Sewage biochemical treatment device

Abstract

The utility model discloses a sewage biochemical treatment device. The sewage biochemical treatment device comprises a treatment tank, a water inlet pipe and a water outlet pipe, the treatment tank is divided into a sludge tank, an anaerobic tank, an aeration tank and a sedimentation tank, and the sludge tank is used for mixing sewage; the anaerobic tank is arranged on one side of the sludge tank, is communicated with the sludge tank and is used for dephosphorizing the sewage; the aeration tank is communicated with the anaerobic tank and is used for biochemical aerobic treatment of the sewage; the sedimentation tank is arranged on the other side of the sludge tank relative to the anaerobic tank, is communicated with the aeration tank through an overflow pipe and is used for mud-water separation; the water inlet pipe is arranged above the sludge tank and is used for conveying sewage to the sludge tank; the water outlet pipe is communicated with the sedimentation tank and is used for discharging supernatant liquid of the sedimentation tank; wherein the aeration tank is arranged around the sludge tank, the anaerobic tank and the sedimentation tank. The sewage biochemical treatment device can improve the sewage treatment effect and is smaller in occupied area.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to a sewage biochemical treatment device. Background Art

[0002] Biochemical treatment technology plays an important role in the field of sewage treatment, especially in the degradation of organic matter in wastewater and the removal of nitrogen and phosphorus. The existing biochemical treatment technology has a variety of treatment pool layouts, but the treatment pool occupies a relatively large area. In addition, the existing treatment pools are prone to short-flow or dead corners, which shorten the residence time and reduce the treatment effect; the sludge concentration cannot be maintained, and sludge loss is prone to occur; the return volume and dissolved oxygen content cannot be accurately controlled, resulting in unstable denitrification 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 biochemical treatment device, which can improve the sewage treatment effect and occupies a smaller area.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a sewage biochemical treatment device, which includes: a treatment tank, an inlet pipe and an outlet pipe. The treatment tank is divided into a sludge tank, an anaerobic tank, an aeration tank and a sedimentation tank. The sludge tank is used for mixing sewage; the anaerobic tank is arranged on one side of the sludge tank and is connected to the sludge tank, and is used for phosphorus removal of the sewage; the aeration tank is connected to the anaerobic tank, and is used for biochemical aerobic treatment of the sewage; the sedimentation tank is arranged on the other side of the sludge tank relative to the anaerobic tank, and is connected to the aeration tank through an overflow pipe, and is used for mud and water separation; the inlet pipe is arranged above the sludge tank, and is used for conveying sewage to the sludge tank; the outlet pipe is connected to the sedimentation tank, and is used for discharging the upper clear liquid of the sedimentation tank; wherein the aeration tank is arranged around the sludge tank, the anaerobic tank and the sedimentation tank.

[0006] In one or more embodiments of the present invention, an aeration main pipe is provided along the outer wall of the aeration tank, and the aeration main pipe extends along the outer wall of the aeration tank to form a rectangular pipeline for inputting oxygen into the aeration tank.

[0007] In one or more embodiments of the present invention, the aeration main pipe is provided with a plurality of microporous aeration pipes perpendicular to the aeration main pipe, and the microporous aeration pipes extend toward the inner wall of the aeration tank.

[0008] In one or more embodiments of the present utility model, a portion of the water inlet pipe located above the sludge pool is evenly provided with a plurality of water distribution holes along its length direction for uniform water discharge.

[0009] In one or more embodiments of the utility model, a sludge return assembly is provided between the sedimentation tank and the sludge tank, and the sludge return assembly includes: an air lift duct and a sludge return pipe. The air lift duct is used to inject compressed air into the sedimentation tank; one end of the sludge return pipe is provided in the sedimentation tank, and the other end is provided in the sludge tank, and is used to transport the sludge in the sedimentation tank to the sludge tank.

[0010] In one or more embodiments of the present invention, the anaerobic tank is provided with a plurality of submersible mixers.

[0011] In one or more embodiments of the present invention, two submersible mixers are provided, and the two submersible mixers are arranged along the diagonal of the anaerobic tank and are symmetrical with respect to the center of the intersection of the diagonal of the anaerobic tank.

[0012] In one or more embodiments of the present invention, the aeration tank is provided with a plurality of submersible mixers.

[0013] In one or more embodiments of the present invention, the submersible mixer is disposed on a side of the aeration tank away from the sedimentation tank, and a plurality of submersible mixers are symmetrically disposed along a symmetry axis in the length direction of the aeration tank.

[0014] In one or more embodiments of the present invention, the sludge tank, anaerobic tank, aeration tank and sedimentation tank are all rectangular treatment tanks; and / or, a guide tube is provided in the center of the sedimentation tank for mud and water separation.

[0015] Compared with the prior art, the treatment tank of the sewage biochemical treatment device of the utility model is divided into a sludge tank, an anaerobic tank, an aeration tank and a sedimentation tank, making the whole structure more compact and occupying a smaller area. The aeration tank is arranged around the sludge tank, the anaerobic tank and the sedimentation tank, the flow time of sewage in the aeration tank is increased, and the sewage treatment effect is better. The sludge tank can fully mix the sludge used for biochemical treatment with the sewage, and the sludge concentration is higher. In addition, the setting of the submersible mixer can prevent the sludge from being deposited in the treatment tank, thereby improving the sewage treatment effect. 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 biochemical treatment device in one embodiment of the utility model.

[0018] Description of main reference numerals:

[0019] 1-treatment tank, 11-sludge tank, 12-anaerobic tank, 13-aeration tank, 14-sedimentation tank, 141-overflow pipe, 142-guide tube, 2-water inlet pipe, 3-water outlet pipe, 4-aeration main pipe, 41-microporous aeration pipe, 5-sludge return assembly, 51-air lift duct, 52-sludge return pipe, 6-submersible mixer. 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 biochemical treatment device in one embodiment of the utility model comprises: a treatment tank 1, an inlet pipe 2 and an outlet pipe 3. The treatment tank 1 is divided into a sludge tank 11, an anaerobic tank 12, an aeration tank 13 and a sedimentation tank 14. The sludge tank 11 is used for mixing sewage. The anaerobic tank 12 is arranged on one side of the sludge tank 11 and is connected to the sludge tank 11 for phosphorus removal of sewage. The aeration tank 13 is connected to the anaerobic tank 12 for biochemical aerobic treatment of sewage. The sedimentation tank 14 is arranged on the other side of the sludge tank 11 relative to the anaerobic tank 12, and is connected to the aeration tank 13 through an overflow pipe 141 for mud and water separation. The inlet pipe 2 is arranged above the sludge tank 11 for conveying sewage to the sludge tank 11. The outlet pipe 3 is connected to the sedimentation tank 14 for discharging the upper clear liquid of the sedimentation tank 14. Among them, the aeration tank 13 is surrounded by the sludge tank 11, the anaerobic tank 12 and the sedimentation tank 14.

[0022] The treatment pools in the prior art are usually arranged in sequence, and the entire sewage treatment device occupies a large area, which is not a good use of space. In addition, the treatment pools arranged in sequence are prone to short flow, which causes the sewage to flow in the treatment pool for too short a time, thus affecting the effect of sewage treatment.

[0023] According to the above-mentioned embodiment of the utility model, the treatment tank 1 of the sewage biochemical treatment device is divided into a sludge tank 11, an anaerobic tank 12, an aeration tank 13 and a sedimentation tank 14, so that the whole structure is more compact and occupies a smaller area. The aeration tank 13 is arranged around the sludge tank 11, the anaerobic tank 12 and the sedimentation tank 14. The sewage needs to flow from the connection between the anaerobic tank 12 and the aeration tank 13 and then along the side walls of the sludge tank 11, the anaerobic tank 12 and the sedimentation tank 14 to the sedimentation tank 14, so that the flow time of the sewage in the aeration tank 13 is increased, and the sewage treatment effect is better. In addition, the sludge tank 11 can fully mix the sludge used for biochemical treatment with the sewage, and the sludge concentration is higher.

[0024] In one embodiment, the sludge pool 11 may be a rectangular pool. The portion of the water inlet pipe 2 located above the sludge pool 11 is evenly provided with a plurality of water distribution holes along its length direction for even water discharge, so that the sludge and sewage can be mixed more evenly.

[0025] After the sludge and sewage are evenly mixed in the sludge tank 11, they will be transported to the anaerobic tank 12. The anaerobic tank 12 is provided with a plurality of submersible mixers 6 to prevent the sludge and sewage from being excessively deposited in the anaerobic tank 12. In one embodiment, the anaerobic tank 12 may be a rectangular tank. Two submersible mixers 6 are provided, and the two submersible mixers 6 are arranged along the diagonal of the anaerobic tank 12 and are symmetrical relative to the center of the intersection of the diagonal of the anaerobic tank 12 to prevent the sludge from being deposited in the dead corner of the anaerobic tank 12 and affecting the effect of sewage treatment.

[0026] After the sewage is treated in the anaerobic tank 12, it is transported to the aeration tank 13 for biochemical aerobic treatment. Biochemical aerobic treatment requires a large amount of oxygen. In order to increase the oxygen content of the aeration tank 13. An aeration main pipe 4 is arranged along the outer wall of the aeration tank 13 for inputting oxygen into the aeration tank 13. The aeration main pipe 4 extends along the outer wall of the aeration tank 13 to form a rectangular pipeline to ensure that every part in the aeration tank 13 can have a sufficient oxygen concentration.

[0027] Furthermore, a plurality of microporous aeration tubes 41 are provided on the aeration main pipe 4 and are perpendicular to the aeration main pipe 4, and the microporous aeration tubes 41 extend toward the inner wall of the aeration tank 13. The microporous aeration tubes 41 can increase the contact points between the aeration main pipe 4 and the sewage, thereby increasing the dissolution rate of oxygen in the sewage and making it easier to control the oxygen content in the sewage.

[0028] In one embodiment, the aeration tank 13 may be a rectangular tank, which encloses the sludge tank 11, the anaerobic tank 12 and the sedimentation tank 14. The entire device is roughly in the shape of a "U" character, and two channels for sewage to flow are formed in the aeration tank 13, so that the sewage can have a longer flow distance in the aeration tank 13. In addition, in order to prevent sludge from being deposited in the aeration tank 13, the aeration tank 13 is provided with a plurality of submersible mixers 6. Further, the submersible mixers 6 are arranged on one side of the aeration tank 13 away from the sedimentation tank 14, and the plurality of submersible mixers 6 are symmetrically arranged along the symmetry axis in the length direction of the aeration tank 13.

[0029] The sewage treated by the aeration tank 13 will be mixed with sludge and enter the sedimentation tank 14. The sedimentation tank 14 is used to separate the sludge from the sewage, discharge the supernatant liquid not mixed with sludge, collect the sludge that can be reused and send it to the sludge area for reuse. The sedimentation tank 14 can also be a rectangular tank to match the structure of the aeration tank 13 and reduce the floor space of the entire sewage biochemical treatment device. A guide tube 142 is set in the center of the sedimentation tank 14 to separate the sludge from the supernatant liquid.

[0030] In order to recycle the sludge in the sedimentation tank 14, a sludge return assembly 5 is provided between the sedimentation tank 14 and the sludge tank 11. The sludge return assembly 5 includes: an air lift duct 51 and a sludge return pipe 52. The air lift duct 51 is used to inject compressed air into the sedimentation tank 14 to generate bubbles. These bubbles can increase buoyancy and help sludge or sediment to float up with the bubbles. One end of the sludge return pipe 52 is arranged in the sedimentation tank 14, and the other end is arranged in the sludge tank 11, so that the sludge or sediment floating out of the sedimentation tank 14 can be transported to the sludge tank 11 for reuse.

[0031] In summary, the treatment tank 1 of the sewage biochemical treatment device of the utility model is divided into a sludge tank 11, an anaerobic tank 12, an aeration tank 13 and a sedimentation tank 14, making the entire structure more compact and occupying a smaller area. The aeration tank 13 is arranged around the sludge tank 11, the anaerobic tank 12 and the sedimentation tank 14, and the flow time of the sewage in the aeration tank 13 is increased, and the sewage treatment effect is better. The sludge tank 11 can fully mix the sludge used for biochemical treatment with the sewage, and the sludge concentration is higher. In addition, the setting of the submersible mixer 6 can prevent the sludge from being deposited in the treatment tank 1, thereby improving the sewage treatment effect.

[0032] 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.

[0033] 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 biochemical treatment device, characterized in that: include: A treatment tank, which is divided into a sludge tank, an anaerobic tank, an aeration tank and a sedimentation tank, wherein the sludge tank is used for mixing sewage; the anaerobic tank is arranged at one side of the sludge tank and is connected to the sludge tank, and is used for phosphorus removal of the sewage; the aeration tank is connected to the anaerobic tank and is used for biochemical aerobic treatment of the sewage; the sedimentation tank is arranged at the other side of the sludge tank relative to the anaerobic tank, and is connected to the aeration tank through an overflow pipe, and is used for mud and water separation; A water inlet pipe is arranged above the sludge pool and is used to transport sewage to the sludge pool; as well as An outlet pipe, connected to the sedimentation tank, for discharging the supernatant liquid from the sedimentation tank; Wherein, the aeration tank is arranged around the sludge tank, the anaerobic tank and the sedimentation tank.

2. The sewage biochemical treatment device according to claim 1, characterized in that: An aeration main pipe is arranged along the outer wall of the aeration tank, and the aeration main pipe extends along the outer wall of the aeration tank to form a rectangular pipeline for inputting oxygen into the aeration tank.

3. The sewage biochemical treatment device according to claim 2, characterized in that: The aeration main pipe is provided with a plurality of microporous aeration pipes perpendicular to the aeration main pipe, and the microporous aeration pipes extend toward the inner wall of the aeration tank.

4. The sewage biochemical treatment device according to claim 1, characterized in that: The portion of the water inlet pipe located above the sludge pool is evenly provided with a plurality of water distribution holes along its length direction for even water discharge.

5. The sewage biochemical treatment device according to claim 1, characterized in that: A sludge return assembly is provided between the sedimentation tank and the sludge tank, and the sludge return assembly comprises: An air lift duct, used to inject compressed air into the sedimentation tank; and A sludge return pipe, one end of which is arranged in the sedimentation tank, and the other end of which is arranged in the sludge tank, is used to transport the sludge in the sedimentation tank to the sludge tank.

6. The sewage biochemical treatment device according to claim 1, characterized in that: The anaerobic tank is provided with a plurality of submersible mixers.

7. The sewage biochemical treatment device according to claim 6, characterized in that: The submersible mixers are provided with two, and the two submersible mixers are arranged along the diagonal lines of the anaerobic tank and are symmetrical with respect to the center of the intersection of the diagonal lines of the anaerobic tank.

8. The sewage biochemical treatment device according to claim 1, characterized in that: The aeration tank is provided with a plurality of submersible mixers.

9. The sewage biochemical treatment device according to claim 8, characterized in that: The submersible mixer is arranged at a side of the aeration tank away from the sedimentation tank, and a plurality of submersible mixers are symmetrically arranged along a symmetry axis in the length direction of the aeration tank.

10. The sewage biochemical treatment device according to claim 1, characterized in that: The sludge tank, anaerobic tank, aeration tank and sedimentation tank are all rectangular treatment tanks; and / or, a guide tube is arranged at the center of the sedimentation tank for mud and water separation.

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