CN106277383A - 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
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- CN106277383A CN106277383A CN201610757780.3A CN201610757780A CN106277383A CN 106277383 A CN106277383 A CN 106277383A CN 201610757780 A CN201610757780 A CN 201610757780A CN 106277383 A CN106277383 A CN 106277383A
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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
- C02F7/00—Aeration of stretches of water
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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
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a kind of aeration control system, this system includes: data acquisition unit, PLC control unit, aeration unit, and described data acquisition unit includes OUR analyzer and DO analyzer, and described aeration unit includes aerator, micro porous aeration head and effusion meter.Present invention also provides the method utilizing described aeration control system to carry out aeration control, described system auto-control software is by input automatic control algorithm, automatically the OUR value gathered in conjunction with online analyzer and DO value, and the variable OTE value calculated according to OUR and aeration rate, jointly calculate the aeration rate that need to supply, again signal output is changed air blast flux, ensure that DO is stable in setting value, deviation is less than 0.5mg/L, realize the supply and demand dynamic equilibrium of oxygen, the effluent quality poor caused for hypoxgia can be stopped, also can reduce the energy dissipation that too much aeration causes simultaneously, there is the function of the height of assessment aerating system performance simultaneously.
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
Aeration control 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.
DO (dissolved oxygen) control methods is when the DO value of feedback is more than setting value, turns down valve opening, reduces the blow rate required；If
The DO value of feedback is less than setting value, will increase air quantity to increase DO value, and such problem caused is that data fluctuations is the biggest.Right
In using ORP (oxidation-reduction potential) and pH to carry out the system of aeration control, due to ORP and pH with aeration rate the most directly
Linear relationship, and ORP value time delay in a short time is serious, is difficult to accurately judge, in actual applications during nitrification-denitrification
The most extensive.Using water quality index as the aeration control of feedforward, ultimate principle is to be calculated by pollutant levels to need to provide
Amount of oxygen, but sewage quality index relies on measuring mostly, minute needs even a couple of days a few hours, and this is in real time
The effect controlled is little.Online water quality detection instrument also has the delay of a few hours, and 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.
Therefore, a kind of aeration control method the most reliably of offer is provided badly at present.
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；
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 micro porous aeration 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.
Preferably, described PLC control unit includes data acquisition end, data display window and system auto-control software.
Present invention also provides the method utilizing the aeration control system described in such scheme to carry out aeration control, including with
Lower step:
Given dissolved oxygen setting value in described PLC control unit；
Mud oxygen consumption rate according to detection, actual dissolved oxygen concentration and the oxygen transfer efficiency of calculating, obtain dissolved oxygen and set
Aeration rate required for definite value；Described oxygen transfer efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；
Regulate aerator according to described aeration rate, control the aeration rate in 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 OUR 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.
Preferably, the aeration rate in described control Aeration tank particularly as follows:
When actual dissolved oxygen value is not equal to setting value, PLC is according to described mud oxygen consumption rate and oxygen transfer efficiency, again
Calculate air quantity, regulation blower fan or increase aeration rate or reduction aeration rate makes actual dissolved oxygen in the upper and lower slight fluctuations of setting value；
When described actual dissolved oxygen value variation tendency fluctuates up and down in setting value, and fluctuation less than ± 0.5mg/L time, real
Show the stability contorting of aeration.
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 ginseng based on oxygen consumption rate (OUR)
The aerating system of number, this control system, by measuring the real-time oxygen consumption rate of Aeration tank activated sludge, should supply for aerating system
The amount of oxygen given provides foundation accurately, by the oxygen consumption rate and the actual dissolved oxygen concentration that measure, calculates and is actually needed confession
The aeration rate given；I.e. the application is by the OUR value of on-line automatic collection and DO value, feeds back to PLC, passes through control algolithm
Calculating required aeration rate, output signal changes blower fan aeration rate, realizes accurate aeration, and reach energy-saving and cost-reducing purpose.
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
The software equipments such as the control program of the hardware devices such as cabinet processed, display screen and write；Described aeration unit includes that aerator, micropore expose
Gas 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.
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 10 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, 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:
Given dissolved oxygen setting value in described PLC control unit；
According to mud oxygen consumption rate, actual dissolved oxygen concentration and the oxygen transfer efficiency of detection, obtain dissolved oxygen setting value institute
The aeration rate needed；Described oxygen transfer efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；
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；
Mud oxygen consumption rate according to detection and actual dissolved oxygen concentration, calculated by PLC control unit, obtains actual instantaneous
Oxygen-supplying amount, according to actual aeration parameter and oxygen transfer efficiency, is calculated by PLC control unit, obtains aerating system Performance Evaluation ginseng
Number；Described oxygen transfer efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；
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.
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.Above-mentioned
Process is concrete as shown in Figure 2.
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 saturated dissolved oxygen concentration, condition of different temperatures under the corrected parameter of this condition, standard state；Described
Actual aeration rate recorded by effusion meter.
Above-mentioned calculating process all controls to obtain by PLC.
Described PLC control unit implant aeration control rule particularly as follows:
Wherein, Q is actual aeration rate, and OUR is active sludge oxygen-consuming rate, VAeration tankFor Aeration tank volume, t controls the cycle and is
The OUR Instrument measuring cycle, CSetting valueFor desired value to be reached after regulation and control, CActual valueFor 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 dissolved oxygen in sewage
Measure and after on-the-spot atmospheric pressure mensuration, be defaulted as definite value.During calculating aeration rate, Q1 is the aeration rate of practical measurement
Last operation values.
The concrete derivation of the application above-mentioned aeration control rule is as follows:
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, C is dissolved oxygen concentration, tThe control cycleFor OUR
The Instrument measuring cycle, CSetting valueFor desired value to be reached after regulation and control, CActual valuePractical measurement value for dissolved oxygen probe；More than join
In number, 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 with
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:
Oxygen transfer efficiency (OTE) computing formula is as follows:
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.
Above-mentioned OTE computing formula is brought into aeration rate formula and draws the equation below of actually required aeration rate Q:
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, at PLC
Control unit directly inputs the computing formula of above-mentioned Q, according to the OUR value recorded and DO value, the most defeated by PLC control unit
Out control aeration unit.The invention provides a kind of is to control the aeration control system of parameter based on oxygen consumption rate OUR, first
Set expectation dissolved oxygen (DO) concentration, measured the value of actual dissolved oxygen by dissolved oxygen meter, and by oxygen consumption rate (OUR)
Instrument measures OUR value, and calculates OTE value, PLC utilize the dissolved oxygen that OUR, OTE and actual dissolved oxygen concentration calculate value and
Expect that the difference of concentration realizes the Boiler pressure control to aerator；Meanwhile, the application utilizes the relation of other parameter and OTE value,
It is calculated OTE value, and is not provided with OTE analyzer, simplify the equipment of control system, but still achieve the accurate control of aeration rate
System.Aeration control system of the present invention is by actual dissolved oxygen in accurate measurements sludge activity and Aeration tank and calculates different work
Oxygen transfer efficiency (OTE) under condition, thereby simplify control process, and can realize accurately controlling of aeration rate, reach long-term
Stable effluent quality 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 control algolithm program is write PLC control unit 5, after aeration control system starts running, dissolved oxygen (DO)
DO concentration in analyzer 2 the real time measure sewage, is sent to PLC control unit 5, OUR analyzer 3 by data signal transmission wire 7
Can be by data feedback to PLC control unit 5, effusion meter 9 sends air volume signal to PLC in real time by data signal transmission wire 7
Control unit 5, PLC control unit calculates required aeration rate by Algorithms Integration, and result of calculation is with aspect transmission
Give and control aerator 8, 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, obtains 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 15min, therefore the setup control cycle is
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, the change that OUR, DO are each
Changing and all can pass to PLC control cabinet by signal transmssion line, and calculate practically necessary air quantity, order is transferred to flow-control
Valve reaches bid value by changing its aperture, and is shown on signal screen by the numerical value of actual air volume by holding wire.
Owing to the change of OUR and OTE value is the most little in stable conditions, the Control platform of dissolved oxygen is stable at ± 0.5mg/L
Scope；
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=2mg/L, if actual dissolved oxygen DOActual value=2mg/L, then Q=
8.63L/min；
2, as OUR=30mg/L h, DOSetting valueWhen rising to 2.5mg/L, then Q=8.06L/min；
If 3 now OUR rise to 35mg/L h, DOActual valueWhen being still 2.5mg/L, Q=8.14L/min.
By 1 to 2, owing to actual dissolved oxygen exceedes setting value 2, aeration rate reduces the most accordingly so that actual dissolving
Oxygen gradually falls after rise to closer to setting value；By 1 to 3, OUR value and DO actual value all increased, but DOActual valueDeviation setting value mistake
Greatly, the amount that OUR increases can not the amount of sufficiently fast prompt drop LDO, so making actual dissolved oxygen value quick to reduce air quantity
Return setting value；By 2 to 3, it can be seen that the increase of OUR shows that sludge activity strengthens needs increase aeration normal to meet it
Existence.
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 (8)
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；
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 micro porous aeration 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.
Aeration control system the most according to claim 1, it is characterised in that described PLC control unit includes data acquisition
End, data display window and system auto-control software.
4. the method utilizing the aeration control system described in claim 1 to carry out aeration control, comprises the following steps:
Given dissolved oxygen setting value in described PLC control unit；
Mud oxygen consumption rate according to detection, actual dissolved oxygen concentration and the oxygen transfer efficiency of calculating, obtain dissolved oxygen setting value
Required aeration rate；Described oxygen transfer efficiency is calculated according to described mud oxygen consumption rate by PLC control unit；
Regulate aerator according to described aeration rate, control the aeration rate in Aeration tank.
Method the most according to claim 4, 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 4, 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 OUR and last aeration rate.
Method the most according to claim 4, 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.
Method the most according to claim 4, it is characterised in that aeration rate in described control Aeration tank particularly as follows:
When actual dissolved oxygen value is not equal to setting value, PLC, according to described mud oxygen consumption rate and oxygen transfer efficiency, recalculates
Air quantity, regulation blower fan or increase aeration rate or reduction aeration rate make actual dissolved oxygen in the upper and lower slight fluctuations of setting value；
When described actual dissolved oxygen value variation tendency fluctuates up and down in setting value, and fluctuation less than ± 0.5mg/L time, it is achieved that
The stability contorting of aeration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610757780.3A CN106277383B (en) | 2016-08-29 | 2016-08-29 | Aeration control system and method based on oxygen consumption rate tester |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109019905A (en) * | 2018-10-18 | 2018-12-18 | 河南倍杰特环保技术有限公司 | A kind of water treatment system based on aeration control |
| CN110104777A (en) * | 2019-06-10 | 2019-08-09 | 江苏复星节能环保有限公司 | A kind of sewage plant DO intelligent control method |
| CN112487603A (en) * | 2020-10-09 | 2021-03-12 | 同济大学 | Blast aeration system oxygenation capacity change determination method and system based on big data |
| KR102334676B1 (en) * | 2020-11-26 | 2021-12-06 | 한국산업기술시험원 | Method for evaluating energy performance efficiency of aerator used in sewage and wastewater treatment process |
| 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 |
| CN114488822A (en) * | 2022-04-12 | 2022-05-13 | 江苏省现代企业信息化应用支撑软件工程技术研发中心 | Intelligent sewage treatment process optimization method based on high-dimensional multi-objective evolutionary algorithm |
| CN115259413A (en) * | 2022-07-25 | 2022-11-01 | 苏州水星环保工业系统有限公司 | Air volume control method for precise aeration system |
| CN117509928A (en) * | 2023-11-03 | 2024-02-06 | 安徽泛湖生态科技股份有限公司 | OTE real-time monitoring-based aeration optimization energy-saving control system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109019905A (en) * | 2018-10-18 | 2018-12-18 | 河南倍杰特环保技术有限公司 | A kind of water treatment system based on aeration control |
| CN109019905B (en) * | 2018-10-18 | 2021-08-03 | 河南倍杰特环保技术有限公司 | Water treatment system based on aeration control |
| CN110104777A (en) * | 2019-06-10 | 2019-08-09 | 江苏复星节能环保有限公司 | A kind of sewage plant DO intelligent control method |
| CN112487603A (en) * | 2020-10-09 | 2021-03-12 | 同济大学 | Blast aeration system oxygenation capacity change determination method and system based on big data |
| CN112487603B (en) * | 2020-10-09 | 2022-06-14 | 同济大学 | Blast aeration system oxygenation capacity change determination method and system based on big data |
| KR102334676B1 (en) * | 2020-11-26 | 2021-12-06 | 한국산업기술시험원 | Method for evaluating energy performance efficiency of aerator used in sewage and wastewater treatment process |
| 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 |
| CN114488822A (en) * | 2022-04-12 | 2022-05-13 | 江苏省现代企业信息化应用支撑软件工程技术研发中心 | Intelligent sewage treatment process optimization method based on high-dimensional multi-objective evolutionary algorithm |
| CN115259413A (en) * | 2022-07-25 | 2022-11-01 | 苏州水星环保工业系统有限公司 | Air volume control method for precise aeration system |
| CN117509928A (en) * | 2023-11-03 | 2024-02-06 | 安徽泛湖生态科技股份有限公司 | OTE real-time monitoring-based aeration optimization energy-saving control system and method |
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