CN219489800U

CN219489800U - Domestic wastewater treatment device

Info

Publication number: CN219489800U
Application number: CN202320833189.7U
Authority: CN
Inventors: 林露; 明亮
Original assignee: Sichuan Gaoxin Purification Equipment Co ltd
Current assignee: Sichuan Gaoxin Purification Equipment Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-08-08
Anticipated expiration: 2033-04-14

Abstract

The utility model relates to a domestic wastewater treatment device, which comprises an interception module, an oil removal separation module, a material adding treatment module, a sedimentation module and a disinfection module which are sequentially connected, wherein the interception module comprises an interception tank, interception pieces and a blowing unit, wherein the interception pieces are arranged on two opposite tank walls of the interception tank in a mode of penetrating through the side walls of the interception tank, the interception pieces are arranged on the two tank walls at intervals along the axial direction of the interception tank in a staggered mode, an opening for inserting the interception pieces is formed in the tank wall of the interception tank, and the blowing unit is arranged on the outer tank wall of the interception tank above the opening in a mode of blowing and cleaning part of the body surface of the interception piece, which is positioned outside the interception tank; the outer pool wall of the interception pool is also provided with a first storage cavity which can wrap the interception piece and the purging unit and collect first sundries separated from the interception piece.

Description

Domestic wastewater treatment device

Technical Field

The utility model relates to the technical field of water treatment equipment, in particular to a domestic wastewater treatment device.

Background

The domestic wastewater is sewage generated in the life of urban residents, a large amount of various impurities exist, and as the domestic wastewater is wastewater generated in the life process of people, a large amount of organic matters exist, harmful substances and other components or individuals which are harmful to human health are extremely easy to generate in a conveying environment, and the domestic wastewater cannot be directly discharged into the ecological environment, so that in order to avoid the waste of water resources and reduce the pollution of the domestic wastewater to the ecological environment, a professional sewage treatment plant is generally required to separate, filter and purify the domestic wastewater.

Chinese patent publication No. CN110255817a discloses a domestic wastewater treatment device. The utility model provides a domestic wastewater treatment device, includes anaerobic tank, good oxygen pond, sedimentation tank, disinfection pond and carries sewage to pass through the conveying component in anaerobic tank, good oxygen pond, sedimentation tank, disinfection pond in proper order, install water circulation mechanism in the good oxygen pond, water circulation mechanism includes the heliciform rotary vane that sets up along vertical direction and drives heliciform rotary vane pivoted driving motor. The sewage is conveyed by the conveying component to sequentially pass through the anaerobic tank, the aerobic tank, the sedimentation tank and the disinfection tank to be sequentially treated. The driving motor drives the spiral rotary vane to rotate. Although the device can promote the aerobic decomposition rate of specific substances in domestic wastewater to a certain extent, the device and other prior art have the defect that the device can not effectively and synchronously finish the discharge treatment of separated impurities in the treatment process of domestic wastewater. In the prior art, when separating impurities from domestic wastewater, the impurities are generally deposited at the bottom of a treatment tank or are intercepted in a tank cavity of the treatment tank by utilizing a fence grid structure, so that the device only allows the domestic wastewater from which specific components are separated to flow into a lower-level treatment tank. However, the above-mentioned prior art will appear the siltation of debris after lasting the domestic wastewater of certain time, leads to the unable effective and debris separation that carries out domestic wastewater of treatment pond continuously, and above-mentioned treatment pond needs to carry out the treatment pond clearance regularly, causes the comprehensive purification efficiency decline of treatment pond when having increased relevant staff's work load, leads to current processing apparatus unable effective meeting the domestic wastewater treatment demand of growing.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present utility model was made, the text is not limited to details and contents of all that are listed, but it is by no means the present utility model does not have these prior art features, the present utility model has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.

Disclosure of Invention

The utility model aims to provide a domestic wastewater treatment device capable of continuously discharging separated impurities in the process of separating the impurities so as to improve the continuous separation efficiency of the device, so as to solve the problems that the existing device needs to periodically clean the deposited separated impurities, the comprehensive purification treatment efficiency of the domestic wastewater with long period of the device is low, and the treatment requirements of increasingly-increased domestic wastewater cannot be met.

The technical scheme adopted by the utility model is as follows: the domestic wastewater treatment device comprises an interception module, an oil removal separation module, a material adding treatment module, a sedimentation module and a disinfection module which are sequentially connected, wherein the interception module comprises an interception tank, an interception member and a blowing unit, the interception member is arranged on two opposite tank walls of the interception tank in a manner of penetrating through the side walls of the interception tank, the interception member is arranged on the two tank walls at intervals along the axial direction of the interception tank in a staggered manner, an opening for inserting the interception member is formed in the tank wall of the interception tank, and the blowing unit is arranged on the outer tank wall of the interception tank above the opening in a manner of blowing and cleaning part of the body surface of the interception member, which is positioned outside the interception tank; the outer pool wall of the interception pool is also provided with a first storage cavity which can wrap the interception piece and the purging unit and collect first sundries separated from the interception piece.

According to a preferred embodiment, the interception members which are distributed in a staggered manner are obliquely arranged in the interception tank so that domestic wastewater can directionally slide down along the surface of the interception members under the action of gravity, and the interception members comprise positioning wheel rollers, driving members and a conveying belt, wherein the two axial ends of the driving wheel rollers are rotatably inserted on the inner tank wall of the interception tank through shaft rods; the positioning wheel roller is supported on the outer side of the interception tank through a bracket, the conveyor belt forming the inclined surface of the interception member is sleeved on the positioning wheel roller and the driving wheel roller with height difference, and the driving wheel roller is in transmission connection with a driving member arranged on the outer side of the interception tank through a shaft rod penetrating through the tank wall of the interception tank.

According to a preferred embodiment, a plurality of interception posts capable of intercepting the first sundries to realize preliminary solid-liquid separation are arranged on the surface of the conveyor belt in an array manner, and a plurality of interception posts in the same horizontal row are parallel to each other; the interception column is arranged in a mode of forming an included angle with the surface of the conveyor belt, so that when the conveyor belt winds around the positioning wheel roller, the purging unit can separate first sundries attached to the interception column.

According to a preferred embodiment, the upper edge of the opening is provided with a baffle extending towards the inside of the interception cell, so that the baffle is able to block the gap between the upper edge of the opening and the surface of the interception element.

According to a preferred embodiment, the side wall of the axial upper end of the interception tank is further provided with a flat water inlet pipe, an output port of the flat water inlet pipe extends into the tank cavity of the interception tank, and a vertical plate is further arranged on the surface of the cover plate of the interception tank facing the tank cavity of the interception tank.

According to a preferred embodiment, the deoiling separation module comprises a first cavity, an upper layer output pipeline and a middle layer output pipeline, wherein the input end of the first cavity is connected with the output end of the interception module through a conveying mechanism, the output end of the first cavity is communicated with the upper layer output pipeline and the middle layer output pipeline, and a gate capable of adjusting output flow is arranged at the pipeline inlet of the middle layer output pipeline.

According to a preferred embodiment, the output end of the upper output pipeline is connected with a conveying mechanism, the conveying mechanism adsorbs and transfers second impurities existing on the surface of the domestic wastewater contained in the first cavity, and a scraper capable of removing the second impurities on the surface of the conveying mechanism is arranged at one end, far away from the upper output pipeline, of the conveying mechanism.

According to a preferred embodiment, one end of the scraper plate, which is arranged obliquely and is far away from the conveying mechanism, is connected with a second storage cavity, and a reflux mechanism capable of refluxing waste water from which second sundries are separated into the first cavity is arranged below the conveying mechanism.

According to a preferred embodiment, the material adding processing module comprises a second cavity, a stirring piece and a material adding pipeline, wherein the stirring piece is arranged in the second cavity, and the material adding pipeline is arranged in a rod body of the stirring piece.

According to a preferred embodiment, the axial upper end of the stirring piece is rotatably connected with a cover body arranged at the axial upper end of the second cavity, and the material adding pipeline is communicated with an inflator pump arranged on the upper surface of the cover body.

The beneficial effects of the utility model are as follows:

the application sets up a plurality of interception pieces that are the acute angle with the axis in interception pond through in interception pond for domestic waste water can be filtered first debris by the interception piece that multistage laid when flowing through the interception piece. Preferably, the first impurities mainly refer to large volumes of impurities floating in domestic wastewater. The multistage layout can effectively ensure that the first sundries can be intercepted for many times and fully separated from the domestic wastewater.

This application is through setting up can follow the conveyer belt that carries out the transmission with the opposite direction of rivers direction for the conveyer belt can drive the interception post and shift out the interception pond with the mode of translation, thereby makes interception post separated first debris can drop on thereby the conveyer belt in the first storage chamber of the outside in interception pond and be collected in first storage chamber. In addition, to the first debris that partly adheres to on the interception post surface and can not drop by oneself, this application sets up the unit that sweeps in the top of open-ended for the unit that sweeps makes the first debris on conveyer belt and the interception post by the mode of the directional air current of blowout separated. Finally, the conveyer belt of this application can drive the interception post that accomplishes first debris separation and get back to the interception pond again in for conveyer belt and interception post can be through the discharge of continuous motion incessantly accomplishing first debris, thereby hoisting device's last debris separation efficiency, so that device treatment effeciency obtains promoting, and last interception post by the clearance can keep a higher interception effect, make first debris can take place effectual separation with domestic waste water in the interception pond.

Drawings

FIG. 1 is a schematic diagram of a preferred domestic wastewater treatment plant according to the present utility model;

FIG. 2 is a schematic diagram of the interception module of a preferred domestic wastewater treatment device according to the present utility model;

FIG. 3 is a schematic plan view of a portion of a conveyor belt of a preferred sanitary wastewater treatment facility according to the present utility model;

FIG. 4 is a schematic diagram of the structure of a deoiling and separating module of a preferred domestic wastewater treatment device according to the present utility model;

fig. 5 is a schematic structural view of a material-increasing treatment module of a preferred domestic wastewater treatment device according to the present utility model.

List of reference numerals

1: an interception module; 2: a deoiling and separating module; 3: a material adding processing module; 4: a precipitation module; 5: a sterilization module; 6: a conveying mechanism; 11: intercepting a pool; 12: an interceptor; 13: a purge unit; 14: a first storage chamber; 21: a first cavity; 22: an upper layer output pipeline; 23: a middle layer output pipeline; 24: a gate; 25: a conveying mechanism; 26: a scraper; 27: a second storage chamber; 28: a reflow mechanism; 31: a second cavity; 32: a stirring member; 33: a material adding pipeline; 34: a cover body; 35: an inflator pump; 111: an opening; 112: a baffle; 113: a water inlet flat tube; 114: a cover plate; 115: a riser; 121: positioning wheel rollers; 122: a driving wheel roller; 123: a driving member; 124: a conveyor belt; 125: a bracket; 126: and a interception column.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

The technical solution provided by the present utility model will be described in detail by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model. In some instances, some embodiments are not described or described in detail as such, as may be known or conventional in the art.

Furthermore, features described herein, or steps in all methods or processes disclosed, may be combined in any suitable manner in one or more embodiments in addition to mutually exclusive features and/or steps. It will be readily understood by those skilled in the art that the steps or order of operation of the methods associated with the embodiments provided herein may also be varied. Any order in the figures and examples is for illustrative purposes only and does not imply that a certain order is required unless explicitly stated that a certain order is required.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling) where appropriate (where no paradox is constructed).

The following detailed description refers to the accompanying drawings.

Example 1

The application provides a domestic wastewater treatment device, it includes interception module 1, deoiling separation module 2, increase material processing module 3, precipitation module 4, disinfection module 5 and conveying mechanism 6.

According to a specific embodiment shown in fig. 1, the interception module 1, the deoiling and separating module 2, the material adding and processing module 3, the sedimentation module 4 and the disinfection module 5 are sequentially communicated through the conveying mechanism 6, so that different wastewater treatments and waste material separation treatments can be completed in the interception module 1, the deoiling and separating module 2, the material adding and processing module 3, the sedimentation module 4 and the disinfection module 5 of domestic wastewater flowing into the device. The conveying mechanism 6 is arranged in a manner that domestic wastewater existing in the two modules communicated with the conveying mechanism can be directionally conveyed. The conveying mode of the conveying mechanism 6 for the domestic wastewater is set to be active conveying and passive conveying according to the height difference between the adjacent modules and the height difference of the pipeline inlet and the pipeline outlet of the conveying mechanism 6, so that the domestic wastewater can flow directionally in the device.

As shown in fig. 2, the interception module 1 includes an interception cell 11, an interception member 12, a purge unit 13, and a first storage chamber 14. The interception tank 11 can be connected with an output port of a pipeline for delivering domestic wastewater in towns. Further preferably, the interception member 12 is disposed on two opposite tank walls of the interception tank 11 in a manner of penetrating through the side walls of the interception tank 11, and the interception member 12 is disposed on the two tank walls at intervals along the axial direction of the interception tank 11 in a staggered manner, so that the first sundries in the domestic wastewater can be intercepted by the interception member and transported out of the interception tank 11, and an opening 111 for inserting the interception member 12 is formed on the tank wall of the interception tank 11. Preferably, the axially staggered arrangement means that the interception members 12 penetrating through the side walls of the tank cavity of the interception tank 11 are alternately arranged on the side walls of the tank cavity formed by stacking from top to bottom, so that the inclined interception members 12 can enable the domestic wastewater filtered of the first impurity to fall along the lower end of the inclined plane constructed by the inclined interception members 12 and fall on the upper surface of the interception member 12 arranged on the side wall of the tank cavity at the other side. The application sets up a plurality of interception pieces 12 that are the acute angle with the axis in interception pond 11 through in interception pond 11 for domestic waste water can be filtered first debris by the interception piece 12 that multistage laid when flowing through interception piece 12. Preferably, the first impurities mainly refer to large volumes of impurities floating in domestic wastewater. The multistage layout can effectively ensure that the first sundries can be intercepted for many times and fully separated from the domestic wastewater. Preferably, the purge unit 13 is provided on the outer tank wall of the interception tank 11 above the opening 111 in such a manner that the part of the body surface of the interception member 12 located outside the interception tank 11 can be purged by blowing. A first storage chamber 14 capable of wrapping the interception member 12 and the purge unit 13 and collecting the first foreign matters separated from the interception member 12 is further provided on the outer wall of the interception tank 11.

Preferably, the upper edge of the opening 111 is provided with a baffle 112 extending toward the inside of the interceptor cell 11 so that the baffle 112 can block the gap between the upper edge of the opening 111 and the surface of the interceptor member 12. The baffle 112 is provided to prevent the domestic wastewater falling on the conveyor 124 from moving counter-currently into the first storage chamber 14 due to excessive momentum. The side wall of the axial upper end of the interception tank 11 is also provided with a water inlet flat pipe 113, an output port of the water inlet flat pipe 113 extends into a tank cavity of the interception tank 11, and a vertical plate 115 is further arranged on the surface of a cover plate 114 of the interception tank 11 facing the tank cavity of the interception tank 11. Preferably, the width of the water inlet flat pipe 113 is approximately equal to the width of the conveyor belt 124, so that the domestic wastewater to be treated output by the water inlet flat pipe 113 falls on the conveyor belt 124 in a flat output manner. Preferably, the riser 115 is provided to compensate for the defect that part of domestic wastewater falls outside the conveyor belt 124 due to parabolic motion of the domestic wastewater outputted from the water inlet flat pipe 113 due to pressure change, and limit that the domestic wastewater can fall on the uppermost conveyor belt 124.

Preferably, the interception members 12 are arranged in a staggered manner in the interception pond 11 so that domestic waste water can be directed to slide down the surface of the interception member 12 by gravity. Further preferably, the interceptor member 12 includes a positioning roller 121, a driving roller 122, a driver 123, and a conveyor belt 124. The two axial ends of the driving wheel roller 122 are rotatably inserted on the inner tank wall of the interception tank 11 through a shaft lever. The positioning wheel roller 121 is supported at the outside of the interception pond 11 by a bracket 125. It is further preferred that the positioning roller 121 and the driving roller 122 having a height difference are sleeved with a conveyor belt 124 constituting the inclined surface of the interceptor member 12. The conveyor belt 124 can form an inclined plane between the positioning roller 121 and the driving roller 122 so that the domestic wastewater falling in the interception pond 11 can change the flow direction on the conveyor belt 124. Preferably, the driving wheel roller 122 is in transmission connection with a driving member 123 arranged outside the interception tank 11 through a shaft rod penetrating through the tank wall of the interception tank 11, so that the driving wheel roller 122 can drive the positioning wheel roller 121 and the conveyor belt 124 to synchronously rotate under the driving of the driving member 123.

As shown in fig. 3, a plurality of interception posts 126 capable of intercepting the first sundries to perform preliminary solid-liquid separation are arranged on the surface of the conveyor belt 124 in an array manner, and a plurality of interception posts 126 in the same horizontal row are parallel to each other. Preferably, the interception post 126 is disposed to form an angle with the surface of the conveyor belt 124, so that the purge unit 13 can separate the first foreign material attached to the interception post 126 when the conveyor belt 124 winds around the positioning roller 121. It is further preferable that the interception post 126 is disposed in parallel with the axis of the interception cell 11 such that an acute angle is formed between the interception post 126 and the surface of the inclined conveyor belt 124, so that the interception post 126 can intercept foreign matters in the domestic wastewater flowing down along the inclined surface of the conveyor belt 124 better by the interception post 126. Preferably, the width of the conveyor belt 124 and the lengths of the positioning wheel roller 121 and the driving wheel roller 122 are approximately equal to the transverse width of the interception tank 11, so that domestic wastewater can only flow along the conveyor belt 124 and cannot directly fall into the bottom of the interception tank 11 from a gap between two sides of the conveyor belt 124 and the tank wall of the interception tank 11, thereby ensuring effective sundry separation treatment of the domestic wastewater by the interception tank 11. Preferably, the column unit elements forming the interception post 126 can form an interception net by combining the transverse and longitudinal directions, so that the interception net structure can better separate out the first sundries with larger volume in the domestic wastewater. Preferably, the first debris may be a flocculent debris such as paper towels. The conveyor belt 124 capable of driving in the direction opposite to the water flow direction is arranged, so that the conveyor belt 124 can drive the interception post 126 to move out of the interception pond 11 in a translational mode, and first sundries separated by the interception post 126 can fall off from the conveyor belt 124 in the first storage cavity 14 outside the interception pond 11 and are collected in the first storage cavity 14. In addition, for the first sundries which are partially attached to the surface of the interception post 126 and can not automatically fall off, the purging unit 13 is arranged above the opening 111, so that the purging unit 13 enables the conveyor belt 124 and the first sundries on the interception post 126 to be separated in a mode of spraying directional airflow. Finally, the conveyor belt 124 of the present application can drive the interception post 126 that completes the separation of the first sundries to get back to the interception tank 11 again, so that the conveyor belt 124 and the interception post 126 can continuously complete the discharge of the first sundries through continuous movement, thereby improving the continuous sundry separation efficiency of the device, so that the device treatment efficiency is improved, and the interception post 126 that is continuously cleaned can keep a higher interception effect, so that the first sundries can be effectively separated from the domestic wastewater in the interception tank 11.

As shown in fig. 4, the degreasing separation module 2 includes a first chamber 21, an upper layer output pipe 22, and a middle layer output pipe 23. The input end of the first cavity 21 is connected with the output end of the interception module 1 through the conveying mechanism 6. Specifically, the output end of the first cavity 21 is communicated with an upper layer output pipeline 22 and a middle layer output pipeline 23, and a gate 24 capable of adjusting output flow is arranged at the pipeline inlet of the middle layer output pipeline 23. The river gate structure is obtained by simply adjusting the structure, the related legend of the application is only used for representing the simple position relationship, and specific structural details can be directly referred to the structure of the irrigation river gate mechanism. Preferably, the output end of the upper layer output pipeline 22 is connected with a conveying mechanism 25, the conveying mechanism 25 adsorbs and transfers second impurities existing on the surface of the domestic wastewater contained in the first cavity 21, and one end of the conveying mechanism 25 away from the upper layer output pipeline 22 is provided with a scraping plate 26 capable of removing the second impurities on the surface of the conveying mechanism 25. Preferably, the surface of the transfer mechanism 25 is provided with an oleophilic coating so that impurities such as grease floating on the surface of domestic wastewater can be effectively separated. One end of the scraper 26, which is arranged in an inclined manner, far away from the conveying mechanism 25 is connected with a second storage cavity 27, and a reflux mechanism 28 which can reflux the wastewater from which the second sundries are separated into the first cavity 21 is arranged below the conveying mechanism 25. Preferably, the second impurities are mainly grease impurities floating on the surface of the domestic wastewater. The return mechanism 28 comprises a collection chamber, a drive pump and a line communicating with the input of the first chamber 21. The middle layer output pipeline 23 is also provided with a driving pump capable of driving the flow rate of the domestic water from which the second sundries are separated.

As shown in fig. 5, the charge processing module 3 includes a second chamber 31, a stirring member 32, and a charge pipe 33. Specifically, the stirring member 32 is disposed in the second cavity 31, and a material adding pipe 33 is disposed in the rod body of the stirring member 32. Further preferably, the axial upper end of the stirring member 32 is rotatably connected to a cover 34 provided at the axial upper end of the second chamber 31, and the charge pipe 33 is communicated with an inflator 35 provided at the upper surface of the cover 34. Preferably, the inflator 35 can be replaced according to the requirements so that the material adding pipeline 3 is not only used for conveying oxygen, but also used for conveying other chemical substances or medicaments capable of precipitating, separating substances and purifying domestic wastewater.

Preferably, the sedimentation module 4 and the disinfection module 5 can be directly selected from the treatment tank or treatment tank structures in the prior art. For the prior art part, the application will not be repeated.

The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

Claims

1. The domestic wastewater treatment device comprises an interception module (1), an oil removal separation module (2), a material adding treatment module (3), a precipitation module (4) and a disinfection module (5) which are connected in sequence, and is characterized in that,

the interception module (1) comprises an interception tank (11), an interception piece (12) and a purging unit (13), wherein,

the interception members (12) are arranged on two opposite tank walls of the interception tank (11) in a mode of penetrating through the side walls of the interception tank (11), the interception members (12) are arranged on the two tank walls at intervals along the axial direction of the interception tank (11), openings (111) for inserting the interception members (12) are formed in the tank walls of the interception tank (11),

the purging unit (13) is arranged on the outer tank wall of the interception tank (11) above the opening (111) in a mode of being capable of cleaning the surface of a part of the body, located outside the interception tank (11), of the interception member (12) in a blowing mode;

the outer tank wall of the interception tank (11) is also provided with a first storage cavity (14) which can wrap the interception piece (12) and the purging unit (13) and collect first sundries separated from the interception piece (12).

2. The domestic wastewater treatment device according to claim 1, wherein the interception members (12) are arranged in the interception tank (11) in an inclined manner in a staggered manner so that domestic wastewater can directionally slide down the surface of the interception members (12) under the action of gravity,

the interception member (12) comprises a positioning wheel roller (121), a driving wheel roller (122), a driving member (123) and a conveying belt (124), wherein,

the two axial ends of the driving wheel roller (122) are rotatably inserted on the inner tank wall of the interception tank (11) through shaft rods; the positioning wheel roller (121) is supported on the outer side of the interception tank (11) through a support (125), the positioning wheel roller (121) and the driving wheel roller (122) with height difference are sleeved with the conveying belt (124) forming the inclined surface of the interception member (12), and the driving wheel roller (122) is in transmission connection with a driving member (123) arranged on the outer side of the interception tank (11) through a shaft rod penetrating through the tank wall of the interception tank (11).

3. The domestic wastewater treatment device according to claim 2, wherein a plurality of interception columns (126) capable of intercepting the first sundries to realize preliminary solid-liquid separation are arranged on the surface of the conveyor belt (124) in an array manner, and a plurality of interception columns (126) arranged in the same horizontal row are parallel to each other;

the interception column (126) is arranged in a mode of forming an included angle with the surface of the conveyor belt (124), so that when the conveyor belt (124) winds around the positioning wheel roller (121), the purging unit (13) can separate first sundries attached to the interception column (126).

4. A domestic wastewater treatment device according to claim 3, characterized in that the upper edge of the opening (111) is provided with a baffle (112) extending towards the interior of the interception tank (11) so that the baffle (112) can block the gap between the upper edge of the opening (111) and the surface of the interception member (12).

5. The domestic wastewater treatment device according to claim 4, wherein a water inlet flat pipe (113) is further arranged on the side wall of the axial upper end of the interception tank (11), an output port of the water inlet flat pipe (113) extends into the tank cavity of the interception tank (11), and a vertical plate (115) is further arranged on the surface of a cover plate (114) of the interception tank (11) facing the tank cavity of the interception tank (11).

6. The domestic wastewater treatment device according to claim 5, wherein the deoiling and separating module (2) comprises a first cavity (21), an upper layer output pipeline (22) and a middle layer output pipeline (23),

the input end of the first cavity (21) is connected with the output end of the interception module (1) through a conveying mechanism (6),

the output end of the first cavity (21) is communicated with the upper layer output pipeline (22) and the middle layer output pipeline (23), and a gate (24) capable of adjusting output flow is arranged at the pipeline inlet of the middle layer output pipeline (23).

7. The domestic wastewater treatment device according to claim 6, wherein the output end of the upper layer output pipeline (22) is connected with a conveying mechanism (25), the conveying mechanism (25) adsorbs and transfers second impurities existing on the surface of the domestic wastewater accommodated in the first cavity (21), and a scraper (26) capable of removing the second impurities on the surface of the conveying mechanism (25) is arranged at one end of the conveying mechanism (25) away from the upper layer output pipeline (22).

8. The domestic wastewater treatment device according to claim 7, wherein a second storage cavity (27) is connected to one end of the scraper (26) which is obliquely arranged away from the conveying mechanism (25), and a backflow mechanism (28) which can backflow wastewater from which second sundries are separated into the first cavity (21) is arranged below the conveying mechanism (25).

9. The domestic wastewater treatment device according to claim 8, wherein the material adding treatment module (3) comprises a second cavity (31), a stirring piece (32) and a material adding pipeline (33), wherein the stirring piece (32) is arranged in the second cavity (31), and a material adding pipeline (33) is arranged in a rod body of the stirring piece (32).

10. The domestic wastewater treatment device according to claim 9, wherein the axial upper end of the stirring piece (32) is rotatably connected with a cover body (34) arranged at the axial upper end of the second cavity (31), and the material adding pipeline (33) is communicated with an inflator pump (35) arranged on the upper surface of the cover body (34).