Integrated village and town sewage treatment equipment

Abstract

The invention discloses integrated village and town sewage treatment equipment which comprises two biochemical pools and a settling pond, the two biochemical pools are in butt joint side by side, a water inlet flow guide channel is arranged between the biochemical pools and the settling pond, and the biochemical pools and the settling pond are communicated through the water inlet flow guide channel; the biochemical tank comprises an anaerobic tank, a first-section anoxic tank, a first-section aerobic tank, a second-section anoxic tank and a second-section aerobic tank or an extension process thereof, such as a second-section process and a bumping process, the anaerobic tank is communicated with the first-section anoxic tank, the first-section anoxic tank is communicated with the first-section aerobic tank, the first-section aerobic tank is communicated with the second-section anoxic tank, and the second-section aerobic tank is communicated with the second-section aerobic tank. And the second-section anoxic tank is communicated with the second-section aerobic tank. According to the invention, the biochemical pool enters the settling zone and adopts a water inlet diversion channel mode, so that the problem of non-uniform water inlet is solved, the water inlet mode of the secondary settling tank is changed, the pond shape of the settling tank is more flexible, the load of the settling tank is lower, the treatment effect is better, the arrangement of the biochemical pool is more flexible, and the distribution of retention time is more flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an integrated rural sewage treatment device. Background Art

[0002] Rural sewage is characterized by dispersion and regionality, mainly manifested as scattered discharge points, large fluctuations in water quality and quantity, etc.

[0003] In the existing integrated sewage treatment equipment, the end of the biochemical system enters the secondary sedimentation tank through pipelines, and the sedimentation form is a vertical flow sedimentation tank, which requires the sedimentation tank to be circular or square in shape. During the production and manufacturing of the equipment, the treatment capacity of the integrated equipment is restricted. When the sedimentation tank exceeds 3 meters, it needs to be grouped or it is difficult to implement the integrated equipment. The aerobic, anaerobic, anoxic and other different treatment sections of the biochemical tank are arranged in series in a streamline shape. This type of biochemical tank is prone to short-circuiting, and the return sludge pipeline is relatively long.

[0004] Therefore, an integrated rural sewage treatment device is proposed. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides an integrated rural sewage treatment device, which reduces short-circuiting, increases the reaction time, and the flexible adjustment of the sedimentation area is beneficial to increasing the sedimentation effect. At the same time, when adding a phosphorus removal agent for chemical phosphorus removal, the reaction time between the phosphorus removal agent and phosphate can be extended to ensure the phosphorus removal effect.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An integrated rural sewage treatment device proposed by the present invention includes a biochemical tank and a sedimentation tank. The biochemical tank has two butt joints side by side. An inlet diversion channel is provided between the biochemical tank and the sedimentation tank, and the biochemical tank and the sedimentation tank are connected through the inlet diversion channel;

[0008] The biochemical tank includes an anaerobic tank, a first-stage anoxic tank, a first-stage aerobic tank, a second-stage anoxic tank and a second-stage aerobic tank. The anaerobic tank is connected to the first-stage anoxic tank, the first-stage anoxic tank is connected to the first-stage aerobic tank, the first-stage aerobic tank is connected to the second-stage anoxic tank, the second-stage anoxic tank is connected to the second-stage aerobic tank, and the second-stage aerobic tank is connected to the inlet diversion channel;

[0009] The anaerobic tank has an inlet end. A sludge return pipe is connected between the sedimentation tank and the biochemical tank to realize sludge return, and a nitrification liquid return pipe is provided between the first-stage anoxic tank and the first-stage aerobic tank to realize nitrification liquid return.

[0010] Furthermore, it further includes a phosphorus removal mixing tank. A stirrer is installed in the phosphorus removal mixing tank. The second-stage aerobic tank is connected to the phosphorus removal mixing tank, and the second-stage aerobic tank is connected to the inlet diversion channel through the phosphorus removal mixing tank.

[0011] Further, a partition board is provided in the middle of the water inlet diversion channel. The bottom of the partition board is fixed to the inner bottom of the water inlet diversion channel. The part where the water inlet diversion channel is docked with the biochemical pool shares a pool wall, and the bottom of the pool wall is in a suspended state. The top of the partition board is on the same horizontal line as the bottom of the pool wall.

[0012] Further, four inclined plates are installed in the middle of the biochemical pool. The four inclined plates are connected end to end in sequence to form a funnel shape.

[0013] Further, both the sludge reflux and the sludge return adopt the air-lift method.

[0014] Further, the phosphorus removal mixing pool is arranged in one of the second-stage aerobic pool or the water inlet diversion channel.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In the present invention, the water enters the sedimentation area through the biochemical pool by means of the water inlet diversion channel, which solves the problem of uneven water inlet. By changing the water inlet mode of the secondary sedimentation tank, the pool shape of the sedimentation tank can be set more flexibly, the load of the sedimentation tank is lower, the treatment effect is better, the layout of the biochemical pool is more flexible, and the distribution of the residence time is more flexible. According to the different influent water qualities, the time distribution of each section of the biochemical pool can be adjusted to reduce the probability of short circuit, increase the actual residence time, reduce short circuit and increase the reaction duration. The flexible adjustment of the sedimentation area is beneficial to increasing the sedimentation effect. At the same time, when a phosphorus removal agent is added for chemical phosphorus removal, the reaction time between the phosphorus removal agent and phosphate can be prolonged to ensure the phosphorus removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall top view of the present invention;

[0018] Figure 2 is Figure 1 the sectional view taken along the line I-I in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention provides an integrated rural sewage treatment device, including a biochemical pool 1 and a sedimentation tank 2. The biochemical pool 1 has two arranged side by side and docked. An inlet diversion channel 3 is provided between the biochemical pool 1 and the sedimentation tank 2, and the biochemical pool 1 and the sedimentation tank 2 are communicated through the inlet diversion channel 3. The water enters the sedimentation area through the inlet diversion channel 3 in the biochemical pool. See attachedFigure 1-2 to solve the problem of uneven water inlet. After adopting the water inlet diversion channel 3, the shape of the sedimentation tank 2 can be square or rectangular, and there are many setting forms in the layout of the tank shape. By changing the water inlet mode of the sedimentation tank 2, the shape setting of the sedimentation tank 2 is more flexible, the load of the sedimentation tank 2 is lower, and the treatment effect is better;

[0021] The biochemical tank 1 includes an anaerobic tank 6, a first anoxic tank 7, a first aerobic tank 8, a second anoxic tank 9 and a second aerobic tank 10. The anaerobic tank 6 is connected to the first anoxic tank 7, the first anoxic tank 7 is connected to the first aerobic tank 8, the first aerobic tank 8 is connected to the second anoxic tank 9, the second anoxic tank 9 is connected to the second aerobic tank 10, and the second aerobic tank 10 is connected to the water inlet diversion channel 3. The different treatment sections such as aerobic, anaerobic and anoxic in the biochemical tank are adjusted from a streamlined series arrangement to a parallel and series arrangement. Among them, the anaerobic section is adjacent to the water inlet diversion channel. The layout of the biochemical tank is more flexible, and the distribution of the residence time is more flexible. It can adjust the time distribution of each section of the biochemical tank according to the different influent water quality, reduce the probability of short circuit flow, and increase the actual residence time;

[0022] Four inclined plates 12 are installed in the middle of the biochemical tank 1, and the four inclined plates 12 are connected end to end in sequence to form a funnel shape.

[0023] The anaerobic tank 6 has a water inlet end. A sludge return pipe 5 is connected between the sedimentation tank 2 and the biochemical tank 1 to realize sludge return. There is a nitrification liquid return pipe between the first anoxic tank 7 and the first aerobic tank 8 to realize nitrification liquid return. The nitrification liquid sludge return both adopts the air-lift method to reduce the length of the sludge return pipeline.

[0024] There is a partition plate 14 in the middle of the water inlet diversion channel 3. The bottom of the partition plate 14 is fixed to the inner bottom of the water inlet diversion channel 3. The part where the water inlet diversion channel 3 is docked with the biochemical tank 1 shares a pool wall 14. The bottom of the pool wall 14 is in a suspended state. The top of the partition plate 14 and the bottom of the pool wall 14 are on the same horizontal line. The liquid entering the water inlet diversion channel 3 needs to cross the partition plate 14 first and then enter the biochemical tank 1.

[0025] In the above, the water passing mode from the anaerobic section to the first anoxic section adopts an upper-end square or circular submerged water passing hole; the water passing mode from the first anoxic section to the first aerobic section adopts a bottom-end square or circular submerged water passing hole; the water passing mode from the first aerobic section to the second anoxic section adopts an upper-end square or circular submerged water passing hole; the water passing mode from the second anoxic section to the second aerobic section adopts a bottom-end square or circular submerged water passing hole; the water passing mode from the second aerobic section to the phosphorus removal mixing zone adopts an upper-end square submerged water passing hole; the flow velocity of each section of the water passing hole is 0.05 - 0.15 m / , and the number of water passing holes is determined by calculation.

[0026] In addition, a partition plate is added between the second anoxic tank 9 and the second aerobic tank 10, and an aeration head can be added to the second anoxic tank 10, which can be set according to the actual water quality situation, so that the second anoxic section can be converted into aerobic use.

[0027] In addition, in the prior art, synchronous phosphorus removal is adopted for phosphorus removal, and a phosphorus removal agent is directly added at the front end of the aerobic tank or the sedimentation tank. However, for chemical phosphorus removal, orthophosphate and the phosphorus removal agent need to be fully mixed, and sufficient reaction time is required after mixing. There are problems such as insufficient mixing and incomplete reaction when directly adding the phosphorus removal agent at the front end of the aerobic tank or the sedimentation tank. Therefore, the present invention makes improvements as follows:

[0028] A phosphorus removal mixing tank 11 is provided in the second-stage aerobic tank 10. The phosphorus removal mixing tank 11 can also be arranged in the influent diversion channel 3. A stirrer 13 is installed in the phosphorus removal mixing tank 11, and air stirring can also be used. The second-stage aerobic tank 10 is communicated with the phosphorus removal mixing tank 11, and the second-stage aerobic tank 10 is communicated with the influent diversion channel 3 through the phosphorus removal mixing tank 11. By adding a phosphorus removal mixing device at the end of the aerobic tank and adopting mechanical mixing, when adding a phosphorus removal agent for chemical phosphorus removal, the reaction time between the phosphorus removal agent and phosphate can be extended, ensuring the phosphorus removal effect.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated village sewage treatment equipment, comprising a biochemical tank (1) and a sedimentation tank (2), characterized in that: The biochemical pool (1) has two parallel butt joints, a water inlet diversion channel (3) is provided between the biochemical pool (1) and the sedimentation pool (2), and the biochemical pool (1) and the sedimentation pool (2) are connected via the water inlet diversion channel (3); The biochemical pool (1) comprises an anaerobic pool (6), a first anoxic pool (7), a first aerobic pool (8), a second anoxic pool (9) and a second aerobic pool (10), wherein the anaerobic pool (6) is connected to the first anoxic pool (7), the first anoxic pool (7) is connected to the first aerobic pool (8), the first aerobic pool (8) is connected to the second anoxic pool (9), the second anoxic pool (9) is connected to the second aerobic pool (10), and the second aerobic pool (10) is connected to the water inlet diversion channel (3); The anaerobic tank (6) has a water inlet end, a sludge return pipe (5) is connected between the sedimentation tank (2) and the biochemical tank (1) to achieve sludge return, and a nitrification liquid return pipe is provided between the anoxic tank (7) and the aerobic tank (8) to achieve nitrification liquid return.

2. The integrated village sewage treatment equipment according to claim 1 is characterized in that: It also comprises a dephosphorization mixing tank (11), in which a stirrer (13) is installed, the second-stage aerobic tank (10) is connected to the dephosphorization mixing tank (11), and the second-stage aerobic tank (10) is connected to the water inlet diversion channel (3) through the dephosphorization mixing tank (11).

3. The integrated village sewage treatment equipment according to claim 1 is characterized in that: The middle part of the water inlet diversion channel (3) is provided with a partition (14), the bottom of the partition (14) is fixed to the inner bottom of the water inlet diversion channel (3), the water inlet diversion channel (3) and the docking part of the biochemical pool (1) share a pool wall (15), the bottom of the pool wall (15) is suspended, and the top of the partition (14) and the bottom of the pool wall (15) are on the same horizontal line.

4. The integrated village sewage treatment equipment according to claim 1 is characterized in that: Four inclined plates (12) are installed in the middle of the biochemical pool (1), and the four inclined plates (12) are connected end to end in sequence to form a funnel shape.

5. The integrated village sewage treatment equipment according to claim 1 is characterized in that: The sludge return and sludge return are both carried out by air stripping.

6. The integrated village sewage treatment equipment according to claim 2 is characterized by: The dephosphorization mixing tank (11) is arranged in one of the second-stage aerobic tank (10) and the water inlet diversion channel (3).

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