Sewage treatment device

Abstract

The utility model discloses a sewage treatment device. The sewage treatment device comprises a water inlet part, an anaerobic tank, an anoxic tank, an aerobic tank and a water outlet part, sewage flows into the water inlet part; the anaerobic tank is communicated with the water inlet part, and the anaerobic tank is provided with a plurality of anaerobic treatment areas which are communicated in sequence; the anoxic tank is positioned at the downstream of the anaerobic tank and is communicated with the anaerobic tank, and the anoxic tank is provided with a plurality of anoxic treatment areas which are arranged in sequence; the aerobic tank is positioned at the downstream of the anoxic tank and is communicated with the anoxic tank, and the aerobic tank is provided with a plurality of aerobic treatment areas which are communicated in sequence; the water outlet part is communicated with the aerobic tank and is used for discharging the treated sewage. The sewage treatment device can prolong the retention time of sewage in the treatment tank and improve the sewage treatment effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection equipment, and specifically relates to a sewage treatment device. Background Art

[0002] A 2 The O sewage process (anaerobic-anoxic-aerobic process) plays an irreplaceable role in the field of sewage treatment, especially in the treatment of nitrogen removal and phosphorus removal wastewater. Existing nitrogen removal and phosphorus removal processes usually use anaerobic tanks, anoxic tanks and aerobic tanks to treat sewage, and the layout of the three sewage treatment tanks is diverse. However, the existing sewage treatment tanks have the following problems: on the one hand, the sewage tank is prone to short-flow or dead corners, which shortens the anaerobic residence time and leads to a decrease in treatment effect; on the other hand, the sludge concentration in the tank cannot be maintained, and sludge loss is prone to occur; in addition, the return volume and dissolved oxygen content cannot be accurately controlled, resulting in unstable nitrogen removal and phosphorus removal effects.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The utility model aims to provide a sewage treatment device, which can increase the residence time of sewage in a treatment tank and improve the sewage treatment effect.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a sewage treatment device, which includes: an inlet, an anaerobic tank, an anoxic tank, an aerobic tank and an outlet. The inlet is for sewage to flow in; the anaerobic tank is connected to the inlet, and the anaerobic tank has a plurality of anaerobic treatment zones connected in sequence; the anoxic tank is located downstream of the anaerobic tank and connected to the anaerobic tank, and the anoxic tank has a plurality of anoxic treatment zones arranged in sequence; the aerobic tank is located downstream of the anoxic tank and connected to the anoxic tank, and the aerobic tank has a plurality of aerobic treatment zones connected in sequence; the outlet is connected to the aerobic tank for discharging the treated sewage.

[0006] In one or more embodiments of the present invention, the anaerobic tank includes a plurality of first stop walls, which separate the anaerobic tank into the plurality of anaerobic treatment zones, and the plurality of first stop walls are configured to allow sewage to flow through the plurality of anaerobic treatment zones in an "S" shape.

[0007] In one or more embodiments of the present invention, the anoxic tank is connected to the most downstream anaerobic treatment zone, and the anoxic tank includes a second stop wall, which extends along the width direction of the anoxic tank and has a gap between one end away from the most downstream anaerobic treatment zone and the side wall of the anoxic tank.

[0008] In one or more embodiments of the present invention, the aerobic pool includes a plurality of partition walls extending along the length direction of the aerobic pool, dividing the aerobic pool into the plurality of aerobic treatment zones parallel to each other, and the sewage in adjacent and connected aerobic treatment zones flows in opposite directions.

[0009] In one or more embodiments of the utility model, the aerobic pool includes: a first aerobic treatment zone, a second aerobic treatment zone, a third aerobic treatment zone and a fourth aerobic treatment zone. The first aerobic treatment zone is connected to the anoxic pool; the second aerobic treatment zone is arranged on one side of the first aerobic treatment zone; the third aerobic treatment zone is arranged on the side of the second aerobic treatment zone away from the first aerobic treatment zone; the fourth aerobic treatment zone is arranged on the other side of the first aerobic treatment zone; wherein the ends of the adjacent connected aerobic treatment zones are provided with arc-shaped stop walls, and the arc-shaped stop walls are connected to the partition wall and are configured so that the sewage of the adjacent connected aerobic treatment zones flows in opposite directions.

[0010] In one or more embodiments of the present invention, a plurality of microporous aeration pipelines are arranged at intervals along the flow direction of the sewage in each aerobic treatment zone to supply oxygen to the aerobic pool.

[0011] In one or more embodiments of the present invention, a submersible mixer is disposed at the bottom of each aerobic treatment zone, and the submersible mixer is disposed between two adjacent microporous aeration pipelines.

[0012] In one or more embodiments of the present invention, a submersible mixer is provided in each of the anaerobic treatment zones; and / or a submersible mixer is provided in each of the anoxic treatment zones.

[0013] In one or more embodiments of the present invention, a nitrification liquid channel is provided between the anoxic tank and the aerobic tank for connecting the anoxic tank and the aerobic tank; one end of the nitrification liquid channel is provided on a side of the anoxic tank close to the anaerobic tank, and a regulating valve is provided on the other end thereof and is located on a side of the aerobic tank close to the water outlet, for controlling the nitrification liquid in the aerobic tank to enter the anoxic tank.

[0014] In one or more embodiments of the utility model, a sludge return assembly is provided between the aerobic tank and the water inlet, and the sludge return assembly includes: a sludge return pipe and a sludge return pump. One end of the sludge return pipe is provided on one side of the aerobic tank close to the water outlet, and the other end is provided on the water inlet, connecting the aerobic tank with the water inlet; the sludge return pump is provided on one end of the sludge return pipe located in the aerobic tank, and is used to pump the sludge in the aerobic tank to the water inlet.

[0015] Compared with the prior art, the anaerobic tank, anoxic tank and aerobic tank of the sewage treatment device of the utility model are divided into multiple treatment areas, so that the residence time of sewage in the anaerobic tank, anoxic tank and aerobic tank is increased, and the treatment effect is improved. A submersible mixer 8 is provided in the anaerobic tank, anoxic tank and aerobic tank, which can fully mix the sewage and the treatment liquid to improve the sewage treatment effect. A nitrification liquid channel is provided between the anoxic tank and the aerobic tank, which can improve the utilization rate of the nitrification liquid. In addition, a microporous aeration pipeline 7 is provided in the aerobic tank to accurately control the oxygen dissolution amount in the aerobic tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of a sewage treatment device in one embodiment of the utility model.

[0018] Description of main reference numerals:

[0019] 1-water inlet, 11-water inlet pipe, 12-water inlet trough, 2-anaerobic tank, 21-anaerobic treatment zone, 22-first stop wall; 3-anoxic tank, 31-anoxic treatment zone, 32-second stop wall, 4-aerobic tank, 41-aerobic treatment zone, 411-first aerobic treatment zone, 412-second aerobic treatment zone, 413-third aerobic treatment zone, 414-fourth aerobic treatment zone, 42-partition wall, 43-arc stop wall, 5-water outlet, 51-water outlet trough, 52-water outlet pipe, 6-sludge return assembly, 61-sludge return pipe, 62-sludge return pump, 7-microporous aeration pipeline, 8-submersible mixer, 9-nitrification liquid channel. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] like Figure 1 As shown, a sewage treatment device in one embodiment of the utility model comprises: an inlet 1, an anaerobic tank 2, an anoxic tank 3, an aerobic tank 4 and an outlet 5. The inlet 1 is for sewage to flow in. The anaerobic tank 2 is connected to the inlet 1, and the anaerobic tank 2 has a plurality of anaerobic treatment zones 21 connected in sequence. The anoxic tank 3 is located downstream of the anaerobic tank 2 and is connected to the anaerobic tank 2, and the anoxic tank 3 has a plurality of anoxic treatment zones 31 connected in sequence. The aerobic tank 4 is located downstream of the anoxic tank 3 and is connected to the anoxic tank 3, and the aerobic tank 4 has a plurality of aerobic treatment zones 41 connected in sequence, and the sewage flows through the plurality of aerobic treatment zones 41 in sequence. The outlet 5 is connected to the aerobic tank 4 to discharge the treated sewage, for example, it can be discharged to a subsequent treatment device.

[0022] The anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 in the prior art are usually three independent sewage treatment tanks, and the three sewage treatment tanks are connected in sequence. When sewage flows in the treatment tank without obstruction, the flow speed will be relatively fast, and the residence time in the sewage treatment tank is relatively short, which is prone to short flow or dead corners, thereby reducing the treatment effect.

[0023] According to the utility model in the above embodiment, the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 of the sewage treatment device are all provided with multiple treatment zones. The treatment zones divide the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 into multiple intervals, so that the residence time of the sewage in the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 is increased, and the treatment effect is improved.

[0024] The anaerobic tank 2 is used to remove phosphorus and some organic matter contained in the sewage. In order to improve the treatment effect of the anaerobic tank 2 on the sewage, the anaerobic tank 2 includes a plurality of first stop walls 22, which divide the anaerobic tank into a plurality of anaerobic treatment zones 21, and the plurality of first stop walls 22 are configured so that the sewage flows through the plurality of anaerobic treatment zones 22 in an "S" shape, thereby increasing the residence time of the sewage in the anaerobic tank 2 and preventing short-flow.

[0025] A submersible mixer 8 is provided in each anaerobic treatment zone 21 of the anaerobic tank 2, which is used to fully mix the sewage with the treatment liquid in the treatment tank and prevent the sludge in the sewage from settling. In one embodiment, the anaerobic tank 2 may be provided with three anaerobic treatment zones 21 connected in sequence, and the third anaerobic treatment zone 21 is connected to the anoxic tank 3. A submersible mixer 8 is provided in each anaerobic treatment zone 21.

[0026] The sewage treated by the anaerobic tank 2 will continue to flow into the anoxic tank 3, and the anoxic tank 3 will further treat some organic matter and ammonia nitrogen in the sewage. The anoxic tank 3 is connected to the most downstream anaerobic treatment zone 31, and the anoxic tank 3 includes a second stop wall 32, which extends along the width direction of the anoxic tank 3 and has a gap between the end away from the most downstream anaerobic treatment zone 31 and the side wall of the anoxic tank 3, which is used to connect the anaerobic treatment zone and increase the flow time of the sewage.

[0027] Preferably, the anoxic pool 3 is provided with two connected anoxic treatment areas 31. Each anoxic treatment area 31 is provided with a submersible mixer 8 for improving the treatment effect of organic matter and ammonia nitrogen.

[0028] After the anaerobic treatment, the sewage will be discharged into the aerobic tank 4, which is used to treat the remaining organic matter in the sewage. In one embodiment, the aerobic tank 4 has a plurality of aerobic treatment zones 41 connected in sequence. The aerobic tank 4 includes a plurality of partition walls 42 extending along the length direction of the aerobic tank 4, which divide the aerobic tank 4 into the plurality of aerobic treatment zones 41 parallel to each other, and the sewage in the adjacent connected aerobic treatment zones 41 flows in opposite directions.

[0029] Specifically, the aerobic pool 4 may include: a first aerobic treatment zone 411, a second aerobic treatment zone 412, a third aerobic treatment zone 413 and a fourth aerobic treatment zone 414. The first aerobic treatment zone 411 is connected to the anoxic pool 4. The second aerobic treatment zone 412 is arranged on one side of the first aerobic treatment zone 411. The third aerobic treatment zone 413 is arranged on the side of the second aerobic treatment zone 412 away from the first aerobic treatment zone 411. The fourth aerobic treatment zone 414 is arranged on the other side of the first aerobic treatment zone 411; wherein, the ends of the adjacent connected aerobic treatment zones 41 are provided with arc-shaped stop walls 43, and the arc-shaped stop walls 43 are connected to the partition wall 42 and are configured so that the sewage of the adjacent connected aerobic treatment zones 41 flows in opposite directions. The sewage can have a longer circulation distance and reaction time in the aerobic pool 4, thereby improving the treatment effect of the sewage.

[0030] Since the aerobic pool 4 needs to rely on oxygen to treat the sewage, a plurality of microporous aeration pipes 7 are arranged at intervals along the flow direction of the sewage in each aerobic treatment zone 41, which are used to oxygenate the aerobic pool 4 for treating the sewage. The arrangement of the microporous aeration pipes 7 can accurately control the amount of dissolved oxygen in the aerobic pool 4, thereby further improving the sewage treatment effect. Furthermore, in order to improve the treatment efficiency of organic matter, a submersible mixer 8 is arranged at the bottom of each aerobic treatment zone 41, and the submersible mixer 8 is arranged between the intervals of the microporous aeration pipes 7, so as to fully mix the sewage with the treatment liquid.

[0031] The anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 treat sewage through different microorganisms or bacterial communities contained in the sludge in the tanks, so the concentration of the sludge is crucial to maintaining the treatment efficiency and stability of the system. In order to maintain the sludge concentration and avoid sludge loss, a sludge return component 6 is provided between the aerobic tank 4 and the water inlet 1, which is used to transport the sludge in the aerobic tank 4 to the water inlet 1, so that the sludge enters the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 from the water inlet 1 to maintain the sludge concentration.

[0032] Specifically, the sludge return assembly 6 includes: a sludge return pipe 61 and a sludge return pump 62. One end of the sludge return pipe 61 is arranged on the side of the aerobic tank 4 close to the water outlet 5, and the other end is arranged on the water inlet 1, so as to connect the aerobic tank 4 with the water inlet 1. The sludge return pump 62 is arranged on the end of the sludge return pipe 61 located in the aerobic tank 4, and is used to pump the sludge in the aerobic tank 4 to the water inlet 1. One end of the sludge return pipe 61 is arranged on the side of the aerobic tank 4 close to the water outlet 5, so that the sludge flowing from the anaerobic tank 2 to the aerobic tank 4 can be pumped back to the water inlet 1, and the sewage treatment effect will not be affected by pumping the sludge in advance.

[0033] A nitrification liquid channel 9 is provided between the anoxic pool 3 and the aerobic pool 4, for connecting the anoxic pool 3 and the aerobic pool 4. The nitrification liquid channel 9 is used to control the nitrification liquid in the aerobic pool 4 to enter the anoxic pool 3. One end of the nitrification liquid channel 9 is provided on the side of the anoxic pool 3 close to the anaerobic pool 2, and the other end thereof is provided with a regulating valve and is located on the side of the aerobic pool 4 close to the water outlet 5. Specifically, one end of the nitrification liquid channel 9 is provided in the first anoxic treatment area 31 in the anoxic pool 3, and the other end is provided in the last aerobic treatment area 41 of the aerobic pool 4. Such a setting can ensure, on the one hand, that the nitrification liquid has the longest flow distance in the anoxic pool 3 and the aerobic pool 4, and the most complete reaction; on the other hand, when the nitrification liquid in the anoxic pool 3 is insufficient, the nitrification liquid in the aerobic pool 4 can flow back to the anoxic pool 3, thereby further improving the utilization rate of the nitrification liquid.

[0034] In one embodiment, the water inlet 1 includes an inlet pipe 11 and an inlet trough 12 connected to the inlet pipe 11. The inlet trough 12 is connected to the anaerobic tank 2 and is used to distribute sewage to prevent the sewage from pouring into the anaerobic tank 2 too quickly and affecting the sewage treatment effect. The water outlet 5 includes an outlet trough 51 and an outlet pipe 52 connected to the outlet trough 51. The outlet trough 51 is connected to the aerobic tank 4 and is used to transport the treated sewage from the outlet pipe 52 to other treatment devices. The outlet trough 51 can play a role in temporarily storing sewage and buffering to prevent the sewage from pouring into other treatment devices too quickly.

[0035] In summary, the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 of the sewage treatment device of the utility model are divided into a plurality of treatment areas, so that the residence time of the sewage in the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 is increased, and the treatment effect is improved. The anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 are all provided with a submersible mixer 8, which can make the sewage and the treatment liquid fully mixed, and improve the sewage treatment effect. The nitrification liquid channel 9 is provided between the anoxic tank 3 and the aerobic tank 4, which can improve the utilization rate of the nitrification liquid. In addition, the microporous aeration pipeline 7 is provided in the aerobic tank 4 to accurately control the oxygen dissolution amount of the aerobic tank 4.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sewage treatment device, characterized in that: include: Water inlet, for sewage to flow in; An anaerobic tank is connected to the water inlet, and the anaerobic tank has a plurality of anaerobic treatment zones connected in sequence; an anoxic tank, located downstream of the anaerobic tank and connected to the anaerobic tank, wherein the anoxic tank has a plurality of anoxic treatment areas connected in sequence; an aerobic pool, located downstream of the anoxic pool and connected to the anoxic pool, wherein the aerobic pool has a plurality of aerobic treatment zones connected in sequence; and The water outlet is connected to the aerobic tank and is used to discharge the treated sewage.

2. The sewage treatment device according to claim 1, characterized in that: The anaerobic tank comprises a plurality of first stop walls, which divide the anaerobic tank into the plurality of anaerobic treatment zones, and the plurality of first stop walls are configured to allow sewage to flow through the plurality of anaerobic treatment zones in an "S" shape.

3. The sewage treatment device according to claim 1, characterized in that: The anoxic tank is connected to the most downstream anaerobic treatment zone and includes a second stop wall extending along the width direction of the anoxic tank and having a gap between one end of the second stop wall away from the most downstream anaerobic treatment zone and the side wall of the anoxic tank.

4. The sewage treatment device according to claim 1, characterized in that: The aerobic pool comprises a plurality of partition walls extending along the length direction of the aerobic pool, which divide the aerobic pool into a plurality of aerobic treatment zones parallel to each other, and the sewage in adjacent and connected aerobic treatment zones flows in opposite directions.

5. The sewage treatment device according to claim 4, characterized in that: The aerobic pool comprises: A first aerobic treatment zone, connected to the anoxic tank; A second aerobic treatment zone is disposed on one side of the first aerobic treatment zone; A third aerobic treatment zone is arranged on a side of the second aerobic treatment zone away from the first aerobic treatment zone; a fourth aerobic treatment zone, disposed on the other side of the first aerobic treatment zone; Wherein, an arc-shaped stop wall is arranged at the end of the adjacent connected aerobic treatment zones, and the arc-shaped stop wall is connected to the partition wall and is configured so that the sewage in the adjacent connected aerobic treatment zones flows in opposite directions.

6. The sewage treatment device according to claim 1, characterized in that: In each of the aerobic treatment zones, a plurality of microporous aeration pipelines are arranged at intervals along the flow direction of the sewage, for supplying oxygen to the aerobic pool.

7. The sewage treatment device according to claim 6, characterized in that: A submersible mixer is arranged at the bottom of each aerobic treatment zone, and the submersible mixer is arranged between two adjacent microporous aeration pipelines.

8. The sewage treatment device according to claim 1, characterized in that: A submersible mixer is provided in each of the anaerobic treatment zones; and / or a submersible mixer is provided in each of the anoxic treatment zones.

9. The sewage treatment device according to claim 1, characterized in that: A nitrification liquid channel is provided between the anoxic tank and the aerobic tank, for connecting the anoxic tank and the aerobic tank; one end of the nitrification liquid channel is provided on a side of the anoxic tank close to the anaerobic tank, and the other end thereof is provided with a regulating valve and is located on a side of the aerobic tank close to the water outlet, for controlling the nitrification liquid in the aerobic tank to enter the anoxic tank.

10. The sewage treatment device according to claim 1, characterized in that: A sludge return assembly is provided between the aerobic tank and the water inlet, and the sludge return assembly comprises: A sludge return pipe, one end of which is arranged at one side of the aerobic tank close to the water outlet, and the other end of which is arranged at the water inlet, connecting the aerobic tank with the water inlet; and A sludge return pump is arranged at one end of the sludge return pipe located in the aerobic tank, and is used to pump the sludge in the aerobic tank to the water inlet.

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