A device for cleaning organic pollutants in water

Abstract

The present invention belongs to the field of water treatment technology and provides a device for cleaning organic pollutants in water bodies. A device for cleaning organic pollutants in water bodies includes a sludge conveying device and a sludge treatment device arranged along the sludge transmission path of the sludge conveying device. The sludge treatment device includes a sludge stirring mechanism and a sludge recovery mechanism. One end of the sludge recovery mechanism is connected to the output end of the sludge stirring mechanism, and the other end of the sludge recovery mechanism is connected to the input end of the sludge stirring mechanism. Through the above-mentioned arrangement, the reaction time between the oxidant and the sludge is extended to reduce the moisture content, oxidant content and sulfide content of the sludge, thereby reducing the viscosity of the sludge; the oxidant inside the sludge after the first treatment can be fully consumed, which can reduce the cost of the oxidant and avoid secondary pollution to the environment; the untreated sludge is mixed with the sludge after the first treatment, which can effectively reduce the moisture content of the mixture.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular provides a device for cleaning organic pollutants in water. Background Art

[0002] Sulfide in river sludge has a significant impact on water quality, aquatic life, and the health of related personnel. High concentrations of sulfide can cause water bodies to turn black and smelly, disrupting the balance of aquatic ecosystems. At the same time, sulfide may also migrate through the food chain into animals and humans, causing strong toxic effects. Therefore, river sludge needs to be collected and treated. During the sludge treatment process, an appropriate amount of oxidants such as hydrogen peroxide, chlorate, ammonium persulfate, etc. can be added to oxidize the sulfide in the sludge into easily treatable inorganic substances. Sludge drying is also an effective sludge treatment method. By exposing it to air for drying, the moisture content and sulfide content in the sludge can be reduced. Summary of the Invention

[0003] The purpose of the present invention is to convert the sulfur-containing organic matter in the sludge into easily-handled inorganic substances by oxidizing and drying the underwater sludge, thereby reducing the sulfur content in the sludge. Secondly, the oxidation time in the oxidation process is shortened and the amount of oxidant used is reduced to avoid secondary pollution to the environment or affect the subsequent treatment of the sludge; reduce the moisture content of the sludge, increase the particle size of the sludge, and fully expose the sludge to the air for drying, thereby increasing the activity of sulfur-oxidizing bacteria. A water body organic pollutant cleaning device includes a sludge conveying device and a sludge treatment device arranged along the sludge transmission path of the sludge conveying device. The sludge treatment device includes a sludge stirring mechanism and a sludge recovery mechanism. One end of the sludge recovery mechanism is connected to the output end of the sludge stirring mechanism, and the other end of the sludge recovery mechanism is connected to the input end of the sludge stirring mechanism. A sludge recovery mechanism is used to recover the sludge that does not meet the particle size requirements after the primary treatment for secondary treatment, prolonging the reaction time between the oxidant and the sludge to reduce the moisture content, oxidant content and sulfide content of the sludge, thereby reducing the viscosity of the sludge; after the sludge after the primary treatment is mixed with the untreated sludge, the internal oxidant of the sludge after the primary treatment can be fully consumed, which can reduce the cost of the oxidant and avoid secondary pollution to the environment; the untreated sludge is mixed with the sludge after the primary treatment, which can effectively reduce the moisture ratio of the mixture and the viscosity of the sludge, which is conducive to the stirring and screening of the sludge; when the total amount of subsequent untreated sludge is insufficient, the untreated sludge will adhere to the sludge after the primary treatment, increasing the volume of the mixture, which is conducive to the sludge stirring mechanism to fully stir and screen the sludge and avoid the sludge passing through the gaps of the sludge stirring mechanism.

[0004] Preferably, the sludge stirring mechanism includes at least two output ends, including a first output end and a second output end. The first output end is located in the sludge conveying direction of the sludge conveying device, and the second output end is connected to the sludge recovery mechanism. The sludge stirring mechanism disperses and screens the sludge. Due to the different sludge entry positions and the differences in water content and sulfide content of different sludge components, sludge with higher water content and higher sulfide content has higher viscosity and lower particle size. The sludge stirring mechanism only outputs sludge that meets the particle size requirements from the first output end to the next sludge processing stage, and the remaining sludge undergoes secondary processing through the sludge recovery mechanism.

[0005] Preferably, the sludge stirring mechanism further comprises a stirring rod and a stirring disk, the stirring rod being located above the sludge conveying device, the stirring rod forming an angle with the sludge transmission path, the stirring disk being arranged in a spiral along the axial direction of the stirring rod, and the stirring disk being a porous structure. The stirring disk is arranged in a spiral along the axial direction of the stirring rod, and during the rotation process, the sludge is pushed along the axial direction of the stirring rod, and in the process, the sludge is stirred, thereby completing the full mixing of the oxidant and the sludge, and fully exposing the sludge to the air, thereby completing the drying process; at the same time, the stirring disk is a porous structure, and the portion of the sludge where the oxidation reaction is nearly complete and the drying process is relatively complete, due to the lack of sulfur-containing organic matter and water, the viscosity of this portion is greatly reduced, the particle size is increased, and the sludge can pass through the holes in the stirring disk, avoiding being pushed along the axial direction of the stirring rod by the stirring disk, and is output from the first output end by the sludge conveying device to enter the next sludge treatment link, while the portion of the sludge that is not completely oxidized and has a high water content cannot pass through the holes in the stirring disk due to its high viscosity, and is therefore subjected to secondary treatment by the sludge recovery mechanism. The above settings can be used to distinguish the results of sludge treatment, which can effectively prevent the sludge from being mixed with excessive oxidants, resulting in secondary pollution to the environment; the treated sludge has a loose structure and a high particle size, which is conducive to improving the reaction rate of the next sludge treatment link and can improve the sludge treatment efficiency.

[0006] Preferably, the stirring disk is provided with at least two screening areas, the screening areas including a first screening area and a second screening area. The first screening area is closer to the center of the stirring rod than the second screening area, and the through-holes of the first screening area are larger than those of the second screening area. The second screening area is closer to the first output end than the first screening area, and the smaller through-holes of the second screening area can meet the particle size requirements of the screened sludge; the first screening area is closer to the center of the stirring rod, and the sludge dispersed and screened needs to be dispersed and screened again in the second screening area before it can be output from the first output end. Therefore, in order to save the processing cost of the stirring disk, the first screening area can use through-holes with a larger cross-section; the first screening area is closer to the second output end, and the use of through-holes with a larger cross-section in the first screening area can reduce the total amount of sludge recovered by the sludge recovery mechanism, avoiding the addition of excessive oxidants in the secondary treatment, which causes secondary pollution to the environment; the second screening area is located at the edge of the stirring disk. The first screening area disperses and screens the sludge once, which can reduce the viscosity of the sludge reaching the second screening area, which is conducive to reducing the force exerted by the second screening area on the sludge dispersion and screening, reducing the reaction force of the sludge, and avoiding sludge clogging the through-holes of the second screening area.

[0007] Preferably, the through holes in the first screening area include strip-shaped through holes, which are radially distributed in the first screening area, and the through holes in the second screening area include circular through holes. The porosity ratio of the first screening area is greater than that of the second screening area, and the width of the strip-shaped through holes matches the diameter of the circular through holes. The first screening area has a larger porosity ratio, which can prevent sludge from clogging the through holes in the first screening area. At the same time, the sludge is preliminarily dispersed and screened. After the viscosity of the sludge is reduced and the particle size is increased, it is convenient for the second screening area to further disperse and screen the sludge. The stirring disk is arranged in a spiral shape, perpendicular to the sludge transmission path, and the strip-shaped through holes are radially distributed in the first screening area. During the rotation of the stirring disk, the length direction of the strip-shaped through holes contacts the sludge, squeezing and separating the strip-shaped sludge with a larger surface area, which can quickly disperse the bonded sludge and allow the sludge to fully contact with the air for drying.

[0008] Preferably, the sludge stirring mechanism further comprises a first baffle, which is located on the side of the stirring rod proximate the first output end. The length of the first baffle matches the width of the sludge conveying device, and an opening is provided in the middle of the first baffle. With this arrangement, sludge discharged from the first output end must pass through the opening of the first baffle. Before reaching the opening, the sludge is repeatedly dispersed and screened by the sludge stirring mechanism, thereby providing time for the oxidant to react with the sulfur-containing organic matter in the sludge, ensuring sufficient mixing and contact between the oxidant and the sludge, and increasing the reaction rate between the oxidant and the sulfur-containing organic matter in the sludge.

[0009] Preferably, the sludge treatment apparatus further comprises a sludge oxidation mechanism located on the other side of the first output end of the sludge agitation mechanism. An oxidant is added to the sludge before it enters the agitation mechanism. The oxidant may be hydrogen peroxide, chlorate, ammonium persulfate, or the like.

[0010] Preferably, the sludge oxidation mechanism includes a reagent addition pipeline and a second baffle. The output end of the reagent addition pipeline is located above the second baffle. The second baffle has a through hole that mates with the output end of the reagent addition pipeline. The bottom surface of the second baffle is lower than the axis height of the sludge stirring mechanism. The second baffle limits the height of the sludge being transported, preventing sludge from contaminating the reagent addition pipeline. It also limits the total amount of sludge entering the sludge stirring mechanism per unit time, allowing the sludge stirring mechanism to fully mix oxygen, oxidant, and sludge during the stirring process.

[0011] Preferably, the sludge conveying device includes a sludge temporary storage area, which has an angle with the horizontal plane. A third baffle is provided on the side of the sludge temporary storage area away from the sludge treatment device, and the distance from the top of the third baffle to the sludge conveying device is not lower than the bottom surface of the second baffle. The sludge temporary storage area has an angle with the horizontal plane, which can accumulate sludge of a certain height, preventing the total amount of sludge entering the sludge mixer and sludge oxidation mechanism area per unit time from being insufficient, resulting in the sludge mixer being unable to roll up enough sludge for mixing and dispersion, and the sludge oxidation mechanism releasing too much oxidant per unit volume of sludge mixed with it, affecting the subsequent sludge treatment links and causing secondary environmental pollution; there is a gap between the bottom of the third baffle and the sludge conveying device. Due to the high viscosity of the sludge itself, the sludge cannot flow out of the gap, but the water content of the sludge itself will flow out by gravity, and gravity is used to preliminarily filter out the water in the sludge temporary storage area. After the third baffle is opened, the residual sludge flows out along the slope of the sludge temporary storage area under the flushing of the water flow, making it convenient to clean the sludge conveying device.

[0012] The present invention provides a water body organic pollutant cleaning device, which converts sulfur-containing organic matter in the sludge into easily treatable inorganic substances by oxidizing and drying the bottom sludge, thereby reducing the sulfur content in the sludge; shortening the oxidation time and reducing the amount of oxidant used in the oxidation process to avoid secondary pollution to the environment or affecting the subsequent treatment of the sludge; reducing the moisture content of the sludge, increasing the particle size of the sludge, allowing the sludge to be fully exposed to the air for drying, and improving the activity of sulfur-oxidizing bacteria, and has the following beneficial effects: prolonging the reaction time between the oxidant and the sludge to reduce the moisture content of the sludge and the oxidant content and sulfide content, thereby reducing the viscosity of the sludge; fully consuming the internal oxidant of the sludge after the first treatment can reduce the cost of the oxidant and avoid secondary pollution to the environment; mixing untreated sludge into the sludge after the first treatment can effectively reduce the water ratio of the mixture, reduce the viscosity of the sludge, and facilitate the stirring and screening of the sludge; when the total amount of subsequent untreated sludge is insufficient, the untreated sludge will adhere to the sludge after the first treatment, increase the volume of the mixture, which is conducive to the sludge stirring mechanism to fully stir and screen the sludge, and avoid the sludge passing through the gap of the sludge stirring mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0014] Figure 1 This is a schematic structural diagram of the water body organic pollutant cleaning device of the present invention;

[0015] Figure 2 Schematic diagram of the top view of the sludge stirring mechanism of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the sludge stirring mechanism of the present invention;

[0017] Figure 4 Schematic diagram of the side structure of the stirring plate and stirring rod of the present invention;

[0018] Figure 5 Schematic diagram of the structure of the stirring plate of the present invention.

[0019] Explanation of the reference numerals: 1 sludge stirring mechanism; 11 first baffle; 12 stirring rod; 13 stirring disk; 13a first screening area; 13b second screening area; 14 gas pipeline; 15 first output end; 16 second output end; 2 sludge recovery mechanism; 3 sludge conveying device; 4 sludge temporary storage area; 5 chemical addition pipeline; 6 second baffle; 7 third baffle; 8 sludge storage tank. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, a water body organic pollutant cleaning device includes a sludge conveying device 3 and a sludge treatment device arranged along the sludge transmission path of the sludge conveying device 3. The sludge treatment device includes a sludge stirring mechanism 1 and a sludge recovery mechanism 2. One end of the sludge recovery mechanism 2 is connected to the output end of the sludge stirring mechanism 1, and the other end of the sludge recovery mechanism 2 is connected to the input end of the sludge stirring mechanism 1. In this embodiment, the present invention also includes a sludge temporary storage area 4, a drug addition pipeline 5, a second baffle 6, a third baffle 7, and a sludge storage tank 8.

[0023] The sludge recovery mechanism 2 is used to recover the sludge that does not meet the particle size requirements after the primary treatment for secondary treatment, prolonging the reaction time between the oxidant and the sludge to reduce the moisture content, oxidant content and sulfide content of the sludge, thereby reducing the viscosity of the sludge; after the sludge after the primary treatment is mixed with the untreated sludge, the internal oxidant of the sludge after the primary treatment can be fully consumed, which can reduce the cost of the oxidant and avoid secondary pollution to the environment; the untreated sludge is mixed with the sludge after the primary treatment, which can effectively reduce the moisture ratio of the mixture and the viscosity of the sludge, which is conducive to the stirring and screening of the sludge; when the total amount of subsequent untreated sludge is insufficient, the untreated sludge will adhere to the sludge after the primary treatment, increasing the volume of the mixture, which is conducive to the sludge stirring mechanism 1 to fully stir and screen the sludge and prevent the sludge from passing through the gaps of the sludge stirring mechanism 1.

[0024] like Figure 1As shown, the sludge oxidation mechanism includes a reagent addition pipe 5 and a second baffle 6. The output end of the reagent addition pipe 5 is located above the second baffle 6. The second baffle 6 is provided with a through hole to cooperate with the output end of the reagent addition pipe 5. The bottom surface height of the second baffle 6 is lower than the axis height of the sludge stirring mechanism 1. The sludge treatment device also includes a sludge oxidation mechanism, which is located on the other side of the first output end 15 of the sludge stirring mechanism 1. Before the sludge enters the sludge stirring mechanism 1, an oxidant needs to be added. The oxidant can be hydrogen peroxide, chlorate, ammonium persulfate, etc. The second baffle 6 limits the height of the sludge transmission to prevent the sludge from contaminating the reagent addition pipe 5. At the same time, it limits the total amount of sludge entering the sludge stirring mechanism 1 per unit time, so that the sludge stirring mechanism 1 can fully mix oxygen, oxidant and sludge during the stirring process.

[0025] The sludge conveying device 3 includes a sludge temporary storage area 4, which has an angle with the horizontal plane. A third baffle 7 is provided on the side of the sludge temporary storage area 4 away from the sludge treatment device, and the distance from the top of the third baffle 7 to the sludge conveying device 3 is not lower than the bottom surface of the second baffle 6. The sludge temporary storage area 4 has an angle with the horizontal plane, which can accumulate sludge of a certain height, preventing the total amount of sludge entering the sludge mixer and sludge oxidation mechanism area per unit time from being insufficient, resulting in the sludge mixer being unable to roll up enough sludge for stirring and dispersion, and the sludge oxidation mechanism releasing too much oxidant per unit volume of sludge mixed with the sludge, affecting the subsequent sludge treatment links and causing secondary environmental pollution; there is a gap between the bottom of the third baffle 7 and the sludge conveying device 3. Due to the high viscosity of the sludge itself, the sludge cannot flow out of the gap, but the moisture contained in the sludge itself will flow out by gravity, and gravity is used to preliminarily filter out the moisture in the sludge temporary storage area 4. After the third baffle 7 is opened, the residual sludge flows out along the slope of the sludge temporary storage area 4 under the flushing of the water flow, making it convenient to clean the sludge conveying device 3.

[0026] like Figure 2 As shown, the sludge stirring mechanism 1 includes at least two output ends, including a first output end 15 and a second output end 16. The first output end 15 is located in the sludge conveying direction of the sludge conveying device 3, and the second output end 16 is connected to the sludge recovery mechanism 2. The sludge stirring mechanism 1 disperses and screens the sludge. Due to the different sludge entry points and the differences in water content and sulfide content in different sludge components, sludge with higher water content and higher sulfide content has higher viscosity and lower particle size. The sludge stirring mechanism 1 only outputs sludge that meets the particle size requirements from the first output end 15 to the next sludge treatment stage. The remaining sludge undergoes secondary treatment through the sludge recovery mechanism 2.

[0027] Combine Figure 2 、 Figure 3 and Figure 4As shown, the sludge stirring mechanism 1 also includes a stirring rod 12 and a stirring disk 13. The stirring rod 12 is located above the sludge conveying device 3. The stirring rod 12 has an angle with the sludge transmission path. The stirring disk 13 is spirally arranged along the axial direction of the stirring rod 12. The stirring disk 13 is a porous structure. The stirring disc 13 is arranged in a spiral manner along the axial direction of the stirring rod 12. During the rotation process, the transported sludge is pushed along the axial direction of the stirring rod 12, and the sludge is stirred in the process to complete the full mixing of the oxidant and the sludge, and to fully expose the sludge to the air to complete the drying. At the same time, the stirring disc 13 has a porous structure. The part of the sludge where the oxidation reaction is almost complete and the drying is relatively thorough, due to the lack of sulfur-containing organic matter and water, the viscosity of this part is greatly reduced and the particle size is increased. It can pass through the holes on the stirring disc 13, avoiding being pushed by the stirring disc 13 along the axial direction of the stirring rod 12, and is output from the first output end 15 by the sludge conveying device 3 to enter the next sludge treatment link. The part of the sludge that is not completely oxidized and has a higher moisture content cannot pass through the holes on the stirring disc 13 due to the high viscosity of the sludge, and is then subjected to secondary treatment by the sludge recovery mechanism 2. By adopting the above setting, the results of sludge treatment can be distinguished, which can effectively prevent the sludge from being mixed with excessive oxidants, causing secondary pollution to the environment; the treated sludge has a loose structure and a high particle size, which is conducive to improving the reaction rate of the next sludge treatment link and can improve the sludge treatment efficiency.

[0028] like Figure 3 As shown, the sludge agitation mechanism 1 also includes a first baffle 11, a stirring mechanism housing, and a gas pipeline 14. The first baffle 11 is located on the side of the stirring rod 12 near the first output end 15. The length of the first baffle 11 matches the width of the sludge conveying device 3, and an opening is provided in the middle of the first baffle 11. The gas pipeline 14 has multiple output ends connected to the stirring mechanism housing. The stirring mechanism housing is equipped with the stirring rod 12 and the stirring disk 13. The stirring mechanism housing itself has an interlayer, and the side of the interlayer near the stirring rod 12 and the stirring disk 13 is made of breathable material.

[0029] With the above arrangement, sludge is discharged from first output port 15 and must pass through the opening of first baffle 11. Before reaching the opening, the sludge is repeatedly dispersed and screened by sludge stirring mechanism 1, providing time for the oxidant to react with the sulfur-containing organic matter in the sludge. The oxidant and sludge are fully mixed and contacted, thereby increasing the reaction rate of the oxidant and the sulfur-containing organic matter in the sludge. The stirring mechanism housing prevents sludge from entering gas conduit 14 and splashing out of the stirring mechanism during stirring. The stirring mechanism housing evenly disperses the gas, facilitating sufficient aeration of the sludge during stirring. Under the action of oxygen, moisture, oxidant, and sulfide can fully react, reducing the moisture content and sulfide content in the sludge.

[0030] Combine Figure 3 and Figure 4As shown, the stirring plate 13 is provided with at least two screening areas, the screening areas including a first screening area 13a and a second screening area 13b. The first screening area 13a is closer to the center of the stirring rod 12 than the second screening area 13b, and the through hole of the first screening area 13a is larger than the through hole of the second screening area 13b. The second screening area 13b is closer to the first output end 15 than the first screening area 13a. The smaller through-holes in the second screening area 13b can meet the particle size requirements of the screened sludge. The first screening area 13a is close to the center of the stirring rod 12. The dispersed and screened sludge needs to be dispersed and screened again in the second screening area 13b before it can be output from the first output end 15. Therefore, in order to save the processing cost of the stirring disk 13, the first screening area 13a can use through-holes with a larger cross-section. The first screening area 13a is closer to the second output end 16. The use of through-holes with a larger cross-section in the first screening area 13a can reduce the total amount recovered by the sludge recovery mechanism 2 and avoid the addition of excessive oxidants in the secondary treatment, which causes secondary pollution to the environment. The second screening area 13b is located at the edge of the stirring disk 13. The first screening area 13a disperses and screens the sludge once, which can reduce the viscosity of the sludge reaching the second screening area 13b, thereby reducing the force applied by the second screening area 13b to disperse and screen the sludge, reducing the reaction force of the sludge, and preventing the sludge from clogging the through-holes in the second screening area 13b.

[0031] like Figure 5 As shown, the through-holes in the first screening area 13a include strip-shaped through-holes, which are radially distributed in the first screening area 13a. The through-holes in the second screening area 13b include circular through-holes. The porosity of the first screening area 13a is greater than that of the second screening area 13b, and the width of the strip-shaped through-holes matches the diameter of the circular through-holes. The larger porosity of the first screening area 13a prevents sludge from clogging the through-holes in the first screening area 13a. It also provides initial dispersion and screening of the sludge, which, after its viscosity is reduced and its particle size is increased, facilitates further dispersion and screening in the second screening area 13b. The agitator disc 13 is arranged in a spiral shape, perpendicular to the sludge transmission path. The strip-shaped through-holes are radially distributed in the first screening area 13a. As the agitator disc 13 rotates, the strip-shaped through-holes come into contact with the sludge along their length, squeezing and separating the larger surface area strip-shaped sludge. This quickly disperses any agglomerated sludge and allows the sludge to fully contact and dry with air.

[0032] The present invention provides a water body organic pollutant cleaning device, which converts sulfur-containing organic matter in the sludge into easily treatable inorganic substances by oxidizing and drying the bottom sludge, thereby reducing the sulfur content in the sludge; shortening the oxidation time and reducing the amount of oxidant used in the oxidation process to avoid secondary pollution to the environment or affecting the subsequent treatment of the sludge; reducing the moisture content of the sludge, increasing the particle size of the sludge, allowing the sludge to be fully exposed to the air for drying, and improving the activity of sulfur-oxidizing bacteria, and has the following beneficial effects: prolonging the reaction time between the oxidant and the sludge, thereby reducing the moisture content of the sludge, the oxidant content and the sulfide content, thereby reducing the viscosity of the sludge; fully consuming the internal oxidant of the sludge after the first treatment, which can reduce the cost of the oxidant and avoid secondary pollution to the environment; mixing untreated sludge into the sludge after the first treatment can effectively reduce the water ratio of the mixture, reduce the viscosity of the sludge, and facilitate the stirring and screening of the sludge; when the total amount of subsequent untreated sludge is insufficient, the untreated sludge will adhere to the sludge after the first treatment, increase the volume of the mixture, which is conducive to the sludge stirring mechanism 1 to fully stir and screen the sludge, and avoid the sludge passing through the gap of the sludge stirring mechanism 1.

[0033] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any person skilled in the art may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

Claims

1. A water body organic pollutant cleaning device, comprising a sludge conveying device (3) and a sludge treatment device arranged along the sludge transmission path of the sludge conveying device (3), characterized in that: The sludge treatment device comprises a sludge stirring mechanism (1) and a sludge recovery mechanism (2), one end of the sludge recovery mechanism (2) is connected to the output end of the sludge stirring mechanism (1), and the other end of the sludge recovery mechanism (2) is connected to the input end of the sludge stirring mechanism (1); The sludge stirring mechanism (1) comprises at least two output ends, wherein the output ends comprise a first output end (15) and a second output end (16); The sludge stirring mechanism (1) further comprises a stirring mechanism housing and a gas pipeline (14), wherein the gas pipeline (14) is provided with a plurality of output ends connected to the stirring mechanism housing, wherein a stirring rod (12) and a stirring disk (13) are provided inside the stirring mechanism housing, and the stirring mechanism housing itself has an interlayer, wherein the interlayer is made of a breathable material on a side close to the stirring rod (12) and the stirring disk (13); The stirring plate (13) is provided with at least two screening areas, the screening areas comprising a first screening area (13a) and a second screening area (13b); the first screening area (13a) is closer to the center of the stirring rod (12) than the second screening area (13b); and the through hole of the first screening area (13a) is larger than the through hole of the second screening area (13b).

2. The water body organic pollutant cleaning device according to claim 1, characterized in that: The first output end (15) is located in the sludge transport direction of the sludge conveying device (3), and the second output end (16) is connected to the sludge recovery mechanism (2).

3. The water body organic pollutant cleaning device according to claim 2, characterized in that: The stirring rod (12) is located above the sludge conveying device (3), the stirring rod (12) and the sludge transmission path have an included angle, the stirring disc (13) is spirally arranged along the axial direction of the stirring rod (12), and the stirring disc (13) is a porous structure.

4. The water body organic pollutant cleaning device according to claim 1, characterized in that: The through holes of the first screening area (13a) include strip-shaped through holes, and the strip-shaped through holes are radially distributed in the first screening area (13a). The porosity ratio of the first screening area (13a) is greater than the porosity ratio of the second screening area (13b). The through holes of the second screening area (13b) include circular through holes, and the width of the strip-shaped through holes matches the diameter of the circular through holes.

5. A water body organic pollutant cleaning device according to claim 2 or 4, characterized in that: The sludge stirring mechanism (1) further comprises a first baffle (11), the first baffle (11) being located on a side of the stirring rod (12) close to the first output end (15), the length of the first baffle (11) being matched with the width of the sludge conveying device, and an opening being provided in the middle of the first baffle (11).

6. The water body organic pollutant cleaning device according to claim 2, characterized in that: The sludge treatment device further comprises a sludge oxidation mechanism, which is located on the other side of the first output end (15) of the sludge stirring mechanism (1).

7. The water body organic pollutant cleaning device according to claim 6, characterized in that: The sludge oxidation mechanism comprises a reagent adding pipe (5) and a second baffle (6), the output end of the reagent adding pipe (5) is located above the second baffle (6), the second baffle (6) is provided with a through hole to cooperate with the output end of the reagent adding pipe (5), and the bottom surface height of the second baffle (6) is lower than the axis height of the sludge stirring mechanism (1).

8. The water body organic pollutant cleaning device according to claim 7, characterized in that: The sludge conveying device (3) comprises a sludge temporary storage area (4), the sludge temporary storage area (4) has an angle with the horizontal plane, and a third baffle (7) is provided on the side of the sludge temporary storage area (4) away from the sludge treatment device, and the distance from the top of the third baffle (7) to the sludge conveying device (3) is not lower than the bottom surface of the second baffle (6).

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