CN220546621U - Sewage treatment pool - Google Patents

Abstract

The utility model provides a sewage treatment tank, which comprises a first sedimentation tank and a second sedimentation tank which are arranged on a substrate, wherein a first drainage channel is arranged between the first sedimentation tank and the second sedimentation tank, two ends of the first drainage channel are respectively provided with a first water inlet and a first water outlet, the first water inlet is arranged on the inner wall of the first sedimentation tank, the first water outlet is arranged on the inner wall of the second sedimentation tank, at least part of the area of the first drainage channel is in a curved shape, and the highest point of the first water inlet is lower than the lowest point of the first water outlet; the side wall of the second sedimentation tank is provided with a second drainage channel, two ends of the second drainage channel are respectively provided with a second water inlet and a second water outlet, at least part of the area of the second drainage channel is in a bent shape, and the highest point of the second water inlet is lower than the lowest point of the second water outlet. The utility model can automatically clean the residues in the sewage in a precipitation mode, thereby saving labor and improving the cleaning effect of the residues.

Description

Sewage treatment pool

Technical Field

The utility model relates to the technical field of kitchen sewage treatment, in particular to a sewage treatment tank.

Background

Sewage is generated after kitchen cleaning work, and because a large amount of residues are contained in the sewage, sewer blockage and environmental pollution are easily caused, so that a certain treatment work is required before the sewage is discharged, and the residues in the sewage are removed.

The existing kitchen sewage treatment mode is that kitchen workers manually drag out residues in sewage after each meal to be adjusted, the workload is large, the labor is consumed, and the residues are not thoroughly removed.

Disclosure of Invention

The utility model aims to solve the technical problems of labor consumption and poor residue removal effect caused by manual cleaning of residues in sewage at present. The utility model provides a sewage treatment tank which can automatically clean residues in sewage in a precipitation mode, so that manpower is saved, and the cleaning effect of the residues can be improved.

In order to make the technical scheme and advantages of the present utility model more clear, embodiments of the present utility model are described in further detail below.

An embodiment of the present utility model provides a sewage treatment tank including:

a base;

the first sedimentation tank is arranged on the substrate;

the second sedimentation tank is arranged on the substrate and is separated from the first sedimentation tank;

the first water outlet is arranged on the inner wall of the second sedimentation tank, the first water outlet is used for discharging water in the first sedimentation tank to the second sedimentation tank, at least part of the area of the first water outlet is in a curved shape, and the highest point of the first water inlet is lower than the lowest point of the first water outlet along the vertical direction;

and the two ends of the second drainage channel are respectively provided with a second water inlet and a second water outlet, wherein the second water inlet is arranged on the inner wall of the second sedimentation tank, the second water outlet is arranged on the outer wall of the second sedimentation tank, the second drainage channel is used for discharging water in the second sedimentation tank to the outside of the second sedimentation tank, at least part of the area of the second drainage channel is in a bent shape, and the highest point of the second water inlet is lower than the lowest point of the second water outlet along the vertical direction.

According to another embodiment of the present utility model, the first drainage channel and the second drainage channel have the same structure, and each of the first drainage channel and the second drainage channel includes a plurality of drainage channels connected in sequence along a water flow direction: the device comprises a first horizontal section, a first bending section, a vertical section, a second bending section and a second horizontal section, wherein the first horizontal section is connected with the upper end of the vertical section through the first bending section, and the second horizontal section is connected with the lower end of the vertical section through the second bending section.

According to another embodiment of the utility model, the height of the lowest point of the first water inlet is higher than the bottom height of the first sedimentation tank, and the height of the lowest point of the second water inlet is higher than the bottom height of the second sedimentation tank.

According to another embodiment of the utility model, the first sedimentation tank and the second sedimentation tank are arranged at intervals along a first direction, the number of the first drainage channels and the second drainage channels is a plurality, each first drainage channel and each second drainage channel are respectively arranged at intervals along a second direction, and the second direction is perpendicular to the first direction.

According to another embodiment of the present utility model, further comprising:

the third sedimentation tank is arranged on the substrate, the third sedimentation tank and the first sedimentation tank are arranged at intervals along the second direction, a first notch is formed in the bottom of the side wall of the third sedimentation tank, the third sedimentation tank is communicated with the first sedimentation tank through the first notch, a first water outlet is further formed in the bottom of the side wall of the third sedimentation tank, and the first water outlet is opposite to the first notch;

the fourth sedimentation tank is arranged on the substrate, the fourth sedimentation tank and the second sedimentation tank are arranged at intervals along the second direction, a second notch is formed in the bottom of the side wall of the fourth sedimentation tank, the fourth sedimentation tank is communicated with the second sedimentation tank through the second notch, a second water outlet is further formed in the bottom of the side wall of the fourth sedimentation tank, and the second water outlet is opposite to the second notch;

the first notch and the second notch are covered with filter screens, and the filter screens are used for filtering impurities in sewage so as to prevent the impurities in the first sedimentation tank from entering the third sedimentation tank and the impurities in the second sedimentation tank from entering the fourth sedimentation tank; valves are arranged on the first water outlet and the second water outlet and used for controlling the opening and closing of the first water outlet and the second water outlet.

According to another specific embodiment of the utility model, a drainage tank is further arranged on the substrate, the drainage tank is arranged on one side of the third sedimentation tank and one side of the fourth sedimentation tank along the second direction, the drainage tank is respectively communicated with the third sedimentation tank and the fourth sedimentation tank through a first drainage outlet and a second drainage outlet, a total drainage outlet is arranged at the bottom of the side wall of the drainage tank, and the total drainage outlet is used for draining water in the drainage tank to the outside of the sewage treatment tank.

According to another specific embodiment of the utility model, the substrate is further provided with a drainage channel extending along the second direction, the drainage channel is positioned on one side of the second sedimentation tank along the first direction, one end of the drainage channel is communicated with the drainage tank, the second water outlet is arranged on the side wall of the drainage channel, and the drainage channel is communicated with the second sedimentation tank through the second drainage channel.

According to another embodiment of the utility model, the bottom surface of the drain is higher than the bottom surface of the second sedimentation tank.

According to another embodiment of the utility model, the substrate is further provided with a water inlet channel extending along the first direction, the water inlet channel is positioned at one side of the first sedimentation tank and the second sedimentation tank along the second direction, and one end of the water inlet channel is communicated with the first sedimentation tank.

According to another embodiment of the utility model, the bottom surface of the water inlet channel is higher than the bottom surface of the first sedimentation tank.

Compared with the prior art, the utility model has the following beneficial effects:

according to the embodiment of the utility model, the first sedimentation tank and the second sedimentation tank are arranged, so that sewage sequentially passes through the first sedimentation tank and the second sedimentation tank to be subjected to twice sedimentation, and residues in the sewage are precipitated at the bottoms of the first sedimentation tank and the second sedimentation tank, thereby realizing automatic separation of the residues from water, and saving manpower. In addition, through setting at least partial areas of the first drainage channel and the second drainage channel to be curved, and setting the height of the first water outlet to be higher than the first water inlet, setting the height of the second water outlet to be higher than the height of the second water inlet, the method can avoid the residue to be directly discharged from the first drainage channel and the second drainage channel along with sewage, can also slow down the discharge speed of the sewage, prolongs the sedimentation time of the sewage in the first sedimentation tank and the second sedimentation tank, and further improves the cleaning effect of the residue.

Drawings

FIG. 1 is a perspective view showing a sewage treatment tank according to an embodiment of the present utility model;

FIG. 2 is a perspective view of a sewage treatment tank according to an embodiment of the present utility model;

FIG. 3 shows a top view of a wastewater treatment tank provided by an embodiment of the present utility model;

FIG. 4 shows a cross-sectional view taken along A-A of FIG. 3;

FIG. 5 shows a B-B cross-sectional view of FIG. 3;

fig. 6 shows a partial enlarged view of the portion C in fig. 5.

Reference numerals:

1. the water inlet device comprises a base body, 2, a first sedimentation tank, 3, a second sedimentation tank, 4, a first water discharge channel, 41, a first water inlet, 42, a first water outlet, 5, a second water discharge channel, 51, a second water inlet, 52, a second water outlet, 61, a first horizontal section, 62, a first bending section, 63, a vertical section, 64, a second bending section, 65, a second horizontal section, 7, a third sedimentation tank, 71, a first notch, 72, a first water discharge port, 73, a filter screen, 74, a valve, 8, a fourth sedimentation tank, 81, a second notch, 82, a second water discharge port, 9, a water discharge tank, 91, a total water discharge port, 10, a water discharge channel and 11.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The terms "first," "second," "third," "fourth," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "left", "right", "front", "rear", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

In order to make the technical scheme and advantages of the present utility model more clear, embodiments of the present utility model are described in further detail below.

Referring to fig. 1, 2 and 5, an embodiment of the present utility model provides a sewage treatment tank including a first sedimentation tank 2 and a second sedimentation tank 3 separately provided on a base 1. A first drainage channel 4 is arranged between the first sedimentation tank 2 and the second sedimentation tank 3, the first sedimentation tank 2 and the second sedimentation tank 3 are communicated through the first drainage channel 4, and the first drainage channel 4 is used for discharging water in the first sedimentation tank 2 to the second sedimentation tank 3. The side wall of the second sedimentation tank 3 is provided with a second drainage channel 5, and the second drainage channel 5 is used for draining the water in the second sedimentation tank 3 to the outside of the second sedimentation tank 3.

When the sewage needs to be cleaned, the sewage is discharged into the first sedimentation tank 2, so that residues in the sewage are sedimentated in the first sedimentation tank 2; then, the sewage after being precipitated by the first sedimentation tank 2 enters the second sedimentation tank 3 through the first drainage channel 4, and is precipitated in the second sedimentation tank 3; finally, the sewage precipitated by the second sedimentation tank 3 is discharged to the outside of the second sedimentation tank 3 through the second drainage channel 5, and the sewage discharged from the second drainage channel 5 does not contain residues. According to the embodiment of the utility model, the first sedimentation tank 2 and the second sedimentation tank 3 are arranged, so that sewage sequentially passes through the first sedimentation tank 2 and the second sedimentation tank 3 to be subjected to twice sedimentation, and residues in the sewage are precipitated at the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3, thereby realizing automatic separation of the residues from water, and saving manpower.

Referring to fig. 5, both ends of the first drainage channel 4 are respectively provided with a first water inlet 41 and a first water outlet 42, wherein the first water inlet 41 is arranged on the inner wall of the first sedimentation tank 2, and the first water outlet 42 is arranged on the inner wall of the second sedimentation tank 3. The second water drainage channel 5 is provided with a second water inlet 51 and a second water outlet 52 at both ends thereof. The second water inlet 51 is arranged on the inner wall of the second sedimentation tank 3, and the second water outlet 52 is arranged on the outer wall of the second sedimentation tank 3. At least partial areas of the first and second drainage passages 4 and 5 are curved, and the highest point of the first water inlet 41 is lower than the lowest point of the first water outlet 42 in the vertical direction, and the height difference is shown as a dimension L1 in fig. 5; the highest point of the second water inlet 51 is lower than the lowest point of the second water outlet 52, and the height difference thereof is shown as a dimension L2 in fig. 5.

In the embodiment of the utility model, at least partial areas of the first drainage channel 4 and the second drainage channel 5 are bent, so that the flow resistance of sewage in the first drainage channel 4 and the second drainage channel 5 can be increased, and the flow speed of the sewage can be slowed down. By setting the height of the first water outlet 42 to be higher than the first water inlet 41 and setting the height of the second water outlet 52 to be higher than the second water inlet 51, it is possible to prevent residues deposited on the bottom of the sedimentation tank from being discharged from the first water outlet 42 and the second water outlet 52 with sewage; meanwhile, sewage flows from the first water inlet 41 and the second water inlet 51 with lower heights to the first water outlet 42 and the second water outlet 52 with higher heights, and kinetic energy can be converted into gravitational potential energy, so that the discharge speed of the sewage is slowed down, the sedimentation time of the sewage in the first sedimentation tank 2 and the second sedimentation tank 3 is prolonged, and the residue removal effect is improved. In addition, by slowing down the discharge speed of the sewage in the first sedimentation tank 2 and the second sedimentation tank 3, operators can also have enough time to salvage the greasy dirt floating above the sewage, and the discharged sewage can meet the requirement of urban environmental protection.

Referring to fig. 6, further, the first drainage channel 4 and the second drainage channel 5 have the same structure, and each includes a structure of sequentially connecting in a water flow direction (as shown by an arrow direction in fig. 6): the first horizontal section 61, the first bending section 62, the vertical section 63, the second bending section 64 and the second horizontal section 65, wherein the first horizontal section 61 is connected with the upper end of the vertical section 63 through the first bending section 62, the second horizontal section 65 is connected with the lower end of the vertical section 63 through the second bending section 64, the first water inlet 41 and the second water inlet 51 are arranged on the first horizontal section 61, and the first water outlet 42 and the second water outlet 52 are arranged on the second horizontal section 65. When sewage passes through the first drainage channel 4 and the second drainage channel 5, the sewage must flow from bottom to top in the vertical section 63, and the flow speed of the sewage in the vertical section 63 is slowed down because the flow direction of the sewage is opposite to the direction of the gravity applied to the sewage, so that the residence time of the sewage in the first sedimentation tank 2 and the second sedimentation tank 3 is prolonged. The inventors have found that, compared with other structures, the structure in which the first drainage channel 4 and the second drainage channel 5 are arranged in a way that the horizontal section is connected with the vertical section can reduce the flow speed of sewage to the greatest extent, so that the sedimentation effect is better. In addition, by providing the vertical section 63 and setting the positions of the first water outlet 42 and the second water outlet 52 above the vertical section 63, the positions of the first water outlet 42 and the second water outlet 52 are higher, and residues deposited at the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3 can be prevented from being discharged from the first water outlet 42 and the second water outlet 52, which contributes to improving the cleaning effect of the residues.

Further, the lowest point of the first water inlet 41 has a height higher than the bottom height of the first sedimentation tank 2, and the height difference is shown as a dimension L3 in fig. 5; the lowest point of the second water inlet 51 has a height higher than the bottom height of the second sedimentation tank 3, the difference in height of which is shown as dimension L4 in fig. 5. By setting the heights of the first water inlet 41 and the second water inlet 51 to be higher than the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3, residues deposited at the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3 can be prevented from entering the first water inlet 41 and the second water inlet 51.

Further, referring to fig. 1 to 3, the first sedimentation tank 2 and the second sedimentation tank 3 are arranged at intervals along a first direction (X direction as shown in fig. 1 and 2), the number of the first drainage channels 4 and the second drainage channels 5 is plural, and each of the first drainage channels 4 and each of the second drainage channels 5 are arranged at intervals along a second direction (Y direction as shown in fig. 1 and 2) which is perpendicular to the first direction.

Further, referring to fig. 3 and 4, the present embodiment provides a sewage treatment tank further including a third sedimentation tank 7 and a fourth sedimentation tank 8 disposed on the substrate 1, the third sedimentation tank 7 and the first sedimentation tank 2 being disposed at intervals along the second direction, and the fourth sedimentation tank 8 and the second sedimentation tank 3 being disposed at intervals along the second direction. The lateral wall bottom of third sedimentation tank 7 is equipped with first breach 71, and third sedimentation tank 7 is linked together through first breach 71 with first sedimentation tank 2, and the lateral wall bottom of third sedimentation tank 7 still is equipped with first outlet 72, and first outlet 72 sets up with first breach 71 relatively. The bottom of the side wall of the fourth sedimentation tank 8 is provided with a second notch 81, the fourth sedimentation tank 8 is communicated with the second sedimentation tank 3 through the second notch 81, the bottom of the side wall of the fourth sedimentation tank 8 is also provided with a second water outlet 82, and the second water outlet 82 is arranged opposite to the second notch 81. The first notch 71 and the second notch 81 are covered with a filter screen 73, the filter screen 73 is used for filtering impurities in sewage so as to prevent the impurities in the first sedimentation tank 2 from entering the third sedimentation tank 7 and the impurities in the second sedimentation tank 3 from entering the fourth sedimentation tank 8; the first drain port 72 and the second drain port 82 are provided with a valve 74, and the valve 74 is used for controlling the opening and closing of the first drain port 72 and the second drain port 82.

When the first sedimentation tank 2 and the second sedimentation tank 3 are in normal operation (i.e. sewage is discharged into the first sedimentation tank 2, and the first sedimentation tank 2 and the second sedimentation tank 3 are used for sedimentation of residues in the sewage), the valve 74 on the first water outlet 72 and the second water outlet 82 is closed, at this time, the sewage in the first sedimentation tank 2 can enter the third sedimentation tank 7 through the first notch 71, and the sewage in the second sedimentation tank 3 can enter the fourth sedimentation tank 8 through the second notch 81. Meanwhile, the filter screen 73 intercepts residues outside the third sedimentation tank 7 and the fourth sedimentation tank 8, so that the sewage entering the third sedimentation tank 7 and the fourth sedimentation tank 8 does not contain residues. When more residues are deposited at the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3, the first sedimentation tank 2 and the second sedimentation tank 3 need to be cleaned, and the residues at the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3 are fished out; at this time, the valves 74 on the first drain port 72 and the second drain port 82 are opened, and the contaminated water flows out from the first drain port 72 and the second drain port 82. Because the first water outlet 72 and the second water outlet 82 are respectively arranged at the bottoms of the side walls of the third sedimentation tank 7 and the fourth sedimentation tank 8, sewage in the first sedimentation tank 2 and the third sedimentation tank 7 can be drained through the first water outlet 72, sewage in the second sedimentation tank 3 and the fourth sedimentation tank 8 can be drained through the second water outlet 82, in the process, residues cannot be drained from the first water outlet 72 and the second water outlet 82 under the interception of the filter screen 73, so that residues can be left at the bottoms of the first sedimentation tank 2 and the second sedimentation tank 3, and after the sewage is completely drained, the residues can be completely exposed, so that operators can conveniently drag out the residues.

Further, referring to fig. 1 to 4, a drainage tank 9 is further provided on the base 1, the drainage tank 9 is provided on one side of the third sedimentation tank 7 and the fourth sedimentation tank 8 along the second direction, the drainage tank 9 is respectively communicated with the third sedimentation tank 7 and the fourth sedimentation tank 8 through a first drainage outlet 72 and a second drainage outlet 82, a total drainage outlet 91 is provided at the bottom of the side wall of the drainage tank 9, and the total drainage outlet 91 is used for draining water in the drainage tank 9 to the outside of the sewage treatment tank. Illustratively, the bottom surfaces of the third sedimentation tank 7 and the fourth sedimentation tank 8 are flush, and the bottom surface of the drainage tank 9 may be lower than the bottom surfaces of the third sedimentation tank 7 and the fourth sedimentation tank 8, or may be flush with the bottom surfaces of the third sedimentation tank 7 and the fourth sedimentation tank 8. When the valves 74 on the first and second drain openings 72 and 82 are opened, the sewage is discharged into the drain tank 9 through the first and second drain openings 72 and 82, and finally flows into the sewer pipe through the main drain opening 91. By setting the bottom surface of the drain tank 9 lower than the bottom surfaces of the third and fourth settling tanks 7 and 8, the sewage in the drain tank 9 can be prevented from flowing back into the third and fourth settling tanks 7 and 8 through the first and second drain ports 72 and 82.

Further, referring to fig. 1 to 3, the base 1 is further provided with a drainage canal 10 extending along the second direction, the drainage canal 10 is located at one side of the second sedimentation tank 3 along the first direction, one end of the drainage canal 10 is communicated with the drainage tank 9, the second water outlet 52 is arranged on the side wall of the drainage canal 10, and the drainage canal 10 is communicated with the second sedimentation tank 3 through the second drainage channel 5. By providing the drainage channel 10, the sewage discharged from each second drainage channel 5 can be drained into the drainage pool 9 in a concentrated manner.

Further, referring to fig. 1 to 3, the base 1 is further provided with a water inlet channel 11 extending along the first direction, the water inlet channel 11 is located at one side of the first sedimentation tank 2 and the second sedimentation tank 3 along the second direction, one end of the water inlet channel 11 is communicated with the first sedimentation tank 2, and the other end is communicated with a drainage pipeline below the kitchen drainage tank. Through setting up inlet canal 11, can be with pouring the direct drainage of the sewage of kitchen water drainage inslot to in the first sedimentation tank 2, need not the manual work and carry sewage.

Optionally, the bottom surface of the drainage channel 10 is higher than the bottom surface of the second sedimentation tank 3, and the bottom surface of the water inlet channel 11 is higher than the bottom surface of the first sedimentation tank 2. Because the drainage canal 10 and the water inlet canal 11 are used for drainage, the drainage canal 10 and the water inlet canal 11 do not need to have sedimentation, the depth of the drainage canal 10 is smaller than that of the second sedimentation tank 3, the depth of the water inlet canal 11 is smaller than that of the first sedimentation tank 2, the flowing speed of sewage can be accelerated, and the drainage efficiency is improved.

Optionally, the upper surface of base member 1 is equipped with the steel sheet to cover the opening of first sedimentation tank 2, second sedimentation tank 3, third sedimentation tank 7, fourth sedimentation tank 8, drainage tank 9, drainage canal 10 and inlet canal 11 top, thereby prevent that the peculiar smell from dispelling out, also can be convenient for the staff of kitchen walk on the steel sheet, increase the space utilization in kitchen.

The sewage treatment pond that this application provided is built with low costs, but cyclic utilization, can improve the daily work efficiency in kitchen, does not influence the aesthetic property of surrounding environment again, and the later maintenance in sewage treatment pond is simple easy to operate, and sewage treatment effect is obvious. In application, the size, the number and the placement positions of the sewage treatment tanks can be adjusted according to actual conditions, and the sewage treatment tank is flexible and convenient to use.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. A wastewater treatment tank, comprising:

a base;

the first sedimentation tank is arranged on the substrate;

the second sedimentation tank is arranged on the substrate and is separated from the first sedimentation tank;

the first water draining channel is arranged between the first sedimentation tank and the second sedimentation tank, the first sedimentation tank and the second sedimentation tank are communicated through the first water draining channel, a first water inlet and a first water outlet are respectively formed in two ends of the first water draining channel, the first water inlet is formed in the inner wall of the first sedimentation tank, the first water outlet is formed in the inner wall of the second sedimentation tank, the first water draining channel is used for draining water in the first sedimentation tank to the second sedimentation tank, at least part of the area of the first water draining channel is in a bent shape, and the highest point of the first water inlet is lower than the lowest point of the first water outlet along the vertical direction;

the second water drainage channel, its both ends are equipped with second water inlet and second delivery port respectively, wherein, the second water inlet is located on the inner wall of second sedimentation tank, the second delivery port is located on the outer wall of second sedimentation tank, the second water drainage channel is used for with the water in the second sedimentation tank is discharged to the second sedimentation tank is outside, at least partial region of second water drainage channel is crooked form, and along vertical direction, the highest point of second water inlet is less than the lowest point of second delivery port.

2. The wastewater treatment tank of claim 1, wherein the first and second water discharge channels are identical in structure and each comprise a plurality of water discharge channels connected in sequence along a water flow direction: the device comprises a first horizontal section, a first bending section, a vertical section, a second bending section and a second horizontal section, wherein the first horizontal section is connected with the upper end of the vertical section through the first bending section, and the second horizontal section is connected with the lower end of the vertical section through the second bending section.

3. The wastewater treatment tank of claim 1, wherein a lowest point of the first water inlet is higher than a bottom height of the first sedimentation tank, and a lowest point of the second water inlet is higher than a bottom height of the second sedimentation tank.

4. The wastewater treatment tank of claim 1, wherein the first sedimentation tank and the second sedimentation tank are arranged at intervals along a first direction, the number of the first drainage channels and the second drainage channels is plural, each of the first drainage channels and each of the second drainage channels are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction.

5. The wastewater treatment tank of claim 4, further comprising:

the third sedimentation tank is arranged on the substrate, the third sedimentation tank and the first sedimentation tank are arranged at intervals along the second direction, a first notch is formed in the bottom of the side wall of the third sedimentation tank, the third sedimentation tank is communicated with the first sedimentation tank through the first notch, a first water outlet is further formed in the bottom of the side wall of the third sedimentation tank, and the first water outlet and the first notch are arranged oppositely;

the fourth sedimentation tank is arranged on the substrate, the fourth sedimentation tank and the second sedimentation tank are arranged at intervals along the second direction, a second notch is formed in the bottom of the side wall of the fourth sedimentation tank, the fourth sedimentation tank is communicated with the second sedimentation tank through the second notch, a second water outlet is further formed in the bottom of the side wall of the fourth sedimentation tank, and the second water outlet and the second notch are arranged oppositely;

the first notch and the second notch are covered with filter screens, and the filter screens are used for filtering impurities in sewage so as to prevent the impurities in the first sedimentation tank from entering the third sedimentation tank and prevent the impurities in the second sedimentation tank from entering the fourth sedimentation tank; valves are arranged on the first water outlet and the second water outlet, and the valves are used for controlling the opening and closing of the first water outlet and the second water outlet.

6. The wastewater treatment tank as claimed in claim 5, wherein the substrate is further provided with a drainage tank, the drainage tank is arranged on one side of the third sedimentation tank and one side of the fourth sedimentation tank along the second direction, the drainage tank is respectively communicated with the third sedimentation tank and the fourth sedimentation tank through the first drainage port and the second drainage port, and a total drainage port is arranged at the bottom of the side wall of the drainage tank and is used for draining water in the drainage tank to the outside of the wastewater treatment tank.

7. The wastewater treatment tank of claim 6, wherein the substrate is further provided with a drainage channel extending along the second direction, the drainage channel is located at one side of the second sedimentation tank along the first direction, one end of the drainage channel is communicated with the drainage tank, the second water outlet is formed in the side wall of the drainage channel, and the drainage channel is communicated with the second sedimentation tank through the second drainage channel.

8. The wastewater treatment tank of claim 7, wherein a floor height of the drain is higher than a floor height of the second sedimentation tank.

9. The wastewater treatment tank of any one of claims 4 to 8, wherein the substrate is further provided with a water inlet channel extending along the first direction, the water inlet channel is located at one side of the first sedimentation tank and the second sedimentation tank along the second direction, and one end of the water inlet channel is communicated with the first sedimentation tank.

10. The wastewater treatment tank of claim 9, wherein a floor height of the water inlet channel is higher than a floor height of the first sedimentation tank.