CN106277299A - A kind of aeration control system based on oxygen consumption rate analyzer and method - Google Patents
A kind of aeration control system based on oxygen consumption rate analyzer and method Download PDFInfo
- Publication number
- CN106277299A CN106277299A CN201610757777.1A CN201610757777A CN106277299A CN 106277299 A CN106277299 A CN 106277299A CN 201610757777 A CN201610757777 A CN 201610757777A CN 106277299 A CN106277299 A CN 106277299A
- Authority
- CN
- China
- Prior art keywords
- aeration
- dissolved oxygen
- value
- oxygen
- rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a kind of aeration control system; this system includes: data acquisition unit, PLC control unit, aeration unit; described data acquisition unit includes OUR analyzer and DO analyzer; described aeration unit includes aerator, micro porous aeration head and effusion meter; described PLC control unit includes the hardware such as switch board, display screen and controls software, and described control software includes that based on OUR value, OTE value and dissolved oxygen value be main control unit and the protected location with DO feedback.Present invention also provides the method utilizing described aeration control system to carry out aeration control; accurate aeration algorithm based on OUR and DO feedback protection module are combined by it; it is possible not only to realize accurate measurements sludge activity; realize the accurate control of aeration rate; the dissolved oxygen that can also solve to cause when system goes wrong is the most too high or too low, reaches effluent quality steady in a long-term and energy-saving and cost-reducing purpose.
Description
Technical field
The present invention relates to sewage treatment area, particularly relate to a kind of aeration control system based on oxygen consumption rate analyzer with
Method.
Background technology
Present stage China industry development and utilization of energy in, energy-saving and emission-reduction remain a critically important problem.Mesh
Before.China's urban wastewater treatment efficiency is also in the relatively low stage, and ton water high energy consumption is the highest；It is known that sewage disposal row
Industry is highly energy-consuming trade, and within 2012, the total power consumption of wastewater treatment in China industry is up to 12,500,000,000 kWh, and unit power consumption is 0.29kWh/m3,
If electric rate is 0.7 yuan/kWh, then total electricity charge nearly 9,000,000,000 yuan, and present stage China also have sewage greatly at present
Factory does not has sludge treatment facilities.And along with various places propose the enforcement of mark transformation, wastewater treatment in China energy consumption will be further increased.Cause
This, energy-saving and cost-reducing is the vital task of current wastewater treatment in China factory operation management.
Aerating system is a very important part in biologic process for treating sewage, is used primarily in and supplies oxygen consumption pond
Oxygen, is also topmost power consumption link simultaneously.Account for Sewage Plant under normal circumstances and run the 50%～70% of total power consumption, therefore drop
The energy consumption of low aeration phase, is the energy-saving and cost-reducing most important thing of sewage treatment plant.Aeration control strategy is i.e. by using automatically
Change control instrument, sewage disposal process aeration rate is realized automatically, regulate and control accurately by instrument, reaches reaching stable effluent quality
Mark, the energy-saving and cost-reducing and purpose of minimizing personnel's intervention.
At present, the manual debugging mode that domestic most common aeration control method is the most extensive, it is common that according to operation
Member experience determine aeration rate, if effluent quality do not occur long-term, significantly fluctuate, aeration rate would not be carried out reality
Time regulation；Once service condition changes, and the regulation for aeration rate is still rule of thumb to tune up to turn down, thus causes
The problem that aeration is not enough or aeration is excessive, the aerating system of the treatment plant even having is chronically to exceed and transports under normal duty state
OK, there is no guarantee that not only for effluent quality, substantial amounts of energy consumption more can be caused to waste.And mostly control strategy without reference to oxygen
Mass-transfer efficiency, it is impossible to the relation of accurate assurance aeration rate and conversion ratio causes aeration control inaccurate.
Currently for using ORP (oxidation-reduction potential) and pH to carry out the system of aeration control, due to ORP and pH and
Aeration rate does not has direct linear relationship, and ORP value time delay in a short time is serious, is difficult to accurately during nitrification-denitrification
Judge, thus the most extensive in actual application.Using water quality index as the aeration control of feedforward, ultimate principle is to pass through pollutant
Concentration calculates the amount of oxygen needing to provide, but sewage quality index relies on measuring mostly, and minute needs several little
Time even a couple of days, this effect to controlling in real time is little.Online water quality detection instrument also has the delay of a few hours, and price is held high
Expensive, the most universal.
And intermittent aeration is by the repeatedly starting and stopping to aerator, oxygen consumption pond is made to be in the alternately shape of aeration and not aeration
State, simple and practical, but control performance is unstable, and aerator is typically in peak load, and energy consumption is high, and can reduce fan life,
And the control of the aeration rate that difference is bigger, also can reduce the precision of aeration.Therefore, offer is needed at present badly a kind of the most reliably
Aeration control method.
Summary of the invention
Present invention solves the technical problem that the System and method for being to provide a kind of aeration control, it is possible to realize accurately exposing
Gas, and reach energy-saving and cost-reducing purpose.
In view of this, this application provides a kind of aeration control system, including: data acquisition unit, PLC control unit with
Aeration unit, described data acquisition unit includes that oxygen consumption rate analyzer and dissolved oxygen meter, described aeration unit include drum
Blower fan, micro porous aeration head and effusion meter, described PLC control unit includes switch board and display screen, is provided with in described switch board
Controlling software, described control software includes based on oxygen consumption rate value and the control unit of dissolved oxygen value with the protection of DO feedback
Unit；
The test section of described oxygen consumption rate analyzer stretches in Aeration tank, and described oxygen consumption rate analyzer and PLC control single
Unit's signal connects；
The test section of described dissolved oxygen meter stretches in Aeration tank, and described dissolved oxygen meter is believed with PLC control unit
Number connect；
Described micro porous aeration head is placed in Aeration tank, and the import of described micro porous aeration head connects with described aerator, described
Effusion meter is arranged on the pipeline between described micropore gas explosion head and aerator, and described effusion meter and described aerator are all and PLC
Control unit connects.
Preferably, described aeration control system also includes that agitating device, one end of described agitating device are arranged at Aeration tank
In.
Present invention also provides the method utilizing the aeration control system described in such scheme to carry out aeration control, including with
Lower step:
Dissolved oxygen setting value is inputted in described PLC control unit；
Detect actual dissolved oxygen concentration, if dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, expose according to DO feedback regulation
Aeration rate in gas pond；
If dissolved oxygen setting value-actual dissolved oxygen value≤k1, mud oxygen consumption rate, actual dissolved oxygen according to detection are dense
Degree and the oxygen transfer efficiency calculated, calculated by PLC control unit, obtain the aeration rate required for dissolved oxygen setting value；Described oxygen
Transfer efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；Described k1 is 0.3～0.5mg/L；
Regulate aerator according to described aeration rate, control the aeration rate in Aeration tank.
Preferably, during dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, described actual dissolved oxygen value sets less than dissolved oxygen
During definite value, increased variation coefficient β in last time on the basis of aeration rate and be proportional to (CSetting value-CActual value) value；Described actual dissolved oxygen
When value is more than dissolved oxygen setting value, deducted variation coefficient β on the basis of aeration rate in last time and be proportional to (CActual value-CSetting value) value, β
＞ 0, and be adjusted according to the concrete condition of Aeration tank.
Preferably, described mud oxygen consumption rate is obtained by oxygen consumption rate analyzer on-line determination, the week of described on-line determination
Phase is 15min.
Preferably, described actual dissolved oxygen concentration is monitored in real time by dissolved oxygen monitor and is obtained, described oxygen transfer rate by
Obtained by oxygen consumption rate and last aeration rate calculate.
Preferably, the calculating formula obtaining the aeration rate required for dissolved oxygen setting value is:
Wherein, Q is actual aeration rate, and OUR is active sludge oxygen-consuming rate, VAeration tankFor Aeration tank volume, tThe control cycleFor OUR
Time required for Instrument measuring one value, CSetting valueFor target dissolved oxygen concentration to be reached after regulation and control, CActual valueFor dissolved oxygen
The practical measurement dissolved oxygen concentration of probe；
SOTR is aerator clear water oxygenation capacity under Q tolerance, and for saturated dissolved oxygen under standard state, k is saturated dissolved oxygen
Corrected parameter, SOTE is aerator coefficient of oxygen utilization in normal conditions,For saturated dissolved oxygen concentration under the status of criterion.
The invention provides a kind of aeration control system, comprising: data acquisition unit, PLC control unit and aeration list
Unit, described data acquisition unit includes oxygen consumption rate (OUR) analyzer and dissolved oxygen (DO) analyzer, and described aeration unit includes
Aerator, micro porous aeration head and effusion meter.The aeration control system that the application provides is for controlling parameter based on oxygen consumption rate OUR
Aerating system, this control system by measure Aeration tank activated sludge real-time oxygen consumption, should supply for aerating system
Amount of oxygen provides foundation accurately, by measuring the oxygen consumption rate of aeration control system, calculates the aeration rate being actually needed supply,
Meanwhile, the application difference by actual dissolved oxygen concentration and dissolved oxygen concentration setting value, timely adjustment aeration rate, so that aeration rate
The amplitude of accommodation reduce, furthermore achieved that the accurate control of aeration rate；I.e. the application is by DO setting value and DO measured value
The absolute value of difference, regulates and controls aeration rate accurately, if the absolute value of above-mentioned difference is more than k1, the most directly regulates aeration rate, if
The absolute value of above-mentioned difference is less than or equal to k1, the most on-line automatic collection OUR value and DO value, feeds back to PLC, by controlling
Algorithm calculates required aeration rate, and output signal changes blower fan aeration rate, realizes accurate aeration, and reach energy-saving and cost-reducing mesh
's.
Accompanying drawing explanation
Fig. 1 is the structural representation of aeration control system of the present invention；
Fig. 2 be aeration control method of the present invention be embodied as flow chart.
Detailed description of the invention
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but
Should be appreciated that these describe simply as to further illustrate the features and advantages of the present invention rather than to the claims in the present invention
Limit.
The embodiment of the invention discloses a kind of aeration control system, including: data acquisition unit, PLC control unit and exposure
Gas unit, described data acquisition unit includes oxygen consumption rate analyzer and dissolved oxygen meter；Described PLC control unit includes control
Hardware such as cabinet processed, display screen and control software, wherein said control software is to realize the program that automatically controls, described in automatically control
Program includes that based on OUR value, OTE value and dissolved oxygen value be main control unit and the protected location with DO feedback；Described exposure
Gas unit includes aerator, micro porous aeration head and effusion meter；
The air tube of described oxygen consumption rate analyzer stretches in Aeration tank, and described oxygen consumption rate analyzer and PLC control single
Unit's signal connects；
The probe of described dissolved oxygen meter is immersed in Aeration tank, and described dissolved oxygen meter is believed with PLC control unit
Number connect；
Described micro porous aeration head is placed in bottom Aeration tank, and the ventilation shaft of described micro porous aeration head is with described aerator even
Logical, described effusion meter is arranged on the pipeline between described micropore gas explosion head and aerator, described effusion meter and described aerator
All it is connected with PLC control unit.
The control unit of PLC is mainly arranged by the application, and it except being provided with based on OUR value and dissolved oxygen value is
Main control unit, is additionally provided with DO feedback protection unit；Above-mentioned control unit is directly inputted i.e. by those skilled in the art
Can, this application is had no particular limits.
Described DO feedback protection unit is when dissolved oxygen concentration fluctuation (actual dissolved oxygen concentration and dissolved oxygen setting value difference
Absolute value) start more than during k1, and aeration control system based on described OUR is out of service.
As it is shown in figure 1, the structural representation that Fig. 1 is aeration control system of the present invention, in figure, 1 is Aeration tank, and 2 is dissolved oxygen
(DO) real-time monitor, 3 is mud oxygen consumption rate (OUR) analyzer, and 4 is agitating device, and 5 is programmable logic control unit
(PLC), 6 is aerating pipelines, and 7 is data signal transmission wire, and 8 is aerator, and 9 is effusion meter, and 10 is micro porous aeration head.
In order to make the oxygen distribution in Aeration tank uniform, herein described aeration control system also includes agitating device 4, institute
The one end stating agitating device 4 is arranged in described Aeration tank.Micro porous aeration head 11 increases the specific surface area of air bubble, thus
Increase the transfer efficiency of oxygen.
Aeration tank described herein, mud oxygen consumption rate analyzer, agitating device, dissolved oxygen real-time monitor, flow
Meter, aerating pipelines, aerator, data signal transmission wire and micro porous aeration head are equipment well known to those skilled in the art, right
Its source is the application have no particular limits.OUR analyzer described herein is for detecting the activated sludge consumption in Aeration tank
Oxygen speed, described DO analyzer is for the dissolved oxygen content of monitoring Aeration tank in real time.
The control system that described PLC control system is well known to those skilled in the art, it includes that data acquisition end, data are aobvious
Show window and system auto-control software.
Herein described OUR analyzer and DO analyzer measure the OUR value in Aeration tank and DO value respectively；Wherein oxygen consumption speed
Rate (OUR) refers to that in mud, microorganism utilizes Organic substance to carry out the speed of consumed oxygen during Repiration, is to characterize in mud
The important indicator of microbial activity, represents actual oxygen demand.
Herein described aeration control system by PLC control unit according to the OUR value of on-line automatic collection and DO value, elder generation
Carry out the judgement of DO actual value and DO setting value difference, if difference is relatively big, first regulate aeration rate；If difference is less, then root
Automatically calculate the aeration rate that need to supply according to formula, then signal output is changed air blast flux, and ensure that the accurate of aeration control
Property.Thus, present invention also provides a kind of method utilizing above-mentioned aeration control system to carry out aeration control, including following step
Rapid:
Dissolved oxygen setting value is inputted in described PLC control unit；
Detect actual dissolved oxygen concentration, if dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, expose according to DO feedback regulation
Aeration rate in gas pond；
If dissolved oxygen setting value-actual dissolved oxygen value≤k1, mud oxygen consumption rate, actual dissolved oxygen according to detection are dense
Degree and the oxygen transfer efficiency calculated, calculated by PLC control unit, obtain the aeration rate required for dissolved oxygen setting value；Described oxygen
Transfer efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；Described k1 is 0.3～0.5mg/L；
Regulate aerator according to described aeration rate, control the aeration rate in Aeration tank.
Said process particularly as follows:
Dissolved oxygen setting value is inputted in described PLC control unit；
Detect actual dissolved oxygen concentration, if dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, feed back aeration according to DO
Amount is adjusted；
Detect actual dissolved oxygen concentration, if dissolved oxygen setting value-actual dissolved oxygen value≤k1, according to the mud consumption of detection
Oxygen speed and actual dissolved oxygen concentration, calculated by PLC control unit, obtain actual instantaneous oxygen-supplying amount, according to actual aeration parameter
With oxygen transfer efficiency, PLC control unit calculate, obtain aerating system performance evaluation parameters；Described oxygen transfer efficiency is controlled by PLC
Unit processed is calculated according to described mud oxygen consumption rate；
According to the instantaneous oxygen-supplying amount of described reality, dissolved oxygen setting value and aerating system performance evaluation parameters, PLC control single
Unit calculates, and obtains the aeration rate required for dissolved oxygen setting value；
Regulate aerator according to described aeration rate, control the aeration rate in Aeration tank.
A kind of method that this application provides aeration control, determines whether to start according to measured actual dissolved oxygen value
DO feedback protection system.Concrete, if described actual dissolved oxygen value is higher or lower than setting value more than k1, then DO feedback is protected
Protect unit starting, make the rapid approaching setting value of actual dissolved oxygen by reducing or increase aeration rate；When actual dissolved oxygen
When being less than or equal to k1 with the difference of setting value, DO feedback protection unit is closed, is carried out the calculating process of aeration rate.Above-mentioned k1 is root
Depending on practical situation according to oxygen consumption pond, in the range from 0.3～0.5mg/L, according to the concrete situation of Aeration tank, can be at this model
Enclose interior regulation.Said process is as shown in Figure 2.
According to the present invention, the method for described aeration control is to carry out different operations under certain condition.As in figure 2 it is shown,
Such as the schematic flow sheet that figure is aeration control method of the present invention.First, PLC control unit inputs dissolved oxygen setting value, inspection
Survey actual dissolved oxygen concentration, if dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, the aeration rate in regulation Aeration tank；Specifically
, at CSetting value-CActual valueDuring ＞ k1, increased variation coefficient β in last time on the basis of aeration rate and be proportional to (CSetting value-CActual value) value；
At CActual value-CSetting valueDuring ＞ k1, deducted variation coefficient β on the basis of aeration rate in last time and be proportional to (CActual value-CSetting value-) value；By
This can realize when fluctuating margin exceed ± k1 time, in time by increasing rapidly or reduction air quantity reduces fluctuating margin, described
Variation coefficient β ＞ 0, and be adjusted according to the concrete condition of Aeration tank.
This algorithm, CSetting value-CActual value> k1 time enable.
After carrying out above-mentioned adjustment, if the difference of DO actual value and DO setting value is still greater than k1, then proceed DO feedback
Adjust aeration rate, if difference is less than k1, then carry out aeration control based on OUR.According to the present invention, described system is not constantly running
, above-mentioned DO feedback protection is not limited with the sequencing of exact algorithm based on OUR measured value, i.e. the application provides
Control method essence be the control method of a condition.
The process that the application utilizes described aeration control system to carry out aeration control is: in described PLC control unit
Software in input desired DO value, input initial aeration rate；OUR value is measured according to oxygen consumption rate (OUR) analyzer；According to oxygen
Gas transfer rate (OTE) and the isoparametric relation of OUR, calculate oxygen transfer efficiency (OTE) value；According to actual aeration rate and its
The relation function formula of its parameter calculates required actual aeration rate；According to described aeration rate, blower fan is adjusted.
In above process, described mud oxygen consumption rate is to be recorded by active sludge oxygen-consuming rate on-line determination device, institute
Stating determinator time interval is 15min；Described actual dissolved oxygen concentration is obtained by the detection of dissolved oxygen real-time monitor.
Described aerating system performance evaluation parameters is the important indicator of the comprehensive oxygenation capacity of state of the art aeration, by online
Determinator obtains with actual aeration parameter, and described actual aeration parameter includes aerator clear water oxygenation capacity, based on water quality base
Saturated dissolved oxygen concentration under the corrected parameter of this condition, standard state；Described actual aeration rate is recorded by effusion meter.
Above-mentioned calculating process all controls to obtain by PLC.
First being the calculating process of actual instantaneous oxygen-supplying amount, the calculating formula of described oxygen-supplying amount is shown below:
Wherein, OUR is active sludge oxygen-consuming rate, VAeration tankFor Aeration tank volume, tThe control cycleFor the OUR Instrument measuring cycle,
CSetting valueFor desired value to be reached after regulation and control, CActual valuePractical measurement value for dissolved oxygen probe；In above parameter, VAeration tank、
CSetting value、tThe control cycleFor the parameter being previously set, OUR and CActual valueFor Instrument measuring value；According to above-mentioned calculating formula and Instrument measuring
Value, can be calculated oxygen-supplying amount.
Carrying out the calculating of aerating system performance evaluation parameters the most again, calculating formula is as follows:
Wherein, Q is actual aeration rate, and SOTR is aerator clear water oxygenation capacity under Q tolerance, for saturated molten under standard state
Solving oxygen, k is the corrected parameter of saturated dissolved oxygen；θ is the temperature corrected parameter of oxygen transfer efficiency；In above parameter, CActual valueFor instrument
Device measured value, SOTR, k, θ are setting value, wherein: θ=0.888.
SOTR can change along with the change of aeration rate, and k can change along with the change of water quality, can be along with the change of temperature
And change, can change along with the change of test site position, therefore parameter k is variable.Comparatively speaking, SOTR can be by dirt
Aerator product used by water treatment plant performance indications explanation in obtain, k can first carry out saturated dissolved oxygen in sewage mensuration and
After on-the-spot atmospheric pressure measures, it is defaulted as definite value afterwards.During calculating aerating system performance evaluation parameters, Q is actual
Aeration rate, if particularly as follows: aerating system starts first, then Q is the aeration rate set, if after aerating system runs a period of time,
Then Q is the aeration rate that last computation obtains, in order to distinguish, aeration rate last time by last time with actual aeration rate during this
Aeration rate is set as Q1.
In above-mentioned formula, OTE is by obtaining that its relation with other parameter calculates, oxygen transfer efficiency (OTE)
Carry out according to following rule:
Wherein, OT is the consumption of oxygen in Aeration tank, and OS is air demand, and OUR is active sludge oxygen-consuming rate, VAeration tankFor
Aeration tank volume, Q1 is the last operation values of the aeration rate of practical measurement.
The calculating formula of above-mentioned OTE is substituted in the formula of aerating system performance evaluation parameters, i.e. can get aerating system
Parameter can be assessed.
Finally carry out the calculating of aeration rate, carrying out according to following rule of aeration rate:
Wherein, SOTE is aerator coefficient of oxygen utilization in normal conditions.
Bring above AOR intoAlwaysWith the computing formula of α F, show that the computing formula of actually required aeration rate Q is as follows:
Wherein, Q is actual aeration rate, and OUR is active sludge oxygen-consuming rate, VAeration tankFor Aeration tank volume, tThe control cycleFor OUR
The Instrument measuring cycle, CSetting valueFor desired value to be reached after regulation and control, C actual value is the practical measurement value of dissolved oxygen probe,
SOTR is aerator clear water oxygenation capacity under Q tolerance, and for saturated dissolved oxygen under standard state, k is the correction ginseng of saturated dissolved oxygen
Number；In above parameter, VAeration tank、CSetting value、tThe control cycle, SOTR, k be the parameter being previously set, OUR and CActual valueFor Instrument measuring value,
OTE is value of calculation.K can change along with the change of the test condition such as water quality, pressure, but k can first carry out saturated dissolving in sewage
After the mensuration of oxygen and on-the-spot atmospheric pressure measure, it is defaulted as definite value.During calculating aeration rate, Q1 is the exposure of practical measurement
The last operation values of tolerance.The computing formula of above-mentioned OTE is brought in the formula of Q, draw the calculating of actually required aeration rate Q
Formula is as follows:
The application aeration control method utilizes described aeration control system to carry out monitoring in real time and the calculating of aeration rate,
During actual aeration control, aeration rate is as the change variation in real time of on-line monitoring numerical value and above-mentioned parameter, by PLC
Control unit directly exports and controls aeration unit.
This algorithm, CSetting value-CActual valueEnable during≤k1.
The present invention utilizes above-mentioned aeration control system to carry out the process of aeration control, particularly as follows:
When actual dissolved oxygen value is not equal to setting value, PLC can join according to described mud oxygen consumption rate, oxygen transfer efficiency etc.
Number, recalculates air quantity, regulation blower fan or increase aeration rate or reduction aeration rate makes actual dissolved oxygen the lightest in setting value
Microwave moves；
In the case of larger fluctuation occurs in mud oxygen consumption rate, show that unconventional state occurs in the activity of mud, now
Aeration rate then also there will be large change to adapt to mud life state now；
When described actual dissolved oxygen value variation tendency fluctuates up and down in setting value, and when fluctuation is less than k1, then can determine that
Achieve the stability contorting of aeration；
When the fluctuation of described actual dissolved oxygen value is more than k1, now starts DO and protect system.
Present invention also provides the method utilizing described aeration control system to carry out aeration control, described system automatically controls
Software is by input automatic control algorithm, in conjunction with OUR value and the DO value of on-line automatic collection, and according to OUR value and aeration rate
The variable OTE value calculated, jointly calculates the aeration rate that need to supply, then signal output is changed air blast flux, it is ensured that DO is stable
In setting value, deviation less than ± k1, if DO value deviation exceed ± k1 even more greatly, now DO is too low, can affect water outlet water
Matter, too high, show that aeration excessively can cause power consumption to waste, now can starting protection system.The supply and demand finally realizing oxygen is moved
State balances, and reaches the effluent quality poor that can stop to cause for hypoxgia, also can reduce what too much aeration caused simultaneously
Energy dissipation.
Aeration control system of the present invention is by tying accurate aeration algorithm based on OUR mutually with DO feedback protection module
Close, be possible not only to realize accurate measurements sludge activity, it is achieved the accurate control of aeration rate, moreover it is possible to solution system is made when going wrong
The dissolved oxygen become is the most too high or too low, reaches effluent quality steady in a long-term and energy-saving and cost-reducing purpose.
In order to be further appreciated by the present invention, the aeration control system present invention provided below in conjunction with embodiment and aeration control
Method processed is described in detail, and protection scope of the present invention is not limited by the following examples.
Embodiment 1
Setting expectation dissolved oxygen concentration, the dissolved oxygen value of setting is to make actual aeration rate and expectation by change aeration rate
Value is the most close or consistent；
First the control algolithm program in description above is write PLC control unit 5, when aeration control system starts running
After, DO concentration in dissolved oxygen (DO) analyzer 2 the real time measure sewage, it is sent to PLC control unit by data signal transmission wire 7
5, OUR analyzers 3 can be by data feedback to PLC control unit 5, and air quantity is believed in real time by effusion meter 9 by data signal transmission wire 7
Number sending PLC control unit 5 to, PLC control unit calculates required aeration rate by Algorithms Integration, and result of calculation is with letter
Number mode sends control aerator 8 to, by gas path pipe discharge quantity of fan to Aeration tank 1.
Concrete, the specific works step of described OUR analyzer 3 is surveyed mixed liquor 1L by absorption, and aeration makes its DO concentration
Reaching 6～8mg/L, be pumped into respiratory chamber, software program is automatically made DO and is changed over curve and try to achieve this slope of curve
K, is the OUR value of active microorganism in activated sludge；The test sample time interval of described OUR analyzer 3 is that 15min, OUR measure
Instrument 3 often measures an OUR value, until before next measured value feedback, PLC control unit 5 can be according to this OUR value and DO analyzer
The measured value of 2 and OTE value of calculation carry out calculating required aeration rate；
In described OTE computing formula input PLC control unit 5；
Described PLC control unit 5 includes data collection module, order sending module, data display screen and historical data mould
Block, the irrelevance of variation tendency with dissolved oxygen setting value by observing actual dissolved oxygen value judges the product of aeration control system
Matter.
Embodiment 2
The volume of Aeration tank is 0.25m3, owing to the mensuration cycle of OUR analyzer is 15 minutes event setup control cycles to be
15min, SOTE=20%, SOTR=0.03kg/h, k=0.75, C* ∞20It it is the saturation values of dissolved oxygen at 20 DEG C；
The initial set value of dissolved oxygen is 2, after all OUR analyzer, DO analyzer are accessed PLC with aerating system
Coming into effect aeration control, the every 15min of OUR analyzer measures a value, and DO analyzer is the real time measure, OUR, OTE, DO tri-
The each change of value all can pass to PLC control cabinet by signal transmssion line, and calculates practically necessary air quantity, output signal
Fan regulates and controls the air quantity of blower fan.The numerical value of effusion meter can be shown by holding wire and record on PLC display screen.
OUR and OTE value change little in stable conditions, the stable scope at ± k1 of the Control platform of dissolved oxygen；If
Occur that uncertain problem makes dissolved oxygen value fluctuation excessive, then need to start DO feedback protection system and be adjusted.
Increase by a relatively large margin if the value of OUR has or reduce, PLC value of calculation can be transferred to flow controller order its
Carry out aeration rate adjustment so that actual dissolved oxygen revert to rapidly the level of 2.
1, as OUR=30mg/L h, DOSetting valueDuring=2.0mg/L, if actual dissolved oxygen DOActual value=2.0mg/L, then
Adjust Q=7.85L/min；
2, as OUR=30mg/L h, DOActual valueWhen=2.0mg/L rises to 2.1mg/L, then adjust Q=7.54L/min；
If 3 now OUR=30mg/L h, k1=0.5mg/L, DOActual valueWhen dropping to 1.4mg/L, start DO feedback protection
System, sets β=5, and the aeration rate Q of last time is 8.48L/min, now adjusts Q=11.48L/min.
Being exceeded setting value 2mg/L by 1 to 2 due to actual dissolved oxygen, aeration rate reduces the most accordingly so that actual molten
Solve oxygen gradually to fall after rise to closer to setting value；By 1 to 3 due to CSetting value-CActual value> 0.5mg/L, start DO feedback protection system,
Increase aeration rate, make actual dissolved oxygen value rapid increase.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out
Some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (7)
1. an aeration control system, including: data acquisition unit, PLC control unit and aeration unit, described data acquisition list
Unit includes that oxygen consumption rate analyzer and dissolved oxygen meter, described aeration unit include aerator, micro porous aeration head and effusion meter,
Described PLC control unit includes switch board and display screen, is provided with control software in described switch board, wraps in described control software
Include based on oxygen consumption rate value and the control unit of dissolved oxygen value with the protected location of DO feedback；
The test section of described oxygen consumption rate analyzer stretches in Aeration tank, and described oxygen consumption rate analyzer is believed with PLC control unit
Number connect；
The test section of described dissolved oxygen meter stretches in Aeration tank, and described dissolved oxygen meter is with PLC control unit signal even
Connect；
Described micro porous aeration head is placed in Aeration tank, and the import of described micro porous aeration head connects with described aerator, described flow
Meter is arranged on the pipeline between described micropore gas explosion head and aerator, and described effusion meter and described aerator all control with PLC
Unit connects.
Aeration control system the most according to claim 1, it is characterised in that described aeration control system also includes stirring dress
Putting, one end of described agitating device is arranged in Aeration tank.
3. the method utilizing the aeration control system described in claim 1 to carry out aeration control, comprises the following steps:
Dissolved oxygen setting value is inputted in described PLC control unit；
Detect actual dissolved oxygen concentration, if dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, according to DO feedback regulation Aeration tank
In aeration rate；
If dissolved oxygen setting value-actual dissolved oxygen value≤k1, according to detection mud oxygen consumption rate, actual dissolved oxygen concentration and
The oxygen transfer efficiency calculated, is calculated by PLC control unit, obtains the aeration rate required for dissolved oxygen setting value；Described oxygen shifts
Efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；Described k1 is 0.3～0.5mg/L；
Regulate aerator according to described aeration rate, control the aeration rate in Aeration tank.
Method the most according to claim 3, it is characterised in that during dissolved oxygen setting value-actual dissolved oxygen value ＞ k1, institute
When stating actual dissolved oxygen value less than dissolved oxygen setting value, increased variation coefficient β in last time on the basis of aeration rate and be proportional to
(CSetting value-CActual value) value；When described actual dissolved oxygen value is more than dissolved oxygen setting value, deducted change in last time on the basis of aeration rate
Change factor beta and be proportional to (CActual value-CSetting value) value, β ＞ 0, and being adjusted according to the concrete condition of Aeration tank.
Method the most according to claim 3, it is characterised in that described mud oxygen consumption rate is online by oxygen consumption rate analyzer
Mensuration obtains, and the cycle of described on-line determination is 15min.
Method the most according to claim 3, it is characterised in that described actual dissolved oxygen concentration is real-time by dissolved oxygen monitor
Monitoring obtains, obtained by described oxygen transfer rate is calculated by oxygen consumption rate and last aeration rate.
Method the most according to claim 3, it is characterised in that obtain the calculating of aeration rate required for dissolved oxygen setting value
Formula is:
Wherein, Q is actual aeration rate, and OUR is active sludge oxygen-consuming rate, VAeration tankFor Aeration tank volume, tThe control cycleFor OUR instrument
Measure the time required for a value, CSetting valueFor target dissolved oxygen concentration to be reached after regulation and control, CActual valueFor dissolved oxygen probe
Practical measurement dissolved oxygen concentration；
SOTR is aerator clear water oxygenation capacity under Q tolerance, and for saturated dissolved oxygen under standard state, k is repairing of saturated dissolved oxygen
Positive parameter, SOTE is aerator coefficient of oxygen utilization in normal conditions,For saturated dissolved oxygen concentration under the status of criterion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610757777.1A CN106277299B (en) | 2016-08-29 | 2016-08-29 | Aeration control system and method based on oxygen consumption rate tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610757777.1A CN106277299B (en) | 2016-08-29 | 2016-08-29 | Aeration control system and method based on oxygen consumption rate tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106277299A true CN106277299A (en) | 2017-01-04 |
| CN106277299B CN106277299B (en) | 2020-07-31 |
Family
ID=57675717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610757777.1A Expired - Fee Related CN106277299B (en) | 2016-08-29 | 2016-08-29 | Aeration control system and method based on oxygen consumption rate tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106277299B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956922A (en) * | 2018-08-02 | 2018-12-07 | 三峡大学 | Monitor the device of water body methane wear rate |
| CN109775845A (en) * | 2017-11-14 | 2019-05-21 | 北京天诚同创电气有限公司 | Amount of oxygen exposure control method and device in sewage treatment |
| CN111217449A (en) * | 2020-01-23 | 2020-06-02 | 苏州业华环境科技有限公司 | Sewage treatment device and method based on accurate control of oxygen input |
| CN113754049A (en) * | 2021-09-09 | 2021-12-07 | 广汽丰田汽车有限公司 | Biochemical pool aeration device, sewage treatment method, system and storage medium |
| CN114249437A (en) * | 2021-12-21 | 2022-03-29 | 北控(秦皇岛)水务有限责任公司 | Control method and device applied to sewage treatment |
| CN114291911A (en) * | 2021-12-20 | 2022-04-08 | 安徽泛湖生态科技股份有限公司 | Sewage aeration control method based on oxygen transfer efficiency |
| CN115215438A (en) * | 2022-08-03 | 2022-10-21 | 中持水务股份有限公司 | Accurate aeration and dosing combined control method and system for multistage AO biochemical pool |
| CN115259413A (en) * | 2022-07-25 | 2022-11-01 | 苏州水星环保工业***有限公司 | Air volume control method for precise aeration system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193310A (en) * | 1995-06-22 | 1998-09-16 | 比萨斯科有限公司 | Controlling of wastewater treatment by monitoring oxygen utilisation rates |
| CN201903539U (en) * | 2010-12-03 | 2011-07-20 | 北京工业大学 | Frequency-converting speed-regulating fast online detecting device for specific oxygen uptake rate |
| CN102156432A (en) * | 2011-02-22 | 2011-08-17 | 上海市城市建设设计研究院 | Method for controlling aeration in biochemical reaction tank in real time |
| CN104787872A (en) * | 2015-04-29 | 2015-07-22 | 梁锐振 | Aeration rate control method and system |
-
2016
- 2016-08-29 CN CN201610757777.1A patent/CN106277299B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193310A (en) * | 1995-06-22 | 1998-09-16 | 比萨斯科有限公司 | Controlling of wastewater treatment by monitoring oxygen utilisation rates |
| CN201903539U (en) * | 2010-12-03 | 2011-07-20 | 北京工业大学 | Frequency-converting speed-regulating fast online detecting device for specific oxygen uptake rate |
| CN102156432A (en) * | 2011-02-22 | 2011-08-17 | 上海市城市建设设计研究院 | Method for controlling aeration in biochemical reaction tank in real time |
| CN104787872A (en) * | 2015-04-29 | 2015-07-22 | 梁锐振 | Aeration rate control method and system |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775845A (en) * | 2017-11-14 | 2019-05-21 | 北京天诚同创电气有限公司 | Amount of oxygen exposure control method and device in sewage treatment |
| CN109775845B (en) * | 2017-11-14 | 2022-02-18 | 北京天诚同创电气有限公司 | Method and device for controlling oxygen exposure in sewage treatment |
| CN108956922B (en) * | 2018-08-02 | 2019-05-28 | 三峡大学 | Monitor the device of water body methane wear rate |
| CN108956922A (en) * | 2018-08-02 | 2018-12-07 | 三峡大学 | Monitor the device of water body methane wear rate |
| CN111217449A (en) * | 2020-01-23 | 2020-06-02 | 苏州业华环境科技有限公司 | Sewage treatment device and method based on accurate control of oxygen input |
| CN111217449B (en) * | 2020-01-23 | 2022-05-31 | 苏州业华环境科技有限公司 | Sewage treatment device and method based on accurate control of oxygen input |
| CN113754049B (en) * | 2021-09-09 | 2023-06-23 | 广汽丰田汽车有限公司 | Biochemical tank aeration device, sewage treatment method, system and storage medium |
| CN113754049A (en) * | 2021-09-09 | 2021-12-07 | 广汽丰田汽车有限公司 | Biochemical pool aeration device, sewage treatment method, system and storage medium |
| CN114291911A (en) * | 2021-12-20 | 2022-04-08 | 安徽泛湖生态科技股份有限公司 | Sewage aeration control method based on oxygen transfer efficiency |
| CN114249437A (en) * | 2021-12-21 | 2022-03-29 | 北控(秦皇岛)水务有限责任公司 | Control method and device applied to sewage treatment |
| CN114249437B (en) * | 2021-12-21 | 2023-09-29 | 北控(秦皇岛)水务有限责任公司 | Control method and device applied to sewage treatment |
| CN115259413A (en) * | 2022-07-25 | 2022-11-01 | 苏州水星环保工业***有限公司 | Air volume control method for precise aeration system |
| CN115215438A (en) * | 2022-08-03 | 2022-10-21 | 中持水务股份有限公司 | Accurate aeration and dosing combined control method and system for multistage AO biochemical pool |
| CN115215438B (en) * | 2022-08-03 | 2024-05-03 | 中持水务股份有限公司 | Precise aeration and dosing combined control method and system for multi-stage AO biochemical pool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106277299B (en) | 2020-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106277299A (en) | A kind of aeration control system based on oxygen consumption rate analyzer and method | |
| CN106277383A (en) | A kind of aeration control system based on oxygen consumption rate analyzer and method | |
| CN106082430B (en) | A kind of aeration control system and aeration control method | |
| CN106430662B (en) | Aeration control system and method | |
| CN104238527B (en) | Precise control method of sewage treatment plant aeration total quantity | |
| CN109607770B (en) | Multi-scene self-learning carbon source intelligent adding system and method for denitrification tank | |
| CN114230110B (en) | Short-range intelligent phosphorus removal and medicine addition control method, equipment and system for sewage treatment | |
| CN104090488B (en) | The method that sewage plant controls dissolved oxygen, sludge loading and sludge age in real time automatically | |
| CN205740480U (en) | A kind of biological tank intelligence aerating system | |
| CN101717143A (en) | Method for controlling automatic flocculant addition | |
| CN109205808A (en) | A kind of accurate aeration control method based on water outlet ammonia nitrogen and dissolved oxygen | |
| CN114275876A (en) | Accurate and intelligent carbon source adding control system and method | |
| CN114538612A (en) | External carbon source accurate dosing system and control method thereof | |
| CN114132980B (en) | Short-range intelligent accurate aeration control method, equipment and system for sewage treatment | |
| US8221631B1 (en) | Aeration basin with off gas monitoring | |
| CN111018110A (en) | Sewage biochemical treatment system and control method | |
| JP6655975B2 (en) | Aeration control device and aeration control method | |
| CN202808475U (en) | Surface aeration energy-saving control device | |
| CN207845269U (en) | constant DO control system based on real-time OUR | |
| CN113759832A (en) | Intelligent operation method for sewage plant | |
| CN116578124A (en) | Economical sewage dephosphorization control system based on machine learning | |
| CN113307365B (en) | Device and method for automatically determining optimal adding ratio and continuous adding stabilization time of denitrification carbon source | |
| CN206232477U (en) | A kind of dissolved oxygen automatic control system | |
| CN106186381B (en) | A kind of aeration control system and aeration control method | |
| CN112214044B (en) | Circulating water automatic control system and method based on total amount control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200731 Termination date: 20210829 |