CN216584548U - Sewage treatment device - Google Patents

Abstract

The utility model provides a sewage treatment device, which structurally comprises a box body, wherein a first sedimentation cavity and a third sedimentation cavity which are communicated by fluid are arranged in the box body; the water inlet pipe is communicated with a sewage source outside the box body and the first sedimentation cavity; the filtering part is arranged in the first sedimentation cavity; the dosing and mixing part is arranged in the third precipitation cavity; and the water outlet pipe is communicated with the inside and the outside of the box body and is used for discharging sewage treated by the filtering part and the dosing mixing part. The sewage treatment device can solve the problem of how to treat sewage effectively with low cost.

Description

Sewage treatment device

Technical Field

The application relates to the technical field of sewage treatment, in particular to a sewage treatment device.

Background

Sewage treatment refers to a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage.

The sewage discharge amount of industrial enterprises in China is at a higher level, and the sewage treatment problem of the industrial enterprises is always the first problem restricting the development of industrial economy. And current chemical wastewater treatment device is when carrying out the sedimentation treatment to chemical wastewater, and the superficial debris on the sewage liquid level enters into subsequent treatment facility easily, causes the trouble for subsequent treatment facility, and the sewage after the sediment need add the flocculating agent, and the in-process of adding the flocculating agent needs stir sewage and flocculating agent, nevertheless the stirring needs the energy consumption, and agitated vessel's input cost is higher, still needs often to maintain agitating unit for sewage treatment's cost is improved.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present application is to provide a sewage treatment device, which is used to solve the problem of how to effectively treat sewage at low cost.

According to the utility model provides a sewage treatment device, wherein, sewage treatment device includes: the device comprises a box body, a first sedimentation cavity and a third sedimentation cavity, wherein the first sedimentation cavity and the third sedimentation cavity are communicated with each other through fluid; the water inlet pipe is communicated with a sewage source outside the box body and the first sedimentation cavity; the filtering part is arranged in the first sedimentation cavity; the dosing and mixing part is arranged in the third precipitation cavity; and the water outlet pipe is communicated with the inside and the outside of the box body and is used for discharging sewage treated by the filtering part and the dosing mixing part.

Preferably, a second sedimentation cavity is further arranged in the box body, and the second sedimentation cavity is located between the first sedimentation cavity and the third sedimentation cavity and is respectively in fluid communication with the first sedimentation cavity and the third sedimentation cavity.

Preferably, a first partition plate, a second partition plate and a third partition plate which are sequentially spaced are arranged in the box body, the first settling chamber is defined by the first partition plate and the wall of the box body, the second settling chamber is defined by the first partition plate, the second partition plate and the wall of the box body, and the third settling chamber is defined by the first partition plate, the second partition plate and the wall of the box body.

Preferably, the filter part is disposed above the first settling chamber and includes: the first end of the filtering component is connected with the upper end of the first clapboard and is used for filtering floating impurities in the sewage; and one side of the flow baffle is connected with the second end of the filtering component, the water inlet pipe is positioned at the other side of the flow baffle, and the height of the top end of the flow baffle is greater than that of the highest end of the filtering component.

Preferably, the medicated mixing portion comprises: the first mixing part is arranged on one side of the second partition plate facing the third sedimentation chamber, and a plurality of baffle plates are arranged in the first mixing part; the second mixing part is communicated with the first mixing part, and a spiral plate is arranged in the second mixing part; and a medicine adding part which is arranged at the upper end of the first mixing part and is used for adding the medicine into the first mixing part.

Preferably, the first mixing part includes: a sidewall connected with the second partition; the first baffle plate is connected with the second partition plate; the second baffle plate is arranged on one surface of the side wall, which is opposite to the second partition plate; the third flow folding plate is connected with the second partition plate; the first baffler, the second baffler and the third baffler set gradually from top to bottom.

Preferably, the second mixing part includes: a mixing barrel in communication with the first mixing section; a first spiral plate arranged at the upper part in the mixing cylinder; the second spiral plate is arranged at the lower part in the mixing cylinder; the spiral direction of the first spiral plate is opposite to that of the second spiral plate.

Preferably, the medicated portion includes: a spray pipe provided with a plurality of spray heads facing the second partition and spaced apart from each other; and the liquid pump is connected with the spray pipe.

Preferably, a liquid inlet groove is formed in the top end of the second partition plate, the height of the bottom surface of the liquid inlet groove is smaller than that of the top surface of the first partition plate, the direction along which the first partition plate and the third partition plate are arranged is the first direction, the second direction is the direction perpendicular to the first direction and the height direction of the box body, the size of the liquid inlet groove in the second direction is smaller than that of the first mixing portion in the second direction, and/or the height of the top end of the third partition plate is smaller than that of the bottom end of the second mixing portion in the second direction.

Preferably, the sewage treatment device further comprises a discharge pipe, and the first sedimentation chamber, the second sedimentation chamber and the third sedimentation chamber are provided with the discharge pipe communicated with the outside of the tank body.

The sewage treatment device provided by the embodiment of the utility model is characterized in that a first clapboard, a second clapboard and a third clapboard which have the same width with the inside of the box body are sequentially arranged in the box body along a first direction, a first precipitation cavity, a second precipitation cavity and a third precipitation cavity are formed, a water inlet pipe discharges sewage into the first precipitation cavity from the outside, the sewage in the first precipitation cavity gradually accumulates and precipitates, the water surface height of the sewage gradually rises, the filtered floating impurities which are subjected to the filtering part after overflowing the filtering part are removed, and the sewage overflows from one side of the first clapboard and enters the second precipitation cavity, the sewage in the second precipitation cavity precipitates in the gradually accumulating process, the sewage overflows from one side of the second clapboard and enters the dosing mixing part after accumulating to a certain height, the sewage is added with a medicament in the dosing mixing part and is mixed with the medicament under the action of gravity in the dosing mixing part, and then the sewage added with the medicament precipitates in the third precipitation cavity, the upper clear liquid overflows from one side of the third partition plate to enter the side provided with the water outlet pipe and is discharged out of the tank body from the water outlet pipe, so that the problem of how to effectively treat sewage with low cost can be effectively solved.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic view of a sewage treatment apparatus according to the present invention.

FIG. 2 is a plan view of the chemical adding and mixing part of the sewage treatment apparatus according to the present invention.

Fig. 3 is a partial enlarged view of the sewage treatment apparatus according to the present invention.

Reference numerals: 1-a first separator; 11-a first settling chamber; 2-a second separator; 21-a second sedimentation chamber; 22-a liquid inlet tank; 3-a third separator; 31-a third settling chamber; 4-a box body; 5-a filter part; 51-a filter element; 52-a flow baffle; 6-a medicine adding and mixing part; 61-a first mixing section; 611-a first baffle; 612-a second baffle plate; 613-third baffle plate; 614-side wall; 62-a second mixing section; 621-a first spiral plate; 622-second spiral plate; 623-mixing cylinder; 63-a medicine adding part; 631-a nozzle; 632-a spray head; 633-liquid pump; 7-water inlet pipe; 8-water outlet pipe; 9-a discharge pipe; 91-drainage chamber.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

The utility model provides a sewage treatment device, as shown in fig. 1 to fig. 3, this sewage treatment device includes box 4, filtering part 5, adds medicine mixing portion 6, inlet tube 7 and outlet pipe 8.

In the following description, a specific structure of the above-described components of the sewage treatment apparatus and a connection relationship of the above-described components will be specifically described with reference to fig. 1 to 3.

As shown in fig. 1, in an embodiment, the box 4 may be a rectangular parallelepiped structure, a first partition plate 1, a second partition plate 2, and a third partition plate 3 having a width equal to that of the interior of the box 4 are sequentially disposed in a first direction in the interior of the box 4, where the first direction may be a length direction of the box 4, and a first settling chamber 11 is formed between the first partition plate 1 and a left side wall (for convenience of description, a direction close to a side of the water inlet pipe 7 is left, and a direction close to a side of the water outlet pipe 8 is right) of the box 4, that is, the first partition plate 1, a left side wall of the box 4, and a first portion of an inner wall of the box 4 connected to the first partition plate 1 together enclose the first settling chamber 11; a second sedimentation cavity 21 is formed between the second partition plate 2 and the first partition plate 1, namely the second sedimentation cavity 21 is defined by the second partition plate 2, the first partition plate 1 and the second part of the inner wall of the box body 4; a third settling chamber 31 is formed between the third partition plate 3 and the second partition plate 2, namely, the third settling chamber 31 is defined by the third partition plate 3, the second partition plate 2 and a third part of the inner wall of the box body 4.

In the embodiment, the water inlet pipe 7 is communicated with the first settling chamber 11 and the outside of the box body 4 and is used for discharging sewage into the first settling chamber 11, and the filtering part 5 is arranged at the upper part of the first settling chamber 11, is connected with the side surface of the first partition plate 1 facing the first settling chamber 11 and is used for filtering floating impurities in the sewage discharged into the first settling chamber 11; the chemical adding and mixing part 6 is connected with the second partition plate 2, and the chemical adding and mixing part 6 is arranged on one side of the second partition plate 2 facing the third settling chamber 31 and used for adding and mixing chemicals into the sewage flowing from the second settling chamber 21 to the third settling chamber 31. The water outlet pipe 8 is arranged on one side of the third partition plate 3 far away from the third settling chamber 31, as shown in fig. 1, the third partition plate 3, the right side wall of the box 4 and the fourth part inner wall of the box 4 connected with the third partition plate 3 jointly enclose a drainage chamber 91, one end of the water outlet pipe 8 is located in the drainage chamber 91, and the other end of the water outlet pipe is communicated with the outside of the box 4 and used for discharging the treated sewage in the drainage chamber 91.

Specifically, in the embodiment, the first partition board 1, the second partition board 2 and the third partition board 3 may be square boards, and the three boards partition the inside of the rectangular box 4 to form four cavities, i.e., the first settling chamber 11, the second settling chamber 21, the third settling chamber 31 and the drainage chamber 91. The box 4 may be an uncapped rectangular parallelepiped box as shown in fig. 1, and the water inlet pipe 7 may be embedded in the upper portion of the left side wall of the box 4 or erected on the top end of the left side wall of the box 4 while being bent by 90 °.

Preferably, in the embodiment, as shown in fig. 1, the filter part 5 includes a filter member 51, the filter member 51 may be a square filter plate, and a first end (i.e., a right end) of the filter member 51 is connected to an upper end of the first partition plate 1, and has a width equal to a width of the inside of the case 4, where the width is a dimension in a direction perpendicular to a paper surface. The water outlet of the water inlet pipe 7 for discharging water to the first settling chamber 11 can be vertically downward and is aligned with the first settling chamber 11. The inlet pipe 7 discharges the sewage into the first sedimentation chamber 11 for sedimentation, when the sewage in the first sedimentation chamber 11 is accumulated to a certain height, the upper liquid thereof flows over the filter element 51 and flows from the first sedimentation chamber 11 on the left side of the first partition board 1 to the second sedimentation chamber 21 on the right side of the first partition board 1, and in the process that the sewage passes through the filter element 51, the floating impurities in the sewage are filtered by the filter element 51.

Further, preferably, the filtering portion 5 further includes a flow baffle plate 52, the flow baffle plate 52 may be a square plate having the same width as the inside of the box 4 as shown in fig. 1, and is disposed obliquely with respect to the filtering member 51 (i.e., not parallel to the filtering member 51), a right side surface of the flow baffle plate 52 is fixedly connected to a second end (i.e., a left end) of the filtering member 51, and the water inlet pipe 7 is located at a left side of the flow baffle plate 52. When the height of sewage is greater than the height of filter element 51 in first sedimentation chamber 11, keep off the flow board 52 and can block the sewage of its left surface for sewage can't flow to second sedimentation chamber 21 from the filterable route of filter element 51, and then guarantee filter element 51's filtration miscellaneous effect that floats, for making filter element 51 no matter level setting or slope setting, keep off flow board 52 homoenergetic and play its function, can make the top of keeping off flow board 52 be higher than filter element 51's highest end, take place with this phenomenon that the top of avoiding unfiltered sewage to overflow the flow board 52 and flow to second sedimentation chamber 21.

Further, it is preferable that the medicated mixing portion 6 includes a first mixing portion 61, a second mixing portion 62, and a medicated portion 63, as shown in fig. 1 to 3. The first mixing part 61 may be a square box disposed on one side (i.e., right side) of the second partition plate 2 facing the third settling chamber 31, a plurality of baffle plates are disposed in the first mixing part 61, and the second mixing part 62 is a cylindrical structure communicated with the first mixing part 61 and internally mounted with one or more spiral plates.

Specifically, the first mixing portion 61 may be installed at the upper end of the right side of the second partition 2, the second mixing portion 62 is communicated with the bottom of the first mixing portion 61, and the chemical adding portion 63 may be located at the end of the first mixing portion 61, so that a chemical agent, which may be a flocculating agent corresponding to the composition of the sewage, may be added into the sewage in the first mixing portion 61 at the first time.

Further, as shown in fig. 1 to 3, the first mixing portion 61 preferably includes a side wall 614, a first baffle 611, a second baffle 612 and a third baffle 613. The side wall 614 is fixedly connected with the right side surface of the second partition board 2, the two form a box body with an open top surface, and the sewage in the second settling chamber 21 flows in from the open top surface of the box body. Three baffles may be provided inside the case as shown in fig. 3, wherein one ends of the first and third baffles 611 and 613 are fixed to the right side surface of the second partition 2, the other ends of the first and third baffles 611 and 613 are spaced apart from the side wall 614, one end of the second baffle plate 612 is fixed to the inner side surface of the sidewall 614 opposite to the right side surface of the second partition plate 2, the other end of the second baffle plate 612 is spaced from the right side surface of the second partition plate 2, the first baffle plate 611, the second baffle plate 612 and the third baffle plate 613 are square plates having the same width as the inside of the sidewall 614 and are sequentially arranged from top to bottom, and a gap for water to pass through is reserved between two adjacent plates of the three plates, and a serpentine gap is formed from the lower side of the first baffle plate 611 to the third baffle plate 613, when the mixed liquid of the sewage and the chemical passes through the first mixing part 61, the mixed liquid is repeatedly deflected to uniformly mix the sewage and the chemical. Preferably, the first baffle 611 and the third baffle 613 may be symmetrically disposed with respect to the second baffle 612, so that the mixed liquid can be more uniformly mixed when flowing through the inside of the first mixing part 61.

Preferably, as shown in fig. 1 and 2, the top end of the second partition plate 2 may be opened with a square liquid inlet groove 22, so that when the sewage in the second settling chamber 21 is accumulated to a certain height, the sewage can flow into the opening of the top surface of the first mixing portion 61 through the liquid inlet groove 22 at the top end of the second partition plate 2 as much as possible, and in order to allow the sewage to flow into the first mixing portion 61, the size of the liquid inlet groove 22 in the direction perpendicular to the paper surface direction of fig. 1 is smaller than the width of the first mixing portion 61 in the direction perpendicular to the paper surface direction of fig. 1.

Further, preferably, as shown in fig. 1 to 3, the dosing part 63 may include a nozzle 631, a spray head 632, and a liquid pump 633. When the sewage flows into the first mixing part 61 through the liquid inlet groove 22, a thin strip-shaped water flow is formed between the liquid inlet groove 22 and the first baffle 611, the nozzle 631 is positioned at the side of the upper end of the inside of the first mixing part 61, which is far away from the second partition 2, the length of the nozzle is the same as the width of the first mixing part 61, the axial direction of the nozzle 631 is parallel to the length direction of the liquid inlet groove 22, the nozzle 631 is connected with a plurality of nozzles 632, and the nozzles of the nozzles 632 face the right side surface of the second partition 2. Preferably, the spray heads 632 are uniformly arranged along the axial direction of the nozzles 631 such that the chemicals sprayed in the spray heads 632 can be uniformly mixed into the sewage, and the liquid pump 633 is disposed at the upper end of the case 4 and communicates with the nozzles 631 to supply the chemicals for spraying to the spray heads 632. The chemicals and the sewage are mixed in the first mixing part 61 by repeated baffling of the baffle plates, and then the mixture is mixed in the second mixing part 62 from the bottom of the first mixing part 61.

Preferably, as shown in fig. 1 and 3, in an embodiment, the second mixing part 62 may include a mixing cylinder 623, a first spiral plate 621, and a second spiral plate 622. The mixing cylinder 623 may be a cylindrical cylinder with a top end communicating with the bottom of the first mixing part 61, the first spiral plate 621 is embedded in the upper half of the interior of the mixing cylinder 623, the second spiral plate 622 is embedded in the lower half of the interior of the mixing cylinder 623, and the first spiral plate 621 and the second spiral plate 622 may not be completely located in the interior of the mixing cylinder 623, for example: the upper end of the first spiral plate 621 may be partially positioned inside the first mixing part 61, and the lower end of the first spiral plate 621 may also partially protrude out of the mixing cylinder 623.

In addition, the spiral direction of the first spiral plate 621 is preferably opposite to the spiral direction of the second spiral plate 622, and may be a clockwise direction from top to bottom of the first spiral plate 621 and a counterclockwise direction from top to bottom of the second spiral plate 622, as shown in fig. 3. When the mixed liquid of the sewage and the chemical flows into the second mixing portion 62, the mixed liquid passes through the first spiral plate 621 and the second spiral plate 622 inside the mixing cylinder 623 and finally flows into the third settling chamber 31, and the mixed liquid spirally descends due to the guiding action of the spiral plates in the process of flowing through the first spiral plate 621 and the second spiral plate 622, and the mixed liquid is further uniformly mixed in the second mixing portion 62 due to the collision between the liquids caused by the change of the flow direction.

Further, preferably, in the embodiment, as shown in fig. 1, the sewage treatment apparatus further comprises a discharge pipe 9, wherein the discharge pipe 9 is provided at the bottom of each of the first settling chamber 11, the second settling chamber 21 and the third settling chamber 31, and the discharge pipe 9 communicates the settling chambers with the outside of the tank 4 for discharging the sediment accumulated in the settling chambers therefrom.

During the specific use, sewage flows into first precipitation chamber 11 by inlet tube 7 earlier, carries out the first sediment in first precipitation chamber 11, and the supernatant fluid of the sewage that accumulates in first precipitation chamber 11 is through filtering component 51's filtration back, overflows first baffle 1 and flows into second precipitation chamber 21 to carry out the second and deposit in second precipitation chamber 21. After the sewage is accumulated in the second sedimentation chamber 21 to reach the height of the bottom surface of the liquid inlet groove 22, the upper layer liquid in the second sedimentation chamber 21 flows to the dosing mixing part 6 on the right side of the second partition plate 2 through the liquid inlet groove 22. Sewage forms thin banding rivers in first mixing portion 61 to flow to second mixing portion 62, add medicine portion 63 then add medicine to rivers, and medicament and sewage are by first mixing portion 61 and the even mixing of second mixing portion 62 under the effect of self gravity, and carry out the third and deposit in flowing into third precipitation chamber 31. When the added sewage is accumulated to a height higher than the upper end surface of the third partition plate 3 in the third settling cavity 31, the supernatant flows to the drainage cavity 91 at the right side of the third partition plate 3 through the third partition plate 3 and is discharged out of the box body 4 by the water outlet pipe 8 in the drainage cavity 91, and the sediment accumulated in each settling cavity is discharged by the discharge pipe 9 at the bottom of each settling cavity, so that the sewage is effectively treated at low cost.

In addition, preferably, in order to prevent the sewage from flowing back to the first settling chamber 11 due to excessive accumulation when the sewage is accumulated in the second settling chamber 21 and from overflowing into the second mixing portion 62 when the sewage is accumulated in the third settling chamber 31, and thus the uniform mixing of the chemical and the sewage is not affected, the height of the bottom surface of the liquid inlet groove 22 may be smaller than the height of the top surface of the first partition plate 1, and the height of the top end of the third partition plate 3 may be smaller than the height of the bottom end of the second mixing portion 62.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A sewage treatment apparatus, characterized by comprising:

the device comprises a box body, a first sedimentation cavity and a third sedimentation cavity, wherein the first sedimentation cavity and the third sedimentation cavity are communicated with each other through fluid;

the water inlet pipe is communicated with a sewage source outside the box body and the first sedimentation cavity;

the filtering part is arranged in the first sedimentation cavity;

the dosing and mixing part is arranged in the third precipitation cavity; and

and the water outlet pipe is communicated with the inside and the outside of the box body and is used for discharging sewage which is treated by the filtering part and the dosing mixing part.

2. The wastewater treatment device according to claim 1, wherein a second settling chamber is further disposed in the tank, and the second settling chamber is located between the first settling chamber and the third settling chamber and is in fluid communication with the first settling chamber and the third settling chamber, respectively.

3. The wastewater treatment device according to claim 2, wherein a first partition plate, a second partition plate and a third partition plate are arranged in the tank body and spaced in sequence, the first settling chamber is defined by the first partition plate and the wall of the tank body, the second settling chamber is defined by the first partition plate, the second partition plate and the wall of the tank body, and the third settling chamber is defined by the first partition plate, the second partition plate and the wall of the tank body.

4. The wastewater treatment apparatus according to claim 3, wherein the filtering portion is disposed above the first settling chamber and includes:

the first end of the filtering component is connected with the upper end of the first clapboard and is used for filtering floating impurities in the sewage; and

the flow baffle plate is characterized in that one side of the flow baffle plate is connected with the second end of the filtering component, the water inlet pipe is positioned on the other side of the flow baffle plate, and the height of the top end of the flow baffle plate is larger than that of the highest end of the filtering component.

5. The sewage treatment apparatus according to claim 3, wherein the chemical-adding mixing portion comprises:

the first mixing part is arranged on one side of the second partition plate facing the third sedimentation chamber, and a plurality of baffle plates are arranged in the first mixing part;

the second mixing part is communicated with the first mixing part, and a spiral plate is arranged in the second mixing part; and

and the medicine adding part is arranged at the upper end of the first mixing part and is used for adding the medicine into the first mixing part.

6. The sewage treatment apparatus of claim 5, wherein the first mixing section comprises:

a sidewall connected with the second partition;

the first baffle plate is connected with the second partition plate;

the second baffle plate is arranged on one surface of the side wall, which is opposite to the second partition plate; and

the third baffle plate is connected with the second partition plate;

the first baffler, the second baffler and the third baffler set gradually from top to bottom.

7. The sewage treatment apparatus of claim 5, wherein the second mixing section comprises:

a mixing barrel in communication with the first mixing section;

a first spiral plate arranged at the upper part in the mixing cylinder; and

the second spiral plate is arranged at the lower part in the mixing cylinder;

the spiral direction of the first spiral plate is opposite to that of the second spiral plate.

8. The sewage treatment apparatus according to claim 5, wherein the chemical adding portion comprises:

a spray pipe provided with a plurality of spray heads facing the second partition and spaced apart from each other; and

and the liquid pump is connected with the spray pipe.

9. The sewage treatment apparatus according to any one of claims 5 to 8, wherein a liquid inlet tank is provided at a top end of the second partition plate, a bottom surface of the liquid inlet tank has a height smaller than a top surface of the first partition plate, the first to third partition plates are provided in a first direction, a second direction is a direction perpendicular to the first direction and a height direction of the tank body, and a dimension of the liquid inlet tank in the second direction is smaller than a dimension of the first mixing section in the second direction, and/or

The height of the top end of the third partition plate is smaller than the height of the bottom end of the second mixing part.

10. The sewage treatment device according to any one of claims 2 to 8 further comprising a discharge pipe, wherein the first settling chamber, the second settling chamber and the third settling chamber are each provided with the discharge pipe communicating with the outside of the tank.

Images