CN219259800U

CN219259800U - Charcoal and sand adding adsorption clarification system

Info

Publication number: CN219259800U
Application number: CN202320853347.5U
Authority: CN
Inventors: 张盛楠; 李滢
Original assignee: Beijing Shannuo Shuiyuan Environmental Technology Co ltd
Current assignee: Beijing Shannuo Shuiyuan Environmental Technology Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-06-27
Anticipated expiration: 2033-04-17

Abstract

The utility model discloses a carbon-adding sand-adding adsorption clarification system, which relates to the field of environmental protection water treatment, and comprises the following components: the contact tank is internally provided with a first guide cylinder which is communicated with the contact tank, and the contact tank is connected with a first dosing pipe; the coagulation tank is communicated with the contact tank and is connected with a second dosing pipe and a light outlet; the flocculation zone comprises a flocculation tank, a rear flocculation tank and a second guide cylinder, the second guide cylinder is communicated with the bottom of the coagulation tank, the inside and the outside of the second guide cylinder are respectively connected with a heavy outlet and a mixed gas discharge pipe, the rear flocculation tank is communicated with the flocculation tank, and a plurality of folded plates are arranged in the rear flocculation tank; the sedimentation tank is communicated with the rear flocculation tank, the sedimentation tank is divided into an upper side area and a lower side area through an inclined tube, the upper side area is communicated with the water outlet tank, the lower side area is connected with an ultrasonic centrifugal screening structure, and the outlet end of the ultrasonic centrifugal screening structure is connected with a light outlet and a heavy outlet; the floccules can be better formed, and the flocculation effect of the powdered carbon is enhanced.

Description

Charcoal and sand adding adsorption clarification system

Technical Field

The utility model belongs to the field of environmental protection water treatment, and particularly relates to a carbon-adding and sand-adding adsorption clarification system.

Background

The high-density sedimentation tank is a common process for removing SS and total phosphorus by an advanced treatment system, and consists of a coagulation tank, a flocculation tank and a sedimentation tank, wherein colloid particles in sewage are destabilized by a coagulant and react with phosphate to generate chemical sedimentation, and flocculation is increased by utilizing the adsorption bridging and net capturing sweeping effects of the flocculant, so that clear and standard effluent is obtained by the principle of gravity sedimentation and shallow tank sedimentation. And after the dissolved organic matters in the sewage are subjected to secondary biochemical treatment or three-stage treatment of ozone and a biological aerated filter, the basically biodegradable components in the sewage are remained, and at the moment, the organic matters are further removed, so that the difficulty is great. Advanced oxidation and biological methods are not possible.

At present, powder adsorbent and ballast are adopted to assist coagulation to realize SS and COD removal in China, recovered powder adsorbent is introduced into a contact area, supplemented powder adsorbent is injected to the upstream of the contact area, flocculant and recovered ballast are both introduced into a flocculation area, and sludge, ballast and powder adsorbent mixture extracted from the lower part of a precipitation area are separated and recovered by a hydrocyclone. Problems with such clarification processes include: 1. the powder adsorbent injected at the upstream of the contact area is influenced by the recovered powder adsorbent, so that good dispersion performance is difficult to realize in water, the adsorption effect on soluble organic matters is poor, and the particle size of the powdered carbon is smaller and the sedimentation performance is poor; 2. the flocculation area is influenced by the recovered ballast, the flocculating effect of the flocculant on the powder adsorbent discharged from the contact area is poor, the powder adsorbent is difficult to form large flocs, and meanwhile, the stirring condition of the flocculation area can only form a fixed speed gradient, so that the formation of the flocs is not facilitated; 3. the hydrocyclone is adopted to realize the separation of the ballast in the extraction mixture at the lower part of the sedimentation tank, and the sludge, the powder adsorbent and the ballast are tightly combined together under the existence of the flocculant, so that the separation effect is poor.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides a carbon-adding and sand-adding adsorption clarification system, wherein the clarification system is provided with three process sections of powder carbon flocculation, stirring sand suction and flocculation assistance and flap flocculation in a flocculation area, the powder carbon flocculation process is not influenced by fine sand, fine sand is added to assist the flocculation after the powder carbon micro-flocculation is formed, flap hydraulic mixing is added to flocculate after stirring flocculation, the speed gradient is gradually reduced, the flocculation can be better formed, and the effect of powder carbon flocculation is enhanced.

In order to achieve the above object, the present utility model provides a charcoal-adding sand-adding adsorption clarification system, comprising:

the sewage treatment device comprises a contact tank, wherein a first guide cylinder is arranged in the contact tank, sewage is led into the contact tank through a water distribution area by the first guide cylinder, and the contact tank is connected with a first dosing pipe;

the coagulation tank is communicated with the contact tank through a first overflow hole, and is connected with a second dosing pipe and a light outlet;

the flocculation zone comprises a flocculation tank, a rear flocculation tank and a second guide cylinder, wherein the second guide cylinder is communicated with the bottom of the flocculation tank through a powdered carbon flocculation connector, the inside and the outside of the second guide cylinder are respectively connected with a heavy outlet and a mixed gas discharge pipe, the rear flocculation tank is communicated with the flocculation tank through a second overflow hole, and a plurality of folded plates are arranged in the rear flocculation tank along the vertical direction;

the sedimentation tank, with the bottom intercommunication of back flocculation tank, the sedimentation tank passes through the inclined tube and falls into upside region and downside region with it, upside region and play water pond intercommunication, downside region is connected with the entry end of supersound centrifugal screening structure, the exit end of supersound centrifugal screening structure with light export with heavy exit linkage.

Optionally, the automatic sand supplementing device further comprises an automatic sand supplementing structure, and the automatic sand supplementing structure and the heavy outlet are communicated with the inside of the second guide cylinder through a drainage funnel.

Optionally, stirring paddles are respectively arranged in the first guide cylinder, the coagulation tank and the second guide cylinder.

Optionally, a drainage tube is arranged at the lower end of the drainage funnel, and the drainage tube is arranged right above the stirring paddle in the second guide cylinder.

Optionally, the upper side area is provided with a water outlet tank, and the water outlet tank is communicated with the water outlet tank through a third water passing hole.

Optionally, a carbon interception tank is arranged in the water outlet tank, a liquid level meter is arranged in the carbon interception tank, and a turbidity meter is arranged in the water outlet tank.

Optionally, the sedimentation tank is internally provided with an inclined tube online cleaning structure, the inclined tube online cleaning structure comprises a drainage tank and an air washing tube, the air washing tube is arranged below the inclined tube, and the drainage tank is arranged between the water outlet tank and the inclined tube.

Optionally, the ultrasonic centrifugal screening structure comprises:

one end of the solid suspended matter discharge pipe is communicated with the bottom of the sedimentation tank, and a wear-resistant centrifugal pump and a pressure transmitter are arranged on the solid suspended matter discharge pipe;

the input end of the ultrasonic transducer is connected with the other end of the solid suspended matter discharge pipe, the ultrasonic transducer is connected with the ultrasonic generator, and the output end of the ultrasonic transducer is respectively connected with the heavy outlet and the light outlet.

Optionally, a mud bucket is arranged at the bottom of the sedimentation tank, and a mud scraper is arranged between the mud bucket and the inclined tube.

Optionally, a shutter cover plate is arranged above the rear flocculation tank and the sedimentation tank.

The utility model provides a charcoal-adding sand-adding adsorption clarification system, which has the beneficial effects that:

1. the clarification system is provided with the first dosing pipe on the contact tank for supplementing powdered carbon and fully mixing the powdered carbon with sewage in the contact tank, so that the adsorption effect of soluble organic matters is enhanced, and the recovered powdered carbon enters the coagulation tank through the light outlet, thereby avoiding affecting the adsorption efficiency of the supplemented powdered carbon;

2. the clarification system adopts an ultrasonic transducer to effectively strip the sludge on the surface of fine sand, the fine sand and the sludge mixture discharged from the sedimentation tank through cavitation, thereby improving the separation effect;

3. the clarification system adopts an automatic sand supplementing structure to automatically supplement fine sand, so that the running stability of the system is improved, and the labor intensity of personnel is reduced.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular descriptions of exemplary embodiments of the utility model as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the utility model.

FIG. 1 shows a schematic diagram of a carbon-plus-sand adsorption clarification system according to one embodiment of the utility model.

FIG. 2 is a graph showing water quality and removal rate data for inlet and outlet water of a carbon-plus-sand adsorption clarification system according to one embodiment of the utility model.

Reference numerals illustrate:

1. a contact tank; 2. a first guide cylinder; 3. a water distribution area; 4. a first dosing tube; 5. a coagulation pool; 6. a first overflow aperture; 7. a second dosing tube; 8. a lightweight outlet; 9. a flocculation tank; 10. a post flocculation tank; 11. a second guide cylinder; 12. a carbon powder flocculation connector; 13. a heavy outlet; 14. a mixed gas discharge pipe; 15. a second overflow aperture; 16. a folded plate; 17. a sedimentation tank; 18. a chute; 19. a water outlet tank; 20. a drainage funnel; 21. fine sand storage bin; 22. a screw conveyor; 23. a drainage tube; 24. a water outlet tank; 25. a third water passing hole; 26. a carbon interception tank; 27. a liquid level gauge; 28. a turbidity meter; 29. a drainage channel; 30. a gas wash pipe; 31. wear-resistant centrifugal pump; 32. a pressure transmitter; 33. an ultrasonic transducer; 34. a solids suspension discharge pipe; 35. an ultrasonic generator; 36. a mud bucket; 37. a mud scraper; 38. shutter cover plate.

Detailed Description

Preferred embodiments of the present utility model will be described in more detail below. While the preferred embodiments of the present utility model are described below, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

The utility model provides a charcoal-adding sand-adding adsorption clarification system, which comprises:

the contact tank is internally provided with a first guide cylinder, the first guide cylinder introduces sewage into the contact tank through a water distribution area, and the contact tank is connected with a first dosing pipe;

the coagulation pool is communicated with the contact pool through the first overflow hole, and is connected with a second dosing pipe and a light outlet;

the flocculation zone comprises a flocculation tank, a rear flocculation tank and a second guide cylinder, the second guide cylinder is communicated with the bottom of the coagulation tank through a powdered carbon flocculation connector, the inside and the outside of the second guide cylinder are respectively connected with a heavy outlet and a mixed gas discharge pipe, the rear flocculation tank is communicated with the flocculation tank through a second overflow hole, and a plurality of folded plates are arranged in the rear flocculation tank along the vertical direction;

the sedimentation tank is communicated with the bottom of the rear flocculation tank, the sedimentation tank is divided into an upper side area and a lower side area through an inclined tube, the upper side area is communicated with the water outlet tank, the lower side area is connected with the inlet end of the ultrasonic centrifugal screening structure, and the outlet end of the ultrasonic centrifugal screening structure is connected with the light outlet and the heavy outlet.

Specifically, the clarification system leads sewage into the contact tank from the water distribution area, the water distribution area is connected with the bottom of the contact tank through a water distribution pipe, the sewage in the contact tank is fully mixed with powdered carbon from a first dosing pipe, a first guide cylinder is arranged in the contact tank, and water flow patterns of up-and-down rotational flow are formed inside and outside the first guide cylinder through an internal stirrer, so that a good mixing effect can be achieved at low energy consumption; then, the contact tank introduces sewage into the coagulation tank through the first overflow hole, the sewage flows from top to bottom in the coagulation tank, and is mixed with coagulant added by the second dosing pipe and sludge and powdered carbon discharged from the light outlet in the flowing process, at the moment, suspended colloid particles in the sewage are destabilized, and meanwhile, the coagulant can realize chemical dephosphorization; next, the coagulation tank enters the bottom of the second guide cylinder through the powder carbon flocculation connector, and a flocculating agent is added at the inlet of the powder carbon flocculation connector, so that the powder carbon in the sewage is flocculated through hydraulic mixing, and then enters the second guide cylinder, and the powder carbon is mixed with fine sand discharged from a heavy outlet and fine sand which is replenished periodically, the fine sand is fully mixed in the second guide cylinder, so that the volume of the flocculated body is increased, and the external sewage of the second guide cylinder is subjected to the action of mixed gas to form an up-down rotational flow state, so that the sewage of the flocculation tank enters the rear flocculation tank from a second overflow hole, and larger flocculated body is further formed under the action of folded plates in the rear flocculation tank; finally, sewage is mixed with suspended solids to enter from the bottom of the sedimentation tank, the sewage passes through the inclined tube from bottom to top and enters the water outlet tank, in addition, the suspended solids are separated, and the suspended solids move downwards along the inclined tube and finally enter an ultrasonic centrifugal screening structure, and under the action of ultrasonic reaction and centrifugal reaction, sludge, powdered carbon and fine sand are respectively returned to the flocculation tank and the coagulation tank.

The first guide cylinder and the second guide cylinder are respectively arranged in the contact tank and the flocculation tank, so that the sewage in the tank body can form rotational flow inside and outside the tank body, and the stirring energy consumption is saved; the mixed gas discharge pipe is arranged outside the second guide cylinder, so that the flow state is optimized, and meanwhile, the deposition of mud and sand can be prevented.

In one embodiment, a water distribution weir is arranged in the water distribution area, so that the flow average distribution among the groups of tanks connected in parallel can be realized, and a control valve is arranged on a water distribution pipe between the water distribution area and the contact tank to perform water inlet parallel control of the groups of tanks; the powdered carbon added through the first dosing pipe is required to be added after the particle size of the powdered carbon is selected to be 50-85 mu m and is prepared into 1-3% of carbon slurry; the mixing agent is added into the second dosing pipe, and the adding amount is controlled to be 20-70 mg/L; adding a flocculating agent at the inlet of the powdered carbon flocculation connector, wherein the adding amount is required to be controlled to be 1-2 mg/L; the length of the inclined tube in the sedimentation tank is 1000-1500 mm, the inclination angle is 60 degrees, and the aperture is 50-100 mm; in the water distribution area of the clarification system, sewage is introduced through a water inlet pipe, a flowmeter and a first COD on-line analyzer are arranged on the water inlet pipe, in addition, a second COD on-line analyzer is arranged on a water outlet pipe of a water outlet tank, and the detection results of the flowmeter and the two COD on-line analyzers are used for indicating the adjustment of the addition amount of powdered carbon through calculation.

Specifically, the automatic sand supplementing structure can realize the automatic supplement of fine sand, and consists of a fine sand storage bin and a screw conveyer, and the supplemented fine sand is sent into a drainage funnel on a second guide cylinder of the flocculation tank.

In one embodiment, the particle size of the automatically replenished fine sand ranges from 90 to 110 μm.

Specifically, in the first guide cylinder, the powdered carbon supplemented from the first dosing pipe is put into a contact tank, and good dispersion is realized under the turbulent flow condition formed by stirring of a stirring paddle, so that the contact opportunity of organic matters in sewage and the supplemented powdered carbon is increased, and the adsorption removal of dissolved organic matters is enhanced

In one embodiment, the stirring speed gradient of the stirring paddle in the first guide cylinder is controlled to be 500-1000 s ^-1 The method comprises the steps of carrying out a first treatment on the surface of the Stirring paddles in the coagulation tank, wherein the stirring speed gradient is controlled to be 300-500 s ^-1 The method comprises the steps of carrying out a first treatment on the surface of the Stirring paddles in the second guide cylinder control the stirring speed gradient to be 30-50 s ^-1 。

Optionally, a drainage tube is arranged at the lower end of the drainage funnel and is arranged right above the stirring paddle in the second guide cylinder.

Specifically, the drainage tube sends the fine sand separated by ultrasonic centrifugation and the fine sand which is supplemented periodically into the center position of the upper part of the stirring paddle in the second guide cylinder, so that the best fine sand mixing effect is realized.

Specifically, a carbon interception tank is arranged in the water outlet tank, so that when the system is unstable in operation, powdered carbon in the water outlet is intercepted, and the water quality of the water outlet is ensured; when the carbon interception tank is blocked, the liquid level at the front end of the carbon interception tank rises to a set height, at the moment, the liquid level meter can give an alarm, the carbon interception tank can be replaced in time, and in addition, the turbidity meter can detect the turbidity of water discharged from the water outlet tank.

Specifically, this online cleaning structure pours into compressed air into the sedimentation tank through the air wash pipe in, through air vibration, can drop the dirty stifled thing on inclined tube surface to under the promotion effect of intaking rivers, discharge the sedimentation tank with dirty stifled thing through the water drainage tank, whole cleaning process system need not to cut off water, also need not manual operation.

Optionally, the ultrasonic centrifugal screening structure comprises:

Specifically, solid suspended matters in the sedimentation tank are sent to an ultrasonic transducer through the suction of a wear-resistant centrifugal pump, the wear-resistant centrifugal pump is controlled by frequency conversion, an outlet of the wear-resistant centrifugal pump is connected with a pressure transmitter, the pressure of materials entering the ultrasonic transducer can be adjusted through the cooperation of the wear-resistant centrifugal pump and the pressure of the materials entering the ultrasonic transducer is controlled to be 0.2-0.3 Mpa; the ultrasonic transducer separates the mixture of the powdery carbon, the fine sand and the sludge discharged from the solid suspended matter discharge pipe by adopting an ultrasonic centrifugal separation process, so that the sludge and the powdery carbon on the surface of the fine sand are effectively stripped, and the separation effect is excellent; the ultrasonic centrifugal screening structure is used as one of the coagulation assisting carriers after throwing the recovered powdered carbon into the coagulation tank, and the adsorption performance of the powdered carbon can be further utilized in the coagulation tank.

In one embodiment, the light outlet is also provided with a flowmeter and a pneumatic regulating valve, and the powder carbon reflux quantity can be regulated by interlocking the flowmeter and the pneumatic regulating valve.

Specifically, when suspended solids move from top to bottom on the inclined tube, the suspended solids enter the mud bucket under the action of the mud scraper, so that the suspended solids are further separated.

Specifically, in order to prevent to cause the breeding of folded plate and inclined tube surface alga because of the illumination, influence out water quality, set up shutter apron on back flocculation basin and sedimentation tank, this shutter apron is in closed state separation illumination at ordinary times, can conveniently open when observing and observe the inclined tube condition.

In one embodiment, a mud level measuring valve group is further arranged in the sedimentation tank and is used for detecting the mud level condition in the sedimentation tank.

Examples

As shown in fig. 1 to 2, the present utility model provides a charcoal-adding sand-adding adsorption clarification system, comprising:

the sewage treatment device comprises a contact tank 1, wherein a first guide cylinder 2 is arranged in the contact tank 1, sewage is introduced into the contact tank 1 by the first guide cylinder 2 through a water distribution area 3, and the contact tank 1 is connected with a first dosing pipe 4;

the coagulation tank 5 is communicated with the contact tank 1 through a first overflow hole 6, and the coagulation tank 5 is connected with a second dosing pipe 7 and a light outlet 8;

the flocculation zone comprises a flocculation tank 9, a rear flocculation tank 10 and a second guide cylinder 11, wherein the second guide cylinder 11 is communicated with the bottom of the coagulation tank 5 through a powdered carbon flocculation connector 12, the inside and the outside of the second guide cylinder 11 are respectively connected with a heavy outlet 13 and a mixed gas discharge pipe 14, the rear flocculation tank 10 is communicated with the flocculation tank 9 through a second overflow hole 15, and a plurality of folded plates 16 are arranged in the rear flocculation tank 10 along the vertical direction;

the sedimentation tank 17 is communicated with the bottom of the rear flocculation tank 10, the sedimentation tank 17 is divided into an upper side area and a lower side area by an inclined pipe 18, the upper side area is communicated with the water outlet tank 19, the lower side area is connected with the inlet end of the ultrasonic centrifugal screening structure, and the outlet end of the ultrasonic centrifugal screening structure is connected with the light outlet 8 and the heavy outlet 13.

In this embodiment, the automatic sand filling structure is further included, the automatic sand filling structure and the heavy outlet 13 are communicated with the interior of the second guide cylinder 11 through the drainage funnel 20, and the automatic sand filling structure includes a fine sand silo 21 and a screw conveyor 22.

In the present embodiment, stirring paddles are provided in each of the first guide cylinder 2, the coagulation tank 5, and the second guide cylinder 11.

In this embodiment, the lower end of the drainage funnel 20 is provided with a drainage tube 23, and the drainage tube 23 is disposed directly above the stirring paddle in the second guide cylinder 11.

In the present embodiment, the upper side region is provided with a water outlet tank 24, and the water outlet tank 24 communicates with the water outlet tank 19 through a third water passing hole 25.

In the embodiment, a carbon interception tank 26 is arranged in the water outlet tank 19, a liquid level meter 27 is arranged in the carbon interception tank 26, and a turbidity meter 28 is arranged in the water outlet tank 19.

In this embodiment, the sedimentation tank 17 is further provided with an on-line cleaning structure for a chute, which includes a drain tank 29 and an air-wash pipe 30, the air-wash pipe 30 being disposed below the chute 18, the drain tank 29 being disposed between the drain tank 24 and the chute 18.

In this embodiment, the ultrasonic centrifugal screening structure includes:

a solid suspended matter discharge pipe 34, one end of which is communicated with the bottom of the sedimentation tank 17, and a wear-resistant centrifugal pump 31 and a pressure transmitter 32 are arranged on the solid suspended matter discharge pipe;

an ultrasonic transducer 33, the input end of which is connected with the other end of the solid suspended matter discharge pipe 34, the ultrasonic transducer 33 is connected with an ultrasonic generator 35, and the output end of the ultrasonic transducer 33 is connected with the heavy outlet 13 and the light outlet 8 respectively.

In this embodiment, the bottom of the sedimentation tank 17 is provided with a mud bucket 36, and a mud scraper 37 is provided between the mud bucket 36 and the inclined pipe 18.

In this embodiment, a shutter cover 38 is provided above the rear flocculation basin 10 and the sedimentation basin 17.

In summary, the clarification system is used for treating sewage with pH value of 6-9 and temperature of 25-35 ℃, wherein the carbon slurry added into the first dosing pipe 4 is prepared by adopting fresh water with particle size of 50-85 mu m, adding the carbon slurry after preparing the carbon slurry into 2%, adding carbon powder with the adding amount of 30mgL, fine sand with particle size of 90-110 mu m and adding amount of 1%, the coagulant added into the second dosing pipe 7 is PAC with the adding amount of 30mg/L, the flocculant added into the inlet of a carbon powder flocculation connector is PAM with the adding amount of 1mg/L, and the speed gradient of stirring paddles in the first guide cylinder 2 is 800s ^-1 The speed gradient of the stirring paddle of the coagulation tank 5 is 400s ^-1 The speed gradient of the stirring paddle in the second guide cylinder 11 is 40s ^-1 The method comprises the steps of carrying out a first treatment on the surface of the The inclined tube 18 in the sedimentation tank 17 is set to be 1000mm in length and 60 degrees in inclination angle, and the aperture is selected to be 80mm; the inlet pressure of the ultrasonic centrifugal screening structure is controlled to be 0.3Mpa, the frequency is 28kHz, and the mud taking point of the abrasion-resistant centrifugal pump 31 is positioned at the position 500mm above the mud bucket. After the system is used for treatment, the CODcr concentration in the wastewater is reduced from 52.56mg/L to 25.25mg/L, the total phosphorus concentration is reduced from 1.2mg/L to 0.15mg/L, and the SS concentration is reduced from 18.3mg/L to 5.25mg/L, which all reach the IV-class emission standard of the surface water environment quality standard (GB 3838-2002).

The foregoing description of embodiments of the utility model has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.

Claims

1. A char and sand adsorption clarification system, comprising:

2. The carbon and sand adding adsorptive clarification system of claim 1, further comprising an automatic sand supplementing structure, said automatic sand supplementing structure and said heavy weight outlet communicating with the interior of said second draft tube through a draft funnel.

3. The char-and-sand adsorption clarification system according to claim 2, wherein stirring paddles are respectively provided in the first guide cylinder, the coagulation tank, and the second guide cylinder.

4. The char-adding sand-adding adsorption clarification system according to claim 3, wherein a drainage tube is provided at the lower end of the drainage funnel, and the drainage tube is disposed right above the stirring paddle in the second guide cylinder.

5. The char-and-sand adsorption clarification system according to claim 1, wherein the upper side area is provided with a water outlet tank, which communicates with the water outlet tank through a third water passing hole.

6. The system of claim 5, wherein a carbon retention tank is disposed in the water outlet tank, a liquid level gauge is disposed in the carbon retention tank, and a turbidity meter is disposed in the water outlet tank.

7. The carbon-adding and sand-adding adsorption clarification system according to claim 5, wherein an inclined tube online cleaning structure is further arranged in the sedimentation tank, the inclined tube online cleaning structure comprises a drainage tank and an air washing tube, the air washing tube is arranged below the inclined tube, and the drainage tank is arranged between the water outlet tank and the inclined tube.

8. The carbon-plus-sand adsorptive clarification system of claim 1, wherein said ultrasonic centrifugal screening structure comprises:

9. The carbon-adding and sand-adding adsorption clarification system according to claim 1, wherein a mud bucket is arranged at the bottom of the sedimentation tank, and a mud scraper is arranged between the mud bucket and the inclined pipe.

10. The carbon and sand adding adsorption clarification system according to claim 1, wherein a shutter cover plate is arranged above the rear flocculation tank and the sedimentation tank.