CN108128890B - Three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and method - Google Patents
Three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and method Download PDFInfo
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- CN108128890B CN108128890B CN201711483006.9A CN201711483006A CN108128890B CN 108128890 B CN108128890 B CN 108128890B CN 201711483006 A CN201711483006 A CN 201711483006A CN 108128890 B CN108128890 B CN 108128890B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1257—Oxidation ditches
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
A flow state adjusting structure and method for a three-ditch water flow anisotropic Orbal oxidation ditch comprises an aeration zone and an anoxic zone which are respectively arranged on a middle ditch and an outer ditch of the oxidation ditch at intervals, the aeration zone and the anoxic zone are arranged at intervals, a partition wall is arranged between the middle ditch and the outer ditch of the oxidation ditch, holes are arranged at the junction of the aeration zone and the anoxic zone on the partition wall along the direction of the anoxic zone, the aeration zone is parallelly overlapped and arranged in the middle ditch and the outer ditch of the oxidation ditch, raw water firstly enters the anoxic zone of the outer ditch of the oxidation ditch, water flows through the junction of the anoxic zone of the outer ditch and the aeration zone of the outer ditch, partial water flows out of the holes, an inner guide wall smoothly guides the water flow flowing out of the holes into the anoxic zone of the middle ditch, the water flows back to the anoxic zone of the middle ditch from the change of the direction of the anoxic zone of the outer ditch, when the water flow flows through the junction of the anoxic zone of the middle ditch and the aeration zone of the middle ditch, partial water flow, and continuously flows downstream, and the processes are repeated, so that the invention realizes the characteristics of speed change and energy saving of the oxidation ditch flow state regulation.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and a method.
Background
The oxidation ditch process is a common sewage treatment process, the traditional oxidation ditch process adopts surface aeration equipment which plays roles of oxygenation, plug flow and stirring, and the flow rate of the oxidation ditch process is generally controlled to be more than 0.3m/s in order to ensure that activated sludge of an oxidation ditch system is in a suspension state. In order to improve the aeration efficiency of the system and reduce the operation energy consumption, the micropore aeration system is gradually popularized and applied in an oxidation ditch process in recent years. The high flow rate of the microporous aeration zone of the oxidation ditch is actually a waste of energy because the microporous aeration zone does not need high flow rate to maintain the mixed body of activated sludge due to the gas mixing and lifting action of the microporous aerator arranged at the bottom of the tank. Aiming at the problem, Pengshou clever et al provide a variable speed oxidation ditch process technology, and increase the overflowing area of an aeration area by changing the width and the depth of a corridor of the aeration area of an oxidation ditch, so as to reduce the flow rate of an aeration mixed solution, and provide an equal-depth variable speed and equal-width variable speed oxidation ditch process. The process is suitable for a newly-built oxidation ditch sewage treatment process, and the tank shape modification of the built oxidation ditch process is difficult to implement and has high cost. Aiming at the problems existing in the pool-shaped modified variable-speed oxidation ditch, Jinpengkang and the like provide a method, a structure and a structure for adjusting the opening and the flow state without changing the pool shape of the oxidation ditch. However, the implementation of the process requires that the oxidation ditch process must have an independent anoxic zone gallery, i.e., the technique is only suitable for Carrousel oxidation ditch processes with more than three galleries, and the water flow direction of the anoxic zone gallery must be in a different direction. For the Orbal oxidation ditch process with the water flow in the opposite direction in the three galleries, the Orbal oxidation ditch process does not have the gallery completely in an anoxic state due to the pool shape, so that the variable speed flow state regulation cannot be realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and a method, which can reduce the flow of mixed liquid entering an aeration zone, achieve the operation effects of low flow and low flow rate in the aeration zone and high flow rate in an anoxic zone, and realize the effect of flow state adjustment, speed change and energy conservation of the oxidation ditch.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a three-ditch water flow opposite-direction Orbal oxidation ditch flow state adjusting structure comprises an oxidation ditch middle ditch 2 and an oxidation ditch outer ditch 1 which are arranged on the outer side of an oxidation ditch, aeration areas and anoxic areas are respectively arranged on the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1 at intervals, a partition wall 3 is arranged between the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1, holes 4 with certain width are formed in the junction of the aeration areas and the anoxic areas on the partition wall 3 along the direction of the anoxic areas, the aeration areas and the anoxic areas on the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1 are respectively arranged in fan-shaped areas with the same point as the center of a circle, and the aeration areas are parallelly and overlappingly arranged in the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1.
The aeration zone is divided into an outer ditch aeration zone 6 and a middle ditch aeration zone 7, and the anoxic zone is divided into an outer ditch anoxic zone 5 and a middle ditch anoxic zone 8.
The aeration zones are parallelly and overlappingly arranged in the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1, and the aeration zones and the anoxic zones on the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1 are respectively in sector zones taking the same point as the center of a circle.
The edge of the hole at the junction of the aeration zone and the non-aeration zone is provided with an outer water diversion wall 9, an inner water diversion wall 12, an outer guide wall 11 and an inner guide wall 10 which face the anoxic zone.
The guide walls and the water dividing walls arranged on two sides of the same hole 4 are connected to the edge of the hole 4, and the curvature is in the same direction.
The invention has the beneficial effects that:
part of water flow of the invention repeatedly and circularly flows in the anoxic zone of the oxidation ditch middle ditch 2 and the oxidation ditch outer ditch 1, thereby reducing the flow of mixed liquid entering the aeration zone, achieving the operation effects of low flow and low flow rate in the aeration zone and high flow rate in the anoxic zone, and realizing the effects of variable speed and energy saving of the flow state regulation of the oxidation ditch.
Drawings
FIG. 1 is a schematic diagram of the flow state regulation method and structure of the Orbal oxidation ditch with three ditches water flow in different directions.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings and examples.
As shown in figure 1, firstly, the flow directions of the mixed liquid in the middle groove 2 and the outer groove 1 of the Orbal oxidation groove are kept to be opposite, and the microporous aeration zone is arranged in the middle groove 2 and the outer groove 1 of the Orbal oxidation groove in a parallel and overlapped mode, so that the outer groove anoxic zone 5 and the middle groove anoxic zone 8 are in a sector area with the same point as the center of circle. Then, a hole 4 is formed in a partition wall 3 of an oxidation ditch middle ditch 2 and an oxidation ditch outer ditch 1, the hole 4 is formed along the direction of an outer ditch anoxic zone 5 from the junction of an outer ditch aeration zone 6 and the outer ditch anoxic zone 5, an outer water diversion wall 9, an inner water diversion wall 12, an outer water diversion wall 11 and an inner water diversion wall 10 are arranged at the boundary of the outer ditch aeration zone 6 and the outer ditch anoxic zone 5 and from the edge of the hole 4 to the outer ditch anoxic zone 5 and the middle ditch anoxic zone 8, the outer water diversion wall 9 and the inner water diversion wall 10 of the same hole 4 have the same curvature, the outer water diversion wall 11, the outer water diversion wall 9 and the partition wall 3 have the same curvature, and the inner water diversion wall 10, the inner water diversion wall 12 and the partition wall 3 have different curvatures, so that the mixed liquid changes the water flow direction after passing through the hole 4. Through the structural design of the Orbal oxidation ditch outer ditch and the middle ditch, the water flow changes direction and circulates repeatedly between the outer ditch anoxic zone 5 and the middle ditch anoxic zone 8, the apparent flow of the anoxic zone is increased, the apparent flow of the aeration zone is reduced, the running effects of low flow rate of the outer ditch aeration zone 6 and the middle ditch aeration zone 7 and high flow rate of the outer ditch anoxic zone 5 and the middle ditch anoxic zone 8 are achieved, and the speed-changing and energy-saving effects of the oxidation ditch are realized.
The water flow changes the flow direction after passing through the holes 4 and repeatedly and circularly flows between the outer ditch anoxic zone 5 and the middle ditch anoxic zone 8.
The detailed process of the invention is as follows:
raw water firstly enters an outer ditch anoxic zone 5 of an oxidation ditch, water flows through the junction of the outer ditch anoxic zone 5 and an outer ditch aeration zone 6, part of water flows flow out of holes 4 under the action of an outer dividing wall 9, the inner guide wall 10 smoothly guides the water flow out of the holes 4 into a middle ditch anoxic zone 8, the inner guide wall 10 can prevent the influence of mixed liquor in the middle ditch anoxic zone 8 on water outlet of the holes 4, the water flow changes the direction from the outer ditch anoxic zone 5 to flow back to the middle ditch anoxic zone 8 under the action of the holes 4, the outer dividing wall 9 and the inner guide wall 10, the water flow flows downstream in the middle ditch anoxic zone 8, and when the water flow flows through the junction of the middle ditch anoxic zone 8 and the middle ditch aeration zone 7, part of the water flow changes the flow direction again under the action of the holes 4, the inner dividing wall 12 and the outer guide wall 11 to enter the outer ditch anoxic zone 5 and continuously flow downstream, and the processes are repeated.
Claims (2)
1. A three-ditch water flow opposite-direction Orbal oxidation ditch flow state adjusting structure is characterized by comprising an oxidation ditch middle ditch (2) and an oxidation ditch outer ditch (1) which are arranged on the outer side of an oxidation ditch, wherein aeration areas and anoxic areas are respectively arranged on the oxidation ditch middle ditch (2) and the oxidation ditch outer ditch (1) at intervals, a partition wall (3) is arranged between the oxidation ditch middle ditch (2) and the oxidation ditch outer ditch (1), holes (4) with certain width are formed in the junction of the aeration areas and the anoxic areas on the partition wall (3) along the direction of the anoxic areas, the aeration areas are parallelly and overlappingly arranged in the oxidation ditch middle ditch (2) and the oxidation ditch outer ditch (1), and the aeration areas and the anoxic areas on the oxidation ditch middle ditch (2) and the oxidation ditch outer ditch (1) are respectively in sector areas with the same point as the center of a circle;
the edge of the hole at the junction of the aeration zone and the non-aeration zone is provided with an outer water diversion wall (9), an inner water diversion wall (12), an outer guide wall (11) and an inner guide wall (10) which face the anoxic zone;
the guide walls and the water dividing walls arranged on two sides of the same hole (4) are connected to the edge of the hole (4), and the curvature is in the same direction;
the aeration zone is divided into an outer ditch aeration zone (6) and a middle ditch aeration zone (7), and the anoxic zone is divided into an outer ditch anoxic zone (5) and a middle ditch anoxic zone (8).
2. The method for adjusting the flow state of the Orbal oxidation ditch with three ditches of water flow in different directions as claimed in claim 1, wherein the raw water first enters the outer ditch anoxic zone (5) of the oxidation ditch, the water flow passes through the junction of the outer ditch anoxic zone (5) and the outer ditch aeration zone (6), under the action of the outer dividing wall (9), part of the water flow flows out from the holes (4), the inner guide wall (10) smoothly guides the water flow flowing out from the holes (4) into the middle ditch anoxic zone (8), the inner guide wall (10) can prevent the mixed liquid in the middle ditch anoxic zone (8) from influencing the water outlet of the holes (4), the water flow changes the direction from the outer ditch anoxic zone (5) to the middle ditch anoxic zone (8) under the action of the holes (4), the outer dividing wall (9) and the inner guide wall (10), the water flow flows downstream in the middle ditch anoxic zone (8), and when the water flow passes through the junction of the middle ditch anoxic zone (8) and the middle ditch aeration zone (7), part of water flow changes the flow direction again under the action of the holes (4), the inner water dividing wall (12) and the outer guide wall (11) to enter the outer ditch anoxic zone (5) and continues to flow downstream, and the process is repeated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711483006.9A CN108128890B (en) | 2017-12-29 | 2017-12-29 | Three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711483006.9A CN108128890B (en) | 2017-12-29 | 2017-12-29 | Three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and method |
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| CN108128890A CN108128890A (en) | 2018-06-08 |
| CN108128890B true CN108128890B (en) | 2021-01-05 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661682Y (en) * | 2003-11-07 | 2004-12-08 | 安徽国祯环保节能科技股份有限公司 | Surface aeration type integrative oxidation ditch |
| CN2885846Y (en) * | 2005-12-17 | 2007-04-04 | 重庆大学 | Concentric circle-shape movable guide wall type circulation flow reactor |
| CN201424420Y (en) * | 2009-05-11 | 2010-03-17 | 王宝贞 | Composite biologic treating pond with multiple concentric annular galleries |
| CN103663698A (en) * | 2013-12-27 | 2014-03-26 | 西安建筑科技大学 | Method and structure for holing and flow regime regulation without changes in tank shape of oxidation ditch |
| CN205710082U (en) * | 2015-10-22 | 2016-11-23 | 上海中信水务产业有限公司 | A kind of circulation flow ring-shaped multistage Activated sludge-biofilm composite type bioreactor |
| CN208648867U (en) * | 2017-12-29 | 2019-03-26 | 陕西科技大学 | A kind of incorgruous Orbal oxidation ditch speed change flowing state regulating structure of three ditch water flows |
-
2017
- 2017-12-29 CN CN201711483006.9A patent/CN108128890B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661682Y (en) * | 2003-11-07 | 2004-12-08 | 安徽国祯环保节能科技股份有限公司 | Surface aeration type integrative oxidation ditch |
| CN2885846Y (en) * | 2005-12-17 | 2007-04-04 | 重庆大学 | Concentric circle-shape movable guide wall type circulation flow reactor |
| CN201424420Y (en) * | 2009-05-11 | 2010-03-17 | 王宝贞 | Composite biologic treating pond with multiple concentric annular galleries |
| CN103663698A (en) * | 2013-12-27 | 2014-03-26 | 西安建筑科技大学 | Method and structure for holing and flow regime regulation without changes in tank shape of oxidation ditch |
| CN205710082U (en) * | 2015-10-22 | 2016-11-23 | 上海中信水务产业有限公司 | A kind of circulation flow ring-shaped multistage Activated sludge-biofilm composite type bioreactor |
| CN208648867U (en) * | 2017-12-29 | 2019-03-26 | 陕西科技大学 | A kind of incorgruous Orbal oxidation ditch speed change flowing state regulating structure of three ditch water flows |
Non-Patent Citations (1)
| Title |
|---|
| 改良orbal氧化沟回流污泥曝气再生的中试研究;陈秋萍;《中国给水排水》;20081031;第24卷(第19期);第74-76页 * |
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| CN108128890A (en) | 2018-06-08 |
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