Large-circulation-flow efficient denitrification integrated sewage treatment equipment

Abstract

The utility model relates to the technical field of sewage treatment environmental protection, in particular to large-circulation-flow efficient denitrification integrated sewage treatment equipment which comprises an outer shell, an inner shell, a biochemical area effluent weir, a settling area effluent weir, an effluent converging pipe, a settling area central pipe and a settling area sludge discharge pipe, the inner shell divides the interior of the outer shell into an inner cavity and an outer cavity, a settling zone central pipe is arranged in the inner shell and communicated with a biochemical zone effluent weir, the biochemical zone effluent weir is located in the outer cavity of the outer shell, a settling zone effluent weir is arranged in the inner shell and communicated with an effluent converging pipe, and the biochemical zone effluent weir is located in the outer cavity of the outer shell. The sewage treatment device has the advantages that the occupied space is small, an annular circulation structure is adopted, no dead angle exists in the water flow circulation process, silt accumulation is not prone to occurring, the biochemical pool and the sedimentation pool share the same wall, the structure of the biochemical pool is simplified, therefore, machining materials are reduced, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment environmental protection, in particular to a large-circulation-flow high-efficiency denitrification integrated sewage treatment device. Background Technique

[0002] At present, for the treatment projects of high-ammonia-nitrogen industrial wastewater and domestic sewage with unbalanced carbon-nitrogen ratio in China, the long-range nitrification and denitrification process technology is generally adopted, and relatively long and large storage containers are used. This not only consumes a large amount of aeration gas volume and carbon source, but also the denitrification process is not complete, resulting in exceeding the total nitrogen standard, increasing the operation and maintenance costs. On the other hand, for traditional sewage treatment facilities, the anoxic section, carbon removal section, nitrification section and sedimentation tank are usually built separately, with a complex structure. Usually, different models of reflux pumps need to be configured to realize sludge reflux and mixed liquor reflux respectively, resulting in high construction costs and long construction periods. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the utility model provides a large-circulation-flow high-efficiency denitrification integrated sewage treatment device, which has the effects of occupying less space, having an annular flow-through structure, having no dead corners in the water flow circulation process, being not easy to accumulate silt, sharing a wall between the biochemical tank and the sedimentation tank, simplifying the structure of the biochemical tank, thereby reducing the processing materials used and saving the production cost.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the utility model provides the following technical solutions: A large-circulation-flow high-efficiency denitrification integrated sewage treatment device includes an outer shell, an inner shell, a biochemical area effluent weir, a sedimentation area effluent weir, an effluent confluence pipe and a sedimentation area central pipe. An inner shell is arranged inside the outer shell, and the inner shell divides the inside of the outer shell into an inner cavity and an outer cavity. A sedimentation area central pipe is arranged inside the inner shell, and the sedimentation area central pipe is communicated with the biochemical area effluent weir. The biochemical area effluent weir is located in the outer cavity of the outer shell. A sedimentation area effluent weir is arranged inside the inner shell, and the sedimentation area effluent weir is communicated with the effluent confluence pipe. The other end of the effluent confluence pipe extends to the outside of the outer shell;

[0007] It further includes a sedimentation area sludge discharge pipe. The sedimentation area sludge discharge pipe passes through the outer cavity of the outer shell. One end of the sedimentation area sludge discharge pipe is communicated with the inner shell, and the other end of the sedimentation area sludge discharge pipe communicates with the outside of the outer shell. The end of the sedimentation area sludge discharge pipe located inside the inner shell faces downward.

[0008] Preferably, it further includes an aeration pipe. The outer cavity of the outer shell is divided into several aerobic biochemical areas and several anoxic biochemical areas, and several aeration pipes are installed inside the aerobic biochemical areas.

[0009] Preferably, it further includes a propeller. Several propellers are arranged inside the outer cavity of the outer shell, and the propellers are used to push the liquid flow inside the outer cavity.

[0010] Preferably, it further includes a sedimentation area reflector. A plurality of sedimentation area reflectors are arranged inside the inner housing. The sedimentation area reflectors and the sedimentation area central pipe are arranged opposite to each other. One end of the sedimentation area reflector facing the sedimentation area central pipe is in a sharp angle shape.

[0011] Preferably, it further includes a biochemical area filler. The outer cavity of the outer housing is provided with a biochemical area filler.

[0012] Preferably, the aerobic biochemical area and the anoxic biochemical area in the outer cavity of the outer housing are arranged alternately.

[0013] Preferably, one end of the sedimentation area central pipe facing the sedimentation area reflector is in a flared shape.

[0014] Preferably, both the outer housing and the inner housing are in a vertical cylindrical shape.

[0015] Preferably, the bottom of the inner housing is in a downwardly contracting shape.

[0016] Preferably, the sedimentation area effluent weir is annular.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present utility model provides a large-circulation-flow high-efficiency denitrification integrated sewage treatment device, which has the following beneficial effects:

[0019] In this large-circulation-flow high-efficiency denitrification integrated sewage treatment device, the inner housing separates the inside of the outer housing to form an inner cavity and an outer cavity. An anoxic biochemical area and an aerobic biochemical area are formed in the outer cavity, and the inside of the inner housing is a sedimentation area. When filtering sewage, the settled sludge is discharged through the sedimentation area sludge discharge pipe. Such a circulating treatment system occupies a small space. Sewage can be circulated outside the inner housing to be circulated and transported for treatment in the anoxic biochemical area and the aerobic biochemical area. The chemical agents required for sewage treatment are respectively added at the biochemical area effluent weir and the sedimentation area central pipe. After being mixed through the sedimentation area central pipe, they are put into the inside of the inner housing, which is beneficial for sewage treatment. During the treatment process, the external adopts a circulating flow method to react in different biochemical areas, and the internal adopts a sedimentation method. The annular flow structure ensures that there are no dead ends in the water flow circulation process, and it is not easy to accumulate silt. The biochemical pool and the sedimentation pool share a common wall, which simplifies the structure of the biochemical pool, thereby reducing the processing materials used and saving the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present utility model;

[0021] Figure 2 It is for the present utility model Figure 1 The cross-sectional structural diagram at A-A in;

[0022] Figure 3This is a top view structural schematic diagram of the present utility model.

[0023] Reference numerals in the drawings: 1, outer housing; 2, inner housing; 3, biochemical zone effluent weir; 4, sedimentation zone effluent weir; 5, effluent confluence pipe; 6, sedimentation zone central pipe; 7, sedimentation zone reflector; 8, biochemical zone packing; 9, sedimentation zone sludge discharge pipe; 10, aeration pipe; 11, agitator. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment:

[0026] Please refer to Figures 1-3 , a large-circulation-flow high-efficiency denitrification integrated sewage treatment device, including an outer housing 1, an inner housing 2, a biochemical zone effluent weir 3, a sedimentation zone effluent weir 4, an effluent confluence pipe 5 and a sedimentation zone central pipe 6. An inner housing 2 is arranged inside the outer housing 1. The inner housing 2 divides the interior of the outer housing 1 into an inner cavity and an outer cavity. A sedimentation zone central pipe 6 is arranged inside the inner housing 2. The sedimentation zone central pipe 6 is communicated with the biochemical zone effluent weir 3. The biochemical zone effluent weir 3 is located in the outer cavity of the outer housing 1. A sedimentation zone effluent weir 4 is arranged inside the inner housing 2. The sedimentation zone effluent weir 4 is communicated with the effluent confluence pipe 5. The other end of the effluent confluence pipe 5 extends to the outside of the outer housing 1;

[0027] This sewage treatment device further includes a sedimentation zone sludge discharge pipe 9. The sedimentation zone sludge discharge pipe 9 passes through the outer cavity of the outer housing 1. One end of the sedimentation zone sludge discharge pipe 9 is communicated with the inner housing 2, and the other end of the sedimentation zone sludge discharge pipe 9 communicates with the outside of the outer housing 1. The end of the sedimentation zone sludge discharge pipe 9 located inside the inner housing 2 faces downward.

[0028] The biochemical pool is a single ring shape with large-circulation reflux, and anoxic and aerobic processes alternate. The denitrification process is effectively controlled within the range of short-cut nitrification and denitrification, achieving high-efficiency denitrification. Sedimentation is carried out in the internal central area, which is suitable as the core treatment device for high-ammonia-nitrogen wastewater or domestic sewage with an imbalanced carbon-nitrogen ratio.

[0029] When the user has relatively high requirements for the suspended solid concentration or total phosphorus control of the effluent, PAC and PAM can be added to the central pipe 6 of the sedimentation zone to promote the removal of suspended solids and total phosphorus. In sewage treatment, PAC and PAM are usually used together to give full play to their respective advantages and improve the treatment effect. A number of inlet pipes are connected to the outer shell 1. The inner shell 2 divides the interior of the outer shell 1 into an inner cavity and an outer cavity. An anoxic biochemical zone and an aerobic biochemical zone are formed in the outer cavity. The inside of the inner shell 2 is a sedimentation zone. When filtering sewage, the settled sludge is discharged through the sludge discharge pipe 9 of the sedimentation zone. Such a circulating treatment system occupies a small space. The sewage can be circulated outside the inner shell 2 to circulate and transport the treated sewage in the anoxic biochemical zone and the aerobic biochemical zone. The chemical agents for sewage treatment to be added are respectively put at the biochemical zone effluent weir 3 and the central pipe 6 of the sedimentation zone. After being mixed at the central pipe 6 of the sedimentation zone, they are put into the inside of the inner shell 2, which is beneficial to sewage treatment. During the treatment process, the external adopts a circulating flow mode to react in different biochemical zones, and the internal adopts a sedimentation mode, with an annular circulation structure. There are no dead corners in the water flow circulation process, and it is not easy to accumulate silt. The biochemical pool and the sedimentation pool share a wall, which simplifies the structure of the biochemical pool, thereby reducing the processing materials used and saving the production cost.

[0030] This sewage treatment equipment also includes an aeration pipe 10. The outer cavity of the outer shell 1 is divided into several aerobic biochemical zones and several anoxic biochemical zones. A number of aeration pipes 10 are installed inside the aerobic biochemical zones. The aeration pipe 10 is a pipeline for transporting gas. It is preferable to install nozzles at the gas jetting places of the pipeline. Through the setting of the aeration pipe 10, the aerobic biochemical zones can maintain a good oxygen content. This is preferably a relatively large device. The aeration pipe 10 is installed in a position where good ventilation can be achieved to maintain a good reaction effect in the aerobic biochemical zones.

[0031] This sewage treatment equipment also includes a pusher 11. A number of pushers 11 are arranged inside the outer cavity of the outer shell 1. The pusher 11 is used to push the liquid flow inside the outer cavity. Through the pusher 11, a low energy consumption and large reflux ratio are achieved. The treatment of sewage is equivalent to experiencing many groups of anoxic-aerobic processes. The denitrification process is effectively controlled within the range of short-cut nitrification and denitrification, quickly realizing the functions of carbon removal and denitrification, and saving the aeration gas consumption and carbon source.

[0032] This sewage treatment equipment also includes a sedimentation zone reflector 7. A number of sedimentation zone reflectors 7 are arranged inside the inner shell 2. The sedimentation zone reflector 7 and the central pipe 6 of the sedimentation zone are arranged opposite to each other. One end of the sedimentation zone reflector 7 facing the central pipe 6 of the sedimentation zone is in a sharp angle shape. Preferably, the sedimentation zone reflector 7 is connected to the inner wall of the inner shell 2, or a bracket for supporting the sedimentation zone reflector 7 is arranged inside the inner shell 2 to ensure the fixed position of the sedimentation zone reflector 7. Through the setting of the sedimentation zone reflector 7, the water flow transmitted to the inside of the inner shell 2 can be dispersed at the sedimentation zone reflector 7, so that the transported sewage is evenly distributed inside the inner shell 2, which is beneficial to the sedimentation of sludge in the sewage.

[0033] This sewage treatment device further includes a biological treatment area filler 8. The outer chamber of the outer housing 1 is provided with the biological treatment area filler 8. The biological treatment area filler 8 is a soft filler, semi-soft filler, combined filler, suspended filler, etc., such as PP and PE fillers. By providing the biological treatment area filler 8, a place for microorganisms to attach and grow is provided, the oxygen transfer rate and utilization rate are increased, the purification effect of the sewage is enhanced, and the stability of the sewage treatment system is improved.

[0034] Among them, the aerobic biological treatment area and the anoxic biological treatment area in the outer chamber of the outer housing 1 are arranged alternately. Preferably, the biological treatment area is divided into two anoxic biological treatment areas and two aerobic biological treatment areas, which are arranged alternately. An aeration device is configured at the bottom of the aerobic area, and no aeration device is configured in the anoxic area. Through the alternately arranged aerobic biological treatment area and anoxic biological treatment area, the transmitted sewage can be circulated and treated at a better conveying location, and repeatedly undergo environmental changes between aerobic and anoxic conditions to obtain a better sewage treatment effect.

[0035] Among them, one end of the central pipe 6 of the sedimentation area facing the sedimentation area reflector 7 is flared. Through the flared shape, the transmitted sewage can be dispersed at the bottom of the central pipe 6 of the sedimentation area, improving the dispersion effect.

[0036] Among them, both the outer housing 1 and the inner housing 2 are in the shape of a vertical cylinder. The cross-section of the sedimentation tank is a circular structure, and the bottom sludge storage area is not prone to silt accumulation. The large-circulation flow high-efficiency denitrification integrated sewage treatment device is in the shape of a vertical cylinder and is mainly composed of two major parts: a biological treatment area and a sedimentation area. The biological treatment area is located in the outer ring area, and the sedimentation area is located in the central inner circle area.

[0037] Among them, the bottom of the inner housing 2 is in a downwardly contracting shape. Through this downwardly contracting form, it is beneficial to centrally convey the sewage to the bottom area of the inner housing 2, facilitating the centralized treatment of sludge.

[0038] Among them, the effluent weir 4 of the sedimentation area is annular. By surrounding the upper side of the inner wall of the inner housing 2 with the annular effluent weir 4 of the sedimentation area, a large water collection effect is provided.

[0039] During use, the sewage is conveyed through the water inlet to the inside of the outer chamber of the outer housing 1. The pusher 11 is started, and the pusher 11 drives the sewage to circulate in the outer chamber of the outer housing 1. Then, it overflows through the biological treatment area effluent weir 3 and is conveyed to the inside of the support part. After sedimentation inside the inner housing 2, it overflows and is conveyed to the sedimentation area effluent weir 4 and is discharged through the effluent confluence pipe 5.

[0040] It should be noted that the phrases such as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when describing a specific feature, structure or characteristic in combination with an embodiment, it is within the knowledge scope of those skilled in the art to implement such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0041] It should be easily understood that the terms "on", "above", and "over" in the present disclosure should be interpreted in the broadest manner, such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only include the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0042] In addition, for the convenience of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive words used in the text may be interpreted accordingly.

[0043] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Large circulation flow high efficiency denitrification integrated sewage treatment equipment, characterized by: The invention comprises an outer shell (1), an inner shell (2), a biochemical zone water outlet weir (3), a sedimentation zone water outlet weir (4), a water outlet converging pipe (5) and a sedimentation zone central pipe (6); the inner shell (2) is arranged inside the outer shell (1); the inner shell (2) divides the inner part of the outer shell (1) into an inner chamber and an outer chamber; the inner shell (2) is arranged inside the sedimentation zone central pipe (6); the sedimentation zone central pipe (6) is connected to the biochemical zone water outlet weir (3); the biochemical zone water outlet weir (3) is located in the outer chamber of the outer shell (1); the inner shell (2) is arranged inside the sedimentation zone water outlet weir (4); the sedimentation zone water outlet weir (4) is connected to the water outlet converging pipe (5); the other end of the water outlet converging pipe (5) extends to the outside of the outer shell (1); The device also comprises a sedimentation area mud discharge pipe (9), which passes through the outer chamber of the outer shell (1), one end of the sedimentation area mud discharge pipe (9) is connected to the inner shell (2), and the other end of the sedimentation area mud discharge pipe (9) is connected to the outside of the outer shell (1), and the sedimentation area mud discharge pipe (9) is located inside the inner shell (2) with one end facing downward.

2. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized in that: It also includes an aeration pipe (10). The outer chamber of the outer shell (1) is divided into a plurality of aerobic biochemical zones and a plurality of anoxic biochemical zones. A plurality of aeration pipes (10) are installed inside the aerobic biochemical zones.

3. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized in that: The invention also comprises a flow promoter (11). A plurality of flow promoters (11) are arranged inside the outer chamber of the outer shell (1). The flow promoters (11) are used to promote the flow of liquid inside the outer chamber.

4. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized in that: It also comprises a sedimentation area reflection plate (7). A plurality of sedimentation area reflection plates (7) are arranged inside the inner shell (2). The sedimentation area reflection plates (7) and the sedimentation area central tube (6) are arranged opposite to each other. One end of the sedimentation area reflection plates (7) facing the sedimentation area central tube (6) is in a sharp angle shape.

5. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized in that: It also comprises a biochemical zone filler (8), and the outer chamber of the outer shell (1) is provided with the biochemical zone filler (8).

6. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized by: The aerobic biochemical zone and the anoxic biochemical zone of the outer chamber of the outer shell (1) are arranged alternately.

7. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized by: One end of the sedimentation zone central tube (6) facing the sedimentation zone reflection plate (7) is in a flared shape.

8. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized by: The outer shell (1) and the inner shell (2) are both vertical cylindrical.

9. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized by: The bottom of the inner shell (2) is in a downwardly contracted shape.

10. The large circulation flow high-efficiency denitrification integrated sewage treatment equipment according to claim 1 is characterized by: The sedimentation zone outlet weir (4) is annular.

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