CN114699821A - Sewage treatment device and combined system sewage discharge system - Google Patents

Abstract

The invention discloses a sewage treatment device, which comprises a first vertical shaft and a second vertical shaft, wherein the first vertical shaft and the second vertical shaft form a communicating vessel, the upper part of the first vertical shaft is connected with a water inlet pipe, the upper part of the second vertical shaft is connected with a water outlet pipe, and the height of the bottom of the water inlet pipe is higher than that of the bottom of the water outlet pipe; a filter layer is also formed in the second shaft. The sewage treatment device further comprises a backwashing pump and an air blower, a water collecting pipe and an aeration pipe are further arranged at the lower portions of the first vertical shaft and the second vertical shaft, the water collecting pipe is connected to the backwashing pump, the air blower is connected to the air blower, filtered water at the upper portion of the second vertical shaft is reversely pumped after the backwashing pump is started to backwash a filtering layer of the second vertical shaft, and the water collecting pipe is used for collecting dirty water after backwashing and recovering efficient filtering efficiency of the filtering layer through backwashing. The invention also discloses a combined system sewage discharge system, wherein a sewage treatment device is connected in the combined system pipe network, so that overflow sewage can be effectively treated, and the pollution of the overflow sewage is avoided.

Description

Sewage treatment plant and combined sewage discharge system

technical field

The invention belongs to the technical field of sewage discharge and treatment, and relates to a sewage discharge and treatment device.

Background technique

After rainfall occurs, the flow in the combined pipeline will increase with the increase of rainfall. When the pipeline flow exceeds the design capacity of the sewage treatment plant or sewage collection system, the excess part is directly discharged by overflow, which is called combined overflow. stream pollution.

In recent years, most of the newly built urban drainage pipe networks have adopted the rain and sewage diversion system. However, due to historical reasons, most of the old urban areas in China still retain the combined drainage system. In the process of black and odorous water treatment and sponge city construction, some small and medium-sized cities are constrained by the local government’s financial or underground pipeline constraints, and it is difficult to effectively promote the transformation of the combined pipeline system, and the overflow of sewage is more common. Smelly "has become a difficult "pain point" for the management unit to soothe, seriously restricting the improvement of the water environment. Therefore, for the overflow sewage that exceeds the interception scale, it is necessary to carry out terminal strengthening treatment to ensure the water environment quality of the discharged water body.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a sewage treatment device, which can perform terminal treatment on the overflow sewage beyond the interception scale.

A sewage treatment device, comprising a first pipe and a second pipe, the bottoms of the first pipe and the second pipe are connected to form a communication device, the first pipe is connected with a water inlet pipe, and the second pipe is connected with an outlet pipe. In the water pipe, a filter layer is formed in the second pipe, and the liquid level in the water inlet pipe is always higher than the liquid level in the water outlet pipe.

Optionally, the liquid level in the water inlet pipe is at least 30 cm higher than the liquid level in the water outlet pipe.

Optionally, the first pipe is a first shaft, the second pipe is a second shaft, a communication pipe is provided at the bottom of the first shaft and the second shaft, and the first shaft and the second shaft communicate with each other. Tube connection.

Optionally, the filter layer is composed of suspended filter material, and a partition screen is provided on the top of the filter layer.

Optionally, a backwash pump is also included; a water collection pipe is arranged in the second shaft, the water collection pipe is arranged below the filter layer, the water collection pipe is connected with the water inlet of the backwash pump, and the backwash pump A return pipe is connected to the water outlet.

Optionally, it also includes a blower; an aeration pipe is arranged in the second shaft, the aeration pipe is connected to the blower, and the aeration pipe is arranged under the filter layer; the aeration pipe is evenly arranged with Multiple aeration pans.

Optionally, the density of the suspended filter material is not greater than 0.9g/cm3, and the mesh diameter of the separator is not greater than 2cm.

Optionally, the backwash strength of the backwash pump is 6L/(s·m ² )˜15L/(s·m ² ).

Optionally, the rising velocity of the water body in the second shaft is set to be 8-16 m/h.

Optionally, the first shaft and the second shaft are provided with a common wall.

Optionally, an overpass pipe is connected to the top of the first shaft.

The beneficial effects of the present invention include:

1. The present invention is a sewage treatment device. By arranging the first shaft and the second shaft forming the communication device, the water body in the second shaft can pass through the filter layer composed of the suspended filter material under the action of the head pressure, which can prevent the overflow. Filtration of flowing sewage;

2. The present invention also includes a backwash pump and an aeration pipe, which can backwash the filter layer to ensure the filtering efficiency and filtering effect of the filter layer;

3. A confluent sewage discharge system of the present invention, by connecting a plurality of sewage treatment devices on the confluent pipeline, expands the sewage treatment capacity of the confluent pipeline, especially the sewage overflow formed by the confluent pipeline can be filtered. The filtered overflow sewage is then discharged into the river, reducing the negative impact of the overflow sewage on the environment. On the other hand, the numerous treatment devices connected to the combined pipeline are simple in structure, easy to construct and configure, and can rapidly expand the sewage treatment capacity of the combined pipeline, which is conducive to solving the pollution problem of sewage overflowing from the combined pipeline in old urban areas.

Description of drawings

FIG. 1 is a schematic structural diagram of an optional embodiment of the combined sewage discharge system of the present invention.

In the figure: 1. The first shaft; 2. The second shaft; 3. Suspended filter material; 4. Partition net; 5. Water inlet pipe; 6. Water discharge pipe; 7. Connecting pipe; 8. Backwash pump; ; 10, water collection pipe; 11, aeration pipe; 12, overrun pipe; 13, interception well;

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a sewage treatment device includes a first vertical shaft 1 and a second vertical shaft 2; a communication pipe 7 is connected between the first vertical shaft 1 and the second vertical shaft 2, and the communication pipe 7 is arranged between the first vertical shaft 1 and the second vertical shaft 2. At the bottom of the second shaft 2, the first shaft 1 and the second shaft 2 are communicated with each other through a communication pipe 7, and the water flow in the first shaft 1 and the second shaft 2 passes through the communication pipe 7 between the first shaft 1 and the second shaft 2. flow between. Therefore, the first shaft 1 and the second shaft 2 form a communication device, and the sewage in the first shaft 1 will enter the second shaft 2 under the action of gravity.

The upper part of the first shaft 1 is connected with a water inlet pipe 5, and the second shaft 2 is connected with a water outlet pipe 6. The water in the second shaft 2 flows out of the second shaft 2 from the water outlet pipe 6, and the water outlet pipe 6 is arranged on the upper part of the second shaft 2. . The elevation of the axis of the communication pipe 7 is lower than the water inlet pipe 5 and the water outlet pipe 6, so that the water in the first vertical well 1 enters the second vertical well under the action of gravity head.

A filter layer is formed in the second shaft 2, the top surface of the filter layer is lower than the bottom elevation of the water outlet pipe 6, and the sewage entering the second shaft 2 passes through the filter layer from bottom to top under the action of the head pressure of the first shaft 1 , the suspended particles and N, P and other pollutants in the sewage are filtered and removed. The filtered water is then discharged into the river channel from the water outlet pipe 6 to reduce the pollution of the overflow sewage to the river channel.

Since the sewage in the first shaft 1 flows into the second shaft 2 under the action of gravity, in order to enable the water flow of the second shaft 2 to pass through the filter layer and flow out of the second shaft 2 through the water outlet pipe 6, it is necessary to ensure that the first shaft 1. It is necessary to ensure that the first shaft 1 and the second shaft 2 form a head difference, that is, the head pressure in the first shaft 1 is always greater than that in the second shaft 2, so the liquid level in the water inlet pipe 5 is always kept high. The height of the liquid level in the water outlet pipe 6 ensures that the sewage can flow out of the second vertical shaft 2 smoothly. Further, in order to ensure that the water flow in the first shaft 1 flows into the second shaft 2 smoothly, the liquid level in the water inlet pipe 5 is at least 30cm higher than the liquid level in the water outlet pipe 6, so that the water in the first shaft 1 is The water flow has sufficient head pressure to enter the second shaft 2 . Specifically, the bottom elevation of the water inlet pipe 5 can be made 30 cm higher than the top elevation of the water outlet pipe 6 .

Specifically, the filter layer is mainly composed of the suspension filter material 3, and a partition screen 4 is arranged on the top of the suspension filter material 3 to form a stable filter layer in the water, so as to prevent the suspension filter material 3 from running off due to the impact of water flow, resulting in a decrease in the filtering effect. Specifically, the suspension filter material 3 is made of a polymer foamed polyethylene material with a density of not more than 0.9 g/cm ³ , and the mesh of the partition screen 4 is not more than 2 cm in diameter.

A backwash pump 8 is also provided in the first shaft 1 . The backwash pump 8 has a water inlet and a water outlet, wherein a return pipe is connected to the water outlet of the backwash pump 8; In the shaft 1 and the second shaft 2, the backwash pump 8 sucks the water in the two shafts through the water collection pipe 10, that is to say, the backwash pump 8 sends the first shaft 1 and the second shaft 2 through the water collection pipe 10. The water is pumped into the second confluence pipe 16 .

Specifically, when the volume of filtered water in the second shaft 2 can satisfy the backwash pump 8 to work for at least 3 minutes, the backwash pump 8 can be started to flush the water in the first shaft 1 and the second shaft 2 due to the backwashing process. The latter polluted water is pumped into the second confluence pipeline 16 . The water in the second shaft 2, especially the filtered water located above the filter layer and filtered, flows through the suspension filter material 3 to flush the suspension filter material 3, and the turbidity of pollutants attached to the surface of the suspension filter material 3 is Under the action of water flow, the particles are peeled off from the suspended filter material 3, enter into the polluted water body below the filter layer, and are finally discharged from the first shaft 1 and the second shaft 2 by the backwash pump 8 through the return pipe. The flushing action of the filtered water above the filter layer realizes the cleaning of the suspension filter material 3 , which is beneficial to maintain the filtration efficiency of the suspension filter material 3 and prolong the service life of the suspension filter material 3 . On the other hand, during the backwashing process, since the filtered water flows in the direction of gravity, energy consumption is effectively reduced.

Further, in order to improve the effect of peeling off the turbid substances attached to the particles of the suspended filter material 3, an aeration pipe 11 is also arranged in the second shaft 2, and the aeration pipe 11 is arranged below the filter layer. The aeration pipe 11 is a pipe with one end closed, and the other end extends out of the second vertical shaft 2 and is connected to the blower 9 . When the backwash pump 8 is working, the blower 9 aerates the water in the filter layer synchronously through the aeration pipe 11 and the aeration plate. The particles of the filter material 3 form an impact, which accelerates the separation of the turbidity attached to the particles of the suspension filter material 3 and the particles of the suspension filter material 3, improves the cleaning efficiency and cleanliness of the suspension filter material 3, and allows more pollutants to enter the turbidity. in the body of water.

In order to ensure the cleaning effect of the filter layer, it should be ensured that the upper part of the filter layer has enough filtered water. The suction water volume and backwash strength are preferably 6 L/(s·m ² ) to 15 L/(s·m ² ).

Specifically, in order to reduce the overall volume of the sewage treatment device, the first vertical shaft 1 and the second vertical shaft 2 are provided with a common wall. In other embodiments, the first vertical shaft 1 and the second vertical shaft 2 may also be independent of each other, and the first vertical shaft 1 and the second vertical shaft 2 are communicated through a communication pipe 7 .

Specifically, in order to ensure the treatment efficiency and treatment effect of the sewage, the upward flow velocity of the water body in the second shaft 2 is set to be 8-16 m/h.

Further, an overrun pipe 12 is also connected to the top of the first shaft 1. When the sewage entering the first shaft 1 exceeds the designed treatment capacity of the sewage treatment device disclosed in this specification, the excess sewage is passed through the overrun pipe 12. Directly into the river to ensure the need for rapid drainage.

In the sewage treatment device disclosed in this specification, the first vertical shaft 1 can be communicated with a plurality of second vertical shafts 2, and the bottoms of the plurality of second vertical shafts 2 are connected with the bottom of the first vertical shaft 1 to form a communication device, thereby further increasing the sewage treatment device. Ability to treat overflow sewage.

Specifically, the first shaft 1 and the second shaft 2 are circular or square in shape, and are customized by engineering modularization or built on site.

It should be noted that the first confluence pipe 15 is located upstream of the second confluence pipe 16 , that is, the water flow pumped by the backwash pump 8 will no longer enter the first confluence pipe 15 , but will enter through the second confluence pipe 16 . into another sewage treatment plant described in this specification.

In other embodiments, the first confluence pipe 15 and the second confluence pipe 16 may also be independent of each other, and the water flow pumped by the backwash pump 8 will not enter the first confluence pipe 15 .

In other embodiments, the first shaft 1 and the second shaft 2 may be replaced with other types of pipes. The bottoms of the first pipe and the second pipe communicate with each other to form a communication connector. A water inlet pipe 5 is connected to the upper part of the first pipe, and a water outlet pipe 6 is connected to the second pipe. The bottom elevation of the water inlet pipe 5 is higher than the bottom elevation of the water outlet pipe 6 . A filter layer is arranged in the second pipeline. A water collection pipe 10 and an aeration pipe 11 are arranged at the lower part of the first pipe and the second pipe. The water collection pipe 10 is connected to the backwash pump 8 , and the aeration pipe 11 is connected to the blower 9 .

As shown in FIG. 1 , a confluence sewage discharge system includes a first confluence pipe 15 and a second confluence pipe 16 , and the second confluence pipe 16 is located downstream of the first confluence pipe 15 .

The first confluence pipe 15 is communicated with the water inlet pipe 5, a catch well 13 is arranged between the water feed pipe 5 and the first confluence pipe 15, the first confluence pipe 15 is communicated with the catch well 13, and the sewage in the first confluence pipe 15 The interception well 13 enters the first vertical well 1 through the water inlet pipe 5 , then enters the second vertical well 2 through the communication pipe 7 , flows through the filter layer and finally enters the river through the water outlet pipe 6 .

The interception well 13 is also provided with an overflow weir or overflow plate. When the water level in the interception well 13 exceeds the overflow weir or the top of the overflow plate, it enters the first vertical well 1 through the water inlet pipe 5 to allow the water flow to enter. The first vertical shaft 1 is relatively gentle so as to prevent the water flow in the first confluence pipe 15 from directly entering the first vertical shaft 1 and causing an impact on the first vertical shaft 1 .

A trash net 14 is also provided at the connection between the water inlet pipe 5 and the interception well 13 to avoid blocking the water inlet pipe 5 or the first vertical shaft 1 and the second vertical shaft 2 from being blocked by a large volume of solids.

The height of the liquid level in the interception well 13 is always greater than that of the water inlet pipe 6 to ensure sufficient head pressure so that the sewage is discharged through the water outlet pipe 6 after passing through the filter layer.

A plurality of sewage treatment devices described in this specification can be connected to the first confluence pipeline 15, so as to further improve the treatment capacity of the overflowed confluent sewage.

The second confluence pipe 16 is communicated with the return pipe on the backwash pump 8, and the backwash pump 8 discharges the polluted water in the first vertical well 1 and the second vertical well 2 into the second confluence pipe 16 through the return pipe. The second confluence pipe 16 enters the sewage treatment facility or the sewage treatment device described in this specification connected to the second confluence pipe 16 .

The above related descriptions and descriptions of the embodiments are for the convenience of those of ordinary skill in the technical field to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these contents, and the general principles described herein can be applied to other embodiments without inventive step. The present invention is not limited to the above related descriptions and descriptions of the embodiments. Those skilled in the art can make improvements and modifications without departing from the scope of the present invention based on the disclosure of the present invention, which should fall within the protection scope of the present invention.

Claims (14)

1. The utility model provides a sewage treatment device, includes first pipeline and second pipeline, its characterized in that, first pipeline and second pipeline bottom intercommunication form the linker, be connected with the inlet tube on the first pipeline, be connected with the outlet pipe on the second pipeline, be formed with the filter layer in the second pipeline, the liquid level elevation in the inlet tube is higher than the liquid level in the outlet pipe all the time.

2. The sewage treatment apparatus according to claim 1, wherein: the liquid level in the water inlet pipe is at least 30cm higher than that in the water outlet pipe.

3. The sewage treatment apparatus according to claim 2, wherein: the first pipeline is a first shaft, the second pipeline is a second shaft, communicating pipes are arranged at the bottoms of the first shaft and the second shaft, and the first shaft and the second shaft are connected through the communicating pipes.

4. The sewage treatment apparatus of claim 3, wherein: the filter layer is composed of suspended filter materials, and a separation net is arranged at the top of the filter layer.

5. The sewage treatment apparatus of claim 4, wherein: the device also comprises a back washing pump; a water collecting pipe is arranged in the second vertical shaft and is arranged below the filter layer, the water collecting pipe is connected with a water inlet of a backwashing pump, and a water outlet of the backwashing pump is connected with a return pipe.

6. The sewage treatment apparatus of claim 5, wherein: the device also comprises a blower; an aeration pipe is arranged in the second vertical shaft, the aeration pipe is connected to an air blower, and the aeration pipe is arranged below the filter layer; a plurality of aeration discs are uniformly arranged on the aeration pipe.

7. The sewage treatment apparatus of claim 6, wherein: the density of the suspension filter material is not more than 0.9g/cm³The mesh diameter of the separation net is not more than 2 cm.

8. The sewage treatment apparatus of claim 7, wherein: the back washing strength of the back washing pump is 6L/(s.m)²)～15L/(s·m²)。

9. The sewage treatment apparatus of claim 8, wherein: the ascending velocity of the water in the second shaft is set to be 8-16 m/h.

10. The sewage treatment apparatus of claim 3, wherein: the first shaft and the second shaft are arranged in a common wall.

11. The sewage treatment apparatus of claim 10, wherein: the top of the first vertical shaft is connected with an overrunning pipe.

12. A combined flow sewage discharge system comprising a first combined flow pipe communicating with the water inlet pipe of the sewage treatment apparatus according to any one of claims 1 to 11 and a second combined flow pipe communicating with the water outlet of the backwash pump through a return pipe.

13. A combined sewage discharge system according to claim 12 wherein: be provided with the vatch basin on the first confluence pipeline, the inlet tube with the vatch basin intercommunication, the inlet tube with vatch basin intercommunication department is provided with the trash screen.

14. A combined sewage drainage system according to claim 13, wherein: and an overflow weir or an overflow plate is arranged in the intercepting well.

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