CN217105494U - Sewage treatment device and system - Google Patents

Abstract

The utility model provides a sewage treatment device and system, sewage treatment device include the effluent water sump, be equipped with the overflow pipeline in the effluent water sump, overflow pipeline entrance point is located on the preset liquid level position, the effluent water sump is equipped with the evacuation pipeline outward, the exit end intercommunication of overflow pipeline to the evacuation pipeline, makes the overflow liquid in the effluent water sump, flows to the evacuation pipeline in through the overflow pipeline. The sewage treatment system comprises a plurality of sewage pools, overflow pipelines are arranged in the sewage pools, and inlet ends of the overflow pipelines are positioned above the preset liquid level; an emptying pipeline is arranged outside the sewage pool, and the outlet end of the overflow pipeline is communicated to the emptying pipeline; wherein the emptying pipelines of the dry sewage tank are connected to the discharge main pipe in series and/or in parallel. In some pipelines were located the effluent water sump, the pipeline that reduces to expose in the effluent water sump outside, the pipe arrangement was neat and artistic, when improving the security material saving, very big reduction fortune dimension cost.

Description

Sewage treatment device and system

Technical Field

The utility model relates to a sewage treatment technical field particularly, relates to a sewage treatment device and system.

Background

With the national emphasis on environmental protection, sewage treatment equipment is applied more and more. However, most of the existing sewage treatment equipment has design defects, so that the problems of difficult operation and maintenance and difficult management exist in practical application. Most of the existing sewage treatment equipment is not provided with an overflow device, and when the water inlet of the sewage treatment equipment is abnormally increased or a water passing hole of the equipment is blocked, sewage can emerge from the top of the equipment, randomly cross flows, seriously pollutes the environment and affects the sense organ; the sewage treatment equipment is also partially provided with an overflow device, but an overflow pipe of the sewage treatment equipment is directly connected with the outer wall of a tank body structure or a container from the liquid level horizontally, then pipelines are connected from top to bottom from the outside of the tank body, and the outer wall is provided with a plurality of auxiliary pipes, so that the appearance is influenced and certain potential safety hazards are caused; and overflow arrangement and emptying devices are all independently set up, and the pipeline is more, extravagant material, raise the cost.

The prior Chinese utility model with publication number CN204873936U entitled "ultra-high suction range semi-floating type oil remover in sewage treatment" discloses an ultra-high suction range semi-floating type oil remover in sewage treatment, which comprises a semi-floating collector, a collecting hose, a sewage pump, an overflow outlet, an overflow port valve, a liquid level sensor, a box body and a floating oil discharge port; the whole box body is of a square structure, the upper part of the left side wall of the box body is provided with a floating oil discharge port, and the upper part of the right side wall of the box body is provided with an overflow water outlet; the lower part of the left side wall of the box body is provided with a sewage pump which is connected with a semi-floating collector outside the box body through a collecting hose. An exhaust valve is arranged at the lower part of the right side wall of the box body. The sewage pump arranges the overflow drain at the sewage liquid level and discharges the sewage exceeding the preset liquid level through the overflow drain by an external pipeline; and set up the blowoff valve in bottom half and be used for the internal sewage of evacuation box, though the device can deal with the unusual increase's of equipment intaking condition, overflow drain department needs to lead sewage to the escape canal from the cell body outside, and the pipeline that uses is more, exposes in the outside pipeline of box also a lot, leads to the extrinsic pipeline to be mixed and disorderly, and the external pipeline suffers external force easily and destroys when the influence is perceived, has certain potential safety hazard.

The Chinese utility model patent with the publication number of CN209276213U entitled medical sewage treatment equipment with self-drainage function also discloses medical sewage treatment equipment with self-drainage function, which comprises a sewage treatment box, wherein an inverted U-shaped pipe or an inverted V-shaped pipe is arranged in the sewage treatment box, one end of the U-shaped pipe or the V-shaped pipe is open, and the other end of the U-shaped pipe or the V-shaped pipe is connected with a drainage pipe; when the water level in the sewage treatment tank is higher than the highest point of the U-shaped pipe or the V-shaped pipe, water in the sewage treatment tank is automatically discharged through the U-shaped pipe or the V-shaped pipe and the drain pipe. An overflow pipe is further arranged in the sewage treatment box, the upper end of the overflow pipe is higher than the highest point of the U-shaped pipe or the V-shaped pipe, and the lower end of the overflow pipe is communicated with a drain pipe. The bottom of sewage treatment case is equipped with the evacuation pipeline, be equipped with the blowoff valve on the evacuation pipeline. This sewage treatment device has also adopted the overflow pipe to solve the unusual increase of equipment intaking and the problem that brings to locate the bottom of water treatment case with the outlet of overflow pipe, but the pipeline of overflow pipe and evacuation pipeline's pipeline independently set up, have increased the unnecessary pipeline, and do not solve the mixed and disorderly problem that brings of pipeline, and maintain very inconveniently, the construction cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving at least the problems that the overflow device is unreasonable in arrangement, the overflow pipeline needs to be led to the drainage ditch or the discharge main pipe and other positions outside, the pipelines are messy, and the number of exposed pipelines outside is large; the overflow pipeline and the emptying pipeline are independently arranged, so that unnecessary pipelines are added, the overhaul and the maintenance are not facilitated, and one of the technical problems of construction cost is increased.

Therefore, the utility model discloses the first aspect provides a sewage treatment plant.

The utility model discloses the second aspect provides a sewage treatment system.

The utility model provides a sewage treatment device, including the effluent water sump, be equipped with the overflow pipeline in the effluent water sump, overflow pipeline entrance point is located on the preset liquid level position, the effluent water sump is equipped with the evacuation pipeline outward, the exit end intercommunication of overflow pipeline leads to the evacuation pipeline, makes the overflow liquid in the effluent water sump, flows to in the evacuation pipeline through the overflow pipeline.

In the sewage treatment device provided by the utility model, the overflow pipeline is used for discharging part of sewage higher than the preset liquid level in the sewage tank, so as to prevent the sewage from overflowing from the top of the device; the inlet end of the overflow pipeline is positioned above the preset liquid level position so as to ensure that the sewage is discharged through the overflow pipeline only when the sewage exceeds the preset liquid level; the emptying pipeline is used for emptying sewage in the sewage tank; the overflow pipeline is communicated with the emptying pipeline, so that the overflow pipeline and the emptying pipeline share a part of drainage pipeline, materials are saved, unnecessary pipelines are reduced, at least part of pipelines of the overflow pipeline are arranged in the sewage tank, the pipelines exposed to the outside are reduced, the pipeline arrangement is attractive, and the safety is improved.

According to the utility model discloses above-mentioned technical scheme's a sewage treatment plant can also have following additional technical characterstic:

in the technical scheme, the overflow pipeline comprises an overflow section, a drainage section and a discharge section which are communicated with each other, wherein the inlet end of the overflow section is positioned above the position of a preset liquid level; the discharge section penetrates through the sewage tank and extends out of the sewage tank to be communicated with the emptying pipeline.

In the technical scheme, the inlet end of the overflow section is higher than the preset liquid level, and when sewage exceeds the preset liquid level and reaches the position of the inlet end of the overflow section, the overflowing sewage enters the inlet end of the overflow section; the drainage section guides the sewage entering from the overflow port to a designated position, and the drainage section is fixed in the sewage tank, so that the external force damage can be prevented, and external pipelines can be reduced; the drainage section is connected with the output end of the drainage section, and the sewage in the drainage section is guided into an emptying pipeline arranged outside the sewage pool and is discharged through the emptying pipeline; it should be noted that the position where the discharge section penetrates the wall of the wastewater tank needs to be sealed to prevent the wastewater from leaking out of the connection position.

In the technical scheme, a horn-shaped overflow port is arranged at the inlet end of the overflow section, the overflow port is connected with the drainage section, and the overflow port is positioned above the preset liquid level; when the liquid in the sewage pool exceeds the height of the overflow port, the liquid flows into the overflow port and is discharged from the drainage section to the emptying pipeline.

In this technical scheme, the overflow mouth adopts the horn shape structure of narrow down wide from top to bottom, and the pipe diameter of overflow section is the trend of declining towards liquid level descending direction promptly to guarantee that the sewage that surpasss preset liquid level passes through the overflow mouth fast and gets into the drainage section, and the opening position of overflow section is the entry position of overflow mouth promptly and surpasss preset liquid level certain distance, just can discharge through the overflow mouth in order to guarantee only when sewage surpasss preset liquid level, the sewage that overflows the part.

In the technical scheme, the drainage section comprises a drainage tube and a first elbow, one end of the drainage tube is connected with the overflow port, the other end of the drainage tube is connected with the first elbow, and the first elbow is connected with the discharge section; the discharge section includes connecting pipe and delivery pipe, the connecting pipe passes the effluent water sump and communicates inside and outside the effluent water sump, the one end and the first elbow of connecting pipe are connected, the other end and the second elbow of connecting pipe are connected, be connected with the delivery pipe on the second elbow, the delivery pipe is connected to the evacuation pipeline.

In the technical scheme, the drainage tube can be a straight tube parallel to the wall of the sewage tank, or a certain angle is kept between the drainage tube and the wall of the sewage tank, sewage exceeding a preset liquid level flows for a certain distance in the sewage tank through the drainage tube, the drainage tube can be embedded in the wall of the sewage tank, or is fixed on the wall of the sewage tank through a pipeline clamp so as to reduce shaking, and the first elbow is used for changing the flow direction of the sewage in the drainage tube so as to enable the sewage to enter the discharge section; the connecting pipe can be a straight pipe which horizontally penetrates through the wall of the sewage pool and is communicated with the output end of the drainage pipe, and the second elbow is used for changing the flow direction of sewage in the connecting pipe so that the sewage flows to the emptying pipeline through the discharge pipe.

In the technical scheme, the emptying pipeline is communicated to the bottom of the sewage pool, and a drain valve is arranged on the emptying pipeline of the sewage pool and controls the discharge of the bottom of the sewage pool; the emptying pipeline is provided with a tee joint, and the discharge pipe is connected to the tee joint.

In the technical scheme, the emptying pipeline can be a straight pipe communicated with the bottom of the sewage pool, so that sewage in the sewage pool can be emptied conveniently as required, and the overflow pipeline is integrally higher than the emptying pipeline so as to reduce pipeline blockage caused by impurities in the sewage; the drain valve controls the opening and closing of the emptying pipeline, and particularly, the drain valve only controls the opening and closing of the emptying pipeline, so that the drain valve can be arranged between the tee joint and the wall of the sewage pool, the overflow pipeline cannot be controlled by the drain valve, and the overflow pipeline can normally work when sewage exceeds a preset liquid level even after the drain valve is closed;

the discharge pipe and the emptying pipeline can be connected through a switching device and can also be integrally formed, as the optimization, the discharge pipe is connected to the emptying pipeline through a tee joint, the tee joint is adopted for connecting the pipelines, the length and the position of the pipeline can be conveniently adjusted, and the pipeline layout is attractive.

The utility model also provides a sewage treatment system, which comprises a plurality of sewage pools, wherein overflow pipelines are arranged in the sewage pools, and the inlet ends of the overflow pipelines are positioned above the preset liquid level; an emptying pipeline is arranged outside the sewage pool, and the outlet end of the overflow pipeline is communicated to the emptying pipeline; wherein the emptying pipelines of the dry sewage tank are connected to the discharge main pipe in series and/or in parallel.

In the above technical scheme, the emptying pipelines of the sewage tank are respectively connected to the discharge main pipe, so that the emptying pipelines are connected in parallel, wherein any emptying pipeline is provided with a control valve.

In any of the above technical solutions, the overflow pipeline includes an overflow section, a drainage section and a discharge section which are communicated with each other, wherein a horn-shaped overflow port is arranged at an inlet end of the overflow section, the overflow port is located above a preset liquid level position, and the discharge section passes through the sewage tank and extends out of the sewage tank to be communicated with the emptying pipeline; the emptying pipeline is communicated to the bottom of the sewage pool, a drain valve is arranged on the emptying pipeline of the sewage pool, and the drain valve controls the discharge of the bottom of the sewage pool; the emptying pipeline is provided with a tee joint, and the discharging section is connected to the tee joint.

To sum up, owing to adopted above-mentioned technical characteristic, the beneficial effects of the utility model are that:

the utility model provides a sewage treatment device and a system, which can effectively discharge the sewage exceeding the preset liquid level to the outside of the equipment, effectively deal with the condition of abnormal increase of water inlet of the equipment and avoid the sewage from overflowing from the top of the equipment; part of overflow pipelines are arranged in the sewage pool, so that pipelines exposed outside the sewage pool are reduced, and the risk that external pipelines are damaged by external force is reduced; meanwhile, the overflow pipeline is communicated with the emptying pipeline, part of the drainage pipeline is shared, the normal work of the overflow pipeline cannot be influenced by opening and closing of the emptying pipeline, the pipeline arrangement is simplified, the pipeline arrangement is neat and attractive, materials are saved while the safety is improved, and the operation and maintenance cost is greatly reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a structural diagram of a sewage treatment apparatus according to an embodiment of the present invention.

Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:

1. an overflow line; 2. evacuating the line; 3. a sewage tank;

11. an overflow section; 12. a drainage section; 13. a discharge section;

111. an overflow port;

121. a drainage tube; 122. a first elbow;

131. a connecting pipe; 132. a discharge pipe; 133. a second elbow;

21. a tee joint; 22. and (4) draining the water valve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A sewage treatment apparatus according to some embodiments of the present invention will be described with reference to fig. 1.

Some embodiments of the present application provide a wastewater treatment plant.

As shown in fig. 1, the utility model discloses a first embodiment provides a sewage treatment device, including effluent water sump 3, be equipped with overflow pipeline 1 in the effluent water sump 3, overflow pipeline 1 entrance point is located on the predetermined liquid level position, effluent water sump 3 is equipped with evacuation pipeline 2 outward, the exit end intercommunication of overflow pipeline 1 to evacuation pipeline 2, makes the overflow liquid in the effluent water sump 3, flows out to evacuation pipeline 2 in through overflow pipeline 1.

In the sewage treatment device provided by the embodiment, the overflow pipeline 1 is used for discharging part of sewage higher than a preset liquid level in the sewage pool 3 so as to prevent the sewage from overflowing from the top of the device; the inlet end of the overflow pipeline 1 is positioned above the preset liquid level position to ensure that the sewage is discharged through the overflow pipeline 1 only when the sewage exceeds the preset liquid level; the emptying pipeline 2 is used for emptying sewage in the sewage tank 3; communicating the overflow pipeline 1 with the emptying pipeline 2, enabling the overflow pipeline and the emptying pipeline to share a part of drainage pipelines so as to save materials and reduce unnecessary pipelines, arranging at least part of pipelines of the overflow pipeline 1 in the sewage tank 3 so as to reduce the exposure of the pipelines to the outside, enabling the pipelines to be attractive in arrangement and improving the safety.

The second embodiment of the present invention provides a sewage treatment apparatus, and based on the first embodiment, as shown in fig. 1, the overflow pipeline 1 includes an overflow section 11, a drainage section 12 and a discharge section 13 which are communicated with each other, wherein an inlet end of the overflow section 11 is located above a preset liquid level position; the discharge section 13 passes through the sewage tank 3 and extends out of the sewage tank 3 to be communicated with the emptying pipeline 2.

In this embodiment, the inlet end of the overflow section 11 is higher than the preset liquid level, and when the sewage exceeds the preset liquid level and reaches the position of the inlet end of the overflow section 11, the overflowed sewage enters the inlet end of the overflow section 11; the drainage section 12 guides the sewage entering from the overflow port 111 to a designated position, and the drainage section 12 is fixed in the sewage tank 3, so that external force damage can be prevented, and external pipelines can be reduced; the discharge section 13 is connected with the output end of the drainage section 12, guides the sewage in the drainage section 12 into an emptying pipeline 2 arranged outside the sewage pool 3, and discharges the sewage through the emptying pipeline 2; it should be noted that the point where the discharge section 13 exits the wall of the basin 3 is sealed to prevent the discharge from leaking out of the connection.

The third embodiment of the present invention provides a sewage treatment apparatus, and on the basis of any of the above embodiments, as shown in fig. 1, the inlet end of the overflow section 11 is provided with a trumpet-shaped overflow port 111, the overflow port 111 is connected with the drainage section 12, and the overflow port 111 is located above the preset liquid level; when the liquid in the sewage tank 3 exceeds the height of the overflow port 111, the liquid flows into the overflow port 111 and is discharged from the drainage segment 12 to the emptying pipeline 2.

In this embodiment, the overflow port 111 is in a horn shape with a wide top and a narrow bottom, that is, the pipe diameter of the overflow section 11 is in a decreasing trend toward the descending direction of the liquid level to ensure that the sewage exceeding the preset liquid level quickly enters the drainage section 12 through the overflow port 111, and the opening position of the overflow section 11, that is, the inlet position of the overflow port 111 exceeds the preset liquid level by a certain distance to ensure that the sewage at the overflow part is discharged through the overflow port 111 only when the sewage exceeds the preset liquid level.

The fourth embodiment of the present invention provides a sewage treatment apparatus, and on the basis of any of the above embodiments, as shown in fig. 1, the drainage segment 12 includes a drainage tube 121 and a first elbow 122, one end of the drainage tube 121 is connected to the overflow port 111, the other end is connected to the first elbow 122, and the first elbow 122 is connected to the discharge segment 13; the discharge section 13 includes a connection pipe 131 and a discharge pipe 132, the connection pipe 131 passes through the wastewater tank 3 and communicates with the inside and the outside of the wastewater tank 3, one end of the connection pipe 131 is connected to the first elbow 122, the other end of the connection pipe 131 is connected to the second elbow 133, the discharge pipe 132 is connected to the second elbow 133, and the discharge pipe 132 is connected to the emptying pipe 2.

In this embodiment, the drainage tube 121 may be a straight tube parallel to the wall of the wastewater tank 3, or may be at a certain angle with the wall of the wastewater tank 3, the wastewater exceeding the preset liquid level flows inside the wastewater tank 3 for a certain distance through the drainage tube 121, the drainage tube 121 may be embedded in the wall of the wastewater tank 3, or may be fixed to the wall of the wastewater tank 3 through a pipe clamp, so as to reduce the sloshing, and the first elbow 122 is used to change the flow direction of the wastewater in the drainage tube 121, so as to allow the wastewater to enter the discharge section 13; the connection pipe 131 may be a straight pipe horizontally penetrating the wall of the wastewater tank 3 and communicating with the output end of the drainage pipe 121, and the second elbow 133 is used for changing the flow direction of wastewater in the connection pipe 131 so that the wastewater flows to the emptying pipe 2 through the discharge pipe 132.

The fifth embodiment of the present invention provides a sewage treatment apparatus, and based on any of the above embodiments, as shown in fig. 1, the emptying pipe 2 is connected to the bottom of the sewage tank 3, and a drain valve 22 is disposed on the emptying pipe 2 of the sewage tank 3, wherein the drain valve 22 controls the discharge of the bottom of the sewage tank 3; the evacuation pipeline 2 is provided with a tee joint 21, and the discharge pipe 132 is connected to the tee joint 21.

In this embodiment, the emptying pipeline 2 may be a straight pipe communicated with the bottom of the sewage tank 3, so as to facilitate emptying of sewage in the sewage tank 3 as required, and at this time, the overflow pipeline is integrally higher than the emptying pipeline 2, so as to reduce pipeline blockage caused by impurities in the sewage; the opening and closing of the emptying pipeline 2 are controlled through the drain valve 22, specifically, the drain valve 22 only controls the opening and closing of the emptying pipeline 2, so that the drain valve 22 can be arranged between the tee joint 21 and the wall of the sewage tank 3, the overflow pipeline 1 cannot be controlled by the drain valve 22, and even after the drain valve 22 is closed, when sewage exceeds a preset liquid level, the overflow pipeline 1 can normally work;

the discharge pipe 132 and the evacuation pipeline 2 may be connected by a switching device or may be integrally formed, and preferably, the discharge pipe 132 is connected to the evacuation pipeline 2 by a tee 21, and the tee 21 is used to connect the pipelines, so that the length and position of the pipelines can be conveniently adjusted, and the pipeline layout is beautiful.

Some embodiments of the present application provide a wastewater treatment system.

The sixth embodiment of the utility model provides a sewage treatment system, which comprises a plurality of sewage pools 3, wherein overflow pipelines 1 are arranged in the sewage pools 3, and the inlet ends of the overflow pipelines 1 are positioned above the preset liquid level; an emptying pipeline 2 is arranged outside the sewage pool 3, and the outlet end of the overflow pipeline 1 is communicated to the emptying pipeline 2; wherein the emptying pipelines 2 of the dry sewage tank 3 are connected to the discharge main pipe in series and/or in parallel.

The emptying pipelines 2 of the sewage pool 3 are respectively connected to the discharge main pipe, so that the emptying pipelines 2 are connected in parallel, and any emptying pipeline 2 is provided with a control valve.

The overflow pipeline 1 comprises an overflow section 11, a drainage section 12 and a discharge section 13 which are communicated with each other, wherein a horn-shaped overflow port 111 is arranged at the inlet end of the overflow section 11, the overflow port 111 is positioned above a preset liquid level position, and the discharge section 13 penetrates through the sewage tank 3 and extends out of the sewage tank 3 to be communicated with the emptying pipeline 2; the emptying pipeline 2 is communicated to the bottom of the sewage tank 3, a drain valve 22 is arranged on the emptying pipeline 2 of the sewage tank 3, and the drain valve 22 controls the discharge of the bottom of the sewage tank 3; the emptying pipeline 2 is provided with a tee joint 21, and the discharge section 13 is connected to the tee joint 21.

In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A sewage treatment plant, comprising a sewage tank (3), characterized in that: an overflow pipeline (1) is arranged in the sewage pool (3), the inlet end of the overflow pipeline (1) is positioned above a preset liquid level position, an emptying pipeline (2) is arranged outside the sewage pool (3), and the outlet end of the overflow pipeline (1) is communicated to the emptying pipeline (2), so that overflow liquid in the sewage pool (3) flows out of the emptying pipeline (2) through the overflow pipeline (1).

2. Sewage treatment plant according to claim 1, characterised in that said overflow line (1) comprises an overflow section (11), a drainage section (12) and a discharge section (13) communicating with each other, wherein the inlet end of the overflow section (11) is located above a predetermined level; the discharge section (13) penetrates through the sewage tank (3) and extends out of the sewage tank (3) to be communicated with the emptying pipeline (2).

3. The sewage treatment device according to claim 2, wherein the inlet end of the overflow section (11) is provided with a trumpet-shaped overflow port (111), the overflow port (111) is connected with the drainage section (12), and the overflow port (111) is positioned above a preset liquid level; when the liquid in the sewage pool (3) exceeds the height of the overflow port (111), the liquid flows into the overflow port (111) and is discharged from the drainage segment (12) to the emptying pipeline (2).

4. A sewage treatment plant according to claim 3, characterized in that said drainage section (12) comprises a drainage tube (121) and a first elbow (122), one end of said drainage tube (121) is connected to the overflow (111) and the other end is connected to the first elbow (122), said first elbow (122) is connected to the discharge section (13); the discharge section (13) comprises a connecting pipe (131) and a discharge pipe (132), the connecting pipe (131) penetrates through the sewage tank (3) and is communicated with the inside and the outside of the sewage tank (3), one end of the connecting pipe (131) is connected with a first elbow (122), the other end of the connecting pipe (131) is connected with a second elbow (133), the second elbow (133) is connected with the discharge pipe (132), and the discharge pipe (132) is connected to the emptying pipeline (2).

5. Sewage treatment plant according to claim 4, characterised in that said emptying pipe (2) is connected to the bottom of the sump (3) and that a drain valve (22) is arranged on the emptying pipe (2) of the sump (3), said drain valve (22) controlling the discharge at the bottom of the sump (3); and a tee joint (21) is arranged on the emptying pipeline (2), and the discharge pipe (132) is connected to the tee joint (21).

6. A sewage treatment system is characterized in that: the sewage treatment device comprises a plurality of sewage pools (3), wherein overflow pipelines (1) are arranged in the sewage pools (3), and the inlet ends of the overflow pipelines (1) are positioned above the preset liquid level; an emptying pipeline (2) is arranged outside the sewage tank (3), and the outlet end of the overflow pipeline (1) is communicated to the emptying pipeline (2); wherein the emptying pipelines (2) of the dry sewage pool (3) are connected to the discharge main pipe in series and/or in parallel.

7. The wastewater treatment system according to claim 6, wherein: the emptying pipelines (2) of the sewage pool (3) are respectively connected to the discharge main pipe, so that the emptying pipelines (2) are connected in parallel, and any emptying pipeline (2) is provided with a control valve.

8. A sewage treatment system according to claim 6 or 7 wherein: the overflow pipeline (1) comprises an overflow section (11), a drainage section (12) and a discharge section (13) which are communicated with each other, wherein a horn-shaped overflow port (111) is arranged at the inlet end of the overflow section (11), the overflow port (111) is positioned above a preset liquid level position, and the discharge section (13) penetrates through the sewage tank (3) and extends out of the sewage tank (3) to be communicated with the emptying pipeline (2); the emptying pipeline (2) is communicated to the bottom of the sewage tank (3), a drain valve (22) is arranged on the emptying pipeline (2) of the sewage tank (3), and the drain valve (22) controls the discharge of the bottom of the sewage tank (3); and a tee joint (21) is arranged on the emptying pipeline (2), and the discharge section (13) is connected to the tee joint (21).

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