Double-circulation integrated sewage treatment station
By using a dual-circulation integrated wastewater treatment station, the wastewater treatment facilities are arranged symmetrically on both sides to achieve sludge recycling, which solves the problems of large land area, high investment, and high operating costs, and improves treatment efficiency and management convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-03-31
AI Technical Summary
Existing wastewater treatment facilities occupy large areas, require high investment, have high operating costs, and are inconvenient to manage, making expansion difficult, especially in areas with limited land.
The integrated wastewater treatment plant with dual circulation is adopted, which arranges the biochemical treatment tank, sedimentation tank and other facilities symmetrically to form a dual circulation structure, reducing the number of connecting pipes and using gravity return to achieve sludge recycling, thus saving equipment investment and power costs.
It improves space utilization, reduces infrastructure and operating costs, enhances treatment capacity, is suitable for denitrification treatment of high ammonia nitrogen wastewater, and is easy to manage.
Smart Images
Figure CN224062570U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a dual-circulation integrated wastewater treatment station. Background Technology
[0002] Biological wastewater treatment is currently the most common and widely used method in the field of wastewater treatment. Although its processes vary, it basically consists of anaerobic tanks, anoxic tanks, aerobic zones, sedimentation tanks, and other facilities with special requirements. The various facilities in a wastewater treatment system are usually arranged according to the flow direction of the process, and each treatment facility is mostly independently installed, requiring a large land area and long pipelines. In today's increasingly land-scarce environment, this involves significant land acquisition costs and the difficult task of coordinating various conflicts arising from land acquisition, especially in newly built or expanded wastewater treatment facilities where the land occupation issue is particularly prominent. Because each treatment facility is independently installed, not only are long connecting pipelines required, but the water level difference between treatment facilities also increases, raising the operating costs of the wastewater treatment plant.
[0003] To address the issue of large land area required for wastewater treatment facilities, membrane bioreactors (MBRs) have recently seen widespread application in the wastewater treatment field. This technology replaces the gravity sedimentation separation process in traditional activated sludge treatment with ultrafiltration and microfiltration membrane separation, saving a significant amount of land area required for gravity separation. However, its high energy consumption, high equipment price, and stringent control requirements severely limit its widespread adoption.
[0004] Ensuring that each wastewater treatment facility meets the required treatment objectives while also being compact, cost-effective, and easy to manage is a pressing challenge in current wastewater treatment engineering. How to rationally utilize the characteristics of each facility in the wastewater treatment process, fully leverage their normal functions, and optimize their layout to achieve a small footprint, low investment cost, and low operating expense is currently a top priority in the wastewater treatment field. Utility Model Content
[0005] In view of this, the present invention proposes a dual-circulation integrated sewage treatment station.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A dual-circulation integrated wastewater treatment plant includes:
[0008] A biochemical treatment tank, one end of which is connected to a sewage inlet pipe;
[0009] A sedimentation tank, located in the middle of the biological treatment tank;
[0010] The biochemical treatment tank and the sedimentation tank are symmetrically arranged;
[0011] The anaerobic zone of the biochemical treatment tank is arranged below the sedimentation tank, and water inlets are arranged on the left and right sides of the sedimentation tank and are communicated with the aerobic zones of the biochemical treatment tank.
[0012] As a further improvement of the above technical solution:
[0013] As an optimization of the above technical solution, the biochemical treatment tank comprises a first anoxic zone, an anaerobic zone, a second anoxic zone and an aerobic zone, the upper part of the first anoxic zone is communicated with a sewage inlet pipe, the two ends of the first anoxic zone are communicated with the aerobic zone, the anaerobic zone is arranged below the sedimentation tank, the two ends of the anaerobic zone are communicated with the first anoxic zone and the second anoxic zone respectively, the two ends of the second anoxic zone are communicated with the aerobic zone, and the lower part of the aerobic zone is communicated with the water inlet of the sedimentation tank.
[0014] As an optimization of the above technical solution, the first anoxic zone is communicated with the anaerobic zone through a reflux pump at the bottom of the anaerobic zone.
[0015] As an optimization of the above technical solution, sewage flows through the first anoxic zone, the anaerobic zone and the second anoxic zone in sequence, the sewage in the second anoxic zone is branched to the left and right aerobic zones, part of the sewage in the left and right aerobic zones is refluxed to the first anoxic zone, and the sewage is circulated to form a left-right symmetrical double loop flow.
[0016] As an optimization of the above technical solution, the upper end of the cross section of the anaerobic zone is triangular, and the lower end is rectangular.
[0017] As an optimization of the above technical solution, air agitators are arranged at the bottoms of the first anoxic zone and the second anoxic zone.
[0018] As an optimization of the above technical solution, an aerator is arranged below the aerobic zone.
[0019] As an optimization of the above technical solution, the sedimentation tank comprises a water distribution zone, a clarification zone, an inclined pipe sedimentation zone, a clear water zone and a water outlet tank, water distribution zones are arranged on the left and right sides below the sedimentation tank, the water distribution zones are communicated with the biochemical treatment tank through water inlets below the water distribution zones, inclined baffles are arranged above the water distribution zones, air vents and water passing openings are arranged on the left and right sides of the inclined baffles respectively, the air vents are communicated with the biochemical treatment tank, the water passing openings are communicated with the clarification zone, the clarification zone is communicated with the inclined pipe sedimentation zone above the clarification zone, the inclined pipe sedimentation zone is communicated with the clear water zone above the inclined pipe sedimentation zone, and water outlet tanks are arranged on the left and right sides above the clear water zone.
[0020] Compared with the prior art, the present application has the advantages that:
[0021] 1. The double loop integrated sewage treatment station provided by the utility model integrates various sewage treatment facilities, the anaerobic zone is located below the sedimentation tank, the space utilization rate is high, the land occupation area is reduced and the capital investment cost is also reduced; meanwhile, the sludge concentration of the sewage treatment system is improved, the treatment capacity of the treatment system is increased, and the treatment effect is improved; there is no connecting pipeline between various sewage treatment facilities, the water flow resistance is small, the equipment investment cost is reduced, and the operation cost is also reduced.
[0022] 2. The double loop integrated sewage treatment station provided by the utility model arranges various sewage treatment facilities in left-right axis symmetry, the entire sewage treatment plant is arranged compactly, the land occupation area is reduced; the operation equipment is less, the maintenance and management are convenient, the first-stage reflux is combined with stirring, the reflux ratio is large, and the double loop integrated sewage treatment station is very suitable for the denitrification treatment of high ammonia-nitrogen wastewater.
[0023] 3. The double loop integrated sewage treatment station provided by the utility model, sludge is automatically completed from the inclined pipe sedimentation zone to the clarification zone, and then is refluxed to the aerobic zone through the water distribution zone by relying on gravity, equipment investment and power cost are saved, the closed loop reflux of the sedimentation sludge from the aerobic zone to the first-stage anoxic zone, from the first-stage anoxic zone to the anaerobic zone, from the anaerobic zone to the second-stage anoxic zone, and from the second-stage anoxic zone to the aerobic zone is completed, and the operation cost is saved. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a side view cross-sectional structure schematic view of the utility model;
[0025] Figure 2 It is a top view structure schematic view of the utility model.
[0026] Figure 3 It is a bottom view cross-sectional structure schematic view of the utility model.
[0027] In the drawing: 1, first-stage anoxic zone; 2, anaerobic zone; 3, second-stage anoxic zone; 4, aerobic zone; 5, sewage inlet pipe; 6, reflux pump; 7, water inlet; 8, air stirrer; 9, aerator; 10, water distribution zone; 11, clarification zone; 12, inclined pipe sedimentation zone; 13, clear water zone; 14, water outlet tank; 15, inclined baffle; 16, air vent; 17, water passage. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0029] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two;The terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0030] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0031] As shown in Figures 1 to 3 The utility model discloses a sewage treatment facility, which mainly comprises a sedimentation tank in the middle and a biochemical treatment tank around the sedimentation tank, and each sewage treatment facility is horizontally arranged and symmetrically arranged around the left and right axes.
[0032] The biochemical sedimentation tank comprises a first anoxic zone 1, an anaerobic zone 2, a second anoxic zone 3 and an aerobic zone 4. Figure 2 As shown in the drawings, the first anoxic zone 1 is located on the left side of the sedimentation tank, the second anoxic zone is located on the right side of the sedimentation tank, and the aerobic zone 4 is arranged on the upper and lower sides of the sedimentation tank, which can be seen as being symmetrically arranged around the central axis. Figure 1 As shown in the drawings, the first anoxic zone 1 is located on the left side of the sedimentation tank, the second anoxic zone is located on the right side of the sedimentation tank, and the aerobic zone 4 is arranged on the upper and lower sides of the sedimentation tank, which can be seen as being symmetrically arranged around the central axis. 3 As shown in the drawings, the first anoxic zone 1 is located on the left side of the sedimentation tank, the second anoxic zone is located on the right side of the sedimentation tank, and the aerobic zone 4 is arranged on the upper and lower sides of the sedimentation tank, which can be seen as being symmetrically arranged around the central axis.
[0033] As shown in the drawings, the first anoxic zone 1 is located on the left side of the sedimentation tank, the second anoxic zone is located on the right side of the sedimentation tank, and the aerobic zone 4 is arranged on the upper and lower sides of the sedimentation tank, which can be seen as being symmetrically arranged around the central axis.
[0034] Then the sewage flows into the second anoxic zone 3 from the other end of the anaerobic zone 2, the sewage in the second anoxic zone 3 is divided into the aerobic zones 4 on the upper and lower sides, and finally the sewage in the two aerobic zones 4 on the sides flows into the first anoxic zone 1.
[0035] At the same time, by the appendix Figure 3 As can be seen from the diagram, an air agitator 8 is installed in the first-level anoxic zone 1. By adjusting the air agitator 8 to increase the dissolved oxygen concentration in the first-level anoxic zone 1, the first-level anoxic zone 1 can be transformed into an aerobic zone 4 to meet the needs of different treatment conditions.
[0036] Similarly, an air stirrer 8 is installed in the secondary anoxic zone 3. By adjusting the air stirrer 8 to increase or decrease the dissolved oxygen concentration in the secondary anoxic zone 3, the secondary anoxic zone 3 can be transformed into an aerobic zone 4 or an anaerobic zone 2 to meet the needs of different treatment situations.
[0037] An aerator 9 is installed at the bottom of the aerobic zone 4. The aerobic zone 4 can be a single zone as shown in the attached diagram, or it can be divided into two or more zones by adding partitions, so as to meet the requirements of different water quality treatment and discharge.
[0038] For sedimentation tanks, by the attached Figure 1 It can be seen that there is a partition between the sedimentation tank and the biological treatment tank, but there are water inlets 7 on the left and right sides at the bottom of the sedimentation tank. At the same time, the sedimentation tank is connected from bottom to top to the water distribution zone 10, the clarification zone 11, the inclined tube sedimentation zone 12, and the clear water zone 13. There is a water outlet trough 14 at the top of the clear water outlet for discharging clear water. The water inlet 7 is connected to the water distribution zone 10.
[0039] An inclined baffle 15 is installed above the water distribution zone 10. The inclined baffle 15 and the adjacent inclined side of the anaerobic zone 3 form a water inlet 17. The water inlet 17 and the vent 16 are respectively on both sides of the inclined baffle 15. The vent 16 is connected to the aerobic zone 4, and the water inlet 17 is connected to the clarification zone 11.
[0040] At the same time, by the appendix Figure 1 As can be seen from this, the cross-sectional shape of the anaerobic zone 2 is triangular at the top and rectangular at the bottom. Thus, the sides of the upper triangle and the inclined baffle 15 form a sludge hopper.
[0041] The sludge in the inclined tube sedimentation zone 12 settles into the clarification zone 11. The excess sludge in the clarification zone 11 enters the water distribution zone 10 through the sludge hopper. The excess sludge in the water distribution zone 10 enters the aerobic zone 4 through the inlet 7. The excess sludge in the aerobic zone 4 is discharged to the outside through the sludge discharge system (not shown in the figure, which is a conventional technology).
[0042] Therefore, the entire sewage treatment process is as follows: sewage enters the primary anoxic zone 1 through the sewage inlet pipe 5, passes through the anaerobic zone 2 and the secondary anoxic zone 3 in sequence, the sewage in the secondary anoxic zone 3 is diverted to the left and right sides and flows into the aerobic zones 4 on the left and right sides, and a part of the sewage in the aerobic zone 4 flows back to the primary anoxic zone 1, thus forming a double loop.
[0043] Another portion of the wastewater in aerobic zone 4 enters the sedimentation tank, and then passes through water distribution zone 10, clarification zone 11, inclined tube sedimentation zone 12, and clear water zone 13 in sequence, before being discharged to the outside through effluent channel 14. The sludge from inclined tube sedimentation zone 12 settles into clarification zone 11, and the excess sludge in clarification zone 11 enters water distribution zone 10. The excess sludge in water distribution zone 10 enters aerobic zone 4, and the excess sludge in aerobic zone 4 is discharged to the outside through the sludge discharge system.
[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A double loop integrated wastewater treatment plant, characterized in that, It comprises: a biochemical treatment tank, which is communicated with a sewage inlet pipe (5) at one end; a sedimentation tank, which is located in the middle of the biochemical treatment tank; the biochemical treatment tank and the sedimentation tank are symmetrically arranged; the lower part of the sedimentation tank is provided with an anaerobic zone (2) of the biochemical treatment tank, and the left and right sides of the sedimentation tank are provided with water inlets (7) which are communicated with aerobic zones (4) of the biochemical treatment tank.
2. The double loop integrated wastewater treatment plant according to claim 1, characterized in that, The biochemical treatment tank comprises a primary anoxic zone (1), an anaerobic zone (2), a secondary anoxic zone (3) and an aerobic zone (4), the upper part of the primary anoxic zone (1) is communicated with the sewage inlet pipe (5), both ends of the primary anoxic zone (1) are communicated with the aerobic zone (4), the anaerobic zone (2) is located below the sedimentation tank, both ends of the anaerobic zone (2) are communicated with the primary anoxic zone (1) and the secondary anoxic zone (3) respectively, both ends of the secondary anoxic zone (3) are communicated with the aerobic zone (4), and the lower part of the aerobic zone (4) is communicated with the water inlets (7) of the sedimentation tank.
3. The twin loop integrated wastewater treatment plant of claim 2, wherein, The primary anoxic zone (1) is communicated with the anaerobic zone (2) through a reflux pump (6) at the bottom of the anaerobic zone (2).
4. The twin loop integrated wastewater treatment plant of claim 2, wherein, The sewage flows through the primary anoxic zone (1), the anaerobic zone (2) and the secondary anoxic zone (3) in sequence, the sewage in the secondary anoxic zone (3) is branched to the left and right aerobic zones (4), part of the sewage in the left and right aerobic zones (4) is refluxed to the primary anoxic zone to circulate, thereby forming a left-right symmetrical double loop flow.
5. The twin loop integrated wastewater treatment plant of claim 2, wherein, The upper end of the anaerobic zone (2) is triangular in cross section, and the lower end is rectangular.
6. The twin loop integrated wastewater treatment plant of claim 2, wherein, Air agitators (8) are arranged at the bottoms of the primary anoxic zone (1) and the secondary anoxic zone (3).
7. The twin loop integrated wastewater treatment plant of claim 2, wherein, An aerator (9) is arranged below the aerobic zone (4).
8. The twin loop integrated wastewater treatment plant of claim 1, wherein, The sedimentation tank comprises a water distribution zone (10), a clarification zone (11), an inclined pipe sedimentation zone (12), a clear water zone (13) and a water outlet tank (14), the left and right sides of the lower part of the sedimentation tank are provided with the water distribution zone (10), the water distribution zone (10) is communicated with the biochemical treatment tank through the water inlets (7) below, the upper part of the water distribution zone (10) is provided with an inclined baffle (15), the left and right sides of the inclined baffle (15) are respectively provided with exhaust holes (16) and water passing holes (17), the exhaust holes (16) are communicated with the biochemical treatment tank, the water passing holes (17) are connected with the clarification zone (11), the upper part of the clarification zone (11) is communicated with the inclined pipe sedimentation zone (12), the upper part of the inclined pipe sedimentation zone (12) is communicated with the clear water zone (13), and the left and right sides of the upper part of the clear water zone (13) are provided with the water outlet tanks (14).