CN106865756B

CN106865756B - Sewage treatment device

Info

Publication number: CN106865756B
Application number: CN201710249799.1A
Authority: CN
Inventors: 陈建军; 高风光
Original assignee: Suzhou Qingran Environmental Protection Technology Co ltd
Current assignee: Suzhou Qingran Environmental Protection Technology Co ltd
Priority date: 2017-04-17
Filing date: 2017-04-17
Publication date: 2023-05-26
Anticipated expiration: 2037-04-17
Also published as: CN106865756A

Abstract

The invention discloses a sewage treatment device, which comprises a tank body, wherein a water inlet for sewage to enter and a water outlet for treated water to drain are arranged on the tank body, a first lifting cylinder assembly, an aeration assembly, a separator assembly and a sewage guide mechanism are also arranged in the tank body, wherein the first lifting cylinder assembly is provided with a first lifting cylinder and a second lifting cylinder, the second lifting cylinder can effectively enhance the circulating flow of sewage in the tank body, so that the aeration of the sewage in the tank body is more sufficient and more uniform, and the first lifting cylinder can realize the conveying of the sewage to the separator assembly through the sewage guide mechanism while further enhancing the biochemical reaction in the sewage; based on the structure of the invention, the actual residence time of sewage in the device can be increased, the biochemical effect of the system is effectively ensured, and the treated water obtained after separation by the separator component has higher quality.

Description

Sewage treatment device

Technical Field

The invention relates to the field of environmental protection in an industrial production process, in particular to a sewage treatment device.

Background

The activated sludge process is an important sewage treatment method, and for organic wastewater with better biochemical performance, the activated sludge process is widely applied due to the advantages of good treatment effect, low running cost, simple equipment and the like, but the traditional activated sludge device has some disadvantages which cannot be ignored:

1. the residence time is prolonged to achieve the purpose of enhancing the biochemical treatment effect, the occupied area of the device is large, and the land resource waste is caused;

2. the concentration of the activated sludge in the device is low, so that the high treatment load cannot be achieved, and the high-concentration organic wastewater cannot be treated;

3. the sewage concentration is suddenly increased or toxic substances enter the activated sludge device, so that serious impact is caused on an activated sludge system, the treatment effect of the system is greatly reduced, and even paralysis of the activated sludge system is caused;

4. the device has poor biochemical effect due to low oxygenation efficiency, and if the biochemical treatment effect is enhanced, the oxygenation amount is increased, so that the operation energy consumption is obviously increased.

In view of the above, there is a need to provide a sewage treatment apparatus that is rational in structure to overcome the above problems.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and provides a sewage treatment device which is specifically designed as follows.

The sewage treatment device comprises a tank body, wherein a water inlet for sewage to enter and a water outlet for treated water to drain are formed in the tank body, and a first lifting cylinder assembly, an aeration assembly, a separator assembly and a sewage guide mechanism are further arranged in the tank body; wherein,,

the first lifting cylinder assembly comprises a first housing, a plurality of first lifting cylinders and a plurality of second lifting cylinders, wherein the first lifting cylinders and the second lifting cylinders are arranged in the first housing; the aeration assembly is provided with a first aeration pipeline extending into the lower end of the first lifting cylinder and the lower end of the second lifting cylinder; the separator assembly is provided with a separation plate which is arranged opposite to the side wall of the tank body, and a sedimentation area for standing and separating sewage is formed between the separation plate and the side wall of the tank body; the sewage diversion mechanism comprises a containing cavity, a backflow channel and a first lifting cylinder, wherein the containing cavity is formed in the top of the first housing and used for storing sewage, the backflow channel is communicated with the containing cavity and the sedimentation zone, a top outlet of the first lifting cylinder is communicated with the containing cavity, a top outlet of the second lifting cylinder is communicated with the inside of the tank body, an external circulation backflow port is formed in the bottom of the sedimentation zone and communicated with the inside of the tank body, and the water outlet is communicated with the sedimentation zone.

Further, the tank body is internally provided with a plurality of second lifting cylinder assemblies, each second lifting cylinder assembly comprises a second housing and a plurality of third lifting cylinders arranged in the second housing, each aeration assembly is provided with a second aeration pipeline extending into the lower end of each third lifting cylinder, and the top outlet of each third lifting cylinder is communicated with the inside of the tank body.

Further, the second lifting cylinder assemblies are vertically arranged in the tank body and are uniformly distributed into a regular shape, and the first lifting cylinder assemblies are vertically arranged at the central positions among the second lifting cylinder assemblies.

Further, the first housing comprises a first housing side wall, a first top cover and a first bottom plate, wherein the first top cover and the first bottom plate are arranged at the upper end and the lower end of the first housing side wall, and two ends of the plurality of first lifting cylinders and the second lifting cylinders are respectively abutted to the first top cover and the first bottom plate; the first inner cover is further arranged inside the side wall of the first housing, the second lifting cylinders are uniformly clamped between the side wall of the first housing and the first inner cover, and the first lifting cylinders are uniformly distributed inside the first inner cover to form a regular shape.

Further, the upper side of the first top cover protrudes upwards to form a continuous cofferdam, and the accommodating cavity is formed by surrounding the first top cover and the cofferdam.

Further, the aeration assembly also has an auxiliary aeration line disposed at a bottom location within the second housing for aerating the wastewater within the second housing at the periphery of the third lift cylinder.

Further, the outlet end of the reflux channel is abutted to the upper end of the separation plate, and a plurality of through holes for discharging sewage into the sedimentation area are formed in the position where the separation plate is abutted to the outlet end of the reflux channel; the lower end of the separation plate is provided with an inclined plate section which gradually closes to the side wall of the tank body from top to bottom.

Further, the second housing comprises a second housing side wall, and a second top cover and a second bottom plate which are arranged at the upper end and the lower end of the second housing side wall, two ends of the third lifting cylinders are respectively abutted to the second top cover and the second bottom plate, a plurality of third lifting cylinders are arranged at a plurality of positions and the center positions of the inner periphery of the second housing side wall, and the third lifting cylinders arranged at a plurality of positions of the inner periphery of the second housing side wall are uniformly distributed into a regular shape.

The first bottom plate or the first housing side wall is close to the first bottom plate, the bottom of the first lifting cylinder or the side wall close to the bottom of the first lifting cylinder, the bottom of the second lifting cylinder or the side wall close to the bottom of the second lifting cylinder, the second bottom plate or the side wall close to the second bottom plate, the bottom of the third lifting cylinder or the side wall close to the bottom of the third lifting cylinder are all provided with through holes for sewage to circulate in the first lifting cylinder component, the second lifting cylinder component and the tank body respectively and mutually.

The beneficial effects of the invention are as follows: the first lifting cylinder assembly is provided with the first lifting cylinder and the second lifting cylinder, wherein the second lifting cylinder can effectively enhance the circulating flow of sewage in the tank body, so that the aeration of the sewage in the tank body is more sufficient and the mixing is more uniform; the first lifting cylinder can further strengthen the biochemical reaction in the sewage and simultaneously realize the conveying of the sewage to the separator assembly through the sewage guide mechanism; based on the structure of the invention, the actual residence time of sewage in the device is actually increased, so that the biochemical effect of the system is effectively ensured, and the treated water obtained after separation by the separator component has higher quality; in addition, the design structure of the invention changes phase to reduce the occupied area of the device system.

Drawings

FIG. 1 is a schematic plan view of a sewage treatment apparatus;

FIG. 2 is a schematic cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a schematic cross-sectional view in the direction B-B of FIG. 1;

FIG. 4 is a top view of one embodiment of a first lift cylinder assembly;

FIG. 5 is a schematic view of the internal mounting and securing of the first lift cylinder assembly of FIG. 4;

FIG. 6 is a schematic view of the distribution of aeration lines within the first lift cylinder assembly of FIG. 4;

FIG. 7 is a schematic cross-sectional view in the M-M direction of FIG. 6;

FIG. 8 is a schematic view of the top of the first lift cylinder assembly with the receiving chamber mated with the return channel;

FIG. 9 is a top view of one embodiment of a second lift cylinder assembly;

FIG. 10 is a schematic view of the internal mounting and securement of the second lift cylinder assembly of FIG. 9;

FIG. 11 is a schematic view of the distribution of aeration lines within the second lift cylinder assembly of FIG. 9;

fig. 12 is a schematic cross-sectional view of the G-G direction of fig. 10.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 12, which are preferred embodiments of the present invention.

Referring to fig. 1, 2 and 3, the sewage treatment apparatus according to the present invention includes a tank 1, a water inlet 11 for sewage to enter and a water outlet 12 for treated water to drain are provided on the tank 1, in this embodiment, the water inlet 11 is provided on a side wall of the tank 1 and is located at a position below an airflow baffle 515, and the water outlet 12 is provided on a side wall of the tank 1 and is located in a sedimentation zone 50. In the embodiment, only one water inlet 11 and one water outlet 12 are arranged on the tank body 1; in other embodiments, the tank 1 may also be provided with a plurality of water inlets 11 and a plurality of water outlets 12, and the specific number and positions of the water inlets may be adjusted according to the requirements.

In this embodiment, the tank 1 is further provided with a first lifting cylinder assembly 2, a second lifting cylinder assembly 3, an aeration assembly, a separator assembly and a sewage guiding mechanism. In other embodiments, the sewage treatment apparatus may not include the second lift cylinder assembly 3. In order to facilitate understanding of the present invention, the following detailed description is made with respect to specific structures and cooperation between the structures in this embodiment.

In this embodiment, the tank body is internally provided with a first lifting cylinder assembly 2 and a plurality of second lifting cylinder assemblies 3, the tank body 1 is in a cylindrical structure, the plurality of second lifting cylinder assemblies 3 are vertically arranged in the tank body 1 and are uniformly distributed into a regular shape, and the first lifting cylinder assembly 2 is vertically arranged at the central position among the plurality of second lifting cylinder assemblies 3. In this embodiment, the regular shape formed by the arrangement is annular, that is, the plurality of second lifting cylinder assemblies 3 are vertically arranged in the tank body 1 and are uniformly distributed in an annular shape, more specifically, the number of the second lifting cylinder assemblies 3 in the present invention is six. Of course, in other embodiments, the tank 1 may have other shapes such as a cube, the number of the second lifting cylinder assemblies 3 may have other values, and the regular shape may have a regular polygon, an ellipse, or the like.

As shown in fig. 4, 5, 6 and 7, the first lift cylinder assembly 2 of the present invention includes a first housing, and a plurality of first lift cylinders 21 and a plurality of second lift cylinders 22 disposed inside the first housing; the aeration assembly has a first aeration line 41 extending into the lower ends of the first and

second lift cylinders

21, 22.

Specifically, the first housing in this embodiment includes a first housing sidewall 200, and a first top cover 201 and a first bottom plate 202 disposed at upper and lower ends of the first housing sidewall 200, and two ends of a plurality of first lifting cylinders 21 and second lifting cylinders 22 are respectively abutted to the first top cover 201 and the first bottom plate 202; the first inner cover 203 is disposed inside the first cover sidewall 200, and the plurality of second lifting cylinders 22 are uniformly sandwiched between the first cover sidewall 200 and the first inner cover 203, and the plurality of first lifting cylinders 21 are uniformly arranged inside the first inner cover 203 to form a regular shape. In this embodiment, the plurality of first lifting cylinders 21 are uniformly distributed in a ring shape, that is, the regular shape is a ring shape, and in other embodiments, the regular shape may be a regular polygon, an ellipse, or other shapes. In the embodiment, the number of the first lifting cylinders 21 and the second lifting cylinders 22 is 6, and in other embodiments, the number of the first lifting cylinders 21 and the second lifting cylinders 22 can be adjusted according to actual requirements. The first inner cover 203 may be provided as a continuously molded one-piece structure in the present invention; the first inner cover 203 may be configured as a multi-stage structure with a plurality of inner cover units arranged at intervals from top to bottom.

As shown in fig. 2, 4, 6 and 7, the first aeration pipe 41 is in communication with the aeration wind input main trunk 40 through the first flange 410, and in other embodiments, the first aeration pipe 41 may also be in communication with the aeration wind input main trunk 40 through welding or bonding. The aeration wind input main trunk 40 has an aeration wind inlet 400 connected to the outside of the tank 1. The first aeration pipe 41 extends downward through the first top cover 201 of the first housing to a position inside the first housing near the first bottom plate 202, and the first aeration pipe 41 is formed with a first aeration pipe branch 411 and a second aeration pipe branch 412 in a ring shape at a position inside the first housing near the first bottom plate 202. In the present embodiment, the annular first aeration pipe branch 411 and the second aeration pipe branch 412 are concentrically arranged and respectively have a first bleed pipe 4111 and a second bleed pipe 4121 extending into the first lift cylinder 21 and the second lift cylinder 22. The ends of the first air entraining pipe 4111 and the second air entraining pipe 4121 are respectively connected with a first aeration head 4110 and a second aeration head 4120 which directly aerate the lower ends of the inner parts of the first lifting cylinder 21 and the second lifting cylinder 22. The gas entering the first aeration pipe 41 from the aeration wind inlet main line 40 enters the first lifting cylinder 21 and the second lifting cylinder 22 through the first aeration head 4110 and the second aeration head 4120 respectively.

In the present invention, the first lift cylinder assembly 2 has a first fixing unit inside for fixing the first lift cylinder 21 and the second lift cylinder 22. Referring to fig. 7, three sets of first fixing units are provided for fixing the first and

second lift cylinders

21, 22 in the present embodiment at upper, middle and lower positions, respectively, inside the first housing. As shown in connection with fig. 5, each set of first fixing units comprises a number of first cross braces 23, a number of first clamping plates 24, two first annular covers 25. The first lifting cylinders 21 which are uniformly arranged in an annular shape are clamped between the two annular covers 25, a plurality of first cross braces 23 are connected between the first inner cover 203 and the annular cover 25 which is arranged on the periphery, and clamping plates 24 are further arranged on the side parts of each first lifting cylinder 21 and each second lifting cylinder 22 to clamp and fix the first lifting cylinders. In other embodiments of the present invention, the first fixing unit is not limited to the structure disclosed in the present embodiment, and the basic principle of the design is that: the sewage circulation inside the first lifting cylinder component 2 is not affected, and the stability of the internal structure of the first lifting cylinder component 2 can be ensured.

Referring to fig. 2, 5 and 7, the first lift cylinder assembly 2 in this embodiment is further provided with a plurality of first column supports 26 located at the bottom of the first bottom plate 202, and the first lift cylinder assembly 2 is fixed to the inside of the tank 1 by the first column supports 26.

Referring to fig. 1, 2 and 3, the separator assembly of the present invention has a separator plate 51 disposed opposite the sidewall 10 of the tank 1. In the embodiment, the tank body 1 is in a cylindrical structure, the separating plate 51 is positioned on the inner side of the side wall 10 of the tank body 1 and is provided with a continuous annular structure, and a sedimentation area 50 for standing and separating sewage is formed between the separating plate 51 and the side wall of the tank body 1; of course, in other embodiments, the separator plate 51 may be a discontinuous annular structure.

The sewage diversion mechanism in the invention comprises a containing chamber 60 arranged at the top of the first housing for storing sewage and a backflow channel 61 which is communicated with the containing chamber 60 and the sedimentation zone 50. As shown in fig. 3, 4, 7 and 8, the accommodating chamber 60 is formed by enclosing the first top cover 201 and the cofferdam 62 provided on the upper side of the first top cover 201, wherein the cofferdam 62 is formed by protruding upward from the upper side of the first top cover 201. In the present embodiment, the cofferdam 62 has a cylindrical wall structure provided in the upper middle area of the first top cover 201. The top outlet 210 of the first lift cylinder 21 communicates with the receiving chamber 60 and the outlet end of the return channel 61 communicates with the settling zone 50. In the present embodiment, the cofferdam 62 is formed by extending the first inner cover 203 to the outside of the first cover at one end of the first top cover 201; of course, the cofferdam 62 can also be formed separately on the upper side of the first header 201.

Based on the above implementation, the water outlet 12 for discharging treated water in the present invention communicates with the settling zone 50. Specifically, the water outlet 12 is arranged on the upper side of the sedimentation zone 50, and the bottom of the sedimentation zone 50 is provided with an external circulation reflux port 500 communicated with the inside of the tank body 1; wherein, the lower sludge after the sedimentation treatment in the sedimentation zone 50 flows back to the tank body 1 through the external circulation return port 500, and the upper treatment water is discharged to the outside of the tank body 1 through the water outlet 12. In addition, the top outlet 220 of the second lift cylinder 22 in this embodiment is at the periphery of the weir 62, which communicates with the interior of the tank 1.

Referring to fig. 2 and 3, the lower end of the separating plate 51 in this embodiment has an inclined plate section 512 gradually approaching the sidewall of the tank 1 from top to bottom, and an outer circulation return port 500 is formed between the lower edge of the inclined plate section 512 and the sidewall 10 of the tank 1, and the outer circulation return port 500 is disposed along the sidewall of the tank 1. The upper edge of the sloping plate section 512 is also connected to a riser section 511, which riser section 511 and sloping plate section 512 together constitute the separator plate 51 in this embodiment.

The inclined plate section 512 of the separating plate 51 in this embodiment is beneficial to the sludge to be deposited and fall back into the tank 1, however, the separating plate 51 in the present invention may have other design structures to realize the basic principles of sewage collection and deposition separation.

In this embodiment, a plurality of separator support frames for connecting and fixing the separator plate 51 and the sidewall 10 of the tank 1 are disposed between each other, and referring to fig. 2, each separator support frame includes a plurality of support frames 513 disposed between the separator plate 51 and the sidewall 10 of the tank 1. As shown in connection with fig. 1, the separator support frame group consisting of several support frames 513 is arranged in a ring shape in the direction of the arrangement of the separator assembly, in this embodiment there are 24 separator support frame groups for connection fixation between the separator plate and the side wall 10 of the tank 1. Of course, in other embodiments, the specific structure and composition of the support frame set may be adjusted according to actual requirements.

Referring to fig. 2 and 3, a ring-shaped sedimentation reflux plate 514 is disposed in the side wall 10 of the tank 1 directly below the external circulation reflux port 500, the sedimentation reflux plate 514 extends downward from the side wall 10 toward the inside of the tank 1, a ring-shaped airflow baffle 515 is disposed below the sedimentation reflux plate 514, and the airflow baffle 515 extends upward from the side wall 10 toward the inside of the tank 1 and is combined with the sedimentation reflux plate 514.

Referring to fig. 9, 10, 11 and 12, there is shown an embodiment of the second lift cylinder of the present invention.

In this embodiment, the second lifting cylinder assembly 3 includes a second housing and a plurality of third lifting cylinders 31 disposed inside the second housing, specifically, the second housing includes a second housing sidewall 300, and a second top cover 301 and a second bottom plate 302 disposed at upper and lower ends of the second housing sidewall 300, two ends of the third lifting cylinders 31 are respectively abutted to the second top cover 301 and the second bottom plate 302, and the plurality of third lifting cylinders 31 are disposed at a plurality of positions and a central position on an inner periphery of the second housing sidewall 300. Wherein the third elevation cylinders 31 disposed at a plurality of positions on the inner periphery of the second housing sidewall 300 are uniformly arranged in a regular shape; the specific regular shape may be a ring shape in the present embodiment, or may be a regular polygon, an ellipse, or the like. In the present invention, the top outlet 310 of the third lift cylinder 31 is in communication with the inside of the can 1, i.e., a communication hole (not shown) is provided in the second top cover 301 to match the top outlet 310 of the third lift cylinder 31.

In a more specific implementation, 9 third lifting drums 31 are disposed inside the second lifting drum assembly 3, wherein 8 third lifting drums 31 are uniformly distributed in a ring shape along the inner side wall of the second housing sidewall 300, and the other third lifting drum 31 is disposed at the center of the second housing sidewall 300. Of course, in other embodiments of the present invention, the number and specific arrangement of the third lifting cylinders 31 inside the second housing sidewall 300 can be adjusted according to the requirements, and is not limited to the design of the present embodiment.

In the implementation process of this embodiment, the first housing sidewall 200, the first inner housing 203, and the second housing sidewall 300 are all configured as a cylindrical structure, and in other embodiments, the first housing sidewall 200, the first inner housing 203, and the second housing sidewall 300 may be configured as a rectangular parallelepiped shell.

In this embodiment, the aeration assembly has a second aeration pipe 42 extending into the lower end of the third lift cylinder 31, and as shown in fig. 2, 9, 11, and 12, the second aeration pipe 42 communicates with the aeration air input main trunk 40 through a second flange 420, and in other embodiments, the second aeration pipe 42 may also communicate with the aeration air input main trunk 40 by welding or bonding. The second aeration pipe 42 passes through the second top cover 301 of the second housing and extends downward to a position inside the second housing near the second bottom plate 302, and the second aeration pipe 42 is formed with a third aeration pipe branch 421 in a ring shape at a position inside the second housing near the second bottom plate 302, and the third aeration pipe branch 421 communicates with a main road (not shown in the figure) of the second aeration pipe 42 through a third aeration pipe branch switching portion 422. In the present embodiment, the third aeration tube branch 421 has a third bleed duct 4211 which extends into the interior of a number of third lift cylinders 31 which are arranged in a ring shape; the third lift cylinder 31 located at the center of the second housing also has a third bleed air duct 4211 introduced from a third aeration duct branch switching portion 422; the third air-entraining pipe 4211 is connected with a third aeration head 4210 for directly aerating the lower end inside the third lifting cylinder 31. The gas introduced into the second aeration line 42 from the aeration wind inlet trunk line 40 passes through the third aeration head 4210 and enters the third lift cylinder 31.

Referring to fig. 11, in some embodiments of the present invention, in order to enhance the sludge aeration effect, the aeration assembly further has an auxiliary aeration line 43 provided at a bottom position in the second housing, the auxiliary aeration line 43 being used to aerate the sewage at the periphery of the third lift cylinder 31 in the second housing. In this embodiment, the auxiliary aeration pipe 43 is annularly arranged on the upper side of the second base plate 302, and a plurality of auxiliary aeration heads 430 for aeration are uniformly arranged on the annular auxiliary aeration pipe 43 at intervals. In the specific implementation process, the gas in the auxiliary aeration pipeline 43 can be provided by the second aeration pipeline 42 or can be directly provided by the aeration wind input main pipeline 40.

In addition, it should be understood that the first aeration line 41, the second aeration line 42, and the auxiliary aeration line 43 in the above embodiment of the present invention all supply the air from the aeration wind inlet main line 40, but in the specific implementation process, the first aeration line 41, the second aeration line 42, and the auxiliary aeration line 43 may have different air sources. In this embodiment, the air provided by the aeration air input main trunk 40 is normal air, and in some other implementation processes, the air provided by the aeration air input main trunk 40 may be other gases such as oxygen-enriched air, and the first aeration pipeline 41, the second aeration pipeline 42, and the auxiliary aeration pipeline 43 may also be different gases respectively.

In addition, referring to fig. 2, in order to further enhance the biochemical effect of the sewage in the tank 1, in some embodiments of the present invention, an auxiliary aeration air port 13 is further provided on the sidewall 10 of the tank 1, the auxiliary aeration air port 13 is used for delivering gas into the tank 1, and in a specific implementation process, the gas entering from the auxiliary aeration air port 13 can be distributed and released by a gas dispersing mechanism to generate micro bubbles, and the sewage is supplemented with oxygen and stirred to enhance the biochemical effect.

In the present invention, the second lift cylinder assembly 3 has second fixing units for fixing the third lift cylinder 31 inside, and as shown in fig. 12, three sets of second fixing units for fixing the third lift cylinder 31 are provided in the present embodiment, respectively located at upper, middle and lower positions inside the second housing. As shown in connection with fig. 10 and 12, each set of second fixing units includes a plurality of second cross braces 32, a plurality of second clamping plates 33, and a second annular cover 34. A plurality of third lifting cylinders 31 which are arranged in an annular shape are clamped between the second annular cover 34 and the second cover shell side wall 300 and are fixed in a reinforced way through a second clamping plate 33. The outer periphery of the third lifting cylinder 31 located at the center of the second housing is abutted against the inner side of the second annular housing 34 through a plurality of second cross braces 32, and in order to prevent the second cross braces 32 from damaging the third lifting cylinder 31, a sheath (not labeled in the figure) can be sleeved at the position where the outer side of the third lifting cylinder 31 contacts with the second cross braces 32. In other embodiments of the present invention, the second fixing unit is not limited to the structure of the present embodiment, and the basic principle of the design is that: the sewage circulation inside the second lifting cylinder assembly 3 is not affected, and the stability of the internal structure of the second lifting cylinder assembly 3 can be ensured.

Referring to fig. 2 and 10, the second lift cylinder assembly 3 in this embodiment is further provided with a plurality of second column supports 35 at the bottom of the second bottom plate 302, and the second lift cylinder assembly 3 is fixed to the inside of the tank 1 by the second column supports 35.

In addition, in the present invention, the first bottom plate 202 or the first housing sidewall 200 is provided with a through hole (not shown) for allowing sewage to circulate inside each of the first lift cylinder assembly 2, the second lift cylinder assembly 3, the tank 1 and each other at a position near the first bottom plate 202, a bottom of the first lift cylinder 21 or a sidewall near the bottom of the first lift cylinder 21, a bottom of the second lift cylinder 22 or a sidewall near the bottom of the second lift cylinder 22, a position near the second bottom plate 302, a bottom of the third lift cylinder 31 or a sidewall near the bottom of the third lift cylinder 31 at the second bottom plate 302 or a sidewall near the second housing sidewall 300.

Based on the basic structure of the above embodiments, the working principle of the device according to the present invention is further described below:

when the device works, sewage enters the tank body 1 from the water inlet 11, and gas (air in the embodiment) is respectively led into the first lifting cylinder component 2 and the second lifting cylinder component 3 by the aeration component. Inside the second lifting cylinder assembly 3, the third aeration head 4210 at the lower end of the third lifting cylinder 31 releases gas and generates bubbles in the sewage, the bubbles float up inside the third lifting cylinder 31, oxygenation of the sewage is completed, the sewage is driven to rise along the inside of the third lifting cylinder 31, large-ratio multiple circulating flow of the sewage inside and outside the third lifting cylinder 31 is formed, and the sewage lifted to the top outlet 310 of the third lifting cylinder 31 flows back into the tank 1. Inside the first lifting cylinder assembly 2, the sewage is oxygenated and operates in the first lifting cylinder 21 and the second lifting cylinder 22 in a manner substantially identical to that of the third lifting cylinder 31, except that: only the sewage from the top outlet 220 of the second lifting cylinder 22 flows back into the tank 1, while the sewage from the top outlet 210 of the first lifting cylinder 21 enters the separator assembly through the sewage guiding mechanism and is precipitated and separated into the treated water flowing out from the water outlet 12 and the sludge flowing back into the tank 1 from the external circulation return port 500 in the precipitation zone 50 of the separator assembly.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The sewage treatment device comprises a tank body, wherein a water inlet for sewage to enter and a water outlet for treated water to drain are formed in the tank body; wherein,,

the first lifting cylinder assembly comprises a first housing, a plurality of first lifting cylinders and a plurality of second lifting cylinders, wherein the first lifting cylinders and the second lifting cylinders are arranged in the first housing;

the separator assembly is provided with a separation plate which is arranged opposite to the side wall of the tank body, and a sedimentation area for standing and separating sewage is formed between the separation plate and the side wall of the tank body; the sewage diversion mechanism comprises a containing cavity which is arranged at the top of the first housing and used for storing sewage, and a backflow channel which is communicated with the containing cavity and the sedimentation zone, wherein a top outlet of the first lifting cylinder is communicated with the containing cavity, a top outlet of the second lifting cylinder is communicated with the inside of the tank body, an external circulation backflow port which is communicated with the inside of the tank body is arranged at the bottom of the sedimentation zone, and the water outlet is communicated with the sedimentation zone;

the first housing comprises a first housing side wall, a first top cover and a first bottom plate, wherein the first top cover and the first bottom plate are arranged at the upper end and the lower end of the first housing side wall, two ends of a plurality of first lifting cylinders and two ends of a plurality of second lifting cylinders are respectively propped against the first top cover and the first bottom plate, a continuous cofferdam is formed by upward protruding of the upper side of the first top cover, the accommodating cavity is formed by surrounding the first top cover and the cofferdam, the outlet end of the backflow channel is propped against the upper end of the separation plate, and a plurality of through holes for discharging sewage into the sedimentation area are formed at the position of the separation plate, which is propped against the outlet end of the backflow channel;

the inner part of the tank body is also provided with a plurality of second lifting cylinder assemblies, each second lifting cylinder assembly comprises a second housing and a plurality of third lifting cylinders arranged in the second housing, the top outlets of the third lifting cylinders are communicated with the inner part of the tank body, the plurality of second lifting cylinder assemblies are vertically arranged in the tank body and are uniformly distributed into a regular shape, and the first lifting cylinder assemblies are vertically arranged at the central positions among the plurality of second lifting cylinder assemblies;

the aeration assembly is provided with a first aeration pipeline extending into the lower end of the first lifting cylinder and a second aeration pipeline extending into the lower end of the third lifting cylinder;

the second cover shell comprises a second cover shell side wall, a second top cover and a second bottom plate, wherein the second top cover and the second bottom plate are arranged at the upper end and the lower end of the second cover shell side wall, and two ends of the third lifting cylinder are respectively abutted to the second top cover and the second bottom plate;

2. The sewage treatment apparatus according to claim 1, wherein a first inner cover is further provided inside the first housing sidewall, the plurality of second lifting cylinders are uniformly interposed between the first housing sidewall and the first inner cover, and the plurality of first lifting cylinders are uniformly arranged in a regular shape inside the first inner cover.

3. The wastewater treatment plant of claim 1, wherein the aeration assembly further has an auxiliary aeration line disposed at a bottom location within the second enclosure for aerating wastewater within the second enclosure that is peripheral to the third lift cylinder.

4. The sewage treatment apparatus according to claim 1, wherein the lower end of the separation plate has an inclined plate section gradually closing up toward the side wall of the tank from top to bottom.

5. The sewage treatment apparatus according to claim 1, wherein a plurality of the third lifting cylinders are provided at a plurality of positions and at a center position on an inner periphery of the side wall of the second housing, and wherein the third lifting cylinders provided at a plurality of positions on an inner periphery of the side wall of the second housing are uniformly arranged in a regular shape.