CN201882971U - Accurate aeration control system for aerobic activated sludge reactor - Google Patents
Accurate aeration control system for aerobic activated sludge reactor Download PDFInfo
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- CN201882971U CN201882971U CN2010205897059U CN201020589705U CN201882971U CN 201882971 U CN201882971 U CN 201882971U CN 2010205897059 U CN2010205897059 U CN 2010205897059U CN 201020589705 U CN201020589705 U CN 201020589705U CN 201882971 U CN201882971 U CN 201882971U
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- dissolved oxygen
- activated sludge
- aeration
- sludge reactor
- aerobic activated
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- 238000005273 aeration Methods 0.000 title claims abstract description 59
- 239000010802 sludge Substances 0.000 title claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 12
- 238000005276 aerator Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 239000010865 sewage Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 23
- 238000005516 engineering process Methods 0.000 description 9
- 238000005842 biochemical reaction Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000006213 oxygenation reaction Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000167 toxic agent Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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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
The utility model relates to an accurate aeration control system for an aerobic activated sludge reactor, which is suitable for a plug flow aerobic activated sludge reactor. The air supply flow of the aeration equipment can be controlled by determining the value of dissolved oxygen at the tail end of the plug flow aerobic activated sludge reactor; under the conditions that the water quality, the water volume of inflow water and the like change, the aim of inhibiting the great change of the concentration of the dissolved oxygen in a biological reaction tank can be achieved by optimal control, thereby achieving the goal of accurately quantifying the aeration and reducing energy consumption. The accurate aeration control system is an integrated aeration control system and consists of a dissolved oxygen probe, a PID (Proportion Integration Differentiation) controller, a frequency converter, a variable frequency Roots blower and an aeration device.
Description
Technical field
The present invention relates to the accurate aeration Controlling System of a kind of aerobic activated sludge reactor, particularly relate to a kind of accurately method of control of the terminal dissolved oxygen of pulling flow type aerobic biochemical reactor that is applicable to, belong to water treatment field.
Background technology
The present more employing active sludge biological of municipal sewage treatment treatment process promptly utilizes the metabolism of microorganism, makes the organic pollutant that is dissolving, colloidal state in the sewage be converted into stable innoxious substance.Biological treatment process is a complicated biochemical reaction process, and keeping aerobic environment by aeration is one of them important link.Different technology, the mode of aeration is also different, but in the sewage work of nearly all employing active sludge biological treatment process, blast aeration is the link of energy consumption maximum.Come from some domestic sewage work's current consumption, the aeration link has occupied 50 ~ 70% of total power consumption, so the control that becomes more meticulous of aerating system is transformed significant to the energy-saving run of entire sewage treatment plant.
In the typical sewage work, through aeration, the most organic pollutent is converted into carbonic acid gas and water in the former water, and a part of organism is transferred in the mud, still contains a certain amount of organism in the water outlet.Usually wish that more organism transfers in the mud, because the processing cost of mud is relatively low.If the DO(dissolved oxygen concentration) value is too high, consequently more organism is converted into carbonic acid gas and water, promptly consume via the respiration of mud, but this process will consume a large amount of oxygen, causes the waste of aeration, and mud is aging easily.If the DO value is low excessively, then had influence on the breathing of microorganism and the process of adsorb organic compound, cause the outlet water organic substance too high levels.Therefore, the comprehensively consideration of these two aspects, expectation is controlled at DO on the stable level.
Analyze from art breading flow process integral body, sewage treatment process control is owing to flooding velocity, influent quality not stationarity in time, add that biochemical reaction process also is subjected to the influence of season, temperature and weather, Sewage treatment systems has the high and height nonlinear feature of parameter dimension.Accurately the aeration flow control is a complicated research to sewage treatment industry and puts into practice problem.For reach by biological treatment process need air feed, reduce DO value in the biological reaction tank the fluctuation wave amplitude, make biological treatment process be in optimum regime, that is: sewage disposal not only reached set emission standard, but also can save aeration consumption, just be necessary to develop accurate aeration control techniques.
The aerating system of domestic most of sewage works has adopted simple control loop to come the Artificial Control aeration.Adopt dissolved oxygen (DO) detector and motor-driven control valve as simple control loop,, close electric butterfly valve when the DO value in the biochemical reaction tank during greater than some set(ting)values; When the DO value is then opened electric butterfly valve during less than some set(ting)values.The shortcoming of tradition control method is: the one because time lag, promptly from the beginning aeration to the pond in DO change and need for some time, cause the The Control of Dissolved Oxygen fluctuation very big; The 2nd, traditional method energy consumption height, in order to guarantee safe operation, the DO set(ting)value of system can only remain on the higher numerical value, has kept excessive remaining and causes waste; The 3rd, excessive fluctuation can make the coenocorrelation instability in the pond, disturbs the work of biosystem.
Summary of the invention
At present, the pulling flow type aerobic activated sludge process of the more employing of biologic process for treating sewage is as anaerobic-aerobic combination process (A/O technology), anoxic-double oxygen-aerobic combination process (A
2/ O technology) and oxidation ditch process.Bottom aeration and vertical surface aerating have been main two kinds of oxygenation means of oxygen, and most employing blower unit bottom aeration.
Accurate aeration Controlling System provided by the utility model realizes that by an integrated aeration Controlling System this system comprises: dissolved oxygen probe, PID controller, frequency transformer, variable ratio frequency changer roots blower and aerating apparatus five parts.
In order to realize above-mentioned utility model purpose, by the following technical solutions: dissolved oxygen probe is installed in the reaction end of pulling flow type aerobic activated sludge reactor, can gather the dissolved oxygen in the pool inner water in real time and data are transformed into electrical signal and be sent to the PID controller, the PID controller compares the data that collect with the artificial data that are provided with, if dissolved oxygen is lower than the intermediate value of setting district thresholding, PID can improve output frequency by the control of conversion device, the rotating speed of variable ratio frequency changer roots blower increases, air demand increases, and dissolved oxygen concentration raises in the pond; If dissolved oxygen is higher than set(ting)value, PID can reduce output frequency by the control of conversion device, and the rotating speed of variable ratio frequency changer roots blower reduces, and air demand reduces, and dissolved oxygen concentration reduces in the pond.Regulate so repeatedly, in dissolved oxygen concentration is controlled at setting regions.
Preferably, dissolved oxygen probe is installed in pulling flow type aerobic activated sludge reactor reaction end, and it is got a little must be representative, the true dissolved oxygen concentration of this conversion zone of reaction that can be intuitively correct.
Preferably, described dissolved oxygen probe precision is 0.01mg/L, and possesses self-cleaning function.
Preferably, PID gathered dissolved oxygen data in per 15 minutes, and reacted.
Preferably, PID control of conversion device frequency change step-length is 1Hz.
Preferably, frequency conversion fan adopts the positive displacement blower fan, and its power frequency regulation range is at 35Hz ~ 65Hz.
Preferably, aerator adopts the tube aerator of low air flow, and its aeration is comparatively even, can improve the accuracy that dissolved oxygen probe is gathered dissolved oxygen concentration.
When the load impact (may be that change of water quality also may be the sudden change of flow) that the aerobic biochemical reactor is subjected to bearing, the most direct variation that shows as dissolved oxygen, timely feedback by the aeration accuracy-control system and control can be in good time raising or reduce aeration rate, for the metabolism of microorganism provides enough and appropriate oxygen source, improve active sludge treatment efficient, stablize effluent index, resist instantaneous influent load and impact the blowdown presssure that brings.But mud is subjected to the murder by poisoning of toxic substance or the short-term ability to bear that load impact has surpassed microorganism system, and dissolved oxygen changes comparatively violent, need take necessary artificial pressure control.
Accurately the aeration Controlling System provides three kinds of operational modes, promptly local control automatically, artificial control and three kinds of control modes of safe mode of forcing.And communication interface is provided, support data remote.Local control automatically is to recommend control mode, is used for the Sewage Plant sewage treatment process and normally moves, and accurately the aeration Controlling System can reduce the aeration power consumption to greatest extent and prevent the aging of the excessive aeration of mud; Artificial pressure control is to be under the abnormal running condition at the Sewage Plant sewage treatment process, under the situations such as for example the sewage load changes suddenly significantly, sewage contains toxic substance, biochemical reaction tank is in error state (ERST), directly allow manned control mode; Safe mode is a kind of automatic control mode of big remaining, being used for the Sewage Plant sewage treatment process often is under the big disturbed conditions, have under the bigger changing conditions such as in a big way the regular change of the sewage load of water inlet, the water yield that enters biochemical reaction tank, the essence of big remaining control is that the raising system resists big turbulent ability, improves the safe operation coefficient.
The controlled target that accurate aeration Controlling System reaches is: be target with energy-conservation, realize accurately control, according to the demand air feed, reduce Sewage Plant processed in units cost; Stabilizing active sludge organism processing environment improves active sludge treatment efficient; Stablize effluent index, resist instantaneous influent load and impact the blowdown presssure that brings; Precision and intellectuality reduce field personnel's labour intensity.
Description of drawings
Fig. 1 is an accurate aeration Controlling System synoptic diagram provided by the utility model.
1. dissolved oxygen probe; 2.PID controller; 3. frequency transformer; 4. frequency conversion roots blower; 5. aeration is female manages; 6. aerating apparatus.
Fig. 2 sewage work accurate aeration Controlling System system layout.
Fig. 3 does not overlap A for accurate aeration Controlling System and installation being installed and having started two of accurate aeration Controlling System
2The terminal dissolved oxygen curve of cyclical fluctuations of/O technology Aerobic Pond figure.
Embodiment
Dissolved oxygen probe 1 is installed in the reaction end of pulling flow type aerobic activated sludge reactor, can gather the dissolved oxygen in the pool inner water in real time and data are transformed into electrical signal and be sent to PID controller 2, the PID controller compares 2 data that collect and the artificial data that are provided with, if dissolved oxygen is lower than the intermediate value of setting district thresholding, PID controller 2 can improve output frequency by control of conversion device 3, the rotating speed of variable ratio frequency changer roots blower 4 increases, air demand increases, by the female pipe 5 of aeration pressurized air is distributed to 6 pairs of reactors of aerator and carries out oxygenation, dissolved oxygen concentration raises in the pond; If dissolved oxygen is higher than set(ting)value, PID controller 2 can reduce output frequency by control of conversion device 3, and the rotating speed of variable ratio frequency changer roots blower 4 reduces, and air demand reduces, by the female pipe 5 of aeration pressurized air is distributed to 6 pairs of reactors of aerating apparatus and carries out oxygenation, dissolved oxygen concentration reduces in the pond.Regulate so repeatedly, in dissolved oxygen concentration is controlled at setting regions.
Case study on implementation
Certain daily handling ability is 10000m
3Manufacturing district sewage work adopt that anoxic-oxygen-aerobic combination process (A holds concurrently
2/ O technology), two cover technology parallel connections, the sewage of processing mainly is the trade effluent and the part municipal effluent of manufacturing district.
One overlaps A therein
2Accurate aeration Controlling System has been installed in/O the technology, and dissolved oxygen probe adopts Switzerland Zullig dissolved oxygen meter, and its precision is 0.01mg/L, has self-cleaning function, is installed in to support section reaction tank end; Frequency conversion fan is that precious roots blower is liked by Germany, and wind supply quantity is 120m
3/ min, power are 185kW, and 1 usefulness 1 is equipped with; Aerating apparatus adopts micro-pore aeration flexible pipe, and its air flow is 0.6m
3/ (m.h).It is arranged as shown in Figure 2.
Fig. 2 sewage work accurate aeration Controlling System system layout.
Fig. 3 does not overlap A for accurate aeration Controlling System and installation being installed and having started two of accurate aeration Controlling System
2The terminal dissolved oxygen curve of cyclical fluctuations of/O technology Aerobic Pond.
The Aerobic Pond aeration rate of installing and starting accurate aeration Controlling System system is starkly lower than the aeration rate that accurate aeration Controlling System is not installed, continuous recording 3 months aeration data on flows, find to install and Aerobic Pond that the Aerobic Pond that starts accurate aeration Controlling System is not installed accurate aeration Controlling System is relatively saved aeration rate 30 ~ 40%; The same period, the influent quality water yield was identical, and the water outlet result does not have considerable change.Under the arbitrarily given DO set(ting)value (set(ting)value is 2.0mg/L), realized in 64% time ± fluctuation in the 0.1mg/L scope, in 98% time, realized the fluctuation in ± 0.3mg/L scope.Under identical Inlet and outlet water condition of water quality, it is 0.649 degree/cubic meter that the Aerobic Pond of installing and starting accurate aeration Controlling System is handled ton water current consumption, it is 0.996 degree/cubic meter that the Aerobic Pond of not installing and starting accurate aeration Controlling System is handled ton water current consumption, and the Aerobic Pond of installing and starting accurate aeration Controlling System of comparing economizes on electricity 34.84% than the Aerobic Pond processing ton water that this system is not installed.
Claims (4)
1. the accurate aeration Controlling System of aerobic activated sludge reactor comprises: dissolved oxygen probe, PID controller, frequency transformer, variable ratio frequency changer roots blower and aerating apparatus five parts; It is characterized by dissolved oxygen probe is installed in the aerobic activated sludge reactor, it gives the PID controller with the dissolved oxygen data transmission, the output frequency of PID controller control of conversion device, frequency transformer is adjusted the rotating speed of variable ratio frequency changer roots blower, and variable ratio frequency changer roots blower air supply outlet is connected by pipeline with aerating apparatus.
2. according to the accurate aeration Controlling System of the described a kind of aerobic activated sludge reactor of claim 1, it is characterized in that its dissolved oxygen probe is installed on the end of aerobic activated sludge reactor, it becomes the analog quantity current signal to be transferred to the PID controller dissolved oxygen data-switching that collects.
3. according to the accurate aeration Controlling System of the described a kind of aerobic activated sludge reactor of claim 1, it is characterized in that frequency conversion fan adopts the positive displacement roots blower.
4. according to the accurate aeration Controlling System of the described a kind of aerobic activated sludge reactor of claim 1, it is characterized in that aerating apparatus adopts the tube aerator of low air flow, air flow is at 0.5 ~ 1.0m
3/ (m h).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205897059U CN201882971U (en) | 2010-11-04 | 2010-11-04 | Accurate aeration control system for aerobic activated sludge reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205897059U CN201882971U (en) | 2010-11-04 | 2010-11-04 | Accurate aeration control system for aerobic activated sludge reactor |
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| CN201882971U true CN201882971U (en) | 2011-06-29 |
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| CN2010205897059U Expired - Lifetime CN201882971U (en) | 2010-11-04 | 2010-11-04 | Accurate aeration control system for aerobic activated sludge reactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583900A (en) * | 2012-03-08 | 2012-07-18 | 北京工业大学 | Method for removing nitrogen and phosphorus by MBBRs (Moving Bed Biofilm Reactors) with sectionalized water inflow |
| CN109019850A (en) * | 2018-09-18 | 2018-12-18 | 许东俊 | A kind of sewage-treatment plant based on BOD detection |
| CN109133209A (en) * | 2018-08-29 | 2019-01-04 | 重庆工商大学 | Based on the sewage treatment intelligent regulating system simply controlled |
| CN109734250A (en) * | 2019-02-25 | 2019-05-10 | 中国葛洲坝集团第一工程有限公司 | A kind of unattended small towns sewage treatment AAO integrated pond |
| CN110980940A (en) * | 2019-10-31 | 2020-04-10 | 上海市政工程设计研究总院（集团）有限公司 | Aeration system oxygen supply efficiency online monitoring device and optimization control method |
-
2010
- 2010-11-04 CN CN2010205897059U patent/CN201882971U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583900A (en) * | 2012-03-08 | 2012-07-18 | 北京工业大学 | Method for removing nitrogen and phosphorus by MBBRs (Moving Bed Biofilm Reactors) with sectionalized water inflow |
| CN109133209A (en) * | 2018-08-29 | 2019-01-04 | 重庆工商大学 | Based on the sewage treatment intelligent regulating system simply controlled |
| CN109133209B (en) * | 2018-08-29 | 2021-07-16 | 重庆工商大学 | Sewage treatment intelligent regulation system based on simple control |
| CN109019850A (en) * | 2018-09-18 | 2018-12-18 | 许东俊 | A kind of sewage-treatment plant based on BOD detection |
| CN109734250A (en) * | 2019-02-25 | 2019-05-10 | 中国葛洲坝集团第一工程有限公司 | A kind of unattended small towns sewage treatment AAO integrated pond |
| CN110980940A (en) * | 2019-10-31 | 2020-04-10 | 上海市政工程设计研究总院（集团）有限公司 | Aeration system oxygen supply efficiency online monitoring device and optimization control method |
| CN110980940B (en) * | 2019-10-31 | 2024-04-05 | 上海市政工程设计研究总院（集团）有限公司 | On-line monitoring device for oxygen supply efficiency of aeration system and optimization control method |
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Effective date of registration: 20120220 Address after: 100102, building 131, building 2007, Wangjing garden, Chaoyang District, Beijing, Changping District Co-patentee after: Beijing BHT Environment Technology Co., Ltd. Patentee after: Beauty environmental protection technology (Beijing) Co., Ltd. Address before: 100102, building 131, building 2007, Wangjing garden, Chaoyang District, Beijing, Changping District Patentee before: Beauty environmental protection technology (Beijing) Co., Ltd. |
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Owner name: BEIJING BHT ENVIRONMENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: MEISHU ENVIRONMENTAL PROTECTION TECHNOLOGY (BEIJING) CO., LTD. Effective date: 20140625 Free format text: FORMER OWNER: BEIJING BHT ENVIRONMENT TECHNOLOGY CO., LTD. Effective date: 20140625 |
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Address after: 100102 E, Wangjing science and Technology Pioneer Park, Beijing, Chaoyang District, 301A Patentee after: Beijing BHT Environment Technology Co., Ltd. Address before: 100102, B, building 8, International Building, No. 2115, Wangjing East Road, Beijing, Chaoyang District Patentee before: Beijing BHT Environment Technology Co., Ltd. |
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