsorption unit 20 through the conveying component 30, and is purified by the multi-layer adsorption module 202 in the multi-stage adsorption box 201.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, 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 number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A wastewater purification device using an attapulgite-based composite adsorbent, characterized in that, include: The pretreatment unit includes a pretreatment chamber and a filter assembly with self-cleaning function installed on the pretreatment chamber; A multi-stage adsorption unit, comprising a multi-stage adsorption box, wherein at least two sets of detachable adsorption modules are arranged inside the multi-stage adsorption box along the water flow direction, and the adsorption modules are filled with modified attapulgite-based composite adsorbent. And a conveying component disposed between the pretreatment unit and the multi-stage adsorption unit, the conveying component being used to input the wastewater after pretreatment by the pretreatment unit into the multi-stage adsorption unit.

2. The wastewater purification device based on attapulgite composite adsorbent according to claim 1, characterized in that, The filtration assembly includes a pretreatment box with an internal filtration chamber. A rotating barrel is rotatably mounted inside the pretreatment box. Several through grooves are arranged in an array on the outer side of the rotating barrel, and mounting grooves are provided between adjacent through grooves. A dividing plate is slidably mounted in the mounting groove, and the dividing plate is elastically slidably mounted in a supporting rotating shaft, with the end of the dividing plate away from the mounting groove abutting against the wall of the filtration chamber. The dividing plate slides radially under the constraint of the filtration chamber wall. A filter screen is provided at the notch of the through groove, covering the notch. A water outlet is provided on the side wall of the through groove, and the water outlet connects to the drainage outlet on the side wall of the pretreatment box. The filter chamber is composed of a filter section and a transition treatment section connected in sequence. The filter section gradually becomes equal to the outer surface of the rotating barrel. The transition treatment section includes end A and end B. End A is connected to the filter section, and end B is connected to the transition treatment section. The distance between the transition treatment section and the surface of the rotating barrel gradually decreases from end A to end B. An elastic cleaning brush for cleaning the surface of the filter screen is installed at the tail end of the transition treatment section. A drain outlet is provided in the filter chamber, which is located directly below the transition treatment section. A filter inlet is provided above the filter chamber, which is located on the upper left side of the filter tank and connected to the filter section.

3. The wastewater purification device based on attapulgite composite adsorbent according to claim 2, characterized in that, The flexible cleaning brush extends along the axis of the rotating drum.

4. The wastewater purification device based on attapulgite composite adsorbent according to claim 2, characterized in that, The mounting groove is provided with a first elastic element, and the two ends of the first elastic element are respectively fixedly installed at the bottom of the dividing plate and the bottom of the mounting groove.

5. The wastewater purification device based on attapulgite composite adsorbent according to claim 1, characterized in that, The delivery component includes an infusion pump, the infusion pump input end of which is connected to the interior of the pretreatment tank via a pipe, and the infusion pump output end of which is connected to the input end of the multi-stage adsorption tank via a pipe.

6. The wastewater purification device based on attapulgite composite adsorbent according to claim 2, characterized in that, One end of the filter screen is elastically rotatably mounted on the end through the groove notch, and the other end of the filter screen is movably covered on the other end through the groove notch. The rotating barrel is also provided with a drive mechanism to drive the movable end of the filter screen to jump. The drive mechanism is connected to the adjacent dividing plate. The wall of the water filtration chamber also includes a transition section, which is connected to the filter section. The transition section includes end C and end D. End C is connected to end B of the transition section, and end D is connected to the filter section. The distance between the transition section and the surface of the rotating barrel gradually increases from end C and end D.

7. The wastewater purification device based on attapulgite composite adsorbent according to claim 6, characterized in that, A supporting shaft is provided on the rotating barrel. The supporting shaft passes through a through hole at the center of the rotating barrel, and the through hole extends along the axial direction of the rotating barrel. The supporting shaft is rotatably mounted on the pretreatment box.

8. The wastewater purification device based on attapulgite composite adsorbent according to claim 6, characterized in that, The drive mechanism includes a kit fitted on the outside of the dividing plate, each kit being attached to the surface of the rotating barrel by a second elastic element. Top blocks are symmetrically arranged on the outside of the dividing plate, and the kits are arranged on the track of the top blocks. The movable end of the filter screen overlaps the kit.

9. The wastewater purification device based on attapulgite composite adsorbent according to claim 8, characterized in that, The two ends of the second elastic element are fixedly installed on the kit and the rotating barrel, respectively.

10. The wastewater purification device based on attapulgite composite adsorbent according to claim 1, characterized in that, The modified attapulgite-based composite adsorbent is made of attapulgite as a base material, modified by a silane coupling agent, and then composited with mesoporous carbon and / or 4A molecular sieve.

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