CN219194737U - Flocculation equipment and wastewater treatment system - Google Patents

Abstract

The utility model discloses a flocculation device and a wastewater treatment system, wherein the flocculation device comprises: the stirring device comprises a barrel and a stirring mechanism, wherein a cavity is formed in the barrel and comprises a mixing area and a flocculation area which are communicated, the stirring mechanism is inserted into the cavity and comprises a rotating shaft, a first stirring paddle unit and a second stirring paddle unit which are sequentially arranged on the rotating shaft, the first stirring paddle unit is positioned in the mixing area, the second stirring paddle unit is positioned in the flocculation area, and the rotating shaft rotates to drive the first stirring paddle unit and the second stirring paddle unit to rotate so that the water flow velocity in the mixing area is greater than the water flow velocity in the flocculation area. Therefore, when the flocculation equipment is required to work, the first stirring paddle unit and the second stirring paddle unit can be driven to rotate simultaneously only by driving the rotating shaft so as to realize the stirring requirement. Therefore, the flocculation equipment is convenient to operate, simple in mechanical structure and low in energy consumption.

Description

Flocculation equipment and wastewater treatment system

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to flocculation equipment and a wastewater treatment system.

Background

The coagulation sedimentation technology occupies an important position in the water treatment technology, and colloidal substances which cannot be removed in a natural sedimentation mode in the wastewater can be treated by the method.

Generally, the purification equipment used in the coagulating sedimentation technology mainly comprises: mixing tank, flocculation tank, sedimentation tank, set up in mixing tank's first agitator and set up in flocculation tank's second agitator, its theory of operation is as follows: the waste water is discharged into the mixing tank, the coagulant is put into the mixing tank, the first stirrer is used for stirring to enable colloid particles in the waste water to be coagulated and destabilized, then, the waste water is discharged into the flocculation tank, the flocculant is put into the flocculation tank, the second stirrer is used for stirring to enable colloid and dispersion particles in the waste water to generate floccules under the interaction of molecular force, the floccules collide with each other to be coagulated, the size and the quality of the floccules are continuously increased, finally, the waste water containing the floccules is discharged into the sedimentation tank, and the floccules in the sedimentation tank are separated from water phase sediment under the action of gravity, so that the waste water purifying effect is finally realized. However, in the above purification apparatus, since the mixing tank, the flocculation tank, and the sedimentation tank are separately and individually designed, this causes an increase in the floor space, resulting in an increase in the purification cost. In order to overcome the problems, a tank type coagulation separator integrating mixing, flocculation and sedimentation has been developed on the market, which can effectively reduce the occupied area of the whole purifying equipment, but the tank type coagulation separator has larger energy consumption and more complicated operation process.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a flocculation apparatus and a wastewater treatment system that are easy to operate and have low energy consumption.

A flocculation apparatus, comprising: the stirring device comprises a barrel and a stirring mechanism, wherein a cavity is formed in the barrel, the cavity comprises a mixing area and a flocculation area which are communicated, the stirring mechanism is inserted in the cavity, the stirring mechanism comprises a rotating shaft and a first stirring paddle unit and a second stirring paddle unit which are sequentially arranged on the rotating shaft, the first stirring paddle unit is positioned in the mixing area, the second stirring paddle unit is positioned in the flocculation area, and the rotating shaft rotates to drive the first stirring paddle unit and the second stirring paddle unit to rotate so that the water flow velocity in the mixing area is larger than the water flow velocity in the flocculation area.

In the flocculation equipment, because the cavity in the cylinder body is divided into the mixing area and the flocculation area which are communicated, the rotating shaft is inserted in the cavity, and the first stirring paddle unit and the second stirring paddle unit are arranged on the rotating shaft, wherein the first stirring paddle unit is positioned in the mixing area, the second stirring paddle unit is positioned in the flocculation area, and when the first stirring paddle unit and the second stirring paddle unit rotate, the water flow speed in the mixing area is greater than the water flow speed in the flocculation area, and therefore, the flocculation equipment can simultaneously meet the condition of mixing the medicines in the mixing area and the flocculation area, and therefore, when the flocculation equipment is required to work, the first stirring paddle unit and the second stirring paddle unit can be simultaneously rotated only by driving the rotating shaft so as to realize the stirring requirement. Therefore, the flocculation equipment is convenient to operate, simple in mechanical structure and low in energy consumption.

The technical scheme is further described as follows:

in one embodiment, the first stirring paddle unit includes a first stirring paddle, the second stirring paddle unit includes a second stirring paddle, a third stirring paddle and a fourth stirring paddle which are sequentially arranged at intervals along the axial direction of the rotating shaft, wherein the second stirring paddle is adjacent to the first stirring paddle, the number of paddles of the first stirring paddle is greater than the number of paddles of the second stirring paddle, the number of paddles of the second stirring paddle is greater than the number of paddles of the third stirring paddle, and the number of paddles of the third stirring paddle is greater than the number of paddles of the fourth stirring paddle.

In one embodiment, the blade of the third stirring paddle is provided with a first perforation, the blade of the fourth stirring paddle is provided with a second perforation, and the area of the second perforation is larger than that of the first perforation.

In one embodiment, the wall of the barrel is sequentially provided with a water inlet, a coagulant port, a flocculant port and a water outlet from bottom to top, the water inlet and the coagulant port are both positioned in the mixing area and are both communicated with the mixing area, the flocculant port and the water outlet are respectively positioned at two ends of the flocculation area and are both communicated with the flocculation area, and the water outlet is positioned at one side of the fourth stirring paddle deviating from the third stirring paddle.

The present application also provides a wastewater treatment system, comprising: the flocculation equipment of jar body and claim 4, be formed with the sedimentation chamber in the jar body, the barrel is located the sedimentation intracavity, just the outlet with the sedimentation chamber is linked together, the jar wall of the jar body is equipped with the leakage fluid dram, and follows the direction of height of the jar body the height of leakage fluid dram is less than the height of outlet.

In one embodiment, the wastewater treatment system further comprises a water inlet pipe, the tank wall of the tank body is further provided with a mounting port, one end of the water inlet pipe penetrates through the mounting port to be communicated with the water inlet, and the other end of the water inlet pipe is provided with a liquid inlet for introducing wastewater;

and/or, the wastewater treatment system further comprises two medicine feeding pipes, two medicine feeding ports are further formed in the tank wall of the tank body, the two medicine feeding pipes are all arranged at the medicine feeding ports in a penetrating mode, one medicine feeding pipe is communicated with the coagulant port, and the other medicine feeding pipe is communicated with the flocculant port.

In one embodiment, the wastewater treatment system further comprises an annular water baffle and an inclined tube assembly, wherein the annular water baffle is arranged in the sedimentation cavity and sleeved outside the cylinder body at intervals, a drainage channel is formed between the cylinder body and the annular water baffle, the drainage channel is communicated with the drainage outlet and the sedimentation cavity, and the inclined tube assembly is clamped between the wall of the tank body and the annular water baffle and is arranged around the annular water baffle.

In one embodiment, the inclined tube assembly comprises a plurality of inclined tubes which are arranged in parallel, the two ends of each inclined tube are the same in distance from the annular water retaining member, and the inclined direction of each inclined tube is opposite to the rotation direction of the rotating shaft;

and/or, the annular water retaining piece is of a circular ring structure, the cylinder body and the tank body are of cylindrical structures, and the cylinder body and the annular water retaining piece are arranged at the center of the tank body.

In one embodiment, the wastewater treatment system further comprises a water collecting piece, wherein the water collecting piece is arranged in the sedimentation cavity and is positioned above the inclined tube assembly, the water collecting piece surrounds the annular water retaining piece, an annular water collecting tank is arranged in the water collecting piece, a water collecting hole is formed in the water collecting piece, the water collecting hole is communicated with the annular water collecting tank and the sedimentation cavity, and the annular water collecting tank is communicated with the liquid draining port.

In one embodiment, a mud bucket is arranged in the tank body, the mud bucket is positioned at the bottom of the sedimentation cavity, and a mud discharge opening is formed in the bottom of the mud bucket.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale. In the drawings:

FIG. 1 is a schematic view of a flocculation apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a wastewater treatment system according to an embodiment of the present utility model.

The elements in the figures are labeled as follows:

10. a wastewater treatment system; 100. a flocculation device; 110. a cylinder; 111. a cavity; 1111. a mixing zone; 1112. a flocculation zone; 112. a water inlet; 113. a coagulant port; 114. a flocculant port; 115. a water outlet; 120. a stirring mechanism; 121. a rotating shaft; 122. a first paddle unit; 1221. a first stirring paddle; 123. a second paddle unit; 1231. a second stirring paddle; 1232. a third stirring paddle; 12321. a first perforation; 1233. a fourth stirring paddle; 12331. a second perforation; 124. a motor; 200. a tank body; 210. a sedimentation chamber; 211. a liquid outlet; 212. a mounting port; 213. a medicine inlet; 214. an exhaust port; 215. a manhole; 220. a water inlet pipe; 230. a medicine inlet pipe; 240. an annular water blocking member; 250. a chute assembly; 260. a water collecting member; 261. an annular water collection tank; 270. a mud bucket; 271. a mud discharging port.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1, one embodiment of the present application provides a flocculation apparatus 100, comprising: barrel 110 and stirring mechanism 120. A cavity 111 is formed in the cylinder 110, the cavity 111 including a mixing zone 1111 and a flocculation zone 1112 in communication. The stirring mechanism 120 is inserted into the cavity 111. And the stirring mechanism 120 comprises a rotating shaft 121, and a first stirring paddle unit 122 and a second stirring paddle unit 123 which are sequentially arranged on the rotating shaft 121. The first paddle unit 122 is located within the mixing zone 1111 and the second paddle unit 123 is located within the flocculation zone 1112. Rotation of the shaft 121 rotates the first and second paddle units 122 and 123 such that the water flow rate in the mixing zone 1111 is greater than the water flow rate in the flocculation zone 1112.

In the flocculation apparatus 100 described above, since the cavity 111 in the cylinder 110 is divided into the mixing zone 1111 and the flocculation zone 1112 which are communicated, the rotation shaft 121 is inserted in the cavity 111, and the rotation shaft 121 is provided with the first stirring paddle unit 122 and the second stirring paddle unit 123, wherein the first stirring paddle unit 122 is located in the mixing zone 1111, and the second stirring paddle unit 123 is located in the flocculation zone 1112, and when the first stirring paddle unit 122 and the second stirring paddle unit 123 rotate, the water flow velocity in the mixing zone 1111 is greater than the water flow velocity in the flocculation zone 1112, it can be seen that the flocculation apparatus 100 can simultaneously satisfy the conditions of mixing the medicaments in the mixing zone 1111 and the flocculation zone 1112, therefore, when the flocculation apparatus 100 needs to be operated, only the rotation shaft 121 needs to be driven to rotate the first stirring paddle unit 122 and the second stirring paddle unit 123 simultaneously to achieve the above stirring requirements. As can be seen, the flocculation apparatus 100 is simple and convenient to operate, has a simple mechanical structure and is low in energy consumption.

Referring to fig. 1, in an embodiment, the stirring mechanism 120 further includes a motor 124, and an output end of the motor 124 is connected to the rotating shaft 121. Accordingly, the rotation shaft 121 is rotated in a clockwise or counterclockwise direction when the motor 124 is started, so that the first and second pulsator units 122 and 123 are simultaneously rotated to agitate the wastewater in the tub 110.

In the coagulation technology, the mixing tank is mainly used for rapidly and uniformly mixing the medicament and the wastewater so as to coagulate and destabilize colloid particles in the wastewater, so that the mixing process needs to be strong, rapid and short, and the medicament is uniformly dispersed into the wastewater in the shortest time possible, and thus the water flow in the mixing tank is required to generate accumulated turbulence. The flocculation tank is mainly used for effectively colliding fine particles so as to gradually grow into large particles for subsequent sedimentation operation, and therefore, the turbulence of water flow in the flocculation tank is required to be soft and uniform.

In order to achieve the above object with only one rotation shaft 121, in one embodiment, as shown in fig. 1, the first paddle unit 122 includes a first paddle 1221. The second paddle unit 123 includes a second paddle 1231, a third paddle 1232, and a fourth paddle 1233 that are sequentially disposed at intervals in the axial direction of the rotation shaft 121. Wherein the second stirring paddle 1231 is disposed adjacent to the first stirring paddle 1221. The first stirring paddle 1221 has a greater number of blades than the second stirring paddle 1231, the second stirring paddle 1231 has a greater number of blades than the third stirring paddle 1232, and the third stirring paddle 1232 has a greater number of blades than the fourth stirring paddle 1233. Thus, when the rotation shaft 121 rotates, the rotation speed of the wastewater in the mixing zone 1111 can be made larger than that of the wastewater in the flocculation zone 1112. At the same time, the water flow velocity tends to decrease and turbulence tends to be gentle in the flocculation zone 1112 from the position of the second stirring paddle 1231 to the position of the fourth stirring paddle 1233. It can be seen that when stirring mechanism 120 is operated, an effective velocity gradient difference is formed in the wastewater in the drum 110 of flocculation apparatus 100, so that the wastewater is subjected to the zonal mixing and flocculation operation.

Optionally, in other embodiments, the first paddle unit 122 comprises at least one first paddle 1221. The second paddle unit 123 may include only the second paddle 1231 or the third paddle 1232 or the fourth paddle 1233 or a combination of any two of the three, or the second paddle unit 123 may include more than the second paddle 1231, the third paddle 1232, and the fourth paddle 1233.

To further soften the flow of water in the flocculation zone 1112 from the location of the second paddle 1231 to the location of the fourth paddle 1233, further, in one embodiment, as shown in fig. 1, the blades of the third paddle 1232 are provided with first perforations 12321 and the blades of the fourth paddle 1233 are provided with second perforations 12331. And the second perforation 12331 has an area larger than that of the first perforation 12321. In this way, the turbulence of the water flow can be reduced by reducing the effective area of the blade that is in contact with the wastewater.

Specifically, in the present embodiment, each blade of the third stirring paddle 1232 is provided with a plurality of first perforations 12231, each blade of the fourth stirring paddle 1233 is provided with only one second perforation 12331, and the area of the second perforation 12331 is larger than the sum of the areas of the plurality of first perforations 12231.

In one embodiment, the wall of the barrel 110 is provided with a water inlet 112, a coagulant outlet 113, a flocculant outlet 114 and a water outlet 115 from bottom to top. The water inlet 112 and the coagulant outlet 113 are both located in the mixing zone 1111 and both communicate with the mixing zone 1111. Flocculant port 114 and drain port 115 are located at each end of flocculation zone 1112 and are in communication with flocculation zone 1112. And the drain port 115 is located on a side of the fourth paddle 1233 facing away from the third paddle 1232. In this way, the cylinder 110 can be regarded as a column structure extending along the vertical direction, and the mixing zone 1111 and the flocculation zone 1112 are longitudinally arranged, so that the occupied area of the cylinder 110 can be effectively reduced.

Referring to fig. 1 and 2, the present application also provides a wastewater treatment system 10 comprising: tank 200 and flocculation apparatus 100 as described above. A settling chamber 210 is formed within the tank 200. The cylinder 110 is disposed in the settling chamber 210, and the drain 115 communicates with the settling chamber 210. The tank wall of the tank 200 is provided with a drain port 211, and the height of the drain port 211 is lower than the height of the drain port 115 in the height direction of the tank 200.

In the above-described wastewater treatment system 10, when wastewater is introduced into the cylinder 110 from the water inlet 112 and coagulant and flocculant are introduced into the cylinder 110, flock is formed in the wastewater by the first and second stirring paddle units 122 and 123. Since the cylinder 110 is disposed in the settling chamber 210 and the water outlet 115 of the cylinder 110 is in communication with the settling chamber 210, the wastewater carrying the flock can be directly discharged from the water outlet 115 into the settling chamber 210 for settling, thereby completing solid-liquid separation. And the separated and purified water can be directly discharged out of the tank body 200 from the liquid outlet 211, thereby realizing water quality purification. It can be seen that the wastewater treatment system 10 is effective in purifying water, while the wastewater treatment system 10 occupies a smaller area, resulting in less capital investment.

Referring to fig. 1 and 2, in one embodiment, the wastewater treatment system 10 further includes a water inlet pipe 220. The tank wall of the tank 200 is also provided with a mounting opening 212. And one end of the water inlet pipe 220 penetrates through the mounting port 212 to be communicated with the water inlet 112, and the other end of the water inlet pipe 220 is provided with a liquid inlet for introducing wastewater.

To facilitate the addition of the medicament to the cartridge 110, in particular, in this embodiment, as shown in fig. 1 and 2, the wastewater treatment system 10 further includes a medicament inlet tube 230, and the medicament inlet tube 230 is provided with two. The tank wall of the tank body 200 is also provided with a medicine inlet 213, and two medicine inlet pipes 230 are respectively arranged at the medicine inlet 213 in a penetrating way. And one of the feed pipes 230 is communicated with the coagulant inlet 113, and the other feed pipe 230 is communicated with the coagulant inlet 114.

Referring to fig. 1 and 2, in one embodiment, the wastewater treatment system 10 further includes an annular water deflector 240 and a beveled pipe assembly 250. The annular water baffle 240 is disposed in the sedimentation chamber 210 and is spaced apart from the barrel 110. A drainage channel is formed between the cylinder 110 and the annular water blocking member 240, and the drainage channel is communicated with the drainage outlet 115 and the sedimentation chamber 210. The chute assembly 250 is sandwiched between the tank wall of the tank 200 and the annular water deflector 240 and disposed about the annular water deflector 240. By providing the chute assembly 250, the settling distance can be shortened, the coalescing area can be increased, the throughput and separation efficiency can be improved, and meanwhile, the mutual disturbance of the water bodies in the settling chamber 210 can be reduced, which is beneficial to the sedimentation and coalescence of the floccules.

In one embodiment, the chute assembly 250 comprises a plurality of chute tubes disposed parallel to one another. The two ends of the inclined tube are at the same distance from the annular water guard 240, and the inclined direction of the inclined tube is opposite to the direction of rotation of the rotation shaft 121. In this way, the probability that the wastewater containing the floccule directly enters the inclined tube assembly 250 in a large amount in the flowing process can be reduced, and the reliability of the inclined tube assembly 250 for intercepting the floccule is further improved.

Specifically, the inclined tube forms an angle of 60 ° with the horizontal plane.

In an embodiment, the annular water stop 240 has a circular ring structure, the cylinder 110 and the tank 200 have a cylindrical structure, and the cylinder 110 and the annular water stop 240 are disposed at the center of the tank 200. Thus, after the wastewater is discharged from the drainage channel, the wastewater can reach the tank walls around the tank body 200 at the same time when flowing in the sedimentation cavity 210, so that the phenomenon of short flow is avoided, and the improvement of the sedimentation surface load is facilitated.

Referring to FIG. 2, in one embodiment, the wastewater treatment system 10 further includes a water collection member 260. The water collecting piece 260 is disposed in the settling chamber 210 above the inclined tube assembly 250, and the water collecting piece 260 is disposed around the annular water blocking piece 240. An annular water collection tank 261 is provided in the water collection member 260. And the water collecting piece 260 is provided with a water collecting hole which is communicated with the annular water collecting groove 261 and the sedimentation cavity 210. And the annular water collection tank 261 communicates with the liquid discharge port 211. In this process, the wastewater containing flock is precipitated in the tank 200, filtered by the inclined tube assembly 250, and the purified water directly enters the annular water collecting tank 261 from the water collecting hole, and finally is discharged from the liquid outlet 211.

To facilitate collection of flock in the settling tank, in one embodiment, as shown in fig. 2, a sludge hopper 270 is disposed in the tank 200, the sludge hopper 270 is disposed at the bottom of the settling chamber 210, and a sludge discharge port 271 is disposed at the bottom of the sludge hopper 270.

In one embodiment, as shown in FIG. 2, the tank wall of the tank 200 is provided with a vent 214 and a manhole 215. And both the vent 214 and the manhole 215 are in communication with the settling chamber 210. The exhaust port 214 is used for exhausting the gas generated in the sedimentation chamber 210, so that the internal and external pressures of the tank 200 are equivalent. When the wastewater treatment system 10 is damaged, service personnel can access the interior of the tank 200 through the manhole 215 for repair or maintenance.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A flocculation apparatus, comprising: the stirring device comprises a barrel and a stirring mechanism, wherein a cavity is formed in the barrel, the cavity comprises a mixing area and a flocculation area which are communicated, the stirring mechanism is inserted in the cavity, the stirring mechanism comprises a rotating shaft and a first stirring paddle unit and a second stirring paddle unit which are sequentially arranged on the rotating shaft, the first stirring paddle unit is positioned in the mixing area, the second stirring paddle unit is positioned in the flocculation area, and the rotating shaft rotates to drive the first stirring paddle unit and the second stirring paddle unit to rotate so that the water flow velocity in the mixing area is larger than the water flow velocity in the flocculation area.

2. The flocculation apparatus according to claim 1, wherein the first stirring paddle unit includes a first stirring paddle, the second stirring paddle unit includes a second stirring paddle, a third stirring paddle and a fourth stirring paddle which are sequentially arranged at intervals along the axial direction of the rotation shaft, wherein the second stirring paddle is arranged adjacent to the first stirring paddle, the number of paddles of the first stirring paddle is larger than the number of paddles of the second stirring paddle, the number of paddles of the second stirring paddle is larger than the number of paddles of the third stirring paddle, and the number of paddles of the third stirring paddle is larger than the number of paddles of the fourth stirring paddle.

3. Flocculation apparatus according to claim 2, wherein the blades of the third stirring paddle are provided with first perforations, the blades of the fourth stirring paddle are provided with second perforations, and the area of the second perforations is larger than the area of the first perforations.

4. A flocculation apparatus as claimed in claim 2 or 3, wherein the wall of the cylinder is provided with a water inlet, a coagulant inlet, a flocculant inlet and a water outlet in order from bottom to top, the water inlet and the coagulant inlet are both located in the mixing zone and are both communicated with the mixing zone, the flocculant inlet and the water outlet are respectively located at both ends of the flocculation zone and are both communicated with the flocculation zone, and the water outlet is located at one side of the fourth stirring paddle away from the third stirring paddle.

5. A wastewater treatment system, comprising: the flocculation equipment of jar body and claim 4, be formed with the sedimentation chamber in the jar body, the barrel is located the sedimentation intracavity, just the outlet with the sedimentation chamber is linked together, the jar wall of the jar body is equipped with the leakage fluid dram, and follows the direction of height of the jar body the height of leakage fluid dram is less than the height of outlet.

6. The wastewater treatment system according to claim 5, further comprising a water inlet pipe, wherein a tank wall of the tank body is further provided with a mounting port, one end of the water inlet pipe penetrates through the mounting port to be communicated with the water inlet, and the other end of the water inlet pipe is provided with a liquid inlet for introducing wastewater;

and/or, the wastewater treatment system further comprises two medicine feeding pipes, two medicine feeding ports are further formed in the tank wall of the tank body, the two medicine feeding pipes are all arranged at the medicine feeding ports in a penetrating mode, one medicine feeding pipe is communicated with the coagulant port, and the other medicine feeding pipe is communicated with the flocculant port.

7. The wastewater treatment system of claim 5 or 6, further comprising an annular water deflector disposed within the settling chamber and spaced apart from the barrel, wherein a drainage channel is formed between the barrel and the annular water deflector, wherein the drainage channel communicates with the drain opening and the settling chamber, and an inclined tube assembly disposed between the wall of the tank and the annular water deflector and surrounding the annular water deflector.

8. The wastewater treatment system of claim 7, wherein the chute assembly comprises a plurality of chute pipes arranged in parallel with each other, both ends of the chute pipes are at the same distance from the annular water deflector, and the direction of inclination of the chute pipes is opposite to the direction of rotation of the rotating shaft;

and/or, the annular water retaining piece is of a circular ring structure, the cylinder body and the tank body are of cylindrical structures, and the cylinder body and the annular water retaining piece are arranged at the center of the tank body.

9. The wastewater treatment system of claim 7, further comprising a water collection member disposed within the settling chamber and above the beveled pipe assembly, wherein the water collection member is disposed about the annular water deflector, wherein an annular water collection trough is disposed within the water collection member, wherein the water collection member is provided with a water collection aperture, wherein the water collection aperture is in communication with the annular water collection trough and the settling chamber, and wherein the annular water collection trough is in communication with the liquid drain.

10. The wastewater treatment system of claim 5 or 6, wherein a sludge hopper is arranged in the tank body, the sludge hopper is positioned at the bottom of the sedimentation cavity, and a sludge discharge port is arranged at the bottom of the sludge hopper.

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