CN108217923B - Three-ditch water flow same-direction Orbal oxidation ditch flow state adjusting structure and method - Google Patents
Three-ditch water flow same-direction Orbal oxidation ditch flow state adjusting structure and method Download PDFInfo
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- CN108217923B CN108217923B CN201711483016.2A CN201711483016A CN108217923B CN 108217923 B CN108217923 B CN 108217923B CN 201711483016 A CN201711483016 A CN 201711483016A CN 108217923 B CN108217923 B CN 108217923B
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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
Abstract
A flow state adjusting structure and method for a three-ditch water flow equidirectional Orbal oxidation ditch comprises an oxidation ditch middle ditch and an oxidation ditch outer ditch which are arranged outside an oxidation ditch, aeration areas and anoxic areas are respectively arranged on the oxidation ditch middle ditch and the oxidation ditch outer ditch at intervals, a partition wall is arranged between the oxidation ditch middle ditch and the oxidation ditch outer ditch, a hole with a certain width is arranged downstream along the water flow direction at the junction of the aeration area and the anoxic area on the partition wall, raw water firstly enters the oxidation ditch outer ditch anoxic area, water flows through the junction of the outer ditch anoxic area and the outer ditch aeration area, part of the water flows out of the hole, a guide wall in the anoxic area smoothly guides the water flow flowing out of the hole into the downstream middle ditch oxygen deficient area, the water flows to the middle ditch oxygen deficient area from the outer ditch area without changing the direction, the water flows downstream in the middle ditch, part of the water flows into the outer ditch oxygen deficient area again under the action of the hole, an outer guide wall and an inner water guide wall, and the flow continues to flow downstream, the invention has the characteristic of realizing the speed change and energy saving of the oxidation ditch.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a three-ditch water flow same-direction Orbal oxidation ditch flow state adjusting structure and 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, the Orbal oxidation ditch process does not have a gallery completely in an anoxic state due to a pool shape, and the water flow directions in the three galleries of the Orbal oxidation ditch process are the same, 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 flow state adjusting structure and a flow state adjusting method for a three-ditch water flow same-direction Orbal oxidation ditch, which realize the repeated circulation of water flow in an outer ditch and a middle ditch anoxic zone, increase the apparent flow of the anoxic zone, reduce the apparent flow of the aeration zone, achieve the operation effects of low flow rate in the aeration zone and high flow rate in the anoxic zone, and realize the speed-changing and energy-saving effects of the oxidation ditch.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a three-ditch water flow equidirectional 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, wherein an aeration area and an anoxic area 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, and a hole 10 with a certain width is formed at the junction of the aeration area and the anoxic area on the partition wall 3 in the downstream direction along the water flow direction.
The aeration zone is divided into an outer ditch aeration zone 5 and a middle ditch aeration zone 7, and the anoxic zone is divided into an outer ditch anoxic zone 4 and a middle ditch anoxic zone 6;
the outer ditch aeration zone 5 and the middle ditch anoxic zone 6 are in a fan-shaped range with the same point as the center of a circle, and the outer ditch anoxic zone 4 and the middle ditch aeration zone 7 are in a fan-shaped range with the same point as the center of a circle.
The outer ditch aeration zone 5 of the hole 10 is provided with an outer water diversion wall 8, the middle ditch anoxic zone 6 is provided with an inner guide wall 9, the middle ditch aeration zone 7 is provided with an inner water diversion wall 13, and the outer ditch anoxic zone 4 is provided with an outer guide wall 12;
the outer diversion wall 8 and the inner diversion wall 9 of the same hole 10 are respectively positioned at two sides of the hole 10, the curvature is different, and the outer diversion wall 12 and the inner diversion wall 13 are also positioned at two sides of the same hole 10, and the curvature is different;
the curvature of the inner guide wall 9, the curvature of the inner division wall 13 and the curvature of the partition wall 3 are in different directions, and the curvature of the outer guide wall 12, the curvature of the outer division wall 8 and the curvature of the partition wall 3 are in the same direction.
An enclosed area 11 is arranged on the outer water dividing wall 8 and the partition wall 3, and a bottom aeration disc is not arranged in the enclosed area 11.
The water flow between the outer ditch anoxic zone 4 and the middle ditch anoxic zone 6 alternately flows without changing the direction.
A three-ditch water flow same-direction Orbal oxidation ditch flow state adjusting method comprises the steps that raw water firstly enters an outer ditch anoxic zone 4 of an oxidation ditch, the water flows through the junction of the outer ditch anoxic zone 4 and an outer ditch aeration zone 5, part of the water flows out of holes 10 under the action of an outer water dividing wall 8 of the aeration zone, a micropore aeration head is not arranged in an area 11 surrounded by the outer water dividing wall 8 of the aeration zone and a partition wall 3, so that the resistance of an aeration system on the water flow passing through the holes 10 is reduced, the water flows out of the holes 10 are smoothly guided into a downstream middle ditch anoxic zone 6 by an inner flow guide wall 9 of the anoxic zone, the influence of the water flowing out of a mixed liquid hole of the middle ditch anoxic zone 6 can be prevented by an inner flow guide wall 9 of the anoxic zone, the water flows into the middle ditch anoxic zone 6 from the outer ditch 4 without changing the direction under the action of the holes 10, the outer water dividing wall 8 and the inner flow guide wall 9, the water flows downstream in the middle ditch anoxic zone 6, and when the water flows through the junction of the middle ditch oxygen zone 6, part of the water flow enters the next outer ditch anoxic zone 4 under the action of the holes 10, the outer guide wall 12 and the inner dividing wall 13, and continues to flow downstream, and the process is repeated.
The invention has the beneficial effects that:
according to the invention, through the structural design of the outer ditch and the middle ditch of the Orbal oxidation ditch, the repeated circulation of water flow in the anoxic zones of the outer ditch and the middle ditch without changing the direction is realized, 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 aeration zone and high flow rate of the anoxic zone are achieved, and the variable-speed and energy-saving effects of the oxidation ditch are realized.
Drawings
FIG. 1 is a schematic view of the flow state regulation method and structure of the Orbal oxidation ditch with three ditches of water flow in the same direction.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, firstly, the mixed liquid water flow direction in the outer Orbal oxidation ditch 1 and the middle Orbal oxidation ditch 2 is kept the same, and the microporous aeration zones are arranged in the outer Orbal oxidation ditch 1 and the middle oxidation ditch 2 in a staggered way, so that the outer ditch aeration zone 5 and the middle ditch anoxic zone 6 are in a fan-shaped range with the same point as the center of circle, and the outer ditch anoxic zone 4 and the middle ditch aeration zone 7 are in a fan-shaped range with the same point as the center of circle. Then, a hole 10 is formed in a partition wall 3 of an outer ditch 1 and an inner ditch 2 of the oxidation ditch, the hole 10 is formed downstream along the water flow direction from the junctions of an outer ditch aeration zone 5, a middle ditch aeration zone 7, an outer ditch anoxic zone 4 and a middle ditch anoxic zone 6, the outer ditch aeration zone 5 of the hole 10 is provided with an outer water dividing wall 8, the middle ditch anoxic zone 6 is provided with an inner guide wall 9, the middle ditch aeration zone 7 is provided with an inner water dividing wall 13, and the outer ditch anoxic zone 4 is provided with an outer guide wall 12; the outer diversion wall 8 and the inner diversion wall 9 of the same hole 10 are respectively positioned at two sides of the hole 10, the curvature is different, and the outer diversion wall 12 and the inner diversion wall 13 are also positioned at two sides of the same hole 10, and the curvature is different; the curvature of the inner guide wall 9, the inner division wall 13 and the partition wall 3 is different, and the curvature of the outer guide wall 12, the outer division wall 8 and the partition wall 3 is the same. So that the mixed liquor does not change the direction of the water flow after passing through the holes 10. The aeration zone is outer to divide waterwall 8, interior waterwall 13 and partition wall 3 to surround region 11 and do not set up bottom aeration dish to reduce aeration system and pass the influence of hole 10 to rivers, reduce the resistance that rivers passed hole 10, guarantee that mixed liquid smoothly passes in from hole 10. Through the structural design of the outer ditch and the middle ditch of the Orbal oxidation ditch, the repeated circulation of water flow in the outer ditch anoxic zone 4 and the middle ditch anoxic zone 6 without changing the direction is realized, 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 aeration zone and high flow rate of the anoxic zone are achieved, and the variable-speed and energy-saving effects of the oxidation ditch are realized.
The detailed process of the invention is as follows:
raw water firstly enters an outer ditch anoxic zone 4 of the oxidation ditch, water flows through the junction of the outer ditch anoxic zone 4 and an outer ditch aeration zone 5, and partial water flows out of holes 10 under the action of a water dividing wall 8 outside the aeration zone. Meanwhile, the surrounding area 11 of the water dividing wall 8 and the partition wall 3 outside the aeration area is not provided with a micropore aeration head, so that the resistance of the aeration system to water flow passing through the holes 10 is reduced. The flow guide wall 9 in the anoxic zone smoothly guides the water flow flowing out of the holes 10 into the downstream middle ditch anoxic zone 6, and the flow guide wall 9 in the anoxic zone can prevent the mixed liquid in the middle ditch anoxic zone 6 from influencing the water flowing out of the holes. Under the action of the holes 10, the outer water dividing walls 8 and the inner guide walls 9, water flows from the outer ditch anoxic zone 4 to the middle ditch anoxic zone 6 without changing the direction, the water flows downstream in the middle ditch anoxic zone 6, when the water flows through the junction of the middle ditch anoxic zone 6 and the middle ditch aeration zone 7, part of the water flows enter the next outer ditch anoxic zone 4 of the outer ditch again under the action of the holes 10, the outer guide walls 12 and the inner guide walls 13 and continuously flows downstream, and the processes are repeated.
Claims (4)
1. A three-ditch water flow equidirectional 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 an aeration zone and an anoxic zone 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), and a hole (10) with a certain width is formed at the junction of the aeration zone and the anoxic zone on the partition wall (3) in the downstream direction along the water flow direction;
the aeration zone is divided into an outer ditch aeration zone (5) and a middle ditch aeration zone (7), and the anoxic zone is divided into an outer ditch anoxic zone (4) and a middle ditch anoxic zone (6);
the outer ditch aeration zone (5) and the middle ditch anoxic zone (6) are in a fan-shaped range taking the same point as the center of a circle, and the outer ditch anoxic zone (4) and the middle ditch aeration zone (7) are in a fan-shaped range taking the same point as the center of a circle;
the water flow between the outer ditch anoxic zone (4) and the middle ditch anoxic zone (6) alternately flows without changing the direction.
2. The structure for conditioning the current state of the Orbal oxidation ditch with the same direction of the water flow in the three ditches as in claim 1, wherein the outer ditch aeration zone (5) of the hole (10) is provided with an outer water dividing wall (8), the middle ditch anoxic zone (6) is provided with an inner guide wall (9), the middle ditch aeration zone (7) is provided with an inner water dividing wall (13), and the outer ditch anoxic zone (4) is provided with an outer guide wall (12);
the outer diversion wall (8) and the inner diversion wall (9) of the same hole (10) are respectively positioned at two sides of the hole (10) and have different curvature directions, and the outer diversion wall (12) and the inner diversion wall (13) are also positioned at two sides of the same hole (10) and have different curvature directions;
the curvature of the inner guide wall (9), the curvature of the inner water dividing wall (13) and the curvature of the partition wall (3) are different, and the curvature of the outer guide wall (12), the curvature of the outer water dividing wall (8) and the curvature of the partition wall (3) are the same.
3. The structure of claim 2, wherein the outer dividing wall (8) and the partition wall (3) have an enclosure region (11), and the enclosure region (11) is not provided with a bottom aeration plate.
4. The method for adjusting the flow state adjusting structure of the Orbal oxidation ditch with the same direction of the three ditches of water flow as in claim 1 is characterized in that raw water firstly enters the outer ditch anoxic zone (4) of the oxidation ditch, the water flow passes through the junction of the outer ditch anoxic zone (4) and the outer ditch aeration zone (5), under the action of the outer water dividing wall (8) of the aeration zone, part of the water flow flows out from the holes (10), meanwhile, no microporous aeration head is arranged in the surrounding area (11) of the outer water dividing wall (8) and the partition wall (3) of the aeration zone, so that the resistance of the aeration system to the water flow passing through the holes (10) is reduced, the water flow flowing out from the holes (10) is smoothly guided into the downstream middle ditch anoxic zone (6) by the inner guide wall (9) of the anoxic zone, the influence of the mixed liquid in the middle ditch anoxic zone (6) on the water outlet of the holes can be prevented by the inner guide wall (9) and the water flow under the action of the holes (10), the outer water dividing wall (8) and, the water flows to the middle ditch anoxic zone (6) from the outer ditch anoxic zone (4) without changing the direction, the water flows downstream in the middle ditch anoxic zone (6), when the water flows through the junction of the middle ditch anoxic zone (6) and the middle ditch aeration zone (7), part of the water flows enter the next outer ditch anoxic zone (4) of the outer ditch again under the action of the holes (10), the outer guide wall (12) and the inner water dividing wall (13) and continuously flow downstream, and the processes are repeated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711483016.2A CN108217923B (en) | 2017-12-29 | 2017-12-29 | Three-ditch water flow same-direction Orbal oxidation ditch flow state adjusting structure and method |
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| CN201711483016.2A CN108217923B (en) | 2017-12-29 | 2017-12-29 | Three-ditch water flow same-direction Orbal oxidation ditch flow state adjusting structure and method |
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| CN108217923A CN108217923A (en) | 2018-06-29 |
| CN108217923B true CN108217923B (en) | 2020-11-24 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2587712B2 (en) * | 1990-06-26 | 1997-03-05 | 株式会社クボタ | Wastewater treatment equipment |
| JP4579450B2 (en) * | 2001-05-18 | 2010-11-10 | 住友重機械エンバイロメント株式会社 | Operation control method of oxidation ditch |
| US6830689B2 (en) * | 2003-05-05 | 2004-12-14 | United States Filter Corporation | Process for removing phosphorus from wastewater utilizing a triple basin wastewater treatment system |
| CN101172705A (en) * | 2007-09-21 | 2008-05-07 | 中国科学技术大学 | High-efficiency oxidation ditch biological sewage treatment method and system |
| CN201952322U (en) * | 2010-10-26 | 2011-08-31 | 北京市环境保护科学研究院 | Anaerobic micropore aeration oxidation ditch reactor |
| CN102001744B (en) * | 2010-12-31 | 2012-05-23 | 重庆市渝西水务有限公司 | Integral Orbal oxidation ditch combination type aeration system |
| CN102259983B (en) * | 2011-07-21 | 2014-05-14 | 中国科学院生态环境研究中心 | Mixed liquor reflux regulation and control equipment for enhancing denitrification and energy-saving functions of oxidation ditch and operation method |
| CN103663698B (en) * | 2013-12-27 | 2015-05-13 | 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 |
| CN208684520U (en) * | 2017-12-29 | 2019-04-02 | 陕西科技大学 | A kind of three ditch water flows Orbal oxidation ditch speed change flowing state regulating structure in the same direction |
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